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toolchain.m4 
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#
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# Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved.
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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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#
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# This code is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 only, as
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# published by the Free Software Foundation.  Oracle designates this
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# particular file as subject to the "Classpath" exception as provided
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# by Oracle in the LICENSE file that accompanied this code.
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#
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# This code is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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# version 2 for more details (a copy is included in the LICENSE file that
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# accompanied this code).
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#
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# You should have received a copy of the GNU General Public License version
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# 2 along with this work; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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# or visit www.oracle.com if you need additional information or have any
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# questions.
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#
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26
########################################################################
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# This file is responsible for detecting, verifying and setting up the
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# toolchain, i.e. the compiler, linker and related utilities. It will setup
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# proper paths to the binaries, but it will not setup any flags.
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#
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# The binaries used is determined by the toolchain type, which is the family of
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# compilers and related tools that are used.
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########################################################################
34

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m4_include([toolchain_microsoft.m4])
36

37
# All valid toolchains, regardless of platform (used by help.m4)
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VALID_TOOLCHAINS_all="gcc clang microsoft"
39

40
# These toolchains are valid on different platforms
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VALID_TOOLCHAINS_linux="gcc clang"
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VALID_TOOLCHAINS_macosx="clang"
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VALID_TOOLCHAINS_aix="clang"
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VALID_TOOLCHAINS_windows="microsoft"
45

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# Toolchain descriptions
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TOOLCHAIN_DESCRIPTION_clang="clang/LLVM"
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TOOLCHAIN_DESCRIPTION_gcc="GNU Compiler Collection"
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TOOLCHAIN_DESCRIPTION_microsoft="Microsoft Visual Studio"
50

51
# Minimum supported versions, empty means unspecified
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TOOLCHAIN_MINIMUM_VERSION_clang="13.0"
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TOOLCHAIN_MINIMUM_VERSION_gcc="10.0"
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TOOLCHAIN_MINIMUM_VERSION_microsoft="19.28.0.0" # VS2019 16.8, aka MSVC 14.28
55

56
# Minimum supported linker versions, empty means unspecified
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TOOLCHAIN_MINIMUM_LD_VERSION_gcc="2.18"
58

59
# Prepare the system so that TOOLCHAIN_CHECK_COMPILER_VERSION can be called.
60
# Must have CC_VERSION_NUMBER and CXX_VERSION_NUMBER.
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# $1 - optional variable prefix for compiler and version variables (BUILD_)
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# $2 - optional variable prefix for comparable variable (OPENJDK_BUILD_)
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# $3 - optional human readable description for the type of compilers ("build " or "")
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AC_DEFUN([TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS],
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[
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  if test "x[$]$1CC_VERSION_NUMBER" != "x[$]$1CXX_VERSION_NUMBER"; then
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    AC_MSG_WARN([The $3C and C++ compilers have different version numbers, [$]$1CC_VERSION_NUMBER vs [$]$1CXX_VERSION_NUMBER.])
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    AC_MSG_WARN([This typically indicates a broken setup, and is not supported])
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  fi
70

71
  # We only check CC_VERSION_NUMBER since we assume CXX_VERSION_NUMBER is equal.
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  if [ [[ "[$]$1CC_VERSION_NUMBER" =~ (.*\.){4} ]] ]; then
73
    AC_MSG_WARN([C compiler version number has more than four parts (W.X.Y.Z): [$]$1CC_VERSION_NUMBER. Comparisons might be wrong.])
74
  fi
75

76
  if [ [[  "[$]$1CC_VERSION_NUMBER" =~ [0-9]{6} ]] ]; then
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    AC_MSG_WARN([C compiler version number has a part larger than 99999: [$]$1CC_VERSION_NUMBER. Comparisons might be wrong.])
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  fi
79

80
  $2COMPARABLE_ACTUAL_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "[$]$1CC_VERSION_NUMBER"`
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])
82

83
# Check if the configured compiler (C and C++) is of a specific version or
84
# newer. TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS must have been called before.
85
#
86
# Arguments:
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#   VERSION:   The version string to check against the found version
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#   IF_AT_LEAST:   block to run if the compiler is at least this version (>=)
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#   IF_OLDER_THAN:   block to run if the compiler is older than this version (<)
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#   PREFIX:   Optional variable prefix for compiler to compare version for (OPENJDK_BUILD_)
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UTIL_DEFUN_NAMED([TOOLCHAIN_CHECK_COMPILER_VERSION],
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    [*VERSION PREFIX IF_AT_LEAST IF_OLDER_THAN], [$@],
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[
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  # Need to assign to a variable since m4 is blocked from modifying parts in [].
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  REFERENCE_VERSION=ARG_VERSION
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97
  if [ [[ "$REFERENCE_VERSION" =~ (.*\.){4} ]] ]; then
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    AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only four parts (W.X.Y.Z) is supported])
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  fi
100

101
  if [ [[ "$REFERENCE_VERSION" =~ [0-9]{6} ]] ]; then
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    AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only parts < 99999 is supported])
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  fi
104

105
  # Version comparison method inspired by http://stackoverflow.com/a/24067243
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  COMPARABLE_REFERENCE_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "$REFERENCE_VERSION"`
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108
  if test [$]ARG_PREFIX[COMPARABLE_ACTUAL_VERSION] -ge $COMPARABLE_REFERENCE_VERSION ; then
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    :
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    ARG_IF_AT_LEAST
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  else
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    :
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    ARG_IF_OLDER_THAN
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  fi
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])
116

117
# Prepare the system so that TOOLCHAIN_CHECK_COMPILER_VERSION can be called.
118
# Must have LD_VERSION_NUMBER.
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# $1 - optional variable prefix for compiler and version variables (BUILD_)
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# $2 - optional variable prefix for comparable variable (OPENJDK_BUILD_)
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AC_DEFUN([TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS],
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[
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  if [ [[ "[$]$1LD_VERSION_NUMBER" =~ (.*\.){4} ]] ]; then
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    AC_MSG_WARN([Linker version number has more than four parts (W.X.Y.Z): [$]$1LD_VERSION_NUMBER. Comparisons might be wrong.])
125
  fi
126

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  if [ [[  "[$]$1LD_VERSION_NUMBER" =~ [0-9]{6} ]] ]; then
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    AC_MSG_WARN([Linker version number has a part larger than 99999: [$]$1LD_VERSION_NUMBER. Comparisons might be wrong.])
129
  fi
130

131
  $2COMPARABLE_ACTUAL_LD_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "[$]$1LD_VERSION_NUMBER"`
132
])
133

134
# Check if the configured linker is of a specific version or
135
# newer. TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS must have been called before.
136
#
137
# Arguments:
138
#   VERSION:   The version string to check against the found version
139
#   IF_AT_LEAST:   block to run if the compiler is at least this version (>=)
140
#   IF_OLDER_THAN:   block to run if the compiler is older than this version (<)
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#   PREFIX:   Optional variable prefix for compiler to compare version for (OPENJDK_BUILD_)
142
UTIL_DEFUN_NAMED([TOOLCHAIN_CHECK_LINKER_VERSION],
143
    [*VERSION PREFIX IF_AT_LEAST IF_OLDER_THAN], [$@],
144
[
145
  # Need to assign to a variable since m4 is blocked from modifying parts in [].
146
  REFERENCE_VERSION=ARG_VERSION
147

148
  if [ [[ "$REFERENCE_VERSION" =~ (.*\.){4} ]] ]; then
149
    AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only four parts (W.X.Y.Z) is supported])
150
  fi
151

152
  if [ [[ "$REFERENCE_VERSION" =~ [0-9]{6} ]] ]; then
153
    AC_MSG_ERROR([Internal error: Cannot compare to ARG_VERSION, only parts < 99999 is supported])
154
  fi
155

156
  # Version comparison method inspired by http://stackoverflow.com/a/24067243
157
  COMPARABLE_REFERENCE_VERSION=`$AWK -F. '{ printf("%05d%05d%05d%05d\n", [$]1, [$]2, [$]3, [$]4) }' <<< "$REFERENCE_VERSION"`
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159
  if test [$]ARG_PREFIX[COMPARABLE_ACTUAL_LD_VERSION] -ge $COMPARABLE_REFERENCE_VERSION ; then
160
    :
161
    ARG_IF_AT_LEAST
162
  else
163
    :
164
    ARG_IF_OLDER_THAN
165
  fi
166
])
167

168
# Setup a number of variables describing how native output files are
169
# named on this platform/toolchain.
170
AC_DEFUN([TOOLCHAIN_SETUP_FILENAME_PATTERNS],
171
[
172
  # Define filename patterns
173
  if test "x$OPENJDK_TARGET_OS" = xwindows; then
174
    LIBRARY_PREFIX=
175
    SHARED_LIBRARY_SUFFIX='.dll'
176
    STATIC_LIBRARY_SUFFIX='.lib'
177
    OBJ_SUFFIX='.obj'
178
    EXECUTABLE_SUFFIX='.exe'
179
  else
180
    LIBRARY_PREFIX=lib
181
    if test "x$OPENJDK_TARGET_OS" = xmacosx; then
182
      SHARED_LIBRARY_SUFFIX='.dylib'
183
    else
184
      SHARED_LIBRARY_SUFFIX='.so'
185
    fi
186
    STATIC_LIBRARY_SUFFIX='.a'
187
    OBJ_SUFFIX='.o'
188
    EXECUTABLE_SUFFIX=''
189
  fi
190

191
  AC_SUBST(LIBRARY_PREFIX)
192
  AC_SUBST(SHARED_LIBRARY_SUFFIX)
193
  AC_SUBST(STATIC_LIBRARY_SUFFIX)
194
  AC_SUBST(OBJ_SUFFIX)
195
  AC_SUBST(EXECUTABLE_SUFFIX)
196
])
197

198
# Determine which toolchain type to use, and make sure it is valid for this
199
# platform. Setup various information about the selected toolchain.
200
AC_DEFUN_ONCE([TOOLCHAIN_DETERMINE_TOOLCHAIN_TYPE],
201
[
202
  AC_ARG_WITH(toolchain-type, [AS_HELP_STRING([--with-toolchain-type],
203
      [the toolchain type (or family) to use, use '--help' to show possible values @<:@platform dependent@:>@])])
204

205
  # Linux x86_64 needs higher binutils after 8265783
206
  # (this really is a dependency on as version, but we take ld as a check for a general binutils version)
207
  if test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
208
    TOOLCHAIN_MINIMUM_LD_VERSION_gcc="2.25"
209
  fi
210

211
  # Use indirect variable referencing
212
  toolchain_var_name=VALID_TOOLCHAINS_$OPENJDK_BUILD_OS
213
  VALID_TOOLCHAINS=${!toolchain_var_name}
214

215
  # First toolchain type in the list is the default
216
  DEFAULT_TOOLCHAIN=${VALID_TOOLCHAINS%% *}
217

218
  if test "x$with_toolchain_type" = xlist; then
219
    # List all toolchains
220
    AC_MSG_NOTICE([The following toolchains are valid on this platform:])
221
    for toolchain in $VALID_TOOLCHAINS; do
222
      toolchain_var_name=TOOLCHAIN_DESCRIPTION_$toolchain
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      TOOLCHAIN_DESCRIPTION=${!toolchain_var_name}
224
      $PRINTF "  %-10s  %s\n" $toolchain "$TOOLCHAIN_DESCRIPTION"
225
    done
226

227
    exit 0
228
  elif test "x$with_toolchain_type" != x; then
229
    # User override; check that it is valid
230
    if test "x${VALID_TOOLCHAINS/$with_toolchain_type/}" = "x${VALID_TOOLCHAINS}"; then
231
      AC_MSG_NOTICE([Toolchain type $with_toolchain_type is not valid on this platform.])
232
      AC_MSG_NOTICE([Valid toolchains: $VALID_TOOLCHAINS.])
233
      AC_MSG_ERROR([Cannot continue.])
234
    fi
235
    TOOLCHAIN_TYPE=$with_toolchain_type
236
  else
237
    # No flag given, use default
238
    TOOLCHAIN_TYPE=$DEFAULT_TOOLCHAIN
239
  fi
240
  AC_SUBST(TOOLCHAIN_TYPE)
241

242
  TOOLCHAIN_CC_BINARY_clang="ibm-clang_r clang"
243
  TOOLCHAIN_CC_BINARY_gcc="gcc"
244
  TOOLCHAIN_CC_BINARY_microsoft="cl"
245

246
  TOOLCHAIN_CXX_BINARY_clang="ibm-clang++_r clang++"
247
  TOOLCHAIN_CXX_BINARY_gcc="g++"
248
  TOOLCHAIN_CXX_BINARY_microsoft="cl"
249

250
  # Use indirect variable referencing
251
  toolchain_var_name=TOOLCHAIN_DESCRIPTION_$TOOLCHAIN_TYPE
252
  TOOLCHAIN_DESCRIPTION=${!toolchain_var_name}
253
  toolchain_var_name=TOOLCHAIN_MINIMUM_VERSION_$TOOLCHAIN_TYPE
254
  TOOLCHAIN_MINIMUM_VERSION=${!toolchain_var_name}
255
  toolchain_var_name=TOOLCHAIN_MINIMUM_LD_VERSION_$TOOLCHAIN_TYPE
256
  TOOLCHAIN_MINIMUM_LD_VERSION=${!toolchain_var_name}
257
  toolchain_var_name=TOOLCHAIN_CC_BINARY_$TOOLCHAIN_TYPE
258
  TOOLCHAIN_CC_BINARY=${!toolchain_var_name}
259
  toolchain_var_name=TOOLCHAIN_CXX_BINARY_$TOOLCHAIN_TYPE
260
  TOOLCHAIN_CXX_BINARY=${!toolchain_var_name}
261

262
  TOOLCHAIN_SETUP_FILENAME_PATTERNS
263

264
  if test "x$TOOLCHAIN_TYPE" = "x$DEFAULT_TOOLCHAIN"; then
265
    AC_MSG_NOTICE([Using default toolchain $TOOLCHAIN_TYPE ($TOOLCHAIN_DESCRIPTION)])
266
  else
267
    AC_MSG_NOTICE([Using user selected toolchain $TOOLCHAIN_TYPE ($TOOLCHAIN_DESCRIPTION). Default toolchain is $DEFAULT_TOOLCHAIN.])
268
  fi
269
])
270

271
# Before we start detecting the toolchain executables, we might need some
272
# special setup, e.g. additional paths etc.
273
AC_DEFUN_ONCE([TOOLCHAIN_PRE_DETECTION],
274
[
275
  # Store the CFLAGS etc passed to the configure script.
276
  ORG_CFLAGS="$CFLAGS"
277
  ORG_CXXFLAGS="$CXXFLAGS"
278

279
  # autoconf magic only relies on PATH, so update it if tools dir is specified
280
  OLD_PATH="$PATH"
281

282
  if test "x$OPENJDK_BUILD_OS" = "xmacosx"; then
283
    if test "x$XCODEBUILD" != x; then
284
      XCODE_VERSION_OUTPUT=`"$XCODEBUILD" -version 2> /dev/null | $HEAD -n 1`
285
      $ECHO "$XCODE_VERSION_OUTPUT" | $GREP "^Xcode " > /dev/null
286
      if test $? -ne 0; then
287
        AC_MSG_NOTICE([xcodebuild -version output: $XCODE_VERSION_OUTPUT])
288
        AC_MSG_ERROR([Failed to determine Xcode version])
289
      fi
290

291
      # For Xcode, we set the Xcode version as TOOLCHAIN_VERSION
292
      TOOLCHAIN_VERSION=`$ECHO $XCODE_VERSION_OUTPUT | $CUT -f 2 -d ' '`
293
      TOOLCHAIN_DESCRIPTION="$TOOLCHAIN_DESCRIPTION from Xcode $TOOLCHAIN_VERSION"
294
    fi
295
  fi
296
  AC_SUBST(TOOLCHAIN_VERSION)
297

298
  # Finally prepend TOOLCHAIN_PATH to the PATH, to allow --with-tools-dir to
299
  # override all other locations.
300
  if test "x$TOOLCHAIN_PATH" != x; then
301
    export PATH=$TOOLCHAIN_PATH:$PATH
302
  fi
303
])
304

305
# Restore path, etc
306
AC_DEFUN_ONCE([TOOLCHAIN_POST_DETECTION],
307
[
308
  # Restore old path, except for the microsoft toolchain, which requires the
309
  # toolchain path to remain in place. Otherwise the compiler will not work in
310
  # some siutations in later configure checks.
311
  if test "x$TOOLCHAIN_TYPE" != "xmicrosoft"; then
312
    PATH="$OLD_PATH"
313
  fi
314

315
  # Restore the flags to the user specified values.
316
  # This is necessary since AC_PROG_CC defaults CFLAGS to "-g -O2"
317
  CFLAGS="$ORG_CFLAGS"
318
  CXXFLAGS="$ORG_CXXFLAGS"
319

320
  # filter out some unwanted additions autoconf may add to CXX; we saw this on macOS with autoconf 2.72
321
  UTIL_GET_NON_MATCHING_VALUES(cxx_filtered, $CXX, -std=c++11 -std=gnu++11)
322
  CXX="$cxx_filtered"
323
])
324

325
# Check if a compiler is of the toolchain type we expect, and save the version
326
# information from it. If the compiler does not match the expected type,
327
# this function will abort using AC_MSG_ERROR. If it matches, the version will
328
# be stored in CC_VERSION_NUMBER/CXX_VERSION_NUMBER (as a dotted number), and
329
# the full version string in CC_VERSION_STRING/CXX_VERSION_STRING.
330
#
331
# $1 = compiler to test (CC or CXX)
332
# $2 = human readable name of compiler (C or C++)
333
AC_DEFUN([TOOLCHAIN_EXTRACT_COMPILER_VERSION],
334
[
335
  COMPILER=[$]$1
336
  COMPILER_NAME=$2
337

338
  if test  "x$TOOLCHAIN_TYPE" = xmicrosoft; then
339
    # There is no specific version flag, but all output starts with a version string.
340
    # First line typically looks something like:
341
    # Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.40219.01 for 80x86
342
    # but the compiler name may vary depending on locale.
343
    COMPILER_VERSION_OUTPUT=`$COMPILER 2>&1 1>/dev/null | $HEAD -n 1 | $TR -d '\r'`
344
    # Check that this is likely to be Microsoft CL.EXE.
345
    $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "Microsoft" > /dev/null
346
    if test $? -ne 0; then
347
      AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
348
      AC_MSG_NOTICE([The result from running it was: "$COMPILER_VERSION_OUTPUT"])
349
      AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
350
    fi
351
    # Collapse compiler output into a single line
352
    COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT`
353
    COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
354
        $SED -e 's/^.*ersion.\(@<:@1-9@:>@@<:@0-9.@:>@*\) .*$/\1/'`
355
  elif test  "x$TOOLCHAIN_TYPE" = xgcc; then
356
    # gcc --version output typically looks like
357
    #     gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
358
    #     Copyright (C) 2013 Free Software Foundation, Inc.
359
    #     This is free software; see the source for copying conditions.  There is NO
360
    #     warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
361
    COMPILER_VERSION_OUTPUT=`$COMPILER --version 2>&1`
362
    # Check that this is likely to be GCC.
363
    $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "Free Software Foundation" > /dev/null
364
    if test $? -ne 0; then
365
      AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
366
      AC_MSG_NOTICE([The result from running with --version was: "$COMPILER_VERSION"])
367
      AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
368
    fi
369
    # Remove Copyright and legalese from version string, and
370
    # collapse into a single line
371
    COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT | \
372
        $SED -e 's/ *Copyright .*//'`
373
    COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
374
        $SED -e 's/^.* \(@<:@1-9@:>@<:@0-9@:>@*\.@<:@0-9.@:>@*\)@<:@^0-9.@:>@.*$/\1/'`
375
  elif test  "x$TOOLCHAIN_TYPE" = xclang; then
376
    # clang --version output typically looks like
377
    #    Apple clang version 15.0.0 (clang-1500.3.9.4)
378
    #    Target: arm64-apple-darwin23.2.0
379
    #    Thread model: posix
380
    #    InstalledDir: /Library/Developer/CommandLineTools/usr/bin
381
    # or
382
    #    clang version 10.0.0-4ubuntu1
383
    #    Target: x86_64-pc-linux-gnu
384
    #    Thread model: posix
385
    #    InstalledDir: /usr/bin
386
    #    Target: x86_64-pc-linux-gnu
387
    #    Thread model: posix
388
    # or
389
    #    IBM Open XL C/C++ for AIX 17.1.0 (5725-C72, 5765-J18), clang version 13.0.0
390
    #    Target: powerpc-ibm-aix7.2.0.0
391
    #    Thread model: posix
392
    #    InstalledDir: /opt/IBM/openxlC/17.1.0/bin
393
    COMPILER_VERSION_OUTPUT=`$COMPILER --version 2>&1`
394
    # Check that this is likely to be clang
395
    $ECHO "$COMPILER_VERSION_OUTPUT" | $GREP "clang" > /dev/null
396
    if test $? -ne 0; then
397
      AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required $TOOLCHAIN_TYPE compiler.])
398
      AC_MSG_NOTICE([The result from running with --version was: "$COMPILER_VERSION_OUTPUT"])
399
      AC_MSG_ERROR([A $TOOLCHAIN_TYPE compiler is required. Try setting --with-tools-dir.])
400
    fi
401
    # Remove "Thread model:" and further details from the version string, and
402
    # collapse into a single line
403
    COMPILER_VERSION_STRING=`$ECHO $COMPILER_VERSION_OUTPUT | \
404
        $SED -e 's/ *Thread model: .*//'`
405
    COMPILER_VERSION_NUMBER=`$ECHO $COMPILER_VERSION_OUTPUT | \
406
        $SED -e 's/^.*clang version \(@<:@1-9@:>@@<:@0-9.@:>@*\).*$/\1/'`
407
  else
408
      AC_MSG_ERROR([Unknown toolchain type $TOOLCHAIN_TYPE.])
409
  fi
410
  # This sets CC_VERSION_NUMBER or CXX_VERSION_NUMBER. (This comment is a grep marker)
411
  $1_VERSION_NUMBER="$COMPILER_VERSION_NUMBER"
412
  # This sets CC_VERSION_STRING or CXX_VERSION_STRING. (This comment is a grep marker)
413
  $1_VERSION_STRING="$COMPILER_VERSION_STRING"
414

415
  AC_MSG_NOTICE([Using $TOOLCHAIN_TYPE $COMPILER_NAME compiler version $COMPILER_VERSION_NUMBER @<:@$COMPILER_VERSION_STRING@:>@])
416
])
417

418
# Try to locate the given C or C++ compiler in the path, or otherwise.
419
#
420
# $1 = compiler to test (CC or CXX)
421
# $2 = human readable name of compiler (C or C++)
422
# $3 = compiler name to search for
423
AC_DEFUN([TOOLCHAIN_FIND_COMPILER],
424
[
425
  COMPILER_NAME=$2
426
  SEARCH_LIST="$3"
427

428
  if test "x[$]$1" != x; then
429
    # User has supplied compiler name already, always let that override.
430
    AC_MSG_NOTICE([Will use user supplied compiler $1=[$]$1])
431
    if test "x`basename [$]$1`" = "x[$]$1"; then
432
      # A command without a complete path is provided, search $PATH.
433

434
      UTIL_LOOKUP_PROGS(POTENTIAL_$1, [$]$1)
435
      if test "x$POTENTIAL_$1" != x; then
436
        $1=$POTENTIAL_$1
437
      else
438
        AC_MSG_ERROR([User supplied compiler $1=[$]$1 could not be found])
439
      fi
440
    else
441
      # Otherwise it might already be a complete path
442
      if test ! -x "[$]$1"; then
443
        AC_MSG_ERROR([User supplied compiler $1=[$]$1 does not exist])
444
      fi
445
    fi
446
  else
447
    # No user supplied value. Locate compiler ourselves.
448

449
    # If we are cross compiling, assume cross compilation tools follows the
450
    # cross compilation standard where they are prefixed with the autoconf
451
    # standard name for the target. For example the binary
452
    # i686-sun-solaris2.10-gcc will cross compile for i686-sun-solaris2.10.
453
    # If we are not cross compiling, then the default compiler name will be
454
    # used.
455

456
    UTIL_LOOKUP_TOOLCHAIN_PROGS(POTENTIAL_$1, $SEARCH_LIST)
457
    if test "x$POTENTIAL_$1" != x; then
458
      $1=$POTENTIAL_$1
459
    else
460
      HELP_MSG_MISSING_DEPENDENCY([devkit])
461
      AC_MSG_ERROR([Could not find a $COMPILER_NAME compiler. $HELP_MSG])
462
    fi
463
  fi
464

465
  # Now we have a compiler binary in $1. Make sure it's okay.
466
  TEST_COMPILER="[$]$1"
467

468
  AC_MSG_CHECKING([resolved symbolic links for $1])
469
  SYMLINK_ORIGINAL="$TEST_COMPILER"
470
  UTIL_REMOVE_SYMBOLIC_LINKS(SYMLINK_ORIGINAL)
471
  if test "x$TEST_COMPILER" = "x$SYMLINK_ORIGINAL"; then
472
    AC_MSG_RESULT([no symlink])
473
  else
474
    AC_MSG_RESULT([$SYMLINK_ORIGINAL])
475

476
    # We can't handle ccache by gcc wrappers, since we need to know if we're
477
    # using ccache. Instead ccache usage must be controlled by a configure option.
478
    COMPILER_BASENAME=`$BASENAME "$SYMLINK_ORIGINAL"`
479
    if test "x$COMPILER_BASENAME" = "xccache"; then
480
      AC_MSG_NOTICE([Please use --enable-ccache instead of providing a wrapped compiler.])
481
      AC_MSG_ERROR([$TEST_COMPILER is a symbolic link to ccache. This is not supported.])
482
    fi
483
  fi
484

485
  TOOLCHAIN_EXTRACT_COMPILER_VERSION([$1], [$COMPILER_NAME])
486
])
487

488
# Retrieve the linker version number and store it in LD_VERSION_NUMBER
489
# (as a dotted number), and
490
# the full version string in LD_VERSION_STRING.
491
#
492
# $1 = linker to test (LD or BUILD_LD)
493
# $2 = human readable name of linker (Linker or BuildLinker)
494
AC_DEFUN([TOOLCHAIN_EXTRACT_LD_VERSION],
495
[
496
  LINKER=[$]$1
497
  LINKER_NAME="$2"
498

499
  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
500
    # There is no specific version flag, but all output starts with a version string.
501
    # First line typically looks something like:
502
    #   Microsoft (R) Incremental Linker Version 12.00.31101.0
503
    LINKER_VERSION_STRING=`$LINKER 2>&1 | $HEAD -n 1 | $TR -d '\r'`
504
    # Extract version number
505
    [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
506
        $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]
507
  elif test  "x$TOOLCHAIN_TYPE" = xgcc; then
508
    # gcc -Wl,-version output typically looks like:
509
    #   GNU ld (GNU Binutils for Ubuntu) 2.26.1
510
    #   Copyright (C) 2015 Free Software Foundation, Inc.
511
    #   This program is free software; [...]
512
    # If using gold it will look like:
513
    #   GNU gold (GNU Binutils 2.30) 1.15
514
    LINKER_VERSION_STRING=`$LINKER -Wl,--version 2> /dev/null | $HEAD -n 1`
515
    # Extract version number
516
    if [ [[ "$LINKER_VERSION_STRING" == *gold* ]] ]; then
517
      [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
518
          $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*) .*/\1/'` ]
519
    else
520
      [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
521
          $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]
522
    fi
523
  elif test  "x$TOOLCHAIN_TYPE" = xclang; then
524
    # clang -Wl,-v output typically looks like
525
    #   @(#)PROGRAM:ld  PROJECT:ld64-305
526
    #   configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em (tvOS)
527
    #   Library search paths: [...]
528
    # or
529
    #   GNU ld (GNU Binutils for Ubuntu) 2.26.1
530

531
    LINKER_VERSION_STRING=`$LINKER -Wl,-v 2>&1 | $HEAD -n 1`
532
    # Check if we're using the GNU ld
533
    $ECHO "$LINKER_VERSION_STRING" | $GREP "GNU" > /dev/null
534
    if test $? -eq 0; then
535
      # Extract version number
536
      [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
537
          $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]
538
    else
539
      # Extract version number
540
      [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
541
          $SED -e 's/.*-\([0-9][0-9]*\)/\1/'` ]
542
    fi
543
  fi
544

545
  $1_VERSION_NUMBER="$LINKER_VERSION_NUMBER"
546
  $1_VERSION_STRING="$LINKER_VERSION_STRING"
547

548
  AC_MSG_NOTICE([Using $TOOLCHAIN_TYPE $LINKER_NAME version $LINKER_VERSION_NUMBER @<:@$LINKER_VERSION_STRING@:>@])
549
])
550

551
# Make sure we did not pick up /usr/bin/link, which is the unix-style link
552
# executable.
553
#
554
# $1 = linker to test (LD or BUILD_LD)
555
AC_DEFUN(TOOLCHAIN_VERIFY_LINK_BINARY,
556
[
557
  LINKER=[$]$1
558

559
  AC_MSG_CHECKING([if the found link.exe is actually the Visual Studio linker])
560
  $LINKER --version > /dev/null
561
  if test $? -eq 0 ; then
562
    AC_MSG_RESULT([no])
563
    AC_MSG_ERROR([$LINKER is the winenv link tool. Please check your PATH and rerun configure.])
564
  else
565
    AC_MSG_RESULT([yes])
566
  fi
567
])
568
# Detect the core components of the toolchain, i.e. the compilers (CC and CXX),
569
# preprocessor (CPP and CXXCPP), the linker (LD), the assembler (AS) and the
570
# archiver (AR). Verify that the compilers are correct according to the
571
# toolchain type.
572
AC_DEFUN_ONCE([TOOLCHAIN_DETECT_TOOLCHAIN_CORE],
573
[
574
  #
575
  # Setup the compilers (CC and CXX)
576
  #
577
  TOOLCHAIN_FIND_COMPILER([CC], [C], $TOOLCHAIN_CC_BINARY)
578
  # Now that we have resolved CC ourself, let autoconf have its go at it
579
  AC_PROG_CC([$CC])
580

581
  TOOLCHAIN_FIND_COMPILER([CXX], [C++], $TOOLCHAIN_CXX_BINARY)
582
  # Now that we have resolved CXX ourself, let autoconf have its go at it
583
  AC_PROG_CXX([$CXX])
584

585
  # This is the compiler version number on the form X.Y[.Z]
586
  AC_SUBST(CC_VERSION_NUMBER)
587
  AC_SUBST(CXX_VERSION_NUMBER)
588

589
  TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS
590

591
  if test "x$TOOLCHAIN_MINIMUM_VERSION" != x; then
592
    TOOLCHAIN_CHECK_COMPILER_VERSION(VERSION: $TOOLCHAIN_MINIMUM_VERSION,
593
        IF_OLDER_THAN: [
594
          AC_MSG_WARN([You are using $TOOLCHAIN_TYPE $CC_VERSION_NUMBER which is older than $TOOLCHAIN_MINIMUM_VERSION. This is not a supported configuration.])
595
        ]
596
    )
597
  fi
598

599
  #
600
  # Setup the preprocessor (CPP and CXXCPP)
601
  #
602
  AC_PROG_CPP
603
  UTIL_FIXUP_EXECUTABLE(CPP)
604
  AC_PROG_CXXCPP
605
  UTIL_FIXUP_EXECUTABLE(CXXCPP)
606

607
  #
608
  # Setup the linker (LD)
609
  #
610
  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
611
    # In the Microsoft toolchain we have a separate LD command "link".
612
    UTIL_LOOKUP_TOOLCHAIN_PROGS(LD, link)
613
    TOOLCHAIN_VERIFY_LINK_BINARY(LD)
614
    LDCXX="$LD"
615
  else
616
    # All other toolchains use the compiler to link.
617
    LD="$CC"
618
    LDCXX="$CXX"
619
  fi
620
  AC_SUBST(LD)
621
  # FIXME: it should be CXXLD, according to standard (cf CXXCPP)
622
  AC_SUBST(LDCXX)
623

624
  TOOLCHAIN_EXTRACT_LD_VERSION([LD], [linker])
625
  TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS
626

627
  if test "x$TOOLCHAIN_MINIMUM_LD_VERSION" != x; then
628
    AC_MSG_NOTICE([comparing linker version to minimum version $TOOLCHAIN_MINIMUM_LD_VERSION])
629
    TOOLCHAIN_CHECK_LINKER_VERSION(VERSION: $TOOLCHAIN_MINIMUM_LD_VERSION,
630
        IF_OLDER_THAN: [
631
          AC_MSG_ERROR([You are using a linker older than $TOOLCHAIN_MINIMUM_LD_VERSION. This is not a supported configuration.])
632
        ]
633
    )
634
  fi
635

636
  #
637
  # Setup the assembler (AS)
638
  #
639
  if test "x$TOOLCHAIN_TYPE" != xmicrosoft; then
640
    AS="$CC -c"
641
  else
642
    if test "x$OPENJDK_TARGET_CPU_BITS" = "x64"; then
643
      # On 64 bit windows, the assembler is "ml64.exe"
644
      UTIL_LOOKUP_TOOLCHAIN_PROGS(AS, ml64)
645
    else
646
      # otherwise, the assembler is "ml.exe"
647
      UTIL_LOOKUP_TOOLCHAIN_PROGS(AS, ml)
648
    fi
649
  fi
650
  AC_SUBST(AS)
651

652
  #
653
  # Setup tools for creating static libraries (AR/LIB)
654
  #
655
  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
656
    UTIL_LOOKUP_TOOLCHAIN_PROGS(LIB, lib)
657
  elif test "x$TOOLCHAIN_TYPE" = xgcc; then
658
    UTIL_LOOKUP_TOOLCHAIN_PROGS(AR, ar gcc-ar)
659
  else
660
    UTIL_LOOKUP_TOOLCHAIN_PROGS(AR, ar)
661
  fi
662
])
663

664
# Setup additional tools that is considered a part of the toolchain, but not the
665
# core part. Many of these are highly platform-specific and do not exist,
666
# and/or are not needed on all platforms.
667
AC_DEFUN_ONCE([TOOLCHAIN_DETECT_TOOLCHAIN_EXTRA],
668
[
669
  if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
670
    UTIL_LOOKUP_PROGS(LIPO, lipo)
671
    UTIL_REQUIRE_PROGS(OTOOL, otool)
672
    UTIL_REQUIRE_PROGS(INSTALL_NAME_TOOL, install_name_tool)
673

674
    UTIL_LOOKUP_TOOLCHAIN_PROGS(METAL, metal)
675
    if test "x$METAL" = x; then
676
      AC_MSG_CHECKING([if metal can be run using xcrun])
677
      METAL="xcrun -sdk macosx metal"
678
      test_metal=`$METAL --version 2>&1`
679
      if test $? -ne 0; then
680
        AC_MSG_RESULT([no])
681
        AC_MSG_ERROR([XCode tool 'metal' neither found in path nor with xcrun])
682
      else
683
        AC_MSG_RESULT([yes, will be using '$METAL'])
684
      fi
685
    fi
686

687
    UTIL_LOOKUP_TOOLCHAIN_PROGS(METALLIB, metallib)
688
    if test "x$METALLIB" = x; then
689
      AC_MSG_CHECKING([if metallib can be run using xcrun])
690
      METALLIB="xcrun -sdk macosx metallib"
691
      test_metallib=`$METALLIB --version 2>&1`
692
      if test $? -ne 0; then
693
        AC_MSG_RESULT([no])
694
        AC_MSG_ERROR([XCode tool 'metallib' neither found in path nor with xcrun])
695
      else
696
        AC_MSG_RESULT([yes, will be using '$METALLIB'])
697
      fi
698
    fi
699
  fi
700

701
  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
702
    # Setup the manifest tool (MT)
703
    UTIL_LOOKUP_TOOLCHAIN_PROGS(MT, mt)
704
    # Setup the resource compiler (RC)
705
    UTIL_LOOKUP_TOOLCHAIN_PROGS(RC, rc)
706
    UTIL_LOOKUP_TOOLCHAIN_PROGS(DUMPBIN, dumpbin)
707
  fi
708

709
  if test "x$OPENJDK_TARGET_OS" != xwindows; then
710
    UTIL_LOOKUP_TOOLCHAIN_PROGS(STRIP, strip)
711
    if test "x$TOOLCHAIN_TYPE" = xgcc; then
712
      UTIL_LOOKUP_TOOLCHAIN_PROGS(NM, nm gcc-nm)
713
    else
714
      UTIL_LOOKUP_TOOLCHAIN_PROGS(NM, nm)
715
    fi
716
  fi
717

718
  # objcopy is used for moving debug symbols to separate files when
719
  # full debug symbols are enabled.
720
  if test "x$OPENJDK_TARGET_OS" = xlinux; then
721
    UTIL_LOOKUP_TOOLCHAIN_PROGS(OBJCOPY, gobjcopy objcopy)
722
  fi
723

724
  UTIL_LOOKUP_TOOLCHAIN_PROGS(OBJDUMP, gobjdump objdump)
725

726
  case $TOOLCHAIN_TYPE in
727
    gcc|clang)
728
      if test "x$OPENJDK_TARGET_OS" = xaix; then
729
        UTIL_REQUIRE_TOOLCHAIN_PROGS(CXXFILT, ibm-llvm-cxxfilt)
730
      else
731
        UTIL_REQUIRE_TOOLCHAIN_PROGS(CXXFILT, c++filt)
732
      fi
733
      ;;
734
  esac
735
])
736

737
# Setup the build tools (i.e, the compiler and linker used to build programs
738
# that should be run on the build platform, not the target platform, as a build
739
# helper). Since the non-cross-compile case uses the normal, target compilers
740
# for this, we can only do this after these have been setup.
741
AC_DEFUN_ONCE([TOOLCHAIN_SETUP_BUILD_COMPILERS],
742
[
743
  if test "x$COMPILE_TYPE" = "xcross"; then
744
    # Now we need to find a C/C++ compiler that can build executables for the
745
    # build platform. We can't use the AC_PROG_CC macro, since it can only be
746
    # used once. Also, we need to do this without adding a tools dir to the
747
    # path, otherwise we might pick up cross-compilers which don't use standard
748
    # naming.
749

750
    OLDPATH="$PATH"
751

752
    AC_ARG_WITH(build-devkit, [AS_HELP_STRING([--with-build-devkit],
753
        [Devkit to use for the build platform toolchain])])
754
    if test "x$with_build_devkit" = "xyes"; then
755
      AC_MSG_ERROR([--with-build-devkit must have a value])
756
    elif test -n "$with_build_devkit"; then
757
      if test ! -d "$with_build_devkit"; then
758
        AC_MSG_ERROR([--with-build-devkit points to non existing dir: $with_build_devkit])
759
      else
760
        UTIL_FIXUP_PATH([with_build_devkit])
761
        BUILD_DEVKIT_ROOT="$with_build_devkit"
762
        # Check for a meta data info file in the root of the devkit
763
        if test -f "$BUILD_DEVKIT_ROOT/devkit.info"; then
764
          # Process devkit.info so that existing devkit variables are not
765
          # modified by this
766
          $SED -e "s/^DEVKIT_/BUILD_DEVKIT_/g" \
767
              -e "s/\$DEVKIT_ROOT/\$BUILD_DEVKIT_ROOT/g" \
768
              -e "s/\$host/\$build/g" \
769
              $BUILD_DEVKIT_ROOT/devkit.info \
770
              > $CONFIGURESUPPORT_OUTPUTDIR/build-devkit.info
771
          . $CONFIGURESUPPORT_OUTPUTDIR/build-devkit.info
772
          # This potentially sets the following:
773
          # A descriptive name of the devkit
774
          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_NAME])
775
          # Corresponds to --with-extra-path
776
          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_EXTRA_PATH])
777
          # Corresponds to --with-toolchain-path
778
          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_TOOLCHAIN_PATH])
779
          # Corresponds to --with-sysroot
780
          BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_SYSROOT])
781

782
          if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
783
            BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_VS_INCLUDE])
784
            BASIC_EVAL_BUILD_DEVKIT_VARIABLE([BUILD_DEVKIT_VS_LIB])
785
          fi
786
        fi
787

788
        AC_MSG_CHECKING([for build platform devkit])
789
        if test "x$BUILD_DEVKIT_NAME" != x; then
790
          AC_MSG_RESULT([$BUILD_DEVKIT_NAME in $BUILD_DEVKIT_ROOT])
791
        else
792
          AC_MSG_RESULT([$BUILD_DEVKIT_ROOT])
793
        fi
794

795
        # Fallback default of just /bin if DEVKIT_PATH is not defined
796
        if test "x$BUILD_DEVKIT_TOOLCHAIN_PATH" = x; then
797
          BUILD_DEVKIT_TOOLCHAIN_PATH="$BUILD_DEVKIT_ROOT/bin"
798
        fi
799
        PATH="$BUILD_DEVKIT_TOOLCHAIN_PATH:$BUILD_DEVKIT_EXTRA_PATH"
800

801
        BUILD_SYSROOT="$BUILD_DEVKIT_SYSROOT"
802

803
        if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
804
          # For historical reasons, paths are separated by ; in devkit.info
805
          BUILD_VS_INCLUDE="${BUILD_DEVKIT_VS_INCLUDE//;/:}"
806
          BUILD_VS_LIB="${BUILD_DEVKIT_VS_LIB//;/:}"
807

808
          TOOLCHAIN_SETUP_VISUAL_STUDIO_SYSROOT_FLAGS(BUILD_, BUILD_)
809
        fi
810
      fi
811
    else
812
      if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
813
        # If we got no devkit, we need to go hunting for the proper env
814
        TOOLCHAIN_FIND_VISUAL_STUDIO_BAT_FILE($OPENJDK_BUILD_CPU, [$TOOLCHAIN_VERSION])
815
        TOOLCHAIN_EXTRACT_VISUAL_STUDIO_ENV($OPENJDK_BUILD_CPU, BUILD_)
816

817
        # We cannot currently export the VS_PATH to spec.gmk. This is probably
818
        # strictly not correct, but seems to work anyway.
819

820
        # Convert VS_INCLUDE and VS_LIB into sysroot flags
821
        TOOLCHAIN_SETUP_VISUAL_STUDIO_SYSROOT_FLAGS(BUILD_)
822
      fi
823
    fi
824

825
    if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
826
      UTIL_REQUIRE_PROGS(BUILD_CC, cl, [$VS_PATH])
827
      UTIL_REQUIRE_PROGS(BUILD_CXX, cl, [$VS_PATH])
828

829
      # On windows, the assembler is "ml.exe". We currently don't need this so
830
      # do not require.
831
      if test "x$OPENJDK_BUILD_CPU_BITS" = "x64"; then
832
        # On 64 bit windows, the assembler is "ml64.exe"
833
        UTIL_LOOKUP_PROGS(BUILD_AS, ml64, [$VS_PATH])
834
      else
835
        # otherwise the assembler is "ml.exe"
836
        UTIL_LOOKUP_PROGS(BUILD_AS, ml, [$VS_PATH])
837
      fi
838

839
      # On windows, the ar tool is lib.exe (used to create static libraries).
840
      # We currently don't need this so do not require.
841
      UTIL_LOOKUP_PROGS(BUILD_AR, lib, [$VS_PATH])
842

843
      # In the Microsoft toolchain we have a separate LD command "link".
844
      UTIL_REQUIRE_PROGS(BUILD_LD, link, [$VS_PATH])
845
      TOOLCHAIN_VERIFY_LINK_BINARY(BUILD_LD)
846
      BUILD_LDCXX="$BUILD_LD"
847
    else
848
      if test "x$OPENJDK_BUILD_OS" = xmacosx; then
849
        UTIL_REQUIRE_PROGS(BUILD_CC, clang)
850
        UTIL_REQUIRE_PROGS(BUILD_CXX, clang++)
851
      else
852
        UTIL_REQUIRE_PROGS(BUILD_CC, cc gcc)
853
        UTIL_REQUIRE_PROGS(BUILD_CXX, CC g++)
854
      fi
855
      UTIL_LOOKUP_PROGS(BUILD_NM, nm gcc-nm)
856
      UTIL_LOOKUP_PROGS(BUILD_AR, ar gcc-ar lib)
857
      UTIL_LOOKUP_PROGS(BUILD_OBJCOPY, objcopy)
858
      UTIL_LOOKUP_PROGS(BUILD_STRIP, strip)
859
      # Assume the C compiler is the assembler
860
      BUILD_AS="$BUILD_CC -c"
861
      # Just like for the target compiler, use the compiler as linker
862
      BUILD_LD="$BUILD_CC"
863
      BUILD_LDCXX="$BUILD_CXX"
864
    fi
865

866
    PATH="$OLDPATH"
867

868
    TOOLCHAIN_EXTRACT_COMPILER_VERSION(BUILD_CC, [BuildC])
869
    TOOLCHAIN_EXTRACT_COMPILER_VERSION(BUILD_CXX, [BuildC++])
870
    TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS([BUILD_], [OPENJDK_BUILD_], [build ])
871
    TOOLCHAIN_EXTRACT_LD_VERSION(BUILD_LD, [build linker])
872
    TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS([BUILD_], [OPENJDK_BUILD_])
873
  else
874
    # If we are not cross compiling, use the normal target compilers for
875
    # building the build platform executables.
876
    BUILD_CC="$CC"
877
    BUILD_CXX="$CXX"
878
    BUILD_LD="$LD"
879
    BUILD_LDCXX="$LDCXX"
880
    BUILD_NM="$NM"
881
    BUILD_AS="$AS"
882
    BUILD_OBJCOPY="$OBJCOPY"
883
    BUILD_STRIP="$STRIP"
884
    BUILD_AR="$AR"
885

886
    TOOLCHAIN_PREPARE_FOR_VERSION_COMPARISONS([], [OPENJDK_BUILD_], [build ])
887
    TOOLCHAIN_PREPARE_FOR_LD_VERSION_COMPARISONS([BUILD_], [OPENJDK_BUILD_])
888
  fi
889

890
  AC_SUBST(BUILD_CC)
891
  AC_SUBST(BUILD_CXX)
892
  AC_SUBST(BUILD_LD)
893
  AC_SUBST(BUILD_LDCXX)
894
  AC_SUBST(BUILD_NM)
895
  AC_SUBST(BUILD_AS)
896
  AC_SUBST(BUILD_AR)
897
])
898

899
# Do some additional checks on the detected tools.
900
AC_DEFUN_ONCE([TOOLCHAIN_MISC_CHECKS],
901
[
902
  # Check for extra potential brokenness.
903
  if test  "x$TOOLCHAIN_TYPE" = xmicrosoft; then
904
    # On Windows, double-check that we got the right compiler.
905
    CC_VERSION_OUTPUT=`$CC 2>&1 1>/dev/null | $HEAD -n 1 | $TR -d '\r'`
906
    COMPILER_CPU_TEST=`$ECHO $CC_VERSION_OUTPUT | $SED -n "s/^.* \(.*\)$/\1/p"`
907
    if test "x$OPENJDK_TARGET_CPU" = "xx86"; then
908
      if test "x$COMPILER_CPU_TEST" != "x80x86" -a "x$COMPILER_CPU_TEST" != "xx86"; then
909
        AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "80x86" or "x86".])
910
      fi
911
    elif test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
912
      if test "x$COMPILER_CPU_TEST" != "xx64"; then
913
        AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "x64".])
914
      fi
915
    elif test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
916
      if test "x$COMPILER_CPU_TEST" != "xARM64"; then
917
        AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "arm64".])
918
      fi
919
    fi
920
  fi
921
  if test "x$OPENJDK_TARGET_OS" = xaix; then
922
    # Make sure we have the Open XL version of clang on AIX
923

924
    $ECHO "$CC_VERSION_STRING" | $GREP "IBM Open XL C/C++ for AIX" > /dev/null
925
    if test $? -ne 0; then
926
      AC_MSG_ERROR([ibm-clang_r version output check failed, output: $CC_VERSION_OUTPUT])
927
    fi
928
  fi
929

930
  if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
931
    # Check if linker has -z noexecstack.
932
    HAS_NOEXECSTACK=`$CC -Wl,--help 2>/dev/null | $GREP 'z noexecstack'`
933
    # This is later checked when setting flags.
934
  fi
935

936
  # Setup hotspot lecagy names for toolchains
937
  HOTSPOT_TOOLCHAIN_TYPE=$TOOLCHAIN_TYPE
938
  if test "x$TOOLCHAIN_TYPE" = xclang; then
939
    HOTSPOT_TOOLCHAIN_TYPE=gcc
940
  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
941
    HOTSPOT_TOOLCHAIN_TYPE=visCPP
942
  fi
943
  AC_SUBST(HOTSPOT_TOOLCHAIN_TYPE)
944
])
945

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