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# Copyright (c) 2011, 2023, 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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########################################################################
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# This file handles detection of the Boot JDK. The Boot JDK detection
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# process has been developed as a response to solve a complex real-world
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# problem. Initially, it was simple, but it has grown as platform after
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# platform, idiosyncrasy after idiosyncrasy has been supported.
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# The basic idea is this:
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# 1) You need an acceptable *) JDK to use as a Boot JDK
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# 2) There are several ways to locate a JDK, that are mostly platform
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# 3) You can have multiple JDKs installed
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# 4) If possible, configure should try to dig out an acceptable JDK
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# automatically, without having to resort to command-line options
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# *) acceptable means e.g. JDK7 for building JDK8, a complete JDK (with
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# javac) and not a JRE, etc.
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# **) On Windows we typically use a well-known path.
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# On MacOSX we typically use the tool java_home.
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# On Linux we typically find javac in the $PATH, and then follow a
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# chain of symlinks that often ends up in a real JDK.
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# This leads to the code where we check in different ways to locate a
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# JDK, and if one is found, check if it is acceptable. If not, we print
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# our reasons for rejecting it (useful when debugging non-working
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# configure situations) and continue checking the next one.
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########################################################################
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# Execute the check given as argument, and verify the result
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# If the Boot JDK was previously found, do nothing
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# $1 A command line (typically autoconf macro) to execute
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AC_DEFUN([BOOTJDK_DO_CHECK],
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if test "x$BOOT_JDK_FOUND" = xno; then
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# Now execute the test
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# If previous step claimed to have found a JDK, check it to see if it seems to be valid.
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if test "x$BOOT_JDK_FOUND" = xmaybe; then
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# Do we have a bin/java?
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if test ! -x "$BOOT_JDK/bin/java" && test ! -x "$BOOT_JDK/bin/java.exe"; then
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AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK did not contain bin/java; ignoring])
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# Do we have a bin/javac?
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if test ! -x "$BOOT_JDK/bin/javac" && test ! -x "$BOOT_JDK/bin/javac.exe"; then
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AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK did not contain bin/javac; ignoring])
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AC_MSG_NOTICE([(This might be an JRE instead of an JDK)])
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# Oh, this is looking good! We probably have found a proper JDK. Is it the correct version?
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java_to_test="$BOOT_JDK/bin/java"
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UTIL_FIXUP_EXECUTABLE(java_to_test)
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BOOT_JDK_VERSION_OUTPUT=`$java_to_test $USER_BOOT_JDK_OPTIONS -version 2>&1`
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# Additional [] needed to keep m4 from mangling shell constructs.
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[ BOOT_JDK_VERSION=`echo $BOOT_JDK_VERSION_OUTPUT | $AWK '/version "[0-9a-zA-Z\._\-]+"/ {print $ 0; exit;}'` ]
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if [ [[ "$BOOT_JDK_VERSION" =~ "Picked up" ]] ]; then
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AC_MSG_NOTICE([You have _JAVA_OPTIONS or JAVA_TOOL_OPTIONS set. This can mess up the build. Please use --with-boot-jdk-jvmargs instead.])
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AC_MSG_NOTICE([Java reports: "$BOOT_JDK_VERSION".])
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AC_MSG_ERROR([Cannot continue])
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if [ [[ "$BOOT_JDK_VERSION" =~ "Unrecognized option" ]] ]; then
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AC_MSG_NOTICE([The specified --with-boot-jdk-jvmargs is invalid for the tested java])
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AC_MSG_NOTICE([Error message: "$BOOT_JDK_VERSION".])
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AC_MSG_NOTICE([Please fix arguments, or point to an explicit boot JDK which accept these arguments])
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AC_MSG_ERROR([Cannot continue])
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# Extra M4 quote needed to protect [] in grep expression.
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[FOUND_CORRECT_VERSION=`$ECHO $BOOT_JDK_VERSION \
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| $EGREP "\"(${DEFAULT_ACCEPTABLE_BOOT_VERSIONS// /|})([\.+-].*)?\""`]
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if test "x$BOOT_JDK_VERSION" = x; then
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AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is not a working JDK; ignoring])
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AC_MSG_NOTICE([Output from java -version was: $BOOT_JDK_VERSION_OUTPUT])
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elif test "x$FOUND_CORRECT_VERSION" = x; then
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AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is incorrect JDK version ($BOOT_JDK_VERSION); ignoring])
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AC_MSG_NOTICE([(Your Boot JDK version must be one of: $DEFAULT_ACCEPTABLE_BOOT_VERSIONS)])
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UTIL_FIXUP_PATH(BOOT_JDK)
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AC_MSG_CHECKING([for Boot JDK])
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AC_MSG_RESULT([$BOOT_JDK])
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AC_MSG_CHECKING([Boot JDK version])
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BOOT_JDK_VERSION=`$java_to_test $USER_BOOT_JDK_OPTIONS -version 2>&1 | $TR -d '\r'`
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# This is not a no-op; it will portably convert newline to space
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BOOT_JDK_VERSION=`$ECHO $BOOT_JDK_VERSION`
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AC_MSG_RESULT([$BOOT_JDK_VERSION])
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fi # end check jdk version
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fi # end check boot jdk found
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# Test: Is bootjdk explicitly set by command line arguments?
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AC_DEFUN([BOOTJDK_CHECK_ARGUMENTS],
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if test "x$with_boot_jdk" != x; then
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BOOT_JDK_ARG="$with_boot_jdk"
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UTIL_FIXUP_PATH(BOOT_JDK_ARG)
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if test -d "$BOOT_JDK_ARG"; then
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BOOT_JDK=$BOOT_JDK_ARG
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elif test -f "$BOOT_JDK_ARG"; then
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case "$BOOT_JDK_ARG" in
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BOOT_JDK_SUPPORT_DIR=$CONFIGURESUPPORT_OUTPUTDIR/boot-jdk
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$RM -rf $BOOT_JDK_SUPPORT_DIR
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$MKDIR -p $BOOT_JDK_SUPPORT_DIR
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$GUNZIP -c $BOOT_JDK_ARG | $TAR xf - -C $BOOT_JDK_SUPPORT_DIR
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# Try to find javac to determine BOOT_JDK path
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BOOT_JDK_JAVAC_PATH=`$FIND $BOOT_JDK_SUPPORT_DIR | $GREP "/bin/javac"`
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if test "x$BOOT_JDK_JAVAC_PATH" != x; then
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BOOT_JDK=$($DIRNAME $($DIRNAME $BOOT_JDK_JAVAC_PATH))
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AC_MSG_NOTICE([Found potential Boot JDK using configure arguments])
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# Test: Is $JAVA_HOME set?
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AC_DEFUN([BOOTJDK_CHECK_JAVA_HOME],
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if test "x$JAVA_HOME" != x; then
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JAVA_HOME_PROCESSED="$JAVA_HOME"
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UTIL_FIXUP_PATH(JAVA_HOME_PROCESSED, NOFAIL)
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if test "x$JAVA_HOME_PROCESSED" = x || test ! -d "$JAVA_HOME_PROCESSED"; then
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AC_MSG_NOTICE([Your JAVA_HOME points to a non-existing directory!])
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# Aha, the user has set a JAVA_HOME
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# let us use that as the Boot JDK.
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BOOT_JDK="$JAVA_HOME_PROCESSED"
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AC_MSG_NOTICE([Found potential Boot JDK using JAVA_HOME])
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# Test: Is there a java or javac in the PATH, which is a symlink to the JDK?
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AC_DEFUN([BOOTJDK_CHECK_JAVA_IN_PATH_IS_SYMLINK],
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UTIL_LOOKUP_PROGS(JAVAC_CHECK, javac, , NOFIXPATH)
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UTIL_LOOKUP_PROGS(JAVA_CHECK, java, , NOFIXPATH)
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BINARY="$JAVAC_CHECK"
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if test "x$JAVAC_CHECK" = x; then
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if test "x$BINARY" != x; then
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# So there is a java(c) binary, it might be part of a JDK.
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# Lets find the JDK/JRE directory by following symbolic links.
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# Linux/GNU systems often have links from /usr/bin/java to
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# /etc/alternatives/java to the real JDK binary.
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UTIL_REMOVE_SYMBOLIC_LINKS(BINARY)
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BOOT_JDK=`dirname "$BINARY"`
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BOOT_JDK=`cd "$BOOT_JDK/.."; pwd`
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if test -x "$BOOT_JDK/bin/javac" && test -x "$BOOT_JDK/bin/java"; then
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# Looks like we found ourselves an JDK
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AC_MSG_NOTICE([Found potential Boot JDK using java(c) in PATH])
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# Test: Is there a /usr/libexec/java_home? (Typically on MacOSX)
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# $1: Argument to the java_home binary (optional)
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AC_DEFUN([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME],
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if test -x /usr/libexec/java_home; then
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BOOT_JDK=`/usr/libexec/java_home $1`
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AC_MSG_NOTICE([Found potential Boot JDK using /usr/libexec/java_home $1])
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# Test: On MacOS X, can we find a boot jdk using /usr/libexec/java_home?
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AC_DEFUN([BOOTJDK_CHECK_MACOSX_JAVA_LOCATOR],
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if test "x$OPENJDK_TARGET_OS" = xmacosx; then
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# First check at user selected default
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BOOTJDK_DO_CHECK([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME()])
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# If that did not work out (e.g. too old), try explicit versions instead
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for ver in $DEFAULT_ACCEPTABLE_BOOT_VERSIONS ; do
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BOOTJDK_DO_CHECK([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME([-v $ver])])
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# Look for a jdk in the given path. If there are multiple, try to select the newest.
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# If found, set BOOT_JDK and BOOT_JDK_FOUND.
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# $1 = Path to directory containing jdk installations.
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# $2 = String to append to the found JDK directory to get the proper JDK home
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AC_DEFUN([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY],
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ALL_JDKS_FOUND=`$LS "$BOOT_JDK_PREFIX" 2> /dev/null | $SORT -r`
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if test "x$ALL_JDKS_FOUND" != x; then
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for JDK_TO_TRY in $ALL_JDKS_FOUND ; do
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BOOT_JDK="${BOOT_JDK_PREFIX}/${JDK_TO_TRY}${BOOT_JDK_SUFFIX}"
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if test -d "$BOOT_JDK"; then
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AC_MSG_NOTICE([Found potential Boot JDK using well-known locations (in $BOOT_JDK_PREFIX/$JDK_TO_TRY)])
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# Call BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY, but use the given
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# environmental variable as base for where to look.
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# $1 Name of an environmal variable, assumed to point to the Program Files directory.
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AC_DEFUN([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY],
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if test "x[$]$1" != x; then
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VIRTUAL_DIR="[$]$1/Java"
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UTIL_FIXUP_PATH(VIRTUAL_DIR, NOFAIL)
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if test "x$VIRTUAL_DIR" != x; then
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BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY($VIRTUAL_DIR)
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# Test: Is there a JDK installed in default, well-known locations?
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AC_DEFUN([BOOTJDK_CHECK_WELL_KNOWN_LOCATIONS],
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if test "x$OPENJDK_TARGET_OS" = xwindows; then
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([ProgramW6432])])
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([PROGRAMW6432])])
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([PROGRAMFILES])])
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([ProgramFiles])])
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/cygdrive/c/Program Files/Java])])
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elif test "x$OPENJDK_TARGET_OS" = xmacosx; then
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/Library/Java/JavaVirtualMachines],[/Contents/Home])])
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/System/Library/Java/JavaVirtualMachines],[/Contents/Home])])
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elif test "x$OPENJDK_TARGET_OS" = xlinux; then
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BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/usr/lib/jvm])])
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# Check that a command-line tool in the Boot JDK is correct
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# $1 = name of variable to assign
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AC_DEFUN([BOOTJDK_CHECK_TOOL_IN_BOOTJDK],
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# Use user overridden value if available, otherwise locate tool in the Boot JDK.
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UTIL_REQUIRE_SPECIAL($1,
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AC_MSG_CHECKING([for $2 [[Boot JDK]]])
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if test ! -x [$]$1 && test ! -x [$]$1.exe; then
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AC_MSG_RESULT(not found)
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AC_MSG_NOTICE([Your Boot JDK seems broken. This might be fixed by explicitly setting --with-boot-jdk])
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AC_MSG_ERROR([Could not find $2 in the Boot JDK])
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AC_MSG_RESULT(\[$]BOOT_JDK/bin/$2)
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UTIL_FIXUP_EXECUTABLE($1)
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# Setup CLASSPATH environment variable
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AC_DEFUN([BOOTJDK_SETUP_CLASSPATH],
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AC_ARG_WITH([classpath], [AS_HELP_STRING([--with-classpath],
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[Optional classpath to set as CLASSPATH to all Java invocations @<:@none@:>@])])
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if test "x$CLASSPATH" != x; then
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AC_MSG_WARN([CLASSPATH is set in the environment. This will be ignored. Use --with-classpath instead.])
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if test "x$with_classpath" != x && test "x$with_classpath" != xyes &&
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test "x$with_classpath" != xno ; then
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CLASSPATH="$with_classpath"
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AC_MSG_CHECKING([for classpath to use for all Java invocations])
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AC_MSG_RESULT([$CLASSPATH])
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###############################################################################
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# We need a Boot JDK to bootstrap the build.
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AC_DEFUN_ONCE([BOOTJDK_SETUP_BOOT_JDK],
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AC_ARG_WITH(boot-jdk, [AS_HELP_STRING([--with-boot-jdk],
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[path to Boot JDK (used to bootstrap build) @<:@probed@:>@])])
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AC_ARG_WITH(boot-jdk-jvmargs, [AS_HELP_STRING([--with-boot-jdk-jvmargs],
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[specify additional arguments to be passed to Boot JDK tools @<:@none@:>@])])
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USER_BOOT_JDK_OPTIONS="$with_boot_jdk_jvmargs"
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# We look for the Boot JDK through various means, going from more certain to
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# more of a guess-work. After each test, BOOT_JDK_FOUND is set to "yes" if
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# we detected something (if so, the path to the jdk is in BOOT_JDK). But we
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# must check if this is indeed valid; otherwise we'll continue looking.
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# Test: Is bootjdk explicitly set by command line arguments?
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BOOTJDK_DO_CHECK([BOOTJDK_CHECK_ARGUMENTS])
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if test "x$with_boot_jdk" != x && test "x$BOOT_JDK_FOUND" = xno; then
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# Having specified an argument which is incorrect will produce an instant failure;
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# we should not go on looking
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AC_MSG_ERROR([The path given by --with-boot-jdk does not contain a valid Boot JDK])
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# Test: Is $JAVA_HOME set?
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BOOTJDK_DO_CHECK([BOOTJDK_CHECK_JAVA_HOME])
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# Test: On MacOS X, can we find a boot jdk using /usr/libexec/java_home?
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BOOTJDK_DO_CHECK([BOOTJDK_CHECK_MACOSX_JAVA_LOCATOR])
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# Test: Is there a java or javac in the PATH, which is a symlink to the JDK?
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BOOTJDK_DO_CHECK([BOOTJDK_CHECK_JAVA_IN_PATH_IS_SYMLINK])
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# Test: Is there a JDK installed in default, well-known locations?
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BOOTJDK_DO_CHECK([BOOTJDK_CHECK_WELL_KNOWN_LOCATIONS])
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# If we haven't found anything yet, we've truly lost. Give up.
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if test "x$BOOT_JDK_FOUND" = xno; then
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HELP_MSG_MISSING_DEPENDENCY([openjdk])
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AC_MSG_NOTICE([Could not find a valid Boot JDK. $HELP_MSG])
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AC_MSG_NOTICE([This might be fixed by explicitly setting --with-boot-jdk])
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AC_MSG_ERROR([Cannot continue])
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# Setup tools from the Boot JDK.
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BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVA, java)
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BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVAC, javac)
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BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVADOC, javadoc)
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BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAR, jar)
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# Finally, set some other options...
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# Determine if the boot jdk jar supports the --date option
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if $JAR --help 2>&1 | $GREP -q -e "--date=TIMESTAMP"; then
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BOOT_JDK_JAR_SUPPORTS_DATE=true
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BOOT_JDK_JAR_SUPPORTS_DATE=false
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AC_MSG_CHECKING([if Boot JDK jar supports --date=TIMESTAMP])
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AC_MSG_RESULT([$BOOT_JDK_JAR_SUPPORTS_DATE])
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AC_SUBST(BOOT_JDK_JAR_SUPPORTS_DATE)
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# When compiling code to be executed by the Boot JDK, force compatibility with the
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# oldest supported bootjdk.
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OLDEST_BOOT_JDK=`$ECHO $DEFAULT_ACCEPTABLE_BOOT_VERSIONS \
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| $TR " " "\n" | $SORT -n | $HEAD -n1`
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# -Xlint:-options is added to avoid "warning: [options] system modules path not set in conjunction with -source"
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BOOT_JDK_SOURCETARGET="-source $OLDEST_BOOT_JDK -target $OLDEST_BOOT_JDK -Xlint:-options"
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AC_SUBST(BOOT_JDK_SOURCETARGET)
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# Check if the boot jdk is 32 or 64 bit
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if $JAVA -version 2>&1 | $GREP -q "64-Bit"; then
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AC_MSG_CHECKING([if Boot JDK is 32 or 64 bits])
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AC_MSG_RESULT([$BOOT_JDK_BITS])
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AC_MSG_CHECKING([for local Boot JDK Class Data Sharing (CDS)])
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BOOT_JDK_CDS_ARCHIVE=$CONFIGURESUPPORT_OUTPUTDIR/classes.jsa
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UTIL_ADD_JVM_ARG_IF_OK([-XX:+UnlockDiagnosticVMOptions -XX:-VerifySharedSpaces -XX:SharedArchiveFile=$BOOT_JDK_CDS_ARCHIVE],boot_jdk_cds_args,[$JAVA])
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if test "x$boot_jdk_cds_args" != x; then
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# Try creating a CDS archive
418
$JAVA $boot_jdk_cds_args -Xshare:dump > /dev/null 2>&1
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if test $? -eq 0; then
420
BOOTJDK_USE_LOCAL_CDS=true
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AC_MSG_RESULT([yes, created])
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# Generation failed, don't use CDS.
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BOOTJDK_USE_LOCAL_CDS=false
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AC_MSG_RESULT([no, creation failed])
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BOOTJDK_USE_LOCAL_CDS=false
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AC_MSG_RESULT([no, -XX:SharedArchiveFile not supported])
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BOOTJDK_SETUP_CLASSPATH
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AC_DEFUN_ONCE([BOOTJDK_SETUP_BOOT_JDK_ARGUMENTS],
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##############################################################################
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# Specify jvm options for anything that is run with the Boot JDK.
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# Not all JVM:s accept the same arguments on the command line.
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AC_MSG_CHECKING([flags for boot jdk java command] )
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# Force en-US environment
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UTIL_ADD_JVM_ARG_IF_OK([-Duser.language=en -Duser.country=US],boot_jdk_jvmargs,[$JAVA])
447
if test "x$BOOTJDK_USE_LOCAL_CDS" = xtrue; then
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# Use our own CDS archive
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UTIL_ADD_JVM_ARG_IF_OK([$boot_jdk_cds_args -Xshare:auto],boot_jdk_jvmargs,[$JAVA])
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# Otherwise optimistically use the system-wide one, if one is present
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UTIL_ADD_JVM_ARG_IF_OK([-Xshare:auto],boot_jdk_jvmargs,[$JAVA])
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# Finally append user provided options to allow them to override.
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UTIL_ADD_JVM_ARG_IF_OK([$USER_BOOT_JDK_OPTIONS],boot_jdk_jvmargs,[$JAVA])
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AC_MSG_RESULT([$boot_jdk_jvmargs])
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# For now, general JAVA_FLAGS are the same as the boot jdk jvmargs
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JAVA_FLAGS=$boot_jdk_jvmargs
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AC_MSG_CHECKING([flags for boot jdk java command for big workloads])
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# Starting amount of heap memory.
467
UTIL_ADD_JVM_ARG_IF_OK([-Xms64M],boot_jdk_jvmargs_big,[$JAVA])
468
BOOTCYCLE_JVM_ARGS_BIG=-Xms64M
470
# Maximum amount of heap memory.
471
JVM_HEAP_LIMIT_32="768"
472
# Running a 64 bit JVM allows for and requires a bigger heap
473
JVM_HEAP_LIMIT_64="1600"
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JVM_HEAP_LIMIT_GLOBAL=`expr $MEMORY_SIZE / 2`
475
if test "$JVM_HEAP_LIMIT_GLOBAL" -lt "$JVM_HEAP_LIMIT_32"; then
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JVM_HEAP_LIMIT_32=$JVM_HEAP_LIMIT_GLOBAL
478
if test "$JVM_HEAP_LIMIT_GLOBAL" -lt "$JVM_HEAP_LIMIT_64"; then
479
JVM_HEAP_LIMIT_64=$JVM_HEAP_LIMIT_GLOBAL
481
if test "$JVM_HEAP_LIMIT_GLOBAL" -lt "512"; then
482
JVM_HEAP_LIMIT_32=512
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JVM_HEAP_LIMIT_64=512
486
if test "x$BOOT_JDK_BITS" = "x32"; then
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JVM_MAX_HEAP=$JVM_HEAP_LIMIT_32
489
JVM_MAX_HEAP=$JVM_HEAP_LIMIT_64
491
UTIL_ADD_JVM_ARG_IF_OK([-Xmx${JVM_MAX_HEAP}M],boot_jdk_jvmargs_big,[$JAVA])
493
AC_MSG_RESULT([$boot_jdk_jvmargs_big])
495
JAVA_FLAGS_BIG=$boot_jdk_jvmargs_big
496
AC_SUBST(JAVA_FLAGS_BIG)
498
if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then
499
BOOTCYCLE_MAX_HEAP=$JVM_HEAP_LIMIT_32
501
BOOTCYCLE_MAX_HEAP=$JVM_HEAP_LIMIT_64
503
BOOTCYCLE_JVM_ARGS_BIG="$BOOTCYCLE_JVM_ARGS_BIG -Xmx${BOOTCYCLE_MAX_HEAP}M"
504
AC_MSG_CHECKING([flags for bootcycle boot jdk java command for big workloads])
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AC_MSG_RESULT([$BOOTCYCLE_JVM_ARGS_BIG])
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AC_SUBST(BOOTCYCLE_JVM_ARGS_BIG)
508
AC_MSG_CHECKING([flags for boot jdk java command for small workloads])
510
# Use serial gc for small short lived tools if possible
511
UTIL_ADD_JVM_ARG_IF_OK([-XX:+UseSerialGC],boot_jdk_jvmargs_small,[$JAVA])
512
UTIL_ADD_JVM_ARG_IF_OK([-Xms32M],boot_jdk_jvmargs_small,[$JAVA])
513
UTIL_ADD_JVM_ARG_IF_OK([-Xmx512M],boot_jdk_jvmargs_small,[$JAVA])
514
UTIL_ADD_JVM_ARG_IF_OK([-XX:TieredStopAtLevel=1],boot_jdk_jvmargs_small,[$JAVA])
516
AC_MSG_RESULT([$boot_jdk_jvmargs_small])
518
JAVA_FLAGS_SMALL=$boot_jdk_jvmargs_small
519
AC_SUBST(JAVA_FLAGS_SMALL)
521
# Don't presuppose SerialGC is present in the buildjdk. Also, we cannot test
522
# the buildjdk, but on the other hand we know what it will support.
523
BUILD_JAVA_FLAGS_SMALL="-Xms32M -Xmx512M -XX:TieredStopAtLevel=1"
524
AC_SUBST(BUILD_JAVA_FLAGS_SMALL)
526
JAVA_TOOL_FLAGS_SMALL=""
527
for f in $JAVA_FLAGS_SMALL; do
528
JAVA_TOOL_FLAGS_SMALL="$JAVA_TOOL_FLAGS_SMALL -J$f"
530
AC_SUBST(JAVA_TOOL_FLAGS_SMALL)
533
# BUILD_JDK: the location of the latest JDK that can run
534
# on the host system and supports the target class file version
535
# generated in this JDK build. This variable should only be
536
# used after the launchers are built.
539
# Execute the check given as argument, and verify the result.
540
# If the JDK was previously found, do nothing.
541
# $1 A command line (typically autoconf macro) to execute
542
AC_DEFUN([BOOTJDK_CHECK_BUILD_JDK],
544
if test "x$BUILD_JDK_FOUND" = xno; then
548
# If previous step claimed to have found a JDK, check it to see if it seems to be valid.
549
if test "x$BUILD_JDK_FOUND" = xmaybe; then
550
# Do we have a bin/java?
551
if test ! -x "$BUILD_JDK/bin/java"; then
552
AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/java; ignoring])
554
elif test ! -x "$BUILD_JDK/bin/jlink"; then
555
AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/jlink; ignoring])
557
elif test ! -x "$BUILD_JDK/bin/jmod"; then
558
AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/jmod; ignoring])
560
elif test ! -x "$BUILD_JDK/bin/javac"; then
561
# Do we have a bin/javac?
562
AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/javac; ignoring])
563
AC_MSG_NOTICE([(This might be a JRE instead of an JDK)])
566
# Oh, this is looking good! We probably have found a proper JDK. Is it the correct version?
567
# Additional [] needed to keep m4 from mangling shell constructs.
568
[ BUILD_JDK_VERSION=`"$BUILD_JDK/bin/java" -version 2>&1 | $AWK '/version "[0-9a-zA-Z\._\-]+"/ {print $ 0; exit;}'` ]
570
# Extra M4 quote needed to protect [] in grep expression.
571
[FOUND_CORRECT_VERSION=`echo $BUILD_JDK_VERSION | $EGREP "\"$VERSION_FEATURE([\.+-].*)?\""`]
572
if test "x$FOUND_CORRECT_VERSION" = x; then
573
AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK is incorrect JDK version ($BUILD_JDK_VERSION); ignoring])
574
AC_MSG_NOTICE([(Your Build JDK must be version $VERSION_FEATURE)])
579
UTIL_FIXUP_PATH(BUILD_JDK)
580
AC_MSG_CHECKING([for Build JDK])
581
AC_MSG_RESULT([$BUILD_JDK])
582
AC_MSG_CHECKING([Build JDK version])
583
BUILD_JDK_VERSION=`"$BUILD_JDK/bin/java" -version 2>&1 | $TR '\n\r' ' '`
584
AC_MSG_RESULT([$BUILD_JDK_VERSION])
585
fi # end check jdk version
587
fi # end check build jdk found
591
# By default the BUILD_JDK is the JDK_OUTPUTDIR. If the target architecture
592
# is different than the host system doing the build (e.g. cross-compilation),
593
# a special BUILD_JDK is built as part of the build process. An external
594
# prebuilt BUILD_JDK can also be supplied.
595
AC_DEFUN([BOOTJDK_SETUP_BUILD_JDK],
597
AC_ARG_WITH(build-jdk, [AS_HELP_STRING([--with-build-jdk],
598
[path to JDK of same version as is being built@<:@the newly built JDK@:>@])])
600
CREATE_BUILDJDK=false
601
EXTERNAL_BUILDJDK=false
603
if test "x$with_build_jdk" != "x"; then
604
BOOTJDK_CHECK_BUILD_JDK([
605
if test "x$with_build_jdk" != x; then
606
BUILD_JDK=$with_build_jdk
607
BUILD_JDK_FOUND=maybe
608
AC_MSG_NOTICE([Found potential Build JDK using configure arguments])
610
EXTERNAL_BUILDJDK=true
612
if test "x$COMPILE_TYPE" = "xcross"; then
613
BUILD_JDK="\$(BUILDJDK_OUTPUTDIR)/jdk"
616
AC_MSG_CHECKING([for Build JDK])
617
AC_MSG_RESULT([yes, will build it for the host platform])
619
BUILD_JDK="\$(JDK_OUTPUTDIR)"
621
AC_MSG_CHECKING([for Build JDK])
622
AC_MSG_RESULT([yes, will use output dir])
626
# Since these tools do not yet exist, we cannot use UTIL_FIXUP_EXECUTABLE to
627
# detect the need of fixpath
628
JMOD="$BUILD_JDK/bin/jmod"
629
UTIL_ADD_FIXPATH(JMOD)
630
JLINK="$BUILD_JDK/bin/jlink"
631
UTIL_ADD_FIXPATH(JLINK)
635
if test "x$BUILD_JDK_FOUND" != "xyes"; then
636
AC_MSG_CHECKING([for Build JDK])
638
AC_MSG_ERROR([Could not find a suitable Build JDK])
641
AC_SUBST(CREATE_BUILDJDK)
643
AC_SUBST(EXTERNAL_BUILDJDK)
646
# The docs-reference JDK is used to run javadoc for the docs-reference targets.
647
# If not set, the reference docs will be built using the interim javadoc.
648
AC_DEFUN([BOOTJDK_SETUP_DOCS_REFERENCE_JDK],
650
AC_ARG_WITH(docs-reference-jdk, [AS_HELP_STRING([--with-docs-reference-jdk],
651
[path to JDK to use for building the reference documentation])])
653
AC_MSG_CHECKING([for docs-reference JDK])
654
if test "x$with_docs_reference_jdk" != "x"; then
655
DOCS_REFERENCE_JDK="$with_docs_reference_jdk"
656
AC_MSG_RESULT([$DOCS_REFERENCE_JDK])
657
DOCS_REFERENCE_JAVADOC="$DOCS_REFERENCE_JDK/bin/javadoc"
658
if test ! -x "$DOCS_REFERENCE_JAVADOC"; then
659
AC_MSG_ERROR([docs-reference JDK found at $DOCS_REFERENCE_JDK did not contain bin/javadoc])
661
UTIL_FIXUP_EXECUTABLE(DOCS_REFERENCE_JAVADOC)
663
AC_MSG_RESULT([no, using interim javadoc for the docs-reference targets])
664
# By leaving this empty, Docs.gmk will revert to the default interim javadoc
665
DOCS_REFERENCE_JAVADOC=
668
AC_SUBST(DOCS_REFERENCE_JAVADOC)