1#
2# Copyright (c) 2011, 2019, 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#
17# You should have received a copy of the GNU General Public License version
18# 2 along with this work; if not, write to the Free Software Foundation,
19# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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
26AC_DEFUN([BPERF_CHECK_CORES],
27[
28  AC_MSG_CHECKING([for number of cores])
29  NUM_CORES=1
30  FOUND_CORES=no
31
32  if test -f /proc/cpuinfo; then
33    # Looks like a Linux (or cygwin) system
34    NUM_CORES=`cat /proc/cpuinfo  | grep -c processor`
35    FOUND_CORES=yes
36  elif test -x /usr/sbin/psrinfo; then
37    # Looks like a Solaris system
38    NUM_CORES=`LC_MESSAGES=C /usr/sbin/psrinfo -v | grep -c on-line`
39    FOUND_CORES=yes
40  elif test -x /usr/sbin/sysctl; then
41    # Looks like a MacOSX system
42    NUM_CORES=`/usr/sbin/sysctl -n hw.ncpu`
43    FOUND_CORES=yes
44  elif test -x /sbin/sysctl; then
45    # Looks like a BSD system
46    NUM_CORES=`/sbin/sysctl -n hw.ncpu`
47    FOUND_CORES=yes
48  elif test "x$OPENJDK_BUILD_OS" = xaix ; then
49    NUM_LCPU=`lparstat -m 2> /dev/null | $GREP -o "lcpu=[[0-9]]*" | $CUT -d "=" -f 2`
50    if test -n "$NUM_LCPU"; then
51      NUM_CORES=$NUM_LCPU
52      FOUND_CORES=yes
53    fi
54  elif test -n "$NUMBER_OF_PROCESSORS"; then
55    # On windows, look in the env
56    NUM_CORES=$NUMBER_OF_PROCESSORS
57    FOUND_CORES=yes
58  fi
59
60  if test "x$FOUND_CORES" = xyes; then
61    AC_MSG_RESULT([$NUM_CORES])
62  else
63    AC_MSG_RESULT([could not detect number of cores, defaulting to 1])
64    AC_MSG_WARN([This will disable all parallelism from build!])
65  fi
66])
67
68AC_DEFUN([BPERF_CHECK_MEMORY_SIZE],
69[
70  AC_MSG_CHECKING([for memory size])
71  # Default to 1024 MB
72  MEMORY_SIZE=1024
73  FOUND_MEM=no
74
75  if test -f /proc/meminfo; then
76    # Looks like a Linux (or cygwin) system
77    MEMORY_SIZE=`cat /proc/meminfo | grep MemTotal | awk '{print [$]2}'`
78    MEMORY_SIZE=`expr $MEMORY_SIZE / 1024`
79    FOUND_MEM=yes
80  elif test -x /usr/sbin/prtconf; then
81    # Looks like a Solaris or AIX system
82    MEMORY_SIZE=`/usr/sbin/prtconf 2> /dev/null | grep "^Memory [[Ss]]ize" | awk '{ print [$]3 }'`
83    FOUND_MEM=yes
84  elif test -x /sbin/sysctl; then
85    # Looks like a BSD system
86    MEMORY_SIZE=`/sbin/sysctl -n hw.physmem`
87    MEMORY_SIZE=`expr $MEMORY_SIZE / 1024 / 1024`
88    FOUND_MEM=yes
89    if test "x$OPENJDK_TARGET_OS_ENV" = xbsd.openbsd; then
90      RLIMIT_DATA=`ulimit -d`
91      RLIMIT_DATA=`expr $RLIMIT_DATA / 1024`
92      if test "$MEMORY_SIZE" -gt "$RLIMIT_DATA"; then
93        MEMORY_SIZE=$RLIMIT_DATA
94      fi
95    fi
96  elif test -x /usr/sbin/sysctl; then
97    # Looks like a MacOSX system
98    MEMORY_SIZE=`/usr/sbin/sysctl -n hw.memsize`
99    MEMORY_SIZE=`expr $MEMORY_SIZE / 1024 / 1024`
100    FOUND_MEM=yes
101  elif test "x$OPENJDK_BUILD_OS" = xwindows; then
102    # Windows, but without cygwin
103    MEMORY_SIZE=`wmic computersystem get totalphysicalmemory -value | grep = | cut -d "=" -f 2-`
104    MEMORY_SIZE=`expr $MEMORY_SIZE / 1024 / 1024`
105    FOUND_MEM=yes
106  fi
107
108  if test "x$FOUND_MEM" = xyes; then
109    AC_MSG_RESULT([$MEMORY_SIZE MB])
110  else
111    AC_MSG_RESULT([could not detect memory size, defaulting to $MEMORY_SIZE MB])
112    AC_MSG_WARN([This might seriously impact build performance!])
113  fi
114])
115
116AC_DEFUN_ONCE([BPERF_SETUP_BUILD_CORES],
117[
118  # How many cores do we have on this build system?
119  AC_ARG_WITH(num-cores, [AS_HELP_STRING([--with-num-cores],
120      [number of cores in the build system, e.g. --with-num-cores=8 @<:@probed@:>@])])
121  if test "x$with_num_cores" = x; then
122    # The number of cores were not specified, try to probe them.
123    BPERF_CHECK_CORES
124  else
125    NUM_CORES=$with_num_cores
126  fi
127  AC_SUBST(NUM_CORES)
128])
129
130AC_DEFUN_ONCE([BPERF_SETUP_BUILD_MEMORY],
131[
132  # How much memory do we have on this build system?
133  AC_ARG_WITH(memory-size, [AS_HELP_STRING([--with-memory-size],
134      [memory (in MB) available in the build system, e.g. --with-memory-size=1024 @<:@probed@:>@])])
135  if test "x$with_memory_size" = x; then
136    # The memory size was not specified, try to probe it.
137    BPERF_CHECK_MEMORY_SIZE
138  else
139    MEMORY_SIZE=$with_memory_size
140  fi
141  AC_SUBST(MEMORY_SIZE)
142])
143
144AC_DEFUN_ONCE([BPERF_SETUP_BUILD_JOBS],
145[
146  # Provide a decent default number of parallel jobs for make depending on
147  # number of cores, amount of memory and machine architecture.
148  AC_ARG_WITH(jobs, [AS_HELP_STRING([--with-jobs],
149      [number of parallel jobs to let make run @<:@calculated based on cores and memory@:>@])])
150  if test "x$with_jobs" = x; then
151    # Number of jobs was not specified, calculate.
152    AC_MSG_CHECKING([for appropriate number of jobs to run in parallel])
153    # Approximate memory in GB.
154    memory_gb=`expr $MEMORY_SIZE / 1024`
155    # Pick the lowest of memory in gb and number of cores.
156    if test "$memory_gb" -lt "$NUM_CORES"; then
157      JOBS="$memory_gb"
158    else
159      JOBS="$NUM_CORES"
160    fi
161    if test "$JOBS" -eq "0"; then
162      JOBS=1
163    fi
164    AC_MSG_RESULT([$JOBS])
165  else
166    JOBS=$with_jobs
167  fi
168  AC_SUBST(JOBS)
169])
170
171AC_DEFUN_ONCE([BPERF_SETUP_TEST_JOBS],
172[
173  # The number of test jobs will be chosen automatically if TEST_JOBS is 0
174  AC_ARG_WITH(test-jobs, [AS_HELP_STRING([--with-test-jobs],
175      [number of parallel tests jobs to run @<:@based on build jobs@:>@])])
176  if test "x$with_test_jobs" = x; then
177      TEST_JOBS=0
178  else
179      TEST_JOBS=$with_test_jobs
180  fi
181  AC_SUBST(TEST_JOBS)
182])
183
184AC_DEFUN([BPERF_SETUP_CCACHE],
185[
186  AC_ARG_ENABLE([ccache],
187      [AS_HELP_STRING([--enable-ccache],
188      [enable using ccache to speed up recompilations @<:@disabled@:>@])])
189
190  CCACHE_STATUS=
191  AC_MSG_CHECKING([is ccache enabled])
192  if test "x$enable_ccache" = xyes; then
193    if test "x$TOOLCHAIN_TYPE" = "xgcc" -o "x$TOOLCHAIN_TYPE" = "xclang"; then
194      AC_MSG_RESULT([yes])
195      OLD_PATH="$PATH"
196      if test "x$TOOLCHAIN_PATH" != x; then
197        PATH=$TOOLCHAIN_PATH:$PATH
198      fi
199      BASIC_REQUIRE_PROGS(CCACHE, ccache)
200      PATH="$OLD_PATH"
201      CCACHE_VERSION=[`$CCACHE --version | head -n1 | $SED 's/[A-Za-z ]*//'`]
202      CCACHE_STATUS="Active ($CCACHE_VERSION)"
203    else
204      AC_MSG_RESULT([no])
205      AC_MSG_WARN([ccache is not supported with toolchain type $TOOLCHAIN_TYPE])
206    fi
207  elif test "x$enable_ccache" = xno; then
208    AC_MSG_RESULT([no, explicitly disabled])
209    CCACHE_STATUS="Disabled"
210  elif test "x$enable_ccache" = x; then
211    AC_MSG_RESULT([no])
212  else
213    AC_MSG_RESULT([unknown])
214    AC_MSG_ERROR([--enable-ccache does not accept any parameters])
215  fi
216  AC_SUBST(CCACHE)
217
218  AC_ARG_WITH([ccache-dir],
219      [AS_HELP_STRING([--with-ccache-dir],
220      [where to store ccache files @<:@~/.ccache@:>@])])
221
222  if test "x$with_ccache_dir" != x; then
223    # When using a non home ccache directory, assume the use is to share ccache files
224    # with other users. Thus change the umask.
225    SET_CCACHE_DIR="CCACHE_DIR=$with_ccache_dir CCACHE_UMASK=002"
226    if test "x$CCACHE" = x; then
227      AC_MSG_WARN([--with-ccache-dir has no meaning when ccache is not enabled])
228    fi
229  fi
230
231  if test "x$CCACHE" != x; then
232    BPERF_SETUP_CCACHE_USAGE
233  fi
234])
235
236AC_DEFUN([BPERF_SETUP_CCACHE_USAGE],
237[
238  if test "x$CCACHE" != x; then
239    if test "x$OPENJDK_BUILD_OS" = "xmacosx"; then
240      HAS_BAD_CCACHE=[`$ECHO $CCACHE_VERSION | \
241          $GREP -e '^1\.' -e '^2\.' -e '^3\.0\.' -e '^3\.1\.'`]
242      if test "x$HAS_BAD_CCACHE" != "x"; then
243        AC_MSG_ERROR([On macosx, ccache 3.2 or later is required, found $CCACHE_VERSION])
244      fi
245    fi
246    if test "x$USE_PRECOMPILED_HEADER" = "xtrue"; then
247      HAS_BAD_CCACHE=[`$ECHO $CCACHE_VERSION | \
248          $GREP -e '^1.*' -e '^2.*' -e '^3\.0.*' -e '^3\.1\.[0123]$'`]
249      if test "x$HAS_BAD_CCACHE" != "x"; then
250        AC_MSG_ERROR([Precompiled headers requires ccache 3.1.4 or later, found $CCACHE_VERSION])
251      fi
252      AC_MSG_CHECKING([if C-compiler supports ccache precompiled headers])
253      CCACHE_PRECOMP_FLAG="-fpch-preprocess"
254      PUSHED_FLAGS="$CXXFLAGS"
255      CXXFLAGS="$CCACHE_PRECOMP_FLAG $CXXFLAGS"
256      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [CC_KNOWS_CCACHE_TRICK=yes], [CC_KNOWS_CCACHE_TRICK=no])
257      CXXFLAGS="$PUSHED_FLAGS"
258      if test "x$CC_KNOWS_CCACHE_TRICK" = xyes; then
259        AC_MSG_RESULT([yes])
260        CFLAGS_CCACHE="$CCACHE_PRECOMP_FLAG"
261        AC_SUBST(CFLAGS_CCACHE)
262        CCACHE_SLOPPINESS=pch_defines,time_macros
263      else
264        AC_MSG_RESULT([no])
265        AC_MSG_ERROR([Cannot use ccache with precompiled headers without compiler support for $CCACHE_PRECOMP_FLAG])
266      fi
267    fi
268
269    CCACHE="CCACHE_COMPRESS=1 $SET_CCACHE_DIR \
270        CCACHE_SLOPPINESS=$CCACHE_SLOPPINESS CCACHE_BASEDIR=$TOPDIR $CCACHE"
271
272    if test "x$SET_CCACHE_DIR" != x; then
273      mkdir -p $CCACHE_DIR > /dev/null 2>&1
274      chmod a+rwxs $CCACHE_DIR > /dev/null 2>&1
275    fi
276  fi
277])
278
279################################################################################
280#
281# Runs icecc-create-env once and prints the error if it fails
282#
283# $1: arguments to icecc-create-env
284# $2: log file
285#
286AC_DEFUN([BPERF_RUN_ICECC_CREATE_ENV],
287[
288  ( cd ${CONFIGURESUPPORT_OUTPUTDIR}/icecc \
289      && ${ICECC_CREATE_ENV} $1 > $2 2>&1 )
290  if test "$?" != "0"; then
291    AC_MSG_NOTICE([icecc-create-env output:])
292    cat $2
293    AC_MSG_ERROR([Failed to create icecc compiler environment])
294  fi
295])
296
297################################################################################
298#
299# Optionally enable distributed compilation of native code using icecc/icecream
300#
301AC_DEFUN([BPERF_SETUP_ICECC],
302[
303  AC_ARG_ENABLE([icecc], [AS_HELP_STRING([--enable-icecc],
304      [enable distribted compilation of native code using icecc/icecream @<:@disabled@:>@])])
305
306  if test "x${enable_icecc}" = "xyes"; then
307    BASIC_REQUIRE_PROGS(ICECC_CMD, icecc)
308    old_path="$PATH"
309
310    # Look for icecc-create-env in some known places
311    PATH="$PATH:/usr/lib/icecc:/usr/lib64/icecc"
312    BASIC_REQUIRE_PROGS(ICECC_CREATE_ENV, icecc-create-env)
313    # Use icecc-create-env to create a minimal compilation environment that can
314    # be sent to the other hosts in the icecream cluster.
315    icecc_create_env_log="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/icecc_create_env.log"
316    ${MKDIR} -p ${CONFIGURESUPPORT_OUTPUTDIR}/icecc
317    # Older versions of icecc does not have the --gcc parameter
318    if ${ICECC_CREATE_ENV} | $GREP -q -e --gcc; then
319      icecc_gcc_arg="--gcc"
320    fi
321    if test "x${TOOLCHAIN_TYPE}" = "xgcc"; then
322      BPERF_RUN_ICECC_CREATE_ENV([${icecc_gcc_arg} ${CC} ${CXX}], \
323          ${icecc_create_env_log})
324    elif test "x$TOOLCHAIN_TYPE" = "xclang"; then
325      # For clang, the icecc compilerwrapper is needed. It usually resides next
326      # to icecc-create-env.
327      BASIC_REQUIRE_PROGS(ICECC_WRAPPER, compilerwrapper)
328      BPERF_RUN_ICECC_CREATE_ENV([--clang ${CC} ${ICECC_WRAPPER}], ${icecc_create_env_log})
329    else
330      AC_MSG_ERROR([Can only create icecc compiler packages for toolchain types gcc and clang])
331    fi
332    PATH="$old_path"
333    # The bundle with the compiler gets a name based on checksums. Parse log file
334    # to find it.
335    ICECC_ENV_BUNDLE_BASENAME="`${SED} -n '/^creating/s/creating //p' ${icecc_create_env_log}`"
336    ICECC_ENV_BUNDLE="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/${ICECC_ENV_BUNDLE_BASENAME}"
337    if test ! -f ${ICECC_ENV_BUNDLE}; then
338      AC_MSG_ERROR([icecc-create-env did not produce an environment ${ICECC_ENV_BUNDLE}])
339    fi
340    AC_MSG_CHECKING([for icecc build environment for target compiler])
341    AC_MSG_RESULT([${ICECC_ENV_BUNDLE}])
342    ICECC="ICECC_VERSION=${ICECC_ENV_BUNDLE} ICECC_CC=${CC} ICECC_CXX=${CXX} ${ICECC_CMD}"
343
344    if test "x${COMPILE_TYPE}" = "xcross"; then
345      # If cross compiling, create a separate env package for the build compiler
346      # Assume "gcc" or "cc" is gcc and "clang" is clang. Otherwise bail.
347      icecc_create_env_log_build="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/icecc_create_env_build.log"
348      if test "x${BUILD_CC##*/}" = "xgcc" ||  test "x${BUILD_CC##*/}" = "xcc"; then
349        BPERF_RUN_ICECC_CREATE_ENV([${icecc_gcc_arg} ${BUILD_CC} ${BUILD_CXX}], \
350            ${icecc_create_env_log_build})
351      elif test "x${BUILD_CC##*/}" = "xclang"; then
352        BPERF_RUN_ICECC_CREATE_ENV([--clang ${BUILD_CC} ${ICECC_WRAPPER}], ${icecc_create_env_log_build})
353      else
354        AC_MSG_ERROR([Cannot create icecc compiler package for ${BUILD_CC}])
355      fi
356      ICECC_ENV_BUNDLE_BASENAME="`${SED} -n '/^creating/s/creating //p' ${icecc_create_env_log_build}`"
357      ICECC_ENV_BUNDLE="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/${ICECC_ENV_BUNDLE_BASENAME}"
358      if test ! -f ${ICECC_ENV_BUNDLE}; then
359        AC_MSG_ERROR([icecc-create-env did not produce an environment ${ICECC_ENV_BUNDLE}])
360      fi
361      AC_MSG_CHECKING([for icecc build environment for build compiler])
362      AC_MSG_RESULT([${ICECC_ENV_BUNDLE}])
363      BUILD_ICECC="ICECC_VERSION=${ICECC_ENV_BUNDLE} ICECC_CC=${BUILD_CC} \
364          ICECC_CXX=${BUILD_CXX} ${ICECC_CMD}"
365    else
366      BUILD_ICECC="${ICECC}"
367    fi
368    AC_SUBST(ICECC)
369    AC_SUBST(BUILD_ICECC)
370  fi
371])
372
373AC_DEFUN_ONCE([BPERF_SETUP_PRECOMPILED_HEADERS],
374[
375
376  ###############################################################################
377  #
378  # Can the C/C++ compiler use precompiled headers?
379  #
380  AC_ARG_ENABLE([precompiled-headers], [AS_HELP_STRING([--disable-precompiled-headers],
381      [disable using precompiled headers when compiling C++ @<:@enabled@:>@])],
382      [ENABLE_PRECOMPH=${enable_precompiled_headers}], [ENABLE_PRECOMPH=yes])
383
384  USE_PRECOMPILED_HEADER=true
385  AC_MSG_CHECKING([If precompiled header is enabled])
386  if test "x$ENABLE_PRECOMPH" = xno; then
387    AC_MSG_RESULT([no, forced])
388    USE_PRECOMPILED_HEADER=false
389  elif test "x$ICECC" != "x"; then
390    AC_MSG_RESULT([no, does not work effectively with icecc])
391    USE_PRECOMPILED_HEADER=false
392  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
393    AC_MSG_RESULT([no, does not work with Solaris Studio])
394    USE_PRECOMPILED_HEADER=false
395  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
396    AC_MSG_RESULT([no, does not work with xlc])
397    USE_PRECOMPILED_HEADER=false
398  else
399    AC_MSG_RESULT([yes])
400  fi
401
402  if test "x$ENABLE_PRECOMPH" = xyes; then
403    # Check that the compiler actually supports precomp headers.
404    if test "x$TOOLCHAIN_TYPE" = xgcc; then
405      AC_MSG_CHECKING([that precompiled headers work])
406      echo "int alfa();" > conftest.h
407      $CXX -x c++-header conftest.h -o conftest.hpp.gch 2>&AS_MESSAGE_LOG_FD >&AS_MESSAGE_LOG_FD
408      if test ! -f conftest.hpp.gch; then
409        USE_PRECOMPILED_HEADER=false
410        AC_MSG_RESULT([no])
411      else
412        AC_MSG_RESULT([yes])
413      fi
414      $RM conftest.h conftest.hpp.gch
415    fi
416  fi
417
418  AC_SUBST(USE_PRECOMPILED_HEADER)
419])
420
421
422AC_DEFUN_ONCE([BPERF_SETUP_SMART_JAVAC],
423[
424  AC_ARG_WITH(sjavac-server-java, [AS_HELP_STRING([--with-sjavac-server-java],
425      [use this java binary for running the sjavac background server @<:@Boot JDK java@:>@])])
426
427  if test "x$with_sjavac_server_java" != x; then
428    SJAVAC_SERVER_JAVA="$with_sjavac_server_java"
429    FOUND_VERSION=`$SJAVAC_SERVER_JAVA -version 2>&1 | grep " version \""`
430    if test "x$FOUND_VERSION" = x; then
431      AC_MSG_ERROR([Could not execute server java: $SJAVAC_SERVER_JAVA])
432    fi
433  else
434    SJAVAC_SERVER_JAVA="$JAVA"
435  fi
436  AC_SUBST(SJAVAC_SERVER_JAVA)
437
438  if test "$MEMORY_SIZE" -gt "3000"; then
439    if "$JAVA" -version 2>&1 | $GREP -q "64-Bit"; then
440      JVM_64BIT=true
441    fi
442  fi
443
444  MX_VALUE=`expr $MEMORY_SIZE / 2`
445  if test "$JVM_64BIT" = true; then
446    # Set ms lower than mx since more than one instance of the server might
447    # get launched at the same time before they figure out which instance won.
448    MS_VALUE=512
449    if test "$MX_VALUE" -gt "2048"; then
450      MX_VALUE=2048
451    fi
452  else
453    MS_VALUE=256
454    if test "$MX_VALUE" -gt "1500"; then
455      MX_VALUE=1500
456    fi
457  fi
458  if test "$MX_VALUE" -lt "512"; then
459    MX_VALUE=512
460  fi
461  ADD_JVM_ARG_IF_OK([-Xms${MS_VALUE}M -Xmx${MX_VALUE}M],SJAVAC_SERVER_JAVA_FLAGS,[$SJAVAC_SERVER_JAVA])
462  AC_SUBST(SJAVAC_SERVER_JAVA_FLAGS)
463
464  AC_ARG_ENABLE([sjavac], [AS_HELP_STRING([--enable-sjavac],
465      [use sjavac to do fast incremental compiles @<:@disabled@:>@])],
466      [ENABLE_SJAVAC="${enableval}"], [ENABLE_SJAVAC="no"])
467  if test "x$JVM_ARG_OK" = "xfalse"; then
468    AC_MSG_WARN([Could not set -Xms${MS_VALUE}M -Xmx${MX_VALUE}M, disabling sjavac])
469    ENABLE_SJAVAC="no"
470  fi
471  AC_MSG_CHECKING([whether to use sjavac])
472  AC_MSG_RESULT([$ENABLE_SJAVAC])
473  AC_SUBST(ENABLE_SJAVAC)
474
475  AC_ARG_ENABLE([javac-server], [AS_HELP_STRING([--disable-javac-server],
476      [disable javac server @<:@enabled@:>@])],
477      [ENABLE_JAVAC_SERVER="${enableval}"], [ENABLE_JAVAC_SERVER="yes"])
478  if test "x$JVM_ARG_OK" = "xfalse"; then
479    AC_MSG_WARN([Could not set -Xms${MS_VALUE}M -Xmx${MX_VALUE}M, disabling javac server])
480    ENABLE_JAVAC_SERVER="no"
481  fi
482  AC_MSG_CHECKING([whether to use javac server])
483  AC_MSG_RESULT([$ENABLE_JAVAC_SERVER])
484  AC_SUBST(ENABLE_JAVAC_SERVER)
485
486  if test "x$ENABLE_JAVAC_SERVER" = "xyes" || test "x$ENABLE_SJAVAC" = "xyes"; then
487    # When using a server javac, the small client instances do not need much
488    # resources.
489    JAVA_FLAGS_JAVAC="$JAVA_FLAGS_SMALL"
490  fi
491])
492