#
# Copyright (c) 2011, 2022, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation. Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#
################################################################################
#
# Setup flags for C/C++ compiler
#
###############################################################################
#
# How to compile shared libraries.
#
AC_DEFUN([FLAGS_SETUP_SHARED_LIBS],
[
if test "x$TOOLCHAIN_TYPE" = xgcc; then
# Default works for linux, might work on other platforms as well.
SHARED_LIBRARY_FLAGS='-shared'
SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1'
SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN"
SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1'
SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1'
elif test "x$TOOLCHAIN_TYPE" = xclang; then
if test "x$OPENJDK_TARGET_OS" = xmacosx; then
# Linking is different on MacOSX
SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0"
SET_EXECUTABLE_ORIGIN='-Wl,-rpath,@loader_path$(or [$]1,/.)'
SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
SET_SHARED_LIBRARY_NAME='-Wl,-install_name,@rpath/[$]1'
SET_SHARED_LIBRARY_MAPFILE='-Wl,-exported_symbols_list,[$]1'
else
# Default works for linux, might work on other platforms as well.
SHARED_LIBRARY_FLAGS='-shared'
SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1'
SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1'
SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1'
# arm specific settings
if test "x$OPENJDK_TARGET_CPU" = "xarm"; then
# '-Wl,-z,origin' isn't used on arm.
SET_SHARED_LIBRARY_ORIGIN='-Wl,-rpath,\$$$$ORIGIN[$]1'
else
SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN"
fi
fi
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
SHARED_LIBRARY_FLAGS="-qmkshrobj -bM:SRE -bnoentry"
SET_EXECUTABLE_ORIGIN=""
SET_SHARED_LIBRARY_ORIGIN=''
SET_SHARED_LIBRARY_NAME=''
SET_SHARED_LIBRARY_MAPFILE=''
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
SHARED_LIBRARY_FLAGS="-dll"
SET_EXECUTABLE_ORIGIN=''
SET_SHARED_LIBRARY_ORIGIN=''
SET_SHARED_LIBRARY_NAME=''
SET_SHARED_LIBRARY_MAPFILE='-def:[$]1'
fi
AC_SUBST(SET_EXECUTABLE_ORIGIN)
AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)
AC_SUBST(SET_SHARED_LIBRARY_NAME)
AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)
AC_SUBST(SHARED_LIBRARY_FLAGS)
])
AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],
[
# By default don't set any specific assembler debug
# info flags for toolchains unless we know they work.
# See JDK-8207057.
ASFLAGS_DEBUG_SYMBOLS=""
# Debug prefix mapping if supported by compiler
DEBUG_PREFIX_CFLAGS=
# Debug symbols
if test "x$TOOLCHAIN_TYPE" = xgcc; then
if test "x$ALLOW_ABSOLUTE_PATHS_IN_OUTPUT" = "xfalse"; then
# Check if compiler supports -fdebug-prefix-map. If so, use that to make
# the debug symbol paths resolve to paths relative to the workspace root.
workspace_root_trailing_slash="${WORKSPACE_ROOT%/}/"
DEBUG_PREFIX_CFLAGS="-fdebug-prefix-map=${workspace_root_trailing_slash}="
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${DEBUG_PREFIX_CFLAGS}],
IF_FALSE: [
DEBUG_PREFIX_CFLAGS=
]
)
fi
CFLAGS_DEBUG_SYMBOLS="-g -gdwarf-4"
ASFLAGS_DEBUG_SYMBOLS="-g"
elif test "x$TOOLCHAIN_TYPE" = xclang; then
if test "x$ALLOW_ABSOLUTE_PATHS_IN_OUTPUT" = "xfalse"; then
# Check if compiler supports -fdebug-prefix-map. If so, use that to make
# the debug symbol paths resolve to paths relative to the workspace root.
workspace_root_trailing_slash="${WORKSPACE_ROOT%/}/"
DEBUG_PREFIX_CFLAGS="-fdebug-prefix-map=${workspace_root_trailing_slash}="
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${DEBUG_PREFIX_CFLAGS}],
IF_FALSE: [
DEBUG_PREFIX_CFLAGS=
]
)
fi
# -gdwarf-4 and -gdwarf-aranges were introduced in clang 5.0
GDWARF_FLAGS="-gdwarf-4 -gdwarf-aranges"
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${GDWARF_FLAGS}],
IF_FALSE: [GDWARF_FLAGS=""])
CFLAGS_DEBUG_SYMBOLS="-g ${GDWARF_FLAGS}"
ASFLAGS_DEBUG_SYMBOLS="-g"
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
CFLAGS_DEBUG_SYMBOLS="-g1"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
CFLAGS_DEBUG_SYMBOLS="-Z7"
fi
if test "x$DEBUG_PREFIX_CFLAGS" != x; then
CFLAGS_DEBUG_SYMBOLS="$CFLAGS_DEBUG_SYMBOLS $DEBUG_PREFIX_CFLAGS"
ASFLAGS_DEBUG_SYMBOLS="$ASFLAGS_DEBUG_SYMBOLS $DEBUG_PREFIX_CFLAGS"
fi
AC_SUBST(CFLAGS_DEBUG_SYMBOLS)
AC_SUBST(ASFLAGS_DEBUG_SYMBOLS)
])
AC_DEFUN([FLAGS_SETUP_WARNINGS],
[
# Set default value.
if test "x$TOOLCHAIN_TYPE" != xxlc; then
WARNINGS_AS_ERRORS_DEFAULT=true
else
WARNINGS_AS_ERRORS_DEFAULT=false
fi
UTIL_ARG_ENABLE(NAME: warnings-as-errors, DEFAULT: $WARNINGS_AS_ERRORS_DEFAULT,
RESULT: WARNINGS_AS_ERRORS,
DEFAULT_DESC: [auto],
DESC: [consider native warnings to be an error])
AC_SUBST(WARNINGS_AS_ERRORS)
case "${TOOLCHAIN_TYPE}" in
microsoft)
DISABLE_WARNING_PREFIX="-wd"
BUILD_CC_DISABLE_WARNING_PREFIX="-wd"
CFLAGS_WARNINGS_ARE_ERRORS="-WX"
WARNINGS_ENABLE_ALL="-W3"
DISABLED_WARNINGS="4800 5105"
;;
gcc)
DISABLE_WARNING_PREFIX="-Wno-"
BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-"
CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
# Additional warnings that are not activated by -Wall and -Wextra
WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wsign-compare \
-Wunused-function -Wundef -Wunused-value -Wreturn-type \
-Wtrampolines"
WARNINGS_ENABLE_ADDITIONAL_CXX="-Woverloaded-virtual -Wreorder"
WARNINGS_ENABLE_ALL_CFLAGS="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL"
WARNINGS_ENABLE_ALL_CXXFLAGS="$WARNINGS_ENABLE_ALL_CFLAGS $WARNINGS_ENABLE_ADDITIONAL_CXX"
DISABLED_WARNINGS="unused-parameter unused"
;;
clang)
DISABLE_WARNING_PREFIX="-Wno-"
BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-"
CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
# Additional warnings that are not activated by -Wall and -Wextra
WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wsign-compare -Wreorder \
-Wunused-function -Wundef -Wunused-value -Woverloaded-virtual"
WARNINGS_ENABLE_ALL="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL"
DISABLED_WARNINGS="unknown-warning-option unused-parameter unused"
;;
xlc)
DISABLE_WARNING_PREFIX="-Wno-"
CFLAGS_WARNINGS_ARE_ERRORS="-qhalt=w"
# Possibly a better subset than "all" is "lan:trx:ret:zea:cmp:ret"
WARNINGS_ENABLE_ALL="-qinfo=all -qformat=all"
DISABLED_WARNINGS=""
;;
esac
AC_SUBST(DISABLE_WARNING_PREFIX)
AC_SUBST(BUILD_CC_DISABLE_WARNING_PREFIX)
AC_SUBST(CFLAGS_WARNINGS_ARE_ERRORS)
AC_SUBST(DISABLED_WARNINGS)
AC_SUBST(DISABLED_WARNINGS_C)
AC_SUBST(DISABLED_WARNINGS_CXX)
])
AC_DEFUN([FLAGS_SETUP_QUALITY_CHECKS],
[
# bounds, memory and behavior checking options
if test "x$TOOLCHAIN_TYPE" = xgcc; then
case $DEBUG_LEVEL in
release )
# no adjustment
;;
fastdebug )
# no adjustment
;;
slowdebug )
# FIXME: By adding this to C(XX)FLAGS_DEBUG_OPTIONS/JVM_CFLAGS_SYMBOLS it
# gets added conditionally on whether we produce debug symbols or not.
# This is most likely not really correct.
# Add runtime stack smashing and undefined behavior checks.
CFLAGS_DEBUG_OPTIONS="-fstack-protector-all --param ssp-buffer-size=1"
CXXFLAGS_DEBUG_OPTIONS="-fstack-protector-all --param ssp-buffer-size=1"
JVM_CFLAGS_SYMBOLS="$JVM_CFLAGS_SYMBOLS -fstack-protector-all --param ssp-buffer-size=1"
;;
esac
fi
])
AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
[
if test "x$TOOLCHAIN_TYPE" = xgcc; then
C_O_FLAG_HIGHEST_JVM="-O3"
C_O_FLAG_HIGHEST="-O3"
C_O_FLAG_HI="-O3"
C_O_FLAG_NORM="-O2"
C_O_FLAG_SIZE="-Os"
C_O_FLAG_DEBUG="-O0"
C_O_FLAG_DEBUG_JVM="-O0"
C_O_FLAG_NONE="-O0"
# -D_FORTIFY_SOURCE=2 hardening option needs optimization (at least -O1) enabled
# set for lower O-levels -U_FORTIFY_SOURCE to overwrite previous settings
if test "x$OPENJDK_TARGET_OS" = xlinux -a "x$DEBUG_LEVEL" = "xfastdebug"; then
DISABLE_FORTIFY_CFLAGS="-U_FORTIFY_SOURCE"
# ASan doesn't work well with _FORTIFY_SOURCE
# See https://github.com/google/sanitizers/wiki/AddressSanitizer#faq
if test "x$ASAN_ENABLED" = xyes; then
ENABLE_FORTIFY_CFLAGS="${DISABLE_FORTIFY_CFLAGS}"
else
ENABLE_FORTIFY_CFLAGS="-D_FORTIFY_SOURCE=2"
fi
C_O_FLAG_HIGHEST_JVM="${C_O_FLAG_HIGHEST_JVM} ${ENABLE_FORTIFY_CFLAGS}"
C_O_FLAG_HIGHEST="${C_O_FLAG_HIGHEST} ${ENABLE_FORTIFY_CFLAGS}"
C_O_FLAG_HI="${C_O_FLAG_HI} ${ENABLE_FORTIFY_CFLAGS}"
C_O_FLAG_NORM="${C_O_FLAG_NORM} ${ENABLE_FORTIFY_CFLAGS}"
C_O_FLAG_SIZE="${C_O_FLAG_SIZE} ${DISABLE_FORTIFY_CFLAGS}"
C_O_FLAG_DEBUG="${C_O_FLAG_DEBUG} ${DISABLE_FORTIFY_CFLAGS}"
C_O_FLAG_DEBUG_JVM="${C_O_FLAG_DEBUG_JVM} ${DISABLE_FORTIFY_CFLAGS}"
C_O_FLAG_NONE="${C_O_FLAG_NONE} ${DISABLE_FORTIFY_CFLAGS}"
fi
elif test "x$TOOLCHAIN_TYPE" = xclang; then
C_O_FLAG_HIGHEST_JVM="-O3"
C_O_FLAG_HIGHEST="-O3"
C_O_FLAG_HI="-O3"
C_O_FLAG_NORM="-O2"
C_O_FLAG_DEBUG_JVM="-O0"
C_O_FLAG_SIZE="-Os"
C_O_FLAG_DEBUG="-O0"
C_O_FLAG_NONE="-O0"
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
C_O_FLAG_HIGHEST_JVM="-O3 -qhot=level=1 -qinline -qinlglue"
C_O_FLAG_HIGHEST="-O3 -qhot=level=1 -qinline -qinlglue"
C_O_FLAG_HI="-O3 -qinline -qinlglue"
C_O_FLAG_NORM="-O2"
C_O_FLAG_DEBUG="-qnoopt"
# FIXME: Value below not verified.
C_O_FLAG_DEBUG_JVM=""
C_O_FLAG_NONE="-qnoopt"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
C_O_FLAG_HIGHEST_JVM="-O2 -Oy-"
C_O_FLAG_HIGHEST="-O2"
C_O_FLAG_HI="-O1"
C_O_FLAG_NORM="-O1"
C_O_FLAG_DEBUG="-Od"
C_O_FLAG_DEBUG_JVM=""
C_O_FLAG_NONE="-Od"
C_O_FLAG_SIZE="-Os"
fi
# Now copy to C++ flags
CXX_O_FLAG_HIGHEST_JVM="$C_O_FLAG_HIGHEST_JVM"
CXX_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST"
CXX_O_FLAG_HI="$C_O_FLAG_HI"
CXX_O_FLAG_NORM="$C_O_FLAG_NORM"
CXX_O_FLAG_DEBUG="$C_O_FLAG_DEBUG"
CXX_O_FLAG_DEBUG_JVM="$C_O_FLAG_DEBUG_JVM"
CXX_O_FLAG_NONE="$C_O_FLAG_NONE"
CXX_O_FLAG_SIZE="$C_O_FLAG_SIZE"
# Adjust optimization flags according to debug level.
case $DEBUG_LEVEL in
release )
# no adjustment
;;
fastdebug )
# Not quite so much optimization
C_O_FLAG_HI="$C_O_FLAG_NORM"
CXX_O_FLAG_HI="$CXX_O_FLAG_NORM"
;;
slowdebug )
# Disable optimization
C_O_FLAG_HIGHEST_JVM="$C_O_FLAG_DEBUG_JVM"
C_O_FLAG_HIGHEST="$C_O_FLAG_DEBUG"
C_O_FLAG_HI="$C_O_FLAG_DEBUG"
C_O_FLAG_NORM="$C_O_FLAG_DEBUG"
C_O_FLAG_SIZE="$C_O_FLAG_DEBUG"
CXX_O_FLAG_HIGHEST_JVM="$CXX_O_FLAG_DEBUG_JVM"
CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_DEBUG"
CXX_O_FLAG_HI="$CXX_O_FLAG_DEBUG"
CXX_O_FLAG_NORM="$CXX_O_FLAG_DEBUG"
CXX_O_FLAG_SIZE="$CXX_O_FLAG_DEBUG"
;;
esac
AC_SUBST(C_O_FLAG_HIGHEST_JVM)
AC_SUBST(C_O_FLAG_HIGHEST)
AC_SUBST(C_O_FLAG_HI)
AC_SUBST(C_O_FLAG_NORM)
AC_SUBST(C_O_FLAG_NONE)
AC_SUBST(C_O_FLAG_SIZE)
AC_SUBST(CXX_O_FLAG_HIGHEST_JVM)
AC_SUBST(CXX_O_FLAG_HIGHEST)
AC_SUBST(CXX_O_FLAG_HI)
AC_SUBST(CXX_O_FLAG_NORM)
AC_SUBST(CXX_O_FLAG_NONE)
AC_SUBST(CXX_O_FLAG_SIZE)
])
AC_DEFUN([FLAGS_SETUP_CFLAGS],
[
### CFLAGS
FLAGS_SETUP_CFLAGS_HELPER
FLAGS_OS=$OPENJDK_TARGET_OS
FLAGS_OS_TYPE=$OPENJDK_TARGET_OS_TYPE
FLAGS_CPU=$OPENJDK_TARGET_CPU
FLAGS_CPU_ARCH=$OPENJDK_TARGET_CPU_ARCH
FLAGS_CPU_BITS=$OPENJDK_TARGET_CPU_BITS
FLAGS_CPU_ENDIAN=$OPENJDK_TARGET_CPU_ENDIAN
FLAGS_CPU_LEGACY=$OPENJDK_TARGET_CPU_LEGACY
FLAGS_CPU_LEGACY_LIB=$OPENJDK_TARGET_CPU_LEGACY_LIB
FLAGS_SETUP_CFLAGS_CPU_DEP([TARGET])
# Repeat the check for the BUILD_CC and BUILD_CXX. Need to also reset CFLAGS
# since any target specific flags will likely not work with the build compiler.
CC_OLD="$CC"
CXX_OLD="$CXX"
CFLAGS_OLD="$CFLAGS"
CXXFLAGS_OLD="$CXXFLAGS"
CC="$BUILD_CC"
CXX="$BUILD_CXX"
CFLAGS=""
CXXFLAGS=""
FLAGS_OS=$OPENJDK_BUILD_OS
FLAGS_OS_TYPE=$OPENJDK_BUILD_OS_TYPE
FLAGS_CPU=$OPENJDK_BUILD_CPU
FLAGS_CPU_ARCH=$OPENJDK_BUILD_CPU_ARCH
FLAGS_CPU_BITS=$OPENJDK_BUILD_CPU_BITS
FLAGS_CPU_ENDIAN=$OPENJDK_BUILD_CPU_ENDIAN
FLAGS_CPU_LEGACY=$OPENJDK_BUILD_CPU_LEGACY
FLAGS_CPU_LEGACY_LIB=$OPENJDK_BUILD_CPU_LEGACY_LIB
FLAGS_SETUP_CFLAGS_CPU_DEP([BUILD], [OPENJDK_BUILD_], [BUILD_])
CC="$CC_OLD"
CXX="$CXX_OLD"
CFLAGS="$CFLAGS_OLD"
CXXFLAGS="$CXXFLAGS_OLD"
])
################################################################################
# platform independent
AC_DEFUN([FLAGS_SETUP_CFLAGS_HELPER],
[
#### OS DEFINES, these should be independent on toolchain
if test "x$OPENJDK_TARGET_OS" = xlinux; then
CFLAGS_OS_DEF_JVM="-DLINUX"
CFLAGS_OS_DEF_JDK="-D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE"
elif test "x$OPENJDK_TARGET_OS" = xmacosx; then
CFLAGS_OS_DEF_JVM="-D_ALLBSD_SOURCE -D_DARWIN_C_SOURCE -D_XOPEN_SOURCE"
CFLAGS_OS_DEF_JDK="-D_ALLBSD_SOURCE -D_DARWIN_UNLIMITED_SELECT"
elif test "x$OPENJDK_TARGET_OS" = xaix; then
CFLAGS_OS_DEF_JVM="-DAIX"
elif test "x$OPENJDK_TARGET_OS" = xbsd; then
CFLAGS_OS_DEF_JDK="-D_ALLBSD_SOURCE"
elif test "x$OPENJDK_TARGET_OS" = xwindows; then
CFLAGS_OS_DEF_JVM="-D_WINDOWS -DWIN32 -D_JNI_IMPLEMENTATION_"
fi
CFLAGS_OS_DEF_JDK="$CFLAGS_OS_DEF_JDK -D$OPENJDK_TARGET_OS_UPPERCASE"
#### GLOBAL DEFINES
# Set some common defines. These works for all compilers, but assume
# -D is universally accepted.
# Always enable optional macros for VM.
ALWAYS_CFLAGS_JVM="-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS"
# Setup some hard coded includes
ALWAYS_CFLAGS_JDK=" \
-I\$(SUPPORT_OUTPUTDIR)/modules_include/java.base \
-I\$(SUPPORT_OUTPUTDIR)/modules_include/java.base/\$(OPENJDK_TARGET_OS_INCLUDE_SUBDIR) \
-I${TOPDIR}/src/java.base/share/native/libjava \
-I${TOPDIR}/src/java.base/$OPENJDK_TARGET_OS_TYPE/native/libjava \
-I${TOPDIR}/src/hotspot/share/include \
-I${TOPDIR}/src/hotspot/os/${HOTSPOT_TARGET_OS_TYPE}/include"
###############################################################################
# Adjust flags according to debug level.
# Setup debug/release defines
if test "x$DEBUG_LEVEL" = xrelease; then
DEBUG_CFLAGS_JDK="-DNDEBUG"
else
DEBUG_CFLAGS_JDK="-DDEBUG"
if test "x$TOOLCHAIN_TYPE" = xxlc; then
# We need '-qminimaltoc' or '-qpic=large -bbigtoc' if the TOC overflows.
# Hotspot now overflows its 64K TOC (currently only for debug),
# so for debug we build with '-qpic=large -bbigtoc'.
DEBUG_CFLAGS_JVM="-qpic=large"
fi
fi
if test "x$DEBUG_LEVEL" != xrelease; then
DEBUG_OPTIONS_FLAGS_JDK="$CFLAGS_DEBUG_OPTIONS"
DEBUG_SYMBOLS_CFLAGS_JDK="$CFLAGS_DEBUG_SYMBOLS"
fi
#### TOOLCHAIN DEFINES
if test "x$TOOLCHAIN_TYPE" = xgcc; then
ALWAYS_DEFINES_JVM="-D_GNU_SOURCE -D_REENTRANT"
elif test "x$TOOLCHAIN_TYPE" = xclang; then
ALWAYS_DEFINES_JVM="-D_GNU_SOURCE"
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
ALWAYS_DEFINES_JVM="-D_REENTRANT"
ALWAYS_DEFINES_JDK="-D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
# Access APIs for Windows 8 and above
# see https://docs.microsoft.com/en-us/cpp/porting/modifying-winver-and-win32-winnt?view=msvc-170
ALWAYS_DEFINES_JDK="-DWIN32_LEAN_AND_MEAN -D_WIN32_WINNT=0x0602 \
-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE -DWIN32 -DIAL"
ALWAYS_DEFINES_JVM="-DNOMINMAX -DWIN32_LEAN_AND_MEAN -D_WIN32_WINNT=0x0602 \
-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE \
-D_WINSOCK_DEPRECATED_NO_WARNINGS"
fi
###############################################################################
#
#
# CFLAGS BASIC
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
# COMMON to gcc and clang
TOOLCHAIN_CFLAGS_JVM="-pipe -fno-rtti -fno-exceptions \
-fvisibility=hidden -fno-strict-aliasing -fno-omit-frame-pointer"
fi
if test "x$TOOLCHAIN_TYPE" = xgcc; then
TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -fcheck-new -fstack-protector"
TOOLCHAIN_CFLAGS_JDK="-pipe -fstack-protector"
# reduce lib size on linux in link step, this needs also special compile flags
# do this on s390x also for libjvm (where serviceability agent is not supported)
if test "x$ENABLE_LINKTIME_GC" = xtrue; then
TOOLCHAIN_CFLAGS_JDK="$TOOLCHAIN_CFLAGS_JDK -ffunction-sections -fdata-sections"
if test "x$OPENJDK_TARGET_CPU" = xs390x; then
TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -ffunction-sections -fdata-sections"
fi
fi
# technically NOT for CXX (but since this gives *worse* performance, use
# no-strict-aliasing everywhere!)
TOOLCHAIN_CFLAGS_JDK_CONLY="-fno-strict-aliasing"
elif test "x$TOOLCHAIN_TYPE" = xclang; then
# Restrict the debug information created by Clang to avoid
# too big object files and speed the build up a little bit
# (see http://llvm.org/bugs/show_bug.cgi?id=7554)
TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -flimit-debug-info"
# In principle the stack alignment below is cpu- and ABI-dependent and
# should agree with values of StackAlignmentInBytes in various
# src/hotspot/cpu/*/globalDefinitions_*.hpp files, but this value currently
# works for all platforms.
TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -mno-omit-leaf-frame-pointer -mstack-alignment=16"
if test "x$OPENJDK_TARGET_OS" = xlinux; then
if test "x$DEBUG_LEVEL" = xrelease; then
# Clang does not inline as much as GCC does for functions with "inline" keyword by default.
# This causes noticeable slowdown in pause time for G1, and possibly in other areas.
# Increasing the inline hint threshold avoids the slowdown for Clang-built JVM.
TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -mllvm -inlinehint-threshold=100000"
fi
TOOLCHAIN_CFLAGS_JDK="-pipe"
TOOLCHAIN_CFLAGS_JDK_CONLY="-fno-strict-aliasing" # technically NOT for CXX
fi
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
# Suggested additions: -qsrcmsg to get improved error reporting
# set -qtbtable=full for a better traceback table/better stacks in hs_err when xlc16 is used
TOOLCHAIN_CFLAGS_JDK="-qtbtable=full -qchars=signed -qfullpath -qsaveopt -qstackprotect" # add on both CFLAGS
TOOLCHAIN_CFLAGS_JVM="-qtbtable=full -qtune=balanced -fno-exceptions \
-qalias=noansi -qstrict -qtls=default -qnortti -qnoeh -qignerrno -qstackprotect"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
TOOLCHAIN_CFLAGS_JVM="-nologo -MD -Zc:preprocessor -Zc:strictStrings -MP"
TOOLCHAIN_CFLAGS_JDK="-nologo -MD -Zc:preprocessor -Zc:strictStrings -Zc:wchar_t-"
fi
# CFLAGS C language level for JDK sources (hotspot only uses C++)
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang || test "x$TOOLCHAIN_TYPE" = xxlc; then
LANGSTD_CFLAGS="-std=c11"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
LANGSTD_CFLAGS="-std:c11"
fi
TOOLCHAIN_CFLAGS_JDK_CONLY="$LANGSTD_CFLAGS $TOOLCHAIN_CFLAGS_JDK_CONLY"
# CXXFLAGS C++ language level for all of JDK, including Hotspot.
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang || test "x$TOOLCHAIN_TYPE" = xxlc; then
LANGSTD_CXXFLAGS="-std=c++14"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
LANGSTD_CXXFLAGS="-std:c++14"
else
AC_MSG_ERROR([Don't know how to enable C++14 for this toolchain])
fi
TOOLCHAIN_CFLAGS_JDK_CXXONLY="$TOOLCHAIN_CFLAGS_JDK_CXXONLY $LANGSTD_CXXFLAGS"
TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM $LANGSTD_CXXFLAGS"
ADLC_LANGSTD_CXXFLAGS="$LANGSTD_CXXFLAGS"
# CFLAGS WARNINGS STUFF
# Set JVM_CFLAGS warning handling
if test "x$TOOLCHAIN_TYPE" = xgcc; then
WARNING_CFLAGS_JDK_CONLY="$WARNINGS_ENABLE_ALL_CFLAGS"
WARNING_CFLAGS_JDK_CXXONLY="$WARNINGS_ENABLE_ALL_CXXFLAGS"
WARNING_CFLAGS_JVM="$WARNINGS_ENABLE_ALL_CXXFLAGS"
elif test "x$TOOLCHAIN_TYPE" = xclang; then
WARNING_CFLAGS="$WARNINGS_ENABLE_ALL"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
WARNING_CFLAGS="$WARNINGS_ENABLE_ALL"
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
WARNING_CFLAGS="" # currently left empty
fi
# Set some additional per-OS defines.
# Additional macosx handling
if test "x$OPENJDK_TARGET_OS" = xmacosx; then
OS_CFLAGS="-DMAC_OS_X_VERSION_MIN_REQUIRED=$MACOSX_VERSION_MIN_NODOTS \
-mmacosx-version-min=$MACOSX_VERSION_MIN"
if test -n "$MACOSX_VERSION_MAX"; then
OS_CFLAGS="$OS_CFLAGS \
-DMAC_OS_X_VERSION_MAX_ALLOWED=$MACOSX_VERSION_MAX_NODOTS"
fi
fi
OS_CFLAGS="$OS_CFLAGS -DLIBC=$OPENJDK_TARGET_LIBC"
if test "x$OPENJDK_TARGET_LIBC" = xmusl; then
OS_CFLAGS="$OS_CFLAGS -DMUSL_LIBC"
fi
# Where does this really belong??
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
PICFLAG="-fPIC"
PIEFLAG="-fPIE"
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
# '-qpic' defaults to 'qpic=small'. This means that the compiler generates only
# one instruction for accessing the TOC. If the TOC grows larger than 64K, the linker
# will have to patch this single instruction with a call to some out-of-order code which
# does the load from the TOC. This is of course slower, and we also would have
# to use '-bbigtoc' for linking anyway so we could also change the PICFLAG to 'qpic=large'.
# With 'qpic=large' the compiler will by default generate a two-instruction sequence which
# can be patched directly by the linker and does not require a jump to out-of-order code.
#
# Since large TOC causes perf. overhead, only pay it where we must. Currently this is
# for all libjvm variants (both gtest and normal) but no other binaries. So, build
# libjvm with -qpic=large and link with -bbigtoc.
JVM_PICFLAG="-qpic=large"
JDK_PICFLAG="-qpic"
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
PICFLAG=""
fi
if test "x$TOOLCHAIN_TYPE" != xxlc; then
JVM_PICFLAG="$PICFLAG"
JDK_PICFLAG="$PICFLAG"
fi
if test "x$OPENJDK_TARGET_OS" = xmacosx; then
# Linking is different on MacOSX
JDK_PICFLAG=''
if test "x$STATIC_BUILD" = xtrue; then
JVM_PICFLAG=""
fi
fi
# Extra flags needed when building optional static versions of certain
# JDK libraries.
STATIC_LIBS_CFLAGS="-DSTATIC_BUILD=1"
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS -ffunction-sections -fdata-sections \
-DJNIEXPORT='__attribute__((visibility(\"hidden\")))'"
else
STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS -DJNIEXPORT="
fi
if test "x$TOOLCHAIN_TYPE" = xgcc; then
# Disable relax-relocation to enable compatibility with older linkers
RELAX_RELOCATIONS_FLAG="-Xassembler -mrelax-relocations=no"
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${RELAX_RELOCATIONS_FLAG}],
IF_TRUE: [STATIC_LIBS_CFLAGS="$STATIC_LIBS_CFLAGS ${RELAX_RELOCATIONS_FLAG}"])
fi
AC_SUBST(STATIC_LIBS_CFLAGS)
])
################################################################################
# $1 - Either BUILD or TARGET to pick the correct OS/CPU variables to check
# conditionals against.
# $2 - Optional prefix for each variable defined.
# $3 - Optional prefix for compiler variables (either BUILD_ or nothing).
AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
[
#### CPU DEFINES, these should (in theory) be independent on toolchain
# Setup target CPU
# Setup endianness
if test "x$FLAGS_CPU_ENDIAN" = xlittle; then
$1_DEFINES_CPU_JVM="-DVM_LITTLE_ENDIAN"
$1_DEFINES_CPU_JDK="-D_LITTLE_ENDIAN"
else
$1_DEFINES_CPU_JDK="-D_BIG_ENDIAN"
fi
# setup CPU bit size
$1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -DARCH='\"$FLAGS_CPU_LEGACY\"' \
-D$FLAGS_CPU_LEGACY"
if test "x$FLAGS_CPU_BITS" = x64 && test "x$FLAGS_OS" != xaix; then
# xlc on AIX defines _LP64=1 by default and issues a warning if we redefine it.
$1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_LP64=1"
$1_DEFINES_CPU_JVM="${$1_DEFINES_CPU_JVM} -D_LP64=1"
fi
# toolchain dependent, per-cpu
if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
if test "x$FLAGS_CPU" = xaarch64; then
$1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_ARM64_ -Darm64"
elif test "x$FLAGS_CPU" = xx86_64; then
$1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_AMD64_ -Damd64"
else
$1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_X86_ -Dx86"
fi
fi
# CFLAGS PER CPU
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
# COMMON to gcc and clang
AC_MSG_CHECKING([if $1 is x86])
if test "x$FLAGS_CPU" = xx86; then
AC_MSG_RESULT([yes])
AC_MSG_CHECKING([if control flow protection is enabled by additional compiler flags])
if echo "${EXTRA_CFLAGS}${EXTRA_CXXFLAGS}${EXTRA_ASFLAGS}" | ${GREP} -q 'fcf-protection' ; then
# cf-protection requires CMOV and thus i686
$1_CFLAGS_CPU="-march=i686"
AC_MSG_RESULT([yes, forcing ${$1_CFLAGS_CPU}])
else
# Force compatibility with i586 on 32 bit intel platforms.
$1_CFLAGS_CPU="-march=i586"
AC_MSG_RESULT([no, forcing ${$1_CFLAGS_CPU}])
fi
else
AC_MSG_RESULT([no])
fi
fi
if test "x$TOOLCHAIN_TYPE" = xgcc; then
if test "x$FLAGS_CPU" = xaarch64; then
# -Wno-psabi to get rid of annoying "note: parameter passing for argument of type '<type> changed in GCC 9.1"
$1_CFLAGS_CPU="-Wno-psabi"
elif test "x$FLAGS_CPU" = xarm; then
# -Wno-psabi to get rid of annoying "note: the mangling of 'va_list' has changed in GCC 4.4"
$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)\"'"
$1_CFLAGS_CPU_JVM="-DARM"
elif test "x$FLAGS_CPU_ARCH" = xppc; then
$1_CFLAGS_CPU_JVM="-minsert-sched-nops=regroup_exact -mno-multiple -mno-string"
if test "x$FLAGS_CPU" = xppc64; then
# -mminimal-toc fixes `relocation truncated to fit' error for gcc 4.1.
# Use ppc64 instructions, but schedule for power5
$1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -mminimal-toc -mcpu=powerpc64 -mtune=power5"
elif test "x$FLAGS_CPU" = xppc64le; then
# Little endian machine uses ELFv2 ABI.
# Use Power8, this is the first CPU to support PPC64 LE with ELFv2 ABI.
$1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -DABI_ELFv2 -mcpu=power8 -mtune=power8"
fi
elif test "x$FLAGS_CPU" = xs390x; then
$1_CFLAGS_CPU="-mbackchain -march=z10"
fi
if test "x$FLAGS_CPU_ARCH" != xarm && test "x$FLAGS_CPU_ARCH" != xppc; then
# for all archs except arm and ppc, prevent gcc to omit frame pointer
$1_CFLAGS_CPU_JDK="${$1_CFLAGS_CPU_JDK} -fno-omit-frame-pointer"
fi
elif test "x$TOOLCHAIN_TYPE" = xclang; then
if test "x$FLAGS_OS" = xlinux; then
# ppc test not really needed for clang
if test "x$FLAGS_CPU_ARCH" != xarm && test "x$FLAGS_CPU_ARCH" != xppc; then
# for all archs except arm and ppc, prevent gcc to omit frame pointer
$1_CFLAGS_CPU_JDK="${$1_CFLAGS_CPU_JDK} -fno-omit-frame-pointer"
fi
fi
elif test "x$TOOLCHAIN_TYPE" = xxlc; then
if test "x$FLAGS_CPU" = xppc64; then
$1_CFLAGS_CPU_JVM="-qarch=ppc64"
fi
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
if test "x$FLAGS_CPU" = xx86; then
$1_CFLAGS_CPU_JVM="-arch:IA32"
elif test "x$OPENJDK_TARGET_CPU" = xx86_64; then
if test "x$DEBUG_LEVEL" != xrelease; then
# NOTE: This is probably redundant; -homeparams is default on
# non-release builds.
$1_CFLAGS_CPU_JVM="-homeparams"
fi
fi
fi
if test "x$TOOLCHAIN_TYPE" = xgcc; then
FLAGS_SETUP_GCC6_COMPILER_FLAGS($1, $3)
$1_TOOLCHAIN_CFLAGS="${$1_GCC6_CFLAGS}"
$1_WARNING_CFLAGS_JVM="-Wno-format-zero-length -Wtype-limits -Wuninitialized"
elif test "x$TOOLCHAIN_TYPE" = xclang; then
NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks"
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_DELETE_NULL_POINTER_CHECKS_CFLAG],
PREFIX: $3,
IF_FALSE: [
NO_DELETE_NULL_POINTER_CHECKS_CFLAG=
]
)
$1_TOOLCHAIN_CFLAGS="${NO_DELETE_NULL_POINTER_CHECKS_CFLAG}"
fi
if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
REPRODUCIBLE_CFLAGS="-experimental:deterministic"
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${REPRODUCIBLE_CFLAGS}],
PREFIX: $3,
IF_FALSE: [
REPRODUCIBLE_CFLAGS=
]
)
fi
# Prevent the __FILE__ macro from generating absolute paths into the built
# binaries. Depending on toolchain, different mitigations are possible.
# * GCC and Clang of new enough versions have -fmacro-prefix-map.
# * For most other toolchains, supplying all source files and -I flags as
# relative paths fixes the issue.
FILE_MACRO_CFLAGS=
if test "x$ALLOW_ABSOLUTE_PATHS_IN_OUTPUT" = "xfalse"; then
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
# Check if compiler supports -fmacro-prefix-map. If so, use that to make
# the __FILE__ macro resolve to paths relative to the workspace root.
workspace_root_trailing_slash="${WORKSPACE_ROOT%/}/"
FILE_MACRO_CFLAGS="-fmacro-prefix-map=${workspace_root_trailing_slash}="
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${FILE_MACRO_CFLAGS}],
PREFIX: $3,
IF_FALSE: [
FILE_MACRO_CFLAGS=
]
)
elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
# There is a known issue with the pathmap if the mapping is made to the
# empty string. Add a minimal string "s" as prefix to work around this.
# PATHMAP_FLAGS is also added to LDFLAGS in flags-ldflags.m4.
PATHMAP_FLAGS="-pathmap:${WORKSPACE_ROOT}=s"
FILE_MACRO_CFLAGS="$PATHMAP_FLAGS"
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${FILE_MACRO_CFLAGS}],
PREFIX: $3,
IF_FALSE: [
PATHMAP_FLAGS=
FILE_MACRO_CFLAGS=
]
)
fi
AC_MSG_CHECKING([how to prevent absolute paths in output])
if test "x$FILE_MACRO_CFLAGS" != x; then
AC_MSG_RESULT([using compiler options])
else
AC_MSG_RESULT([using relative paths])
fi
fi
AC_SUBST(FILE_MACRO_CFLAGS)
FLAGS_SETUP_BRANCH_PROTECTION
# EXPORT to API
CFLAGS_JVM_COMMON="$ALWAYS_CFLAGS_JVM $ALWAYS_DEFINES_JVM \
$TOOLCHAIN_CFLAGS_JVM ${$1_TOOLCHAIN_CFLAGS_JVM} \
$OS_CFLAGS $OS_CFLAGS_JVM $CFLAGS_OS_DEF_JVM $DEBUG_CFLAGS_JVM \
$WARNING_CFLAGS $WARNING_CFLAGS_JVM $JVM_PICFLAG $FILE_MACRO_CFLAGS \
$REPRODUCIBLE_CFLAGS $BRANCH_PROTECTION_CFLAGS"
CFLAGS_JDK_COMMON="$ALWAYS_CFLAGS_JDK $ALWAYS_DEFINES_JDK $TOOLCHAIN_CFLAGS_JDK \
$OS_CFLAGS $CFLAGS_OS_DEF_JDK $DEBUG_CFLAGS_JDK $DEBUG_OPTIONS_FLAGS_JDK \
$WARNING_CFLAGS $WARNING_CFLAGS_JDK $DEBUG_SYMBOLS_CFLAGS_JDK \
$FILE_MACRO_CFLAGS $REPRODUCIBLE_CFLAGS $BRANCH_PROTECTION_CFLAGS"
# Use ${$2EXTRA_CFLAGS} to block EXTRA_CFLAGS to be added to build flags.
# (Currently we don't have any OPENJDK_BUILD_EXTRA_CFLAGS, but that might
# change in the future.)
CFLAGS_JDK_COMMON_CONLY="$TOOLCHAIN_CFLAGS_JDK_CONLY \
$WARNING_CFLAGS_JDK_CONLY ${$2EXTRA_CFLAGS}"
CFLAGS_JDK_COMMON_CXXONLY="$ALWAYS_DEFINES_JDK_CXXONLY \
$TOOLCHAIN_CFLAGS_JDK_CXXONLY \
${$1_TOOLCHAIN_CFLAGS_JDK_CXXONLY} \
$WARNING_CFLAGS_JDK_CXXONLY ${$2EXTRA_CXXFLAGS}"
$1_CFLAGS_JVM="${$1_DEFINES_CPU_JVM} ${$1_CFLAGS_CPU} ${$1_CFLAGS_CPU_JVM} ${$1_TOOLCHAIN_CFLAGS} ${$1_WARNING_CFLAGS_JVM}"
$1_CFLAGS_JDK="${$1_DEFINES_CPU_JDK} ${$1_CFLAGS_CPU} ${$1_CFLAGS_CPU_JDK} ${$1_TOOLCHAIN_CFLAGS}"
$2JVM_CFLAGS="$CFLAGS_JVM_COMMON ${$1_CFLAGS_JVM} ${$2EXTRA_CXXFLAGS}"
$2CFLAGS_JDKEXE="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CONLY ${$1_CFLAGS_JDK} $PIEFLAG"
$2CXXFLAGS_JDKEXE="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CXXONLY ${$1_CFLAGS_JDK} $PIEFLAG"
$2CFLAGS_JDKLIB="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CONLY ${$1_CFLAGS_JDK} \
$JDK_PICFLAG ${$1_CFLAGS_CPU_JDK_LIBONLY}"
$2CXXFLAGS_JDKLIB="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CXXONLY ${$1_CFLAGS_JDK} \
$JDK_PICFLAG ${$1_CFLAGS_CPU_JDK_LIBONLY}"
AC_SUBST($2JVM_CFLAGS)
AC_SUBST($2CFLAGS_JDKLIB)
AC_SUBST($2CFLAGS_JDKEXE)
AC_SUBST($2CXXFLAGS_JDKLIB)
AC_SUBST($2CXXFLAGS_JDKEXE)
AC_SUBST($2ADLC_LANGSTD_CXXFLAGS)
COMPILER_FP_CONTRACT_OFF_FLAG="-ffp-contract=off"
# Check that the compiler supports -ffp-contract=off flag
# Set FDLIBM_CFLAGS to -ffp-contract=off if it does. Empty
# otherwise.
# These flags are required for GCC-based builds of
# fdlibm with optimization without losing precision.
# Notably, -ffp-contract=off needs to be added for GCC >= 4.6.
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${COMPILER_FP_CONTRACT_OFF_FLAG}],
PREFIX: $3,
IF_TRUE: [$2FDLIBM_CFLAGS=${COMPILER_FP_CONTRACT_OFF_FLAG}],
IF_FALSE: [$2FDLIBM_CFLAGS=""])
fi
AC_SUBST($2FDLIBM_CFLAGS)
])
# FLAGS_SETUP_GCC6_COMPILER_FLAGS([PREFIX])
# Arguments:
# $1 - Prefix for each variable defined.
# $2 - Prefix for compiler variables (either BUILD_ or nothing).
AC_DEFUN([FLAGS_SETUP_GCC6_COMPILER_FLAGS],
[
# These flags are required for GCC 6 builds as undefined behavior in OpenJDK code
# runs afoul of the more aggressive versions of these optimizations.
# Notably, value range propagation now assumes that the this pointer of C++
# member functions is non-null.
NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks"
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_DELETE_NULL_POINTER_CHECKS_CFLAG],
PREFIX: $2, IF_FALSE: [NO_DELETE_NULL_POINTER_CHECKS_CFLAG=""])
NO_LIFETIME_DSE_CFLAG="-fno-lifetime-dse"
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_LIFETIME_DSE_CFLAG],
PREFIX: $2, IF_FALSE: [NO_LIFETIME_DSE_CFLAG=""])
$1_GCC6_CFLAGS="${NO_DELETE_NULL_POINTER_CHECKS_CFLAG} ${NO_LIFETIME_DSE_CFLAG}"
])
AC_DEFUN_ONCE([FLAGS_SETUP_BRANCH_PROTECTION],
[
# Is branch protection available?
BRANCH_PROTECTION_AVAILABLE=false
BRANCH_PROTECTION_FLAG="-mbranch-protection=standard"
if test "x$OPENJDK_TARGET_CPU" = xaarch64; then
if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${BRANCH_PROTECTION_FLAG}],
IF_TRUE: [BRANCH_PROTECTION_AVAILABLE=true])
fi
fi
BRANCH_PROTECTION_CFLAGS=""
UTIL_ARG_ENABLE(NAME: branch-protection, DEFAULT: false,
RESULT: USE_BRANCH_PROTECTION, AVAILABLE: $BRANCH_PROTECTION_AVAILABLE,
DESC: [enable branch protection when compiling C/C++],
IF_ENABLED: [ BRANCH_PROTECTION_CFLAGS=${BRANCH_PROTECTION_FLAG}])
AC_SUBST(BRANCH_PROTECTION_CFLAGS)
])
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