js/src/configure.in
author Rafael Ávila de Espíndola <respindola@mozilla.com>
Thu, 01 Sep 2011 22:01:56 -0400
changeset 76433 deec82bfd1788bded6cefd88a74a2dbf8afdb169
parent 76412 11247af82311ed6d6fc2bc19782fc978ee0aca48
child 76435 adda17b48d1e913a78e02ecae2d88410afeed016
permissions -rw-r--r--
revert 11247af82311, e3626f903f9f and 7ee51f8ea940. CLOSED TREE

dnl -*- Mode: Autoconf; tab-width: 4; indent-tabs-mode: nil; -*-
dnl vi: set tabstop=4 shiftwidth=4 expandtab syntax=m4:
dnl ***** BEGIN LICENSE BLOCK *****
dnl Version: MPL 1.1/GPL 2.0/LGPL 2.1
dnl
dnl The contents of this file are subject to the Mozilla Public License Version
dnl 1.1 (the "License"); you may not use this file except in compliance with
dnl the License. You may obtain a copy of the License at
dnl http://www.mozilla.org/MPL/
dnl
dnl Software distributed under the License is distributed on an "AS IS" basis,
dnl WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
dnl for the specific language governing rights and limitations under the
dnl License.
dnl
dnl The Original Code is this file as it was released upon August 6, 1998.
dnl
dnl The Initial Developer of the Original Code is
dnl Christopher Seawood.
dnl Portions created by the Initial Developer are Copyright (C) 1998-2001
dnl the Initial Developer. All Rights Reserved.
dnl
dnl Contributor(s):
dnl   Jamie Zawinski <jwz@jwz.org>
dnl   gettimeofday args check
dnl   Christopher Blizzard <blizzard@appliedtheory.com>
dnl   gnomefe update & enable-pthreads
dnl   Ramiro Estrugo <ramiro@netscape.com>
dnl   X11 makedepend support
dnl   Insure support.
dnl   Henry Sobotka <sobotka@axess.com>
dnl   OS/2 support
dnl   Dan Mosedale <dmose@mozilla.org>
dnl   LDAP support
dnl   Seth Spitzer <sspitzer@netscape.com>
dnl   xpctools support
dnl   Benjamin Smedberg <benjamin@smedbergs.us>
dnl   Howard Chu <hyc@symas.com>
dnl   MSYS support
dnl   Mark Mentovai <mark@moxienet.com>:
dnl   Mac OS X 10.4 support
dnl   Giorgio Maone <g.maone@informaction.com>
dnl   MSVC l10n compatible version check
dnl   Ben Turner <mozilla@songbirdnest.com>
dnl   Windows x64 support
dnl   Makoto Kato <m_kato@ga2.so-net.ne.jp>
dnl
dnl Alternatively, the contents of this file may be used under the terms of
dnl either the GNU General Public License Version 2 or later (the "GPL"), or
dnl the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
dnl in which case the provisions of the GPL or the LGPL are applicable instead
dnl of those above. If you wish to allow use of your version of this file only
dnl under the terms of either the GPL or the LGPL, and not to allow others to
dnl use your version of this file under the terms of the MPL, indicate your
dnl decision by deleting the provisions above and replace them with the notice
dnl and other provisions required by the GPL or the LGPL. If you do not delete
dnl the provisions above, a recipient may use your version of this file under
dnl the terms of any one of the MPL, the GPL or the LGPL.
dnl
dnl ***** END LICENSE BLOCK *****

dnl Process this file with autoconf to produce a configure script.
dnl ========================================================

AC_PREREQ(2.13)
AC_INIT(jsapi.h)
AC_CONFIG_AUX_DIR(${srcdir}/build/autoconf)
AC_CONFIG_HEADER(js-config.h)
AC_CANONICAL_SYSTEM
TARGET_CPU="${target_cpu}"
TARGET_VENDOR="${target_vendor}"
TARGET_OS="${target_os}"

dnl ========================================================
dnl =
dnl = Don't change the following two lines.  Doing so breaks:
dnl =
dnl = CFLAGS="-foo" ./configure
dnl =
dnl ========================================================
CFLAGS="${CFLAGS=}"
CPPFLAGS="${CPPFLAGS=}"
CXXFLAGS="${CXXFLAGS=}"
LDFLAGS="${LDFLAGS=}"
HOST_CFLAGS="${HOST_CFLAGS=}"
HOST_CXXFLAGS="${HOST_CXXFLAGS=}"
HOST_LDFLAGS="${HOST_LDFLAGS=}"

dnl ========================================================
dnl = Preserve certain environment flags passed to configure
dnl = We want sub projects to receive the same flags
dnl = untainted by this configure script
dnl ========================================================
_SUBDIR_CC="$CC"
_SUBDIR_CXX="$CXX"
_SUBDIR_CFLAGS="$CFLAGS"
_SUBDIR_CPPFLAGS="$CPPFLAGS"
_SUBDIR_CXXFLAGS="$CXXFLAGS"
_SUBDIR_LDFLAGS="$LDFLAGS"
_SUBDIR_HOST_CC="$HOST_CC"
_SUBDIR_HOST_CFLAGS="$HOST_CFLAGS"
_SUBDIR_HOST_CXXFLAGS="$HOST_CXXFLAGS"
_SUBDIR_HOST_LDFLAGS="$HOST_LDFLAGS"
_SUBDIR_CONFIG_ARGS="$ac_configure_args"

dnl Set the version number of the libs included with mozilla
dnl ========================================================
NSPR_VERSION=4

dnl Set the minimum version of toolkit libs used by mozilla
dnl ========================================================
PERL_VERSION=5.006
PYTHON_VERSION=2.5
WINDRES_VERSION=2.14.90
W32API_VERSION=3.14

MSMANIFEST_TOOL=

dnl Set various checks
dnl ========================================================
MISSING_X=
AC_PROG_AWK

dnl Initialize the Pthread test variables early so they can be
dnl  overridden by each platform.
dnl ========================================================
USE_PTHREADS=
_PTHREAD_LDFLAGS=""

dnl Do not allow a separate objdir build if a srcdir build exists.
dnl ==============================================================
_topsrcdir=`cd \`dirname $0\`; pwd`
_objdir=`pwd`

if test "$_topsrcdir" != "$_objdir"
then
  # Check for a couple representative files in the source tree
  _conflict_files=
  for file in $_topsrcdir/Makefile $_topsrcdir/config/autoconf.mk; do
    if test -f $file; then
      _conflict_files="$_conflict_files $file"
    fi
  done
  if test "$_conflict_files"; then
    echo "***"
    echo "*   Your source tree contains these files:"
    for file in $_conflict_files; do
      echo "*         $file"
    done
    cat 1>&2 <<-EOF
	*   This indicates that you previously built in the source tree.
	*   A source tree build can confuse the separate objdir build.
	*
	*   To clean up the source tree:
	*     1. cd $_topsrcdir
	*     2. gmake distclean
	***
	EOF
    exit 1
    break
  fi
fi
MOZ_BUILD_ROOT=`pwd`

dnl Choose where to put the 'dist' directory.
dnl ==============================================================

MOZ_ARG_WITH_STRING(dist-dir,
[  --with-dist-dir=DIR     Use DIR as 'dist' staging area.  DIR may be
                          relative to the top of SpiderMonkey build tree,
                          or absolute.],
    TOP_DIST=$withval,
    TOP_DIST=dist)
AC_SUBST(TOP_DIST)

dnl Default to MSVC for win32 and gcc-4.2 for darwin
dnl ==============================================================
if test -z "$CROSS_COMPILE"; then
case "$target" in
*-mingw*)
    if test -z "$CC"; then CC=cl; fi
    if test -z "$CXX"; then CXX=cl; fi
    if test -z "$CPP"; then CPP="cl -E -nologo"; fi
    if test -z "$CXXCPP"; then CXXCPP="cl -TP -E -nologo"; ac_cv_prog_CXXCPP="$CXXCPP"; fi
    if test -z "$LD"; then LD=link; fi
    if test -z "$AS"; then
        case "${target_cpu}" in
        i*86)
            AS=ml;
            ;;
        x86_64)
            AS=ml64;
            ;;
        esac
    fi
    if test -z "$MIDL"; then MIDL=midl; fi
    ;;
*-darwin*)
    if test -z "$CC"; then CC=gcc-4.2; fi
    if test -z "$CXX"; then CXX=g++-4.2; fi
    ;;
esac
fi

COMPILE_ENVIRONMENT=1
MOZ_ARG_DISABLE_BOOL(compile-environment,
[  --disable-compile-environment
                          Disable compiler/library checks.],
    COMPILE_ENVIRONMENT= )
AC_SUBST(COMPILE_ENVIRONMENT)

dnl Check for Perl first -- needed for win32 SDK checks
MOZ_PATH_PROGS(PERL, $PERL perl5 perl )
if test -z "$PERL" -o "$PERL" = ":"; then
    AC_MSG_ERROR([perl not found in \$PATH])
fi

MOZ_ARG_ENABLE_BOOL(shared-js,
[  --disable-shared-js
                          Do not create a shared library.],
    DISABLE_SHARED_JS=0,
    DISABLE_SHARED_JS=1)

if test "$DISABLE_SHARED_JS" = "1" ; then
  AC_DEFINE(STATIC_EXPORTABLE_JS_API)
else
  JS_SHARED_LIBRARY=1
fi
AC_SUBST(JS_SHARED_LIBRARY)

dnl ========================================================
dnl = Android uses a very custom (hacky) toolchain; we need to do this
dnl = here, so that the compiler checks can succeed
dnl ========================================================

MOZ_ARG_WITH_STRING(android-ndk,
[  --with-android-ndk=DIR
                          location where the Android NDK can be found],
    android_ndk=$withval)

MOZ_ARG_WITH_STRING(android-toolchain,
[  --with-android-toolchain=DIR
                          location of the android toolchain, default NDK/build/prebuilt/HOST/arm-eabi-4.4.0],
    android_toolchain=$withval)


MOZ_ARG_WITH_STRING(android-version,
[  --with-android-version=VER
                          android platform version, default 5],
    android_version=$withval,
    android_version=5)

MOZ_ARG_WITH_STRING(android-sdk,
[  --with-android-sdk=DIR
                          location where the Android SDK can be found (base directory, e.g. .../android/platforms/android-6)],
    android_sdk=$withval)

MOZ_ARG_WITH_STRING(android-platform,
[  --with-android-platform=DIR
                           location of platform dir, default NDK/build/platforms/android-5/arch-arm],
    android_platform=$withval)

MOZ_ARG_ENABLE_BOOL(android-libstdcxx,
[  --enable-android-libstdcxx
                          use GNU libstdc++ instead of STLPort for NDK >= 5],
    MOZ_ANDROID_LIBSTDCXX=1,
    MOZ_ANDROID_LIBSTDCXX= )

case "$target" in
arm-linux*-android*|*-linuxandroid*)
    android_tool_prefix="arm-linux-androideabi"
    ;;
arm-android-eabi)
    android_tool_prefix="arm-eabi"
    ;;
*)
    android_tool_prefix="$target_os"
    ;;
esac

case "$target" in
*-android*|*-linuxandroid*)
    if test -z "$android_ndk" ; then
        AC_MSG_ERROR([You must specify --with-android-ndk=/path/to/ndk when targeting Android.])
    fi

    if test -z "$android_sdk" ; then
        AC_MSG_ERROR([You must specify --with-android-sdk=/path/to/sdk when targeting Android.])
    fi

    android_platform_tools="$android_sdk"/../../platform-tools
    if test ! -d "$android_platform_tools" ; then
        android_platform_tools="$android_sdk"/tools # SDK Tools < r8
    fi

    if test -z "$android_toolchain" ; then
        AC_MSG_CHECKING([for android toolchain directory])

        kernel_name=`uname -s | tr "[[:upper:]]" "[[:lower:]]"`

        android_toolchain="$android_ndk"/build/prebuilt/$kernel_name-x86/arm-eabi-4.4.0

        # With newer NDK, the toolchain path has changed.
        if ! test -d "$android_toolchain" ; then
            android_toolchain="$android_ndk"/toolchains/arm-$kernel_name-androideabi-4.4.3/prebuilt/$kernel_name-x86
        fi

        if test -d "$android_toolchain" ; then
            AC_MSG_RESULT([$android_toolchain])
        else
            AC_MSG_ERROR([not found. You have to specify --with-android-toolchain=/path/to/ndk/toolchain.])
        fi
    fi

    if test -z "$android_platform" ; then
        AC_MSG_CHECKING([for android platform directory])

        android_platform="$android_ndk"/build/platforms/android-"$android_version"/arch-"$target_cpu"

        # With newer NDK, the platform path has changed.
        if ! test -d "$android_platform" ; then
            android_platform="$android_ndk"/platforms/android-"$android_version"/arch-"$target_cpu"
        fi

        if test -d "$android_platform" ; then
            AC_MSG_RESULT([$android_platform])
        else
            AC_MSG_ERROR([not found. You have to specify --with-android-platform=/path/to/ndk/platform.])
        fi
    fi

    dnl set up compilers
    AS="$android_toolchain"/bin/"$android_tool_prefix"-as
    CC="$android_toolchain"/bin/"$android_tool_prefix"-gcc
    CXX="$android_toolchain"/bin/"$android_tool_prefix"-g++
    CPP="$android_toolchain"/bin/"$android_tool_prefix"-cpp
    LD="$android_toolchain"/bin/"$android_tool_prefix"-ld
    AR="$android_toolchain"/bin/"$android_tool_prefix"-ar
    RANLIB="$android_toolchain"/bin/"$android_tool_prefix"-ranlib
    STRIP="$android_toolchain"/bin/"$android_tool_prefix"-strip

    if test -n "$MOZ_ANDROID_LIBSTDCXX" ; then
       if test ! -e "$android_ndk/sources/cxx-stl/gnu-libstdc++/libs/armeabi-v7a/libstdc++.a" ; then
          AC_MSG_ERROR([Cannot find path to libstdc++ (NDK version >= 5?)])
       fi
       STLPORT_CPPFLAGS="-I$android_ndk/sources/cxx-stl/gnu-libstdc++/include -I$android_ndk/sources/cxx-stl/gnu-libstdc++/libs/armeabi-v7a/include -D_GLIBCXX_PERMIT_BACKWARD_HASH"
       STLPORT_LDFLAGS="-L$android_ndk/sources/cxx-stl/gnu-libstdc++/libs/armeabi-v7a"
       STLPORT_LIBS="-lstdc++"
    elif test -e "$android_ndk/sources/cxx-stl/stlport/libs/armeabi-v7a/libstlport_static.a" ; then
       STLPORT_CPPFLAGS="-I$android_ndk/sources/cxx-stl/stlport/stlport"
       STLPORT_LDFLAGS="-L$android_ndk/sources/cxx-stl/stlport/libs/armeabi-v7a/"
       STLPORT_LIBS="-lstlport_static"
    elif  test -e "$android_ndk/tmp/ndk-digit/build/install/sources/cxx-stl/stlport/libs/armeabi-v7a/libstlport_static.a" ; then
       STLPORT_CPPFLAGS="-I$android_ndk/sources/cxx-stl/stlport/stlport"
       STLPORT_LDFLAGS="-L$android_ndk/tmp/ndk-digit/build/install/sources/cxx-stl/stlport/libs/armeabi-v7a"
       STLPORT_LIBS="-lstlport_static"
    elif test "$target" != "arm-android-eabi"; then
       dnl fail if we're not building with NDKr4
       AC_MSG_ERROR([Couldn't find path to stlport in the android ndk])
    fi

    CPPFLAGS="-I$android_platform/usr/include $STLPORT_CPPFLAGS $CPPFLAGS"
    CFLAGS="-mandroid -I$android_platform/usr/include -fno-short-enums -fno-exceptions $CFLAGS"
    CXXFLAGS="-mandroid -I$android_platform/usr/include -fno-short-enums -fno-exceptions $CXXFLAGS"
    LIBS="$LIBS $STLPORT_LIBS"

    dnl Add -llog by default, since we use it all over the place.
    dnl Add --allow-shlib-undefined, because libGLESv2 links to an
    dnl undefined symbol (present on the hardware, just not in the
    dnl NDK.)
    LDFLAGS="-mandroid $STLPORT_LDFLAGS -L$android_platform/usr/lib -Wl,-rpath-link=$android_platform/usr/lib --sysroot=$android_platform -llog -Wl,--allow-shlib-undefined $LDFLAGS"

    dnl prevent cross compile section from using these flags as host flags
    if test -z "$HOST_CPPFLAGS" ; then
        HOST_CPPFLAGS=" "
    fi
    if test -z "$HOST_CFLAGS" ; then
        HOST_CFLAGS=" "
    fi
    if test -z "$HOST_CXXFLAGS" ; then
        HOST_CXXFLAGS=" "
    fi
    if test -z "$HOST_LDFLAGS" ; then
        HOST_LDFLAGS=" "
    fi

    ANDROID_NDK="${android_ndk}"
    ANDROID_TOOLCHAIN="${android_toolchain}"
    ANDROID_PLATFORM="${android_platform}"
    ANDROID_SDK="${android_sdk}"
    ANDROID_PLATFORM_TOOLS="${android_platform_tools}"
    ANDROID_VERSION="${android_version}"

    # save these for libffi's subconfigure,
    # which doesn't know how to figure this stuff out on its own
    ANDROID_CFLAGS="$CFLAGS"
    ANDROID_CPPFLAGS="$CPPFLAGS"
    ANDROID_LDFLAGS="$LDFLAGS"

    AC_DEFINE(ANDROID)
    AC_DEFINE_UNQUOTED(ANDROID_VERSION, $android_version)
    AC_SUBST(ANDROID_VERSION)
    CROSS_COMPILE=1
    MOZ_CHROME_FILE_FORMAT=omni
    ;;
esac

AC_SUBST(ANDROID_NDK)
AC_SUBST(ANDROID_TOOLCHAIN)
AC_SUBST(ANDROID_PLATFORM)
AC_SUBST(ANDROID_SDK)
AC_SUBST(ANDROID_PLATFORM_TOOLS)

dnl ========================================================
dnl Checks for compilers.
dnl ========================================================
dnl Set CROSS_COMPILE in the environment when running configure
dnl to use the cross-compile setup for now
dnl ========================================================

dnl AR_FLAGS set here so HOST_AR_FLAGS can be set correctly (see bug 538269)
AR_FLAGS='cr $@'

if test "$COMPILE_ENVIRONMENT"; then

# Note:
#   In Mozilla, we use the names $target, $host and $build incorrectly, but are
#   too far gone to back out now. See Bug 475488:
#     - When we say $target, we mean $host, that is, the system on which
#       Mozilla will be run.
#     - When we say $host, we mean $build, that is, the system on which Mozilla
#       is built.
#     - $target (in its correct usage) is for compilers who generate code for a
#       different platform than $host, so it would not be used by Mozilla.
if test "$target" != "$host"; then
    echo "cross compiling from $host to $target"

    _SAVE_CC="$CC"
    _SAVE_CFLAGS="$CFLAGS"
    _SAVE_LDFLAGS="$LDFLAGS"

    AC_MSG_CHECKING([for host c compiler])
    AC_CHECK_PROGS(HOST_CC, $HOST_CC gcc cc /usr/ucb/cc cl icc, "")
    if test -z "$HOST_CC"; then
        AC_MSG_ERROR([no acceptable c compiler found in \$PATH])
    fi
    AC_MSG_RESULT([$HOST_CC])
    AC_MSG_CHECKING([for host c++ compiler])
    AC_CHECK_PROGS(HOST_CXX, $HOST_CXX $CCC c++ g++ gcc CC cxx cc++ cl icc, "")
    if test -z "$HOST_CXX"; then
        AC_MSG_ERROR([no acceptable c++ compiler found in \$PATH])
    fi
    AC_MSG_RESULT([$HOST_CXX])

    if test -z "$HOST_CFLAGS"; then
        HOST_CFLAGS="$CFLAGS"
    fi
    if test -z "$HOST_CXXFLAGS"; then
        HOST_CXXFLAGS="$CXXFLAGS"
    fi
    if test -z "$HOST_LDFLAGS"; then
        HOST_LDFLAGS="$LDFLAGS"
    fi
    if test -z "$HOST_AR_FLAGS"; then
        HOST_AR_FLAGS="$AR_FLAGS"
    fi
    AC_CHECK_PROGS(HOST_RANLIB, $HOST_RANLIB ranlib, ranlib, :)
    AC_CHECK_PROGS(HOST_AR, $HOST_AR ar, ar, :)
    CC="$HOST_CC"
    CFLAGS="$HOST_CFLAGS"
    LDFLAGS="$HOST_LDFLAGS"

    AC_MSG_CHECKING([whether the host c compiler ($HOST_CC $HOST_CFLAGS $HOST_LDFLAGS) works])
    AC_TRY_COMPILE([], [return(0);],
	[ac_cv_prog_hostcc_works=1 AC_MSG_RESULT([yes])],
	AC_MSG_ERROR([installation or configuration problem: host compiler $HOST_CC cannot create executables.]) )

    CC="$HOST_CXX"
    CFLAGS="$HOST_CXXFLAGS"

    AC_MSG_CHECKING([whether the host c++ compiler ($HOST_CXX $HOST_CXXFLAGS $HOST_LDFLAGS) works])
    AC_TRY_COMPILE([], [return(0);],
	[ac_cv_prog_hostcxx_works=1 AC_MSG_RESULT([yes])],
	AC_MSG_ERROR([installation or configuration problem: host compiler $HOST_CXX cannot create executables.]) )

    CC=$_SAVE_CC
    CFLAGS=$_SAVE_CFLAGS
    LDFLAGS=$_SAVE_LDFLAGS

    case "$build:$target" in
      powerpc-apple-darwin8*:i?86-apple-darwin*)
        dnl The Darwin cross compiler doesn't necessarily point itself at a
        dnl root that has libraries for the proper architecture, it defaults
        dnl to the system root.  The libraries in the system root on current
        dnl versions of PPC OS X 10.4 aren't fat, so these target compiler
        dnl checks will fail.  Fake a working SDK in that case.
        _SAVE_CFLAGS=$CFLAGS
        _SAVE_CXXFLAGS=$CXXLAGS
        CFLAGS="-isysroot /Developer/SDKs/MacOSX10.5.sdk $CFLAGS"
        CXXFLAGS="-isysroot /Developer/SDKs/MacOSX10.5.sdk $CXXFLAGS"
        ;;
    esac

    case "$target" in
    *symbian*)
        AC_ARG_WITH(symbian-sdk,
        [  --with-symbian-sdk=SYMBIAN_SDK_DIR
                          The path to the Symbian SDK],
        SYMBIAN_SDK_DIR=$withval)

        OS_EXE_CFLAGS="$OS_EXE_CFLAGS -D__EXE__"
        CFLAGS="-MD -nostdinc"
        SYMBIAN_SYS_INCLUDE="-I$SYMBIAN_SDK_DIR/Epoc32/include -I$SYMBIAN_SDK_DIR/Epoc32/include/variant -I$SYMBIAN_SDK_DIR/Epoc32/include/stdapis"

        case "$target" in
        *-symbianelf)
            OS_TARGET=GCCE
            CC=arm-none-symbianelf-gcc.exe
            CXX=arm-none-symbianelf-g++.exe
            LD=arm-none-symbianelf-ld.exe
            AR=arm-none-symbianelf-ar.exe
            CPP=arm-none-symbianelf-cpp.exe
            CFLAGS="$CFLAGS -c -Wall -Wno-unknown-pragmas -fexceptions -march=armv5t -mapcs -pipe -msoft-float"
            CXXFLAGS="$CFLAGS -Wno-ctor-dtor-privacy"
            GCCE_INCLUDE="-include $SYMBIAN_SDK_DIR/EPOC32/INCLUDE/GCCE/GCCE.h -D__PRODUCT_INCLUDE__=$SYMBIAN_SDK_DIR/Epoc32/include/variant/Symbian_OS_v9.2.hrh"
            CFLAGS="$CFLAGS ${GCCE_INCLUDE} -x c"
            CXXFLAGS="$CXXFLAGS ${GCCE_INCLUDE} -x c++"
            CPPFLAGS="$CPPFLAGS ${SYMBIAN_SYS_INCLUDE}"
            ;;
        *-symbianwinscw)
            dnl TODO: add emulator build code
            OS_TARGET=WINSCW
            ;;
        esac
        ;;
    esac

    AC_CHECK_PROGS(CC, $CC "${target_alias}-gcc" "${target}-gcc", :)
    unset ac_cv_prog_CC
    AC_PROG_CC
    AC_CHECK_PROGS(CXX, $CXX "${target_alias}-g++" "${target}-g++", :)
    unset ac_cv_prog_CXX
    AC_PROG_CXX

    case "$build:$target" in
      powerpc-apple-darwin8*:i?86-apple-darwin*)
        dnl Revert the changes made above.  From this point on, the target
        dnl compiler will never be used without applying the SDK to CFLAGS
        dnl (see --with-macos-sdk below).
        CFLAGS=$_SAVE_CFLAGS
        CXXFLAGS=$_SAVE_CXXFLAGS
        ;;
    esac

    AC_CHECK_PROGS(RANLIB, $RANLIB "${target_alias}-ranlib" "${target}-ranlib", :)
    AC_CHECK_PROGS(AR, $AR "${target_alias}-ar" "${target}-ar", :)
    MOZ_PATH_PROGS(AS, $AS "${target_alias}-as" "${target}-as", :)
    AC_CHECK_PROGS(LD, $LD "${target_alias}-ld" "${target}-ld", :)
    AC_CHECK_PROGS(STRIP, $STRIP "${target_alias}-strip" "${target}-strip", :)
    AC_CHECK_PROGS(WINDRES, $WINDRES "${target_alias}-windres" "${target}-windres", :)
    AC_DEFINE(CROSS_COMPILE)

    dnl If we cross compile for ppc on Mac OS X x86, cross_compiling will
    dnl have erroneously been set to "no", because the x86 build host is
    dnl able to run ppc code in a translated environment, making a cross
    dnl compiler appear native.  So we override that here.
    cross_compiling=yes
else
    AC_PROG_CC
    AC_PROG_CXX
    AC_PROG_RANLIB
    MOZ_PATH_PROGS(AS, $AS as, $CC)
    AC_CHECK_PROGS(AR, ar, :)
    AC_CHECK_PROGS(LD, ld, :)
    AC_CHECK_PROGS(STRIP, strip, :)
    AC_CHECK_PROGS(WINDRES, windres, :)
    if test -z "$HOST_CC"; then
        HOST_CC='$(CC)'
    fi
    if test -z "$HOST_CFLAGS"; then
        HOST_CFLAGS='$(CFLAGS)'
    fi
    if test -z "$HOST_CXX"; then
        HOST_CXX='$(CXX)'
    fi
    if test -z "$HOST_CXXFLAGS"; then
        HOST_CXXFLAGS='$(CXXFLAGS)'
    fi
    if test -z "$HOST_LDFLAGS"; then
        HOST_LDFLAGS='$(LDFLAGS)'
    fi
    if test -z "$HOST_RANLIB"; then
        HOST_RANLIB='$(RANLIB)'
    fi
    if test -z "$HOST_AR"; then
        HOST_AR='$(AR)'
    fi
    if test -z "$HOST_AR_FLAGS"; then
        HOST_AR_FLAGS='$(AR_FLAGS)'
    fi
fi

GNU_AS=
GNU_LD=
GNU_CC=
GNU_CXX=
CC_VERSION='N/A'
CXX_VERSION='N/A'
if test "$GCC" = "yes"; then
    GNU_CC=1
    CC_VERSION=`$CC -v 2>&1 | grep 'gcc version'`
fi
if test "$GXX" = "yes"; then
    GNU_CXX=1
    CXX_VERSION=`$CXX -v 2>&1 | grep 'gcc version'`
fi
if test "`echo | $AS -v 2>&1 | grep -c GNU`" != "0"; then
    GNU_AS=1
fi
if test "`echo | $LD -v 2>&1 | grep -c GNU`" != "0"; then
    GNU_LD=1
fi
if test "$GNU_CC"; then
    if `$CC -print-prog-name=ld` -v 2>&1 | grep -c GNU >/dev/null; then
        GCC_USE_GNU_LD=1
    fi
fi

INTEL_CC=
INTEL_CXX=
if test "$GCC" = yes; then
   if test "`$CC -help 2>&1 | grep -c 'Intel(R) C++ Compiler'`" != "0"; then
     INTEL_CC=1
   fi
fi

if test "$GXX" = yes; then
   if test "`$CXX -help 2>&1 | grep -c 'Intel(R) C++ Compiler'`" != "0"; then
     INTEL_CXX=1
   fi
fi

CLANG_CC=
CLANG_CXX=
if test "$GCC" = yes; then
   if test "`$CC -v 2>&1 | grep -c 'clang version'`" != "0"; then
     CLANG_CC=1
   fi
fi

if test "$GXX" = yes; then
   if test "`$CXX -v 2>&1 | grep -c 'clang version'`" != "0"; then
     CLANG_CXX=1
   fi
fi

dnl Special win32 checks
dnl ========================================================
WINVER=502
dnl Target the Windows 7 SDK by default
WINSDK_TARGETVER=601

MOZ_ARG_WITH_STRING(windows-version,
[  --with-windows-version=WINSDK_TARGETVER
                          Highest Windows version to target using this SDK
                              502: Windows Server 2003
                              600: Windows Vista
                              601: Windows 7],
  WINSDK_TARGETVER=$withval)

case "$WINSDK_TARGETVER" in
502|600|601)
    MOZ_WINSDK_TARGETVER=0${WINSDK_TARGETVER}0000
    ;;

*)
    AC_MSG_ERROR([Invalid value for --with-windows-version ($WINSDK_TARGETVER), must be 502, 600 or 601]);
    ;;

esac

case "$target" in
*-mingw*)
    if test "$GCC" != "yes"; then
        # Check to see if we are really running in a msvc environemnt
        _WIN32_MSVC=1

        # Make sure compilers are valid
        CFLAGS="$CFLAGS -TC -nologo"
        CXXFLAGS="$CXXFLAGS -TP -nologo"
        # MSVC warning C4345 warns of newly conformant behavior as of VS2003.
        # _CRT_SECURE_NO_WARNINGS disables warnings about using MSVC-specific
        # secure CRT functions.
        CXXFLAGS="$CXXFLAGS -wd4345 -D_CRT_SECURE_NO_WARNINGS"
        AC_LANG_SAVE
        AC_LANG_C
        AC_TRY_COMPILE([#include <stdio.h>],
            [ printf("Hello World\n"); ],,
            AC_MSG_ERROR([\$(CC) test failed.  You must have MS VC++ in your path to build.]) )

        AC_LANG_CPLUSPLUS
        AC_TRY_COMPILE([#include <new.h>],
            [ unsigned *test = new unsigned(42); ],,
            AC_MSG_ERROR([\$(CXX) test failed.  You must have MS VC++ in your path to build.]) )
        AC_LANG_RESTORE

        changequote(,)
        _MSVC_VER_FILTER='s|.* ([0-9]+\.[0-9]+\.[0-9]+(\.[0-9]+)?).*|\1|p'
        changequote([,])

        # Determine compiler version
        CC_VERSION=`"${CC}" -v 2>&1 | sed -nre "$_MSVC_VER_FILTER"`
        _CC_MAJOR_VERSION=`echo ${CC_VERSION} | $AWK -F\. '{ print $1 }'`
        _CC_MINOR_VERSION=`echo ${CC_VERSION} | $AWK -F\. '{ print $2 }'`
        _CC_RELEASE=`echo ${CC_VERSION} | $AWK -F\. '{ print $3 }'`
        _CC_BUILD=`echo ${CC_VERSION} | $AWK -F\. '{ print $4 }'`
        _MSC_VER=${_CC_MAJOR_VERSION}${_CC_MINOR_VERSION}

        CXX_VERSION=`"${CXX}" -v 2>&1 | sed -nre "$_MSVC_VER_FILTER"`
        _CXX_MAJOR_VERSION=`echo ${CXX_VERSION} | $AWK -F\. '{ print $1 }'`

        if test "$_CC_MAJOR_VERSION" != "$_CXX_MAJOR_VERSION"; then
            AC_MSG_ERROR([The major versions of \$CC and \$CXX do not match.])
        fi

        if test "$_CC_MAJOR_VERSION" = "14"; then
            dnl Require VC8SP1 or newer.
            dnl VC8 is 14.00.50727.42, VC8SP1 is 14.00.50727.762.
            if test "$_CC_RELEASE" -lt 50727 -o \
                    \( "$_CC_RELEASE" -eq 50727 -a "$_CC_BUILD" -lt 762 \); then
              AC_MSG_ERROR([This version ($CC_VERSION) of the MSVC compiler is unsupported. You probably need to install Service Pack 1 of Visual Studio 2005. See https://developer.mozilla.org/en/Windows_Build_Prerequisites.])
            fi

            _CC_SUITE=8
            AC_DEFINE(_CRT_SECURE_NO_DEPRECATE)
            AC_DEFINE(_CRT_NONSTDC_NO_DEPRECATE)
        elif test "$_CC_MAJOR_VERSION" = "15"; then
            _CC_SUITE=9
            AC_DEFINE(_CRT_SECURE_NO_WARNINGS)
            AC_DEFINE(_CRT_NONSTDC_NO_WARNINGS)
        elif test "$_CC_MAJOR_VERSION" = "16"; then
            _CC_SUITE=10
            AC_DEFINE(_CRT_SECURE_NO_WARNINGS)
            AC_DEFINE(_CRT_NONSTDC_NO_WARNINGS)
        else
            AC_MSG_ERROR([This version ($CC_VERSION) of the MSVC compiler is unsupported. See https://developer.mozilla.org/en/Windows_Build_Prerequisites.])
        fi

        _MOZ_RTTI_FLAGS_ON='-GR'
        _MOZ_RTTI_FLAGS_OFF='-GR-'
        _MOZ_EXCEPTIONS_FLAGS_ON='-EHsc'
        _MOZ_EXCEPTIONS_FLAGS_OFF=''

        dnl Ensure that mt.exe is 'Microsoft (R) Manifest Tool',
        dnl not something else like "magnetic tape manipulation utility".
        MSMT_TOOL=`mt 2>&1|grep 'Microsoft (R) Manifest Tool'`
        if test -z "$MSMT_TOOL"; then
          AC_MSG_ERROR([Microsoft (R) Manifest Tool must be in your \$PATH.])
        fi

        changequote(,)
        _MSMT_VER_FILTER='s|.* \([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*|\1|p'
        changequote([,])
        MSMANIFEST_TOOL_VERSION=`echo ${MSMT_TOOL}|sed -ne "$_MSMT_VER_FILTER"`
        if test -z "$MSMANIFEST_TOOL_VERSION"; then
          AC_MSG_WARN([Unknown version of the Microsoft (R) Manifest Tool.])
        fi

        MSMANIFEST_TOOL=1
        unset MSMT_TOOL

        # Check linker version
        _LD_FULL_VERSION=`"${LD}" -v 2>&1 | sed -nre "$_MSVC_VER_FILTER"`
        _LD_MAJOR_VERSION=`echo ${_LD_FULL_VERSION} | $AWK -F\. '{ print $1 }'`
        if test "$_LD_MAJOR_VERSION" != "$_CC_SUITE"; then
            AC_MSG_ERROR([The linker major version, $_LD_FULL_VERSION,  does not match the compiler suite version, $_CC_SUITE.])
        fi

        INCREMENTAL_LINKER=1

        # Identify which version of the SDK we're building with
        # Windows Server 2008 and newer SDKs have WinSDKVer.h, get the version
        # from there
        AC_CHECK_HEADERS([winsdkver.h])
        if test "$ac_cv_header_winsdkver_h" = "yes"; then
            # Get the highest _WIN32_WINNT and NTDDI versions supported
            # Take the higher of the two
            # This is done because the Windows 7 beta SDK reports its
            # NTDDI_MAXVER to be 0x06000100 instead of 0x06010000, as it should
            AC_CACHE_CHECK(for highest Windows version supported by this SDK,
                           ac_cv_winsdk_maxver,
                           [cat > conftest.h <<EOF
#include <winsdkver.h>
#include <sdkddkver.h>

#if (NTDDI_VERSION_FROM_WIN32_WINNT(_WIN32_WINNT_MAXVER) > NTDDI_MAXVER)
#define WINSDK_MAXVER NTDDI_VERSION_FROM_WIN32_WINNT(_WIN32_WINNT_MAXVER)
#else
#define WINSDK_MAXVER NTDDI_MAXVER
#endif

WINSDK_MAXVER
EOF
                            ac_cv_winsdk_maxver=`$CPP conftest.h 2>/dev/null | tail -n1`
                            rm -f conftest.h
                           ])
            MOZ_WINSDK_MAXVER=${ac_cv_winsdk_maxver}
        else
            # The Vista SDK is the only one to have sdkddkver.h but not
            # WinSDKVer.h
            AC_CHECK_HEADERS([sdkddkver.h])
            if test "$ac_cv_header_sdkddkver_h" = "yes"; then
                MOZ_WINSDK_MAXVER=0x06000000
            else
                # Assume the Server 2003 Platform SDK
                MOZ_WINSDK_MAXVER=0x05020000
            fi
        fi

        unset _MSVC_VER_FILTER

        AC_CACHE_CHECK(for std::_Throw, ac_cv_have_std__Throw,
            [
                AC_LANG_SAVE
                AC_LANG_CPLUSPLUS
                _SAVE_CXXFLAGS="$CXXFLAGS"
                CXXFLAGS="${CXXFLAGS} -D_HAS_EXCEPTIONS=0"
                AC_TRY_COMPILE([#include <exception>],
                            [std::_Throw(std::exception()); return 0;],
                            ac_cv_have_std__Throw="yes",
                            ac_cv_have_std__Throw="no")
                CXXFLAGS="$_SAVE_CXXFLAGS"
                AC_LANG_RESTORE
            ])

        if test "$ac_cv_have_std__Throw" == "yes"; then
            AC_CACHE_CHECK(for |class __declspec(dllimport) exception| bug,
                           ac_cv_have_dllimport_exception_bug,
                [
                    AC_LANG_SAVE
                    AC_LANG_CPLUSPLUS
                    _SAVE_CXXFLAGS="$CXXFLAGS"
                    CXXFLAGS="${CXXFLAGS} -D_HAS_EXCEPTIONS=0"
                    AC_TRY_LINK([#include <vector>],
                                [std::vector<int> v; return v.at(1);],
                                ac_cv_have_dllimport_exception_bug="no",
                                ac_cv_have_dllimport_exception_bug="yes")
                    CXXFLAGS="$_SAVE_CXXFLAGS"
                    AC_LANG_RESTORE
                ])
            if test "$ac_cv_have_dllimport_exception_bug" = "no"; then
                WRAP_STL_INCLUDES=1
                MOZ_MSVC_STL_WRAP__Throw=1
                AC_DEFINE(MOZ_MSVC_STL_WRAP__Throw)
            fi
        else
            AC_CACHE_CHECK(for overridable _RAISE,
                           ac_cv_have__RAISE,
                [
                    AC_LANG_SAVE
                    AC_LANG_CPLUSPLUS
                    _SAVE_CXXFLAGS="$CXXFLAGS"
                    CXXFLAGS="${CXXFLAGS} -D_HAS_EXCEPTIONS=0"
                    AC_TRY_COMPILE([#include <xstddef>
                                    #undef _RAISE
                                    #define _RAISE(x) externallyDefinedFunction((x).what())
                                    #include <vector>
                                   ],
                                   [std::vector<int> v; return v.at(1);],
                                   ac_cv_have__RAISE="no",
                                   ac_cv_have__RAISE="yes")
                    CXXFLAGS="$_SAVE_CXXFLAGS"
                    AC_LANG_RESTORE
                ])
            if test "$ac_cv_have__RAISE" = "yes"; then
                WRAP_STL_INCLUDES=1
                MOZ_MSVC_STL_WRAP__RAISE=1
                AC_DEFINE(MOZ_MSVC_STL_WRAP__RAISE)
            else
                AC_MSG_ERROR([Gecko exception wrapping doesn't understand your your MSVC/SDK.  Please file a bug describing this error and your build configuration.])
            fi
        fi

        if test "$WRAP_STL_INCLUDES" = "1"; then
            STL_FLAGS='-D_HAS_EXCEPTIONS=0 -I$(DIST)/stl_wrappers'
        fi
    else
        # Check w32api version
        _W32API_MAJOR_VERSION=`echo $W32API_VERSION | $AWK -F\. '{ print $1 }'`
        _W32API_MINOR_VERSION=`echo $W32API_VERSION | $AWK -F\. '{ print $2 }'`
        AC_MSG_CHECKING([for w32api version >= $W32API_VERSION])
        AC_TRY_COMPILE([#include <w32api.h>],
            #if (__W32API_MAJOR_VERSION < $_W32API_MAJOR_VERSION) || \
                (__W32API_MAJOR_VERSION == $_W32API_MAJOR_VERSION && \
                 __W32API_MINOR_VERSION < $_W32API_MINOR_VERSION)
                #error "test failed."
            #endif
            , [ res=yes ], [ res=no ])
        AC_MSG_RESULT([$res])
        if test "$res" != "yes"; then
            AC_MSG_ERROR([w32api version $W32API_VERSION or higher required.])
        fi
        # Check windres version
        AC_MSG_CHECKING([for windres version >= $WINDRES_VERSION])
        _WINDRES_VERSION=`${WINDRES} --version 2>&1 | grep -i windres 2>/dev/null | $AWK '{ print $3 }'`
        AC_MSG_RESULT([$_WINDRES_VERSION])
        _WINDRES_MAJOR_VERSION=`echo $_WINDRES_VERSION | $AWK -F\. '{ print $1 }'`
        _WINDRES_MINOR_VERSION=`echo $_WINDRES_VERSION | $AWK -F\. '{ print $2 }'`
        _WINDRES_RELEASE_VERSION=`echo $_WINDRES_VERSION | $AWK -F\. '{ print $3 }'`
        WINDRES_MAJOR_VERSION=`echo $WINDRES_VERSION | $AWK -F\. '{ print $1 }'`
        WINDRES_MINOR_VERSION=`echo $WINDRES_VERSION | $AWK -F\. '{ print $2 }'`
        WINDRES_RELEASE_VERSION=`echo $WINDRES_VERSION | $AWK -F\. '{ print $3 }'`
        if test "$_WINDRES_MAJOR_VERSION" -lt "$WINDRES_MAJOR_VERSION" -o \
                "$_WINDRES_MAJOR_VERSION" -eq "$WINDRES_MAJOR_VERSION" -a \
                "$_WINDRES_MINOR_VERSION" -lt "$WINDRES_MINOR_VERSION" -o \
                "$_WINDRES_MAJOR_VERSION" -eq "$WINDRES_MAJOR_VERSION" -a \
                "$_WINDRES_MINOR_VERSION" -eq "$WINDRES_MINOR_VERSION" -a \
                "$_WINDRES_RELEASE_VERSION" -lt "$WINDRES_RELEASE_VERSION"
        then
            AC_MSG_ERROR([windres version $WINDRES_VERSION or higher is required to build.])
        fi

        MOZ_WINSDK_MAXVER=0x06010000
    fi # !GNU_CC

    AC_DEFINE_UNQUOTED(WINVER,0x$WINVER)
    AC_DEFINE_UNQUOTED(_WIN32_WINNT,0x$WINVER)
    # Require OS features provided by IE 5.0
    AC_DEFINE_UNQUOTED(_WIN32_IE,0x0500)

    # If the maximum version supported by this SDK is lower than the target
    # version, error out
    AC_MSG_CHECKING([for Windows SDK being recent enough])
    if $PERL -e "exit(0x$MOZ_WINSDK_TARGETVER > $MOZ_WINSDK_MAXVER)"; then
        AC_MSG_RESULT("yes")
    else
        AC_MSG_RESULT("no")
        AC_MSG_ERROR([You are targeting Windows version 0x$MOZ_WINSDK_TARGETVER, but your SDK only supports up to version $MOZ_WINSDK_MAXVER. Install and use an updated SDK, or target a lower version using --with-windows-version. Alternatively, try running the Windows SDK Configuration Tool and selecting a newer SDK. See https://developer.mozilla.org/En/Windows_SDK_versions for more details on fixing this.])
    fi

    AC_DEFINE_UNQUOTED(MOZ_WINSDK_TARGETVER,0x$MOZ_WINSDK_TARGETVER)
    # Definitions matching sdkddkver.h
    AC_DEFINE_UNQUOTED(MOZ_NTDDI_WS03, 0x05020000)
    AC_DEFINE_UNQUOTED(MOZ_NTDDI_LONGHORN, 0x06000000)
    AC_DEFINE_UNQUOTED(MOZ_NTDDI_WIN7, 0x06010000)
    ;;
esac

AC_PROG_CPP
AC_PROG_CXXCPP

if test -n "$_WIN32_MSVC"; then
    SKIP_PATH_CHECKS=1
    SKIP_COMPILER_CHECKS=1
    SKIP_LIBRARY_CHECKS=1

    # Since we're skipping compiler and library checks, hard-code
    # some facts here.

    # Common to all MSVC environments:

    # Windows lacks <stdint.h>, but has __int8, and so on.
    AC_DEFINE(JS_HAVE___INTN)
    AC_DEFINE(HAVE_LOCALECONV)
    AC_DEFINE(HAVE_SYSTEMTIMETOFILETIME)
    AC_DEFINE(HAVE_GETSYSTEMTIMEASFILETIME)

    # Windows <stddef.h> defines intptr_t and uintptr_t.
    # VS2005: http://msdn.microsoft.com/en-us/library/323b6b3k(VS.80).aspx
    # VS2008: http://msdn.microsoft.com/en-us/library/323b6b3k.aspx
    AC_DEFINE(JS_STDDEF_H_HAS_INTPTR_T)
fi

fi # COMPILE_ENVIRONMENT

if test "$cross_compiling"  = "yes"; then
    CROSS_COMPILE=1
else
    CROSS_COMPILE=
fi

# Check to see if we are running in a broken QEMU scratchbox.
# We know that anything below 1.0.16 is broken.
AC_CHECK_PROGS(SBCONF, sb-conf ve, "")
if test -n "$SBCONF"; then
    _sb_version=`$SBCONF ve`
    _sb_version_major=`echo $_sb_version | cut -f1 -d.`
    _sb_version_minor=`echo $_sb_version | cut -f2 -d.`
    _sb_version_point=`echo $_sb_version | cut -f3 -d.`
    if test $_sb_version_major -eq 1 -a $_sb_version_minor -eq 0 -a $_sb_version_point -le 16; then
        QEMU_CANT_RUN_JS_SHELL=1
    fi
fi
AC_SUBST(QEMU_CANT_RUN_JS_SHELL)

AC_SUBST(_MSC_VER)

AC_SUBST(GNU_AS)
AC_SUBST(GNU_LD)
AC_SUBST(GNU_CC)
AC_SUBST(GNU_CXX)
AC_SUBST(INTEL_CC)
AC_SUBST(INTEL_CXX)

AC_SUBST(STL_FLAGS)
AC_SUBST(WRAP_STL_INCLUDES)
AC_SUBST(MOZ_MSVC_STL_WRAP__Throw)
AC_SUBST(MOZ_MSVC_STL_WRAP__RAISE)

dnl ========================================================
dnl Checks for programs.
dnl ========================================================
AC_PROG_INSTALL
AC_PROG_LN_S

if test -z "$TINDERBOX_SKIP_PERL_VERSION_CHECK"; then
AC_MSG_CHECKING([for minimum required perl version >= $PERL_VERSION])
_perl_version=`PERL_VERSION=$PERL_VERSION $PERL -e 'print "$]"; if ($] >= $ENV{PERL_VERSION}) { exit(0); } else { exit(1); }' 2>&5`
_perl_res=$?
AC_MSG_RESULT([$_perl_version])

if test "$_perl_res" != 0; then
    AC_MSG_ERROR([Perl $PERL_VERSION or higher is required.])
fi
fi

AC_MSG_CHECKING([for full perl installation])
_perl_archlib=`$PERL -e 'use Config; if ( -d $Config{archlib} ) { exit(0); } else { exit(1); }' 2>&5`
_perl_res=$?
if test "$_perl_res" != 0; then
    AC_MSG_RESULT([no])
    AC_MSG_ERROR([Cannot find Config.pm or \$Config{archlib}.  A full perl installation is required.])
else
    AC_MSG_RESULT([yes])
fi

MOZ_PATH_PROGS(PYTHON, $PYTHON python2.7 python2.6 python2.5 python)
if test -z "$PYTHON"; then
    AC_MSG_ERROR([python was not found in \$PATH])
fi

if test -z "$COMPILE_ENVIRONMENT"; then
    NSINSTALL_BIN='$(PYTHON) $(topsrcdir)/config/nsinstall.py'
fi
AC_SUBST(NSINSTALL_BIN)

MOZ_PATH_PROG(DOXYGEN, doxygen, :)
MOZ_PATH_PROG(AUTOCONF, autoconf, :)
MOZ_PATH_PROG(SYSTEM_MAKEDEPEND, makedepend)
MOZ_PATH_PROG(XARGS, xargs)
if test -z "$XARGS" -o "$XARGS" = ":"; then
    AC_MSG_ERROR([xargs not found in \$PATH .])
fi

if test "$COMPILE_ENVIRONMENT"; then

dnl ========================================================
dnl = Mac OS X toolchain support
dnl ========================================================

case "$target_os" in
darwin*)
    dnl Current known valid versions for GCC_VERSION are 2.95.2 3.1 3.3 4.0.
    dnl 4.0 identifies itself as 4.0.x, so strip the decidecimal for
    dnl the environment and includedir purposes (when using an SDK, below),
    dnl but remember the full version number for the libdir (SDK).
    changequote(,)
    GCC_VERSION_FULL=`echo $CXX_VERSION | $PERL -pe 's/^.*gcc version ([^ ]*).*/$1/'`
    GCC_VERSION=`echo $GCC_VERSION_FULL | $PERL -pe '(split(/\./))[0]>=4&&s/(^\d*\.\d*).*/$1/;'`
    changequote([,])
    if test "$GCC_VERSION_FULL" = "4.0.0" ; then
        dnl Bug 280479, but this keeps popping up in bug 292530 too because
        dnl 4.0.0/4061 is the default compiler in Tiger.
        changequote(,)
        GCC_BUILD=`echo $CXX_VERSION | $PERL -pe 's/^.*build ([^ )]*).*/$1/'`
        changequote([,])
        if test "$GCC_BUILD" = "4061" ; then
            AC_MSG_ERROR([You are attempting to use Apple gcc 4.0 build 4061.
This compiler was supplied with Xcode 2.0, and contains bugs that prevent it
from building Mozilla. Upgrade to Xcode 2.1 or later.])
        fi
    fi

    dnl xcodebuild needs GCC_VERSION defined in the environment, since it
    dnl doesn't respect the CC/CXX setting.  With GCC_VERSION set, it will use
    dnl /usr/bin/g(cc|++)-$GCC_VERSION.
    MOZ_PATH_PROGS(PBBUILD, pbbuild xcodebuild pbxbuild)

    dnl sdp was formerly in /Developer/Tools.  As of Mac OS X 10.4 (Darwin 8),
    dnl it has moved into /usr/bin.
    MOZ_PATH_PROG(SDP, sdp, :, [$PATH:/usr/bin:/Developer/Tools])
    ;;
esac

AC_SUBST(GCC_VERSION)

dnl The universal machinery sets UNIVERSAL_BINARY to inform packager.mk
dnl that a universal binary is being produced.
AC_SUBST(UNIVERSAL_BINARY)

dnl ========================================================
dnl Check for MacOS deployment target version
dnl ========================================================

MOZ_ARG_ENABLE_STRING(macos-target,
                      [  --enable-macos-target=VER (default=10.5)
                          Set the minimum MacOS version needed at runtime],
                      [_MACOSX_DEPLOYMENT_TARGET=$enableval])

if test "$target_cpu" != "arm"; then
case "$target" in
*-darwin*)
    if test -n "$_MACOSX_DEPLOYMENT_TARGET" ; then
        dnl Use the specified value
        export MACOSX_DEPLOYMENT_TARGET=$_MACOSX_DEPLOYMENT_TARGET
    else
        dnl No value specified on the command line or in the environment,
        dnl use architecture minimum.
        case "${target_cpu}" in
          ppc*)
            export MACOSX_DEPLOYMENT_TARGET=10.5
            ;;
          i*86)
            export MACOSX_DEPLOYMENT_TARGET=10.5
            ;;
          x86_64)
            export MACOSX_DEPLOYMENT_TARGET=10.6
            ;;
        esac
    fi
    ;;
esac
fi

AC_SUBST(MACOSX_DEPLOYMENT_TARGET)

dnl ========================================================
dnl = Mac OS X SDK support
dnl ========================================================
MACOS_SDK_DIR=
NEXT_ROOT=
MOZ_ARG_WITH_STRING(macos-sdk,
[  --with-macos-sdk=dir    Location of platform SDK to use (Mac OS X only)],
    MACOS_SDK_DIR=$withval)

dnl MACOS_SDK_DIR will be set to the SDK location whenever one is in use.
dnl NEXT_ROOT will be set and exported only if it's needed.
AC_SUBST(MACOS_SDK_DIR)
AC_SUBST(NEXT_ROOT)

if test "$MACOS_SDK_DIR"; then
  dnl Sync this section with the ones in NSPR and NSS.
  dnl Changes to the cross environment here need to be accounted for in
  dnl the libIDL checks (below) and xpidl build.

  if test ! -d "$MACOS_SDK_DIR"; then
    AC_MSG_ERROR([SDK not found.  When using --with-macos-sdk, you must
specify a valid SDK.  SDKs are installed when the optional cross-development
tools are selected during the Xcode/Developer Tools installation.])
  fi

  GCC_VERSION_MAJOR=`echo $GCC_VERSION_FULL | $PERL -pe 's/(^\d*).*/$1/;'`
  if test "$GCC_VERSION_MAJOR" -lt "4" ; then
    AC_MSG_ERROR([You need to upgrade the compiler version to 4.x])
  else
    CFLAGS="$CFLAGS -isysroot ${MACOS_SDK_DIR}"
    CXXFLAGS="$CXXFLAGS -isysroot ${MACOS_SDK_DIR}"

    dnl CPP/CXXCPP needs to be set for AC_CHECK_HEADER.
    CPP="$CPP -isysroot ${MACOS_SDK_DIR}"
    CXXCPP="$CXXCPP -isysroot ${MACOS_SDK_DIR}"

    if test "$GCC_VERSION_FULL" = "4.0.0" ; then
      dnl If gcc >= 4.0, we're guaranteed to be on Tiger, which has an ld
      dnl that supports -syslibroot.  Don't set NEXT_ROOT because it will
      dnl be ignored and cause warnings when -syslibroot is specified.
      dnl gcc 4.0.1 will pass -syslibroot to ld automatically based on
      dnl the -isysroot it receives, so this is only needed with 4.0.0.
      LDFLAGS="$LDFLAGS -Wl,-syslibroot,${MACOS_SDK_DIR}"
    fi
  fi

  AC_LANG_SAVE
  AC_MSG_CHECKING([for valid compiler/Mac OS X SDK combination])
  AC_LANG_CPLUSPLUS
  AC_TRY_COMPILE([#include <new>
                 int main() { return 0; }],
   result=yes,
   result=no)
  AC_LANG_RESTORE
  AC_MSG_RESULT($result)

  if test "$result" = "no" ; then
    AC_MSG_ERROR([The selected compiler and Mac OS X SDK are incompatible.])
  fi
fi

fi # COMPILE_ENVIRONMENT

if test -n "$MAKE"; then
  if test `echo $MAKE | grep -c make.py` != 1; then
     NOT_PYMAKE=$MAKE
  fi
fi

case "$host_os" in
mingw*)
    MOZ_PATH_PROGS(GMAKE, $GMAKE $NOT_PYMAKE make gmake, :)
    ;;
*)
    MOZ_PATH_PROGS(GMAKE, $GMAKE $NOT_PYMAKE gmake make, :)
    ;;
esac
if test "$GMAKE" = ":"; then
   AC_MSG_ERROR([GNU make not found])
fi
AC_SUBST(GMAKE)

if test "$COMPILE_ENVIRONMENT"; then

AC_PATH_XTRA

XCFLAGS="$X_CFLAGS"

fi # COMPILE_ENVIRONMENT

dnl ========================================================
dnl set the defaults first
dnl ========================================================
AS_BIN=$AS
AR_LIST='$(AR) t'
AR_EXTRACT='$(AR) x'
AR_DELETE='$(AR) d'
AS='$(CC)'
AS_DASH_C_FLAG='-c'
DLL_PREFIX=lib
LIB_PREFIX=lib
DLL_SUFFIX=.so
OBJ_SUFFIX=o
LIB_SUFFIX=a
ASM_SUFFIX=s
IMPORT_LIB_SUFFIX=
TARGET_MD_ARCH=unix
DIRENT_INO=d_ino
WIN_TOP_SRC=
MOZ_USER_DIR=".mozilla"

MOZ_JS_LIBS='-L$(libdir) -lmozjs'
MOZ_FIX_LINK_PATHS='-Wl,-rpath-link,$(LIBXUL_DIST)/bin -Wl,-rpath-link,$(prefix)/lib'

MOZ_COMPONENT_NSPR_LIBS='-L$(LIBXUL_DIST)/bin $(NSPR_LIBS)'

USE_DEPENDENT_LIBS=1

_PLATFORM_DEFAULT_TOOLKIT=cairo-gtk2

if test -n "$CROSS_COMPILE"; then
    OS_TARGET="${target_os}"
    OS_ARCH=`echo $target_os | sed -e 's|/|_|g'`
    OS_RELEASE=
    case "${target_os}" in
        linux*)       OS_ARCH=Linux OS_TARGET=Linux ;;
        kfreebsd*-gnu) OS_ARCH=GNU_kFreeBSD OS_TARGET=GNU_kFreeBSD ;;
        gnu*)         OS_ARCH=GNU ;;
        solaris*)     OS_ARCH=SunOS OS_RELEASE=5 ;;
        mingw*)       OS_ARCH=WINNT ;;
        darwin*)      OS_ARCH=Darwin OS_TARGET=Darwin ;;
    esac
    case "${target}" in
        *-android*|*-linuxandroid*) OS_ARCH=Linux OS_TARGET=Android ;;
    esac
else
    OS_TARGET=`uname -s`
    OS_ARCH=`uname -s | sed -e 's|/|_|g'`
    OS_RELEASE=`uname -r`
fi

# Before this used `uname -m` when not cross compiling
# but that breaks when you have a 64 bit kernel with a 32 bit userland.
OS_TEST="${target_cpu}"

_COMPILER_PREFIX=

HOST_OS_ARCH=`echo $host_os | sed -e 's|/|_|g'`

#######################################################################
# Master "Core Components" macros for getting the OS target           #
#######################################################################

#
# If OS_TARGET is not specified, it defaults to $(OS_ARCH), i.e., no
# cross-compilation.
#

#
# Define and override various archtecture-specific variables, including
# HOST_OS_ARCH
# OS_ARCH
# OS_TEST
# OS_TARGET
# OS_RELEASE
# OS_MINOR_RELEASE
#

case "$HOST_OS_ARCH" in
mingw*)
    HOST_OS_ARCH=WINNT
    ;;
darwin*)
    HOST_OS_ARCH=Darwin
    ;;
linux*)
    HOST_OS_ARCH=Linux
    ;;
solaris*)
    HOST_OS_ARCH=SunOS
    SOLARIS_SUNPRO_CC=
    SOLARIS_SUNPRO_CXX=
    if test -z "$GNU_CC"; then
        if test "`$CC -V 2>&1 | egrep -c 'Sun.*C '`" != "0"; then
            SOLARIS_SUNPRO_CC=1
       fi
    fi

    if test -z "$GNU_CXX"; then
       if test "`$CXX -V 2>&1 | egrep -c 'Sun.*C\+\+ '`" != "0"; then
           SOLARIS_SUNPRO_CXX=1
       fi
    fi
    AC_SUBST(SOLARIS_SUNPRO_CC)
    AC_SUBST(SOLARIS_SUNPRO_CXX)
    ;;
BSD_386)
    HOST_OS_ARCH=BSD
    ;;
dgux)
    HOST_OS_ARCH=DGUX
    ;;
UNIX_SV)
    if "`cat /etc/bcheckrc | grep -c NCR 2>/dev/null`" != "0"; then
        HOST_OS_ARCH=NCR
    else
        HOST_OS_ARCH=UNIXWARE
    fi
    ;;
ncr)
    HOST_OS_ARCH=NCR
    ;;
UNIX_SYSTEM_V)
    HOST_OS_ARCH=NEC
    ;;
OSF1)
    ;;
OS_2)
    HOST_OS_ARCH=OS2
    ;;
SCO_SV)
    HOST_OS_ARCH=SCOOS
    ;;
SINIX-N | SINIX-Y | SINIX-Z |ReliantUNIX-M)
    HOST_OS_ARCH=SINIX
    ;;
UnixWare)
    HOST_OS_ARCH=UNIXWARE
    ;;
esac

case "$OS_ARCH" in
WINNT)
    if test -z "$CROSS_COMPILE" ; then
        OS_TEST=`uname -p`
    fi
    ;;
Windows_NT)
#
# If uname -s returns "Windows_NT", we assume that we are using
# the uname.exe in MKS toolkit.
#
# The -r option of MKS uname only returns the major version number.
# So we need to use its -v option to get the minor version number.
# Moreover, it doesn't have the -p option, so we need to use uname -m.
#
    OS_ARCH=WINNT
    OS_TARGET=WINNT
    OS_MINOR_RELEASE=`uname -v`
    if test "$OS_MINOR_RELEASE" = "00"; then
        OS_MINOR_RELEASE=0
    fi
    OS_RELEASE="${OS_RELEASE}.${OS_MINOR_RELEASE}"
    ;;
MINGW*_NT*)
#
# If uname -s returns MINGW32_NT-5.1, we assume that we are using
# the uname.exe in the MSYS tools.
#
    OS_RELEASE=`expr $OS_ARCH : '.*NT-\(.*\)'`
    OS_ARCH=WINNT
    OS_TARGET=WINNT
    ;;
AIX)
    OS_RELEASE=`uname -v`.`uname -r`
    OS_TEST=${target_cpu}
    if test -z "$GNU_CC"; then
        if test "`$CC -qversion 2>&1 | egrep -c 'IBM XL'`" != "0"; then
            AIX_IBM_XLC=1
        fi
    fi
    ;;
BSD_386)
    OS_ARCH=BSD
    ;;
dgux)
    OS_ARCH=DGUX
    ;;
UNIX_SV)
    if "`cat /etc/bcheckrc | grep -c NCR 2>/dev/null`" != "0"; then
        OS_ARCH=NCR
    else
        OS_ARCH=UNIXWARE
        OS_RELEASE=`uname -v`
    fi
    ;;
ncr)
    OS_ARCH=NCR
    ;;
UNIX_SYSTEM_V)
    OS_ARCH=NEC
    ;;
OSF1)
    case `uname -v` in
    148)
        OS_RELEASE=V3.2C
        ;;
    564)
        OS_RELEASE=V4.0B
        ;;
    878)
        OS_RELEASE=V4.0D
        ;;
    esac
    ;;
OS_2)
    OS_ARCH=OS2
    OS_TARGET=OS2
    OS_RELEASE=`uname -v`
    ;;
SCO_SV)
    OS_ARCH=SCOOS
    OS_RELEASE=5.0
    ;;
SINIX-N | SINIX-Y | SINIX-Z |ReliantUNIX-M)
    OS_ARCH=SINIX
    OS_TEST=`uname -p`
    ;;
UnixWare)
    OS_ARCH=UNIXWARE
    OS_RELEASE=`uname -v`
    ;;
Darwin)
    case "${target_cpu}" in
    powerpc*)
        OS_TEST=ppc
        ;;
    i*86*)
        OS_TEST=i386
        ;;
    x86_64)
        OS_TEST=x86_64
        ;;
    *)
        if test -z "$CROSS_COMPILE" ; then
            OS_TEST=`uname -p`
        fi
        ;;
    esac
    ;;
esac

if test "$OS_ARCH" = "NCR"; then
    changequote(,)
    OS_RELEASE=`awk '{print $3}' /etc/.relid | sed 's/^\([0-9]\)\(.\)\(..\)\(.*\)$/\2.\3/'`
    changequote([,])
fi

# Only set CPU_ARCH if we recognize the value of OS_TEST

case "$OS_TEST" in
*86 | i86pc)
    CPU_ARCH=x86
    ;;

powerpc64 | ppc64)
    CPU_ARCH=ppc64
    ;;

powerpc | ppc | rs6000)
    CPU_ARCH=ppc
    ;;

Alpha | alpha | ALPHA)
    CPU_ARCH=Alpha
    ;;

s390)
    CPU_ARCH=s390
    ;;

s390x)
    CPU_ARCH=s390x
    ;;

hppa* | parisc)
    CPU_ARCH=hppa
    ;;

sun4u | sparc*)
    CPU_ARCH=sparc
    ;;

x86_64 | ia64)
    CPU_ARCH="$OS_TEST"
    ;;

arm*)
    CPU_ARCH=arm
    ;;

mips|mipsel)
    CPU_ARCH="mips"
    ;;
esac

if test -z "$OS_TARGET"; then
    OS_TARGET=$OS_ARCH
fi
OS_CONFIG="${OS_TARGET}${OS_RELEASE}"

dnl Set INTEL_ARCHITECTURE if we're compiling for x86-32 or x86-64.
dnl ===============================================================
INTEL_ARCHITECTURE=
case "$OS_TEST" in
    x86_64|i?86)
      INTEL_ARCHITECTURE=1
esac

dnl ========================================================
dnl GNU specific defaults
dnl ========================================================
if test "$GNU_CC"; then
    MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-h,$@ -o $@'
    MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-h,$@ -o $@'
    DSO_LDOPTS='-shared'
    if test "$GCC_USE_GNU_LD"; then
        # Don't allow undefined symbols in libraries
        DSO_LDOPTS="$DSO_LDOPTS -Wl,-z,defs"
    fi
    WARNINGS_AS_ERRORS='-Werror'
    DSO_CFLAGS=''
    DSO_PIC_CFLAGS='-fPIC'
    ASFLAGS="$ASFLAGS -fPIC"
    _MOZ_RTTI_FLAGS_ON=${_COMPILER_PREFIX}-frtti
    _MOZ_RTTI_FLAGS_OFF=${_COMPILER_PREFIX}-fno-rtti
    _MOZ_EXCEPTIONS_FLAGS_ON='-fexceptions'
    _MOZ_EXCEPTIONS_FLAGS_OFF='-fno-exceptions'

    # Turn on GNU specific features
    # -Wall - turn on all warnings
    # -pedantic - make compiler warn about non-ANSI stuff, and
    #             be a little bit stricter
    # Warnings slamm took out for now (these were giving more noise than help):
    # -Wbad-function-cast - warns when casting a function to a new return type
    # -Wshadow - removed because it generates more noise than help --pete
    _WARNINGS_CFLAGS="${_WARNINGS_CFLAGS} -Wall -W -Wno-unused -Wpointer-arith"
    if test -z "$INTEL_CC" -a -z "$CLANG_CC"; then
       # Don't use -Wcast-align with ICC or clang
       case "$CPU_ARCH" in
           # And don't use it on hppa, ia64, sparc, arm, since it's noisy there
           hppa | ia64 | sparc | arm)
           ;;
           *)
        _WARNINGS_CFLAGS="${_WARNINGS_CFLAGS} -Wcast-align"
           ;;
       esac
    fi

    dnl Turn pedantic on but disable the warnings for long long
    _PEDANTIC=1

    if test -z "$INTEL_CC"; then
      _WARNINGS_CFLAGS="${_WARNINGS_CFLAGS} -W"
    fi

    _DEFINES_CFLAGS='-include $(DEPTH)/js-confdefs.h -DMOZILLA_CLIENT'
    _USE_CPP_INCLUDE_FLAG=1
elif test "$SOLARIS_SUNPRO_CC"; then
    DSO_CFLAGS=''
    if test "$CPU_ARCH" = "sparc"; then
        # for Sun Studio on Solaris/SPARC
        DSO_PIC_CFLAGS='-xcode=pic32'
    else
        DSO_PIC_CFLAGS='-KPIC'
    fi
    _DEFINES_CFLAGS='$(ACDEFINES) -D_JS_CONFDEFS_H_ -DMOZILLA_CLIENT'
else
    MKSHLIB='$(LD) $(DSO_LDOPTS) -h $@ -o $@'
    MKCSHLIB='$(LD) $(DSO_LDOPTS) -h $@ -o $@'

    DSO_LDOPTS='-shared'
    if test "$GNU_LD"; then
        # Don't allow undefined symbols in libraries
        DSO_LDOPTS="$DSO_LDOPTS -z defs"
    fi

    DSO_CFLAGS=''
    DSO_PIC_CFLAGS='-KPIC'
    _DEFINES_CFLAGS='$(ACDEFINES) -D_JS_CONFDEFS_H_ -DMOZILLA_CLIENT'
fi

if test "$GNU_CXX"; then
    # Turn on GNU specific features
    _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wall -Wpointer-arith -Woverloaded-virtual -Wsynth -Wno-ctor-dtor-privacy -Wno-non-virtual-dtor"
    if test -z "$INTEL_CXX" -a -z "$CLANG_CXX"; then
       # Don't use -Wcast-align with ICC or clang
       case "$CPU_ARCH" in
           # And don't use it on hppa, ia64, sparc, arm, since it's noisy there
           hppa | ia64 | sparc | arm)
           ;;
           *)
        _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Wcast-align"
           ;;
       esac
    fi

    _DEFINES_CXXFLAGS='-DMOZILLA_CLIENT -include $(DEPTH)/js-confdefs.h'
    _USE_CPP_INCLUDE_FLAG=1

    AC_CACHE_CHECK(whether the compiler supports -Wno-invalid-offsetof,
                   ac_has_wno_invalid_offsetof,
        [
            AC_LANG_SAVE
            AC_LANG_CPLUSPLUS
            _SAVE_CXXFLAGS="$CXXFLAGS"
            CXXFLAGS="$CXXFLAGS ${_COMPILER_PREFIX}-Wno-invalid-offsetof"
            AC_TRY_COMPILE([],
                           [return(0);],
                           ac_has_wno_invalid_offsetof="yes",
                           ac_has_wno_invalid_offsetof="no")
            CXXFLAGS="$_SAVE_CXXFLAGS"
            AC_LANG_RESTORE
        ])
    if test "$ac_has_wno_invalid_offsetof" = "yes"; then
        _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} ${_COMPILER_PREFIX}-Wno-invalid-offsetof"
    fi

    AC_CACHE_CHECK(whether the compiler supports -Wno-variadic-macros,
                   ac_has_wno_variadic_macros,
        [
            AC_LANG_SAVE
            AC_LANG_CPLUSPLUS
            _SAVE_CXXFLAGS="$CXXFLAGS"
            CXXFLAGS="$CXXFLAGS ${_COMPILER_PREFIX}-Wno-variadic-macros"
            AC_TRY_COMPILE([],
                           [return(0);],
                           ac_has_wno_variadic_macros="yes",
                           ac_has_wno_variadic_macros="no")
            CXXFLAGS="$_SAVE_CXXFLAGS"
            AC_LANG_RESTORE
        ])
    if test "$ac_has_wno_variadic_macros" = "yes"; then
        _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} ${_COMPILER_PREFIX}-Wno-variadic-macros"
    fi

    AC_CACHE_CHECK(whether the compiler supports -Werror=return-type,
                   ac_has_werror_return_type,
        [
            AC_LANG_SAVE
            AC_LANG_CPLUSPLUS
            _SAVE_CXXFLAGS="$CXXFLAGS"
            CXXFLAGS="$CXXFLAGS -Werror=return-type"
            AC_TRY_COMPILE([],
                           [return(0);],
                           ac_has_werror_return_type="yes",
                           ac_has_werror_return_type="no")
            CXXFLAGS="$_SAVE_CXXFLAGS"
            AC_LANG_RESTORE
        ])
    if test "$ac_has_werror_return_type" = "yes"; then
        _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} -Werror=return-type"
    fi

else
    _DEFINES_CXXFLAGS='-DMOZILLA_CLIENT -D_JS_CONFDEFS_H_ $(ACDEFINES)'
fi

dnl gcc can come with its own linker so it is better to use the pass-thru calls
dnl MKSHLIB_FORCE_ALL is used to force the linker to include all object
dnl files present in an archive. MKSHLIB_UNFORCE_ALL reverts the linker to
dnl normal behavior.
dnl ========================================================
MKSHLIB_FORCE_ALL=
MKSHLIB_UNFORCE_ALL=

if test "$COMPILE_ENVIRONMENT"; then
if test "$GNU_CC"; then
  AC_MSG_CHECKING(whether ld has archive extraction flags)
  AC_CACHE_VAL(ac_cv_mkshlib_force_and_unforce,
   [_SAVE_LDFLAGS=$LDFLAGS; _SAVE_LIBS=$LIBS
    ac_cv_mkshlib_force_and_unforce="no"
    exec 3<&0 <<LOOP_INPUT
	force="-Wl,--whole-archive";   unforce="-Wl,--no-whole-archive"
	force="-Wl,-z -Wl,allextract"; unforce="-Wl,-z -Wl,defaultextract"
	force="-Wl,-all";              unforce="-Wl,-none"
LOOP_INPUT
    while read line
    do
      eval $line
      LDFLAGS=$force
      LIBS=$unforce
      AC_TRY_LINK(,, ac_cv_mkshlib_force_and_unforce=$line; break)
    done
    exec 0<&3 3<&-
    LDFLAGS=$_SAVE_LDFLAGS; LIBS=$_SAVE_LIBS
   ])
  if test "$ac_cv_mkshlib_force_and_unforce" = "no"; then
    AC_MSG_RESULT(no)
  else
    AC_MSG_RESULT(yes)
    eval $ac_cv_mkshlib_force_and_unforce
    MKSHLIB_FORCE_ALL=$force
    MKSHLIB_UNFORCE_ALL=$unforce
  fi
fi # GNU_CC
fi # COMPILE_ENVIRONMENT

dnl =================================================================
dnl Set up and test static assertion macros used to avoid AC_TRY_RUN,
dnl which is bad when cross compiling.
dnl =================================================================
if test "$COMPILE_ENVIRONMENT"; then
configure_static_assert_macros='
#define CONFIGURE_STATIC_ASSERT(condition) CONFIGURE_STATIC_ASSERT_IMPL(condition, __LINE__)
#define CONFIGURE_STATIC_ASSERT_IMPL(condition, line) CONFIGURE_STATIC_ASSERT_IMPL2(condition, line)
#define CONFIGURE_STATIC_ASSERT_IMPL2(condition, line) typedef int static_assert_line_##line[(condition) ? 1 : -1]
'

dnl test that the macros actually work:
AC_MSG_CHECKING(that static assertion macros used in autoconf tests work)
AC_CACHE_VAL(ac_cv_static_assertion_macros_work,
 [AC_LANG_SAVE
  AC_LANG_C
  ac_cv_static_assertion_macros_work="yes"
  AC_TRY_COMPILE([$configure_static_assert_macros],
                 [CONFIGURE_STATIC_ASSERT(1)],
                 ,
                 ac_cv_static_assertion_macros_work="no")
  AC_TRY_COMPILE([$configure_static_assert_macros],
                 [CONFIGURE_STATIC_ASSERT(0)],
                 ac_cv_static_assertion_macros_work="no",
                 )
  AC_LANG_CPLUSPLUS
  AC_TRY_COMPILE([$configure_static_assert_macros],
                 [CONFIGURE_STATIC_ASSERT(1)],
                 ,
                 ac_cv_static_assertion_macros_work="no")
  AC_TRY_COMPILE([$configure_static_assert_macros],
                 [CONFIGURE_STATIC_ASSERT(0)],
                 ac_cv_static_assertion_macros_work="no",
                 )
  AC_LANG_RESTORE
 ])
AC_MSG_RESULT("$ac_cv_static_assertion_macros_work")
if test "$ac_cv_static_assertion_macros_work" = "no"; then
    AC_MSG_ERROR([Compiler cannot compile macros used in autoconf tests.])
fi
fi # COMPILE_ENVIRONMENT

dnl ========================================================
dnl Checking for 64-bit OS
dnl ========================================================
if test "$COMPILE_ENVIRONMENT"; then
AC_LANG_SAVE
AC_LANG_C
AC_MSG_CHECKING(for 64-bit OS)
AC_TRY_COMPILE([$configure_static_assert_macros],
               [CONFIGURE_STATIC_ASSERT(sizeof(void*) == 8)],
               result="yes", result="no")
AC_MSG_RESULT("$result")
if test "$result" = "yes"; then
    AC_DEFINE(HAVE_64BIT_OS)
    HAVE_64BIT_OS=1
fi
AC_SUBST(HAVE_64BIT_OS)
AC_LANG_RESTORE
fi # COMPILE_ENVIRONMENT

dnl ========================================================
dnl Enable high-memory support on OS/2 by default.
dnl ========================================================
MOZ_OS2_HIGH_MEMORY=1
MOZ_ARG_DISABLE_BOOL(os2-high-mem,
[  --disable-os2-high-mem  Disable high-memory support on OS/2],
    MOZ_OS2_HIGH_MEMORY=,
    MOZ_OS2_HIGH_MEMORY=1 )
AC_SUBST(MOZ_OS2_HIGH_MEMORY)

dnl ========================================================
dnl = Use profiling compile flags
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(profiling,
[  --enable-profiling      Set compile flags necessary for using sampling profilers (e.g. shark, perf)],
    MOZ_PROFILING=1,
    MOZ_PROFILING= )

dnl ========================================================
dnl System overrides of the defaults for host
dnl ========================================================
case "$host" in
*mingw*)
    # we need Python 2.5 on Windows
    PYTHON_VERSION=2.5
    if test -n "$_WIN32_MSVC"; then
        HOST_AR=lib
        HOST_AR_FLAGS='-NOLOGO -OUT:"$@"'
        HOST_CFLAGS="$HOST_CFLAGS -TC -nologo -Fd\$(HOST_PDBFILE)"
        HOST_RANLIB='echo ranlib'
    else
        HOST_CFLAGS="$HOST_CFLAGS -mwindows"
    fi
    HOST_CFLAGS="$HOST_CFLAGS -DXP_WIN32 -DXP_WIN -DWIN32 -D_WIN32 -DNO_X11 -D_CRT_SECURE_NO_WARNINGS"
    HOST_NSPR_MDCPUCFG='\"md/_winnt.cfg\"'
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O2}"
    HOST_BIN_SUFFIX=.exe
    case "$host" in
    *mingw*)
        PERL="/bin/sh ${_topsrcdir}/build/msys-perl-wrapper"
        ;;
    esac

    case "${host_cpu}" in
    x86_64)
        HOST_CFLAGS="$HOST_CFLAGS -D_AMD64_"
        ;;
    esac
    ;;

*-darwin*)
    HOST_CFLAGS="$HOST_CFLAGS -DXP_UNIX -DXP_MACOSX -DNO_X11"
    HOST_NSPR_MDCPUCFG='\"md/_darwin.cfg\"'
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O3}"
    ;;

*-linux*|*-kfreebsd*-gnu|*-gnu*)
    HOST_CFLAGS="$HOST_CFLAGS -DXP_UNIX"
    HOST_NSPR_MDCPUCFG='\"md/_linux.cfg\"'
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O3}"
    ;;

*os2*)
    HOST_CFLAGS="$HOST_CFLAGS -DXP_OS2 -DNO_X11 -Zomf"
    HOST_NSPR_MDCPUCFG='\"md/_os2.cfg\"'
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O2}"
    HOST_BIN_SUFFIX=.exe
    MOZ_FIX_LINK_PATHS=
    ;;

*-osf*)
    HOST_CFLAGS="$HOST_CFLAGS -DXP_UNIX"
    HOST_NSPR_MDCPUCFG='\"md/_osf1.cfg\"'
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O2}"
    ;;

*)
    HOST_CFLAGS="$HOST_CFLAGS -DXP_UNIX"
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O2}"
    ;;
esac

dnl We require version 2.4 or newer of Python to build,
dnl and 2.5 or newer on Windows.
AC_MSG_CHECKING([for Python version >= $PYTHON_VERSION but not 3.x])
changequote(,)
$PYTHON -c "import sys; sys.exit(sys.version[:3] < sys.argv[1] or sys.version[:2] != '2.')" $PYTHON_VERSION
_python_res=$?
changequote([,])
if test "$_python_res" != 0; then
    AC_MSG_ERROR([Python $PYTHON_VERSION or higher (but not Python 3.x) is required.])
fi
AC_MSG_RESULT([yes])

MOZ_DOING_LTO(lto_is_enabled)

dnl ========================================================
dnl System overrides of the defaults for target
dnl ========================================================

case "$target" in
*-aix*)
    AC_DEFINE(AIX)
    if test ! "$GNU_CC"; then
        if test ! "$HAVE_64BIT_OS"; then
            # Compiling with Visual Age C++ object model compat is the
            # default. To compile with object model ibm, add
            # AIX_OBJMODEL=ibm to .mozconfig.
            if test "$AIX_OBJMODEL" = "ibm"; then
                CXXFLAGS="$CXXFLAGS -qobjmodel=ibm"
            else
                AIX_OBJMODEL=compat
            fi
        else
            AIX_OBJMODEL=compat
        fi
        AC_SUBST(AIX_OBJMODEL)
        DSO_LDOPTS='-qmkshrobj=1'
        DSO_CFLAGS='-qflag=w:w'
        DSO_PIC_CFLAGS=
        LDFLAGS="$LDFLAGS -Wl,-brtl -blibpath:/usr/lib:/lib"
        MOZ_FIX_LINK_PATHS=
        MKSHLIB='$(CXX) $(DSO_LDOPTS) -o $@'
        MKCSHLIB='$(CC) $(DSO_LDOPTS) -o $@'
        if test "$COMPILE_ENVIRONMENT"; then
            AC_LANG_SAVE
            AC_LANG_CPLUSPLUS
            AC_MSG_CHECKING([for IBM XLC/C++ compiler version >= 9.0.0.7])
            AC_TRY_COMPILE([],
                [#if (__IBMCPP__ < 900)
                 #error "Bad compiler"
                 #endif],
                _BAD_COMPILER=,_BAD_COMPILER=1)
            if test -n "$_BAD_COMPILER"; then
                AC_MSG_RESULT([no])
                AC_MSG_ERROR([IBM XLC/C++ 9.0.0.7 or higher is required to build.])
            else
                AC_MSG_RESULT([yes])
            fi
            AC_LANG_RESTORE
            TARGET_COMPILER_ABI="ibmc"
            CC_VERSION=`lslpp -Lcq vac.C 2>/dev/null | awk -F: '{ print $3 }'`
            CXX_VERSION=`lslpp -Lcq vacpp.cmp.core 2>/dev/null | awk -F: '{ print $3 }'`
        fi
    fi
    case "${target_os}" in
    aix4.1*)
        DLL_SUFFIX='_shr.a'
        ;;
    esac
    if test "$COMPILE_ENVIRONMENT"; then
        AC_CHECK_HEADERS(sys/inttypes.h)
    fi
    AC_DEFINE(JS_SYS_TYPES_H_DEFINES_EXACT_SIZE_TYPES)
    AC_DEFINE(NSCAP_DISABLE_DEBUG_PTR_TYPES)
    ;;

*-bsdi*)
    dnl -pedantic doesn't play well with BSDI's _very_ modified gcc (shlicc2)
    _PEDANTIC=
    case $OS_RELEASE in
	4.*|5.*)
            STRIP="$STRIP -d"
            ;;
	*)
	    DSO_CFLAGS=''
	    DSO_LDOPTS='-r'
	    _WARNINGS_CFLAGS="-Wall"
	    _WARNINGS_CXXFLAGS="-Wall"
	    # The test above doesn't work properly, at least on 3.1.
	    MKSHLIB_FORCE_ALL=''
	    MKSHLIB_UNFORCE_ALL=''
	;;
    esac
    ;;

*-darwin*)
    MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
    MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
    # If we're building with --enable-profiling, we need a frame pointer.
    if test -z "$MOZ_PROFILING"; then
        MOZ_FRAMEPTR_FLAGS="-fomit-frame-pointer"
    else
        MOZ_FRAMEPTR_FLAGS="-fno-omit-frame-pointer"
    fi
    MOZ_OPTIMIZE_FLAGS="-O3 $MOZ_FRAMEPTR_FLAGS -fno-stack-protector"
    _PEDANTIC=
    CFLAGS="$CFLAGS -fpascal-strings -fno-common"
    CXXFLAGS="$CXXFLAGS -fpascal-strings -fno-common"
    DLL_SUFFIX=".dylib"
    DSO_LDOPTS=''
    STRIP="$STRIP -x -S"
    _PLATFORM_DEFAULT_TOOLKIT='cairo-cocoa'
    TARGET_NSPR_MDCPUCFG='\"md/_darwin.cfg\"'
    LDFLAGS="$LDFLAGS -lobjc"
    LIBXUL_LIBS='$(XPCOM_FROZEN_LDOPTS) $(LIBXUL_DIST)/bin/XUL'
    # The ExceptionHandling framework is needed for Objective-C exception
    # logging code in nsObjCExceptions.h. Currently we only use that in debug
    # builds.
    _SAVE_LDFLAGS=$LDFLAGS
     AC_MSG_CHECKING([for -framework ExceptionHandling])
    LDFLAGS="$LDFLAGS -framework ExceptionHandling"
    AC_TRY_LINK(,[return 0;],
                ac_cv_have_framework_exceptionhandling="yes",
                ac_cv_have_framework_exceptionhandling="no")
    AC_MSG_RESULT([$ac_cv_have_framework_exceptionhandling])
    if test  "$ac_cv_have_framework_exceptionhandling" = "yes"; then
      MOZ_DEBUG_LDFLAGS="$MOZ_DEBUG_LDFLAGS -framework ExceptionHandling";
    fi
    LDFLAGS=$_SAVE_LDFLAGS

    if test "x$lto_is_enabled" = "xyes"; then
        echo "Skipping -dead_strip because lto is enabled."
    dnl DTrace and -dead_strip don't interact well. See bug 403132.
    dnl ===================================================================
    elif test "x$enable_dtrace" = "xyes"; then
        echo "Skipping -dead_strip because DTrace is enabled. See bug 403132."
    else
        dnl check for the presence of the -dead_strip linker flag
        AC_MSG_CHECKING([for -dead_strip option to ld])
        _SAVE_LDFLAGS=$LDFLAGS
        LDFLAGS="$LDFLAGS -Wl,-dead_strip"
        AC_TRY_LINK(,[return 0;],_HAVE_DEAD_STRIP=1,_HAVE_DEAD_STRIP=)
        if test -n "$_HAVE_DEAD_STRIP" ; then
            AC_MSG_RESULT([yes])
            MOZ_OPTIMIZE_LDFLAGS="-Wl,-dead_strip"
        else
            AC_MSG_RESULT([no])
        fi

        LDFLAGS=$_SAVE_LDFLAGS
    fi
    MOZ_FIX_LINK_PATHS='-Wl,-executable_path,$(LIBXUL_DIST)/bin'
    ;;

*-freebsd*)
    if test `test -x /usr/bin/objformat && /usr/bin/objformat || echo elf` != "elf"; then
	DLL_SUFFIX=".so.1.0"
	DSO_LDOPTS="-shared"
    fi
    if test ! "$GNU_CC"; then
	DSO_LDOPTS="-Bshareable $DSO_LDOPTS"
    fi
    ;;

ia64*-hpux*)
    DLL_SUFFIX=".so"
    if test ! "$GNU_CC"; then
       DSO_LDOPTS='-b'
       DSO_CFLAGS=""
       DSO_PIC_CFLAGS=
       MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_LDOPTS) -o $@'
       MKCSHLIB='$(CC) $(CFLAGS) $(DSO_LDOPTS) -o $@'
       CXXFLAGS="$CXXFLAGS -Wc,-ansi_for_scope,on"
    else
       DSO_LDOPTS='-b -E'
       MKSHLIB='$(LD) $(DSO_LDOPTS) -o $@'
       MKCSHLIB='$(LD) $(DSO_LDOPTS) -o $@'
    fi
    MOZ_FIX_LINK_PATHS=
    SYSTEM_MAKEDEPEND=
    AC_DEFINE(NSCAP_DISABLE_DEBUG_PTR_TYPES)
    AC_DEFINE(_LARGEFILE64_SOURCE)
    ;;

*-hpux*)
    DLL_SUFFIX=".sl"
    if test ! "$GNU_CC"; then
    	DSO_LDOPTS='-b -Wl,+s'
    	DSO_CFLAGS=""
    	DSO_PIC_CFLAGS="+Z"
    	MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_LDOPTS) -L$(LIBXUL_DIST)/bin -o $@'
    	MKCSHLIB='$(LD) -b +s -L$(LIBXUL_DIST)/bin -o $@'
        CXXFLAGS="$CXXFLAGS -Wc,-ansi_for_scope,on"
    else
        DSO_LDOPTS='-b -E +s'
        MKSHLIB='$(LD) $(DSO_LDOPTS) -L$(LIBXUL_DIST)/bin -L$(LIBXUL_DIST)/lib -o $@'
        MKCSHLIB='$(LD) $(DSO_LDOPTS) -L$(LIBXUL_DIST)/bin -L$(LIBXUL_DIST)/lib -o $@'
    fi
    MOZ_POST_PROGRAM_COMMAND='chatr +s enable'
    AC_DEFINE(NSCAP_DISABLE_DEBUG_PTR_TYPES)
    ;;

*-android*|*-linuxandroid*)
    AC_DEFINE(NO_PW_GECOS)
    no_x=yes
    _PLATFORM_DEFAULT_TOOLKIT=cairo-android
    TARGET_NSPR_MDCPUCFG='\"md/_linux.cfg\"'

    MOZ_GFX_OPTIMIZE_MOBILE=1
    # If we're building with --enable-profiling, we need a frame pointer.
    if test -z "$MOZ_PROFILING"; then
        MOZ_FRAMEPTR_FLAGS="-fomit-frame-pointer"
    else
        MOZ_FRAMEPTR_FLAGS="-fno-omit-frame-pointer"
    fi
    MOZ_OPTIMIZE_FLAGS="-O3 -freorder-blocks -fno-reorder-functions $MOZ_FRAMEPTR_FLAGS"
    # The Maemo builders don't know about this flag
    MOZ_ARM_VFP_FLAGS="-mfpu=vfp"
    ;;

*-*linux*)
    # Note: both GNU_CC and INTEL_CC are set when using Intel's C compiler.
    # Similarly for GNU_CXX and INTEL_CXX.
    if test "$INTEL_CC" -o "$INTEL_CXX"; then
        # -Os has been broken on Intel's C/C++ compilers for quite a
        # while; Intel recommends against using it.
        MOZ_OPTIMIZE_FLAGS="-O2"
        MOZ_DEBUG_FLAGS="-g"
    elif test "$GNU_CC" -o "$GNU_CXX"; then
        GCC_VERSION=`$CC -v 2>&1 | awk '/^gcc version/ { print $3 }'`
        case $GCC_VERSION in
        4.1.*|4.2.*|4.5.*)
            # -Os is broken on gcc 4.1.x 4.2.x, 4.5.x we need to tweak it to get good results.
            MOZ_OPTIMIZE_SIZE_TWEAK="-finline-limit=50"
        esac
        # If we're building with --enable-profiling, we need a frame pointer.
        if test -z "$MOZ_PROFILING"; then
            MOZ_FRAMEPTR_FLAGS="-fomit-frame-pointer"
        else
            MOZ_FRAMEPTR_FLAGS="-fno-omit-frame-pointer"
        fi
        MOZ_PGO_OPTIMIZE_FLAGS="-O3 $MOZ_FRAMEPTR_FLAGS"
        MOZ_OPTIMIZE_FLAGS="-O3 -freorder-blocks $MOZ_OPTIMIZE_SIZE_TWEAK $MOZ_FRAMEPTR_FLAGS"
        MOZ_DEBUG_FLAGS="-g"
    fi

    TARGET_NSPR_MDCPUCFG='\"md/_linux.cfg\"'

    case "${target_cpu}" in
    alpha*)
    	CFLAGS="$CFLAGS -mieee"
    	CXXFLAGS="$CXXFLAGS -mieee"
    ;;
    mips*)
        MOZ_DEBUG_FLAGS="-g" # We want inlining
    ;;
    esac

    if test -z "$MC"; then
        MC=mc.exe
    fi
    ;;
*-symbian*)

    AC_DEFINE(XP_UNIX)
    AC_DEFINE(SYMBIAN)
    AC_DEFINE(__arm__)
    AC_DEFINE(__SYMBIAN32__)
    AC_DEFINE(_UNICODE)
    AC_DEFINE(NDEBUG)
    AC_DEFINE(__SUPPORT_CPP_EXCEPTIONS__)
    AC_DEFINE(MOZ_STDERR_TO_STDOUT)
    AC_DEFINE(HAVE_FCNTL_FILE_LOCKING)
    AC_DEFINE(HAVE_SOCKLEN_T)
    AC_DEFINE(__GCCE__)

    CPU_ARCH=ARM
    OS_RELEASE=9.2
    OS_ARCH=SYMBIAN
    USE_PTHREADS=1
    LIB_SUFFIX=lib
    DLL_SUFFIX=dll
    MKSHLIB=
    DSO_LDOPTS=
    DSO_CFLAGS=
    VISIBILITY_FLAGS=
    TARGET_NSPR_MDCPUCFG='\"md/_symbian.cfg\"'
    RANLIB='echo no ranlib '
;;

*-mingw*)
    DSO_CFLAGS=
    DSO_PIC_CFLAGS=
    DLL_SUFFIX=.dll
    RC=rc.exe
    MC=mc.exe
    # certain versions of cygwin's makedepend barf on the
    # #include <string> vs -I./dist/include/string issue so don't use it
    SYSTEM_MAKEDEPEND=
    if test -n "$GNU_CC"; then
        CC="$CC -mwindows"
        CXX="$CXX -mwindows"
        CPP="$CPP -mwindows"
        CFLAGS="$CFLAGS -mms-bitfields"
        CXXFLAGS="$CXXFLAGS -mms-bitfields"
        DSO_LDOPTS='-shared'
        MKSHLIB='$(CXX) $(DSO_LDOPTS) -o $@'
        MKCSHLIB='$(CC) $(DSO_LDOPTS) -o $@'
        RC='$(WINDRES)'
        # Use temp file for windres (bug 213281)
        RCFLAGS='-O coff --use-temp-file'
        # mingw doesn't require kernel32, user32, and advapi32 explicitly
        LIBS="$LIBS -lgdi32 -lwinmm -lwsock32"
        MOZ_JS_LIBS='-L$(libdir) -lmozjs'
        MOZ_FIX_LINK_PATHS=
        DYNAMIC_XPCOM_LIBS='-L$(LIBXUL_DIST)/lib -lxpcom -lxpcom_core -lmozalloc'
        XPCOM_FROZEN_LDOPTS='-L$(LIBXUL_DIST)/lib -lxpcom -lmozalloc'
        DLL_PREFIX=
        IMPORT_LIB_SUFFIX=dll.a
        GCC_VERSION=`$CC -v 2>&1 | awk '/^gcc version/ { print $3 }'`
    else
        TARGET_COMPILER_ABI=msvc
        HOST_CC='$(CC)'
        HOST_CXX='$(CXX)'
        HOST_LD='$(LD)'
        if test "$AS_BIN"; then
            AS="$(basename "$AS_BIN")"
        fi
        AR='lib'
        AR_FLAGS='-NOLOGO -OUT:"$@"'
        AR_EXTRACT=
        RANLIB='echo not_ranlib'
        STRIP='echo not_strip'
        PKG_SKIP_STRIP=1
        XARGS=xargs
        DOXYGEN=:
        GARBAGE='$(OBJDIR)/vc20.pdb $(OBJDIR)/vc40.pdb'
        ASM_SUFFIX=asm
        OBJ_SUFFIX=obj
        LIB_SUFFIX=lib
        DLL_PREFIX=
        LIB_PREFIX=
        IMPORT_LIB_SUFFIX=lib
        MKSHLIB='$(LD) -NOLOGO -DLL -OUT:$@ -PDB:$(LINK_PDBFILE) $(DSO_LDOPTS)'
        MKCSHLIB='$(LD) -NOLOGO -DLL -OUT:$@ -PDB:$(LINK_PDBFILE) $(DSO_LDOPTS)'
        MKSHLIB_FORCE_ALL=
        MKSHLIB_UNFORCE_ALL=
        DSO_LDOPTS=-SUBSYSTEM:WINDOWS
        _USE_CPP_INCLUDE_FLAG=1
        _DEFINES_CFLAGS='-FI $(DEPTH)/js-confdefs.h -DMOZILLA_CLIENT'
        _DEFINES_CXXFLAGS='-FI $(DEPTH)/js-confdefs.h -DMOZILLA_CLIENT'
        CFLAGS="$CFLAGS -W3 -Gy -Fd\$(COMPILE_PDBFILE)"
        CXXFLAGS="$CXXFLAGS -W3 -Gy -Fd\$(COMPILE_PDBFILE)"
        # MSVC warnings C4244 and C4800 are ubiquitous, useless, and annoying.
        CXXFLAGS="$CXXFLAGS -wd4244 -wd4800"
        # make 'foo == bar;' error out
        CFLAGS="$CFLAGS -we4553"
        CXXFLAGS="$CXXFLAGS -we4553"
        LIBS="$LIBS kernel32.lib user32.lib gdi32.lib winmm.lib wsock32.lib advapi32.lib"
        MOZ_DEBUG_FLAGS='-Zi'
        MOZ_DEBUG_LDFLAGS='-DEBUG -DEBUGTYPE:CV'
        WARNINGS_AS_ERRORS='-WX'
        # If we're building with --enable-profiling, we need -Oy-, which forces a frame pointer.
        if test -z "$MOZ_PROFILING"; then
            MOZ_FRAMEPTR_FLAGS=
        else
            MOZ_FRAMEPTR_FLAGS='-Oy-'
        fi
        MOZ_OPTIMIZE_FLAGS="-O2 $MOZ_FRAMEPTR_FLAGS"
        MOZ_JS_LIBS='$(libdir)/mozjs.lib'
        MOZ_FIX_LINK_PATHS=
        DYNAMIC_XPCOM_LIBS='$(LIBXUL_DIST)/lib/xpcom.lib $(LIBXUL_DIST)/lib/xpcom_core.lib $(LIBXUL_DIST)/lib/mozalloc.lib'
        XPCOM_FROZEN_LDOPTS='$(LIBXUL_DIST)/lib/xpcom.lib $(LIBXUL_DIST)/lib/mozalloc.lib'
        LIBXUL_LIBS='$(LIBXUL_DIST)/lib/xpcom.lib $(LIBXUL_DIST)/lib/xul.lib $(LIBXUL_DIST)/lib/mozalloc.lib'
        MOZ_COMPONENT_NSPR_LIBS='$(NSPR_LIBS)'
        if test $_MSC_VER -ge 1400; then
            LDFLAGS="$LDFLAGS -LARGEADDRESSAWARE -NXCOMPAT"
            dnl For profile-guided optimization
            PROFILE_GEN_CFLAGS="-GL"
            PROFILE_GEN_LDFLAGS="-LTCG:PGINSTRUMENT"
            dnl XXX: PGO builds can fail with warnings treated as errors,
            dnl specifically "no profile data available" appears to be
            dnl treated as an error sometimes. This might be a consequence
            dnl of using WARNINGS_AS_ERRORS in some modules, combined
            dnl with the linker doing most of the work in the whole-program
            dnl optimization/PGO case. I think it's probably a compiler bug,
            dnl but we work around it here.
            PROFILE_USE_CFLAGS="-GL -wd4624 -wd4952"
            dnl XXX: should be -LTCG:PGOPTIMIZE, but that fails on libxul.
            dnl Probably also a compiler bug, but what can you do?
            PROFILE_USE_LDFLAGS="-LTCG:PGUPDATE"
            LDFLAGS="$LDFLAGS -DYNAMICBASE"
        fi
    fi
    AC_DEFINE(HAVE_SNPRINTF)
    AC_DEFINE(_WINDOWS)
    AC_DEFINE(WIN32)
    AC_DEFINE(XP_WIN)
    AC_DEFINE(XP_WIN32)
    AC_DEFINE(HW_THREADS)
    AC_DEFINE(STDC_HEADERS)
    AC_DEFINE(NEW_H, <new>)
    AC_DEFINE(WIN32_LEAN_AND_MEAN)
    TARGET_MD_ARCH=win32
    _PLATFORM_DEFAULT_TOOLKIT='cairo-windows'
    BIN_SUFFIX='.exe'
    MOZ_USER_DIR="Mozilla"

    dnl Hardcode to win95 for now - cls
    TARGET_NSPR_MDCPUCFG='\"md/_win95.cfg\"'

    dnl set NO_X11 defines here as the general check is skipped on win32
    no_x=yes
    AC_DEFINE(NO_X11)

    case "$host" in
    *-mingw*)
        MOZ_BUILD_ROOT=`cd $MOZ_BUILD_ROOT && pwd -W`
        ;;
    esac

    case "$host" in
    *-mingw*)
        if test -z "$MOZ_TOOLS"; then
            AC_MSG_ERROR([MOZ_TOOLS is not set])
        fi
        MOZ_TOOLS_DIR=`cd $MOZ_TOOLS && pwd -W`
        if test "$?" != "0" -o -z "$MOZ_TOOLS_DIR"; then
            AC_MSG_ERROR([cd \$MOZ_TOOLS failed. MOZ_TOOLS ==? $MOZ_TOOLS])
        fi
        MOZ_TOOLS_BIN_DIR="$(cd "$MOZ_TOOLS_DIR/bin" && pwd)"
        if test `echo ${PATH}: | grep -ic "$MOZ_TOOLS_BINDIR:"` = 0; then
            AC_MSG_ERROR([\$MOZ_TOOLS\\bin must be in your path.])
        fi
        ;;
    esac

    case "$host_os" in
    cygwin*|msvc*|mks*)
        AC_MSG_ERROR([Using a Cygwin build environment is unsupported. Configure cannot check for presence of necessary headers. Please upgrade to MozillaBuild; see https://developer.mozilla.org/en/Windows_Build_Prerequisites.])
        ;;
    esac

    case "$target" in
    i*86-*)
        if test "$HAVE_64BIT_OS"; then
            AC_MSG_ERROR([You are targeting i386 but using the 64-bit compiler.])
        fi

        if test $_MSC_VER -ge 1400; then
            LDFLAGS="$LDFLAGS -SAFESEH"
        fi

        if test -n "$GNU_CC"; then
            CFLAGS="$CFLAGS -mstackrealign"
            CXXFLAGS="$CXXFLAGS -mstackrealign"
        fi

    	AC_CHECK_HEADERS(mmintrin.h)
    	AC_DEFINE(_X86_)
	;;
    x86_64-*)
        AC_DEFINE(_AMD64_)
        ;;
    *)
    	AC_DEFINE(_CPU_ARCH_NOT_DEFINED)
	;;
    esac

    if test "$HAVE_64BIT_OS"; then
    	AC_DEFINE(_WIN64)
    fi
    ;;

*-netbsd*)
    DSO_CFLAGS=''
    CFLAGS="$CFLAGS -Dunix"
    CXXFLAGS="$CXXFLAGS -Dunix"
    if $CC -E - -dM </dev/null | grep __ELF__ >/dev/null; then
        DLL_SUFFIX=".so"
        DSO_PIC_CFLAGS='-fPIC -DPIC'
        DSO_LDOPTS='-shared'
	BIN_FLAGS='-Wl,--export-dynamic'
    else
    	DSO_PIC_CFLAGS='-fPIC -DPIC'
    	DLL_SUFFIX=".so.1.0"
    	DSO_LDOPTS='-shared'
    fi
    # This will fail on a.out systems prior to 1.5.1_ALPHA.
    MKSHLIB_FORCE_ALL='-Wl,--whole-archive'
    MKSHLIB_UNFORCE_ALL='-Wl,--no-whole-archive'
    if test "$LIBRUNPATH"; then
	DSO_LDOPTS="-Wl,-R$LIBRUNPATH $DSO_LDOPTS"
    fi
    MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-soname,lib$(LIBRARY_NAME)$(DLL_SUFFIX) -o $@'
    MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-soname,lib$(LIBRARY_NAME)$(DLL_SUFFIX) -o $@'
    ;;

*-openbsd*)
    DLL_SUFFIX=".so.1.0"
    DSO_CFLAGS=''
    DSO_PIC_CFLAGS='-fPIC'
    DSO_LDOPTS='-shared -fPIC'
    if test "$LIBRUNPATH"; then
	DSO_LDOPTS="-R$LIBRUNPATH $DSO_LDOPTS"
    fi
    ;;

*-os2*)
    MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
    MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
    AC_DEFINE(OS2)
    AC_DEFINE(XP_OS2)
    AC_DEFINE(OS2EMX_PLAIN_CHAR)
    AC_DEFINE(TCPV40HDRS)
    DLL_PREFIX=
    LIB_PREFIX=
    LIB_SUFFIX=lib
    BIN_SUFFIX=".exe"
    DLL_SUFFIX=".dll"
    IMPORT_LIB_SUFFIX=lib
    DSO_PIC_CFLAGS=
    AR=emxomfar
    AR_FLAGS='r $@'
    CFLAGS="$CFLAGS -Zomf"
    CXXFLAGS="$CXXFLAGS -Zomf"
    DSO_LDOPTS='-Zdll'
    BIN_FLAGS='-Zlinker /ST:0x100000'
    IMPLIB='emximp -o'
    FILTER='true'
    LDFLAGS='-Zmap'
    WARNINGS_AS_ERRORS='-Werror'
    MOZ_DEBUG_FLAGS="-g -fno-inline"
    MOZ_OPTIMIZE_FLAGS="-O2"
    MOZ_OPTIMIZE_LDFLAGS="-s -Zlinker /EXEPACK:2 -Zlinker /PACKCODE -Zlinker /PACKDATA"
    DYNAMIC_XPCOM_LIBS='-L$(LIBXUL_DIST)/lib $(LIBXUL_DIST)/lib/xpcom.lib $(LIBXUL_DIST)/lib/xpcom_core.lib $(LIBXUL_DIST)/lib/mozalloc.lib'
    LIBXUL_LIBS='-L$(LIBXUL_DIST)/lib $(LIBXUL_DIST)/lib/xpcom.lib $(LIBXUL_DIST)/lib/xul.lib $(LIBXUL_DIST)/lib/mozalloc.lib'
    TARGET_MD_ARCH=os2
    _PLATFORM_DEFAULT_TOOLKIT="cairo-os2"
    RC=rc.exe
    MC=mc.exe
    RCFLAGS='-n'
    MOZ_USER_DIR="Mozilla"

    if test "$MOZTOOLS"; then
        MOZ_TOOLS_DIR=`echo $MOZTOOLS | sed -e 's|\\\\|/|g'`
    else
        AC_MSG_ERROR([MOZTOOLS is not set])
    fi
    if test -n "$MOZ_OS2_HIGH_MEMORY"; then
        DSO_LDOPTS="$DSO_LDOPTS -Zhigh-mem"
        LDFLAGS="$LDFLAGS -Zhigh-mem"
        MOZ_OPTIMIZE_LDFLAGS="$MOZ_OPTIMIZE_LDFLAGS -Zhigh-mem"
        AC_DEFINE(MOZ_OS2_HIGH_MEMORY)
    fi

    # GCC for OS/2 currently predefines these, but we don't want them
    _DEFINES_CFLAGS="$_DEFINES_CFLAGS -Uunix -U__unix -U__unix__"
    _DEFINES_CXXFLAGS="$_DEFINES_CXXFLAGS -Uunix -U__unix -U__unix__"

    AC_CACHE_CHECK(for __declspec(dllexport),
        ac_os2_declspec,
        [AC_TRY_COMPILE([__declspec(dllexport) void ac_os2_declspec(void) {}],
                        [return 0;],
                        ac_os2_declspec="yes",
                        ac_os2_declspec="no")])
    if test "$ac_os2_declspec" != "yes"; then
        AC_MSG_ERROR([Compiler does not support __declspec(dllexport), install GCC-4.3.2 or newer])
    fi
    ;;

alpha*-*-osf*)
    if test "$GNU_CC"; then
      MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-soname,$@ -o $@'
      MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -Wl,-soname,$@ -o $@'

    else
	MOZ_DEBUG_FLAGS='-g'
	ASFLAGS='-I$(topsrcdir)/xpcom/reflect/xptcall/public -g'
	CFLAGS="$CFLAGS -ieee"
	CXXFLAGS="$CXXFLAGS "'-noexceptions -ieee  -ptr $(DIST)/cxx_repository'
	DSO_LDOPTS='-shared -msym -expect_unresolved \* -update_registry $(DIST)/so_locations'
	DSO_CFLAGS=
	DSO_PIC_CFLAGS=
	MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -soname $@ -o $@'
	MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -soname $@ -o $@'
	MKSHLIB_FORCE_ALL='-all'
	MKSHLIB_UNFORCE_ALL='-none'
	dnl Might fix the libxpcom.so breakage on this platform as well....
	AC_DEFINE(NSCAP_DISABLE_TEST_DONTQUERY_CASES)
	AC_DEFINE(NSCAP_DISABLE_DEBUG_PTR_TYPES)
    fi
    if test -z "$GNU_CXX"; then
      COMPAQ_CXX=1
    fi
    AC_DEFINE(NEED_USLEEP_PROTOTYPE)
    ;;

*-sco*)
    AC_DEFINE(NSCAP_DISABLE_TEST_DONTQUERY_CASES)
    AC_DEFINE(NSCAP_DISABLE_DEBUG_PTR_TYPES)
    CXXFLAGS="$CXXFLAGS -I/usr/include/CC"
    if test ! "$GNU_CC"; then
       DSO_LDOPTS='-G'
    fi
    ;;

*-solaris*)
    AC_DEFINE(SOLARIS)
    TARGET_NSPR_MDCPUCFG='\"md/_solaris.cfg\"'
    if test -z "$CROSS_COMPILE" && pkginfo -q SUNWpr && pkginfo -q SUNWprd; then
       NO_NSPR_CONFIG_SYSTEM_LDFLAGS="-L/usr/lib/mps -R/usr/lib/mps -lnspr4"
       NO_NSPR_CONFIG_SYSTEM_CFLAGS="-I/usr/include/mps"
       NO_NSPR_CONFIG_SYSTEM_VERSION=["`pkgparam SUNWpr SUNW_PRODVERS | sed -e 's/^[1-9][0-9]*\.[0-9][0-9]*$/&.0/'`"]
    fi
    SYSTEM_MAKEDEPEND=
    MOZ_FIX_LINK_PATHS=
    # $ORIGIN/.. is for shared libraries under components/ to locate shared
    # libraries one level up (e.g. libnspr4.so)
    if test "$SOLARIS_SUNPRO_CC"; then
       LDFLAGS="$LDFLAGS -z ignore -R '\$\$ORIGIN:\$\$ORIGIN/..' -z lazyload -z combreloc -z muldefs"
       LIBS="-lCrun -lCstd -lc $LIBS"
       NS_USE_NATIVE=1
       AC_DEFINE(NSCAP_DISABLE_DEBUG_PTR_TYPES)
       CFLAGS="$CFLAGS -xlibmieee -xstrconst -xbuiltin=%all -D__FUNCTION__=__func__"
       CXXFLAGS="$CXXFLAGS -xlibmieee -xbuiltin=%all -features=tmplife,tmplrefstatic,extensions -norunpath -D__FUNCTION__=__func__ -template=no%extdef"
       _MOZ_EXCEPTIONS_FLAGS_ON='-features=except'
       _MOZ_EXCEPTIONS_FLAGS_OFF='-features=no%except'
       LDFLAGS="-xildoff $LDFLAGS"
       if test -z "$CROSS_COMPILE" -a -f /usr/lib/ld/map.noexstk; then
           _SAVE_LDFLAGS=$LDFLAGS
           LDFLAGS="-M /usr/lib/ld/map.noexstk $LDFLAGS"
           AC_TRY_LINK([#include <stdio.h>],
                       [printf("Hello World\n");],
                       ,
                       [LDFLAGS=$_SAVE_LDFLAGS])
       fi
       MOZ_OPTIMIZE_FLAGS="-xO4"
       MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_FLAGS) $(DSO_LDOPTS) -h $@ -o $@'
       MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_FLAGS) $(DSO_LDOPTS) -h $@ -o $@'
       MKSHLIB_FORCE_ALL='-z allextract'
       MKSHLIB_UNFORCE_ALL='-z defaultextract'
       DSO_LDOPTS='-G'
       AR_LIST="$AR t"
       AR_EXTRACT="$AR x"
       AR_DELETE="$AR d"
       AR='$(CXX) -xar'
       AR_FLAGS='-o $@'
       AS='/usr/ccs/bin/as'
       ASFLAGS="$ASFLAGS -K PIC -L -P -D_ASM -D__STDC__=0"
       AS_DASH_C_FLAG=''
       TARGET_COMPILER_ABI="sunc"
       CC_VERSION=`$CC -V 2>&1 | grep '^cc:' 2>/dev/null | $AWK -F\: '{ print $2 }'`
       CXX_VERSION=`$CXX -V 2>&1 | grep '^CC:' 2>/dev/null | $AWK -F\: '{ print $2 }'`
       AC_MSG_CHECKING([for Sun C++ compiler version >= 5.9])
       AC_LANG_SAVE
       AC_LANG_CPLUSPLUS
       AC_TRY_COMPILE([],
           [#if (__SUNPRO_CC < 0x590)
           #error "Denied"
           #endif],
           _BAD_COMPILER=,_BAD_COMPILER=1)
       if test -n "$_BAD_COMPILER"; then
           _res="no"
           AC_MSG_ERROR([Sun C++ 5.9 (Sun Studio 12) or higher is required to build. Your compiler version is $CXX_VERSION .])
       else
           _res="yes"
       fi
       AC_TRY_COMPILE([],
           [#if (__SUNPRO_CC >= 0x5100)
           #error "Sun C++ 5.10 or above"
           #endif],
           _ABOVE_SS12U1=,_ABOVE_SS12U1=1)
       if test "$_ABOVE_SS12U1"; then
           # disable xannotate
           CXXFLAGS="$CXXFLAGS -xannotate=no"
       fi
       AC_MSG_RESULT([$_res])
       AC_LANG_RESTORE
    else
       LDFLAGS="$LDFLAGS -Wl,-z,ignore -Wl,-R,'\$\$ORIGIN:\$\$ORIGIN/..' -Wl,-z,lazyload -Wl,-z,combreloc -Wl,-z,muldefs"
       LIBS="-lc $LIBS"
       MKSHLIB_FORCE_ALL='-Wl,-z -Wl,allextract'
       MKSHLIB_UNFORCE_ALL='-Wl,-z -Wl,defaultextract'
       ASFLAGS="$ASFLAGS -fPIC"
       DSO_LDOPTS='-shared'
       WARNINGS_AS_ERRORS='-Werror'
       _WARNINGS_CFLAGS=''
       _WARNINGS_CXXFLAGS=''
       if test "$OS_RELEASE" = "5.3"; then
           AC_DEFINE(MUST_UNDEF_HAVE_BOOLEAN_AFTER_INCLUDES)
       fi
    fi
    if test "$OS_RELEASE" = "5.5.1"; then
        AC_DEFINE(NEED_USLEEP_PROTOTYPE)
    fi
    ;;

*-sunos*)
    DSO_LDOPTS='-Bdynamic'
    MKSHLIB='-$(LD) $(DSO_LDOPTS) -o $@'
    MKCSHLIB='-$(LD) $(DSO_LDOPTS) -o $@'
    AC_DEFINE(SUNOS4)
    AC_DEFINE(SPRINTF_RETURNS_STRING)
    case "$(target_os)" in
    sunos4.1*)
        DLL_SUFFIX='.so.1.0'
        ;;
    esac
    ;;

*-sysv4.2uw7*)
	NSPR_LIBS="-lnspr$NSPR_VERSION -lplc$NSPR_VERSION -lplds$NSPR_VERSION -L/usr/ccs/lib -lcrt"
    ;;

*-os2*)
    HOST_NSPR_MDCPUCFG='\"md/_os2.cfg\"'
    ;;

esac

dnl Only one oddball right now (QNX), but this gives us flexibility
dnl if any other platforms need to override this in the future.
AC_DEFINE_UNQUOTED(D_INO,$DIRENT_INO)

dnl ========================================================
dnl Any platform that doesn't have MKSHLIB_FORCE_ALL defined
dnl by now will not have any way to link most binaries (tests
dnl as well as viewer, apprunner, etc.), because some symbols
dnl will be left out of the "composite" .so's by ld as unneeded.
dnl So, by defining NO_LD_ARCHIVE_FLAGS for these platforms,
dnl they can link in the static libs that provide the missing
dnl symbols.
dnl ========================================================
NO_LD_ARCHIVE_FLAGS=
if test -z "$MKSHLIB_FORCE_ALL" -o -z "$MKSHLIB_UNFORCE_ALL"; then
    NO_LD_ARCHIVE_FLAGS=1
fi
case "$target" in
*-os2*)
    NO_LD_ARCHIVE_FLAGS=
    ;;
*-aix4.3*|*-aix5*)
    NO_LD_ARCHIVE_FLAGS=
    ;;
*-mingw*)
    if test -z "$GNU_CC"; then
        NO_LD_ARCHIVE_FLAGS=
    fi
    ;;
esac
AC_SUBST(NO_LD_ARCHIVE_FLAGS)

dnl ========================================================
dnl = Flags to strip unused symbols from .so components
dnl ========================================================
case "$target" in
    *-linux*|*-kfreebsd*-gnu|*-gnu*)
        MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,--version-script -Wl,$(BUILD_TOOLS)/gnu-ld-scripts/components-version-script'
        ;;
    *-solaris*)
        if test -z "$GNU_CC"; then
         MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-M $(BUILD_TOOLS)/gnu-ld-scripts/components-mapfile'
        else
         if test -z "$GCC_USE_GNU_LD"; then
          MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,-M -Wl,$(BUILD_TOOLS)/gnu-ld-scripts/components-mapfile'
         else
          MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,--version-script -Wl,$(BUILD_TOOLS)/gnu-ld-scripts/components-version-script'
         fi
        fi
        ;;
    *-nto*)
        MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,--version-script,$(BUILD_TOOLS)/gnu-ld-scripts/components-version-script'
        ;;
    *-darwin*)
        MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,-exported_symbols_list -Wl,$(BUILD_TOOLS)/gnu-ld-scripts/components-export-list'
        ;;
    *-mingw*)
        if test -n "$GNU_CC"; then
           MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS='-Wl,--version-script,$(BUILD_TOOLS)/gnu-ld-scripts/components-version-script'
        fi
        ;;
esac

if test -z "$COMPILE_ENVIRONMENT"; then
    SKIP_COMPILER_CHECKS=1
    SKIP_LIBRARY_CHECKS=1
fi

dnl Configure JIT support

case "$target" in
i?86-*)
    ENABLE_TRACEJIT=1
    NANOJIT_ARCH=i386
    ENABLE_METHODJIT=1
    ENABLE_MONOIC=1
    ENABLE_POLYIC=1
    ENABLE_METHODJIT_TYPED_ARRAY=1
    AC_DEFINE(JS_CPU_X86)
    AC_DEFINE(JS_NUNBOX32)
    ;;
x86_64*-*)
    ENABLE_TRACEJIT=1
    NANOJIT_ARCH=X64
    ENABLE_METHODJIT=1
    ENABLE_MONOIC=1
    ENABLE_POLYIC=1
    ENABLE_METHODJIT_TYPED_ARRAY=1
    AC_DEFINE(JS_CPU_X64)
    AC_DEFINE(JS_PUNBOX64)
    ;;
arm*-*)
    ENABLE_TRACEJIT=1
    NANOJIT_ARCH=ARM
    ENABLE_METHODJIT=1
    ENABLE_MONOIC=1
    ENABLE_POLYIC=1
    ENABLE_POLYIC_TYPED_ARRAY=1
    AC_DEFINE(JS_CPU_ARM)
    AC_DEFINE(JS_NUNBOX32)
    ;;
sparc*-*)
    ENABLE_TRACEJIT=1
    NANOJIT_ARCH=Sparc
    ENABLE_METHODJIT=1
    ENABLE_MONOIC=1
    ENABLE_POLYIC=1
    ENABLE_METHODJIT_TYPED_ARRAY=1
    AC_DEFINE(JS_CPU_SPARC)
    AC_DEFINE(JS_NUNBOX32)
    ;;
esac

MOZ_ARG_DISABLE_BOOL(methodjit,
[  --disable-methodjit           Disable method JIT support],
  ENABLE_METHODJIT= )

MOZ_ARG_DISABLE_BOOL(monoic,
[  --disable-monoic      Disable use of MICs by JIT compiler],
  ENABLE_MONOIC= )

MOZ_ARG_DISABLE_BOOL(polyic,
[  --disable-polyic      Disable use of PICs by JIT compiler],
  ENABLE_POLYIC= )

MOZ_ARG_DISABLE_BOOL(tracejit,
[  --disable-tracejit      Disable tracing JIT support],
  ENABLE_TRACEJIT=)

MOZ_ARG_ENABLE_BOOL(methodjit-spew,
[  --enable-methodjit-spew      Enable method JIT spew support],
  ENABLE_METHODJIT_SPEW=1,
  ENABLE_METHODJIT_SPEW= )

AC_SUBST(ENABLE_METHODJIT)

if test "$ENABLE_METHODJIT"; then
    AC_DEFINE(JS_METHODJIT)
fi

if test "$ENABLE_MONOIC"; then
    AC_DEFINE(JS_MONOIC)
fi

if test "$ENABLE_POLYIC"; then
    AC_DEFINE(JS_POLYIC)
fi

if test "$ENABLE_METHODJIT_TYPED_ARRAY"; then
    AC_DEFINE(JS_METHODJIT_TYPED_ARRAY)
fi

if test "$ENABLE_METHODJIT_SPEW"; then
    AC_DEFINE(JS_METHODJIT_SPEW)
fi

if test "$ENABLE_TRACEJIT"; then

AC_DEFINE(FEATURE_NANOJIT)
AC_DEFINE(JS_TRACER)

case "$target" in
i?86-*)
    AC_DEFINE(AVMPLUS_IA32)
    ;;
x86_64*-*)
    AC_DEFINE(AVMPLUS_AMD64)
    AC_DEFINE(AVMPLUS_64BIT)
    ;;
arm*-*)
    AC_DEFINE(AVMPLUS_ARM)
    ;;
sparc-*)
    AC_DEFINE(AVMPLUS_SPARC)
    ;;
esac

case "$target" in
*-linux*|*-android*|*-linuxandroid*)
    AC_DEFINE(AVMPLUS_UNIX)
    AC_DEFINE(AVMPLUS_LINUX)
    ;;
*-darwin*)
    AC_DEFINE(AVMPLUS_UNIX)
    ;;
*-solaris*)
    AC_DEFINE(AVMPLUS_UNIX)
    ;;
*-freebsd*|*-kfreebsd*)
    AC_DEFINE(AVMPLUS_UNIX)
    ;;
*-openbsd*)
    AC_DEFINE(AVMPLUS_UNIX)
    ;;
*-gnu*)
    AC_DEFINE(AVMPLUS_UNIX)
    ;;
*-mingw*)
    AC_DEFINE(AVMPLUS_WIN32)
    ;;
*-os2*)
    AC_DEFINE(AVMPLUS_OS2)
    ;;
*)
    AC_MSG_ERROR([Unrecognized nanojit platform. Use --disable-tracejit to build without tracing JIT support.])
esac

fi # ENABLE_TRACEJIT

AC_SUBST(ENABLE_TRACEJIT)
AC_SUBST(NANOJIT_ARCH)

if test -z "$SKIP_COMPILER_CHECKS"; then
dnl Checks for typedefs, structures, and compiler characteristics.
dnl ========================================================
AC_HEADER_STDC
AC_C_CONST
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_LANG_CPLUSPLUS
AC_MSG_CHECKING(for __stdcall)
AC_CACHE_VAL(ac_cv___stdcall,
 [AC_TRY_COMPILE([template <typename Method> struct foo;
                  template <> struct foo<void (*)()> {};
                  template <> struct foo<void (__stdcall*)()> {};],
                 [],
                 [ac_cv___stdcall=true],
                 [ac_cv___stdcall=false])])
if test "$ac_cv___stdcall" = true ; then
  AC_DEFINE(HAVE_STDCALL)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_LANG_C
AC_MSG_CHECKING(for ssize_t)
AC_CACHE_VAL(ac_cv_type_ssize_t,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [ssize_t foo = 0;],
                 [ac_cv_type_ssize_t=true],
                 [ac_cv_type_ssize_t=false])])
if test "$ac_cv_type_ssize_t" = true ; then
  AC_DEFINE(HAVE_SSIZE_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_STRUCT_ST_BLKSIZE
AC_MSG_CHECKING(for siginfo_t)
AC_CACHE_VAL(ac_cv_siginfo_t,
 [AC_TRY_COMPILE([#define _POSIX_C_SOURCE 199506L
                  #include <signal.h>],
                 [siginfo_t* info;],
                 [ac_cv_siginfo_t=true],
                 [ac_cv_siginfo_t=false])])
if test "$ac_cv_siginfo_t" = true ; then
  AC_DEFINE(HAVE_SIGINFO_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

dnl Find exact-width integer types, or figure them out
dnl ourselves.
dnl ========================================================
dnl Once this is working, we can delete the code for int16_t,
dnl etc. below.

AC_CHECK_HEADER(stdint.h)
if test "$ac_cv_header_stdint_h" = yes; then
    AC_DEFINE(JS_HAVE_STDINT_H)
else
    dnl We'll figure them out for ourselves.  List more likely types
    dnl earlier.  If we ever really encounter a size for which none of
    dnl the listed types are appropriate, we'll get a configure-time
    dnl error; just add the right answer.
    MOZ_N_BYTE_TYPE(JS_INT8_TYPE,  1, [char])
    MOZ_N_BYTE_TYPE(JS_INT16_TYPE, 2, [short int long])
    MOZ_N_BYTE_TYPE(JS_INT32_TYPE, 4, [int long 'long long' short])
    MOZ_N_BYTE_TYPE(JS_INT64_TYPE, 8, [int long 'long long'])
    MOZ_N_BYTE_TYPE(JS_INTPTR_TYPE, sizeof (void *),
                                      [int long 'long long' short])
fi

MOZ_SIZE_OF_TYPE(JS_BYTES_PER_WORD, void*, 4 8)
if test "$moz_cv_size_of_JS_BYTES_PER_WORD" -eq "4"; then
  AC_DEFINE(JS_BITS_PER_WORD_LOG2, 5)
elif test "$moz_cv_size_of_JS_BYTES_PER_WORD" -eq "8"; then
  AC_DEFINE(JS_BITS_PER_WORD_LOG2, 6)
else
  AC_MSG_ERROR([Unexpected JS_BYTES_PER_WORD])
fi

MOZ_ALIGN_OF_TYPE(JS_ALIGN_OF_POINTER, void*, 2 4 8 16)
MOZ_SIZE_OF_TYPE(JS_BYTES_PER_DOUBLE, double, 6 8 10 12 14)

dnl Check for int16_t, int32_t, int64_t, int64, uint, uint_t, and uint16_t.
dnl ========================================================
AC_MSG_CHECKING(for int16_t)
AC_CACHE_VAL(ac_cv_int16_t,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [int16_t foo = 0;],
                 [ac_cv_int16_t=true],
                 [ac_cv_int16_t=false])])
if test "$ac_cv_int16_t" = true ; then
  AC_DEFINE(HAVE_INT16_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING(for int32_t)
AC_CACHE_VAL(ac_cv_int32_t,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [int32_t foo = 0;],
                 [ac_cv_int32_t=true],
                 [ac_cv_int32_t=false])])
if test "$ac_cv_int32_t" = true ; then
  AC_DEFINE(HAVE_INT32_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING(for int64_t)
AC_CACHE_VAL(ac_cv_int64_t,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [int64_t foo = 0;],
                 [ac_cv_int64_t=true],
                 [ac_cv_int64_t=false])])
if test "$ac_cv_int64_t" = true ; then
  AC_DEFINE(HAVE_INT64_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING(for int64)
AC_CACHE_VAL(ac_cv_int64,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [int64 foo = 0;],
                 [ac_cv_int64=true],
                 [ac_cv_int64=false])])
if test "$ac_cv_int64" = true ; then
  AC_DEFINE(HAVE_INT64)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING(for uint)
AC_CACHE_VAL(ac_cv_uint,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [uint foo = 0;],
                 [ac_cv_uint=true],
                 [ac_cv_uint=false])])
if test "$ac_cv_uint" = true ; then
  AC_DEFINE(HAVE_UINT)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING(for uint_t)
AC_CACHE_VAL(ac_cv_uint_t,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [uint_t foo = 0;],
                 [ac_cv_uint_t=true],
                 [ac_cv_uint_t=false])])
if test "$ac_cv_uint_t" = true ; then
  AC_DEFINE(HAVE_UINT_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi
AC_MSG_CHECKING(for uint16_t)
AC_CACHE_VAL(ac_cv_uint16_t,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [uint16_t foo = 0;],
                 [ac_cv_uint16_t=true],
                 [ac_cv_uint16_t=false])])
if test "$ac_cv_uint16_t" = true ; then
  AC_DEFINE(HAVE_UINT16_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

dnl On the gcc trunk (as of 2001-02-09) _GNU_SOURCE, and thus __USE_GNU,
dnl are defined when compiling C++ but not C.  Since the result of this
dnl test is used only in C++, do it in C++.
AC_LANG_CPLUSPLUS

AC_MSG_CHECKING(for uname.domainname)
AC_CACHE_VAL(ac_cv_have_uname_domainname_field,
    [AC_TRY_COMPILE([#include <sys/utsname.h>],
        [ struct utsname *res; char *domain;
            (void)uname(res);  if (res != 0) { domain = res->domainname; } ],
        [ac_cv_have_uname_domainname_field=true],
        [ac_cv_have_uname_domainname_field=false])])

if test "$ac_cv_have_uname_domainname_field" = "true"; then
    AC_DEFINE(HAVE_UNAME_DOMAINNAME_FIELD)
    AC_MSG_RESULT(yes)
else
    AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(for uname.__domainname)
AC_CACHE_VAL(ac_cv_have_uname_us_domainname_field,
    [AC_TRY_COMPILE([#include <sys/utsname.h>],
        [ struct utsname *res; char *domain;
            (void)uname(res);  if (res != 0) { domain = res->__domainname; } ],
        [ac_cv_have_uname_us_domainname_field=true],
        [ac_cv_have_uname_us_domainname_field=false])])

if test "$ac_cv_have_uname_us_domainname_field" = "true"; then
    AC_DEFINE(HAVE_UNAME_US_DOMAINNAME_FIELD)
    AC_MSG_RESULT(yes)
else
    AC_MSG_RESULT(no)
fi

AC_LANG_C

dnl Check for .hidden assembler directive and visibility attribute.
dnl Borrowed from glibc configure.in
dnl ===============================================================
if test "$GNU_CC"; then
  AC_CACHE_CHECK(for visibility(hidden) attribute,
                 ac_cv_visibility_hidden,
                 [cat > conftest.c <<EOF
                  int foo __attribute__ ((visibility ("hidden"))) = 1;
EOF
                  ac_cv_visibility_hidden=no
                  if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
                    if egrep '\.(hidden|private_extern).*foo' conftest.s >/dev/null; then
                      ac_cv_visibility_hidden=yes
                    fi
                  fi
                  rm -f conftest.[cs]
                 ])
  if test "$ac_cv_visibility_hidden" = "yes"; then
    AC_DEFINE(HAVE_VISIBILITY_HIDDEN_ATTRIBUTE)

    AC_CACHE_CHECK(for visibility(default) attribute,
                   ac_cv_visibility_default,
                   [cat > conftest.c <<EOF
                    int foo __attribute__ ((visibility ("default"))) = 1;
EOF
                    ac_cv_visibility_default=no
                    if ${CC-cc} -fvisibility=hidden -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
                      if ! egrep '\.(hidden|private_extern).*foo' conftest.s >/dev/null; then
                        ac_cv_visibility_default=yes
                      fi
                    fi
                    rm -f conftest.[cs]
                   ])
    if test "$ac_cv_visibility_default" = "yes"; then
      AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)

      AC_CACHE_CHECK(for visibility pragma support,
                     ac_cv_visibility_pragma,
                     [cat > conftest.c <<EOF
#pragma GCC visibility push(hidden)
                      int foo_hidden = 1;
#pragma GCC visibility push(default)
                      int foo_default = 1;
EOF
                      ac_cv_visibility_pragma=no
                      if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
                        if egrep '\.(hidden|private_extern).*foo_hidden' conftest.s >/dev/null; then
                          if ! egrep '\.(hidden|private_extern).*foo_default' conftest.s > /dev/null; then
                            ac_cv_visibility_pragma=yes
                          fi
                        fi
                      fi
                      rm -f conftest.[cs]
                    ])
      if test "$ac_cv_visibility_pragma" = "yes"; then
        AC_CACHE_CHECK(For gcc visibility bug with class-level attributes (GCC bug 26905),
                       ac_cv_have_visibility_class_bug,
                       [cat > conftest.c <<EOF
#pragma GCC visibility push(hidden)
struct __attribute__ ((visibility ("default"))) TestStruct {
  static void Init();
};
__attribute__ ((visibility ("default"))) void TestFunc() {
  TestStruct::Init();
}
EOF
                       ac_cv_have_visibility_class_bug=no
                       if ! ${CXX-g++} ${CXXFLAGS} ${DSO_PIC_CFLAGS} ${DSO_LDOPTS} -S -o conftest.S conftest.c > /dev/null 2>&1 ; then
                         ac_cv_have_visibility_class_bug=yes
                       else
                         if test `egrep -c '@PLT|\\$stub' conftest.S` = 0; then
                           ac_cv_have_visibility_class_bug=yes
                         fi
                       fi
                       rm -rf conftest.{c,S}
                       ])

        AC_CACHE_CHECK(For x86_64 gcc visibility bug with builtins (GCC bug 20297),
                       ac_cv_have_visibility_builtin_bug,
                       [cat > conftest.c <<EOF
#pragma GCC visibility push(hidden)
#pragma GCC visibility push(default)
#include <string.h>
#pragma GCC visibility pop

__attribute__ ((visibility ("default"))) void Func() {
  char c[[100]];
  memset(c, 0, sizeof(c));
}
EOF
                       ac_cv_have_visibility_builtin_bug=no
                       if ! ${CC-cc} ${CFLAGS} ${DSO_PIC_CFLAGS} ${DSO_LDOPTS} -O2 -S -o conftest.S conftest.c > /dev/null 2>&1 ; then
                         ac_cv_have_visibility_builtin_bug=yes
                       else
                         if test `grep -c "@PLT" conftest.S` = 0; then
                           ac_cv_visibility_builtin_bug=yes
                         fi
                       fi
                       rm -f conftest.{c,S}
                       ])
        if test "$ac_cv_have_visibility_builtin_bug" = "no" -a \
                "$ac_cv_have_visibility_class_bug" = "no"; then
          VISIBILITY_FLAGS='-I$(DIST)/system_wrappers_js -include $(topsrcdir)/config/gcc_hidden.h'
          WRAP_SYSTEM_INCLUDES=1
          STL_FLAGS='-I$(DIST)/stl_wrappers'
          WRAP_STL_INCLUDES=1
        else
          VISIBILITY_FLAGS='-fvisibility=hidden'
        fi # have visibility pragma bug
      fi   # have visibility pragma
    fi     # have visibility(default) attribute
  fi       # have visibility(hidden) attribute
fi         # GNU_CC

# visibility hidden flag for Sun Studio on Solaris
if test "$SOLARIS_SUNPRO_CC"; then
VISIBILITY_FLAGS='-xldscope=hidden'
fi         # Sun Studio on Solaris

AC_SUBST(WRAP_SYSTEM_INCLUDES)
AC_SUBST(VISIBILITY_FLAGS)

MOZ_GCC_PR49911

dnl Check for __force_align_arg_pointer__ for SSE2 on gcc
dnl ========================================================
if test "$GNU_CC"; then
  CFLAGS_save="${CFLAGS}"
  CFLAGS="${CFLAGS} -Werror"
  AC_CACHE_CHECK(for __force_align_arg_pointer__ attribute,
                 ac_cv_force_align_arg_pointer,
                 [AC_TRY_COMPILE([__attribute__ ((__force_align_arg_pointer__)) void test() {}],
                                 [],
                                 ac_cv_force_align_arg_pointer="yes",
                                 ac_cv_force_align_arg_pointer="no")])
  CFLAGS="${CFLAGS_save}"
  if test "$ac_cv_force_align_arg_pointer" = "yes"; then
    HAVE_GCC_ALIGN_ARG_POINTER=1
  else
    HAVE_GCC_ALIGN_ARG_POINTER=
  fi
fi
AC_SUBST(HAVE_GCC_ALIGN_ARG_POINTER)

dnl Checks for header files.
dnl ========================================================
AC_HEADER_DIRENT
case "$target_os" in
freebsd*)
# for stuff like -lXshm
    CPPFLAGS="${CPPFLAGS} ${X_CFLAGS}"
    ;;
esac
AC_CHECK_HEADERS(sys/byteorder.h compat.h getopt.h)
AC_CHECK_HEADERS(sys/bitypes.h memory.h unistd.h)
AC_CHECK_HEADERS(gnu/libc-version.h nl_types.h)
AC_CHECK_HEADERS(malloc.h)
AC_CHECK_HEADERS(X11/XKBlib.h)
AC_CHECK_HEADERS(io.h)

dnl These are all the places some variant of statfs can be hiding.
AC_CHECK_HEADERS(sys/statvfs.h sys/statfs.h sys/vfs.h sys/mount.h)

dnl Quota support
AC_CHECK_HEADERS(sys/quota.h)
AC_CHECK_HEADERS(linux/quota.h)

dnl Try for MMX support
dnl NB - later gcc versions require -mmmx for this header to be successfully
dnl included (or another option which implies it, such as -march=pentium-mmx)
AC_CHECK_HEADERS(mmintrin.h)

dnl Check whether the compiler supports the new-style C++ standard
dnl library headers (i.e. <new>) or needs the old "new.h"
AC_LANG_CPLUSPLUS
NEW_H=new.h
AC_CHECK_HEADER(new, [NEW_H=new])
AC_DEFINE_UNQUOTED(NEW_H, <$NEW_H>)
AC_LANG_C

AC_ARG_ENABLE(dtrace,
              [  --enable-dtrace         build with dtrace support if available (default=no)],
              [enable_dtrace="yes"],)
if test "x$enable_dtrace" = "xyes"; then
  AC_CHECK_HEADER(sys/sdt.h, HAVE_DTRACE=1)
  if test -n "$HAVE_DTRACE"; then
      AC_DEFINE(INCLUDE_MOZILLA_DTRACE)
  else
      AC_MSG_ERROR([dtrace enabled but sys/sdt.h not found]);
  fi
fi
AC_SUBST(HAVE_DTRACE)

case $target in
*-aix4.3*|*-aix5*)
	;;
*)
	AC_CHECK_HEADERS(sys/cdefs.h)
	;;
esac

dnl Performance measurement headers.
AC_CHECK_HEADER(linux/perf_event.h,
    [AC_CACHE_CHECK(for perf_event_open system call,ac_cv_perf_event_open,
        [AC_TRY_COMPILE([#include <sys/syscall.h>],[return sizeof(__NR_perf_event_open);],
        ac_cv_perf_event_open=yes,
        ac_cv_perf_event_open=no)])])
if test "$ac_cv_perf_event_open" = "yes"; then
    HAVE_LINUX_PERF_EVENT_H=1
else
    HAVE_LINUX_PERF_EVENT_H=
fi
AC_SUBST(HAVE_LINUX_PERF_EVENT_H)

dnl Checks for libraries.
dnl ========================================================
case $target in
*-hpux11.*)
	;;
*)
	AC_CHECK_LIB(c_r, gethostbyname_r)
	;;
esac

dnl We don't want to link with libdl even if it's present on OS X, since
dnl it's not used and not part of the default installation. OS/2 has dlfcn
dnl in libc.
dnl We don't want to link against libm or libpthread on Darwin since
dnl they both are just symlinks to libSystem and explicitly linking
dnl against libSystem causes issues when debugging (see bug 299601).
case $target in
*-darwin*)
    ;;
*-os2*)
    ;;
*)
    AC_SEARCH_LIBS(dlopen, dl,
        AC_CHECK_HEADER(dlfcn.h,
        AC_DEFINE(HAVE_DLOPEN)))
    ;;
esac

_SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -D_GNU_SOURCE"
AC_CHECK_FUNCS(dladdr)
CFLAGS="$_SAVE_CFLAGS"

if test ! "$GNU_CXX"; then

    case $target in
    *-aix*)
	AC_CHECK_LIB(C_r, demangle)
	;;
     *)
	AC_CHECK_LIB(C, demangle)
	;;
     esac
fi

dnl OS/2 has socket in libc.
case $target in
*-os2*)
    ;;
*)
    AC_CHECK_LIB(socket, socket)
esac

dnl ========================================================
dnl = pthread support
dnl = Start by checking whether the system support pthreads
dnl ========================================================
case "$target_os" in
darwin*)
    USE_PTHREADS=1
    ;;
*)
    MOZ_CHECK_PTHREADS(pthreads,
        USE_PTHREADS=1 _PTHREAD_LDFLAGS="-lpthreads",
        MOZ_CHECK_PTHREADS(pthread,
            USE_PTHREADS=1 _PTHREAD_LDFLAGS="-lpthread",
            MOZ_CHECK_PTHREADS(c_r,
                USE_PTHREADS=1 _PTHREAD_LDFLAGS="-lc_r",
                MOZ_CHECK_PTHREADS(c,
                    USE_PTHREADS=1
                )
            )
        )
    )
    ;;
esac

dnl ========================================================
dnl Check the command line for --with-pthreads
dnl ========================================================
MOZ_ARG_WITH_BOOL(pthreads,
[  --with-pthreads         Force use of system pthread library with NSPR ],
[ if test "$USE_PTHREADS"x = x; then
    AC_MSG_ERROR([ --with-pthreads specified for a system without pthread support ]);
fi],
    USE_PTHREADS=
    _PTHREAD_LDFLAGS=
)

dnl ========================================================
dnl Do the platform specific pthread hackery
dnl ========================================================
if test "$USE_PTHREADS"x != x
then
	dnl
	dnl See if -pthread is supported.
	dnl
	rm -f conftest*
	ac_cv_have_dash_pthread=no
	AC_MSG_CHECKING(whether ${CC-cc} accepts -pthread)
	echo 'int main() { return 0; }' | cat > conftest.c
	${CC-cc} -pthread -o conftest conftest.c > conftest.out 2>&1
	if test $? -eq 0; then
		if test -z "`egrep -i '(unrecognize|unknown)' conftest.out | grep pthread`" -a -z "`egrep -i '(error|incorrect)' conftest.out`" ; then
			ac_cv_have_dash_pthread=yes
	        case "$target_os" in
	        freebsd*)
# Freebsd doesn't use -pthread for compiles, it uses them for linking
                ;;
	        *)
			    CFLAGS="$CFLAGS -pthread"
			    CXXFLAGS="$CXXFLAGS -pthread"
                ;;
	        esac
		fi
	fi
	rm -f conftest*
    AC_MSG_RESULT($ac_cv_have_dash_pthread)

	dnl
	dnl See if -pthreads is supported.
	dnl
    ac_cv_have_dash_pthreads=no
    if test "$ac_cv_have_dash_pthread" = "no"; then
	    AC_MSG_CHECKING(whether ${CC-cc} accepts -pthreads)
    	echo 'int main() { return 0; }' | cat > conftest.c
	    ${CC-cc} -pthreads -o conftest conftest.c > conftest.out 2>&1
    	if test $? -eq 0; then
	    	if test -z "`egrep -i '(unrecognize|unknown)' conftest.out | grep pthreads`" -a -z "`egrep -i '(error|incorrect)' conftest.out`" ; then
			    ac_cv_have_dash_pthreads=yes
			    CFLAGS="$CFLAGS -pthreads"
			    CXXFLAGS="$CXXFLAGS -pthreads"
		    fi
	    fi
	    rm -f conftest*
    	AC_MSG_RESULT($ac_cv_have_dash_pthreads)
    fi

	case "$target" in
	    *-*-freebsd*)
			AC_DEFINE(_REENTRANT)
			AC_DEFINE(_THREAD_SAFE)
			dnl -pthread links in -lc_r, so don't specify it explicitly.
			if test "$ac_cv_have_dash_pthread" = "yes"; then
				_PTHREAD_LDFLAGS="-pthread"
			else
				_PTHREAD_LDFLAGS="-lc_r"
			fi
			;;

	    *-*-openbsd*|*-*-bsdi*)
			AC_DEFINE(_REENTRANT)
			AC_DEFINE(_THREAD_SAFE)
			dnl -pthread links in -lc_r, so don't specify it explicitly.
			if test "$ac_cv_have_dash_pthread" = "yes"; then
                _PTHREAD_LDFLAGS="-pthread"
			fi
			;;

	    *-*-linux*|*-*-kfreebsd*-gnu|*-*-gnu*)
			AC_DEFINE(_REENTRANT)
			;;

	    *-*-nto*)
			AC_DEFINE(_REENTRANT)
			;;

	    *-aix4.3*|*-aix5*)
			AC_DEFINE(_REENTRANT)
			;;

	    *-hpux11.*)
			AC_DEFINE(_REENTRANT)
			;;

	    alpha*-*-osf*)
			AC_DEFINE(_REENTRANT)
			;;

	    *-*-solaris*)
			AC_DEFINE(_REENTRANT)
			if test "$SOLARIS_SUNPRO_CC"; then
				CFLAGS="$CFLAGS -mt"
				CXXFLAGS="$CXXFLAGS -mt"
			fi
			;;
	esac
    LDFLAGS="${_PTHREAD_LDFLAGS} ${LDFLAGS}"
fi


dnl Checks for library functions.
dnl ========================================================
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_CHECK_FUNCS([fchmod flockfile getc_unlocked _getc_nolock getpagesize \
                lchown localtime_r lstat64 memmove random rint sbrk snprintf \
                stat64 statvfs statvfs64 strerror strtok_r truncate64])

dnl check for clock_gettime(), the CLOCK_MONOTONIC clock, and -lrt
_SAVE_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS -lrt"
AC_CACHE_CHECK(for clock_gettime(CLOCK_MONOTONIC) and -lrt,
               ac_cv_have_clock_monotonic,
               [AC_TRY_LINK([#include <time.h>],
                            [ struct timespec ts;
                              clock_gettime(CLOCK_MONOTONIC, &ts); ],
                            ac_cv_have_clock_monotonic=yes,
                            ac_cv_have_clock_monotonic=no)])
LDFLAGS=$_SAVE_LDFLAGS
if test "$ac_cv_have_clock_monotonic" = "yes"; then
    HAVE_CLOCK_MONOTONIC=1
    REALTIME_LIBS=-lrt
    AC_DEFINE(HAVE_CLOCK_MONOTONIC)
    AC_SUBST(HAVE_CLOCK_MONOTONIC)
    AC_SUBST(REALTIME_LIBS)
fi

dnl Windows functions, for mingw.
AC_TRY_LINK([#include <windows.h>],
             [SYSTEMTIME st;FILETIME ft;SystemTimeToFileTime(&st,&ft);],
             ac_cv_have_systemtimetofiletime="yes",
             ac_cv_have_systemtimetofiletime="no")
if test "$ac_cv_have_systemtimetofiletime" = "yes"; then
    AC_DEFINE(HAVE_SYSTEMTIMETOFILETIME)
fi
AC_TRY_LINK([#include <windows.h>],
             [FILETIME ft;GetSystemTimeAsFileTime(&ft);],
             ac_cv_have_getsystemtimeasfiletime="yes",
             ac_cv_have_getsystemtimeasfiletime="no")
if test "$ac_cv_have_getsystemtimeasfiletime" = "yes"; then
    AC_DEFINE(HAVE_GETSYSTEMTIMEASFILETIME)
fi

dnl check for wcrtomb/mbrtowc
dnl =======================================================================
if test -z "$MACOS_DEPLOYMENT_TARGET" || test "$MACOS_DEPLOYMENT_TARGET" -ge "100300"; then
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_CACHE_CHECK(for wcrtomb,
    ac_cv_have_wcrtomb,
    [AC_TRY_LINK([#include <wchar.h>],
                 [mbstate_t ps={0};wcrtomb(0,'f',&ps);],
                 ac_cv_have_wcrtomb="yes",
                 ac_cv_have_wcrtomb="no")])
if test "$ac_cv_have_wcrtomb" = "yes"; then
    AC_DEFINE(HAVE_WCRTOMB)
fi
AC_CACHE_CHECK(for mbrtowc,
    ac_cv_have_mbrtowc,
    [AC_TRY_LINK([#include <wchar.h>],
                 [mbstate_t ps={0};mbrtowc(0,0,0,&ps);],
                 ac_cv_have_mbrtowc="yes",
                 ac_cv_have_mbrtowc="no")])
if test "$ac_cv_have_mbrtowc" = "yes"; then
    AC_DEFINE(HAVE_MBRTOWC)
fi
AC_LANG_RESTORE
fi

AC_CACHE_CHECK(
    [for res_ninit()],
    ac_cv_func_res_ninit,
    [AC_TRY_LINK([
        #ifdef linux
        #define _BSD_SOURCE 1
        #endif
        #include <resolv.h>
        ],
        [int foo = res_ninit(&_res);],
        [ac_cv_func_res_ninit=yes],
        [ac_cv_func_res_ninit=no])
    ])

if test "$ac_cv_func_res_ninit" = "yes"; then
    AC_DEFINE(HAVE_RES_NINIT)
dnl must add the link line we do something as foolish as this... dougt
dnl else
dnl    AC_CHECK_LIB(bind, res_ninit, AC_DEFINE(HAVE_RES_NINIT),
dnl        AC_CHECK_LIB(resolv, res_ninit, AC_DEFINE(HAVE_RES_NINIT)))
fi

AC_LANG_CPLUSPLUS
AC_CACHE_CHECK(
    [for gnu_get_libc_version()],
    ac_cv_func_gnu_get_libc_version,
    [AC_TRY_LINK([
        #ifdef HAVE_GNU_LIBC_VERSION_H
        #include <gnu/libc-version.h>
        #endif
        ],
        [const char *glibc_version = gnu_get_libc_version();],
        [ac_cv_func_gnu_get_libc_version=yes],
        [ac_cv_func_gnu_get_libc_version=no]
        )]
    )

if test "$ac_cv_func_gnu_get_libc_version" = "yes"; then
    AC_DEFINE(HAVE_GNU_GET_LIBC_VERSION)
fi

case $target_os in
    darwin*|mingw*|os2*)
        ;;
    *)

AC_CHECK_LIB(c, iconv, [_ICONV_LIBS="$_ICONV_LIBS"],
    AC_CHECK_LIB(iconv, iconv, [_ICONV_LIBS="$_ICONV_LIBS -liconv"],
        AC_CHECK_LIB(iconv, libiconv, [_ICONV_LIBS="$_ICONV_LIBS -liconv"])))
_SAVE_LIBS=$LIBS
LIBS="$LIBS $_ICONV_LIBS"
AC_CACHE_CHECK(
    [for iconv()],
    ac_cv_func_iconv,
    [AC_TRY_LINK([
        #include <stdlib.h>
        #include <iconv.h>
        ],
        [
            iconv_t h = iconv_open("", "");
            iconv(h, NULL, NULL, NULL, NULL);
            iconv_close(h);
        ],
        [ac_cv_func_iconv=yes],
        [ac_cv_func_iconv=no]
        )]
    )
if test "$ac_cv_func_iconv" = "yes"; then
    AC_DEFINE(HAVE_ICONV)
    DYNAMIC_XPCOM_LIBS="$DYNAMIC_XPCOM_LIBS $_ICONV_LIBS"
    LIBXUL_LIBS="$LIBXUL_LIBS $_ICONV_LIBS"
    LIBICONV="$_ICONV_LIBS"
    AC_CACHE_CHECK(
        [for iconv() with const input],
        ac_cv_func_const_iconv,
        [AC_TRY_COMPILE([
            #include <stdlib.h>
            #include <iconv.h>
            ],
            [
                const char *input = "testing";
                iconv_t h = iconv_open("", "");
                iconv(h, &input, NULL, NULL, NULL);
                iconv_close(h);
            ],
            [ac_cv_func_const_iconv=yes],
            [ac_cv_func_const_iconv=no]
            )]
        )
    if test "$ac_cv_func_const_iconv" = "yes"; then
        AC_DEFINE(HAVE_ICONV_WITH_CONST_INPUT)
    fi
fi
LIBS=$_SAVE_LIBS

    ;;
esac

AC_LANG_C

dnl **********************
dnl *** va_copy checks ***
dnl **********************
dnl we currently check for all three va_copy possibilities, so we get
dnl all results in config.log for bug reports.
AC_MSG_CHECKING(for an implementation of va_copy())
AC_CACHE_VAL(ac_cv_va_copy,[
    AC_TRY_RUN([
        #include <stdarg.h>
        void f (int i, ...) {
            va_list args1, args2;
            va_start (args1, i);
            va_copy (args2, args1);
            if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
                exit (1);
            va_end (args1); va_end (args2);
        }
        int main() { f (0, 42); return 0; }],
        ac_cv_va_copy=yes,
        ac_cv_va_copy=no,
        ac_cv_va_copy=no
    )
])
AC_MSG_RESULT($ac_cv_va_copy)
AC_MSG_CHECKING(for an implementation of __va_copy())
AC_CACHE_VAL(ac_cv___va_copy,[
    AC_TRY_RUN([
        #include <stdarg.h>
        void f (int i, ...) {
            va_list args1, args2;
            va_start (args1, i);
            __va_copy (args2, args1);
            if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
                exit (1);
            va_end (args1); va_end (args2);
        }
        int main() { f (0, 42); return 0; }],
        ac_cv___va_copy=yes,
        ac_cv___va_copy=no,
        ac_cv___va_copy=no
    )
])
AC_MSG_RESULT($ac_cv___va_copy)
AC_MSG_CHECKING(whether va_lists can be copied by value)
AC_CACHE_VAL(ac_cv_va_val_copy,[
    AC_TRY_RUN([
        #include <stdarg.h>
        void f (int i, ...) {
            va_list args1, args2;
            va_start (args1, i);
            args2 = args1;
            if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
                exit (1);
            va_end (args1); va_end (args2);
        }
        int main() { f (0, 42); return 0; }],
        ac_cv_va_val_copy=yes,
        ac_cv_va_val_copy=no,
        ac_cv_va_val_copy=yes
    )
])
if test "x$ac_cv_va_copy" = "xyes"; then
    AC_DEFINE(VA_COPY, va_copy)
    AC_DEFINE(HAVE_VA_COPY)
elif test "x$ac_cv___va_copy" = "xyes"; then
    AC_DEFINE(VA_COPY, __va_copy)
    AC_DEFINE(HAVE_VA_COPY)
fi

if test "x$ac_cv_va_val_copy" = "xno"; then
   AC_DEFINE(HAVE_VA_LIST_AS_ARRAY)
fi
AC_MSG_RESULT($ac_cv_va_val_copy)

dnl ===================================================================
dnl ========================================================
dnl Put your C++ language/feature checks below
dnl ========================================================
AC_LANG_CPLUSPLUS

ARM_ABI_PREFIX=
HAVE_GCC3_ABI=
if test "$GNU_CC"; then
  if test "$CPU_ARCH" = "arm" ; then
    AC_CACHE_CHECK(for ARM EABI,
        ac_cv_gcc_arm_eabi,
        [AC_TRY_COMPILE([],
                        [
#if defined(__ARM_EABI__)
  return 0;
#else
#error Not ARM EABI.
#endif
                        ],
                        ac_cv_gcc_arm_eabi="yes",
                        ac_cv_gcc_arm_eabi="no")])
    if test "$ac_cv_gcc_arm_eabi" = "yes"; then
        HAVE_ARM_EABI=1
        ARM_ABI_PREFIX=eabi-
    else
        ARM_ABI_PREFIX=oabi-
    fi
  fi

  AC_CACHE_CHECK(for gcc 3.0 ABI,
      ac_cv_gcc_three_abi,
      [AC_TRY_COMPILE([],
                      [
#if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 /* G++ V3 ABI */
  return 0;
#else
#error Not gcc3.
#endif
                      ],
                      ac_cv_gcc_three_abi="yes",
                      ac_cv_gcc_three_abi="no")])
  if test "$ac_cv_gcc_three_abi" = "yes"; then
      TARGET_COMPILER_ABI="${TARGET_COMPILER_ABI-${ARM_ABI_PREFIX}gcc3}"
      HAVE_GCC3_ABI=1
  else
      TARGET_COMPILER_ABI="${TARGET_COMPILER_ABI-${ARM_ABI_PREFIX}gcc2}"
  fi
fi
AC_SUBST(HAVE_GCC3_ABI)

dnl Check for support of modern template specialization syntax
dnl Test code and requirement from scc@netscape.com.
dnl Autoconf cut-and-paste job by waterson@netscape.com
AC_CACHE_CHECK(for modern C++ template specialization syntax support,
               ac_cv_cpp_modern_specialize_template_syntax,
               [AC_TRY_COMPILE(template <class T> struct X { int a; };
                               class Y {};
                               template <> struct X<Y> { double a; };,
                               X<int> int_x;
                               X<Y> y_x;,
                               ac_cv_cpp_modern_specialize_template_syntax=yes,
                               ac_cv_cpp_modern_specialize_template_syntax=no)])
if test "$ac_cv_cpp_modern_specialize_template_syntax" = yes ; then
  AC_DEFINE(HAVE_CPP_MODERN_SPECIALIZE_TEMPLATE_SYNTAX)
fi


dnl Some compilers support only full specialization, and some don't.
AC_CACHE_CHECK(whether partial template specialization works,
               ac_cv_cpp_partial_specialization,
               [AC_TRY_COMPILE(template <class T> class Foo {};
                               template <class T> class Foo<T*> {};,
                               return 0;,
                               ac_cv_cpp_partial_specialization=yes,
                               ac_cv_cpp_partial_specialization=no)])
if test "$ac_cv_cpp_partial_specialization" = yes ; then
  AC_DEFINE(HAVE_CPP_PARTIAL_SPECIALIZATION)
fi

dnl Check to see if we can resolve ambiguity with |using|.
AC_CACHE_CHECK(whether the C++ \"using\" keyword resolves ambiguity,
               ac_cv_cpp_ambiguity_resolving_using,
               [AC_TRY_COMPILE(class X {
                                 public: int go(const X&) {return 3;}
                                         int jo(const X&) {return 3;}
                               };
                               class Y : public X {
                                 public:  int go(int) {return 2;}
                                          int jo(int) {return 2;}
                                          using X::jo;
                                 private: using X::go;
                               };,
                               X x; Y y; y.jo(x);,
                               ac_cv_cpp_ambiguity_resolving_using=yes,
                               ac_cv_cpp_ambiguity_resolving_using=no)])
if test "$ac_cv_cpp_ambiguity_resolving_using" = yes ; then
   AC_DEFINE(HAVE_CPP_AMBIGUITY_RESOLVING_USING)
fi

dnl See if a dynamic_cast to void* gives the most derived object.
AC_CACHE_CHECK(for C++ dynamic_cast to void*,
               ac_cv_cpp_dynamic_cast_void_ptr,
               [AC_TRY_RUN([class X { int i; public: virtual ~X() { } };
                            class Y { int j; public: virtual ~Y() { } };
                            class Z : public X, public Y { int k; };

                            int main() {
                                 Z mdo;
                                 X *subx = (X*)&mdo;
                                 Y *suby = (Y*)&mdo;
                                 return !((((void*)&mdo != (void*)subx) &&
                                           ((void*)&mdo == dynamic_cast<void*>(subx))) ||
                                          (((void*)&mdo != (void*)suby) &&
                                           ((void*)&mdo == dynamic_cast<void*>(suby))));
                            }],
                           ac_cv_cpp_dynamic_cast_void_ptr=yes,
                           ac_cv_cpp_dynamic_cast_void_ptr=no,
                           ac_cv_cpp_dynamic_cast_void_ptr=no)])
if test "$ac_cv_cpp_dynamic_cast_void_ptr" = yes ; then
   AC_DEFINE(HAVE_CPP_DYNAMIC_CAST_TO_VOID_PTR)
fi


dnl note that this one is reversed - if the test fails, then
dnl we require implementations of unused virtual methods. Which
dnl really blows because it means we'll have useless vtable
dnl bloat.
AC_CACHE_CHECK(whether C++ requires implementation of unused virtual methods,
               ac_cv_cpp_unused_required,
               [AC_TRY_LINK(class X {private: virtual void never_called();};,
                               X x;,
                               ac_cv_cpp_unused_required=no,
                               ac_cv_cpp_unused_required=yes)])
if test "$ac_cv_cpp_unused_required" = yes ; then
   AC_DEFINE(NEED_CPP_UNUSED_IMPLEMENTATIONS)
fi


dnl Some compilers have trouble comparing a constant reference to a templatized
dnl class to zero, and require an explicit operator==() to be defined that takes
dnl an int. This test separates the strong from the weak.

AC_CACHE_CHECK(for trouble comparing to zero near std::operator!=(),
               ac_cv_trouble_comparing_to_zero,
               [AC_TRY_COMPILE([#include <algorithm>
                                template <class T> class Foo {};
                                class T2;
                                template <class T> int operator==(const T2*, const T&) { return 0; }
                                template <class T> int operator!=(const T2*, const T&) { return 0; }],
                               [Foo<int> f; return (0 != f);],
                               ac_cv_trouble_comparing_to_zero=no,
                               ac_cv_trouble_comparing_to_zero=yes)])
if test "$ac_cv_trouble_comparing_to_zero" = yes ; then
  AC_DEFINE(HAVE_CPP_TROUBLE_COMPARING_TO_ZERO)
fi

# try harder, when checking for __thread support, see bug 521750 comment #33 and below
# We pass MOZ_OPTIMIZE_LDFLAGS to the linker because if dead_strip is
# enabled, the linker in xcode 4.1 will crash. Without this it would crash when
# linking XUL.
_SAVE_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS $DSO_PIC_CFLAGS $DSO_LDOPTS $MOZ_OPTIMIZE_LDFLAGS"
AC_CACHE_CHECK(for __thread keyword for TLS variables,
               ac_cv_thread_keyword,
               [AC_TRY_LINK([__thread bool tlsIsMainThread = false;],
                            [return tlsIsMainThread;],
                            ac_cv_thread_keyword=yes,
                            ac_cv_thread_keyword=no)])
LDFLAGS=$_SAVE_LDFLAGS
if test "$ac_cv_thread_keyword" = yes; then
  # mips builds fail with TLS variables because of a binutils bug.
  # See bug 528687
  case "${target}" in
    mips*-*)
      :
      ;;
    *-android*|*-linuxandroid*)
      :
      ;;
    *)
      AC_DEFINE(HAVE_THREAD_TLS_KEYWORD)
      ;;
  esac
fi

dnl Check for the existence of various allocation headers/functions

MALLOC_H=
AC_CHECK_HEADER(malloc.h,        [MALLOC_H=malloc.h])
if test "$MALLOC_H" = ""; then
  AC_CHECK_HEADER(malloc/malloc.h, [MALLOC_H=malloc/malloc.h])
  if test "$MALLOC_H" = ""; then
    AC_CHECK_HEADER(sys/malloc.h,    [MALLOC_H=sys/malloc.h])
  fi
fi
if test "$MALLOC_H" != ""; then
   AC_DEFINE_UNQUOTED(MALLOC_H, <$MALLOC_H>)
fi

MOZ_ALLOCATING_FUNCS="strndup posix_memalign memalign valloc"
AC_CHECK_FUNCS(strndup posix_memalign memalign valloc)

dnl See if compiler supports some gcc-style attributes

AC_CACHE_CHECK(for __attribute__((always_inline)),
               ac_cv_attribute_always_inline,
               [AC_TRY_COMPILE([inline void f(void) __attribute__((always_inline));],
                               [],
                               ac_cv_attribute_always_inline=yes,
                               ac_cv_attribute_always_inline=no)])

AC_CACHE_CHECK(for __attribute__((malloc)),
               ac_cv_attribute_malloc,
               [AC_TRY_COMPILE([void* f(int) __attribute__((malloc));],
                               [],
                               ac_cv_attribute_malloc=yes,
                               ac_cv_attribute_malloc=no)])

AC_CACHE_CHECK(for __attribute__((warn_unused_result)),
               ac_cv_attribute_warn_unused,
               [AC_TRY_COMPILE([int f(void) __attribute__((warn_unused_result));],
                               [],
                               ac_cv_attribute_warn_unused=yes,
                               ac_cv_attribute_warn_unused=no)])

AC_CACHE_CHECK(for __attribute__((noreturn)),
               ac_cv_attribute_noreturn,
               [AC_TRY_COMPILE([void f(void) __attribute__((noreturn));],
                               [],
                               ac_cv_attribute_noreturn=yes,
                               ac_cv_attribute_noreturn=no)])

dnl End of C++ language/feature checks
AC_LANG_C

dnl ========================================================
dnl =  Internationalization checks
dnl ========================================================
dnl
dnl Internationalization and Locale support is different
dnl on various UNIX platforms.  Checks for specific i18n
dnl features go here.

dnl check for LC_MESSAGES
AC_CACHE_CHECK(for LC_MESSAGES,
		ac_cv_i18n_lc_messages,
		[AC_TRY_COMPILE([#include <locale.h>],
				[int category = LC_MESSAGES;],
				ac_cv_i18n_lc_messages=yes,
				ac_cv_i18n_lc_messages=no)])
if test "$ac_cv_i18n_lc_messages" = yes; then
   AC_DEFINE(HAVE_I18N_LC_MESSAGES)
fi

AC_HAVE_FUNCS(localeconv)
fi # ! SKIP_COMPILER_CHECKS

TARGET_XPCOM_ABI=
if test -n "${CPU_ARCH}" -a -n "${TARGET_COMPILER_ABI}"; then
    TARGET_XPCOM_ABI="${CPU_ARCH}-${TARGET_COMPILER_ABI}"
fi

dnl Mozilla specific options
dnl ========================================================
dnl The macros used for command line options
dnl are defined in build/autoconf/altoptions.m4.

dnl If the compiler supports these attributes, define them as
dnl convenience macros.
if test "$ac_cv_attribute_always_inline" = yes ; then
  AC_DEFINE(NS_ALWAYS_INLINE, [__attribute__((always_inline))])
else
  AC_DEFINE(NS_ALWAYS_INLINE,)
fi

if test "$ac_cv_attribute_malloc" = yes ; then
  AC_DEFINE(NS_ATTR_MALLOC, [__attribute__((malloc))])
else
  AC_DEFINE(NS_ATTR_MALLOC,)
fi

if test "$ac_cv_attribute_warn_unused" = yes ; then
  AC_DEFINE(NS_WARN_UNUSED_RESULT, [__attribute__((warn_unused_result))])
else
  AC_DEFINE(NS_WARN_UNUSED_RESULT,)
fi

if test "$ac_cv_attribute_noreturn" = yes ; then
  AC_DEFINE(NS_NORETURN, [__attribute__((noreturn))])
else
  AC_DEFINE(NS_NORETURN,)
fi

dnl We can't run TRY_COMPILE tests on Windows, so hard-code some
dnl features that Windows actually does support.

if test -n "$SKIP_COMPILER_CHECKS"; then
   dnl Windows has malloc.h
   AC_DEFINE(MALLOC_H, [<malloc.h>])
   AC_DEFINE(HAVE_FORCEINLINE)
   AC_DEFINE(HAVE_LOCALECONV)
fi # SKIP_COMPILER_CHECKS

dnl ========================================================
dnl =
dnl = Check for external package dependencies
dnl =
dnl ========================================================
MOZ_ARG_HEADER(External Packages)

dnl ========================================================
dnl = Find the right NSPR to use.
dnl ========================================================
MOZ_ARG_WITH_BOOL(system-nspr,
[  --with-system-nspr      Use an NSPR that is already built and installed.
                          Use the 'nspr-config' script in the current path,
                          or look for the script in the directories given with
                          --with-nspr-exec-prefix or --with-nspr-prefix.
                          (Those flags are only checked if you specify
                          --with-system-nspr.)],
    _USE_SYSTEM_NSPR=1 )

MOZ_ARG_WITH_STRING(nspr-cflags,
[  --with-nspr-cflags=FLAGS
                          Pass FLAGS to CC when building code that uses NSPR.
                          Use this when there's no accurate nspr-config
                          script available.  This is the case when building
                          SpiderMonkey as part of the Mozilla tree: the
                          top-level configure script computes NSPR flags
                          that accomodate the quirks of that environment.],
    NSPR_CFLAGS=$withval)
MOZ_ARG_WITH_STRING(nspr-libs,
[  --with-nspr-libs=LIBS   Pass LIBS to LD when linking code that uses NSPR.
                          See --with-nspr-cflags for more details.],
    NSPR_LIBS=$withval)
AC_SUBST(NSPR_CFLAGS)
AC_SUBST(NSPR_LIBS)

dnl Pass either --with-system-nspr or (--with-nspr-cflags and
dnl --with-nspr-libs), but not both.
if test "$_USE_SYSTEM_NSPR" && (test "$NSPR_CFLAGS" -o "$NSPR_LIBS"); then
    AC_MSG_ERROR([--with-system-nspr and --with-nspr-libs/cflags are mutually exclusive.
See 'configure --help'.])
fi

dnl Top-level Mozilla switched to requiring NSPR 4.8.6 (bug 560582), but we don't need it in JS.
if test -n "$_USE_SYSTEM_NSPR"; then
    MOZ_NATIVE_NSPR=
    AM_PATH_NSPR(4.7.0, [MOZ_NATIVE_NSPR=1], [AC_MSG_ERROR([your don't have NSPR installed or your version is too old])])
fi

if test -n "$MOZ_NATIVE_NSPR"; then
    _SAVE_CFLAGS=$CFLAGS
    CFLAGS="$CFLAGS $NSPR_CFLAGS"
    AC_TRY_COMPILE([#include "prlog.h"],
                [#ifndef PR_STATIC_ASSERT
                 #error PR_STATIC_ASSERT not defined
                 #endif],
                [MOZ_NATIVE_NSPR=1],
                AC_MSG_ERROR([system NSPR does not support PR_STATIC_ASSERT]))
    CFLAGS=$_SAVE_CFLAGS
fi

dnl ========================================================
dnl system libffi Support
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(system-ffi,
[  --enable-system-ffi       Use system libffi (located with pkgconfig)],
    MOZ_NATIVE_FFI=1 )

if test -n "$MOZ_NATIVE_FFI"; then
    # Vanilla libffi 3.0.9 needs a few patches from upcoming version 3.0.10
    # for non-GCC compilers.
    if test -z "$GNU_CC"; then
        PKG_CHECK_MODULES(MOZ_FFI, libffi > 3.0.9)
    else
        PKG_CHECK_MODULES(MOZ_FFI, libffi >= 3.0.9)
    fi
fi

AC_SUBST(MOZ_NATIVE_FFI)

dnl ========================================================
dnl =
dnl = Application
dnl =
dnl ========================================================

MOZ_ARG_HEADER(Application)

ENABLE_TESTS=1

USE_ARM_KUSER=

case "${target}" in
    *-android*|*-linuxandroid*)
        USE_ARM_KUSER=1
        ;;
esac

dnl ========================================================
dnl Use ARM userspace kernel helpers; tell NSPR to enable
dnl their usage and use them in spidermonkey.
dnl ========================================================
MOZ_ARG_WITH_BOOL(arm-kuser,
[  --with-arm-kuser         Use kuser helpers (Linux/ARM only -- requires kernel 2.6.13 or later)],
    USE_ARM_KUSER=1,)
if test -n "$USE_ARM_KUSER"; then
   AC_DEFINE(USE_ARM_KUSER)
fi

dnl ========================================================
dnl =
dnl = Components & Features
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Components and Features)

dnl ========================================================
dnl = Localization
dnl ========================================================
MOZ_ARG_ENABLE_STRING(ui-locale,
[  --enable-ui-locale=ab-CD
                          Select the user interface locale (default: en-US)],
    MOZ_UI_LOCALE=$enableval )
AC_SUBST(MOZ_UI_LOCALE)

dnl ========================================================
dnl build the tests by default
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(tests,
[  --disable-tests         Do not build test libraries & programs],
    ENABLE_TESTS=,
    ENABLE_TESTS=1 )

dnl ========================================================
dnl =
dnl = Module specific options
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Individual module options)

dnl ========================================================
dnl = ARM toolchain tweaks
dnl ========================================================

dnl Defaults
case "${CPU_ARCH}-${OS_TARGET}" in
arm-Android)
    MOZ_THUMB=yes
    MOZ_ARCH=armv7-a
    MOZ_FPU=vfp
    MOZ_FLOAT_ABI=softfp
    ;;
arm-Darwin)
    MOZ_THUMB=yes
    ;;
arm-*)
    if test -n "$MOZ_PLATFORM_MAEMO"; then
        MOZ_THUMB=no
        MOZ_ARCH=armv7-a
        MOZ_FLOAT_ABI=softfp
    fi
    if test "$MOZ_PLATFORM_MAEMO" = 6; then
        MOZ_THUMB=yes
    fi
    ;;
esac

dnl Kept for compatibility with some buildbot mozconfig
MOZ_ARG_DISABLE_BOOL(thumb2, [], MOZ_THUMB=no, MOZ_THUMB=yes)

MOZ_ARG_WITH_STRING(thumb,
[  --with-thumb[[=yes|no|toolchain-default]]]
[                          Use Thumb instruction set (-mthumb)],
    if test -z "$GNU_CC"; then
        AC_MSG_ERROR([--with-thumb is not supported on non-GNU toolchain-defaults])
    fi
    MOZ_THUMB=$withval)

MOZ_ARG_WITH_STRING(thumb-interwork,
[  --with-thumb-interwork[[=yes|no|toolchain-default]]
                           Use Thumb/ARM instuctions interwork (-mthumb-interwork)],
    if test -z "$GNU_CC"; then
        AC_MSG_ERROR([--with-thumb-interwork is not supported on non-GNU toolchain-defaults])
    fi
    MOZ_THUMB_INTERWORK=$withval)

MOZ_ARG_WITH_STRING(arch,
[  --with-arch=[[type|toolchain-default]]
                           Use specific CPU features (-march=type)],
    if test -z "$GNU_CC"; then
        AC_MSG_ERROR([--with-arch is not supported on non-GNU toolchain-defaults])
    fi
    MOZ_ARCH=$withval)

MOZ_ARG_WITH_STRING(fpu,
[  --with-fpu=[[type|toolchain-default]]
                           Use specific FPU type (-mfpu=type)],
    if test -z "$GNU_CC"; then
        AC_MSG_ERROR([--with-fpu is not supported on non-GNU toolchain-defaults])
    fi
    MOZ_FPU=$withval)

MOZ_ARG_WITH_STRING(float-abi,
[  --with-float-abi=[[type|toolchain-default]]
                           Use specific arm float ABI (-mfloat-abi=type)],
    if test -z "$GNU_CC"; then
        AC_MSG_ERROR([--with-float-abi is not supported on non-GNU toolchain-defaults])
    fi
    MOZ_FLOAT_ABI=$withval)

MOZ_ARG_WITH_STRING(soft-float,
[  --with-soft-float[[=yes|no|toolchain-default]]
                           Use soft float library (-msoft-float)],
    if test -z "$GNU_CC"; then
        AC_MSG_ERROR([--with-soft-float is not supported on non-GNU toolchain-defaults])
    fi
    MOZ_SOFT_FLOAT=$withval)

case "$MOZ_ARCH" in
toolchain-default|"")
    arch_flag=""
    ;;
*)
    arch_flag="-march=$MOZ_ARCH"
    ;;
esac

case "$MOZ_THUMB" in
yes)
    MOZ_THUMB2=1
    thumb_flag="-mthumb"
    ;;
no)
    MOZ_THUMB2=
    thumb_flag="-marm"
    ;;
*)
    _SAVE_CFLAGS="$CFLAGS"
    CFLAGS="$arch_flag"
    AC_TRY_COMPILE([],[return sizeof(__thumb2__);],
        MOZ_THUMB2=1,
        MOZ_THUMB2=)
    CFLAGS="$_SAVE_CFLAGS"
    thumb_flag=""
    ;;
esac

if test "$MOZ_THUMB2" = 1; then
    AC_DEFINE(MOZ_THUMB2)
fi

case "$MOZ_THUMB_INTERWORK" in
yes)
    thumb_interwork_flag="-mthumb-interwork"
    ;;
no)
    thumb_interwork_flag="-mno-thumb-interwork"
    ;;
*) # toolchain-default
    thumb_interwork_flag=""
    ;;
esac

case "$MOZ_FPU" in
toolchain-default|"")
    fpu_flag=""
    ;;
*)
    fpu_flag="-mfpu=$MOZ_FPU"
    ;;
esac

case "$MOZ_FLOAT_ABI" in
toolchain-default|"")
    float_abi_flag=""
    ;;
*)
    float_abi_flag="-mfloat-abi=$MOZ_FLOAT_ABI"
    ;;
esac

case "$MOZ_SOFT_FLOAT" in
yes)
    soft_float_flag="-msoft-float"
    ;;
no)
    soft_float_flag="-mno-soft-float"
    ;;
*) # toolchain-default
    soft_float_flag=""
    ;;
esac

dnl Use echo to avoid accumulating space characters
all_flags=`echo $arch_flag $thumb_flag $thumb_interwork_flag $fpu_flag $float_abi_flag $soft_float_flag`
if test -n "$all_flags"; then
    _SAVE_CFLAGS="$CFLAGS"
    CFLAGS="$all_flags"
    AC_MSG_CHECKING(whether the chosen combination of compiler flags ($all_flags) works)
    AC_TRY_COMPILE([],[return 0;],
        AC_MSG_RESULT([yes]),
        AC_MSG_ERROR([no]))

    CFLAGS="$_SAVE_CFLAGS $all_flags"
    CXXFLAGS="$CXXFLAGS $all_flags"
    ASFLAGS="$ASFLAGS $all_flags"
    if test -n "$thumb_flag"; then
        LDFLAGS="$LDFLAGS $thumb_flag"
    fi
fi

AC_SUBST(MOZ_THUMB2)

if test "$CPU_ARCH" = "arm"; then
  AC_MSG_CHECKING(for ARM SIMD support in compiler)
  # We try to link so that this also fails when
  # building with LTO.
  AC_TRY_LINK([],
                 [asm("uqadd8 r1, r1, r2");],
                 result="yes", result="no")
  AC_MSG_RESULT("$result")
  if test "$result" = "yes"; then
      AC_DEFINE(HAVE_ARM_SIMD)
      HAVE_ARM_SIMD=1
  fi

  AC_MSG_CHECKING(for ARM NEON support in compiler)
  # We try to link so that this also fails when
  # building with LTO.
  AC_TRY_LINK([],
                 [asm(".fpu neon\n vadd.i8 d0, d0, d0");],
                 result="yes", result="no")
  AC_MSG_RESULT("$result")
  if test "$result" = "yes"; then
      AC_DEFINE(HAVE_ARM_NEON)
      HAVE_ARM_NEON=1
  fi
fi # CPU_ARCH = arm

AC_SUBST(HAVE_ARM_SIMD)
AC_SUBST(HAVE_ARM_NEON)

dnl ========================================================
dnl =
dnl = Debugging Options
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Debugging and Optimizations)

dnl ========================================================
dnl = Disable building with debug info.
dnl = Debugging is OFF by default
dnl ========================================================
if test -z "$MOZ_DEBUG_FLAGS"; then
  MOZ_DEBUG_FLAGS="-g"
fi

MOZ_ARG_ENABLE_STRING(debug,
[  --enable-debug[=DBG]    Enable building with developer debug info
                           (using compiler flags DBG)],
[ if test "$enableval" != "no"; then
    MOZ_DEBUG=1
    if test -n "$enableval" -a "$enableval" != "yes"; then
        MOZ_DEBUG_FLAGS=`echo $enableval | sed -e 's|\\\ | |g'`
        _MOZ_DEBUG_FLAGS_SET=1
    fi
  else
    MOZ_DEBUG=
  fi ],
  MOZ_DEBUG=)

MOZ_DEBUG_ENABLE_DEFS="-DDEBUG -D_DEBUG -DTRACING"
MOZ_ARG_WITH_STRING(debug-label,
[  --with-debug-label=LABELS
                          Define DEBUG_<value> for each comma-separated
                          value given.],
[ for option in `echo $withval | sed 's/,/ /g'`; do
    MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${option}"
done])

MOZ_DEBUG_DISABLE_DEFS="-DNDEBUG -DTRIMMED"

if test -n "$MOZ_DEBUG"; then
    AC_MSG_CHECKING([for valid debug flags])
    _SAVE_CFLAGS=$CFLAGS
    CFLAGS="$CFLAGS $MOZ_DEBUG_FLAGS"
    AC_TRY_COMPILE([#include <stdio.h>],
        [printf("Hello World\n");],
        _results=yes,
        _results=no)
    AC_MSG_RESULT([$_results])
    if test "$_results" = "no"; then
        AC_MSG_ERROR([These compiler flags are invalid: $MOZ_DEBUG_FLAGS])
    fi
    CFLAGS=$_SAVE_CFLAGS
fi

dnl ========================================================
dnl = Enable code optimization. ON by default.
dnl ========================================================
if test -z "$MOZ_OPTIMIZE_FLAGS"; then
	MOZ_OPTIMIZE_FLAGS="-O"
fi

MOZ_ARG_ENABLE_STRING(optimize,
[  --disable-optimize      Disable compiler optimization
  --enable-optimize=[OPT] Specify compiler optimization flags [OPT=-O]],
[ if test "$enableval" != "no"; then
    MOZ_OPTIMIZE=1
    if test -n "$enableval" -a "$enableval" != "yes"; then
        MOZ_OPTIMIZE_FLAGS=`echo "$enableval" | sed -e 's|\\\ | |g'`
        MOZ_OPTIMIZE=2
    fi
else
    MOZ_OPTIMIZE=
fi ], MOZ_OPTIMIZE=1)

if test "$COMPILE_ENVIRONMENT"; then
if test -n "$MOZ_OPTIMIZE"; then
    AC_MSG_CHECKING([for valid optimization flags])
    _SAVE_CFLAGS=$CFLAGS
    CFLAGS="$CFLAGS $MOZ_OPTIMIZE_FLAGS"
    AC_TRY_COMPILE([#include <stdio.h>],
        [printf("Hello World\n");],
        _results=yes,
        _results=no)
    AC_MSG_RESULT([$_results])
    if test "$_results" = "no"; then
        AC_MSG_ERROR([These compiler flags are invalid: $MOZ_OPTIMIZE_FLAGS])
    fi
    CFLAGS=$_SAVE_CFLAGS
fi
fi # COMPILE_ENVIRONMENT

AC_SUBST(MOZ_OPTIMIZE)
AC_SUBST(MOZ_OPTIMIZE_FLAGS)
AC_SUBST(MOZ_OPTIMIZE_LDFLAGS)
AC_SUBST(MOZ_OPTIMIZE_SIZE_TWEAK)
AC_SUBST(MOZ_PGO_OPTIMIZE_FLAGS)

dnl ========================================================
dnl = Enable generation of debug symbols
dnl ========================================================
MOZ_ARG_ENABLE_STRING(debug-symbols,
[  --enable-debug-symbols[=DBG]
                          Enable debugging symbols (using compiler flags DBG)],
[ if test "$enableval" != "no"; then
      MOZ_DEBUG_SYMBOLS=1
      if test -n "$enableval" -a "$enableval" != "yes"; then
          if test -z "$_MOZ_DEBUG_FLAGS_SET"; then
              MOZ_DEBUG_FLAGS=`echo $enableval | sed -e 's|\\\ | |g'`
          else
              AC_MSG_ERROR([--enable-debug-symbols flags cannot be used with --enable-debug flags])
          fi
      fi
  else
      MOZ_DEBUG_SYMBOLS=
  fi ],
  MOZ_DEBUG_SYMBOLS=1)

if test -n "$MOZ_DEBUG" -o -n "$MOZ_DEBUG_SYMBOLS"; then
    AC_DEFINE(MOZ_DEBUG_SYMBOLS)
    export MOZ_DEBUG_SYMBOLS
fi

dnl ========================================================
dnl = Disable any treating of compile warnings as errors
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(warnings-as-errors,
[  --disable-warnings-as-errors
                          Disable treating of warnings as errors],
    MOZ_DISABLE_WARNINGS_AS_ERRORS=1,
    MOZ_DISABLE_WARNINGS_AS_ERRORS= )
if test "$MOZ_DISABLE_WARNINGS_AS_ERRORS"; then
   WARNINGS_AS_ERRORS=''
fi

dnl ========================================================
dnl = Enable treating compile warnings as errors
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(sm-fail-on-warnings,
[  --enable-sm-fail-on-warnings
                          Enable warnings as errors],
    FAIL_ON_WARNINGS=1,
    FAIL_ON_WARNINGS= )

AC_SUBST(FAIL_ON_WARNINGS)

dnl = Enable trace malloc
dnl ========================================================
NS_TRACE_MALLOC=${MOZ_TRACE_MALLOC}
MOZ_ARG_ENABLE_BOOL(trace-malloc,
[  --enable-trace-malloc   Enable malloc tracing],
    NS_TRACE_MALLOC=1,
    NS_TRACE_MALLOC= )
if test "$NS_TRACE_MALLOC"; then
  # Please, Mr. Linker Man, don't take away our symbol names
  MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS=
  AC_DEFINE(NS_TRACE_MALLOC)
fi
AC_SUBST(NS_TRACE_MALLOC)

dnl ========================================================
dnl = Enable jemalloc
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(jemalloc,
[  --enable-jemalloc       Replace memory allocator with jemalloc],
    MOZ_MEMORY=1,
    MOZ_MEMORY=)

if test "$NS_TRACE_MALLOC"; then
    MOZ_MEMORY=
fi

if test "$MOZ_MEMORY"; then

  dnl Don't try to run compiler tests on Windows
  if test "$OS_ARCH" = "WINNT"; then
    if test -z "$HAVE_64BIT_OS"; then
      AC_DEFINE_UNQUOTED([MOZ_MEMORY_SIZEOF_PTR_2POW], 2)
    else
      AC_DEFINE_UNQUOTED([MOZ_MEMORY_SIZEOF_PTR_2POW], 3)
    fi
  else
    AC_CHECK_SIZEOF([int *], [4])
    case "${ac_cv_sizeof_int_p}" in
    4)
      AC_DEFINE_UNQUOTED([MOZ_MEMORY_SIZEOF_PTR_2POW], 2)
      ;;
    8)
      AC_DEFINE_UNQUOTED([MOZ_MEMORY_SIZEOF_PTR_2POW], 3)
      ;;
    *)
      AC_MSG_ERROR([Unexpected pointer size])
      ;;
    esac
  fi

  AC_DEFINE(MOZ_MEMORY)
  if test "x$MOZ_DEBUG" = "x1"; then
    AC_DEFINE(MOZ_MEMORY_DEBUG)
  fi
  dnl The generic feature tests that determine how to compute ncpus are long and
  dnl complicated.  Therefore, simply define special cpp variables for the
  dnl platforms we have special knowledge of.
  case "${target}" in
  *-darwin*)
    AC_DEFINE(MOZ_MEMORY_DARWIN)
    ;;
  *-*freebsd*)
    AC_DEFINE(MOZ_MEMORY_BSD)
    ;;
  *-android*|*-linuxandroid*)
    AC_DEFINE(MOZ_MEMORY_LINUX)
    AC_DEFINE(MOZ_MEMORY_ANDROID)
    ;;
  *-*linux*)
    AC_DEFINE(MOZ_MEMORY_LINUX)
    ;;
  *-netbsd*)
    AC_DEFINE(MOZ_MEMORY_BSD)
    ;;
  *-solaris*)
    AC_DEFINE(MOZ_MEMORY_SOLARIS)
    ;;
  *-mingw*)
    AC_DEFINE(MOZ_MEMORY_WINDOWS)
    # the interesting bits will get passed down in MOZ_MEMORY_LDFLAGS
    ;;
  *)
    AC_MSG_ERROR([--enable-jemalloc not supported on ${target}])
    ;;
  esac

  if test "$OS_ARCH" != "Darwin"; then
    dnl NB: this must be kept in sync with jemalloc.h
    AC_DEFINE(HAVE_JEMALLOC_VALLOC)
    AC_DEFINE(HAVE_JEMALLOC_POSIX_MEMALIGN)
    AC_DEFINE(HAVE_JEMALLOC_MEMALIGN)
  fi
fi
AC_SUBST(MOZ_MEMORY)
AC_SUBST(MOZ_MEMORY_LDFLAGS)

dnl ========================================================
dnl = Use malloc wrapper lib
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(wrap-malloc,
[  --enable-wrap-malloc    Wrap malloc calls (gnu linker only)],
    _WRAP_MALLOC=1,
    _WRAP_MALLOC= )

if test -n "$_WRAP_MALLOC"; then
    if test "$GNU_CC"; then
        WRAP_LDFLAGS="${WRAP_LDFLAGS} -Wl,--wrap=malloc,--wrap=calloc,--wrap=valloc,--wrap=free,--wrap=realloc,--wrap=memalign"
        WRAP_LDFLAGS="${WRAP_LDFLAGS} -Wl,--wrap=__builtin_new,--wrap=__builtin_vec_new,--wrap=__builtin_delete,--wrap=__builtin_vec_delete"
        WRAP_LDFLAGS="${WRAP_LDFLAGS} -Wl,--wrap=PR_Free,--wrap=PR_Malloc,--wrap=PR_Calloc,--wrap=PR_Realloc"
        WRAP_LDFLAGS="${WRAP_LDFLAGS} -Wl,--wrap=strdup,--wrap=strndup"
        WRAP_LDFLAGS="${WRAP_LDFLAGS} -Wl,--wrap=posix_memalign,--wrap=malloc_usable_size"
    else
        AC_MSG_ERROR([--enable-wrap-malloc is not supported for non-GNU toolchains])
    fi
fi

dnl ========================================================
dnl = Location of malloc wrapper lib
dnl ========================================================
MOZ_ARG_WITH_STRING(wrap-malloc,
[  --with-wrap-malloc=DIR  Location of malloc wrapper library],
    WRAP_LDFLAGS="${WRAP_LDFLAGS} $withval")

dnl ========================================================
dnl = Use JS Call tracing
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(trace-jscalls,
[  --enable-trace-jscalls  Enable JS call enter/exit callback (default=no)],
    MOZ_TRACE_JSCALLS=1,
    MOZ_TRACE_JSCALLS= )
if test -n "$MOZ_TRACE_JSCALLS"; then
    AC_DEFINE(MOZ_TRACE_JSCALLS)
fi

dnl ========================================================
dnl = Use TraceVis
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(tracevis,
[  --enable-tracevis       Enable TraceVis tracing tool (default=no)],
    MOZ_TRACEVIS=1,
    MOZ_TRACEVIS= )
if test -n "$MOZ_TRACEVIS"; then
    AC_DEFINE(MOZ_TRACEVIS)
    if test -z "$ENABLE_TRACEJIT"; then
       AC_MSG_ERROR([--enable-tracevis is incompatible with --disable-tracejit])
    fi
fi

dnl ========================================================
dnl = Use GCTimer
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(gctimer,
[  --enable-gctimer        Enable GC timer (default=no)],
    MOZ_GCTIMER=1,
    MOZ_GCTIMER= )
if test -n "$MOZ_GCTIMER"; then
    AC_DEFINE(MOZ_GCTIMER)
fi

dnl ========================================================
dnl = Don't enable GC-TestPilot plumbing
dnl ========================================================
JSGC_TESTPILOT=1
MOZ_ARG_DISABLE_BOOL(gctestpilot,
[  --disable-gctestpilot    Disable GC TestPilot study hooks],
    JSGC_TESTPILOT= )
if test -n "$JSGC_TESTPILOT"; then
    AC_DEFINE(JSGC_TESTPILOT)
fi

dnl ========================================================
dnl = Use Valgrind
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(valgrind,
[  --enable-valgrind       Enable Valgrind integration hooks (default=no)],
    MOZ_VALGRIND=1,
    MOZ_VALGRIND= )
if test -n "$MOZ_VALGRIND"; then
    AC_CHECK_HEADER([valgrind/valgrind.h], [],
        AC_MSG_ERROR(
            [--enable-valgrind specified but Valgrind is not installed]))
    AC_DEFINE(MOZ_VALGRIND)
    MOZ_VALGRIND=1
fi
AC_SUBST(MOZ_VALGRIND)

dnl ========================================================
dnl jprof
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(jprof,
[  --enable-jprof          Enable jprof profiling tool (needs mozilla/tools/jprof). Implies --enable-profiling.],
    MOZ_JPROF=1,
    MOZ_JPROF= )
if test -n "$MOZ_JPROF"; then
    MOZ_PROFILING=1
    AC_DEFINE(MOZ_JPROF)
fi

dnl ========================================================
dnl shark
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(shark,
[  --enable-shark          Enable shark remote profiling. Implies --enable-profiling.],
    MOZ_SHARK=1,
    MOZ_SHARK= )
if test -n "$MOZ_SHARK"; then
    MOZ_PROFILING=1
    AC_DEFINE(MOZ_SHARK)
fi

dnl ========================================================
dnl callgrind
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(callgrind,
[  --enable-callgrind      Enable callgrind profiling. Implies --enable-profiling.],
    MOZ_CALLGRIND=1,
    MOZ_CALLGRIND= )
if test -n "$MOZ_CALLGRIND"; then
    MOZ_PROFILING=1
    AC_DEFINE(MOZ_CALLGRIND)
fi

dnl ========================================================
dnl vtune
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(vtune,
[  --enable-vtune          Enable vtune profiling. Implies --enable-profiling.],
    MOZ_VTUNE=1,
    MOZ_VTUNE= )
if test -n "$MOZ_VTUNE"; then
    MOZ_PROFILING=1
    AC_DEFINE(MOZ_VTUNE)
fi

dnl ========================================================
dnl ETW - Event Tracing for Windows
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(ETW,
[  --enable-ETW            Enable ETW (Event Tracing for Windows) event reporting
                          (needs Windows Vista+ SDK)],
    MOZ_ETW=1,
    MOZ_ETW= )
if test -n "$MOZ_ETW"; then
    AC_DEFINE(MOZ_ETW)
    WINVER=600
fi

if test -n "$MOZ_ETW"; then
    if test -z "$MOZ_WINSDK_TARGETVER"; then
        AC_MSG_ERROR([--enable-ETW is only valid on Windows])
    elif test "$MOZ_WINSDK_TARGETVER" -lt "06000000"; then
        AC_MSG_ERROR([--enable-ETW requires the Windows Vista SDK or newer])
    fi
fi

dnl ========================================================
dnl Profiling
dnl ========================================================
if test -n "$MOZ_PROFILING"; then
    AC_DEFINE(MOZ_PROFILING)
fi

dnl ========================================================
dnl Zealous JavaScript GC
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(gczeal,
[  --enable-gczeal         Enable zealous GCing],
    JS_GC_ZEAL=1,
    JS_GC_ZEAL= )
if test -n "$JS_GC_ZEAL"; then
    AC_DEFINE(JS_GC_ZEAL)
fi

dnl ========================================================
dnl JS opt-mode assertions and minidump instrumentation
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(js-diagnostics,
[  --enable-js-diagnostics
                          Enable JS diagnostic assertions and breakpad data],
    JS_CRASH_DIAGNOSTICS=1,
    JS_CRASH_DIAGNOSTICS= )
if test -n "$JS_CRASH_DIAGNOSTICS"; then
    AC_DEFINE(JS_CRASH_DIAGNOSTICS)
fi

dnl ======================================================
dnl = Enable compiling with ccache
dnl ======================================================
MOZ_ARG_WITH_STRING(ccache,
[  --with-ccache[=path/to/ccache]
                          Enable compiling with ccache],
    CCACHE=$withval, CCACHE="no")

if test "$CCACHE" != "no"; then
    if test -z "$CCACHE" -o "$CCACHE" = "yes"; then
        CCACHE=
    else
        if test ! -e "$CCACHE"; then
            AC_MSG_ERROR([$CCACHE not found])
        fi
    fi
    MOZ_PATH_PROGS(CCACHE, $CCACHE ccache)
    if test -z "$CCACHE" -o "$CCACHE" = ":"; then
        AC_MSG_ERROR([ccache not found])
    elif test -x "$CCACHE"; then
        CC="$CCACHE $CC"
        CXX="$CCACHE $CXX"
    else
        AC_MSG_ERROR([$CCACHE is not executable])
    fi
fi

dnl ========================================================
dnl = Enable static checking using gcc-dehydra
dnl ========================================================

MOZ_ARG_WITH_STRING(static-checking,
[  --with-static-checking=path/to/gcc_dehydra.so
                          Enable static checking of code using GCC-dehydra],
    DEHYDRA_PATH=$withval,
    DEHYDRA_PATH= )

if test -n "$DEHYDRA_PATH"; then
    if test ! -f "$DEHYDRA_PATH"; then
        AC_MSG_ERROR([The dehydra plugin is not at the specified path.])
    fi
    AC_DEFINE(NS_STATIC_CHECKING)
fi
AC_SUBST(DEHYDRA_PATH)

dnl ========================================================
dnl = Enable stripping of libs & executables
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(strip,
[  --enable-strip          Enable stripping of libs & executables ],
    ENABLE_STRIP=1,
    ENABLE_STRIP= )

dnl ========================================================
dnl = Enable stripping of libs & executables when packaging
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(install-strip,
[  --enable-install-strip  Enable stripping of libs & executables when packaging ],
    PKG_SKIP_STRIP= ,
    PKG_SKIP_STRIP=1)

dnl ========================================================
dnl =
dnl = Profiling and Instrumenting
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Profiling and Instrumenting)

dnl ========================================================
dnl = Support for Quantify (Windows)
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(quantify,
[  --enable-quantify       Enable Quantify support (Windows only) ],
    MOZ_QUANTIFY=1,
    MOZ_QUANTIFY= )

dnl ========================================================
dnl = Support for demangling undefined symbols
dnl ========================================================
if test -z "$SKIP_LIBRARY_CHECKS"; then
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    AC_CHECK_FUNCS(__cxa_demangle, HAVE_DEMANGLE=1, HAVE_DEMANGLE=)
    AC_LANG_RESTORE
fi

# Demangle only for debug or trace-malloc builds
MOZ_DEMANGLE_SYMBOLS=
if test "$HAVE_DEMANGLE" -a "$HAVE_GCC3_ABI" && test "$MOZ_DEBUG" -o "$NS_TRACE_MALLOC"; then
    MOZ_DEMANGLE_SYMBOLS=1
    AC_DEFINE(MOZ_DEMANGLE_SYMBOLS)
fi
AC_SUBST(MOZ_DEMANGLE_SYMBOLS)

dnl ========================================================
dnl = Support for gcc stack unwinding (from gcc 3.3)
dnl ========================================================
if test "$HAVE_GCC3_ABI" -a -z "$SKIP_LIBRARY_CHECKS"; then
    AC_CHECK_HEADER(unwind.h, AC_CHECK_FUNCS(_Unwind_Backtrace))
fi

dnl ========================================================
dnl =
dnl = Misc. Options
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Misc. Options)

dnl ========================================================
dnl update xterm title
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(xterm-updates,
[  --enable-xterm-updates  Update XTERM titles with current command.],
    MOZ_UPDATE_XTERM=1,
    MOZ_UPDATE_XTERM= )

if test -z "$SKIP_COMPILER_CHECKS"; then
dnl ========================================================
dnl =
dnl = Compiler Options
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Compiler Options)

dnl ========================================================
dnl Check for gcc -pipe support
dnl ========================================================
AC_MSG_CHECKING([for gcc -pipe support])
if test -n "$GNU_CC" -a -n "$GNU_CXX" -a -n "$GNU_AS"; then
    echo '#include <stdio.h>' > dummy-hello.c
    echo 'int main() { printf("Hello World\n"); exit(0); }' >> dummy-hello.c
    ${CC} -S dummy-hello.c -o dummy-hello.s 2>&5
    cat dummy-hello.s 2> /dev/null | ${AS_BIN} -o dummy-hello.S - 2>&5
    if test $? = 0; then
        _res_as_stdin="yes"
    else
        _res_as_stdin="no"
    fi
    if test "$_res_as_stdin" = "yes"; then
        _SAVE_CFLAGS=$CFLAGS
        CFLAGS="$CFLAGS -pipe"
        AC_TRY_COMPILE( [ #include <stdio.h> ],
            [printf("Hello World\n");],
            [_res_gcc_pipe="yes"],
            [_res_gcc_pipe="no"] )
        CFLAGS=$_SAVE_CFLAGS
    fi
    if test "$_res_as_stdin" = "yes" -a "$_res_gcc_pipe" = "yes"; then
        _res="yes";
        CFLAGS="$CFLAGS -pipe"
        CXXFLAGS="$CXXFLAGS -pipe"
    else
        _res="no"
    fi
    rm -f dummy-hello.c dummy-hello.s dummy-hello.S dummy-hello a.out
    AC_MSG_RESULT([$_res])
else
    AC_MSG_RESULT([no])
fi

dnl ========================================================
dnl Profile guided optimization (gcc checks)
dnl ========================================================
dnl Test for profiling options
dnl Under gcc 3.4+, use -fprofile-generate/-fprofile-use

_SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fprofile-generate -fprofile-correction"

AC_MSG_CHECKING([whether C compiler supports -fprofile-generate])
AC_TRY_COMPILE([], [return 0;],
               [ PROFILE_GEN_CFLAGS="-fprofile-generate"
                 result="yes" ], result="no")
AC_MSG_RESULT([$result])

if test $result = "yes"; then
  PROFILE_GEN_LDFLAGS="-fprofile-generate"
  PROFILE_USE_CFLAGS="-fprofile-use -fprofile-correction -Wcoverage-mismatch"
  PROFILE_USE_LDFLAGS="-fprofile-use"
fi

CFLAGS="$_SAVE_CFLAGS"

if test -n "$INTEL_CC"; then
  PROFILE_GEN_CFLAGS="-prof-gen -prof-dir ."
  PROFILE_GEN_LDFLAGS=
  PROFILE_USE_CFLAGS="-prof-use -prof-dir ."
  PROFILE_USE_LDFLAGS=
fi

dnl Sun Studio on Solaris
if test "$SOLARIS_SUNPRO_CC"; then
  PROFILE_GEN_CFLAGS="-xprofile=collect:$_objdir/$enable_application"
  PROFILE_GEN_LDFLAGS="-xprofile=collect:$_objdir/$enable_application"
  PROFILE_USE_CFLAGS="-xprofile=use:$_objdir/$enable_application"
  PROFILE_USE_LDFLAGS="-xprofile=use:$_objdir/$enable_application"
fi

AC_SUBST(PROFILE_GEN_CFLAGS)
AC_SUBST(PROFILE_GEN_LDFLAGS)
AC_SUBST(PROFILE_USE_CFLAGS)
AC_SUBST(PROFILE_USE_LDFLAGS)

AC_LANG_CPLUSPLUS

dnl ========================================================
dnl Test for -pedantic bustage
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(pedantic,
[  --disable-pedantic      Issue all warnings demanded by strict ANSI C ],
_PEDANTIC= )
if test "$_PEDANTIC"; then
    _SAVE_CXXFLAGS=$CXXFLAGS
    CXXFLAGS="$CXXFLAGS ${_WARNINGS_CXXFLAGS} ${_COMPILER_PREFIX}-pedantic ${_COMPILER_PREFIX}-Wno-long-long"
    AC_MSG_CHECKING([whether C++ compiler has -pedantic long long bug])
    AC_TRY_COMPILE([$configure_static_assert_macros],
                   [CONFIGURE_STATIC_ASSERT(sizeof(long long) == 8)],
                   result="no", result="yes" )
    AC_MSG_RESULT([$result])
    CXXFLAGS="$_SAVE_CXXFLAGS"

    case "$result" in
    no)
        _WARNINGS_CFLAGS="${_WARNINGS_CFLAGS} ${_COMPILER_PREFIX}-pedantic ${_COMPILER_PREFIX}-Wno-long-long"
        _WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} ${_COMPILER_PREFIX}-pedantic ${_COMPILER_PREFIX}-Wno-long-long"
        ;;
    yes)
        AC_MSG_ERROR([Your compiler appears to have a known bug where long long is miscompiled when using -pedantic.  Reconfigure using --disable-pedantic. ])
        ;;
    esac
fi

dnl ========================================================
dnl Autoconf test for gcc 2.7.2.x (and maybe others?) so that we don't
dnl provide non-const forms of the operator== for comparing nsCOMPtrs to
dnl raw pointers in nsCOMPtr.h.  (VC++ has the same bug.)
dnl ========================================================
_SAVE_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$CXXFLAGS ${_WARNINGS_CXXFLAGS}"
AC_CACHE_CHECK(for correct overload resolution with const and templates,
    ac_nscap_nonconst_opeq_bug,
    [AC_TRY_COMPILE([
                      template <class T>
                      class Pointer
                        {
                        public:
                          T* myPtr;
                        };

                      template <class T, class U>
                      int operator==(const Pointer<T>& rhs, U* lhs)
                        {
                          return rhs.myPtr == lhs;
                        }

                      template <class T, class U>
                      int operator==(const Pointer<T>& rhs, const U* lhs)
                        {
                          return rhs.myPtr == lhs;
                        }
                    ],
                    [
                      Pointer<int> foo;
                      const int* bar;
                      return foo == bar;
                    ],
                    ac_nscap_nonconst_opeq_bug="no",
                    ac_nscap_nonconst_opeq_bug="yes")])
CXXFLAGS="$_SAVE_CXXFLAGS"

if test "$ac_nscap_nonconst_opeq_bug" = "yes" ; then
    AC_DEFINE(NSCAP_DONT_PROVIDE_NONCONST_OPEQ)
fi

dnl ========================================================
dnl Check for tm_zone, tm_gmtoff in struct tm
dnl ========================================================
AC_CACHE_CHECK(for tm_zone tm_gmtoff in struct tm,
    ac_cv_struct_tm_zone_tm_gmtoff,
    [AC_TRY_COMPILE([#include <time.h>],
                    [struct tm tm; tm.tm_zone = 0; tm.tm_gmtoff = 1;],
                    [ac_cv_struct_tm_zone_tm_gmtoff="yes"],
                    [ac_cv_struct_tm_zone_tm_gmtoff="no"])])
if test "$ac_cv_struct_tm_zone_tm_gmtoff" = "yes" ; then
    AC_DEFINE(HAVE_TM_ZONE_TM_GMTOFF)
fi
fi # ! SKIP_COMPILER_CHECKS

dnl ========================================================
dnl C++ rtti
dnl Should be smarter and check that the compiler does indeed have rtti
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(cpp-rtti,
[  --enable-cpp-rtti       Enable C++ RTTI ],
[ _MOZ_USE_RTTI=1 ],
[ _MOZ_USE_RTTI= ])

if test "$_MOZ_USE_RTTI"; then
   _MOZ_RTTI_FLAGS=$_MOZ_RTTI_FLAGS_ON
else
   _MOZ_RTTI_FLAGS=$_MOZ_RTTI_FLAGS_OFF
fi

AC_SUBST(_MOZ_RTTI_FLAGS_ON)

dnl ========================================================
dnl C++ exceptions (g++/VC/Sun only - for now)
dnl Should be smarter and check that the compiler does indeed have exceptions
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(cpp-exceptions,
[  --enable-cpp-exceptions Enable C++ exceptions ],
[ _MOZ_CPP_EXCEPTIONS=1 ],
[ _MOZ_CPP_EXCEPTIONS= ])

if test "$_MOZ_CPP_EXCEPTIONS"; then
    _MOZ_EXCEPTIONS_FLAGS=$_MOZ_EXCEPTIONS_FLAGS_ON
    AC_DEFINE(MOZ_CPP_EXCEPTIONS)
else
    _MOZ_EXCEPTIONS_FLAGS=$_MOZ_EXCEPTIONS_FLAGS_OFF
fi

AC_SUBST(_MOZ_EXCEPTIONS_FLAGS_ON)

# OSF native compilers do not like exception declarations
# when exceptions are disabled
if test -n "$COMPAQ_CXX" -o -n "$VACPP"; then
    AC_DEFINE(CPP_THROW_NEW, [])
else
    AC_DEFINE(CPP_THROW_NEW, [throw()])
fi
AC_LANG_C

dnl ========================================================
dnl =
dnl = Check what kind of list files are supported by the
dnl = linker
dnl =
dnl ========================================================

AC_CACHE_CHECK(what kind of list files are supported by the linker,
    EXPAND_LIBS_LIST_STYLE,
    [echo "int main() {return 0;}" > conftest.${ac_ext}
     if AC_TRY_COMMAND(${CC-cc} -o conftest.${OBJ_SUFFIX} -c $CFLAGS $CPPFLAGS conftest.${ac_ext} 1>&2) && test -s conftest.${OBJ_SUFFIX}; then
         echo "INPUT(conftest.${OBJ_SUFFIX})" > conftest.list
         if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS conftest.list $LIBS 1>&2) && test -s conftest${ac_exeext}; then
             EXPAND_LIBS_LIST_STYLE=linkerscript
         else
             echo "conftest.${OBJ_SUFFIX}" > conftest.list
             if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS @conftest.list $LIBS 1>&2) && test -s conftest${ac_exeext}; then
                 EXPAND_LIBS_LIST_STYLE=list
             else
                 EXPAND_LIBS_LIST_STYLE=none
             fi
         fi
     else
         dnl We really don't expect to get here, but just in case
         AC_ERROR([couldn't compile a simple C file])
     fi
     rm -rf conftest*])

LIBS_DESC_SUFFIX=desc
AC_SUBST(LIBS_DESC_SUFFIX)
AC_SUBST(EXPAND_LIBS_LIST_STYLE)

dnl ========================================================
dnl =
dnl = Build depencency options
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Build dependencies)

dnl ========================================================
dnl = Do not auto generate dependency info
dnl ========================================================
MOZ_AUTO_DEPS=1
MOZ_ARG_DISABLE_BOOL(auto-deps,
[  --disable-auto-deps     Do not automatically generate dependency info],
    MOZ_AUTO_DEPS=,
    MOZ_AUTO_DEPS=1)

if test -n "$MOZ_AUTO_DEPS"; then
dnl ========================================================
dnl = Use mkdepend instead of $CC -MD for dependency generation
dnl ========================================================
_cpp_md_flag=
MOZ_ARG_DISABLE_BOOL(md,
[  --disable-md            Do not use compiler-based dependencies ],
  [_cpp_md_flag=],
  [_cpp_md_flag=1],
  [dnl Default is to turn on -MD if using GNU-compatible compilers
   if test "$GNU_CC" -a "$GNU_CXX"; then
     _cpp_md_flag=1
   fi
  dnl Default is to use -xM if using Sun Studio on Solaris
   if test "$SOLARIS_SUNPRO_CC"; then
     _cpp_md_flag=1
   fi])
if test "$_cpp_md_flag"; then
  COMPILER_DEPEND=1
  _DEPEND_CFLAGS='$(filter-out %/.pp,-MD -MF $(MDDEPDIR)/$(basename $(@F)).pp)'
  dnl Sun Studio on Solaris use -xM instead of -MD, see config/rules.mk
  if test "$SOLARIS_SUNPRO_CC"; then
    _DEPEND_CFLAGS=
  fi
else
  COMPILER_DEPEND=
  dnl Don't override this for MSVC
  if test -z "$_WIN32_MSVC"; then
    _USE_CPP_INCLUDE_FLAG=
    _DEFINES_CFLAGS='$(ACDEFINES) -D_JS_CONFDEFS_H_ -DMOZILLA_CLIENT'
    _DEFINES_CXXFLAGS='$(ACDEFINES) -D_JS_CONFDEFS_H_ -DMOZILLA_CLIENT'
  else
    echo '#include <stdio.h>' > dummy-hello.c
    changequote(,)
    CL_INCLUDES_PREFIX=`"${CC}" -showIncludes -c -Fonul dummy-hello.c 2>&1 | sed -ne 's/^\([^:]*:[^:]*:\).*stdio.h$/\1/p'`
    changequote([,])
    if test -z "$CL_INCLUDES_PREFIX"; then
        AC_MSG_ERROR([Cannot find cl -showIncludes prefix.])
    fi
    AC_SUBST(CL_INCLUDES_PREFIX)
    rm -f dummy-hello.c
    _topsrcdirwin=`cd \`dirname $0\`; pwd -W`
    dnl cl.py provides dependency generation for MSVC
    CC_WRAPPER="$PYTHON -O $_topsrcdirwin/build/cl.py"
    CXX_WRAPPER="$PYTHON -O $_topsrcdirwin/build/cl.py"
    COMPILER_DEPEND=1
  fi
fi
fi # MOZ_AUTO_DEPS
MDDEPDIR='.deps'
AC_SUBST(MOZ_AUTO_DEPS)
AC_SUBST(COMPILER_DEPEND)
AC_SUBST(MDDEPDIR)
AC_SUBST(CC_WRAPPER)
AC_SUBST(CXX_WRAPPER)


dnl ========================================================
dnl = Link js shell to system readline
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(readline,
[  --enable-readline       Link js shell to system readline library],
    JS_WANT_READLINE=1,
    JS_WANT_READLINE= )

JS_NATIVE_EDITLINE=
EDITLINE_LIBS=
JS_DISABLE_SHELL=

case "$target" in
*-mingw*)
    NO_EDITLINE=1
    ;;
*-symbian*)
    NO_EDITLINE=1
    JS_DISABLE_SHELL=1
    ;;
*)
    ;;
esac

if test -z "$SKIP_LIBRARY_CHECKS" -a -z "$NO_EDITLINE"; then
  if test -n "$JS_WANT_READLINE"; then
    AC_CHECK_LIB(readline, readline,
                 EDITLINE_LIBS="-lreadline",
                 AC_MSG_ERROR([No system readline library found.]))
  else
    dnl By default, we use editline
    JS_NATIVE_EDITLINE=1
    EDITLINE_LIBS='$(DEPTH)/editline/$(LIB_PREFIX)editline.$(LIB_SUFFIX)'
  fi

  dnl Either way, we want to build with line editing support.
  AC_DEFINE(EDITLINE)
fi
AC_SUBST(JS_NATIVE_EDITLINE)
AC_SUBST(JS_DISABLE_SHELL)
AC_SUBST(EDITLINE_LIBS)

dnl ========================================================
dnl =
dnl = Standalone module options
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Standalone module options (Not for building Mozilla))

dnl ========================================================
dnl = Build jsctypes if it's enabled
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(ctypes,
[  --enable-ctypes         Enable js-ctypes (default=no)],
    JS_HAS_CTYPES=1,
    JS_HAS_CTYPES= )
AC_SUBST(JS_HAS_CTYPES)
if test "$JS_HAS_CTYPES"; then
  dnl Error out if we're on MSVC and MASM is unavailable.
  if test -n "$_MSC_VER" -a \( "$AS" != "ml.exe" -a "$AS" != "ml64.exe" \); then
    AC_MSG_ERROR([\"$AS\" is not a suitable assembler to build js-ctypes. If you are building with MS Visual Studio 8 Express, you may download the MASM 8.0 package, upgrade to Visual Studio 9 Express, or install the Vista SDK. Or do not use --enable-ctypes.])
  fi
  AC_DEFINE(JS_HAS_CTYPES)
fi

if test "$MOZ_DEBUG" -o "$NS_TRACE_MALLOC"; then
    MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS=
fi

MOZ_ARG_WITH_STRING(sync-build-files,
[  --with-sync-build-files=DIR
                          Check that files in 'config' and 'build' match
                          their originals in 'DIR/config' and 'DIR/build'.
                          This helps keep the SpiderMonkey build machinery
                          in sync with Mozilla's, on which it is based.],
[MOZ_SYNC_BUILD_FILES=$withval ] )
AC_SUBST(MOZ_SYNC_BUILD_FILES)

dnl ========================================================
dnl =
dnl = Maintainer debug option (no --enable equivalent)
dnl =
dnl ========================================================

AC_SUBST(AR)
AC_SUBST(AR_FLAGS)
AC_SUBST(AR_LIST)
AC_SUBST(AR_EXTRACT)
AC_SUBST(AR_DELETE)
AC_SUBST(AS)
AC_SUBST(ASFLAGS)
AC_SUBST(AS_DASH_C_FLAG)
AC_SUBST(LD)
AC_SUBST(RC)
AC_SUBST(RCFLAGS)
AC_SUBST(MC)
AC_SUBST(WINDRES)
AC_SUBST(IMPLIB)
AC_SUBST(FILTER)
AC_SUBST(BIN_FLAGS)
AC_SUBST(NS_USE_NATIVE)
AC_SUBST(MOZ_JS_LIBS)
AC_SUBST(MOZ_PSM)
AC_SUBST(MOZ_DEBUG)
AC_SUBST(MOZ_DEBUG_SYMBOLS)
AC_SUBST(MOZ_DEBUG_ENABLE_DEFS)
AC_SUBST(MOZ_DEBUG_DISABLE_DEFS)
AC_SUBST(MOZ_DEBUG_FLAGS)
AC_SUBST(MOZ_DEBUG_LDFLAGS)
AC_SUBST(WARNINGS_AS_ERRORS)
AC_SUBST(MOZ_LEAKY)
AC_SUBST(MOZ_JPROF)
AC_SUBST(MOZ_SHARK)
AC_SUBST(MOZ_CALLGRIND)
AC_SUBST(MOZ_VTUNE)
AC_SUBST(MOZ_ETW)
AC_SUBST(MOZ_PROFILING)
AC_SUBST(MOZ_QUANTIFY)
AC_SUBST(LIBICONV)

AC_SUBST(ENABLE_TESTS)

AC_SUBST(ENABLE_STRIP)
AC_SUBST(PKG_SKIP_STRIP)
AC_SUBST(INCREMENTAL_LINKER)
AC_SUBST(MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS)
AC_SUBST(MOZ_COMPONENT_NSPR_LIBS)

AC_SUBST(MOZ_FIX_LINK_PATHS)

AC_SUBST(USE_DEPENDENT_LIBS)

AC_SUBST(MOZ_BUILD_ROOT)
AC_SUBST(MOZ_OS2_TOOLS)

AC_SUBST(MOZ_POST_DSO_LIB_COMMAND)
AC_SUBST(MOZ_POST_PROGRAM_COMMAND)

AC_SUBST(MOZ_APP_NAME)
AC_SUBST(MOZ_APP_DISPLAYNAME)
AC_SUBST(MOZ_APP_UA_NAME)
AC_SUBST(MOZ_APP_VERSION)
AC_SUBST(FIREFOX_VERSION)

AC_SUBST(MOZ_PKG_SPECIAL)

AC_SUBST(MOZILLA_OFFICIAL)

dnl win32 options
AC_SUBST(MOZ_MAPINFO)
AC_SUBST(MOZ_BROWSE_INFO)
AC_SUBST(MOZ_TOOLS_DIR)
AC_SUBST(PYTHON)

dnl Echo the CFLAGS to remove extra whitespace.
CFLAGS=`echo \
	$_WARNINGS_CFLAGS \
	$CFLAGS`

CXXFLAGS=`echo \
	$_MOZ_RTTI_FLAGS \
	$_MOZ_EXCEPTIONS_FLAGS \
	$_WARNINGS_CXXFLAGS \
	$CXXFLAGS`

COMPILE_CFLAGS=`echo \
    $_DEFINES_CFLAGS \
	$_DEPEND_CFLAGS \
    $COMPILE_CFLAGS`

COMPILE_CXXFLAGS=`echo \
    $_DEFINES_CXXFLAGS \
	$_DEPEND_CFLAGS \
    $COMPILE_CXXFLAGS`

AC_SUBST(SYSTEM_MAKEDEPEND)

AC_SUBST(NSPR_CFLAGS)
AC_SUBST(NSPR_LIBS)
AC_SUBST(MOZ_NATIVE_NSPR)

AC_SUBST(CFLAGS)
AC_SUBST(CXXFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(COMPILE_CFLAGS)
AC_SUBST(COMPILE_CXXFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(LIBS)
AC_SUBST(CROSS_COMPILE)

AC_SUBST(HOST_CC)
AC_SUBST(HOST_CXX)
AC_SUBST(HOST_CFLAGS)
AC_SUBST(HOST_CXXFLAGS)
AC_SUBST(HOST_LDFLAGS)
AC_SUBST(HOST_OPTIMIZE_FLAGS)
AC_SUBST(HOST_AR)
AC_SUBST(HOST_AR_FLAGS)
AC_SUBST(HOST_LD)
AC_SUBST(HOST_RANLIB)
AC_SUBST(HOST_NSPR_MDCPUCFG)
AC_SUBST(HOST_BIN_SUFFIX)
AC_SUBST(HOST_OS_ARCH)

AC_SUBST(TARGET_CPU)
AC_SUBST(TARGET_VENDOR)
AC_SUBST(TARGET_OS)
AC_SUBST(TARGET_NSPR_MDCPUCFG)
AC_SUBST(TARGET_MD_ARCH)
AC_SUBST(TARGET_XPCOM_ABI)
AC_SUBST(OS_TARGET)
AC_SUBST(OS_ARCH)
AC_SUBST(OS_RELEASE)
AC_SUBST(OS_TEST)
AC_SUBST(CPU_ARCH)
AC_SUBST(INTEL_ARCHITECTURE)

AC_SUBST(WRAP_LDFLAGS)
AC_SUBST(MKSHLIB)
AC_SUBST(MKCSHLIB)
AC_SUBST(MKSHLIB_FORCE_ALL)
AC_SUBST(MKSHLIB_UNFORCE_ALL)
AC_SUBST(DSO_CFLAGS)
AC_SUBST(DSO_PIC_CFLAGS)
AC_SUBST(DSO_LDOPTS)
AC_SUBST(LIB_PREFIX)
AC_SUBST(DLL_PREFIX)
AC_SUBST(DLL_SUFFIX)
AC_DEFINE_UNQUOTED(MOZ_DLL_SUFFIX, "$DLL_SUFFIX")
AC_SUBST(LIB_SUFFIX)
AC_SUBST(OBJ_SUFFIX)
AC_SUBST(BIN_SUFFIX)
AC_SUBST(ASM_SUFFIX)
AC_SUBST(IMPORT_LIB_SUFFIX)
AC_SUBST(USE_N32)
AC_SUBST(CC_VERSION)
AC_SUBST(CXX_VERSION)
AC_SUBST(MSMANIFEST_TOOL)

AC_MSG_CHECKING([for posix_fallocate])
AC_TRY_LINK([#define _XOPEN_SOURCE 600
  #include <fcntl.h>],
                 [posix_fallocate(0, 0, 0);],
                 [ac_cv___posix_fallocate=true],
                 [ac_cv___posix_fallocate=false])

if test "$ac_cv___posix_fallocate" = true ; then
  AC_DEFINE(HAVE_POSIX_FALLOCATE)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

dnl Check for missing components
if test "$COMPILE_ENVIRONMENT"; then
if test "$MOZ_X11"; then
    dnl ====================================================
    dnl = Check if X headers exist
    dnl ====================================================
    _SAVE_CFLAGS=$CFLAGS
    CFLAGS="$CFLAGS $XCFLAGS"
    AC_TRY_COMPILE([
        #include <stdio.h>
        #include <stdlib.h>
        #include <X11/Xlib.h>
        #include <X11/Intrinsic.h>
    ],
    [
        Display *dpy = 0;
        if ((dpy = XOpenDisplay(NULL)) == NULL) {
            fprintf(stderr, ": can't open %s\n", XDisplayName(NULL));
            exit(1);
        }
    ], [],
    [ AC_MSG_ERROR([Could not compile basic X program.]) ])
    CFLAGS="$_SAVE_CFLAGS"

    if test -n "$MISSING_X"; then
        AC_MSG_ERROR([ Could not find the following X libraries: $MISSING_X ]);
    fi

fi # MOZ_X11
fi # COMPILE_ENVIRONMENT

dnl Set various defines and substitutions
dnl ========================================================

if test "$OS_ARCH" = "Darwin"; then
  AC_DEFINE(XP_MACOSX)
  AC_DEFINE(XP_UNIX)
  AC_DEFINE(UNIX_ASYNC_DNS)
elif test "$OS_ARCH" != "WINNT" -a "$OS_ARCH" != "OS2"; then
  AC_DEFINE(XP_UNIX)
  AC_DEFINE(UNIX_ASYNC_DNS)
fi

AC_ARG_ENABLE(threadsafe,
              [  --enable-threadsafe     Enable support for multiple threads.],
              [AC_DEFINE(JS_THREADSAFE)],)

if test "$MOZ_DEBUG"; then
    AC_DEFINE(MOZ_REFLOW_PERF)
    AC_DEFINE(MOZ_REFLOW_PERF_DSP)
fi

if test "$ACCESSIBILITY" -a "$MOZ_ENABLE_GTK2" ; then
    AC_DEFINE(MOZ_ACCESSIBILITY_ATK)
    ATK_FULL_VERSION=`$PKG_CONFIG --modversion atk`
    ATK_MAJOR_VERSION=`echo ${ATK_FULL_VERSION} | $AWK -F\. '{ print $1 }'`
    ATK_MINOR_VERSION=`echo ${ATK_FULL_VERSION} | $AWK -F\. '{ print $2 }'`
    ATK_REV_VERSION=`echo ${ATK_FULL_VERSION} | $AWK -F\. '{ print $3 }'`
    AC_DEFINE_UNQUOTED(ATK_MAJOR_VERSION, $ATK_MAJOR_VERSION)
    AC_DEFINE_UNQUOTED(ATK_MINOR_VERSION, $ATK_MINOR_VERSION)
    AC_DEFINE_UNQUOTED(ATK_REV_VERSION, $ATK_REV_VERSION)
fi

dnl ========================================================
dnl JavaScript shell
dnl ========================================================

AC_HAVE_FUNCS(setlocale)
AC_HAVE_FUNCS(localeconv)

case "$host_os" in
mingw*)
    WIN_TOP_SRC=`cd $srcdir; pwd -W`
    ;;
esac

AC_SUBST(WIN_TOP_SRC)

AC_SUBST(MOZILLA_VERSION)

AC_SUBST(ac_configure_args)

dnl Spit out some output
dnl ========================================================

# Save the defines header file before autoconf removes it.
# (Do not add AC_DEFINE calls after this line.)
  _CONFIG_TMP=confdefs-tmp.h
  _CONFIG_DEFS_H=js-confdefs.h

  cat > $_CONFIG_TMP <<\EOF
/* List of defines generated by configure. Included with preprocessor flag,
 * -include, to avoid long list of -D defines on the compile command-line.
 * Do not edit.
 */

#ifndef _JS_CONFDEFS_H_
#define _JS_CONFDEFS_H_
EOF

_EGREP_PATTERN='^#define ('
if test -n "$_NON_GLOBAL_ACDEFINES"; then
    for f in $_NON_GLOBAL_ACDEFINES; do
        _EGREP_PATTERN="${_EGREP_PATTERN}$f|"
    done
fi
_EGREP_PATTERN="${_EGREP_PATTERN}dummy_never_defined)"

  sort confdefs.h | egrep -v "$_EGREP_PATTERN" >> $_CONFIG_TMP

  if test "$?" != 0; then
    AC_MSG_ERROR([Error outputting config definitions])
  fi

  cat >> $_CONFIG_TMP <<\EOF

/* The c99 defining the limit macros (UINT32_MAX for example), says:
 * C++ implementations should define these macros only when __STDC_LIMIT_MACROS
 * is defined before <stdint.h> is included. */
#define __STDC_LIMIT_MACROS

#endif /* _JS_CONFDEFS_H_ */

EOF

  # Only write js-confdefs.h when something changes (or it doesn't exist)
  if cmp -s $_CONFIG_TMP $_CONFIG_DEFS_H; then
    rm $_CONFIG_TMP
  else
    AC_MSG_RESULT("creating $_CONFIG_DEFS_H")
    mv -f $_CONFIG_TMP $_CONFIG_DEFS_H

    echo ==== $_CONFIG_DEFS_H =================================
    cat $_CONFIG_DEFS_H
  fi

dnl Probably shouldn't call this manually but we always want the output of DEFS
rm -f confdefs.h.save
mv confdefs.h confdefs.h.save
egrep -v "$_EGREP_PATTERN" confdefs.h.save > confdefs.h
if test "$?" != 0; then
  AC_MSG_ERROR([Error outputting confdefs.h])
fi
AC_OUTPUT_MAKE_DEFS()
MOZ_DEFINES=$DEFS
AC_SUBST(MOZ_DEFINES)
rm -f confdefs.h
mv confdefs.h.save confdefs.h

MAKEFILES="
  Makefile
  shell/Makefile
  lirasm/Makefile
  jsapi-tests/Makefile
  tests/Makefile
  config/Makefile
  config/autoconf.mk
  config/expandlibs_config.py
  config/mkdepend/Makefile
"

if test -n "$JS_NATIVE_EDITLINE"; then
   MAKEFILES="$MAKEFILES
editline/Makefile
"
fi

dnl
dnl Run a perl script to quickly create the makefiles.
dnl If it succeeds, it outputs a shell command to set CONFIG_FILES
dnl   for the files it cannot handle correctly. This way, config.status
dnl   will handle these files.
dnl If it fails, nothing is set and config.status will run as usual.
dnl
dnl This does not change the $MAKEFILES variable.
dnl
echo $MAKEFILES | ${PERL} $srcdir/build/autoconf/acoutput-fast.pl > conftest.sh
. ./conftest.sh
rm conftest.sh

echo $MAKEFILES > unallmakefiles

mv -f config/autoconf.mk config/autoconf.mk.orig 2> /dev/null

AC_OUTPUT($MAKEFILES)

dnl Prevent the regeneration of autoconf.mk forcing rebuilds of the world
if cmp -s config/autoconf.mk config/autoconf.mk.orig; then
  echo "config/autoconf.mk is unchanged"
  mv -f config/autoconf.mk.orig config/autoconf.mk 2> /dev/null
else
  rm -f config/autoconf.mk.orig 2> /dev/null
fi

# Produce the js-config script at configure time; see the comments for
# 'js-config' in Makefile.in.
AC_MSG_RESULT(invoking make to create js-config script)
$GMAKE js-config

# Build jsctypes if it's enabled.
if test "$JS_HAS_CTYPES" -a -z "$MOZ_NATIVE_FFI"; then
  # Run the libffi 'configure' script.
  ac_configure_args="--disable-shared --enable-static --disable-raw-api"
  if test "$MOZ_DEBUG"; then
    ac_configure_args="$ac_configure_args --enable-debug"
  fi
  if test "$DSO_PIC_CFLAGS"; then
    ac_configure_args="$ac_configure_args --with-pic"
  fi
  if test "$CROSS_COMPILE"; then
    case "$target" in
    *-android*|*-linuxandroid*)
      CFLAGS="$ANDROID_CFLAGS"
      CPPFLAGS="$ANDROID_CPPFLAGS"
      LDFLAGS="$ANDROID_LDFLAGS"

      export AS CC CXX CPP LD AR RANLIB STRIP CPPFLAGS CFLAGS LDFLAGS

      ac_configure_args="$ac_configure_args --build=$build --host=$target HOST_CC=\"$HOST_CC\""
      ;;
    *)
      ac_configure_args="$ac_configure_args --build=$build --host=$target HOST_CC=\"$HOST_CC\" CC=\"$CC\""
      ;;
    esac
  fi
  if test "$_MSC_VER"; then
    # Use a wrapper script for cl and ml that looks more like gcc.
    # autotools can't quite handle an MSVC build environment yet.
    ac_configure_args="$ac_configure_args LD=link CPP=\"cl -nologo -EP\" SHELL=sh.exe"
    case "${target_cpu}" in
    x86_64)
      # Need target since MSYS tools into mozilla-build may be 32bit
      ac_configure_args="$ac_configure_args CC=\"$_topsrcdir/ctypes/libffi/msvcc.sh -m64\" --build=$build --host=$target"
      ;;
    *)
      ac_configure_args="$ac_configure_args CC=$_topsrcdir/ctypes/libffi/msvcc.sh"
      ;;
    esac
  fi
  if test "$SOLARIS_SUNPRO_CC"; then
    # Always use gcc for libffi on Solaris
    if test ! "$HAVE_64BIT_OS"; then
      ac_configure_args="$ac_configure_args CC=gcc CFLAGS=-m32 LD= LDFLAGS="
    else
      ac_configure_args="$ac_configure_args CC=gcc CFLAGS=-m64 LD= LDFLAGS="
    fi
  fi
  if test "$AIX_IBM_XLC"; then
    # Always use gcc for libffi on IBM AIX5/AIX6
    if test ! "$HAVE_64BIT_OS"; then
      ac_configure_args="$ac_configure_args CC=gcc CFLAGS=-maix32"
    else
      ac_configure_args="$ac_configure_args CC=gcc CFLAGS=-maix64"
    fi
  fi
  if test "$OS_ARCH" = "OS2"; then
    ac_configure_args="$ac_configure_args CFLAGS=-Zomf AR=emxomfar"
  fi

  # Use a separate cache file for libffi, since it does things differently
  # from our configure.
  mkdir -p $_objdir/ctypes/libffi
  old_cache_file=$cache_file
  cache_file=$_objdir/ctypes/libffi/config.cache
  old_config_files=$CONFIG_FILES
  unset CONFIG_FILES
  AC_OUTPUT_SUBDIRS(ctypes/libffi)
  cache_file=$old_cache_file
  ac_configure_args="$_SUBDIR_CONFIG_ARGS"
  CONFIG_FILES=$old_config_files
fi