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common/autoconf/flags.m4@ef88239d3d16
common/autoconf/flags.m4
Wed, 24 Jul 2019 03:18:35 +0100
- author
- andrew
- date
- Wed, 24 Jul 2019 03:18:35 +0100
- changeset 2445
- ef88239d3d16
- parent 2424
- 3a2c8d0a600d
- child 2482
- 5f55e79422a0
- permissions
- -rw-r--r--
8223219: Backport of JDK-8199552 to OpenJDK 8 leads to duplicate -fstack-protector flags, overriding --with-extra-cflags
Summary: Apply -fstack-protector to all archs and remove duplication in JDK build
Reviewed-by: sgehwolf
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 #
26 AC_DEFUN_ONCE([FLAGS_SETUP_INIT_FLAGS],
27 [
28 # Option used to tell the compiler whether to create 32- or 64-bit executables
29 if test "x$TOOLCHAIN_TYPE" = xxlc; then
30 COMPILER_TARGET_BITS_FLAG="-q"
31 else
32 COMPILER_TARGET_BITS_FLAG="-m"
33 fi
34 AC_SUBST(COMPILER_TARGET_BITS_FLAG)
36 # FIXME: figure out if we should select AR flags depending on OS or toolchain.
37 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
38 ARFLAGS="-r"
39 elif test "x$OPENJDK_TARGET_OS" = xaix; then
40 ARFLAGS="-X64"
41 elif test "x$OPENJDK_TARGET_OS" = xwindows; then
42 # lib.exe is used as AR to create static libraries.
43 ARFLAGS="-nologo -NODEFAULTLIB:MSVCRT"
44 else
45 ARFLAGS=""
46 fi
47 AC_SUBST(ARFLAGS)
49 ## Setup strip.
50 # FIXME: should this really be per platform, or should it be per toolchain type?
51 # strip is not provided by clang or solstudio; so guessing platform makes most sense.
52 # FIXME: we should really only export STRIPFLAGS from here, not POST_STRIP_CMD.
53 if test "x$OPENJDK_TARGET_OS" = xlinux; then
54 STRIPFLAGS="-g"
55 elif test "x$OPENJDK_TARGET_OS" = xsolaris; then
56 STRIPFLAGS="-x"
57 elif test "x$OPENJDK_TARGET_OS" = xmacosx; then
58 STRIPFLAGS="-S"
59 elif test "x$OPENJDK_TARGET_OS" = xaix; then
60 STRIPFLAGS="-X32_64"
61 fi
63 if test "x$OPENJDK_TARGET_OS" != xwindows; then
64 POST_STRIP_CMD="$STRIP $STRIPFLAGS"
65 fi
66 AC_SUBST(POST_STRIP_CMD)
68 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
69 # FIXME: break out into MCSFLAGS
70 POST_MCS_CMD="$MCS -d -a \"JDK $FULL_VERSION\""
71 fi
72 AC_SUBST(POST_MCS_CMD)
74 if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
75 CC_OUT_OPTION=-Fo
76 EXE_OUT_OPTION=-out:
77 LD_OUT_OPTION=-out:
78 AR_OUT_OPTION=-out:
79 else
80 # The option used to specify the target .o,.a or .so file.
81 # When compiling, how to specify the to be created object file.
82 CC_OUT_OPTION='-o$(SPACE)'
83 # When linking, how to specify the to be created executable.
84 EXE_OUT_OPTION='-o$(SPACE)'
85 # When linking, how to specify the to be created dynamically linkable library.
86 LD_OUT_OPTION='-o$(SPACE)'
87 # When archiving, how to specify the to be create static archive for object files.
88 AR_OUT_OPTION='rcs$(SPACE)'
89 fi
90 AC_SUBST(CC_OUT_OPTION)
91 AC_SUBST(EXE_OUT_OPTION)
92 AC_SUBST(LD_OUT_OPTION)
93 AC_SUBST(AR_OUT_OPTION)
95 # On Windows, we need to set RC flags.
96 if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
97 RC_FLAGS="-nologo -l 0x409 -r"
98 if test "x$VARIANT" = xOPT; then
99 RC_FLAGS="$RC_FLAGS -d NDEBUG"
100 fi
102 # The version variables used to create RC_FLAGS may be overridden
103 # in a custom configure script, or possibly the command line.
104 # Let those variables be expanded at make time in spec.gmk.
105 # The \$ are escaped to the shell, and the $(...) variables
106 # are evaluated by make.
107 RC_FLAGS="$RC_FLAGS \
108 -d \"JDK_BUILD_ID=\$(FULL_VERSION)\" \
109 -d \"JDK_COMPANY=\$(COMPANY_NAME)\" \
110 -d \"JDK_COMPONENT=\$(PRODUCT_NAME) \$(JDK_RC_PLATFORM_NAME) binary\" \
111 -d \"JDK_VER=\$(JDK_MINOR_VERSION).\$(JDK_MICRO_VERSION).\$(COOKED_JDK_UPDATE_VERSION).\$(COOKED_BUILD_NUMBER)\" \
112 -d \"JDK_COPYRIGHT=Copyright \xA9 $COPYRIGHT_YEAR\" \
113 -d \"JDK_NAME=\$(PRODUCT_NAME) \$(JDK_RC_PLATFORM_NAME) \$(JDK_MINOR_VERSION) \$(JDK_UPDATE_META_TAG)\" \
114 -d \"JDK_FVER=\$(JDK_MINOR_VERSION),\$(JDK_MICRO_VERSION),\$(if \$(COOKED_JDK_UPDATE_VERSION),\$(COOKED_JDK_UPDATE_VERSION),0),\$(COOKED_BUILD_NUMBER)\""
115 fi
116 AC_SUBST(RC_FLAGS)
118 if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
119 # FIXME: likely bug, should be CCXXFLAGS_JDK? or one for C or CXX.
120 CCXXFLAGS="$CCXXFLAGS -nologo"
121 fi
123 if test "x$SYSROOT" != "x"; then
124 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
125 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
126 # Solaris Studio does not have a concept of sysroot. Instead we must
127 # make sure the default include and lib dirs are appended to each
128 # compile and link command line.
129 SYSROOT_CFLAGS="-I$SYSROOT/usr/include"
130 SYSROOT_LDFLAGS="-L$SYSROOT/usr/lib$OPENJDK_TARGET_CPU_ISADIR \
131 -L$SYSROOT/lib$OPENJDK_TARGET_CPU_ISADIR \
132 -L$SYSROOT/usr/ccs/lib$OPENJDK_TARGET_CPU_ISADIR"
133 fi
134 elif test "x$TOOLCHAIN_TYPE" = xgcc; then
135 SYSROOT_CFLAGS="--sysroot=\"$SYSROOT\""
136 SYSROOT_LDFLAGS="--sysroot=\"$SYSROOT\""
137 elif test "x$TOOLCHAIN_TYPE" = xclang; then
138 SYSROOT_CFLAGS="-isysroot \"$SYSROOT\""
139 SYSROOT_LDFLAGS="-isysroot \"$SYSROOT\""
140 fi
141 # Propagate the sysroot args to hotspot
142 LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS $SYSROOT_CFLAGS"
143 LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS $SYSROOT_CFLAGS"
144 LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS $SYSROOT_LDFLAGS"
145 fi
146 AC_SUBST(SYSROOT_CFLAGS)
147 AC_SUBST(SYSROOT_LDFLAGS)
148 ])
150 AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_LIBS],
151 [
152 ###############################################################################
153 #
154 # How to compile shared libraries.
155 #
157 if test "x$TOOLCHAIN_TYPE" = xgcc; then
158 PICFLAG="-fPIC"
159 C_FLAG_REORDER=''
160 CXX_FLAG_REORDER=''
162 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
163 # Linking is different on MacOSX
164 SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
165 SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker @loader_path/.'
166 SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
167 SET_SHARED_LIBRARY_NAME='-Xlinker -install_name -Xlinker @rpath/[$]1'
168 SET_SHARED_LIBRARY_MAPFILE=''
169 else
170 # Default works for linux, might work on other platforms as well.
171 SHARED_LIBRARY_FLAGS='-shared'
172 SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$ORIGIN[$]1'
173 SET_SHARED_LIBRARY_ORIGIN="-Xlinker -z -Xlinker origin $SET_EXECUTABLE_ORIGIN"
174 SET_SHARED_LIBRARY_NAME='-Xlinker -soname=[$]1'
175 SET_SHARED_LIBRARY_MAPFILE='-Xlinker -version-script=[$]1'
176 fi
177 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
178 PICFLAG="-KPIC"
179 C_FLAG_REORDER='-xF'
180 CXX_FLAG_REORDER='-xF'
181 SHARED_LIBRARY_FLAGS="-G"
182 SET_EXECUTABLE_ORIGIN='-R\$$$$ORIGIN[$]1'
183 SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
184 SET_SHARED_LIBRARY_NAME=''
185 SET_SHARED_LIBRARY_MAPFILE='-M[$]1'
186 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
187 PICFLAG="-qpic=large"
188 C_FLAG_REORDER=''
189 CXX_FLAG_REORDER=''
190 SHARED_LIBRARY_FLAGS="-qmkshrobj"
191 SET_EXECUTABLE_ORIGIN=""
192 SET_SHARED_LIBRARY_ORIGIN=''
193 SET_SHARED_LIBRARY_NAME=''
194 SET_SHARED_LIBRARY_MAPFILE=''
195 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
196 PICFLAG=""
197 C_FLAG_REORDER=''
198 CXX_FLAG_REORDER=''
199 SHARED_LIBRARY_FLAGS="-LD"
200 SET_EXECUTABLE_ORIGIN=''
201 SET_SHARED_LIBRARY_ORIGIN=''
202 SET_SHARED_LIBRARY_NAME=''
203 SET_SHARED_LIBRARY_MAPFILE=''
204 fi
206 AC_SUBST(C_FLAG_REORDER)
207 AC_SUBST(CXX_FLAG_REORDER)
208 AC_SUBST(SHARED_LIBRARY_FLAGS)
209 AC_SUBST(SET_EXECUTABLE_ORIGIN)
210 AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)
211 AC_SUBST(SET_SHARED_LIBRARY_NAME)
212 AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)
214 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
215 CFLAGS_JDK="${CFLAGS_JDK} -D__solaris__"
216 CXXFLAGS_JDK="${CXXFLAGS_JDK} -D__solaris__"
217 CFLAGS_JDKLIB_EXTRA='-xstrconst'
218 fi
219 # The (cross) compiler is now configured, we can now test capabilities
220 # of the target platform.
221 ])
223 # Documentation on common flags used for solstudio in HIGHEST.
224 #
225 # WARNING: Use of OPTIMIZATION_LEVEL=HIGHEST in your Makefile needs to be
226 # done with care, there are some assumptions below that need to
227 # be understood about the use of pointers, and IEEE behavior.
228 #
229 # -fns: Use non-standard floating point mode (not IEEE 754)
230 # -fsimple: Do some simplification of floating point arithmetic (not IEEE 754)
231 # -fsingle: Use single precision floating point with 'float'
232 # -xalias_level=basic: Assume memory references via basic pointer types do not alias
233 # (Source with excessing pointer casting and data access with mixed
234 # pointer types are not recommended)
235 # -xbuiltin=%all: Use intrinsic or inline versions for math/std functions
236 # (If you expect perfect errno behavior, do not use this)
237 # -xdepend: Loop data dependency optimizations (need -xO3 or higher)
238 # -xrestrict: Pointer parameters to functions do not overlap
239 # (Similar to -xalias_level=basic usage, but less obvious sometimes.
240 # If you pass in multiple pointers to the same data, do not use this)
241 # -xlibmil: Inline some library routines
242 # (If you expect perfect errno behavior, do not use this)
243 # -xlibmopt: Use optimized math routines (CURRENTLY DISABLED)
244 # (If you expect perfect errno behavior, do not use this)
245 # Can cause undefined external on Solaris 8 X86 on __sincos, removing for now
247 # FIXME: this will never happen since sparc != sparcv9, ie 32 bit, which we don't build anymore.
248 # Bug?
249 #if test "x$OPENJDK_TARGET_CPU" = xsparc; then
250 # CFLAGS_JDK="${CFLAGS_JDK} -xmemalign=4s"
251 # CXXFLAGS_JDK="${CXXFLAGS_JDK} -xmemalign=4s"
252 #fi
254 AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION],
255 [
257 ###############################################################################
258 #
259 # Setup the opt flags for different compilers
260 # and different operating systems.
261 #
263 # FIXME: this was indirectly the old default, but just inherited.
264 # if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
265 # C_FLAG_DEPS="-MMD -MF"
266 # fi
268 # Generate make dependency files
269 if test "x$TOOLCHAIN_TYPE" = xgcc; then
270 C_FLAG_DEPS="-MMD -MF"
271 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
272 C_FLAG_DEPS="-xMMD -xMF"
273 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
274 C_FLAG_DEPS="-qmakedep=gcc -MF"
275 fi
276 CXX_FLAG_DEPS="$C_FLAG_DEPS"
277 AC_SUBST(C_FLAG_DEPS)
278 AC_SUBST(CXX_FLAG_DEPS)
280 # Debug symbols
281 #
282 # By default don't set any specific assembler debug
283 # info flags for toolchains unless we know they work.
284 # See JDK-8207057.
285 ASFLAGS_DEBUG_SYMBOLS=""
286 if test "x$TOOLCHAIN_TYPE" = xgcc; then
287 if test "x$OPENJDK_TARGET_CPU_BITS" = "x64" && test "x$DEBUG_LEVEL" = "xfastdebug"; then
288 CFLAGS_DEBUG_SYMBOLS="-g1"
289 CXXFLAGS_DEBUG_SYMBOLS="-g1"
290 else
291 CFLAGS_DEBUG_SYMBOLS="-g"
292 CXXFLAGS_DEBUG_SYMBOLS="-g"
293 fi
294 ASFLAGS_DEBUG_SYMBOLS="-g"
295 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
296 CFLAGS_DEBUG_SYMBOLS="-g -xs"
297 CXXFLAGS_DEBUG_SYMBOLS="-g0 -xs"
298 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
299 CFLAGS_DEBUG_SYMBOLS="-g"
300 CXXFLAGS_DEBUG_SYMBOLS="-g"
301 fi
302 AC_SUBST(ASFLAGS_DEBUG_SYMBOLS)
303 AC_SUBST(CFLAGS_DEBUG_SYMBOLS)
304 AC_SUBST(CXXFLAGS_DEBUG_SYMBOLS)
306 # Optimization levels
307 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
308 CC_HIGHEST="$CC_HIGHEST -fns -fsimple -fsingle -xalias_level=basic -xbuiltin=%all -xdepend -xrestrict -xlibmil"
310 if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86"; then
311 # FIXME: seems we always set -xregs=no%frameptr; put it elsewhere more global?
312 C_O_FLAG_HIGHEST="-xO4 -Wu,-O4~yz $CC_HIGHEST -xregs=no%frameptr"
313 C_O_FLAG_HI="-xO4 -Wu,-O4~yz -xregs=no%frameptr"
314 C_O_FLAG_NORM="-xO2 -Wu,-O2~yz -xregs=no%frameptr"
315 C_O_FLAG_NONE="-xregs=no%frameptr"
316 CXX_O_FLAG_HIGHEST="-xO4 -Qoption ube -O4~yz $CC_HIGHEST -xregs=no%frameptr"
317 CXX_O_FLAG_HI="-xO4 -Qoption ube -O4~yz -xregs=no%frameptr"
318 CXX_O_FLAG_NORM="-xO2 -Qoption ube -O2~yz -xregs=no%frameptr"
319 CXX_O_FLAG_NONE="-xregs=no%frameptr"
320 if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then
321 C_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST -xchip=pentium"
322 CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_HIGHEST -xchip=pentium"
323 fi
324 elif test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then
325 C_O_FLAG_HIGHEST="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0 $CC_HIGHEST -xprefetch=auto,explicit -xchip=ultra"
326 C_O_FLAG_HI="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0"
327 C_O_FLAG_NORM="-xO2 -Wc,-Qrm-s -Wc,-Qiselect-T0"
328 C_O_FLAG_NONE=""
329 CXX_O_FLAG_HIGHEST="-xO4 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0 $CC_HIGHEST -xprefetch=auto,explicit -xchip=ultra"
330 CXX_O_FLAG_HI="-xO4 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0"
331 CXX_O_FLAG_NORM="-xO2 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0"
332 CXX_O_FLAG_NONE=""
333 fi
334 else
335 # The remaining toolchains share opt flags between CC and CXX;
336 # setup for C and duplicate afterwards.
337 if test "x$TOOLCHAIN_TYPE" = xgcc; then
338 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
339 # On MacOSX we optimize for size, something
340 # we should do for all platforms?
341 C_O_FLAG_HIGHEST="-Os"
342 C_O_FLAG_HI="-Os"
343 C_O_FLAG_NORM="-Os"
344 C_O_FLAG_NONE=""
345 else
346 C_O_FLAG_HIGHEST="-O3"
347 C_O_FLAG_HI="-O3"
348 C_O_FLAG_NORM="-O2"
349 C_O_FLAG_NONE="-O0"
350 fi
351 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
352 C_O_FLAG_HIGHEST="-O3"
353 C_O_FLAG_HI="-O3 -qstrict"
354 C_O_FLAG_NORM="-O2"
355 C_O_FLAG_NONE=""
356 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
357 C_O_FLAG_HIGHEST="-O2"
358 C_O_FLAG_HI="-O1"
359 C_O_FLAG_NORM="-O1"
360 C_O_FLAG_NONE="-Od"
361 fi
362 CXX_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST"
363 CXX_O_FLAG_HI="$C_O_FLAG_HI"
364 CXX_O_FLAG_NORM="$C_O_FLAG_NORM"
365 CXX_O_FLAG_NONE="$C_O_FLAG_NONE"
366 fi
368 AC_SUBST(C_O_FLAG_HIGHEST)
369 AC_SUBST(C_O_FLAG_HI)
370 AC_SUBST(C_O_FLAG_NORM)
371 AC_SUBST(C_O_FLAG_NONE)
372 AC_SUBST(CXX_O_FLAG_HIGHEST)
373 AC_SUBST(CXX_O_FLAG_HI)
374 AC_SUBST(CXX_O_FLAG_NORM)
375 AC_SUBST(CXX_O_FLAG_NONE)
376 ])
378 AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_JDK],
379 [
380 # Special extras...
381 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
382 if test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then
383 CFLAGS_JDKLIB_EXTRA="${CFLAGS_JDKLIB_EXTRA} -xregs=no%appl"
384 CXXFLAGS_JDKLIB_EXTRA="${CXXFLAGS_JDKLIB_EXTRA} -xregs=no%appl"
385 fi
386 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
387 LDFLAGS_JDK="${LDFLAGS_JDK} -q64 -brtl -bnolibpath -liconv -bexpall"
388 CFLAGS_JDK="${CFLAGS_JDK} -qchars=signed -q64 -qfullpath -qsaveopt"
389 CXXFLAGS_JDK="${CXXFLAGS_JDK} -qchars=signed -q64 -qfullpath -qsaveopt"
390 elif test "x$TOOLCHAIN_TYPE" = xgcc; then
391 LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS -fstack-protector"
392 LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS -fstack-protector"
393 if test "x$OPENJDK_TARGET_OS" != xmacosx; then
394 LDFLAGS_JDK="$LDFLAGS_JDK -Wl,-z,relro"
395 LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS -Wl,-z,relro"
396 fi
397 $2CXXSTD_CXXFLAG="-std=gnu++98"
398 FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]$2CXXSTD_CXXFLAG -Werror],
399 [], [$2CXXSTD_CXXFLAG=""])
400 $2CXXFLAGS_JDK="${$2CXXFLAGS_JDK} ${$2CXXSTD_CXXFLAG}"
401 $2JVM_CFLAGS="${$2JVM_CFLAGS} ${$2CXXSTD_CXXFLAG}"
402 AC_SUBST($2CXXSTD_CXXFLAG)
403 fi
405 if test "x$CFLAGS" != "x${ADDED_CFLAGS}"; then
406 AC_MSG_WARN([Ignoring CFLAGS($CFLAGS) found in environment. Use --with-extra-cflags])
407 fi
409 if test "x$CXXFLAGS" != "x${ADDED_CXXFLAGS}"; then
410 AC_MSG_WARN([Ignoring CXXFLAGS($CXXFLAGS) found in environment. Use --with-extra-cxxflags])
411 fi
413 if test "x$LDFLAGS" != "x${ADDED_LDFLAGS}"; then
414 AC_MSG_WARN([Ignoring LDFLAGS($LDFLAGS) found in environment. Use --with-extra-ldflags])
415 fi
417 AC_ARG_WITH(extra-cflags, [AS_HELP_STRING([--with-extra-cflags],
418 [extra flags to be used when compiling jdk c-files])])
420 AC_ARG_WITH(extra-cxxflags, [AS_HELP_STRING([--with-extra-cxxflags],
421 [extra flags to be used when compiling jdk c++-files])])
423 AC_ARG_WITH(extra-ldflags, [AS_HELP_STRING([--with-extra-ldflags],
424 [extra flags to be used when linking jdk])])
426 CFLAGS_JDK="${CFLAGS_JDK} $with_extra_cflags"
427 CXXFLAGS_JDK="${CXXFLAGS_JDK} $with_extra_cxxflags"
428 LDFLAGS_JDK="${LDFLAGS_JDK} $with_extra_ldflags"
430 # Hotspot needs these set in their legacy form
431 LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS $with_extra_cflags"
432 LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS $with_extra_cxxflags"
433 LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS $with_extra_ldflags"
435 AC_SUBST(LEGACY_EXTRA_CFLAGS)
436 AC_SUBST(LEGACY_EXTRA_CXXFLAGS)
437 AC_SUBST(LEGACY_EXTRA_LDFLAGS)
439 ###############################################################################
440 #
441 # Now setup the CFLAGS and LDFLAGS for the JDK build.
442 # Later we will also have CFLAGS and LDFLAGS for the hotspot subrepo build.
443 #
445 FDLIBM_CFLAGS=""
446 # Setup compiler/platform specific flags to CFLAGS_JDK,
447 # CXXFLAGS_JDK and CCXXFLAGS_JDK (common to C and CXX?)
448 if test "x$TOOLCHAIN_TYPE" = xgcc; then
449 # these options are used for both C and C++ compiles
450 CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -Wall -Wno-parentheses -Wextra -Wno-unused -Wno-unused-parameter -Wformat=2 \
451 -pipe -fstack-protector -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE"
452 case $OPENJDK_TARGET_CPU_ARCH in
453 arm )
454 # on arm we don't prevent gcc to omit frame pointer but do prevent strict aliasing
455 CFLAGS_JDK="${CFLAGS_JDK} -fno-strict-aliasing"
456 ;;
457 ppc )
458 # on ppc we don't prevent gcc to omit frame pointer nor strict-aliasing
459 ;;
460 * )
461 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -fno-omit-frame-pointer"
462 CFLAGS_JDK="${CFLAGS_JDK} -fno-strict-aliasing"
463 ;;
464 esac
465 TOOLCHAIN_CHECK_COMPILER_VERSION(6, FLAGS_SETUP_GCC6_COMPILER_FLAGS)
467 # Check that the compiler supports -ffp-contract=off flag
468 # Set FDLIBM_CFLAGS to -ffp-contract=off if it does.
469 # For GCC < 4.6, on x86, x86_64 and ppc check for
470 # -mno-fused-madd and -fno-strict-aliasing. If they exist,
471 # use them as a substitute for -ffp-contract=off.
472 #
473 # These flags are required for GCC-based builds of
474 # fdlibm with optimization without losing precision.
475 # Notably, -ffp-contract=off needs to be added for GCC >= 4.6,
476 # -mno-fused-madd -fno-strict-aliasing for GCC < 4.6
477 COMPILER_FP_CONTRACT_OFF_FLAG="-ffp-contract=off"
478 FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]COMPILER_FP_CONTRACT_OFF_FLAG -Werror],
479 [], [COMPILER_FP_CONTRACT_OFF_FLAG=""])
480 if test "x$COMPILER_FP_CONTRACT_OFF_FLAG" = x; then
481 if test "$OPENJDK_TARGET_CPU_ARCH" = "x86" ||
482 test "$OPENJDK_TARGET_CPU_ARCH" = "x86_64" ||
483 test "$OPENJDK_TARGET_CPU_ARCH" = "ppc"; then
484 M_NO_FUSED_ADD_FLAG="-mno-fused-madd"
485 FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]M_NO_FUSED_ADD_FLAG -Werror],
486 [], [M_NO_FUSED_ADD_FLAG=""])
487 NO_STRICT_ALIASING_FLAG="-fno-strict-aliasing"
488 FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]NO_STRICT_ALIASING_FLAG -Werror],
489 [], [NO_STRICT_ALIASING_FLAG=""])
490 if test "x$M_NO_FUSED_ADD_FLAG" != "x" && test "x$NO_STRICT_ALIASING_FLAG" != "x"; then
491 FDLIBM_CFLAGS="$M_NO_FUSED_ADD_FLAG $NO_STRICT_ALIASING_FLAG"
492 fi
493 fi
494 else
495 FDLIBM_CFLAGS="$COMPILER_FP_CONTRACT_OFF_FLAG"
496 fi
497 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
498 CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -DTRACING -DMACRO_MEMSYS_OPS -DBREAKPTS"
499 if test "x$OPENJDK_TARGET_CPU_ARCH" = xx86; then
500 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DcpuIntel -Di586 -D$OPENJDK_TARGET_CPU_LEGACY_LIB"
501 CFLAGS_JDK="$CFLAGS_JDK -erroff=E_BAD_PRAGMA_PACK_VALUE"
502 fi
504 CFLAGS_JDK="$CFLAGS_JDK -xc99=%none -xCC -errshort=tags -Xa -v -mt -W0,-noglobal"
505 CXXFLAGS_JDK="$CXXFLAGS_JDK -errtags=yes +w -mt -features=no%except -DCC_NOEX -norunpath -xnolib"
506 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
507 CFLAGS_JDK="$CFLAGS_JDK -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"
508 CXXFLAGS_JDK="$CXXFLAGS_JDK -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"
509 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
510 CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK \
511 -Zi -MD -Zc:wchar_t- -W3 -wd4800 \
512 -DWIN32_LEAN_AND_MEAN \
513 -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE \
514 -DWIN32 -DIAL"
515 if test "x$OPENJDK_TARGET_CPU" = xx86_64; then
516 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_AMD64_ -Damd64"
517 else
518 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_X86_ -Dx86"
519 fi
520 # If building with Visual Studio 2010, we can still use _STATIC_CPPLIB to
521 # avoid bundling msvcpNNN.dll. Doesn't work with newer versions of visual
522 # studio.
523 if test "x$TOOLCHAIN_VERSION" = "x2010"; then
524 CCXXFLAGS_JDK="$CCXXFLAGS_JDK \
525 -D_STATIC_CPPLIB -D_DISABLE_DEPRECATE_STATIC_CPPLIB"
526 fi
527 fi
528 AC_SUBST(FDLIBM_CFLAGS)
530 ###############################################################################
532 # Adjust flags according to debug level.
533 case $DEBUG_LEVEL in
534 fastdebug )
535 CFLAGS_JDK="$CFLAGS_JDK $CFLAGS_DEBUG_SYMBOLS"
536 CXXFLAGS_JDK="$CXXFLAGS_JDK $CXXFLAGS_DEBUG_SYMBOLS"
537 C_O_FLAG_HI="$C_O_FLAG_NORM"
538 C_O_FLAG_NORM="$C_O_FLAG_NORM"
539 CXX_O_FLAG_HI="$CXX_O_FLAG_NORM"
540 CXX_O_FLAG_NORM="$CXX_O_FLAG_NORM"
541 JAVAC_FLAGS="$JAVAC_FLAGS -g"
542 ;;
543 slowdebug )
544 CFLAGS_JDK="$CFLAGS_JDK $CFLAGS_DEBUG_SYMBOLS"
545 CXXFLAGS_JDK="$CXXFLAGS_JDK $CXXFLAGS_DEBUG_SYMBOLS"
546 C_O_FLAG_HI="$C_O_FLAG_NONE"
547 C_O_FLAG_NORM="$C_O_FLAG_NONE"
548 CXX_O_FLAG_HI="$CXX_O_FLAG_NONE"
549 CXX_O_FLAG_NORM="$CXX_O_FLAG_NONE"
550 JAVAC_FLAGS="$JAVAC_FLAGS -g"
551 ;;
552 esac
554 # Setup LP64
555 CCXXFLAGS_JDK="$CCXXFLAGS_JDK $ADD_LP64"
557 # Set some common defines. These works for all compilers, but assume
558 # -D is universally accepted.
560 # Setup endianness
561 if test "x$OPENJDK_TARGET_CPU_ENDIAN" = xlittle; then
562 # The macro _LITTLE_ENDIAN needs to be defined the same to avoid the
563 # Sun C compiler warning message: warning: macro redefined: _LITTLE_ENDIAN
564 # (The Solaris X86 system defines this in file /usr/include/sys/isa_defs.h).
565 # Note: -Dmacro is the same as #define macro 1
566 # -Dmacro= is the same as #define macro
567 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
568 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_LITTLE_ENDIAN="
569 else
570 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_LITTLE_ENDIAN"
571 fi
572 else
573 # Same goes for _BIG_ENDIAN. Do we really need to set *ENDIAN on Solaris if they
574 # are defined in the system?
575 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
576 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_BIG_ENDIAN="
577 else
578 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_BIG_ENDIAN"
579 fi
580 fi
581 if test "x$OPENJDK_TARGET_CPU" = xppc64le; then
582 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DABI_ELFv2"
583 fi
585 # Setup target OS define. Use OS target name but in upper case.
586 OPENJDK_TARGET_OS_UPPERCASE=`$ECHO $OPENJDK_TARGET_OS | $TR 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
587 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D$OPENJDK_TARGET_OS_UPPERCASE"
589 # Setup target CPU
590 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DARCH='\"$OPENJDK_TARGET_CPU_LEGACY\"' -D$OPENJDK_TARGET_CPU_LEGACY"
592 # Setup debug/release defines
593 if test "x$DEBUG_LEVEL" = xrelease; then
594 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DNDEBUG"
595 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
596 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DTRIMMED"
597 fi
598 else
599 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DDEBUG"
600 fi
602 # Setup release name
603 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DRELEASE='\"\$(RELEASE)\"'"
606 # Set some additional per-OS defines.
607 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
608 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_ALLBSD_SOURCE -D_DARWIN_UNLIMITED_SELECT"
609 elif test "x$OPENJDK_TARGET_OS" = xaix; then
610 # FIXME: PPC64 should not be here.
611 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DPPC64"
612 elif test "x$OPENJDK_TARGET_OS" = xbsd; then
613 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_ALLBSD_SOURCE"
614 fi
616 # Additional macosx handling
617 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
618 if test "x$TOOLCHAIN_TYPE" = xgcc; then
619 # FIXME: This needs to be exported in spec.gmk due to closed legacy code.
620 # FIXME: clean this up, and/or move it elsewhere.
622 # Setting these parameters makes it an error to link to macosx APIs that are
623 # newer than the given OS version and makes the linked binaries compatible
624 # even if built on a newer version of the OS.
625 # The expected format is X.Y.Z
626 MACOSX_VERSION_MIN=10.7.0
627 AC_SUBST(MACOSX_VERSION_MIN)
629 # The macro takes the version with no dots, ex: 1070
630 # Let the flags variables get resolved in make for easier override on make
631 # command line.
632 CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DMAC_OS_X_VERSION_MAX_ALLOWED=\$(subst .,,\$(MACOSX_VERSION_MIN)) -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"
633 LDFLAGS_JDK="$LDFLAGS_JDK -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"
634 fi
635 fi
637 # Setup some hard coded includes
638 CCXXFLAGS_JDK="$CCXXFLAGS_JDK \
639 -I${JDK_OUTPUTDIR}/include \
640 -I${JDK_OUTPUTDIR}/include/$OPENJDK_TARGET_OS \
641 -I${JDK_TOPDIR}/src/share/javavm/export \
642 -I${JDK_TOPDIR}/src/$OPENJDK_TARGET_OS_EXPORT_DIR/javavm/export \
643 -I${JDK_TOPDIR}/src/share/native/common \
644 -I${JDK_TOPDIR}/src/$OPENJDK_TARGET_OS_API_DIR/native/common"
646 # The shared libraries are compiled using the picflag.
647 CFLAGS_JDKLIB="$CCXXFLAGS_JDK $CFLAGS_JDK $PICFLAG $CFLAGS_JDKLIB_EXTRA"
648 CXXFLAGS_JDKLIB="$CCXXFLAGS_JDK $CXXFLAGS_JDK $PICFLAG $CXXFLAGS_JDKLIB_EXTRA "
650 # Executable flags
651 CFLAGS_JDKEXE="$CCXXFLAGS_JDK $CFLAGS_JDK"
652 CXXFLAGS_JDKEXE="$CCXXFLAGS_JDK $CXXFLAGS_JDK"
654 AC_SUBST(CFLAGS_JDKLIB)
655 AC_SUBST(CFLAGS_JDKEXE)
656 AC_SUBST(CXXFLAGS_JDKLIB)
657 AC_SUBST(CXXFLAGS_JDKEXE)
659 # Setup LDFLAGS et al.
660 #
661 # Now this is odd. The JDK native libraries have to link against libjvm.so
662 # On 32-bit machines there is normally two distinct libjvm.so:s, client and server.
663 # Which should we link to? Are we lucky enough that the binary api to the libjvm.so library
664 # is identical for client and server? Yes. Which is picked at runtime (client or server)?
665 # Neither, since the chosen libjvm.so has already been loaded by the launcher, all the following
666 # libraries will link to whatever is in memory. Yuck.
667 #
668 # Thus we offer the compiler to find libjvm.so first in server then in client. It works. Ugh.
669 if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
670 LDFLAGS_JDK="$LDFLAGS_JDK -nologo -opt:ref -incremental:no"
671 if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then
672 LDFLAGS_JDK="$LDFLAGS_JDK -safeseh"
673 fi
674 # TODO: make -debug optional "--disable-full-debug-symbols"
675 LDFLAGS_JDK="$LDFLAGS_JDK -debug"
676 LDFLAGS_JDKLIB="${LDFLAGS_JDK} -dll -libpath:${JDK_OUTPUTDIR}/lib"
677 LDFLAGS_JDKLIB_SUFFIX=""
678 if test "x$OPENJDK_TARGET_CPU_BITS" = "x64"; then
679 LDFLAGS_STACK_SIZE=1048576
680 else
681 LDFLAGS_STACK_SIZE=327680
682 fi
683 LDFLAGS_JDKEXE="${LDFLAGS_JDK} /STACK:$LDFLAGS_STACK_SIZE"
684 else
685 if test "x$TOOLCHAIN_TYPE" = xgcc; then
686 # If this is a --hash-style=gnu system, use --hash-style=both, why?
687 # We have previously set HAS_GNU_HASH if this is the case
688 if test -n "$HAS_GNU_HASH"; then
689 LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker --hash-style=both "
690 fi
691 if test "x$OPENJDK_TARGET_OS" = xlinux; then
692 # And since we now know that the linker is gnu, then add:
693 # -z defs, to forbid undefined symbols in object files
694 # -z noexecstack, to mark stack regions as non-executable
695 LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker -z -Xlinker defs -Xlinker -z -Xlinker noexecstack"
696 if test "x$DEBUG_LEVEL" = "xrelease"; then
697 # When building release libraries, tell the linker optimize them.
698 # Should this be supplied to the OSS linker as well?
699 LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker -O1"
700 fi
701 fi
702 fi
704 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
705 LDFLAGS_JDK="$LDFLAGS_JDK -z defs -xildoff -ztext"
706 LDFLAGS_CXX_JDK="$LDFLAGS_CXX_JDK -norunpath -xnolib"
707 fi
709 LDFLAGS_JDKLIB="${LDFLAGS_JDK} $SHARED_LIBRARY_FLAGS \
710 -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}"
712 # On some platforms (mac) the linker warns about non existing -L dirs.
713 # Add server first if available. Linking aginst client does not always produce the same results.
714 # Only add client dir if client is being built. Add minimal (note not minimal1) if only building minimal1.
715 # Default to server for other variants.
716 if test "x$JVM_VARIANT_SERVER" = xtrue; then
717 LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/server"
718 elif test "x$JVM_VARIANT_CLIENT" = xtrue; then
719 LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/client"
720 elif test "x$JVM_VARIANT_MINIMAL1" = xtrue; then
721 LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/minimal"
722 else
723 LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/server"
724 fi
726 LDFLAGS_JDKLIB_SUFFIX="-ljava -ljvm"
727 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
728 LDFLAGS_JDKLIB_SUFFIX="$LDFLAGS_JDKLIB_SUFFIX -lc"
729 fi
731 LDFLAGS_JDKEXE="${LDFLAGS_JDK}"
732 if test "x$OPENJDK_TARGET_OS" = xlinux; then
733 LDFLAGS_JDKEXE="$LDFLAGS_JDKEXE -Xlinker --allow-shlib-undefined"
734 fi
735 fi
736 AC_SUBST(LDFLAGS_JDKLIB)
737 AC_SUBST(LDFLAGS_JDKEXE)
738 AC_SUBST(LDFLAGS_JDKLIB_SUFFIX)
739 AC_SUBST(LDFLAGS_JDKEXE_SUFFIX)
740 AC_SUBST(LDFLAGS_CXX_JDK)
741 ])
744 # FLAGS_C_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
745 # [RUN-IF-FALSE])
746 # ------------------------------------------------------------
747 # Check that the C compiler supports an argument
748 AC_DEFUN([FLAGS_C_COMPILER_CHECK_ARGUMENTS],
749 [
750 AC_MSG_CHECKING([if the C compiler supports "$1"])
751 supports=yes
753 saved_cflags="$CFLAGS"
754 CFLAGS="$CFLAGS $1"
755 AC_LANG_PUSH([C])
756 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [],
757 [supports=no])
758 AC_LANG_POP([C])
759 CFLAGS="$saved_cflags"
761 AC_MSG_RESULT([$supports])
762 if test "x$supports" = "xyes" ; then
763 m4_ifval([$2], [$2], [:])
764 else
765 m4_ifval([$3], [$3], [:])
766 fi
767 ])
769 # FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
770 # [RUN-IF-FALSE])
771 # ------------------------------------------------------------
772 # Check that the C++ compiler supports an argument
773 AC_DEFUN([FLAGS_CXX_COMPILER_CHECK_ARGUMENTS],
774 [
775 AC_MSG_CHECKING([if the C++ compiler supports "$1"])
776 supports=yes
778 saved_cxxflags="$CXXFLAGS"
779 CXXFLAGS="$CXXFLAG $1"
780 AC_LANG_PUSH([C++])
781 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [],
782 [supports=no])
783 AC_LANG_POP([C++])
784 CXXFLAGS="$saved_cxxflags"
786 AC_MSG_RESULT([$supports])
787 if test "x$supports" = "xyes" ; then
788 m4_ifval([$2], [$2], [:])
789 else
790 m4_ifval([$3], [$3], [:])
791 fi
792 ])
794 # FLAGS_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
795 # [RUN-IF-FALSE])
796 # ------------------------------------------------------------
797 # Check that the C and C++ compilers support an argument
798 AC_DEFUN([FLAGS_COMPILER_CHECK_ARGUMENTS],
799 [
800 FLAGS_C_COMPILER_CHECK_ARGUMENTS([$1],
801 [C_COMP_SUPPORTS="yes"],
802 [C_COMP_SUPPORTS="no"])
803 FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([$1],
804 [CXX_COMP_SUPPORTS="yes"],
805 [CXX_COMP_SUPPORTS="no"])
807 AC_MSG_CHECKING([if both compilers support "$1"])
808 supports=no
809 if test "x$C_COMP_SUPPORTS" = "xyes" -a "x$CXX_COMP_SUPPORTS" = "xyes"; then supports=yes; fi
811 AC_MSG_RESULT([$supports])
812 if test "x$supports" = "xyes" ; then
813 m4_ifval([$2], [$2], [:])
814 else
815 m4_ifval([$3], [$3], [:])
816 fi
817 ])
819 AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_MISC],
820 [
821 # Some Zero and Shark settings.
822 # ZERO_ARCHFLAG tells the compiler which mode to build for
823 case "${OPENJDK_TARGET_CPU}" in
824 s390)
825 ZERO_ARCHFLAG="${COMPILER_TARGET_BITS_FLAG}31"
826 ;;
827 *)
828 ZERO_ARCHFLAG="${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}"
829 esac
830 FLAGS_COMPILER_CHECK_ARGUMENTS([$ZERO_ARCHFLAG], [], [ZERO_ARCHFLAG=""])
831 AC_SUBST(ZERO_ARCHFLAG)
833 # Check that the compiler supports -mX (or -qX on AIX) flags
834 # Set COMPILER_SUPPORTS_TARGET_BITS_FLAG to 'true' if it does
835 FLAGS_COMPILER_CHECK_ARGUMENTS([${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}],
836 [COMPILER_SUPPORTS_TARGET_BITS_FLAG=true],
837 [COMPILER_SUPPORTS_TARGET_BITS_FLAG=false])
838 AC_SUBST(COMPILER_SUPPORTS_TARGET_BITS_FLAG)
839 ])
841 AC_DEFUN_ONCE([FLAGS_SETUP_GCC6_COMPILER_FLAGS],
842 [
843 # These flags are required for GCC 6 builds as undefined behaviour in OpenJDK code
844 # runs afoul of the more aggressive versions of these optimisations.
845 # Notably, value range propagation now assumes that the this pointer of C++
846 # member functions is non-null.
847 NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks"
848 FLAGS_COMPILER_CHECK_ARGUMENTS([$NO_DELETE_NULL_POINTER_CHECKS_CFLAG -Werror],
849 [], [NO_DELETE_NULL_POINTER_CHECKS_CFLAG=""])
850 AC_SUBST([NO_DELETE_NULL_POINTER_CHECKS_CFLAG])
851 NO_LIFETIME_DSE_CFLAG="-fno-lifetime-dse"
852 FLAGS_COMPILER_CHECK_ARGUMENTS([$NO_LIFETIME_DSE_CFLAG -Werror],
853 [], [NO_LIFETIME_DSE_CFLAG=""])
854 CFLAGS_JDK="${CFLAGS_JDK} ${NO_DELETE_NULL_POINTER_CHECKS_CFLAG} ${NO_LIFETIME_DSE_CFLAG}"
855 AC_SUBST([NO_LIFETIME_DSE_CFLAG])
856 ])
