1 # 2 # Copyright (c) 2011, 2020, 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$TOOLCHAIN_TYPE" = xgcc; then 38 # Default works for linux, might work on other platforms as well. 39 SHARED_LIBRARY_FLAGS='-shared' 40 SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1' 41 SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN" 42 SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1' 43 SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1' 44 45 elif test "x$TOOLCHAIN_TYPE" = xclang; then 46 if test "x$OPENJDK_TARGET_OS" = xmacosx; then 47 # Linking is different on MacOSX 48 SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0" 49 SET_EXECUTABLE_ORIGIN='-Wl,-rpath,@loader_path$(or [$]1,/.)' 50 SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN" 51 SET_SHARED_LIBRARY_NAME='-Wl,-install_name,@rpath/[$]1' 52 SET_SHARED_LIBRARY_MAPFILE='-Wl,-exported_symbols_list,[$]1' 53 54 else 55 # Default works for linux, might work on other platforms as well. 56 SHARED_LIBRARY_FLAGS='-shared' 57 SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1' 58 SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1' 59 SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1' 60 61 # arm specific settings 62 if test "x$OPENJDK_TARGET_CPU" = "xarm"; then 63 # '-Wl,-z,origin' isn't used on arm. 64 SET_SHARED_LIBRARY_ORIGIN='-Wl,-rpath,\$$$$ORIGIN[$]1' 65 else 66 SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN" 67 fi 68 fi 69 70 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 71 SHARED_LIBRARY_FLAGS="-qmkshrobj -bM:SRE -bnoentry" 72 SET_EXECUTABLE_ORIGIN="" 73 SET_SHARED_LIBRARY_ORIGIN='' 74 SET_SHARED_LIBRARY_NAME='' 75 SET_SHARED_LIBRARY_MAPFILE='' 76 77 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 78 SHARED_LIBRARY_FLAGS="-dll" 79 SET_EXECUTABLE_ORIGIN='' 80 SET_SHARED_LIBRARY_ORIGIN='' 81 SET_SHARED_LIBRARY_NAME='' 82 SET_SHARED_LIBRARY_MAPFILE='-def:[$]1' 83 fi 84 85 AC_SUBST(SET_EXECUTABLE_ORIGIN) 86 AC_SUBST(SET_SHARED_LIBRARY_ORIGIN) 87 AC_SUBST(SET_SHARED_LIBRARY_NAME) 88 AC_SUBST(SET_SHARED_LIBRARY_MAPFILE) 89 AC_SUBST(SHARED_LIBRARY_FLAGS) 90 ]) 91 92 AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS], 93 [ 94 # By default don't set any specific assembler debug 95 # info flags for toolchains unless we know they work. 96 # See JDK-8207057. 97 ASFLAGS_DEBUG_SYMBOLS="" 98 # Debug symbols 99 if test "x$TOOLCHAIN_TYPE" = xgcc; then 100 CFLAGS_DEBUG_SYMBOLS="-g" 101 ASFLAGS_DEBUG_SYMBOLS="-g" 102 elif test "x$TOOLCHAIN_TYPE" = xclang; then 103 CFLAGS_DEBUG_SYMBOLS="-g" 104 ASFLAGS_DEBUG_SYMBOLS="-g" 105 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 106 CFLAGS_DEBUG_SYMBOLS="-g1" 107 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 108 CFLAGS_DEBUG_SYMBOLS="-Z7" 109 fi 110 111 AC_SUBST(CFLAGS_DEBUG_SYMBOLS) 112 AC_SUBST(ASFLAGS_DEBUG_SYMBOLS) 113 ]) 114 115 AC_DEFUN([FLAGS_SETUP_WARNINGS], 116 [ 117 # Set default value. 118 if test "x$TOOLCHAIN_TYPE" != xxlc; then 119 WARNINGS_AS_ERRORS_DEFAULT=true 120 else 121 WARNINGS_AS_ERRORS_DEFAULT=false 122 fi 123 124 UTIL_ARG_ENABLE(NAME: warnings-as-errors, DEFAULT: $WARNINGS_AS_ERRORS_DEFAULT, 125 RESULT: WARNINGS_AS_ERRORS, 126 DEFAULT_DESC: [auto], 127 DESC: [consider native warnings to be an error]) 128 AC_SUBST(WARNINGS_AS_ERRORS) 129 130 case "${TOOLCHAIN_TYPE}" in 131 microsoft) 132 DISABLE_WARNING_PREFIX="-wd" 133 CFLAGS_WARNINGS_ARE_ERRORS="-WX" 134 135 WARNINGS_ENABLE_ALL="-W3" 136 DISABLED_WARNINGS="4800" 137 ;; 138 139 gcc) 140 DISABLE_WARNING_PREFIX="-Wno-" 141 CFLAGS_WARNINGS_ARE_ERRORS="-Werror" 142 143 # Additional warnings that are not activated by -Wall and -Wextra 144 WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wsign-compare \ 145 -Wunused-function -Wundef -Wunused-value -Wreturn-type \ 146 -Wtrampolines" 147 WARNINGS_ENABLE_ADDITIONAL_CXX="-Woverloaded-virtual -Wreorder" 148 WARNINGS_ENABLE_ALL_CFLAGS="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL" 149 WARNINGS_ENABLE_ALL_CXXFLAGS="$WARNINGS_ENABLE_ALL_CFLAGS $WARNINGS_ENABLE_ADDITIONAL_CXX" 150 151 DISABLED_WARNINGS="unused-parameter unused" 152 BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-" 153 ;; 154 155 clang) 156 DISABLE_WARNING_PREFIX="-Wno-" 157 CFLAGS_WARNINGS_ARE_ERRORS="-Werror" 158 159 # Additional warnings that are not activated by -Wall and -Wextra 160 WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wsign-compare -Wreorder \ 161 -Wunused-function -Wundef -Wunused-value -Woverloaded-virtual" 162 WARNINGS_ENABLE_ALL="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL" 163 164 DISABLED_WARNINGS="unknown-warning-option unused-parameter unused" 165 166 if test "x$OPENJDK_TARGET_OS" = xmacosx; then 167 # missing-method-return-type triggers in JavaNativeFoundation framework 168 DISABLED_WARNINGS="$DISABLED_WARNINGS missing-method-return-type" 169 fi 170 171 ;; 172 173 xlc) 174 DISABLE_WARNING_PREFIX="-Wno-" 175 CFLAGS_WARNINGS_ARE_ERRORS="-qhalt=w" 176 177 # Possibly a better subset than "all" is "lan:trx:ret:zea:cmp:ret" 178 WARNINGS_ENABLE_ALL="-qinfo=all -qformat=all" 179 DISABLED_WARNINGS="" 180 ;; 181 esac 182 AC_SUBST(DISABLE_WARNING_PREFIX) 183 AC_SUBST(BUILD_CC_DISABLE_WARNING_PREFIX) 184 AC_SUBST(CFLAGS_WARNINGS_ARE_ERRORS) 185 AC_SUBST(DISABLED_WARNINGS) 186 AC_SUBST(DISABLED_WARNINGS_C) 187 AC_SUBST(DISABLED_WARNINGS_CXX) 188 ]) 189 190 AC_DEFUN([FLAGS_SETUP_QUALITY_CHECKS], 191 [ 192 # bounds, memory and behavior checking options 193 if test "x$TOOLCHAIN_TYPE" = xgcc; then 194 case $DEBUG_LEVEL in 195 release ) 196 # no adjustment 197 ;; 198 fastdebug ) 199 # no adjustment 200 ;; 201 slowdebug ) 202 # FIXME: By adding this to C(XX)FLAGS_DEBUG_OPTIONS/JVM_CFLAGS_SYMBOLS it 203 # get's added conditionally on whether we produce debug symbols or not. 204 # This is most likely not really correct. 205 206 # Add runtime stack smashing and undefined behavior checks. 207 CFLAGS_DEBUG_OPTIONS="-fstack-protector-all --param ssp-buffer-size=1" 208 CXXFLAGS_DEBUG_OPTIONS="-fstack-protector-all --param ssp-buffer-size=1" 209 210 JVM_CFLAGS_SYMBOLS="$JVM_CFLAGS_SYMBOLS -fstack-protector-all --param ssp-buffer-size=1" 211 ;; 212 esac 213 fi 214 ]) 215 216 AC_DEFUN([FLAGS_SETUP_OPTIMIZATION], 217 [ 218 if test "x$TOOLCHAIN_TYPE" = xgcc; then 219 C_O_FLAG_HIGHEST_JVM="-O3" 220 C_O_FLAG_HIGHEST="-O3" 221 C_O_FLAG_HI="-O3" 222 C_O_FLAG_NORM="-O2" 223 C_O_FLAG_SIZE="-Os" 224 C_O_FLAG_DEBUG="-O0" 225 C_O_FLAG_DEBUG_JVM="-O0" 226 C_O_FLAG_NONE="-O0" 227 # -D_FORTIFY_SOURCE=2 hardening option needs optimization (at least -O1) enabled 228 # set for lower O-levels -U_FORTIFY_SOURCE to overwrite previous settings 229 if test "x$OPENJDK_TARGET_OS" = xlinux -a "x$DEBUG_LEVEL" = "xfastdebug"; then 230 ENABLE_FORTIFY_CFLAGS="-D_FORTIFY_SOURCE=2" 231 DISABLE_FORTIFY_CFLAGS="-U_FORTIFY_SOURCE" 232 C_O_FLAG_HIGHEST_JVM="${C_O_FLAG_HIGHEST_JVM} ${ENABLE_FORTIFY_CFLAGS}" 233 C_O_FLAG_HIGHEST="${C_O_FLAG_HIGHEST} ${ENABLE_FORTIFY_CFLAGS}" 234 C_O_FLAG_HI="${C_O_FLAG_HI} ${ENABLE_FORTIFY_CFLAGS}" 235 C_O_FLAG_NORM="${C_O_FLAG_NORM} ${ENABLE_FORTIFY_CFLAGS}" 236 C_O_FLAG_SIZE="${C_O_FLAG_SIZE} ${DISABLE_FORTIFY_CFLAGS}" 237 C_O_FLAG_DEBUG="${C_O_FLAG_DEBUG} ${DISABLE_FORTIFY_CFLAGS}" 238 C_O_FLAG_DEBUG_JVM="${C_O_FLAG_DEBUG_JVM} ${DISABLE_FORTIFY_CFLAGS}" 239 C_O_FLAG_NONE="${C_O_FLAG_NONE} ${DISABLE_FORTIFY_CFLAGS}" 240 fi 241 elif test "x$TOOLCHAIN_TYPE" = xclang; then 242 C_O_FLAG_HIGHEST_JVM="-O3" 243 C_O_FLAG_HIGHEST="-O3" 244 C_O_FLAG_HI="-O3" 245 C_O_FLAG_NORM="-O2" 246 C_O_FLAG_DEBUG_JVM="-O0" 247 C_O_FLAG_SIZE="-Os" 248 C_O_FLAG_DEBUG="-O0" 249 C_O_FLAG_NONE="-O0" 250 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 251 C_O_FLAG_HIGHEST_JVM="-O3 -qhot=level=1 -qinline -qinlglue" 252 C_O_FLAG_HIGHEST="-O3 -qhot=level=1 -qinline -qinlglue" 253 C_O_FLAG_HI="-O3 -qinline -qinlglue" 254 C_O_FLAG_NORM="-O2" 255 C_O_FLAG_DEBUG="-qnoopt" 256 # FIXME: Value below not verified. 257 C_O_FLAG_DEBUG_JVM="" 258 C_O_FLAG_NONE="-qnoopt" 259 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 260 C_O_FLAG_HIGHEST_JVM="-O2 -Oy-" 261 C_O_FLAG_HIGHEST="-O2" 262 C_O_FLAG_HI="-O1" 263 C_O_FLAG_NORM="-O1" 264 C_O_FLAG_DEBUG="-Od" 265 C_O_FLAG_DEBUG_JVM="" 266 C_O_FLAG_NONE="-Od" 267 C_O_FLAG_SIZE="-Os" 268 fi 269 270 # Now copy to C++ flags 271 CXX_O_FLAG_HIGHEST_JVM="$C_O_FLAG_HIGHEST_JVM" 272 CXX_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST" 273 CXX_O_FLAG_HI="$C_O_FLAG_HI" 274 CXX_O_FLAG_NORM="$C_O_FLAG_NORM" 275 CXX_O_FLAG_DEBUG="$C_O_FLAG_DEBUG" 276 CXX_O_FLAG_DEBUG_JVM="$C_O_FLAG_DEBUG_JVM" 277 CXX_O_FLAG_NONE="$C_O_FLAG_NONE" 278 CXX_O_FLAG_SIZE="$C_O_FLAG_SIZE" 279 280 # Adjust optimization flags according to debug level. 281 case $DEBUG_LEVEL in 282 release ) 283 # no adjustment 284 ;; 285 fastdebug ) 286 # Not quite so much optimization 287 C_O_FLAG_HI="$C_O_FLAG_NORM" 288 CXX_O_FLAG_HI="$CXX_O_FLAG_NORM" 289 ;; 290 slowdebug ) 291 # Disable optimization 292 C_O_FLAG_HIGHEST_JVM="$C_O_FLAG_DEBUG_JVM" 293 C_O_FLAG_HIGHEST="$C_O_FLAG_DEBUG" 294 C_O_FLAG_HI="$C_O_FLAG_DEBUG" 295 C_O_FLAG_NORM="$C_O_FLAG_DEBUG" 296 C_O_FLAG_SIZE="$C_O_FLAG_DEBUG" 297 CXX_O_FLAG_HIGHEST_JVM="$CXX_O_FLAG_DEBUG_JVM" 298 CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_DEBUG" 299 CXX_O_FLAG_HI="$CXX_O_FLAG_DEBUG" 300 CXX_O_FLAG_NORM="$CXX_O_FLAG_DEBUG" 301 CXX_O_FLAG_SIZE="$CXX_O_FLAG_DEBUG" 302 ;; 303 esac 304 305 AC_SUBST(C_O_FLAG_HIGHEST_JVM) 306 AC_SUBST(C_O_FLAG_HIGHEST) 307 AC_SUBST(C_O_FLAG_HI) 308 AC_SUBST(C_O_FLAG_NORM) 309 AC_SUBST(C_O_FLAG_NONE) 310 AC_SUBST(C_O_FLAG_SIZE) 311 AC_SUBST(CXX_O_FLAG_HIGHEST_JVM) 312 AC_SUBST(CXX_O_FLAG_HIGHEST) 313 AC_SUBST(CXX_O_FLAG_HI) 314 AC_SUBST(CXX_O_FLAG_NORM) 315 AC_SUBST(CXX_O_FLAG_NONE) 316 AC_SUBST(CXX_O_FLAG_SIZE) 317 ]) 318 319 AC_DEFUN([FLAGS_SETUP_CFLAGS], 320 [ 321 ### CFLAGS 322 323 FLAGS_SETUP_CFLAGS_HELPER 324 325 FLAGS_OS=$OPENJDK_TARGET_OS 326 FLAGS_OS_TYPE=$OPENJDK_TARGET_OS_TYPE 327 FLAGS_CPU=$OPENJDK_TARGET_CPU 328 FLAGS_CPU_ARCH=$OPENJDK_TARGET_CPU_ARCH 329 FLAGS_CPU_BITS=$OPENJDK_TARGET_CPU_BITS 330 FLAGS_CPU_ENDIAN=$OPENJDK_TARGET_CPU_ENDIAN 331 FLAGS_CPU_LEGACY=$OPENJDK_TARGET_CPU_LEGACY 332 FLAGS_CPU_LEGACY_LIB=$OPENJDK_TARGET_CPU_LEGACY_LIB 333 334 FLAGS_SETUP_CFLAGS_CPU_DEP([TARGET]) 335 336 # Repeat the check for the BUILD_CC and BUILD_CXX. Need to also reset CFLAGS 337 # since any target specific flags will likely not work with the build compiler. 338 CC_OLD="$CC" 339 CXX_OLD="$CXX" 340 CFLAGS_OLD="$CFLAGS" 341 CXXFLAGS_OLD="$CXXFLAGS" 342 CC="$BUILD_CC" 343 CXX="$BUILD_CXX" 344 CFLAGS="" 345 CXXFLAGS="" 346 347 FLAGS_OS=$OPENJDK_BUILD_OS 348 FLAGS_OS_TYPE=$OPENJDK_BUILD_OS_TYPE 349 FLAGS_CPU=$OPENJDK_BUILD_CPU 350 FLAGS_CPU_ARCH=$OPENJDK_BUILD_CPU_ARCH 351 FLAGS_CPU_BITS=$OPENJDK_BUILD_CPU_BITS 352 FLAGS_CPU_ENDIAN=$OPENJDK_BUILD_CPU_ENDIAN 353 FLAGS_CPU_LEGACY=$OPENJDK_BUILD_CPU_LEGACY 354 FLAGS_CPU_LEGACY_LIB=$OPENJDK_BUILD_CPU_LEGACY_LIB 355 356 FLAGS_SETUP_CFLAGS_CPU_DEP([BUILD], [OPENJDK_BUILD_], [BUILD_]) 357 358 CC="$CC_OLD" 359 CXX="$CXX_OLD" 360 CFLAGS="$CFLAGS_OLD" 361 CXXFLAGS="$CXXFLAGS_OLD" 362 ]) 363 364 ################################################################################ 365 # platform independent 366 AC_DEFUN([FLAGS_SETUP_CFLAGS_HELPER], 367 [ 368 #### OS DEFINES, these should be independent on toolchain 369 if test "x$OPENJDK_TARGET_OS" = xlinux; then 370 CFLAGS_OS_DEF_JVM="-DLINUX" 371 CFLAGS_OS_DEF_JDK="-D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE" 372 elif test "x$OPENJDK_TARGET_OS" = xmacosx; then 373 CFLAGS_OS_DEF_JVM="-D_ALLBSD_SOURCE -D_DARWIN_C_SOURCE -D_XOPEN_SOURCE" 374 CFLAGS_OS_DEF_JDK="-D_ALLBSD_SOURCE -D_DARWIN_UNLIMITED_SELECT" 375 elif test "x$OPENJDK_TARGET_OS" = xaix; then 376 CFLAGS_OS_DEF_JVM="-DAIX" 377 elif test "x$OPENJDK_TARGET_OS" = xbsd; then 378 CFLAGS_OS_DEF_JDK="-D_ALLBSD_SOURCE" 379 elif test "x$OPENJDK_TARGET_OS" = xwindows; then 380 CFLAGS_OS_DEF_JVM="-D_WINDOWS -DWIN32 -D_JNI_IMPLEMENTATION_" 381 fi 382 383 CFLAGS_OS_DEF_JDK="$CFLAGS_OS_DEF_JDK -D$OPENJDK_TARGET_OS_UPPERCASE" 384 385 #### GLOBAL DEFINES 386 # Set some common defines. These works for all compilers, but assume 387 # -D is universally accepted. 388 389 # Always enable optional macros for VM. 390 ALWAYS_CFLAGS_JVM="-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS" 391 392 # Setup some hard coded includes 393 ALWAYS_CFLAGS_JDK=" \ 394 -I\$(SUPPORT_OUTPUTDIR)/modules_include/java.base \ 395 -I\$(SUPPORT_OUTPUTDIR)/modules_include/java.base/\$(OPENJDK_TARGET_OS_INCLUDE_SUBDIR) \ 396 -I${TOPDIR}/src/java.base/share/native/libjava \ 397 -I${TOPDIR}/src/java.base/$OPENJDK_TARGET_OS_TYPE/native/libjava \ 398 -I${TOPDIR}/src/hotspot/share/include \ 399 -I${TOPDIR}/src/hotspot/os/${HOTSPOT_TARGET_OS_TYPE}/include" 400 401 ############################################################################### 402 403 # Adjust flags according to debug level. 404 # Setup debug/release defines 405 if test "x$DEBUG_LEVEL" = xrelease; then 406 DEBUG_CFLAGS_JDK="-DNDEBUG" 407 else 408 DEBUG_CFLAGS_JDK="-DDEBUG" 409 410 if test "x$TOOLCHAIN_TYPE" = xxlc; then 411 # We need '-qminimaltoc' or '-qpic=large -bbigtoc' if the TOC overflows. 412 # Hotspot now overflows its 64K TOC (currently only for debug), 413 # so for debug we build with '-qpic=large -bbigtoc'. 414 DEBUG_CFLAGS_JVM="-qpic=large" 415 fi 416 fi 417 418 if test "x$DEBUG_LEVEL" != xrelease; then 419 DEBUG_OPTIONS_FLAGS_JDK="$CFLAGS_DEBUG_OPTIONS" 420 DEBUG_SYMBOLS_CFLAGS_JDK="$CFLAGS_DEBUG_SYMBOLS" 421 fi 422 423 #### TOOLCHAIN DEFINES 424 425 if test "x$TOOLCHAIN_TYPE" = xgcc; then 426 ALWAYS_DEFINES_JVM="-D_GNU_SOURCE -D_REENTRANT" 427 elif test "x$TOOLCHAIN_TYPE" = xclang; then 428 ALWAYS_DEFINES_JVM="-D_GNU_SOURCE" 429 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 430 ALWAYS_DEFINES_JVM="-D_REENTRANT" 431 ALWAYS_DEFINES_JDK="-D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC" 432 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 433 ALWAYS_DEFINES_JDK="-DWIN32_LEAN_AND_MEAN -D_CRT_SECURE_NO_DEPRECATE \ 434 -D_CRT_NONSTDC_NO_DEPRECATE -DWIN32 -DIAL" 435 ALWAYS_DEFINES_JVM="-DNOMINMAX -DWIN32_LEAN_AND_MEAN" 436 fi 437 438 ############################################################################### 439 # 440 # 441 # CFLAGS BASIC 442 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 443 # COMMON to gcc and clang 444 TOOLCHAIN_CFLAGS_JVM="-pipe -fno-rtti -fno-exceptions \ 445 -fvisibility=hidden -fno-strict-aliasing -fno-omit-frame-pointer" 446 fi 447 448 if test "x$TOOLCHAIN_TYPE" = xgcc; then 449 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -fcheck-new -fstack-protector" 450 TOOLCHAIN_CFLAGS_JDK="-pipe -fstack-protector" 451 # reduce lib size on linux in link step, this needs also special compile flags 452 # do this on s390x also for libjvm (where serviceability agent is not supported) 453 if test "x$ENABLE_LINKTIME_GC" = xtrue; then 454 TOOLCHAIN_CFLAGS_JDK="$TOOLCHAIN_CFLAGS_JDK -ffunction-sections -fdata-sections" 455 if test "x$OPENJDK_TARGET_CPU" = xs390x; then 456 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -ffunction-sections -fdata-sections" 457 fi 458 fi 459 # technically NOT for CXX (but since this gives *worse* performance, use 460 # no-strict-aliasing everywhere!) 461 TOOLCHAIN_CFLAGS_JDK_CONLY="-fno-strict-aliasing" 462 463 elif test "x$TOOLCHAIN_TYPE" = xclang; then 464 # Restrict the debug information created by Clang to avoid 465 # too big object files and speed the build up a little bit 466 # (see http://llvm.org/bugs/show_bug.cgi?id=7554) 467 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -flimit-debug-info" 468 469 # In principle the stack alignment below is cpu- and ABI-dependent and 470 # should agree with values of StackAlignmentInBytes in various 471 # src/hotspot/cpu/*/globalDefinitions_*.hpp files, but this value currently 472 # works for all platforms. 473 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -mno-omit-leaf-frame-pointer -mstack-alignment=16" 474 475 if test "x$OPENJDK_TARGET_OS" = xlinux; then 476 if test "x$DEBUG_LEVEL" = xrelease; then 477 # Clang does not inline as much as GCC does for functions with "inline" keyword by default. 478 # This causes noticeable slowdown in pause time for G1, and possibly in other areas. 479 # Increasing the inline hint threshold avoids the slowdown for Clang-built JVM. 480 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -mllvm -inlinehint-threshold=100000" 481 fi 482 TOOLCHAIN_CFLAGS_JDK="-pipe" 483 TOOLCHAIN_CFLAGS_JDK_CONLY="-fno-strict-aliasing" # technically NOT for CXX 484 fi 485 486 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 487 # Suggested additions: -qsrcmsg to get improved error reporting 488 # set -qtbtable=full for a better traceback table/better stacks in hs_err when xlc16 is used 489 TOOLCHAIN_CFLAGS_JDK="-qtbtable=full -qchars=signed -qfullpath -qsaveopt -qstackprotect" # add on both CFLAGS 490 TOOLCHAIN_CFLAGS_JVM="-qtbtable=full -qtune=balanced \ 491 -qalias=noansi -qstrict -qtls=default -qnortti -qnoeh -qignerrno -qstackprotect" 492 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 493 TOOLCHAIN_CFLAGS_JVM="-nologo -MD -MP" 494 TOOLCHAIN_CFLAGS_JDK="-nologo -MD -Zc:wchar_t-" 495 fi 496 497 # CFLAGS C language level for JDK sources (hotspot only uses C++) 498 # Ideally we would have a common level across all toolchains so that all sources 499 # are sure to conform to the same standard. Unfortunately neither our sources nor 500 # our toolchains are in a condition to support that. But what we loosely aim for is 501 # C99 level. 502 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang || test "x$TOOLCHAIN_TYPE" = xxlc; then 503 # Explicitly set C99. clang and xlclang support the same flag. 504 LANGSTD_CFLAGS="-std=c99" 505 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 506 # MSVC doesn't support C99/C11 explicitly, unless you compile as C++: 507 # LANGSTD_CFLAGS="-TP" 508 # but that requires numerous changes to the sources files. So we are limited 509 # to C89/C90 plus whatever extensions Visual Studio has decided to implement. 510 # This is the lowest bar for shared code. 511 LANGSTD_CFLAGS="" 512 fi 513 TOOLCHAIN_CFLAGS_JDK_CONLY="$LANGSTD_CFLAGS $TOOLCHAIN_CFLAGS_JDK_CONLY" 514 515 # CXXFLAGS C++ language level for all of JDK, including Hotspot. 516 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang || test "x$TOOLCHAIN_TYPE" = xxlc; then 517 LANGSTD_CXXFLAGS="-std=c++14" 518 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 519 LANGSTD_CXXFLAGS="-std:c++14" 520 else 521 AC_MSG_ERROR([Don't know how to enable C++14 for this toolchain]) 522 fi 523 TOOLCHAIN_CFLAGS_JDK_CXXONLY="$TOOLCHAIN_CFLAGS_JDK_CXXONLY $LANGSTD_CXXFLAGS" 524 TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM $LANGSTD_CXXFLAGS" 525 ADLC_LANGSTD_CXXFLAGS="$LANGSTD_CXXFLAGS" 526 527 # CFLAGS WARNINGS STUFF 528 # Set JVM_CFLAGS warning handling 529 if test "x$TOOLCHAIN_TYPE" = xgcc; then 530 WARNING_CFLAGS_JDK_CONLY="$WARNINGS_ENABLE_ALL_CFLAGS" 531 WARNING_CFLAGS_JDK_CXXONLY="$WARNINGS_ENABLE_ALL_CXXFLAGS" 532 WARNING_CFLAGS_JVM="$WARNINGS_ENABLE_ALL_CXXFLAGS" 533 534 elif test "x$TOOLCHAIN_TYPE" = xclang; then 535 WARNING_CFLAGS="$WARNINGS_ENABLE_ALL" 536 537 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 538 WARNING_CFLAGS="$WARNINGS_ENABLE_ALL" 539 540 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 541 WARNING_CFLAGS="" # currently left empty 542 fi 543 544 # Set some additional per-OS defines. 545 546 # Additional macosx handling 547 if test "x$OPENJDK_TARGET_OS" = xmacosx; then 548 OS_CFLAGS="-DMAC_OS_X_VERSION_MIN_REQUIRED=$MACOSX_VERSION_MIN_NODOTS \ 549 -mmacosx-version-min=$MACOSX_VERSION_MIN" 550 551 if test -n "$MACOSX_VERSION_MAX"; then 552 OS_CFLAGS="$OS_CFLAGS \ 553 -DMAC_OS_X_VERSION_MAX_ALLOWED=$MACOSX_VERSION_MAX_NODOTS" 554 fi 555 fi 556 557 # Where does this really belong?? 558 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 559 PICFLAG="-fPIC" 560 PIEFLAG="-fPIE" 561 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 562 # '-qpic' defaults to 'qpic=small'. This means that the compiler generates only 563 # one instruction for accessing the TOC. If the TOC grows larger than 64K, the linker 564 # will have to patch this single instruction with a call to some out-of-order code which 565 # does the load from the TOC. This is of course slower, and we also would have 566 # to use '-bbigtoc' for linking anyway so we could also change the PICFLAG to 'qpic=large'. 567 # With 'qpic=large' the compiler will by default generate a two-instruction sequence which 568 # can be patched directly by the linker and does not require a jump to out-of-order code. 569 # 570 # Since large TOC causes perf. overhead, only pay it where we must. Currently this is 571 # for all libjvm variants (both gtest and normal) but no other binaries. So, build 572 # libjvm with -qpic=large and link with -bbigtoc. 573 JVM_PICFLAG="-qpic=large" 574 JDK_PICFLAG="-qpic" 575 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 576 PICFLAG="" 577 fi 578 579 if test "x$TOOLCHAIN_TYPE" != xxlc; then 580 JVM_PICFLAG="$PICFLAG" 581 JDK_PICFLAG="$PICFLAG" 582 fi 583 584 if test "x$OPENJDK_TARGET_OS" = xmacosx; then 585 # Linking is different on MacOSX 586 JDK_PICFLAG='' 587 if test "x$STATIC_BUILD" = xtrue; then 588 JVM_PICFLAG="" 589 fi 590 fi 591 592 # Optional POSIX functionality needed by the JVM 593 # 594 # Check if clock_gettime is available and in which library. This indicates 595 # availability of CLOCK_MONOTONIC for hotspot. But we don't need to link, so 596 # don't let it update LIBS. 597 save_LIBS="$LIBS" 598 AC_SEARCH_LIBS(clock_gettime, rt, [HAS_CLOCK_GETTIME=true], []) 599 if test "x$LIBS" = "x-lrt "; then 600 CLOCK_GETTIME_IN_LIBRT=true 601 fi 602 LIBS="$save_LIBS" 603 604 if test "x$HAS_CLOCK_GETTIME" = "xtrue"; then 605 OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DSUPPORTS_CLOCK_MONOTONIC" 606 if test "x$CLOCK_GETTIME_IN_LIBRT" = "xtrue"; then 607 OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DNEEDS_LIBRT" 608 fi 609 fi 610 611 # Extra flags needed when building optional static versions of certain 612 # JDK libraries. 613 STATIC_LIBS_CFLAGS="-DSTATIC_BUILD=1" 614 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 615 STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS -ffunction-sections -fdata-sections \ 616 -DJNIEXPORT='__attribute__((visibility(\"hidden\")))'" 617 else 618 STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS -DJNIEXPORT=" 619 fi 620 if test "x$TOOLCHAIN_TYPE" = xgcc; then 621 # Disable relax-relocation to enable compatibility with older linkers 622 RELAX_RELOCATIONS_FLAG="-Xassembler -mrelax-relocations=no" 623 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${RELAX_RELOCATIONS_FLAG}], 624 IF_TRUE: [STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS ${RELAX_RELOCATIONS_FLAG}"]) 625 fi 626 AC_SUBST(STATIC_LIBS_CFLAGS) 627 ]) 628 629 ################################################################################ 630 # $1 - Either BUILD or TARGET to pick the correct OS/CPU variables to check 631 # conditionals against. 632 # $2 - Optional prefix for each variable defined. 633 # $3 - Optional prefix for compiler variables (either BUILD_ or nothing). 634 AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP], 635 [ 636 #### CPU DEFINES, these should (in theory) be independent on toolchain 637 638 # Setup target CPU 639 # Setup endianness 640 if test "x$FLAGS_CPU_ENDIAN" = xlittle; then 641 $1_DEFINES_CPU_JVM="-DVM_LITTLE_ENDIAN" 642 $1_DEFINES_CPU_JDK="-D_LITTLE_ENDIAN" 643 else 644 $1_DEFINES_CPU_JDK="-D_BIG_ENDIAN" 645 fi 646 647 # setup CPU bit size 648 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -DARCH='\"$FLAGS_CPU_LEGACY\"' \ 649 -D$FLAGS_CPU_LEGACY" 650 651 if test "x$FLAGS_CPU_BITS" = x64; then 652 # -D_LP64=1 is only set on linux and mac. Setting on windows causes diff in 653 # unpack200.exe. 654 if test "x$FLAGS_OS" = xlinux || test "x$FLAGS_OS" = xmacosx; then 655 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_LP64=1" 656 fi 657 if test "x$FLAGS_OS" != xaix; then 658 # xlc on AIX defines _LP64=1 by default and issues a warning if we redefine it. 659 $1_DEFINES_CPU_JVM="${$1_DEFINES_CPU_JVM} -D_LP64=1" 660 fi 661 fi 662 663 # toolchain dependend, per-cpu 664 if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 665 if test "x$FLAGS_CPU" = xaarch64; then 666 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_ARM64_ -Darm64" 667 elif test "x$FLAGS_CPU" = xx86_64; then 668 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_AMD64_ -Damd64" 669 else 670 $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_X86_ -Dx86" 671 fi 672 fi 673 674 # CFLAGS PER CPU 675 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 676 # COMMON to gcc and clang 677 if test "x$FLAGS_CPU" = xx86; then 678 # Force compatibility with i586 on 32 bit intel platforms. 679 $1_CFLAGS_CPU="-march=i586" 680 fi 681 fi 682 683 if test "x$TOOLCHAIN_TYPE" = xgcc; then 684 if test "x$FLAGS_CPU" = xaarch64; then 685 # -Wno-psabi to get rid of annoying "note: parameter passing for argument of type '<type> changed in GCC 9.1" 686 $1_CFLAGS_CPU="-Wno-psabi" 687 elif test "x$FLAGS_CPU" = xarm; then 688 # -Wno-psabi to get rid of annoying "note: the mangling of 'va_list' has changed in GCC 4.4" 689 $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)\"'" 690 $1_CFLAGS_CPU_JVM="-DARM" 691 elif test "x$FLAGS_CPU_ARCH" = xppc; then 692 $1_CFLAGS_CPU_JVM="-minsert-sched-nops=regroup_exact -mno-multiple -mno-string" 693 if test "x$FLAGS_CPU" = xppc64; then 694 # -mminimal-toc fixes `relocation truncated to fit' error for gcc 4.1. 695 # Use ppc64 instructions, but schedule for power5 696 $1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -mminimal-toc -mcpu=powerpc64 -mtune=power5" 697 elif test "x$FLAGS_CPU" = xppc64le; then 698 # Little endian machine uses ELFv2 ABI. 699 # Use Power8, this is the first CPU to support PPC64 LE with ELFv2 ABI. 700 $1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -DABI_ELFv2 -mcpu=power8 -mtune=power8" 701 fi 702 elif test "x$FLAGS_CPU" = xs390x; then 703 $1_CFLAGS_CPU="-mbackchain -march=z10" 704 fi 705 706 if test "x$FLAGS_CPU_ARCH" != xarm && test "x$FLAGS_CPU_ARCH" != xppc; then 707 # for all archs except arm and ppc, prevent gcc to omit frame pointer 708 $1_CFLAGS_CPU_JDK="${$1_CFLAGS_CPU_JDK} -fno-omit-frame-pointer" 709 fi 710 711 elif test "x$TOOLCHAIN_TYPE" = xclang; then 712 if test "x$FLAGS_OS" = xlinux; then 713 # ppc test not really needed for clang 714 if test "x$FLAGS_CPU_ARCH" != xarm && test "x$FLAGS_CPU_ARCH" != xppc; then 715 # for all archs except arm and ppc, prevent gcc to omit frame pointer 716 $1_CFLAGS_CPU_JDK="${$1_CFLAGS_CPU_JDK} -fno-omit-frame-pointer" 717 fi 718 fi 719 720 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 721 if test "x$FLAGS_CPU" = xppc64; then 722 $1_CFLAGS_CPU_JVM="-qarch=ppc64" 723 fi 724 725 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 726 if test "x$FLAGS_CPU" = xx86; then 727 $1_CFLAGS_CPU_JVM="-arch:IA32" 728 elif test "x$OPENJDK_TARGET_CPU" = xx86_64; then 729 if test "x$DEBUG_LEVEL" != xrelease; then 730 # NOTE: This is probably redundant; -homeparams is default on 731 # non-release builds. 732 $1_CFLAGS_CPU_JVM="-homeparams" 733 fi 734 fi 735 fi 736 737 if test "x$TOOLCHAIN_TYPE" = xgcc; then 738 FLAGS_SETUP_GCC6_COMPILER_FLAGS($1, $3) 739 $1_TOOLCHAIN_CFLAGS="${$1_GCC6_CFLAGS}" 740 741 $1_WARNING_CFLAGS_JVM="-Wno-format-zero-length -Wtype-limits -Wuninitialized" 742 fi 743 744 # Prevent the __FILE__ macro from generating absolute paths into the built 745 # binaries. Depending on toolchain, different mitigations are possible. 746 # * GCC and Clang of new enough versions have -fmacro-prefix-map. 747 # * For most other toolchains, supplying all source files and -I flags as 748 # relative paths fixes the issue. 749 FILE_MACRO_CFLAGS= 750 if test "x$ALLOW_ABSOLUTE_PATHS_IN_OUTPUT" = "xfalse"; then 751 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 752 # Check if compiler supports -fmacro-prefix-map. If so, use that to make 753 # the __FILE__ macro resolve to paths relative to the workspace root. 754 workspace_root_trailing_slash="${WORKSPACE_ROOT%/}/" 755 FILE_MACRO_CFLAGS="-fmacro-prefix-map=${workspace_root_trailing_slash}=" 756 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${FILE_MACRO_CFLAGS}], 757 PREFIX: $3, 758 IF_FALSE: [ 759 FILE_MACRO_CFLAGS= 760 ] 761 ) 762 fi 763 fi 764 AC_SUBST(FILE_MACRO_CFLAGS) 765 766 # EXPORT to API 767 CFLAGS_JVM_COMMON="$ALWAYS_CFLAGS_JVM $ALWAYS_DEFINES_JVM \ 768 $TOOLCHAIN_CFLAGS_JVM ${$1_TOOLCHAIN_CFLAGS_JVM} \ 769 $OS_CFLAGS $OS_CFLAGS_JVM $CFLAGS_OS_DEF_JVM $DEBUG_CFLAGS_JVM \ 770 $WARNING_CFLAGS $WARNING_CFLAGS_JVM $JVM_PICFLAG $FILE_MACRO_CFLAGS" 771 772 CFLAGS_JDK_COMMON="$ALWAYS_CFLAGS_JDK $ALWAYS_DEFINES_JDK $TOOLCHAIN_CFLAGS_JDK \ 773 $OS_CFLAGS $CFLAGS_OS_DEF_JDK $DEBUG_CFLAGS_JDK $DEBUG_OPTIONS_FLAGS_JDK \ 774 $WARNING_CFLAGS $WARNING_CFLAGS_JDK $DEBUG_SYMBOLS_CFLAGS_JDK \ 775 $FILE_MACRO_CFLAGS" 776 777 # Use ${$2EXTRA_CFLAGS} to block EXTRA_CFLAGS to be added to build flags. 778 # (Currently we don't have any OPENJDK_BUILD_EXTRA_CFLAGS, but that might 779 # change in the future.) 780 781 CFLAGS_JDK_COMMON_CONLY="$TOOLCHAIN_CFLAGS_JDK_CONLY \ 782 $WARNING_CFLAGS_JDK_CONLY ${$2EXTRA_CFLAGS}" 783 CFLAGS_JDK_COMMON_CXXONLY="$ALWAYS_DEFINES_JDK_CXXONLY \ 784 $TOOLCHAIN_CFLAGS_JDK_CXXONLY \ 785 ${$1_TOOLCHAIN_CFLAGS_JDK_CXXONLY} \ 786 $WARNING_CFLAGS_JDK_CXXONLY ${$2EXTRA_CXXFLAGS}" 787 788 $1_CFLAGS_JVM="${$1_DEFINES_CPU_JVM} ${$1_CFLAGS_CPU} ${$1_CFLAGS_CPU_JVM} ${$1_TOOLCHAIN_CFLAGS} ${$1_WARNING_CFLAGS_JVM}" 789 $1_CFLAGS_JDK="${$1_DEFINES_CPU_JDK} ${$1_CFLAGS_CPU} ${$1_CFLAGS_CPU_JDK} ${$1_TOOLCHAIN_CFLAGS}" 790 791 $2JVM_CFLAGS="$CFLAGS_JVM_COMMON ${$1_CFLAGS_JVM} ${$2EXTRA_CXXFLAGS}" 792 793 $2CFLAGS_JDKEXE="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CONLY ${$1_CFLAGS_JDK} $PIEFLAG" 794 $2CXXFLAGS_JDKEXE="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CXXONLY ${$1_CFLAGS_JDK} $PIEFLAG" 795 $2CFLAGS_JDKLIB="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CONLY ${$1_CFLAGS_JDK} \ 796 $JDK_PICFLAG ${$1_CFLAGS_CPU_JDK_LIBONLY}" 797 $2CXXFLAGS_JDKLIB="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CXXONLY ${$1_CFLAGS_JDK} \ 798 $JDK_PICFLAG ${$1_CFLAGS_CPU_JDK_LIBONLY}" 799 800 AC_SUBST($2JVM_CFLAGS) 801 AC_SUBST($2CFLAGS_JDKLIB) 802 AC_SUBST($2CFLAGS_JDKEXE) 803 AC_SUBST($2CXXFLAGS_JDKLIB) 804 AC_SUBST($2CXXFLAGS_JDKEXE) 805 AC_SUBST($2ADLC_LANGSTD_CXXFLAGS) 806 807 COMPILER_FP_CONTRACT_OFF_FLAG="-ffp-contract=off" 808 # Check that the compiler supports -ffp-contract=off flag 809 # Set FDLIBM_CFLAGS to -ffp-contract=off if it does. Empty 810 # otherwise. 811 # These flags are required for GCC-based builds of 812 # fdlibm with optimization without losing precision. 813 # Notably, -ffp-contract=off needs to be added for GCC >= 4.6. 814 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 815 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${COMPILER_FP_CONTRACT_OFF_FLAG}], 816 PREFIX: $3, 817 IF_TRUE: [$2FDLIBM_CFLAGS=${COMPILER_FP_CONTRACT_OFF_FLAG}], 818 IF_FALSE: [$2FDLIBM_CFLAGS=""]) 819 fi 820 AC_SUBST($2FDLIBM_CFLAGS) 821 ]) 822 823 # FLAGS_SETUP_GCC6_COMPILER_FLAGS([PREFIX]) 824 # Arguments: 825 # $1 - Prefix for each variable defined. 826 # $2 - Prefix for compiler variables (either BUILD_ or nothing). 827 AC_DEFUN([FLAGS_SETUP_GCC6_COMPILER_FLAGS], 828 [ 829 # These flags are required for GCC 6 builds as undefined behaviour in OpenJDK code 830 # runs afoul of the more aggressive versions of these optimisations. 831 # Notably, value range propagation now assumes that the this pointer of C++ 832 # member functions is non-null. 833 NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks" 834 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_DELETE_NULL_POINTER_CHECKS_CFLAG], 835 PREFIX: $2, IF_FALSE: [NO_DELETE_NULL_POINTER_CHECKS_CFLAG=""]) 836 NO_LIFETIME_DSE_CFLAG="-fno-lifetime-dse" 837 FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_LIFETIME_DSE_CFLAG], 838 PREFIX: $2, IF_FALSE: [NO_LIFETIME_DSE_CFLAG=""]) 839 $1_GCC6_CFLAGS="${NO_DELETE_NULL_POINTER_CHECKS_CFLAG} ${NO_LIFETIME_DSE_CFLAG}" 840 ])