#

# Copyright (c) 2011, 2018, 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.

#

AC_DEFUN_ONCE([FLAGS_SETUP_INIT_FLAGS],

[

  # Option used to tell the compiler whether to create 32- or 64-bit executables

  if test "x$TOOLCHAIN_TYPE" = xxlc; then

    COMPILER_TARGET_BITS_FLAG="-q"

  else

    COMPILER_TARGET_BITS_FLAG="-m"

  fi

  AC_SUBST(COMPILER_TARGET_BITS_FLAG)

  # FIXME: figure out if we should select AR flags depending on OS or toolchain.

  if test "x$OPENJDK_TARGET_OS" = xmacosx; then

    ARFLAGS="-r"

  elif test "x$OPENJDK_TARGET_OS" = xaix; then

    ARFLAGS="-X64"

  elif test "x$OPENJDK_TARGET_OS" = xwindows; then

    # lib.exe is used as AR to create static libraries.

    ARFLAGS="-nologo -NODEFAULTLIB:MSVCRT"

  else

    ARFLAGS=""

  fi

  AC_SUBST(ARFLAGS)

  ## Setup strip.

  # FIXME: should this really be per platform, or should it be per toolchain type?

  # strip is not provided by clang or solstudio; so guessing platform makes most sense.

  # FIXME: we should really only export STRIPFLAGS from here, not POST_STRIP_CMD.

  if test "x$OPENJDK_TARGET_OS" = xlinux; then

    STRIPFLAGS="-g"

  elif test "x$OPENJDK_TARGET_OS" = xsolaris; then

    STRIPFLAGS="-x"

  elif test "x$OPENJDK_TARGET_OS" = xmacosx; then

    STRIPFLAGS="-S"

  elif test "x$OPENJDK_TARGET_OS" = xaix; then

    STRIPFLAGS="-X32_64"

  fi

  if test "x$OPENJDK_TARGET_OS" != xwindows; then

    POST_STRIP_CMD="$STRIP $STRIPFLAGS"

  fi

  AC_SUBST(POST_STRIP_CMD)

  if test "x$OPENJDK_TARGET_OS" = xsolaris; then

    # FIXME: break out into MCSFLAGS

    POST_MCS_CMD="$MCS -d -a \"JDK $FULL_VERSION\""

  fi

  AC_SUBST(POST_MCS_CMD)

  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    CC_OUT_OPTION=-Fo

    EXE_OUT_OPTION=-out:

    LD_OUT_OPTION=-out:

    AR_OUT_OPTION=-out:

  else

    # The option used to specify the target .o,.a or .so file.

    # When compiling, how to specify the to be created object file.

    CC_OUT_OPTION='-o$(SPACE)'

    # When linking, how to specify the to be created executable.

    EXE_OUT_OPTION='-o$(SPACE)'

    # When linking, how to specify the to be created dynamically linkable library.

    LD_OUT_OPTION='-o$(SPACE)'

    # When archiving, how to specify the to be create static archive for object files.

    AR_OUT_OPTION='rcs$(SPACE)'

  fi

  AC_SUBST(CC_OUT_OPTION)

  AC_SUBST(EXE_OUT_OPTION)

  AC_SUBST(LD_OUT_OPTION)

  AC_SUBST(AR_OUT_OPTION)

  # On Windows, we need to set RC flags.

  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    RC_FLAGS="-nologo -l 0x409 -r"

    if test "x$VARIANT" = xOPT; then

      RC_FLAGS="$RC_FLAGS -d NDEBUG"

    fi

    # The version variables used to create RC_FLAGS may be overridden

    # in a custom configure script, or possibly the command line.

    # Let those variables be expanded at make time in spec.gmk.

    # The \$ are escaped to the shell, and the $(...) variables

    # are evaluated by make.

    RC_FLAGS="$RC_FLAGS \

        -d \"JDK_BUILD_ID=\$(FULL_VERSION)\" \

        -d \"JDK_COMPANY=\$(COMPANY_NAME)\" \

        -d \"JDK_COMPONENT=\$(PRODUCT_NAME) \$(JDK_RC_PLATFORM_NAME) binary\" \

        -d \"JDK_VER=\$(JDK_MINOR_VERSION).\$(JDK_MICRO_VERSION).\$(COOKED_JDK_UPDATE_VERSION).\$(COOKED_BUILD_NUMBER)\" \

        -d \"JDK_COPYRIGHT=Copyright \xA9 $COPYRIGHT_YEAR\" \

        -d \"JDK_NAME=\$(PRODUCT_NAME) \$(JDK_RC_PLATFORM_NAME) \$(JDK_MINOR_VERSION) \$(JDK_UPDATE_META_TAG)\" \

        -d \"JDK_FVER=\$(JDK_MINOR_VERSION),\$(JDK_MICRO_VERSION),\$(if \$(COOKED_JDK_UPDATE_VERSION),\$(COOKED_JDK_UPDATE_VERSION),0),\$(COOKED_BUILD_NUMBER)\""

  fi

  AC_SUBST(RC_FLAGS)

  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    # FIXME: likely bug, should be CCXXFLAGS_JDK? or one for C or CXX.

    CCXXFLAGS="$CCXXFLAGS -nologo"

  fi

  if test "x$SYSROOT" != "x"; then

    if test "x$TOOLCHAIN_TYPE" = xsolstudio; then

      if test "x$OPENJDK_TARGET_OS" = xsolaris; then

        # Solaris Studio does not have a concept of sysroot. Instead we must

        # make sure the default include and lib dirs are appended to each 

        # compile and link command line.

        SYSROOT_CFLAGS="-I$SYSROOT/usr/include"

        SYSROOT_LDFLAGS="-L$SYSROOT/usr/lib$OPENJDK_TARGET_CPU_ISADIR \

            -L$SYSROOT/lib$OPENJDK_TARGET_CPU_ISADIR \

            -L$SYSROOT/usr/ccs/lib$OPENJDK_TARGET_CPU_ISADIR"

      fi

    elif test "x$TOOLCHAIN_TYPE" = xgcc; then

      SYSROOT_CFLAGS="--sysroot=\"$SYSROOT\""

      SYSROOT_LDFLAGS="--sysroot=\"$SYSROOT\""

    elif test "x$TOOLCHAIN_TYPE" = xclang; then

      SYSROOT_CFLAGS="-isysroot \"$SYSROOT\""

      SYSROOT_LDFLAGS="-isysroot \"$SYSROOT\""

    fi

    # Propagate the sysroot args to hotspot

    LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS $SYSROOT_CFLAGS"

    LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS $SYSROOT_CFLAGS"

    LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS $SYSROOT_LDFLAGS"

  fi

  AC_SUBST(SYSROOT_CFLAGS)

  AC_SUBST(SYSROOT_LDFLAGS)

])

AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_LIBS],

[

  ###############################################################################

  #

  # How to compile shared libraries.

  #

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    PICFLAG="-fPIC"

    PIEFLAG="-fPIE"

    C_FLAG_REORDER=''

    CXX_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 $PICFLAG"

      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker @loader_path/.'

      SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"

      SET_SHARED_LIBRARY_NAME='-Xlinker -install_name -Xlinker @rpath/[$]1'

      SET_SHARED_LIBRARY_MAPFILE=''

    else

      # Default works for linux, might work on other platforms as well.

      SHARED_LIBRARY_FLAGS='-shared'

      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$ORIGIN[$]1'

      SET_SHARED_LIBRARY_ORIGIN="-Xlinker -z -Xlinker origin $SET_EXECUTABLE_ORIGIN"

      SET_SHARED_LIBRARY_NAME='-Xlinker -soname=[$]1'

      SET_SHARED_LIBRARY_MAPFILE='-Xlinker -version-script=[$]1'

    fi

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    PICFLAG="-KPIC"

    PIEFLAG=""

    C_FLAG_REORDER='-xF'

    CXX_FLAG_REORDER='-xF'

    SHARED_LIBRARY_FLAGS="-G"

    SET_EXECUTABLE_ORIGIN='-R\$$$$ORIGIN[$]1'

    SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"

    SET_SHARED_LIBRARY_NAME=''

    SET_SHARED_LIBRARY_MAPFILE='-M[$]1'

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    PICFLAG="-qpic=large"

    PIEFLAG=""

    C_FLAG_REORDER=''

    CXX_FLAG_REORDER=''

    SHARED_LIBRARY_FLAGS="-qmkshrobj"

    SET_EXECUTABLE_ORIGIN=""

    SET_SHARED_LIBRARY_ORIGIN=''

    SET_SHARED_LIBRARY_NAME=''

    SET_SHARED_LIBRARY_MAPFILE=''

  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    PICFLAG=""

    PIEFLAG=""

    C_FLAG_REORDER=''

    CXX_FLAG_REORDER=''

    SHARED_LIBRARY_FLAGS="-LD"

    SET_EXECUTABLE_ORIGIN=''

    SET_SHARED_LIBRARY_ORIGIN=''

    SET_SHARED_LIBRARY_NAME=''

    SET_SHARED_LIBRARY_MAPFILE=''

  fi

  AC_SUBST(C_FLAG_REORDER)

  AC_SUBST(CXX_FLAG_REORDER)

  AC_SUBST(SHARED_LIBRARY_FLAGS)

  AC_SUBST(SET_EXECUTABLE_ORIGIN)

  AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)

  AC_SUBST(SET_SHARED_LIBRARY_NAME)

  AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)

  if test "x$OPENJDK_TARGET_OS" = xsolaris; then

    CFLAGS_JDK="${CFLAGS_JDK} -D__solaris__"

    CXXFLAGS_JDK="${CXXFLAGS_JDK} -D__solaris__"

    CFLAGS_JDKLIB_EXTRA='-xstrconst'

  fi

  # The (cross) compiler is now configured, we can now test capabilities

  # of the target platform.

])

# 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

    # FIXME: this will never happen since sparc != sparcv9, ie 32 bit, which we don't build anymore.

    # Bug?

    #if test "x$OPENJDK_TARGET_CPU" = xsparc; then

    #  CFLAGS_JDK="${CFLAGS_JDK} -xmemalign=4s"

    #  CXXFLAGS_JDK="${CXXFLAGS_JDK} -xmemalign=4s"

    #fi

AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION],

[

  ###############################################################################

  #

  # Setup the opt flags for different compilers

  # and different operating systems.

  #

  # FIXME: this was indirectly the old default, but just inherited.

  # if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

  #   C_FLAG_DEPS="-MMD -MF"

  # fi

  # Generate make dependency files

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    C_FLAG_DEPS="-MMD -MF"

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    C_FLAG_DEPS="-xMMD -xMF"

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    C_FLAG_DEPS="-qmakedep=gcc -MF"

  fi

  CXX_FLAG_DEPS="$C_FLAG_DEPS"

  AC_SUBST(C_FLAG_DEPS)

  AC_SUBST(CXX_FLAG_DEPS)

  # 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=""

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    if test "x$OPENJDK_TARGET_CPU_BITS" = "x64" && test "x$DEBUG_LEVEL" = "xfastdebug"; then

      CFLAGS_DEBUG_SYMBOLS="-g1"

      CXXFLAGS_DEBUG_SYMBOLS="-g1"

    else

      CFLAGS_DEBUG_SYMBOLS="-g"

      CXXFLAGS_DEBUG_SYMBOLS="-g"

    fi

    ASFLAGS_DEBUG_SYMBOLS="-g"

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    CFLAGS_DEBUG_SYMBOLS="-g -xs"

    CXXFLAGS_DEBUG_SYMBOLS="-g0 -xs"

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    CFLAGS_DEBUG_SYMBOLS="-g"

    CXXFLAGS_DEBUG_SYMBOLS="-g"

  fi

  AC_SUBST(ASFLAGS_DEBUG_SYMBOLS)

  AC_SUBST(CFLAGS_DEBUG_SYMBOLS)

  AC_SUBST(CXXFLAGS_DEBUG_SYMBOLS)

  # Optimization levels

  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    CC_HIGHEST="$CC_HIGHEST -fns -fsimple -fsingle -xalias_level=basic -xbuiltin=%all -xdepend -xrestrict -xlibmil"

    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86"; then

      # FIXME: seems we always set -xregs=no%frameptr; put it elsewhere more global?

      C_O_FLAG_HIGHEST="-xO4 -Wu,-O4~yz $CC_HIGHEST -xregs=no%frameptr"

      C_O_FLAG_HI="-xO4 -Wu,-O4~yz -xregs=no%frameptr"

      C_O_FLAG_NORM="-xO2 -Wu,-O2~yz -xregs=no%frameptr"

      C_O_FLAG_NONE="-xregs=no%frameptr"

      CXX_O_FLAG_HIGHEST="-xO4 -Qoption ube -O4~yz $CC_HIGHEST -xregs=no%frameptr"

      CXX_O_FLAG_HI="-xO4 -Qoption ube -O4~yz -xregs=no%frameptr"

      CXX_O_FLAG_NORM="-xO2 -Qoption ube -O2~yz -xregs=no%frameptr"

      CXX_O_FLAG_NONE="-xregs=no%frameptr"

      if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then

        C_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST -xchip=pentium"

        CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_HIGHEST -xchip=pentium"

      fi

    elif test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then

      C_O_FLAG_HIGHEST="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0 $CC_HIGHEST -xprefetch=auto,explicit -xchip=ultra"

      C_O_FLAG_HI="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0"

      C_O_FLAG_NORM="-xO2 -Wc,-Qrm-s -Wc,-Qiselect-T0"

      C_O_FLAG_NONE=""

      CXX_O_FLAG_HIGHEST="-xO4 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0 $CC_HIGHEST -xprefetch=auto,explicit -xchip=ultra"

      CXX_O_FLAG_HI="-xO4 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0"

      CXX_O_FLAG_NORM="-xO2 -Qoption cg -Qrm-s -Qoption cg -Qiselect-T0"

      CXX_O_FLAG_NONE=""

    fi

  else

    # The remaining toolchains share opt flags between CC and CXX;

    # setup for C and duplicate afterwards.

    if test "x$TOOLCHAIN_TYPE" = xgcc; 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="-Os"

        C_O_FLAG_HI="-Os"

        C_O_FLAG_NORM="-Os"

        C_O_FLAG_NONE=""

      else

        C_O_FLAG_HIGHEST="-O3"

        C_O_FLAG_HI="-O3"

        C_O_FLAG_NORM="-O2"

        C_O_FLAG_NONE="-O0"

      fi

    elif test "x$TOOLCHAIN_TYPE" = xxlc; then

      C_O_FLAG_HIGHEST="-O3"

      C_O_FLAG_HI="-O3 -qstrict"

      C_O_FLAG_NORM="-O2"

      C_O_FLAG_NONE=""

    elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

      C_O_FLAG_HIGHEST="-O2"

      C_O_FLAG_HI="-O1"

      C_O_FLAG_NORM="-O1"

      C_O_FLAG_NONE="-Od"

    fi

    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_NONE="$C_O_FLAG_NONE"

  fi

  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(CXX_O_FLAG_HIGHEST)

  AC_SUBST(CXX_O_FLAG_HI)

  AC_SUBST(CXX_O_FLAG_NORM)

  AC_SUBST(CXX_O_FLAG_NONE)

])

AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_JDK],

[

  # Special extras...

  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then

      CFLAGS_JDKLIB_EXTRA="${CFLAGS_JDKLIB_EXTRA} -xregs=no%appl"

      CXXFLAGS_JDKLIB_EXTRA="${CXXFLAGS_JDKLIB_EXTRA} -xregs=no%appl"

    fi

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    LDFLAGS_JDK="${LDFLAGS_JDK} -q64 -brtl -bnolibpath -liconv -bexpall"

    CFLAGS_JDK="${CFLAGS_JDK} -qchars=signed -q64 -qfullpath -qsaveopt"

    CXXFLAGS_JDK="${CXXFLAGS_JDK} -qchars=signed -q64 -qfullpath -qsaveopt"

  elif test "x$TOOLCHAIN_TYPE" = xgcc; then

    LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS -fstack-protector"

    LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS -fstack-protector"

    if test "x$OPENJDK_TARGET_OS" != xmacosx; then

      LDFLAGS_JDK="$LDFLAGS_JDK -Wl,-z,relro"

      LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS -Wl,-z,relro"

    fi

    $2CXXSTD_CXXFLAG="-std=gnu++98"

    FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]$2CXXSTD_CXXFLAG -Werror],

                                       [], [$2CXXSTD_CXXFLAG=""])

    $2CXXFLAGS_JDK="${$2CXXFLAGS_JDK} ${$2CXXSTD_CXXFLAG}"

    $2JVM_CFLAGS="${$2JVM_CFLAGS} ${$2CXXSTD_CXXFLAG}"

    AC_SUBST($2CXXSTD_CXXFLAG)

  fi

  #

  # NOTE: check for -mstackrealign needs to be below potential addition of -m32

  #

  if test "x$OPENJDK_TARGET_CPU" = xx86 && test "x$OPENJDK_TARGET_OS" = xmacosx -o \

                                                "x$OPENJDK_TARGET_OS" = xlinux; then

    # On 32-bit MacOSX the OS requires C-entry points to be 16 byte aligned.

    # While waiting for a better solution, the current workaround is to use -mstackrealign

    # This is also required on Linux systems which use libraries compiled with SSE instructions

    REALIGN_CFLAG="-mstackrealign"

    FLAGS_COMPILER_CHECK_ARGUMENTS([$REALIGN_CFLAG -Werror], [],

      AC_MSG_ERROR([The selected compiler $CXX does not support -mstackrealign! Try to put another compiler in the path.])

    )

    CFLAGS_JDK="${CFLAGS_JDK} ${REALIGN_CFLAG}"

    CXXFLAGS_JDK="${CXXFLAGS_JDK} ${REALIGN_CFLAG}"

    AC_SUBST([REALIGN_CFLAG])

  fi

  if test "x$CFLAGS" != "x${ADDED_CFLAGS}"; then

    AC_MSG_WARN([Ignoring CFLAGS($CFLAGS) found in environment. Use --with-extra-cflags])

  fi

  if test "x$CXXFLAGS" != "x${ADDED_CXXFLAGS}"; then

    AC_MSG_WARN([Ignoring CXXFLAGS($CXXFLAGS) found in environment. Use --with-extra-cxxflags])

  fi

  if test "x$LDFLAGS" != "x${ADDED_LDFLAGS}"; then

    AC_MSG_WARN([Ignoring LDFLAGS($LDFLAGS) found in environment. Use --with-extra-ldflags])

  fi

  if test "x$ASFLAGS" != "x"; then

    AC_MSG_WARN([Ignoring ASFLAGS($ASFLAGS) found in environment. Use --with-extra-asflags])

  fi

  AC_ARG_WITH(extra-cflags, [AS_HELP_STRING([--with-extra-cflags],

      [extra flags to be used when compiling jdk c-files])])

  AC_ARG_WITH(extra-cxxflags, [AS_HELP_STRING([--with-extra-cxxflags],

      [extra flags to be used when compiling jdk c++-files])])

  AC_ARG_WITH(extra-ldflags, [AS_HELP_STRING([--with-extra-ldflags],

      [extra flags to be used when linking jdk])])

  AC_ARG_WITH(extra-asflags, [AS_HELP_STRING([--with-extra-asflags],

      [extra flags to be passed to the assembler])])

  CFLAGS_JDK="${CFLAGS_JDK} $with_extra_cflags"

  CXXFLAGS_JDK="${CXXFLAGS_JDK} $with_extra_cxxflags"

  LDFLAGS_JDK="${LDFLAGS_JDK} $with_extra_ldflags"

  # Hotspot needs these set in their legacy form

  LEGACY_EXTRA_CFLAGS="$LEGACY_EXTRA_CFLAGS $with_extra_cflags"

  LEGACY_EXTRA_CXXFLAGS="$LEGACY_EXTRA_CXXFLAGS $with_extra_cxxflags"

  LEGACY_EXTRA_LDFLAGS="$LEGACY_EXTRA_LDFLAGS $with_extra_ldflags"

  LEGACY_EXTRA_ASFLAGS="$with_extra_asflags"

  AC_SUBST(LEGACY_EXTRA_CFLAGS)

  AC_SUBST(LEGACY_EXTRA_CXXFLAGS)

  AC_SUBST(LEGACY_EXTRA_LDFLAGS)

  AC_SUBST(LEGACY_EXTRA_ASFLAGS)

  ###############################################################################

  #

  # Now setup the CFLAGS and LDFLAGS for the JDK build.

  # Later we will also have CFLAGS and LDFLAGS for the hotspot subrepo build.

  #

  FDLIBM_CFLAGS=""

  # Setup compiler/platform specific flags to CFLAGS_JDK,

  # CXXFLAGS_JDK and CCXXFLAGS_JDK (common to C and CXX?)

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    # these options are used for both C and C++ compiles

    CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -Wall -Wno-parentheses -Wextra -Wno-unused -Wno-unused-parameter -Wformat=2 \

        -pipe -fstack-protector -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE"

    case $OPENJDK_TARGET_CPU_ARCH in

      arm )

        # on arm we don't prevent gcc to omit frame pointer but do prevent strict aliasing

        CFLAGS_JDK="${CFLAGS_JDK} -fno-strict-aliasing"

        ;;

      ppc )

        # on ppc we don't prevent gcc to omit frame pointer nor strict-aliasing

        ;;

      * )

        CCXXFLAGS_JDK="$CCXXFLAGS_JDK -fno-omit-frame-pointer"

        CFLAGS_JDK="${CFLAGS_JDK} -fno-strict-aliasing"

        ;;

    esac

    TOOLCHAIN_CHECK_COMPILER_VERSION(6, FLAGS_SETUP_GCC6_COMPILER_FLAGS)

    # Check that the compiler supports -ffp-contract=off flag

    # Set FDLIBM_CFLAGS to -ffp-contract=off if it does.

    # For GCC < 4.6, on x86, x86_64 and ppc check for

    # -mno-fused-madd and -fno-strict-aliasing. If they exist,

    # use them as a substitute for -ffp-contract=off.

    #

    # 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,

    #          -mno-fused-madd -fno-strict-aliasing for GCC < 4.6

    COMPILER_FP_CONTRACT_OFF_FLAG="-ffp-contract=off"

    FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]COMPILER_FP_CONTRACT_OFF_FLAG -Werror],

                                       [], [COMPILER_FP_CONTRACT_OFF_FLAG=""])

    if test "x$COMPILER_FP_CONTRACT_OFF_FLAG" = x; then

      if test "$OPENJDK_TARGET_CPU_ARCH" = "x86" ||

         test "$OPENJDK_TARGET_CPU_ARCH" = "x86_64" ||

         test "$OPENJDK_TARGET_CPU_ARCH" = "ppc"; then

        M_NO_FUSED_ADD_FLAG="-mno-fused-madd"

        FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]M_NO_FUSED_ADD_FLAG -Werror],

                                           [], [M_NO_FUSED_ADD_FLAG=""])

        NO_STRICT_ALIASING_FLAG="-fno-strict-aliasing"

        FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([[$]NO_STRICT_ALIASING_FLAG -Werror],

                                           [], [NO_STRICT_ALIASING_FLAG=""])

        if test "x$M_NO_FUSED_ADD_FLAG" != "x" && test "x$NO_STRICT_ALIASING_FLAG" != "x"; then

          FDLIBM_CFLAGS="$M_NO_FUSED_ADD_FLAG $NO_STRICT_ALIASING_FLAG"

        fi

      fi

    else

      FDLIBM_CFLAGS="$COMPILER_FP_CONTRACT_OFF_FLAG"

    fi

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -DTRACING -DMACRO_MEMSYS_OPS -DBREAKPTS"

    if test "x$OPENJDK_TARGET_CPU_ARCH" = xx86; then

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DcpuIntel -Di586 -D$OPENJDK_TARGET_CPU_LEGACY_LIB"

      CFLAGS_JDK="$CFLAGS_JDK -erroff=E_BAD_PRAGMA_PACK_VALUE"

    fi

    CFLAGS_JDK="$CFLAGS_JDK -xc99=%none -xCC -errshort=tags -Xa -v -mt -W0,-noglobal"

    CXXFLAGS_JDK="$CXXFLAGS_JDK -errtags=yes +w -mt -features=no%except -DCC_NOEX -norunpath -xnolib"

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    CFLAGS_JDK="$CFLAGS_JDK -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"

    CXXFLAGS_JDK="$CXXFLAGS_JDK -D_GNU_SOURCE -D_REENTRANT -D_LARGEFILE64_SOURCE -DSTDC"

  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK \

        -Zi -MD -Zc:wchar_t- -W3 -wd4800 \

        -DWIN32_LEAN_AND_MEAN \

        -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE \

        -DWIN32 -DIAL"

    if test "x$OPENJDK_TARGET_CPU" = xx86_64; then

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_AMD64_ -Damd64"

    else

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_X86_ -Dx86"

    fi

    # If building with Visual Studio 2010, we can still use _STATIC_CPPLIB to

    # avoid bundling msvcpNNN.dll. Doesn't work with newer versions of visual

    # studio.

    if test "x$TOOLCHAIN_VERSION" = "x2010"; then

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK \

          -D_STATIC_CPPLIB -D_DISABLE_DEPRECATE_STATIC_CPPLIB"

    fi

  fi

  AC_SUBST(FDLIBM_CFLAGS)

  ###############################################################################

  # Adjust flags according to debug level.

  case $DEBUG_LEVEL in

    fastdebug )

      CFLAGS_JDK="$CFLAGS_JDK $CFLAGS_DEBUG_SYMBOLS"

      CXXFLAGS_JDK="$CXXFLAGS_JDK $CXXFLAGS_DEBUG_SYMBOLS"

      C_O_FLAG_HI="$C_O_FLAG_NORM"

      C_O_FLAG_NORM="$C_O_FLAG_NORM"

      CXX_O_FLAG_HI="$CXX_O_FLAG_NORM"

      CXX_O_FLAG_NORM="$CXX_O_FLAG_NORM"

      JAVAC_FLAGS="$JAVAC_FLAGS -g"

      ;;

    slowdebug )

      CFLAGS_JDK="$CFLAGS_JDK $CFLAGS_DEBUG_SYMBOLS"

      CXXFLAGS_JDK="$CXXFLAGS_JDK $CXXFLAGS_DEBUG_SYMBOLS"

      C_O_FLAG_HI="$C_O_FLAG_NONE"

      C_O_FLAG_NORM="$C_O_FLAG_NONE"

      CXX_O_FLAG_HI="$CXX_O_FLAG_NONE"

      CXX_O_FLAG_NORM="$CXX_O_FLAG_NONE"

      JAVAC_FLAGS="$JAVAC_FLAGS -g"

      ;;

  esac

  # Setup LP64

  CCXXFLAGS_JDK="$CCXXFLAGS_JDK $ADD_LP64"

  # Set some common defines. These works for all compilers, but assume

  # -D is universally accepted.

  # Setup endianness

  if test "x$OPENJDK_TARGET_CPU_ENDIAN" = xlittle; then

    # The macro _LITTLE_ENDIAN needs to be defined the same to avoid the

    #   Sun C compiler warning message: warning: macro redefined: _LITTLE_ENDIAN

    #   (The Solaris X86 system defines this in file /usr/include/sys/isa_defs.h).

    #   Note: -Dmacro         is the same as    #define macro 1

    #         -Dmacro=        is the same as    #define macro

    if test "x$OPENJDK_TARGET_OS" = xsolaris; then

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_LITTLE_ENDIAN="

    else

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_LITTLE_ENDIAN"

    fi

  else

    # Same goes for _BIG_ENDIAN. Do we really need to set *ENDIAN on Solaris if they

    # are defined in the system?

    if test "x$OPENJDK_TARGET_OS" = xsolaris; then

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_BIG_ENDIAN="

    else

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_BIG_ENDIAN"

    fi

  fi

  if test "x$OPENJDK_TARGET_CPU" = xppc64le; then

    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DABI_ELFv2"

  fi

  # Setup target OS define. Use OS target name but in upper case.

  OPENJDK_TARGET_OS_UPPERCASE=`$ECHO $OPENJDK_TARGET_OS | $TR 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`

  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D$OPENJDK_TARGET_OS_UPPERCASE"

  # Setup target CPU

  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DARCH='\"$OPENJDK_TARGET_CPU_LEGACY\"' -D$OPENJDK_TARGET_CPU_LEGACY"

  # Setup debug/release defines

  if test "x$DEBUG_LEVEL" = xrelease; then

    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DNDEBUG"

    if test "x$OPENJDK_TARGET_OS" = xsolaris; then

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DTRIMMED"

    fi

  else

    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DDEBUG"

  fi

  # Setup release name

  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DRELEASE='\"\$(RELEASE)\"'"

  # Set some additional per-OS defines.

  if test "x$OPENJDK_TARGET_OS" = xmacosx; then

    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_ALLBSD_SOURCE -D_DARWIN_UNLIMITED_SELECT"

  elif test "x$OPENJDK_TARGET_OS" = xaix; then

    # FIXME: PPC64 should not be here.

    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DPPC64"

  elif test "x$OPENJDK_TARGET_OS" = xbsd; then

    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_ALLBSD_SOURCE"

  fi

  # Additional macosx handling

  if test "x$OPENJDK_TARGET_OS" = xmacosx; then

    if test "x$TOOLCHAIN_TYPE" = xgcc; then

      # FIXME: This needs to be exported in spec.gmk due to closed legacy code.

      # FIXME: clean this up, and/or move it elsewhere.

      # Setting these parameters makes it an error to link to macosx APIs that are

      # newer than the given OS version and makes the linked binaries compatible 

      # even if built on a newer version of the OS.

      # The expected format is X.Y.Z

      MACOSX_VERSION_MIN=10.7.0

      AC_SUBST(MACOSX_VERSION_MIN)

      # The macro takes the version with no dots, ex: 1070

      # Let the flags variables get resolved in make for easier override on make

      # command line.

      CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DMAC_OS_X_VERSION_MAX_ALLOWED=\$(subst .,,\$(MACOSX_VERSION_MIN)) -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"

      LDFLAGS_JDK="$LDFLAGS_JDK -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"

    fi

  fi

  # Setup some hard coded includes

  CCXXFLAGS_JDK="$CCXXFLAGS_JDK \

      -I${JDK_OUTPUTDIR}/include \

      -I${JDK_OUTPUTDIR}/include/$OPENJDK_TARGET_OS \

      -I${JDK_TOPDIR}/src/share/javavm/export \

      -I${JDK_TOPDIR}/src/$OPENJDK_TARGET_OS_EXPORT_DIR/javavm/export \

      -I${JDK_TOPDIR}/src/share/native/common \

      -I${JDK_TOPDIR}/src/$OPENJDK_TARGET_OS_API_DIR/native/common"

  # The shared libraries are compiled using the picflag.

  CFLAGS_JDKLIB="$CCXXFLAGS_JDK $CFLAGS_JDK $PICFLAG $CFLAGS_JDKLIB_EXTRA"

  CXXFLAGS_JDKLIB="$CCXXFLAGS_JDK $CXXFLAGS_JDK $PICFLAG $CXXFLAGS_JDKLIB_EXTRA "

  # Executable flags

  CFLAGS_JDKEXE="$CCXXFLAGS_JDK $CFLAGS_JDK $PIEFLAG"

  CXXFLAGS_JDKEXE="$CCXXFLAGS_JDK $CXXFLAGS_JDK $PIEFLAG"

  AC_SUBST(CFLAGS_JDKLIB)

  AC_SUBST(CFLAGS_JDKEXE)

  AC_SUBST(CXXFLAGS_JDKLIB)

  AC_SUBST(CXXFLAGS_JDKEXE)

  # Setup LDFLAGS et al.

  #

  # Now this is odd. The JDK native libraries have to link against libjvm.so

  # On 32-bit machines there is normally two distinct libjvm.so:s, client and server.

  # Which should we link to? Are we lucky enough that the binary api to the libjvm.so library

  # is identical for client and server? Yes. Which is picked at runtime (client or server)?

  # Neither, since the chosen libjvm.so has already been loaded by the launcher, all the following

  # libraries will link to whatever is in memory. Yuck.

  #

  # Thus we offer the compiler to find libjvm.so first in server then in client. It works. Ugh.

  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    LDFLAGS_JDK="$LDFLAGS_JDK -nologo -opt:ref -incremental:no"

    if test "x$OPENJDK_TARGET_CPU_BITS" = "x32"; then

      LDFLAGS_JDK="$LDFLAGS_JDK -safeseh"

    fi

    # TODO: make -debug optional "--disable-full-debug-symbols"

    LDFLAGS_JDK="$LDFLAGS_JDK -debug"

    LDFLAGS_JDKLIB="${LDFLAGS_JDK} -dll -libpath:${JDK_OUTPUTDIR}/lib"

    LDFLAGS_JDKLIB_SUFFIX=""

    if test "x$OPENJDK_TARGET_CPU_BITS" = "x64"; then

      LDFLAGS_STACK_SIZE=1048576

    else

      LDFLAGS_STACK_SIZE=327680

    fi

    LDFLAGS_JDKEXE="${LDFLAGS_JDK} /STACK:$LDFLAGS_STACK_SIZE"

  else

    if test "x$TOOLCHAIN_TYPE" = xgcc; then

      # If this is a --hash-style=gnu system, use --hash-style=both, why?

      # We have previously set HAS_GNU_HASH if this is the case

      if test -n "$HAS_GNU_HASH"; then

        LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker --hash-style=both "

      fi

      if test "x$OPENJDK_TARGET_OS" = xlinux; then

        # And since we now know that the linker is gnu, then add:

        #   -z defs, to forbid undefined symbols in object files

        #   -z noexecstack, to mark stack regions as non-executable

        LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker -z -Xlinker defs -Xlinker -z -Xlinker noexecstack"

        if test "x$DEBUG_LEVEL" = "xrelease"; then

          # When building release libraries, tell the linker optimize them.

          # Should this be supplied to the OSS linker as well?

          LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker -O1"

        fi

      fi

    fi

    if test "x$TOOLCHAIN_TYPE" = xsolstudio; then

      LDFLAGS_JDK="$LDFLAGS_JDK -z defs -xildoff -ztext"

      LDFLAGS_CXX_JDK="$LDFLAGS_CXX_JDK -norunpath -xnolib"

    fi

    LDFLAGS_JDKLIB="${LDFLAGS_JDK} $SHARED_LIBRARY_FLAGS \

        -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}"

    # On some platforms (mac) the linker warns about non existing -L dirs.

    # Add server first if available. Linking aginst client does not always produce the same results.

    # Only add client dir if client is being built. Add minimal (note not minimal1) if only building minimal1.

    # Default to server for other variants.

    if test "x$JVM_VARIANT_SERVER" = xtrue; then

      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/server"

    elif test "x$JVM_VARIANT_CLIENT" = xtrue; then

      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/client"

    elif test "x$JVM_VARIANT_MINIMAL1" = xtrue; then

      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/minimal"

    else

      LDFLAGS_JDKLIB="${LDFLAGS_JDKLIB} -L${JDK_OUTPUTDIR}/lib${OPENJDK_TARGET_CPU_LIBDIR}/server"

    fi

    LDFLAGS_JDKLIB_SUFFIX="-ljava -ljvm"

    if test "x$TOOLCHAIN_TYPE" = xsolstudio; then

      LDFLAGS_JDKLIB_SUFFIX="$LDFLAGS_JDKLIB_SUFFIX -lc"

    fi

    LDFLAGS_JDKEXE="${LDFLAGS_JDK}"

    if test "x$OPENJDK_TARGET_OS" = xlinux; then

      LDFLAGS_JDKEXE="$LDFLAGS_JDKEXE -Xlinker --allow-shlib-undefined"

    fi

    if test "x$TOOLCHAIN_TYPE" = xgcc; then

      # Enabling pie on 32 bit builds prevents the JVM from allocating a continuous

      # java heap.

      if test "x$OPENJDK_TARGET_CPU_BITS" != "x32"; then

        LDFLAGS_JDKEXE="$LDFLAGS_JDKEXE -pie"

      fi

    fi

  fi

  AC_SUBST(LDFLAGS_JDKLIB)

  AC_SUBST(LDFLAGS_JDKEXE)

  AC_SUBST(LDFLAGS_JDKLIB_SUFFIX)

  AC_SUBST(LDFLAGS_JDKEXE_SUFFIX)

  AC_SUBST(LDFLAGS_CXX_JDK)

])

# FLAGS_C_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],

#                                  [RUN-IF-FALSE])

# ------------------------------------------------------------

# Check that the C compiler supports an argument

AC_DEFUN([FLAGS_C_COMPILER_CHECK_ARGUMENTS],

[

  AC_MSG_CHECKING([if the C compiler supports "$1"])

  supports=yes

  saved_cflags="$CFLAGS"

  CFLAGS="$CFLAGS $1"

  AC_LANG_PUSH([C])

  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [], 

      [supports=no])

  AC_LANG_POP([C])

  CFLAGS="$saved_cflags"

  AC_MSG_RESULT([$supports])

  if test "x$supports" = "xyes" ; then

    m4_ifval([$2], [$2], [:])

  else

    m4_ifval([$3], [$3], [:])

  fi

])

# FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],

#                                    [RUN-IF-FALSE])

# ------------------------------------------------------------

# Check that the C++ compiler supports an argument

AC_DEFUN([FLAGS_CXX_COMPILER_CHECK_ARGUMENTS],

[

  AC_MSG_CHECKING([if the C++ compiler supports "$1"])

  supports=yes

  saved_cxxflags="$CXXFLAGS"

  CXXFLAGS="$CXXFLAG $1"

  AC_LANG_PUSH([C++])

  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int i;]])], [], 

      [supports=no])

  AC_LANG_POP([C++])

  CXXFLAGS="$saved_cxxflags"

  AC_MSG_RESULT([$supports])

  if test "x$supports" = "xyes" ; then

    m4_ifval([$2], [$2], [:])

  else

    m4_ifval([$3], [$3], [:])

  fi

])

# FLAGS_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],

#                                [RUN-IF-FALSE])

# ------------------------------------------------------------

# Check that the C and C++ compilers support an argument

AC_DEFUN([FLAGS_COMPILER_CHECK_ARGUMENTS],

[

  FLAGS_C_COMPILER_CHECK_ARGUMENTS([$1],

                       [C_COMP_SUPPORTS="yes"],

                       [C_COMP_SUPPORTS="no"])

  FLAGS_CXX_COMPILER_CHECK_ARGUMENTS([$1],

                     [CXX_COMP_SUPPORTS="yes"],

                     [CXX_COMP_SUPPORTS="no"])

  AC_MSG_CHECKING([if both compilers support "$1"])

  supports=no

  if test "x$C_COMP_SUPPORTS" = "xyes" -a "x$CXX_COMP_SUPPORTS" = "xyes"; then supports=yes; fi

  AC_MSG_RESULT([$supports])

  if test "x$supports" = "xyes" ; then

    m4_ifval([$2], [$2], [:])

  else

    m4_ifval([$3], [$3], [:])

  fi

])

AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_MISC],

[

  # Some Zero and Shark settings.

  # ZERO_ARCHFLAG tells the compiler which mode to build for

  case "${OPENJDK_TARGET_CPU}" in

    s390)

      ZERO_ARCHFLAG="${COMPILER_TARGET_BITS_FLAG}31"

      ;;

    *)

      ZERO_ARCHFLAG="${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}"

  esac

  FLAGS_COMPILER_CHECK_ARGUMENTS([$ZERO_ARCHFLAG], [], [ZERO_ARCHFLAG=""])

  AC_SUBST(ZERO_ARCHFLAG)

  # Check that the compiler supports -mX (or -qX on AIX) flags

  # Set COMPILER_SUPPORTS_TARGET_BITS_FLAG to 'true' if it does

  FLAGS_COMPILER_CHECK_ARGUMENTS([${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}],

      [COMPILER_SUPPORTS_TARGET_BITS_FLAG=true],

      [COMPILER_SUPPORTS_TARGET_BITS_FLAG=false])

  AC_SUBST(COMPILER_SUPPORTS_TARGET_BITS_FLAG)

])

AC_DEFUN_ONCE([FLAGS_SETUP_GCC6_COMPILER_FLAGS],