toolchain.m4

#
# Copyright (c) 2011, 2012, 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.
#

# $1 = compiler to test (CC or CXX)
# $2 = human readable name of compiler (C or C++)
AC_DEFUN([TOOLCHAIN_CHECK_COMPILER_VERSION],
[
  COMPILER=[$]$1
  COMPILER_NAME=$2

  if test "x$OPENJDK_TARGET_OS" = xsolaris; then
    # Make sure we use the Sun Studio compiler and not gcc on Solaris, which won't work
    COMPILER_VERSION_TEST=`$COMPILER -V 2>&1 | $HEAD -n 1`
    $ECHO $COMPILER_VERSION_TEST | $GREP "^.*: Sun $COMPILER_NAME" > /dev/null
    if test $? -ne 0; then
      GCC_VERSION_TEST=`$COMPILER --version 2>&1 | $HEAD -n 1`

      AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required Sun Studio compiler.])
      AC_MSG_NOTICE([The result from running with -V was: "$COMPILER_VERSION_TEST" and with --version: "$GCC_VERSION_TEST"])
      AC_MSG_ERROR([Sun Studio compiler is required. Try setting --with-tools-dir.])
    else
      COMPILER_VERSION=`$ECHO $COMPILER_VERSION_TEST | $SED -n "s/^.*@<:@ ,\t@:>@$COMPILER_NAME@<:@ ,\t@:>@\(@<:@1-9@:>@\.@<:@0-9@:>@@<:@0-9@:>@*\).*/\1/p"`
      COMPILER_VENDOR="Sun Studio"
    fi
  elif test  "x$OPENJDK_TARGET_OS" = xwindows; then
    # First line typically looks something like:
    # Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.40219.01 for 80x86
    COMPILER_VERSION_TEST=`$COMPILER 2>&1 | $HEAD -n 1 | $TR -d '\r'`
    COMPILER_VERSION=`$ECHO $COMPILER_VERSION_TEST | $SED -n "s/^.*Version \(@<:@1-9@:>@@<:@0-9.@:>@*\) .*/\1/p"`
    COMPILER_VENDOR="Microsoft CL.EXE"
    COMPILER_CPU_TEST=`$ECHO $COMPILER_VERSION_TEST | $SED -n "s/^.* for \(.*\)$/\1/p"`
    if test "x$OPENJDK_TARGET_CPU" = "xx86"; then
      if test "x$COMPILER_CPU_TEST" != "x80x86"; then
        AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "80x86".])
      fi
    elif test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
      if test "x$COMPILER_CPU_TEST" != "xx64"; then
        AC_MSG_ERROR([Target CPU mismatch. We are building for $OPENJDK_TARGET_CPU but CL is for "$COMPILER_CPU_TEST"; expected "x64".])
      fi
    fi
  else
    COMPILER_VERSION_TEST=`$COMPILER --version 2>&1 | $HEAD -n 1`
    # Check that this is likely to be GCC.
    $COMPILER --version 2>&1 | $GREP "Free Software Foundation" > /dev/null
    if test $? -ne 0; then
      AC_MSG_NOTICE([The $COMPILER_NAME compiler (located as $COMPILER) does not seem to be the required GCC compiler.])
      AC_MSG_NOTICE([The result from running with --version was: "$COMPILER_VERSION_TEST"])
      AC_MSG_ERROR([GCC compiler is required. Try setting --with-tools-dir.])
    fi

    # First line typically looks something like:
    # gcc (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2
    COMPILER_VERSION=`$ECHO $COMPILER_VERSION_TEST | $SED -n "s/^.* \(@<:@1-9@:>@@<:@0-9.@:>@*\)/\1/p"`
    COMPILER_VENDOR=`$ECHO $COMPILER_VERSION_TEST | $SED -n "s/^\(.*\) @<:@1-9@:>@@<:@0-9.@:>@*/\1/p"`
  fi
  # This sets CC_VERSION or CXX_VERSION. (This comment is a grep marker)
  $1_VERSION="$COMPILER_VERSION"
  # This sets CC_VENDOR or CXX_VENDOR. (This comment is a grep marker)
  $1_VENDOR="$COMPILER_VENDOR"

  AC_MSG_NOTICE([Using $COMPILER_VENDOR $COMPILER_NAME compiler version $COMPILER_VERSION (located at $COMPILER)])
])


AC_DEFUN_ONCE([TOOLCHAIN_SETUP_SYSROOT_AND_OUT_OPTIONS],
[
###############################################################################
#
# Configure the development tool paths and potential sysroot.
#
AC_LANG(C++)

# 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)'
AC_SUBST(CC_OUT_OPTION)
AC_SUBST(EXE_OUT_OPTION)
AC_SUBST(LD_OUT_OPTION)
AC_SUBST(AR_OUT_OPTION)
])

# $1 = compiler to test (CC or CXX)
# $2 = human readable name of compiler (C or C++)
# $3 = list of compiler names to search for
AC_DEFUN([TOOLCHAIN_FIND_COMPILER],
[
  COMPILER_NAME=$2

  $1=
  # If TOOLS_DIR is set, check for all compiler names in there first
  # before checking the rest of the PATH.
  if test -n "$TOOLS_DIR"; then
    PATH_save="$PATH"
    PATH="$TOOLS_DIR"
    AC_PATH_PROGS(TOOLS_DIR_$1, $3)
    $1=$TOOLS_DIR_$1
    PATH="$PATH_save"
  fi

  # AC_PATH_PROGS can't be run multiple times with the same variable,
  # so create a new name for this run.
  if test "x[$]$1" = x; then
    AC_PATH_PROGS(POTENTIAL_$1, $3)
    $1=$POTENTIAL_$1
  fi

  if test "x[$]$1" = x; then
      HELP_MSG_MISSING_DEPENDENCY([devkit])
      AC_MSG_ERROR([Could not find a $COMPILER_NAME compiler. $HELP_MSG])
  fi
  BASIC_FIXUP_EXECUTABLE($1)
  AC_MSG_CHECKING([resolved symbolic links for $1])
  TEST_COMPILER="[$]$1"
  BASIC_REMOVE_SYMBOLIC_LINKS(TEST_COMPILER)
  AC_MSG_RESULT([$TEST_COMPILER])
  AC_MSG_CHECKING([if $1 is disguised ccache])

  COMPILER_BASENAME=`$BASENAME "$TEST_COMPILER"`
  if test "x$COMPILER_BASENAME" = "xccache"; then
    AC_MSG_RESULT([yes, trying to find proper $COMPILER_NAME compiler])
    # We /usr/lib/ccache in the path, so cc is a symlink to /usr/bin/ccache.
    # We want to control ccache invocation ourselves, so ignore this cc and try
    # searching again.

    # Remove the path to the fake ccache cc from the PATH
    RETRY_COMPILER_SAVED_PATH="$PATH"
    COMPILER_DIRNAME=`$DIRNAME [$]$1`
    PATH="`$ECHO $PATH | $SED -e "s,$COMPILER_DIRNAME,,g" -e "s,::,:,g" -e "s,^:,,g"`"

    # Try again looking for our compiler
    AC_CHECK_TOOLS(PROPER_COMPILER_$1, $3)
    BASIC_FIXUP_EXECUTABLE(PROPER_COMPILER_$1)
    PATH="$RETRY_COMPILER_SAVED_PATH"

    AC_MSG_CHECKING([for resolved symbolic links for $1])
    BASIC_REMOVE_SYMBOLIC_LINKS(PROPER_COMPILER_$1)
    AC_MSG_RESULT([$PROPER_COMPILER_$1])
    $1="$PROPER_COMPILER_$1"
  else
    AC_MSG_RESULT([no, keeping $1])
    $1="$TEST_COMPILER"
  fi
  TOOLCHAIN_CHECK_COMPILER_VERSION([$1], [$COMPILER_NAME])
])


AC_DEFUN([TOOLCHAIN_SETUP_PATHS],
[
if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
  TOOLCHAIN_SETUP_VISUAL_STUDIO_ENV
  BASIC_DEPRECATED_ARG_WITH([dxsdk])
  BASIC_DEPRECATED_ARG_WITH([dxsdk-lib])
  BASIC_DEPRECATED_ARG_WITH([dxsdk-include])
fi

AC_SUBST(MSVCR_DLL)

# If --build AND --host is set, then the configure script will find any
# cross compilation tools in the PATH. Cross compilation tools
# follows the cross compilation standard where they are prefixed with ${host}.
# For example the binary i686-sun-solaris2.10-gcc
# will cross compile for i686-sun-solaris2.10
# If neither of build and host is not set, then build=host and the
# default compiler found in the path will be used.
# Setting only --host, does not seem to be really supported.
# Please set both --build and --host if you want to cross compile.

if test "x$COMPILE_TYPE" = "xcross"; then
    # Now we to find a C/C++ compiler that can build executables for the build
    # platform. We can't use the AC_PROG_CC macro, since it can only be used
    # once. Also, we need to do this before adding a tools dir to the path,
    # otherwise we might pick up cross-compilers which don't use standard naming.
    # Otherwise, we'll set the BUILD_tools to the native tools, but that'll have
    # to wait until they are properly discovered.
    AC_PATH_PROGS(BUILD_CC, [cl cc gcc])
    BASIC_FIXUP_EXECUTABLE(BUILD_CC)
    AC_PATH_PROGS(BUILD_CXX, [cl CC g++])
    BASIC_FIXUP_EXECUTABLE(BUILD_CXX)
    AC_PATH_PROG(BUILD_LD, ld)
    BASIC_FIXUP_EXECUTABLE(BUILD_LD)
fi
AC_SUBST(BUILD_CC)
AC_SUBST(BUILD_CXX)
AC_SUBST(BUILD_LD)

# If a devkit is found on the builddeps server, then prepend its path to the
# PATH variable. If there are cross compilers available in the devkit, these
# will be found by AC_PROG_CC et al.
DEVKIT=
BDEPS_CHECK_MODULE(DEVKIT, devkit, xxx,
                    [# Found devkit
                     PATH="$DEVKIT/bin:$PATH"
                     SYS_ROOT="$DEVKIT/${rewritten_target}/sys-root"
                     if test "x$x_includes" = "xNONE"; then
                         x_includes="$SYS_ROOT/usr/include/X11"
                     fi
                     if test "x$x_libraries" = "xNONE"; then
                         x_libraries="$SYS_ROOT/usr/lib"
                     fi
                    ],
                    [])

# Store the CFLAGS etal passed to the configure script.
ORG_CFLAGS="$CFLAGS"
ORG_CXXFLAGS="$CXXFLAGS"
ORG_OBJCFLAGS="$OBJCFLAGS"

# autoconf magic only relies on PATH, so update it if tools dir is specified
OLD_PATH="$PATH"
if test "x$TOOLS_DIR" != x; then
  PATH=$TOOLS_DIR:$PATH
fi


### Locate C compiler (CC)

# On windows, only cl.exe is supported.
# On Solaris, cc is preferred to gcc.
# Elsewhere, gcc is preferred to cc.

if test "x$CC" != x; then
  COMPILER_CHECK_LIST="$CC"
elif test "x$OPENJDK_TARGET_OS" = "xwindows"; then
  COMPILER_CHECK_LIST="cl"
elif test "x$OPENJDK_TARGET_OS" = "xsolaris"; then
  COMPILER_CHECK_LIST="cc gcc"
else
  COMPILER_CHECK_LIST="gcc cc"
fi

TOOLCHAIN_FIND_COMPILER([CC],[C],[$COMPILER_CHECK_LIST])
# Now that we have resolved CC ourself, let autoconf have its go at it
AC_PROG_CC([$CC])

### Locate C++ compiler (CXX)

if test "x$CXX" != x; then
  COMPILER_CHECK_LIST="$CXX"
elif test "x$OPENJDK_TARGET_OS" = "xwindows"; then
  COMPILER_CHECK_LIST="cl"
elif test "x$OPENJDK_TARGET_OS" = "xsolaris"; then
  COMPILER_CHECK_LIST="CC g++"
else
  COMPILER_CHECK_LIST="g++ CC"
fi

TOOLCHAIN_FIND_COMPILER([CXX],[C++],[$COMPILER_CHECK_LIST])
# Now that we have resolved CXX ourself, let autoconf have its go at it
AC_PROG_CXX([$CXX])

### Locate other tools

if test "x$OPENJDK_TARGET_OS" = xmacosx; then
    AC_PROG_OBJC
    BASIC_FIXUP_EXECUTABLE(OBJC)
else
    OBJC=
fi

# Restore the flags to the user specified values.
# This is necessary since AC_PROG_CC defaults CFLAGS to "-g -O2"
CFLAGS="$ORG_CFLAGS"
CXXFLAGS="$ORG_CXXFLAGS"
OBJCFLAGS="$ORG_OBJCFLAGS"

LD="$CC"
LDEXE="$CC"
LDCXX="$CXX"
LDEXECXX="$CXX"
AC_SUBST(LD)
# LDEXE is the linker to use, when creating executables.
AC_SUBST(LDEXE)
# Linking C++ libraries.
AC_SUBST(LDCXX)
# Linking C++ executables.
AC_SUBST(LDEXECXX)

if test "x$OPENJDK_TARGET_OS" != xwindows; then
    AC_CHECK_TOOL(AR, ar)
    BASIC_FIXUP_EXECUTABLE(AR)
fi
if test "x$OPENJDK_TARGET_OS" = xmacosx; then
    ARFLAGS="-r"
else
    ARFLAGS=""
fi
AC_SUBST(ARFLAGS)

# For hotspot, we need these in Windows mixed path; other platforms keep them the same
HOTSPOT_CXX="$CXX"
HOTSPOT_LD="$LD"
AC_SUBST(HOTSPOT_CXX)
AC_SUBST(HOTSPOT_LD)

COMPILER_NAME=gcc
COMPILER_TYPE=CC
AS_IF([test "x$OPENJDK_TARGET_OS" = xwindows], [
    # For now, assume that we are always compiling using cl.exe.
    CC_OUT_OPTION=-Fo
    EXE_OUT_OPTION=-out:
    LD_OUT_OPTION=-out:
    AR_OUT_OPTION=-out:
    # On Windows, reject /usr/bin/link (as determined in CYGWIN_LINK), which is a cygwin
    # program for something completely different.
    AC_CHECK_PROG([WINLD], [link],[link],,, [$CYGWIN_LINK])
    # Since we must ignore the first found link, WINLD will contain
    # the full path to the link.exe program.
    BASIC_FIXUP_EXECUTABLE(WINLD)
    printf "Windows linker was found at $WINLD\n"
    AC_MSG_CHECKING([if the found link.exe is actually the Visual Studio linker])
    "$WINLD" --version > /dev/null
    if test $? -eq 0 ; then
      AC_MSG_RESULT([no])
      AC_MSG_ERROR([This is the Cygwin link tool. Please check your PATH and rerun configure.])
    else
      AC_MSG_RESULT([yes])
    fi
    LD="$WINLD"
    LDEXE="$WINLD"
    LDCXX="$WINLD"
    LDEXECXX="$WINLD"

    AC_CHECK_PROG([MT], [mt], [mt],,, [/usr/bin/mt])
    BASIC_FIXUP_EXECUTABLE(MT)
    # The resource compiler
    AC_CHECK_PROG([RC], [rc], [rc],,, [/usr/bin/rc])
    BASIC_FIXUP_EXECUTABLE(RC)

    # For hotspot, we need these in Windows mixed path,
    # so rewrite them all. Need added .exe suffix.
    HOTSPOT_CXX="$CXX.exe"
    HOTSPOT_LD="$LD.exe"
    HOTSPOT_MT="$MT.exe"
    HOTSPOT_RC="$RC.exe"
    BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH(HOTSPOT_CXX)
    BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH(HOTSPOT_LD)
    BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH(HOTSPOT_MT)
    BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH(HOTSPOT_RC)
    AC_SUBST(HOTSPOT_MT)
    AC_SUBST(HOTSPOT_RC)

    RC_FLAGS="-nologo -l 0x409 -r"
    AS_IF([test "x$VARIANT" = xOPT], [
        RC_FLAGS="$RC_FLAGS -d NDEBUG"
    ])

    # 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).\$(if \$(JDK_UPDATE_VERSION),\$(JDK_UPDATE_VERSION),0).\$(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 \$(JDK_UPDATE_VERSION),\$(JDK_UPDATE_VERSION),0),\$(COOKED_BUILD_NUMBER)\""

    # lib.exe is used to create static libraries.
    AC_CHECK_PROG([WINAR], [lib],[lib],,,)
    BASIC_FIXUP_EXECUTABLE(WINAR)
    AR="$WINAR"
    ARFLAGS="-nologo -NODEFAULTLIB:MSVCRT"

    AC_CHECK_PROG([DUMPBIN], [dumpbin], [dumpbin],,,)
    BASIC_FIXUP_EXECUTABLE(DUMPBIN)

    COMPILER_TYPE=CL
    CCXXFLAGS="$CCXXFLAGS -nologo"
])
AC_SUBST(RC_FLAGS)
AC_SUBST(COMPILER_TYPE)

AC_PROG_CPP
BASIC_FIXUP_EXECUTABLE(CPP)

AC_PROG_CXXCPP
BASIC_FIXUP_EXECUTABLE(CXXCPP)

if test "x$COMPILE_TYPE" != "xcross"; then
    # If we are not cross compiling, use the same compilers for
    # building the build platform executables. The cross-compilation
    # case needed to be done earlier, but this can only be done after
    # the native tools have been localized.
    BUILD_CC="$CC"
    BUILD_CXX="$CXX"
    BUILD_LD="$LD"
fi

# for solaris we really need solaris tools, and not gnu equivalent
#   these seems to normally reside in /usr/ccs/bin so add that to path before
#   starting to probe
#
#   NOTE: I add this /usr/ccs/bin after TOOLS but before OLD_PATH
#         so that it can be overriden --with-tools-dir
if test "x$OPENJDK_BUILD_OS" = xsolaris; then
    PATH="${TOOLS_DIR}:/usr/ccs/bin:${OLD_PATH}"
fi

# Find the right assembler.
if test "x$OPENJDK_TARGET_OS" = xsolaris; then
    AC_PATH_PROG(AS, as)
    BASIC_FIXUP_EXECUTABLE(AS)
else
    AS="$CC -c"
fi
AC_SUBST(AS)

if test "x$OPENJDK_TARGET_OS" = xsolaris; then
    AC_PATH_PROG(NM, nm)
    BASIC_FIXUP_EXECUTABLE(NM)
    AC_PATH_PROG(GNM, gnm)
    BASIC_FIXUP_EXECUTABLE(GNM)
    AC_PATH_PROG(STRIP, strip)
    BASIC_FIXUP_EXECUTABLE(STRIP)
    AC_PATH_PROG(MCS, mcs)
    BASIC_FIXUP_EXECUTABLE(MCS)
elif test "x$OPENJDK_TARGET_OS" != xwindows; then
    AC_CHECK_TOOL(NM, nm)
    BASIC_FIXUP_EXECUTABLE(NM)
    GNM="$NM"
    AC_SUBST(GNM)
    AC_CHECK_TOOL(STRIP, strip)
    BASIC_FIXUP_EXECUTABLE(STRIP)
fi

# objcopy is used for moving debug symbols to separate files when
# full debug symbols are enabled.
if test "x$OPENJDK_TARGET_OS" = xsolaris || test "x$OPENJDK_TARGET_OS" = xlinux; then
    AC_CHECK_TOOLS(OBJCOPY, [gobjcopy objcopy])
    # Only call fixup if objcopy was found.
    if test -n "$OBJCOPY"; then
        BASIC_FIXUP_EXECUTABLE(OBJCOPY)
    fi
fi

AC_CHECK_TOOLS(OBJDUMP, [gobjdump objdump])
if test "x$OBJDUMP" != x; then
  # Only used for compare.sh; we can live without it. BASIC_FIXUP_EXECUTABLE bails if argument is missing.
  BASIC_FIXUP_EXECUTABLE(OBJDUMP)
fi

if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
   AC_PATH_PROG(LIPO, lipo)
   BASIC_FIXUP_EXECUTABLE(LIPO)
fi

TOOLCHAIN_SETUP_JTREG

# Restore old path without tools dir
PATH="$OLD_PATH"
])


AC_DEFUN_ONCE([TOOLCHAIN_SETUP_COMPILER_FLAGS_FOR_LIBS],
[

###############################################################################
#
# How to compile shared libraries.
#

if test "x$GCC" = xyes; then
    COMPILER_NAME=gcc
    PICFLAG="-fPIC"
    LIBRARY_PREFIX=lib
    SHARED_LIBRARY='lib[$]1.so'
    STATIC_LIBRARY='lib[$]1.a'
    SHARED_LIBRARY_FLAGS="-shared"
    SHARED_LIBRARY_SUFFIX='.so'
    STATIC_LIBRARY_SUFFIX='.a'
    OBJ_SUFFIX='.o'
    EXE_SUFFIX=''
    SET_SHARED_LIBRARY_NAME='-Xlinker -soname=[$]1'
    SET_SHARED_LIBRARY_MAPFILE='-Xlinker -version-script=[$]1'
    C_FLAG_REORDER=''
    CXX_FLAG_REORDER=''
    SET_SHARED_LIBRARY_ORIGIN='-Xlinker -z -Xlinker origin -Xlinker -rpath -Xlinker \$$$$ORIGIN[$]1'
    SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$ORIGIN[$]1'
    LD="$CC"
    LDEXE="$CC"
    LDCXX="$CXX"
    LDEXECXX="$CXX"
    POST_STRIP_CMD="$STRIP -g"

    # Linking is different on MacOSX
    if test "x$OPENJDK_TARGET_OS" = xmacosx; then
        # Might change in the future to clang.
        COMPILER_NAME=gcc
        SHARED_LIBRARY='lib[$]1.dylib'
        SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
        SHARED_LIBRARY_SUFFIX='.dylib'
        EXE_SUFFIX=''
        SET_SHARED_LIBRARY_NAME='-Xlinker -install_name -Xlinker @rpath/[$]1'
        SET_SHARED_LIBRARY_MAPFILE=''
        SET_SHARED_LIBRARY_ORIGIN='-Xlinker -rpath -Xlinker @loader_path/.'
        SET_EXECUTABLE_ORIGIN="$SET_SHARED_LIBRARY_ORIGIN"
        POST_STRIP_CMD="$STRIP -S"
    fi
else
    if test "x$OPENJDK_TARGET_OS" = xsolaris; then
        # If it is not gcc, then assume it is the Oracle Solaris Studio Compiler
        COMPILER_NAME=ossc
        PICFLAG="-KPIC"
        LIBRARY_PREFIX=lib
        SHARED_LIBRARY='lib[$]1.so'
        STATIC_LIBRARY='lib[$]1.a'
        SHARED_LIBRARY_FLAGS="-G"
        SHARED_LIBRARY_SUFFIX='.so'
        STATIC_LIBRARY_SUFFIX='.a'
        OBJ_SUFFIX='.o'
        EXE_SUFFIX=''
        SET_SHARED_LIBRARY_NAME=''
        SET_SHARED_LIBRARY_MAPFILE='-M[$]1'
	C_FLAG_REORDER='-xF'
	CXX_FLAG_REORDER='-xF'
        SET_SHARED_LIBRARY_ORIGIN='-R\$$$$ORIGIN[$]1'
        SET_EXECUTABLE_ORIGIN="$SET_SHARED_LIBRARY_ORIGIN"
        CFLAGS_JDK="${CFLAGS_JDK} -D__solaris__"
        CXXFLAGS_JDK="${CXXFLAGS_JDK} -D__solaris__"
        CFLAGS_JDKLIB_EXTRA='-xstrconst'
        POST_STRIP_CMD="$STRIP -x"
        POST_MCS_CMD="$MCS -d -a \"JDK $FULL_VERSION\""
    fi
    if test "x$OPENJDK_TARGET_OS" = xwindows; then
        # If it is not gcc, then assume it is the MS Visual Studio compiler
        COMPILER_NAME=cl
        PICFLAG=""
        LIBRARY_PREFIX=
        SHARED_LIBRARY='[$]1.dll'
        STATIC_LIBRARY='[$]1.lib'
        SHARED_LIBRARY_FLAGS="-LD"
        SHARED_LIBRARY_SUFFIX='.dll'
        STATIC_LIBRARY_SUFFIX='.lib'
        OBJ_SUFFIX='.obj'
        EXE_SUFFIX='.exe'
        SET_SHARED_LIBRARY_NAME=''
        SET_SHARED_LIBRARY_MAPFILE=''
        SET_SHARED_LIBRARY_ORIGIN=''
        SET_EXECUTABLE_ORIGIN=''
    fi
fi

AC_SUBST(COMPILER_NAME)
AC_SUBST(OBJ_SUFFIX)
AC_SUBST(SHARED_LIBRARY)
AC_SUBST(STATIC_LIBRARY)
AC_SUBST(LIBRARY_PREFIX)
AC_SUBST(SHARED_LIBRARY_SUFFIX)
AC_SUBST(STATIC_LIBRARY_SUFFIX)
AC_SUBST(EXE_SUFFIX)
AC_SUBST(SHARED_LIBRARY_FLAGS)
AC_SUBST(SET_SHARED_LIBRARY_NAME)
AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)
AC_SUBST(C_FLAG_REORDER)
AC_SUBST(CXX_FLAG_REORDER)
AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)
AC_SUBST(SET_EXECUTABLE_ORIGIN)
AC_SUBST(POST_STRIP_CMD)
AC_SUBST(POST_MCS_CMD)

# The (cross) compiler is now configured, we can now test capabilities
# of the target platform.
])

AC_DEFUN_ONCE([TOOLCHAIN_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION],
[

###############################################################################
#
# Setup the opt flags for different compilers
# and different operating systems.
#

#
# NOTE: check for -mstackrealign needs to be below potential addition of -m32
#
if test "x$OPENJDK_TARGET_CPU_BITS" = x32 && test "x$OPENJDK_TARGET_OS" = xmacosx; 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.
    CFLAGS="$CFLAGS -mstackrealign"
    AC_MSG_CHECKING([if 32-bit compiler supports -mstackrealign])
    AC_LINK_IFELSE([AC_LANG_SOURCE([[int main() { return 0; }]])],
                   [
		        AC_MSG_RESULT([yes])
                   ],
	           [
		        AC_MSG_RESULT([no])
	                AC_MSG_ERROR([The selected compiler $CXX does not support -mstackrealign! Try to put another compiler in the path.])
	           ])
fi

C_FLAG_DEPS="-MMD -MF"
CXX_FLAG_DEPS="-MMD -MF"

case $COMPILER_TYPE in
  CC )
    case $COMPILER_NAME in
      gcc )
      	case $OPENJDK_TARGET_OS in
	  macosx )
	    # On MacOSX we optimize for size, something
	    # we should do for all platforms?
	    C_O_FLAG_HI="-Os"
	    C_O_FLAG_NORM="-Os"
	    C_O_FLAG_NONE=""
	    ;;
	  *)
	    C_O_FLAG_HI="-O3"
	    C_O_FLAG_NORM="-O2"
	    C_O_FLAG_NONE="-O0"
	    ;;
	esac
        CXX_O_FLAG_HI="$C_O_FLAG_HI"
        CXX_O_FLAG_NORM="$C_O_FLAG_NORM"
        CXX_O_FLAG_NONE="$C_O_FLAG_NONE"
        CFLAGS_DEBUG_SYMBOLS="-g"
        CXXFLAGS_DEBUG_SYMBOLS="-g"
        if test "x$OPENJDK_TARGET_CPU_BITS" = "x64" && test "x$DEBUG_LEVEL" = "xfastdebug"; then
            CFLAGS_DEBUG_SYMBOLS="-g1"
            CXXFLAGS_DEBUG_SYMBOLS="-g1"
        fi
        ;;
      ossc )
        #
        # Forte has different names for this with their C++ compiler...
        #
        C_FLAG_DEPS="-xMMD -xMF"
        CXX_FLAG_DEPS="-xMMD -xMF"

        # Extra options used with 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.
        #
        # Use non-standard floating point mode (not IEEE 754)
        CC_HIGHEST="$CC_HIGHEST -fns"
        # Do some simplification of floating point arithmetic (not IEEE 754)
        CC_HIGHEST="$CC_HIGHEST -fsimple"
        # Use single precision floating point with 'float'
        CC_HIGHEST="$CC_HIGHEST -fsingle"
        # Assume memory references via basic pointer types do not alias
        #   (Source with excessing pointer casting and data access with mixed
        #    pointer types are not recommended)
        CC_HIGHEST="$CC_HIGHEST -xalias_level=basic"
        # Use intrinsic or inline versions for math/std functions
        #   (If you expect perfect errno behavior, do not use this)
        CC_HIGHEST="$CC_HIGHEST -xbuiltin=%all"
        # Loop data dependency optimizations (need -xO3 or higher)
        CC_HIGHEST="$CC_HIGHEST -xdepend"
        # 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)
        CC_HIGHEST="$CC_HIGHEST -xrestrict"
        # Inline some library routines
        #   (If you expect perfect errno behavior, do not use this)
        CC_HIGHEST="$CC_HIGHEST -xlibmil"
        # Use optimized math routines
        #   (If you expect perfect errno behavior, do not use this)
        #  Can cause undefined external on Solaris 8 X86 on __sincos, removing for now
        #CC_HIGHEST="$CC_HIGHEST -xlibmopt"

        if test "x$OPENJDK_TARGET_CPU" = xsparc; then
          CFLAGS_JDK="${CFLAGS_JDK} -xmemalign=4s"
          CXXFLAGS_JDK="${CXXFLAGS_JDK} -xmemalign=4s"
        fi

        case $OPENJDK_TARGET_CPU_ARCH in
          x86)
            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" = xx86; then
               C_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST -xchip=pentium"
               CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_HIGHEST -xchip=pentium"
            fi
            ;;
          sparc)
            CFLAGS_JDKLIB_EXTRA="${CFLAGS_JDKLIB_EXTRA} -xregs=no%appl"
            CXXFLAGS_JDKLIB_EXTRA="${CXXFLAGS_JDKLIB_EXTRA} -xregs=no%appl"
            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=""
            ;;
        esac

    CFLAGS_DEBUG_SYMBOLS="-g -xs"
    CXXFLAGS_DEBUG_SYMBOLS="-g0 -xs"
    esac
    ;;
  CL )
    C_O_FLAG_HIGHEST="-O2"
    C_O_FLAG_HI="-O1"
    C_O_FLAG_NORM="-O1"
    C_O_FLAG_NONE="-Od"
    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"
    ;;
esac

if test -z "$C_O_FLAG_HIGHEST"; then
   C_O_FLAG_HIGHEST="$C_O_FLAG_HI"
fi

if test -z "$CXX_O_FLAG_HIGHEST"; then
   CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_HI"
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_SUBST(C_FLAG_DEPS)
AC_SUBST(CXX_FLAG_DEPS)
])

AC_DEFUN_ONCE([TOOLCHAIN_SETUP_COMPILER_FLAGS_FOR_JDK],
[

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

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])])

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=$with_extra_cflags
LEGACY_EXTRA_CXXFLAGS=$with_extra_cxxflags
LEGACY_EXTRA_LDFLAGS=$with_extra_ldflags

AC_SUBST(LEGACY_EXTRA_CFLAGS)
AC_SUBST(LEGACY_EXTRA_CXXFLAGS)
AC_SUBST(LEGACY_EXTRA_LDFLAGS)

###############################################################################
#
# Now setup the CFLAGS and LDFLAGS for the JDK build.
# Later we will also have CFLAGS and LDFLAGS for the hotspot subrepo build.
#
case $COMPILER_NAME in
      gcc )
      	  CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -W -Wall -Wno-unused -Wno-parentheses \
                          -pipe \
                          -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
          ;;
      ossc )
          CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -DTRACING -DMACRO_MEMSYS_OPS -DBREAKPTS"
          case $OPENJDK_TARGET_CPU_ARCH in
          x86 )
            CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DcpuIntel -Di586 -D$OPENJDK_TARGET_CPU_LEGACY_LIB"
       	    CFLAGS_JDK="$CFLAGS_JDK -erroff=E_BAD_PRAGMA_PACK_VALUE"
          ;;
          esac

      	  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"

          LDFLAGS_JDK="$LDFLAGS_JDK -z defs -xildoff -ztext"
          LDFLAGS_CXX_JDK="$LDFLAGS_CXX_JDK -norunpath -xnolib"
          ;;
      cl )
          CCXXFLAGS_JDK="$CCXXFLAGS $CCXXFLAGS_JDK -Zi -MD -Zc:wchar_t- -W3 -wd4800 \
               -D_STATIC_CPPLIB -D_DISABLE_DEPRECATE_STATIC_CPPLIB -DWIN32_LEAN_AND_MEAN \
	       -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE \
	       -DWIN32 -DIAL"
          case $OPENJDK_TARGET_CPU in
              x86 )
                  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_X86_ -Dx86"
                  ;;
              x86_64 )
                  CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_AMD64_ -Damd64"
                  ;;
          esac
          ;;
esac

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

# 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

CCXXFLAGS_JDK="$CCXXFLAGS_JDK $ADD_LP64"

# The package path is used only on macosx?
PACKAGE_PATH=/opt/local
AC_SUBST(PACKAGE_PATH)

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
    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -D_BIG_ENDIAN"
fi
if test "x$OPENJDK_TARGET_OS" = xlinux; then
    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DLINUX"
fi
if test "x$OPENJDK_TARGET_OS" = xwindows; then
    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DWINDOWS"
fi
if test "x$OPENJDK_TARGET_OS" = xsolaris; then
    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DSOLARIS"
fi
if test "x$OPENJDK_TARGET_OS" = xmacosx; then
    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DMACOSX -D_ALLBSD_SOURCE -D_DARWIN_UNLIMITED_SELECT"
    # Setting these parameters makes it an error to link to macosx APIs that are
    # newer than the given OS version and makes the linked binaries compatible even
    # if built on a newer version of the OS.
    # The expected format is X.Y.Z
    MACOSX_VERSION_MIN=10.7.0
    AC_SUBST(MACOSX_VERSION_MIN)
    # The macro takes the version with no dots, ex: 1070
    # Let the flags variables get resolved in make for easier override on make
    # command line.
    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DMAC_OS_X_VERSION_MAX_ALLOWED=\$(subst .,,\$(MACOSX_VERSION_MIN)) -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"
    LDFLAGS_JDK="$LDFLAGS_JDK -mmacosx-version-min=\$(MACOSX_VERSION_MIN)"
fi
if test "x$OPENJDK_TARGET_OS" = xbsd; then
    CCXXFLAGS_JDK="$CCXXFLAGS_JDK -DBSD -D_ALLBSD_SOURCE"
fi
if test "x$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

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

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/$OPENJDK_TARGET_OS_API_DIR/javavm/export \
        -I${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 $CFLAGS_JDK"
CXXFLAGS_JDKEXE="$CCXXFLAGS_JDK $CXXFLAGS_JDK"

# 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$COMPILER_NAME" = xcl; then
    LDFLAGS_JDK="$LDFLAGS_JDK -nologo -opt:ref -incremental:no"
    if test "x$OPENJDK_TARGET_CPU" = xx86; then
        LDFLAGS_JDK="$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$COMPILER_NAME" = xgcc; then
        # If this is a --hash-style=gnu system, use --hash-style=both, why?
        HAS_GNU_HASH=`$CC -dumpspecs 2>/dev/null | $GREP 'hash-style=gnu'`
        if test -n "$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.
          LDFLAGS_JDK="${LDFLAGS_JDK} -Xlinker -z -Xlinker defs"
          if test "x$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="${LDFLAGS_JDK} -Xlinker -O1"
          fi
        fi
    fi
    LDFLAGS_JDKLIB="${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$COMPILER_NAME" = xossc; then
        LDFLAGS_JDKLIB_SUFFIX="$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
fi

AC_SUBST(CFLAGS_JDKLIB)
AC_SUBST(CFLAGS_JDKEXE)

AC_SUBST(CXXFLAGS_JDKLIB)
AC_SUBST(CXXFLAGS_JDKEXE)

AC_SUBST(LDFLAGS_JDKLIB)
AC_SUBST(LDFLAGS_JDKEXE)
AC_SUBST(LDFLAGS_JDKLIB_SUFFIX)
AC_SUBST(LDFLAGS_JDKEXE_SUFFIX)
AC_SUBST(LDFLAGS_CXX_JDK)
])


# TOOLCHAIN_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
#                                   [RUN-IF-FALSE])
# ------------------------------------------------------------
# Check that the c and c++ compilers support an argument
AC_DEFUN([TOOLCHAIN_COMPILER_CHECK_ARGUMENTS],
[
  AC_MSG_CHECKING([if 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"

  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
])

AC_DEFUN_ONCE([TOOLCHAIN_SETUP_COMPILER_FLAGS_MISC],
[
  # Some Zero and Shark settings.
  # ZERO_ARCHFLAG tells the compiler which mode to build for
  case "${OPENJDK_TARGET_CPU}" in
    s390)
      ZERO_ARCHFLAG="-m31"
      ;;
    *)
      ZERO_ARCHFLAG="-m${OPENJDK_TARGET_CPU_BITS}"
  esac
  TOOLCHAIN_COMPILER_CHECK_ARGUMENTS([$ZERO_ARCHFLAG], [], [ZERO_ARCHFLAG=""])
  AC_SUBST(ZERO_ARCHFLAG)

  # Check that the compiler supports -mX flags
  # Set COMPILER_SUPPORTS_TARGET_BITS_FLAG to 'true' if it does
  TOOLCHAIN_COMPILER_CHECK_ARGUMENTS([-m${OPENJDK_TARGET_CPU_BITS}],
    [COMPILER_SUPPORTS_TARGET_BITS_FLAG=true],
    [COMPILER_SUPPORTS_TARGET_BITS_FLAG=false])
  AC_SUBST(COMPILER_SUPPORTS_TARGET_BITS_FLAG)
])

# Setup the JTREG paths
AC_DEFUN_ONCE([TOOLCHAIN_SETUP_JTREG],
[
  AC_ARG_WITH(jtreg, [AS_HELP_STRING([--with-jtreg],
  [Regression Test Harness @<:@probed@:>@])],
  [],
  [with_jtreg=no])

  if test "x$with_jtreg" = xno; then
    # jtreg disabled
    AC_MSG_CHECKING([for jtreg])
    AC_MSG_RESULT(no)
  else
    if test "x$with_jtreg" != xyes; then
      # with path specified.
      JT_HOME="$with_jtreg"
    fi

    if test "x$JT_HOME" != x; then
      AC_MSG_CHECKING([for jtreg])

      # use JT_HOME enviroment var.
      BASIC_FIXUP_PATH([JT_HOME])

      # jtreg win32 script works for everybody
      JTREGEXE="$JT_HOME/win32/bin/jtreg"

      if test ! -f "$JTREGEXE"; then
        AC_MSG_ERROR([JTReg executable does not exist: $JTREGEXE])
      fi

      AC_MSG_RESULT($JTREGEXE)
    else
      # try to find jtreg on path
      BASIC_REQUIRE_PROG(JTREGEXE, jtreg)
      JT_HOME="`$DIRNAME $JTREGEXE`"
    fi
  fi

  AC_SUBST(JT_HOME)
  AC_SUBST(JTREGEXE)
])