changeset 1675:efbea01d5b5c

Merge
author prr
date Mon, 12 Oct 2015 14:44:02 -0700
parents 11c070dc7985 a7ec2278c13d
children a44eac54cdc3
files common/autoconf/builddeps.conf.example common/autoconf/builddeps.conf.nfs.example common/autoconf/builddeps.m4
diffstat 19 files changed, 7859 insertions(+), 7685 deletions(-) [+]
line wrap: on
line diff
--- a/.hgtags	Tue Oct 06 12:51:53 2015 -0700
+++ b/.hgtags	Mon Oct 12 14:44:02 2015 -0700
@@ -327,3 +327,4 @@
 42b56d1f418523ecb61a49d7493302c80c8009cc jdk9-b82
 ce5c14d97d95084504c32b9320cb33cce4235588 jdk9-b83
 1c8134475511ffe6726677e1418a89a7a45e92d6 jdk9-b84
+1f345217c9bab05f192d00cf1665b3286c49ccdb jdk9-b85
--- a/common/autoconf/basics.m4	Tue Oct 06 12:51:53 2015 -0700
+++ b/common/autoconf/basics.m4	Mon Oct 12 14:44:02 2015 -0700
@@ -288,7 +288,7 @@
   # Publish this variable in the help.
   AC_ARG_VAR($1, [Override default value for $1])
 
-  if test "x[$]$1" = x; then
+  if [[ -z "${$1+x}" ]]; then
     # The variable is not set by user, try to locate tool using the code snippet
     $2
   else
@@ -312,25 +312,32 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="[$]$1"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        AC_MSG_NOTICE([Will search for user supplied tool $1=$tool_basename])
-        AC_PATH_PROG($1, $tool_basename)
-        if test "x[$]$1" = x; then
-          AC_MSG_ERROR([User supplied tool $tool_basename could not be found])
+      # Check if we try to supply an empty value
+      if test "x[$]$1" = x; then
+        AC_MSG_NOTICE([Setting user supplied tool $1= (no value)])
+        AC_MSG_CHECKING([for $1])
+        AC_MSG_RESULT([disabled])
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="[$]$1"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          AC_MSG_NOTICE([Will search for user supplied tool $1=$tool_basename])
+          AC_PATH_PROG($1, $tool_basename)
+          if test "x[$]$1" = x; then
+            AC_MSG_ERROR([User supplied tool $tool_basename could not be found])
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          AC_MSG_NOTICE([Will use user supplied tool $1=$tool_specified])
+          AC_MSG_CHECKING([for $1])
+          if test ! -x "$tool_specified"; then
+            AC_MSG_RESULT([not found])
+            AC_MSG_ERROR([User supplied tool $1=$tool_specified does not exist or is not executable])
+          fi
+          AC_MSG_RESULT([$tool_specified])
         fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        AC_MSG_NOTICE([Will use user supplied tool $1=$tool_specified])
-        AC_MSG_CHECKING([for $1])
-        if test ! -x "$tool_specified"; then
-          AC_MSG_RESULT([not found])
-          AC_MSG_ERROR([User supplied tool $1=$tool_specified does not exist or is not executable])
-        fi
-        AC_MSG_RESULT([$tool_specified])
       fi
     fi
   fi
@@ -376,9 +383,7 @@
 [
   # Start with tools that do not need have cross compilation support
   # and can be expected to be found in the default PATH. These tools are
-  # used by configure. Nor are these tools expected to be found in the
-  # devkit from the builddeps server either, since they are
-  # needed to download the devkit.
+  # used by configure.
 
   # First are all the simple required tools.
   BASIC_REQUIRE_PROGS(BASENAME, basename)
@@ -437,6 +442,7 @@
   BASIC_PATH_PROGS(READLINK, [greadlink readlink])
   BASIC_PATH_PROGS(DF, df)
   BASIC_PATH_PROGS(CPIO, [cpio bsdcpio])
+  BASIC_PATH_PROGS(NICE, nice)
 ])
 
 # Setup basic configuration paths, and platform-specific stuff related to PATHs.
--- a/common/autoconf/boot-jdk.m4	Tue Oct 06 12:51:53 2015 -0700
+++ b/common/autoconf/boot-jdk.m4	Mon Oct 12 14:44:02 2015 -0700
@@ -108,12 +108,6 @@
   fi
 ])
 
-# Test: Is bootjdk available from builddeps?
-AC_DEFUN([BOOTJDK_CHECK_BUILDDEPS],
-[
-  BDEPS_CHECK_MODULE(BOOT_JDK, bootjdk, xxx, [BOOT_JDK_FOUND=maybe], [BOOT_JDK_FOUND=no])
-])
-
 # Test: Is $JAVA_HOME set?
 AC_DEFUN([BOOTJDK_CHECK_JAVA_HOME],
 [
@@ -276,9 +270,6 @@
     AC_MSG_ERROR([The path given by --with-boot-jdk does not contain a valid Boot JDK])
   fi
 
-  # Test: Is bootjdk available from builddeps?
-  BOOTJDK_DO_CHECK([BOOTJDK_CHECK_BUILDDEPS])
-
   # Test: On MacOS X, can we find a boot jdk using /usr/libexec/java_home?
   BOOTJDK_DO_CHECK([BOOTJDK_CHECK_MACOSX_JAVA_LOCATOR])
 
--- a/common/autoconf/builddeps.conf.example	Tue Oct 06 12:51:53 2015 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,66 +0,0 @@
-#
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
-# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-#
-# This code is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License version 2 only, as
-# published by the Free Software Foundation.
-#
-# This code is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-# version 2 for more details (a copy is included in the LICENSE file that
-# accompanied this code).
-#
-# You should have received a copy of the GNU General Public License version
-# 2 along with this work; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-# or visit www.oracle.com if you need additional information or have any
-# questions.
-#
-
-# This is a configuration example using builddeps
-# that are downloaded from an ftp server.
-# This is how you use it:
-
-#configure --with-builddeps-server=ftp://builddeps.server/adir \
-#          --with-builddeps-conf=..../builddeps.conf.example
-#          --with-builddeps-dir=/localdisk/mybuilddeps
-
-# Translate a configuration triplet/quadruplet into something
-# known by this configuration file.
-# If no rewrite was found, then rewritten_target=${OPENJDK_TARGET_AUTOCONF_NAME}
-REWRITE_i686_pc_linux_gnu=i686-unknown-linux-gnu
-REWRITE_i386_pc_solaris2_10=i686-sun-solaris2_10
-
-# The needed cups builddeps are platform independent header files.
-# I.e. they need not be part of the devkit.
-builddep_cups=lib/cups_1_3_9.zip
-builddep_cups_CFLAGS=-I${depdir}
-
-# The devkit is the cross compiler tools and sys-roots
-# for the build platform.
-builddep_devkit=sdk/sdk-${rewritten_build}-20110921.tar.gz
-
-# The freetype dependency is partly platform dependent.
-# It is stored inside the sys-root.
-builddep_freetype2=sdk/sdk-${rewritten_build}-20110921.tar.gz
-builddep_freetype2_CFLAGS=-I${depdir}/${rewritten_target}/sys-root/usr/include/freetype2
-builddep_freetype2_LIBS=-lfreetype
-
-# There are many other build dependencies, but they are implicitly
-# found inside the devkit sys-root.
-
-# The boot jdk runs on the build system and is used to compile and run
-# Java build tools and of course, the bootstrap javac.
-builddep_bootjdk_BUILD_i386_pc_solaris2=java/jdk-7u2-fcs-bin-b13-solaris-i586-17_nov_2011.zip
-builddep_bootjdk_BUILD_x86_64_pc_solaris2=java/jdk-7u2-fcs-bin-b13-solaris-x64-17_nov_2011.zip
-builddep_bootjdk_BUILD_i686_unknown_linux_gnu=java/jdk-7u2-fcs-bin-b13-linux-i586-17_nov_2011.zip
-builddep_bootjdk_BUILD_x86_64_unknown_linux_gnu=java/jdk-7u2-fcs-bin-b13-linux-x64-17_nov_2011.zip
-builddep_bootjdk_BUILD_sparc_solaris2=java/jdk-7u2-fcs-bin-b13-solaris-sparc-17_nov_2011.zip
-builddep_bootjdk_BUILD_sparcv9_solaris2=java/jdk-7u2-fcs-bin-b13-solaris-sparcv9-17_nov_2011.zip
-builddep_bootjdk_BUILD_i386_pc_windows=java/jdk-7u2-fcs-bin-b13-windows-i586-17_nov_2011.zip
-builddep_bootjdk_BUILD_x86_64_pc_windows=java/jdk-7u2-fcs-bin-b13-windows-x64-17_nov_2011.zip
-builddep_bootjdk_ROOT=${depdir}/jdk7_02/jdk1.7.0_02
--- a/common/autoconf/builddeps.conf.nfs.example	Tue Oct 06 12:51:53 2015 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,43 +0,0 @@
-#
-# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
-# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-#
-# This code is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License version 2 only, as
-# published by the Free Software Foundation.
-#
-# This code is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-# version 2 for more details (a copy is included in the LICENSE file that
-# accompanied this code).
-#
-# You should have received a copy of the GNU General Public License version
-# 2 along with this work; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-# or visit www.oracle.com if you need additional information or have any
-# questions.
-#
-
-# This is a configuration example using an nfs-mount /java
-# it will use the builddeps directly from the nfs mounted directory.
-# This is how you use it:
-
-#configure --with-builddeps-conf=..../builddeps.conf.nfs.example
-
-REWRITE_i686_pc_linux_gnu=i686-unknown-linux-gnu
-REWRITE_i386_pc_solaris2_10=i686-sun-solaris2_10
-
-DEVTOOLS=/java/devtools
-
-builddep_cups=${DEVTOOLS}/linux/cups/include
-builddep_cups_CFLAGS=-I${depdir}
-
-JDK_ROOT=/java/re/jdk/7u4/latest/binaries
-builddep_bootjdk_BUILD_i386_pc_solaris2=${JDK_ROOT}/solaris-i586
-builddep_bootjdk_BUILD_x86_64_pc_solaris2=${JDK_ROOT}/solaris-amd64
-builddep_bootjdk_BUILD_i686_unknown_linux_gnu=${JDK_ROOT}/linux-i586
-builddep_bootjdk_BUILD_x86_64_unknown_linux_gnu=${JDK_ROOT}/linux-amd64
-builddep_bootjdk_ROOT=
--- a/common/autoconf/builddeps.m4	Tue Oct 06 12:51:53 2015 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,247 +0,0 @@
-#
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
-# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-#
-# This code is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License version 2 only, as
-# published by the Free Software Foundation.  Oracle designates this
-# particular file as subject to the "Classpath" exception as provided
-# by Oracle in the LICENSE file that accompanied this code.
-#
-# This code is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-# version 2 for more details (a copy is included in the LICENSE file that
-# accompanied this code).
-#
-# You should have received a copy of the GNU General Public License version
-# 2 along with this work; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-# or visit www.oracle.com if you need additional information or have any
-# questions.
-#
-
-AC_DEFUN_ONCE([BDEPS_SCAN_FOR_BUILDDEPS],
-[
-  define(LIST_OF_BUILD_DEPENDENCIES,)
-  if test "x$with_builddeps_server" != x || test "x$with_builddeps_conf" != x; then
-    if test "x$with_builddeps_conf" != x; then
-      AC_MSG_CHECKING([for supplied builddeps configuration file])
-      builddepsfile=$with_builddeps_conf
-      if test -s $builddepsfile; then
-        . $builddepsfile
-        AC_MSG_RESULT([loaded!])
-      else
-        AC_MSG_ERROR([The given builddeps conf file $with_builddeps_conf could not be loaded!])
-      fi
-    else
-      AC_MSG_CHECKING([for builddeps.conf files in sources...])
-      builddepsfile=`mktemp`
-      touch $builddepsfile
-      # Put all found confs into a single file.
-      find ${SRC_ROOT} -name builddeps.conf -exec cat \{\} \; >> $builddepsfile
-      # Source the file to acquire the variables
-      if test -s $builddepsfile; then
-        . $builddepsfile
-        AC_MSG_RESULT([found at least one!])
-      else
-        AC_MSG_ERROR([Could not find any builddeps.conf at all!])
-      fi
-    fi
-    # Create build and target names that use _ instead of "-" and ".".
-    # This is necessary to use them in variable names.
-    build_var=`echo ${OPENJDK_BUILD_AUTOCONF_NAME} | tr '-' '_' | tr '.' '_'`
-    target_var=`echo ${OPENJDK_TARGET_AUTOCONF_NAME} | tr '-' '_' | tr '.' '_'`
-    # Extract rewrite information for build and target
-    eval rewritten_build=\${REWRITE_${build_var}}
-    if test "x$rewritten_build" = x; then
-      rewritten_build=${OPENJDK_BUILD_AUTOCONF_NAME}
-      echo Build stays the same $rewritten_build
-    else
-      echo Rewriting build for builddeps into $rewritten_build
-    fi
-    eval rewritten_target=\${REWRITE_${target_var}}
-    if test "x$rewritten_target" = x; then
-      rewritten_target=${OPENJDK_TARGET_AUTOCONF_NAME}
-      echo Target stays the same $rewritten_target
-    else
-      echo Rewriting target for builddeps into $rewritten_target
-    fi
-    rewritten_build_var=`echo ${rewritten_build} | tr '-' '_' | tr '.' '_'`
-    rewritten_target_var=`echo ${rewritten_target} | tr '-' '_' | tr '.' '_'`
-  fi
-  AC_CHECK_PROGS(BDEPS_UNZIP, [7z unzip])
-  if test "x$BDEPS_UNZIP" = x7z; then
-    BDEPS_UNZIP="7z x"
-  fi
-
-  AC_CHECK_PROGS(BDEPS_FTP, [wget lftp ftp])
-])
-
-AC_DEFUN([BDEPS_FTPGET],
-[
-  # $1 is the ftp://abuilddeps.server.com/libs/cups.zip
-  # $2 is the local file name for the downloaded file.
-  VALID_TOOL=no
-  if test "x$BDEPS_FTP" = xwget; then
-    VALID_TOOL=yes
-    wget -O $2 $1
-  fi
-  if test "x$BDEPS_FTP" = xlftp; then
-    VALID_TOOL=yes
-    lftp -c "get $1 -o $2"
-  fi
-  if test "x$BDEPS_FTP" = xftp; then
-    VALID_TOOL=yes
-    FTPSERVER=`echo $1 | cut -f 3 -d '/'`
-    FTPPATH=`echo $1 | cut -f 4- -d '/'`
-    FTPUSERPWD=${FTPSERVER%%@*}
-    if test "x$FTPSERVER" != "x$FTPUSERPWD"; then
-      FTPUSER=${userpwd%%:*}
-      FTPPWD=${userpwd#*@}
-      FTPSERVER=${FTPSERVER#*@}
-    else
-      FTPUSER=ftp
-      FTPPWD=ftp
-    fi
-    # the "pass" command does not work on some
-    # ftp clients (read ftp.exe) but if it works,
-    # passive mode is better!
-    ( \
-        echo "user $FTPUSER $FTPPWD"        ; \
-        echo "pass"                         ; \
-        echo "bin"                          ; \
-        echo "get $FTPPATH $2"              ; \
-    ) | ftp -in $FTPSERVER
-  fi
-  if test "x$VALID_TOOL" != xyes; then
-    AC_MSG_ERROR([I do not know how to use the tool: $BDEPS_FTP])
-  fi
-])
-
-AC_DEFUN([BDEPS_CHECK_MODULE],
-[
-  define([LIST_OF_BUILD_DEPENDENCIES],LIST_OF_BUILD_DEPENDENCIES[$2=$3'\n'])
-  if test "x$with_builddeps_server" != x || test "x$with_builddeps_conf" != x; then
-    # Source the builddeps file again, to make sure it uses the latest variables!
-    . $builddepsfile
-    # Look for a target and build machine specific resource!
-    eval resource=\${builddep_$2_BUILD_${rewritten_build_var}_TARGET_${rewritten_target_var}}
-    if test "x$resource" = x; then
-      # Ok, lets instead look for a target specific resource
-      eval resource=\${builddep_$2_TARGET_${rewritten_target_var}}
-    fi
-    if test "x$resource" = x; then
-      # Ok, lets instead look for a build specific resource
-      eval resource=\${builddep_$2_BUILD_${rewritten_build_var}}
-    fi
-    if test "x$resource" = x; then
-      # Ok, lets instead look for a generic resource
-      # (The $2 comes from M4 and not the shell, thus no need for eval here.)
-      resource=${builddep_$2}
-    fi
-    if test "x$resource" != x; then
-      AC_MSG_NOTICE([Using builddeps $resource for $2])
-      # If the resource in the builddeps.conf file is an existing directory,
-      # for example /java/linux/cups
-      if test -d ${resource}; then
-        depdir=${resource}
-      else
-        BDEPS_FETCH($2, $resource, $with_builddeps_server, $with_builddeps_dir, depdir)
-      fi
-      # Source the builddeps file again, because in the previous command, the depdir
-      # was updated to point at the current build dependency install directory.
-      . $builddepsfile
-      # Now extract variables from the builddeps.conf files.
-      theroot=${builddep_$2_ROOT}
-      thecflags=${builddep_$2_CFLAGS}
-      thelibs=${builddep_$2_LIBS}
-      if test "x$depdir" = x; then
-        AC_MSG_ERROR([Could not download build dependency $2])
-      fi
-      $1=$depdir
-      if test "x$theroot" != x; then
-        $1="$theroot"
-      fi
-      if test "x$thecflags" != x; then
-        $1_CFLAGS="$thecflags"
-      fi
-      if test "x$thelibs" != x; then
-        $1_LIBS="$thelibs"
-      fi
-      m4_default([$4], [:])
-      m4_ifvaln([$5], [else $5])
-    fi
-    m4_ifvaln([$5], [else $5])
-  fi
-])
-
-AC_DEFUN([BDEPS_FETCH],
-[
-  # $1 is for example mymodule
-  # $2 is for example libs/general/libmymod_1_2_3.zip
-  # $3 is for example ftp://mybuilddeps.myserver.com/builddeps
-  # $4 is for example /localhome/builddeps
-  # $5 is the name of the variable into which we store the depdir, eg MYMOD
-  # Will download ftp://mybuilddeps.myserver.com/builddeps/libs/general/libmymod_1_2_3.zip and
-  # unzip into the directory: /localhome/builddeps/libmymod_1_2_3
-  filename=`basename $2`
-  filebase=`echo $filename | sed 's/\.[[^\.]]*$//'`
-  filebase=${filename%%.*}
-  extension=${filename#*.}
-  installdir=$4/$filebase
-  if test ! -f $installdir/$filename.unpacked; then
-    AC_MSG_NOTICE([Downloading build dependency $1 from $3/$2 and installing into $installdir])
-    if test ! -d $installdir; then
-      mkdir -p $installdir
-    fi
-    if test ! -d $installdir; then
-      AC_MSG_ERROR([Could not create directory $installdir])
-    fi
-    tmpfile=`mktemp $installdir/$1.XXXXXXXXX`
-    touch $tmpfile
-    if test ! -f $tmpfile; then
-      AC_MSG_ERROR([Could not create files in directory $installdir])
-    fi
-    BDEPS_FTPGET([$3/$2] , [$tmpfile])
-    mv $tmpfile $installdir/$filename
-    if test ! -s $installdir/$filename; then
-      AC_MSG_ERROR([Could not download $3/$2])
-    fi
-    case "$extension" in
-      zip)  echo "Unzipping $installdir/$filename..."
-        (cd $installdir ; rm -f $installdir/$filename.unpacked ; $BDEPS_UNZIP $installdir/$filename > /dev/null && touch $installdir/$filename.unpacked)
-        ;;
-      tar.gz) echo "Untaring $installdir/$filename..."
-        (cd $installdir ; rm -f $installdir/$filename.unpacked ; tar xzf $installdir/$filename && touch $installdir/$filename.unpacked)
-        ;;
-      tgz) echo "Untaring $installdir/$filename..."
-        (cd $installdir ; rm -f $installdir/$filename.unpacked ; tar xzf $installdir/$filename && touch $installdir/$filename.unpacked)
-        ;;
-      *) AC_MSG_ERROR([Cannot handle build depency archive with extension $extension])
-        ;;
-    esac
-  fi
-  if test -f $installdir/$filename.unpacked; then
-    $5=$installdir
-  fi
-])
-
-AC_DEFUN_ONCE([BDEPS_CONFIGURE_BUILDDEPS],
-[
-  AC_ARG_WITH(builddeps-conf, [AS_HELP_STRING([--with-builddeps-conf],
-      [use this configuration file for the builddeps])])
-
-  AC_ARG_WITH(builddeps-server, [AS_HELP_STRING([--with-builddeps-server],
-      [download and use build dependencies from this server url])])
-
-  AC_ARG_WITH(builddeps-dir, [AS_HELP_STRING([--with-builddeps-dir],
-      [store downloaded build dependencies here @<:@/localhome/builddeps@:>@])],
-      [],
-      [with_builddeps_dir=/localhome/builddeps])
-
-  AC_ARG_WITH(builddeps-group, [AS_HELP_STRING([--with-builddeps-group],
-      [chgrp the downloaded build dependencies to this group])])
-])
--- a/common/autoconf/configure.ac	Tue Oct 06 12:51:53 2015 -0700
+++ b/common/autoconf/configure.ac	Mon Oct 12 14:44:02 2015 -0700
@@ -39,7 +39,6 @@
 # Include these first...
 m4_include([basics.m4])
 m4_include([basics_windows.m4])
-m4_include([builddeps.m4])
 # ... then the rest
 m4_include([boot-jdk.m4])
 m4_include([build-performance.m4])
@@ -121,12 +120,6 @@
 # After basic tools have been setup, we can check build os specific details.
 PLATFORM_SETUP_OPENJDK_BUILD_OS_VERSION
 
-# Setup builddeps, for automatic downloading of tools we need.
-# This is needed before we can call BDEPS_CHECK_MODULE, which is done in
-# boot-jdk setup, but we need to have basic tools setup first.
-BDEPS_CONFIGURE_BUILDDEPS
-BDEPS_SCAN_FOR_BUILDDEPS
-
 ###############################################################################
 #
 # Determine OpenJDK variants, options and version numbers.
@@ -211,14 +204,8 @@
 # After we have toolchain, we can compile fixpath. It's needed by the lib checks.
 BASIC_COMPILE_FIXPATH
 
-LIB_SETUP_INIT
-LIB_SETUP_X11
-LIB_SETUP_CUPS
-LIB_SETUP_FREETYPE
-LIB_SETUP_ALSA
-LIB_SETUP_MISC_LIBS
-LIB_SETUP_STATIC_LINK_LIBSTDCPP
-LIB_SETUP_ON_WINDOWS
+LIB_DETERMINE_DEPENDENCIES
+LIB_SETUP_LIBRARIES
 
 ###############################################################################
 #
--- a/common/autoconf/generated-configure.sh	Tue Oct 06 12:51:53 2015 -0700
+++ b/common/autoconf/generated-configure.sh	Mon Oct 12 14:44:02 2015 -0700
@@ -645,28 +645,24 @@
 ENABLE_INTREE_EC
 SALIB_NAME
 HOTSPOT_MAKE_ARGS
-MSVCP_DLL
-MSVCR_DLL
-LIBCXX
+LIBZIP_CAN_USE_MMAP
+LIBDL
+LIBM
+USE_EXTERNAL_LCMS
+LCMS_LIBS
+LCMS_CFLAGS
+USE_EXTERNAL_LIBZ
+USE_EXTERNAL_LIBPNG
+PNG_LIBS
+PNG_CFLAGS
+USE_EXTERNAL_LIBGIF
+USE_EXTERNAL_LIBJPEG
 LLVM_LIBS
 LLVM_LDFLAGS
 LLVM_CFLAGS
 LLVM_CONFIG
 LIBFFI_LIBS
 LIBFFI_CFLAGS
-STATIC_CXX_SETTING
-LIBDL
-LIBM
-LIBZIP_CAN_USE_MMAP
-USE_EXTERNAL_LIBZ
-USE_EXTERNAL_LIBPNG
-PNG_LIBS
-PNG_CFLAGS
-USE_EXTERNAL_LCMS
-LCMS_LIBS
-LCMS_CFLAGS
-USE_EXTERNAL_LIBGIF
-USE_EXTERNAL_LIBJPEG
 ALSA_LIBS
 ALSA_CFLAGS
 FREETYPE_BUNDLE_LIB_PATH
@@ -678,6 +674,10 @@
 X_PRE_LIBS
 X_CFLAGS
 XMKMF
+MSVCP_DLL
+MSVCR_DLL
+LIBCXX
+STATIC_CXX_SETTING
 FIXPATH
 GCOV_ENABLED
 ZIP_DEBUGINFO_FILES
@@ -849,8 +849,6 @@
 BUILD_HEADLESS
 SUPPORT_HEADFUL
 SUPPORT_HEADLESS
-BDEPS_FTP
-BDEPS_UNZIP
 OS_VERSION_MICRO
 OS_VERSION_MINOR
 OS_VERSION_MAJOR
@@ -948,6 +946,7 @@
 build_vendor
 build_cpu
 build
+NICE
 CPIO
 DF
 READLINK
@@ -1054,10 +1053,6 @@
 with_sdk_name
 with_conf_name
 with_output_sync
-with_builddeps_conf
-with_builddeps_server
-with_builddeps_dir
-with_builddeps_group
 enable_headful
 enable_hotspot_test_in_build
 with_cacerts_file
@@ -1089,6 +1084,9 @@
 enable_debug_symbols
 enable_zip_debug_info
 enable_native_coverage
+with_stdc__lib
+with_msvcr_dll
+with_msvcp_dll
 with_x
 with_cups
 with_cups_include
@@ -1100,14 +1098,14 @@
 with_alsa
 with_alsa_include
 with_alsa_lib
+with_libffi
+with_libffi_include
+with_libffi_lib
 with_libjpeg
 with_giflib
-with_lcms
 with_libpng
 with_zlib
-with_stdc__lib
-with_msvcr_dll
-with_msvcp_dll
+with_lcms
 with_dxsdk
 with_dxsdk_lib
 with_dxsdk_include
@@ -1169,6 +1167,7 @@
 READLINK
 DF
 CPIO
+NICE
 UNZIP
 ZIP
 LDD
@@ -1215,12 +1214,12 @@
 FREETYPE_LIBS
 ALSA_CFLAGS
 ALSA_LIBS
+LIBFFI_CFLAGS
+LIBFFI_LIBS
+PNG_CFLAGS
+PNG_LIBS
 LCMS_CFLAGS
 LCMS_LIBS
-PNG_CFLAGS
-PNG_LIBS
-LIBFFI_CFLAGS
-LIBFFI_LIBS
 CCACHE'
 
 
@@ -1898,13 +1897,6 @@
                           from important configuration options]
   --with-output-sync      set make output sync type if supported by make.
                           [recurse]
-  --with-builddeps-conf   use this configuration file for the builddeps
-  --with-builddeps-server download and use build dependencies from this server
-                          url
-  --with-builddeps-dir    store downloaded build dependencies here
-                          [/localhome/builddeps]
-  --with-builddeps-group  chgrp the downloaded build dependencies to this
-                          group
   --with-cacerts-file     specify alternative cacerts file
   --with-milestone        Set milestone value for build [internal]
   --with-update-version   Set update version value for build [b00]
@@ -1947,6 +1939,14 @@
                           '--help' to show possible values [platform
                           dependent]
   --with-jtreg            Regression Test Harness [probed]
+  --with-stdc++lib=<static>,<dynamic>,<default>
+                          force linking of the C++ runtime on Linux to either
+                          static or dynamic, default is static with dynamic as
+                          fallback
+  --with-msvcr-dll        path to microsoft C runtime dll (msvcr*.dll)
+                          (Windows only) [probed]
+  --with-msvcp-dll        path to microsoft C++ runtime dll (msvcp*.dll)
+                          (Windows only) [probed]
   --with-x                use the X Window System
   --with-cups             specify prefix directory for the cups package
                           (expecting the headers under PATH/include)
@@ -1964,24 +1964,21 @@
                           headers under PATH/include)
   --with-alsa-include     specify directory for the alsa include files
   --with-alsa-lib         specify directory for the alsa library
+  --with-libffi           specify prefix directory for the libffi package
+                          (expecting the libraries under PATH/lib and the
+                          headers under PATH/include)
+  --with-libffi-include   specify directory for the libffi include files
+  --with-libffi-lib       specify directory for the libffi library
   --with-libjpeg          use libjpeg from build system or OpenJDK source
                           (system, bundled) [bundled]
   --with-giflib           use giflib from build system or OpenJDK source
                           (system, bundled) [bundled]
-  --with-lcms             use lcms2 from build system or OpenJDK source
-                          (system, bundled) [bundled]
   --with-libpng           use libpng from build system or OpenJDK source
                           (system, bundled) [bundled]
   --with-zlib             use zlib from build system or OpenJDK source
                           (system, bundled) [bundled]
-  --with-stdc++lib=<static>,<dynamic>,<default>
-                          force linking of the C++ runtime on Linux to either
-                          static or dynamic, default is static with dynamic as
-                          fallback
-  --with-msvcr-dll        path to microsoft C runtime dll (msvcr*.dll)
-                          (Windows only) [probed]
-  --with-msvcp-dll        path to microsoft C++ runtime dll (msvcp*.dll)
-                          (Windows only) [probed]
+  --with-lcms             use lcms2 from build system or OpenJDK source
+                          (system, bundled) [bundled]
   --with-dxsdk            Deprecated. Option is kept for backwards
                           compatibility and is ignored
   --with-dxsdk-lib        Deprecated. Option is kept for backwards
@@ -2049,6 +2046,7 @@
   READLINK    Override default value for READLINK
   DF          Override default value for DF
   CPIO        Override default value for CPIO
+  NICE        Override default value for NICE
   UNZIP       Override default value for UNZIP
   ZIP         Override default value for ZIP
   LDD         Override default value for LDD
@@ -2098,13 +2096,13 @@
               linker flags for FREETYPE, overriding pkg-config
   ALSA_CFLAGS C compiler flags for ALSA, overriding pkg-config
   ALSA_LIBS   linker flags for ALSA, overriding pkg-config
-  LCMS_CFLAGS C compiler flags for LCMS, overriding pkg-config
-  LCMS_LIBS   linker flags for LCMS, overriding pkg-config
-  PNG_CFLAGS  C compiler flags for PNG, overriding pkg-config
-  PNG_LIBS    linker flags for PNG, overriding pkg-config
   LIBFFI_CFLAGS
               C compiler flags for LIBFFI, overriding pkg-config
   LIBFFI_LIBS linker flags for LIBFFI, overriding pkg-config
+  PNG_CFLAGS  C compiler flags for PNG, overriding pkg-config
+  PNG_LIBS    linker flags for PNG, overriding pkg-config
+  LCMS_CFLAGS C compiler flags for LCMS, overriding pkg-config
+  LCMS_LIBS   linker flags for LCMS, overriding pkg-config
   CCACHE      Override default value for CCACHE
 
 Use these variables to override the choices made by `configure' or to help
@@ -3559,41 +3557,6 @@
 
 
 
-#
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
-# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-#
-# This code is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License version 2 only, as
-# published by the Free Software Foundation.  Oracle designates this
-# particular file as subject to the "Classpath" exception as provided
-# by Oracle in the LICENSE file that accompanied this code.
-#
-# This code is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-# version 2 for more details (a copy is included in the LICENSE file that
-# accompanied this code).
-#
-# You should have received a copy of the GNU General Public License version
-# 2 along with this work; if not, write to the Free Software Foundation,
-# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-# or visit www.oracle.com if you need additional information or have any
-# questions.
-#
-
-
-
-
-
-
-
-
-
-
-
 # ... then the rest
 #
 # Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
@@ -3656,9 +3619,6 @@
 # Test: Is bootjdk explicitely set by command line arguments?
 
 
-# Test: Is bootjdk available from builddeps?
-
-
 # Test: Is $JAVA_HOME set?
 
 
@@ -3832,7 +3792,7 @@
 
 
 #
-# Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -3909,8 +3869,8 @@
       PKGHANDLER_COMMAND="sudo apt-get install libcups2-dev" ;;
     freetype)
       PKGHANDLER_COMMAND="sudo apt-get install libfreetype6-dev" ;;
-    pulse)
-      PKGHANDLER_COMMAND="sudo apt-get install libpulse-dev" ;;
+    ffi)
+      PKGHANDLER_COMMAND="sudo apt-get install libffi-dev" ;;
     x11)
       PKGHANDLER_COMMAND="sudo apt-get install libX11-dev libxext-dev libxrender-dev libxtst-dev libxt-dev" ;;
     ccache)
@@ -3930,8 +3890,6 @@
       PKGHANDLER_COMMAND="sudo yum install cups-devel" ;;
     freetype)
       PKGHANDLER_COMMAND="sudo yum install freetype-devel" ;;
-    pulse)
-      PKGHANDLER_COMMAND="sudo yum install pulseaudio-libs-devel" ;;
     x11)
       PKGHANDLER_COMMAND="sudo yum install libXtst-devel libXt-devel libXrender-devel libXi-devel" ;;
     ccache)
@@ -4020,7 +3978,7 @@
 
 
 #
-# Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -4044,24 +4002,278 @@
 # questions.
 #
 
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+# Major library component reside in separate files.
+#
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup alsa (Advanced Linux Sound Architecture)
+################################################################################
+
+
+#
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup bundled libraries.
+#
+# For libjpeg, giflib, libpng, lcms2 and zlib, the source is present in the
+# OpenJDK repository. Default is to use these libraries as bundled, but they
+# might be replaced by en external version by the user.
+################################################################################
+
+
+################################################################################
+# Setup libjpeg
+################################################################################
+
+
+################################################################################
+# Setup giflib
+################################################################################
+
+
+################################################################################
+# Setup libpng
+################################################################################
+
+
+################################################################################
+# Setup zlib
+################################################################################
+
+
+################################################################################
+# Setup lcms (Little CMS)
+################################################################################
+
+
+#
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup cups (Common Unix Printing System)
+################################################################################
+
+
+#
+# Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup libffi (Foreign Function Interface)
+################################################################################
+
+
+#
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Build the freetype lib from source
+################################################################################
+
+
+################################################################################
+# Check if a potential freeype library match is correct and usable
+################################################################################
+
+
+################################################################################
+# Setup freetype (The FreeType2 font rendering library)
+################################################################################
+
+
+#
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup the standard C/C++ runtime libraries.
+#
+# Most importantly, determine if stdc++ should be linked statically or
+# dynamically.
+################################################################################
+
+
+#
+# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup X11 Windows system
+################################################################################
+
+
+
+################################################################################
+# Determine which libraries are needed for this configuration
+################################################################################
+
+
+################################################################################
+# Parse library options, and setup needed libraries
+################################################################################
+
+
+################################################################################
+# Setup llvm (Low-Level VM)
+################################################################################
+
+
+################################################################################
+# Setup various libraries, typically small system libraries
+################################################################################
 
 
 #
@@ -4375,7 +4587,7 @@
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1444077934
+DATE_WHEN_GENERATED=1444643341
 
 ###############################################################################
 #
@@ -4421,9 +4633,7 @@
 
   # Start with tools that do not need have cross compilation support
   # and can be expected to be found in the default PATH. These tools are
-  # used by configure. Nor are these tools expected to be found in the
-  # devkit from the builddeps server either, since they are
-  # needed to download the devkit.
+  # used by configure.
 
   # First are all the simple required tools.
 
@@ -4432,7 +4642,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$BASENAME" = x; then
+  if [ -z "${BASENAME+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in basename
 do
@@ -4545,14 +4755,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$BASENAME"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BASENAME=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$BASENAME" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool BASENAME= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool BASENAME= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASENAME" >&5
+$as_echo_n "checking for BASENAME... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$BASENAME"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BASENAME=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool BASENAME=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -4592,22 +4811,23 @@
 fi
 
 
-        if test "x$BASENAME" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BASENAME=$tool_specified" >&5
+          if test "x$BASENAME" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BASENAME=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool BASENAME=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASENAME" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASENAME" >&5
 $as_echo_n "checking for BASENAME... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool BASENAME=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool BASENAME=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -4625,7 +4845,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$BASH" = x; then
+  if [ -z "${BASH+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in bash
 do
@@ -4738,14 +4958,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$BASH"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BASH=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$BASH" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool BASH= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool BASH= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASH" >&5
+$as_echo_n "checking for BASH... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$BASH"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BASH=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool BASH=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -4785,22 +5014,23 @@
 fi
 
 
-        if test "x$BASH" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BASH=$tool_specified" >&5
+          if test "x$BASH" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BASH=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool BASH=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASH" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASH" >&5
 $as_echo_n "checking for BASH... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool BASH=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool BASH=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -4818,7 +5048,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$CAT" = x; then
+  if [ -z "${CAT+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cat
 do
@@ -4931,14 +5161,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CAT"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CAT=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CAT" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CAT= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CAT= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CAT" >&5
+$as_echo_n "checking for CAT... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CAT"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CAT=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CAT=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -4978,22 +5217,23 @@
 fi
 
 
-        if test "x$CAT" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CAT=$tool_specified" >&5
+          if test "x$CAT" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CAT=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CAT=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CAT" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CAT" >&5
 $as_echo_n "checking for CAT... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CAT=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CAT=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -5011,7 +5251,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$CHMOD" = x; then
+  if [ -z "${CHMOD+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in chmod
 do
@@ -5124,14 +5364,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CHMOD"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CHMOD=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CHMOD" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CHMOD= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CHMOD= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CHMOD" >&5
+$as_echo_n "checking for CHMOD... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CHMOD"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CHMOD=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CHMOD=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -5171,22 +5420,23 @@
 fi
 
 
-        if test "x$CHMOD" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CHMOD=$tool_specified" >&5
+          if test "x$CHMOD" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CHMOD=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CHMOD=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CHMOD" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CHMOD" >&5
 $as_echo_n "checking for CHMOD... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CHMOD=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CHMOD=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -5204,7 +5454,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$CMP" = x; then
+  if [ -z "${CMP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cmp
 do
@@ -5317,14 +5567,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CMP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CMP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CMP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CMP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CMP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CMP" >&5
+$as_echo_n "checking for CMP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CMP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CMP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CMP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -5364,22 +5623,23 @@
 fi
 
 
-        if test "x$CMP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CMP=$tool_specified" >&5
+          if test "x$CMP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CMP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CMP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CMP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CMP" >&5
 $as_echo_n "checking for CMP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CMP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CMP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -5397,7 +5657,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$COMM" = x; then
+  if [ -z "${COMM+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in comm
 do
@@ -5510,14 +5770,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$COMM"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool COMM=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$COMM" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool COMM= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool COMM= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for COMM" >&5
+$as_echo_n "checking for COMM... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$COMM"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool COMM=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool COMM=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -5557,22 +5826,23 @@
 fi
 
 
-        if test "x$COMM" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool COMM=$tool_specified" >&5
+          if test "x$COMM" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool COMM=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool COMM=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for COMM" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for COMM" >&5
 $as_echo_n "checking for COMM... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool COMM=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool COMM=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -5590,7 +5860,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$CP" = x; then
+  if [ -z "${CP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cp
 do
@@ -5703,14 +5973,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CP" >&5
+$as_echo_n "checking for CP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -5750,22 +6029,23 @@
 fi
 
 
-        if test "x$CP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CP=$tool_specified" >&5
+          if test "x$CP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CP" >&5
 $as_echo_n "checking for CP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -5783,7 +6063,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$CUT" = x; then
+  if [ -z "${CUT+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cut
 do
@@ -5896,14 +6176,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CUT"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CUT=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CUT" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CUT= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CUT= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CUT" >&5
+$as_echo_n "checking for CUT... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CUT"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CUT=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CUT=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -5943,22 +6232,23 @@
 fi
 
 
-        if test "x$CUT" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CUT=$tool_specified" >&5
+          if test "x$CUT" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CUT=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CUT=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CUT" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CUT" >&5
 $as_echo_n "checking for CUT... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CUT=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CUT=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -5976,7 +6266,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$DATE" = x; then
+  if [ -z "${DATE+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in date
 do
@@ -6089,14 +6379,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$DATE"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DATE=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$DATE" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool DATE= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool DATE= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DATE" >&5
+$as_echo_n "checking for DATE... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$DATE"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DATE=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool DATE=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -6136,22 +6435,23 @@
 fi
 
 
-        if test "x$DATE" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DATE=$tool_specified" >&5
+          if test "x$DATE" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DATE=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool DATE=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DATE" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DATE" >&5
 $as_echo_n "checking for DATE... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool DATE=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool DATE=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -6169,7 +6469,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$DIFF" = x; then
+  if [ -z "${DIFF+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in gdiff diff
 do
@@ -6282,14 +6582,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$DIFF"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DIFF=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$DIFF" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool DIFF= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool DIFF= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIFF" >&5
+$as_echo_n "checking for DIFF... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$DIFF"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DIFF=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool DIFF=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -6329,22 +6638,23 @@
 fi
 
 
-        if test "x$DIFF" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DIFF=$tool_specified" >&5
+          if test "x$DIFF" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DIFF=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool DIFF=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIFF" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIFF" >&5
 $as_echo_n "checking for DIFF... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool DIFF=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool DIFF=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -6362,7 +6672,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$DIRNAME" = x; then
+  if [ -z "${DIRNAME+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in dirname
 do
@@ -6475,14 +6785,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$DIRNAME"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DIRNAME=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$DIRNAME" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool DIRNAME= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool DIRNAME= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIRNAME" >&5
+$as_echo_n "checking for DIRNAME... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$DIRNAME"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DIRNAME=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool DIRNAME=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -6522,22 +6841,23 @@
 fi
 
 
-        if test "x$DIRNAME" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DIRNAME=$tool_specified" >&5
+          if test "x$DIRNAME" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DIRNAME=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool DIRNAME=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIRNAME" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIRNAME" >&5
 $as_echo_n "checking for DIRNAME... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool DIRNAME=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool DIRNAME=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -6555,7 +6875,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$ECHO" = x; then
+  if [ -z "${ECHO+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in echo
 do
@@ -6668,14 +6988,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$ECHO"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool ECHO=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$ECHO" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool ECHO= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool ECHO= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ECHO" >&5
+$as_echo_n "checking for ECHO... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$ECHO"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool ECHO=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool ECHO=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -6715,22 +7044,23 @@
 fi
 
 
-        if test "x$ECHO" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool ECHO=$tool_specified" >&5
+          if test "x$ECHO" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool ECHO=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool ECHO=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ECHO" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ECHO" >&5
 $as_echo_n "checking for ECHO... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool ECHO=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool ECHO=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -6748,7 +7078,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$EXPR" = x; then
+  if [ -z "${EXPR+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in expr
 do
@@ -6861,14 +7191,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$EXPR"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool EXPR=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$EXPR" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool EXPR= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool EXPR= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EXPR" >&5
+$as_echo_n "checking for EXPR... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$EXPR"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool EXPR=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool EXPR=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -6908,22 +7247,23 @@
 fi
 
 
-        if test "x$EXPR" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool EXPR=$tool_specified" >&5
+          if test "x$EXPR" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool EXPR=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool EXPR=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EXPR" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EXPR" >&5
 $as_echo_n "checking for EXPR... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool EXPR=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool EXPR=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -6941,7 +7281,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$FILE" = x; then
+  if [ -z "${FILE+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in file
 do
@@ -7054,14 +7394,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$FILE"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FILE=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$FILE" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool FILE= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool FILE= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FILE" >&5
+$as_echo_n "checking for FILE... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$FILE"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FILE=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool FILE=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -7101,22 +7450,23 @@
 fi
 
 
-        if test "x$FILE" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FILE=$tool_specified" >&5
+          if test "x$FILE" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FILE=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool FILE=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FILE" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FILE" >&5
 $as_echo_n "checking for FILE... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool FILE=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool FILE=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -7134,7 +7484,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$FIND" = x; then
+  if [ -z "${FIND+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in find
 do
@@ -7247,14 +7597,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$FIND"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FIND=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$FIND" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool FIND= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool FIND= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FIND" >&5
+$as_echo_n "checking for FIND... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$FIND"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FIND=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool FIND=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -7294,22 +7653,23 @@
 fi
 
 
-        if test "x$FIND" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FIND=$tool_specified" >&5
+          if test "x$FIND" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FIND=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool FIND=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FIND" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FIND" >&5
 $as_echo_n "checking for FIND... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool FIND=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool FIND=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -7327,7 +7687,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$HEAD" = x; then
+  if [ -z "${HEAD+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in head
 do
@@ -7440,14 +7800,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$HEAD"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool HEAD=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$HEAD" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool HEAD= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool HEAD= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HEAD" >&5
+$as_echo_n "checking for HEAD... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$HEAD"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool HEAD=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool HEAD=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -7487,22 +7856,23 @@
 fi
 
 
-        if test "x$HEAD" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool HEAD=$tool_specified" >&5
+          if test "x$HEAD" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool HEAD=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool HEAD=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HEAD" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HEAD" >&5
 $as_echo_n "checking for HEAD... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool HEAD=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool HEAD=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -7520,7 +7890,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$LN" = x; then
+  if [ -z "${LN+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in ln
 do
@@ -7633,14 +8003,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$LN"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LN=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$LN" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool LN= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool LN= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LN" >&5
+$as_echo_n "checking for LN... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$LN"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LN=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool LN=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -7680,22 +8059,23 @@
 fi
 
 
-        if test "x$LN" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LN=$tool_specified" >&5
+          if test "x$LN" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LN=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool LN=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LN" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LN" >&5
 $as_echo_n "checking for LN... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool LN=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool LN=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -7713,7 +8093,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$LS" = x; then
+  if [ -z "${LS+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in ls
 do
@@ -7826,14 +8206,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$LS"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LS=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$LS" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool LS= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool LS= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LS" >&5
+$as_echo_n "checking for LS... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$LS"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LS=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool LS=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -7873,22 +8262,23 @@
 fi
 
 
-        if test "x$LS" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LS=$tool_specified" >&5
+          if test "x$LS" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LS=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool LS=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LS" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LS" >&5
 $as_echo_n "checking for LS... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool LS=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool LS=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -7906,7 +8296,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$MKDIR" = x; then
+  if [ -z "${MKDIR+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in mkdir
 do
@@ -8019,14 +8409,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$MKDIR"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MKDIR=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$MKDIR" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool MKDIR= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool MKDIR= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKDIR" >&5
+$as_echo_n "checking for MKDIR... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$MKDIR"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MKDIR=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool MKDIR=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -8066,22 +8465,23 @@
 fi
 
 
-        if test "x$MKDIR" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MKDIR=$tool_specified" >&5
+          if test "x$MKDIR" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MKDIR=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool MKDIR=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKDIR" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKDIR" >&5
 $as_echo_n "checking for MKDIR... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool MKDIR=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool MKDIR=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -8099,7 +8499,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$MKTEMP" = x; then
+  if [ -z "${MKTEMP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in mktemp
 do
@@ -8212,14 +8612,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$MKTEMP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MKTEMP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$MKTEMP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool MKTEMP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool MKTEMP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKTEMP" >&5
+$as_echo_n "checking for MKTEMP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$MKTEMP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MKTEMP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool MKTEMP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -8259,22 +8668,23 @@
 fi
 
 
-        if test "x$MKTEMP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MKTEMP=$tool_specified" >&5
+          if test "x$MKTEMP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MKTEMP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool MKTEMP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKTEMP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKTEMP" >&5
 $as_echo_n "checking for MKTEMP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool MKTEMP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool MKTEMP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -8292,7 +8702,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$MV" = x; then
+  if [ -z "${MV+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in mv
 do
@@ -8405,14 +8815,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$MV"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MV=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$MV" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool MV= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool MV= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MV" >&5
+$as_echo_n "checking for MV... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$MV"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MV=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool MV=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -8452,22 +8871,23 @@
 fi
 
 
-        if test "x$MV" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MV=$tool_specified" >&5
+          if test "x$MV" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MV=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool MV=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MV" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MV" >&5
 $as_echo_n "checking for MV... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool MV=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool MV=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -8485,7 +8905,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$NAWK" = x; then
+  if [ -z "${NAWK+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in nawk gawk awk
 do
@@ -8598,14 +9018,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$NAWK"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NAWK=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$NAWK" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool NAWK= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool NAWK= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NAWK" >&5
+$as_echo_n "checking for NAWK... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$NAWK"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NAWK=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool NAWK=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -8645,22 +9074,23 @@
 fi
 
 
-        if test "x$NAWK" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NAWK=$tool_specified" >&5
+          if test "x$NAWK" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NAWK=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool NAWK=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NAWK" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NAWK" >&5
 $as_echo_n "checking for NAWK... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool NAWK=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool NAWK=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -8678,7 +9108,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$PRINTF" = x; then
+  if [ -z "${PRINTF+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in printf
 do
@@ -8791,14 +9221,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$PRINTF"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool PRINTF=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$PRINTF" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool PRINTF= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool PRINTF= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PRINTF" >&5
+$as_echo_n "checking for PRINTF... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$PRINTF"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool PRINTF=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool PRINTF=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -8838,22 +9277,23 @@
 fi
 
 
-        if test "x$PRINTF" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool PRINTF=$tool_specified" >&5
+          if test "x$PRINTF" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool PRINTF=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool PRINTF=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PRINTF" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PRINTF" >&5
 $as_echo_n "checking for PRINTF... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool PRINTF=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool PRINTF=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -8871,7 +9311,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$RM" = x; then
+  if [ -z "${RM+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in rm
 do
@@ -8984,14 +9424,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$RM"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool RM=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$RM" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool RM= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool RM= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for RM" >&5
+$as_echo_n "checking for RM... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$RM"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool RM=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool RM=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -9031,22 +9480,23 @@
 fi
 
 
-        if test "x$RM" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool RM=$tool_specified" >&5
+          if test "x$RM" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool RM=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool RM=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for RM" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for RM" >&5
 $as_echo_n "checking for RM... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool RM=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool RM=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -9064,7 +9514,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$SH" = x; then
+  if [ -z "${SH+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in sh
 do
@@ -9177,14 +9627,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$SH"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SH=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$SH" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool SH= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool SH= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SH" >&5
+$as_echo_n "checking for SH... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$SH"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SH=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool SH=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -9224,22 +9683,23 @@
 fi
 
 
-        if test "x$SH" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SH=$tool_specified" >&5
+          if test "x$SH" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SH=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool SH=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SH" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SH" >&5
 $as_echo_n "checking for SH... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool SH=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool SH=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -9257,7 +9717,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$SORT" = x; then
+  if [ -z "${SORT+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in sort
 do
@@ -9370,14 +9830,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$SORT"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SORT=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$SORT" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool SORT= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool SORT= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SORT" >&5
+$as_echo_n "checking for SORT... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$SORT"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SORT=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool SORT=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -9417,22 +9886,23 @@
 fi
 
 
-        if test "x$SORT" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SORT=$tool_specified" >&5
+          if test "x$SORT" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SORT=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool SORT=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SORT" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SORT" >&5
 $as_echo_n "checking for SORT... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool SORT=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool SORT=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -9450,7 +9920,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$TAIL" = x; then
+  if [ -z "${TAIL+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in tail
 do
@@ -9563,14 +10033,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$TAIL"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TAIL=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$TAIL" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool TAIL= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool TAIL= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAIL" >&5
+$as_echo_n "checking for TAIL... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$TAIL"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TAIL=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool TAIL=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -9610,22 +10089,23 @@
 fi
 
 
-        if test "x$TAIL" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TAIL=$tool_specified" >&5
+          if test "x$TAIL" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TAIL=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool TAIL=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAIL" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAIL" >&5
 $as_echo_n "checking for TAIL... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool TAIL=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool TAIL=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -9643,7 +10123,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$TAR" = x; then
+  if [ -z "${TAR+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in tar
 do
@@ -9756,14 +10236,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$TAR"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TAR=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$TAR" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool TAR= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool TAR= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAR" >&5
+$as_echo_n "checking for TAR... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$TAR"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TAR=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool TAR=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -9803,22 +10292,23 @@
 fi
 
 
-        if test "x$TAR" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TAR=$tool_specified" >&5
+          if test "x$TAR" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TAR=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool TAR=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAR" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAR" >&5
 $as_echo_n "checking for TAR... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool TAR=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool TAR=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -9836,7 +10326,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$TEE" = x; then
+  if [ -z "${TEE+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in tee
 do
@@ -9949,14 +10439,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$TEE"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TEE=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$TEE" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool TEE= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool TEE= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TEE" >&5
+$as_echo_n "checking for TEE... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$TEE"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TEE=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool TEE=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -9996,22 +10495,23 @@
 fi
 
 
-        if test "x$TEE" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TEE=$tool_specified" >&5
+          if test "x$TEE" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TEE=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool TEE=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TEE" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TEE" >&5
 $as_echo_n "checking for TEE... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool TEE=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool TEE=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -10029,7 +10529,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$TOUCH" = x; then
+  if [ -z "${TOUCH+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in touch
 do
@@ -10142,14 +10642,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$TOUCH"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TOUCH=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$TOUCH" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool TOUCH= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool TOUCH= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TOUCH" >&5
+$as_echo_n "checking for TOUCH... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$TOUCH"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TOUCH=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool TOUCH=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -10189,22 +10698,23 @@
 fi
 
 
-        if test "x$TOUCH" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TOUCH=$tool_specified" >&5
+          if test "x$TOUCH" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TOUCH=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool TOUCH=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TOUCH" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TOUCH" >&5
 $as_echo_n "checking for TOUCH... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool TOUCH=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool TOUCH=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -10222,7 +10732,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$TR" = x; then
+  if [ -z "${TR+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in tr
 do
@@ -10335,14 +10845,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$TR"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TR=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$TR" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool TR= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool TR= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TR" >&5
+$as_echo_n "checking for TR... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$TR"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TR=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool TR=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -10382,22 +10901,23 @@
 fi
 
 
-        if test "x$TR" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TR=$tool_specified" >&5
+          if test "x$TR" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TR=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool TR=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TR" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TR" >&5
 $as_echo_n "checking for TR... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool TR=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool TR=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -10415,7 +10935,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$UNAME" = x; then
+  if [ -z "${UNAME+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in uname
 do
@@ -10528,14 +11048,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$UNAME"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNAME=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$UNAME" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool UNAME= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool UNAME= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNAME" >&5
+$as_echo_n "checking for UNAME... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$UNAME"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNAME=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool UNAME=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -10575,22 +11104,23 @@
 fi
 
 
-        if test "x$UNAME" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNAME=$tool_specified" >&5
+          if test "x$UNAME" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNAME=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool UNAME=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNAME" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNAME" >&5
 $as_echo_n "checking for UNAME... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool UNAME=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool UNAME=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -10608,7 +11138,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$UNIQ" = x; then
+  if [ -z "${UNIQ+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in uniq
 do
@@ -10721,14 +11251,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$UNIQ"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNIQ=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$UNIQ" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool UNIQ= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool UNIQ= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNIQ" >&5
+$as_echo_n "checking for UNIQ... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$UNIQ"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNIQ=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool UNIQ=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -10768,22 +11307,23 @@
 fi
 
 
-        if test "x$UNIQ" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNIQ=$tool_specified" >&5
+          if test "x$UNIQ" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNIQ=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool UNIQ=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNIQ" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNIQ" >&5
 $as_echo_n "checking for UNIQ... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool UNIQ=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool UNIQ=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -10801,7 +11341,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$WC" = x; then
+  if [ -z "${WC+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in wc
 do
@@ -10914,14 +11454,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$WC"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool WC=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$WC" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool WC= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool WC= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WC" >&5
+$as_echo_n "checking for WC... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$WC"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool WC=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool WC=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -10961,22 +11510,23 @@
 fi
 
 
-        if test "x$WC" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool WC=$tool_specified" >&5
+          if test "x$WC" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool WC=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool WC=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WC" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WC" >&5
 $as_echo_n "checking for WC... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool WC=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool WC=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -10994,7 +11544,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$WHICH" = x; then
+  if [ -z "${WHICH+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in which
 do
@@ -11107,14 +11657,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$WHICH"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool WHICH=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$WHICH" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool WHICH= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool WHICH= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WHICH" >&5
+$as_echo_n "checking for WHICH... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$WHICH"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool WHICH=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool WHICH=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -11154,22 +11713,23 @@
 fi
 
 
-        if test "x$WHICH" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool WHICH=$tool_specified" >&5
+          if test "x$WHICH" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool WHICH=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool WHICH=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WHICH" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WHICH" >&5
 $as_echo_n "checking for WHICH... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool WHICH=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool WHICH=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -11187,7 +11747,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$XARGS" = x; then
+  if [ -z "${XARGS+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in xargs
 do
@@ -11300,14 +11860,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$XARGS"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool XARGS=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$XARGS" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool XARGS= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool XARGS= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XARGS" >&5
+$as_echo_n "checking for XARGS... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$XARGS"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool XARGS=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool XARGS=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -11347,22 +11916,23 @@
 fi
 
 
-        if test "x$XARGS" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool XARGS=$tool_specified" >&5
+          if test "x$XARGS" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool XARGS=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool XARGS=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XARGS" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XARGS" >&5
 $as_echo_n "checking for XARGS... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool XARGS=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool XARGS=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -11381,7 +11951,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$AWK" = x; then
+  if [ -z "${AWK+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in gawk mawk nawk awk
 do
@@ -11488,14 +12058,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$AWK"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AWK=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$AWK" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool AWK= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool AWK= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AWK" >&5
+$as_echo_n "checking for AWK... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$AWK"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AWK=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool AWK=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -11535,22 +12114,23 @@
 fi
 
 
-        if test "x$AWK" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AWK=$tool_specified" >&5
+          if test "x$AWK" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AWK=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool AWK=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AWK" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AWK" >&5
 $as_echo_n "checking for AWK... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool AWK=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool AWK=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -11566,7 +12146,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$GREP" = x; then
+  if [ -z "${GREP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }
@@ -11715,14 +12295,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$GREP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool GREP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$GREP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool GREP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool GREP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GREP" >&5
+$as_echo_n "checking for GREP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$GREP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool GREP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool GREP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -11762,22 +12351,23 @@
 fi
 
 
-        if test "x$GREP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool GREP=$tool_specified" >&5
+          if test "x$GREP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool GREP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool GREP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GREP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GREP" >&5
 $as_echo_n "checking for GREP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool GREP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool GREP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -11793,7 +12383,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$EGREP" = x; then
+  if [ -z "${EGREP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 $as_echo_n "checking for egrep... " >&6; }
@@ -11950,14 +12540,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$EGREP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool EGREP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$EGREP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool EGREP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool EGREP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EGREP" >&5
+$as_echo_n "checking for EGREP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$EGREP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool EGREP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool EGREP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -11997,22 +12596,23 @@
 fi
 
 
-        if test "x$EGREP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool EGREP=$tool_specified" >&5
+          if test "x$EGREP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool EGREP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool EGREP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EGREP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EGREP" >&5
 $as_echo_n "checking for EGREP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool EGREP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool EGREP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -12028,7 +12628,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$FGREP" = x; then
+  if [ -z "${FGREP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
 $as_echo_n "checking for fgrep... " >&6; }
@@ -12185,14 +12785,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$FGREP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FGREP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$FGREP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool FGREP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool FGREP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FGREP" >&5
+$as_echo_n "checking for FGREP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$FGREP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FGREP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool FGREP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -12232,22 +12841,23 @@
 fi
 
 
-        if test "x$FGREP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FGREP=$tool_specified" >&5
+          if test "x$FGREP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FGREP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool FGREP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FGREP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FGREP" >&5
 $as_echo_n "checking for FGREP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool FGREP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool FGREP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -12263,7 +12873,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$SED" = x; then
+  if [ -z "${SED+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
 $as_echo_n "checking for a sed that does not truncate output... " >&6; }
@@ -12424,14 +13034,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$SED"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SED=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$SED" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool SED= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool SED= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SED" >&5
+$as_echo_n "checking for SED... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$SED"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SED=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool SED=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -12471,22 +13090,23 @@
 fi
 
 
-        if test "x$SED" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SED=$tool_specified" >&5
+          if test "x$SED" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SED=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool SED=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SED" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SED" >&5
 $as_echo_n "checking for SED... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool SED=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool SED=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -12511,7 +13131,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$CYGPATH" = x; then
+  if [ -z "${CYGPATH+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cygpath
 do
@@ -12624,14 +13244,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CYGPATH"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CYGPATH=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CYGPATH" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CYGPATH= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CYGPATH= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CYGPATH" >&5
+$as_echo_n "checking for CYGPATH... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CYGPATH"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CYGPATH=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CYGPATH=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -12671,33 +13300,34 @@
 fi
 
 
-        if test "x$CYGPATH" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CYGPATH=$tool_specified" >&5
+          if test "x$CYGPATH" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CYGPATH=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CYGPATH=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CYGPATH" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CYGPATH" >&5
 $as_echo_n "checking for CYGPATH... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CYGPATH=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
-      fi
-    fi
-  fi
-
-
-
-
-  # Publish this variable in the help.
-
-
-  if test "x$READLINK" = x; then
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CYGPATH=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${READLINK+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in greadlink readlink
 do
@@ -12810,14 +13440,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$READLINK"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool READLINK=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$READLINK" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool READLINK= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool READLINK= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READLINK" >&5
+$as_echo_n "checking for READLINK... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$READLINK"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool READLINK=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool READLINK=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -12857,33 +13496,34 @@
 fi
 
 
-        if test "x$READLINK" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool READLINK=$tool_specified" >&5
+          if test "x$READLINK" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool READLINK=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool READLINK=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READLINK" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READLINK" >&5
 $as_echo_n "checking for READLINK... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool READLINK=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
-      fi
-    fi
-  fi
-
-
-
-
-  # Publish this variable in the help.
-
-
-  if test "x$DF" = x; then
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool READLINK=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${DF+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in df
 do
@@ -12996,14 +13636,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$DF"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DF=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$DF" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool DF= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool DF= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DF" >&5
+$as_echo_n "checking for DF... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$DF"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DF=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool DF=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -13043,33 +13692,34 @@
 fi
 
 
-        if test "x$DF" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DF=$tool_specified" >&5
+          if test "x$DF" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DF=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool DF=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DF" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DF" >&5
 $as_echo_n "checking for DF... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool DF=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
-      fi
-    fi
-  fi
-
-
-
-
-  # Publish this variable in the help.
-
-
-  if test "x$CPIO" = x; then
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool DF=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${CPIO+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cpio bsdcpio
 do
@@ -13182,14 +13832,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CPIO"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CPIO=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CPIO" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CPIO= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CPIO= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CPIO" >&5
+$as_echo_n "checking for CPIO... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CPIO"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CPIO=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CPIO=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -13229,22 +13888,219 @@
 fi
 
 
-        if test "x$CPIO" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CPIO=$tool_specified" >&5
+          if test "x$CPIO" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CPIO=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CPIO=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CPIO" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CPIO" >&5
 $as_echo_n "checking for CPIO... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CPIO=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CPIO=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${NICE+x}" ]; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in nice
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NICE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NICE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NICE="$NICE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NICE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NICE=$ac_cv_path_NICE
+if test -n "$NICE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NICE" >&5
+$as_echo "$NICE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$NICE" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !NICE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!NICE!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xNICE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of NICE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of NICE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in nice
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NICE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NICE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NICE="$NICE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NICE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NICE=$ac_cv_path_NICE
+if test -n "$NICE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NICE" >&5
+$as_echo "$NICE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$NICE" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if we try to supply an empty value
+      if test "x$NICE" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool NICE= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool NICE= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NICE" >&5
+$as_echo_n "checking for NICE... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$NICE"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NICE=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool NICE=$tool_basename" >&6;}
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NICE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NICE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NICE="$NICE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NICE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NICE=$ac_cv_path_NICE
+if test -n "$NICE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NICE" >&5
+$as_echo "$NICE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+          if test "x$NICE" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NICE=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool NICE=$tool_specified" >&6;}
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NICE" >&5
+$as_echo_n "checking for NICE... " >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool NICE=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -17383,7 +18239,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$UNZIP" = x; then
+  if [ -z "${UNZIP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in unzip
 do
@@ -17496,14 +18352,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$UNZIP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNZIP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$UNZIP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool UNZIP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool UNZIP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNZIP" >&5
+$as_echo_n "checking for UNZIP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$UNZIP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNZIP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool UNZIP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -17543,22 +18408,23 @@
 fi
 
 
-        if test "x$UNZIP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNZIP=$tool_specified" >&5
+          if test "x$UNZIP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNZIP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool UNZIP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNZIP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNZIP" >&5
 $as_echo_n "checking for UNZIP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool UNZIP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool UNZIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -17576,7 +18442,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$ZIP" = x; then
+  if [ -z "${ZIP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in zip
 do
@@ -17689,14 +18555,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$ZIP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool ZIP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$ZIP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool ZIP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool ZIP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ZIP" >&5
+$as_echo_n "checking for ZIP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$ZIP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool ZIP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool ZIP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -17736,22 +18611,23 @@
 fi
 
 
-        if test "x$ZIP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool ZIP=$tool_specified" >&5
+          if test "x$ZIP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool ZIP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool ZIP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ZIP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ZIP" >&5
 $as_echo_n "checking for ZIP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool ZIP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool ZIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -17771,7 +18647,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$LDD" = x; then
+  if [ -z "${LDD+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in ldd
 do
@@ -17884,14 +18760,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$LDD"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LDD=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$LDD" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool LDD= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool LDD= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LDD" >&5
+$as_echo_n "checking for LDD... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$LDD"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LDD=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool LDD=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -17931,22 +18816,23 @@
 fi
 
 
-        if test "x$LDD" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LDD=$tool_specified" >&5
+          if test "x$LDD" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LDD=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool LDD=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LDD" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LDD" >&5
 $as_echo_n "checking for LDD... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool LDD=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool LDD=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -17963,7 +18849,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$OTOOL" = x; then
+  if [ -z "${OTOOL+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in otool
 do
@@ -18076,14 +18962,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$OTOOL"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OTOOL=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$OTOOL" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool OTOOL= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool OTOOL= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OTOOL" >&5
+$as_echo_n "checking for OTOOL... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$OTOOL"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OTOOL=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool OTOOL=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -18123,22 +19018,23 @@
 fi
 
 
-        if test "x$OTOOL" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OTOOL=$tool_specified" >&5
+          if test "x$OTOOL" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OTOOL=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool OTOOL=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OTOOL" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OTOOL" >&5
 $as_echo_n "checking for OTOOL... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool OTOOL=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool OTOOL=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -18152,7 +19048,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$READELF" = x; then
+  if [ -z "${READELF+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in greadelf readelf
 do
@@ -18265,14 +19161,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$READELF"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool READELF=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$READELF" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool READELF= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool READELF= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READELF" >&5
+$as_echo_n "checking for READELF... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$READELF"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool READELF=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool READELF=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -18312,33 +19217,34 @@
 fi
 
 
-        if test "x$READELF" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool READELF=$tool_specified" >&5
+          if test "x$READELF" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool READELF=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool READELF=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READELF" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READELF" >&5
 $as_echo_n "checking for READELF... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool READELF=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
-      fi
-    fi
-  fi
-
-
-
-
-  # Publish this variable in the help.
-
-
-  if test "x$HG" = x; then
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool READELF=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${HG+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in hg
 do
@@ -18451,14 +19357,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$HG"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool HG=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$HG" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool HG= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool HG= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HG" >&5
+$as_echo_n "checking for HG... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$HG"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool HG=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool HG=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -18498,33 +19413,34 @@
 fi
 
 
-        if test "x$HG" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool HG=$tool_specified" >&5
+          if test "x$HG" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool HG=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool HG=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HG" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HG" >&5
 $as_echo_n "checking for HG... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool HG=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
-      fi
-    fi
-  fi
-
-
-
-
-  # Publish this variable in the help.
-
-
-  if test "x$STAT" = x; then
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool HG=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${STAT+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in stat
 do
@@ -18637,14 +19553,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$STAT"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STAT=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$STAT" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool STAT= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool STAT= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STAT" >&5
+$as_echo_n "checking for STAT... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$STAT"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STAT=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool STAT=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -18684,33 +19609,34 @@
 fi
 
 
-        if test "x$STAT" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STAT=$tool_specified" >&5
+          if test "x$STAT" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STAT=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool STAT=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STAT" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STAT" >&5
 $as_echo_n "checking for STAT... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool STAT=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
-      fi
-    fi
-  fi
-
-
-
-
-  # Publish this variable in the help.
-
-
-  if test "x$TIME" = x; then
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool STAT=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${TIME+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in time
 do
@@ -18823,14 +19749,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$TIME"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TIME=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$TIME" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool TIME= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool TIME= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TIME" >&5
+$as_echo_n "checking for TIME... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$TIME"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TIME=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool TIME=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -18870,33 +19805,34 @@
 fi
 
 
-        if test "x$TIME" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TIME=$tool_specified" >&5
+          if test "x$TIME" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TIME=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool TIME=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TIME" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TIME" >&5
 $as_echo_n "checking for TIME... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool TIME=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
-      fi
-    fi
-  fi
-
-
-
-
-  # Publish this variable in the help.
-
-
-  if test "x$PATCH" = x; then
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool TIME=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if [ -z "${PATCH+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in gpatch patch
 do
@@ -19009,14 +19945,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$PATCH"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool PATCH=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$PATCH" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool PATCH= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool PATCH= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PATCH" >&5
+$as_echo_n "checking for PATCH... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$PATCH"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool PATCH=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool PATCH=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -19056,22 +20001,23 @@
 fi
 
 
-        if test "x$PATCH" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool PATCH=$tool_specified" >&5
+          if test "x$PATCH" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool PATCH=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool PATCH=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PATCH" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PATCH" >&5
 $as_echo_n "checking for PATCH... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool PATCH=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool PATCH=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -19093,7 +20039,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$DSYMUTIL" = x; then
+  if [ -z "${DSYMUTIL+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in dsymutil
 do
@@ -19206,14 +20152,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$DSYMUTIL"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DSYMUTIL=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$DSYMUTIL" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool DSYMUTIL= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool DSYMUTIL= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DSYMUTIL" >&5
+$as_echo_n "checking for DSYMUTIL... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$DSYMUTIL"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DSYMUTIL=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool DSYMUTIL=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -19253,22 +20208,23 @@
 fi
 
 
-        if test "x$DSYMUTIL" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DSYMUTIL=$tool_specified" >&5
+          if test "x$DSYMUTIL" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DSYMUTIL=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool DSYMUTIL=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DSYMUTIL" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DSYMUTIL" >&5
 $as_echo_n "checking for DSYMUTIL... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool DSYMUTIL=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool DSYMUTIL=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -19286,7 +20242,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$XATTR" = x; then
+  if [ -z "${XATTR+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in xattr
 do
@@ -19399,14 +20355,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$XATTR"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool XATTR=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$XATTR" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool XATTR= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool XATTR= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XATTR" >&5
+$as_echo_n "checking for XATTR... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$XATTR"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool XATTR=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool XATTR=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -19446,22 +20411,23 @@
 fi
 
 
-        if test "x$XATTR" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool XATTR=$tool_specified" >&5
+          if test "x$XATTR" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool XATTR=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool XATTR=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XATTR" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XATTR" >&5
 $as_echo_n "checking for XATTR... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool XATTR=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool XATTR=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -19478,7 +20444,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$CODESIGN" = x; then
+  if [ -z "${CODESIGN+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in codesign
 do
@@ -19591,14 +20557,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$CODESIGN"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CODESIGN=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$CODESIGN" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool CODESIGN= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool CODESIGN= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CODESIGN" >&5
+$as_echo_n "checking for CODESIGN... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$CODESIGN"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CODESIGN=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool CODESIGN=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -19638,22 +20613,23 @@
 fi
 
 
-        if test "x$CODESIGN" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CODESIGN=$tool_specified" >&5
+          if test "x$CODESIGN" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CODESIGN=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool CODESIGN=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CODESIGN" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CODESIGN" >&5
 $as_echo_n "checking for CODESIGN... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool CODESIGN=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool CODESIGN=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -19681,7 +20657,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$SETFILE" = x; then
+  if [ -z "${SETFILE+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in SetFile
 do
@@ -19794,14 +20770,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$SETFILE"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SETFILE=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$SETFILE" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool SETFILE= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool SETFILE= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SETFILE" >&5
+$as_echo_n "checking for SETFILE... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$SETFILE"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SETFILE=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool SETFILE=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -19841,22 +20826,23 @@
 fi
 
 
-        if test "x$SETFILE" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SETFILE=$tool_specified" >&5
+          if test "x$SETFILE" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SETFILE=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool SETFILE=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SETFILE" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SETFILE" >&5
 $as_echo_n "checking for SETFILE... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool SETFILE=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool SETFILE=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -20030,182 +21016,6 @@
 
 
 
-# Setup builddeps, for automatic downloading of tools we need.
-# This is needed before we can call BDEPS_CHECK_MODULE, which is done in
-# boot-jdk setup, but we need to have basic tools setup first.
-
-
-# Check whether --with-builddeps-conf was given.
-if test "${with_builddeps_conf+set}" = set; then :
-  withval=$with_builddeps_conf;
-fi
-
-
-
-# Check whether --with-builddeps-server was given.
-if test "${with_builddeps_server+set}" = set; then :
-  withval=$with_builddeps_server;
-fi
-
-
-
-# Check whether --with-builddeps-dir was given.
-if test "${with_builddeps_dir+set}" = set; then :
-  withval=$with_builddeps_dir;
-else
-  with_builddeps_dir=/localhome/builddeps
-fi
-
-
-
-# Check whether --with-builddeps-group was given.
-if test "${with_builddeps_group+set}" = set; then :
-  withval=$with_builddeps_group;
-fi
-
-
-
-
-  if test "x$with_builddeps_server" != x || test "x$with_builddeps_conf" != x; then
-    if test "x$with_builddeps_conf" != x; then
-      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for supplied builddeps configuration file" >&5
-$as_echo_n "checking for supplied builddeps configuration file... " >&6; }
-      builddepsfile=$with_builddeps_conf
-      if test -s $builddepsfile; then
-        . $builddepsfile
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: loaded!" >&5
-$as_echo "loaded!" >&6; }
-      else
-        as_fn_error $? "The given builddeps conf file $with_builddeps_conf could not be loaded!" "$LINENO" 5
-      fi
-    else
-      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for builddeps.conf files in sources..." >&5
-$as_echo_n "checking for builddeps.conf files in sources...... " >&6; }
-      builddepsfile=`mktemp`
-      touch $builddepsfile
-      # Put all found confs into a single file.
-      find ${SRC_ROOT} -name builddeps.conf -exec cat \{\} \; >> $builddepsfile
-      # Source the file to acquire the variables
-      if test -s $builddepsfile; then
-        . $builddepsfile
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: found at least one!" >&5
-$as_echo "found at least one!" >&6; }
-      else
-        as_fn_error $? "Could not find any builddeps.conf at all!" "$LINENO" 5
-      fi
-    fi
-    # Create build and target names that use _ instead of "-" and ".".
-    # This is necessary to use them in variable names.
-    build_var=`echo ${OPENJDK_BUILD_AUTOCONF_NAME} | tr '-' '_' | tr '.' '_'`
-    target_var=`echo ${OPENJDK_TARGET_AUTOCONF_NAME} | tr '-' '_' | tr '.' '_'`
-    # Extract rewrite information for build and target
-    eval rewritten_build=\${REWRITE_${build_var}}
-    if test "x$rewritten_build" = x; then
-      rewritten_build=${OPENJDK_BUILD_AUTOCONF_NAME}
-      echo Build stays the same $rewritten_build
-    else
-      echo Rewriting build for builddeps into $rewritten_build
-    fi
-    eval rewritten_target=\${REWRITE_${target_var}}
-    if test "x$rewritten_target" = x; then
-      rewritten_target=${OPENJDK_TARGET_AUTOCONF_NAME}
-      echo Target stays the same $rewritten_target
-    else
-      echo Rewriting target for builddeps into $rewritten_target
-    fi
-    rewritten_build_var=`echo ${rewritten_build} | tr '-' '_' | tr '.' '_'`
-    rewritten_target_var=`echo ${rewritten_target} | tr '-' '_' | tr '.' '_'`
-  fi
-  for ac_prog in 7z unzip
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_BDEPS_UNZIP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$BDEPS_UNZIP"; then
-  ac_cv_prog_BDEPS_UNZIP="$BDEPS_UNZIP" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_BDEPS_UNZIP="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-BDEPS_UNZIP=$ac_cv_prog_BDEPS_UNZIP
-if test -n "$BDEPS_UNZIP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BDEPS_UNZIP" >&5
-$as_echo "$BDEPS_UNZIP" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$BDEPS_UNZIP" && break
-done
-
-  if test "x$BDEPS_UNZIP" = x7z; then
-    BDEPS_UNZIP="7z x"
-  fi
-
-  for ac_prog in wget lftp ftp
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_BDEPS_FTP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$BDEPS_FTP"; then
-  ac_cv_prog_BDEPS_FTP="$BDEPS_FTP" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_BDEPS_FTP="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-BDEPS_FTP=$ac_cv_prog_BDEPS_FTP
-if test -n "$BDEPS_FTP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BDEPS_FTP" >&5
-$as_echo "$BDEPS_FTP" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$BDEPS_FTP" && break
-done
-
-
-
 ###############################################################################
 #
 # Determine OpenJDK variants, options and version numbers.
@@ -20637,330 +21447,6 @@
     as_fn_error $? "The path given by --with-boot-jdk does not contain a valid Boot JDK" "$LINENO" 5
   fi
 
-  # Test: Is bootjdk available from builddeps?
-
-  if test "x$BOOT_JDK_FOUND" = xno; then
-    # Now execute the test
-
-
-
-  if test "x$with_builddeps_server" != x || test "x$with_builddeps_conf" != x; then
-    # Source the builddeps file again, to make sure it uses the latest variables!
-    . $builddepsfile
-    # Look for a target and build machine specific resource!
-    eval resource=\${builddep_bootjdk_BUILD_${rewritten_build_var}_TARGET_${rewritten_target_var}}
-    if test "x$resource" = x; then
-      # Ok, lets instead look for a target specific resource
-      eval resource=\${builddep_bootjdk_TARGET_${rewritten_target_var}}
-    fi
-    if test "x$resource" = x; then
-      # Ok, lets instead look for a build specific resource
-      eval resource=\${builddep_bootjdk_BUILD_${rewritten_build_var}}
-    fi
-    if test "x$resource" = x; then
-      # Ok, lets instead look for a generic resource
-      # (The bootjdk comes from M4 and not the shell, thus no need for eval here.)
-      resource=${builddep_bootjdk}
-    fi
-    if test "x$resource" != x; then
-      { $as_echo "$as_me:${as_lineno-$LINENO}: Using builddeps $resource for bootjdk" >&5
-$as_echo "$as_me: Using builddeps $resource for bootjdk" >&6;}
-      # If the resource in the builddeps.conf file is an existing directory,
-      # for example /java/linux/cups
-      if test -d ${resource}; then
-        depdir=${resource}
-      else
-
-  # bootjdk is for example mymodule
-  # $resource is for example libs/general/libmymod_1_2_3.zip
-  # $with_builddeps_server is for example ftp://mybuilddeps.myserver.com/builddeps
-  # $with_builddeps_dir is for example /localhome/builddeps
-  # depdir is the name of the variable into which we store the depdir, eg MYMOD
-  # Will download ftp://mybuilddeps.myserver.com/builddeps/libs/general/libmymod_1_2_3.zip and
-  # unzip into the directory: /localhome/builddeps/libmymod_1_2_3
-  filename=`basename $resource`
-  filebase=`echo $filename | sed 's/\.[^\.]*$//'`
-  filebase=${filename%%.*}
-  extension=${filename#*.}
-  installdir=$with_builddeps_dir/$filebase
-  if test ! -f $installdir/$filename.unpacked; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Downloading build dependency bootjdk from $with_builddeps_server/$resource and installing into $installdir" >&5
-$as_echo "$as_me: Downloading build dependency bootjdk from $with_builddeps_server/$resource and installing into $installdir" >&6;}
-    if test ! -d $installdir; then
-      mkdir -p $installdir
-    fi
-    if test ! -d $installdir; then
-      as_fn_error $? "Could not create directory $installdir" "$LINENO" 5
-    fi
-    tmpfile=`mktemp $installdir/bootjdk.XXXXXXXXX`
-    touch $tmpfile
-    if test ! -f $tmpfile; then
-      as_fn_error $? "Could not create files in directory $installdir" "$LINENO" 5
-    fi
-
-  # $with_builddeps_server/$resource  is the ftp://abuilddeps.server.com/libs/cups.zip
-  # $tmpfile is the local file name for the downloaded file.
-  VALID_TOOL=no
-  if test "x$BDEPS_FTP" = xwget; then
-    VALID_TOOL=yes
-    wget -O $tmpfile $with_builddeps_server/$resource
-  fi
-  if test "x$BDEPS_FTP" = xlftp; then
-    VALID_TOOL=yes
-    lftp -c "get $with_builddeps_server/$resource  -o $tmpfile"
-  fi
-  if test "x$BDEPS_FTP" = xftp; then
-    VALID_TOOL=yes
-    FTPSERVER=`echo $with_builddeps_server/$resource  | cut -f 3 -d '/'`
-    FTPPATH=`echo $with_builddeps_server/$resource  | cut -f 4- -d '/'`
-    FTPUSERPWD=${FTPSERVER%%@*}
-    if test "x$FTPSERVER" != "x$FTPUSERPWD"; then
-      FTPUSER=${userpwd%%:*}
-      FTPPWD=${userpwd#*@}
-      FTPSERVER=${FTPSERVER#*@}
-    else
-      FTPUSER=ftp
-      FTPPWD=ftp
-    fi
-    # the "pass" command does not work on some
-    # ftp clients (read ftp.exe) but if it works,
-    # passive mode is better!
-    ( \
-        echo "user $FTPUSER $FTPPWD"        ; \
-        echo "pass"                         ; \
-        echo "bin"                          ; \
-        echo "get $FTPPATH $tmpfile"              ; \
-    ) | ftp -in $FTPSERVER
-  fi
-  if test "x$VALID_TOOL" != xyes; then
-    as_fn_error $? "I do not know how to use the tool: $BDEPS_FTP" "$LINENO" 5
-  fi
-
-    mv $tmpfile $installdir/$filename
-    if test ! -s $installdir/$filename; then
-      as_fn_error $? "Could not download $with_builddeps_server/$resource" "$LINENO" 5
-    fi
-    case "$extension" in
-      zip)  echo "Unzipping $installdir/$filename..."
-        (cd $installdir ; rm -f $installdir/$filename.unpacked ; $BDEPS_UNZIP $installdir/$filename > /dev/null && touch $installdir/$filename.unpacked)
-        ;;
-      tar.gz) echo "Untaring $installdir/$filename..."
-        (cd $installdir ; rm -f $installdir/$filename.unpacked ; tar xzf $installdir/$filename && touch $installdir/$filename.unpacked)
-        ;;
-      tgz) echo "Untaring $installdir/$filename..."
-        (cd $installdir ; rm -f $installdir/$filename.unpacked ; tar xzf $installdir/$filename && touch $installdir/$filename.unpacked)
-        ;;
-      *) as_fn_error $? "Cannot handle build depency archive with extension $extension" "$LINENO" 5
-        ;;
-    esac
-  fi
-  if test -f $installdir/$filename.unpacked; then
-    depdir=$installdir
-  fi
-
-      fi
-      # Source the builddeps file again, because in the previous command, the depdir
-      # was updated to point at the current build dependency install directory.
-      . $builddepsfile
-      # Now extract variables from the builddeps.conf files.
-      theroot=${builddep_bootjdk_ROOT}
-      thecflags=${builddep_bootjdk_CFLAGS}
-      thelibs=${builddep_bootjdk_LIBS}
-      if test "x$depdir" = x; then
-        as_fn_error $? "Could not download build dependency bootjdk" "$LINENO" 5
-      fi
-      BOOT_JDK=$depdir
-      if test "x$theroot" != x; then
-        BOOT_JDK="$theroot"
-      fi
-      if test "x$thecflags" != x; then
-        BOOT_JDK_CFLAGS="$thecflags"
-      fi
-      if test "x$thelibs" != x; then
-        BOOT_JDK_LIBS="$thelibs"
-      fi
-      BOOT_JDK_FOUND=maybe
-      else BOOT_JDK_FOUND=no
-
-    fi
-    else BOOT_JDK_FOUND=no
-
-  fi
-
-
-
-    # If previous step claimed to have found a JDK, check it to see if it seems to be valid.
-    if test "x$BOOT_JDK_FOUND" = xmaybe; then
-      # Do we have a bin/java?
-      if test ! -x "$BOOT_JDK/bin/java"; then
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Potential Boot JDK found at $BOOT_JDK did not contain bin/java; ignoring" >&5
-$as_echo "$as_me: Potential Boot JDK found at $BOOT_JDK did not contain bin/java; ignoring" >&6;}
-        BOOT_JDK_FOUND=no
-      else
-        # Do we have a bin/javac?
-        if test ! -x "$BOOT_JDK/bin/javac"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: Potential Boot JDK found at $BOOT_JDK did not contain bin/javac; ignoring" >&5
-$as_echo "$as_me: Potential Boot JDK found at $BOOT_JDK did not contain bin/javac; ignoring" >&6;}
-          { $as_echo "$as_me:${as_lineno-$LINENO}: (This might be an JRE instead of an JDK)" >&5
-$as_echo "$as_me: (This might be an JRE instead of an JDK)" >&6;}
-          BOOT_JDK_FOUND=no
-        else
-          # Oh, this is looking good! We probably have found a proper JDK. Is it the correct version?
-          BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 | head -n 1`
-
-          # Extra M4 quote needed to protect [] in grep expression.
-          FOUND_CORRECT_VERSION=`echo $BOOT_JDK_VERSION | grep  '\"1\.[89]\.'`
-          if test "x$FOUND_CORRECT_VERSION" = x; then
-            { $as_echo "$as_me:${as_lineno-$LINENO}: Potential Boot JDK found at $BOOT_JDK is incorrect JDK version ($BOOT_JDK_VERSION); ignoring" >&5
-$as_echo "$as_me: Potential Boot JDK found at $BOOT_JDK is incorrect JDK version ($BOOT_JDK_VERSION); ignoring" >&6;}
-            { $as_echo "$as_me:${as_lineno-$LINENO}: (Your Boot JDK must be version 8 or 9)" >&5
-$as_echo "$as_me: (Your Boot JDK must be version 8 or 9)" >&6;}
-            BOOT_JDK_FOUND=no
-          else
-            # We're done! :-)
-            BOOT_JDK_FOUND=yes
-
-  # Only process if variable expands to non-empty
-
-  if test "x$BOOT_JDK" != x; then
-    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
-
-  # Input might be given as Windows format, start by converting to
-  # unix format.
-  path="$BOOT_JDK"
-  new_path=`$CYGPATH -u "$path"`
-
-  # Cygwin tries to hide some aspects of the Windows file system, such that binaries are
-  # named .exe but called without that suffix. Therefore, "foo" and "foo.exe" are considered
-  # the same file, most of the time (as in "test -f"). But not when running cygpath -s, then
-  # "foo.exe" is OK but "foo" is an error.
-  #
-  # This test is therefore slightly more accurate than "test -f" to check for file precense.
-  # It is also a way to make sure we got the proper file name for the real test later on.
-  test_shortpath=`$CYGPATH -s -m "$new_path" 2> /dev/null`
-  if test "x$test_shortpath" = x; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: The path of BOOT_JDK, which resolves as \"$path\", is invalid." >&5
-$as_echo "$as_me: The path of BOOT_JDK, which resolves as \"$path\", is invalid." >&6;}
-    as_fn_error $? "Cannot locate the the path of BOOT_JDK" "$LINENO" 5
-  fi
-
-  # Call helper function which possibly converts this using DOS-style short mode.
-  # If so, the updated path is stored in $new_path.
-
-  input_path="$new_path"
-  # Check if we need to convert this using DOS-style short mode. If the path
-  # contains just simple characters, use it. Otherwise (spaces, weird characters),
-  # take no chances and rewrite it.
-  # Note: m4 eats our [], so we need to use [ and ] instead.
-  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-._/a-zA-Z0-9]`
-  if test "x$has_forbidden_chars" != x; then
-    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
-    shortmode_path=`$CYGPATH -s -m -a "$input_path"`
-    path_after_shortmode=`$CYGPATH -u "$shortmode_path"`
-    if test "x$path_after_shortmode" != "x$input_to_shortpath"; then
-      # Going to short mode and back again did indeed matter. Since short mode is
-      # case insensitive, let's make it lowercase to improve readability.
-      shortmode_path=`$ECHO "$shortmode_path" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
-      # Now convert it back to Unix-style (cygpath)
-      input_path=`$CYGPATH -u "$shortmode_path"`
-      new_path="$input_path"
-    fi
-  fi
-
-  test_cygdrive_prefix=`$ECHO $input_path | $GREP ^/cygdrive/`
-  if test "x$test_cygdrive_prefix" = x; then
-    # As a simple fix, exclude /usr/bin since it's not a real path.
-    if test "x`$ECHO $new_path | $GREP ^/usr/bin/`" = x; then
-      # The path is in a Cygwin special directory (e.g. /home). We need this converted to
-      # a path prefixed by /cygdrive for fixpath to work.
-      new_path="$CYGWIN_ROOT_PATH$input_path"
-    fi
-  fi
-
-
-  if test "x$path" != "x$new_path"; then
-    BOOT_JDK="$new_path"
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting BOOT_JDK to \"$new_path\"" >&5
-$as_echo "$as_me: Rewriting BOOT_JDK to \"$new_path\"" >&6;}
-  fi
-
-    elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
-
-  path="$BOOT_JDK"
-  has_colon=`$ECHO $path | $GREP ^.:`
-  new_path="$path"
-  if test "x$has_colon" = x; then
-    # Not in mixed or Windows style, start by that.
-    new_path=`cmd //c echo $path`
-  fi
-
-
-  input_path="$new_path"
-  # Check if we need to convert this using DOS-style short mode. If the path
-  # contains just simple characters, use it. Otherwise (spaces, weird characters),
-  # take no chances and rewrite it.
-  # Note: m4 eats our [], so we need to use [ and ] instead.
-  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-_/:a-zA-Z0-9]`
-  if test "x$has_forbidden_chars" != x; then
-    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
-    new_path=`cmd /c "for %A in (\"$input_path\") do @echo %~sA"|$TR \\\\\\\\ / | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
-  fi
-
-
-  windows_path="$new_path"
-  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
-    unix_path=`$CYGPATH -u "$windows_path"`
-    new_path="$unix_path"
-  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
-    unix_path=`$ECHO "$windows_path" | $SED -e 's,^\\(.\\):,/\\1,g' -e 's,\\\\,/,g'`
-    new_path="$unix_path"
-  fi
-
-  if test "x$path" != "x$new_path"; then
-    BOOT_JDK="$new_path"
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting BOOT_JDK to \"$new_path\"" >&5
-$as_echo "$as_me: Rewriting BOOT_JDK to \"$new_path\"" >&6;}
-  fi
-
-  # Save the first 10 bytes of this path to the storage, so fixpath can work.
-  all_fixpath_prefixes=("${all_fixpath_prefixes[@]}" "${new_path:0:10}")
-
-    else
-      # We're on a unix platform. Hooray! :)
-      path="$BOOT_JDK"
-      has_space=`$ECHO "$path" | $GREP " "`
-      if test "x$has_space" != x; then
-        { $as_echo "$as_me:${as_lineno-$LINENO}: The path of BOOT_JDK, which resolves as \"$path\", is invalid." >&5
-$as_echo "$as_me: The path of BOOT_JDK, which resolves as \"$path\", is invalid." >&6;}
-        as_fn_error $? "Spaces are not allowed in this path." "$LINENO" 5
-      fi
-
-      # Use eval to expand a potential ~
-      eval path="$path"
-      if test ! -f "$path" && test ! -d "$path"; then
-        as_fn_error $? "The path of BOOT_JDK, which resolves as \"$path\", is not found." "$LINENO" 5
-      fi
-
-      BOOT_JDK="`cd "$path"; $THEPWDCMD -L`"
-    fi
-  fi
-
-            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Boot JDK" >&5
-$as_echo_n "checking for Boot JDK... " >&6; }
-            { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BOOT_JDK" >&5
-$as_echo "$BOOT_JDK" >&6; }
-            { $as_echo "$as_me:${as_lineno-$LINENO}: checking Boot JDK version" >&5
-$as_echo_n "checking Boot JDK version... " >&6; }
-            BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 | $TR '\n\r' '  '`
-            { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BOOT_JDK_VERSION" >&5
-$as_echo "$BOOT_JDK_VERSION" >&6; }
-          fi # end check jdk version
-        fi # end check javac
-      fi # end check java
-    fi # end check boot jdk found
-  fi
-
-
   # Test: On MacOS X, can we find a boot jdk using /usr/libexec/java_home?
 
   if test "x$BOOT_JDK_FOUND" = xno; then
@@ -25703,7 +26189,7 @@
   if test "x$BOOT_JDK_FOUND" = xno; then
 
   # Print a helpful message on how to acquire the necessary build dependency.
-  # openjdk is the help tag: freetype, cups, pulse, alsa etc
+  # openjdk is the help tag: freetype, cups, alsa etc
   MISSING_DEPENDENCY=openjdk
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -25747,7 +26233,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$JAVA" = x; then
+  if [ -z "${JAVA+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
 
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for java in Boot JDK" >&5
@@ -25800,14 +26286,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$JAVA"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAVA=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$JAVA" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool JAVA= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool JAVA= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVA" >&5
+$as_echo_n "checking for JAVA... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$JAVA"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAVA=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool JAVA=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -25847,22 +26342,23 @@
 fi
 
 
-        if test "x$JAVA" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAVA=$tool_specified" >&5
+          if test "x$JAVA" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAVA=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool JAVA=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVA" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVA" >&5
 $as_echo_n "checking for JAVA... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool JAVA=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool JAVA=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -25874,7 +26370,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$JAVAC" = x; then
+  if [ -z "${JAVAC+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
 
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for javac in Boot JDK" >&5
@@ -25927,14 +26423,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$JAVAC"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAVAC=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$JAVAC" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool JAVAC= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool JAVAC= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVAC" >&5
+$as_echo_n "checking for JAVAC... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$JAVAC"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAVAC=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool JAVAC=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -25974,22 +26479,23 @@
 fi
 
 
-        if test "x$JAVAC" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAVAC=$tool_specified" >&5
+          if test "x$JAVAC" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAVAC=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool JAVAC=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVAC" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVAC" >&5
 $as_echo_n "checking for JAVAC... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool JAVAC=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool JAVAC=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -26001,7 +26507,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$JAVAH" = x; then
+  if [ -z "${JAVAH+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
 
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for javah in Boot JDK" >&5
@@ -26054,14 +26560,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$JAVAH"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAVAH=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$JAVAH" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool JAVAH= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool JAVAH= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVAH" >&5
+$as_echo_n "checking for JAVAH... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$JAVAH"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAVAH=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool JAVAH=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -26101,22 +26616,23 @@
 fi
 
 
-        if test "x$JAVAH" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAVAH=$tool_specified" >&5
+          if test "x$JAVAH" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAVAH=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool JAVAH=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVAH" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAVAH" >&5
 $as_echo_n "checking for JAVAH... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool JAVAH=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool JAVAH=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -26128,7 +26644,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$JAR" = x; then
+  if [ -z "${JAR+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
 
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for jar in Boot JDK" >&5
@@ -26181,14 +26697,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$JAR"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAR=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$JAR" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool JAR= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool JAR= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAR" >&5
+$as_echo_n "checking for JAR... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$JAR"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JAR=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool JAR=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -26228,22 +26753,23 @@
 fi
 
 
-        if test "x$JAR" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAR=$tool_specified" >&5
+          if test "x$JAR" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JAR=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool JAR=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAR" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JAR" >&5
 $as_echo_n "checking for JAR... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool JAR=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool JAR=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -26255,7 +26781,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$JARSIGNER" = x; then
+  if [ -z "${JARSIGNER+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
 
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for jarsigner in Boot JDK" >&5
@@ -26308,14 +26834,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$JARSIGNER"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JARSIGNER=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$JARSIGNER" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool JARSIGNER= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool JARSIGNER= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JARSIGNER" >&5
+$as_echo_n "checking for JARSIGNER... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$JARSIGNER"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JARSIGNER=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool JARSIGNER=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -26355,22 +26890,23 @@
 fi
 
 
-        if test "x$JARSIGNER" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JARSIGNER=$tool_specified" >&5
+          if test "x$JARSIGNER" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JARSIGNER=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool JARSIGNER=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JARSIGNER" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JARSIGNER" >&5
 $as_echo_n "checking for JARSIGNER... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool JARSIGNER=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool JARSIGNER=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -28607,7 +29143,7 @@
     if test "x$CC" = x; then
 
   # Print a helpful message on how to acquire the necessary build dependency.
-  # devkit is the help tag: freetype, cups, pulse, alsa etc
+  # devkit is the help tag: freetype, cups, alsa etc
   MISSING_DEPENDENCY=devkit
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -30355,7 +30891,7 @@
     if test "x$CXX" = x; then
 
   # Print a helpful message on how to acquire the necessary build dependency.
-  # devkit is the help tag: freetype, cups, pulse, alsa etc
+  # devkit is the help tag: freetype, cups, alsa etc
   MISSING_DEPENDENCY=devkit
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -32800,7 +33336,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$AS" = x; then
+  if [ -z "${AS+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in as
 do
@@ -32913,14 +33449,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$AS"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AS=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$AS" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool AS= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool AS= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AS" >&5
+$as_echo_n "checking for AS... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$AS"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AS=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool AS=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -32960,22 +33505,23 @@
 fi
 
 
-        if test "x$AS" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AS=$tool_specified" >&5
+          if test "x$AS" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AS=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool AS=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AS" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AS" >&5
 $as_echo_n "checking for AS... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool AS=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool AS=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -33321,7 +33867,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$AR" = x; then
+  if [ -z "${AR+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
   for ac_prog in ar
@@ -33544,14 +34090,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$AR"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AR=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$AR" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool AR= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool AR= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AR" >&5
+$as_echo_n "checking for AR... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$AR"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AR=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool AR=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -33591,22 +34146,23 @@
 fi
 
 
-        if test "x$AR" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AR=$tool_specified" >&5
+          if test "x$AR" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AR=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool AR=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AR" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AR" >&5
 $as_echo_n "checking for AR... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool AR=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool AR=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -33907,7 +34463,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$LIPO" = x; then
+  if [ -z "${LIPO+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in lipo
 do
@@ -34020,14 +34576,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$LIPO"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LIPO=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$LIPO" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool LIPO= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool LIPO= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LIPO" >&5
+$as_echo_n "checking for LIPO... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$LIPO"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LIPO=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool LIPO=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -34067,22 +34632,23 @@
 fi
 
 
-        if test "x$LIPO" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LIPO=$tool_specified" >&5
+          if test "x$LIPO" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LIPO=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool LIPO=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LIPO" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LIPO" >&5
 $as_echo_n "checking for LIPO... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool LIPO=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool LIPO=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -35433,7 +35999,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$STRIP" = x; then
+  if [ -z "${STRIP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in strip
 do
@@ -35546,14 +36112,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$STRIP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STRIP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$STRIP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool STRIP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool STRIP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
+$as_echo_n "checking for STRIP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$STRIP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STRIP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool STRIP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -35593,22 +36168,23 @@
 fi
 
 
-        if test "x$STRIP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STRIP=$tool_specified" >&5
+          if test "x$STRIP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STRIP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool STRIP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
 $as_echo_n "checking for STRIP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool STRIP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool STRIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -35905,7 +36481,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$NM" = x; then
+  if [ -z "${NM+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in nm
 do
@@ -36018,14 +36594,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$NM"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NM=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$NM" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool NM= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool NM= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
+$as_echo_n "checking for NM... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$NM"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NM=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool NM=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -36065,22 +36650,23 @@
 fi
 
 
-        if test "x$NM" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NM=$tool_specified" >&5
+          if test "x$NM" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NM=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool NM=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
 $as_echo_n "checking for NM... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool NM=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool NM=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -36377,7 +36963,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$GNM" = x; then
+  if [ -z "${GNM+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in gnm
 do
@@ -36490,14 +37076,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$GNM"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool GNM=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$GNM" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool GNM= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool GNM= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNM" >&5
+$as_echo_n "checking for GNM... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$GNM"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool GNM=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool GNM=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -36537,22 +37132,23 @@
 fi
 
 
-        if test "x$GNM" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool GNM=$tool_specified" >&5
+          if test "x$GNM" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool GNM=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool GNM=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNM" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNM" >&5
 $as_echo_n "checking for GNM... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool GNM=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool GNM=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -36851,7 +37447,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$STRIP" = x; then
+  if [ -z "${STRIP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
   for ac_prog in strip
@@ -37074,14 +37670,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$STRIP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STRIP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$STRIP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool STRIP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool STRIP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
+$as_echo_n "checking for STRIP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$STRIP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STRIP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool STRIP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -37121,22 +37726,23 @@
 fi
 
 
-        if test "x$STRIP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STRIP=$tool_specified" >&5
+          if test "x$STRIP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STRIP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool STRIP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
 $as_echo_n "checking for STRIP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool STRIP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool STRIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -37433,7 +38039,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$NM" = x; then
+  if [ -z "${NM+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
   for ac_prog in nm
@@ -37656,14 +38262,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$NM"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NM=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$NM" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool NM= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool NM= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
+$as_echo_n "checking for NM... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$NM"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NM=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool NM=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -37703,22 +38318,23 @@
 fi
 
 
-        if test "x$NM" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NM=$tool_specified" >&5
+          if test "x$NM" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NM=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool NM=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
 $as_echo_n "checking for NM... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool NM=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool NM=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -38022,7 +38638,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$OBJCOPY" = x; then
+  if [ -z "${OBJCOPY+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
   for ac_prog in gobjcopy objcopy
@@ -38245,14 +38861,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$OBJCOPY"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OBJCOPY=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$OBJCOPY" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool OBJCOPY= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool OBJCOPY= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJCOPY" >&5
+$as_echo_n "checking for OBJCOPY... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$OBJCOPY"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OBJCOPY=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool OBJCOPY=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -38292,22 +38917,23 @@
 fi
 
 
-        if test "x$OBJCOPY" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OBJCOPY=$tool_specified" >&5
+          if test "x$OBJCOPY" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OBJCOPY=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool OBJCOPY=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJCOPY" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJCOPY" >&5
 $as_echo_n "checking for OBJCOPY... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool OBJCOPY=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool OBJCOPY=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -38651,7 +39277,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$OBJDUMP" = x; then
+  if [ -z "${OBJDUMP+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
   for ac_prog in gobjdump objdump
@@ -38874,14 +39500,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$OBJDUMP"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OBJDUMP=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$OBJDUMP" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool OBJDUMP= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool OBJDUMP= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJDUMP" >&5
+$as_echo_n "checking for OBJDUMP... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$OBJDUMP"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OBJDUMP=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool OBJDUMP=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -38921,22 +39556,23 @@
 fi
 
 
-        if test "x$OBJDUMP" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OBJDUMP=$tool_specified" >&5
+          if test "x$OBJDUMP" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OBJDUMP=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool OBJDUMP=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJDUMP" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJDUMP" >&5
 $as_echo_n "checking for OBJDUMP... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool OBJDUMP=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool OBJDUMP=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -39260,7 +39896,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$BUILD_CC" = x; then
+  if [ -z "${BUILD_CC+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cl cc gcc
 do
@@ -39373,14 +40009,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$BUILD_CC"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_CC=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$BUILD_CC" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool BUILD_CC= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool BUILD_CC= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CC" >&5
+$as_echo_n "checking for BUILD_CC... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$BUILD_CC"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_CC=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool BUILD_CC=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -39420,22 +40065,23 @@
 fi
 
 
-        if test "x$BUILD_CC" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_CC=$tool_specified" >&5
+          if test "x$BUILD_CC" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_CC=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool BUILD_CC=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CC" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CC" >&5
 $as_echo_n "checking for BUILD_CC... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool BUILD_CC=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool BUILD_CC=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -39732,7 +40378,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$BUILD_CXX" = x; then
+  if [ -z "${BUILD_CXX+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cl CC g++
 do
@@ -39845,14 +40491,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$BUILD_CXX"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_CXX=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$BUILD_CXX" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool BUILD_CXX= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool BUILD_CXX= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CXX" >&5
+$as_echo_n "checking for BUILD_CXX... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$BUILD_CXX"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_CXX=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool BUILD_CXX=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -39892,22 +40547,23 @@
 fi
 
 
-        if test "x$BUILD_CXX" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_CXX=$tool_specified" >&5
+          if test "x$BUILD_CXX" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_CXX=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool BUILD_CXX=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CXX" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CXX" >&5
 $as_echo_n "checking for BUILD_CXX... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool BUILD_CXX=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool BUILD_CXX=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -40204,7 +40860,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$BUILD_LD" = x; then
+  if [ -z "${BUILD_LD+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in ld
 do
@@ -40317,14 +40973,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$BUILD_LD"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_LD=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$BUILD_LD" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool BUILD_LD= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool BUILD_LD= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_LD" >&5
+$as_echo_n "checking for BUILD_LD... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$BUILD_LD"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_LD=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool BUILD_LD=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -40364,22 +41029,23 @@
 fi
 
 
-        if test "x$BUILD_LD" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_LD=$tool_specified" >&5
+          if test "x$BUILD_LD" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_LD=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool BUILD_LD=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_LD" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_LD" >&5
 $as_echo_n "checking for BUILD_LD... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool BUILD_LD=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool BUILD_LD=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -41143,7 +41809,7 @@
   # Publish this variable in the help.
 
 
-  if test "x$JTREGEXE" = x; then
+  if [ -z "${JTREGEXE+x}" ]; then
     # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in jtreg
 do
@@ -41256,14 +41922,23 @@
       # for unknown variables in the end.
       CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
 
-      # Check if the provided tool contains a complete path.
-      tool_specified="$JTREGEXE"
-      tool_basename="${tool_specified##*/}"
-      if test "x$tool_basename" = "x$tool_specified"; then
-        # A command without a complete path is provided, search $PATH.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JTREGEXE=$tool_basename" >&5
+      # Check if we try to supply an empty value
+      if test "x$JTREGEXE" = x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Setting user supplied tool JTREGEXE= (no value)" >&5
+$as_echo "$as_me: Setting user supplied tool JTREGEXE= (no value)" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JTREGEXE" >&5
+$as_echo_n "checking for JTREGEXE... " >&6; }
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
+$as_echo "disabled" >&6; }
+      else
+        # Check if the provided tool contains a complete path.
+        tool_specified="$JTREGEXE"
+        tool_basename="${tool_specified##*/}"
+        if test "x$tool_basename" = "x$tool_specified"; then
+          # A command without a complete path is provided, search $PATH.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JTREGEXE=$tool_basename" >&5
 $as_echo "$as_me: Will search for user supplied tool JTREGEXE=$tool_basename" >&6;}
-        # Extract the first word of "$tool_basename", so it can be a program name with args.
+          # Extract the first word of "$tool_basename", so it can be a program name with args.
 set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -41303,22 +41978,23 @@
 fi
 
 
-        if test "x$JTREGEXE" = x; then
-          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
-        fi
-      else
-        # Otherwise we believe it is a complete path. Use it as it is.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JTREGEXE=$tool_specified" >&5
+          if test "x$JTREGEXE" = x; then
+            as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+          fi
+        else
+          # Otherwise we believe it is a complete path. Use it as it is.
+          { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JTREGEXE=$tool_specified" >&5
 $as_echo "$as_me: Will use user supplied tool JTREGEXE=$tool_specified" >&6;}
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JTREGEXE" >&5
+          { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JTREGEXE" >&5
 $as_echo_n "checking for JTREGEXE... " >&6; }
-        if test ! -x "$tool_specified"; then
-          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
-$as_echo "not found" >&6; }
-          as_fn_error $? "User supplied tool JTREGEXE=$tool_specified does not exist or is not executable" "$LINENO" 5
-        fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
-$as_echo "$tool_specified" >&6; }
+          if test ! -x "$tool_specified"; then
+            { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+            as_fn_error $? "User supplied tool JTREGEXE=$tool_specified does not exist or is not executable" "$LINENO" 5
+          fi
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+        fi
       fi
     fi
   fi
@@ -41626,7 +42302,7 @@
     if test "x$COMPILE_TYPE" = xreduced; then
 
   # Print a helpful message on how to acquire the necessary build dependency.
-  # reduced is the help tag: freetype, cups, pulse, alsa etc
+  # reduced is the help tag: freetype, cups, alsa etc
   MISSING_DEPENDENCY=reduced
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -41783,7 +42459,7 @@
         if test "x$COMPILE_TYPE" = xreduced; then
 
   # Print a helpful message on how to acquire the necessary build dependency.
-  # reduced is the help tag: freetype, cups, pulse, alsa etc
+  # reduced is the help tag: freetype, cups, alsa etc
   MISSING_DEPENDENCY=reduced
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -43187,83 +43863,2814 @@
 
 
 
-
-  ###############################################################################
-  #
-  # OS specific settings that we never will need to probe.
-  #
+  # Check if X11 is needed
+  if test "x$OPENJDK_TARGET_OS" = xwindows || test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    # No X11 support on windows or macosx
+    NEEDS_LIB_X11=false
+  else
+    if test "x$SUPPORT_HEADFUL" = xno; then
+      # No X11 support if building headless-only
+      NEEDS_LIB_X11=false
+    else
+      # All other instances need X11
+      NEEDS_LIB_X11=true
+    fi
+  fi
+
+  # Check if cups is needed
+  if test "x$OPENJDK_TARGET_OS" = xwindows; then
+    # Windows have a separate print system
+    NEEDS_LIB_CUPS=false
+  else
+    NEEDS_LIB_CUPS=true
+  fi
+
+  # Check if freetype is needed
+  if test "x$OPENJDK" = "xtrue"; then
+    NEEDS_LIB_FREETYPE=true
+  else
+    NEEDS_LIB_FREETYPE=false
+  fi
+
+  # Check if alsa is needed
   if test "x$OPENJDK_TARGET_OS" = xlinux; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking what is not needed on Linux?" >&5
-$as_echo_n "checking what is not needed on Linux?... " >&6; }
-    PULSE_NOT_NEEDED=yes
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: pulse" >&5
-$as_echo "pulse" >&6; }
-  fi
-
-  if test "x$OPENJDK_TARGET_OS" = xsolaris; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking what is not needed on Solaris?" >&5
-$as_echo_n "checking what is not needed on Solaris?... " >&6; }
-    ALSA_NOT_NEEDED=yes
-    PULSE_NOT_NEEDED=yes
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: alsa pulse" >&5
-$as_echo "alsa pulse" >&6; }
-  fi
-
-  if test "x$OPENJDK_TARGET_OS" = xaix; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking what is not needed on AIX?" >&5
-$as_echo_n "checking what is not needed on AIX?... " >&6; }
-    ALSA_NOT_NEEDED=yes
-    PULSE_NOT_NEEDED=yes
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: alsa pulse" >&5
-$as_echo "alsa pulse" >&6; }
-  fi
-
-
-  if test "x$OPENJDK_TARGET_OS" = xwindows; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking what is not needed on Windows?" >&5
-$as_echo_n "checking what is not needed on Windows?... " >&6; }
-    CUPS_NOT_NEEDED=yes
-    ALSA_NOT_NEEDED=yes
-    PULSE_NOT_NEEDED=yes
-    X11_NOT_NEEDED=yes
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: alsa cups pulse x11" >&5
-$as_echo "alsa cups pulse x11" >&6; }
-  fi
-
-  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking what is not needed on MacOSX?" >&5
-$as_echo_n "checking what is not needed on MacOSX?... " >&6; }
-    ALSA_NOT_NEEDED=yes
-    PULSE_NOT_NEEDED=yes
-    X11_NOT_NEEDED=yes
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: alsa pulse x11" >&5
-$as_echo "alsa pulse x11" >&6; }
-  fi
-
-  if test "x$OPENJDK_TARGET_OS" = xbsd; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking what is not needed on bsd?" >&5
-$as_echo_n "checking what is not needed on bsd?... " >&6; }
-    ALSA_NOT_NEEDED=yes
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: alsa" >&5
-$as_echo "alsa" >&6; }
-  fi
-
-  if test "x$OPENJDK" = "xfalse"; then
-    FREETYPE_NOT_NEEDED=yes
-  fi
-
-  if test "x$SUPPORT_HEADFUL" = xno; then
-    X11_NOT_NEEDED=yes
-  fi
-
-
-
-  ###############################################################################
-  #
-  # Check for X Windows
-  #
-
-  if test "x$X11_NOT_NEEDED" = xyes; then
+    NEEDS_LIB_ALSA=true
+  else
+    NEEDS_LIB_ALSA=false
+  fi
+
+  # Check if ffi is needed
+  if test "x$JVM_VARIANT_ZERO" = xtrue || test "x$JVM_VARIANT_ZEROSHARK" = xtrue; then
+    NEEDS_LIB_FFI=true
+  else
+    NEEDS_LIB_FFI=false
+  fi
+
+
+  # statically link libstdc++ before C++ ABI is stablized on Linux unless
+  # dynamic build is configured on command line.
+
+# Check whether --with-stdc++lib was given.
+if test "${with_stdc__lib+set}" = set; then :
+  withval=$with_stdc__lib;
+        if test "x$with_stdc__lib" != xdynamic && test "x$with_stdc__lib" != xstatic \
+                && test "x$with_stdc__lib" != xdefault; then
+          as_fn_error $? "Bad parameter value --with-stdc++lib=$with_stdc__lib!" "$LINENO" 5
+        fi
+
+else
+  with_stdc__lib=default
+
+fi
+
+
+  if test "x$OPENJDK_TARGET_OS" = xlinux; then
+    # Test if -lstdc++ works.
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if dynamic link of stdc++ is possible" >&5
+$as_echo_n "checking if dynamic link of stdc++ is possible... " >&6; }
+    ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+    OLD_CXXFLAGS="$CXXFLAGS"
+    CXXFLAGS="$CXXFLAGS -lstdc++"
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  has_dynamic_libstdcxx=yes
+else
+  has_dynamic_libstdcxx=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+    CXXFLAGS="$OLD_CXXFLAGS"
+    ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $has_dynamic_libstdcxx" >&5
+$as_echo "$has_dynamic_libstdcxx" >&6; }
+
+    # Test if stdc++ can be linked statically.
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if static link of stdc++ is possible" >&5
+$as_echo_n "checking if static link of stdc++ is possible... " >&6; }
+    STATIC_STDCXX_FLAGS="-Wl,-Bstatic -lstdc++ -lgcc -Wl,-Bdynamic"
+    ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+    OLD_LIBS="$LIBS"
+    OLD_CXX="$CXX"
+    LIBS="$STATIC_STDCXX_FLAGS"
+    CXX="$CC"
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+  has_static_libstdcxx=yes
+else
+  has_static_libstdcxx=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+    LIBS="$OLD_LIBS"
+    CXX="$OLD_CXX"
+    ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $has_static_libstdcxx" >&5
+$as_echo "$has_static_libstdcxx" >&6; }
+
+    if test "x$has_static_libstdcxx" = xno && test "x$has_dynamic_libstdcxx" = xno; then
+      as_fn_error $? "Cannot link to stdc++, neither dynamically nor statically!" "$LINENO" 5
+    fi
+
+    if test "x$with_stdc__lib" = xstatic && test "x$has_static_libstdcxx" = xno; then
+      as_fn_error $? "Static linking of libstdc++ was not possible!" "$LINENO" 5
+    fi
+
+    if test "x$with_stdc__lib" = xdynamic && test "x$has_dynamic_libstdcxx" = xno; then
+      as_fn_error $? "Dynamic linking of libstdc++ was not possible!" "$LINENO" 5
+    fi
+
+    # If dynamic was requested, it's available since it would fail above otherwise.
+    # If dynamic wasn't requested, go with static unless it isn't available.
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to link with libstdc++" >&5
+$as_echo_n "checking how to link with libstdc++... " >&6; }
+    if test "x$with_stdc__lib" = xdynamic || test "x$has_static_libstdcxx" = xno || test "x$JVM_VARIANT_ZEROSHARK" = xtrue; then
+      LIBCXX="$LIBCXX -lstdc++"
+      LDCXX="$CXX"
+      STATIC_CXX_SETTING="STATIC_CXX=false"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: dynamic" >&5
+$as_echo "dynamic" >&6; }
+    else
+      LIBCXX="$LIBCXX $STATIC_STDCXX_FLAGS"
+      LDCXX="$CC"
+      STATIC_CXX_SETTING="STATIC_CXX=true"
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: static" >&5
+$as_echo "static" >&6; }
+    fi
+  fi
+
+
+  # libCrun is the c++ runtime-library with SunStudio (roughly the equivalent of gcc's libstdc++.so)
+  if test "x$TOOLCHAIN_TYPE" = xsolstudio && test "x$LIBCXX" = x; then
+    LIBCXX="${SYSROOT}/usr/lib${OPENJDK_TARGET_CPU_ISADIR}/libCrun.so.1"
+  fi
+
+  # TODO better (platform agnostic) test
+  if test "x$OPENJDK_TARGET_OS" = xmacosx && test "x$LIBCXX" = x && test "x$TOOLCHAIN_TYPE" = xgcc; then
+    LIBCXX="-lstdc++"
+  fi
+
+
+  # Setup Windows runtime dlls
+  if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
+
+
+# Check whether --with-msvcr-dll was given.
+if test "${with_msvcr_dll+set}" = set; then :
+  withval=$with_msvcr_dll;
+fi
+
+
+  if test "x$with_msvcr_dll" != x; then
+    # If given explicitely by user, do not probe. If not present, fail directly.
+
+  DLL_NAME="$MSVCR_NAME"
+  POSSIBLE_MSVC_DLL="$with_msvcr_dll"
+  METHOD="--with-msvcr-dll"
+  if test -n "$POSSIBLE_MSVC_DLL" -a -e "$POSSIBLE_MSVC_DLL"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&5
+$as_echo "$as_me: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&6;}
+
+    # Need to check if the found msvcr is correct architecture
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking found $DLL_NAME architecture" >&5
+$as_echo_n "checking found $DLL_NAME architecture... " >&6; }
+    MSVC_DLL_FILETYPE=`$FILE -b "$POSSIBLE_MSVC_DLL"`
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+      # The MSYS 'file' command returns "PE32 executable for MS Windows (DLL) (GUI) Intel 80386 32-bit"
+      # on x32 and "PE32+ executable for MS Windows (DLL) (GUI) Mono/.Net assembly" on x64 systems.
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH="PE32 executable"
+      else
+        CORRECT_MSVCR_ARCH="PE32+ executable"
+      fi
+    else
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH=386
+      else
+        CORRECT_MSVCR_ARCH=x86-64
+      fi
+    fi
+    if $ECHO "$MSVC_DLL_FILETYPE" | $GREP "$CORRECT_MSVCR_ARCH" 2>&1 > /dev/null; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+$as_echo "ok" >&6; }
+      MSVC_DLL="$POSSIBLE_MSVC_DLL"
+
+  # Only process if variable expands to non-empty
+
+  if test "x$MSVC_DLL" != x; then
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+
+  # Input might be given as Windows format, start by converting to
+  # unix format.
+  path="$MSVC_DLL"
+  new_path=`$CYGPATH -u "$path"`
+
+  # Cygwin tries to hide some aspects of the Windows file system, such that binaries are
+  # named .exe but called without that suffix. Therefore, "foo" and "foo.exe" are considered
+  # the same file, most of the time (as in "test -f"). But not when running cygpath -s, then
+  # "foo.exe" is OK but "foo" is an error.
+  #
+  # This test is therefore slightly more accurate than "test -f" to check for file precense.
+  # It is also a way to make sure we got the proper file name for the real test later on.
+  test_shortpath=`$CYGPATH -s -m "$new_path" 2> /dev/null`
+  if test "x$test_shortpath" = x; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+    as_fn_error $? "Cannot locate the the path of MSVC_DLL" "$LINENO" 5
+  fi
+
+  # Call helper function which possibly converts this using DOS-style short mode.
+  # If so, the updated path is stored in $new_path.
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-._/a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    shortmode_path=`$CYGPATH -s -m -a "$input_path"`
+    path_after_shortmode=`$CYGPATH -u "$shortmode_path"`
+    if test "x$path_after_shortmode" != "x$input_to_shortpath"; then
+      # Going to short mode and back again did indeed matter. Since short mode is
+      # case insensitive, let's make it lowercase to improve readability.
+      shortmode_path=`$ECHO "$shortmode_path" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+      # Now convert it back to Unix-style (cygpath)
+      input_path=`$CYGPATH -u "$shortmode_path"`
+      new_path="$input_path"
+    fi
+  fi
+
+  test_cygdrive_prefix=`$ECHO $input_path | $GREP ^/cygdrive/`
+  if test "x$test_cygdrive_prefix" = x; then
+    # As a simple fix, exclude /usr/bin since it's not a real path.
+    if test "x`$ECHO $new_path | $GREP ^/usr/bin/`" = x; then
+      # The path is in a Cygwin special directory (e.g. /home). We need this converted to
+      # a path prefixed by /cygdrive for fixpath to work.
+      new_path="$CYGWIN_ROOT_PATH$input_path"
+    fi
+  fi
+
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+    elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+
+  path="$MSVC_DLL"
+  has_colon=`$ECHO $path | $GREP ^.:`
+  new_path="$path"
+  if test "x$has_colon" = x; then
+    # Not in mixed or Windows style, start by that.
+    new_path=`cmd //c echo $path`
+  fi
+
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-_/:a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    new_path=`cmd /c "for %A in (\"$input_path\") do @echo %~sA"|$TR \\\\\\\\ / | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+  fi
+
+
+  windows_path="$new_path"
+  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+    unix_path=`$CYGPATH -u "$windows_path"`
+    new_path="$unix_path"
+  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+    unix_path=`$ECHO "$windows_path" | $SED -e 's,^\\(.\\):,/\\1,g' -e 's,\\\\,/,g'`
+    new_path="$unix_path"
+  fi
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+  # Save the first 10 bytes of this path to the storage, so fixpath can work.
+  all_fixpath_prefixes=("${all_fixpath_prefixes[@]}" "${new_path:0:10}")
+
+    else
+      # We're on a unix platform. Hooray! :)
+      path="$MSVC_DLL"
+      has_space=`$ECHO "$path" | $GREP " "`
+      if test "x$has_space" != x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+        as_fn_error $? "Spaces are not allowed in this path." "$LINENO" 5
+      fi
+
+      # Use eval to expand a potential ~
+      eval path="$path"
+      if test ! -f "$path" && test ! -d "$path"; then
+        as_fn_error $? "The path of MSVC_DLL, which resolves as \"$path\", is not found." "$LINENO" 5
+      fi
+
+      MSVC_DLL="`cd "$path"; $THEPWDCMD -L`"
+    fi
+  fi
+
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $DLL_NAME" >&5
+$as_echo_n "checking for $DLL_NAME... " >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MSVC_DLL" >&5
+$as_echo "$MSVC_DLL" >&6; }
+    else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: incorrect, ignoring" >&5
+$as_echo "incorrect, ignoring" >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&5
+$as_echo "$as_me: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&6;}
+    fi
+  fi
+
+    if test "x$MSVC_DLL" = x; then
+      as_fn_error $? "Could not find a proper $MSVCR_NAME as specified by --with-msvcr-dll" "$LINENO" 5
+    fi
+    MSVCR_DLL="$MSVC_DLL"
+  elif test "x$DEVKIT_MSVCR_DLL" != x; then
+
+  DLL_NAME="$MSVCR_NAME"
+  POSSIBLE_MSVC_DLL="$DEVKIT_MSVCR_DLL"
+  METHOD="devkit"
+  if test -n "$POSSIBLE_MSVC_DLL" -a -e "$POSSIBLE_MSVC_DLL"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&5
+$as_echo "$as_me: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&6;}
+
+    # Need to check if the found msvcr is correct architecture
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking found $DLL_NAME architecture" >&5
+$as_echo_n "checking found $DLL_NAME architecture... " >&6; }
+    MSVC_DLL_FILETYPE=`$FILE -b "$POSSIBLE_MSVC_DLL"`
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+      # The MSYS 'file' command returns "PE32 executable for MS Windows (DLL) (GUI) Intel 80386 32-bit"
+      # on x32 and "PE32+ executable for MS Windows (DLL) (GUI) Mono/.Net assembly" on x64 systems.
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH="PE32 executable"
+      else
+        CORRECT_MSVCR_ARCH="PE32+ executable"
+      fi
+    else
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH=386
+      else
+        CORRECT_MSVCR_ARCH=x86-64
+      fi
+    fi
+    if $ECHO "$MSVC_DLL_FILETYPE" | $GREP "$CORRECT_MSVCR_ARCH" 2>&1 > /dev/null; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+$as_echo "ok" >&6; }
+      MSVC_DLL="$POSSIBLE_MSVC_DLL"
+
+  # Only process if variable expands to non-empty
+
+  if test "x$MSVC_DLL" != x; then
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+
+  # Input might be given as Windows format, start by converting to
+  # unix format.
+  path="$MSVC_DLL"
+  new_path=`$CYGPATH -u "$path"`
+
+  # Cygwin tries to hide some aspects of the Windows file system, such that binaries are
+  # named .exe but called without that suffix. Therefore, "foo" and "foo.exe" are considered
+  # the same file, most of the time (as in "test -f"). But not when running cygpath -s, then
+  # "foo.exe" is OK but "foo" is an error.
+  #
+  # This test is therefore slightly more accurate than "test -f" to check for file precense.
+  # It is also a way to make sure we got the proper file name for the real test later on.
+  test_shortpath=`$CYGPATH -s -m "$new_path" 2> /dev/null`
+  if test "x$test_shortpath" = x; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+    as_fn_error $? "Cannot locate the the path of MSVC_DLL" "$LINENO" 5
+  fi
+
+  # Call helper function which possibly converts this using DOS-style short mode.
+  # If so, the updated path is stored in $new_path.
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-._/a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    shortmode_path=`$CYGPATH -s -m -a "$input_path"`
+    path_after_shortmode=`$CYGPATH -u "$shortmode_path"`
+    if test "x$path_after_shortmode" != "x$input_to_shortpath"; then
+      # Going to short mode and back again did indeed matter. Since short mode is
+      # case insensitive, let's make it lowercase to improve readability.
+      shortmode_path=`$ECHO "$shortmode_path" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+      # Now convert it back to Unix-style (cygpath)
+      input_path=`$CYGPATH -u "$shortmode_path"`
+      new_path="$input_path"
+    fi
+  fi
+
+  test_cygdrive_prefix=`$ECHO $input_path | $GREP ^/cygdrive/`
+  if test "x$test_cygdrive_prefix" = x; then
+    # As a simple fix, exclude /usr/bin since it's not a real path.
+    if test "x`$ECHO $new_path | $GREP ^/usr/bin/`" = x; then
+      # The path is in a Cygwin special directory (e.g. /home). We need this converted to
+      # a path prefixed by /cygdrive for fixpath to work.
+      new_path="$CYGWIN_ROOT_PATH$input_path"
+    fi
+  fi
+
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+    elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+
+  path="$MSVC_DLL"
+  has_colon=`$ECHO $path | $GREP ^.:`
+  new_path="$path"
+  if test "x$has_colon" = x; then
+    # Not in mixed or Windows style, start by that.
+    new_path=`cmd //c echo $path`
+  fi
+
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-_/:a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    new_path=`cmd /c "for %A in (\"$input_path\") do @echo %~sA"|$TR \\\\\\\\ / | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+  fi
+
+
+  windows_path="$new_path"
+  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+    unix_path=`$CYGPATH -u "$windows_path"`
+    new_path="$unix_path"
+  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+    unix_path=`$ECHO "$windows_path" | $SED -e 's,^\\(.\\):,/\\1,g' -e 's,\\\\,/,g'`
+    new_path="$unix_path"
+  fi
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+  # Save the first 10 bytes of this path to the storage, so fixpath can work.
+  all_fixpath_prefixes=("${all_fixpath_prefixes[@]}" "${new_path:0:10}")
+
+    else
+      # We're on a unix platform. Hooray! :)
+      path="$MSVC_DLL"
+      has_space=`$ECHO "$path" | $GREP " "`
+      if test "x$has_space" != x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+        as_fn_error $? "Spaces are not allowed in this path." "$LINENO" 5
+      fi
+
+      # Use eval to expand a potential ~
+      eval path="$path"
+      if test ! -f "$path" && test ! -d "$path"; then
+        as_fn_error $? "The path of MSVC_DLL, which resolves as \"$path\", is not found." "$LINENO" 5
+      fi
+
+      MSVC_DLL="`cd "$path"; $THEPWDCMD -L`"
+    fi
+  fi
+
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $DLL_NAME" >&5
+$as_echo_n "checking for $DLL_NAME... " >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MSVC_DLL" >&5
+$as_echo "$MSVC_DLL" >&6; }
+    else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: incorrect, ignoring" >&5
+$as_echo "incorrect, ignoring" >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&5
+$as_echo "$as_me: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&6;}
+    fi
+  fi
+
+    if test "x$MSVC_DLL" = x; then
+      as_fn_error $? "Could not find a proper $MSVCR_NAME as specified by devkit" "$LINENO" 5
+    fi
+    MSVCR_DLL="$MSVC_DLL"
+  else
+
+  DLL_NAME="${MSVCR_NAME}"
+  MSVC_DLL=
+
+  if test "x$MSVC_DLL" = x; then
+    # Probe: Using well-known location from Visual Studio 10.0
+    if test "x$VCINSTALLDIR" != x; then
+      CYGWIN_VC_INSTALL_DIR="$VCINSTALLDIR"
+
+  windows_path="$CYGWIN_VC_INSTALL_DIR"
+  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+    unix_path=`$CYGPATH -u "$windows_path"`
+    CYGWIN_VC_INSTALL_DIR="$unix_path"
+  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+    unix_path=`$ECHO "$windows_path" | $SED -e 's,^\\(.\\):,/\\1,g' -e 's,\\\\,/,g'`
+    CYGWIN_VC_INSTALL_DIR="$unix_path"
+  fi
+
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
+        POSSIBLE_MSVC_DLL="$CYGWIN_VC_INSTALL_DIR/redist/x64/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME"
+      else
+        POSSIBLE_MSVC_DLL="$CYGWIN_VC_INSTALL_DIR/redist/x86/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME"
+      fi
+      $ECHO "POSSIBLE_MSVC_DLL $POSSIBLEMSVC_DLL"
+
+  DLL_NAME="$DLL_NAME"
+  POSSIBLE_MSVC_DLL="$POSSIBLE_MSVC_DLL"
+  METHOD="well-known location in VCINSTALLDIR"
+  if test -n "$POSSIBLE_MSVC_DLL" -a -e "$POSSIBLE_MSVC_DLL"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&5
+$as_echo "$as_me: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&6;}
+
+    # Need to check if the found msvcr is correct architecture
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking found $DLL_NAME architecture" >&5
+$as_echo_n "checking found $DLL_NAME architecture... " >&6; }
+    MSVC_DLL_FILETYPE=`$FILE -b "$POSSIBLE_MSVC_DLL"`
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+      # The MSYS 'file' command returns "PE32 executable for MS Windows (DLL) (GUI) Intel 80386 32-bit"
+      # on x32 and "PE32+ executable for MS Windows (DLL) (GUI) Mono/.Net assembly" on x64 systems.
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH="PE32 executable"
+      else
+        CORRECT_MSVCR_ARCH="PE32+ executable"
+      fi
+    else
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH=386
+      else
+        CORRECT_MSVCR_ARCH=x86-64
+      fi
+    fi
+    if $ECHO "$MSVC_DLL_FILETYPE" | $GREP "$CORRECT_MSVCR_ARCH" 2>&1 > /dev/null; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+$as_echo "ok" >&6; }
+      MSVC_DLL="$POSSIBLE_MSVC_DLL"
+
+  # Only process if variable expands to non-empty
+
+  if test "x$MSVC_DLL" != x; then
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+
+  # Input might be given as Windows format, start by converting to
+  # unix format.
+  path="$MSVC_DLL"
+  new_path=`$CYGPATH -u "$path"`
+
+  # Cygwin tries to hide some aspects of the Windows file system, such that binaries are
+  # named .exe but called without that suffix. Therefore, "foo" and "foo.exe" are considered
+  # the same file, most of the time (as in "test -f"). But not when running cygpath -s, then
+  # "foo.exe" is OK but "foo" is an error.
+  #
+  # This test is therefore slightly more accurate than "test -f" to check for file precense.
+  # It is also a way to make sure we got the proper file name for the real test later on.
+  test_shortpath=`$CYGPATH -s -m "$new_path" 2> /dev/null`
+  if test "x$test_shortpath" = x; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+    as_fn_error $? "Cannot locate the the path of MSVC_DLL" "$LINENO" 5
+  fi
+
+  # Call helper function which possibly converts this using DOS-style short mode.
+  # If so, the updated path is stored in $new_path.
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-._/a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    shortmode_path=`$CYGPATH -s -m -a "$input_path"`
+    path_after_shortmode=`$CYGPATH -u "$shortmode_path"`
+    if test "x$path_after_shortmode" != "x$input_to_shortpath"; then
+      # Going to short mode and back again did indeed matter. Since short mode is
+      # case insensitive, let's make it lowercase to improve readability.
+      shortmode_path=`$ECHO "$shortmode_path" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+      # Now convert it back to Unix-style (cygpath)
+      input_path=`$CYGPATH -u "$shortmode_path"`
+      new_path="$input_path"
+    fi
+  fi
+
+  test_cygdrive_prefix=`$ECHO $input_path | $GREP ^/cygdrive/`
+  if test "x$test_cygdrive_prefix" = x; then
+    # As a simple fix, exclude /usr/bin since it's not a real path.
+    if test "x`$ECHO $new_path | $GREP ^/usr/bin/`" = x; then
+      # The path is in a Cygwin special directory (e.g. /home). We need this converted to
+      # a path prefixed by /cygdrive for fixpath to work.
+      new_path="$CYGWIN_ROOT_PATH$input_path"
+    fi
+  fi
+
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+    elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+
+  path="$MSVC_DLL"
+  has_colon=`$ECHO $path | $GREP ^.:`
+  new_path="$path"
+  if test "x$has_colon" = x; then
+    # Not in mixed or Windows style, start by that.
+    new_path=`cmd //c echo $path`
+  fi
+
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-_/:a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    new_path=`cmd /c "for %A in (\"$input_path\") do @echo %~sA"|$TR \\\\\\\\ / | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+  fi
+
+
+  windows_path="$new_path"
+  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+    unix_path=`$CYGPATH -u "$windows_path"`
+    new_path="$unix_path"
+  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+    unix_path=`$ECHO "$windows_path" | $SED -e 's,^\\(.\\):,/\\1,g' -e 's,\\\\,/,g'`
+    new_path="$unix_path"
+  fi
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+  # Save the first 10 bytes of this path to the storage, so fixpath can work.
+  all_fixpath_prefixes=("${all_fixpath_prefixes[@]}" "${new_path:0:10}")
+
+    else
+      # We're on a unix platform. Hooray! :)
+      path="$MSVC_DLL"
+      has_space=`$ECHO "$path" | $GREP " "`
+      if test "x$has_space" != x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+        as_fn_error $? "Spaces are not allowed in this path." "$LINENO" 5
+      fi
+
+      # Use eval to expand a potential ~
+      eval path="$path"
+      if test ! -f "$path" && test ! -d "$path"; then
+        as_fn_error $? "The path of MSVC_DLL, which resolves as \"$path\", is not found." "$LINENO" 5
+      fi
+
+      MSVC_DLL="`cd "$path"; $THEPWDCMD -L`"
+    fi
+  fi
+
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $DLL_NAME" >&5
+$as_echo_n "checking for $DLL_NAME... " >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MSVC_DLL" >&5
+$as_echo "$MSVC_DLL" >&6; }
+    else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: incorrect, ignoring" >&5
+$as_echo "incorrect, ignoring" >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&5
+$as_echo "$as_me: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&6;}
+    fi
+  fi
+
+    fi
+  fi
+
+  if test "x$MSVC_DLL" = x; then
+    # Probe: Check in the Boot JDK directory.
+    POSSIBLE_MSVC_DLL="$BOOT_JDK/bin/$DLL_NAME"
+
+  DLL_NAME="$DLL_NAME"
+  POSSIBLE_MSVC_DLL="$POSSIBLE_MSVC_DLL"
+  METHOD="well-known location in Boot JDK"
+  if test -n "$POSSIBLE_MSVC_DLL" -a -e "$POSSIBLE_MSVC_DLL"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&5
+$as_echo "$as_me: Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD" >&6;}
+
+    # Need to check if the found msvcr is correct architecture
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking found $DLL_NAME architecture" >&5
+$as_echo_n "checking found $DLL_NAME architecture... " >&6; }
+    MSVC_DLL_FILETYPE=`$FILE -b "$POSSIBLE_MSVC_DLL"`
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+      # The MSYS 'file' command returns "PE32 executable for MS Windows (DLL) (GUI) Intel 80386 32-bit"
+      # on x32 and "PE32+ executable for MS Windows (DLL) (GUI) Mono/.Net assembly" on x64 systems.
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH="PE32 executable"
+      else
+        CORRECT_MSVCR_ARCH="PE32+ executable"
+      fi
+    else
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
+        CORRECT_MSVCR_ARCH=386
+      else
+        CORRECT_MSVCR_ARCH=x86-64
+      fi
+    fi
+    if $ECHO "$MSVC_DLL_FILETYPE" | $GREP "$CORRECT_MSVCR_ARCH" 2>&1 > /dev/null; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+$as_echo "ok" >&6; }
+      MSVC_DLL="$POSSIBLE_MSVC_DLL"
+
+  # Only process if variable expands to non-empty
+
+  if test "x$MSVC_DLL" != x; then
+    if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+
+  # Input might be given as Windows format, start by converting to
+  # unix format.
+  path="$MSVC_DLL"
+  new_path=`$CYGPATH -u "$path"`
+
+  # Cygwin tries to hide some aspects of the Windows file system, such that binaries are
+  # named .exe but called without that suffix. Therefore, "foo" and "foo.exe" are considered
+  # the same file, most of the time (as in "test -f"). But not when running cygpath -s, then
+  # "foo.exe" is OK but "foo" is an error.
+  #
+  # This test is therefore slightly more accurate than "test -f" to check for file precense.
+  # It is also a way to make sure we got the proper file name for the real test later on.
+  test_shortpath=`$CYGPATH -s -m "$new_path" 2> /dev/null`
+  if test "x$test_shortpath" = x; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+    as_fn_error $? "Cannot locate the the path of MSVC_DLL" "$LINENO" 5
+  fi
+
+  # Call helper function which possibly converts this using DOS-style short mode.
+  # If so, the updated path is stored in $new_path.
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-._/a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    shortmode_path=`$CYGPATH -s -m -a "$input_path"`
+    path_after_shortmode=`$CYGPATH -u "$shortmode_path"`
+    if test "x$path_after_shortmode" != "x$input_to_shortpath"; then
+      # Going to short mode and back again did indeed matter. Since short mode is
+      # case insensitive, let's make it lowercase to improve readability.
+      shortmode_path=`$ECHO "$shortmode_path" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+      # Now convert it back to Unix-style (cygpath)
+      input_path=`$CYGPATH -u "$shortmode_path"`
+      new_path="$input_path"
+    fi
+  fi
+
+  test_cygdrive_prefix=`$ECHO $input_path | $GREP ^/cygdrive/`
+  if test "x$test_cygdrive_prefix" = x; then
+    # As a simple fix, exclude /usr/bin since it's not a real path.
+    if test "x`$ECHO $new_path | $GREP ^/usr/bin/`" = x; then
+      # The path is in a Cygwin special directory (e.g. /home). We need this converted to
+      # a path prefixed by /cygdrive for fixpath to work.
+      new_path="$CYGWIN_ROOT_PATH$input_path"
+    fi
+  fi
+
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+    elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+
+  path="$MSVC_DLL"
+  has_colon=`$ECHO $path | $GREP ^.:`
+  new_path="$path"
+  if test "x$has_colon" = x; then
+    # Not in mixed or Windows style, start by that.
+    new_path=`cmd //c echo $path`
+  fi
+
+
+  input_path="$new_path"
+  # Check if we need to convert this using DOS-style short mode. If the path
+  # contains just simple characters, use it. Otherwise (spaces, weird characters),
+  # take no chances and rewrite it.
+  # Note: m4 eats our [], so we need to use [ and ] instead.
+  has_forbidden_chars=`$ECHO "$input_path" | $GREP [^-_/:a-zA-Z0-9]`
+  if test "x$has_forbidden_chars" != x; then
+    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
+    new_path=`cmd /c "for %A in (\"$input_path\") do @echo %~sA"|$TR \\\\\\\\ / | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
+  fi
+
+
+  windows_path="$new_path"
+  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
+    unix_path=`$CYGPATH -u "$windows_path"`
+    new_path="$unix_path"
+  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
+    unix_path=`$ECHO "$windows_path" | $SED -e 's,^\\(.\\):,/\\1,g' -e 's,\\\\,/,g'`
+    new_path="$unix_path"
+  fi
+
+  if test "x$path" != "x$new_path"; then
+    MSVC_DLL="$new_path"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Rewriting MSVC_DLL to \"$new_path\"" >&5
+$as_echo "$as_me: Rewriting MSVC_DLL to \"$new_path\"" >&6;}
+  fi
+
+  # Save the first 10 bytes of this path to the storage, so fixpath can work.
+  all_fixpath_prefixes=("${all_fixpath_prefixes[@]}" "${new_path:0:10}")
+
+    else
+      # We're on a unix platform. Hooray! :)
+      path="$MSVC_DLL"
+      has_space=`$ECHO "$path" | $GREP " "`
+      if test "x$has_space" != x; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&5
+$as_echo "$as_me: The path of MSVC_DLL, which resolves as \"$path\", is invalid." >&6;}
+        as_fn_error $? "Spaces are not allowed in this path." "$LINENO" 5
+      fi
+
+      # Use eval to expand a potential ~
+      eval path="$path"
+      if test ! -f "$path" && test ! -d "$path"; then
+        as_fn_error $? "The path of MSVC_DLL, which resolves as \"$path\", is not found." "$LINENO" 5
+      fi
+
+      MSVC_DLL="`cd "$path"; $THEPWDCMD -L`"
+    fi
+  fi
+
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $DLL_NAME" >&5
+$as_echo_n "checking for $DLL_NAME... " >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MSVC_DLL" >&5
+$as_echo "$MSVC_DLL" >&6; }
+    else
+      { $as_echo "$as_me:${as_lineno-$LINENO}: result: incorrect, ignoring" >&5
+$as_echo "incorrect, ignoring" >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&5
+$as_echo "$as_me: The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE" >&6;}
+    fi
+  fi
+
+  fi
+
+  if test "x$MSVC_DLL" = x; then
+    # Probe: Look in the Windows system32 directory
+    CYGWIN_SYSTEMROOT="$SYSTEMROOT"