1 #
   2 # Copyright (c) 2011, 2015, 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 
  26 AC_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/system_profiler; then
  41     # Looks like a MacOSX system
  42     NUM_CORES=`/usr/sbin/system_profiler -detailLevel full SPHardwareDataType | grep 'Cores' | awk  '{print [$]5}'`
  43     FOUND_CORES=yes
  44   elif test "x$OPENJDK_BUILD_OS" = xaix ; then
  45     NUM_CORES=`/usr/sbin/prtconf | grep "^Number Of Processors" | awk '{ print [$]4 }'`
  46     FOUND_CORES=yes
  47   elif test -n "$NUMBER_OF_PROCESSORS"; then
  48     # On windows, look in the env
  49     NUM_CORES=$NUMBER_OF_PROCESSORS
  50     FOUND_CORES=yes
  51   fi
  52 
  53   if test "x$FOUND_CORES" = xyes; then
  54     AC_MSG_RESULT([$NUM_CORES])
  55   else
  56     AC_MSG_RESULT([could not detect number of cores, defaulting to 1])
  57     AC_MSG_WARN([This will disable all parallelism from build!])
  58   fi
  59 ])
  60 
  61 AC_DEFUN([BPERF_CHECK_MEMORY_SIZE],
  62 [
  63   AC_MSG_CHECKING([for memory size])
  64   # Default to 1024 MB
  65   MEMORY_SIZE=1024
  66   FOUND_MEM=no
  67 
  68   if test -f /proc/meminfo; then
  69     # Looks like a Linux (or cygwin) system
  70     MEMORY_SIZE=`cat /proc/meminfo | grep MemTotal | awk '{print [$]2}'`
  71     MEMORY_SIZE=`expr $MEMORY_SIZE / 1024`
  72     FOUND_MEM=yes
  73   elif test -x /usr/sbin/prtconf; then
  74     # Looks like a Solaris or AIX system
  75     MEMORY_SIZE=`/usr/sbin/prtconf | grep "^Memory [[Ss]]ize" | awk '{ print [$]3 }'`
  76     FOUND_MEM=yes
  77   elif test -x /usr/sbin/system_profiler; then
  78     # Looks like a MacOSX system
  79     MEMORY_SIZE=`/usr/sbin/system_profiler -detailLevel full SPHardwareDataType | grep 'Memory' | awk  '{print [$]2}'`
  80     MEMORY_SIZE=`expr $MEMORY_SIZE \* 1024`
  81     FOUND_MEM=yes
  82   elif test "x$OPENJDK_BUILD_OS" = xwindows; then
  83     # Windows, but without cygwin
  84     MEMORY_SIZE=`wmic computersystem get totalphysicalmemory -value | grep = | cut -d "=" -f 2-`
  85     MEMORY_SIZE=`expr $MEMORY_SIZE / 1024 / 1024`
  86     FOUND_MEM=yes
  87   fi
  88 
  89   if test "x$FOUND_MEM" = xyes; then
  90     AC_MSG_RESULT([$MEMORY_SIZE MB])
  91   else
  92     AC_MSG_RESULT([could not detect memory size, defaulting to $MEMORY_SIZE MB])
  93     AC_MSG_WARN([This might seriously impact build performance!])
  94   fi
  95 ])
  96 
  97 AC_DEFUN_ONCE([BPERF_SETUP_BUILD_CORES],
  98 [
  99   # How many cores do we have on this build system?
 100   AC_ARG_WITH(num-cores, [AS_HELP_STRING([--with-num-cores],
 101       [number of cores in the build system, e.g. --with-num-cores=8 @<:@probed@:>@])])
 102   if test "x$with_num_cores" = x; then
 103     # The number of cores were not specified, try to probe them.
 104     BPERF_CHECK_CORES
 105   else
 106     NUM_CORES=$with_num_cores
 107   fi
 108   AC_SUBST(NUM_CORES)
 109 ])
 110 
 111 AC_DEFUN_ONCE([BPERF_SETUP_BUILD_MEMORY],
 112 [
 113   # How much memory do we have on this build system?
 114   AC_ARG_WITH(memory-size, [AS_HELP_STRING([--with-memory-size],
 115       [memory (in MB) available in the build system, e.g. --with-memory-size=1024 @<:@probed@:>@])])
 116   if test "x$with_memory_size" = x; then
 117     # The memory size was not specified, try to probe it.
 118     BPERF_CHECK_MEMORY_SIZE
 119   else
 120     MEMORY_SIZE=$with_memory_size
 121   fi
 122   AC_SUBST(MEMORY_SIZE)
 123 ])
 124 
 125 AC_DEFUN_ONCE([BPERF_SETUP_BUILD_JOBS],
 126 [
 127   # Provide a decent default number of parallel jobs for make depending on
 128   # number of cores, amount of memory and machine architecture.
 129   AC_ARG_WITH(jobs, [AS_HELP_STRING([--with-jobs],
 130       [number of parallel jobs to let make run @<:@calculated based on cores and memory@:>@])])
 131   if test "x$with_jobs" = x; then
 132     # Number of jobs was not specified, calculate.
 133     AC_MSG_CHECKING([for appropriate number of jobs to run in parallel])
 134     # Approximate memory in GB.
 135     memory_gb=`expr $MEMORY_SIZE / 1024`
 136     # Pick the lowest of memory in gb and number of cores.
 137     if test "$memory_gb" -lt "$NUM_CORES"; then
 138       JOBS="$memory_gb"
 139     else
 140       JOBS="$NUM_CORES"
 141     fi
 142     if test "$JOBS" -eq "0"; then
 143       JOBS=1
 144     fi
 145     AC_MSG_RESULT([$JOBS])
 146   else
 147     JOBS=$with_jobs
 148   fi
 149   AC_SUBST(JOBS)
 150 ])
 151 
 152 AC_DEFUN_ONCE([BPERF_SETUP_TEST_JOBS],
 153 [
 154   # The number of test jobs will be chosen automatically if TEST_JOBS is 0
 155   AC_ARG_WITH(test-jobs, [AS_HELP_STRING([--with-test-jobs],
 156       [number of parallel tests jobs to run @<:@based on build jobs@:>@])])
 157   if test "x$with_test_jobs" = x; then
 158       TEST_JOBS=0
 159   else
 160       TEST_JOBS=$with_test_jobs
 161   fi
 162   AC_SUBST(TEST_JOBS)
 163 ])
 164 
 165 AC_DEFUN([BPERF_SETUP_CCACHE],
 166 [
 167   AC_ARG_ENABLE([ccache],
 168       [AS_HELP_STRING([--enable-ccache],
 169       [enable using ccache to speed up recompilations @<:@disabled@:>@])])
 170 
 171   CCACHE=
 172   CCACHE_STATUS=
 173   AC_MSG_CHECKING([is ccache enabled])
 174   if test "x$enable_ccache" = xyes; then
 175     if test "x$TOOLCHAIN_TYPE" = "xgcc" -o "x$TOOLCHAIN_TYPE" = "xclang"; then
 176       AC_MSG_RESULT([yes])
 177       OLD_PATH="$PATH"
 178       if test "x$TOOLCHAIN_PATH" != x; then
 179         PATH=$TOOLCHAIN_PATH:$PATH
 180       fi
 181       BASIC_REQUIRE_PROGS(CCACHE, ccache)
 182       PATH="$OLD_PATH"
 183       CCACHE_VERSION=[`$CCACHE --version | head -n1 | $SED 's/[A-Za-z ]*//'`]
 184       CCACHE_STATUS="Active ($CCACHE_VERSION)"
 185     else
 186       AC_MSG_RESULT([no])
 187       AC_MSG_WARN([ccache is not supported with toolchain type $TOOLCHAIN_TYPE])
 188     fi
 189   elif test "x$enable_ccache" = xno; then
 190     AC_MSG_RESULT([no, explicitly disabled])
 191     CCACHE_STATUS="Disabled"
 192   elif test "x$enable_ccache" = x; then
 193     AC_MSG_RESULT([no])
 194   else
 195     AC_MSG_RESULT([unknown])
 196     AC_MSG_ERROR([--enable-ccache does not accept any parameters])
 197   fi
 198   AC_SUBST(CCACHE)
 199 
 200   AC_ARG_WITH([ccache-dir],
 201       [AS_HELP_STRING([--with-ccache-dir],
 202       [where to store ccache files @<:@~/.ccache@:>@])])
 203 
 204   if test "x$with_ccache_dir" != x; then
 205     # When using a non home ccache directory, assume the use is to share ccache files
 206     # with other users. Thus change the umask.
 207     SET_CCACHE_DIR="CCACHE_DIR=$with_ccache_dir CCACHE_UMASK=002"
 208     if test "x$CCACHE" = x; then
 209       AC_MSG_WARN([--with-ccache-dir has no meaning when ccache is not enabled])
 210     fi
 211   fi
 212 
 213   if test "x$CCACHE" != x; then
 214     BPERF_SETUP_CCACHE_USAGE
 215   fi
 216 ])
 217 
 218 AC_DEFUN([BPERF_SETUP_CCACHE_USAGE],
 219 [
 220   if test "x$CCACHE" != x; then
 221     if test "x$USE_PRECOMPILED_HEADER" = "x1"; then
 222       HAS_BAD_CCACHE=[`$ECHO $CCACHE_VERSION | \
 223           $GREP -e '^1.*' -e '^2.*' -e '^3\.0.*' -e '^3\.1\.[0123]$'`]
 224       if test "x$HAS_BAD_CCACHE" != "x"; then
 225         AC_MSG_ERROR([Precompiled headers requires ccache 3.1.4 or later, found $CCACHE_VERSION])
 226       fi
 227       AC_MSG_CHECKING([if C-compiler supports ccache precompiled headers])
 228       CCACHE_PRECOMP_FLAG="-fpch-preprocess"
 229       PUSHED_FLAGS="$CXXFLAGS"
 230       CXXFLAGS="$CCACHE_PRECOMP_FLAG $CXXFLAGS"
 231       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [CC_KNOWS_CCACHE_TRICK=yes], [CC_KNOWS_CCACHE_TRICK=no])
 232       CXXFLAGS="$PUSHED_FLAGS"
 233       if test "x$CC_KNOWS_CCACHE_TRICK" = xyes; then
 234         AC_MSG_RESULT([yes])
 235         CFLAGS_CCACHE="$CCACHE_PRECOMP_FLAG"
 236         AC_SUBST(CFLAGS_CCACHE)
 237         CCACHE_SLOPPINESS=pch_defines,time_macros
 238       else
 239         AC_MSG_RESULT([no])
 240         AC_MSG_ERROR([Cannot use ccache with precompiled headers without compiler support for $CCACHE_PRECOMP_FLAG])
 241       fi
 242     fi
 243 
 244     CCACHE="CCACHE_COMPRESS=1 $SET_CCACHE_DIR \
 245         CCACHE_SLOPPINESS=$CCACHE_SLOPPINESS CCACHE_BASEDIR=$TOPDIR $CCACHE"
 246 
 247     if test "x$SET_CCACHE_DIR" != x; then
 248       mkdir -p $CCACHE_DIR > /dev/null 2>&1
 249       chmod a+rwxs $CCACHE_DIR > /dev/null 2>&1
 250     fi
 251   fi
 252 ])
 253 
 254 ################################################################################
 255 #
 256 # Runs icecc-create-env once and prints the error if it fails
 257 #
 258 # $1: arguments to icecc-create-env
 259 # $2: log file
 260 #
 261 AC_DEFUN([BPERF_RUN_ICECC_CREATE_ENV],
 262 [
 263   cd ${CONFIGURESUPPORT_OUTPUTDIR}/icecc \
 264       && ${ICECC_CREATE_ENV} $1 > $2 2>&1
 265   if test "$?" != "0"; then
 266     AC_MSG_NOTICE([icecc-create-env output:])
 267     cat $2
 268     AC_MSG_ERROR([Failed to create icecc compiler environment])
 269   fi
 270 ])
 271 
 272 ################################################################################
 273 #
 274 # Optionally enable distributed compilation of native code using icecc/icecream
 275 #
 276 AC_DEFUN([BPERF_SETUP_ICECC],
 277 [
 278   AC_ARG_ENABLE([icecc], [AS_HELP_STRING([--enable-icecc],
 279       [enable distribted compilation of native code using icecc/icecream @<:@disabled@:>@])])
 280 
 281   if test "x${enable_icecc}" = "xyes"; then
 282     BASIC_REQUIRE_PROGS(ICECC_CMD, icecc)
 283     old_path="$PATH"
 284 
 285     # Look for icecc-create-env in some known places
 286     PATH="$PATH:/usr/lib/icecc:/usr/lib64/icecc"
 287     BASIC_REQUIRE_PROGS(ICECC_CREATE_ENV, icecc-create-env)
 288     # Use icecc-create-env to create a minimal compilation environment that can
 289     # be sent to the other hosts in the icecream cluster.
 290     icecc_create_env_log="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/icecc_create_env.log"
 291     ${MKDIR} -p ${CONFIGURESUPPORT_OUTPUTDIR}/icecc
 292     # Older versions of icecc does not have the --gcc parameter
 293     if ${ICECC_CREATE_ENV} | $GREP -q -e --gcc; then
 294       icecc_gcc_arg="--gcc"
 295     fi
 296     if test "x${TOOLCHAIN_TYPE}" = "xgcc"; then
 297       BPERF_RUN_ICECC_CREATE_ENV([${icecc_gcc_arg} ${CC} ${CXX}], \
 298           ${icecc_create_env_log})
 299     elif test "x$TOOLCHAIN_TYPE" = "xclang"; then
 300       # For clang, the icecc compilerwrapper is needed. It usually resides next
 301       # to icecc-create-env.
 302       BASIC_REQUIRE_PROGS(ICECC_WRAPPER, compilerwrapper)
 303       BPERF_RUN_ICECC_CREATE_ENV([--clang ${CC} ${ICECC_WRAPPER}], ${icecc_create_env_log})
 304     else
 305       AC_MSG_ERROR([Can only create icecc compiler packages for toolchain types gcc and clang])
 306     fi
 307     PATH="$old_path"
 308     # The bundle with the compiler gets a name based on checksums. Parse log file
 309     # to find it.
 310     ICECC_ENV_BUNDLE_BASENAME="`${SED} -n '/^creating/s/creating //p' ${icecc_create_env_log}`"
 311     ICECC_ENV_BUNDLE="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/${ICECC_ENV_BUNDLE_BASENAME}"
 312     if test ! -f ${ICECC_ENV_BUNDLE}; then
 313       AC_MSG_ERROR([icecc-create-env did not produce an environment ${ICECC_ENV_BUNDLE}])
 314     fi
 315     AC_MSG_CHECKING([for icecc build environment for target compiler])
 316     AC_MSG_RESULT([${ICECC_ENV_BUNDLE}])
 317     ICECC="ICECC_VERSION=${ICECC_ENV_BUNDLE} ICECC_CC=${CC} ICECC_CXX=${CXX} ${ICECC_CMD}"
 318 
 319     if test "x${COMPILE_TYPE}" = "xcross"; then
 320       # If cross compiling, create a separate env package for the build compiler
 321       # Assume "gcc" or "cc" is gcc and "clang" is clang. Otherwise bail.
 322       icecc_create_env_log_build="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/icecc_create_env_build.log"
 323       if test "x${BUILD_CC##*/}" = "xgcc" ||  test "x${BUILD_CC##*/}" = "xcc"; then
 324         BPERF_RUN_ICECC_CREATE_ENV([${icecc_gcc_arg} ${BUILD_CC} ${BUILD_CXX}], \
 325             ${icecc_create_env_log_build})
 326       elif test "x${BUILD_CC##*/}" = "xclang"; then
 327         BPERF_RUN_ICECC_CREATE_ENV([--clang ${BUILD_CC} ${ICECC_WRAPPER}], ${icecc_create_env_log_build})
 328       else
 329         AC_MSG_ERROR([Cannot create icecc compiler package for ${BUILD_CC}])
 330       fi
 331       ICECC_ENV_BUNDLE_BASENAME="`${SED} -n '/^creating/s/creating //p' ${icecc_create_env_log_build}`"
 332       ICECC_ENV_BUNDLE="${CONFIGURESUPPORT_OUTPUTDIR}/icecc/${ICECC_ENV_BUNDLE_BASENAME}"
 333       if test ! -f ${ICECC_ENV_BUNDLE}; then
 334         AC_MSG_ERROR([icecc-create-env did not produce an environment ${ICECC_ENV_BUNDLE}])
 335       fi
 336       AC_MSG_CHECKING([for icecc build environment for build compiler])
 337       AC_MSG_RESULT([${ICECC_ENV_BUNDLE}])
 338       BUILD_ICECC="ICECC_VERSION=${ICECC_ENV_BUNDLE} ICECC_CC=${BUILD_CC} \
 339           ICECC_CXX=${BUILD_CXX} ${ICECC_CMD}"
 340     else
 341       BUILD_ICECC="${ICECC}"
 342     fi
 343     AC_SUBST(ICECC)
 344     AC_SUBST(BUILD_ICECC)
 345   fi
 346 ])
 347 
 348 AC_DEFUN_ONCE([BPERF_SETUP_PRECOMPILED_HEADERS],
 349 [
 350 
 351   ###############################################################################
 352   #
 353   # Can the C/C++ compiler use precompiled headers?
 354   #
 355   AC_ARG_ENABLE([precompiled-headers], [AS_HELP_STRING([--disable-precompiled-headers],
 356       [disable using precompiled headers when compiling C++ @<:@enabled@:>@])],
 357       [ENABLE_PRECOMPH=${enable_precompiled_headers}], [ENABLE_PRECOMPH=yes])
 358 
 359   USE_PRECOMPILED_HEADER=1
 360   AC_MSG_CHECKING([If precompiled header is enabled])
 361   if test "x$ENABLE_PRECOMPH" = xno; then
 362     AC_MSG_RESULT([no, forced])
 363     USE_PRECOMPILED_HEADER=0
 364   elif test "x$ICECC" != "x"; then
 365     AC_MSG_RESULT([no, does not work effectively with icecc])
 366     USE_PRECOMPILED_HEADER=0
 367   else
 368     AC_MSG_RESULT([yes])
 369   fi
 370 
 371   if test "x$ENABLE_PRECOMPH" = xyes; then
 372     # Check that the compiler actually supports precomp headers.
 373     if test "x$TOOLCHAIN_TYPE" = xgcc; then
 374       AC_MSG_CHECKING([that precompiled headers work])
 375       echo "int alfa();" > conftest.h
 376       $CXX -x c++-header conftest.h -o conftest.hpp.gch 2>&AS_MESSAGE_LOG_FD >&AS_MESSAGE_LOG_FD
 377       if test ! -f conftest.hpp.gch; then
 378         USE_PRECOMPILED_HEADER=0
 379         AC_MSG_RESULT([no])
 380       else
 381         AC_MSG_RESULT([yes])
 382       fi
 383       rm -f conftest.h conftest.hpp.gch
 384     fi
 385   fi
 386 
 387   AC_SUBST(USE_PRECOMPILED_HEADER)
 388 ])
 389 
 390 
 391 AC_DEFUN_ONCE([BPERF_SETUP_SMART_JAVAC],
 392 [
 393   AC_ARG_WITH(sjavac-server-java, [AS_HELP_STRING([--with-sjavac-server-java],
 394       [use this java binary for running the sjavac background server @<:@Boot JDK java@:>@])])
 395 
 396   if test "x$with_sjavac_server_java" != x; then
 397     SJAVAC_SERVER_JAVA="$with_sjavac_server_java"
 398     FOUND_VERSION=`$SJAVAC_SERVER_JAVA -version 2>&1 | grep " version \""`
 399     if test "x$FOUND_VERSION" = x; then
 400       AC_MSG_ERROR([Could not execute server java: $SJAVAC_SERVER_JAVA])
 401     fi
 402   else
 403     SJAVAC_SERVER_JAVA="$JAVA"
 404   fi
 405   AC_SUBST(SJAVAC_SERVER_JAVA)
 406 
 407   if test "$MEMORY_SIZE" -gt "3000"; then
 408     ADD_JVM_ARG_IF_OK([-d64],SJAVAC_SERVER_JAVA_FLAGS,[$SJAVAC_SERVER_JAVA])
 409     if test "$JVM_ARG_OK" = true; then
 410       JVM_64BIT=true
 411       JVM_ARG_OK=false
 412     fi
 413   fi
 414 
 415   MX_VALUE=`expr $MEMORY_SIZE / 2`
 416   if test "$JVM_64BIT" = true; then
 417     # Set ms lower than mx since more than one instance of the server might
 418     # get launched at the same time before they figure out which instance won.
 419     MS_VALUE=512
 420     if test "$MX_VALUE" -gt "2048"; then
 421       MX_VALUE=2048
 422     fi
 423   else
 424     MS_VALUE=256
 425     if test "$MX_VALUE" -gt "1500"; then
 426       MX_VALUE=1500
 427     fi
 428   fi
 429   if test "$MX_VALUE" -lt "512"; then
 430     MX_VALUE=512
 431   fi
 432   ADD_JVM_ARG_IF_OK([-Xms${MS_VALUE}M -Xmx${MX_VALUE}M],SJAVAC_SERVER_JAVA_FLAGS,[$SJAVAC_SERVER_JAVA])
 433   AC_SUBST(SJAVAC_SERVER_JAVA_FLAGS)
 434 
 435   AC_ARG_ENABLE([sjavac], [AS_HELP_STRING([--enable-sjavac],
 436       [use sjavac to do fast incremental compiles @<:@disabled@:>@])],
 437       [ENABLE_SJAVAC="${enableval}"], [ENABLE_SJAVAC="no"])
 438   if test "x$JVM_ARG_OK" = "xfalse"; then
 439     AC_MSG_WARN([Could not set -Xms${MS_VALUE}M -Xmx${MX_VALUE}M, disabling sjavac])
 440     ENABLE_SJAVAC="no"
 441   fi
 442   AC_MSG_CHECKING([whether to use sjavac])
 443   AC_MSG_RESULT([$ENABLE_SJAVAC])
 444   AC_SUBST(ENABLE_SJAVAC)
 445 
 446   AC_ARG_ENABLE([javac-server], [AS_HELP_STRING([--disable-javac-server],
 447       [disable javac server @<:@enabled@:>@])],
 448       [ENABLE_JAVAC_SERVER="${enableval}"], [ENABLE_JAVAC_SERVER="yes"])
 449   if test "x$JVM_ARG_OK" = "xfalse"; then
 450     AC_MSG_WARN([Could not set -Xms${MS_VALUE}M -Xmx${MX_VALUE}M, disabling javac server])
 451     ENABLE_JAVAC_SERVER="no"
 452   fi
 453   AC_MSG_CHECKING([whether to use javac server])
 454   AC_MSG_RESULT([$ENABLE_JAVAC_SERVER])
 455   AC_SUBST(ENABLE_JAVAC_SERVER)
 456 
 457   if test "x$ENABLE_JAVAC_SERVER" = "xyes" || "x$ENABLE_SJAVAC" = "xyes"; then
 458     # When using a server javac, the small client instances do not need much
 459     # resources.
 460     JAVA_FLAGS_JAVAC="$JAVA_FLAGS_SMALL"
 461   fi
 462 ])