changeset 2303:ecf6f15f5d5d

Merge
author aefimov
date Sat, 04 Aug 2018 12:52:41 +0100
parents d6a70178d360 8ea6a32042c6
children 49178e2b8f4d
files .hgtags
diffstat 27 files changed, 25051 insertions(+), 8651 deletions(-) [+]
line wrap: on
line diff
--- a/.hgtags	Fri Jul 27 11:46:51 2018 +0100
+++ b/.hgtags	Sat Aug 04 12:52:41 2018 +0100
@@ -882,3 +882,10 @@
 d6007fa4ffae140f4c4ad551a1ee290a0704a094 jdk8u201-b00
 d6007fa4ffae140f4c4ad551a1ee290a0704a094 jdk8u191-b02
 99395ddbb670d9621c9755afa330c579a57dfd9b jdk8u191-b03
+25e7fdd40996864b76cce08ba688f6e8281097a6 jdk8u191-b04
+3b5b53db61f2aaa5a94fd9ca51162d83565faabe jdk8u182-b00
+dcfe85bcd9017741198b4e4a2045fdaaab212c74 jdk8u192-b00
+7abd14dd301d8a927450a7623c2e5913a5bfa891 jdk8u192-b01
+1380ce862bbd0b65c619bfcea454d612b240e332 jdk8u192-b02
+6d8d269ee313fb1420375c2a81dd71c0b660a65f jdk8u192-b03
+866ed739fa56f9c9d807c70078d28e2e5f52bdcb jdk8u192-b04
--- a/common/autoconf/Makefile.in	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/Makefile.in	Sat Aug 04 12:52:41 2018 +0100
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2014, 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
@@ -24,4 +24,4 @@
 # This Makefile was generated by configure @DATE_WHEN_CONFIGURED@
 # GENERATED FILE, DO NOT EDIT
 SPEC:=@OUTPUT_ROOT@/spec.gmk
-include @SRC_ROOT@/Makefile
+include @TOPDIR@/Makefile
--- a/common/autoconf/autogen.sh	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/autogen.sh	Sat Aug 04 12:52:41 2018 +0100
@@ -22,6 +22,23 @@
 # questions.
 #
 
+generate_configure_script() {
+  # First create a header
+  cat > $1 << EOT
+#!/bin/bash
+#
+# ##########################################################
+# ### THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT. ###
+# ##########################################################
+#
+EOT
+  # Then replace "magic" variables in configure.ac and append the output
+  # from autoconf. $2 is either cat (just a no-op) or a filter.
+  cat $script_dir/configure.ac | sed -e "s|@DATE_WHEN_GENERATED@|$TIMESTAMP|" | \
+      eval $2 | ${AUTOCONF} -W all -I$script_dir - >> $1
+  rm -rf autom4te.cache
+}
+
 script_dir=`dirname $0`
 
 # Create a timestamp as seconds since epoch
@@ -36,7 +53,8 @@
 fi
 
 if test "x$CUSTOM_CONFIG_DIR" = "x"; then
-  custom_script_dir="$script_dir/../../jdk/make/closed/autoconf"
+  topdir=`cd $script_dir/../..  >/dev/null && pwd`
+  custom_script_dir="$topdir/jdk/make/closed/autoconf"
 else
   custom_script_dir=$CUSTOM_CONFIG_DIR
 fi
@@ -45,25 +63,23 @@
 
 AUTOCONF="`which autoconf 2> /dev/null | grep -v '^no autoconf in'`"
 
-echo "Autoconf found: ${AUTOCONF}"
-
 if test "x${AUTOCONF}" = x; then
-  echo You need autoconf installed to be able to regenerate the configure script
-  echo Error: Cannot find autoconf 1>&2
+  echo "You need autoconf installed to be able to regenerate the configure script"
+  echo "Error: Cannot find autoconf" 1>&2
   exit 1
 fi
 
-echo Generating generated-configure.sh with ${AUTOCONF}
-cat $script_dir/configure.ac  | sed -e "s|@DATE_WHEN_GENERATED@|$TIMESTAMP|" | ${AUTOCONF} -W all -I$script_dir - > $script_dir/generated-configure.sh
-rm -rf autom4te.cache
+autoconf_version=`$AUTOCONF --version | head -1`
+echo "Using autoconf at ${AUTOCONF} [$autoconf_version]"
+
+echo "Generating generated-configure.sh"
+generate_configure_script "$script_dir/generated-configure.sh" 'cat'
 
 if test -e $custom_hook; then
-  echo Generating custom generated-configure.sh
   # We have custom sources available; also generate configure script
   # with custom hooks compiled in.
-  cat $script_dir/configure.ac | sed -e "s|@DATE_WHEN_GENERATED@|$TIMESTAMP|" | \
-      sed -e "s|#CUSTOM_AUTOCONF_INCLUDE|m4_include([$custom_hook])|" | ${AUTOCONF} -W all -I$script_dir - > $custom_script_dir/generated-configure.sh
-  rm -rf autom4te.cache
+  echo "Generating custom generated-configure.sh"
+  generate_configure_script "$custom_script_dir/generated-configure.sh" 'sed -e "s|#CUSTOM_AUTOCONF_INCLUDE|m4_include([$custom_hook])|"'
 else
-  echo No custom hook found:  $custom_hook
+  echo "(No custom hook found at $custom_hook)"
 fi
--- a/common/autoconf/basics.m4	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/basics.m4	Sat Aug 04 12:52:41 2018 +0100
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -46,10 +46,24 @@
 # Appends a string to a path variable, only adding the : when needed.
 AC_DEFUN([BASIC_APPEND_TO_PATH],
 [
-  if test "x[$]$1" = x; then
-    $1="$2"
-  else
-    $1="[$]$1:$2"
+  if test "x$2" != x; then
+    if test "x[$]$1" = x; then
+      $1="$2"
+    else
+      $1="[$]$1:$2"
+    fi
+  fi
+])
+
+# Prepends a string to a path variable, only adding the : when needed.
+AC_DEFUN([BASIC_PREPEND_TO_PATH],
+[
+  if test "x$2" != x; then
+    if test "x[$]$1" = x; then
+      $1="$2"
+    else
+      $1="$2:[$]$1"
+    fi
   fi
 ])
 
@@ -126,7 +140,7 @@
       done
       IFS="$IFS_save"
     else
-      AC_MSG_NOTICE([Resolving $1 (as $path) failed, using $path directly.])
+      # This is an absolute path, we can use it without further modifications.
       new_path="$path"
     fi
 
@@ -236,35 +250,119 @@
 
 # Test that variable $1 denoting a program is not empty. If empty, exit with an error.
 # $1: variable to check
-# $2: executable name to print in warning (optional)
 AC_DEFUN([BASIC_CHECK_NONEMPTY],
 [
   if test "x[$]$1" = x; then
-    if test "x$2" = x; then
-      PROG_NAME=translit($1,A-Z,a-z)
-    else
-      PROG_NAME=$2
-    fi
-    AC_MSG_NOTICE([Could not find $PROG_NAME!])
-    AC_MSG_ERROR([Cannot continue])
+    AC_MSG_ERROR([Could not find required tool for $1])
   fi
 ])
 
-# Does AC_PATH_PROG followed by BASIC_CHECK_NONEMPTY.
-# Arguments as AC_PATH_PROG:
+# Check that there are no unprocessed overridden variables left.
+# If so, they are an incorrect argument and we will exit with an error.
+AC_DEFUN([BASIC_CHECK_LEFTOVER_OVERRIDDEN],
+[
+  if test "x$CONFIGURE_OVERRIDDEN_VARIABLES" != x; then
+    # Replace the separating ! with spaces before presenting for end user.
+    unknown_variables=${CONFIGURE_OVERRIDDEN_VARIABLES//!/ }
+    AC_MSG_WARN([The following variables might be unknown to configure: $unknown_variables])
+  fi
+])
+
+# Setup a tool for the given variable. If correctly specified by the user, 
+# use that value, otherwise search for the tool using the supplied code snippet.
 # $1: variable to set
-# $2: executable name to look for
-AC_DEFUN([BASIC_REQUIRE_PROG],
+# $2: code snippet to call to look for the tool
+AC_DEFUN([BASIC_SETUP_TOOL],
 [
-  AC_PATH_PROGS($1, $2)
-  BASIC_CHECK_NONEMPTY($1, $2)
+  # Publish this variable in the help.
+  AC_ARG_VAR($1, [Override default value for $1])
+
+  if test "x[$]$1" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    $2
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !$1! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!$1!/}
+    if test "x$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 "x$1" != xBASH; then
+        AC_MSG_WARN([Ignoring value of $1 from the environment. Use command line variables instead.])
+      fi
+      # Try to locate tool using the code snippet
+      $2
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if 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
+    fi
+  fi
+])
+
+# Call BASIC_SETUP_TOOL with AC_PATH_PROGS to locate the tool
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+AC_DEFUN([BASIC_PATH_PROGS],
+[
+  BASIC_SETUP_TOOL($1, [AC_PATH_PROGS($1, $2)])
+])
+
+# Call BASIC_SETUP_TOOL with AC_CHECK_TOOLS to locate the tool
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+AC_DEFUN([BASIC_CHECK_TOOLS],
+[
+  BASIC_SETUP_TOOL($1, [AC_CHECK_TOOLS($1, $2)])
+])
+
+# Like BASIC_PATH_PROGS but fails if no tool was found.
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+AC_DEFUN([BASIC_REQUIRE_PROGS],
+[
+  BASIC_PATH_PROGS($1, $2)
+  BASIC_CHECK_NONEMPTY($1)
+])
+
+# Like BASIC_SETUP_TOOL but fails if no tool was found.
+# $1: variable to set
+# $2: autoconf macro to call to look for the special tool
+AC_DEFUN([BASIC_REQUIRE_SPECIAL],
+[
+  BASIC_SETUP_TOOL($1, [$2])
+  BASIC_CHECK_NONEMPTY($1)
 ])
 
 # Setup the most fundamental tools that relies on not much else to set up,
 # but is used by much of the early bootstrap code.
 AC_DEFUN_ONCE([BASIC_SETUP_FUNDAMENTAL_TOOLS],
 [
-
   # 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
@@ -272,57 +370,49 @@
   # needed to download the devkit.
 
   # First are all the simple required tools.
-  BASIC_REQUIRE_PROG(BASENAME, basename)
-  BASIC_REQUIRE_PROG(BASH, bash)
-  BASIC_REQUIRE_PROG(CAT, cat)
-  BASIC_REQUIRE_PROG(CHMOD, chmod)
-  BASIC_REQUIRE_PROG(CMP, cmp)
-  BASIC_REQUIRE_PROG(COMM, comm)
-  BASIC_REQUIRE_PROG(CP, cp)
-  BASIC_REQUIRE_PROG(CPIO, cpio)
-  BASIC_REQUIRE_PROG(CUT, cut)
-  BASIC_REQUIRE_PROG(DATE, date)
-  BASIC_REQUIRE_PROG(DIFF, [gdiff diff])
-  BASIC_REQUIRE_PROG(DIRNAME, dirname)
-  BASIC_REQUIRE_PROG(ECHO, echo)
-  BASIC_REQUIRE_PROG(EXPR, expr)
-  BASIC_REQUIRE_PROG(FILE, file)
-  BASIC_REQUIRE_PROG(FIND, find)
-  BASIC_REQUIRE_PROG(HEAD, head)
-  BASIC_REQUIRE_PROG(LN, ln)
-  BASIC_REQUIRE_PROG(LS, ls)
-  BASIC_REQUIRE_PROG(MKDIR, mkdir)
-  BASIC_REQUIRE_PROG(MKTEMP, mktemp)
-  BASIC_REQUIRE_PROG(MV, mv)
-  BASIC_REQUIRE_PROG(PRINTF, printf)
-  BASIC_REQUIRE_PROG(RM, rm)
-  BASIC_REQUIRE_PROG(SH, sh)
-  BASIC_REQUIRE_PROG(SORT, sort)
-  BASIC_REQUIRE_PROG(TAIL, tail)
-  BASIC_REQUIRE_PROG(TAR, tar)
-  BASIC_REQUIRE_PROG(TEE, tee)
-  BASIC_REQUIRE_PROG(TOUCH, touch)
-  BASIC_REQUIRE_PROG(TR, tr)
-  BASIC_REQUIRE_PROG(UNAME, uname)
-  BASIC_REQUIRE_PROG(UNIQ, uniq)
-  BASIC_REQUIRE_PROG(WC, wc)
-  BASIC_REQUIRE_PROG(WHICH, which)
-  BASIC_REQUIRE_PROG(XARGS, xargs)
+  BASIC_REQUIRE_PROGS(BASENAME, basename)
+  BASIC_REQUIRE_PROGS(BASH, bash)
+  BASIC_REQUIRE_PROGS(CAT, cat)
+  BASIC_REQUIRE_PROGS(CHMOD, chmod)
+  BASIC_REQUIRE_PROGS(CMP, cmp)
+  BASIC_REQUIRE_PROGS(COMM, comm)
+  BASIC_REQUIRE_PROGS(CP, cp)
+  BASIC_REQUIRE_PROGS(CUT, cut)
+  BASIC_REQUIRE_PROGS(DATE, date)
+  BASIC_REQUIRE_PROGS(DIFF, [gdiff diff])
+  BASIC_REQUIRE_PROGS(DIRNAME, dirname)
+  BASIC_REQUIRE_PROGS(ECHO, echo)
+  BASIC_REQUIRE_PROGS(EXPR, expr)
+  BASIC_REQUIRE_PROGS(FILE, file)
+  BASIC_REQUIRE_PROGS(FIND, find)
+  BASIC_REQUIRE_PROGS(HEAD, head)
+  BASIC_REQUIRE_PROGS(LN, ln)
+  BASIC_REQUIRE_PROGS(LS, ls)
+  BASIC_REQUIRE_PROGS(MKDIR, mkdir)
+  BASIC_REQUIRE_PROGS(MKTEMP, mktemp)
+  BASIC_REQUIRE_PROGS(MV, mv)
+  BASIC_REQUIRE_PROGS(NAWK, [nawk gawk awk])
+  BASIC_REQUIRE_PROGS(PRINTF, printf)
+  BASIC_REQUIRE_PROGS(RM, rm)
+  BASIC_REQUIRE_PROGS(SH, sh)
+  BASIC_REQUIRE_PROGS(SORT, sort)
+  BASIC_REQUIRE_PROGS(TAIL, tail)
+  BASIC_REQUIRE_PROGS(TAR, tar)
+  BASIC_REQUIRE_PROGS(TEE, tee)
+  BASIC_REQUIRE_PROGS(TOUCH, touch)
+  BASIC_REQUIRE_PROGS(TR, tr)
+  BASIC_REQUIRE_PROGS(UNAME, uname)
+  BASIC_REQUIRE_PROGS(UNIQ, uniq)
+  BASIC_REQUIRE_PROGS(WC, wc)
+  BASIC_REQUIRE_PROGS(WHICH, which)
+  BASIC_REQUIRE_PROGS(XARGS, xargs)
 
   # Then required tools that require some special treatment.
-  AC_PROG_AWK
-  BASIC_CHECK_NONEMPTY(AWK)
-  AC_PROG_GREP
-  BASIC_CHECK_NONEMPTY(GREP)
-  AC_PROG_EGREP
-  BASIC_CHECK_NONEMPTY(EGREP)
-  AC_PROG_FGREP
-  BASIC_CHECK_NONEMPTY(FGREP)
-  AC_PROG_SED
-  BASIC_CHECK_NONEMPTY(SED)
-
-  AC_PATH_PROGS(NAWK, [nawk gawk awk])
-  BASIC_CHECK_NONEMPTY(NAWK)
+  BASIC_REQUIRE_SPECIAL(AWK, [AC_PROG_AWK])
+  BASIC_REQUIRE_SPECIAL(GREP, [AC_PROG_GREP])
+  BASIC_REQUIRE_SPECIAL(EGREP, [AC_PROG_EGREP])
+  BASIC_REQUIRE_SPECIAL(FGREP, [AC_PROG_FGREP])
+  BASIC_REQUIRE_SPECIAL(SED, [AC_PROG_SED])
 
   # Always force rm.
   RM="$RM -f"
@@ -332,23 +422,18 @@
   THEPWDCMD=pwd
 
   # These are not required on all platforms
-  AC_PATH_PROG(CYGPATH, cygpath)
-  AC_PATH_PROG(READLINK, readlink)
-  AC_PATH_PROG(DF, df)
-  AC_PATH_PROG(SETFILE, SetFile)
+  BASIC_PATH_PROGS(CYGPATH, cygpath)
+  BASIC_PATH_PROGS(READLINK, [greadlink readlink])
+  BASIC_PATH_PROGS(DF, df)
+  BASIC_PATH_PROGS(SETFILE, SetFile)
+  BASIC_PATH_PROGS(CPIO, [cpio bsdcpio])
 ])
 
 # Setup basic configuration paths, and platform-specific stuff related to PATHs.
 AC_DEFUN_ONCE([BASIC_SETUP_PATHS],
 [
-  # Locate the directory of this script.
-  SCRIPT="[$]0"
-  AUTOCONF_DIR=`cd \`$DIRNAME $SCRIPT\`; $THEPWDCMD -L`
-
-  # Where is the source? It is located two levels above the configure script.
+  # Save the current directory this script was started from
   CURDIR="$PWD"
-  cd "$AUTOCONF_DIR/../.."
-  SRC_ROOT="`$THEPWDCMD -L`"
 
   if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
     PATH_SEP=";"
@@ -356,56 +441,148 @@
   else
     PATH_SEP=":"
   fi
+  AC_SUBST(PATH_SEP)
 
-  AC_SUBST(SRC_ROOT)
-  AC_SUBST(PATH_SEP)
-  cd "$CURDIR"
+  # We get the top-level directory from the supporting wrappers.
+  AC_MSG_CHECKING([for top-level directory])
+  AC_MSG_RESULT([$TOPDIR])
+  AC_SUBST(TOPDIR)
 
-  BASIC_FIXUP_PATH(SRC_ROOT)
+  # We can only call BASIC_FIXUP_PATH after BASIC_CHECK_PATHS_WINDOWS.
   BASIC_FIXUP_PATH(CURDIR)
+  BASIC_FIXUP_PATH(TOPDIR)
+  # SRC_ROOT is a traditional alias for TOPDIR.
+  SRC_ROOT=$TOPDIR
+
+  # Locate the directory of this script.
+  AUTOCONF_DIR=$TOPDIR/common/autoconf
+])
+
+# Evaluates platform specific overrides for devkit variables.
+# $1: Name of variable
+AC_DEFUN([BASIC_EVAL_DEVKIT_VARIABLE],
+[
+  if test "x[$]$1" = x; then
+    eval $1="\${$1_${OPENJDK_TARGET_CPU}}"
+  fi
+])
+
+AC_DEFUN_ONCE([BASIC_SETUP_DEVKIT],
+[
+  AC_ARG_WITH([devkit], [AS_HELP_STRING([--with-devkit],
+      [use this devkit for compilers, tools and resources])])
+
+  if test "x$with_devkit" = xyes; then
+    AC_MSG_ERROR([--with-devkit must have a value])
+  elif test "x$with_devkit" != x && test "x$with_devkit" != xno; then
+    BASIC_FIXUP_PATH([with_devkit])
+    DEVKIT_ROOT="$with_devkit"
+    # Check for a meta data info file in the root of the devkit
+    if test -f "$DEVKIT_ROOT/devkit.info"; then
+      . $DEVKIT_ROOT/devkit.info
+      # This potentially sets the following:
+      # A descriptive name of the devkit
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_NAME])
+      # Corresponds to --with-extra-path
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_EXTRA_PATH])
+      # Corresponds to --with-toolchain-path
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_TOOLCHAIN_PATH])
+      # Corresponds to --with-sysroot
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_SYSROOT])
+
+      # Identifies the Visual Studio version in the devkit
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_VS_VERSION])
+      # The Visual Studio include environment variable
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_VS_INCLUDE])
+      # The Visual Studio lib environment variable
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_VS_LIB])
+      # Corresponds to --with-msvcr-dll
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_MSVCR_DLL])
+      # Corresponds to --with-msvcp-dll
+      BASIC_EVAL_DEVKIT_VARIABLE([DEVKIT_MSVCP_DLL])
+    fi
+
+    AC_MSG_CHECKING([for devkit])
+    if test "x$DEVKIT_NAME" != x; then
+      AC_MSG_RESULT([$DEVKIT_NAME in $DEVKIT_ROOT])
+    else
+      AC_MSG_RESULT([$DEVKIT_ROOT])
+    fi
+
+    BASIC_PREPEND_TO_PATH([EXTRA_PATH],$DEVKIT_EXTRA_PATH)
+
+    # Fallback default of just /bin if DEVKIT_PATH is not defined
+    if test "x$DEVKIT_TOOLCHAIN_PATH" = x; then
+      DEVKIT_TOOLCHAIN_PATH="$DEVKIT_ROOT/bin"
+    fi
+    BASIC_PREPEND_TO_PATH([TOOLCHAIN_PATH],$DEVKIT_TOOLCHAIN_PATH)
+
+    # If DEVKIT_SYSROOT is set, use that, otherwise try a couple of known
+    # places for backwards compatiblity.
+    if test "x$DEVKIT_SYSROOT" != x; then
+      SYSROOT="$DEVKIT_SYSROOT"
+    elif test -d "$DEVKIT_ROOT/$host_alias/libc"; then
+      SYSROOT="$DEVKIT_ROOT/$host_alias/libc"
+    elif test -d "$DEVKIT_ROOT/$host/sys-root"; then
+      SYSROOT="$DEVKIT_ROOT/$host/sys-root"
+    fi
+
+    if test "x$DEVKIT_ROOT" != x; then
+      DEVKIT_LIB_DIR="$DEVKIT_ROOT/lib"
+      if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
+        DEVKIT_LIB_DIR="$DEVKIT_ROOT/lib64"
+      fi
+      AC_SUBST(DEVKIT_LIB_DIR)
+    fi
+  fi
+
+  # You can force the sysroot if the sysroot encoded into the compiler tools
+  # is not correct.
+  AC_ARG_WITH(sys-root, [AS_HELP_STRING([--with-sys-root],
+      [alias for --with-sysroot for backwards compatability])],
+      [SYSROOT=$with_sys_root]
+  )
+
+  AC_ARG_WITH(sysroot, [AS_HELP_STRING([--with-sysroot],
+      [use this directory as sysroot)])],
+      [SYSROOT=$with_sysroot]
+  )
+
+  AC_ARG_WITH([tools-dir], [AS_HELP_STRING([--with-tools-dir],
+      [alias for --with-toolchain-path for backwards compatibility])],
+      [BASIC_PREPEND_TO_PATH([TOOLCHAIN_PATH],$with_tools_dir)]
+  )
+
+  AC_ARG_WITH([toolchain-path], [AS_HELP_STRING([--with-toolchain-path],
+      [prepend these directories when searching for toolchain binaries (compilers etc)])],
+      [BASIC_PREPEND_TO_PATH([TOOLCHAIN_PATH],$with_toolchain_path)]
+  )
+
+  AC_ARG_WITH([extra-path], [AS_HELP_STRING([--with-extra-path],
+      [prepend these directories to the default path])],
+      [BASIC_PREPEND_TO_PATH([EXTRA_PATH],$with_extra_path)]
+  )
+
+  # Prepend the extra path to the global path
+  BASIC_PREPEND_TO_PATH([PATH],$EXTRA_PATH)
 
   if test "x$OPENJDK_BUILD_OS" = "xsolaris"; then
     # Add extra search paths on solaris for utilities like ar and as etc...
     PATH="$PATH:/usr/ccs/bin:/usr/sfw/bin:/opt/csw/bin"
   fi
 
-  # You can force the sys-root if the sys-root encoded into the cross compiler tools
-  # is not correct.
-  AC_ARG_WITH(sys-root, [AS_HELP_STRING([--with-sys-root],
-      [pass this sys-root to the compilers and tools (for cross-compiling)])])
-
-  if test "x$with_sys_root" != x; then
-    SYS_ROOT=$with_sys_root
-  else
-    SYS_ROOT=/
-  fi
-  AC_SUBST(SYS_ROOT)
-
-  AC_ARG_WITH([tools-dir], [AS_HELP_STRING([--with-tools-dir],
-      [search this directory for compilers and tools (for cross-compiling)])],
-      [TOOLS_DIR=$with_tools_dir]
-  )
-
   # Xcode version will be validated later
   AC_ARG_WITH([xcode-path], [AS_HELP_STRING([--with-xcode-path],
       [explicit path to Xcode 4 (generally for building on 10.9 and later)])],
       [XCODE_PATH=$with_xcode_path]
   )
 
-  AC_ARG_WITH([devkit], [AS_HELP_STRING([--with-devkit],
-      [use this directory as base for tools-dir and sys-root (for cross-compiling)])],
-      [
-        if test "x$with_sys_root" != x; then
-          AC_MSG_ERROR([Cannot specify both --with-devkit and --with-sys-root at the same time])
-        fi
-        BASIC_FIXUP_PATH([with_devkit])
-        BASIC_APPEND_TO_PATH([TOOLS_DIR],$with_devkit/bin)
-        if test -d "$with_devkit/$host_alias/libc"; then
-          SYS_ROOT=$with_devkit/$host_alias/libc
-        elif test -d "$with_devkit/$host/sys-root"; then
-          SYS_ROOT=$with_devkit/$host/sys-root
-        fi
-      ])
+  AC_MSG_CHECKING([for sysroot])
+  AC_MSG_RESULT([$SYSROOT])
+  AC_MSG_CHECKING([for toolchain path])
+  AC_MSG_RESULT([$TOOLCHAIN_PATH])
+  AC_MSG_CHECKING([for extra path])
+  AC_MSG_RESULT([$EXTRA_PATH])
 ])
 
 AC_DEFUN_ONCE([BASIC_SETUP_OUTPUT_DIR],
@@ -416,13 +593,17 @@
       [ CONF_NAME=${with_conf_name} ])
 
   # Test from where we are running configure, in or outside of src root.
+  AC_MSG_CHECKING([where to store configuration])
   if test "x$CURDIR" = "x$SRC_ROOT" || test "x$CURDIR" = "x$SRC_ROOT/common" \
       || test "x$CURDIR" = "x$SRC_ROOT/common/autoconf" \
       || test "x$CURDIR" = "x$SRC_ROOT/make" ; then
     # We are running configure from the src root.
     # Create a default ./build/target-variant-debuglevel output root.
     if test "x${CONF_NAME}" = x; then
+      AC_MSG_RESULT([in default location])
       CONF_NAME="${OPENJDK_TARGET_OS}-${OPENJDK_TARGET_CPU}-${JDK_VARIANT}-${ANDED_JVM_VARIANTS}-${DEBUG_LEVEL}"
+    else
+      AC_MSG_RESULT([in build directory with custom name])
     fi
     OUTPUT_ROOT="$SRC_ROOT/build/${CONF_NAME}"
     $MKDIR -p "$OUTPUT_ROOT"
@@ -438,6 +619,7 @@
       CONF_NAME=`$ECHO $CURDIR | $SED -e "s!^${SRC_ROOT}/build/!!"`
     fi
     OUTPUT_ROOT="$CURDIR"
+    AC_MSG_RESULT([in current directory])
 
     # WARNING: This might be a bad thing to do. You need to be sure you want to
     # have a configuration in this directory. Do some sanity checks!
@@ -448,8 +630,12 @@
       files_present=`$LS $OUTPUT_ROOT`
       # Configure has already touched config.log and confdefs.h in the current dir when this check
       # is performed.
-      filtered_files=`$ECHO "$files_present" | $SED -e 's/config.log//g' -e 's/confdefs.h//g' -e 's/ //g' \
-      | $TR -d '\n'`
+      filtered_files=`$ECHO "$files_present" \
+          | $SED -e 's/config.log//g' \
+	      -e 's/confdefs.h//g' \
+	      -e 's/fixpath.exe//g' \
+	      -e 's/ //g' \
+          | $TR -d '\n'`
       if test "x$filtered_files" != x; then
         AC_MSG_NOTICE([Current directory is $CURDIR.])
         AC_MSG_NOTICE([Since this is not the source root, configure will output the configuration here])
@@ -487,9 +673,6 @@
   # You can run make from the OUTPUT_ROOT, or from the top-level Makefile
   # which will look for generated configurations
   AC_CONFIG_FILES([$OUTPUT_ROOT/Makefile:$AUTOCONF_DIR/Makefile.in])
-
-  # Save the arguments given to us
-  echo "$CONFIGURE_COMMAND_LINE" > $OUTPUT_ROOT/configure-arguments
 ])
 
 AC_DEFUN_ONCE([BASIC_SETUP_LOGGING],
@@ -573,10 +756,10 @@
     fi
 
     if test "x$FOUND_MAKE" = x; then
-      if test "x$TOOLS_DIR" != x; then
-        # We have a tools-dir, check that as well before giving up.
+      if test "x$TOOLCHAIN_PATH" != x; then
+        # We have a toolchain path, check that as well before giving up.
         OLD_PATH=$PATH
-        PATH=$TOOLS_DIR:$PATH
+        PATH=$TOOLCHAIN_PATH:$PATH
         AC_PATH_PROGS(CHECK_TOOLSDIR_GMAKE, gmake)
         BASIC_CHECK_MAKE_VERSION("$CHECK_TOOLSDIR_GMAKE", [gmake in tools-dir])
         if test "x$FOUND_MAKE" = x; then
@@ -628,22 +811,22 @@
 
   # These tools might not be installed by default,
   # need hint on how to install them.
-  BASIC_REQUIRE_PROG(UNZIP, unzip)
-  BASIC_REQUIRE_PROG(ZIP, zip)
+  BASIC_REQUIRE_PROGS(UNZIP, unzip)
+  BASIC_REQUIRE_PROGS(ZIP, zip)
 
   # Non-required basic tools
 
-  AC_PATH_PROG(LDD, ldd)
+  BASIC_PATH_PROGS(LDD, ldd)
   if test "x$LDD" = "x"; then
     # List shared lib dependencies is used for
     # debug output and checking for forbidden dependencies.
     # We can build without it.
     LDD="true"
   fi
-  AC_PATH_PROGS(READELF, [readelf greadelf])
-  AC_PATH_PROG(HG, hg)
-  AC_PATH_PROG(STAT, stat)
-  AC_PATH_PROG(TIME, time)
+  BASIC_PATH_PROGS(READELF, [readelf greadelf])
+  BASIC_PATH_PROGS(HG, hg)
+  BASIC_PATH_PROGS(STAT, stat)
+  BASIC_PATH_PROGS(TIME, time)
   # Check if it's GNU time
   IS_GNU_TIME=`$TIME --version 2>&1 | $GREP 'GNU time'`
   if test "x$IS_GNU_TIME" != x; then
@@ -654,13 +837,13 @@
   AC_SUBST(IS_GNU_TIME)
 
   if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
-    BASIC_REQUIRE_PROG(COMM, comm)
+    BASIC_REQUIRE_PROGS(COMM, comm)
   fi
 
   if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
-    BASIC_REQUIRE_PROG(DSYMUTIL, dsymutil)
-    BASIC_REQUIRE_PROG(XATTR, xattr)
-    AC_PATH_PROG(CODESIGN, codesign)
+    BASIC_REQUIRE_PROGS(DSYMUTIL, dsymutil)
+    BASIC_REQUIRE_PROGS(XATTR, xattr)
+    BASIC_PATH_PROGS(CODESIGN, codesign)
     if test "x$CODESIGN" != "x"; then
       # Verify that the openjdk_codesign certificate is present
       AC_MSG_CHECKING([if openjdk_codesign certificate is present])
@@ -712,7 +895,7 @@
 # not be the case in cygwin in certain conditions.
 AC_DEFUN_ONCE([BASIC_CHECK_SRC_PERMS],
 [
-  if test x"$OPENJDK_BUILD_OS" = xwindows; then
+  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
     file_to_test="$SRC_ROOT/LICENSE"
     if test `$STAT -c '%a' "$file_to_test"` -lt 400; then
       AC_MSG_ERROR([Bad file permissions on src files. This is usually caused by cloning the repositories with a non cygwin hg in a directory not created in cygwin.])
@@ -722,6 +905,9 @@
 
 AC_DEFUN_ONCE([BASIC_TEST_USABILITY_ISSUES],
 [
+  # Did user specify any unknown variables?
+  BASIC_CHECK_LEFTOVER_OVERRIDDEN
+
   AC_MSG_CHECKING([if build directory is on local disk])
   BASIC_CHECK_DIR_ON_LOCAL_DISK($OUTPUT_ROOT,
       [OUTPUT_DIR_IS_LOCAL="yes"],
@@ -740,12 +926,4 @@
   else
     IS_RECONFIGURE=no
   fi
-
-  if test -e $SRC_ROOT/build/.hide-configure-performance-hints; then
-    HIDE_PERFORMANCE_HINTS=yes
-  else
-    HIDE_PERFORMANCE_HINTS=no
-    # Hide it the next time around...
-    $TOUCH $SRC_ROOT/build/.hide-configure-performance-hints > /dev/null 2>&1
-  fi
 ])
--- a/common/autoconf/basics_windows.m4	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/basics_windows.m4	Sat Aug 04 12:52:41 2018 +0100
@@ -66,7 +66,7 @@
       # Going to short mode and back again did indeed matter. Since short mode is
       # case insensitive, let's make it lowercase to improve readability.
       shortmode_path=`$ECHO "$shortmode_path" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
-      # Now convert it back to Unix-stile (cygpath)
+      # Now convert it back to Unix-style (cygpath)
       input_path=`$CYGPATH -u "$shortmode_path"`
       new_path="$input_path"
     fi
@@ -266,6 +266,14 @@
     BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(new_path)
 
     new_path=`$WHICH "$new_path" 2> /dev/null`
+    # bat and cmd files are not always considered executable in MSYS causing which
+    # to not find them
+    if test "x$new_path" = x \
+        && test "x`$ECHO \"$path\" | $GREP -i -e \"\\.bat$\" -e \"\\.cmd$\"`" != x \
+        && test "x`$LS \"$path\" 2>/dev/null`" != x; then
+      new_path="$path"
+      BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(new_path)
+    fi
 
     if test "x$new_path" = x; then
       # It's still not found. Now this is an unrecoverable error.
@@ -321,8 +329,8 @@
       AC_MSG_ERROR([Something is wrong with your cygwin installation since I cannot find cygpath.exe in your path])
     fi
     AC_MSG_CHECKING([cygwin root directory as unix-style path])
-    # The cmd output ends with Windows line endings (CR/LF), the grep command will strip that away
-    cygwin_winpath_root=`cd / ; cmd /c cd | grep ".*"`
+    # The cmd output ends with Windows line endings (CR/LF)
+    cygwin_winpath_root=`cd / ; cmd /c cd | $TR -d '\r\n'`
     # Force cygpath to report the proper root by including a trailing space, and then stripping it off again.
     CYGWIN_ROOT_PATH=`$CYGPATH -u "$cygwin_winpath_root " | $CUT -f 1 -d " "`
     AC_MSG_RESULT([$CYGWIN_ROOT_PATH])
--- a/common/autoconf/boot-jdk.m4	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/boot-jdk.m4	Sat Aug 04 12:52:41 2018 +0100
@@ -334,7 +334,7 @@
   # Maximum amount of heap memory.
   # Maximum stack size.
   if test "x$BOOT_JDK_BITS" = x32; then
-    JVM_MAX_HEAP=1100M
+    JVM_MAX_HEAP=768M
     STACK_SIZE=768
   else
     # Running Javac on a JVM on a 64-bit machine, takes more space since 64-bit
--- a/common/autoconf/build-performance.m4	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/build-performance.m4	Sat Aug 04 12:52:41 2018 +0100
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -160,20 +160,28 @@
 AC_DEFUN([BPERF_SETUP_CCACHE],
 [
   AC_ARG_ENABLE([ccache],
-      [AS_HELP_STRING([--disable-ccache],
-      [disable using ccache to speed up recompilations @<:@enabled@:>@])],
-      [ENABLE_CCACHE=${enable_ccache}], [ENABLE_CCACHE=yes])
-  if test "x$ENABLE_CCACHE" = xyes; then
+      [AS_HELP_STRING([--enable-ccache],
+      [enable using ccache to speed up recompilations @<:@disabled@:>@])])
+
+  CCACHE=
+  AC_MSG_CHECKING([is ccache enabled])
+  ENABLE_CCACHE=$enable_ccache
+  if test "x$enable_ccache" = xyes; then
+    AC_MSG_RESULT([yes])
     OLD_PATH="$PATH"
-    if test "x$TOOLS_DIR" != x; then
-      PATH=$TOOLS_DIR:$PATH
+    if test "x$TOOLCHAIN_PATH" != x; then
+      PATH=$TOOLCHAIN_PATH:$PATH
     fi
-    AC_PATH_PROG(CCACHE, ccache)
+    BASIC_REQUIRE_PROGS(CCACHE, ccache)
+    CCACHE_STATUS="enabled"
     PATH="$OLD_PATH"
+  elif test "x$enable_ccache" = xno; then
+    AC_MSG_RESULT([no, explicitly disabled])
+  elif test "x$enable_ccache" = x; then
+    AC_MSG_RESULT([no])
   else
-    AC_MSG_CHECKING([for ccache])
-    AC_MSG_RESULT([explicitly disabled])
-    CCACHE=
+    AC_MSG_RESULT([unknown])
+    AC_MSG_ERROR([--enable-ccache does not accept any parameters])
   fi
   AC_SUBST(CCACHE)
 
@@ -185,8 +193,11 @@
     # When using a non home ccache directory, assume the use is to share ccache files
     # with other users. Thus change the umask.
     SET_CCACHE_DIR="CCACHE_DIR=$with_ccache_dir CCACHE_UMASK=002"
+    if test "x$CCACHE" = x; then
+      AC_MSG_WARN([--with-ccache-dir has no meaning when ccache is not enabled])
+    fi
   fi
-  CCACHE_FOUND=""
+
   if test "x$CCACHE" != x; then
     BPERF_SETUP_CCACHE_USAGE
   fi
@@ -195,7 +206,6 @@
 AC_DEFUN([BPERF_SETUP_CCACHE_USAGE],
 [
   if test "x$CCACHE" != x; then
-    CCACHE_FOUND="true"
     # Only use ccache if it is 3.1.4 or later, which supports
     # precompiled headers.
     AC_MSG_CHECKING([if ccache supports precompiled headers])
@@ -203,6 +213,7 @@
     if test "x$HAS_GOOD_CCACHE" = x; then
       AC_MSG_RESULT([no, disabling ccache])
       CCACHE=
+      CCACHE_STATUS="disabled"
     else
       AC_MSG_RESULT([yes])
       AC_MSG_CHECKING([if C-compiler supports ccache precompiled headers])
@@ -215,6 +226,7 @@
       else
         AC_MSG_RESULT([no, disabling ccaching of precompiled headers])
         CCACHE=
+        CCACHE_STATUS="disabled"
       fi
     fi
   fi
@@ -249,7 +261,7 @@
 
   if test "x$ENABLE_PRECOMPH" = xyes; then
     # Check that the compiler actually supports precomp headers.
-    if test "x$GCC" = xyes; then
+    if test "x$TOOLCHAIN_TYPE" = xgcc; then
       AC_MSG_CHECKING([that precompiled headers work])
       echo "int alfa();" > conftest.h
       $CXX -x c++-header conftest.h -o conftest.hpp.gch 2>&AS_MESSAGE_LOG_FD >&AS_MESSAGE_LOG_FD
--- a/common/autoconf/compare.sh.in	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/compare.sh.in	Sat Aug 04 12:52:41 2018 +0100
@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2014, 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
@@ -64,7 +64,7 @@
 UNPACK200="@FIXPATH@ @BOOT_JDK@/bin/unpack200"
 UNZIP="@UNZIP@"
 
-SRC_ROOT="@SRC_ROOT@"
+SRC_ROOT="@TOPDIR@"
 
 if [ "$OPENJDK_TARGET_OS" = "windows" ]; then
   PATH="@VS_PATH@"
--- a/common/autoconf/configure	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/configure	Sat Aug 04 12:52:41 2018 +0100
@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2018, 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
@@ -22,23 +22,30 @@
 # questions.
 #
 
-if test "x$BASH_VERSION" = x; then
-  echo This script needs bash to run.
-  echo It is recommended to use the configure script in the source tree root instead.
-  exit 1
+if test "x$1" != xCHECKME; then
+  echo "WARNING: Calling the wrapper script directly is deprecated and unsupported."
+  echo "Not all features of configure will be available."
+  echo "Use the 'configure' script in the top-level directory instead."
+  TOPDIR=$(cd $(dirname $0)/../.. > /dev/null && pwd)
+else
+  # Now the next argument is the absolute top-level directory path.
+  # The TOPDIR variable is passed on to configure.ac.
+  TOPDIR="$2"
+  # Remove these two arguments to get to the user supplied arguments
+  shift
+  shift
 fi
 
 # Force autoconf to use bash. This also means we must disable autoconf re-exec.
 export CONFIG_SHELL=$BASH
 export _as_can_reexec=no
 
-CONFIGURE_COMMAND_LINE="$@"
-conf_script_dir=`dirname $0`
+conf_script_dir="$TOPDIR/common/autoconf"
 
 if [ "$CUSTOM_CONFIG_DIR" = "" ]; then
-  conf_custom_script_dir="$conf_script_dir/../../jdk/make/closed/autoconf"
+  conf_custom_script_dir="$TOPDIR/jdk/make/closed/autoconf"
 else
-  conf_custom_script_dir=$CUSTOM_CONFIG_DIR
+  conf_custom_script_dir="$CUSTOM_CONFIG_DIR"
 fi
 
 ###
@@ -114,28 +121,79 @@
 if test "x$conf_debug_configure" = xtrue; then
   conf_debug_configure=recursive
 fi
+
 ###
 ### Process command-line arguments
 ###
+
+# Returns a shell-escaped version of the argument given.
+function shell_quote() {
+  if [[ -n "$1" ]]; then
+    # Uses only shell-safe characters?  No quoting needed.
+    # '=' is a zsh meta-character, but only in word-initial position.
+    if [[ "$1" =~ ^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.:,%/+=_-]+$ && ! "$1" =~ ^= ]]; then
+      quoted="$1"
+    else
+      if [[ "$1" =~ [\'!] ]]; then
+        # csh does history expansion within single quotes, but not
+        # when backslash-escaped!
+        local quoted_quote="'\\''" quoted_exclam="'\\!'"
+        word="${1//\'/${quoted_quote}}"
+        word="${1//\!/${quoted_exclam}}"
+      fi
+      quoted="'$1'"
+    fi
+    echo "$quoted"
+  fi
+}
+
 conf_processed_arguments=()
+conf_quoted_arguments=()
 conf_openjdk_target=
 
 for conf_option
 do
+
+  # Process (and remove) our own extensions that will not be passed to autoconf
   case $conf_option in
     --openjdk-target=*)
       conf_openjdk_target=`expr "X$conf_option" : '[^=]*=\(.*\)'`
-      continue ;;
+      ;;
     --debug-configure)
       if test "x$conf_debug_configure" != xrecursive; then
         conf_debug_configure=true
         export conf_debug_configure
       fi
-      continue ;;
+      ;;
     *)
-      conf_processed_arguments=("${conf_processed_arguments[@]}" "$conf_option") ;;
+      conf_processed_arguments=("${conf_processed_arguments[@]}" "$conf_option")
+      ;;
   esac
 
+  # Store all variables overridden on the command line
+  case $conf_option in
+    [^-]*=*)
+      # Add name of variable to CONFIGURE_OVERRIDDEN_VARIABLES list inside !...!.
+      conf_env_var=`expr "x$conf_option" : 'x\([^=]*\)='`
+      CONFIGURE_OVERRIDDEN_VARIABLES="$CONFIGURE_OVERRIDDEN_VARIABLES!$conf_env_var!"
+      ;;
+  esac
+
+  # Save the arguments, intelligently quoted for CONFIGURE_COMMAND_LINE.
+  case $conf_option in
+    *=*)
+      conf_option_name=`expr "x$conf_option" : 'x\([^=]*\)='`
+      conf_option_name=$(shell_quote "$conf_option_name")
+      conf_option_value=`expr "x$conf_option" : 'x[^=]*=\(.*\)'`
+      conf_option_value=$(shell_quote "$conf_option_value")
+      conf_quoted_arguments=("${conf_quoted_arguments[@]}" "$conf_option_name=$conf_option_value")
+      ;;
+    *)
+      conf_quoted_arguments=("${conf_quoted_arguments[@]}" "$(shell_quote "$conf_option")")
+      ;;
+  esac
+
+  # Check for certain autoconf options that require extra action
   case $conf_option in
     -build | --build | --buil | --bui | --bu |-build=* | --build=* | --buil=* | --bui=* | --bu=*)
       conf_legacy_crosscompile="$conf_legacy_crosscompile $conf_option" ;;
@@ -148,6 +206,9 @@
   esac
 done
 
+# Save the quoted command line
+CONFIGURE_COMMAND_LINE="${conf_quoted_arguments[@]}"
+
 if test "x$conf_legacy_crosscompile" != "x"; then
   if test "x$conf_openjdk_target" != "x"; then
     echo "Error: Specifying --openjdk-target together with autoconf"
@@ -177,10 +238,10 @@
 ###
 if test -e $conf_custom_script_dir/generated-configure.sh; then
   # Custom source configure available; run that instead
-  echo Running custom generated-configure.sh
+  echo "Running custom generated-configure.sh"
   conf_script_to_run=$conf_custom_script_dir/generated-configure.sh
 else
-  echo Running generated-configure.sh
+  echo "Running generated-configure.sh"
   conf_script_to_run=$conf_script_dir/generated-configure.sh
 fi
 
@@ -214,8 +275,18 @@
   --debug-configure       Run the configure script with additional debug
                           logging enabled.
 
+EOT
+
+    # Print list of toolchains. This must be done by the autoconf script.
+    ( CONFIGURE_PRINT_TOOLCHAIN_LIST=true . $conf_script_to_run PRINTF=printf )
+
+    cat <<EOT
+
 Please be aware that, when cross-compiling, the OpenJDK configure script will
 generally use 'target' where autoconf traditionally uses 'host'.
+
+Also note that variables must be passed on the command line. Variables in the
+environment will generally be ignored, unlike traditional autoconf scripts.
 EOT
   fi
 else
--- a/common/autoconf/configure.ac	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/configure.ac	Sat Aug 04 12:52:41 2018 +0100
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2018, 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
@@ -33,7 +33,7 @@
 AC_PREREQ([2.69])
 AC_INIT(OpenJDK, jdk8, build-dev@openjdk.java.net,,http://openjdk.java.net)
 
-AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_AUX_DIR([$TOPDIR/common/autoconf/build-aux])
 m4_include([build-aux/pkg.m4])
 
 # Include these first...
@@ -43,6 +43,7 @@
 # ... then the rest
 m4_include([boot-jdk.m4])
 m4_include([build-performance.m4])
+m4_include([flags.m4])
 m4_include([help.m4])
 m4_include([jdk-options.m4])
 m4_include([libraries.m4])
@@ -72,7 +73,11 @@
 #
 ###############################################################################
 
-# Basic initialization that must happen first of all
+# If we are requested to print additional help, do that and then exit.
+# This must be the very first call.
+HELP_PRINT_ADDITIONAL_HELP_AND_EXIT
+
+# Basic initialization that must happen first of all in the normal process.
 BASIC_INIT
 BASIC_SETUP_FUNDAMENTAL_TOOLS
 
@@ -96,6 +101,9 @@
 # With basic setup done, call the custom early hook.
 CUSTOM_EARLY_HOOK
 
+# Check if we have devkits, extra paths or sysroot set.
+BASIC_SETUP_DEVKIT
+
 # To properly create a configuration name, we need to have the OpenJDK target
 # and options (variants and debug level) parsed.
 BASIC_SETUP_OUTPUT_DIR
@@ -149,26 +157,41 @@
 
 ###############################################################################
 #
-# Setup the toolchain (compilers etc), i.e. the tools that need to be
-# cross-compilation aware.
+# Setup the toolchain (compilers etc), i.e. tools used to compile and process
+# native code.
 #
 ###############################################################################
 
-TOOLCHAIN_SETUP_SYSROOT_AND_OUT_OPTIONS
-# Locate the actual tools
-TOOLCHAIN_SETUP_PATHS
+# First determine the toolchain type (compiler family)
+TOOLCHAIN_DETERMINE_TOOLCHAIN_TYPE
 
-# FIXME: Currently we must test this after paths but before flags. Fix!
+# Then detect the actual binaries needed
+TOOLCHAIN_PRE_DETECTION
+TOOLCHAIN_DETECT_TOOLCHAIN_CORE
+TOOLCHAIN_DETECT_TOOLCHAIN_EXTRA
+TOOLCHAIN_POST_DETECTION
 
-# And we can test some aspects on the target using configure macros.
+# Finally do some processing after the detection phase
+TOOLCHAIN_SETUP_BUILD_COMPILERS
+TOOLCHAIN_SETUP_LEGACY
+TOOLCHAIN_MISC_CHECKS
+
+# Setup the JTReg Regression Test Harness.
+TOOLCHAIN_SETUP_JTREG
+
+FLAGS_SETUP_INIT_FLAGS
+
+# FIXME: Currently we must test this after toolchain but before flags. Fix!
+
+# Now we can test some aspects on the target using configure macros.
 PLATFORM_SETUP_OPENJDK_TARGET_BITS
 PLATFORM_SETUP_OPENJDK_TARGET_ENDIANNESS
 
 # Configure flags for the tools
-TOOLCHAIN_SETUP_COMPILER_FLAGS_FOR_LIBS
-TOOLCHAIN_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION
-TOOLCHAIN_SETUP_COMPILER_FLAGS_FOR_JDK
-TOOLCHAIN_SETUP_COMPILER_FLAGS_MISC
+FLAGS_SETUP_COMPILER_FLAGS_FOR_LIBS
+FLAGS_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION
+FLAGS_SETUP_COMPILER_FLAGS_FOR_JDK
+FLAGS_SETUP_COMPILER_FLAGS_MISC
 
 # Setup debug symbols (need objcopy from the toolchain for that)
 JDKOPT_SETUP_DEBUG_SYMBOLS
@@ -189,7 +212,7 @@
 LIB_SETUP_ALSA
 LIB_SETUP_MISC_LIBS
 LIB_SETUP_STATIC_LINK_LIBSTDCPP
-
+LIB_SETUP_ON_WINDOWS
 
 ###############################################################################
 #
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/autoconf/flags.m4	Sat Aug 04 12:52:41 2018 +0100
@@ -0,0 +1,808 @@
+#
+# Copyright (c) 2011, 2018, 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([FLAGS_SETUP_INIT_FLAGS],
+[
+  # Option used to tell the compiler whether to create 32- or 64-bit executables
+  if test "x$TOOLCHAIN_TYPE" = xxlc; then
+    COMPILER_TARGET_BITS_FLAG="-q"
+  else
+    COMPILER_TARGET_BITS_FLAG="-m"
+  fi
+  AC_SUBST(COMPILER_TARGET_BITS_FLAG)
+
+  # FIXME: figure out if we should select AR flags depending on OS or toolchain.
+  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    ARFLAGS="-r"
+  elif test "x$OPENJDK_TARGET_OS" = xaix; then
+    ARFLAGS="-X64"
+  elif test "x$OPENJDK_TARGET_OS" = xwindows; then
+    # lib.exe is used as AR to create static libraries.
+    ARFLAGS="-nologo -NODEFAULTLIB:MSVCRT"
+  else
+    ARFLAGS=""
+  fi
+  AC_SUBST(ARFLAGS)
+
+  ## Setup strip.
+  # FIXME: should this really be per platform, or should it be per toolchain type?
+  # strip is not provided by clang or solstudio; so guessing platform makes most sense.
+  # FIXME: we should really only export STRIPFLAGS from here, not POST_STRIP_CMD.
+  if test "x$OPENJDK_TARGET_OS" = xlinux; then
+    STRIPFLAGS="-g"
+  elif test "x$OPENJDK_TARGET_OS" = xsolaris; then
+    STRIPFLAGS="-x"
+  elif test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    STRIPFLAGS="-S"
+  elif test "x$OPENJDK_TARGET_OS" = xaix; then
+    STRIPFLAGS="-X32_64"
+  fi
+
+  if test "x$OPENJDK_TARGET_OS" != xwindows; then
+    POST_STRIP_CMD="$STRIP $STRIPFLAGS"
+  fi
+  AC_SUBST(POST_STRIP_CMD)
+
+  if test "x$OPENJDK_TARGET_OS" = xsolaris; then
+    # FIXME: break out into MCSFLAGS
+    POST_MCS_CMD="$MCS -d -a \"JDK $FULL_VERSION\""
+  fi
+  AC_SUBST(POST_MCS_CMD)
+
+  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+    CC_OUT_OPTION=-Fo
+    EXE_OUT_OPTION=-out:
+    LD_OUT_OPTION=-out:
+    AR_OUT_OPTION=-out:
+  else
+    # The option used to specify the target .o,.a or .so file.
+    # When compiling, how to specify the to be created object file.
+    CC_OUT_OPTION='-o$(SPACE)'
+    # When linking, how to specify the to be created executable.
+    EXE_OUT_OPTION='-o$(SPACE)'
+    # When linking, how to specify the to be created dynamically linkable library.
+    LD_OUT_OPTION='-o$(SPACE)'
+    # When archiving, how to specify the to be create static archive for object files.
+    AR_OUT_OPTION='rcs$(SPACE)'
+  fi
+  AC_SUBST(CC_OUT_OPTION)
+  AC_SUBST(EXE_OUT_OPTION)
+  AC_SUBST(LD_OUT_OPTION)
+  AC_SUBST(AR_OUT_OPTION)
+
+  # On Windows, we need to set RC flags.
+  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+    RC_FLAGS="-nologo -l 0x409 -r"
+    if test "x$VARIANT" = xOPT; then
+      RC_FLAGS="$RC_FLAGS -d NDEBUG"
+    fi
+
+    # The version variables used to create RC_FLAGS may be overridden
+    # in a custom configure script, or possibly the command line.
+    # Let those variables be expanded at make time in spec.gmk.
+    # The \$ are escaped to the shell, and the $(...) variables
+    # are evaluated by make.
+    RC_FLAGS="$RC_FLAGS \
+        -d \"JDK_BUILD_ID=\$(FULL_VERSION)\" \
+        -d \"JDK_COMPANY=\$(COMPANY_NAME)\" \
+        -d \"JDK_COMPONENT=\$(PRODUCT_NAME) \$(JDK_RC_PLATFORM_NAME) binary\" \
+        -d \"JDK_VER=\$(JDK_MINOR_VERSION).\$(JDK_MICRO_VERSION).\$(if \$(JDK_UPDATE_VERSION),\$(JDK_UPDATE_VERSION),0).\$(COOKED_BUILD_NUMBER)\" \
+        -d \"JDK_COPYRIGHT=Copyright \xA9 $COPYRIGHT_YEAR\" \
+        -d \"JDK_NAME=\$(PRODUCT_NAME) \$(JDK_RC_PLATFORM_NAME) \$(JDK_MINOR_VERSION) \$(JDK_UPDATE_META_TAG)\" \
+        -d \"JDK_FVER=\$(JDK_MINOR_VERSION),\$(JDK_MICRO_VERSION),\$(if \$(JDK_UPDATE_VERSION),\$(JDK_UPDATE_VERSION),0),\$(COOKED_BUILD_NUMBER)\""
+  fi
+  AC_SUBST(RC_FLAGS)
+
+  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+    # FIXME: likely bug, should be CCXXFLAGS_JDK? or one for C or CXX.
+    CCXXFLAGS="$CCXXFLAGS -nologo"
+  fi
+
+  if test "x$SYSROOT" != "x"; then
+    if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+      if test "x$OPENJDK_TARGET_OS" = xsolaris; then
+        # Solaris Studio does not have a concept of sysroot. Instead we must
+        # make sure the default include and lib dirs are appended to each 
+        # compile and link command line.
+        SYSROOT_CFLAGS="-I$SYSROOT/usr/include"
+        SYSROOT_LDFLAGS="-L$SYSROOT/usr/lib$OPENJDK_TARGET_CPU_ISADIR \
+            -L$SYSROOT/lib$OPENJDK_TARGET_CPU_ISADIR \
+            -L$SYSROOT/usr/ccs/lib$OPENJDK_TARGET_CPU_ISADIR"
+      fi
+    elif test "x$TOOLCHAIN_TYPE" = xgcc; then
+      SYSROOT_CFLAGS="--sysroot=\"$SYSROOT\""
+      SYSROOT_LDFLAGS="--sysroot=\"$SYSROOT\""
+    elif test "x$TOOLCHAIN_TYPE" = xclang; then
+      SYSROOT_CFLAGS="-isysroot \"$SYSROOT\""
+      SYSROOT_LDFLAGS="-isysroot \"$SYSROOT\""
+    fi
+    # Propagate the sysroot args to hotspot
+    LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS $SYSROOT_CFLAGS"
+    LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS $SYSROOT_CFLAGS"
+    LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS $SYSROOT_LDFLAGS"
+  fi
+  AC_SUBST(SYSROOT_CFLAGS)
+  AC_SUBST(SYSROOT_LDFLAGS)
+])
+
+AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_LIBS],
+[
+  ###############################################################################
+  #
+  # How to compile shared libraries.
+  #
+
+  if test "x$TOOLCHAIN_TYPE" = xgcc; then
+    PICFLAG="-fPIC"
+    C_FLAG_REORDER=''
+    CXX_FLAG_REORDER=''
+
+    if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+      # Linking is different on MacOSX
+      SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
+      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker @loader_path/.'
+      SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
+      SET_SHARED_LIBRARY_NAME='-Xlinker -install_name -Xlinker @rpath/[$]1'
+      SET_SHARED_LIBRARY_MAPFILE=''
+    else
+      # Default works for linux, might work on other platforms as well.
+      SHARED_LIBRARY_FLAGS='-shared'
+      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$ORIGIN[$]1'
+      SET_SHARED_LIBRARY_ORIGIN="-Xlinker -z -Xlinker origin $SET_EXECUTABLE_ORIGIN"
+      SET_SHARED_LIBRARY_NAME='-Xlinker -soname=[$]1'
+      SET_SHARED_LIBRARY_MAPFILE='-Xlinker -version-script=[$]1'
+    fi
+  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+    PICFLAG="-KPIC"
+    C_FLAG_REORDER='-xF'
+    CXX_FLAG_REORDER='-xF'
+    SHARED_LIBRARY_FLAGS="-G"
+    SET_EXECUTABLE_ORIGIN='-R\$$$$ORIGIN[$]1'
+    SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
+    SET_SHARED_LIBRARY_NAME=''
+    SET_SHARED_LIBRARY_MAPFILE='-M[$]1'
+  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
+    PICFLAG="-qpic=large"
+    C_FLAG_REORDER=''
+    CXX_FLAG_REORDER=''
+    SHARED_LIBRARY_FLAGS="-qmkshrobj"
+    SET_EXECUTABLE_ORIGIN=""
+    SET_SHARED_LIBRARY_ORIGIN=''
+    SET_SHARED_LIBRARY_NAME=''
+    SET_SHARED_LIBRARY_MAPFILE=''
+  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+    PICFLAG=""
+    C_FLAG_REORDER=''
+    CXX_FLAG_REORDER=''
+    SHARED_LIBRARY_FLAGS="-LD"
+    SET_EXECUTABLE_ORIGIN=''
+    SET_SHARED_LIBRARY_ORIGIN=''
+    SET_SHARED_LIBRARY_NAME=''
+    SET_SHARED_LIBRARY_MAPFILE=''
+  fi
+
+  AC_SUBST(C_FLAG_REORDER)
+  AC_SUBST(CXX_FLAG_REORDER)
+  AC_SUBST(SHARED_LIBRARY_FLAGS)
+  AC_SUBST(SET_EXECUTABLE_ORIGIN)
+  AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)
+  AC_SUBST(SET_SHARED_LIBRARY_NAME)
+  AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)
+
+  if test "x$OPENJDK_TARGET_OS" = xsolaris; then
+    CFLAGS_JDK="${CFLAGS_JDK} -D__solaris__"
+    CXXFLAGS_JDK="${CXXFLAGS_JDK} -D__solaris__"
+    CFLAGS_JDKLIB_EXTRA='-xstrconst'
+  fi
+  # The (cross) compiler is now configured, we can now test capabilities
+  # of the target platform.
+])
+
+# Documentation on common flags used for solstudio in HIGHEST.
+#
+# WARNING: Use of OPTIMIZATION_LEVEL=HIGHEST in your Makefile needs to be
+#          done with care, there are some assumptions below that need to
+#          be understood about the use of pointers, and IEEE behavior.
+#
+# -fns: Use non-standard floating point mode (not IEEE 754)
+# -fsimple: Do some simplification of floating point arithmetic (not IEEE 754)
+# -fsingle: Use single precision floating point with 'float'
+# -xalias_level=basic: Assume memory references via basic pointer types do not alias
+#   (Source with excessing pointer casting and data access with mixed
+#    pointer types are not recommended)
+# -xbuiltin=%all: Use intrinsic or inline versions for math/std functions
+#   (If you expect perfect errno behavior, do not use this)
+# -xdepend: Loop data dependency optimizations (need -xO3 or higher)
+# -xrestrict: Pointer parameters to functions do not overlap
+#   (Similar to -xalias_level=basic usage, but less obvious sometimes.
+#    If you pass in multiple pointers to the same data, do not use this)
+# -xlibmil: Inline some library routines
+#   (If you expect perfect errno behavior, do not use this)
+# -xlibmopt: Use optimized math routines (CURRENTLY DISABLED)
+#   (If you expect perfect errno behavior, do not use this)
+#  Can cause undefined external on Solaris 8 X86 on __sincos, removing for now
+
+    # FIXME: this will never happen since sparc != sparcv9, ie 32 bit, which we don't build anymore.
+    # Bug?
+    #if test "x$OPENJDK_TARGET_CPU" = xsparc; then
+    #  CFLAGS_JDK="${CFLAGS_JDK} -xmemalign=4s"
+    #  CXXFLAGS_JDK="${CXXFLAGS_JDK} -xmemalign=4s"
+    #fi
+
+AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION],
+[
+
+  ###############################################################################
+  #
+  # Setup the opt flags for different compilers
+  # and different operating systems.
+  #
+
+  # FIXME: this was indirectly the old default, but just inherited.
+  # if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+  #   C_FLAG_DEPS="-MMD -MF"
+  # fi
+
+  # Generate make dependency files
+  if test "x$TOOLCHAIN_TYPE" = xgcc; then
+    C_FLAG_DEPS="-MMD -MF"
+  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+    C_FLAG_DEPS="-xMMD -xMF"
+  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
+    C_FLAG_DEPS="-qmakedep=gcc -MF"
+  fi
+  CXX_FLAG_DEPS="$C_FLAG_DEPS"
+  AC_SUBST(C_FLAG_DEPS)
+  AC_SUBST(CXX_FLAG_DEPS)
+
+  # Debug symbols
+  if test "x$TOOLCHAIN_TYPE" = xgcc; then
+    if test "x$OPENJDK_TARGET_CPU_BITS" = "x64" && test "x$DEBUG_LEVEL" = "xfastdebug"; then
+      CFLAGS_DEBUG_SYMBOLS="-g1"
+      CXXFLAGS_DEBUG_SYMBOLS="-g1"
+    else
+      CFLAGS_DEBUG_SYMBOLS="-g"
+      CXXFLAGS_DEBUG_SYMBOLS="-g"
+    fi
+  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+    CFLAGS_DEBUG_SYMBOLS="-g -xs"
+    CXXFLAGS_DEBUG_SYMBOLS="-g0 -xs"
+  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
+    CFLAGS_DEBUG_SYMBOLS="-g"
+    CXXFLAGS_DEBUG_SYMBOLS="-g"
+  fi
+  AC_SUBST(CFLAGS_DEBUG_SYMBOLS)
+  AC_SUBST(CXXFLAGS_DEBUG_SYMBOLS)
+
+  # Optimization levels
+  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+    CC_HIGHEST="$CC_HIGHEST -fns -fsimple -fsingle -xalias_level=basic -xbuiltin=%all -xdepend -xrestrict -xlibmil"
+
+    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86"; then
+      # FIXME: seems we always set -xregs=no%frameptr; put it elsewhere more global?
+      C_O_FLAG_HIGHEST="-xO4 -Wu,-O4~yz $CC_HIGHEST -xregs=no%frameptr"
+      C_O_FLAG_HI="-xO4 -Wu,-O4~yz -xregs=no%frameptr"
+      C_O_FLAG_NORM="-xO2 -Wu,-O2~yz -xregs=no%frameptr"
+      C_O_FLAG_NONE="-xregs=no%frameptr"
+      CXX_O_FLAG_HIGHEST="-xO4 -Qoption ube -O4~yz $CC_HIGHEST -xregs=no%frameptr"
+      CXX_O_FLAG_HI="-xO4 -Qoption ube -O4~yz -xregs=no%frameptr"
+      CXX_O_FLAG_NORM="-xO2 -Qoption ube -O2~yz -xregs=no%frameptr"
+      CXX_O_FLAG_NONE="-xregs=no%frameptr"
+      if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then
+        C_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST -xchip=pentium"
+        CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_HIGHEST -xchip=pentium"
+      fi
+    elif test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then
+      C_O_FLAG_HIGHEST="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0 $CC_HIGHEST -xprefetch=auto,explicit -xchip=ultra"
+      C_O_FLAG_HI="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0"
+      C_O_FLAG_NORM="-xO2 -Wc,-Qrm-s -Wc,-Qiselect-T0"
+      C_O_FLAG_NONE=""
+      CXX_O_FLAG_HIGHEST="-xO4 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0 $CC_HIGHEST -xprefetch=auto,explicit -xchip=ultra"
+      CXX_O_FLAG_HI="-xO4 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0"
+      CXX_O_FLAG_NORM="-xO2 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0"
+      CXX_O_FLAG_NONE=""
+    fi
+  else
+    # The remaining toolchains share opt flags between CC and CXX;
+    # setup for C and duplicate afterwards.
+    if test "x$TOOLCHAIN_TYPE" = xgcc; then
+      if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+        # On MacOSX we optimize for size, something
+        # we should do for all platforms?
+        C_O_FLAG_HIGHEST="-Os"
+        C_O_FLAG_HI="-Os"
+        C_O_FLAG_NORM="-Os"
+        C_O_FLAG_NONE=""
+      else
+        C_O_FLAG_HIGHEST="-O3"
+        C_O_FLAG_HI="-O3"
+        C_O_FLAG_NORM="-O2"
+        C_O_FLAG_NONE="-O0"
+      fi
+    elif test "x$TOOLCHAIN_TYPE" = xxlc; then
+      C_O_FLAG_HIGHEST="-O3"
+      C_O_FLAG_HI="-O3 -qstrict"
+      C_O_FLAG_NORM="-O2"
+      C_O_FLAG_NONE=""
+    elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+      C_O_FLAG_HIGHEST="-O2"
+      C_O_FLAG_HI="-O1"
+      C_O_FLAG_NORM="-O1"
+      C_O_FLAG_NONE="-Od"
+    fi
+    CXX_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST"
+    CXX_O_FLAG_HI="$C_O_FLAG_HI"
+    CXX_O_FLAG_NORM="$C_O_FLAG_NORM"
+    CXX_O_FLAG_NONE="$C_O_FLAG_NONE"
+  fi
+
+  AC_SUBST(C_O_FLAG_HIGHEST)
+  AC_SUBST(C_O_FLAG_HI)
+  AC_SUBST(C_O_FLAG_NORM)
+  AC_SUBST(C_O_FLAG_NONE)
+  AC_SUBST(CXX_O_FLAG_HIGHEST)
+  AC_SUBST(CXX_O_FLAG_HI)
+  AC_SUBST(CXX_O_FLAG_NORM)
+  AC_SUBST(CXX_O_FLAG_NONE)
+])
+
+AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_JDK],
+[
+  # Special extras...
+  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then
+      CFLAGS_JDKLIB_EXTRA="${CFLAGS_JDKLIB_EXTRA} -xregs=no%appl"
+      CXXFLAGS_JDKLIB_EXTRA="${CXXFLAGS_JDKLIB_EXTRA} -xregs=no%appl"
+    fi
+  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
+    LDFLAGS_JDK="${LDFLAGS_JDK} -q64 -brtl -bnolibpath -liconv -bexpall"
+    CFLAGS_JDK="${CFLAGS_JDK} -qchars=signed -q64 -qfullpath -qsaveopt"
+    CXXFLAGS_JDK="${CXXFLAGS_JDK} -qchars=signed -q64 -qfullpath -qsaveopt"
+  elif test "x$TOOLCHAIN_TYPE" = xgcc; then
+    $2CXXSTD_CXXFLAG="-std=gnu++98"
+    FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]$2CXXSTD_CXXFLAG -Werror],
+                                       [], [$2CXXSTD_CXXFLAG=""])
+    $2CXXFLAGS_JDK="${$2CXXFLAGS_JDK} ${$2CXXSTD_CXXFLAG}"
+    $2JVM_CFLAGS="${$2JVM_CFLAGS} ${$2CXXSTD_CXXFLAG}"
+    AC_SUBST($2CXXSTD_CXXFLAG)
+  fi
+
+  if test "x$CFLAGS" != "x${ADDED_CFLAGS}"; then
+    AC_MSG_WARN([Ignoring CFLAGS($CFLAGS) found in environment. Use --with-extra-cflags])
+  fi
+
+  if test "x$CXXFLAGS" != "x${ADDED_CXXFLAGS}"; then
+    AC_MSG_WARN([Ignoring CXXFLAGS($CXXFLAGS) found in environment. Use --with-extra-cxxflags])
+  fi
+
+  if test "x$LDFLAGS" != "x${ADDED_LDFLAGS}"; then
+    AC_MSG_WARN([Ignoring LDFLAGS($LDFLAGS) found in environment. Use --with-extra-ldflags])
+  fi
+
+  AC_ARG_WITH(extra-cflags, [AS_HELP_STRING([--with-extra-cflags],
+      [extra flags to be used when compiling jdk c-files])])
+
+  AC_ARG_WITH(extra-cxxflags, [AS_HELP_STRING([--with-extra-cxxflags],
+      [extra flags to be used when compiling jdk c++-files])])
+
+  AC_ARG_WITH(extra-ldflags, [AS_HELP_STRING([--with-extra-ldflags],
+      [extra flags to be used when linking jdk])])
+
+  CFLAGS_JDK="${CFLAGS_JDK} $with_extra_cflags"
+  CXXFLAGS_JDK="${CXXFLAGS_JDK} $with_extra_cxxflags"
+  LDFLAGS_JDK="${LDFLAGS_JDK} $with_extra_ldflags"
+
+  # Hotspot needs these set in their legacy form
+  LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS $with_extra_cflags"
+  LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS $with_extra_cxxflags"
+  LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS $with_extra_ldflags"
+
+  AC_SUBST(LEGACY_EXTRA_CFLAGS)
+  AC_SUBST(LEGACY_EXTRA_CXXFLAGS)
+  AC_SUBST(LEGACY_EXTRA_LDFLAGS)
+
+  ###############################################################################
+  #
+  # Now setup the CFLAGS and LDFLAGS for the JDK build.
+  # Later we will also have CFLAGS and LDFLAGS for the hotspot subrepo build.
+  #
+
+  # Setup compiler/platform specific flags to CFLAGS_JDK,
+  # CXXFLAGS_JDK and CCXXFLAGS_JDK (common to C and CXX?)
+  if test "x$TOOLCHAIN_TYPE" = xgcc; then
+    # these options are used for both C and C++ compiles
+    CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -Wall -Wno-parentheses -Wextra -Wno-unused -Wno-unused-parameter -Wformat=2 \
+        -pipe -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE"
+    case $OPENJDK_TARGET_CPU_ARCH in
+      arm )
+        # on arm we don't prevent gcc to omit frame pointer but do prevent strict aliasing
+        CFLAGS_JDK="${CFLAGS_JDK} -fno-strict-aliasing"
+        ;;
+      ppc )
+        # on ppc we don't prevent gcc to omit frame pointer nor strict-aliasing
+        ;;
+      * )
+        CCXXFLAGS_JDK="$CCXXFLAGS_JDK -fno-omit-frame-pointer"
+        CFLAGS_JDK="${CFLAGS_JDK} -fno-strict-aliasing"
+        ;;
+    esac
+    TOOLCHAIN_CHECK_COMPILER_VERSION(6, FLAGS_SETUP_GCC6_COMPILER_FLAGS)
+  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+    CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -DTRACING -DMACRO_MEMSYS_OPS -DBREAKPTS"
+    if test "x$OPENJDK_TARGET_CPU_ARCH" = xx86; then
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DcpuIntel -Di586 -D$OPENJDK_TARGET_CPU_LEGACY_LIB"
+      CFLAGS_JDK="$CFLAGS_JDK -erroff=E_BAD_PRAGMA_PACK_VALUE"
+    fi
+  
+    CFLAGS_JDK="$CFLAGS_JDK -xc99=%none -xCC -errshort=tags -Xa -v -mt -W0,-noglobal"
+    CXXFLAGS_JDK="$CXXFLAGS_JDK -errtags=yes +w -mt -features=no%except -DCC_NOEX -norunpath -xnolib"
+  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
+    CFLAGS_JDK="$CFLAGS_JDK -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"
+    CXXFLAGS_JDK="$CXXFLAGS_JDK -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"
+  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+    CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK \
+        -Zi -MD -Zc:wchar_t- -W3 -wd4800 \
+        -DWIN32_LEAN_AND_MEAN \
+        -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE \
+        -DWIN32 -DIAL"
+    if test "x$OPENJDK_TARGET_CPU" = xx86_64; then
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_AMD64_ -Damd64"
+    else
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_X86_ -Dx86"
+    fi
+    # If building with Visual Studio 2010, we can still use _STATIC_CPPLIB to
+    # avoid bundling msvcpNNN.dll. Doesn't work with newer versions of visual
+    # studio.
+    if test "x$TOOLCHAIN_VERSION" = "x2010"; then
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK \
+          -D_STATIC_CPPLIB -D_DISABLE_DEPRECATE_STATIC_CPPLIB"
+    fi
+  fi
+
+  ###############################################################################
+
+  # Adjust flags according to debug level.
+  case $DEBUG_LEVEL in
+    fastdebug )
+      CFLAGS_JDK="$CFLAGS_JDK $CFLAGS_DEBUG_SYMBOLS"
+      CXXFLAGS_JDK="$CXXFLAGS_JDK $CXXFLAGS_DEBUG_SYMBOLS"
+      C_O_FLAG_HI="$C_O_FLAG_NORM"
+      C_O_FLAG_NORM="$C_O_FLAG_NORM"
+      CXX_O_FLAG_HI="$CXX_O_FLAG_NORM"
+      CXX_O_FLAG_NORM="$CXX_O_FLAG_NORM"
+      JAVAC_FLAGS="$JAVAC_FLAGS -g"
+      ;;
+    slowdebug )
+      CFLAGS_JDK="$CFLAGS_JDK $CFLAGS_DEBUG_SYMBOLS"
+      CXXFLAGS_JDK="$CXXFLAGS_JDK $CXXFLAGS_DEBUG_SYMBOLS"
+      C_O_FLAG_HI="$C_O_FLAG_NONE"
+      C_O_FLAG_NORM="$C_O_FLAG_NONE"
+      CXX_O_FLAG_HI="$CXX_O_FLAG_NONE"
+      CXX_O_FLAG_NORM="$CXX_O_FLAG_NONE"
+      JAVAC_FLAGS="$JAVAC_FLAGS -g"
+      ;;
+  esac
+
+  # Setup LP64
+  CCXXFLAGS_JDK="$CCXXFLAGS_JDK $ADD_LP64"
+
+  # Set some common defines. These works for all compilers, but assume
+  # -D is universally accepted.
+
+  # Setup endianness
+  if test "x$OPENJDK_TARGET_CPU_ENDIAN" = xlittle; then
+    # The macro _LITTLE_ENDIAN needs to be defined the same to avoid the
+    #   Sun C compiler warning message: warning: macro redefined: _LITTLE_ENDIAN
+    #   (The Solaris X86 system defines this in file /usr/include/sys/isa_defs.h).
+    #   Note: -Dmacro         is the same as    #define macro 1
+    #         -Dmacro=        is the same as    #define macro
+    if test "x$OPENJDK_TARGET_OS" = xsolaris; then
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_LITTLE_ENDIAN="
+    else
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_LITTLE_ENDIAN"
+    fi
+  else
+    # Same goes for _BIG_ENDIAN. Do we really need to set *ENDIAN on Solaris if they
+    # are defined in the system?
+    if test "x$OPENJDK_TARGET_OS" = xsolaris; then
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_BIG_ENDIAN="
+    else
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_BIG_ENDIAN"
+    fi
+  fi
+  
+  # Setup target OS define. Use OS target name but in upper case.
+  OPENJDK_TARGET_OS_UPPERCASE=`$ECHO $OPENJDK_TARGET_OS | $TR 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D$OPENJDK_TARGET_OS_UPPERCASE"
+
+  # Setup target CPU
+  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DARCH='\"$OPENJDK_TARGET_CPU_LEGACY\"' -D$OPENJDK_TARGET_CPU_LEGACY"
+  
+  # Setup debug/release defines
+  if test "x$DEBUG_LEVEL" = xrelease; then
+    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DNDEBUG"
+    if test "x$OPENJDK_TARGET_OS" = xsolaris; then
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DTRIMMED"
+    fi
+  else
+    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DDEBUG"
+  fi
+
+  # Setup release name
+  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DRELEASE='\"\$(RELEASE)\"'"
+
+
+  # Set some additional per-OS defines.
+  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_ALLBSD_SOURCE -D_DARWIN_UNLIMITED_SELECT"
+  elif test "x$OPENJDK_TARGET_OS" = xaix; then
+    # FIXME: PPC64 should not be here.
+    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DPPC64"
+  elif test "x$OPENJDK_TARGET_OS" = xbsd; then
+    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_ALLBSD_SOURCE"
+  fi
+
+  # Additional macosx handling
+  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    if test "x$TOOLCHAIN_TYPE" = xgcc; then
+      # FIXME: This needs to be exported in spec.gmk due to closed legacy code.
+      # FIXME: clean this up, and/or move it elsewhere.
+
+      # Setting these parameters makes it an error to link to macosx APIs that are
+      # newer than the given OS version and makes the linked binaries compatible 
+      # even if built on a newer version of the OS.
+      # The expected format is X.Y.Z
+      MACOSX_VERSION_MIN=10.7.0
+      AC_SUBST(MACOSX_VERSION_MIN)
+    
+      # The macro takes the version with no dots, ex: 1070
+      # Let the flags variables get resolved in make for easier override on make
+      # command line.
+      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DMAC_OS_X_VERSION_MAX_ALLOWED=\$(subst .,,\$(MACOSX_VERSION_MIN)) -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"
+      LDFLAGS_JDK="$LDFLAGS_JDK -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"
+    fi
+  fi
+
+  # Setup some hard coded includes
+  CCXXFLAGS_JDK="$CCXXFLAGS_JDK \
+      -I${JDK_OUTPUTDIR}/include \
+      -I${JDK_OUTPUTDIR}/include/$OPENJDK_TARGET_OS \
+      -I${JDK_TOPDIR}/src/share/javavm/export \
+      -I${JDK_TOPDIR}/src/$OPENJDK_TARGET_OS_EXPORT_DIR/javavm/export \
+      -I${JDK_TOPDIR}/src/share/native/common \
+      -I${JDK_TOPDIR}/src/$OPENJDK_TARGET_OS_API_DIR/native/common"
+
+  # The shared libraries are compiled using the picflag.
+  CFLAGS_JDKLIB="$CCXXFLAGS_JDK $CFLAGS_JDK $PICFLAG $CFLAGS_JDKLIB_EXTRA"
+  CXXFLAGS_JDKLIB="$CCXXFLAGS_JDK $CXXFLAGS_JDK $PICFLAG $CXXFLAGS_JDKLIB_EXTRA "
+
+  # Executable flags
+  CFLAGS_JDKEXE="$CCXXFLAGS_JDK $CFLAGS_JDK"
+  CXXFLAGS_JDKEXE="$CCXXFLAGS_JDK $CXXFLAGS_JDK"
+
+  AC_SUBST(CFLAGS_JDKLIB)
+  AC_SUBST(CFLAGS_JDKEXE)
+  AC_SUBST(CXXFLAGS_JDKLIB)
+  AC_SUBST(CXXFLAGS_JDKEXE)
+
+  # Setup LDFLAGS et al.
+  #
+  # Now this is odd. The JDK native libraries have to link against libjvm.so
+  # On 32-bit machines there is normally two distinct libjvm.so:s, client and server.
+  # Which should we link to? Are we lucky enough that the binary api to the libjvm.so library
+  # is identical for client and server? Yes. Which is picked at runtime (client or server)?
+  # Neither, since the chosen libjvm.so has already been loaded by the launcher, all the following
+  # libraries will link to whatever is in memory. Yuck.
+  #
+  # Thus we offer the compiler to find libjvm.so first in server then in client. It works. Ugh.
+  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+    LDFLAGS_JDK="$LDFLAGS_JDK -nologo -opt:ref -incremental:no"
+    if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then
+      LDFLAGS_JDK="$LDFLAGS_JDK -safeseh"
+    fi
+    # TODO: make -debug optional "--disable-full-debug-symbols"
+    LDFLAGS_JDK="$LDFLAGS_JDK -debug"
+    LDFLAGS_JDKLIB="${LDFLAGS_JDK} -dll -libpath:${JDK_OUTPUTDIR}/lib"
+    LDFLAGS_JDKLIB_SUFFIX=""
+    if test "x$OPENJDK_TARGET_CPU_BITS" = "x64"; then
+      LDFLAGS_STACK_SIZE=1048576
+    else
+      LDFLAGS_STACK_SIZE=327680
+    fi
+    LDFLAGS_JDKEXE="${LDFLAGS_JDK} /STACK:$LDFLAGS_STACK_SIZE"
+  else
+    if test "x$TOOLCHAIN_TYPE" = xgcc; then
+      # If this is a --hash-style=gnu system, use --hash-style=both, why?
+      # We have previously set HAS_GNU_HASH if this is the case
+      if test -n "$HAS_GNU_HASH"; then
+        LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker --hash-style=both "
+      fi
+      if test "x$OPENJDK_TARGET_OS" = xlinux; then
+        # And since we now know that the linker is gnu, then add:
+        #   -z defs, to forbid undefined symbols in object files
+        #   -z noexecstack, to mark stack regions as non-executable
+        LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker -z -Xlinker defs -Xlinker -z -Xlinker noexecstack"
+        if test "x$DEBUG_LEVEL" = "xrelease"; then
+          # When building release libraries, tell the linker optimize them.
+          # Should this be supplied to the OSS linker as well?
+          LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker -O1"
+        fi
+      fi
+    fi
+
+    if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+      LDFLAGS_JDK="$LDFLAGS_JDK -z defs -xildoff -ztext"
+      LDFLAGS_CXX_JDK="$LDFLAGS_CXX_JDK -norunpath -xnolib"
+    fi
+
+    LDFLAGS_JDKLIB="${LDFLAGS_JDK} $SHARED_LIBRARY_FLAGS \
+        -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}"
+
+    # On some platforms (mac) the linker warns about non existing -L dirs.
+    # Add server first if available. Linking aginst client does not always produce the same results.
+    # Only add client dir if client is being built. Add minimal (note not minimal1) if only building minimal1.
+    # Default to server for other variants.
+    if test "x$JVM_VARIANT_SERVER" = xtrue; then
+      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/server"
+    elif test "x$JVM_VARIANT_CLIENT" = xtrue; then
+      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/client"
+    elif test "x$JVM_VARIANT_MINIMAL1" = xtrue; then
+      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/minimal"
+    else
+      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/server"
+    fi
+
+    LDFLAGS_JDKLIB_SUFFIX="-ljava -ljvm"
+    if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
+      LDFLAGS_JDKLIB_SUFFIX="$LDFLAGS_JDKLIB_SUFFIX -lc"
+    fi
+
+    LDFLAGS_JDKEXE="${LDFLAGS_JDK}"
+    if test "x$OPENJDK_TARGET_OS" = xlinux; then
+      LDFLAGS_JDKEXE="$LDFLAGS_JDKEXE -Xlinker --allow-shlib-undefined"
+    fi
+  fi
+  AC_SUBST(LDFLAGS_JDKLIB)
+  AC_SUBST(LDFLAGS_JDKEXE)
+  AC_SUBST(LDFLAGS_JDKLIB_SUFFIX)
+  AC_SUBST(LDFLAGS_JDKEXE_SUFFIX)
+  AC_SUBST(LDFLAGS_CXX_JDK)
+])
+
+
+# FLAGS_C_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
+#                                  [RUN-IF-FALSE])
+# ------------------------------------------------------------
+# Check that the C compiler supports an argument
+AC_DEFUN([FLAGS_C_COMPILER_CHECK_ARGUMENTS],
+[
+  AC_MSG_CHECKING([if the C compiler supports "$1"])
+  supports=yes
+
+  saved_cflags="$CFLAGS"
+  CFLAGS="$CFLAGS $1"
+  AC_LANG_PUSH([C])
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [], 
+      [supports=no])
+  AC_LANG_POP([C])
+  CFLAGS="$saved_cflags"
+
+  AC_MSG_RESULT([$supports])
+  if test "x$supports" = "xyes" ; then
+    m4_ifval([$2], [$2], [:])
+  else
+    m4_ifval([$3], [$3], [:])
+  fi
+])
+
+# FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
+#                                    [RUN-IF-FALSE])
+# ------------------------------------------------------------
+# Check that the C++ compiler supports an argument
+AC_DEFUN([FLAGS_CXX_COMPILER_CHECK_ARGUMENTS],
+[
+  AC_MSG_CHECKING([if the C++ compiler supports "$1"])
+  supports=yes
+
+  saved_cxxflags="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAG $1"
+  AC_LANG_PUSH([C++])
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [], 
+      [supports=no])
+  AC_LANG_POP([C++])
+  CXXFLAGS="$saved_cxxflags"
+  
+  AC_MSG_RESULT([$supports])
+  if test "x$supports" = "xyes" ; then
+    m4_ifval([$2], [$2], [:])
+  else
+    m4_ifval([$3], [$3], [:])
+  fi
+])
+
+# FLAGS_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
+#                                [RUN-IF-FALSE])
+# ------------------------------------------------------------
+# Check that the C and C++ compilers support an argument
+AC_DEFUN([FLAGS_COMPILER_CHECK_ARGUMENTS],
+[
+  FLAGS_C_COMPILER_CHECK_ARGUMENTS([$1],
+                       [C_COMP_SUPPORTS="yes"],
+                       [C_COMP_SUPPORTS="no"])
+  FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([$1],
+                     [CXX_COMP_SUPPORTS="yes"],
+                     [CXX_COMP_SUPPORTS="no"])
+
+  AC_MSG_CHECKING([if both compilers support "$1"])
+  supports=no
+  if test "x$C_COMP_SUPPORTS" = "xyes" -a "x$CXX_COMP_SUPPORTS" = "xyes"; then supports=yes; fi
+  
+  AC_MSG_RESULT([$supports])
+  if test "x$supports" = "xyes" ; then
+    m4_ifval([$2], [$2], [:])
+  else
+    m4_ifval([$3], [$3], [:])
+  fi
+])
+
+AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_MISC],
+[
+  # Some Zero and Shark settings.
+  # ZERO_ARCHFLAG tells the compiler which mode to build for
+  case "${OPENJDK_TARGET_CPU}" in
+    s390)
+      ZERO_ARCHFLAG="${COMPILER_TARGET_BITS_FLAG}31"
+      ;;
+    *)
+      ZERO_ARCHFLAG="${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}"
+  esac
+  FLAGS_COMPILER_CHECK_ARGUMENTS([$ZERO_ARCHFLAG], [], [ZERO_ARCHFLAG=""])
+  AC_SUBST(ZERO_ARCHFLAG)
+
+  # Check that the compiler supports -mX (or -qX on AIX) flags
+  # Set COMPILER_SUPPORTS_TARGET_BITS_FLAG to 'true' if it does
+  FLAGS_COMPILER_CHECK_ARGUMENTS([${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}],
+      [COMPILER_SUPPORTS_TARGET_BITS_FLAG=true],
+      [COMPILER_SUPPORTS_TARGET_BITS_FLAG=false])
+  AC_SUBST(COMPILER_SUPPORTS_TARGET_BITS_FLAG)
+])
+
+AC_DEFUN_ONCE([FLAGS_SETUP_GCC6_COMPILER_FLAGS],
+[
+  # These flags are required for GCC 6 builds as undefined behaviour in OpenJDK code
+  # runs afoul of the more aggressive versions of these optimisations.
+  # Notably, value range propagation now assumes that the this pointer of C++
+  # member functions is non-null.
+  NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks"
+  FLAGS_COMPILER_CHECK_ARGUMENTS([$NO_DELETE_NULL_POINTER_CHECKS_CFLAG -Werror],
+                                     [], [NO_DELETE_NULL_POINTER_CHECKS_CFLAG=""])
+  AC_SUBST([NO_DELETE_NULL_POINTER_CHECKS_CFLAG])
+  NO_LIFETIME_DSE_CFLAG="-fno-lifetime-dse"
+  FLAGS_COMPILER_CHECK_ARGUMENTS([$NO_LIFETIME_DSE_CFLAG -Werror],
+                                     [], [NO_LIFETIME_DSE_CFLAG=""])
+  CFLAGS_JDK="${CFLAGS_JDK} ${NO_DELETE_NULL_POINTER_CHECKS_CFLAG} ${NO_LIFETIME_DSE_CFLAG}"
+  AC_SUBST([NO_LIFETIME_DSE_CFLAG])
+])
+
--- a/common/autoconf/generated-configure.sh	Fri Jul 27 11:46:51 2018 +0100
+++ b/common/autoconf/generated-configure.sh	Sat Aug 04 12:52:41 2018 +0100
@@ -1,3 +1,9 @@
+#!/bin/bash
+#
+# ##########################################################
+# ### THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT. ###
+# ##########################################################
+#
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69 for OpenJDK jdk8.
@@ -634,6 +640,8 @@
 ENABLE_INTREE_EC
 SALIB_NAME
 HOTSPOT_MAKE_ARGS
+MSVCP_DLL
+MSVCR_DLL
 LIBCXX
 LLVM_LIBS
 LLVM_LDFLAGS
@@ -654,18 +662,16 @@
 FREETYPE_LIBS
 FREETYPE_CFLAGS
 CUPS_CFLAGS
-OPENWIN_HOME
 X_EXTRA_LIBS
 X_LIBS
 X_PRE_LIBS
 X_CFLAGS
 XMKMF
 FIXPATH
-CXXFLAGS_DEBUG_SYMBOLS
-CFLAGS_DEBUG_SYMBOLS
 ZIP_DEBUGINFO_FILES
+DEBUG_BINARIES
+STRIP_POLICY
 ENABLE_DEBUG_SYMBOLS
-USING_BROKEN_SUSE_LD
 COMPILER_SUPPORTS_TARGET_BITS_FLAG
 ZERO_ARCHFLAG
 LDFLAGS_CXX_JDK
@@ -678,15 +684,12 @@
 CFLAGS_JDKEXE
 CFLAGS_JDKLIB
 MACOSX_VERSION_MIN
-PACKAGE_PATH
 NO_LIFETIME_DSE_CFLAG
 NO_DELETE_NULL_POINTER_CHECKS_CFLAG
-CXXSTD_CXXFLAG
 LEGACY_EXTRA_LDFLAGS
 LEGACY_EXTRA_CXXFLAGS
 LEGACY_EXTRA_CFLAGS
-CXX_FLAG_DEPS
-C_FLAG_DEPS
+CXXSTD_CXXFLAG
 CXX_O_FLAG_NONE
 CXX_O_FLAG_NORM
 CXX_O_FLAG_HI
@@ -695,67 +698,77 @@
 C_O_FLAG_NORM
 C_O_FLAG_HI
 C_O_FLAG_HIGHEST
+CXXFLAGS_DEBUG_SYMBOLS
+CFLAGS_DEBUG_SYMBOLS
+CXX_FLAG_DEPS
+C_FLAG_DEPS
+SET_SHARED_LIBRARY_MAPFILE
+SET_SHARED_LIBRARY_NAME
+SET_SHARED_LIBRARY_ORIGIN
+SET_EXECUTABLE_ORIGIN
+SHARED_LIBRARY_FLAGS
+CXX_FLAG_REORDER
+C_FLAG_REORDER
+SYSROOT_LDFLAGS
+SYSROOT_CFLAGS
+RC_FLAGS
+AR_OUT_OPTION
+LD_OUT_OPTION
+EXE_OUT_OPTION
+CC_OUT_OPTION
 POST_MCS_CMD
 POST_STRIP_CMD
-SET_EXECUTABLE_ORIGIN
-SET_SHARED_LIBRARY_ORIGIN
-CXX_FLAG_REORDER
-C_FLAG_REORDER
-SET_SHARED_LIBRARY_MAPFILE
-SET_SHARED_LIBRARY_NAME
-SHARED_LIBRARY_FLAGS
-EXE_SUFFIX
-STATIC_LIBRARY_SUFFIX
-SHARED_LIBRARY_SUFFIX
-LIBRARY_PREFIX
-STATIC_LIBRARY
-SHARED_LIBRARY
-OBJ_SUFFIX
-COMPILER_NAME
+ARFLAGS
+COMPILER_TARGET_BITS_FLAG
 JT_HOME
 JTREGEXE
+USING_BROKEN_SUSE_LD
+PACKAGE_PATH
+LDEXECXX
+LDEXE
+USE_CLANG
+HOTSPOT_LD
+HOTSPOT_CXX
+HOTSPOT_RC
+HOTSPOT_MT
+BUILD_LD
+BUILD_CXX
+BUILD_CC
 ac_ct_OBJDUMP
 OBJDUMP
 ac_ct_OBJCOPY
 OBJCOPY
+ac_ct_NM
 OTOOL
+ac_ct_STRIP
 MCS
-STRIP
 GNM
 NM
-AS
-CXXCPP
-CPP
-COMPILER_TYPE
-RC_FLAGS
+STRIP
+MSBUILD
 DUMPBIN
-WINAR
-HOTSPOT_RC
-HOTSPOT_MT
 RC
 MT
-WINLD
-HOTSPOT_LD
-HOTSPOT_CXX
-ARFLAGS
-AR
-LDEXECXX
-LDCXX
-LDEXE
-LD
+LIPO
 ac_ct_OBJC
 OBJCFLAGS
 OBJC
-CXX_VERSION
-CC_VERSION
+ac_ct_AR
+AR
+AS
+LDCXX
+LD
+CXXCPP
+CPP
+CXX_VERSION_NUMBER
+CC_VERSION_NUMBER
 ac_ct_CXX
 CXXFLAGS
 CXX
 ac_ct_PROPER_COMPILER_CXX
 PROPER_COMPILER_CXX
+TOOLCHAIN_PATH_CXX
 POTENTIAL_CXX
-TOOLS_DIR_CXX
-COMPILER_TARGET_BITS_FLAG
 OBJEXT
 EXEEXT
 ac_ct_CC
@@ -765,23 +778,23 @@
 CC
 ac_ct_PROPER_COMPILER_CC
 PROPER_COMPILER_CC
+TOOLCHAIN_PATH_CC
 POTENTIAL_CC
-TOOLS_DIR_CC
 SDKPATH
 XCODEBUILD
 SET_DEVELOPER_DIR
-BUILD_LD
-BUILD_CXX
-BUILD_CC
-MSVCR_DLL
-VS_PATH
 VS_LIB
 VS_INCLUDE
+VS_PATH
 CYGWIN_LINK
-AR_OUT_OPTION
-LD_OUT_OPTION
-EXE_OUT_OPTION
-CC_OUT_OPTION
+EXE_SUFFIX
+OBJ_SUFFIX
+STATIC_LIBRARY
+SHARED_LIBRARY
+STATIC_LIBRARY_SUFFIX
+SHARED_LIBRARY_SUFFIX
+LIBRARY_PREFIX
+TOOLCHAIN_TYPE
 BUILD_HOTSPOT
 HOTSPOT_DIST
 BUILD_OUTPUT
@@ -857,6 +870,7 @@
 OUTPUT_ROOT
 CONF_NAME
 SPEC
+DEVKIT_LIB_DIR
 BUILD_VARIANT_RELEASE
 DEBUG_CLASSFILES
 FASTDEBUG
@@ -878,9 +892,8 @@
 BUILD_LOG_WRAPPER
 BUILD_LOG_PREVIOUS
 BUILD_LOG
-SYS_ROOT
+TOPDIR
 PATH_SEP
-SRC_ROOT
 ZERO_ARCHDEF
 DEFINE_CROSS_COMPILE_ARCH
 LP64
@@ -899,12 +912,14 @@
 OPENJDK_TARGET_CPU_BITS
 OPENJDK_TARGET_CPU_ARCH
 OPENJDK_TARGET_CPU
+OPENJDK_TARGET_OS_ENV
 OPENJDK_TARGET_OS_API
 OPENJDK_TARGET_OS
 OPENJDK_BUILD_CPU_ENDIAN
 OPENJDK_BUILD_CPU_BITS
 OPENJDK_BUILD_CPU_ARCH
 OPENJDK_BUILD_CPU
+OPENJDK_BUILD_OS_ENV
 OPENJDK_BUILD_OS_API
 OPENJDK_BUILD_OS
 OPENJDK_BUILD_AUTOCONF_NAME
@@ -921,11 +936,11 @@
 build_vendor
 build_cpu
 build
+CPIO
 SETFILE
 DF
 READLINK
 CYGPATH
-NAWK
 SED
 FGREP
 EGREP
@@ -945,6 +960,7 @@
 SH
 RM
 PRINTF
+NAWK
 MV
 MKTEMP
 MKDIR
@@ -959,7 +975,6 @@
 DIFF
 DATE
 CUT
-CPIO
 CP
 COMM
 CMP
@@ -1013,16 +1028,19 @@
 enable_option_checking
 with_custom_make_dir
 with_target_bits
-with_sys_root
-with_tools_dir
-with_xcode_path
-with_devkit
 enable_openjdk_only
 with_jdk_variant
 with_jvm_interpreter
 with_jvm_variants
 enable_debug
 with_debug_level
+with_devkit
+with_sys_root
+with_sysroot
+with_tools_dir
+with_toolchain_path
+with_extra_path
+with_xcode_path
 with_conf_name
 with_builddeps_conf
 with_builddeps_server
@@ -1050,16 +1068,15 @@
 with_override_nashorn
 with_override_jdk
 with_import_hotspot
-with_msvcr_dll
-with_dxsdk
-with_dxsdk_lib
-with_dxsdk_include
+with_toolchain_type
+with_toolchain_version
 with_jtreg
 with_extra_cflags
 with_extra_cxxflags
 with_extra_ldflags
 enable_debug_symbols
 enable_zip_debug_info
+with_native_debug_symbols
 enable_macosx_runtime_support
 with_x
 with_cups
@@ -1067,6 +1084,7 @@
 with_freetype
 with_freetype_include
 with_freetype_lib
+with_freetype_src
 enable_freetype_bundling
 with_alsa
 with_alsa_include
@@ -1074,6 +1092,11 @@
 with_giflib
 with_zlib
 with_stdc__lib
+with_msvcr_dll
+with_msvcp_dll
+with_dxsdk
+with_dxsdk_lib
+with_dxsdk_include
 with_num_cores
 with_memory_size
 with_jobs
@@ -1086,6 +1109,62 @@
       ac_precious_vars='build_alias
 host_alias
 target_alias
+BASENAME
+BASH
+CAT
+CHMOD
+CMP
+COMM
+CP
+CUT
+DATE
+DIFF
+DIRNAME
+ECHO
+EXPR
+FILE
+FIND
+HEAD
+LN
+LS
+MKDIR
+MKTEMP
+MV
+NAWK
+PRINTF
+RM
+SH
+SORT
+TAIL
+TAR
+TEE
+TOUCH
+TR
+UNAME
+UNIQ
+WC
+WHICH
+XARGS
+AWK
+GREP
+EGREP
+FGREP
+SED
+CYGPATH
+READLINK
+DF
+SETFILE
+CPIO
+UNZIP
+ZIP
+LDD
+READELF
+HG
+STAT
+TIME
+DSYMUTIL
+XATTR
+CODESIGN
 PKG_CONFIG
 CC
 CFLAGS
@@ -1095,17 +1174,31 @@
 CXX
 CXXFLAGS
 CCC
+CPP
+CXXCPP
+AS
+AR
 OBJC
 OBJCFLAGS
-CPP
-CXXCPP
+LIPO
+STRIP
+NM
+GNM
+MCS
+OBJCOPY
+OBJDUMP
+BUILD_CC
+BUILD_CXX
+BUILD_LD
+JTREGEXE
 XMKMF
 FREETYPE_CFLAGS
 FREETYPE_LIBS
 ALSA_CFLAGS
 ALSA_LIBS
 LIBFFI_CFLAGS
-LIBFFI_LIBS'
+LIBFFI_LIBS
+CCACHE'
 
 
 # Initialize some variables set by options.
@@ -1749,8 +1842,8 @@
   --disable-precompiled-headers
                           disable using precompiled headers when compiling C++
                           [enabled]
-  --disable-ccache        disable using ccache to speed up recompilations
-                          [enabled]
+  --enable-ccache         enable using ccache to speed up recompilations
+                          [disabled]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -1758,14 +1851,6 @@
   --with-custom-make-dir  use this directory for custom build/make files
   --with-target-bits      build 32-bit or 64-bit binaries (for platforms that
                           support it), e.g. --with-target-bits=32 [guessed]
-  --with-sys-root         pass this sys-root to the compilers and tools (for
-                          cross-compiling)
-  --with-tools-dir        search this directory for compilers and tools (for
-                          cross-compiling)
-  --with-xcode-path       explicit path to Xcode 4 (generally for building on
-                          10.9 and later)
-  --with-devkit           use this directory as base for tools-dir and
-                          sys-root (for cross-compiling)
   --with-jdk-variant      JDK variant to build (normal) [normal]
   --with-jvm-interpreter  JVM interpreter to build (template, cpp) [template]
   --with-jvm-variants     JVM variants (separated by commas) to build (server,
@@ -1773,6 +1858,16 @@
                           [server]
   --with-debug-level      set the debug level (release, fastdebug, slowdebug)
                           [release]
+  --with-devkit           use this devkit for compilers, tools and resources
+  --with-sys-root         alias for --with-sysroot for backwards compatability
+  --with-sysroot          use this directory as sysroot)
+  --with-tools-dir        alias for --with-toolchain-path for backwards
+                          compatibility
+  --with-toolchain-path   prepend these directories when searching for
+                          toolchain binaries (compilers etc)
+  --with-extra-path       prepend these directories to the default path
+  --with-xcode-path       explicit path to Xcode 4 (generally for building on
+                          10.9 and later)
   --with-conf-name        use this as the name of the configuration [generated
                           from important configuration options]
   --with-builddeps-conf   use this configuration file for the builddeps
@@ -1818,18 +1913,19 @@
   --with-import-hotspot   import hotspot binaries from this jdk image or
                           hotspot build dist dir instead of building from
                           source
-  --with-msvcr-dll        copy this msvcr100.dll into the built JDK (Windows
-                          only) [probed]
-  --with-dxsdk            Deprecated. Option is kept for backwards
-                          compatibility and is ignored
-  --with-dxsdk-lib        Deprecated. Option is kept for backwards
-                          compatibility and is ignored
-  --with-dxsdk-include    Deprecated. Option is kept for backwards
-                          compatibility and is ignored
+  --with-toolchain-type   the toolchain type (or family) to use, use '--help'
+                          to show possible values [platform dependent]
+  --with-toolchain-version
+                          the version of the toolchain to look for, use
+                          '--help' to show possible values [platform
+                          dependent]
   --with-jtreg            Regression Test Harness [probed]
   --with-extra-cflags     extra flags to be used when compiling jdk c-files
   --with-extra-cxxflags   extra flags to be used when compiling jdk c++-files
   --with-extra-ldflags    extra flags to be used when linking jdk
+  --with-native-debug-symbols
+                          set the native debug symbol configuration (none,
+                          internal, external, zipped) [varying]
   --with-x                use the X Window System
   --with-cups             specify prefix directory for the cups package
                           (expecting the headers under PATH/include)
@@ -1839,6 +1935,9 @@
                           headers under PATH/include)
   --with-freetype-include specify directory for the freetype include files
   --with-freetype-lib     specify directory for the freetype library
+  --with-freetype-src     specify directory with freetype sources to
+                          automatically build the library (experimental,
+                          Windows-only)
   --with-alsa             specify prefix directory for the alsa package
                           (expecting the libraries under PATH/lib and the
                           headers under PATH/include)
@@ -1852,6 +1951,16 @@
                           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-dxsdk            Deprecated. Option is kept for backwards
+                          compatibility and is ignored
+  --with-dxsdk-lib        Deprecated. Option is kept for backwards
+                          compatibility and is ignored
+  --with-dxsdk-include    Deprecated. Option is kept for backwards
+                          compatibility and is ignored
   --with-num-cores        number of cores in the build system, e.g.
                           --with-num-cores=8 [probed]
   --with-memory-size      memory (in MB) available in the build system, e.g.
@@ -1864,6 +1973,62 @@
   --with-ccache-dir       where to store ccache files [~/.ccache]
 
 Some influential environment variables:
+  BASENAME    Override default value for BASENAME
+  BASH        Override default value for BASH
+  CAT         Override default value for CAT
+  CHMOD       Override default value for CHMOD
+  CMP         Override default value for CMP
+  COMM        Override default value for COMM
+  CP          Override default value for CP
+  CUT         Override default value for CUT
+  DATE        Override default value for DATE
+  DIFF        Override default value for DIFF
+  DIRNAME     Override default value for DIRNAME
+  ECHO        Override default value for ECHO
+  EXPR        Override default value for EXPR
+  FILE        Override default value for FILE
+  FIND        Override default value for FIND
+  HEAD        Override default value for HEAD
+  LN          Override default value for LN
+  LS          Override default value for LS
+  MKDIR       Override default value for MKDIR
+  MKTEMP      Override default value for MKTEMP
+  MV          Override default value for MV
+  NAWK        Override default value for NAWK
+  PRINTF      Override default value for PRINTF
+  RM          Override default value for RM
+  SH          Override default value for SH
+  SORT        Override default value for SORT
+  TAIL        Override default value for TAIL
+  TAR         Override default value for TAR
+  TEE         Override default value for TEE
+  TOUCH       Override default value for TOUCH
+  TR          Override default value for TR
+  UNAME       Override default value for UNAME
+  UNIQ        Override default value for UNIQ
+  WC          Override default value for WC
+  WHICH       Override default value for WHICH
+  XARGS       Override default value for XARGS
+  AWK         Override default value for AWK
+  GREP        Override default value for GREP
+  EGREP       Override default value for EGREP
+  FGREP       Override default value for FGREP
+  SED         Override default value for SED
+  CYGPATH     Override default value for CYGPATH
+  READLINK    Override default value for READLINK
+  DF          Override default value for DF
+  SETFILE     Override default value for SETFILE
+  CPIO        Override default value for CPIO
+  UNZIP       Override default value for UNZIP
+  ZIP         Override default value for ZIP
+  LDD         Override default value for LDD
+  READELF     Override default value for READELF
+  HG          Override default value for HG
+  STAT        Override default value for STAT
+  TIME        Override default value for TIME
+  DSYMUTIL    Override default value for DSYMUTIL
+  XATTR       Override default value for XATTR
+  CODESIGN    Override default value for CODESIGN
   PKG_CONFIG  path to pkg-config utility
   CC          C compiler command
   CFLAGS      C compiler flags
@@ -1874,10 +2039,23 @@
               you have headers in a nonstandard directory <include dir>
   CXX         C++ compiler command
   CXXFLAGS    C++ compiler flags
+  CPP         C preprocessor
+  CXXCPP      C++ preprocessor
+  AS          Override default value for AS
+  AR          Override default value for AR
   OBJC        Objective C compiler command
   OBJCFLAGS   Objective C compiler flags
-  CPP         C preprocessor
-  CXXCPP      C++ preprocessor
+  LIPO        Override default value for LIPO
+  STRIP       Override default value for STRIP
+  NM          Override default value for NM
+  GNM         Override default value for GNM
+  MCS         Override default value for MCS
+  OBJCOPY     Override default value for OBJCOPY
+  OBJDUMP     Override default value for OBJDUMP
+  BUILD_CC    Override default value for BUILD_CC
+  BUILD_CXX   Override default value for BUILD_CXX
+  BUILD_LD    Override default value for BUILD_LD
+  JTREGEXE    Override default value for JTREGEXE
   XMKMF       Path to xmkmf, Makefile generator for X Window System
   FREETYPE_CFLAGS
               C compiler flags for FREETYPE, overriding pkg-config
@@ -1888,6 +2066,7 @@
   LIBFFI_CFLAGS
               C compiler flags for LIBFFI, overriding pkg-config
   LIBFFI_LIBS linker flags for LIBFFI, overriding pkg-config
+  CCACHE      Override default value for CCACHE
 
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
@@ -2046,6 +2225,80 @@
 
 } # ac_fn_cxx_try_compile
 
+# ac_fn_c_try_cpp LINENO
+# ----------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_cpp
+
+# ac_fn_cxx_try_cpp LINENO
+# ------------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_cxx_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_cxx_preproc_warn_flag$ac_cxx_werror_flag" ||
+	 test ! -s conftest.err
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_cxx_try_cpp
+
 # ac_fn_objc_try_compile LINENO
 # -----------------------------
 # Try to compile conftest.$ac_ext, and return whether this succeeded.
@@ -2084,80 +2337,6 @@
 
 } # ac_fn_objc_try_compile
 
-# ac_fn_c_try_cpp LINENO
-# ----------------------
-# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
-ac_fn_c_try_cpp ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    grep -v '^ *+' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-    mv -f conftest.er1 conftest.err
-  fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } > conftest.i && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-    ac_retval=1
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_c_try_cpp
-
-# ac_fn_cxx_try_cpp LINENO
-# ------------------------
-# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
-ac_fn_cxx_try_cpp ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    grep -v '^ *+' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-    mv -f conftest.er1 conftest.err
-  fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } > conftest.i && {
-	 test -z "$ac_cxx_preproc_warn_flag$ac_cxx_werror_flag" ||
-	 test ! -s conftest.err
-       }; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-    ac_retval=1
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_cxx_try_cpp
-
 # ac_fn_cxx_check_header_mongrel LINENO HEADER VAR INCLUDES
 # ---------------------------------------------------------
 # Tests whether HEADER exists, giving a warning if it cannot be compiled using
@@ -3002,7 +3181,7 @@
 
 
 ac_aux_dir=
-for ac_dir in build-aux "$srcdir"/build-aux; do
+for ac_dir in $TOPDIR/common/autoconf/build-aux "$srcdir"/$TOPDIR/common/autoconf/build-aux; do
   if test -f "$ac_dir/install-sh"; then
     ac_aux_dir=$ac_dir
     ac_install_sh="$ac_aux_dir/install-sh -c"
@@ -3018,7 +3197,7 @@
   fi
 done
 if test -z "$ac_aux_dir"; then
-  as_fn_error $? "cannot find install-sh, install.sh, or shtool in build-aux \"$srcdir\"/build-aux" "$LINENO" 5
+  as_fn_error $? "cannot find install-sh, install.sh, or shtool in $TOPDIR/common/autoconf/build-aux \"$srcdir\"/$TOPDIR/common/autoconf/build-aux" "$LINENO" 5
 fi
 
 # These three variables are undocumented and unsupported,
@@ -3120,7 +3299,7 @@
 
 # Include these first...
 #
-# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2018, 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
@@ -3152,6 +3331,9 @@
 # Appends a string to a path variable, only adding the : when needed.
 
 
+# Prepends a string to a path variable, only adding the : when needed.
+
+
 # This will make sure the given variable points to a full and proper
 # path. This means:
 # 1) There will be no spaces in the path. On posix platforms,
@@ -3190,13 +3372,36 @@
 
 # Test that variable $1 denoting a program is not empty. If empty, exit with an error.
 # $1: variable to check
-# $2: executable name to print in warning (optional)
-
-
-# Does AC_PATH_PROG followed by BASIC_CHECK_NONEMPTY.
-# Arguments as AC_PATH_PROG:
+
+
+# Check that there are no unprocessed overridden variables left.
+# If so, they are an incorrect argument and we will exit with an error.
+
+
+# Setup a tool for the given variable. If correctly specified by the user,
+# use that value, otherwise search for the tool using the supplied code snippet.
 # $1: variable to set
-# $2: executable name to look for
+# $2: code snippet to call to look for the tool
+
+
+# Call BASIC_SETUP_TOOL with AC_PATH_PROGS to locate the tool
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+
+
+# Call BASIC_SETUP_TOOL with AC_CHECK_TOOLS to locate the tool
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+
+
+# Like BASIC_PATH_PROGS but fails if no tool was found.
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+
+
+# Like BASIC_SETUP_TOOL but fails if no tool was found.
+# $1: variable to set
+# $2: autoconf macro to call to look for the special tool
 
 
 # Setup the most fundamental tools that relies on not much else to set up,
@@ -3206,6 +3411,12 @@
 # Setup basic configuration paths, and platform-specific stuff related to PATHs.
 
 
+# Evaluates platform specific overrides for devkit variables.
+# $1: Name of variable
+
+
+
+
 
 
 
@@ -3406,7 +3617,7 @@
 
 
 #
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2018, 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
@@ -3450,7 +3661,95 @@
 
 
 #
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2018, 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.
+#
+
+
+
+
+
+# Documentation on common flags used for solstudio in HIGHEST.
+#
+# WARNING: Use of OPTIMIZATION_LEVEL=HIGHEST in your Makefile needs to be
+#          done with care, there are some assumptions below that need to
+#          be understood about the use of pointers, and IEEE behavior.
+#
+# -fns: Use non-standard floating point mode (not IEEE 754)
+# -fsimple: Do some simplification of floating point arithmetic (not IEEE 754)
+# -fsingle: Use single precision floating point with 'float'
+# -xalias_level=basic: Assume memory references via basic pointer types do not alias
+#   (Source with excessing pointer casting and data access with mixed
+#    pointer types are not recommended)
+# -xbuiltin=%all: Use intrinsic or inline versions for math/std functions
+#   (If you expect perfect errno behavior, do not use this)
+# -xdepend: Loop data dependency optimizations (need -xO3 or higher)
+# -xrestrict: Pointer parameters to functions do not overlap
+#   (Similar to -xalias_level=basic usage, but less obvious sometimes.
+#    If you pass in multiple pointers to the same data, do not use this)
+# -xlibmil: Inline some library routines
+#   (If you expect perfect errno behavior, do not use this)
+# -xlibmopt: Use optimized math routines (CURRENTLY DISABLED)
+#   (If you expect perfect errno behavior, do not use this)
+#  Can cause undefined external on Solaris 8 X86 on __sincos, removing for now
+
+    # FIXME: this will never happen since sparc != sparcv9, ie 32 bit, which we don't build anymore.
+    # Bug?
+    #if test "x$OPENJDK_TARGET_CPU" = xsparc; then
+    #  CFLAGS_JDK="${CFLAGS_JDK} -xmemalign=4s"
+    #  CXXFLAGS_JDK="${CXXFLAGS_JDK} -xmemalign=4s"
+    #fi
+
+
+
+
+
+
+# FLAGS_C_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
+#                                  [RUN-IF-FALSE])
+# ------------------------------------------------------------
+# Check that the C compiler supports an argument
+
+
+# FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
+#                                    [RUN-IF-FALSE])
+# ------------------------------------------------------------
+# Check that the C++ compiler supports an argument
+
+
+# FLAGS_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
+#                                [RUN-IF-FALSE])
+# ------------------------------------------------------------
+# Check that the C and C++ compilers support an argument
+
+
+
+
+
+
+
+#
+# Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -3493,20 +3792,18 @@
       HELP_MSG="You might be able to fix this by running '$PKGHANDLER_COMMAND'."
       ;;
     freetype)
-      if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
-        HELP_MSG="To install freetype, run:
-wget \"http://gnuwin32.sourceforge.net/downlinks/freetype.php\" -O /tmp/freetype-setup.exe
-chmod +x /tmp/freetype-setup.exe
-/tmp/freetype-setup.exe
-Follow GUI prompts, and install to default directory \"C:\Program Files (x86)\GnuWin32\".
-After installation, locate lib/libfreetype.dll.a and make a copy with the name freetype.dll."
-      else
-        HELP_MSG="You need to build a 64-bit version of freetype.
-This is not readily available.
-You can find source code and build instructions on
-http://www.freetype.org/
-If you put the resulting build in \"C:\Program Files\GnuWin32\", it will be found automatically."
-      fi
+      HELP_MSG="
+The freetype library can now be build during the configure process.
+Download the freetype sources and unpack them into an arbitrary directory:
+
+wget http://download.savannah.gnu.org/releases/freetype/freetype-2.5.3.tar.gz
+tar -xzf freetype-2.5.3.tar.gz
+
+Then run configure with '--with-freetype-src=<freetype_src>'. This will
+automatically build the freetype library into '<freetype_src>/lib64' for 64-bit
+builds or into '<freetype_src>/lib32' for 32-bit builds.
+Afterwards you can always use '--with-freetype-include=<freetype_src>/include'
+and '--with-freetype-lib=<freetype_src>/lib32|64' for other builds."
       ;;
   esac
 }
@@ -3569,10 +3866,16 @@
   PKGHANDLER_COMMAND=""
 }
 
-
-
-#
-# Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
+# This function will check if we're called from the "configure" wrapper while
+# printing --help. If so, we will print out additional information that can
+# only be extracted within the autoconf script, and then exit. This must be
+# called at the very beginning in configure.ac.
+
+
+
+
+#
+# Copyright (c) 2011, 2018, 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
@@ -3636,7 +3939,7 @@
 
 
 #
-# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2018, 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
@@ -3676,6 +3979,10 @@
 
 
 
+
+
+
+
 #
 # Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -3800,8 +4107,37 @@
 # questions.
 #
 
+########################################################################
+# This file is responsible for detecting, verifying and setting up the
+# toolchain, i.e. the compiler, linker and related utilities. It will setup
+# proper paths to the binaries, but it will not setup any flags.
+#
+# The binaries used is determined by the toolchain type, which is the family of
+# compilers and related tools that are used.
+########################################################################
+
+
+# All valid toolchains, regardless of platform (used by help.m4)
+VALID_TOOLCHAINS_all="gcc clang solstudio xlc microsoft"
+
+# These toolchains are valid on different platforms
+VALID_TOOLCHAINS_linux="gcc clang"
+VALID_TOOLCHAINS_solaris="solstudio"
+VALID_TOOLCHAINS_macosx="gcc clang"
+VALID_TOOLCHAINS_aix="xlc"
+VALID_TOOLCHAINS_windows="microsoft"
+
+# Toolchain descriptions
+TOOLCHAIN_DESCRIPTION_clang="clang/LLVM"
+TOOLCHAIN_DESCRIPTION_gcc="GNU Compiler Collection"
+TOOLCHAIN_DESCRIPTION_microsoft="Microsoft Visual Studio"
+TOOLCHAIN_DESCRIPTION_solstudio="Oracle Solaris Studio"
+TOOLCHAIN_DESCRIPTION_xlc="IBM XL C/C++"
+
 # Prepare the system so that TOOLCHAIN_CHECK_COMPILER_VERSION can be called.
 # Must have CC_VERSION_NUMBER and CXX_VERSION_NUMBER.
+# $1 - optional variable prefix for compiler and version variables (BUILD_)
+# $2 - optional variable prefix for comparable variable (OPENJDK_BUILD_)
 
 
 # Check if the configured compiler (C and C++) is of a specific version or
@@ -3813,56 +4149,70 @@
 #   $3:   block to run if the compiler is older than this version (<)
 
 
+
+# Setup a number of variables describing how native output files are
+# named on this platform/toolchain.
+
+
+# Determine which toolchain type to use, and make sure it is valid for this
+# platform. Setup various information about the selected toolchain.
+
+
+# Before we start detecting the toolchain executables, we might need some
+# special setup, e.g. additional paths etc.
+
+
+# Restore path, etc
+
+
+# Check if a compiler is of the toolchain type we expect, and save the version
+# information from it. If the compiler does not match the expected type,
+# this function will abort using AC_MSG_ERROR. If it matches, the version will
+# be stored in CC_VERSION_NUMBER/CXX_VERSION_NUMBER (as a dotted number), and
+# the full version string in CC_VERSION_STRING/CXX_VERSION_STRING.
+#
 # $1 = compiler to test (CC or CXX)
 # $2 = human readable name of compiler (C or C++)
 
 
 
-
-
+# Try to locate the given C or C++ compiler in the path, or otherwise.
+#
 # $1 = compiler to test (CC or CXX)
 # $2 = human readable name of compiler (C or C++)
 # $3 = list of compiler names to search for
 
 
-
-
-
-
-
-
-
-
-
-
-
-# TOOLCHAIN_C_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
-#                                      [RUN-IF-FALSE])
-# ------------------------------------------------------------
-# Check that the C compiler supports an argument
-
-
-# TOOLCHAIN_CXX_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
-#                                        [RUN-IF-FALSE])
-# ------------------------------------------------------------
-# Check that the C++ compiler supports an argument
-
-
-# TOOLCHAIN_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
-#                                    [RUN-IF-FALSE])
-# ------------------------------------------------------------
-# Check that the C and C++ compilers support an argument
-
-
-
-
-# Setup the JTREG paths
-
-
-
-
-#
-# Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+# Detect the core components of the toolchain, i.e. the compilers (CC and CXX),
+# preprocessor (CPP and CXXCPP), the linker (LD), the assembler (AS) and the
+# archiver (AR). Verify that the compilers are correct according to the
+# toolchain type.
+
+
+# Setup additional tools that is considered a part of the toolchain, but not the
+# core part. Many of these are highly platform-specific and do not exist,
+# and/or are not needed on all platforms.
+
+
+# Setup the build tools (i.e, the compiler and linker used to build programs
+# that should be run on the build platform, not the target platform, as a build
+# helper). Since the non-cross-compile case uses the normal, target compilers
+# for this, we can only do this after these have been setup.
+
+
+# Setup legacy variables that are still needed as alternative ways to refer to
+# parts of the toolchain.
+
+
+# Do some additional checks on the detected tools.
+
+
+# Setup the JTReg Regression Test Harness.
+
+
+
+#
+# Copyright (c) 2011, 2018, 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
@@ -3886,12 +4236,83 @@
 # questions.
 #
 
-
-
-
-
-
-
+################################################################################
+# The order of these defines the priority by which we try to find them.
+VALID_VS_VERSIONS="2010 2012 2013 2015 2017"
+
+VS_DESCRIPTION_2010="Microsoft Visual Studio 2010"
+VS_VERSION_INTERNAL_2010=100
+VS_MSVCR_2010=msvcr100.dll
+# We don't use msvcp on Visual Studio 2010
+#VS_MSVCP_2010=msvcp100.dll
+VS_ENVVAR_2010="VS100COMNTOOLS"
+VS_VS_INSTALLDIR_2010="Microsoft Visual Studio 10.0"
+VS_SDK_INSTALLDIR_2010="Microsoft SDKs/Windows/v7.1"
+VS_VS_PLATFORM_NAME_2010="v100"
+VS_SDK_PLATFORM_NAME_2010="Windows7.1SDK"
+
+VS_DESCRIPTION_2012="Microsoft Visual Studio 2012"
+VS_VERSION_INTERNAL_2012=110
+VS_MSVCR_2012=msvcr110.dll
+VS_MSVCP_2012=msvcp110.dll
+VS_ENVVAR_2012="VS110COMNTOOLS"
+VS_VS_INSTALLDIR_2012="Microsoft Visual Studio 11.0"
+VS_SDK_INSTALLDIR_2012=
+VS_VS_PLATFORM_NAME_2012="v110"
+VS_SDK_PLATFORM_NAME_2012=
+
+VS_DESCRIPTION_2013="Microsoft Visual Studio 2013"
+VS_VERSION_INTERNAL_2013=120
+VS_MSVCR_2013=msvcr120.dll
+VS_MSVCP_2013=msvcp120.dll
+VS_ENVVAR_2013="VS120COMNTOOLS"
+VS_VS_INSTALLDIR_2013="Microsoft Visual Studio 12.0"
+VS_SDK_INSTALLDIR_2013=
+VS_VS_PLATFORM_NAME_2013="v120"
+VS_SDK_PLATFORM_NAME_2013=
+
+VS_DESCRIPTION_2015="Microsoft Visual Studio 2015 - CURRENTLY NOT WORKING"
+VS_VERSION_INTERNAL_2015=140
+VS_MSVCR_2015=vcruntime140.dll
+VS_MSVCP_2015=msvcp140.dll
+VS_ENVVAR_2015="VS140COMNTOOLS"
+VS_VS_INSTALLDIR_2015="Microsoft Visual Studio 14.0"
+VS_SDK_INSTALLDIR_2015=
+VS_VS_PLATFORM_NAME_2015="v140"
+VS_SDK_PLATFORM_NAME_2015=
+# The vcvars of 2015 breaks if 2017 is also installed. Work around this by
+# explicitly specifying Windows Kit 8.1 to be used.
+VS_ENV_ARGS_2015="8.1"
+
+VS_DESCRIPTION_2017="Microsoft Visual Studio 2017 - CURRENTLY NOT WORKING"
+VS_VERSION_INTERNAL_2017=141
+VS_MSVCR_2017=vcruntime140.dll
+VS_MSVCP_2017=msvcp140.dll
+VS_ENVVAR_2017="VS150COMNTOOLS"
+VS_VS_INSTALLDIR_2017="Microsoft Visual Studio/2017"
+VS_EDITIONS_2017="Community Professional Enterprise"
+VS_SDK_INSTALLDIR_2017=
+VS_VS_PLATFORM_NAME_2017="v141"
+VS_SDK_PLATFORM_NAME_2017=
+
+################################################################################
+
+
+
+################################################################################
+
+
+
+################################################################################
+# Finds the bat or cmd file in Visual Studio or the SDK that sets up a proper
+# build environment and assigns it to VS_ENV_CMD
+
+
+################################################################################
+
+
+
+################################################################################
 # Check if the VS env variables were setup prior to running configure.
 # If not, then find vcvarsall.bat and run it automatically, and integrate
 # the set env variables into the spec file.
@@ -3906,13 +4327,16 @@
 
 
 
+
+
+
 # This line needs to be here, verbatim, after all includes and the dummy hook
 # definitions. It is replaced with custom functionality when building
 # custom sources.
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1523388104
+DATE_WHEN_GENERATED=1533314440
 
 ###############################################################################
 #
@@ -3923,7 +4347,25 @@
 #
 ###############################################################################
 
-# Basic initialization that must happen first of all
+# If we are requested to print additional help, do that and then exit.
+# This must be the very first call.
+
+  if test "x$CONFIGURE_PRINT_TOOLCHAIN_LIST" != x; then
+    $PRINTF "The following toolchains are available as arguments to --with-toolchain-type.\n"
+    $PRINTF "Which are valid to use depends on the build platform.\n"
+    for toolchain in $VALID_TOOLCHAINS_all; do
+      # Use indirect variable referencing
+      toolchain_var_name=TOOLCHAIN_DESCRIPTION_$toolchain
+      TOOLCHAIN_DESCRIPTION=${!toolchain_var_name}
+      $PRINTF "  %-10s  %s\n" $toolchain "$TOOLCHAIN_DESCRIPTION"
+    done
+
+    # And now exit directly
+    exit 0
+  fi
+
+
+# Basic initialization that must happen first of all in the normal process.
 
   # Save the original command line. This is passed to us by the wrapper configure script.
 
@@ -3935,7 +4377,6 @@
 $as_echo "$as_me: configure script generated at timestamp $DATE_WHEN_GENERATED." >&6;}
 
 
-
   # 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
@@ -3944,7 +4385,14 @@
 
   # First are all the simple required tools.
 
-  for ac_prog in basename
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$BASENAME" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in basename
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -3989,21 +4437,155 @@
   test -n "$BASENAME" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !BASENAME! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!BASENAME!/}
+    if test "x$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 "xBASENAME" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of BASENAME from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of BASENAME from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in basename
+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_BASENAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASENAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASENAME="$BASENAME" # 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_BASENAME="$as_dir/$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
+BASENAME=$ac_cv_path_BASENAME
+if test -n "$BASENAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASENAME" >&5
+$as_echo "$BASENAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$BASENAME" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_BASENAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASENAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASENAME="$BASENAME" # 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_BASENAME="$as_dir/$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
+BASENAME=$ac_cv_path_BASENAME
+if test -n "$BASENAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASENAME" >&5
+$as_echo "$BASENAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool BASENAME=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASENAME" >&5
+$as_echo_n "checking for BASENAME... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$BASENAME" = x; then
-    if test "xbasename" = x; then
-      PROG_NAME=basename
-    else
-      PROG_NAME=basename
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in bash
+    as_fn_error $? "Could not find required tool for BASENAME" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$BASH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in bash
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4048,21 +4630,155 @@
   test -n "$BASH" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !BASH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!BASH!/}
+    if test "x$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 "xBASH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of BASH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of BASH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in bash
+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_BASH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASH="$BASH" # 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_BASH="$as_dir/$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
+BASH=$ac_cv_path_BASH
+if test -n "$BASH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASH" >&5
+$as_echo "$BASH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$BASH" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_BASH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASH="$BASH" # 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_BASH="$as_dir/$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
+BASH=$ac_cv_path_BASH
+if test -n "$BASH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASH" >&5
+$as_echo "$BASH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool BASH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASH" >&5
+$as_echo_n "checking for BASH... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$BASH" = x; then
-    if test "xbash" = x; then
-      PROG_NAME=bash
-    else
-      PROG_NAME=bash
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cat
+    as_fn_error $? "Could not find required tool for BASH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CAT" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cat
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4107,21 +4823,155 @@
   test -n "$CAT" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CAT! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CAT!/}
+    if test "x$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 "xCAT" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CAT from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CAT from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cat
+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_CAT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CAT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CAT="$CAT" # 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_CAT="$as_dir/$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
+CAT=$ac_cv_path_CAT
+if test -n "$CAT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CAT" >&5
+$as_echo "$CAT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CAT" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_CAT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CAT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CAT="$CAT" # 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_CAT="$as_dir/$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
+CAT=$ac_cv_path_CAT
+if test -n "$CAT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CAT" >&5
+$as_echo "$CAT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CAT=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CAT" >&5
+$as_echo_n "checking for CAT... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CAT" = x; then
-    if test "xcat" = x; then
-      PROG_NAME=cat
-    else
-      PROG_NAME=cat
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in chmod
+    as_fn_error $? "Could not find required tool for CAT" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CHMOD" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in chmod
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4166,21 +5016,155 @@
   test -n "$CHMOD" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CHMOD! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CHMOD!/}
+    if test "x$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 "xCHMOD" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CHMOD from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CHMOD from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in chmod
+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_CHMOD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CHMOD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CHMOD="$CHMOD" # 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_CHMOD="$as_dir/$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
+CHMOD=$ac_cv_path_CHMOD
+if test -n "$CHMOD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CHMOD" >&5
+$as_echo "$CHMOD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CHMOD" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_CHMOD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CHMOD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CHMOD="$CHMOD" # 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_CHMOD="$as_dir/$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
+CHMOD=$ac_cv_path_CHMOD
+if test -n "$CHMOD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CHMOD" >&5
+$as_echo "$CHMOD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CHMOD=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CHMOD" >&5
+$as_echo_n "checking for CHMOD... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CHMOD" = x; then
-    if test "xchmod" = x; then
-      PROG_NAME=chmod
-    else
-      PROG_NAME=chmod
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cmp
+    as_fn_error $? "Could not find required tool for CHMOD" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CMP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cmp
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4225,21 +5209,155 @@
   test -n "$CMP" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CMP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CMP!/}
+    if test "x$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 "xCMP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CMP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CMP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cmp
+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_CMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CMP="$CMP" # 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_CMP="$as_dir/$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
+CMP=$ac_cv_path_CMP
+if test -n "$CMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CMP" >&5
+$as_echo "$CMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CMP" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_CMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CMP="$CMP" # 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_CMP="$as_dir/$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
+CMP=$ac_cv_path_CMP
+if test -n "$CMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CMP" >&5
+$as_echo "$CMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CMP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CMP" >&5
+$as_echo_n "checking for CMP... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CMP" = x; then
-    if test "xcmp" = x; then
-      PROG_NAME=cmp
-    else
-      PROG_NAME=cmp
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in comm
+    as_fn_error $? "Could not find required tool for CMP" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$COMM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in comm
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4284,21 +5402,155 @@
   test -n "$COMM" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !COMM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!COMM!/}
+    if test "x$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 "xCOMM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of COMM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of COMM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in comm
+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_COMM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $COMM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_COMM="$COMM" # 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_COMM="$as_dir/$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
+COMM=$ac_cv_path_COMM
+if test -n "$COMM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $COMM" >&5
+$as_echo "$COMM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$COMM" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_COMM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $COMM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_COMM="$COMM" # 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_COMM="$as_dir/$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
+COMM=$ac_cv_path_COMM
+if test -n "$COMM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $COMM" >&5
+$as_echo "$COMM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool COMM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for COMM" >&5
+$as_echo_n "checking for COMM... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$COMM" = x; then
-    if test "xcomm" = x; then
-      PROG_NAME=comm
-    else
-      PROG_NAME=comm
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cp
+    as_fn_error $? "Could not find required tool for COMM" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cp
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4343,80 +5595,155 @@
   test -n "$CP" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CP!/}
+    if test "x$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 "xCP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cp
+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_CP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CP="$CP" # 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_CP="$as_dir/$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
+CP=$ac_cv_path_CP
+if test -n "$CP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CP" >&5
+$as_echo "$CP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CP" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_CP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CP="$CP" # 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_CP="$as_dir/$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
+CP=$ac_cv_path_CP
+if test -n "$CP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CP" >&5
+$as_echo "$CP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CP" >&5
+$as_echo_n "checking for CP... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CP" = x; then
-    if test "xcp" = x; then
-      PROG_NAME=cp
-    else
-      PROG_NAME=cp
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cpio
-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_CPIO+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $CPIO in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_CPIO="$CPIO" # 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_CPIO="$as_dir/$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
-CPIO=$ac_cv_path_CPIO
-if test -n "$CPIO"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPIO" >&5
-$as_echo "$CPIO" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$CPIO" && break
-done
-
-
-  if test "x$CPIO" = x; then
-    if test "xcpio" = x; then
-      PROG_NAME=cpio
-    else
-      PROG_NAME=cpio
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cut
+    as_fn_error $? "Could not find required tool for CP" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CUT" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cut
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4461,21 +5788,155 @@
   test -n "$CUT" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CUT! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CUT!/}
+    if test "x$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 "xCUT" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CUT from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CUT from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cut
+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_CUT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CUT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CUT="$CUT" # 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_CUT="$as_dir/$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
+CUT=$ac_cv_path_CUT
+if test -n "$CUT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CUT" >&5
+$as_echo "$CUT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CUT" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_CUT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CUT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CUT="$CUT" # 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_CUT="$as_dir/$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
+CUT=$ac_cv_path_CUT
+if test -n "$CUT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CUT" >&5
+$as_echo "$CUT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CUT=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CUT" >&5
+$as_echo_n "checking for CUT... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CUT" = x; then
-    if test "xcut" = x; then
-      PROG_NAME=cut
-    else
-      PROG_NAME=cut
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in date
+    as_fn_error $? "Could not find required tool for CUT" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DATE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in date
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4520,21 +5981,155 @@
   test -n "$DATE" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DATE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DATE!/}
+    if test "x$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 "xDATE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DATE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DATE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in date
+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_DATE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DATE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DATE="$DATE" # 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_DATE="$as_dir/$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
+DATE=$ac_cv_path_DATE
+if test -n "$DATE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DATE" >&5
+$as_echo "$DATE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DATE" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_DATE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DATE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DATE="$DATE" # 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_DATE="$as_dir/$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
+DATE=$ac_cv_path_DATE
+if test -n "$DATE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DATE" >&5
+$as_echo "$DATE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DATE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DATE" >&5
+$as_echo_n "checking for DATE... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$DATE" = x; then
-    if test "xdate" = x; then
-      PROG_NAME=date
-    else
-      PROG_NAME=date
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in gdiff diff
+    as_fn_error $? "Could not find required tool for DATE" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DIFF" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in gdiff diff
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4579,21 +6174,155 @@
   test -n "$DIFF" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DIFF! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DIFF!/}
+    if test "x$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 "xDIFF" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DIFF from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DIFF from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in gdiff diff
+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_DIFF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIFF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIFF="$DIFF" # 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_DIFF="$as_dir/$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
+DIFF=$ac_cv_path_DIFF
+if test -n "$DIFF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIFF" >&5
+$as_echo "$DIFF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DIFF" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_DIFF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIFF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIFF="$DIFF" # 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_DIFF="$as_dir/$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
+DIFF=$ac_cv_path_DIFF
+if test -n "$DIFF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIFF" >&5
+$as_echo "$DIFF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DIFF=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIFF" >&5
+$as_echo_n "checking for DIFF... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$DIFF" = x; then
-    if test "xgdiff diff" = x; then
-      PROG_NAME=diff
-    else
-      PROG_NAME=gdiff diff
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in dirname
+    as_fn_error $? "Could not find required tool for DIFF" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DIRNAME" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in dirname
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4638,21 +6367,155 @@
   test -n "$DIRNAME" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DIRNAME! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DIRNAME!/}
+    if test "x$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 "xDIRNAME" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DIRNAME from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DIRNAME from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in dirname
+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_DIRNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIRNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIRNAME="$DIRNAME" # 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_DIRNAME="$as_dir/$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
+DIRNAME=$ac_cv_path_DIRNAME
+if test -n "$DIRNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIRNAME" >&5
+$as_echo "$DIRNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DIRNAME" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_DIRNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIRNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIRNAME="$DIRNAME" # 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_DIRNAME="$as_dir/$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
+DIRNAME=$ac_cv_path_DIRNAME
+if test -n "$DIRNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIRNAME" >&5
+$as_echo "$DIRNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DIRNAME=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIRNAME" >&5
+$as_echo_n "checking for DIRNAME... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$DIRNAME" = x; then
-    if test "xdirname" = x; then
-      PROG_NAME=dirname
-    else
-      PROG_NAME=dirname
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in echo
+    as_fn_error $? "Could not find required tool for DIRNAME" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$ECHO" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in echo
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4697,21 +6560,155 @@
   test -n "$ECHO" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !ECHO! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!ECHO!/}
+    if test "x$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 "xECHO" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of ECHO from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of ECHO from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in echo
+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_ECHO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ECHO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ECHO="$ECHO" # 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_ECHO="$as_dir/$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
+ECHO=$ac_cv_path_ECHO
+if test -n "$ECHO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ECHO" >&5
+$as_echo "$ECHO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ECHO" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_ECHO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ECHO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ECHO="$ECHO" # 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_ECHO="$as_dir/$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
+ECHO=$ac_cv_path_ECHO
+if test -n "$ECHO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ECHO" >&5
+$as_echo "$ECHO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool ECHO=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ECHO" >&5
+$as_echo_n "checking for ECHO... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$ECHO" = x; then
-    if test "xecho" = x; then
-      PROG_NAME=echo
-    else
-      PROG_NAME=echo
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in expr
+    as_fn_error $? "Could not find required tool for ECHO" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$EXPR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in expr
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4756,21 +6753,155 @@
   test -n "$EXPR" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !EXPR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!EXPR!/}
+    if test "x$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 "xEXPR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of EXPR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of EXPR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in expr
+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_EXPR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $EXPR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_EXPR="$EXPR" # 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_EXPR="$as_dir/$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
+EXPR=$ac_cv_path_EXPR
+if test -n "$EXPR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $EXPR" >&5
+$as_echo "$EXPR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$EXPR" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_EXPR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $EXPR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_EXPR="$EXPR" # 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_EXPR="$as_dir/$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
+EXPR=$ac_cv_path_EXPR
+if test -n "$EXPR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $EXPR" >&5
+$as_echo "$EXPR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool EXPR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EXPR" >&5
+$as_echo_n "checking for EXPR... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$EXPR" = x; then
-    if test "xexpr" = x; then
-      PROG_NAME=expr
-    else
-      PROG_NAME=expr
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in file
+    as_fn_error $? "Could not find required tool for EXPR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$FILE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in file
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4815,21 +6946,155 @@
   test -n "$FILE" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !FILE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!FILE!/}
+    if test "x$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 "xFILE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of FILE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of FILE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in file
+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_FILE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FILE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FILE="$FILE" # 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_FILE="$as_dir/$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
+FILE=$ac_cv_path_FILE
+if test -n "$FILE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FILE" >&5
+$as_echo "$FILE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$FILE" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_FILE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FILE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FILE="$FILE" # 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_FILE="$as_dir/$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
+FILE=$ac_cv_path_FILE
+if test -n "$FILE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FILE" >&5
+$as_echo "$FILE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool FILE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FILE" >&5
+$as_echo_n "checking for FILE... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$FILE" = x; then
-    if test "xfile" = x; then
-      PROG_NAME=file
-    else
-      PROG_NAME=file
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in find
+    as_fn_error $? "Could not find required tool for FILE" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$FIND" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in find
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4874,21 +7139,155 @@
   test -n "$FIND" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !FIND! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!FIND!/}
+    if test "x$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 "xFIND" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of FIND from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of FIND from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in find
+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_FIND+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FIND in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FIND="$FIND" # 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_FIND="$as_dir/$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
+FIND=$ac_cv_path_FIND
+if test -n "$FIND"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FIND" >&5
+$as_echo "$FIND" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$FIND" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_FIND+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FIND in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FIND="$FIND" # 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_FIND="$as_dir/$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
+FIND=$ac_cv_path_FIND
+if test -n "$FIND"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FIND" >&5
+$as_echo "$FIND" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool FIND=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FIND" >&5
+$as_echo_n "checking for FIND... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$FIND" = x; then
-    if test "xfind" = x; then
-      PROG_NAME=find
-    else
-      PROG_NAME=find
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in head
+    as_fn_error $? "Could not find required tool for FIND" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$HEAD" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in head
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4933,21 +7332,155 @@
   test -n "$HEAD" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !HEAD! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!HEAD!/}
+    if test "x$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 "xHEAD" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of HEAD from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of HEAD from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in head
+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_HEAD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $HEAD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_HEAD="$HEAD" # 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_HEAD="$as_dir/$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
+HEAD=$ac_cv_path_HEAD
+if test -n "$HEAD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HEAD" >&5
+$as_echo "$HEAD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$HEAD" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_HEAD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $HEAD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_HEAD="$HEAD" # 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_HEAD="$as_dir/$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
+HEAD=$ac_cv_path_HEAD
+if test -n "$HEAD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HEAD" >&5
+$as_echo "$HEAD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool HEAD=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HEAD" >&5
+$as_echo_n "checking for HEAD... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$HEAD" = x; then
-    if test "xhead" = x; then
-      PROG_NAME=head
-    else
-      PROG_NAME=head
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in ln
+    as_fn_error $? "Could not find required tool for HEAD" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$LN" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in ln
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4992,21 +7525,155 @@
   test -n "$LN" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !LN! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!LN!/}
+    if test "x$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 "xLN" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of LN from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of LN from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in ln
+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_LN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LN="$LN" # 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_LN="$as_dir/$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
+LN=$ac_cv_path_LN
+if test -n "$LN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LN" >&5
+$as_echo "$LN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LN" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_LN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LN="$LN" # 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_LN="$as_dir/$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
+LN=$ac_cv_path_LN
+if test -n "$LN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LN" >&5
+$as_echo "$LN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool LN=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LN" >&5
+$as_echo_n "checking for LN... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$LN" = x; then
-    if test "xln" = x; then
-      PROG_NAME=ln
-    else
-      PROG_NAME=ln
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in ls
+    as_fn_error $? "Could not find required tool for LN" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$LS" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in ls
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5051,21 +7718,155 @@
   test -n "$LS" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !LS! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!LS!/}
+    if test "x$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 "xLS" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of LS from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of LS from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in ls
+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_LS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LS="$LS" # 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_LS="$as_dir/$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
+LS=$ac_cv_path_LS
+if test -n "$LS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LS" >&5
+$as_echo "$LS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LS" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_LS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LS="$LS" # 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_LS="$as_dir/$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
+LS=$ac_cv_path_LS
+if test -n "$LS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LS" >&5
+$as_echo "$LS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool LS=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LS" >&5
+$as_echo_n "checking for LS... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$LS" = x; then
-    if test "xls" = x; then
-      PROG_NAME=ls
-    else
-      PROG_NAME=ls
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in mkdir
+    as_fn_error $? "Could not find required tool for LS" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$MKDIR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in mkdir
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5110,21 +7911,155 @@
   test -n "$MKDIR" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !MKDIR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!MKDIR!/}
+    if test "x$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 "xMKDIR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of MKDIR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of MKDIR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in mkdir
+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_MKDIR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKDIR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKDIR="$MKDIR" # 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_MKDIR="$as_dir/$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
+MKDIR=$ac_cv_path_MKDIR
+if test -n "$MKDIR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR" >&5
+$as_echo "$MKDIR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MKDIR" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_MKDIR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKDIR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKDIR="$MKDIR" # 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_MKDIR="$as_dir/$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
+MKDIR=$ac_cv_path_MKDIR
+if test -n "$MKDIR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR" >&5
+$as_echo "$MKDIR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool MKDIR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKDIR" >&5
+$as_echo_n "checking for MKDIR... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$MKDIR" = x; then
-    if test "xmkdir" = x; then
-      PROG_NAME=mkdir
-    else
-      PROG_NAME=mkdir
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in mktemp
+    as_fn_error $? "Could not find required tool for MKDIR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$MKTEMP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in mktemp
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5169,21 +8104,155 @@
   test -n "$MKTEMP" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !MKTEMP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!MKTEMP!/}
+    if test "x$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 "xMKTEMP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of MKTEMP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of MKTEMP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in mktemp
+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_MKTEMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKTEMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKTEMP="$MKTEMP" # 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_MKTEMP="$as_dir/$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
+MKTEMP=$ac_cv_path_MKTEMP
+if test -n "$MKTEMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKTEMP" >&5
+$as_echo "$MKTEMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MKTEMP" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_MKTEMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKTEMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKTEMP="$MKTEMP" # 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_MKTEMP="$as_dir/$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
+MKTEMP=$ac_cv_path_MKTEMP
+if test -n "$MKTEMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKTEMP" >&5
+$as_echo "$MKTEMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool MKTEMP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKTEMP" >&5
+$as_echo_n "checking for MKTEMP... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$MKTEMP" = x; then
-    if test "xmktemp" = x; then
-      PROG_NAME=mktemp
-    else
-      PROG_NAME=mktemp
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in mv
+    as_fn_error $? "Could not find required tool for MKTEMP" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$MV" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in mv
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5228,21 +8297,348 @@
   test -n "$MV" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !MV! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!MV!/}
+    if test "x$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 "xMV" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of MV from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of MV from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in mv
+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_MV+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MV in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MV="$MV" # 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_MV="$as_dir/$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
+MV=$ac_cv_path_MV
+if test -n "$MV"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MV" >&5
+$as_echo "$MV" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MV" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_MV+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MV in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MV="$MV" # 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_MV="$as_dir/$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
+MV=$ac_cv_path_MV
+if test -n "$MV"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MV" >&5
+$as_echo "$MV" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool MV=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MV" >&5
+$as_echo_n "checking for MV... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$MV" = x; then
-    if test "xmv" = x; then
-      PROG_NAME=mv
-    else
-      PROG_NAME=mv
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in printf
+    as_fn_error $? "Could not find required tool for MV" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$NAWK" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in nawk gawk awk
+do
+  # Extract the first word of "$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_NAWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NAWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NAWK="$NAWK" # 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_NAWK="$as_dir/$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
+NAWK=$ac_cv_path_NAWK
+if test -n "$NAWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NAWK" >&5
+$as_echo "$NAWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$NAWK" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !NAWK! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!NAWK!/}
+    if test "x$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 "xNAWK" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of NAWK from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of NAWK from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in nawk gawk awk
+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_NAWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NAWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NAWK="$NAWK" # 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_NAWK="$as_dir/$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
+NAWK=$ac_cv_path_NAWK
+if test -n "$NAWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NAWK" >&5
+$as_echo "$NAWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$NAWK" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_NAWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NAWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NAWK="$NAWK" # 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_NAWK="$as_dir/$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
+NAWK=$ac_cv_path_NAWK
+if test -n "$NAWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NAWK" >&5
+$as_echo "$NAWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool NAWK=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NAWK" >&5
+$as_echo_n "checking for NAWK... " >&6; }
+        if test ! -x "$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 "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+  if test "x$NAWK" = x; then
+    as_fn_error $? "Could not find required tool for NAWK" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$PRINTF" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in printf
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5287,21 +8683,155 @@
   test -n "$PRINTF" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !PRINTF! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!PRINTF!/}
+    if test "x$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 "xPRINTF" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of PRINTF from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of PRINTF from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in printf
+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_PRINTF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $PRINTF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PRINTF="$PRINTF" # 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_PRINTF="$as_dir/$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
+PRINTF=$ac_cv_path_PRINTF
+if test -n "$PRINTF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PRINTF" >&5
+$as_echo "$PRINTF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$PRINTF" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_PRINTF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $PRINTF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PRINTF="$PRINTF" # 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_PRINTF="$as_dir/$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
+PRINTF=$ac_cv_path_PRINTF
+if test -n "$PRINTF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PRINTF" >&5
+$as_echo "$PRINTF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool PRINTF=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PRINTF" >&5
+$as_echo_n "checking for PRINTF... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$PRINTF" = x; then
-    if test "xprintf" = x; then
-      PROG_NAME=printf
-    else
-      PROG_NAME=printf
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in rm
+    as_fn_error $? "Could not find required tool for PRINTF" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$RM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in rm
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5346,21 +8876,155 @@
   test -n "$RM" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !RM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!RM!/}
+    if test "x$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 "xRM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of RM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of RM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in rm
+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_RM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $RM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_RM="$RM" # 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_RM="$as_dir/$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
+RM=$ac_cv_path_RM
+if test -n "$RM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RM" >&5
+$as_echo "$RM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$RM" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_RM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $RM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_RM="$RM" # 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_RM="$as_dir/$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
+RM=$ac_cv_path_RM
+if test -n "$RM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RM" >&5
+$as_echo "$RM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool RM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for RM" >&5
+$as_echo_n "checking for RM... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$RM" = x; then
-    if test "xrm" = x; then
-      PROG_NAME=rm
-    else
-      PROG_NAME=rm
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in sh
+    as_fn_error $? "Could not find required tool for RM" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$SH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in sh
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5405,21 +9069,155 @@
   test -n "$SH" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !SH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!SH!/}
+    if test "x$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 "xSH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of SH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of SH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in sh
+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_SH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SH="$SH" # 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_SH="$as_dir/$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
+SH=$ac_cv_path_SH
+if test -n "$SH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SH" >&5
+$as_echo "$SH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$SH" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_SH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SH="$SH" # 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_SH="$as_dir/$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
+SH=$ac_cv_path_SH
+if test -n "$SH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SH" >&5
+$as_echo "$SH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool SH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SH" >&5
+$as_echo_n "checking for SH... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$SH" = x; then
-    if test "xsh" = x; then
-      PROG_NAME=sh
-    else
-      PROG_NAME=sh
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in sort
+    as_fn_error $? "Could not find required tool for SH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$SORT" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in sort
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5464,21 +9262,155 @@
   test -n "$SORT" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !SORT! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!SORT!/}
+    if test "x$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 "xSORT" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of SORT from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of SORT from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in sort
+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_SORT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SORT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SORT="$SORT" # 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_SORT="$as_dir/$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
+SORT=$ac_cv_path_SORT
+if test -n "$SORT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SORT" >&5
+$as_echo "$SORT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$SORT" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_SORT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SORT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SORT="$SORT" # 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_SORT="$as_dir/$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
+SORT=$ac_cv_path_SORT
+if test -n "$SORT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SORT" >&5
+$as_echo "$SORT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool SORT=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SORT" >&5
+$as_echo_n "checking for SORT... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$SORT" = x; then
-    if test "xsort" = x; then
-      PROG_NAME=sort
-    else
-      PROG_NAME=sort
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tail
+    as_fn_error $? "Could not find required tool for SORT" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TAIL" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tail
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5523,21 +9455,155 @@
   test -n "$TAIL" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TAIL! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TAIL!/}
+    if test "x$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 "xTAIL" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TAIL from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TAIL from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tail
+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_TAIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAIL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAIL="$TAIL" # 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_TAIL="$as_dir/$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
+TAIL=$ac_cv_path_TAIL
+if test -n "$TAIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAIL" >&5
+$as_echo "$TAIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TAIL" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_TAIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAIL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAIL="$TAIL" # 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_TAIL="$as_dir/$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
+TAIL=$ac_cv_path_TAIL
+if test -n "$TAIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAIL" >&5
+$as_echo "$TAIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TAIL=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAIL" >&5
+$as_echo_n "checking for TAIL... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TAIL" = x; then
-    if test "xtail" = x; then
-      PROG_NAME=tail
-    else
-      PROG_NAME=tail
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tar
+    as_fn_error $? "Could not find required tool for TAIL" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TAR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tar
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5582,21 +9648,155 @@
   test -n "$TAR" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TAR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TAR!/}
+    if test "x$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 "xTAR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TAR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TAR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tar
+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_TAR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAR="$TAR" # 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_TAR="$as_dir/$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
+TAR=$ac_cv_path_TAR
+if test -n "$TAR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAR" >&5
+$as_echo "$TAR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TAR" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_TAR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAR="$TAR" # 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_TAR="$as_dir/$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
+TAR=$ac_cv_path_TAR
+if test -n "$TAR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAR" >&5
+$as_echo "$TAR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TAR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAR" >&5
+$as_echo_n "checking for TAR... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TAR" = x; then
-    if test "xtar" = x; then
-      PROG_NAME=tar
-    else
-      PROG_NAME=tar
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tee
+    as_fn_error $? "Could not find required tool for TAR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TEE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tee
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5641,21 +9841,155 @@
   test -n "$TEE" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TEE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TEE!/}
+    if test "x$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 "xTEE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TEE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TEE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tee
+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_TEE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TEE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TEE="$TEE" # 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_TEE="$as_dir/$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
+TEE=$ac_cv_path_TEE
+if test -n "$TEE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TEE" >&5
+$as_echo "$TEE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TEE" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_TEE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TEE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TEE="$TEE" # 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_TEE="$as_dir/$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
+TEE=$ac_cv_path_TEE
+if test -n "$TEE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TEE" >&5
+$as_echo "$TEE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TEE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TEE" >&5
+$as_echo_n "checking for TEE... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TEE" = x; then
-    if test "xtee" = x; then
-      PROG_NAME=tee
-    else
-      PROG_NAME=tee
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in touch
+    as_fn_error $? "Could not find required tool for TEE" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TOUCH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in touch
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5700,21 +10034,155 @@
   test -n "$TOUCH" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TOUCH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TOUCH!/}
+    if test "x$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 "xTOUCH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TOUCH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TOUCH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in touch
+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_TOUCH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TOUCH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TOUCH="$TOUCH" # 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_TOUCH="$as_dir/$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
+TOUCH=$ac_cv_path_TOUCH
+if test -n "$TOUCH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TOUCH" >&5
+$as_echo "$TOUCH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TOUCH" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_TOUCH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TOUCH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TOUCH="$TOUCH" # 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_TOUCH="$as_dir/$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
+TOUCH=$ac_cv_path_TOUCH
+if test -n "$TOUCH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TOUCH" >&5
+$as_echo "$TOUCH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TOUCH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TOUCH" >&5
+$as_echo_n "checking for TOUCH... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TOUCH" = x; then
-    if test "xtouch" = x; then
-      PROG_NAME=touch
-    else
-      PROG_NAME=touch
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tr
+    as_fn_error $? "Could not find required tool for TOUCH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tr
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5759,21 +10227,155 @@
   test -n "$TR" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TR!/}
+    if test "x$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 "xTR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tr
+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_TR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TR="$TR" # 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_TR="$as_dir/$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
+TR=$ac_cv_path_TR
+if test -n "$TR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TR" >&5
+$as_echo "$TR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TR" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_TR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TR="$TR" # 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_TR="$as_dir/$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
+TR=$ac_cv_path_TR
+if test -n "$TR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TR" >&5
+$as_echo "$TR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TR" >&5
+$as_echo_n "checking for TR... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TR" = x; then
-    if test "xtr" = x; then
-      PROG_NAME=tr
-    else
-      PROG_NAME=tr
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in uname
+    as_fn_error $? "Could not find required tool for TR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$UNAME" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in uname
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5818,21 +10420,155 @@
   test -n "$UNAME" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !UNAME! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!UNAME!/}
+    if test "x$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 "xUNAME" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of UNAME from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of UNAME from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in uname
+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_UNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNAME="$UNAME" # 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_UNAME="$as_dir/$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
+UNAME=$ac_cv_path_UNAME
+if test -n "$UNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNAME" >&5
+$as_echo "$UNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$UNAME" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_UNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNAME="$UNAME" # 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_UNAME="$as_dir/$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
+UNAME=$ac_cv_path_UNAME
+if test -n "$UNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNAME" >&5
+$as_echo "$UNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool UNAME=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNAME" >&5
+$as_echo_n "checking for UNAME... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$UNAME" = x; then
-    if test "xuname" = x; then
-      PROG_NAME=uname
-    else
-      PROG_NAME=uname
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in uniq
+    as_fn_error $? "Could not find required tool for UNAME" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$UNIQ" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in uniq
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5877,21 +10613,155 @@
   test -n "$UNIQ" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !UNIQ! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!UNIQ!/}
+    if test "x$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 "xUNIQ" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of UNIQ from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of UNIQ from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in uniq
+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_UNIQ+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNIQ in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNIQ="$UNIQ" # 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_UNIQ="$as_dir/$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
+UNIQ=$ac_cv_path_UNIQ
+if test -n "$UNIQ"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNIQ" >&5
+$as_echo "$UNIQ" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$UNIQ" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_UNIQ+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNIQ in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNIQ="$UNIQ" # 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_UNIQ="$as_dir/$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
+UNIQ=$ac_cv_path_UNIQ
+if test -n "$UNIQ"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNIQ" >&5
+$as_echo "$UNIQ" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool UNIQ=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNIQ" >&5
+$as_echo_n "checking for UNIQ... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$UNIQ" = x; then
-    if test "xuniq" = x; then
-      PROG_NAME=uniq
-    else
-      PROG_NAME=uniq
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in wc
+    as_fn_error $? "Could not find required tool for UNIQ" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$WC" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in wc
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5936,21 +10806,155 @@
   test -n "$WC" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !WC! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!WC!/}
+    if test "x$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 "xWC" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of WC from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of WC from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in wc
+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_WC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WC="$WC" # 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_WC="$as_dir/$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
+WC=$ac_cv_path_WC
+if test -n "$WC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WC" >&5
+$as_echo "$WC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$WC" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_WC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WC="$WC" # 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_WC="$as_dir/$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
+WC=$ac_cv_path_WC
+if test -n "$WC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WC" >&5
+$as_echo "$WC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool WC=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WC" >&5
+$as_echo_n "checking for WC... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$WC" = x; then
-    if test "xwc" = x; then
-      PROG_NAME=wc
-    else
-      PROG_NAME=wc
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in which
+    as_fn_error $? "Could not find required tool for WC" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$WHICH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in which
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5995,21 +10999,155 @@
   test -n "$WHICH" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !WHICH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!WHICH!/}
+    if test "x$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 "xWHICH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of WHICH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of WHICH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in which
+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_WHICH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WHICH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WHICH="$WHICH" # 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_WHICH="$as_dir/$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
+WHICH=$ac_cv_path_WHICH
+if test -n "$WHICH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WHICH" >&5
+$as_echo "$WHICH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$WHICH" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_WHICH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WHICH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WHICH="$WHICH" # 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_WHICH="$as_dir/$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
+WHICH=$ac_cv_path_WHICH
+if test -n "$WHICH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WHICH" >&5
+$as_echo "$WHICH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool WHICH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WHICH" >&5
+$as_echo_n "checking for WHICH... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$WHICH" = x; then
-    if test "xwhich" = x; then
-      PROG_NAME=which
-    else
-      PROG_NAME=which
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in xargs
+    as_fn_error $? "Could not find required tool for WHICH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$XARGS" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in xargs
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -6054,22 +11192,156 @@
   test -n "$XARGS" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !XARGS! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!XARGS!/}
+    if test "x$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 "xXARGS" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of XARGS from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of XARGS from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in xargs
+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_XARGS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $XARGS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_XARGS="$XARGS" # 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_XARGS="$as_dir/$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
+XARGS=$ac_cv_path_XARGS
+if test -n "$XARGS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $XARGS" >&5
+$as_echo "$XARGS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$XARGS" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_XARGS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $XARGS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_XARGS="$XARGS" # 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_XARGS="$as_dir/$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
+XARGS=$ac_cv_path_XARGS
+if test -n "$XARGS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $XARGS" >&5
+$as_echo "$XARGS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool XARGS=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XARGS" >&5
+$as_echo_n "checking for XARGS... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$XARGS" = x; then
-    if test "xxargs" = x; then
-      PROG_NAME=xargs
-    else
-      PROG_NAME=xargs
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
+    as_fn_error $? "Could not find required tool for XARGS" "$LINENO" 5
   fi
 
 
 
   # Then required tools that require some special treatment.
-  for ac_prog in gawk mawk nawk awk
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$AWK" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in gawk mawk nawk awk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -6111,19 +11383,150 @@
   test -n "$AWK" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !AWK! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!AWK!/}
+    if test "x$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 "xAWK" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of AWK from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of AWK from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in gawk mawk nawk awk
+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_AWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$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_AWK="$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
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$AWK" && 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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_AWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $AWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_AWK="$AWK" # 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_AWK="$as_dir/$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
+AWK=$ac_cv_path_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool AWK=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AWK" >&5
+$as_echo_n "checking for AWK... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
 
   if test "x$AWK" = x; then
-    if test "x" = x; then
-      PROG_NAME=awk
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+    as_fn_error $? "Could not find required tool for AWK" "$LINENO" 5
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$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; }
 if ${ac_cv_path_GREP+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -6186,19 +11589,171 @@
  GREP="$ac_cv_path_GREP"
 
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !GREP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!GREP!/}
+    if test "x$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 "xGREP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of GREP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of GREP from the environment. Use command line variables instead." >&2;}
+      fi
+      # 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; }
+if ${ac_cv_path_GREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$GREP"; then
+  ac_path_GREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in grep ggrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_GREP" || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+  # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'GREP' >> "conftest.nl"
+    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_GREP="$ac_path_GREP"
+      ac_path_GREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_GREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_GREP"; then
+    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+$as_echo "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+    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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_GREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $GREP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_GREP="$GREP" # 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_GREP="$as_dir/$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
+GREP=$ac_cv_path_GREP
+if test -n "$GREP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $GREP" >&5
+$as_echo "$GREP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool GREP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GREP" >&5
+$as_echo_n "checking for GREP... " >&6; }
+        if test ! -x "$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; }
+      fi
+    fi
+  fi
+
 
   if test "x$GREP" = x; then
-    if test "x" = x; then
-      PROG_NAME=grep
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+    as_fn_error $? "Could not find required tool for GREP" "$LINENO" 5
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$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; }
 if ${ac_cv_path_EGREP+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -6265,19 +11820,175 @@
  EGREP="$ac_cv_path_EGREP"
 
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !EGREP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!EGREP!/}
+    if test "x$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 "xEGREP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of EGREP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of EGREP from the environment. Use command line variables instead." >&2;}
+      fi
+      # 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; }
+if ${ac_cv_path_EGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+   then ac_cv_path_EGREP="$GREP -E"
+   else
+     if test -z "$EGREP"; then
+  ac_path_EGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in egrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP" || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+  # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'EGREP' >> "conftest.nl"
+    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_EGREP="$ac_path_EGREP"
+      ac_path_EGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_EGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_EGREP"; then
+    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_EGREP=$EGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+$as_echo "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+    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="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$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.
+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_EGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $EGREP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_EGREP="$EGREP" # 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_EGREP="$as_dir/$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
+EGREP=$ac_cv_path_EGREP
+if test -n "$EGREP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $EGREP" >&5
+$as_echo "$EGREP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$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=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool EGREP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EGREP" >&5
+$as_echo_n "checking for EGREP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5