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# Copyright (c) 2011, 2022, Oracle and/or its affiliates. All rights reserved.
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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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# This code is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 only, as
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# published by the Free Software Foundation. Oracle designates this
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# particular file as subject to the "Classpath" exception as provided
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# by Oracle in the LICENSE file that accompanied this code.
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# This code is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# version 2 for more details (a copy is included in the LICENSE file that
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# accompanied this code).
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# You should have received a copy of the GNU General Public License version
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# 2 along with this work; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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# or visit www.oracle.com if you need additional information or have any
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# Setup basic configuration paths, and platform-specific stuff related to PATHs.
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AC_DEFUN([BASIC_SETUP_PATHS_WINDOWS],
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if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
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# Clarify if it is wsl1 or wsl2, and use that as OS_ENV from this point forward
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$PATHTOOL -w / > /dev/null 2>&1
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if test $? -ne 0; then
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# Without Windows access to our root, it's definitely WSL1
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OPENJDK_BUILD_OS_ENV=windows.wsl1
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# This test is not guaranteed, but there is no documented way of
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# distinguishing between WSL1 and WSL2.
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# Check whether "Hyper-V" appears in /proc/interrupts because WSL2 runs on Hyper-V.
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$GREP -q Hyper-V /proc/interrupts
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if test $? -eq 0; then
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OPENJDK_BUILD_OS_ENV=windows.wsl2
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OPENJDK_BUILD_OS_ENV=windows.wsl1
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# This is a bit silly since we really don't have a target env as such,
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# but do it to keep consistency.
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OPENJDK_TARGET_OS_ENV=$OPENJDK_BUILD_OS_ENV
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if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys2"; then
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# Must be done prior to calling any commands to avoid mangling of command line
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export MSYS2_ARG_CONV_EXCL="*"
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AC_MSG_CHECKING([Windows environment type])
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WINENV_VENDOR=${OPENJDK_BUILD_OS_ENV#windows.}58
AC_MSG_RESULT([$WINENV_VENDOR])
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if test "x$WINENV_VENDOR" = x; then
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AC_MSG_ERROR([Unknown Windows environment. Neither cygwin, msys2, wsl1 nor wsl2 was detected.])
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if test "x$PATHTOOL" = x; then
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AC_MSG_ERROR([Incorrect $WINENV_VENDOR installation. Neither cygpath nor wslpath was found])
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if test "x$CMD" = x; then
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AC_MSG_ERROR([Incorrect Windows/$WINENV_VENDOR setup. Could not locate cmd.exe])
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AC_MSG_CHECKING([$WINENV_VENDOR drive prefix])
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WINENV_PREFIX=`$PATHTOOL -u c:/ | $SED -e 's!/c/!!'`
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AC_MSG_RESULT(['$WINENV_PREFIX'])
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AC_SUBST(WINENV_PREFIX)
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AC_MSG_CHECKING([$WINENV_VENDOR root directory as Windows path])
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if test "x$OPENJDK_BUILD_OS_ENV" != "xwindows.wsl1"; then
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WINENV_ROOT=`$PATHTOOL -w / 2> /dev/null`
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# msys2 has a trailing backslash; strip it
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WINENV_ROOT=${WINENV_ROOT%\\}83
WINENV_ROOT='[[unavailable]]'
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AC_MSG_RESULT(['$WINENV_ROOT'])
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AC_MSG_CHECKING([$WINENV_VENDOR temp directory])
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WINENV_TEMP_DIR=$($PATHTOOL -u $($CMD /q /c echo %TEMP% 2> /dev/null) | $TR -d '\r\n')
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AC_MSG_RESULT([$WINENV_TEMP_DIR])
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if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl2"; then
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# Don't trust the current directory for WSL2, but change to an OK temp dir
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# Bring along confdefs.h or autoconf gets all confused
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cp "$CONFIGURE_START_DIR/confdefs.h" "$WINENV_TEMP_DIR"
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AC_MSG_CHECKING([$WINENV_VENDOR release])
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WINENV_UNAME_RELEASE=`$UNAME -r`
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AC_MSG_RESULT([$WINENV_UNAME_RELEASE])
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AC_MSG_CHECKING([$WINENV_VENDOR version])
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WINENV_UNAME_VERSION=`$UNAME -v`
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AC_MSG_RESULT([$WINENV_UNAME_VERSION])
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WINENV_VERSION="$WINENV_UNAME_RELEASE, $WINENV_UNAME_VERSION"
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AC_MSG_CHECKING([Windows version])
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# We must change directory to one guaranteed to work, otherwise WSL1
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# can complain (since it does not have a WINENV_ROOT so it can't access
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# unix-style paths from Windows.
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# Additional [] needed to keep m4 from mangling shell constructs.
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[ WINDOWS_VERSION=`cd $WINENV_TEMP_DIR && $CMD /c ver | $EGREP -o '([0-9]+\.)+[0-9]+'` ]
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AC_MSG_RESULT([$WINDOWS_VERSION])
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# Additional handling per specific env
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if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
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# Additional [] needed to keep m4 from mangling shell constructs.
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[ CYGWIN_VERSION_OLD=`$ECHO $WINENV_UNAME_RELEASE | $GREP -e '^1\.[0-6]'` ]
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if test "x$CYGWIN_VERSION_OLD" != x; then
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AC_MSG_NOTICE([Your cygwin is too old. You are running $CYGWIN_RELEASE, but at least cygwin 1.7 is required. Please upgrade.])
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AC_MSG_ERROR([Cannot continue])
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if test "x$LDD" = x; then
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AC_MSG_ERROR([ldd is missing, which is needed on cygwin])
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WINENV_MARKER_DLL=cygwin1.dll
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elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys2"; then
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if test "x$LDD" = x; then
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AC_MSG_ERROR([ldd is missing, which is needed on msys2])
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WINENV_MARKER_DLL=msys-2.0.dll
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elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl1" || test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl2"; then
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AC_MSG_CHECKING([wsl distribution])
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WSL_DISTRIBUTION=`$LSB_RELEASE -d | sed 's/Description:\t//'`
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AC_MSG_RESULT([$WSL_DISTRIBUTION])
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WINENV_VERSION="$WINENV_VERSION ($WSL_DISTRIBUTION)"
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# Tell WSL to automatically translate the PATH variable
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# Chicken and egg: FIXPATH is needed for UTIL_FIXUP_PATH to work. So for the
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# first run we use the auto-detect abilities of fixpath.sh.
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FIXPATH_DIR="$TOPDIR/make/scripts"
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FIXPATH="$BASH $FIXPATH_DIR/fixpath.sh exec"
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FIXPATH_BASE="$BASH $FIXPATH_DIR/fixpath.sh"
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FIXPATH_SAVED_PATH="$PATH"
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UTIL_FIXUP_PATH(FIXPATH_DIR)
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# Now we can use FIXPATH_DIR to rewrite path to fixpath.sh properly.
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if test "x$WINENV_PREFIX" = x; then
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# On msys the prefix is empty, but we need to pass something to have the
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# fixpath.sh options parser happy.
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WINENV_PREFIX_ARG="NONE"
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WINENV_PREFIX_ARG="$WINENV_PREFIX"
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FIXPATH_ARGS="-e $PATHTOOL -p $WINENV_PREFIX_ARG -r ${WINENV_ROOT//\\/\\\\} -t $WINENV_TEMP_DIR -c $CMD -q"163
FIXPATH_BASE="$BASH $FIXPATH_DIR/fixpath.sh $FIXPATH_ARGS"
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FIXPATH="$FIXPATH_BASE exec"
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AC_SUBST(FIXPATH_BASE)
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SRC_ROOT_LENGTH=`$ECHO "$TOPDIR" | $WC -m`
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if test $SRC_ROOT_LENGTH -gt 100; then
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AC_MSG_ERROR([Your base path is too long. It is $SRC_ROOT_LENGTH characters long, but only 100 is supported])
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# Test if windows or unix "find" is first in path.
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AC_MSG_CHECKING([what kind of 'find' is first on the PATH])
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FIND_BINARY_OUTPUT=`find --version 2>&1`
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if test "x`echo $FIND_BINARY_OUTPUT | $GREP GNU`" != x; then
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AC_MSG_RESULT([unix style])
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elif test "x`echo $FIND_BINARY_OUTPUT | $GREP FIND`" != x; then
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AC_MSG_RESULT([Windows])
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AC_MSG_NOTICE([Your path contains Windows tools (C:\Windows\system32) before your unix tools.])
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AC_MSG_NOTICE([This will not work. Please correct and make sure /usr/bin (or similar) is first in path.])
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AC_MSG_ERROR([Cannot continue])
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AC_MSG_RESULT([unknown])
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AC_MSG_WARN([It seems that your find utility is non-standard.])
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if test "x$GIT" != x && test -e $TOPDIR/.git; then
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git_autocrlf=`$GIT config core.autocrlf`
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if test "x$git_autocrlf" != x && test "x$git_autocrlf" != "xfalse"; then
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AC_MSG_NOTICE([Your git configuration does not set core.autocrlf to false.])
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AC_MSG_NOTICE([If you checked out this code using that setting, the build WILL fail.])
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AC_MSG_NOTICE([To correct, run "git config --global core.autocrlf false" and re-clone the repo.])
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AC_MSG_WARN([Code is potentially incorrectly cloned. HIGH RISK of build failure!])
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# Verify that the directory is usable on Windows
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AC_DEFUN([BASIC_WINDOWS_VERIFY_DIR],
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if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl1"; then
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OUTPUTDIR_WIN=`$FIXPATH_BASE print $1`
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if test "x$OUTPUTDIR_WIN" = x; then
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AC_MSG_NOTICE([For wsl1, the $2 dir must be located on a Windows drive. Please see doc/building.md for details.])
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AC_MSG_ERROR([Cannot continue])
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# Create fixpath wrapper
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AC_DEFUN([BASIC_WINDOWS_FINALIZE_FIXPATH],
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if test "x$OPENJDK_BUILD_OS" = xwindows; then
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FIXPATH_CMDLINE=". $TOPDIR/make/scripts/fixpath.sh -e $PATHTOOL \
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-p $WINENV_PREFIX_ARG -r ${WINENV_ROOT//\\/\\\\} -t $WINENV_TEMP_DIR \219
$ECHO > $OUTPUTDIR/fixpath '#!/bin/bash'
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$ECHO >> $OUTPUTDIR/fixpath export PATH='"[$]PATH:'$PATH'"'
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$ECHO >> $OUTPUTDIR/fixpath $FIXPATH_CMDLINE '"[$]@"'
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$CHMOD +x $OUTPUTDIR/fixpath
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FIXPATH_BASE="$OUTPUTDIR/fixpath"
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FIXPATH="$FIXPATH_BASE exec"
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# Platform-specific finalization
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AC_DEFUN([BASIC_WINDOWS_FINALIZE],
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if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl2"; then
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# Change back from temp dir
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cd $CONFIGURE_START_DIR