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 #
28 # Setup flags for C/C++ compiler
29 #
30
31 ###############################################################################
32 #
33 # How to compile shared libraries.
34 #
35 AC_DEFUN([FLAGS_SETUP_SHARED_LIBS],
36 [
37 if test "x$TOOLCHAIN_TYPE" = xgcc; then
38 C_FLAG_REORDER=''
39
40 # Default works for linux, might work on other platforms as well.
41 SHARED_LIBRARY_FLAGS='-shared'
42 SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1'
43 SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN"
44 SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1'
45 SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1'
46
47 elif test "x$TOOLCHAIN_TYPE" = xclang; then
48 C_FLAG_REORDER=''
49
50 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
51 # Linking is different on MacOSX
52 SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0"
53 SET_EXECUTABLE_ORIGIN='-Wl,-rpath,@loader_path$(or [$]1,/.)'
54 SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
55 SET_SHARED_LIBRARY_NAME='-Wl,-install_name,@rpath/[$]1'
56 SET_SHARED_LIBRARY_MAPFILE='-Wl,-exported_symbols_list,[$]1'
57
58 else
59 # Default works for linux, might work on other platforms as well.
60 SHARED_LIBRARY_FLAGS='-shared'
61 SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1'
62 SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1'
63 SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1'
64
65 # arm specific settings
66 if test "x$OPENJDK_TARGET_CPU" = "xarm"; then
67 # '-Wl,-z,origin' isn't used on arm.
68 SET_SHARED_LIBRARY_ORIGIN='-Wl,-rpath,\$$$$ORIGIN[$]1'
69 else
70 SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN"
71 fi
72 fi
73
74 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
75 C_FLAG_REORDER='-xF'
76 SHARED_LIBRARY_FLAGS="-G"
77 SET_EXECUTABLE_ORIGIN='-R\$$ORIGIN[$]1'
78 SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
79 SET_SHARED_LIBRARY_NAME='-h [$]1'
80 SET_SHARED_LIBRARY_MAPFILE='-M[$]1'
81
82 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
83 C_FLAG_REORDER=''
84 SHARED_LIBRARY_FLAGS="-qmkshrobj -bM:SRE -bnoentry"
85 SET_EXECUTABLE_ORIGIN=""
86 SET_SHARED_LIBRARY_ORIGIN=''
87 SET_SHARED_LIBRARY_NAME=''
88 SET_SHARED_LIBRARY_MAPFILE=''
89
90 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
91 C_FLAG_REORDER=''
92 SHARED_LIBRARY_FLAGS="-dll"
93 SET_EXECUTABLE_ORIGIN=''
94 SET_SHARED_LIBRARY_ORIGIN=''
95 SET_SHARED_LIBRARY_NAME=''
96 SET_SHARED_LIBRARY_MAPFILE='-def:[$]1'
97 fi
98
99 AC_SUBST(C_FLAG_REORDER)
100 AC_SUBST(SET_EXECUTABLE_ORIGIN)
101 AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)
102 AC_SUBST(SET_SHARED_LIBRARY_NAME)
103 AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)
104 AC_SUBST(SHARED_LIBRARY_FLAGS)
105 ])
106
107 AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],
108 [
109 # By default don't set any specific assembler debug
110 # info flags for toolchains unless we know they work.
111 # See JDK-8207057.
112 ASFLAGS_DEBUG_SYMBOLS=""
113 # Debug symbols
114 if test "x$TOOLCHAIN_TYPE" = xgcc; then
115 CFLAGS_DEBUG_SYMBOLS="-g"
116 ASFLAGS_DEBUG_SYMBOLS="-g"
117 elif test "x$TOOLCHAIN_TYPE" = xclang; then
118 CFLAGS_DEBUG_SYMBOLS="-g"
119 ASFLAGS_DEBUG_SYMBOLS="-g"
120 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
121 # -g0 enables debug symbols without disabling inlining.
122 CFLAGS_DEBUG_SYMBOLS="-g0 -xs"
123 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
124 CFLAGS_DEBUG_SYMBOLS="-g"
125 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
126 CFLAGS_DEBUG_SYMBOLS="-Z7 -d2Zi+"
127 fi
128
129 AC_SUBST(CFLAGS_DEBUG_SYMBOLS)
130 AC_SUBST(ASFLAGS_DEBUG_SYMBOLS)
131 ])
132
133 AC_DEFUN([FLAGS_SETUP_WARNINGS],
134 [
135 AC_ARG_ENABLE([warnings-as-errors], [AS_HELP_STRING([--disable-warnings-as-errors],
136 [do not consider native warnings to be an error @<:@enabled@:>@])])
137
138 # Set default value.
139 if test "x$TOOLCHAIN_TYPE" = xxlc; then
140 WARNINGS_AS_ERRORS=false
141 else
142 WARNINGS_AS_ERRORS=true
143 fi
144
145 AC_MSG_CHECKING([if native warnings are errors])
146 if test "x$enable_warnings_as_errors" = "xyes"; then
147 AC_MSG_RESULT([yes (explicitly set)])
148 WARNINGS_AS_ERRORS=true
149 elif test "x$enable_warnings_as_errors" = "xno"; then
150 AC_MSG_RESULT([no (explicitly set)])
151 WARNINGS_AS_ERRORS=false
152 elif test "x$enable_warnings_as_errors" = "x"; then
153 AC_MSG_RESULT([${WARNINGS_AS_ERRORS} (default)])
154 else
155 AC_MSG_ERROR([--enable-warnings-as-errors accepts no argument])
156 fi
157
158 AC_SUBST(WARNINGS_AS_ERRORS)
159
160 case "${TOOLCHAIN_TYPE}" in
161 microsoft)
162 DISABLE_WARNING_PREFIX="-wd"
163 CFLAGS_WARNINGS_ARE_ERRORS="-WX"
164
165 WARNINGS_ENABLE_ALL="-W3"
166 DISABLED_WARNINGS="4800"
167 ;;
168
169 solstudio)
170 DISABLE_WARNING_PREFIX="-erroff="
171 CFLAGS_WARNINGS_ARE_ERRORS="-errwarn=%all"
172
173 WARNINGS_ENABLE_ALL_CFLAGS="-v"
174 WARNINGS_ENABLE_ALL_CXXFLAGS="+w"
175
176 DISABLED_WARNINGS_C=""
177 DISABLED_WARNINGS_CXX=""
178 ;;
179
180 gcc)
181 DISABLE_WARNING_PREFIX="-Wno-"
182 CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
183
184 # Additional warnings that are not activated by -Wall and -Wextra
185 WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wsign-compare \
186 -Wunused-function -Wundef -Wunused-value -Wreturn-type \
187 -Wtrampolines"
188 WARNINGS_ENABLE_ADDITIONAL_CXX="-Woverloaded-virtual -Wreorder"
189 WARNINGS_ENABLE_ALL_CFLAGS="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL"
190 WARNINGS_ENABLE_ALL_CXXFLAGS="$WARNINGS_ENABLE_ALL_CFLAGS $WARNINGS_ENABLE_ADDITIONAL_CXX"
191
192 DISABLED_WARNINGS="unused-parameter unused"
193
194 # Repeate the check for the BUILD_CC and BUILD_CXX. Need to also reset
195 # CFLAGS since any target specific flags will likely not work with the
196 # build compiler
197 CC_OLD="$CC"
198 CXX_OLD="$CXX"
199 CC="$BUILD_CC"
200 CXX="$BUILD_CXX"
201 CFLAGS_OLD="$CFLAGS"
202 CFLAGS=""
203 BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-"
204 CC="$CC_OLD"
205 CXX="$CXX_OLD"
206 CFLAGS="$CFLAGS_OLD"
207 ;;
208
209 clang)
210 DISABLE_WARNING_PREFIX="-Wno-"
211 CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
212
213 # Additional warnings that are not activated by -Wall and -Wextra
214 WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wsign-compare -Wreorder \
215 -Wunused-function -Wundef -Wunused-value -Woverloaded-virtual"
216 WARNINGS_ENABLE_ALL="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL"
217
218 DISABLED_WARNINGS="unused-parameter unused"
219
220 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
221 # missing-method-return-type triggers in JavaNativeFoundation framework
222 DISABLED_WARNINGS="$DISABLED_WARNINGS missing-method-return-type"
223 fi
224
225 ;;
226
227 xlc)
228 DISABLE_WARNING_PREFIX="-qsuppress="
229 CFLAGS_WARNINGS_ARE_ERRORS="-qhalt=w"
230
231 # Possibly a better subset than "all" is "lan:trx:ret:zea:cmp:ret"
232 WARNINGS_ENABLE_ALL="-qinfo=all -qformat=all"
233 DISABLED_WARNINGS=""
234 ;;
235 esac
236 AC_SUBST(DISABLE_WARNING_PREFIX)
237 AC_SUBST(BUILD_CC_DISABLE_WARNING_PREFIX)
238 AC_SUBST(CFLAGS_WARNINGS_ARE_ERRORS)
239 AC_SUBST(DISABLED_WARNINGS)
240 AC_SUBST(DISABLED_WARNINGS_C)
241 AC_SUBST(DISABLED_WARNINGS_CXX)
242 ])
243
244 AC_DEFUN([FLAGS_SETUP_QUALITY_CHECKS],
245 [
246 # bounds, memory and behavior checking options
247 if test "x$TOOLCHAIN_TYPE" = xgcc; then
248 case $DEBUG_LEVEL in
249 release )
250 # no adjustment
251 ;;
252 fastdebug )
253 # no adjustment
254 ;;
255 slowdebug )
256 # FIXME: By adding this to C(XX)FLAGS_DEBUG_OPTIONS/JVM_CFLAGS_SYMBOLS it
257 # get's added conditionally on whether we produce debug symbols or not.
258 # This is most likely not really correct.
259
260 # Add runtime stack smashing and undefined behavior checks.
261 CFLAGS_DEBUG_OPTIONS="-fstack-protector-all --param ssp-buffer-size=1"
262 CXXFLAGS_DEBUG_OPTIONS="-fstack-protector-all --param ssp-buffer-size=1"
263
264 JVM_CFLAGS_SYMBOLS="$JVM_CFLAGS_SYMBOLS -fstack-protector-all --param ssp-buffer-size=1"
265 ;;
266 esac
267 fi
268 ])
269
270 AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
271 [
272 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
273 CC_HIGHEST="-fns -fsimple -fsingle -xbuiltin=%all -xdepend -xrestrict -xlibmil"
274
275 C_O_FLAG_HIGHEST_JVM="-xO4"
276 C_O_FLAG_DEBUG_JVM=""
277 C_O_FLAG_SIZE=""
278 C_O_FLAG_DEBUG=""
279 C_O_FLAG_NONE=""
280 if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86"; then
281 C_O_FLAG_HIGHEST="-xO4 -Wu,-O4~yz $CC_HIGHEST"
282 C_O_FLAG_HI="-xO4 -Wu,-O4~yz"
283 C_O_FLAG_NORM="-xO2 -Wu,-O2~yz"
284 elif test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then
285 C_O_FLAG_HIGHEST="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0 \
286 -xprefetch=auto,explicit $CC_HIGHEST"
287 C_O_FLAG_HI="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0"
288 C_O_FLAG_NORM="-xO2 -Wc,-Qrm-s -Wc,-Qiselect-T0"
289 fi
290 elif test "x$TOOLCHAIN_TYPE" = xgcc; then
291 C_O_FLAG_HIGHEST_JVM="-O3"
292 C_O_FLAG_HIGHEST="-O3"
293 C_O_FLAG_HI="-O3"
294 C_O_FLAG_NORM="-O2"
295 C_O_FLAG_SIZE="-Os"
296 C_O_FLAG_DEBUG="-O0"
297 C_O_FLAG_DEBUG_JVM="-O0"
298 C_O_FLAG_NONE="-O0"
299 elif test "x$TOOLCHAIN_TYPE" = xclang; then
300 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
301 # On MacOSX we optimize for size, something
302 # we should do for all platforms?
303 C_O_FLAG_HIGHEST_JVM="-Os"
304 C_O_FLAG_HIGHEST="-Os"
305 C_O_FLAG_HI="-Os"
306 C_O_FLAG_NORM="-Os"
307 C_O_FLAG_DEBUG_JVM=""
308 else
309 C_O_FLAG_HIGHEST_JVM="-O3"
310 C_O_FLAG_HIGHEST="-O3"
311 C_O_FLAG_HI="-O3"
312 C_O_FLAG_NORM="-O2"
313 C_O_FLAG_DEBUG_JVM="-O0"
314 fi
315 C_O_FLAG_SIZE="-Os"
316 C_O_FLAG_DEBUG="-O0"
317 C_O_FLAG_NONE="-O0"
318 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
319 C_O_FLAG_HIGHEST_JVM="-O3 -qhot=level=1 -qinline -qinlglue"
320 C_O_FLAG_HIGHEST="-O3 -qhot=level=1 -qinline -qinlglue"
321 C_O_FLAG_HI="-O3 -qinline -qinlglue"
322 C_O_FLAG_NORM="-O2"
323 C_O_FLAG_DEBUG="-qnoopt"
324 # FIXME: Value below not verified.
325 C_O_FLAG_DEBUG_JVM=""
326 C_O_FLAG_NONE="-qnoopt"
327 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
328 C_O_FLAG_HIGHEST_JVM="-O2 -Oy-"
329 C_O_FLAG_HIGHEST="-O2"
330 C_O_FLAG_HI="-O1"
331 C_O_FLAG_NORM="-O1"
332 C_O_FLAG_DEBUG="-Od"
333 C_O_FLAG_DEBUG_JVM=""
334 C_O_FLAG_NONE="-Od"
335 C_O_FLAG_SIZE="-Os"
336 fi
337
338 # Now copy to C++ flags
339 CXX_O_FLAG_HIGHEST_JVM="$C_O_FLAG_HIGHEST_JVM"
340 CXX_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST"
341 CXX_O_FLAG_HI="$C_O_FLAG_HI"
342 CXX_O_FLAG_NORM="$C_O_FLAG_NORM"
343 CXX_O_FLAG_DEBUG="$C_O_FLAG_DEBUG"
344 CXX_O_FLAG_DEBUG_JVM="$C_O_FLAG_DEBUG_JVM"
345 CXX_O_FLAG_NONE="$C_O_FLAG_NONE"
346 CXX_O_FLAG_SIZE="$C_O_FLAG_SIZE"
347
348 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
349 # In solstudio, also add this to C (but not C++) flags...
350 C_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST -xalias_level=basic"
351 fi
352
353 # Adjust optimization flags according to debug level.
354 case $DEBUG_LEVEL in
355 release )
356 # no adjustment
357 ;;
358 fastdebug )
359 # Not quite so much optimization
360 C_O_FLAG_HI="$C_O_FLAG_NORM"
361 CXX_O_FLAG_HI="$CXX_O_FLAG_NORM"
362 ;;
363 slowdebug )
364 # Disable optimization
365 C_O_FLAG_HIGHEST_JVM="$C_O_FLAG_DEBUG_JVM"
366 C_O_FLAG_HIGHEST="$C_O_FLAG_DEBUG"
367 C_O_FLAG_HI="$C_O_FLAG_DEBUG"
368 C_O_FLAG_NORM="$C_O_FLAG_DEBUG"
369 C_O_FLAG_SIZE="$C_O_FLAG_DEBUG"
370 CXX_O_FLAG_HIGHEST_JVM="$CXX_O_FLAG_DEBUG_JVM"
371 CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_DEBUG"
372 CXX_O_FLAG_HI="$CXX_O_FLAG_DEBUG"
373 CXX_O_FLAG_NORM="$CXX_O_FLAG_DEBUG"
374 CXX_O_FLAG_SIZE="$CXX_O_FLAG_DEBUG"
375 ;;
376 esac
377
378 AC_SUBST(C_O_FLAG_HIGHEST_JVM)
379 AC_SUBST(C_O_FLAG_HIGHEST)
380 AC_SUBST(C_O_FLAG_HI)
381 AC_SUBST(C_O_FLAG_NORM)
382 AC_SUBST(C_O_FLAG_NONE)
383 AC_SUBST(C_O_FLAG_SIZE)
384 AC_SUBST(CXX_O_FLAG_HIGHEST_JVM)
385 AC_SUBST(CXX_O_FLAG_HIGHEST)
386 AC_SUBST(CXX_O_FLAG_HI)
387 AC_SUBST(CXX_O_FLAG_NORM)
388 AC_SUBST(CXX_O_FLAG_NONE)
389 AC_SUBST(CXX_O_FLAG_SIZE)
390 ])
391
392 AC_DEFUN([FLAGS_SETUP_CFLAGS],
393 [
394 ### CFLAGS
395
396 FLAGS_SETUP_CFLAGS_HELPER
397
398 FLAGS_OS=$OPENJDK_TARGET_OS
399 FLAGS_OS_TYPE=$OPENJDK_TARGET_OS_TYPE
400 FLAGS_CPU=$OPENJDK_TARGET_CPU
401 FLAGS_CPU_ARCH=$OPENJDK_TARGET_CPU_ARCH
402 FLAGS_CPU_BITS=$OPENJDK_TARGET_CPU_BITS
403 FLAGS_CPU_ENDIAN=$OPENJDK_TARGET_CPU_ENDIAN
404 FLAGS_CPU_LEGACY=$OPENJDK_TARGET_CPU_LEGACY
405 FLAGS_CPU_LEGACY_LIB=$OPENJDK_TARGET_CPU_LEGACY_LIB
406
407 FLAGS_SETUP_CFLAGS_CPU_DEP([TARGET])
408
409 FLAGS_OS=$OPENJDK_BUILD_OS
410 FLAGS_OS_TYPE=$OPENJDK_BUILD_OS_TYPE
411 FLAGS_CPU=$OPENJDK_BUILD_CPU
412 FLAGS_CPU_ARCH=$OPENJDK_BUILD_CPU_ARCH
413 FLAGS_CPU_BITS=$OPENJDK_BUILD_CPU_BITS
414 FLAGS_CPU_ENDIAN=$OPENJDK_BUILD_CPU_ENDIAN
415 FLAGS_CPU_LEGACY=$OPENJDK_BUILD_CPU_LEGACY
416 FLAGS_CPU_LEGACY_LIB=$OPENJDK_BUILD_CPU_LEGACY_LIB
417
418 FLAGS_SETUP_CFLAGS_CPU_DEP([BUILD], [OPENJDK_BUILD_], [BUILD_])
419 ])
420
421 ################################################################################
422 # platform independent
423 AC_DEFUN([FLAGS_SETUP_CFLAGS_HELPER],
424 [
425 #### OS DEFINES, these should be independent on toolchain
426 if test "x$OPENJDK_TARGET_OS" = xlinux; then
427 CFLAGS_OS_DEF_JVM="-DLINUX"
428 CFLAGS_OS_DEF_JDK="-D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE"
429 elif test "x$OPENJDK_TARGET_OS" = xsolaris; then
430 CFLAGS_OS_DEF_JVM="-DSOLARIS"
431 CFLAGS_OS_DEF_JDK="-D__solaris__"
432 elif test "x$OPENJDK_TARGET_OS" = xmacosx; then
433 CFLAGS_OS_DEF_JVM="-D_ALLBSD_SOURCE -D_DARWIN_C_SOURCE -D_XOPEN_SOURCE"
434 CFLAGS_OS_DEF_JDK="-D_ALLBSD_SOURCE -D_DARWIN_UNLIMITED_SELECT"
435 elif test "x$OPENJDK_TARGET_OS" = xaix; then
436 CFLAGS_OS_DEF_JVM="-DAIX"
437 elif test "x$OPENJDK_TARGET_OS" = xbsd; then
438 CFLAGS_OS_DEF_JDK="-D_ALLBSD_SOURCE"
439 elif test "x$OPENJDK_TARGET_OS" = xwindows; then
440 CFLAGS_OS_DEF_JVM="-D_WINDOWS -DWIN32 -D_JNI_IMPLEMENTATION_"
441 fi
442
443 CFLAGS_OS_DEF_JDK="$CFLAGS_OS_DEF_JDK -D$OPENJDK_TARGET_OS_UPPERCASE"
444
445 #### GLOBAL DEFINES
446 # Set some common defines. These works for all compilers, but assume
447 # -D is universally accepted.
448
449 # Always enable optional macros for VM.
450 ALWAYS_CFLAGS_JVM="-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS"
451
452 # Setup some hard coded includes
453 ALWAYS_CFLAGS_JDK=" \
454 -I\$(SUPPORT_OUTPUTDIR)/modules_include/java.base \
455 -I\$(SUPPORT_OUTPUTDIR)/modules_include/java.base/\$(OPENJDK_TARGET_OS_INCLUDE_SUBDIR) \
456 -I${TOPDIR}/src/java.base/share/native/libjava \
457 -I${TOPDIR}/src/java.base/$OPENJDK_TARGET_OS_TYPE/native/libjava \
458 -I${TOPDIR}/src/hotspot/share/include \
459 -I${TOPDIR}/src/hotspot/os/${HOTSPOT_TARGET_OS_TYPE}/include"
460
461 ###############################################################################
462
463 # Adjust flags according to debug level.
464 # Setup debug/release defines
465 if test "x$DEBUG_LEVEL" = xrelease; then
466 DEBUG_CFLAGS_JDK="-DNDEBUG"
467 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
468 DEBUG_CFLAGS_JDK="$DEBUG_CFLAGS_JDK -DTRIMMED"
469 fi
470 else
471 DEBUG_CFLAGS_JDK="-DDEBUG"
472
473 if test "x$TOOLCHAIN_TYPE" = xxlc; then
474 # We need '-qminimaltoc' or '-qpic=large -bbigtoc' if the TOC overflows.
475 # Hotspot now overflows its 64K TOC (currently only for debug),
476 # so for debug we build with '-qpic=large -bbigtoc'.
477 DEBUG_CFLAGS_JVM="-qpic=large"
478 fi
479 fi
480
481 if test "x$DEBUG_LEVEL" != xrelease; then
482 DEBUG_OPTIONS_FLAGS_JDK="$CFLAGS_DEBUG_OPTIONS"
483 DEBUG_SYMBOLS_CFLAGS_JDK="$CFLAGS_DEBUG_SYMBOLS"
484 fi
485
486 #### TOOLCHAIN DEFINES
487
488 if test "x$TOOLCHAIN_TYPE" = xgcc; then
489 ALWAYS_DEFINES_JVM="-D_GNU_SOURCE -D_REENTRANT"
490 elif test "x$TOOLCHAIN_TYPE" = xclang; then
491 ALWAYS_DEFINES_JVM="-D_GNU_SOURCE"
492 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
493 ALWAYS_DEFINES_JVM="-DSPARC_WORKS -D_Crun_inline_placement"
494 ALWAYS_DEFINES_JDK="-DTRACING -DMACRO_MEMSYS_OPS -DBREAKPTS"
495 ALWAYS_DEFINES_JDK_CXXONLY="-DCC_NOEX"
496 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
497 ALWAYS_DEFINES_JVM="-D_REENTRANT"
498 ALWAYS_DEFINES_JDK="-D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"
499 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
500 ALWAYS_DEFINES_JDK="-DWIN32_LEAN_AND_MEAN -D_CRT_SECURE_NO_DEPRECATE \
501 -D_CRT_NONSTDC_NO_DEPRECATE -DWIN32 -DIAL"
502 ALWAYS_DEFINES_JVM="-DNOMINMAX -DWIN32_LEAN_AND_MEAN"
503 fi
504
505 ###############################################################################
506 #
507 #
508 # CFLAGS BASIC
509 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
510 # COMMON to gcc and clang
511 TOOLCHAIN_CFLAGS_JVM="-pipe -fno-rtti -fno-exceptions \
512 -fvisibility=hidden -fno-strict-aliasing -fno-omit-frame-pointer"
513 fi
514
515 if test "x$TOOLCHAIN_TYPE" = xgcc; then
516 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -fcheck-new -fstack-protector"
517 TOOLCHAIN_CFLAGS_JDK="-pipe -fstack-protector"
518 # technically NOT for CXX (but since this gives *worse* performance, use
519 # no-strict-aliasing everywhere!)
520 TOOLCHAIN_CFLAGS_JDK_CONLY="-fno-strict-aliasing"
521
522 elif test "x$TOOLCHAIN_TYPE" = xclang; then
523 # Restrict the debug information created by Clang to avoid
524 # too big object files and speed the build up a little bit
525 # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
526 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -flimit-debug-info"
527
528 # In principle the stack alignment below is cpu- and ABI-dependent and
529 # should agree with values of StackAlignmentInBytes in various
530 # src/hotspot/cpu/*/globalDefinitions_*.hpp files, but this value currently
531 # works for all platforms.
532 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -mno-omit-leaf-frame-pointer -mstack-alignment=16"
533
534 if test "x$OPENJDK_TARGET_OS" = xlinux; then
535 TOOLCHAIN_CFLAGS_JDK="-pipe"
536 TOOLCHAIN_CFLAGS_JDK_CONLY="-fno-strict-aliasing" # technically NOT for CXX
537 fi
538 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
539 TOOLCHAIN_FLAGS="-errtags -errfmt"
540 TOOLCHAIN_CFLAGS="-errshort=tags"
541
542 TOOLCHAIN_CFLAGS_JDK="-mt $TOOLCHAIN_FLAGS"
543 TOOLCHAIN_CFLAGS_JDK_CONLY="-xCC -Xa -W0,-noglobal $TOOLCHAIN_CFLAGS" # C only
544 TOOLCHAIN_CFLAGS_JDK_CXXONLY="-features=no%except -norunpath -xnolib" # CXX only
545 TOOLCHAIN_CFLAGS_JVM="-template=no%extdef -features=no%split_init \
546 -library=stlport4 -mt -features=no%except $TOOLCHAIN_FLAGS"
547 if test "x$DEBUG_LEVEL" = xslowdebug; then
548 # Previously -g was used instead of -g0 for slowdebug; this is equivalent
549 # to setting +d.
550 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM +d"
551 fi
552
553 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
554 # Suggested additions: -qsrcmsg to get improved error reporting
555 TOOLCHAIN_CFLAGS_JDK="-qchars=signed -qfullpath -qsaveopt -qstackprotect" # add on both CFLAGS
556 TOOLCHAIN_CFLAGS_JVM="-qtune=balanced \
557 -qalias=noansi -qstrict -qtls=default -qlanglvl=c99vla \
558 -qlanglvl=noredefmac -qnortti -qnoeh -qignerrno -qstackprotect"
559 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
560 TOOLCHAIN_CFLAGS_JVM="-nologo -MD -MP"
561 TOOLCHAIN_CFLAGS_JDK="-nologo -MD -Zc:wchar_t-"
562 fi
563
564 # CFLAGS WARNINGS STUFF
565 # Set JVM_CFLAGS warning handling
566 if test "x$TOOLCHAIN_TYPE" = xgcc; then
567 WARNING_CFLAGS_JDK_CONLY="$WARNINGS_ENABLE_ALL_CFLAGS"
568 WARNING_CFLAGS_JDK_CXXONLY="$WARNINGS_ENABLE_ALL_CXXFLAGS"
569 WARNING_CFLAGS_JVM="$WARNINGS_ENABLE_ALL_CXXFLAGS"
570
571 elif test "x$TOOLCHAIN_TYPE" = xclang; then
572 WARNING_CFLAGS="$WARNINGS_ENABLE_ALL"
573
574 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
575 WARNING_CFLAGS_JDK_CONLY="$WARNINGS_ENABLE_ALL_CFLAGS"
576 WARNING_CFLAGS_JDK_CXXONLY="$WARNINGS_ENABLE_ALL_CXXFLAGS"
577 WARNING_CFLAGS_JVM="$WARNINGS_ENABLE_ALL_CXXFLAGS"
578
579 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
580 WARNING_CFLAGS="$WARNINGS_ENABLE_ALL"
581
582 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
583 WARNING_CFLAGS="" # currently left empty
584 fi
585
586 # Set some additional per-OS defines.
587
588 # Additional macosx handling
589 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
590 OS_CFLAGS="-DMAC_OS_X_VERSION_MIN_REQUIRED=$MACOSX_VERSION_MIN_NODOTS \
591 -mmacosx-version-min=$MACOSX_VERSION_MIN"
592
593 if test -n "$MACOSX_VERSION_MAX"; then
594 OS_CFLAGS="$OS_CFLAGS \
595 -DMAC_OS_X_VERSION_MAX_ALLOWED=$MACOSX_VERSION_MAX_NODOTS"
596 fi
597 fi
598
599 # Where does this really belong??
600 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
601 PICFLAG="-fPIC"
602 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
603 PICFLAG="-KPIC"
604 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
605 # '-qpic' defaults to 'qpic=small'. This means that the compiler generates only
606 # one instruction for accessing the TOC. If the TOC grows larger than 64K, the linker
607 # will have to patch this single instruction with a call to some out-of-order code which
608 # does the load from the TOC. This is of course slower, and we also would have
609 # to use '-bbigtoc' for linking anyway so we could also change the PICFLAG to 'qpic=large'.
610 # With 'qpic=large' the compiler will by default generate a two-instruction sequence which
611 # can be patched directly by the linker and does not require a jump to out-of-order code.
612 #
613 # Since large TOC causes perf. overhead, only pay it where we must. Currently this is
614 # for all libjvm variants (both gtest and normal) but no other binaries. So, build
615 # libjvm with -qpic=large and link with -bbigtoc.
616 JVM_PICFLAG="-qpic=large"
617 JDK_PICFLAG="-qpic"
618 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
619 PICFLAG=""
620 fi
621
622 if test "x$TOOLCHAIN_TYPE" != xxlc; then
623 JVM_PICFLAG="$PICFLAG"
624 JDK_PICFLAG="$PICFLAG"
625 fi
626
627 if test "x$OPENJDK_TARGET_OS" = xmacosx; then
628 # Linking is different on MacOSX
629 JDK_PICFLAG=''
630 if test "x$STATIC_BUILD" = xtrue; then
631 JVM_PICFLAG=""
632 fi
633 fi
634
635 # Optional POSIX functionality needed by the JVM
636 #
637 # Check if clock_gettime is available and in which library. This indicates
638 # availability of CLOCK_MONOTONIC for hotspot. But we don't need to link, so
639 # don't let it update LIBS.
640 save_LIBS="$LIBS"
641 AC_SEARCH_LIBS(clock_gettime, rt, [HAS_CLOCK_GETTIME=true], [])
642 if test "x$LIBS" = "x-lrt "; then
643 CLOCK_GETTIME_IN_LIBRT=true
644 fi
645 LIBS="$save_LIBS"
646
647 if test "x$HAS_CLOCK_GETTIME" = "xtrue"; then
648 OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DSUPPORTS_CLOCK_MONOTONIC"
649 if test "x$CLOCK_GETTIME_IN_LIBRT" = "xtrue"; then
650 OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DNEEDS_LIBRT"
651 fi
652 fi
653 ])
654
655 ################################################################################
656 # $1 - Either BUILD or TARGET to pick the correct OS/CPU variables to check
657 # conditionals against.
658 # $2 - Optional prefix for each variable defined.
659 # $3 - Optional prefix for compiler variables (either BUILD_ or nothing).
660 AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
661 [
662 #### CPU DEFINES, these should (in theory) be independent on toolchain
663
664 # Setup target CPU
665 # Setup endianness
666 if test "x$FLAGS_CPU_ENDIAN" = xlittle; then
667 $1_DEFINES_CPU_JVM="-DVM_LITTLE_ENDIAN"
668 fi
669 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
670 # The macro _LITTLE_ENDIAN needs to be defined the same to avoid the
671 # Sun C compiler warning message: warning: macro redefined: _LITTLE_ENDIAN
672 if test "x$FLAGS_CPU_ENDIAN" = xlittle; then
673 $1_DEFINES_CPU_JDK="-D_LITTLE_ENDIAN="
674 else
675 $1_DEFINES_CPU_JDK="-D_BIG_ENDIAN="
676 fi
677 else
678 if test "x$FLAGS_CPU_ENDIAN" = xlittle; then
679 $1_DEFINES_CPU_JDK="-D_LITTLE_ENDIAN"
680 else
681 $1_DEFINES_CPU_JDK="-D_BIG_ENDIAN"
682 fi
683 fi
684
685 # setup CPU bit size
686 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -DARCH='\"$FLAGS_CPU_LEGACY\"' \
687 -D$FLAGS_CPU_LEGACY"
688
689 if test "x$FLAGS_CPU_BITS" = x64; then
690 # -D_LP64=1 is only set on linux and mac. Setting on windows causes diff in
691 # unpack200.exe.
692 if test "x$FLAGS_OS" = xlinux || test "x$FLAGS_OS" = xmacosx; then
693 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_LP64=1"
694 fi
695 if test "x$FLAGS_OS" != xsolaris && test "x$FLAGS_OS" != xaix; then
696 # Solaris does not have _LP64=1 in the old build.
697 # xlc on AIX defines _LP64=1 by default and issues a warning if we redefine it.
698 $1_DEFINES_CPU_JVM="${$1_DEFINES_CPU_JVM} -D_LP64=1"
699 fi
700 fi
701
702 # toolchain dependend, per-cpu
703 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
704 if test "x$FLAGS_CPU_ARCH" = xx86; then
705 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -DcpuIntel -Di586 -D$FLAGS_CPU_LEGACY_LIB"
706 fi
707 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
708 if test "x$FLAGS_CPU" = xx86_64; then
709 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_AMD64_ -Damd64"
710 else
711 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_X86_ -Dx86"
712 fi
713 fi
714
715 # CFLAGS PER CPU
716 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
717 # COMMON to gcc and clang
718 if test "x$FLAGS_CPU" = xx86; then
719 # Force compatibility with i586 on 32 bit intel platforms.
720 $1_CFLAGS_CPU="-march=i586"
721 fi
722 fi
723
724 if test "x$TOOLCHAIN_TYPE" = xgcc; then
725 if test "x$FLAGS_CPU" = xarm; then
726 # -Wno-psabi to get rid of annoying "note: the mangling of 'va_list' has changed in GCC 4.4"
727 $1_CFLAGS_CPU="-fsigned-char -Wno-psabi $ARM_ARCH_TYPE_FLAGS $ARM_FLOAT_TYPE_FLAGS -DJDK_ARCH_ABI_PROP_NAME='\"\$(JDK_ARCH_ABI_PROP_NAME)\"'"
728 $1_CFLAGS_CPU_JVM="-DARM"
729 elif test "x$FLAGS_CPU_ARCH" = xppc; then
730 $1_CFLAGS_CPU_JVM="-minsert-sched-nops=regroup_exact -mno-multiple -mno-string"
731 if test "x$FLAGS_CPU" = xppc64; then
732 # -mminimal-toc fixes `relocation truncated to fit' error for gcc 4.1.
733 # Use ppc64 instructions, but schedule for power5
734 $1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -mminimal-toc -mcpu=powerpc64 -mtune=power5"
735 elif test "x$FLAGS_CPU" = xppc64le; then
736 # Little endian machine uses ELFv2 ABI.
737 # Use Power8, this is the first CPU to support PPC64 LE with ELFv2 ABI.
738 $1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -DABI_ELFv2 -mcpu=power8 -mtune=power8"
739 fi
740 elif test "x$FLAGS_CPU" = xs390x; then
741 $1_CFLAGS_CPU="-mbackchain -march=z10"
742 fi
743
744 if test "x$FLAGS_CPU_ARCH" != xarm && test "x$FLAGS_CPU_ARCH" != xppc; then
745 # for all archs except arm and ppc, prevent gcc to omit frame pointer
746 $1_CFLAGS_CPU_JDK="${$1_CFLAGS_CPU_JDK} -fno-omit-frame-pointer"
747 fi
748
749 $1_CXXSTD_CXXFLAG="-std=gnu++98"
750 FLAGS_CXX_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${$1_CXXSTD_CXXFLAG} -Werror],
751 PREFIX: $3, IF_FALSE: [$1_CXXSTD_CXXFLAG=""])
752 $1_TOOLCHAIN_CFLAGS_JDK_CXXONLY="${$1_CXXSTD_CXXFLAG}"
753 $1_TOOLCHAIN_CFLAGS_JVM="${$1_TOOLCHAIN_CFLAGS_JVM} ${$1_CXXSTD_CXXFLAG}"
754 $2ADLC_CXXFLAG="${$1_CXXSTD_CXXFLAG}"
755
756 elif test "x$TOOLCHAIN_TYPE" = xclang; then
757 if test "x$FLAGS_OS" = xlinux; then
758 # ppc test not really needed for clang
759 if test "x$FLAGS_CPU_ARCH" != xarm && test "x$FLAGS_CPU_ARCH" != xppc; then
760 # for all archs except arm and ppc, prevent gcc to omit frame pointer
761 $1_CFLAGS_CPU_JDK="${$1_CFLAGS_CPU_JDK} -fno-omit-frame-pointer"
762 fi
763 fi
764
765 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
766 if test "x$FLAGS_CPU" = xx86_64; then
767 # NOTE: -xregs=no%frameptr is supposed to be default on x64
768 $1_CFLAGS_CPU_JDK="-xregs=no%frameptr"
769 elif test "x$FLAGS_CPU" = xsparcv9; then
770 $1_CFLAGS_CPU_JVM="-xarch=sparc"
771 $1_CFLAGS_CPU_JDK_LIBONLY="-xregs=no%appl"
772 fi
773
774 elif test "x$TOOLCHAIN_TYPE" = xxlc; then
775 if test "x$FLAGS_CPU" = xppc64; then
776 $1_CFLAGS_CPU_JVM="-qarch=ppc64"
777 fi
778
779 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
780 if test "x$FLAGS_CPU" = xx86; then
781 $1_CFLAGS_CPU_JVM="-arch:IA32"
782 elif test "x$OPENJDK_TARGET_CPU" = xx86_64; then
783 if test "x$DEBUG_LEVEL" != xrelease; then
784 # NOTE: This is probably redundant; -homeparams is default on
785 # non-release builds.
786 $1_CFLAGS_CPU_JVM="-homeparams"
787 fi
788 fi
789 fi
790
791 if test "x$TOOLCHAIN_TYPE" = xgcc; then
792 FLAGS_SETUP_GCC6_COMPILER_FLAGS($1, $3)
793 $1_TOOLCHAIN_CFLAGS="${$1_GCC6_CFLAGS}"
794
795 $1_WARNING_CFLAGS_JVM="-Wno-format-zero-length -Wtype-limits -Wuninitialized"
796 fi
797
798 # EXPORT to API
799 CFLAGS_JVM_COMMON="$ALWAYS_CFLAGS_JVM $ALWAYS_DEFINES_JVM \
800 $TOOLCHAIN_CFLAGS_JVM ${$1_TOOLCHAIN_CFLAGS_JVM} \
801 $OS_CFLAGS $OS_CFLAGS_JVM $CFLAGS_OS_DEF_JVM $DEBUG_CFLAGS_JVM \
802 $WARNING_CFLAGS $WARNING_CFLAGS_JVM $JVM_PICFLAG"
803
804 CFLAGS_JDK_COMMON="$ALWAYS_CFLAGS_JDK $ALWAYS_DEFINES_JDK $TOOLCHAIN_CFLAGS_JDK \
805 $OS_CFLAGS $CFLAGS_OS_DEF_JDK $DEBUG_CFLAGS_JDK $DEBUG_OPTIONS_FLAGS_JDK \
806 $WARNING_CFLAGS $WARNING_CFLAGS_JDK $DEBUG_SYMBOLS_CFLAGS_JDK"
807
808 # Use ${$2EXTRA_CFLAGS} to block EXTRA_CFLAGS to be added to build flags.
809 # (Currently we don't have any OPENJDK_BUILD_EXTRA_CFLAGS, but that might
810 # change in the future.)
811
812 CFLAGS_JDK_COMMON_CONLY="$TOOLCHAIN_CFLAGS_JDK_CONLY \
813 $WARNING_CFLAGS_JDK_CONLY ${$2EXTRA_CFLAGS}"
814 CFLAGS_JDK_COMMON_CXXONLY="$ALWAYS_DEFINES_JDK_CXXONLY \
815 $TOOLCHAIN_CFLAGS_JDK_CXXONLY \
816 ${$1_TOOLCHAIN_CFLAGS_JDK_CXXONLY} \
817 $WARNING_CFLAGS_JDK_CXXONLY ${$2EXTRA_CXXFLAGS}"
818
819 $1_CFLAGS_JVM="${$1_DEFINES_CPU_JVM} ${$1_CFLAGS_CPU} ${$1_CFLAGS_CPU_JVM} ${$1_TOOLCHAIN_CFLAGS} ${$1_WARNING_CFLAGS_JVM}"
820 $1_CFLAGS_JDK="${$1_DEFINES_CPU_JDK} ${$1_CFLAGS_CPU} ${$1_CFLAGS_CPU_JDK} ${$1_TOOLCHAIN_CFLAGS}"
821
822 $2JVM_CFLAGS="$CFLAGS_JVM_COMMON ${$1_CFLAGS_JVM} ${$2EXTRA_CXXFLAGS}"
823
824 $2CFLAGS_JDKEXE="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CONLY ${$1_CFLAGS_JDK}"
825 $2CXXFLAGS_JDKEXE="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CXXONLY ${$1_CFLAGS_JDK}"
826 $2CFLAGS_JDKLIB="${$2CFLAGS_JDKEXE} $JDK_PICFLAG ${$1_CFLAGS_CPU_JDK_LIBONLY}"
827 $2CXXFLAGS_JDKLIB="${$2CXXFLAGS_JDKEXE} $JDK_PICFLAG ${$1_CFLAGS_CPU_JDK_LIBONLY}"
828
829 AC_SUBST($2JVM_CFLAGS)
830 AC_SUBST($2CFLAGS_JDKLIB)
831 AC_SUBST($2CFLAGS_JDKEXE)
832 AC_SUBST($2CXXFLAGS_JDKLIB)
833 AC_SUBST($2CXXFLAGS_JDKEXE)
834 AC_SUBST($2ADLC_CXXFLAG)
835
836 COMPILER_FP_CONTRACT_OFF_FLAG="-ffp-contract=off"
837 # Check that the compiler supports -ffp-contract=off flag
838 # Set FDLIBM_CFLAGS to -ffp-contract=off if it does. Empty
839 # otherwise.
840 # These flags are required for GCC-based builds of
841 # fdlibm with optimization without losing precision.
842 # Notably, -ffp-contract=off needs to be added for GCC >= 4.6.
843 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
844 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${COMPILER_FP_CONTRACT_OFF_FLAG}],
845 PREFIX: $3,
846 IF_TRUE: [$2FDLIBM_CFLAGS=${COMPILER_FP_CONTRACT_OFF_FLAG}],
847 IF_FALSE: [$2FDLIBM_CFLAGS=""])
848 fi
849 AC_SUBST($2FDLIBM_CFLAGS)
850 ])
851
852 # FLAGS_SETUP_GCC6_COMPILER_FLAGS([PREFIX])
853 # Arguments:
854 # $1 - Prefix for each variable defined.
855 # $2 - Prefix for compiler variables (either BUILD_ or nothing).
856 AC_DEFUN([FLAGS_SETUP_GCC6_COMPILER_FLAGS],
857 [
858 # These flags are required for GCC 6 builds as undefined behaviour in OpenJDK code
859 # runs afoul of the more aggressive versions of these optimisations.
860 # Notably, value range propagation now assumes that the this pointer of C++
861 # member functions is non-null.
862 NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks"
863 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_DELETE_NULL_POINTER_CHECKS_CFLAG -Werror],
864 PREFIX: $2, IF_FALSE: [NO_DELETE_NULL_POINTER_CHECKS_CFLAG=""])
865 NO_LIFETIME_DSE_CFLAG="-fno-lifetime-dse"
866 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_LIFETIME_DSE_CFLAG -Werror],
867 PREFIX: $2, IF_FALSE: [NO_LIFETIME_DSE_CFLAG=""])
868 $1_GCC6_CFLAGS="${NO_DELETE_NULL_POINTER_CHECKS_CFLAG} ${NO_LIFETIME_DSE_CFLAG}"
869 ])
870
871 # Documentation on common flags used for solstudio in HIGHEST.
872 #
873 # WARNING: Use of OPTIMIZATION_LEVEL=HIGHEST in your Makefile needs to be
874 # done with care, there are some assumptions below that need to
875 # be understood about the use of pointers, and IEEE behavior.
876 #
877 # -fns: Use non-standard floating point mode (not IEEE 754)
878 # -fsimple: Do some simplification of floating point arithmetic (not IEEE 754)
879 # -fsingle: Use single precision floating point with 'float'
880 # -xalias_level=basic: Assume memory references via basic pointer types do not alias
881 # (Source with excessing pointer casting and data access with mixed
882 # pointer types are not recommended)
883 # -xbuiltin=%all: Use intrinsic or inline versions for math/std functions
884 # (If you expect perfect errno behavior, do not use this)
885 # -xdepend: Loop data dependency optimizations (need -xO3 or higher)
886 # -xrestrict: Pointer parameters to functions do not overlap
887 # (Similar to -xalias_level=basic usage, but less obvious sometimes.
888 # If you pass in multiple pointers to the same data, do not use this)
889 # -xlibmil: Inline some library routines
890 # (If you expect perfect errno behavior, do not use this)
891 # -xlibmopt: Use optimized math routines (CURRENTLY DISABLED)
892 # (If you expect perfect errno behavior, do not use this)
893 # Can cause undefined external on Solaris 8 X86 on __sincos, removing for now