1#
2# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
3# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4#
5# This code is free software; you can redistribute it and/or modify it
6# under the terms of the GNU General Public License version 2 only, as
7# published by the Free Software Foundation.  Oracle designates this
8# particular file as subject to the "Classpath" exception as provided
9# by Oracle in the LICENSE file that accompanied this code.
10#
11# This code is distributed in the hope that it will be useful, but WITHOUT
12# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14# version 2 for more details (a copy is included in the LICENSE file that
15# accompanied this code).
16#
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20#
21# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22# or visit www.oracle.com if you need additional information or have any
23# questions.
24#
25
26########################################################################
27# This file handles detection of the Boot JDK. The Boot JDK detection
28# process has been developed as a response to solve a complex real-world
29# problem. Initially, it was simple, but it has grown as platform after
30# platform, idiosyncracy after idiosyncracy has been supported.
31#
32# The basic idea is this:
33# 1) You need an acceptable *) JDK to use as a Boot JDK
34# 2) There are several ways to locate a JDK, that are mostly platform
35#    dependent **)
36# 3) You can have multiple JDKs installed
37# 4) If possible, configure should try to dig out an acceptable JDK
38#    automatically, without having to resort to command-line options
39#
40# *)  acceptable means e.g. JDK7 for building JDK8, a complete JDK (with
41#     javac) and not a JRE, etc.
42#
43# **) On Windows we typically use a well-known path.
44#     On MacOSX we typically use the tool java_home.
45#     On Linux we typically find javac in the $PATH, and then follow a
46#     chain of symlinks that often ends up in a real JDK.
47#
48# This leads to the code where we check in different ways to locate a
49# JDK, and if one is found, check if it is acceptable. If not, we print
50# our reasons for rejecting it (useful when debugging non-working
51# configure situations) and continue checking the next one.
52########################################################################
53
54# Execute the check given as argument, and verify the result
55# If the Boot JDK was previously found, do nothing
56# $1 A command line (typically autoconf macro) to execute
57AC_DEFUN([BOOTJDK_DO_CHECK],
58[
59  if test "x$BOOT_JDK_FOUND" = xno; then
60    # Now execute the test
61    $1
62
63    # If previous step claimed to have found a JDK, check it to see if it seems to be valid.
64    if test "x$BOOT_JDK_FOUND" = xmaybe; then
65      # Do we have a bin/java?
66      if test ! -x "$BOOT_JDK/bin/java" && test ! -x "$BOOT_JDK/bin/java.exe"; then
67        AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK did not contain bin/java; ignoring])
68        BOOT_JDK_FOUND=no
69      else
70        # Do we have a bin/javac?
71        if test ! -x "$BOOT_JDK/bin/javac" && test ! -x "$BOOT_JDK/bin/javac.exe"; then
72          AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK did not contain bin/javac; ignoring])
73          AC_MSG_NOTICE([(This might be an JRE instead of an JDK)])
74          BOOT_JDK_FOUND=no
75        else
76          # Oh, this is looking good! We probably have found a proper JDK. Is it the correct version?
77          java_to_test="$BOOT_JDK/bin/java"
78          UTIL_FIXUP_EXECUTABLE(java_to_test)
79          BOOT_JDK_VERSION_OUTPUT=`$java_to_test $USER_BOOT_JDK_OPTIONS -version 2>&1`
80          # Additional [] needed to keep m4 from mangling shell constructs.
81          [ BOOT_JDK_VERSION=`echo $BOOT_JDK_VERSION_OUTPUT | $AWK '/version "[0-9a-zA-Z\._\-]+"/ {print $ 0; exit;}'` ]
82
83          if [ [[ "$BOOT_JDK_VERSION" =~ "Picked up" ]] ]; then
84            AC_MSG_NOTICE([You have _JAVA_OPTIONS or JAVA_TOOL_OPTIONS set. This can mess up the build. Please use --with-boot-jdk-jvmargs instead.])
85            AC_MSG_NOTICE([Java reports: "$BOOT_JDK_VERSION".])
86            AC_MSG_ERROR([Cannot continue])
87          fi
88          if [ [[ "$BOOT_JDK_VERSION" =~ "Unrecognized option" ]] ]; then
89            AC_MSG_NOTICE([The specified --with-boot-jdk-jvmargs is invalid for the tested java])
90            AC_MSG_NOTICE([Error message: "$BOOT_JDK_VERSION".])
91            AC_MSG_NOTICE([Please fix arguments, or point to an explicit boot JDK which accept these arguments])
92            AC_MSG_ERROR([Cannot continue])
93          fi
94
95          # Extra M4 quote needed to protect [] in grep expression.
96          [FOUND_CORRECT_VERSION=`$ECHO $BOOT_JDK_VERSION \
97              | $EGREP "\"(${DEFAULT_ACCEPTABLE_BOOT_VERSIONS// /|})([\.+-].*)?\""`]
98
99          if test "x$BOOT_JDK_VERSION" = x; then
100            AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is not a working JDK; ignoring])
101            AC_MSG_NOTICE([Output from java -version was: $BOOT_JDK_VERSION_OUTPUT])
102            BOOT_JDK_FOUND=no
103          elif test "x$FOUND_CORRECT_VERSION" = x; then
104            AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is incorrect JDK version ($BOOT_JDK_VERSION); ignoring])
105            AC_MSG_NOTICE([(Your Boot JDK version must be one of: $DEFAULT_ACCEPTABLE_BOOT_VERSIONS)])
106            BOOT_JDK_FOUND=no
107          else
108            # We're done! :-)
109            BOOT_JDK_FOUND=yes
110            UTIL_FIXUP_PATH(BOOT_JDK)
111            AC_MSG_CHECKING([for Boot JDK])
112            AC_MSG_RESULT([$BOOT_JDK])
113            AC_MSG_CHECKING([Boot JDK version])
114            BOOT_JDK_VERSION=`$java_to_test $USER_BOOT_JDK_OPTIONS -version 2>&1 | $TR -d '\r'`
115            # This is not a no-op; it will portably convert newline to space
116            BOOT_JDK_VERSION=`$ECHO $BOOT_JDK_VERSION`
117            AC_MSG_RESULT([$BOOT_JDK_VERSION])
118          fi # end check jdk version
119        fi # end check javac
120      fi # end check java
121    fi # end check boot jdk found
122  fi
123])
124
125# Test: Is bootjdk explicitly set by command line arguments?
126AC_DEFUN([BOOTJDK_CHECK_ARGUMENTS],
127[
128  if test "x$with_boot_jdk" != x; then
129    if test -d "$with_boot_jdk"; then
130      BOOT_JDK=$with_boot_jdk
131      BOOT_JDK_FOUND=maybe
132    elif test -f "$with_boot_jdk"; then
133      case "$with_boot_jdk" in
134        *.tar.gz )
135            BOOT_JDK_SUPPORT_DIR=$CONFIGURESUPPORT_OUTPUTDIR/boot-jdk
136            $RM -rf $BOOT_JDK_SUPPORT_DIR
137            $MKDIR -p $BOOT_JDK_SUPPORT_DIR
138            $GUNZIP -c $with_boot_jdk | $TAR xf - -C $BOOT_JDK_SUPPORT_DIR
139
140            # Try to find javac to determine BOOT_JDK path
141            BOOT_JDK_JAVAC_PATH=`$FIND $BOOT_JDK_SUPPORT_DIR | $GREP "/bin/javac"`
142            if test "x$BOOT_JDK_JAVAC_PATH" != x; then
143              BOOT_JDK_FOUND=maybe
144              BOOT_JDK=$($DIRNAME $($DIRNAME $BOOT_JDK_JAVAC_PATH))
145            else
146              BOOT_JDK_FOUND=no
147            fi
148          ;;
149        * )
150            BOOT_JDK_FOUND=no
151          ;;
152      esac
153    else
154      BOOT_JDK_FOUND=no
155    fi
156    AC_MSG_NOTICE([Found potential Boot JDK using configure arguments])
157  fi
158])
159
160# Test: Is $JAVA_HOME set?
161AC_DEFUN([BOOTJDK_CHECK_JAVA_HOME],
162[
163  if test "x$JAVA_HOME" != x; then
164    JAVA_HOME_PROCESSED="$JAVA_HOME"
165    UTIL_FIXUP_PATH(JAVA_HOME_PROCESSED, NOFAIL)
166    if test "x$JAVA_HOME_PROCESSED" = x || test ! -d "$JAVA_HOME_PROCESSED"; then
167      AC_MSG_NOTICE([Your JAVA_HOME points to a non-existing directory!])
168    else
169      # Aha, the user has set a JAVA_HOME
170      # let us use that as the Boot JDK.
171      BOOT_JDK="$JAVA_HOME_PROCESSED"
172      BOOT_JDK_FOUND=maybe
173      AC_MSG_NOTICE([Found potential Boot JDK using JAVA_HOME])
174    fi
175  fi
176])
177
178# Test: Is there a java or javac in the PATH, which is a symlink to the JDK?
179AC_DEFUN([BOOTJDK_CHECK_JAVA_IN_PATH_IS_SYMLINK],
180[
181  UTIL_LOOKUP_PROGS(JAVAC_CHECK, javac, , NOFIXPATH)
182  UTIL_LOOKUP_PROGS(JAVA_CHECK, java, , NOFIXPATH)
183  BINARY="$JAVAC_CHECK"
184  if test "x$JAVAC_CHECK" = x; then
185    BINARY="$JAVA_CHECK"
186  fi
187  if test "x$BINARY" != x; then
188    # So there is a java(c) binary, it might be part of a JDK.
189    # Lets find the JDK/JRE directory by following symbolic links.
190    # Linux/GNU systems often have links from /usr/bin/java to
191    # /etc/alternatives/java to the real JDK binary.
192    UTIL_REMOVE_SYMBOLIC_LINKS(BINARY)
193    BOOT_JDK=`dirname "$BINARY"`
194    BOOT_JDK=`cd "$BOOT_JDK/.."; pwd`
195    if test -x "$BOOT_JDK/bin/javac" && test -x "$BOOT_JDK/bin/java"; then
196      # Looks like we found ourselves an JDK
197      BOOT_JDK_FOUND=maybe
198      AC_MSG_NOTICE([Found potential Boot JDK using java(c) in PATH])
199    fi
200  fi
201])
202
203# Test: Is there a /usr/libexec/java_home? (Typically on MacOSX)
204# $1: Argument to the java_home binary (optional)
205AC_DEFUN([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME],
206[
207  if test -x /usr/libexec/java_home; then
208    BOOT_JDK=`/usr/libexec/java_home $1`
209    BOOT_JDK_FOUND=maybe
210    AC_MSG_NOTICE([Found potential Boot JDK using /usr/libexec/java_home $1])
211  fi
212])
213
214# Test: On MacOS X, can we find a boot jdk using /usr/libexec/java_home?
215AC_DEFUN([BOOTJDK_CHECK_MACOSX_JAVA_LOCATOR],
216[
217  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
218    # First check at user selected default
219    BOOTJDK_DO_CHECK([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME()])
220    # If that did not work out (e.g. too old), try explicit versions instead
221    for ver in $DEFAULT_ACCEPTABLE_BOOT_VERSIONS ; do
222      BOOTJDK_DO_CHECK([BOOTJDK_CHECK_LIBEXEC_JAVA_HOME([-v $ver])])
223    done
224  fi
225])
226
227# Look for a jdk in the given path. If there are multiple, try to select the newest.
228# If found, set BOOT_JDK and BOOT_JDK_FOUND.
229# $1 = Path to directory containing jdk installations.
230# $2 = String to append to the found JDK directory to get the proper JDK home
231AC_DEFUN([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY],
232[
233  BOOT_JDK_PREFIX="$1"
234  BOOT_JDK_SUFFIX="$2"
235  ALL_JDKS_FOUND=`$LS "$BOOT_JDK_PREFIX" 2> /dev/null | $SORT -r`
236  if test "x$ALL_JDKS_FOUND" != x; then
237    for JDK_TO_TRY in $ALL_JDKS_FOUND ; do
238      BOOTJDK_DO_CHECK([
239        BOOT_JDK="${BOOT_JDK_PREFIX}/${JDK_TO_TRY}${BOOT_JDK_SUFFIX}"
240        if test -d "$BOOT_JDK"; then
241          BOOT_JDK_FOUND=maybe
242          AC_MSG_NOTICE([Found potential Boot JDK using well-known locations (in $BOOT_JDK_PREFIX/$JDK_TO_TRY)])
243        fi
244      ])
245    done
246  fi
247])
248
249# Call BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY, but use the given
250# environmental variable as base for where to look.
251# $1 Name of an environmal variable, assumed to point to the Program Files directory.
252AC_DEFUN([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY],
253[
254  if test "x[$]$1" != x; then
255    VIRTUAL_DIR="[$]$1/Java"
256    UTIL_FIXUP_PATH(VIRTUAL_DIR, NOFAIL)
257    if test "x$VIRTUAL_DIR" != x; then
258      BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY($VIRTUAL_DIR)
259    fi
260  fi
261])
262
263# Test: Is there a JDK installed in default, well-known locations?
264AC_DEFUN([BOOTJDK_CHECK_WELL_KNOWN_LOCATIONS],
265[
266  if test "x$OPENJDK_TARGET_OS" = xwindows; then
267    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([ProgramW6432])])
268    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([PROGRAMW6432])])
269    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([PROGRAMFILES])])
270    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_WINDOWS_VIRTUAL_DIRECTORY([ProgramFiles])])
271    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/cygdrive/c/Program Files/Java])])
272  elif test "x$OPENJDK_TARGET_OS" = xmacosx; then
273    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/Library/Java/JavaVirtualMachines],[/Contents/Home])])
274    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/System/Library/Java/JavaVirtualMachines],[/Contents/Home])])
275  elif test "x$OPENJDK_TARGET_OS" = xlinux; then
276    BOOTJDK_DO_CHECK([BOOTJDK_FIND_BEST_JDK_IN_DIRECTORY([/usr/lib/jvm])])
277  fi
278])
279
280# Check that a command-line tool in the Boot JDK is correct
281# $1 = name of variable to assign
282# $2 = name of binary
283AC_DEFUN([BOOTJDK_CHECK_TOOL_IN_BOOTJDK],
284[
285  # Use user overridden value if available, otherwise locate tool in the Boot JDK.
286  UTIL_REQUIRE_SPECIAL($1,
287    [
288      AC_MSG_CHECKING([for $2 [[Boot JDK]]])
289      $1=$BOOT_JDK/bin/$2
290      if test ! -x [$]$1 && test ! -x [$]$1.exe; then
291        AC_MSG_RESULT(not found)
292        AC_MSG_NOTICE([Your Boot JDK seems broken. This might be fixed by explicitly setting --with-boot-jdk])
293        AC_MSG_ERROR([Could not find $2 in the Boot JDK])
294      fi
295      AC_MSG_RESULT(\[$]BOOT_JDK/bin/$2)
296      UTIL_FIXUP_EXECUTABLE($1)
297      AC_SUBST($1)
298    ])
299])
300
301###############################################################################
302#
303# We need a Boot JDK to bootstrap the build.
304#
305
306AC_DEFUN_ONCE([BOOTJDK_SETUP_BOOT_JDK],
307[
308  BOOT_JDK_FOUND=no
309  AC_ARG_WITH(boot-jdk, [AS_HELP_STRING([--with-boot-jdk],
310      [path to Boot JDK (used to bootstrap build) @<:@probed@:>@])])
311
312  AC_ARG_WITH(boot-jdk-jvmargs, [AS_HELP_STRING([--with-boot-jdk-jvmargs],
313  [specify additional arguments to be passed to Boot JDK tools @<:@none@:>@])])
314
315  USER_BOOT_JDK_OPTIONS="$with_boot_jdk_jvmargs"
316
317  # We look for the Boot JDK through various means, going from more certain to
318  # more of a guess-work. After each test, BOOT_JDK_FOUND is set to "yes" if
319  # we detected something (if so, the path to the jdk is in BOOT_JDK). But we
320  # must check if this is indeed valid; otherwise we'll continue looking.
321
322  # Test: Is bootjdk explicitly set by command line arguments?
323  BOOTJDK_DO_CHECK([BOOTJDK_CHECK_ARGUMENTS])
324  if test "x$with_boot_jdk" != x && test "x$BOOT_JDK_FOUND" = xno; then
325    # Having specified an argument which is incorrect will produce an instant failure;
326    # we should not go on looking
327    AC_MSG_ERROR([The path given by --with-boot-jdk does not contain a valid Boot JDK])
328  fi
329
330  # Test: Is $JAVA_HOME set?
331  BOOTJDK_DO_CHECK([BOOTJDK_CHECK_JAVA_HOME])
332
333  # Test: On MacOS X, can we find a boot jdk using /usr/libexec/java_home?
334  BOOTJDK_DO_CHECK([BOOTJDK_CHECK_MACOSX_JAVA_LOCATOR])
335
336  # Test: Is there a java or javac in the PATH, which is a symlink to the JDK?
337  BOOTJDK_DO_CHECK([BOOTJDK_CHECK_JAVA_IN_PATH_IS_SYMLINK])
338
339  # Test: Is there a JDK installed in default, well-known locations?
340  BOOTJDK_DO_CHECK([BOOTJDK_CHECK_WELL_KNOWN_LOCATIONS])
341
342  # If we haven't found anything yet, we've truly lost. Give up.
343  if test "x$BOOT_JDK_FOUND" = xno; then
344    HELP_MSG_MISSING_DEPENDENCY([openjdk])
345    AC_MSG_NOTICE([Could not find a valid Boot JDK. $HELP_MSG])
346    AC_MSG_NOTICE([This might be fixed by explicitly setting --with-boot-jdk])
347    AC_MSG_ERROR([Cannot continue])
348  fi
349
350  AC_SUBST(BOOT_JDK)
351
352  # Setup tools from the Boot JDK.
353  BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVA, java)
354  BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVAC, javac)
355  BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAVADOC, javadoc)
356  BOOTJDK_CHECK_TOOL_IN_BOOTJDK(JAR, jar)
357
358  # Finally, set some other options...
359
360  # When compiling code to be executed by the Boot JDK, force compatibility with the
361  # oldest supported bootjdk.
362  OLDEST_BOOT_JDK=`$ECHO $DEFAULT_ACCEPTABLE_BOOT_VERSIONS \
363      | $TR " " "\n" | $SORT -n | $HEAD -n1`
364  # -Xlint:-options is added to avoid "warning: [options] system modules path not set in conjunction with -source"
365  BOOT_JDK_SOURCETARGET="-source $OLDEST_BOOT_JDK -target $OLDEST_BOOT_JDK -Xlint:-options"
366  AC_SUBST(BOOT_JDK_SOURCETARGET)
367
368  # Check if the boot jdk is 32 or 64 bit
369  if $JAVA -version 2>&1 | $GREP -q "64-Bit"; then
370    BOOT_JDK_BITS="64"
371  else
372    BOOT_JDK_BITS="32"
373  fi
374  AC_MSG_CHECKING([if Boot JDK is 32 or 64 bits])
375  AC_MSG_RESULT([$BOOT_JDK_BITS])
376
377  # Try to enable CDS
378  AC_MSG_CHECKING([for local Boot JDK Class Data Sharing (CDS)])
379  BOOT_JDK_CDS_ARCHIVE=$CONFIGURESUPPORT_OUTPUTDIR/classes.jsa
380  UTIL_ADD_JVM_ARG_IF_OK([-XX:+UnlockDiagnosticVMOptions -XX:-VerifySharedSpaces -XX:SharedArchiveFile=$BOOT_JDK_CDS_ARCHIVE],boot_jdk_cds_args,[$JAVA])
381
382  if test "x$boot_jdk_cds_args" != x; then
383    # Try creating a CDS archive
384    $JAVA $boot_jdk_cds_args -Xshare:dump > /dev/null 2>&1
385    if test $? -eq 0; then
386      BOOTJDK_USE_LOCAL_CDS=true
387      AC_MSG_RESULT([yes, created])
388    else
389      # Generation failed, don't use CDS.
390      BOOTJDK_USE_LOCAL_CDS=false
391      AC_MSG_RESULT([no, creation failed])
392    fi
393  else
394    BOOTJDK_USE_LOCAL_CDS=false
395    AC_MSG_RESULT([no, -XX:SharedArchiveFile not supported])
396  fi
397])
398
399AC_DEFUN_ONCE([BOOTJDK_SETUP_BOOT_JDK_ARGUMENTS],
400[
401  ##############################################################################
402  #
403  # Specify jvm options for anything that is run with the Boot JDK.
404  # Not all JVM:s accept the same arguments on the command line.
405  #
406  AC_MSG_CHECKING([flags for boot jdk java command] )
407
408  # Force en-US environment
409  UTIL_ADD_JVM_ARG_IF_OK([-Duser.language=en -Duser.country=US],boot_jdk_jvmargs,[$JAVA])
410
411  if test "x$BOOTJDK_USE_LOCAL_CDS" = xtrue; then
412    # Use our own CDS archive
413    UTIL_ADD_JVM_ARG_IF_OK([$boot_jdk_cds_args -Xshare:auto],boot_jdk_jvmargs,[$JAVA])
414  else
415    # Otherwise optimistically use the system-wide one, if one is present
416    UTIL_ADD_JVM_ARG_IF_OK([-Xshare:auto],boot_jdk_jvmargs,[$JAVA])
417  fi
418
419  # Finally append user provided options to allow them to override.
420  UTIL_ADD_JVM_ARG_IF_OK([$USER_BOOT_JDK_OPTIONS],boot_jdk_jvmargs,[$JAVA])
421
422  AC_MSG_RESULT([$boot_jdk_jvmargs])
423
424  # For now, general JAVA_FLAGS are the same as the boot jdk jvmargs
425  JAVA_FLAGS=$boot_jdk_jvmargs
426  AC_SUBST(JAVA_FLAGS)
427
428  AC_MSG_CHECKING([flags for boot jdk java command for big workloads])
429
430  # Starting amount of heap memory.
431  UTIL_ADD_JVM_ARG_IF_OK([-Xms64M],boot_jdk_jvmargs_big,[$JAVA])
432  BOOTCYCLE_JVM_ARGS_BIG=-Xms64M
433
434  # Maximum amount of heap memory.
435  JVM_HEAP_LIMIT_32="768"
436  # Running a 64 bit JVM allows for and requires a bigger heap
437  JVM_HEAP_LIMIT_64="1600"
438  JVM_HEAP_LIMIT_GLOBAL=`expr $MEMORY_SIZE / 2`
439  if test "$JVM_HEAP_LIMIT_GLOBAL" -lt "$JVM_HEAP_LIMIT_32"; then
440    JVM_HEAP_LIMIT_32=$JVM_HEAP_LIMIT_GLOBAL
441  fi
442  if test "$JVM_HEAP_LIMIT_GLOBAL" -lt "$JVM_HEAP_LIMIT_64"; then
443    JVM_HEAP_LIMIT_64=$JVM_HEAP_LIMIT_GLOBAL
444  fi
445  if test "$JVM_HEAP_LIMIT_GLOBAL" -lt "512"; then
446    JVM_HEAP_LIMIT_32=512
447    JVM_HEAP_LIMIT_64=512
448  fi
449
450  if test "x$BOOT_JDK_BITS" = "x32"; then
451    JVM_MAX_HEAP=$JVM_HEAP_LIMIT_32
452  else
453    JVM_MAX_HEAP=$JVM_HEAP_LIMIT_64
454  fi
455  UTIL_ADD_JVM_ARG_IF_OK([-Xmx${JVM_MAX_HEAP}M],boot_jdk_jvmargs_big,[$JAVA])
456
457  AC_MSG_RESULT([$boot_jdk_jvmargs_big])
458
459  JAVA_FLAGS_BIG=$boot_jdk_jvmargs_big
460  AC_SUBST(JAVA_FLAGS_BIG)
461
462  if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then
463    BOOTCYCLE_MAX_HEAP=$JVM_HEAP_LIMIT_32
464  else
465    BOOTCYCLE_MAX_HEAP=$JVM_HEAP_LIMIT_64
466  fi
467  BOOTCYCLE_JVM_ARGS_BIG="$BOOTCYCLE_JVM_ARGS_BIG -Xmx${BOOTCYCLE_MAX_HEAP}M"
468  AC_MSG_CHECKING([flags for bootcycle boot jdk java command for big workloads])
469  AC_MSG_RESULT([$BOOTCYCLE_JVM_ARGS_BIG])
470  AC_SUBST(BOOTCYCLE_JVM_ARGS_BIG)
471
472  AC_MSG_CHECKING([flags for boot jdk java command for small workloads])
473
474  # Use serial gc for small short lived tools if possible
475  UTIL_ADD_JVM_ARG_IF_OK([-XX:+UseSerialGC],boot_jdk_jvmargs_small,[$JAVA])
476  UTIL_ADD_JVM_ARG_IF_OK([-Xms32M],boot_jdk_jvmargs_small,[$JAVA])
477  UTIL_ADD_JVM_ARG_IF_OK([-Xmx512M],boot_jdk_jvmargs_small,[$JAVA])
478  UTIL_ADD_JVM_ARG_IF_OK([-XX:TieredStopAtLevel=1],boot_jdk_jvmargs_small,[$JAVA])
479
480  AC_MSG_RESULT([$boot_jdk_jvmargs_small])
481
482  JAVA_FLAGS_SMALL=$boot_jdk_jvmargs_small
483  AC_SUBST(JAVA_FLAGS_SMALL)
484
485  # Don't presuppose SerialGC is present in the buildjdk. Also, we cannot test
486  # the buildjdk, but on the other hand we know what it will support.
487  BUILDJDK_JAVA_FLAGS_SMALL="-Xms32M -Xmx512M -XX:TieredStopAtLevel=1"
488  AC_SUBST(BUILDJDK_JAVA_FLAGS_SMALL)
489
490  JAVA_TOOL_FLAGS_SMALL=""
491  for f in $JAVA_FLAGS_SMALL; do
492    JAVA_TOOL_FLAGS_SMALL="$JAVA_TOOL_FLAGS_SMALL -J$f"
493  done
494  AC_SUBST(JAVA_TOOL_FLAGS_SMALL)
495])
496
497# BUILD_JDK: the location of the latest JDK that can run
498#   on the host system and supports the target class file version
499#   generated in this JDK build.  This variable should only be
500#   used after the launchers are built.
501#
502
503# Execute the check given as argument, and verify the result.
504# If the JDK was previously found, do nothing.
505# $1 A command line (typically autoconf macro) to execute
506AC_DEFUN([BOOTJDK_CHECK_BUILD_JDK],
507[
508  if test "x$BUILD_JDK_FOUND" = xno; then
509    # Execute the test
510    $1
511
512    # If previous step claimed to have found a JDK, check it to see if it seems to be valid.
513    if test "x$BUILD_JDK_FOUND" = xmaybe; then
514      # Do we have a bin/java?
515      if test ! -x "$BUILD_JDK/bin/java"; then
516        AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/java; ignoring])
517        BUILD_JDK_FOUND=no
518      elif test ! -x "$BUILD_JDK/bin/jlink"; then
519        AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/jlink; ignoring])
520        BUILD_JDK_FOUND=no
521      elif test ! -x "$BUILD_JDK/bin/jmod"; then
522        AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/jmod; ignoring])
523        BUILD_JDK_FOUND=no
524      elif test ! -x "$BUILD_JDK/bin/javac"; then
525        # Do we have a bin/javac?
526        AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK did not contain bin/javac; ignoring])
527        AC_MSG_NOTICE([(This might be a JRE instead of an JDK)])
528        BUILD_JDK_FOUND=no
529      else
530        # Oh, this is looking good! We probably have found a proper JDK. Is it the correct version?
531        # Additional [] needed to keep m4 from mangling shell constructs.
532        [ BUILD_JDK_VERSION=`"$BUILD_JDK/bin/java" -version 2>&1 | $AWK '/version "[0-9a-zA-Z\._\-]+"/ {print $ 0; exit;}'` ]
533
534        # Extra M4 quote needed to protect [] in grep expression.
535        [FOUND_CORRECT_VERSION=`echo $BUILD_JDK_VERSION | $EGREP "\"$VERSION_FEATURE([\.+-].*)?\""`]
536        if test "x$FOUND_CORRECT_VERSION" = x; then
537          AC_MSG_NOTICE([Potential Build JDK found at $BUILD_JDK is incorrect JDK version ($BUILD_JDK_VERSION); ignoring])
538          AC_MSG_NOTICE([(Your Build JDK must be version $VERSION_FEATURE)])
539          BUILD_JDK_FOUND=no
540        else
541          # We're done!
542          BUILD_JDK_FOUND=yes
543          UTIL_FIXUP_PATH(BUILD_JDK)
544          AC_MSG_CHECKING([for Build JDK])
545          AC_MSG_RESULT([$BUILD_JDK])
546          AC_MSG_CHECKING([Build JDK version])
547          BUILD_JDK_VERSION=`"$BUILD_JDK/bin/java" -version 2>&1 | $TR '\n\r' '  '`
548          AC_MSG_RESULT([$BUILD_JDK_VERSION])
549        fi # end check jdk version
550      fi # end check java
551    fi # end check build jdk found
552  fi
553])
554
555# By default the BUILD_JDK is the JDK_OUTPUTDIR.  If the target architecture
556# is different than the host system doing the build (e.g. cross-compilation),
557# a special BUILD_JDK is built as part of the build process.  An external
558# prebuilt BUILD_JDK can also be supplied.
559AC_DEFUN([BOOTJDK_SETUP_BUILD_JDK],
560[
561  AC_ARG_WITH(build-jdk, [AS_HELP_STRING([--with-build-jdk],
562      [path to JDK of same version as is being built@<:@the newly built JDK@:>@])])
563
564  CREATE_BUILDJDK=false
565  EXTERNAL_BUILDJDK=false
566  BUILD_JDK_FOUND="no"
567  if test "x$with_build_jdk" != "x"; then
568    BOOTJDK_CHECK_BUILD_JDK([
569       if test "x$with_build_jdk" != x; then
570         BUILD_JDK=$with_build_jdk
571         BUILD_JDK_FOUND=maybe
572         AC_MSG_NOTICE([Found potential Build JDK using configure arguments])
573       fi])
574    EXTERNAL_BUILDJDK=true
575  else
576    if test "x$COMPILE_TYPE" = "xcross"; then
577      BUILD_JDK="\$(BUILDJDK_OUTPUTDIR)/jdk"
578      BUILD_JDK_FOUND=yes
579      CREATE_BUILDJDK=true
580      AC_MSG_CHECKING([for Build JDK])
581      AC_MSG_RESULT([yes, will build it for the host platform])
582    else
583      BUILD_JDK="\$(JDK_OUTPUTDIR)"
584      BUILD_JDK_FOUND=yes
585      AC_MSG_CHECKING([for Build JDK])
586      AC_MSG_RESULT([yes, will use output dir])
587    fi
588  fi
589
590  # Since these tools do not yet exist, we cannot use UTIL_FIXUP_EXECUTABLE to
591  # detect the need of fixpath
592  JMOD="$BUILD_JDK/bin/jmod"
593  UTIL_ADD_FIXPATH(JMOD)
594  JLINK="$BUILD_JDK/bin/jlink"
595  UTIL_ADD_FIXPATH(JLINK)
596  AC_SUBST(JMOD)
597  AC_SUBST(JLINK)
598
599  if test "x$BUILD_JDK_FOUND" != "xyes"; then
600    AC_MSG_CHECKING([for Build JDK])
601    AC_MSG_RESULT([no])
602    AC_MSG_ERROR([Could not find a suitable Build JDK])
603  fi
604
605  AC_SUBST(CREATE_BUILDJDK)
606  AC_SUBST(BUILD_JDK)
607  AC_SUBST(EXTERNAL_BUILDJDK)
608])
609
610# The docs-reference JDK is used to run javadoc for the docs-reference targets.
611# If not set, the reference docs will be built using the interim javadoc.
612AC_DEFUN([BOOTJDK_SETUP_DOCS_REFERENCE_JDK],
613[
614  AC_ARG_WITH(docs-reference-jdk, [AS_HELP_STRING([--with-docs-reference-jdk],
615      [path to JDK to use for building the reference documentation])])
616
617  AC_MSG_CHECKING([for docs-reference JDK])
618  if test "x$with_docs_reference_jdk" != "x"; then
619    DOCS_REFERENCE_JDK="$with_docs_reference_jdk"
620    AC_MSG_RESULT([$DOCS_REFERENCE_JDK])
621    DOCS_REFERENCE_JAVADOC="$DOCS_REFERENCE_JDK/bin/javadoc"
622    if test ! -x "$DOCS_REFERENCE_JAVADOC"; then
623      AC_MSG_ERROR([docs-reference JDK found at $DOCS_REFERENCE_JDK did not contain bin/javadoc])
624    fi
625    UTIL_FIXUP_EXECUTABLE(DOCS_REFERENCE_JAVADOC)
626  else
627    AC_MSG_RESULT([no, using interim javadoc for the docs-reference targets])
628    # By leaving this empty, Docs.gmk will revert to the default interim javadoc
629    DOCS_REFERENCE_JAVADOC=
630  fi
631
632  AC_SUBST(DOCS_REFERENCE_JAVADOC)
633])
634