#
# Copyright (c) 2011, 2019, 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
    C_FLAG_REORDER=''

    # 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
    C_FLAG_REORDER=''

    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$TOOLCHAIN_TYPE" = xsolstudio; then
    C_FLAG_REORDER='-xF'
    SHARED_LIBRARY_FLAGS="-G"
    SET_EXECUTABLE_ORIGIN='-R\$$ORIGIN[$]1'
    SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
    SET_SHARED_LIBRARY_NAME='-h [$]1'
    SET_SHARED_LIBRARY_MAPFILE='-M[$]1'

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
    C_FLAG_REORDER=''
    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$TOOLCHAIN_TYPE" = xmicrosoft; then
    C_FLAG_REORDER=''
    SHARED_LIBRARY_FLAGS="-dll"
    SET_EXECUTABLE_ORIGIN=''
    SET_SHARED_LIBRARY_ORIGIN=''
    SET_SHARED_LIBRARY_NAME=''
    SET_SHARED_LIBRARY_MAPFILE='-def:[$]1'
  fi

  AC_SUBST(C_FLAG_REORDER)
  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 symbols
  if test "x$TOOLCHAIN_TYPE" = xgcc; then
    CFLAGS_DEBUG_SYMBOLS="-g"
    ASFLAGS_DEBUG_SYMBOLS="-g"
  elif test "x$TOOLCHAIN_TYPE" = xclang; then
    CFLAGS_DEBUG_SYMBOLS="-g"
    ASFLAGS_DEBUG_SYMBOLS="-g"
  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
    # -g0 enables debug symbols without disabling inlining.
    CFLAGS_DEBUG_SYMBOLS="-g0 -xs"
  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
    CFLAGS_DEBUG_SYMBOLS="-g1"
  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
    CFLAGS_DEBUG_SYMBOLS="-Z7 -d2Zi+"
  fi

  AC_SUBST(CFLAGS_DEBUG_SYMBOLS)
  AC_SUBST(ASFLAGS_DEBUG_SYMBOLS)
])

AC_DEFUN([FLAGS_SETUP_WARNINGS],
[
  AC_ARG_ENABLE([warnings-as-errors], [AS_HELP_STRING([--disable-warnings-as-errors],
      [do not consider native warnings to be an error @<:@enabled@:>@])])

  # Set default value.
  if test "x$TOOLCHAIN_TYPE" = xxlc; then
    WARNINGS_AS_ERRORS=false
  else
    WARNINGS_AS_ERRORS=true
  fi

  AC_MSG_CHECKING([if native warnings are errors])
  if test "x$enable_warnings_as_errors" = "xyes"; then
    AC_MSG_RESULT([yes (explicitly set)])
    WARNINGS_AS_ERRORS=true
  elif test "x$enable_warnings_as_errors" = "xno"; then
    AC_MSG_RESULT([no (explicitly set)])
    WARNINGS_AS_ERRORS=false
  elif test "x$enable_warnings_as_errors" = "x"; then
    AC_MSG_RESULT([${WARNINGS_AS_ERRORS} (default)])
  else
    AC_MSG_ERROR([--enable-warnings-as-errors accepts no argument])
  fi

  AC_SUBST(WARNINGS_AS_ERRORS)

  LDFLAGS_WARNINGS_ARE_ERRORS=""
  case "${TOOLCHAIN_TYPE}" in
    microsoft)
      DISABLE_WARNING_PREFIX="-wd"
      CFLAGS_WARNINGS_ARE_ERRORS="-WX"

      # 4061
      #WARNINGS_ENABLE_ALL="-Wall"
      WARNINGS_ENABLE_ALL="-W3"
      # W4 and Wall is higher but is too link-like.
      #WARNINGS_ENABLE_ALL="-W4"
      # 4061, 4062 = enum not handled
      # 4130
      #EVEN_MORE="4054 4055 4057 4100 4127 4131 4132 4152 4201 4204 4206 4210 4232 4244 4255 4263 4264 4295 4302 4306 4311 4324 4366 4388 4512 4548 4555 4574 4800 4986 4987"
      #INIT_DISABLE=" 4189 4191 4211 4242 4245 4265 4287 4296 4310 4312 4350 4355 4365 4389 4505 4510 4514 4571 4610 4619 4623 4625 4626 4640 4668 4701 4702 4703 4706 4710 4711 4820 4917 4946 $EVEN_MORE"
      #DISABLED_WARNINGS_WALL="4061 4062 $INIT_DISABLE"
      RETRY_W4_HOTSPOT="4189 4211 4245 4310 4389 4505 4510 4610 4701 4702 4703 4706"
      RETRY_W4_JDK="4054 4055 4057 4100 4127 4130 4131 4132 4152 4201 4204 4206 4210 4232 4244 4295 4306 4324 4366 4512 4800"
      DISABLED_WARNINGS="4456"
# make sure we get this one:     WARNING_CFLAGS_JVM="-wd4800" (-Wreorder)
      #was: $RETRY_W4_HOTSPOT $RETRY_W4_JDK 4061 4242 4255 4265 4365 4456 4459 4514 4619 4623 4625 4626 4668 4710 4820 5026 5027 5038 5039 4596 4571 4577 4605 4774"
      ;;

    solstudio)
      DISABLE_WARNING_PREFIX="-erroff="
      CFLAGS_WARNINGS_ARE_ERRORS="-errwarn=%all"
      LDFLAGS_WARNINGS_ARE_ERRORS="-Wl,-z,fatal-warnings"

      WARNINGS_ENABLE_ALL_CFLAGS="-v -fd -xtransition"
      WARNINGS_ENABLE_ALL_CXXFLAGS="+w +w2"

      DISABLED_WARNINGS_C="E_OLD_STYLE_FUNC_DECL E_OLD_STYLE_FUNC_DEF E_SEMANTICS_OF_OP_CHG_IN_ANSI_C E_NO_REPLACEMENT_IN_STRING E_DECLARATION_IN_CODE"
      DISABLED_WARNINGS_CXX="inllargeuse inllargeint notused wemptydecl notemsource"
      # helpful quality checks, should not be disabled: inllargeuse inllargeint
      ;;

    gcc)
      DISABLE_WARNING_PREFIX="-Wno-"
      CFLAGS_WARNINGS_ARE_ERRORS="-Werror"
      # -Wall -Wextra does not enable all warnings. We add some more that we
      # consider relevant:
      # logical-op cannot be used due to https://gcc.gnu.org/bugzilla//show_bug.cgi?id=69602
      WARNINGS_ENABLE_ADDITIONAL="-Wpointer-arith -Wundef -Winit-self -Wpacked -Wdisabled-optimization -Wtrampolines"
      WARNINGS_ENABLE_ADDITIONAL_CXX="-Wc++0x-compat -Wreorder -Wnoexcept -Woverloaded-virtual -Wdelete-non-virtual-dtor -Wwrite-strings -Wstrict-null-sentinel"

      WARNINGS_ENABLE_ALL="-Wall -Wextra -Wformat=2 $WARNINGS_ENABLE_ADDITIONAL"
      WARNINGS_ENABLE_ALL_CXXFLAGS="$WARNINGS_ENABLE_ADDITIONAL_CXX"

      DISABLED_WARNINGS_JUST_GET_THIS_PASS="unused-variable unused-function unused-but-set-variable undef unused-value unused-label pointer-arith"
      DISABLED_WARNINGS="unused-parameter $DISABLED_WARNINGS_JUST_GET_THIS_PASS"

      # Repeate 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"
      CC="$BUILD_CC"
      CXX="$BUILD_CXX"
      CFLAGS_OLD="$CFLAGS"
      CFLAGS=""
      BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-"
      CC="$CC_OLD"
      CXX="$CXX_OLD"
      CFLAGS="$CFLAGS_OLD"
      ;;

    clang)
      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"

      if test "x$OPENJDK_TARGET_OS" = xmacosx; then
        # missing-method-return-type triggers in JavaNativeFoundation framework
        DISABLED_WARNINGS="$DISABLED_WARNINGS missing-method-return-type"
      fi

      ;;

    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(LDFLAGS_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
      # get's 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 -Wstack-protector"
      CXXFLAGS_DEBUG_OPTIONS="-fstack-protector-all --param ssp-buffer-size=1 -Wstack-protector"

      JVM_CFLAGS_SYMBOLS="$JVM_CFLAGS_SYMBOLS -fstack-protector-all --param ssp-buffer-size=1 -Wstack-protector"
      ;;
    esac
  fi
])

AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
[
  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
    CC_HIGHEST="-fns -fsimple -fsingle -xbuiltin=%all -xdepend -xrestrict -xlibmil"

    C_O_FLAG_HIGHEST_JVM="-xO4"
    C_O_FLAG_DEBUG_JVM=""
    C_O_FLAG_SIZE=""
    C_O_FLAG_DEBUG=""
    C_O_FLAG_NONE=""
    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86"; then
      C_O_FLAG_HIGHEST="-xO4 -Wu,-O4~yz $CC_HIGHEST"
      C_O_FLAG_HI="-xO4 -Wu,-O4~yz"
      C_O_FLAG_NORM="-xO2 -Wu,-O2~yz"
    elif test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then
      C_O_FLAG_HIGHEST="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0 \
          -xprefetch=auto,explicit $CC_HIGHEST"
      C_O_FLAG_HI="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0"
      C_O_FLAG_NORM="-xO2 -Wc,-Qrm-s -Wc,-Qiselect-T0"
    fi
  elif test "x$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
      ENABLE_FORTIFY_CFLAGS="-D_FORTIFY_SOURCE=2"
      DISABLE_FORTIFY_CFLAGS="-U_FORTIFY_SOURCE"
      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
    if test "x$OPENJDK_TARGET_OS" = xmacosx; then
      # On MacOSX we optimize for size, something
      # we should do for all platforms?
      C_O_FLAG_HIGHEST_JVM="-Os"
      C_O_FLAG_HIGHEST="-Os"
      C_O_FLAG_HI="-Os"
      C_O_FLAG_NORM="-Os"
      C_O_FLAG_DEBUG_JVM=""
    else
      C_O_FLAG_HIGHEST_JVM="-O3"
      C_O_FLAG_HIGHEST="-O3"
      C_O_FLAG_HI="-O3"
      C_O_FLAG_NORM="-O2"
      C_O_FLAG_DEBUG_JVM="-O0"
    fi
    C_O_FLAG_SIZE="-Os"
    C_O_FLAG_DEBUG="-O0"
    C_O_FLAG_NONE="-O0"
  elif test "x$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"

  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
    # In solstudio, also add this to C (but not C++) flags...
    C_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST -xalias_level=basic"
  fi

  # 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])

  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_])
])

################################################################################
# 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" = xsolaris; then
    CFLAGS_OS_DEF_JVM="-DSOLARIS"
    CFLAGS_OS_DEF_JDK="-D__solaris__"
  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$DEBUG_LEVEL" = xrelease; then
    DEBUG_CFLAGS_JDK="-DNDEBUG"
    if test "x$OPENJDK_TARGET_OS" = xsolaris; then
      DEBUG_CFLAGS_JDK="$DEBUG_CFLAGS_JDK -DTRIMMED"
    fi
  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$TOOLCHAIN_TYPE" = xsolstudio; then
    ALWAYS_DEFINES_JVM="-DSPARC_WORKS -D_Crun_inline_placement"
    ALWAYS_DEFINES_JDK="-DTRACING -DMACRO_MEMSYS_OPS -DBREAKPTS"
    ALWAYS_DEFINES_JDK_CXXONLY="-DCC_NOEX"
  elif test "x$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
    ALWAYS_DEFINES_JDK="-DWIN32_LEAN_AND_MEAN -D_CRT_SECURE_NO_DEPRECATE \
        -D_CRT_NONSTDC_NO_DEPRECATE -DWIN32 -DIAL"
    ALWAYS_DEFINES_JVM="-DNOMINMAX -DWIN32_LEAN_AND_MEAN"
  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"
    # 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" = xsolstudio; then
    TOOLCHAIN_FLAGS="-errtags -errfmt"
    TOOLCHAIN_CFLAGS="-errshort=tags"

    TOOLCHAIN_CFLAGS_JDK="-mt $TOOLCHAIN_FLAGS"
    TOOLCHAIN_CFLAGS_JDK_CONLY="-W0,-noglobal $TOOLCHAIN_CFLAGS" # C only
    TOOLCHAIN_CFLAGS_JDK_CXXONLY="-features=no%except -norunpath -xnolib" # CXX only
    TOOLCHAIN_CFLAGS_JVM="-template=no%extdef -features=no%split_init \
        -library=stlport4 -mt -features=no%except $TOOLCHAIN_FLAGS"
    if test "x$DEBUG_LEVEL" = xslowdebug; then
      # Previously -g was used instead of -g0 for slowdebug; this is equivalent
      # to setting +d.
      TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM +d"
    fi

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
    # Suggested additions: -qsrcmsg to get improved error reporting
    # set -qtbtable=full for a better traceback table/better stacks in hs_err when xlc16 is used
    TOOLCHAIN_CFLAGS_JDK="-qtbtable=full -qchars=signed -qfullpath -qsaveopt -qstackprotect"  # add on both CFLAGS
    TOOLCHAIN_CFLAGS_JVM="-qtbtable=full -qtune=balanced \
        -qalias=noansi -qstrict -qtls=default -qnortti -qnoeh -qignerrno -qstackprotect"
  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
    TOOLCHAIN_CFLAGS_JVM="-nologo -MD -MP"
    TOOLCHAIN_CFLAGS_JDK="-nologo -MD -Zc:wchar_t-"
  fi

  # CFLAGS C language level for JDK sources (hotspot only uses C++)
  # Ideally we would have a common level across all toolchains so that all sources
  # are sure to conform to the same standard. Unfortunately neither our sources nor
  # our toolchains are in a condition to support that. But what we loosely aim for is
  # C99 level.
  if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang || test "x$TOOLCHAIN_TYPE" = xxlc; then
    # This raises the language level for older 4.8 gcc, while lowering it for later
    # versions. clang and xlclang support the same flag.
    LANGSTD_CFLAGS="-std=c99"
  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
    # We can't turn on -std=c99 without breaking compilation of the splashscreen/png
    # utilities. But we can enable c99 as below (previously achieved by using -Xa).
    # It is the no_lib that makes the difference.
    LANGSTD_CFLAGS="-xc99=all,no_lib"
  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
    # MSVC doesn't support C99/C11 explicitly, unless you compile as C++:
    # LANGSTD_CFLAGS="/TP"
    # but that requires numerous changes to the sources files. So we are limited
    # to C89/C90 plus whatever extensions Visual Studio has decided to implement.
    # This is the lowest bar for shared code.
    LANGSTD_CFLAGS=""
  fi
  TOOLCHAIN_CFLAGS_JDK_CONLY="$LANGSTD_CFLAGS $TOOLCHAIN_CFLAGS_JDK_CONLY"

  # CFLAGS WARNINGS STUFF
  # Set JVM_CFLAGS warning handling
  if test "x$TOOLCHAIN_TYPE" = xgcc; then
#    JDK_DISABLED="-Wno-pointer-arith -Wno-undef -Wno-unused-function -Wno-unused-value -Wno-unused-but-set-variable -Wno-unused-parameter -Wno-unused-variable -Wno-unused-label"
#    JVM_DISABLED="-Wno-unknown-pragmas -Wno-comment -Wno-delete-non-virtual-dtor -Wno-ignored-qualifiers -Wno-parentheses -Wno-reorder -Wno-unused-local-typedefs -Wno-unused-parameter -Wno-unused-variable -Wno-address -Wno-missing-field-initializers -Wno-unused-but-set-variable -Wno-char-subscripts -Wno-array-bounds -Wno-narrowing -Wno-empty-body -Wno-unused-but-set-parameter"
    WARNING_CFLAGS_JDK="$WARNINGS_ENABLE_ALL $JDK_DISABLED"
    WARNING_CFLAGS_JDK_CONLY="$WARNINGS_ENABLE_ALL_CFLAGS"
    WARNING_CFLAGS_JDK_CXXONLY="$WARNINGS_ENABLE_ALL_CXXFLAGS"
    WARNING_CFLAGS_JVM="$WARNINGS_ENABLE_ALL $WARNINGS_ENABLE_ALL_CXXFLAGS $JVM_DISABLED"

  elif test "x$TOOLCHAIN_TYPE" = xclang; then
    WARNING_CFLAGS_JVM="-Wpointer-arith -Wsign-compare -Wunused-function -Wno-deprecated -Wreorder"
    if test "x$OPENJDK_TARGET_OS" = xlinux; then
      WARNING_CFLAGS_JVM="$WARNING_CFLAGS_JVM -Wno-sometimes-uninitialized"
      WARNING_CFLAGS_JDK="-Wall -Wextra -Wno-unused -Wno-unused-parameter -Wformat=2"
    fi
  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; 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$TOOLCHAIN_TYPE" = xmicrosoft; then
    WARNING_CFLAGS="$WARNINGS_ENABLE_ALL"
    #WARNING_CFLAGS="-W3"
    #WARNING_CFLAGS_JDK="-wd4800"

  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

  # Where does this really belong??
  if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
    PICFLAG="-fPIC"
  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
    PICFLAG="-KPIC"
  elif test "x$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

  # Optional POSIX functionality needed by the JVM
  #
  # Check if clock_gettime is available and in which library. This indicates
  # availability of CLOCK_MONOTONIC for hotspot. But we don't need to link, so
  # don't let it update LIBS.
  save_LIBS="$LIBS"
  AC_SEARCH_LIBS(clock_gettime, rt, [HAS_CLOCK_GETTIME=true], [])
  if test "x$LIBS" = "x-lrt "; then
    CLOCK_GETTIME_IN_LIBRT=true
  fi
  LIBS="$save_LIBS"

  if test "x$HAS_CLOCK_GETTIME" = "xtrue"; then
    OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DSUPPORTS_CLOCK_MONOTONIC"
    if test "x$CLOCK_GETTIME_IN_LIBRT" = "xtrue"; then
      OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DNEEDS_LIBRT"
    fi
  fi
])

################################################################################
# $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
    $1_DEFINES_CPU_JVM="-DVM_LITTLE_ENDIAN"
  fi
  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
    # The macro _LITTLE_ENDIAN needs to be defined the same to avoid the
    #   Sun C compiler warning message: warning: macro redefined: _LITTLE_ENDIAN
    if test "x$FLAGS_CPU_ENDIAN" = xlittle; then
      $1_DEFINES_CPU_JDK="-D_LITTLE_ENDIAN="
    else
      $1_DEFINES_CPU_JDK="-D_BIG_ENDIAN="
    fi
  else
    if test "x$FLAGS_CPU_ENDIAN" = xlittle; then
      $1_DEFINES_CPU_JDK="-D_LITTLE_ENDIAN"
    else
      $1_DEFINES_CPU_JDK="-D_BIG_ENDIAN"
    fi
  fi

  # setup CPU bit size
  $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -DARCH='\"$FLAGS_CPU_LEGACY\"' \
      -D$FLAGS_CPU_LEGACY"

  if test "x$FLAGS_CPU_BITS" = x64; then
    # -D_LP64=1 is only set on linux and mac. Setting on windows causes diff in
    # unpack200.exe.
    if test "x$FLAGS_OS" = xlinux || test "x$FLAGS_OS" = xmacosx; then
      $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_LP64=1"
    fi
    if test "x$FLAGS_OS" != xsolaris && test "x$FLAGS_OS" != xaix; then
      # Solaris does not have _LP64=1 in the old build.
      # xlc on AIX defines _LP64=1 by default and issues a warning if we redefine it.
      $1_DEFINES_CPU_JVM="${$1_DEFINES_CPU_JVM} -D_LP64=1"
    fi
  fi

  # toolchain dependend, per-cpu
  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then
    if test "x$FLAGS_CPU_ARCH" = xx86; then
      $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -DcpuIntel -Di586 -D$FLAGS_CPU_LEGACY_LIB"
    fi
  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
    if test "x$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
    if test "x$FLAGS_CPU" = xx86; then
      # Force compatibility with i586 on 32 bit intel platforms.
      $1_CFLAGS_CPU="-march=i586"
    fi
  fi

  if test "x$TOOLCHAIN_TYPE" = xgcc; then
    if test "x$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

    $1_CXXSTD_CXXFLAG="-std=gnu++98"
    FLAGS_CXX_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [${$1_CXXSTD_CXXFLAG} -Werror],
        PREFIX: $3, IF_FALSE: [$1_CXXSTD_CXXFLAG=""])
    $1_TOOLCHAIN_CFLAGS_JDK_CXXONLY="${$1_CXXSTD_CXXFLAG}"
    $1_TOOLCHAIN_CFLAGS_JVM="${$1_TOOLCHAIN_CFLAGS_JVM} ${$1_CXXSTD_CXXFLAG}"
    $2ADLC_CXXFLAG="${$1_CXXSTD_CXXFLAG}"

  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$TOOLCHAIN_TYPE" = xsolstudio; then
    if test "x$FLAGS_CPU" = xx86_64; then
      # NOTE: -xregs=no%frameptr is supposed to be default on x64
      $1_CFLAGS_CPU_JDK="-xregs=no%frameptr"
    elif test "x$FLAGS_CPU" = xsparcv9; then
      $1_CFLAGS_CPU_JVM="-xarch=sparc"
      $1_CFLAGS_CPU_JDK_LIBONLY="-xregs=no%appl"
    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"
  fi

  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=
        ]
    )
  fi

  # 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"

  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"

  # 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}"
  $2CXXFLAGS_JDKEXE="$CFLAGS_JDK_COMMON $CFLAGS_JDK_COMMON_CXXONLY ${$1_CFLAGS_JDK}"
  $2CFLAGS_JDKLIB="${$2CFLAGS_JDKEXE} $JDK_PICFLAG ${$1_CFLAGS_CPU_JDK_LIBONLY}"
  $2CXXFLAGS_JDKLIB="${$2CXXFLAGS_JDKEXE} $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_CXXFLAG)

  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.
# $2 - Prefix for compiler variables (either BUILD_ or nothing).
AC_DEFUN([FLAGS_SETUP_GCC6_COMPILER_FLAGS],
[
  # These flags are required for GCC 6 builds as undefined behaviour in OpenJDK code
  # runs afoul of the more aggressive versions of these optimisations.
  # Notably, value range propagation now assumes that the this pointer of C++
  # member functions is non-null.
  NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks"
  FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_DELETE_NULL_POINTER_CHECKS_CFLAG -Werror],
      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 -Werror],
      PREFIX: $2, IF_FALSE: [NO_LIFETIME_DSE_CFLAG=""])
  $1_GCC6_CFLAGS="${NO_DELETE_NULL_POINTER_CHECKS_CFLAG} ${NO_LIFETIME_DSE_CFLAG}"
])

# Documentation on common flags used for solstudio in HIGHEST.
#
# WARNING: Use of OPTIMIZATION_LEVEL=HIGHEST in your Makefile needs to be
#          done with care, there are some assumptions below that need to
#          be understood about the use of pointers, and IEEE behavior.
#
# -fns: Use non-standard floating point mode (not IEEE 754)
# -fsimple: Do some simplification of floating point arithmetic (not IEEE 754)
# -fsingle: Use single precision floating point with 'float'
# -xalias_level=basic: Assume memory references via basic pointer types do not alias
#   (Source with excessing pointer casting and data access with mixed
#    pointer types are not recommended)
# -xbuiltin=%all: Use intrinsic or inline versions for math/std functions
#   (If you expect perfect errno behavior, do not use this)
# -xdepend: Loop data dependency optimizations (need -xO3 or higher)
# -xrestrict: Pointer parameters to functions do not overlap
#   (Similar to -xalias_level=basic usage, but less obvious sometimes.
#    If you pass in multiple pointers to the same data, do not use this)
# -xlibmil: Inline some library routines
#   (If you expect perfect errno behavior, do not use this)
# -xlibmopt: Use optimized math routines (CURRENTLY DISABLED)
#   (If you expect perfect errno behavior, do not use this)
#  Can cause undefined external on Solaris 8 X86 on __sincos, removing for now