1 #
   2 # Copyright (c) 2011, 2018, 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 ########################################################################
  27 # This file is responsible for detecting, verifying and setting up the
  28 # toolchain, i.e. the compiler, linker and related utilities. It will setup
  29 # proper paths to the binaries, but it will not setup any flags.
  30 #
  31 # The binaries used is determined by the toolchain type, which is the family of
  32 # compilers and related tools that are used.
  33 ########################################################################
  34 
  35 
  36 # All valid toolchains, regardless of platform (used by help.m4)
  37 VALID_TOOLCHAINS_all="gcc clang solstudio xlc microsoft"
  38 
  39 # These toolchains are valid on different platforms
  40 VALID_TOOLCHAINS_linux="gcc clang"
  41 VALID_TOOLCHAINS_solaris="solstudio"
  42 VALID_TOOLCHAINS_macosx="gcc clang"
  43 VALID_TOOLCHAINS_aix="xlc"
  44 VALID_TOOLCHAINS_windows="microsoft"
  45 
  46 # Toolchain descriptions
  47 TOOLCHAIN_DESCRIPTION_clang="clang/LLVM"
  48 TOOLCHAIN_DESCRIPTION_gcc="GNU Compiler Collection"
  49 TOOLCHAIN_DESCRIPTION_microsoft="Microsoft Visual Studio"
  50 TOOLCHAIN_DESCRIPTION_solstudio="Oracle Solaris Studio"
  51 TOOLCHAIN_DESCRIPTION_xlc="IBM XL C/C++"
  52 
  53 # Minimum supported versions, empty means unspecified
  54 TOOLCHAIN_MINIMUM_VERSION_clang="3.2"
  55 TOOLCHAIN_MINIMUM_VERSION_gcc="4.8"
  56 TOOLCHAIN_MINIMUM_VERSION_microsoft="16.00.30319.01" # VS2010
  57 TOOLCHAIN_MINIMUM_VERSION_solstudio="5.13"
  58 TOOLCHAIN_MINIMUM_VERSION_xlc=""
  59 
  60 # Minimum supported linker versions, empty means unspecified
  61 TOOLCHAIN_MINIMUM_LD_VERSION_gcc="2.18"
  62 
  63 # Prepare the system so that TOOLCHAIN_CHECK_COMPILER_VERSION can be called.
  64 # Must have CC_VERSION_NUMBER and CXX_VERSION_NUMBER.
  65 # $1 - optional variable prefix for compiler and version variables (BUILD_)
  66 # $2 - optional variable prefix for comparable variable (OPENJDK_BUILD_)
  67 AC_DEFUN([TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS],
  68 [
  69   if test "x[$]$1CC_VERSION_NUMBER" != "x[$]$1CXX_VERSION_NUMBER"; then
  70     AC_MSG_WARN([C and C++ compiler have different version numbers, [$]$1CC_VERSION_NUMBER vs [$]$1CXX_VERSION_NUMBER.])
  71     AC_MSG_WARN([This typically indicates a broken setup, and is not supported])
  72   fi
  73 
  74   # We only check CC_VERSION_NUMBER since we assume CXX_VERSION_NUMBER is equal.
  75   if [ [[ "[$]$1CC_VERSION_NUMBER" =~ (.*\.){4} ]] ]; then
  76     AC_MSG_WARN([C compiler version number has more than four parts (W.X.Y.Z): [$]$1CC_VERSION_NUMBER. Comparisons might be wrong.])
  77   fi
  78 
  79   if [ [[  "[$]$1CC_VERSION_NUMBER" =~ [0-9]{6} ]] ]; then
  80     AC_MSG_WARN([C compiler version number has a part larger than 99999: [$]$1CC_VERSION_NUMBER. Comparisons might be wrong.])
  81   fi
  82 
  83   $2COMPARABLE_ACTUAL_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "[$]$1CC_VERSION_NUMBER"`
  84 ])
  85 
  86 # Check if the configured compiler (C and C++) is of a specific version or
  87 # newer. TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS must have been called before.
  88 #
  89 # Arguments:
  90 #   VERSION:   The version string to check against the found version
  91 #   IF_AT_LEAST:   block to run if the compiler is at least this version (>=)
  92 #   IF_OLDER_THAN:   block to run if the compiler is older than this version (<)
  93 #   PREFIX:   Optional variable prefix for compiler to compare version for (OPENJDK_BUILD_)
  94 BASIC_DEFUN_NAMED([TOOLCHAIN_CHECK_COMPILER_VERSION],
  95     [*VERSION PREFIX IF_AT_LEAST IF_OLDER_THAN], [$@],
  96 [
  97   # Need to assign to a variable since m4 is blocked from modifying parts in [].
  98   REFERENCE_VERSION=ARG_VERSION
  99 
 100   if [ [[ "$REFERENCE_VERSION" =~ (.*\.){4} ]] ]; then
 101     AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only four parts (W.X.Y.Z) is supported])
 102   fi
 103 
 104   if [ [[ "$REFERENCE_VERSION" =~ [0-9]{6} ]] ]; then
 105     AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only parts < 99999 is supported])
 106   fi
 107 
 108   # Version comparison method inspired by http://stackoverflow.com/a/24067243
 109   COMPARABLE_REFERENCE_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "$REFERENCE_VERSION"`
 110 
 111   if test [$]ARG_PREFIX[COMPARABLE_ACTUAL_VERSION] -ge $COMPARABLE_REFERENCE_VERSION ; then
 112     :
 113     ARG_IF_AT_LEAST
 114   else
 115     :
 116     ARG_IF_OLDER_THAN
 117   fi
 118 ])
 119 
 120 # Prepare the system so that TOOLCHAIN_CHECK_COMPILER_VERSION can be called.
 121 # Must have LD_VERSION_NUMBER.
 122 # $1 - optional variable prefix for compiler and version variables (BUILD_)
 123 # $2 - optional variable prefix for comparable variable (OPENJDK_BUILD_)
 124 AC_DEFUN([TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS],
 125 [
 126   if [ [[ "[$]$1LD_VERSION_NUMBER" =~ (.*\.){4} ]] ]; then
 127     AC_MSG_WARN([Linker version number has more than four parts (W.X.Y.Z): [$]$1LD_VERSION_NUMBER. Comparisons might be wrong.])
 128   fi
 129 
 130   if [ [[  "[$]$1LD_VERSION_NUMBER" =~ [0-9]{6} ]] ]; then
 131     AC_MSG_WARN([Linker version number has a part larger than 99999: [$]$1LD_VERSION_NUMBER. Comparisons might be wrong.])
 132   fi
 133 
 134   $2COMPARABLE_ACTUAL_LD_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "[$]$1LD_VERSION_NUMBER"`
 135 ])
 136 
 137 # Check if the configured linker is of a specific version or
 138 # newer. TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS must have been called before.
 139 #
 140 # Arguments:
 141 #   VERSION:   The version string to check against the found version
 142 #   IF_AT_LEAST:   block to run if the compiler is at least this version (>=)
 143 #   IF_OLDER_THAN:   block to run if the compiler is older than this version (<)
 144 #   PREFIX:   Optional variable prefix for compiler to compare version for (OPENJDK_BUILD_)
 145 BASIC_DEFUN_NAMED([TOOLCHAIN_CHECK_LINKER_VERSION],
 146     [*VERSION PREFIX IF_AT_LEAST IF_OLDER_THAN], [$@],
 147 [
 148   # Need to assign to a variable since m4 is blocked from modifying parts in [].
 149   REFERENCE_VERSION=ARG_VERSION
 150 
 151   if [ [[ "$REFERENCE_VERSION" =~ (.*\.){4} ]] ]; then
 152     AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only four parts (W.X.Y.Z) is supported])
 153   fi
 154 
 155   if [ [[ "$REFERENCE_VERSION" =~ [0-9]{6} ]] ]; then
 156     AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only parts < 99999 is supported])
 157   fi
 158 
 159   # Version comparison method inspired by http://stackoverflow.com/a/24067243
 160   COMPARABLE_REFERENCE_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "$REFERENCE_VERSION"`
 161 
 162   if test [$]ARG_PREFIX[COMPARABLE_ACTUAL_LD_VERSION] -ge $COMPARABLE_REFERENCE_VERSION ; then
 163     :
 164     ARG_IF_AT_LEAST
 165   else
 166     :
 167     ARG_IF_OLDER_THAN
 168   fi
 169 ])
 170 
 171 # Setup a number of variables describing how native output files are
 172 # named on this platform/toolchain.
 173 AC_DEFUN([TOOLCHAIN_SETUP_FILENAME_PATTERNS],
 174 [
 175   # Define filename patterns
 176   if test "x$OPENJDK_TARGET_OS" = xwindows; then
 177     LIBRARY_PREFIX=
 178     SHARED_LIBRARY_SUFFIX='.dll'
 179     STATIC_LIBRARY_SUFFIX='.lib'
 180     SHARED_LIBRARY='[$]1.dll'
 181     STATIC_LIBRARY='[$]1.lib'
 182     OBJ_SUFFIX='.obj'
 183     EXE_SUFFIX='.exe'
 184   else
 185     LIBRARY_PREFIX=lib
 186     SHARED_LIBRARY_SUFFIX='.so'
 187     STATIC_LIBRARY_SUFFIX='.a'
 188     SHARED_LIBRARY='lib[$]1.so'
 189     STATIC_LIBRARY='lib[$]1.a'
 190     OBJ_SUFFIX='.o'
 191     EXE_SUFFIX=''
 192     if test "x$OPENJDK_TARGET_OS" = xmacosx; then
 193       # For full static builds, we're overloading the SHARED_LIBRARY
 194       # variables in order to limit the amount of changes required.
 195       # It would be better to remove SHARED and just use LIBRARY and
 196       # LIBRARY_SUFFIX for libraries that can be built either
 197       # shared or static and use STATIC_* for libraries that are
 198       # always built statically.
 199       if test "x$STATIC_BUILD" = xtrue; then
 200         SHARED_LIBRARY='lib[$]1.a'
 201         SHARED_LIBRARY_SUFFIX='.a'
 202       else
 203         SHARED_LIBRARY='lib[$]1.dylib'
 204         SHARED_LIBRARY_SUFFIX='.dylib'
 205       fi
 206     fi
 207   fi
 208 
 209   AC_SUBST(LIBRARY_PREFIX)
 210   AC_SUBST(SHARED_LIBRARY_SUFFIX)
 211   AC_SUBST(STATIC_LIBRARY_SUFFIX)
 212   AC_SUBST(SHARED_LIBRARY)
 213   AC_SUBST(STATIC_LIBRARY)
 214   AC_SUBST(OBJ_SUFFIX)
 215   AC_SUBST(EXE_SUFFIX)
 216 ])
 217 
 218 # Determine which toolchain type to use, and make sure it is valid for this
 219 # platform. Setup various information about the selected toolchain.
 220 AC_DEFUN_ONCE([TOOLCHAIN_DETERMINE_TOOLCHAIN_TYPE],
 221 [
 222   AC_ARG_WITH(toolchain-type, [AS_HELP_STRING([--with-toolchain-type],
 223       [the toolchain type (or family) to use, use '--help' to show possible values @<:@platform dependent@:>@])])
 224 
 225   # Use indirect variable referencing
 226   toolchain_var_name=VALID_TOOLCHAINS_$OPENJDK_BUILD_OS
 227   VALID_TOOLCHAINS=${!toolchain_var_name}
 228 
 229   if test "x$OPENJDK_TARGET_OS" = xmacosx; then
 230     if test -n "$XCODEBUILD"; then
 231       # On Mac OS X, default toolchain to clang after Xcode 5
 232       XCODE_VERSION_OUTPUT=`"$XCODEBUILD" -version 2>&1 | $HEAD -n 1`
 233       $ECHO "$XCODE_VERSION_OUTPUT" | $GREP "Xcode " > /dev/null
 234       if test $? -ne 0; then
 235         AC_MSG_NOTICE([xcodebuild output: $XCODE_VERSION_OUTPUT])
 236         AC_MSG_ERROR([Failed to determine Xcode version.])
 237       fi
 238       XCODE_MAJOR_VERSION=`$ECHO $XCODE_VERSION_OUTPUT | \
 239           $SED -e 's/^Xcode \(@<:@1-9@:>@@<:@0-9.@:>@*\)/\1/' | \
 240           $CUT -f 1 -d .`
 241       AC_MSG_NOTICE([Xcode major version: $XCODE_MAJOR_VERSION])
 242       if test $XCODE_MAJOR_VERSION -ge 5; then
 243           DEFAULT_TOOLCHAIN="clang"
 244       else
 245           DEFAULT_TOOLCHAIN="gcc"
 246       fi
 247     else
 248       # If Xcode is not installed, but the command line tools are
 249       # then we can't run xcodebuild. On these systems we should
 250       # default to clang
 251       DEFAULT_TOOLCHAIN="clang"
 252     fi
 253   else
 254     # First toolchain type in the list is the default
 255     DEFAULT_TOOLCHAIN=${VALID_TOOLCHAINS%% *}
 256   fi
 257 
 258   if test "x$with_toolchain_type" = xlist; then
 259     # List all toolchains
 260     AC_MSG_NOTICE([The following toolchains are valid on this platform:])
 261     for toolchain in $VALID_TOOLCHAINS; do
 262       toolchain_var_name=TOOLCHAIN_DESCRIPTION_$toolchain
 263       TOOLCHAIN_DESCRIPTION=${!toolchain_var_name}
 264       $PRINTF "  %-10s  %s\n" $toolchain "$TOOLCHAIN_DESCRIPTION"
 265     done
 266 
 267     exit 0
 268   elif test "x$with_toolchain_type" != x; then
 269     # User override; check that it is valid
 270     if test "x${VALID_TOOLCHAINS/$with_toolchain_type/}" = "x${VALID_TOOLCHAINS}"; then
 271       AC_MSG_NOTICE([Toolchain type $with_toolchain_type is not valid on this platform.])
 272       AC_MSG_NOTICE([Valid toolchains: $VALID_TOOLCHAINS.])
 273       AC_MSG_ERROR([Cannot continue.])
 274     fi
 275     TOOLCHAIN_TYPE=$with_toolchain_type
 276   else
 277     # No flag given, use default
 278     TOOLCHAIN_TYPE=$DEFAULT_TOOLCHAIN
 279   fi
 280   AC_SUBST(TOOLCHAIN_TYPE)
 281 
 282   TOOLCHAIN_CC_BINARY_clang="clang"
 283   TOOLCHAIN_CC_BINARY_gcc="gcc"
 284   TOOLCHAIN_CC_BINARY_microsoft="cl$EXECUTABLE_SUFFIX"
 285   TOOLCHAIN_CC_BINARY_solstudio="cc"
 286   TOOLCHAIN_CC_BINARY_xlc="xlc_r"
 287 
 288   TOOLCHAIN_CXX_BINARY_clang="clang++"
 289   TOOLCHAIN_CXX_BINARY_gcc="g++"
 290   TOOLCHAIN_CXX_BINARY_microsoft="cl$EXECUTABLE_SUFFIX"
 291   TOOLCHAIN_CXX_BINARY_solstudio="CC"
 292   TOOLCHAIN_CXX_BINARY_xlc="xlC_r"
 293 
 294   # Use indirect variable referencing
 295   toolchain_var_name=TOOLCHAIN_DESCRIPTION_$TOOLCHAIN_TYPE
 296   TOOLCHAIN_DESCRIPTION=${!toolchain_var_name}
 297   toolchain_var_name=TOOLCHAIN_MINIMUM_VERSION_$TOOLCHAIN_TYPE
 298   TOOLCHAIN_MINIMUM_VERSION=${!toolchain_var_name}
 299   toolchain_var_name=TOOLCHAIN_MINIMUM_LD_VERSION_$TOOLCHAIN_TYPE
 300   TOOLCHAIN_MINIMUM_LD_VERSION=${!toolchain_var_name}
 301   toolchain_var_name=TOOLCHAIN_CC_BINARY_$TOOLCHAIN_TYPE
 302   TOOLCHAIN_CC_BINARY=${!toolchain_var_name}
 303   toolchain_var_name=TOOLCHAIN_CXX_BINARY_$TOOLCHAIN_TYPE
 304   TOOLCHAIN_CXX_BINARY=${!toolchain_var_name}
 305 
 306   TOOLCHAIN_SETUP_FILENAME_PATTERNS
 307 
 308   if test "x$TOOLCHAIN_TYPE" = "x$DEFAULT_TOOLCHAIN"; then
 309     AC_MSG_NOTICE([Using default toolchain $TOOLCHAIN_TYPE ($TOOLCHAIN_DESCRIPTION)])
 310   else
 311     AC_MSG_NOTICE([Using user selected toolchain $TOOLCHAIN_TYPE ($TOOLCHAIN_DESCRIPTION). Default toolchain is $DEFAULT_TOOLCHAIN.])
 312   fi
 313 ])
 314 
 315 # Before we start detecting the toolchain executables, we might need some
 316 # special setup, e.g. additional paths etc.
 317 AC_DEFUN_ONCE([TOOLCHAIN_PRE_DETECTION],
 318 [
 319   # FIXME: Is this needed?
 320   AC_LANG(C++)
 321 
 322   # Store the CFLAGS etc passed to the configure script.
 323   ORG_CFLAGS="$CFLAGS"
 324   ORG_CXXFLAGS="$CXXFLAGS"
 325 
 326   # autoconf magic only relies on PATH, so update it if tools dir is specified
 327   OLD_PATH="$PATH"
 328 
 329   # On Windows, we need to detect the visual studio installation first.
 330   # This will change the PATH, but we need to keep that new PATH even
 331   # after toolchain detection is done, since the compiler (on x86) uses
 332   # it for DLL resolution in runtime.
 333   if test "x$OPENJDK_BUILD_OS" = "xwindows" \
 334       && test "x$TOOLCHAIN_TYPE" = "xmicrosoft"; then
 335     TOOLCHAIN_SETUP_VISUAL_STUDIO_ENV
 336     if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 337       # Append VS_PATH
 338       BASIC_APPEND_TO_PATH(PATH, $VS_PATH)
 339       BASIC_APPEND_TO_PATH(WSLENV, "PATH/l:LIB:INCLUDE")
 340       export WSLENV
 341     else
 342       # Reset path to VS_PATH. It will include everything that was on PATH at the time we
 343       # ran TOOLCHAIN_SETUP_VISUAL_STUDIO_ENV.
 344       BASIC_APPEND_TO_PATH(PATH, $VS_PATH)
 345       AC_MSG_NOTICE(PATH $PATH)
 346     fi
 347     # The microsoft toolchain also requires INCLUDE and LIB to be set.
 348     export INCLUDE="$VS_INCLUDE"
 349     export LIB="$VS_LIB"
 350   else
 351     if test "x$XCODE_VERSION_OUTPUT" != x; then
 352       # For Xcode, we set the Xcode version as TOOLCHAIN_VERSION
 353       TOOLCHAIN_VERSION=`$ECHO $XCODE_VERSION_OUTPUT | $CUT -f 2 -d ' '`
 354       TOOLCHAIN_DESCRIPTION="$TOOLCHAIN_DESCRIPTION from Xcode $TOOLCHAIN_VERSION"
 355     else
 356       # Currently we do not define this for other toolchains. This might change as the need arise.
 357       TOOLCHAIN_VERSION=
 358     fi
 359   fi
 360   AC_SUBST(TOOLCHAIN_VERSION)
 361 
 362   # Finally add TOOLCHAIN_PATH at the beginning, to allow --with-tools-dir to
 363   # override all other locations.
 364   if test "x$TOOLCHAIN_PATH" != x; then
 365     PATH=$TOOLCHAIN_PATH:$PATH
 366   fi
 367 ])
 368 
 369 # Restore path, etc
 370 AC_DEFUN_ONCE([TOOLCHAIN_POST_DETECTION],
 371 [
 372   # Restore old path, except for the microsoft toolchain, which requires VS_PATH
 373   # to remain in place. Otherwise the compiler will not work in some siutations
 374   # in later configure checks.
 375   if test "x$TOOLCHAIN_TYPE" != "xmicrosoft"; then
 376     PATH="$OLD_PATH"
 377   fi
 378 
 379   # Restore the flags to the user specified values.
 380   # This is necessary since AC_PROG_CC defaults CFLAGS to "-g -O2"
 381   CFLAGS="$ORG_CFLAGS"
 382   CXXFLAGS="$ORG_CXXFLAGS"
 383 ])
 384 
 385 # Check if a compiler is of the toolchain type we expect, and save the version
 386 # information from it. If the compiler does not match the expected type,
 387 # this function will abort using AC_MSG_ERROR. If it matches, the version will
 388 # be stored in CC_VERSION_NUMBER/CXX_VERSION_NUMBER (as a dotted number), and
 389 # the full version string in CC_VERSION_STRING/CXX_VERSION_STRING.
 390 #
 391 # $1 = compiler to test (CC or CXX)
 392 # $2 = human readable name of compiler (C or C++)
 393 AC_DEFUN([TOOLCHAIN_EXTRACT_COMPILER_VERSION],
 394 [
 395   COMPILER=[$]$1
 396   COMPILER_NAME=$2
 397 
 398   if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
 399     # cc -V output typically looks like
 400     #     cc: Sun C 5.12 Linux_i386 2011/11/16
 401     # or
 402     #     cc: Studio 12.5 Sun C 5.14 SunOS_sparc 2016/05/31
 403     COMPILER_VERSION_OUTPUT=`$COMPILER -V 2>&1`
 404     # Check that this is likely to be the Solaris Studio cc.
 405     $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "^.* Sun $COMPILER_NAME" > /dev/null
 406     if test $? -ne 0; then
 407       ALT_VERSION_OUTPUT=`$COMPILER --version 2>&1`
 408       AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
 409       AC_MSG_NOTICE([The result from running with -V was: "$COMPILER_VERSION_OUTPUT"])
 410       AC_MSG_NOTICE([The result from running with --version was: "$ALT_VERSION_OUTPUT"])
 411       AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
 412     fi
 413     # Remove usage instructions (if present), and
 414     # collapse compiler output into a single line
 415     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT | \
 416         $SED -e 's/ *@<:@Uu@:>@sage:.*//'`
 417     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
 418         $SED -e "s/^.*@<:@ ,\t@:>@$COMPILER_NAME@<:@ ,\t@:>@\(@<:@1-9@:>@\.@<:@0-9@:>@@<:@0-9@:>@*\).*/\1/"`
 419   elif test  "x$TOOLCHAIN_TYPE" = xxlc; then
 420     # xlc -qversion output typically looks like
 421     #     IBM XL C/C++ for AIX, V11.1 (5724-X13)
 422     #     Version: 11.01.0000.0015
 423     COMPILER_VERSION_OUTPUT=`$COMPILER -qversion 2>&1`
 424     # Check that this is likely to be the IBM XL C compiler.
 425     $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "IBM XL C" > /dev/null
 426     if test $? -ne 0; then
 427       ALT_VERSION_OUTPUT=`$COMPILER --version 2>&1`
 428       AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
 429       AC_MSG_NOTICE([The result from running with -qversion was: "$COMPILER_VERSION_OUTPUT"])
 430       AC_MSG_NOTICE([The result from running with --version was: "$ALT_VERSION_OUTPUT"])
 431       AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
 432     fi
 433     # Collapse compiler output into a single line
 434     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT`
 435     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
 436         $SED -e 's/^.*, V\(@<:@1-9@:>@@<:@0-9.@:>@*\).*$/\1/'`
 437   elif test  "x$TOOLCHAIN_TYPE" = xmicrosoft; then
 438     # There is no specific version flag, but all output starts with a version string.
 439     # First line typically looks something like:
 440     # Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.40219.01 for 80x86
 441     COMPILER_VERSION_OUTPUT=`"$COMPILER" 2>&1 | $HEAD -n 1 | $TR -d '\r'`
 442     # Check that this is likely to be Microsoft CL.EXE.
 443     $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "Microsoft.*Compiler" > /dev/null
 444     if test $? -ne 0; then
 445       AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
 446       AC_MSG_NOTICE([The result from running it was: "$COMPILER_VERSION_OUTPUT"])
 447       AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
 448     fi
 449     # Collapse compiler output into a single line
 450     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT`
 451     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
 452         $SED -e 's/^.*ersion.\(@<:@1-9@:>@@<:@0-9.@:>@*\) .*$/\1/'`
 453   elif test  "x$TOOLCHAIN_TYPE" = xgcc; then
 454     # gcc --version output typically looks like
 455     #     gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
 456     #     Copyright (C) 2013 Free Software Foundation, Inc.
 457     #     This is free software; see the source for copying conditions.  There is NO
 458     #     warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 459     COMPILER_VERSION_OUTPUT=`$COMPILER --version 2>&1`
 460     # Check that this is likely to be GCC.
 461     $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "Free Software Foundation" > /dev/null
 462     if test $? -ne 0; then
 463       AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
 464       AC_MSG_NOTICE([The result from running with --version was: "$COMPILER_VERSION"])
 465       AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
 466     fi
 467     # Remove Copyright and legalese from version string, and
 468     # collapse into a single line
 469     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT | \
 470         $SED -e 's/ *Copyright .*//'`
 471     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
 472         $SED -e 's/^.* \(@<:@1-9@:>@\.@<:@0-9.@:>@*\)@<:@^0-9.@:>@.*$/\1/'`
 473   elif test  "x$TOOLCHAIN_TYPE" = xclang; then
 474     # clang --version output typically looks like
 475     #    Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
 476     #    clang version 3.3 (tags/RELEASE_33/final)
 477     # or
 478     #    Debian clang version 3.2-7ubuntu1 (tags/RELEASE_32/final) (based on LLVM 3.2)
 479     #    Target: x86_64-pc-linux-gnu
 480     #    Thread model: posix
 481     COMPILER_VERSION_OUTPUT=`$COMPILER --version 2>&1`
 482     # Check that this is likely to be clang
 483     $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "clang" > /dev/null
 484     if test $? -ne 0; then
 485       AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
 486       AC_MSG_NOTICE([The result from running with --version was: "$COMPILER_VERSION_OUTPUT"])
 487       AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
 488     fi
 489     # Collapse compiler output into a single line
 490     COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT`
 491     COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
 492         $SED -e 's/^.* version \(@<:@1-9@:>@@<:@0-9.@:>@*\).*$/\1/'`
 493   else
 494       AC_MSG_ERROR([Unknown toolchain type $TOOLCHAIN_TYPE.])
 495   fi
 496   # This sets CC_VERSION_NUMBER or CXX_VERSION_NUMBER. (This comment is a grep marker)
 497   $1_VERSION_NUMBER="$COMPILER_VERSION_NUMBER"
 498   # This sets CC_VERSION_STRING or CXX_VERSION_STRING. (This comment is a grep marker)
 499   $1_VERSION_STRING="$COMPILER_VERSION_STRING"
 500 
 501   AC_MSG_NOTICE([Using $TOOLCHAIN_TYPE $COMPILER_NAME compiler version $COMPILER_VERSION_NUMBER @<:@$COMPILER_VERSION_STRING@:>@])
 502 ])
 503 
 504 # Try to locate the given C or C++ compiler in the path, or otherwise.
 505 #
 506 # $1 = compiler to test (CC or CXX)
 507 # $2 = human readable name of compiler (C or C++)
 508 # $3 = compiler name to search for
 509 AC_DEFUN([TOOLCHAIN_FIND_COMPILER],
 510 [
 511   COMPILER_NAME=$2
 512   SEARCH_LIST="$3"
 513 
 514   if test "x[$]$1" != x; then
 515     # User has supplied compiler name already, always let that override.
 516     AC_MSG_NOTICE([Will use user supplied compiler $1=[$]$1])
 517     if test "x`basename [$]$1`" = "x[$]$1"; then
 518       # A command without a complete path is provided, search $PATH.
 519 
 520       AC_PATH_PROGS(POTENTIAL_$1, [$]$1)
 521       if test "x$POTENTIAL_$1" != x; then
 522         $1=$POTENTIAL_$1
 523       else
 524         AC_MSG_ERROR([User supplied compiler $1=[$]$1 could not be found])
 525       fi
 526     else
 527       # Otherwise it might already be a complete path
 528       if test ! -x "[$]$1"; then
 529         AC_MSG_ERROR([User supplied compiler $1=[$]$1 does not exist])
 530       fi
 531     fi
 532   else
 533     # No user supplied value. Locate compiler ourselves.
 534 
 535     # If we are cross compiling, assume cross compilation tools follows the
 536     # cross compilation standard where they are prefixed with the autoconf
 537     # standard name for the target. For example the binary
 538     # i686-sun-solaris2.10-gcc will cross compile for i686-sun-solaris2.10.
 539     # If we are not cross compiling, then the default compiler name will be
 540     # used.
 541 
 542     $1=
 543     # If TOOLCHAIN_PATH is set, check for all compiler names in there first
 544     # before checking the rest of the PATH.
 545     # FIXME: Now that we prefix the TOOLS_DIR to the PATH in the PRE_DETECTION
 546     # step, this should not be necessary.
 547     if test -n "$TOOLCHAIN_PATH"; then
 548       PATH_save="$PATH"
 549       PATH="$TOOLCHAIN_PATH"
 550       AC_PATH_TOOL(TOOLCHAIN_PATH_$1, $SEARCH_LIST)
 551       $1=$TOOLCHAIN_PATH_$1
 552       PATH="$PATH_save"
 553     fi
 554 
 555     # AC_PATH_TOOL can't be run multiple times with the same variable,
 556     # so create a new name for this run.
 557     if test "x[$]$1" = x; then
 558       AC_PATH_TOOL(POTENTIAL_$1, $SEARCH_LIST)
 559       $1=$POTENTIAL_$1
 560     fi
 561 
 562     if test "x[$]$1" = x; then
 563       HELP_MSG_MISSING_DEPENDENCY([devkit])
 564       AC_MSG_ERROR([Could not find a $COMPILER_NAME compiler. $HELP_MSG])
 565     fi
 566   fi
 567 
 568   # Now we have a compiler binary in $1. Make sure it's okay.
 569   BASIC_FIXUP_EXECUTABLE($1)
 570   TEST_COMPILER="[$]$1"
 571 
 572   AC_MSG_CHECKING([resolved symbolic links for $1])
 573   SYMLINK_ORIGINAL="$TEST_COMPILER"
 574   BASIC_REMOVE_SYMBOLIC_LINKS(SYMLINK_ORIGINAL)
 575   if test "x$TEST_COMPILER" = "x$SYMLINK_ORIGINAL"; then
 576     AC_MSG_RESULT([no symlink])
 577   else
 578     AC_MSG_RESULT([$SYMLINK_ORIGINAL])
 579 
 580     # We can't handle ccache by gcc wrappers, since we need to know if we're
 581     # using ccache. Instead ccache usage must be controlled by a configure option.
 582     COMPILER_BASENAME=`$BASENAME "$SYMLINK_ORIGINAL"`
 583     if test "x$COMPILER_BASENAME" = "xccache"; then
 584       AC_MSG_NOTICE([Please use --enable-ccache instead of providing a wrapped compiler.])
 585       AC_MSG_ERROR([$TEST_COMPILER is a symbolic link to ccache. This is not supported.])
 586     fi
 587   fi
 588 
 589   TOOLCHAIN_EXTRACT_COMPILER_VERSION([$1], [$COMPILER_NAME])
 590 ])
 591 
 592 # Retrieve the linker version number and store it in LD_VERSION_NUMBER
 593 # (as a dotted number), and
 594 # the full version string in LD_VERSION_STRING.
 595 #
 596 # $1 = linker to test (LD or BUILD_LD)
 597 # $2 = human readable name of linker (Linker or BuildLinker)
 598 AC_DEFUN([TOOLCHAIN_EXTRACT_LD_VERSION],
 599 [
 600   LINKER=[$]$1
 601   LINKER_NAME=$2
 602 
 603   if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
 604     # cc -Wl,-V output typically looks like
 605     #   ld: Software Generation Utilities - Solaris Link Editors: 5.11-1.2329
 606 
 607     # solstudio cc requires us to have an existing file to pass as argument,
 608     # but it need not be a syntactically correct C file, so just use
 609     # ourself. :) The intermediate 'cat' is needed to stop ld from leaving
 610     # a lingering a.out (!).
 611     LINKER_VERSION_STRING=`$LD -Wl,-V $TOPDIR/configure 2>&1 | $CAT | $HEAD -n 1 | $SED -e 's/ld: //'`
 612     # Extract version number
 613     [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
 614         $SED -e 's/.* \([0-9][0-9]*\.[0-9][0-9]*\)-\([0-9][0-9]*\.[0-9][0-9]*\)/\1.\2/'` ]
 615   elif test  "x$TOOLCHAIN_TYPE" = xxlc; then
 616     LINKER_VERSION_STRING="Unknown"
 617     LINKER_VERSION_NUMBER="0.0"
 618   elif test  "x$TOOLCHAIN_TYPE" = xmicrosoft; then
 619     # There is no specific version flag, but all output starts with a version string.
 620     # First line typically looks something like:
 621     #   Microsoft (R) Incremental Linker Version 12.00.31101.0
 622     LINKER_VERSION_STRING=`$LD 2>&1 | $HEAD -n 1 | $TR -d '\r'`
 623     # Extract version number
 624     [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
 625         $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]
 626   elif test  "x$TOOLCHAIN_TYPE" = xgcc; then
 627     # gcc -Wl,-version output typically looks like
 628     #   GNU ld (GNU Binutils for Ubuntu) 2.26.1
 629     #   Copyright (C) 2015 Free Software Foundation, Inc.
 630     #   This program is free software; [...]
 631     LINKER_VERSION_STRING=`$LD -Wl,-version 2>&1 | $HEAD -n 1`
 632     # Extract version number
 633     [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
 634         $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]
 635   elif test  "x$TOOLCHAIN_TYPE" = xclang; then
 636     # clang -Wl,-v output typically looks like
 637     #   @(#)PROGRAM:ld  PROJECT:ld64-305
 638     #   configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em (tvOS)
 639     #   Library search paths: [...]
 640     # or
 641     #   GNU ld (GNU Binutils for Ubuntu) 2.26.1
 642 
 643     LINKER_VERSION_STRING=`$LD -Wl,-v 2>&1 | $HEAD -n 1`
 644     # Check if we're using the GNU ld
 645     $ECHO "$LINKER_VERSION_STRING" | $GREP "GNU" > /dev/null
 646     if test $? -eq 0; then
 647       # Extract version number
 648       [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
 649           $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]
 650     else
 651       # Extract version number
 652       [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
 653           $SED -e 's/.*-\([0-9][0-9]*\)/\1/'` ]
 654     fi
 655   fi
 656 
 657   $1_VERSION_NUMBER="$LINKER_VERSION_NUMBER"
 658   $1_VERSION_STRING="$LINKER_VERSION_STRING"
 659 
 660   AC_MSG_NOTICE([Using $TOOLCHAIN_TYPE $LINKER_NAME version $LINKER_VERSION_NUMBER @<:@$LINKER_VERSION_STRING@:>@])
 661 ])
 662 
 663 # Detect the core components of the toolchain, i.e. the compilers (CC and CXX),
 664 # preprocessor (CPP and CXXCPP), the linker (LD), the assembler (AS) and the
 665 # archiver (AR). Verify that the compilers are correct according to the
 666 # toolchain type.
 667 AC_DEFUN_ONCE([TOOLCHAIN_DETECT_TOOLCHAIN_CORE],
 668 [
 669   #
 670   # Setup the compilers (CC and CXX)
 671   #
 672   TOOLCHAIN_FIND_COMPILER([CC], [C], $TOOLCHAIN_CC_BINARY)
 673   # Now that we have resolved CC ourself, let autoconf have its go at it
 674   AC_PROG_CC([$CC])
 675 
 676   TOOLCHAIN_FIND_COMPILER([CXX], [C++], $TOOLCHAIN_CXX_BINARY)
 677   # Now that we have resolved CXX ourself, let autoconf have its go at it
 678   AC_PROG_CXX([$CXX])
 679 
 680   # This is the compiler version number on the form X.Y[.Z]
 681   AC_SUBST(CC_VERSION_NUMBER)
 682   AC_SUBST(CXX_VERSION_NUMBER)
 683 
 684   TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS
 685 
 686   if test "x$TOOLCHAIN_MINIMUM_VERSION" != x; then
 687     TOOLCHAIN_CHECK_COMPILER_VERSION(VERSION: $TOOLCHAIN_MINIMUM_VERSION,
 688         IF_OLDER_THAN: [
 689           AC_MSG_WARN([You are using $TOOLCHAIN_TYPE older than $TOOLCHAIN_MINIMUM_VERSION. This is not a supported configuration.])
 690         ]
 691     )
 692   fi
 693 
 694   #
 695   # Setup the preprocessor (CPP and CXXCPP)
 696   #
 697   AC_PROG_CPP
 698   BASIC_FIXUP_EXECUTABLE(CPP)
 699   AC_PROG_CXXCPP
 700   BASIC_FIXUP_EXECUTABLE(CXXCPP)
 701 
 702   #
 703   # Setup the linker (LD)
 704   #
 705   if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
 706     # In the Microsoft toolchain we have a separate LD command "link".
 707     # Make sure we reject /usr/bin/link (as determined in CYGWIN_LINK), which is
 708     # a cygwin program for something completely different.
 709     AC_CHECK_PROG([LD], [link.exe],[link.exe],,, [$CYGWIN_LINK])
 710     BASIC_FIXUP_EXECUTABLE(LD)
 711     # Verify that we indeed succeeded with this trick.
 712     AC_MSG_CHECKING([if the found link.exe is actually the Visual Studio linker])
 713     "$LD" --version > /dev/null
 714     if test $? -eq 0 ; then
 715       AC_MSG_RESULT([no])
 716       AC_MSG_ERROR([This is the Cygwin link tool. Please check your PATH and rerun configure.])
 717     else
 718       AC_MSG_RESULT([yes])
 719     fi
 720     LDCXX="$LD"
 721   else
 722     # All other toolchains use the compiler to link.
 723     LD="$CC"
 724     LDCXX="$CXX"
 725   fi
 726   AC_SUBST(LD)
 727   # FIXME: it should be CXXLD, according to standard (cf CXXCPP)
 728   AC_SUBST(LDCXX)
 729 
 730   TOOLCHAIN_EXTRACT_LD_VERSION([LD], [linker])
 731   TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS
 732 
 733   if test "x$TOOLCHAIN_MINIMUM_LD_VERSION" != x; then
 734     TOOLCHAIN_CHECK_LINKER_VERSION(VERSION: $TOOLCHAIN_MINIMUM_LD_VERSION,
 735         IF_OLDER_THAN: [
 736           AC_MSG_WARN([You are using a linker older than $TOOLCHAIN_MINIMUM_LD_VERSION. This is not a supported configuration.])
 737         ]
 738     )
 739   fi
 740 
 741   #
 742   # Setup the assembler (AS)
 743   #
 744   if test "x$OPENJDK_TARGET_OS" = xsolaris; then
 745     BASIC_PATH_PROGS(AS, as)
 746     BASIC_FIXUP_EXECUTABLE(AS)
 747     if test "x$AS" = x; then
 748       AC_MSG_ERROR([Solaris assembler (as) is required. Please install via "pkg install pkg:/developer/assembler".])
 749     fi
 750   else
 751     # FIXME: is this correct for microsoft?
 752     AS="$CC -c"
 753   fi
 754   AC_SUBST(AS)
 755 
 756   #
 757   # Setup the archiver (AR)
 758   #
 759   if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
 760     # The corresponding ar tool is lib.exe (used to create static libraries)
 761     AC_CHECK_PROG([AR], [lib.exe],[lib.exe],,,)
 762   elif test "x$TOOLCHAIN_TYPE" = xgcc; then
 763     BASIC_CHECK_TOOLS(AR, ar gcc-ar)
 764   else
 765     BASIC_CHECK_TOOLS(AR, ar)
 766   fi
 767   BASIC_FIXUP_EXECUTABLE(AR)
 768 ])
 769 
 770 # Setup additional tools that is considered a part of the toolchain, but not the
 771 # core part. Many of these are highly platform-specific and do not exist,
 772 # and/or are not needed on all platforms.
 773 AC_DEFUN_ONCE([TOOLCHAIN_DETECT_TOOLCHAIN_EXTRA],
 774 [
 775   if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
 776     BASIC_PATH_PROGS(LIPO, lipo)
 777     BASIC_FIXUP_EXECUTABLE(LIPO)
 778     BASIC_REQUIRE_PROGS(OTOOL, otool)
 779     BASIC_FIXUP_EXECUTABLE(OTOOL)
 780     BASIC_REQUIRE_PROGS(INSTALL_NAME_TOOL, install_name_tool)
 781     BASIC_FIXUP_EXECUTABLE(INSTALL_NAME_TOOL)
 782   fi
 783 
 784   if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
 785     AC_CHECK_PROG([MT], [mt.exe], [mt.exe],,, [/usr/bin/mt])
 786     BASIC_FIXUP_EXECUTABLE(MT)
 787     # Setup the resource compiler (RC)
 788     AC_CHECK_PROG([RC], [rc.exe], [rc.exe],,, [/usr/bin/rc])
 789     BASIC_FIXUP_EXECUTABLE(RC)
 790     AC_CHECK_PROG([DUMPBIN], [dumpbin.exe], [dumpbin.exe],,,)
 791     BASIC_FIXUP_EXECUTABLE(DUMPBIN)
 792     # We need to check for 'msbuild.exe' because at the place where we expect to
 793     # find 'msbuild.exe' there's also a directory called 'msbuild' and configure
 794     # won't find the 'msbuild.exe' executable in that case (and the
 795     # 'ac_executable_extensions' is unusable due to performance reasons).
 796     # Notice that we intentionally don't fix up the path to MSBUILD because we
 797     # will call it in a DOS shell during freetype detection on Windows (see
 798     # 'LIB_SETUP_FREETYPE' in "libraries.m4"
 799     AC_CHECK_PROG([MSBUILD], [msbuild.exe], [msbuild.exe],,,)
 800   fi
 801 
 802   if test "x$OPENJDK_TARGET_OS" = xsolaris; then
 803     BASIC_PATH_PROGS(STRIP, strip)
 804     BASIC_FIXUP_EXECUTABLE(STRIP)
 805     BASIC_PATH_PROGS(NM, nm)
 806     BASIC_FIXUP_EXECUTABLE(NM)
 807     BASIC_PATH_PROGS(GNM, gnm)
 808     BASIC_FIXUP_EXECUTABLE(GNM)
 809   elif test "x$OPENJDK_TARGET_OS" != xwindows; then
 810     # FIXME: we should unify this with the solaris case above.
 811     BASIC_CHECK_TOOLS(STRIP, strip)
 812     BASIC_FIXUP_EXECUTABLE(STRIP)
 813     if test "x$TOOLCHAIN_TYPE" = xgcc; then
 814       BASIC_CHECK_TOOLS(NM, nm gcc-nm)
 815     else
 816       BASIC_CHECK_TOOLS(NM, nm)
 817     fi
 818     BASIC_FIXUP_EXECUTABLE(NM)
 819     GNM="$NM"
 820     AC_SUBST(GNM)
 821   fi
 822 
 823   # objcopy is used for moving debug symbols to separate files when
 824   # full debug symbols are enabled.
 825   if test "x$OPENJDK_TARGET_OS" = xsolaris || test "x$OPENJDK_TARGET_OS" = xlinux; then
 826     BASIC_CHECK_TOOLS(OBJCOPY, [gobjcopy objcopy])
 827     # Only call fixup if objcopy was found.
 828     if test -n "$OBJCOPY"; then
 829       BASIC_FIXUP_EXECUTABLE(OBJCOPY)
 830       if test "x$OPENJDK_BUILD_OS" = xsolaris; then
 831         # objcopy prior to 2.21.1 on solaris is broken and is not usable.
 832         # Rewrite objcopy version output to VALID_VERSION or BAD_VERSION.
 833         # - version number is last blank separate word on first line
 834         # - version number formats that have been seen:
 835         #   - <major>.<minor>
 836         #   - <major>.<minor>.<micro>
 837         OBJCOPY_VERSION=`$OBJCOPY --version | $HEAD -n 1`
 838         # The outer [ ] is to prevent m4 from eating the [] in the sed expression.
 839         [ OBJCOPY_VERSION_CHECK=`$ECHO $OBJCOPY_VERSION | $SED -n \
 840               -e 's/.* //' \
 841               -e '/^[01]\./b bad' \
 842               -e '/^2\./{' \
 843               -e '  s/^2\.//' \
 844               -e '  /^[0-9]$/b bad' \
 845               -e '  /^[0-9]\./b bad' \
 846               -e '  /^1[0-9]$/b bad' \
 847               -e '  /^1[0-9]\./b bad' \
 848               -e '  /^20\./b bad' \
 849               -e '  /^21\.0$/b bad' \
 850               -e '  /^21\.0\./b bad' \
 851               -e '}' \
 852               -e ':good' \
 853               -e 's/.*/VALID_VERSION/p' \
 854               -e 'q' \
 855               -e ':bad' \
 856               -e 's/.*/BAD_VERSION/p' \
 857               -e 'q'` ]
 858         if test "x$OBJCOPY_VERSION_CHECK" = xBAD_VERSION; then
 859           OBJCOPY=
 860           AC_MSG_WARN([Ignoring found objcopy since it is broken (prior to 2.21.1). No debug symbols will be generated.])
 861           AC_MSG_NOTICE([objcopy reports version $OBJCOPY_VERSION])
 862           AC_MSG_NOTICE([Note: patch 149063-01 or newer contains the correct Solaris 10 SPARC version])
 863           AC_MSG_NOTICE([Note: patch 149064-01 or newer contains the correct Solaris 10 X86 version])
 864           AC_MSG_NOTICE([Note: Solaris 11 Update 1 contains the correct version])
 865         fi
 866       fi
 867     fi
 868   fi
 869 
 870   BASIC_CHECK_TOOLS(OBJDUMP, [gobjdump objdump])
 871   if test "x$OBJDUMP" != x; then
 872     # Only used for compare.sh; we can live without it. BASIC_FIXUP_EXECUTABLE
 873     # bails if argument is missing.
 874     BASIC_FIXUP_EXECUTABLE(OBJDUMP)
 875   fi
 876 
 877   case $TOOLCHAIN_TYPE in
 878     gcc|clang|solstudio)
 879       BASIC_CHECK_TOOLS(CXXFILT, [c++filt])
 880       BASIC_CHECK_NONEMPTY(CXXFILT)
 881       BASIC_FIXUP_EXECUTABLE(CXXFILT)
 882       ;;
 883   esac
 884 ])
 885 
 886 # Setup the build tools (i.e, the compiler and linker used to build programs
 887 # that should be run on the build platform, not the target platform, as a build
 888 # helper). Since the non-cross-compile case uses the normal, target compilers
 889 # for this, we can only do this after these have been setup.
 890 AC_DEFUN_ONCE([TOOLCHAIN_SETUP_BUILD_COMPILERS],
 891 [
 892   if test "x$COMPILE_TYPE" = "xcross"; then
 893     # Now we need to find a C/C++ compiler that can build executables for the
 894     # build platform. We can't use the AC_PROG_CC macro, since it can only be
 895     # used once. Also, we need to do this without adding a tools dir to the
 896     # path, otherwise we might pick up cross-compilers which don't use standard
 897     # naming.
 898 
 899     OLDPATH="$PATH"
 900 
 901     AC_ARG_WITH(build-devkit, [AS_HELP_STRING([--with-build-devkit],
 902         [Devkit to use for the build platform toolchain])])
 903     if test "x$with_build_devkit" = "xyes"; then
 904       AC_MSG_ERROR([--with-build-devkit must have a value])
 905     elif test -n "$with_build_devkit"; then
 906       if test ! -d "$with_build_devkit"; then
 907         AC_MSG_ERROR([--with-build-devkit points to non existing dir: $with_build_devkit])
 908       else
 909         BASIC_FIXUP_PATH([with_build_devkit])
 910         BUILD_DEVKIT_ROOT="$with_build_devkit"
 911         # Check for a meta data info file in the root of the devkit
 912         if test -f "$BUILD_DEVKIT_ROOT/devkit.info"; then
 913           # Process devkit.info so that existing devkit variables are not
 914           # modified by this
 915           $SED -e "s/^DEVKIT_/BUILD_DEVKIT_/g" \
 916               -e "s/\$DEVKIT_ROOT/\$BUILD_DEVKIT_ROOT/g" \
 917               -e "s/\$host/\$build/g" \
 918               $BUILD_DEVKIT_ROOT/devkit.info \
 919               > $CONFIGURESUPPORT_OUTPUTDIR/build-devkit.info
 920           . $CONFIGURESUPPORT_OUTPUTDIR/build-devkit.info
 921           # This potentially sets the following:
 922           # A descriptive name of the devkit
 923           BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_NAME])
 924           # Corresponds to --with-extra-path
 925           BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_EXTRA_PATH])
 926           # Corresponds to --with-toolchain-path
 927           BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_TOOLCHAIN_PATH])
 928           # Corresponds to --with-sysroot
 929           BASIC_EVAL_DEVKIT_VARIABLE([BUILD_DEVKIT_SYSROOT])
 930           # Skip the Window specific parts
 931         fi
 932 
 933         AC_MSG_CHECKING([for build platform devkit])
 934         if test "x$BUILD_DEVKIT_NAME" != x; then
 935           AC_MSG_RESULT([$BUILD_DEVKIT_NAME in $BUILD_DEVKIT_ROOT])
 936         else
 937           AC_MSG_RESULT([$BUILD_DEVKIT_ROOT])
 938         fi
 939 
 940         BUILD_SYSROOT="$BUILD_DEVKIT_SYSROOT"
 941 
 942          # Fallback default of just /bin if DEVKIT_PATH is not defined
 943         if test "x$BUILD_DEVKIT_TOOLCHAIN_PATH" = x; then
 944           BUILD_DEVKIT_TOOLCHAIN_PATH="$BUILD_DEVKIT_ROOT/bin"
 945         fi
 946         PATH="$BUILD_DEVKIT_TOOLCHAIN_PATH:$BUILD_DEVKIT_EXTRA_PATH"
 947       fi
 948     fi
 949 
 950     # FIXME: we should list the discovered compilers as an exclude pattern!
 951     # If we do that, we can do this detection before POST_DETECTION, and still
 952     # find the build compilers in the tools dir, if needed.
 953     BASIC_REQUIRE_PROGS(BUILD_CC, [cl cc gcc])
 954     BASIC_FIXUP_EXECUTABLE(BUILD_CC)
 955     BASIC_REQUIRE_PROGS(BUILD_CXX, [cl CC g++])
 956     BASIC_FIXUP_EXECUTABLE(BUILD_CXX)
 957     BASIC_PATH_PROGS(BUILD_NM, nm gcc-nm)
 958     BASIC_FIXUP_EXECUTABLE(BUILD_NM)
 959     BASIC_PATH_PROGS(BUILD_AR, ar gcc-ar)
 960     BASIC_FIXUP_EXECUTABLE(BUILD_AR)
 961     BASIC_PATH_PROGS(BUILD_OBJCOPY, objcopy)
 962     BASIC_FIXUP_EXECUTABLE(BUILD_OBJCOPY)
 963     BASIC_PATH_PROGS(BUILD_STRIP, strip)
 964     BASIC_FIXUP_EXECUTABLE(BUILD_STRIP)
 965     # Assume the C compiler is the assembler
 966     BUILD_AS="$BUILD_CC -c"
 967     # Just like for the target compiler, use the compiler as linker
 968     BUILD_LD="$BUILD_CC"
 969     BUILD_LDCXX="$BUILD_CXX"
 970 
 971     PATH="$OLDPATH"
 972 
 973     TOOLCHAIN_EXTRACT_COMPILER_VERSION(BUILD_CC, [BuildC])
 974     TOOLCHAIN_EXTRACT_COMPILER_VERSION(BUILD_CXX, [BuildC++])
 975     TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS([BUILD_], [OPENJDK_BUILD_])
 976     TOOLCHAIN_EXTRACT_LD_VERSION(BUILD_LD, [build linker])
 977     TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS([BUILD_], [OPENJDK_BUILD_])
 978   else
 979     # If we are not cross compiling, use the normal target compilers for
 980     # building the build platform executables.
 981     BUILD_CC="$CC"
 982     BUILD_CXX="$CXX"
 983     BUILD_LD="$LD"
 984     BUILD_LDCXX="$LDCXX"
 985     BUILD_NM="$NM"
 986     BUILD_AS="$AS"
 987     BUILD_OBJCOPY="$OBJCOPY"
 988     BUILD_STRIP="$STRIP"
 989     BUILD_AR="$AR"
 990 
 991     TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS([], [OPENJDK_BUILD_])
 992     TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS([BUILD_], [OPENJDK_BUILD_])
 993   fi
 994 
 995   AC_SUBST(BUILD_CC)
 996   AC_SUBST(BUILD_CXX)
 997   AC_SUBST(BUILD_LD)
 998   AC_SUBST(BUILD_LDCXX)
 999   AC_SUBST(BUILD_NM)
1000   AC_SUBST(BUILD_AS)
1001   AC_SUBST(BUILD_AR)
1002 ])
1003 
1004 # Do some additional checks on the detected tools.
1005 AC_DEFUN_ONCE([TOOLCHAIN_MISC_CHECKS],
1006 [
1007   # Check for extra potential brokenness.
1008   if test  "x$TOOLCHAIN_TYPE" = xmicrosoft; then
1009     # On Windows, double-check that we got the right compiler.
1010     CC_VERSION_OUTPUT=`$CC 2>&1 | $HEAD -n 1 | $TR -d '\r'`
1011     COMPILER_CPU_TEST=`$ECHO $CC_VERSION_OUTPUT | $SED -n "s/^.* \(.*\)$/\1/p"`
1012     if test "x$OPENJDK_TARGET_CPU" = "xx86"; then
1013       if test "x$COMPILER_CPU_TEST" != "x80x86" -a "x$COMPILER_CPU_TEST" != "xx86"; then
1014         AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "80x86" or "x86".])
1015       fi
1016     elif test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
1017       if test "x$COMPILER_CPU_TEST" != "xx64"; then
1018         AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "x64".])
1019       fi
1020     fi
1021   fi
1022 
1023   if test "x$TOOLCHAIN_TYPE" = xgcc; then
1024     # If this is a --hash-style=gnu system, use --hash-style=both, why?
1025     HAS_GNU_HASH=`$CC -dumpspecs 2>/dev/null | $GREP 'hash-style=gnu'`
1026     # This is later checked when setting flags.
1027   fi
1028 
1029   if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
1030     # Check if linker has -z noexecstack.
1031     HAS_NOEXECSTACK=`$CC -Wl,--help 2>/dev/null | $GREP 'z noexecstack'`
1032     # This is later checked when setting flags.
1033   fi
1034 
1035   # Setup hotspot lecagy names for toolchains
1036   HOTSPOT_TOOLCHAIN_TYPE=$TOOLCHAIN_TYPE
1037   if test "x$TOOLCHAIN_TYPE" = xclang; then
1038     HOTSPOT_TOOLCHAIN_TYPE=gcc
1039   elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
1040     HOTSPOT_TOOLCHAIN_TYPE=visCPP
1041   fi
1042   AC_SUBST(HOTSPOT_TOOLCHAIN_TYPE)
1043 ])
1044 
1045 # Setup the JTReg Regression Test Harness.
1046 AC_DEFUN_ONCE([TOOLCHAIN_SETUP_JTREG],
1047 [
1048   AC_ARG_WITH(jtreg, [AS_HELP_STRING([--with-jtreg],
1049       [Regression Test Harness @<:@probed@:>@])])
1050 
1051   if test "x$with_jtreg" = xno; then
1052     # jtreg disabled
1053     AC_MSG_CHECKING([for jtreg test harness])
1054     AC_MSG_RESULT([no, disabled])
1055   elif test "x$with_jtreg" != xyes && test "x$with_jtreg" != x; then
1056     # An explicit path is specified, use it.
1057     JT_HOME="$with_jtreg"
1058     BASIC_FIXUP_PATH([JT_HOME])
1059     if test ! -d "$JT_HOME"; then
1060       AC_MSG_ERROR([jtreg home directory from --with-jtreg=$with_jtreg does not exist])
1061     fi
1062 
1063     if test ! -e "$JT_HOME/lib/jtreg.jar"; then
1064       AC_MSG_ERROR([jtreg home directory from --with-jtreg=$with_jtreg is not a valid jtreg home])
1065     fi
1066 
1067     JTREGEXE="$JT_HOME/bin/jtreg"
1068     if test ! -x "$JTREGEXE"; then
1069       AC_MSG_ERROR([jtreg home directory from --with-jtreg=$with_jtreg does not contain valid jtreg executable])
1070     fi
1071 
1072     AC_MSG_CHECKING([for jtreg test harness])
1073     AC_MSG_RESULT([$JT_HOME])
1074   else
1075     # Try to locate jtreg
1076     if test "x$JT_HOME" != x; then
1077       # JT_HOME set in environment, use it
1078       if test ! -d "$JT_HOME"; then
1079         AC_MSG_WARN([Ignoring JT_HOME pointing to invalid directory: $JT_HOME])
1080         JT_HOME=
1081       else
1082         if test ! -e "$JT_HOME/lib/jtreg.jar"; then
1083           AC_MSG_WARN([Ignoring JT_HOME which is not a valid jtreg home: $JT_HOME])
1084           JT_HOME=
1085         elif test ! -x "$JT_HOME/bin/jtreg"; then
1086           AC_MSG_WARN([Ignoring JT_HOME which does not contain valid jtreg executable: $JT_HOME])
1087           JT_HOME=
1088         else
1089           JTREGEXE="$JT_HOME/bin/jtreg"
1090           AC_MSG_NOTICE([Located jtreg using JT_HOME from environment])
1091         fi
1092       fi
1093     fi
1094 
1095     if test "x$JT_HOME" = x; then
1096       # JT_HOME is not set in environment, or was deemed invalid.
1097       # Try to find jtreg on path
1098       BASIC_PATH_PROGS(JTREGEXE, jtreg)
1099       if test "x$JTREGEXE" != x; then
1100         # That's good, now try to derive JT_HOME
1101         JT_HOME=`(cd $($DIRNAME $JTREGEXE)/.. && pwd)`
1102         if test ! -e "$JT_HOME/lib/jtreg.jar"; then
1103           AC_MSG_WARN([Ignoring jtreg from path since a valid jtreg home cannot be found])
1104           JT_HOME=
1105           JTREGEXE=
1106         else
1107           AC_MSG_NOTICE([Located jtreg using jtreg executable in path])
1108         fi
1109       fi
1110     fi
1111 
1112     AC_MSG_CHECKING([for jtreg test harness])
1113     if test "x$JT_HOME" != x; then
1114       AC_MSG_RESULT([$JT_HOME])
1115     else
1116       AC_MSG_RESULT([no, not found])
1117 
1118       if test "x$with_jtreg" = xyes; then
1119         AC_MSG_ERROR([--with-jtreg was specified, but no jtreg found.])
1120       fi
1121     fi
1122   fi
1123 
1124   BASIC_FIXUP_EXECUTABLE(JTREGEXE)
1125   BASIC_FIXUP_PATH(JT_HOME)
1126   AC_SUBST(JT_HOME)
1127   AC_SUBST(JTREGEXE)
1128 ])
1129 
1130 # Setup the JIB dependency resolver
1131 AC_DEFUN_ONCE([TOOLCHAIN_SETUP_JIB],
1132 [
1133   AC_ARG_WITH(jib, [AS_HELP_STRING([--with-jib],
1134       [Jib dependency management tool @<:@not used@:>@])])
1135 
1136   if test "x$with_jib" = xno || test "x$with_jib" = x; then
1137     # jib disabled
1138     AC_MSG_CHECKING([for jib])
1139     AC_MSG_RESULT(no)
1140   elif test "x$with_jib" = xyes; then
1141     AC_MSG_ERROR([Must supply a value to --with-jib])
1142   else
1143     JIB_HOME="${with_jib}"
1144     AC_MSG_CHECKING([for jib])
1145     AC_MSG_RESULT(${JIB_HOME})
1146     if test ! -d "${JIB_HOME}"; then
1147       AC_MSG_ERROR([--with-jib must be a directory])
1148     fi
1149     JIB_JAR=$(ls ${JIB_HOME}/lib/jib-*.jar)
1150     if test ! -f "${JIB_JAR}"; then
1151       AC_MSG_ERROR([Could not find jib jar file in ${JIB_HOME}])
1152     fi
1153   fi
1154 
1155   AC_SUBST(JIB_HOME)
1156 ])