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(config/config.mk)
AC_CONFIG_AUX_DIR(${srcdir}/build/autoconf)
AC_CANONICAL_SYSTEM
TARGET_CPU="${target_cpu}"
TARGET_VENDOR="${target_vendor}"
TARGET_OS="${target_os}"

MOZ_DEB_TIMESTAMP=`date +"%a, %d  %b %Y %T %z"   2>&1` 
AC_SUBST(MOZ_DEB_TIMESTAMP)

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 ========================================================
MOZJPEG=62
MOZPNG=10401
MOZZLIB=0x1230
NSPR_VERSION=4
NSS_VERSION=3

dnl Set the minimum version of toolkit libs used by mozilla
dnl ========================================================
GLIB_VERSION=1.2.0
LIBIDL_VERSION=0.6.3
PERL_VERSION=5.006
PYTHON_VERSION=2.5
CAIRO_VERSION=1.10
PANGO_VERSION=1.14.0
GTK2_VERSION=2.10.0
WINDRES_VERSION=2.14.90
W32API_VERSION=3.14
GNOMEVFS_VERSION=2.0
GNOMEUI_VERSION=2.2.0
GCONF_VERSION=1.2.1
GIO_VERSION=2.18
STARTUP_NOTIFICATION_VERSION=0.8
DBUS_VERSION=0.60
SQLITE_VERSION=3.7.5
LIBNOTIFY_VERSION=0.4

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 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)

MOZ_ARG_WITH_STRING(l10n-base,
[  --with-l10n-base=DIR    path to l10n repositories],
    L10NBASEDIR=$withval)
if test -n "$L10NBASEDIR"; then
    if test "$L10NBASEDIR" = "yes" -o "$L10NBASEDIR" = "no"; then
        AC_MSG_ERROR([--with-l10n-base must specify a path])
    elif test -d "$L10NBASEDIR"; then
        L10NBASEDIR=`cd "$L10NBASEDIR" && pwd`
    else
        AC_MSG_ERROR([Invalid value --with-l10n-base, $L10NBASEDIR doesn't exist])
    fi
fi
AC_SUBST(L10NBASEDIR)

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

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
    OBJCOPY="$android_toolchain"/bin/"$android_tool_prefix"-objcopy

    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}"
    if test -z "$ANDROID_PACKAGE_NAME" ; then
        ANDROID_PACKAGE_NAME='org.mozilla.$(MOZ_APP_NAME)'
    fi

    AC_DEFINE(ANDROID)
    AC_DEFINE_UNQUOTED(ANDROID_VERSION, $android_version)
    AC_SUBST(ANDROID_VERSION)
    CROSS_COMPILE=1
    MOZ_CHROME_FILE_FORMAT=omni
    ZLIB_DIR=yes
    ;;
*-linux*)
    AC_PATH_PROG(OBJCOPY,objcopy)
    ;;
esac

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

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

if test -n "$CROSS_COMPILE" -a "$target" != "$host"; then
    echo "cross compiling from $host to $target"
    cross_compiling=yes

    _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

    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)
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 ========================================================
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

if test -n "$COMPILE_ENVIRONMENT"; then
if test "$MOZ_WINSDK_TARGETVER" -lt "06000000"; then
    # We can't build parental controls either
    MOZ_DISABLE_PARENTAL_CONTROLS=1
fi
fi

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

        # Make sure compilers are valid
        CFLAGS="$CFLAGS -TC -nologo"
        CXXFLAGS="$CXXFLAGS -TP -nologo"
        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=''
        AC_DEFINE(HAVE_SEH_EXCEPTIONS)

        if test -n "$WIN32_REDIST_DIR"; then
          if test ! -d "$WIN32_REDIST_DIR"; then
            AC_MSG_ERROR([Invalid Win32 Redist directory: ${WIN32_REDIST_DIR}])
          fi
          WIN32_REDIST_DIR=`cd "$WIN32_REDIST_DIR" && pwd`
        fi

        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

        # Check midl version
        _MIDL_FULL_VERSION=`"${MIDL}" -v 2>&1 | sed -nre "$_MSVC_VER_FILTER"`
        _MIDL_MAJOR_VERSION=`echo ${_MIDL_FULL_VERSION} | $AWK -F\. '{ print $1 }'`
        _MIDL_MINOR_VERSION=`echo ${_MIDL_FULL_VERSION} | $AWK -F\. '{ print $2 }'`
        _MIDL_REV_VERSION=`echo ${_MIDL_FULL_VERSION} | $AWK -F\. '{ print $3 }'`
        # Add flags if necessary
        AC_MSG_CHECKING([for midl flags])
        case "$target" in
        i*86-*)
            if test \( "$_MIDL_MAJOR_VERSION" = "7" -a "$_MIDL_MINOR_VERSION" = "00" -a "$_MIDL_REV_VERSION" = "0499" \); then
                # MIDL version 7.00.0499 defaults /env win64 on x64 platforms.
                # MIDL version 7.00.0500 or later has no problem.
                MIDL_FLAGS="${MIDL_FLAGS} -env win32"
                AC_MSG_RESULT([need -env win32])
            else
                AC_MSG_RESULT([none needed])
            fi
            ;;
        x86_64-*)
            MIDL_FLAGS="${MIDL_FLAGS} -env x64"
            ;;
        *)
            AC_MSG_RESULT([none needed])
            ;;
        esac

        # Identify which version of the SDK we're building with
        # Windows Server 2008 and newer SDKs have WinSDKVer.h, get the version
        # from there
        MOZ_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
            MOZ_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

dnl Test breaks icc on OS/2 && MSVC
if test "$CC" != "icc" -a -z "$_WIN32_MSVC"; then
    AC_PROG_CC_C_O
    if grep "NO_MINUS_C_MINUS_O 1" ./confdefs.h >/dev/null; then
        USING_HCC=1
        _OLDCC=$CC
        _OLDCXX=$CXX
        CC="${srcdir}/build/hcc '$CC'"
        CXX="${srcdir}/build/hcpp '$CXX'"
    fi
fi

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.
    AC_DEFINE(HAVE_IO_H)
    AC_DEFINE(HAVE_SETBUF)
    AC_DEFINE(HAVE_ISATTY)
fi

fi # COMPILE_ENVIRONMENT

AC_SUBST(MIDL_FLAGS)
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(CLANG_CC)
AC_SUBST(CLANG_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_PROGS(UNZIP, unzip)
if test -z "$UNZIP" -o "$UNZIP" = ":"; then
    AC_MSG_ERROR([unzip not found in \$PATH])
fi
MOZ_PATH_PROGS(ZIP, zip)
if test -z "$ZIP" -o "$ZIP" = ":"; then
    AC_MSG_ERROR([zip not found in \$PATH])
fi
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

MOZ_PATH_PROG(RPMBUILD, rpmbuild, :)
AC_SUBST(RPMBUILD)

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])

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

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 MOZ_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>],[],
   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

dnl clang prior to 2.9 (including Xcode 4) does not support all the
dnl constructs required by the libtheora inline asm. This is used to
dnl detect and disable it
AC_LANG_SAVE
AC_LANG_C
AC_TRY_COMPILE([
#if defined(__clang__)
# if __clang_major__<2 || (__clang_major__==2 && __clang_minor__<9)
#  error "clang older than 2.9 detected"
# endif
#endif
               ],
               [],
               result="yes",
               result="no")
if test "$result" = "no"; then
    AC_DEFINE(HAVE_OLD_CLANG)
    HAVE_OLD_CLANG=1
fi
AC_LANG_RESTORE
AC_SUBST(HAVE_OLD_CLANG)

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_JPEG_CFLAGS=
MOZ_JPEG_LIBS='$(call EXPAND_LIBNAME_PATH,mozjpeg,$(DEPTH)/jpeg)'
MOZ_ZLIB_CFLAGS=
MOZ_ZLIB_LIBS='$(call EXPAND_LIBNAME_PATH,mozz,$(DEPTH)/modules/zlib/src)'
MOZ_BZ2_CFLAGS=
MOZ_BZ2_LIBS='$(call EXPAND_LIBNAME_PATH,bz2,$(DEPTH)/modules/libbz2/src)'
MOZ_PNG_CFLAGS=
MOZ_PNG_LIBS='$(call EXPAND_LIBNAME_PATH,mozpng,$(DEPTH)/modules/libimg/png)'

MOZ_JS_STATIC_LIBS='$(call EXPAND_LIBNAME_PATH,js_static,$(LIBXUL_DIST)/lib)'
MOZ_JS_SHARED_LIBS='$(call EXPAND_LIBNAME_PATH,mozjs,$(LIBXUL_DIST)/lib)'
DYNAMIC_XPCOM_LIBS='-L$(LIBXUL_DIST)/bin -lxpcom -lxpcom_core -lmozalloc'
MOZ_FIX_LINK_PATHS='-Wl,-rpath-link,$(LIBXUL_DIST)/bin -Wl,-rpath-link,$(prefix)/lib'
XPCOM_FROZEN_LDOPTS='-L$(LIBXUL_DIST)/bin -lxpcom -lmozalloc'
LIBXUL_LIBS='$(XPCOM_FROZEN_LDOPTS) -lxul'
XPCOM_GLUE_LDOPTS='$(LIBXUL_DIST)/lib/$(LIB_PREFIX)xpcomglue_s.$(LIB_SUFFIX) $(XPCOM_FROZEN_LDOPTS)'
XPCOM_STANDALONE_GLUE_LDOPTS='$(LIBXUL_DIST)/lib/$(LIB_PREFIX)xpcomglue.$(LIB_SUFFIX)'

MOZ_FS_LAYOUT=unix

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
    ;;
IRIX64)
    HOST_OS_ARCH=IRIX
    ;;
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=${target_cpu}
    ;;
BSD_386)
    OS_ARCH=BSD
    ;;
dgux)
    OS_ARCH=DGUX
    ;;
IRIX64)
    OS_ARCH=IRIX
    ;;
UNIX_SV)
    if "`cat /etc/bcheckrc | grep -c NCR 2>/dev/null`" != "0"; then
        OS_ARCH=NCR
    else
        OS_ARCH=UNIXWARE
        OS_RELEASE=`uname -v`
    fi
    ;;
ncr)
    OS_ARCH=NCR
    ;;
UNIX_SYSTEM_V)
    OS_ARCH=NEC
    ;;
OSF1)
    case `uname -v` in
    148)
        OS_RELEASE=V3.2C
        ;;
    564)
        OS_RELEASE=V4.0B
        ;;
    878)
        OS_RELEASE=V4.0D
        ;;
    esac
    ;;
OS_2)
    OS_ARCH=OS2
    OS_TARGET=OS2
    OS_RELEASE=`uname -v`
    ;;
SCO_SV)
    OS_ARCH=SCOOS
    OS_RELEASE=5.0
    ;;
SINIX-N | SINIX-Y | SINIX-Z |ReliantUNIX-M)
    OS_ARCH=SINIX
    OS_TEST=`uname -p`
    ;;
UnixWare)
    OS_ARCH=UNIXWARE
    OS_RELEASE=`uname -v`
    ;;
Darwin)
    case "${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 "$GNU_CC"; then
    # FIXME: Let us build with strict aliasing. bug 414641.
    CFLAGS="$CFLAGS -fno-strict-aliasing"
    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
    # -Wdeclaration-after-statement - MSVC doesn't like these
    # 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="${_WARNINGS_CFLAGS} -Wall -W -Wno-unused -Wpointer-arith -Wdeclaration-after-statement"
    if test -z "$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 $(DEPTH)/mozilla-config.h -DMOZILLA_CLIENT'
    _USE_CPP_INCLUDE_FLAG=1
elif test "$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_MOZILLA_CONFIG_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_MOZILLA_CONFIG_H_ -DMOZILLA_CLIENT'
fi

if test "$GNU_CXX"; then
    # FIXME: Let us build with strict aliasing. bug 414641.
    CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
    # 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)/mozilla-config.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_MOZILLA_CONFIG_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 = 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
    MOZ_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 Profiling
dnl ========================================================
if test -n "$MOZ_PROFILING"; then
    AC_DEFINE(MOZ_PROFILING)
fi

dnl ========================================================
dnl System overrides of the defaults for host
dnl ========================================================
case "$host" in
*mingw*)
    if test -n "$_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 2.5 or newer of Python to build.
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])

dnl Get mozilla version from central milestone file
MOZILLA_VERSION=`$PERL $srcdir/config/milestone.pl -topsrcdir $srcdir`

dnl Get version of various core apps from the version files.
FIREFOX_VERSION=`cat $_topsrcdir/browser/config/version.txt`

if test -z "$FIREFOX_VERSION"; then
    AC_MSG_ERROR([FIREFOX_VERSION is unexpectedly blank.])
fi

AC_DEFINE_UNQUOTED(MOZILLA_VERSION,"$MOZILLA_VERSION")
AC_DEFINE_UNQUOTED(MOZILLA_VERSION_U,$MOZILLA_VERSION)

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
        MOZ_CHECK_HEADERS(sys/inttypes.h)
    fi
    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_OPTIMIZE_FLAGS="-O3 -fomit-frame-pointer"
    else
        MOZ_OPTIMIZE_FLAGS="-O3 -fno-omit-frame-pointer"
    fi
    _PEDANTIC=
    CFLAGS="$CFLAGS -fno-common"
    CXXFLAGS="$CXXFLAGS -fno-common"
    DLL_SUFFIX=".dylib"
    DSO_LDOPTS=''
    STRIP="$STRIP -x -S"
    _PLATFORM_DEFAULT_TOOLKIT='cairo-cocoa'
    TARGET_NSPR_MDCPUCFG='\"md/_darwin.cfg\"'
    # The ExceptionHandling framework is needed for Objective-C exception
    # logging code in nsObjCExceptions.h. Currently we only use that in debug
    # builds.
    MOZ_DEBUG_LDFLAGS="$MOZ_DEBUG_LDFLAGS -framework ExceptionHandling"

    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)
    ;;

*-irix5*)
    AC_DEFINE(IRIX)
    DSO_LDOPTS='-elf -shared'

    if test "$GNU_CC"; then
       MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
       MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
       MKSHLIB_FORCE_ALL='-Wl,-all'
       MKSHLIB_UNFORCE_ALL='-Wl,-none'
       CXXFLAGS="$CXXFLAGS -D_LANGUAGE_C_PLUS_PLUS"
    else
       MKSHLIB='$(LD) $(DSO_LDOPTS) -o $@'
       MKCSHLIB='$(LD) $(DSO_LDOPTS) -o $@'
       MKSHLIB_FORCE_ALL='-all'
       MKSHLIB_UNFORCE_ALL='-none'
    fi
    ;;

*-irix6*)
    AC_DEFINE(IRIX)
    dnl the irix specific xptcinvoke code is written against the n32 ABI so we *must* 
    dnl compile and link using -n32
    USE_N32=1
    TARGET_COMPILER_ABI=n32
    DSO_LDOPTS='-elf -shared'
    MKSHLIB='$(CCC) $(CXXFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
    MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_CFLAGS) $(DSO_LDOPTS) -o $@'
    _MOZ_EXCEPTIONS_FLAGS_OFF="-LANG:exceptions=OFF"
    _MOZ_EXCEPTIONS_FLAGS_ON="-LANG:exceptions=ON"
    if test "$GNU_CC"; then
       MKSHLIB_FORCE_ALL='-Wl,-all'
       MKSHLIB_UNFORCE_ALL='-Wl,-none'
       _WARNINGS_CFLAGS="-Wall"
       _WARNINGS_CXXFLAGS="-Wall"
       CXXFLAGS="$CXXFLAGS -D_LANGUAGE_C_PLUS_PLUS"
    else
       MKSHLIB_FORCE_ALL='-all'
       MKSHLIB_UNFORCE_ALL='-none'
	   AR_LIST="$AR t"
	   AR_EXTRACT="$AR x"
	   AR_DELETE="$AR d"
	   AR='$(CXX) -ar'
	   AR_FLAGS='-o $@'
       CFLAGS="$CFLAGS -woff 3262 -G 4"
       CXXFLAGS="$CXXFLAGS -woff 3262 -G 4"
       if test -n "$USE_N32"; then
	   ASFLAGS="$ASFLAGS -n32"
	   CFLAGS="$CFLAGS -n32"
	   CXXFLAGS="$CXXFLAGS -n32"
	   LDFLAGS="$LDFLAGS -n32"
       fi
       AC_DEFINE(NSCAP_DISABLE_DEBUG_PTR_TYPES)
       AC_MSG_WARN([Clearing MOZ_FIX_LINK_PATHS for OSF/1 as fix for bug 333545 (till the reference bug 332075 is fixed.])
       MOZ_FIX_LINK_PATHS=
    fi
    if test -z "$GNU_CXX"; then
      MIPSPRO_CXX=1
    fi
    ;;

*-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_OPTIMIZE_FLAGS="-Os -freorder-blocks -fno-reorder-functions -fomit-frame-pointer"
    else
        MOZ_OPTIMIZE_FLAGS="-Os -freorder-blocks -fno-reorder-functions -fno-omit-frame-pointer"
    fi
    ;;

*-*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="-Os -freorder-blocks $MOZ_OPTIMIZE_SIZE_TWEAK $MOZ_FRAMEPTR_FLAGS"
        MOZ_DEBUG_FLAGS="-g"
    fi

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

    MOZ_MEMORY=1

    case "${target_cpu}" in
    alpha*)
    	CFLAGS="$CFLAGS -mieee"
    	CXXFLAGS="$CXXFLAGS -mieee"
    ;;
    i*86)
    	USE_ELF_DYNSTR_GC=1
    ;;
    mips*)
        MOZ_DEBUG_FLAGS="-g" # We want inlining
    ;;
    esac

    if test -z "$MC"; then 
        MC=mc.exe  
    fi
    ;;
*-mingw*)
    DSO_CFLAGS=
    DSO_PIC_CFLAGS=
    DLL_SUFFIX=.dll
    RC=rc.exe
    MC=mc.exe
    # certain versions of cygwin's makedepend barf on the 
    # #include <string> vs -I./dist/include/string issue so don't use it
    SYSTEM_MAKEDEPEND=
    if test -n "$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="$LIBS -luuid -lgdi32 -lwinmm -lwsock32"
        MOZ_FIX_LINK_PATHS=
        DYNAMIC_XPCOM_LIBS='-L$(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
        ZIP=zip
        UNZIP=unzip
        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)/dist/include/mozilla-config.h -DMOZILLA_CLIENT'
        _DEFINES_CXXFLAGS='-FI $(DEPTH)/dist/include/mozilla-config.h -DMOZILLA_CLIENT'
        CFLAGS="$CFLAGS -W3 -Gy -Fd\$(COMPILE_PDBFILE)"
        CXXFLAGS="$CXXFLAGS -W3 -Gy -Fd\$(COMPILE_PDBFILE)"
        CXXFLAGS="$CXXFLAGS -wd4800" # disable warning "forcing value to bool"
        # 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_OPTIMIZE_FLAGS='-O1'
        else
            MOZ_OPTIMIZE_FLAGS='-O1 -Oy-'
        fi
        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="$LDFLAGS -DYNAMICBASE"
        fi
    fi
    MOZ_JPEG_LIBS='$(call EXPAND_LIBNAME_PATH,jpeg32$(VERSION_NUMBER),$(DEPTH)/jpeg)'
    MOZ_PNG_LIBS='$(call EXPAND_LIBNAME_PATH,png,$(DEPTH)/modules/libimg/png)'
    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.])
        ;;
    *)
        AC_CHECK_HEADERS(oleacc.idl)
        AC_LANG_SAVE
        AC_LANG_CPLUSPLUS
        MOZ_CHECK_HEADERS(atlbase.h)
        AC_LANG_RESTORE
        ;;
    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

        MOZ_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*)
    if test "$SO_VERSION"; then
        DLL_SUFFIX=".so.$SO_VERSION"
    else
        DLL_SUFFIX=".so.1.0"
    fi
    MOZ_FIX_LINK_PATHS='-Wl,-rpath-link,$(LIBXUL_DIST)/bin -Wl,-rpath-link,$(prefix)/lib -Wl,-rpath-link,$(if $(X11BASE),$(X11BASE),/usr/X11R6)/lib'
    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 $(LIBXUL_DIST)/lib/mozalloc.lib'
    TARGET_MD_ARCH=os2
    _PLATFORM_DEFAULT_TOOLKIT="cairo-os2"
    RC=rc.exe
    MC=mc.exe
    RCFLAGS='-n'
    MOZ_USER_DIR="Mozilla"
    ZIP="$ZIP -X"

    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\"'
    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 and
dnl = to export jemalloc symbols when linking a program
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'
        MOZ_JEMALLOC_STANDALONE_GLUE_LDOPTS='-rdynamic -Wl,--version-script -Wl,$(BUILD_TOOLS)/gnu-ld-scripts/jemalloc-standalone-linkage-version-script'
        ;;
    *-solaris*)
        if test -z "$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

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 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

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 Check whether we can use gcc's c++0x mode
AC_LANG_CPLUSPLUS

if test "$GNU_CXX"; then
    _SAVE_CXXFLAGS=$CXXFLAGS
    CXXFLAGS="$CXXFLAGS -std=gnu++0x"

    if test -z "$_MOZ_USE_RTTI"; then
        CXXFLAGS="$CXXFLAGS $_MOZ_RTTI_FLAGS"
        AC_CACHE_CHECK(for gcc c++0x headers bug without rtti,
            ac_cv_cxx0x_headers_bug,
            [AC_TRY_COMPILE([#include <memory>], [],
                            ac_cv_cxx0x_headers_bug="no",
                            ac_cv_cxx0x_headers_bug="yes")])
        CXXFLAGS="$_SAVE_CXXFLAGS"
        if test "$ac_cv_cxx0x_headers_bug" = "no"; then
            CXXFLAGS="$CXXFLAGS -std=gnu++0x"
        fi
    fi
fi

dnl Check for usable char16_t (2 bytes, unsigned)
dnl (we might not need the unsignedness check anymore)
AC_CACHE_CHECK(for usable char16_t (2 bytes, unsigned),
    ac_cv_have_usable_char16_t,
    [AC_TRY_COMPILE([$configure_static_assert_macros],
                    [CONFIGURE_STATIC_ASSERT(sizeof(char16_t) == 2);
                     CONFIGURE_STATIC_ASSERT(char16_t(-1) > char16_t(0));
                     CONFIGURE_STATIC_ASSERT(sizeof((u"hello")[0]) == 2);
                     CONFIGURE_STATIC_ASSERT(sizeof(u'a') == 2);
                     CONFIGURE_STATIC_ASSERT(u'\xFFFF' > u'\x0')],
                    ac_cv_have_usable_char16_t="yes",
                    ac_cv_have_usable_char16_t="no")])
if test "$ac_cv_have_usable_char16_t" = "yes"; then
    AC_DEFINE(HAVE_CPP_CHAR16_T)
    HAVE_CPP_CHAR16_T=1
elif test "$GNU_CXX"; then
    CXXFLAGS="$_SAVE_CXXFLAGS"
fi

dnl Check for usable wchar_t (2 bytes, unsigned)
dnl (we really don't need the unsignedness check anymore)
dnl ========================================================

AC_CACHE_CHECK(for usable wchar_t (2 bytes, unsigned),
    ac_cv_have_usable_wchar_v2,
    [AC_TRY_COMPILE([#include <stddef.h>
                     $configure_static_assert_macros],
                    [CONFIGURE_STATIC_ASSERT(sizeof(wchar_t) == 2);
                     CONFIGURE_STATIC_ASSERT((wchar_t)-1 > (wchar_t) 0)],
                    ac_cv_have_usable_wchar_v2="yes",
                    ac_cv_have_usable_wchar_v2="no")])
if test "$ac_cv_have_usable_wchar_v2" = "yes"; then
    AC_DEFINE(HAVE_CPP_2BYTE_WCHAR_T)
    HAVE_CPP_2BYTE_WCHAR_T=1
elif test "$ac_cv_have_usable_char16_t" != "yes"; then
dnl This is really gcc-only
dnl Do this test using CXX only since some versions of gcc
dnl 2.95-2.97 have a signed wchar_t in c++ only and some versions
dnl only have short-wchar support for c++.
dnl Note that we assume that mac & win32 have short wchar (see nscore.h)

    _SAVE_CXXFLAGS=$CXXFLAGS
    CXXFLAGS="$CXXFLAGS -fshort-wchar"

    AC_CACHE_CHECK(for compiler -fshort-wchar option, 
        ac_cv_have_usable_wchar_option_v2,
        [AC_TRY_LINK([#include <stddef.h>
                      $configure_static_assert_macros],
                     [CONFIGURE_STATIC_ASSERT(sizeof(wchar_t) == 2);
                      CONFIGURE_STATIC_ASSERT((wchar_t)-1 > (wchar_t) 0)],
                     ac_cv_have_usable_wchar_option_v2="yes",
                     ac_cv_have_usable_wchar_option_v2="no")])

    if test "$ac_cv_have_usable_wchar_option_v2" = "yes"; then
        AC_DEFINE(HAVE_CPP_2BYTE_WCHAR_T)
        HAVE_CPP_2BYTE_WCHAR_T=1
        if test "$OS_TARGET" = Android; then
            WCHAR_CFLAGS="-fshort-wchar -Wl,--no-wchar-size-warning"
            CXXFLAGS="$CXXFLAGS -Wl,--no-wchar-size-warning"
            CFLAGS="$CFLAGS -Wl,--no-wchar-size-warning"
            DSO_LDOPTS="$DSO_LDOPTS -Wl,--no-wchar-size-warning"
        else
            WCHAR_CFLAGS="-fshort-wchar"
        fi
    else    
        CXXFLAGS=$_SAVE_CXXFLAGS
    fi
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 -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)

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 "$target_os" in
freebsd*|openbsd*)
# for stuff like -lXshm
    CPPFLAGS="${CPPFLAGS} ${X_CFLAGS}"
    ;;
esac
MOZ_CHECK_HEADERS(sys/byteorder.h compat.h getopt.h)
MOZ_CHECK_HEADERS(sys/bitypes.h memory.h unistd.h)
MOZ_CHECK_HEADERS(gnu/libc-version.h nl_types.h)
MOZ_CHECK_HEADERS(malloc.h)
MOZ_CHECK_HEADERS(X11/XKBlib.h)
MOZ_CHECK_HEADERS(io.h)

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

dnl Quota support
MOZ_CHECK_HEADERS(sys/quota.h)
MOZ_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)
MOZ_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
MOZ_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$enable_dtrace" = "xyes"; then
  MOZ_CHECK_HEADER(sys/sdt.h, HAVE_DTRACE=1)
  if test -n "$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*)
	;;
*)
	MOZ_CHECK_HEADERS(sys/cdefs.h)
	;;
esac

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, 
        MOZ_CHECK_HEADER(dlfcn.h, 
        AC_DEFINE(HAVE_DLOPEN)))
    ;;
esac

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

XLDFLAGS="$X_LIBS"
XLIBS="$X_EXTRA_LIBS"

dnl ========================================================
dnl Checks for X libraries.
dnl Ordering is important.
dnl Xt is dependent upon SM as of X11R6
dnl ========================================================
if test "$no_x" = "yes"; then
    AC_DEFINE(NO_X11)
else
    AC_DEFINE_UNQUOTED(FUNCPROTO,15)
	XLIBS="-lX11 $XLIBS"
	_SAVE_LDFLAGS="$LDFLAGS"
	LDFLAGS="$XLDFLAGS $LDFLAGS"
	AC_CHECK_LIB(X11, XDrawLines, [X11_LIBS="-lX11"],
		[MISSING_X="$MISSING_X -lX11"], $XLIBS)
	AC_CHECK_LIB(Xext, XextAddDisplay, [XEXT_LIBS="-lXext"],
		[MISSING_X="$MISSING_X -lXext"], $XLIBS)
     
	AC_CHECK_LIB(Xt, XtFree, [ XT_LIBS="-lXt"], [
        unset ac_cv_lib_Xt_XtFree
	    AC_CHECK_LIB(ICE, IceFlush, [XT_LIBS="-lICE $XT_LIBS"],, $XT_LIBS $XLIBS)
	    AC_CHECK_LIB(SM, SmcCloseConnection, [XT_LIBS="-lSM $XT_LIBS"],, $XT_LIBS $XLIBS) 
        AC_CHECK_LIB(Xt, XtFree, [ XT_LIBS="-lXt $XT_LIBS"],
		    [MISSING_X="$MISSING_X -lXt"], $X_PRE_LIBS $XT_LIBS $XLIBS)
        ])

    # AIX needs the motif library linked before libXt to prevent
    # crashes in plugins linked against Motif - Bug #98892
    case "${target_os}" in
    aix*)
        XT_LIBS="-lXm $XT_LIBS"
        ;;
    esac

    dnl ========================================================
    dnl = Check for XShm
    dnl ========================================================
    AC_CHECK_LIB(Xext, XShmCreateImage, _HAVE_XSHM_XEXT=1,,
        $XLIBS $XEXT_LIBS)

    dnl ========================================================
    dnl = Check for Xss
    dnl ========================================================
    MOZ_CHECK_HEADER(X11/extensions/scrnsaver.h,
        AC_CHECK_LIB(Xss, XScreenSaverQueryInfo,
            [XSS_LIBS="-lXss $XEXT_LIBS $XLIBS"
             AC_DEFINE(HAVE_LIBXSS)],, $XEXT_LIBS $XLIBS))

	LDFLAGS="$_SAVE_LDFLAGS"

    dnl ========================================================
    dnl = Check for freetype2 and its functionality
    dnl ========================================================
    AC_CHECK_FT2(6.1.0, [_HAVE_FREETYPE2=1], [_HAVE_FREETYPE2=])

    if test "$_HAVE_FREETYPE2"; then
    	_SAVE_LIBS="$LIBS"
    	_SAVE_CFLAGS="$CFLAGS"
    	LIBS="$LIBS $FT2_LIBS"
    	CFLAGS="$CFLAGS $FT2_CFLAGS"

        AC_CACHE_CHECK(for FT_Bitmap_Size.y_ppem,
            ac_cv_member_FT_Bitmap_Size_y_ppem,
            [AC_TRY_COMPILE([#include <ft2build.h>
                             #include FT_FREETYPE_H],
                            [FT_Bitmap_Size s;
                             if (sizeof s.y_ppem) return 0;
                             return 1],
                            ac_cv_member_FT_Bitmap_Size_y_ppem=yes,
                            ac_cv_member_FT_Bitmap_Size_y_ppem=no)])
        if test "$ac_cv_member_FT_Bitmap_Size_y_ppem" = yes; then
            HAVE_FT_BITMAP_SIZE_Y_PPEM=1
        else
            HAVE_FT_BITMAP_SIZE_Y_PPEM=0
        fi
        AC_DEFINE_UNQUOTED(HAVE_FT_BITMAP_SIZE_Y_PPEM,
                           $HAVE_FT_BITMAP_SIZE_Y_PPEM,
                           [FT_Bitmap_Size structure includes y_ppem field])

        AC_CHECK_FUNCS(FT_GlyphSlot_Embolden FT_Load_Sfnt_Table FT_Select_Size)

    	LIBS="$_SAVE_LIBS"
    	CFLAGS="$_SAVE_CFLAGS"
    fi

fi # $no_x

AC_SUBST(XCFLAGS)
AC_SUBST(XLDFLAGS)
AC_SUBST(XLIBS)
AC_SUBST(XEXT_LIBS)
AC_SUBST(XT_LIBS)
AC_SUBST(XSS_LIBS)

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 ========================================================
dnl See if mmap sees writes
dnl For cross compiling, just define it as no, which is a safe default
dnl ========================================================
AC_MSG_CHECKING(whether mmap() sees write()s)

changequote(,)
mmap_test_prog='
    #include <stdlib.h>
    #include <unistd.h>
    #include <sys/mman.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>

    char fname[] = "conftest.file";
    char zbuff[1024]; /* Fractional page is probably worst case */

    int main() {
	char *map;
	int fd;
	int i;
	unlink(fname);
	fd = open(fname, O_RDWR | O_CREAT, 0660);
	if(fd<0) return 1;
	unlink(fname);
	write(fd, zbuff, sizeof(zbuff));
	lseek(fd, 0, SEEK_SET);
	map = (char*)mmap(0, sizeof(zbuff), PROT_READ, MAP_SHARED, fd, 0);
	if(map==(char*)-1) return 2;
	for(i=0; fname[i]; i++) {
	    int rc = write(fd, &fname[i], 1);
	    if(map[i]!=fname[i]) return 4;
	}
	return 0;
    }
'
changequote([,])

AC_TRY_RUN($mmap_test_prog , result="yes", result="no", result="yes")

AC_MSG_RESULT("$result")

if test "$result" = "no"; then
    AC_DEFINE(MMAP_MISSES_WRITES)
fi


dnl Checks for library functions.
dnl ========================================================
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_CHECK_FUNCS(random strerror lchown fchmod snprintf statvfs memmove rint stat64 lstat64 truncate64 statvfs64 setbuf isatty)
AC_CHECK_FUNCS(flockfile getpagesize)
AC_CHECK_FUNCS(localtime_r strtok_r)

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 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

AM_LANGINFO_CODESET

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)


AC_CACHE_CHECK(for C++ \"explicit\" keyword,
               ac_cv_cpp_explicit,
               [AC_TRY_COMPILE(class X {
                               public: explicit X(int i) : i_(i) {}
                               private: int i_;
                               };,
                               X x(3);,
                               ac_cv_cpp_explicit=yes,
                               ac_cv_cpp_explicit=no)])
if test "$ac_cv_cpp_explicit" = yes ; then
   AC_DEFINE(HAVE_CPP_EXPLICIT)
fi

AC_CACHE_CHECK(for C++ \"typename\" keyword,
               ac_cv_cpp_typename,
               [AC_TRY_COMPILE(class param {
                               public:
                                   typedef unsigned long num_type;
                               };

                               template <class T> class tplt {
                               public:
                                   typedef typename T::num_type t_num_type;
                                   t_num_type foo(typename T::num_type num) {
                                       return num;
                                   }
                               };,
                               tplt<param> A;
                               A.foo(0);,
                               ac_cv_cpp_typename=yes,
                               ac_cv_cpp_typename=no)])
if test "$ac_cv_cpp_typename" = yes ; then
   AC_DEFINE(HAVE_CPP_TYPENAME)
fi

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 Some compilers have limited support for operators with templates;
dnl specifically, it is necessary to define derived operators when a base
dnl class's operator declaration should suffice.
AC_CACHE_CHECK(whether operators must be re-defined for templates derived from templates,
               ac_cv_need_derived_template_operators,
               [AC_TRY_COMPILE([template <class T> class Base { };
                                template <class T>
                                Base<T> operator+(const Base<T>& lhs, const Base<T>& rhs) { return lhs; }
                                template <class T> class Derived : public Base<T> { };],
                               [Derived<char> a, b;
                                Base<char> c = a + b;
                                return 0;],
                               ac_cv_need_derived_template_operators=no,
                               ac_cv_need_derived_template_operators=yes)])
if test "$ac_cv_need_derived_template_operators" = yes ; then
  AC_DEFINE(NEED_CPP_DERIVED_TEMPLATE_OPERATORS)
fi


dnl Some compilers have trouble detecting that a template class
dnl that derives from another template is actually an instance
dnl of the base class. This test checks for that.
AC_CACHE_CHECK(whether we need to cast a derived template to pass as its base class,
               ac_cv_need_cpp_template_cast_to_base,
               [AC_TRY_COMPILE([template <class T> class Base { };
                                template <class T> class Derived : public Base<T> { };
                                template <class T> int foo(const Base<T>&) { return 0; }],
                               [Derived<char> bar; return foo(bar);],
                               ac_cv_need_cpp_template_cast_to_base=no,
                               ac_cv_need_cpp_template_cast_to_base=yes)])
if test "$ac_cv_need_cpp_template_cast_to_base" = yes ; then
  AC_DEFINE(NEED_CPP_TEMPLATE_CAST_TO_BASE)
fi

dnl Some compilers have trouble resolving the ambiguity between two
dnl functions whose arguments differ only by cv-qualifications.
AC_CACHE_CHECK(whether the compiler can resolve const ambiguities for templates,
               ac_cv_can_resolve_const_ambiguity,
               [AC_TRY_COMPILE([
                                template <class T> class ptrClass {
                                  public: T* ptr;
                                };

                                template <class T> T* a(ptrClass<T> *arg) {
                                  return arg->ptr;
                                }

                                template <class T>
                                const T* a(const ptrClass<T> *arg) {
                                  return arg->ptr;
                                }
                               ],
                               [ ptrClass<int> i;
                                 a(&i); ],
                               ac_cv_can_resolve_const_ambiguity=yes,
                               ac_cv_can_resolve_const_ambiguity=no)])
if test "$ac_cv_can_resolve_const_ambiguity" = no ; then
  AC_DEFINE(CANT_RESOLVE_CPP_CONST_AMBIGUITY)
fi

dnl
dnl We don't do exceptions on unix.  The only reason this used to be here
dnl is that mozilla/xpcom/tests/TestCOMPtr.cpp has a test which uses 
dnl exceptions.  But, we turn exceptions off by default and this test breaks.
dnl So im commenting this out until someone writes some artificial 
dnl intelligence to detect not only if the compiler has exceptions, but if 
dnl they are enabled as well.
dnl 
dnl AC_CACHE_CHECK(for C++ \"exceptions\",
dnl                ac_cv_cpp_exceptions,
dnl                [AC_TRY_COMPILE(class X { public: X() {} };
dnl                                static void F() { throw X(); },
dnl                                try { F(); } catch(X & e) { },
dnl                                ac_cv_cpp_exceptions=yes,
dnl                                ac_cv_cpp_exceptions=no)])
dnl if test $ac_cv_cpp_exceptions = yes ; then
dnl    AC_DEFINE(HAVE_CPP_EXCEPTIONS)
dnl fi

dnl Some compilers have marginal |using| support; for example, gcc-2.7.2.3
dnl supports it well enough to allow us to use it to change access, but not
dnl to resolve ambiguity. The next two tests determine how well the |using|
dnl keyword is supported.
dnl
dnl Check to see if we can change access with |using|.  Test both a
dnl legal and an illegal example.
AC_CACHE_CHECK(whether the C++ \"using\" keyword can change access,
               ac_cv_cpp_access_changing_using2,
               [AC_TRY_COMPILE(
                   class A { protected: int foo() { return 0; } };
                   class B : public A { public: using A::foo; };,
                   B b; return b.foo();,
                   [AC_TRY_COMPILE(
                       class A { public: int foo() { return 1; } };
                       class B : public A { private: using A::foo; };,
                       B b; return b.foo();,
                       ac_cv_cpp_access_changing_using2=no,
                       ac_cv_cpp_access_changing_using2=yes)],
                   ac_cv_cpp_access_changing_using2=no)])
if test "$ac_cv_cpp_access_changing_using2" = yes ; then
   AC_DEFINE(HAVE_CPP_ACCESS_CHANGING_USING)
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 Check to see if the |std| namespace is supported. If so, we'll want
dnl to qualify any standard library calls with "std::" to ensure that
dnl those functions can be resolved.
AC_CACHE_CHECK(for \"std::\" namespace,
               ac_cv_cpp_namespace_std,
               [AC_TRY_COMPILE([#include <algorithm>],
                               [return std::min(0, 1);],
                               ac_cv_cpp_namespace_std=yes,
                               ac_cv_cpp_namespace_std=no)])
if test "$ac_cv_cpp_namespace_std" = yes ; then
   AC_DEFINE(HAVE_CPP_NAMESPACE_STD)
fi

dnl Older compilers are overly ambitious with respect to using the standard
dnl template library's |operator!=()| when |operator==()| is defined. In
dnl which case, defining |operator!=()| in addition to |operator==()| causes
dnl ambiguity at compile-time. This test checks for that case.
AC_CACHE_CHECK(whether standard template operator!=() is ambiguous,
               ac_cv_cpp_unambiguous_std_notequal,
               [AC_TRY_COMPILE([#include <algorithm>
                                struct T1 {};
                                int operator==(const T1&, const T1&) { return 0; }
                                int operator!=(const T1&, const T1&) { return 0; }],
                               [T1 a,b; return a != b;],
                               ac_cv_cpp_unambiguous_std_notequal=unambiguous,
                               ac_cv_cpp_unambiguous_std_notequal=ambiguous)])
if test "$ac_cv_cpp_unambiguous_std_notequal" = unambiguous ; then
  AC_DEFINE(HAVE_CPP_UNAMBIGUOUS_STD_NOTEQUAL)
fi


AC_CACHE_CHECK(for C++ reinterpret_cast,
               ac_cv_cpp_reinterpret_cast,
               [AC_TRY_COMPILE(struct X { int i; };
                               struct Y { int i; };,
                               X x; X*const z = &x;Y*y = reinterpret_cast<Y*>(z);,
                               ac_cv_cpp_reinterpret_cast=yes,
                               ac_cv_cpp_reinterpret_cast=no)])
if test "$ac_cv_cpp_reinterpret_cast" = yes ; then
   AC_DEFINE(HAVE_CPP_NEW_CASTS)
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=
MOZ_CHECK_HEADER(malloc.h,        [MALLOC_H=malloc.h])
if test "$MALLOC_H" = ""; then
  MOZ_CHECK_HEADER(malloc/malloc.h, [MALLOC_H=malloc/malloc.h])
  if test "$MALLOC_H" = ""; then
    MOZ_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)

MOZ_ARG_WITH_STRING(libxul-sdk,
[  --with-libxul-sdk=PFX   Use the libXUL SDK at <PFX>],
  LIBXUL_SDK_DIR=$withval)

if test "$LIBXUL_SDK_DIR" = "yes"; then
    AC_MSG_ERROR([--with-libxul-sdk must specify a path])
elif test -n "$LIBXUL_SDK_DIR" -a "$LIBXUL_SDK_DIR" != "no"; then
    LIBXUL_SDK=`cd "$LIBXUL_SDK_DIR" && pwd`

    if test ! -f "$LIBXUL_SDK/include/xpcom-config.h"; then
        AC_MSG_ERROR([$LIBXUL_SDK/include/xpcom-config.h doesn't exist])
    fi

fi
AC_SUBST(LIBXUL_SDK)

if test -n "$LIBXUL_SDK"; then
    LIBXUL_DIST="$LIBXUL_SDK"
else
    LIBXUL_DIST="$MOZ_BUILD_ROOT/dist"
fi
AC_SUBST(LIBXUL_DIST)

SYSTEM_LIBXUL=

MOZ_ARG_WITH_BOOL(system-libxul,
[  --with-system-libxul    Use system installed libxul SDK],
    SYSTEM_LIBXUL=1)

dnl ========================================================
dnl = If NSPR was not detected in the system, 
dnl = use the one in the source tree (mozilla/nsprpub)
dnl ========================================================
MOZ_ARG_WITH_BOOL(system-nspr,
[  --with-system-nspr      Use system installed NSPR],
    _USE_SYSTEM_NSPR=1 )

if test -n "$_USE_SYSTEM_NSPR"; then
    AM_PATH_NSPR(4.8.8, [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 $NSPR_CFLAGS"
    AC_TRY_COMPILE([#include "prtypes.h"],
                [#ifndef PR_STATIC_ASSERT
                 #error PR_STATIC_ASSERT not defined or requires including prlog.h
                 #endif],
                [MOZ_NATIVE_NSPR=1],
                AC_MSG_ERROR([system NSPR does not support PR_STATIC_ASSERT or including prtypes.h does not provide it]))
    CFLAGS=$_SAVE_CFLAGS
else
    if test "$OS_ARCH" = "WINNT"; then
        NSPR_CFLAGS="-I${LIBXUL_DIST}/include/nspr"
        if test -n "$GNU_CC"; then
            NSPR_LIBS="-L${LIBXUL_DIST}/lib -lnspr${NSPR_VERSION} -lplc${NSPR_VERSION} -lplds${NSPR_VERSION}"
        else
            NSPR_LIBS="${LIBXUL_DIST}/lib/nspr${NSPR_VERSION}.lib ${LIBXUL_DIST}/lib/plc${NSPR_VERSION}.lib ${LIBXUL_DIST}/lib/plds${NSPR_VERSION}.lib "
        fi
    else
        NSPR_CFLAGS='`$(LIBXUL_DIST)/sdk/bin/nspr-config --prefix='${LIBXUL_DIST}' --includedir='${LIBXUL_DIST}'/include/nspr --cflags`'
        NSPR_LIBS='`$(LIBXUL_DIST)/sdk/bin/nspr-config --prefix='${LIBXUL_DIST}' --libdir='${LIBXUL_DIST}'/lib --libs`'
    fi
fi

dnl system libevent Support
dnl ========================================================
MOZ_ARG_WITH_STRING(system-libevent,
[  --with-system-libevent=[PFX]
                          Use system libevent [installed at prefix PFX]],
    LIBEVENT_DIR=$withval)

_SAVE_CFLAGS=$CFLAGS
_SAVE_LDFLAGS=$LDFLAGS
_SAVE_LIBS=$LIBS
if test -z "$LIBEVENT_DIR" -o "$LIBEVENT_DIR" = no; then
    MOZ_NATIVE_LIBEVENT=
else
    if test "${LIBEVENT_DIR}" = "yes"; then
        LIBEVENT_DIR=/usr
    fi
    CFLAGS="-I${LIBEVENT_DIR}/include $CFLAGS"
    LDFLAGS="-L${LIBEVENT_DIR}/lib $LDFLAGS"
    MOZ_CHECK_HEADER(event.h,
        [if test ! -f "${LIBEVENT_DIR}/include/event.h"; then
             AC_MSG_ERROR([event.h found, but is not in ${LIBEVENT_DIR}/include])
         fi],
        AC_MSG_ERROR([--with-system-libevent requested but event.h not found]))
    AC_CHECK_LIB(event, event_init,
                 [MOZ_NATIVE_LIBEVENT=1
                  MOZ_LIBEVENT_INCLUDES="${LIBEVENT_DIR}/include"
                  MOZ_LIBEVENT_LIBS="-L${LIBEVENT_DIR}/lib -levent"],
                 [MOZ_NATIVE_LIBEVENT= MOZ_LIBEVENT_INCLUDES= MOZ_LIBEVENT_LIBS=])
fi
CFLAGS=$_SAVE_CFLAGS
LDFLAGS=$_SAVE_LDFLAGS
LIBS=$_SAVE_LIBS

AC_SUBST(MOZ_NATIVE_LIBEVENT)
AC_SUBST(MOZ_LIBEVENT_INCLUDES)
AC_SUBST(MOZ_LIBEVENT_LIBS)

dnl ========================================================
dnl = If NSS was not detected in the system, 
dnl = use the one in the source tree (mozilla/security/nss)
dnl ========================================================

MOZ_ARG_WITH_BOOL(system-nss,
[  --with-system-nss       Use system installed NSS],
    _USE_SYSTEM_NSS=1 )

if test -n "$_USE_SYSTEM_NSS"; then
    AM_PATH_NSS(3.12.10, [MOZ_NATIVE_NSS=1], [AC_MSG_ERROR([you don't have NSS installed or your version is too old])])
fi

if test -n "$MOZ_NATIVE_NSS"; then
   NSS_LIBS="$NSS_LIBS -lcrmf"
else
   NSS_CFLAGS='-I$(LIBXUL_DIST)/include/nss'
   NSS_DEP_LIBS="\
        \$(LIBXUL_DIST)/lib/\$(LIB_PREFIX)crmf.\$(LIB_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(DLL_PREFIX)smime$NSS_VERSION\$(DLL_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(DLL_PREFIX)ssl$NSS_VERSION\$(DLL_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(DLL_PREFIX)nss$NSS_VERSION\$(DLL_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(DLL_PREFIX)nssutil$NSS_VERSION\$(DLL_SUFFIX)"

   if test -z "$GNU_CC" -a "$OS_ARCH" = "WINNT" -o "$OS_ARCH" = "OS2"; then
       NSS_LIBS="\
        \$(LIBXUL_DIST)/lib/\$(LIB_PREFIX)crmf.\$(LIB_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(LIB_PREFIX)smime$NSS_VERSION.\$(LIB_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(LIB_PREFIX)ssl$NSS_VERSION.\$(LIB_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(LIB_PREFIX)nss$NSS_VERSION.\$(LIB_SUFFIX) \
        \$(LIBXUL_DIST)/lib/\$(LIB_PREFIX)nssutil$NSS_VERSION.\$(LIB_SUFFIX)"
   else
       NSS_LIBS='$(LIBS_DIR)'" -lcrmf -lsmime$NSS_VERSION -lssl$NSS_VERSION -lnss$NSS_VERSION -lnssutil$NSS_VERSION"
   fi
fi

dnl ======================
dnl Detect yasm
dnl ======================

AC_MSG_CHECKING([for YASM assembler])
AC_CHECK_PROGS(YASM, yasm, "")

if test -n "$YASM"; then
  dnl Pull out yasm's version string
  changequote(,)
  _YASM_VER_FILTER='s|.* \([0-9]\{1,\}\.[0-9]\{1,\}\.[0-9]\{1,\}\.[0-9]\{1,\}\).*|\1|p'
  changequote([,])

  YASM_VERSION=`yasm --version | sed -ne "$_YASM_VER_FILTER"`
  _YASM_MAJOR_VERSION=`echo ${YASM_VERSION} | $AWK -F\. '{ print $1 }'`
  _YASM_MINOR_VERSION=`echo ${YASM_VERSION} | $AWK -F\. '{ print $2 }'`
  _YASM_RELEASE=`      echo ${YASM_VERSION} | $AWK -F\. '{ print $3 }'`
  _YASM_BUILD=`        echo ${YASM_VERSION} | $AWK -F\. '{ print $4 }'`
fi

if test -z "$SKIP_LIBRARY_CHECKS"; then
dnl system JPEG support
dnl ========================================================
MOZ_ARG_WITH_STRING(system-jpeg,
[  --with-system-jpeg[=PFX]
                          Use system libjpeg [installed at prefix PFX]],
    JPEG_DIR=$withval)

_SAVE_CFLAGS=$CFLAGS
_SAVE_LDFLAGS=$LDFLAGS
_SAVE_LIBS=$LIBS
if test -n "${JPEG_DIR}" -a "${JPEG_DIR}" != "yes"; then
    CFLAGS="-I${JPEG_DIR}/include $CFLAGS"
    LDFLAGS="-L${JPEG_DIR}/lib $LDFLAGS"
fi
if test -z "$JPEG_DIR" -o "$JPEG_DIR" = no; then
    SYSTEM_JPEG=
else
    AC_CHECK_LIB(jpeg, jpeg_destroy_compress, [SYSTEM_JPEG=1 JPEG_LIBS="-ljpeg $JPEG_LIBS"], SYSTEM_JPEG=, $JPEG_LIBS)
fi

if test "$SYSTEM_JPEG" = 1; then
    LIBS="$JPEG_LIBS $LIBS"
    AC_TRY_COMPILE([ #include <stdio.h>
                     #include <sys/types.h>
                     #include <jpeglib.h> ],
                   [ #if JPEG_LIB_VERSION < $MOZJPEG
                     #error "Insufficient JPEG library version ($MOZJPEG required)."
                     #endif ],
                   SYSTEM_JPEG=1,
                   [SYSTEM_JPEG= JPEG_CFLAGS= JPEG_LIBS=]) 
fi
CFLAGS=$_SAVE_CFLAGS
LDFLAGS=$_SAVE_LDFLAGS
LIBS=$_SAVE_LIBS

if test -n "${JPEG_DIR}" -a -d "${JPEG_DIR}" -a "$SYSTEM_JPEG" = 1; then
    JPEG_CFLAGS="-I${JPEG_DIR}/include"
    JPEG_LIBS="-L${JPEG_DIR}/lib ${JPEG_LIBS}"
fi

dnl system ZLIB support
dnl ========================================================
MOZ_ARG_WITH_STRING(system-zlib,
[  --with-system-zlib[=PFX]
                          Use system libz [installed at prefix PFX]],
    ZLIB_DIR=$withval)

_SAVE_CFLAGS=$CFLAGS
_SAVE_LDFLAGS=$LDFLAGS
_SAVE_LIBS=$LIBS
if test -n "${ZLIB_DIR}" -a "${ZLIB_DIR}" != "yes"; then
    CFLAGS="-I${ZLIB_DIR}/include $CFLAGS"
    LDFLAGS="-L${ZLIB_DIR}/lib $LDFLAGS"
fi
if test -z "$ZLIB_DIR" -o "$ZLIB_DIR" = no; then
    SYSTEM_ZLIB=
else
    AC_CHECK_LIB(z, gzread, [SYSTEM_ZLIB=1 ZLIB_LIBS="-lz $ZLIB_LIBS"], 
	[SYSTEM_ZLIB= ZLIB_CFLAGS= ZLIB_LIBS=], $ZLIB_LIBS)
fi
if test "$SYSTEM_ZLIB" = 1; then
    LIBS="$ZLIB_LIBS $LIBS"
    AC_TRY_COMPILE([ #include <stdio.h>
                     #include <string.h>
                     #include <zlib.h> ],
                   [ #if ZLIB_VERNUM < $MOZZLIB 
                     #error "Insufficient zlib version ($MOZZLIB required)."
                     #endif ],
                   SYSTEM_ZLIB=1,
                   [SYSTEM_ZLIB= ZLIB_CFLAGS= ZLIB_LIBS=]) 
fi
CFLAGS=$_SAVE_CFLAGS
LDFLAGS=$_SAVE_LDFLAGS
LIBS=$_SAVE_LIBS

if test "${ZLIB_DIR}" -a -d "${ZLIB_DIR}" -a "$SYSTEM_ZLIB" = 1; then
    ZLIB_CFLAGS="-I${ZLIB_DIR}/include"
    ZLIB_LIBS="-L${ZLIB_DIR}/lib ${ZLIB_LIBS}"
fi

dnl system BZIP2 Support
dnl ========================================================
MOZ_ARG_WITH_STRING(system-bz2,
[  --with-system-bz2[=PFX]
                          Use system libbz2 [installed at prefix PFX]],
    BZ2_DIR=$withval)

_SAVE_CFLAGS=$CFLAGS
_SAVE_LDFLAGS=$LDFLAGS
_SAVE_LIBS=$LIBS
if test -n "${BZ2_DIR}" -a "${BZ2_DIR}" != "yes"; then
    CFLAGS="-I${BZ2_DIR}/include $CFLAGS"
    LDFLAGS="-L${BZ2_DIR}/lib $LDFLAGS"
fi
if test -z "$BZ2_DIR" -o "$BZ2_DIR" = no; then
    SYSTEM_BZ2=
else
    AC_CHECK_LIB(bz2, BZ2_bzread, [SYSTEM_BZ2=1 BZ2_LIBS="-lbz2"],
	[SYSTEM_BZ2= BZ2_CFLAGS= BZ2_LIBS=])
fi
CFLAGS=$_SAVE_CFLAGS
LDFLAGS=$_SAVE_LDFLAGS
LIBS=$_SAVE_LIBS

if test "${BZ2_DIR}" -a -d "${BZ2_DIR}" -a "$SYSTEM_BZ2" = 1; then
    BZ2_CFLAGS="-I${BZ2_DIR}/include"
    BZ2_LIBS="-L${BZ2_DIR}/lib ${BZ2_LIBS}"
fi

dnl system PNG Support
dnl ========================================================
MOZ_ARG_WITH_STRING(system-png, 
[  --with-system-png[=PFX]
                          Use system libpng [installed at prefix PFX]],
    PNG_DIR=$withval)

_SAVE_CFLAGS=$CFLAGS
_SAVE_LDFLAGS=$LDFLAGS
_SAVE_LIBS=$LIBS
CFLAGS="$ZLIB_CFLAGS $CFLAGS"
LDFLAGS="$ZLIB_LIBS -lz $LDFLAGS"
if test -n "${PNG_DIR}" -a "${PNG_DIR}" != "yes"; then
    CFLAGS="-I${PNG_DIR}/include $CFLAGS"
    LDFLAGS="-L${PNG_DIR}/lib $LDFLAGS"
fi
if test -z "$PNG_DIR" -o "$PNG_DIR" = no; then
    SYSTEM_PNG=
else
    _SAVE_PNG_LIBS=$PNG_LIBS
    AC_CHECK_LIB(png, png_get_valid, [SYSTEM_PNG=1 PNG_LIBS="-lpng $PNG_LIBS"],
                 AC_MSG_ERROR([--with-system-png requested but no working libpng found]), 
                 $PNG_LIBS)
    AC_CHECK_LIB(png, png_get_acTL, ,
                 AC_MSG_ERROR([--with-system-png won't work because the system's libpng doesn't have APNG support]),
                 $_SAVE_PNG_LIBS)
fi
if test "$SYSTEM_PNG" = 1; then
    LIBS="$PNG_LIBS $LIBS"
    AC_TRY_COMPILE([ #include <stdio.h>
                     #include <sys/types.h>
                     #include <png.h> ],
                   [ #if PNG_LIBPNG_VER < $MOZPNG
                     #error "Insufficient libpng version ($MOZPNG required)."
                     #endif
                     #ifndef PNG_UINT_31_MAX
                     #error "Insufficient libpng version."
                     #endif ],
                   SYSTEM_PNG=1,
                   AC_MSG_ERROR([--with-system-png requested but no working libpng found]))
fi
CFLAGS=$_SAVE_CFLAGS
LDFLAGS=$_SAVE_LDFLAGS
LIBS=$_SAVE_LIBS

if test "${PNG_DIR}" -a -d "${PNG_DIR}" -a "$SYSTEM_PNG" = 1; then
    PNG_CFLAGS="-I${PNG_DIR}/include"
    PNG_LIBS="-L${PNG_DIR}/lib ${PNG_LIBS}"
fi

fi # SKIP_LIBRARY_CHECKS

dnl system HunSpell Support
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(system-hunspell,
[  --enable-system-hunspell
                          Use system hunspell (located with pkgconfig)],
    SYSTEM_HUNSPELL=1 )

if test -n "$SYSTEM_HUNSPELL"; then
    PKG_CHECK_MODULES(MOZ_HUNSPELL, hunspell)
fi

AC_SUBST(SYSTEM_HUNSPELL)

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
    MOZ_JS_STATIC_LIBS="$MOZ_JS_STATIC_LIBS $MOZ_FFI_LIBS"
fi

dnl ========================================================
dnl Java SDK support
dnl ========================================================

JAVA_BIN_PATH=
MOZ_ARG_WITH_STRING(java-bin-path,
[  --with-java-bin-path=dir
                          Location of Java binaries (java, javac, jar)],
    JAVA_BIN_PATH=$withval)

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

MOZ_ARG_HEADER(Application)

ENABLE_TESTS=1
MOZ_BRANDING_DIRECTORY=
MOZ_OFFICIAL_BRANDING=
MOZ_FEEDS=1
MOZ_INSTALLER=1
MOZ_JSDEBUGGER=1
MOZ_AUTH_EXTENSION=1
MOZ_OGG=1
MOZ_RAW=
MOZ_SYDNEYAUDIO=
MOZ_VORBIS=
MOZ_TREMOR=
MOZ_WAVE=1
MOZ_MEDIA=
MOZ_WEBM=1
VPX_AS=
VPX_ASFLAGS=
VPX_AS_DASH_C_FLAG=
VPX_AS_CONVERSION=
VPX_ASM_SUFFIX=
VPX_X86_ASM=
VPX_ARM_ASM=
LIBJPEG_TURBO_AS=
LIBJPEG_TURBO_ASFLAGS=
LIBJPEG_TURBO_X86_ASM=
LIBJPEG_TURBO_X64_ASM=
MOZ_PANGO=1
MOZ_PERMISSIONS=1
MOZ_PLACES=1
MOZ_PREF_EXTENSIONS=1
MOZ_PROFILELOCKING=1
MOZ_PSM=1
MOZ_RDF=1
MOZ_REFLOW_PERF=
MOZ_SAFE_BROWSING=
MOZ_HELP_VIEWER=
MOZ_SPELLCHECK=1
MOZ_SVG_DLISTS=
MOZ_TOOLKIT_SEARCH=1
MOZ_UI_LOCALE=en-US
MOZ_UNIVERSALCHARDET=1
MOZ_URL_CLASSIFIER=
MOZ_XSLT_STANDALONE=
MOZ_XTF=1
MOZ_XUL=1
MOZ_ZIPWRITER=1
NS_PRINTING=1
MOZ_PDF_PRINTING=
MOZ_DISABLE_DOMCRYPTO=
NSS_DISABLE_DBM=
NECKO_WIFI=1
NECKO_COOKIES=1
NECKO_DISK_CACHE=1
NECKO_PROTOCOLS_DEFAULT="about data file ftp http res viewsource websocket wyciwyg"
USE_ARM_KUSER=
BUILD_CTYPES=1
MOZ_USE_NATIVE_POPUP_WINDOWS=


case "${target}" in
*android*|*darwin*)
    ACCESSIBILITY=
    ;;
*)
    ACCESSIBILITY=1
    ;;
esac

case "$target_os" in
    mingw*)
        NS_ENABLE_TSF=1
        if test -z "$GNU_CC"; then 
            if test "$MOZ_WINSDK_TARGETVER" -lt "06000000"; then
                NS_ENABLE_TSF=
            fi
        fi
        if test -n "$NS_ENABLE_TSF"; then
            AC_DEFINE(NS_ENABLE_TSF)
        fi
        ;;
esac

case "${target}" in
    *-android*|*-linuxandroid*)
        NSS_DISABLE_DBM=1
        USE_ARM_KUSER=1
        MOZ_INSTALLER=
        NECKO_WIFI=
        MOZ_THEME_FASTSTRIPE=1
        MOZ_TREE_FREETYPE=1
        MOZ_MEMORY=1
        ;;
esac

MOZ_ARG_ENABLE_STRING(application,
[  --enable-application=APP
                          Options include:
                            browser (Firefox)
                            xulrunner
                            content/xslt (Standalone Transformiix XSLT)
                            netwerk (Standalone Necko)
                            tools/update-packaging (AUS-related packaging tools)
                            standalone (use this for standalone
                              xpcom/xpconnect or to manually drive a build)],
[ MOZ_BUILD_APP=$enableval ] )

MOZ_ARG_WITH_STRING(xulrunner-stub-name,
[  --with-xulrunner-stub-name=appname   Create the xulrunner stub with the given name],
  XULRUNNER_STUB_NAME=$withval)

if test -z "$XULRUNNER_STUB_NAME"; then
  case "$target_os" in
  darwin*)
    XULRUNNER_STUB_NAME=xulrunner
    ;;
  *)
    XULRUNNER_STUB_NAME=xulrunner-stub
  esac
fi
AC_SUBST(XULRUNNER_STUB_NAME)

AC_MSG_CHECKING([for application to build])
if test -z "$MOZ_BUILD_APP"; then
  AC_MSG_RESULT([browser])
  MOZ_BUILD_APP=browser
else
  # We have a valid application only if it has a build.mk file in its top
  # directory.
  if test ! -f "${srcdir}/${MOZ_BUILD_APP}/build.mk" ; then
    AC_MSG_RESULT([none])
    AC_MSG_ERROR([--enable-application value not recognized (${MOZ_BUILD_APP}/build.mk does not exist).])
  else
    AC_MSG_RESULT([$MOZ_BUILD_APP])
  fi
fi

# Allow the application to influence configure with a confvars.sh script.

AC_MSG_CHECKING([if app-specific confvars.sh exists])
if test -f "${srcdir}/${MOZ_BUILD_APP}/confvars.sh" ; then
  AC_MSG_RESULT([${srcdir}/${MOZ_BUILD_APP}/confvars.sh])
  . "${srcdir}/${MOZ_BUILD_APP}/confvars.sh"
else
  AC_MSG_RESULT([no])
fi

# Allow someone to change MOZ_APP_NAME in mozconfig
MOZ_ARG_WITH_STRING(app-name,
[--with-app-name=APPNAME sets MOZ_APP_NAME to APPNAME],
WITH_APP_NAME=$withval,
)

if test -n "$WITH_APP_NAME" ; then
    MOZ_APP_NAME="$WITH_APP_NAME"
fi

# Now is a good time to test for logic errors, define mismatches, etc.
case "$MOZ_BUILD_APP" in
xulrunner)
  if test "$LIBXUL_SDK"; then
    AC_MSG_ERROR([Building XULRunner --with-libxul-sdk doesn't make sense; XULRunner provides the libxul SDK.])
  fi
  ;;
esac

# Special cases where we need to AC_DEFINE something. Also a holdover for apps
# that haven't made a confvars.sh yet. Don't add new stuff here, use
# MOZ_BUILD_APP.
case "$MOZ_BUILD_APP" in
browser)
  AC_DEFINE(MOZ_PHOENIX)
  ;;

xulrunner)
  AC_DEFINE(MOZ_XULRUNNER)
  ;;

content/xslt)
  AC_DEFINE(TX_EXE)
  ;;

standalone) 
  MOZ_APP_NAME=mozilla
  MOZ_APP_DISPLAYNAME=Mozilla
  MOZ_APP_VERSION=$MOZILLA_VERSION
  ;;

esac

AC_SUBST(MOZ_BUILD_APP)
AC_SUBST(MOZ_PHOENIX)
AC_SUBST(MOZ_XULRUNNER)

AC_DEFINE_UNQUOTED(MOZ_BUILD_APP,$MOZ_BUILD_APP)

dnl ========================================================
dnl = 
dnl = Toolkit Options
dnl = 
dnl ========================================================
MOZ_ARG_HEADER(Toolkit Options)

    dnl ========================================================
    dnl = Select the default toolkit
    dnl ========================================================
	MOZ_ARG_ENABLE_STRING(default-toolkit,
	[  --enable-default-toolkit=TK
                          Select default toolkit
                          Platform specific defaults:
                            Mac OS X - cairo-cocoa
                            OS/2 - cairo-os2
                            Win32 - cairo-windows
                            Gtk2 with DirectFB - cairo-gtk2-dfb
                            * - cairo-gtk2
                            * - cairo-qt],
    [ _DEFAULT_TOOLKIT=$enableval ],
    [ _DEFAULT_TOOLKIT=$_PLATFORM_DEFAULT_TOOLKIT])

    if test "$_DEFAULT_TOOLKIT" = "cairo-windows" \
        -o "$_DEFAULT_TOOLKIT" = "cairo-gtk2" \
        -o "$_DEFAULT_TOOLKIT" = "cairo-gtk2-dfb" \
        -o "$_DEFAULT_TOOLKIT" = "cairo-gtk2-x11" \
        -o "$_DEFAULT_TOOLKIT" = "cairo-qt" \
        -o "$_DEFAULT_TOOLKIT" = "cairo-os2" \
        -o "$_DEFAULT_TOOLKIT" = "cairo-cocoa" \
        -o "$_DEFAULT_TOOLKIT" = "cairo-android"
    then
        dnl nglayout only supports building with one toolkit,
        dnl so ignore everything after the first comma (",").
        MOZ_WIDGET_TOOLKIT=`echo "$_DEFAULT_TOOLKIT" | sed -e "s/,.*$//"`
    else
        AC_MSG_ERROR([You must specify a default toolkit (perhaps $_PLATFORM_DEFAULT_TOOLKIT).])
    fi

dnl ========================================================
dnl = Enable the toolkit as needed                         =
dnl ========================================================

case "$MOZ_WIDGET_TOOLKIT" in

cairo-windows)
    MOZ_WIDGET_TOOLKIT=windows
    MOZ_WEBGL=1
    MOZ_PDF_PRINTING=1
    MOZ_INSTRUMENT_EVENT_LOOP=1
    ;;

cairo-gtk2|cairo-gtk2-x11)
    MOZ_WIDGET_TOOLKIT=gtk2
    MOZ_ENABLE_GTK2=1
    MOZ_ENABLE_XREMOTE=1
    MOZ_WEBGL=1
    MOZ_WEBGL_GLX=1

    AC_DEFINE(MOZ_X11)
    MOZ_X11=1
    USE_FC_FREETYPE=1

    TK_CFLAGS='$(MOZ_GTK2_CFLAGS)'
    TK_LIBS='$(MOZ_GTK2_LIBS)'
    AC_DEFINE(MOZ_WIDGET_GTK2)
    MOZ_PDF_PRINTING=1
    MOZ_INSTRUMENT_EVENT_LOOP=1
    ;;

cairo-gtk2-dfb)
    MOZ_WIDGET_TOOLKIT=gtk2
    MOZ_ENABLE_GTK2=1
    MOZ_WEBGL=

    AC_DEFINE(MOZ_DFB)
    MOZ_DFB=1

    TK_CFLAGS='$(MOZ_GTK2_CFLAGS)'
    TK_LIBS='$(MOZ_GTK2_LIBS)'
    AC_DEFINE(MOZ_WIDGET_GTK2)
    if test "$no_x" != "yes"; then
        AC_MSG_WARN([Disabling X when DirectFB is specified.])
        no_x=yes
    fi
    MOZ_PDF_PRINTING=1
    ;;

cairo-qt)
    MOZ_WIDGET_TOOLKIT=qt
    MOZ_ENABLE_QT=1
    MOZ_ENABLE_XREMOTE=1
    MOZ_WEBGL=1
    MOZ_WEBGL_GLX=1
    USE_ELF_DYNSTR_GC=

    AC_DEFINE(MOZ_X11)
    MOZ_X11=1
    USE_FC_FREETYPE=1
    XT_LIBS=

    TK_CFLAGS='$(MOZ_QT_CFLAGS)'
    TK_LIBS='$(MOZ_QT_LIBS)'
    AC_DEFINE(MOZ_WIDGET_QT)
    MOZ_PDF_PRINTING=1
    ;;

cairo-os2)
    MOZ_WIDGET_TOOLKIT=os2
    USE_FC_FREETYPE=1
    TK_CFLAGS='$(MOZ_CAIRO_CFLAGS)'
    TK_LIBS='$(MOZ_CAIRO_LIBS)'
    MOZ_PDF_PRINTING=1
    ;;

cairo-cocoa)
    MOZ_WIDGET_TOOLKIT=cocoa
    AC_DEFINE(MOZ_WIDGET_COCOA)
    MOZ_USER_DIR="Mozilla"
    AC_DEFINE(XP_MACOSX)
    TK_LIBS='-framework QuartzCore -framework Carbon -framework CoreAudio -framework AudioToolbox -framework AudioUnit -framework AddressBook -framework OpenGL'
    TK_CFLAGS="-DNO_X11"
    LDFLAGS="$LDFLAGS -framework Cocoa -lobjc"
    CFLAGS="$CFLAGS $TK_CFLAGS"
    CXXFLAGS="$CXXFLAGS $TK_CFLAGS"
    LIBXUL_LIBS='$(XPCOM_FROZEN_LDOPTS) $(LIBXUL_DIST)/bin/XUL'
    MOZ_FS_LAYOUT=bundle
    MOZ_WEBGL=1
    MOZ_INSTRUMENT_EVENT_LOOP=1
    ;;

cairo-android)
    AC_DEFINE(MOZ_WIDGET_ANDROID)
    MOZ_WIDGET_TOOLKIT=android
    TK_CFLAGS='$(MOZ_CAIRO_CFLAGS)'
    TK_LIBS='$(MOZ_CAIRO_LIBS)'
    MOZ_WEBGL=1
    MOZ_PDF_PRINTING=1
    ;;

esac

AC_SUBST(MOZ_PDF_PRINTING)
if test "$MOZ_PDF_PRINTING"; then
   PDF_SURFACE_FEATURE="#define CAIRO_HAS_PDF_SURFACE 1"
   AC_DEFINE(MOZ_PDF_PRINTING)
fi

if test "$MOZ_ENABLE_XREMOTE"; then
    AC_DEFINE(MOZ_ENABLE_XREMOTE)
fi

if test "$MOZ_INSTRUMENT_EVENT_LOOP"; then
   AC_DEFINE(MOZ_INSTRUMENT_EVENT_LOOP)
fi

if test "$COMPILE_ENVIRONMENT"; then
  if test "$MOZ_ENABLE_GTK2"; then
    if test "$MOZ_X11"; then
      GDK_PACKAGES=gdk-x11-2.0
    elif test "$MOZ_DFB"; then
      PKG_CHECK_MODULES(MOZ_DFB, directfb >= 1.1.0)
      GDK_PACKAGES=directfb
    fi

    PKG_CHECK_MODULES(MOZ_GTK2, gtk+-2.0 >= $GTK2_VERSION gtk+-unix-print-2.0 glib-2.0 gobject-2.0 $GDK_PACKAGES)
  fi

fi # COMPILE_ENVIRONMENT

AC_SUBST(MOZ_FS_LAYOUT)

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 = startup-notification support module
dnl ========================================================

if test "$MOZ_ENABLE_GTK2"
then
    MOZ_ENABLE_STARTUP_NOTIFICATION=

    MOZ_ARG_ENABLE_BOOL(startup-notification,
    [  --enable-startup-notification
                          Enable startup-notification support (default: disabled) ],
        MOZ_ENABLE_STARTUP_NOTIFICATION=force,
        MOZ_ENABLE_STARTUP_NOTIFICATION=)
    if test "$MOZ_ENABLE_STARTUP_NOTIFICATION"
    then
        PKG_CHECK_MODULES(MOZ_STARTUP_NOTIFICATION,
                          libstartup-notification-1.0 >= $STARTUP_NOTIFICATION_VERSION,
        [MOZ_ENABLE_STARTUP_NOTIFICATION=1], [
            if test "$MOZ_ENABLE_STARTUP_NOTIFICATION" = "force"
            then
                AC_MSG_ERROR([* * * Could not find startup-notification >= $STARTUP_NOTIFICATION_VERSION])
            fi
            MOZ_ENABLE_STARTUP_NOTIFICATION=
        ])
    fi

    if test "$MOZ_ENABLE_STARTUP_NOTIFICATION"; then
        AC_DEFINE(MOZ_ENABLE_STARTUP_NOTIFICATION)
    fi

    TK_LIBS="$TK_LIBS $MOZ_STARTUP_NOTIFICATION_LIBS"
fi
AC_SUBST(MOZ_ENABLE_STARTUP_NOTIFICATION)
AC_SUBST(MOZ_STARTUP_NOTIFICATION_CFLAGS)
AC_SUBST(MOZ_STARTUP_NOTIFICATION_LIBS)

dnl ========================================================
dnl = QT support
dnl ========================================================
if test "$MOZ_ENABLE_QT"
then
    MOZ_ARG_WITH_STRING(qtdir,
    [  --with-qtdir=\$dir       Specify Qt directory ],
    [ QTDIR=$withval])

    if test -z "$QTDIR"; then
        PKG_CHECK_MODULES(MOZ_QT, QtGui QtNetwork QtCore QtOpenGL)
        AC_CHECK_PROGS(HOST_MOC, $MOC moc, "")
    else
        MOZ_QT_LIBS="-L$QTDIR/lib/ -lQtGui -lQtNetwork -lQtCore -lQtDBus -lQtXml -lQtOpenGL"

        MOZ_QT_CFLAGS="-DQT_SHARED"
        MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I$QTDIR/include"
        MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I$QTDIR/include/Qt"
        MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I$QTDIR/include/QtGui"
        MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I$QTDIR/include/QtCore"
        MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I$QTDIR/include/QtNetwork"
        MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I$QTDIR/include/QtDBus"
        MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I$QTDIR/include/QtXml"
        HOST_MOC="$QTDIR/bin/moc"
    fi
    if test -z "$HOST_MOC"; then
        AC_MSG_ERROR([No acceptable moc preprocessor found. Qt SDK is not installed or --with-qt is
incorrect])
    fi
    MOC=$HOST_MOC

    MOZ_ENABLE_QMSYSTEM2=
    PKG_CHECK_MODULES(_QMSYSTEM2, qmsystem2,
                      MOZ_ENABLE_QMSYSTEM2=1,
                      MOZ_ENABLE_QMSYSTEM2=)

    if test "$MOZ_ENABLE_QMSYSTEM2"; then
      MOZ_ENABLE_QMSYSTEM2=1
      MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS $_QMSYSTEM2_CFLAGS"
      MOZ_QT_LIBS="$MOZ_QT_LIBS $_QMSYSTEM2_LIBS"
      AC_DEFINE(MOZ_ENABLE_QMSYSTEM2)
    fi

    MOZ_ENABLE_QTNETWORK=
    PKG_CHECK_MODULES(_QTNETWORK, QtNetwork >= 4.7,
                      MOZ_ENABLE_QTNETWORK=1,
                      MOZ_ENABLE_QTNETWORK=)

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

    MOZ_ENABLE_QTMOBILITY=
    PKG_CHECK_MODULES(_QTMOBILITY, QtSensors,
                      MOZ_ENABLE_QTMOBILITY=1,
                      MOZ_ENABLE_QTMOBILITY=)
    if test "$MOZ_ENABLE_QTMOBILITY"; then
       MOZ_ENABLE_QTMOBILITY=1
       MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS $_QTMOBILITY_CFLAGS"
       MOZ_QT_LIBS="$MOZ_QT_LIBS $_QTMOBILITY_LIBS"
    else
       AC_CHECK_LIB(QtSensors, main, [
          MOZ_ENABLE_QTMOBILITY=1
          MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I/usr/include/qt4/QtMobility"
          MOZ_QT_CFLAGS="$MOZ_QT_CFLAGS -I/usr/include/qt4/QtSensors"
          MOZ_QT_LIBS="$MOZ_QT_LIBS -lQtSensors"
       ])
    fi
    if test "$MOZ_ENABLE_QTMOBILITY"; then
       AC_DEFINE(MOZ_ENABLE_QTMOBILITY)
    fi
fi

AC_SUBST(GTK_CONFIG)
AC_SUBST(TK_CFLAGS)
AC_SUBST(TK_LIBS)

AC_SUBST(MOZ_ENABLE_GTK2)
AC_SUBST(MOZ_ENABLE_QT)
AC_SUBST(MOZ_ENABLE_QTNETWORK)
AC_SUBST(MOZ_ENABLE_QMSYSTEM2)
AC_SUBST(MOZ_ENABLE_QTMOBILITY)
AC_SUBST(MOZ_ENABLE_XREMOTE)
AC_SUBST(MOZ_GTK2_CFLAGS)
AC_SUBST(MOZ_GTK2_LIBS)
AC_SUBST(MOZ_QT_CFLAGS)
AC_SUBST(MOZ_QT_LIBS)

AC_SUBST(MOC)

AC_SUBST(MOZ_DFB)
AC_SUBST(MOZ_X11)

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 = Trademarked Branding 
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(official-branding,
[  --enable-official-branding
                          Enable Official mozilla.org Branding
                          Do not distribute builds with
                          --enable-official-branding unless you have
                          permission to use trademarks per
                          http://www.mozilla.org/foundation/trademarks/ .],
[
  if test -z "$MOZ_OFFICIAL_BRANDING_DIRECTORY"; then
    AC_MSG_ERROR([You must specify MOZ_OFFICIAL_BRANDING_DIRECTORY to use --enable-official-branding.])
  else
    MOZ_BRANDING_DIRECTORY=${MOZ_OFFICIAL_BRANDING_DIRECTORY}
    MOZ_OFFICIAL_BRANDING=1
  fi
], MOZ_OFFICIAL_BRANDING=)

AC_SUBST(MOZ_OFFICIAL_BRANDING)
if test -n "$MOZ_OFFICIAL_BRANDING"; then
  AC_DEFINE(MOZ_OFFICIAL_BRANDING)
fi

MOZ_ARG_WITH_STRING(branding,
[  --with-branding=dir     Use branding from the specified directory.],
    MOZ_BRANDING_DIRECTORY=$withval)

REAL_BRANDING_DIRECTORY="${MOZ_BRANDING_DIRECTORY}"
if test -z "$REAL_BRANDING_DIRECTORY"; then
  REAL_BRANDING_DIRECTORY=${MOZ_BUILD_APP}/branding/nightly
fi

if test -f "${_topsrcdir}/$REAL_BRANDING_DIRECTORY/configure.sh"; then
  . "${_topsrcdir}/$REAL_BRANDING_DIRECTORY/configure.sh"
fi

AC_SUBST(MOZ_BRANDING_DIRECTORY)

dnl ========================================================
dnl = Distribution ID
dnl ========================================================
MOZ_ARG_WITH_STRING(distribution-id,
[  --with-distribution-id=ID
                          Set distribution-specific id (default=org.mozilla)],
[ val=`echo $withval`
    MOZ_DISTRIBUTION_ID="$val"])

if test -z "$MOZ_DISTRIBUTION_ID"; then
   MOZ_DISTRIBUTION_ID="org.mozilla"
fi

AC_DEFINE_UNQUOTED(MOZ_DISTRIBUTION_ID,"$MOZ_DISTRIBUTION_ID")
AC_SUBST(MOZ_DISTRIBUTION_ID)


dnl ========================================================
dnl complex text support off by default
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(pango,
[  --disable-pango         Disable usage of Pango ],
    MOZ_PANGO=,
    MOZ_PANGO=1)

dnl ========================================================
dnl = Pango
dnl ========================================================
if test "$MOZ_ENABLE_GTK2"
then
    AC_SUBST(MOZ_PANGO)

    PKG_CHECK_MODULES(_PANGOCHK, pango >= $PANGO_VERSION)

    PKG_CHECK_MODULES(MOZ_PANGO, pango >= $PANGO_VERSION pangoft2 >= $PANGO_VERSION pangocairo >= $PANGO_VERSION)
    AC_SUBST(MOZ_PANGO_CFLAGS)
    AC_SUBST(MOZ_PANGO_LIBS)
    if test "$MOZ_PANGO"
    then
        AC_DEFINE(MOZ_PANGO)
    else
        PKG_CHECK_MODULES(FT2, freetype2 > 6.1.0 fontconfig)
        AC_SUBST(FT2_CFLAGS)
        AC_SUBST(FT2_LIBS)
    fi
fi

if test "$MOZ_ENABLE_QT"
then
    if test "$MOZ_PANGO"
    then
        PKG_CHECK_MODULES(MOZ_PANGO, [pango >= $PANGO_VERSION pangoft2 >= $PANGO_VERSION pangocairo >= $PANGO_VERSION],
        [
            AC_SUBST(MOZ_PANGO_CFLAGS)
            AC_SUBST(MOZ_PANGO_LIBS)
            AC_DEFINE(MOZ_PANGO)
        ],
        [
            echo "Pango library not found, will use FT2 font engine"
            MOZ_PANGO=
        ])
    fi
    AC_SUBST(MOZ_PANGO)
fi

dnl ========================================================
dnl = GnomeVFS, GIO and GConf support module
dnl ========================================================

if test "$MOZ_X11"
then
    dnl build the gnomevfs extension by default only when the
    dnl GTK2 toolkit is in use.
    if test "$MOZ_ENABLE_GTK2"
    then
        MOZ_ENABLE_GNOMEVFS=1
        MOZ_ENABLE_GCONF=1
    fi

    dnl ========================================================
    dnl = GnomeVFS support module
    dnl ========================================================
    MOZ_ARG_DISABLE_BOOL(gnomevfs,
    [  --disable-gnomevfs      Disable GnomeVFS support ],
        MOZ_ENABLE_GNOMEVFS=,
        MOZ_ENABLE_GNOMEVFS=force)

    if test "$MOZ_ENABLE_GNOMEVFS"
    then
        PKG_CHECK_MODULES(MOZ_GNOMEVFS, gnome-vfs-2.0 >= $GNOMEVFS_VERSION gnome-vfs-module-2.0 >= $GNOMEVFS_VERSION,[
            MOZ_GNOMEVFS_LIBS=`echo $MOZ_GNOMEVFS_LIBS | sed 's/-llinc\>//'`
            MOZ_ENABLE_GNOMEVFS=1
            AC_DEFINE(MOZ_ENABLE_GNOMEVFS)
        ],[
            if test "$MOZ_ENABLE_GNOMEVFS" = "force"
            then
                AC_MSG_ERROR([* * * Could not find gnome-vfs-module-2.0 >= $GNOMEVFS_VERSION])
            fi
            MOZ_ENABLE_GNOMEVFS=
        ])
    else
        if test `echo "$MOZ_EXTENSIONS" | grep -c gnomevfs` -ne 0; then
            PKG_CHECK_MODULES(MOZ_GNOMEVFS, gnome-vfs-2.0 >= $GNOMEVFS_VERSION gnome-vfs-module-2.0 >= $GNOMEVFS_VERSION,[
              MOZ_GNOMEVFS_LIBS=`echo $MOZ_GNOMEVFS_LIBS | sed 's/-llinc\>//'`
            ])
        fi
    fi

    AC_SUBST(MOZ_ENABLE_GNOMEVFS)
    AC_SUBST(MOZ_GNOMEVFS_CFLAGS)
    AC_SUBST(MOZ_GNOMEVFS_LIBS)

    dnl ========================================================
    dnl = GIO support module
    dnl ========================================================
    MOZ_ARG_ENABLE_BOOL(gio,
    [  --enable-gio            Enable GIO support (default: disabled)],
        MOZ_ENABLE_GIO=force,
        MOZ_ENABLE_GIO=)

    if test "$MOZ_ENABLE_GIO" -a "$MOZ_ENABLE_GTK2"
    then
        PKG_CHECK_MODULES(_GTKCHECK, gtk+-2.0 >= 2.14, , 
                          [AC_MSG_ERROR([* * * Could not find gtk+-2.0 > 2.14. Required for build with gio.])])
        PKG_CHECK_MODULES(MOZ_GIO, gio-2.0 >= $GIO_VERSION,[
            MOZ_GIO_LIBS=`echo $MOZ_GIO_LIBS | sed 's/-llinc\>//'`
            MOZ_ENABLE_GIO=1
            AC_DEFINE(MOZ_ENABLE_GIO)
        ],[
            if test "$MOZ_ENABLE_GIO" = "force"
            then
                AC_MSG_ERROR([* * * Could not find gio-2.0 >= $GIO_VERSION])
            fi
            MOZ_ENABLE_GIO=
        ])
    fi

    AC_SUBST(MOZ_ENABLE_GIO)
    AC_SUBST(MOZ_GIO_CFLAGS)
    AC_SUBST(MOZ_GIO_LIBS)
   
    dnl ========================================================
    dnl = GConf support module
    dnl ========================================================
    MOZ_ARG_DISABLE_BOOL(gconf,
    [  --disable-gconf      Disable Gconf support ],
        MOZ_ENABLE_GCONF=,
        MOZ_ENABLE_GCONF=force)

    if test "$MOZ_ENABLE_GCONF"
    then
        PKG_CHECK_MODULES(MOZ_GCONF, gconf-2.0 >= $GCONF_VERSION gobject-2.0 ,[
            MOZ_GCONF_LIBS=`echo $MOZ_GCONF_LIBS | sed 's/-llinc\>//'`
            MOZ_ENABLE_GCONF=1
        ],[
            if test "$MOZ_ENABLE_GCONF" = "force"
            then
                AC_MSG_ERROR([* * * Could not find gconf-2.0 ])
            fi
            MOZ_ENABLE_GCONF=
        ])
    fi

    if test "$MOZ_ENABLE_GCONF"; then
        AC_DEFINE(MOZ_ENABLE_GCONF)
    fi

    AC_SUBST(MOZ_ENABLE_GCONF)
    AC_SUBST(MOZ_GCONF_CFLAGS)
    AC_SUBST(MOZ_GCONF_LIBS)
fi

dnl ========================================================
dnl = libproxy support
dnl ========================================================

if test "$MOZ_ENABLE_GTK2" -o "$MOZ_ENABLE_QT"
then
    MOZ_ENABLE_LIBPROXY=

    MOZ_ARG_ENABLE_BOOL(libproxy,
    [  --enable-libproxy         Enable libproxy support ],
    MOZ_ENABLE_LIBPROXY=1,
    MOZ_ENABLE_LIBPROXY=)

    if test "$MOZ_ENABLE_LIBPROXY"
    then
        PKG_CHECK_MODULES(MOZ_LIBPROXY, libproxy-1.0)
        AC_DEFINE(MOZ_ENABLE_LIBPROXY)
    fi
fi
AC_SUBST(MOZ_ENABLE_LIBPROXY)
AC_SUBST(MOZ_LIBPROXY_CFLAGS)
AC_SUBST(MOZ_LIBPROXY_LIBS)

dnl ========================================================
dnl = libnotify support
dnl ========================================================

if test "$MOZ_ENABLE_GTK2"
then
    MOZ_ENABLE_LIBNOTIFY=1

    MOZ_ARG_DISABLE_BOOL(libnotify,
    [  --disable-libnotify     Disable libnotify support ],
    MOZ_ENABLE_LIBNOTIFY=,
    MOZ_ENABLE_LIBNOTIFY=1)

    if test "$MOZ_ENABLE_LIBNOTIFY"
    then
        AC_DEFINE(MOZ_ENABLE_LIBNOTIFY)
    fi
fi

if test -z "$SKIP_LIBRARY_CHECKS"
then
    if test "$MOZ_ENABLE_GTK2"
    then
        if test "$MOZ_ENABLE_LIBNOTIFY"
        then
            PKG_CHECK_MODULES(MOZ_LIBNOTIFY, libnotify >= $LIBNOTIFY_VERSION)
        fi
    fi
fi
AC_SUBST(MOZ_ENABLE_LIBNOTIFY)
AC_SUBST(MOZ_LIBNOTIFY_CFLAGS)
AC_SUBST(MOZ_LIBNOTIFY_LIBS)

dnl ========================================================
dnl = GNOME component (mozgnome)
dnl ========================================================

# The GNOME component is built if one of 
# gnome-vfs, gio, gconf or libnotify is available.
if test "$MOZ_ENABLE_GCONF" -o \
   "$MOZ_ENABLE_GNOMEVFS" -o \
   "$MOZ_ENABLE_GIO" -o \
   "$MOZ_ENABLE_LIBNOTIFY"; then
    MOZ_ENABLE_GNOME_COMPONENT=1
else
    MOZ_ENABLE_GNOME_COMPONENT=
fi
AC_SUBST(MOZ_ENABLE_GNOME_COMPONENT)

dnl ========================================================
dnl = libgnomeui support module
dnl ========================================================

if test "$MOZ_ENABLE_GTK2"
then
    MOZ_ENABLE_GNOMEUI=1

    MOZ_ARG_DISABLE_BOOL(gnomeui,
    [  --disable-gnomeui       Disable libgnomeui support (default: auto, optional at runtime) ],
        MOZ_ENABLE_GNOMEUI=,
        MOZ_ENABLE_GNOMEUI=force)

    if test "$MOZ_ENABLE_GNOMEUI"
    then
        PKG_CHECK_MODULES(MOZ_GNOMEUI, libgnomeui-2.0 >= $GNOMEUI_VERSION,
        [
            MOZ_GNOMEUI_LIBS=`echo $MOZ_GNOMEUI_LIBS | sed 's/-llinc\>//'`
            MOZ_ENABLE_GNOMEUI=1
        ],[
            if test "$MOZ_ENABLE_GNOMEUI" = "force"
            then
                AC_MSG_ERROR([* * * Could not find libgnomeui-2.0 >= $GNOMEUI_VERSION])
            fi
            MOZ_ENABLE_GNOMEUI=
        ])
    fi

    if test "$MOZ_ENABLE_GNOMEUI"; then
        AC_DEFINE(MOZ_ENABLE_GNOMEUI)
    fi
fi

AC_SUBST(MOZ_ENABLE_GNOMEUI)
AC_SUBST(MOZ_GNOMEUI_CFLAGS)
AC_SUBST(MOZ_GNOMEUI_LIBS)

dnl ========================================================
dnl = dbus support
dnl ========================================================

if test "$MOZ_ENABLE_GTK2" -o "$MOZ_ENABLE_QT"
then
    MOZ_ENABLE_DBUS=1

    MOZ_ARG_DISABLE_BOOL(dbus,
    [  --disable-dbus          Disable dbus support ],
        MOZ_ENABLE_DBUS=,
        MOZ_ENABLE_DBUS=1)

    if test "$MOZ_ENABLE_DBUS"
    then
        PKG_CHECK_MODULES(MOZ_DBUS, dbus-1 >= $DBUS_VERSION)
        PKG_CHECK_MODULES(MOZ_DBUS_GLIB, dbus-glib-1 >= $DBUS_VERSION)
        AC_DEFINE(MOZ_ENABLE_DBUS)
    fi
fi
AC_SUBST(MOZ_ENABLE_DBUS)
AC_SUBST(MOZ_DBUS_CFLAGS)
AC_SUBST(MOZ_DBUS_LIBS)
AC_SUBST(MOZ_DBUS_GLIB_CFLAGS)
AC_SUBST(MOZ_DBUS_GLIB_LIBS)

dnl ========================================================
dnl = Build Personal Security Manager
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(crypto,
[  --disable-crypto        Disable crypto support (Personal Security Manager)],
    MOZ_PSM=,
    MOZ_PSM=1 )

dnl ========================================================
dnl = JS Debugger XPCOM component (js/jsd)
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(jsd,
[  --disable-jsd           Disable JavaScript debug library],
    MOZ_JSDEBUGGER=,
    MOZ_JSDEBUGGER=1)


dnl ========================================================
dnl = Enable IPDL's "expensive" unit tests
dnl ========================================================
MOZ_IPDL_TESTS=

MOZ_ARG_ENABLE_BOOL(ipdl-tests,
[  --enable-ipdl-tests     Enable expensive IPDL tests],
    MOZ_IPDL_TESTS=1,
    MOZ_IPDL_TESTS=)

if test -n "$MOZ_IPDL_TESTS"; then
    AC_DEFINE(MOZ_IPDL_TESTS)
fi

AC_SUBST(MOZ_IPDL_TESTS)

dnl ========================================================
dnl = Turns off code necessary for e10s compatibility
dnl ========================================================
dnl This is a temporary flag to be removed in bug 662601 when
dnl it's no longer needed

MOZ_E10S_COMPAT=

MOZ_ARG_ENABLE_BOOL(e10s-compat,
[  --enable-e10s-compat     Turns off code for e10s compat],
    MOZ_E10S_COMPAT=1,
    MOZ_E10S_COMPAT=)

if test -n "$MOZ_E10S_COMPAT"; then
    AC_DEFINE(MOZ_E10S_COMPAT)
fi

dnl ========================================================
dnl = Disable building dbm
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(dbm,
[  --disable-dbm           Disable building dbm],
    NSS_DISABLE_DBM=1,
    NSS_DISABLE_DBM=)

dnl bi-directional support always on
IBMBIDI=1
AC_DEFINE(IBMBIDI)

dnl ========================================================
dnl accessibility support on by default on all platforms 
dnl except OS X.
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(accessibility,
[  --disable-accessibility Disable accessibility support (off by default on OS X)],
    ACCESSIBILITY=,
    ACCESSIBILITY=1 )
if test "$ACCESSIBILITY"; then
    AC_DEFINE(ACCESSIBILITY)
fi

if test -n "$ACCESSIBILITY" -a "$COMPILE_ENVIRONMENT" = "1"; then
case "$target" in
*-mingw*)
    if test "$ac_cv_header_atlbase_h" = "no"; then
        AC_MSG_ERROR([System header atlbase.h is not available. See http://developer.mozilla.org/en/docs/atlbase.h for details on fixing this problem.])
    fi
    if test "$ac_cv_header_oleacc_idl" = "no"; then
        AC_MSG_ERROR([System header oleacc.idl is not available. See http://developer.mozilla.org/en/docs/oleacc.idl for details on fixing this problem.])
    fi
    ;;
esac
fi

dnl ========================================================
dnl Disable printing
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(printing,
[  --disable-printing      Disable printing support],
    NS_PRINTING=,
    NS_PRINTING=1)

if test "$NS_PRINTING"; then
    AC_DEFINE(NS_PRINTING)
    AC_DEFINE(NS_PRINT_PREVIEW)
fi

dnl ========================================================
dnl = Enable Raw Codecs
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(raw,
[  --enable-raw           Enable support for RAW media],
    MOZ_RAW=1,
    MOZ_RAW=)

if test -n "$MOZ_RAW"; then
    AC_DEFINE(MOZ_RAW)
    MOZ_MEDIA=1
fi

AC_SUBST(MOZ_RAW)

dnl ========================================================
dnl = Disable Ogg Codecs
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(ogg,
[  --disable-ogg           Disable support for OGG media (Theora video and Vorbis audio)],
    MOZ_OGG=,
    MOZ_OGG=1)

if test -n "$MOZ_OGG"; then
    AC_DEFINE(MOZ_OGG)
    MOZ_SYDNEYAUDIO=1
    MOZ_MEDIA=1
    case "$target_cpu" in
    arm*)
        MOZ_TREMOR=1
    ;;
    *)
        MOZ_VORBIS=1
    ;;
    esac

    dnl Checks for __attribute__(aligned()) directive
    AC_CACHE_CHECK([__attribute__ ((aligned ())) support],
        [ac_cv_c_attribute_aligned],
        [ac_cv_c_attribute_aligned=0
         CFLAGS_save="${CFLAGS}"
         CFLAGS="${CFLAGS} -Werror"
         for ac_cv_c_attr_align_try in 64 32 16 8; do
           echo "trying $ac_cv_c_attr_align_try"
           AC_TRY_COMPILE([],
                          [static char c __attribute__ ((aligned(${ac_cv_c_attr_align_try}))) = 0; return c;],
                          [ac_cv_c_attribute_aligned="${ac_cv_c_attr_align_try}"])
           if test "$ac_cv_c_attribute_aligned" != 0; then
             break;
           fi
         done
           CFLAGS="${CFLAGS_save}"])
    if test "${ac_cv_c_attribute_aligned}" != "0"; then
      AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX],
                         [${ac_cv_c_attribute_aligned}],[Maximum supported data alignment])
    fi
fi

dnl ========================================================
dnl = Disable VP8 decoder support
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(webm,
[  --disable-webm          Disable support for WebM media (VP8 video and Vorbis audio)],
    MOZ_WEBM=,
    MOZ_WEBM=1)

dnl system libvpx Support
dnl ========================================================
MOZ_ARG_WITH_STRING(system-libvpx,
[  --with-system-libvpx=[PFX]
                          Use system libvpx [installed at prefix PFX]],
    LIBVPX_DIR=$withval)

MOZ_NATIVE_LIBVPX=
MOZ_LIBVPX_INCLUDES=
MOZ_LIBVPX_LIBS=

if test -n "$MOZ_WEBM"; then
    AC_DEFINE(MOZ_WEBM)

    if test -n "$LIBVPX_DIR" -a "$LIBVPX_DIR" != no; then
        _SAVE_CFLAGS=$CFLAGS
        _SAVE_LDFLAGS=$LDFLAGS
        _SAVE_LIBS=$LIBS
        if test "${LIBVPX_DIR}" = "yes"; then
            LIBVPX_DIR=/usr
        fi
        CFLAGS="-I${LIBVPX_DIR}/include $CFLAGS"
        LDFLAGS="-L${LIBVPX_DIR}/lib $LDFLAGS"
        MOZ_CHECK_HEADER(vpx/vpx_decoder.h,
            [if test ! -f "${LIBVPX_DIR}/include/vpx/vpx_decoder.h"; then
             AC_MSG_ERROR([vpx/vpx_decoder.h found, but is not in ${LIBVPX_DIR}/include])
            fi],
            AC_MSG_ERROR([--with-system-libvpx requested but vpx/vpx_decoder.h not found]))
        AC_CHECK_LIB(vpx, vpx_codec_dec_init_ver,
                     [MOZ_NATIVE_LIBVPX=1
                      MOZ_LIBVPX_INCLUDES="-I${LIBVPX_DIR}/include"
                      MOZ_LIBVPX_LIBS="-L${LIBVPX_DIR}/lib -lvpx"],
                     ([--with-system-libvpx requested but symbol vpx_codec_dec_init_ver not found]))
        CFLAGS=$_SAVE_CFLAGS
        LDFLAGS=$_SAVE_LDFLAGS
        LIBS=$_SAVE_LIBS
    fi
fi

AC_SUBST(MOZ_NATIVE_LIBVPX)
AC_SUBST(MOZ_LIBVPX_INCLUDES)
AC_SUBST(MOZ_LIBVPX_LIBS)

if test -n "$MOZ_WEBM" -a -z "$MOZ_NATIVE_LIBVPX"; then
    MOZ_SYDNEYAUDIO=1
    MOZ_MEDIA=1
    case "$target_cpu" in
    arm*)
        MOZ_TREMOR=1
    ;;
    *)
        MOZ_VORBIS=1
    ;;
    esac


    dnl Detect if we can use an assembler to compile optimized assembly for libvpx.
    dnl We currently require yasm on all x86 platforms and require yasm 1.1.0 on Win32.
    dnl We currently require gcc on all arm platforms.
    VPX_AS=$YASM
    VPX_ASM_SUFFIX=asm

    dnl See if we have assembly on this platform.  
    case "$OS_ARCH:$CPU_ARCH" in
    Linux:x86)
      VPX_ASFLAGS="-f elf32 -rnasm -pnasm"
      VPX_X86_ASM=1
    ;;
    Linux:x86_64)
      VPX_ASFLAGS="-f elf64 -rnasm -pnasm -DPIC"
      VPX_X86_ASM=1
    ;;
    SunOS:x86)
      VPX_ASFLAGS="-f elf32 -rnasm -pnasm"
      VPX_X86_ASM=1
    ;;
    SunOS:x86_64)
      VPX_ASFLAGS="-f elf64 -rnasm -pnasm -DPIC"
      VPX_X86_ASM=1
    ;;
    Darwin:x86)
      VPX_ASFLAGS="-f macho32 -rnasm -pnasm -DPIC"
      VPX_X86_ASM=1
    ;;
    Darwin:x86_64)
      VPX_ASFLAGS="-f macho64 -rnasm -pnasm -DPIC"
      VPX_X86_ASM=1
    ;;
    WINNT:x86_64)
      if test -z "$GNU_CC"; then
        VPX_ASFLAGS="-f x64 -rnasm -pnasm"
        VPX_X86_ASM=1
      fi
    ;;
    WINNT:x86)
      if test -z "$GNU_CC"; then
        dnl Check for yasm 1.1 or greater.
        if test -n "$COMPILE_ENVIRONMENT" -a -z "$YASM"; then
          AC_MSG_ERROR([yasm 1.1 or greater is required to build libvpx on Win32, but it appears not to be installed.  Install it (included in MozillaBuild 1.5.1 and newer) or configure with --disable-webm (which disables the WebM video format). See https://developer.mozilla.org/en/YASM for more details.])
        elif test -n "$COMPILE_ENVIRONMENT" -a "$_YASM_MAJOR_VERSION" -lt "1" -o \( "$_YASM_MAJOR_VERSION" -eq "1" -a "$_YASM_MINOR_VERSION" -lt "1" \) ; then
          AC_MSG_ERROR([yasm 1.1 or greater is required to build libvpx on Win32, but you appear to have version $_YASM_MAJOR_VERSION.$_YASM_MINOR_VERSION.  Upgrade to the newest version (included in MozillaBuild 1.5.1 and newer) or configure with --disable-webm (which disables the WebM video format). See https://developer.mozilla.org/en/YASM for more details.])
        else
          VPX_ASFLAGS="-f win32 -rnasm -pnasm -DPIC"
          VPX_X86_ASM=1
        fi
      fi
    ;;
    *:arm*)
      if test -n "$GNU_AS" ; then
        VPX_AS=$AS
        dnl These flags are a lie; they're just used to enable the requisite
        dnl opcodes; actual arch detection is done at runtime.
        VPX_ASFLAGS="-march=armv7-a -mfpu=neon"
        VPX_DASH_C_FLAG="-c"
        VPX_AS_CONVERSION='$(PERL) $(topsrcdir)/media/libvpx/build/make/ads2gas.pl'
        VPX_ASM_SUFFIX="$ASM_SUFFIX"
        VPX_ARM_ASM=1
      fi
    esac

    if test -n "$COMPILE_ENVIRONMENT" -a -n "$VPX_X86_ASM" -a -z "$VPX_AS"; then
      AC_MSG_ERROR([yasm is a required build tool for this architecture when webm is enabled. You may either install yasm or --disable-webm (which disables the WebM video format). See https://developer.mozilla.org/en/YASM for more details.])
    fi

    if test -n "$VPX_X86_ASM"; then
      AC_DEFINE(VPX_X86_ASM)
    elif test -n "$VPX_ARM_ASM"; then
      AC_DEFINE(VPX_ARM_ASM)
    else
      AC_MSG_WARN([No assembler or assembly support for libvpx. Using unoptimized C routines.])
    fi
fi

dnl ========================================================
dnl = Disable Wave decoder support
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(wave,
[  --disable-wave          Disable Wave decoder support],
    MOZ_WAVE=,
    MOZ_WAVE=1)

if test -n "$MOZ_WAVE"; then
    AC_DEFINE(MOZ_WAVE)
    MOZ_SYDNEYAUDIO=1
    MOZ_MEDIA=1
fi

dnl ========================================================
dnl = Handle dependent SYDNEYAUDIO and MEDIA defines
dnl ========================================================

if test -n "$MOZ_SYDNEYAUDIO"; then
    AC_DEFINE(MOZ_SYDNEYAUDIO)
fi

if test -n "$MOZ_MEDIA"; then
    AC_DEFINE(MOZ_MEDIA)
fi

if test -n "$MOZ_VORBIS" -a -n "$MOZ_TREMOR"; then
    AC_MSG_ERROR([MOZ_VORBIS and MOZ_TREMOR are mutually exclusive!  The build system should not allow them both to be set, but they are.  Please file a bug at https://bugzilla.mozilla.org/])
fi

if test -n "$MOZ_VORBIS"; then
    AC_DEFINE(MOZ_VORBIS)
fi

if test -n "$MOZ_TREMOR"; then
    AC_DEFINE(MOZ_TREMOR)
fi

dnl ========================================================
dnl = Check alsa availability on Linux if using sydneyaudio
dnl ========================================================

dnl If using sydneyaudio with Linux, ensure that the alsa library is available
if test -n "$MOZ_SYDNEYAUDIO"; then
   case "$target_os" in
linux*)
      PKG_CHECK_MODULES(MOZ_ALSA, alsa, ,
         [echo "$MOZ_ALSA_PKG_ERRORS"
          AC_MSG_ERROR([Need alsa for Ogg, Wave or WebM decoding on Linux.  Disable with --disable-ogg --disable-wave --disable-webm.  (On Ubuntu, you might try installing the package libasound2-dev.)])])
      ;;
   esac
fi

dnl ========================================================
dnl Permissions System
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(permissions,
[  --disable-permissions   Disable permissions (popup and cookie blocking)],
    MOZ_PERMISSIONS=,
    MOZ_PERMISSIONS=1
)

dnl ========================================================
dnl NegotiateAuth
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(negotiateauth,
[  --disable-negotiateauth Disable GSS-API negotiation ],
    MOZ_AUTH_EXTENSION=,
    MOZ_AUTH_EXTENSION=1 )

dnl ========================================================
dnl XTF
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(xtf,
[  --disable-xtf           Disable XTF (pluggable xml tags) support],
    MOZ_XTF=,
    MOZ_XTF=1 )
if test "$MOZ_XTF"; then
  AC_DEFINE(MOZ_XTF)
fi

dnl ========================================================
dnl Pref extensions (autoconfig and system-pref)
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(pref-extensions,
[  --disable-pref-extensions
                          Disable pref extensions such as autoconfig and
                          system-pref],
  MOZ_PREF_EXTENSIONS=,
  MOZ_PREF_EXTENSIONS=1 )

dnl ========================================================
dnl = Universalchardet
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(universalchardet,
[  --disable-universalchardet
                          Disable universal encoding detection],
  MOZ_UNIVERSALCHARDET=,
  MOZ_UNIVERSALCHARDET=1 )

if test -n "${JAVA_BIN_PATH}"; then
  dnl Look for javac and jar in the specified path.
  JAVA_PATH="$JAVA_BIN_PATH"
else
  dnl No path specified, so look for javac and jar in $JAVA_HOME & $PATH.
  JAVA_PATH="$JAVA_HOME/bin:$PATH"
fi

MOZ_PATH_PROG(JAVA, java, :, [$JAVA_PATH])
MOZ_PATH_PROG(JAVAC, javac, :, [$JAVA_PATH])
MOZ_PATH_PROG(JAR, jar, :, [$JAVA_PATH])

if test -n "${JAVA_BIN_PATH}" -o "$OS_TARGET" = Android; then
  if test -z "$JAVA" -o "$JAVA" = ":" -o -z "$JAVAC" -o "$JAVAC" = ":" -o -z "$JAR" -o "$JAR" = ":"; then
    AC_MSG_ERROR([The programs java, javac and jar were not found.  Set \$JAVA_HOME to your java sdk directory or use --with-java-bin-path={java-bin-dir}])
  fi
fi

dnl ========================================================
dnl = ANGLE OpenGL->D3D translator for WebGL
dnl = * only applies to win32
dnl = * enabled by default (shipping build); requires explicit --disable to disable
dnl ========================================================
MOZ_ANGLE=
MOZ_DIRECTX_SDK_PATH=
MOZ_DIRECTX_SDK_CPU_SUFFIX=
MOZ_D3DX9_VERSION=
MOZ_D3DX9_CAB=
MOZ_D3DCOMPILER_CAB=
MOZ_D3DX9_DLL=
MOZ_D3DCOMPILER_DLL=
case "$target_os" in
*mingw*)
    MOZ_ANGLE=1
    ;;
esac

# The DirectX SDK libraries are split into x86 and x64 sub-directories
case "${target_cpu}" in
i*86)
  MOZ_DIRECTX_SDK_CPU_SUFFIX=x86
  ;;
x86_64)
  MOZ_DIRECTX_SDK_CPU_SUFFIX=x64
  ;;
esac

if test -n "$MOZ_ANGLE"; then
MOZ_ARG_DISABLE_BOOL(angle,
[  --disable-angle     Disable building of ANGLE for WebGL->D3D translation],
    MOZ_ANGLE=,
    MOZ_ANGLE=1)

if test -n "$MOZ_ANGLE"; then
  if test -z "$_WIN32_MSVC"; then
    AC_MSG_ERROR([Building ANGLE requires MSVC.  To build without ANGLE, reconfigure with --disable-angle.])
  fi

  # Get the SDK path from the registry.
  # First try to get the June 2010 SDK
  MOZ_DIRECTX_SDK_REG_KEY=`reg query 'HKLM\Software\Microsoft\DirectX' //s | grep 'Microsoft DirectX SDK (June 2010)' | head -n 1`
  if test -z "$MOZ_DIRECTX_SDK_REG_KEY" ; then
    # Otherwise just take whatever comes first
    MOZ_DIRECTX_SDK_REG_KEY=`reg query 'HKLM\Software\Microsoft\DirectX' //s | grep 'Microsoft DirectX SDK' | head -n 1`
  fi

  if test -n "`echo $MOZ_DIRECTX_SDK_REG_KEY | grep 'February 2010'`" ; then
    AC_MSG_ERROR([Found the February 2010 DirectX SDK. This is too old. We now require the June 2010 DirectX SDK, or newer.  Upgrade your SDK or to explicitly build without ANGLE, reconfigure with --disable-angle.])
  else
    MOZ_DIRECTX_SDK_PATH=`reg query "$MOZ_DIRECTX_SDK_REG_KEY" //v InstallPath | grep REG_SZ | sed 's/.*\([[a-zA-Z]]\)\\:\\\\/\\1\\:\\\\/'`
  fi

  MOZ_ANGLE=

  if test -n "$MOZ_DIRECTX_SDK_PATH" ; then
    if test -f "$MOZ_DIRECTX_SDK_PATH"/include/d3dx9.h && test -f "$MOZ_DIRECTX_SDK_PATH"/lib/$MOZ_DIRECTX_SDK_CPU_SUFFIX/dxguid.lib ; then
      AC_MSG_RESULT([Found DirectX SDK via registry, using $MOZ_DIRECTX_SDK_PATH])
      MOZ_ANGLE=1
    fi
  fi

  if test -z "$MOZ_ANGLE" ; then
    AC_MSG_ERROR([Couldn't find the DirectX SDK, needed for ANGLE. Please install it (June 2010 or newer). To explicitly build without ANGLE, reconfigure with --disable-angle.])
  fi

  if test -n "$MOZ_ANGLE" ; then
    # Get the SDK numeric version (e.g. 43) by looking at the dependencies of d3dx9.lib
    MOZ_D3DX9_VERSION=`dumpbin //headers "$MOZ_DIRECTX_SDK_PATH"/lib/$MOZ_DIRECTX_SDK_CPU_SUFFIX/d3dx9.lib | egrep d3dx9_[[0-9]][[0-9]]\.dll | head -n1 | sed 's/.*\([[0-9]][[0-9]]\).*/\\1/g'`

    if test -z "$MOZ_D3DX9_VERSION" ; then
      AC_MSG_ERROR([Couldn't determine the D3DX9 version, needed for ANGLE. To explicitly build without ANGLE, reconfigure with --disable-angle.])
    fi

    if test -n "$MOZ_ANGLE" ; then
      MOZ_D3DX9_CAB=`find "$MOZ_DIRECTX_SDK_PATH"/Redist -name *d3dx9_${MOZ_D3DX9_VERSION}_${MOZ_DIRECTX_SDK_CPU_SUFFIX}.cab | head -n1`
      MOZ_D3DCOMPILER_CAB=`find "$MOZ_DIRECTX_SDK_PATH"/Redist -name *D3DCompiler_${MOZ_D3DX9_VERSION}_${MOZ_DIRECTX_SDK_CPU_SUFFIX}.cab | head -n1`

      MOZ_D3DX9_DLL=d3dx9_$MOZ_D3DX9_VERSION.dll
      MOZ_D3DCOMPILER_DLL=D3DCompiler_$MOZ_D3DX9_VERSION.dll
    fi
  fi
fi
fi

dnl ========================================================
dnl = Breakpad crash reporting (on by default on supported platforms)
dnl ========================================================

case $target in
i?86-*-mingw*|x86_64-*-mingw*)
  MOZ_CRASHREPORTER=1
  ;;
i?86-apple-darwin*|powerpc-apple-darwin*|x86_64-apple-darwin*)
  MOZ_CRASHREPORTER=1
  ;;
i?86-*-linux*|x86_64-*-linux*|arm-*-linux*)
  if test "$MOZ_ENABLE_GTK2"; then
    MOZ_CRASHREPORTER=1
  fi
  ;;
*-android*|*-linuxandroid*)
  MOZ_CRASHREPORTER=1
  ;;
*solaris*)
  MOZ_CRASHREPORTER=1
  ;;
esac

MOZ_ARG_DISABLE_BOOL(crashreporter,
[  --disable-crashreporter Disable breakpad crash reporting],
    MOZ_CRASHREPORTER=,
    MOZ_CRASHREPORTER=1)

if test -n "$MOZ_CRASHREPORTER"; then
   AC_DEFINE(MOZ_CRASHREPORTER)

  if (test "$OS_TARGET" = "Linux" -o "$OS_ARCH" = "SunOS") && \
    test -z "$SKIP_LIBRARY_CHECKS"; then
    PKG_CHECK_MODULES(MOZ_GTHREAD, gthread-2.0)
    AC_SUBST(MOZ_GTHREAD_CFLAGS)
    AC_SUBST(MOZ_GTHREAD_LIBS)

    MOZ_CHECK_HEADERS([curl/curl.h], [], [AC_MSG_ERROR([Couldn't find curl/curl.h which is required for the crash reporter.  Use --disable-crashreporter to disable the crash reporter.])])
  fi
fi

MOZ_ARG_WITH_STRING(crashreporter-enable-percent,
[  --with-crashreporter-enable-percent=NN
                          Enable sending crash reports by default on NN% of users. (default=100)],
[ val=`echo $withval | sed 's/[^0-9]//g'`
    MOZ_CRASHREPORTER_ENABLE_PERCENT="$val"])

if test -z "$MOZ_CRASHREPORTER_ENABLE_PERCENT"; then
   MOZ_CRASHREPORTER_ENABLE_PERCENT=100
fi
AC_DEFINE_UNQUOTED(MOZ_CRASHREPORTER_ENABLE_PERCENT, $MOZ_CRASHREPORTER_ENABLE_PERCENT)

dnl ========================================================
dnl = libjpeg-turbo configuration
dnl ========================================================
MOZ_LIBJPEG_TURBO=
if test -z "$SYSTEM_JPEG"; then
    MOZ_LIBJPEG_TURBO=1
fi

MOZ_ARG_DISABLE_BOOL(libjpeg_turbo,
[ --disable-libjpeg-turbo  Disable optimized jpeg decoding routines],
    MOZ_LIBJPEG_TURBO=,
    MOZ_LIBJPEG_TURBO=1)

if test "$SYSTEM_JPEG" = 1 -a "$MOZ_LIBJPEG_TURBO" = 1; then
    AC_MSG_ERROR([cannot use --with-system-jpeg with --enable-libjpeg-turbo.])
fi

dnl Detect if we can use yasm to compile libjpeg-turbo's optimized assembly
dnl files.

if test -n "$MOZ_LIBJPEG_TURBO"; then

  dnl Do we support libjpeg-turbo on this platform?
  case "$OS_ARCH:$OS_TEST" in
  Linux:x86|Linux:i?86)
    LIBJPEG_TURBO_ASFLAGS="-f elf32 -rnasm -pnasm -DPIC -DELF"
    LIBJPEG_TURBO_X86_ASM=1
  ;;
  Linux:x86_64)
    LIBJPEG_TURBO_ASFLAGS="-f elf64 -rnasm -pnasm -D__x86_64__ -DPIC -DELF"
    LIBJPEG_TURBO_X64_ASM=1
  ;;
  SunOS:i?86)
    LIBJPEG_TURBO_ASFLAGS="-f elf32 -rnasm -pnasm -DPIC -DELF"
    LIBJPEG_TURBO_X86_ASM=1
  ;;
  SunOS:x86_64)
    LIBJPEG_TURBO_ASFLAGS="-f elf64 -rnasm -pnasm -D__x86_64__ -DPIC -DELF"
    LIBJPEG_TURBO_X64_ASM=1
  ;;
  Darwin:i?86)
    LIBJPEG_TURBO_ASFLAGS="-f macho32 -rnasm -pnasm -DPIC -DMACHO"
    LIBJPEG_TURBO_X86_ASM=1
  ;;
  Darwin:x86_64)
    LIBJPEG_TURBO_ASFLAGS="-f macho64 -rnasm -pnasm -D__x86_64__ -DPIC -DMACHO"
    LIBJPEG_TURBO_X64_ASM=1
  ;;
  WINNT:x86|WINNT:i?86)
    LIBJPEG_TURBO_ASFLAGS="-f win32 -rnasm -pnasm -DPIC -DWIN32"
    LIBJPEG_TURBO_X86_ASM=1
  ;;
  WINNT:x86_64)
    LIBJPEG_TURBO_ASFLAGS="-f win64 -rnasm -pnasm -D__x86_64__ -DPIC -DWIN64 -DMSVC"
    LIBJPEG_TURBO_X64_ASM=1
  ;;
  esac

fi

dnl If we're on a system which supports libjpeg-turbo's asm routines and
dnl --disable-libjpeg-turbo wasn't passed, check for yasm, and error out if it
dnl doesn't exist or we have too old of a version.
if test -n "$LIBJPEG_TURBO_X86_ASM" -o -n "$LIBJPEG_TURBO_X64_ASM" ; then
    AC_MSG_CHECKING([for YASM assembler])
    AC_CHECK_PROGS(LIBJPEG_TURBO_AS, yasm, "")

    if test -z "$LIBJPEG_TURBO_AS" ; then
        AC_MSG_ERROR([yasm is required to build with libjpeg-turbo's optimized JPEG decoding routines, but you do not appear to have yasm installed.  Either install it or configure with --disable-libjpeg-turbo to use the pure C JPEG decoder.  See https://developer.mozilla.org/en/YASM for more details.])
    fi

    dnl Check that we have the right yasm version.  We require 1.0.1 or newer
    dnl on Linux and 1.1 or newer everywhere else.
    if test "$OS_ARCH" = "Linux" ; then
        if test "$_YASM_MAJOR_VERSION" -lt "1" -o \( "$_YASM_MAJOR_VERSION" -eq "1" -a "$_YASM_MINOR_VERSION" -eq "0" -a "$_YASM_RELEASE" -lt "1" \) ; then
            AC_MSG_ERROR([yasm 1.0.1 or greater is required to build with libjpeg-turbo's optimized JPEG decoding routines, but you appear to have version $_YASM_MAJOR_VERSION.$_YASM_MINOR_VERSION.$_YASM_RELEASE.  Upgrade to the newest version or configure with --disable-libjpeg-turbo to use the pure C JPEG decoder.  See https://developer.mozilla.org/en/YASM for more details.])
        fi
    else
        if test "$_YASM_MAJOR_VERSION" -lt "1" -o \( "$_YASM_MAJOR_VERSION" -eq "1" -a "$_YASM_MINOR_VERSION" -lt "1" \) ; then
            AC_MSG_ERROR([yasm 1.1 or greater is required to build with libjpeg-turbo's optimized JPEG decoding routines, but you appear to have version $_YASM_MAJOR_VERSION.$_YASM_MINOR_VERSION.  Upgrade to the newest version or configure with --disable-libjpeg-turbo to use the pure C JPEG decoder.  See https://developer.mozilla.org/en/YASM for more details.])
        fi
    fi
fi

if test -n "$LIBJPEG_TURBO_X86_ASM"; then
    AC_DEFINE(LIBJPEG_TURBO_X86_ASM)
elif test -n "$LIBJPEG_TURBO_X64_ASM"; then
    AC_DEFINE(LIBJPEG_TURBO_X64_ASM)
elif test -n "$MOZ_LIBJPEG_TURBO"; then
    dnl Warn if we're not building the optimized routines, even though the user
    dnl didn't specify --disable-libjpeg-turbo.
    AC_MSG_WARN([No assembler or assembly support for libjpeg-turbo.  Using unoptimized C routines.])
fi

dnl ========================================================
dnl = Enable compilation of specific extension modules
dnl ========================================================

MOZ_ARG_ENABLE_STRING(extensions,
[  --enable-extensions     Enable extensions],
[ for option in `echo $enableval | sed 's/,/ /g'`; do
    if test "$option" = "yes" -o "$option" = "all"; then
        AC_MSG_ERROR([--enable-extensions=$option is no longer supported.])
    elif test "$option" = "no" -o "$option" = "none"; then
        MOZ_EXTENSIONS=""
    elif test "$option" = "default"; then
        MOZ_EXTENSIONS="$MOZ_EXTENSIONS $MOZ_EXTENSIONS_DEFAULT"
    elif test `echo "$option" | grep -c \^-` != 0; then
        option=`echo $option | sed 's/^-//'`
        MOZ_EXTENSIONS=`echo "$MOZ_EXTENSIONS" | sed "s/ ${option}//"`
    else
        MOZ_EXTENSIONS="$MOZ_EXTENSIONS $option"
    fi
done],
    MOZ_EXTENSIONS="$MOZ_EXTENSIONS_DEFAULT")

if test -z "$MOZ_ENABLE_GNOMEVFS" -a -z "$MOZ_GNOMEVFS_LIBS" -a `echo "$MOZ_EXTENSIONS" | grep -c gnomevfs` -ne 0; then
    # Suppress warning on non-X11 platforms
    if test -n "$MOZ_X11"; then
        AC_MSG_WARN([Cannot build gnomevfs without required libraries. Removing gnomevfs from MOZ_EXTENSIONS.])
    fi
    MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|gnomevfs||'`
fi

dnl Do not build gnomevfs with libxul based apps
if test -n "$LIBXUL_SDK_DIR" -a `echo "$MOZ_EXTENSIONS" | grep -c gnomevfs` -ne 0; then
    MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|gnomevfs||'`
fi

if test -z "$MOZ_ENABLE_GIO" -a `echo "$MOZ_EXTENSIONS" | grep -c gio` -ne 0; then
    # Suppress warning on non-X11 platforms
    if test -n "$MOZ_X11"; then
        AC_MSG_WARN([Cannot build gio without required libraries. Removing gio from MOZ_EXTENSIONS.])
    fi
    MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|gio||'`
fi

dnl Do not build gio with libxul based apps
if test -n "$LIBXUL_SDK_DIR" -a `echo "$MOZ_EXTENSIONS" | grep -c gio` -ne 0; then
    MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|gio||'`
fi

if test -z "$MOZ_JSDEBUGGER" -a `echo "$MOZ_EXTENSIONS" | grep -c venkman` -ne 0; then
    AC_MSG_WARN([Cannot build venkman without JavaScript debug library. Removing venkman from MOZ_EXTENSIONS.])
    MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|venkman||'`
fi

dnl xforms requires xtf
if test -z "$MOZ_XTF" -a `echo "$MOZ_EXTENSIONS" | grep -c xforms` -ne 0; then
    AC_MSG_WARN([Cannot build XForms without XTF support.  Removing XForms from MOZ_EXTENSIONS.])
    MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's|xforms||g'`
fi

dnl Remove dupes
MOZ_EXTENSIONS=`${PERL} ${srcdir}/build/unix/uniq.pl ${MOZ_EXTENSIONS}`

dnl Ensure every extension exists, to avoid mostly-inscrutable error messages
dnl when trying to build a nonexistent extension.
for extension in $MOZ_EXTENSIONS; do
    if test ! -d "${srcdir}/extensions/${extension}"; then
        AC_MSG_ERROR([Unrecognized extension provided to --enable-extensions: ${extension}.])
    fi
done

if test -n "$MOZ_USE_NATIVE_POPUP_WINDOWS"; then
  AC_DEFINE(MOZ_USE_NATIVE_POPUP_WINDOWS)
fi

dnl ========================================================
dnl SVG Display Lists
dnl ========================================================
if test -n "$MOZ_SVG_DLISTS"; then
  AC_DEFINE(MOZ_SVG_DLISTS)
fi

dnl ========================================================
dnl SMIL
dnl ========================================================
MOZ_SMIL=1
MOZ_ARG_DISABLE_BOOL(smil,
[  --disable-smil          Disable SMIL animation support],
    MOZ_SMIL=,
    MOZ_SMIL=1 )
if test -n "$MOZ_SMIL"; then
  AC_DEFINE(MOZ_SMIL)
fi

dnl ========================================================
dnl Build Freetype in the tree
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(tree-freetype,
[  --enable-tree-freetype  Enable Tree FreeType],
    MOZ_TREE_FREETYPE=1,
    MOZ_TREE_FREETYPE= )
if test -n "$MOZ_TREE_FREETYPE"; then
   if test -n "$_WIN32_MSVC"; then
      AC_ERROR("building with in-tree freetype is not supported on MSVC")
   fi
   AC_DEFINE(MOZ_TREE_FREETYPE)
   AC_SUBST(MOZ_TREE_FREETYPE)
   MOZ_ENABLE_CAIRO_FT=1       
   FT_FONT_FEATURE="#define CAIRO_HAS_FT_FONT 1"
   FT2_CFLAGS='-I$(topsrcdir)/modules/freetype2/include'
   CAIRO_FT_CFLAGS='-I$(topsrcdir)/modules/freetype2/include'
   FT2_LIBS='$(call EXPAND_LIBNAME_PATH,freetype,$(DEPTH)/modules/freetype2/.libs)'
   CAIRO_FT_LIBS='$(call EXPAND_LIBNAME_PATH,freetype,$(DEPTH)/modules/freetype2/.libs)'
   AC_DEFINE(HAVE_FT_BITMAP_SIZE_Y_PPEM)
   AC_DEFINE(HAVE_FT_GLYPHSLOT_EMBOLDEN)
   AC_DEFINE(HAVE_FT_LOAD_SFNT_TABLE)
   AC_SUBST(CAIRO_FT_CFLAGS)
fi

dnl ========================================================
dnl Installer
dnl ========================================================
case "$target_os" in
    aix*|solaris*|linux*|mingw*|os2*)
        MOZ_INSTALLER=1
        ;;
esac

MOZ_ARG_DISABLE_BOOL(installer,
[  --disable-installer     Disable building of installer],
    MOZ_INSTALLER=,
    MOZ_INSTALLER=1)
if test -n "$MOZ_INSTALLER" -a "$OS_ARCH" = "WINNT"; then
    # Disable installer for Windows builds that use the new toolkit if the
    # required major version and minimum minor version of Unicode NSIS isn't in
    # the path.
    REQ_NSIS_MAJOR_VER=2
    MIN_NSIS_MINOR_VER=33
    MOZ_PATH_PROGS(MAKENSISU, $MAKENSISU makensisu-2.46 makensisu makensis)
    if test -z "$MAKENSISU" -o "$MAKENSISU" = ":"; then
        AC_MSG_ERROR([To build the installer you must have the latest MozillaBuild or Unicode NSIS with a major version of $REQ_NSIS_MAJOR_VER and a minimum minor version of $MIN_NSIS_MINOR_VER in your path. To build without the installer reconfigure using --disable-installer.])
    fi
    changequote(,)
    MAKENSISU_VER=`"$MAKENSISU" -version 2>/dev/null | sed -e '/-Unicode/!s/.*//g' -e 's/^v\([0-9]\+\.[0-9]\+\)\-Unicode$/\1/g'`
    changequote([,])
    if test ! "$MAKENSISU_VER" = ""; then
        MAKENSISU_MAJOR_VER=`echo $MAKENSISU_VER | $AWK -F\. '{ print $1 }'`
        MAKENSISU_MINOR_VER=`echo $MAKENSISU_VER | $AWK -F\. '{ print $2 }'`
    fi
    AC_MSG_CHECKING([for Unicode NSIS with major version == $REQ_NSIS_MAJOR_VER and minor version >= $MIN_NSIS_MINOR_VER])
    if test "$MAKENSISU_VER" = "" ||
       test ! "$MAKENSISU_MAJOR_VER" = "$REQ_NSIS_MAJOR_VER" -o \
            ! "$MAKENSISU_MINOR_VER" -ge $MIN_NSIS_MINOR_VER; then
        AC_MSG_RESULT([no])
        AC_MSG_ERROR([To build the installer you must have the latest MozillaBuild or Unicode NSIS with a major version of $REQ_NSIS_MAJOR_VER and a minimum minor version of $MIN_NSIS_MINOR_VER in your path. To build without the installer reconfigure using --disable-installer.])
    fi
    AC_MSG_RESULT([yes])
fi

AC_SUBST(MOZ_INSTALLER)

AC_MSG_CHECKING([for tar archiver])
AC_CHECK_PROGS(TAR, gnutar gtar tar, "")
if test -z "$TAR"; then
    AC_MSG_ERROR([no tar archiver found in \$PATH])
fi
AC_MSG_RESULT([$TAR])
AC_SUBST(TAR)

AC_MSG_CHECKING([for wget])
AC_CHECK_PROGS(WGET, wget, "")
AC_MSG_RESULT([$WGET])
AC_SUBST(WGET)

dnl ========================================================
dnl Updater
dnl ========================================================

MOZ_ARG_DISABLE_BOOL(updater,
[  --disable-updater       Disable building of updater],
    MOZ_UPDATER=,
    MOZ_UPDATER=1 )

if test -n "$MOZ_UPDATER"; then
    AC_DEFINE(MOZ_UPDATER)
fi

# app update channel is 'default' when not supplied.
MOZ_ARG_ENABLE_STRING([update-channel],
[  --enable-update-channel=CHANNEL
                          Select application update channel (default=default)],
    MOZ_UPDATE_CHANNEL=`echo $enableval | tr A-Z a-z`)

if test -z "$MOZ_UPDATE_CHANNEL"; then
    MOZ_UPDATE_CHANNEL=default
fi
AC_DEFINE_UNQUOTED(MOZ_UPDATE_CHANNEL, $MOZ_UPDATE_CHANNEL)
AC_SUBST(MOZ_UPDATE_CHANNEL)

# tools/update-packaging is not checked out by default.
MOZ_ARG_ENABLE_BOOL(update-packaging,
[  --enable-update-packaging
                          Enable tools/update-packaging],
    MOZ_UPDATE_PACKAGING=1,
    MOZ_UPDATE_PACKAGING= )
AC_SUBST(MOZ_UPDATE_PACKAGING)

dnl ========================================================
dnl leaky
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(leaky,
[  --enable-leaky          Build leaky memory tool],
    MOZ_LEAKY=1,
    MOZ_LEAKY=)


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 parental controls (for Windows Vista)
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(parental-controls,
[  --disable-parental-controls
                          Do not build parental controls],
   MOZ_DISABLE_PARENTAL_CONTROLS=1,
   MOZ_DISABLE_PARENTAL_CONTROLS=)
if test -n "$MOZ_DISABLE_PARENTAL_CONTROLS"; then
    AC_DEFINE(MOZ_DISABLE_PARENTAL_CONTROLS)
fi

AC_SUBST(MOZ_DISABLE_PARENTAL_CONTROLS)

dnl ========================================================
dnl = Disable DOMCrypto
dnl ========================================================
if test -n "$MOZ_DISABLE_DOMCRYPTO"; then
    AC_DEFINE(MOZ_DISABLE_DOMCRYPTO)
fi

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

dnl ========================================================
dnl = Disable feed handling components
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(feeds,
[  --disable-feeds         Disable feed handling and processing components],
    MOZ_FEEDS=,
    MOZ_FEEDS=1 )
if test -n "$MOZ_FEEDS"; then
    AC_DEFINE(MOZ_FEEDS)
else
    if test "$MOZ_BUILD_APP" = "browser"; then
        AC_MSG_ERROR([Cannot build Firefox with --disable-feeds.])
    fi
fi

dnl ========================================================
dnl Check for sqlite
dnl ========================================================

MOZ_NATIVE_SQLITE=
MOZ_ARG_ENABLE_BOOL(system-sqlite,
[  --enable-system-sqlite  Use system sqlite (located with pkgconfig)],
MOZ_NATIVE_SQLITE=1,
MOZ_NATIVE_SQLITE= )

if test -z "$MOZ_NATIVE_SQLITE"
then
    SQLITE_CFLAGS=
    SQLITE_LIBS='$(call EXPAND_LIBNAME_PATH,mozsqlite3,$(DIST)/lib)'
else
    dnl ============================
    dnl === SQLite Version check ===
    dnl ============================
    dnl Check to see if the system SQLite package is new enough.
    PKG_CHECK_MODULES(SQLITE, sqlite3 >= $SQLITE_VERSION)

    dnl ==================================
    dnl === SQLITE_SECURE_DELETE check ===
    dnl ==================================
    dnl Check to see if the system SQLite package is compiled with
    dnl SQLITE_SECURE_DELETE enabled.
    AC_MSG_CHECKING(for SQLITE_SECURE_DELETE support in system SQLite)
    _SAVE_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS $SQLITE_CFLAGS"
    _SAVE_LIBS="$LIBS"
    LIBS="$LIBS $SQLITE_LIBS"
    AC_CACHE_VAL(ac_cv_sqlite_secure_delete,[
        AC_TRY_RUN([
            #include "sqlite3.h"

            int main(int argc, char **argv){
              return !sqlite3_compileoption_used("SQLITE_SECURE_DELETE");
            }],
            ac_cv_sqlite_secure_delete=yes,
            ac_cv_sqlite_secure_delete=no,
            ac_cv_sqlite_secure_delete=no
        )
    ])
    AC_MSG_RESULT($ac_cv_sqlite_secure_delete)
    CFLAGS="$_SAVE_CFLAGS"
    LIBS="$_SAVE_LIBS"
    if test "x$ac_cv_sqlite_secure_delete" = "xno"; then
        AC_MSG_ERROR([System SQLite library is not compiled with SQLITE_SECURE_DELETE.])
    fi

    dnl ===============================
    dnl === SQLITE_THREADSAFE check ===
    dnl ===============================
    dnl Check to see if the system SQLite package is compiled with
    dnl SQLITE_THREADSAFE enabled.
    AC_MSG_CHECKING(for SQLITE_THREADSAFE support in system SQLite)
    _SAVE_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS $SQLITE_CFLAGS"
    _SAVE_LIBS="$LIBS"
    LIBS="$LIBS $SQLITE_LIBS"
    AC_CACHE_VAL(ac_cv_sqlite_threadsafe,[
        AC_TRY_RUN([
            #include "sqlite3.h"

            int main(int argc, char **argv){
              return !sqlite3_compileoption_used("SQLITE_THREADSAFE=1");
            }],
            ac_cv_sqlite_threadsafe=yes,
            ac_cv_sqlite_threadsafe=no,
            ac_cv_sqlite_threadsafe=no
        )
    ])
    AC_MSG_RESULT($ac_cv_sqlite_threadsafe)
    CFLAGS="$_SAVE_CFLAGS"
    LIBS="$_SAVE_LIBS"
    if test "x$ac_cv_sqlite_threadsafe" = "xno"; then
        AC_MSG_ERROR([System SQLite library is not compiled with SQLITE_THREADSAFE.])
    fi

    dnl ================================
    dnl === SQLITE_ENABLE_FTS3 check ===
    dnl ================================
    dnl check to see if the system SQLite package is compiled with
    dnl SQLITE_ENABLE_FTS3 enabled.
    AC_MSG_CHECKING(for SQLITE_ENABLE_FTS3 support in system SQLite)
    _SAVE_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS $SQLITE_CFLAGS"
    _SAVE_LIBS="$LIBS"
    LIBS="$LIBS $SQLITE_LIBS"
    AC_CACHE_VAL(ac_cv_sqlite_enable_fts3,[
        AC_TRY_RUN([
            #include "sqlite3.h"

            int main(int argc, char **argv){
              return !sqlite3_compileoption_used("SQLITE_ENABLE_FTS3");
            }],
            ac_cv_sqlite_enable_fts3=yes,
            ac_cv_sqlite_enable_fts3=no,
            ac_cv_sqlite_enable_fts3=no
        )
    ])
    AC_MSG_RESULT($ac_cv_sqlite_enable_fts3)
    CFLAGS="$_SAVE_CFLAGS"
    LIBS="$_SAVE_LIBS"
    if test "x$ac_cv_sqlite_enable_fts3" = "xno"; then
        AC_MSG_ERROR([System SQLite library is not compiled with SQLITE_ENABLE_FTS3.])
    fi

    dnl =========================================
    dnl === SQLITE_ENABLE_UNLOCK_NOTIFY check ===
    dnl =========================================
    dnl check to see if the system SQLite package is compiled with
    dnl SQLITE_ENABLE_UNLOCK_NOTIFY enabled.
    AC_MSG_CHECKING(for SQLITE_ENABLE_UNLOCK_NOTIFY support in system SQLite)
    _SAVE_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS $SQLITE_CFLAGS"
    _SAVE_LIBS="$LIBS"
    LIBS="$LIBS $SQLITE_LIBS"
    AC_CACHE_VAL(ac_cv_sqlite_enable_unlock_notify,[
        AC_TRY_RUN([
            #include "sqlite3.h"

            int main(int argc, char **argv){
              return !sqlite3_compileoption_used("SQLITE_ENABLE_UNLOCK_NOTIFY");
            }],
            ac_cv_sqlite_enable_unlock_notify=yes,
            ac_cv_sqlite_enable_unlock_notify=no,
            ac_cv_sqlite_enable_unlock_notify=no
        )
    ])
    AC_MSG_RESULT($ac_cv_sqlite_enable_unlock_notify)
    CFLAGS="$_SAVE_CFLAGS"
    LIBS="$_SAVE_LIBS"
    if test "x$ac_cv_sqlite_enable_unlock_notify" = "xno"; then
        AC_MSG_ERROR([System SQLite library is not compiled with SQLITE_ENABLE_UNLOCK_NOTIFY.])
    fi
fi

if test -n "$MOZ_NATIVE_SQLITE"; then
    AC_DEFINE(MOZ_NATIVE_SQLITE)
fi
AC_SUBST(MOZ_NATIVE_SQLITE)

dnl ========================================================
dnl = Enable help viewer (off by default)
dnl ========================================================
if test -n "$MOZ_HELP_VIEWER"; then
     dnl Do this if defined in confvars.sh
     AC_DEFINE(MOZ_HELP_VIEWER)
fi

dnl ========================================================
dnl = Enable safe browsing (anti-phishing)
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(safe-browsing,
[  --enable-safe-browsing  Enable safe browsing (anti-phishing) implementation],
    MOZ_SAFE_BROWSING=1,
    MOZ_SAFE_BROWSING= )
if test -n "$MOZ_SAFE_BROWSING"; then
    AC_DEFINE(MOZ_SAFE_BROWSING)
fi
AC_SUBST(MOZ_SAFE_BROWSING)

dnl ========================================================
dnl = Enable url-classifier
dnl ========================================================
dnl Implicitly enabled by default if building with safe-browsing
if test -n "$MOZ_SAFE_BROWSING"; then
    MOZ_URL_CLASSIFIER=1
fi
MOZ_ARG_ENABLE_BOOL(url-classifier,
[  --enable-url-classifier Enable url classifier module],
    MOZ_URL_CLASSIFIER=1,
    MOZ_URL_CLASSIFIER= )
if test -n "$MOZ_URL_CLASSIFIER"; then
    AC_DEFINE(MOZ_URL_CLASSIFIER)
fi
AC_SUBST(MOZ_URL_CLASSIFIER)

dnl ========================================================
dnl = Disable zipwriter
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(zipwriter,
[  --disable-zipwriter     Disable zipwriter component],
    MOZ_ZIPWRITER=,
    MOZ_ZIPWRITER=1 )
AC_SUBST(MOZ_ZIPWRITER)

dnl ========================================================
dnl = libconic
dnl ========================================================
dnl superseded by QtNetwork starting from 4.7
MOZ_ENABLE_LIBCONIC=1

if test -n "$MOZ_ENABLE_QT"; then
  if test "$MOZ_ENABLE_QTNETWORK"; then
    MOZ_ENABLE_LIBCONIC=
  fi
fi

MOZ_ARG_DISABLE_BOOL(libconic,
[  --disable-libconic      Disable libconic],
    MOZ_ENABLE_LIBCONIC=,
    MOZ_ENABLE_LIBCONIC=1 )

if test -n "$MOZ_ENABLE_LIBCONIC"; then
    PKG_CHECK_MODULES(LIBCONIC, conic,
                      MOZ_ENABLE_LIBCONIC=1,
                      MOZ_ENABLE_LIBCONIC=)
fi
if test "$MOZ_ENABLE_LIBCONIC"; then
    AC_DEFINE(MOZ_ENABLE_LIBCONIC)
fi

AC_SUBST(MOZ_ENABLE_LIBCONIC)
AC_SUBST(LIBCONIC_CFLAGS)
AC_SUBST(LIBCONIC_LIBS)
 
dnl ========================================================
dnl = Maemo checks
dnl ========================================================

MAEMO_SDK_TARGET_VER=-1

MOZ_ARG_WITH_STRING(maemo-version,
[  --with-maemo-version=MAEMO_SDK_TARGET_VER
                          Maemo SDK Version],
  MAEMO_SDK_TARGET_VER=$withval)

case "$MAEMO_SDK_TARGET_VER" in
5)
    MOZ_PLATFORM_MAEMO=5
    ;;

6)
    MOZ_PLATFORM_MAEMO=6
    ;;

-1)
    dnl We aren't compiling for Maemo, move on.
    ;;
*)
    AC_MSG_ERROR([Unknown Maemo Version.  Try setting --with-maemo-version to 5 or 6.])
    ;;
esac

if test $MOZ_PLATFORM_MAEMO; then
   AC_DEFINE_UNQUOTED([MOZ_PLATFORM_MAEMO], $MOZ_PLATFORM_MAEMO)

   if test -z "$MOZ_ENABLE_DBUS"; then
       AC_MSG_ERROR([DBus is required when building for Maemo])
   fi

   MOZ_GFX_OPTIMIZE_MOBILE=1
   MOZ_WEBGL_GLX=
   MOZ_MAEMO_LIBLOCATION=

   if test $MOZ_PLATFORM_MAEMO = 5; then
      dnl if we have Xcomposite we should also have Xdamage and Xfixes
      MOZ_CHECK_HEADERS([X11/extensions/Xdamage.h], [],
          [AC_MSG_ERROR([Couldn't find X11/extensions/Xdamage.h which is required for composited plugins.])])
      AC_CHECK_LIB(Xcomposite, XCompositeRedirectWindow, [XCOMPOSITE_LIBS="-lXcomposite -lXdamage -lXfixes"],
                   [MISSING_X="$MISSING_X -lXcomposite"], $XLIBS)

      AC_SUBST(XCOMPOSITE_LIBS)

      PKG_CHECK_MODULES(LIBHILDONMIME,libhildonmime, _LIB_FOUND=1, _LIB_FOUND=)
      MOZ_PLATFORM_MAEMO_LIBS="$MOZ_PLATFORM_MAEMO_LIBS $LIBHILDONMIME_LIBS"
      MOZ_PLATFORM_MAEMO_CFLAGS="$MOZ_PLATFORM_MAEMO_CFLAGS $LIBHILDONMIME_CFLAGS"
      if test -z "$_LIB_FOUND"; then
         AC_MSG_ERROR([Hildon Mime is required when building for Maemo])
      fi


      PKG_CHECK_MODULES(LIBOSSO,libosso, _LIB_FOUND=1, _LIB_FOUND=)
      MOZ_PLATFORM_MAEMO_LIBS="$MOZ_PLATFORM_MAEMO_LIBS $LIBOSSO_LIBS"
      MOZ_PLATFORM_MAEMO_CFLAGS="$MOZ_PLATFORM_MAEMO_CFLAGS $LIBOSSO_CFLAGS"
      if test -z "$_LIB_FOUND"; then
         AC_MSG_ERROR([LibOSSO is required when building for Maemo])
      fi

      PKG_CHECK_MODULES(LIBHILDONFM,hildon-fm-2, _LIB_FOUND=1, _LIB_FOUND=)
      MOZ_PLATFORM_MAEMO_LIBS="$MOZ_PLATFORM_MAEMO_LIBS $LIBHILDONFM_LIBS"
      MOZ_PLATFORM_MAEMO_CFLAGS="$MOZ_PLATFORM_MAEMO_CFLAGS $LIBHILDONFM_CFLAGS"
      if test -z "$_LIB_FOUND"; then
         AC_MSG_ERROR([Hildon FM-2 is required when building for Maemo])
      fi

   fi
   if test $MOZ_PLATFORM_MAEMO = 6; then
      dnl ========================================================
      dnl = Enable meego libcontentaction
      dnl ========================================================
      MOZ_ARG_ENABLE_BOOL(meegocontentaction,
      [  --enable-meegocontentaction           Enable meegocontentaction support],
         MOZ_MEEGOCONTENTACTION=1,
         MOZ_MEEGOCONTENTACTION=)

      if test -n "$MOZ_MEEGOCONTENTACTION"; then

         PKG_CHECK_MODULES(LIBCONTENTACTION, contentaction-0.1, _LIB_FOUND=1, _LIB_FOUND=)
         if test "$_LIB_FOUND"; then
            MOZ_PLATFORM_MAEMO_LIBS="$MOZ_PLATFORM_MAEMO_LIBS $LIBCONTENTACTION_LIBS"
            MOZ_PLATFORM_MAEMO_CFLAGS="$MOZ_PLATFORM_MAEMO_CFLAGS $LIBCONTENTACTION_CFLAGS"
            MOZ_ENABLE_CONTENTACTION=1
            AC_DEFINE(MOZ_ENABLE_CONTENTACTION)
            AC_SUBST(MOZ_ENABLE_CONTENTACTION)
         fi
      fi

      MOZ_ARG_ENABLE_BOOL(meegotouch,
      [  --enable-meegotouch  Enable meegotouch support],
         MOZ_MEEGOTOUCHENABLED=1,
         MOZ_MEEGOTOUCHENABLED=)

      if test -n "$MOZ_MEEGOTOUCHENABLED"; then
          PKG_CHECK_MODULES(MOZ_MEEGOTOUCH, meegotouchcore, _LIB_FOUND=1, _LIB_FOUND=)
          if test "$_LIB_FOUND"; then
              MOZ_QT_CFLAGS="$MOZ_MEEGOTOUCH_CFLAGS $MOZ_QT_CFLAGS"
              MOZ_QT_LIBS="$MOZ_MEEGOTOUCH_LIBS $MOZ_QT_LIBS"
              AC_DEFINE(MOZ_ENABLE_MEEGOTOUCH)
          else
              AC_MSG_WARN([Cannot meegotouchcore-dev. Disabling Meegotouch support.])
          fi
      fi
   fi

   PKG_CHECK_MODULES(LIBLOCATION,liblocation, _LIB_FOUND=1, _LIB_FOUND=)
   MOZ_PLATFORM_MAEMO_LIBS="$MOZ_PLATFORM_MAEMO_LIBS $LIBLOCATION_LIBS"
   MOZ_PLATFORM_MAEMO_CFLAGS="$MOZ_PLATFORM_MAEMO_CFLAGS $LIBLOCATION_CFLAGS"
   if test "$_LIB_FOUND"; then
      MOZ_MAEMO_LIBLOCATION=1
      AC_DEFINE(MOZ_MAEMO_LIBLOCATION)
   else
      AC_MSG_WARN([Cannot liblocation-dev. Disabling Maemo geolocation.])
   fi
   AC_SUBST(MOZ_MAEMO_LIBLOCATION)

   PKG_CHECK_MODULES(LIBMEEGOTOUCHSHARE, ShareUiInterface-maemo-meegotouch >= 0.3.31 mdatauri, _LIB_FOUND=1, _LIB_FOUND=)
   MOZ_PLATFORM_MAEMO_LIBS="$MOZ_PLATFORM_MAEMO_LIBS $LIBMEEGOTOUCHSHARE_LIBS"
   MOZ_PLATFORM_MAEMO_CFLAGS="$MOZ_PLATFORM_MAEMO_CFLAGS $LIBMEEGOTOUCHSHARE_CFLAGS"
   if test "$_LIB_FOUND"; then
      MOZ_ENABLE_MEEGOTOUCHSHARE=1
      AC_DEFINE(MOZ_ENABLE_MEEGOTOUCHSHARE)
   else
      AC_MSG_WARN([Cannot find maemo-meegotouch-interfaces-dev or libmdatauri-dev. Disabling meegotouch share ui.])
   fi
   AC_SUBST(MOZ_ENABLE_MEEGOTOUCHSHARE)

   AC_SUBST(MOZ_PLATFORM_MAEMO_LIBS)
   AC_SUBST(MOZ_PLATFORM_MAEMO_CFLAGS)
fi

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-*)
    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 "$GNU_CC"; then
        AC_MSG_ERROR([--with-thumb is not supported on non-GNU toolchains])
    fi
    MOZ_THUMB=$withval)

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

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

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

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

MOZ_ARG_WITH_STRING(soft-float,
[  --with-soft-float[[=yes|no|toolchain-default]]
                           Use soft float library (-msoft-float)],
    if test -z "$GNU_CC"; then
        AC_MSG_ERROR([--with-soft-float is not supported on non-GNU toolchains])
    fi
    MOZ_SOFT_FLOAT=$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 = XRender Composite
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(egl-xrender-composite,
[  --enable-egl-xrender-composite   
                          Enable EGL xrender composite optimizations],
    MOZ_EGL_XRENDER_COMPOSITE=1)

if test -n "$MOZ_EGL_XRENDER_COMPOSITE"; then
    AC_DEFINE(MOZ_EGL_XRENDER_COMPOSITE)
fi

AC_SUBST(MOZ_EGL_XRENDER_COMPOSITE)

dnl ========================================================
dnl = faststripe theme
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(faststripe,
[  --enable-faststripe     Use faststripe theme],
    MOZ_THEME_FASTSTRIPE=1,
    MOZ_THEME_FASTSTRIPE= )
AC_SUBST(MOZ_THEME_FASTSTRIPE)

dnl ========================================================
dnl =
dnl = Feature options that require extra sources to be pulled
dnl =
dnl ========================================================
dnl MOZ_ARG_HEADER(Features that require extra sources)

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 mobile optimizations
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(mobile-optimize,
[  --enable-mobile-optimize
                          Enable mobile optimizations],
    MOZ_GFX_OPTIMIZE_MOBILE=1)

AC_SUBST(MOZ_GFX_OPTIMIZE_MOBILE)

if test "$MOZ_GFX_OPTIMIZE_MOBILE"; then
    AC_DEFINE(MOZ_GFX_OPTIMIZE_MOBILE)
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 = Identical Code Folding
dnl ========================================================

MOZ_ARG_DISABLE_BOOL(icf,
[  --disable-icf          Disable Identical Code Folding],
    MOZ_DISABLE_ICF=1,
    MOZ_DISABLE_ICF= )

if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -z "$MOZ_DISABLE_ICF"; then
    AC_CACHE_CHECK([whether the linker supports Identical Code Folding],
        LD_SUPPORTS_ICF,
        [echo 'int foo() {return 42;}' \
              'int bar() {return 42;}' \
              'int main() {return foo() - bar();}' > conftest.${ac_ext}
        # If the linker supports ICF, foo and bar symbols will have
        # the same address
        if AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS -Wl,--icf=safe -ffunction-sections conftest.${ac_ext} $LIBS 1>&2]) &&
           test -s conftest${ac_exeext} &&
           objdump -t conftest${ac_exeext} | awk '{a[[$6]] = $1} END {if (a[["foo"]] && (a[["foo"]] != a[["bar"]])) { exit 1 }}'; then
            LD_SUPPORTS_ICF=yes
        else
            LD_SUPPORTS_ICF=no
        fi
        rm -rf conftest*])
    if test "$LD_SUPPORTS_ICF" = yes; then
        LDFLAGS="$LDFLAGS -Wl,--icf=safe"
        CFLAGS="$CFLAGS -ffunction-sections"
        CXXFLAGS="$CXXFLAGS -ffunction-sections"
    fi
fi

dnl ========================================================
dnl = Automatically remove dead symbols
dnl ========================================================

if test "$GNU_CC" -a "$GCC_USE_GNU_LD" -a -n "$MOZ_DEBUG_FLAGS"; then
   dnl See bug 670659
   AC_CACHE_CHECK([whether removing dead symbols breaks debugging],
       GC_SECTIONS_BREAKS_DEBUG_RANGES,
       [echo 'int foo() {return 42;}' \
             'int bar() {return 1;}' \
             'int main() {return foo();}' > conftest.${ac_ext}
        if AC_TRY_COMMAND([${CC-cc} -o conftest.${ac_objext} $CFLAGS $MOZ_DEBUG_FLAGS -ffunction-sections -c conftest.${ac_ext} 1>&2]) &&
           AC_TRY_COMMAND([${CC-cc} -o conftest${ac_exeext} $LDFLAGS $MOZ_DEBUG_FLAGS -Wl,--gc-sections conftest.${ac_objext} $LIBS 1>&2]) &&
           test -s conftest${ac_exeext} -a -s conftest.${ac_objext}; then
            if test "`$PYTHON "$_topsrcdir"/build/unix/check_debug_ranges.py conftest.${ac_objext} conftest.${ac_ext}`" = \
                    "`$PYTHON "$_topsrcdir"/build/unix/check_debug_ranges.py conftest${ac_exeext} conftest.${ac_ext}`"; then
                GC_SECTIONS_BREAKS_DEBUG_RANGES=no
            else
                GC_SECTIONS_BREAKS_DEBUG_RANGES=yes
            fi
        else
             dnl We really don't expect to get here, but just in case
             AC_ERROR([couldn't compile a simple C file])
        fi
        rm -rf conftest*])
    if test "$GC_SECTIONS_BREAKS_DEBUG_RANGES" = no; then
        DSO_LDOPTS="$DSO_LDOPTS -Wl,--gc-sections"
        case "$CFLAGS" in
        *-ffunction-sections*)
            CFLAGS="$CFLAGS -fdata-sections"
            CXXFLAGS="$CXXFLAGS -fdata-sections"
            ;;
        *)
            CFLAGS="$CFLAGS -ffunction-sections -fdata-sections"
            CXXFLAGS="$CXXFLAGS -ffunction-sections -fdata-sections"
            ;;
        esac
    fi
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 = Disable runtime logging checks
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(logging,
[  --disable-logging       Disable logging facilities],
    NS_DISABLE_LOGGING=1,
    NS_DISABLE_LOGGING= )
if test "$NS_DISABLE_LOGGING"; then
    AC_DEFINE(NS_DISABLE_LOGGING)
else
    AC_DEFINE(MOZ_LOGGING)
fi

dnl ========================================================
dnl = This will enable logging of addref, release, ctor, dtor.
dnl ========================================================
_ENABLE_LOGREFCNT=42
MOZ_ARG_ENABLE_BOOL(logrefcnt,
[  --enable-logrefcnt      Enable logging of refcounts (default=debug) ],
    _ENABLE_LOGREFCNT=1,
    _ENABLE_LOGREFCNT= )
if test "$_ENABLE_LOGREFCNT" = "1"; then
    AC_DEFINE(FORCE_BUILD_REFCNT_LOGGING)
elif test -z "$_ENABLE_LOGREFCNT"; then
    AC_DEFINE(NO_BUILD_REFCNT_LOGGING)
fi

dnl ========================================================
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=
  USE_ELF_DYNSTR_GC=
  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 -z "$MOZ_MEMORY"; then
  case "${target}" in
    *-mingw*)
      if test -z "$WIN32_REDIST_DIR" -a -z "$MOZ_DEBUG"; then
        AC_MSG_WARN([When not building jemalloc, you need to set WIN32_REDIST_DIR to the path to the Visual C++ Redist (usually VCINSTALLDIR\redist\x86\Microsoft.VC80.CRT, for VC++ v8) if you intend to distribute your build.])
      fi
      ;;
  esac
else
  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)
    _WRAP_MALLOC=1
    export WRAP_MALLOC_LIB="-L$_objdir/dist/lib -lmozalloc -lmozutils"
    WRAP_MALLOC_CFLAGS="-Wl,--wrap=dlopen -Wl,--wrap=dlclose -Wl,--wrap=dlerror -Wl,--wrap=dlsym -Wl,--wrap=dladdr"
    ;;
  *-*linux*)
    AC_DEFINE(MOZ_MEMORY_LINUX)
    ;;
  *-netbsd*)
    AC_DEFINE(MOZ_MEMORY_BSD)
    ;;
  *-solaris*)
    AC_DEFINE(MOZ_MEMORY_SOLARIS)
    ;;
  *-mingw*)
    AC_DEFINE(MOZ_MEMORY_WINDOWS)
    AC_MSG_CHECKING([for VC2005/2008++ CRT source])
    if test "$CC_VERSION" == "14.00.50727.762" -o "$CC_VERSION" == "15.00.30729.01"; then
      if test -z "$WIN32_CRT_SRC_DIR" -a -n "$VCINSTALLDIR"; then
        WIN32_CRT_SRC_DIR="$VCINSTALLDIR\crt\src"
      fi
      if test -n "$WIN32_CRT_SRC_DIR" -a -d "$WIN32_CRT_SRC_DIR"; then
        AC_MSG_RESULT([yes])
        dnl cpu check
        case "${target_cpu}" in
        i*86)
          MOZ_CRT_CPU_ARCH=intel
          ;;
        x86_64)
          MOZ_CRT_CPU_ARCH=amd64
          ;;
        *)
          AC_MSG_ERROR([--enable-jemalloc not supported on ${target}])
          ;;
        esac
        AC_SUBST(MOZ_CRT_CPU_ARCH)
        WIN32_OLD_STYLE_JEMALLOC=1
        AC_DEFINE(WIN32_OLD_STYLE_JEMALLOC)
        WIN32_CRT_SRC_DIR=`cd "$WIN32_CRT_SRC_DIR" && pwd -W`
        _objdir_win=`pwd -W`
        WIN32_CUSTOM_CRT_DIR="$_objdir_win/memory/jemalloc/crtsrc/build/$MOZ_CRT_CPU_ARCH"
        MOZ_MEMORY_LDFLAGS="-MANIFEST:NO -LIBPATH:\"$WIN32_CUSTOM_CRT_DIR\" -NODEFAULTLIB:msvcrt -NODEFAULTLIB:msvcrtd -NODEFAULTLIB:msvcprt -NODEFAULTLIB:msvcprtd -DEFAULTLIB:mozcrt19 -DEFAULTLIB:mozcpp19"
      fi
    fi
    if test -z "$WIN32_OLD_STYLE_JEMALLOC"; then
      AC_MSG_RESULT([no])
      WIN32_NEW_STYLE_JEMALLOC=1
      AC_DEFINE(WIN32_NEW_STYLE_JEMALLOC)
      WIN32_CRT_SRC_DIR=
      if test -z "$MOZ_DEBUG"; then
        WIN32_CRT_LIBS="msvcrt.lib msvcprt.lib"
      else
        WIN32_CRT_LIBS="msvcrtd.lib msvcprtd.lib"
      fi
      dnl Look for a broken crtdll.obj
      WIN32_CRTDLL_FULLPATH=`lib -nologo -list $WIN32_CRT_LIBS | grep crtdll\\.obj`
      lib -NOLOGO -OUT:crtdll.obj $WIN32_CRT_LIBS -EXTRACT:$WIN32_CRTDLL_FULLPATH
      if grep -q '__imp__\{0,1\}free' crtdll.obj; then
        MOZ_MEMORY_LDFLAGS='-LIBPATH:$(DIST)/lib -NODEFAULTLIB:msvcrt -NODEFAULTLIB:msvcrtd -NODEFAULTLIB:msvcprt -NODEFAULTLIB:msvcprtd -DEFAULTLIB:mozcrt'
      else
        MOZ_MEMORY_LDFLAGS='$(DIST)/../memory/jemalloc/jemalloc.lib'
      fi
      rm crtdll.obj
    fi

    dnl Also pass this to NSPR/NSS
    DLLFLAGS="$DLLFLAGS $MOZ_MEMORY_LDFLAGS"
    export DLLFLAGS
    ;;
  *)
    AC_MSG_ERROR([--enable-jemalloc not supported on ${target}])
    ;;
  esac

  if test "$OS_ARCH" != "WINNT"; then
    dnl NB: this must be kept in sync with jemalloc.h
    AC_DEFINE(HAVE_JEMALLOC_VALLOC)
  fi
  AC_DEFINE(HAVE_JEMALLOC_POSIX_MEMALIGN)
  AC_DEFINE(HAVE_JEMALLOC_MEMALIGN)
fi # MOZ_MEMORY
AC_SUBST(MOZ_MEMORY)
AC_SUBST(MOZ_MEMORY_LDFLAGS)
AC_SUBST(WIN32_OLD_STYLE_JEMALLOC)
AC_SUBST(WIN32_CRT_LIBS)
AC_SUBST(WIN32_CRT_SRC_DIR)
dnl Need to set this for make because NSS doesn't have configure
AC_SUBST(DLLFLAGS)

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_MALLOC_CFLAGS="${LDFLAGS} ${WRAP_MALLOC_CFLAGS} -Wl,--wrap -Wl,malloc -Wl,--wrap -Wl,calloc -Wl,--wrap -Wl,valloc -Wl,--wrap -Wl,free -Wl,--wrap -Wl,realloc -Wl,--wrap -Wl,memalign -Wl,--wrap -Wl,__builtin_new -Wl,--wrap -Wl,__builtin_vec_new -Wl,--wrap -Wl,__builtin_delete -Wl,--wrap -Wl,__builtin_vec_delete -Wl,--wrap -Wl,PR_Free -Wl,--wrap -Wl,PR_Malloc -Wl,--wrap -Wl,PR_Calloc -Wl,--wrap -Wl,PR_Realloc -Wl,--wrap -Wl,strdup -Wl,--wrap -Wl,strndup -Wl,--wrap -Wl,posix_memalign"
    MKSHLIB="$MKSHLIB"' $(WRAP_MALLOC_CFLAGS) $(WRAP_MALLOC_LIB)'
    MKCSHLIB="$MKCSHLIB"' $(WRAP_MALLOC_CFLAGS) $(WRAP_MALLOC_LIB)'
    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_MALLOC_LIB=$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)
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 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)
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 Zealous JavaScript GC
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(gczeal,
[  --enable-gczeal         Enable zealous JavaScript 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 = --enable-elf-dynstr-gc
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(elf-dynstr-gc,
[  --enable-elf-dynstr-gc  Enable elf dynstr garbage collector (opt builds only)],
    USE_ELF_DYNSTR_GC=1,
    USE_ELF_DYNSTR_GC= )

dnl ========================================================
dnl = --disable-elf-hack
dnl ========================================================

USE_ELF_HACK=1
MOZ_ARG_DISABLE_BOOL(elf-hack,
[  --disable-elf-hack      Disable elf hacks],
    USE_ELF_HACK=,
    USE_ELF_HACK=1)

# Only enable elfhack where supported
if test "$USE_ELF_HACK" = 1; then
    case "${HOST_OS_ARCH},${OS_ARCH}" in
    Linux,Linux)
        case "${CPU_ARCH}" in
        arm | x86 | x86_64)
            USE_ELF_HACK=1
            ;;
        *)
            USE_ELF_HACK=
            ;;
        esac
        ;;
    *)
        USE_ELF_HACK=
        ;;
    esac
fi

if test "$USE_ELF_HACK" = 1; then
    dnl PT_GNU_RELRO segment makes the dynamic linker set a read-only flag on
    dnl memory addresses it maps to. The result is that by the time elfhack
    dnl kicks in, it is not possible to apply relocations because of that,
    dnl thus elfhack effectively skips relocations inside the PT_GNU_RELRO
    dnl segment. It makes elfhack mostly useless, so considering the problems
    dnl we have we PT_GNU_RELRO (e.g. bug 664366), and until elfhack can deal
    dnl with PT_GNU_RELRO segments, it's just simpler to disable elfhack when
    dnl the linker creates PT_GNU_RELRO segments.
    AC_CACHE_CHECK([whether linker creates PT_GNU_RELRO segments],
        LINK_WITH_PT_GNU_RELRO,
        [echo "int main() {return 0;}" > conftest.${ac_ext}
         if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS conftest.${ac_ext} $LIBS 1>&2) &&
            test -s conftest${ac_exeext}; then
            if readelf -l conftest${ac_exeext} | grep GNU_RELRO > /dev/null; then
                LINK_WITH_PT_GNU_RELRO=yes
            else
                LINK_WITH_PT_GNU_RELRO=no
            fi
         else
             dnl We really don't expect to get here, but just in case
             AC_ERROR([couldn't compile a simple C file])
         fi
         rm -rf conftest*])
    if test "$LINK_WITH_PT_GNU_RELRO" = yes; then
        AC_MSG_WARN([Disabling elfhack])
        USE_ELF_HACK=
    fi
fi

dnl ========================================================
dnl = libstdc++ compatibility hacks
dnl ========================================================

STDCXX_COMPAT=
MOZ_ARG_ENABLE_BOOL(stdcxx-compat,
[  --enable-stdcxx-compat  Enable compatibility with older libstdc++],
    STDCXX_COMPAT=stdc++compat.cpp)

AC_SUBST(STDCXX_COMPAT)

if test -n "$STDCXX_COMPAT"; then
   eval $(CXX="$CXX" $PYTHON $_topsrcdir/build/autoconf/libstdcxx.py)
   AC_SUBST(MOZ_LIBSTDCXX_TARGET_VERSION)
   AC_SUBST(MOZ_LIBSTDCXX_HOST_VERSION)
fi

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

dnl ========================================================
dnl = Enable NS_FUNCTION_TIMER, which provides Function 
dnl = timing for identifying code bottlenecks 
dnl = NS_FUNCTION_TIMER is off by default.
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(functiontimer,
[  --enable-functiontimer  Enable NS_FUNCTION_TIMER ],
    NS_FUNCTION_TIMER=1,
    NS_FUNCTION_TIMER= )
if test -n "$NS_FUNCTION_TIMER"; then
    AC_DEFINE(NS_FUNCTION_TIMER)
fi

dnl ========================================================
dnl Turn on reflow counting
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(reflow-perf,
[  --enable-reflow-perf    Enable reflow performance tracing],
    MOZ_REFLOW_PERF=1,
    MOZ_REFLOW_PERF= )
if test -n "$MOZ_REFLOW_PERF"; then
    AC_DEFINE(MOZ_REFLOW_PERF)
fi

dnl ========================================================
dnl Enable code size metrics.
dnl ========================================================
MOZ_ARG_ENABLE_BOOL(codesighs,
[  --enable-codesighs      Enable code size analysis tools],
    _ENABLE_CODESIGHS=1,
    _ENABLE_CODESIGHS= )
if test -n "$_ENABLE_CODESIGHS"; then
    if test -d $srcdir/tools/codesighs; then 
        MOZ_MAPINFO=1
    else
        AC_MSG_ERROR([Codesighs directory $srcdir/tools/codesighs required.])
    fi
fi

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
    MOZ_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= )

dnl =========================================================
dnl = Chrome format
dnl =========================================================
MOZ_ARG_ENABLE_STRING([chrome-format],
[  --enable-chrome-format=jar|flat|both|symlink|omni
                          Select FORMAT of chrome files (default=jar)],
    MOZ_CHROME_FILE_FORMAT=`echo $enableval | tr A-Z a-z`)

if test -z "$MOZ_CHROME_FILE_FORMAT"; then
    MOZ_CHROME_FILE_FORMAT=jar
fi

if test "$MOZ_CHROME_FILE_FORMAT" != "jar" && 
    test "$MOZ_CHROME_FILE_FORMAT" != "flat" &&
    test "$MOZ_CHROME_FILE_FORMAT" != "symlink" &&
    test "$MOZ_CHROME_FILE_FORMAT" != "both" &&
    test "$MOZ_CHROME_FILE_FORMAT" != "omni"; then
    AC_MSG_ERROR([--enable-chrome-format must be set to either jar, flat, both, symlink, or omni])
fi

dnl =========================================================
dnl Omnijar packaging (bug 552121)
dnl =========================================================
dnl Omnijar packaging is compatible with flat packaging.
dnl In unpackaged builds, omnijar looks for files as if
dnl things were flat packaged. After packaging, all files
dnl are loaded from a single jar. MOZ_CHROME_FILE_FORMAT
dnl is set to flat since putting files into jars is only
dnl done during packaging with omnijar.
if test "$MOZ_CHROME_FILE_FORMAT" = "omni"; then
    MOZ_OMNIJAR=1
    AC_DEFINE(MOZ_OMNIJAR)
    if test "$OS_ARCH" = "WINNT" -o "$OS_ARCH" = "OS2" -o "$OS_TARGET" = "Android"; then
        MOZ_CHROME_FILE_FORMAT=flat
    else
        MOZ_CHROME_FILE_FORMAT=symlink
    fi
elif test "$MOZ_CHROME_FILE_FORMAT" = "jar"; then
    AC_DEFINE(MOZ_CHROME_FILE_FORMAT_JAR)
fi

AC_SUBST(MOZ_OMNIJAR)

dnl ========================================================
dnl = Define default location for MOZILLA_FIVE_HOME
dnl ========================================================
MOZ_ARG_WITH_STRING(default-mozilla-five-home,
[  --with-default-mozilla-five-home
                          Set the default value for MOZILLA_FIVE_HOME],
[ val=`echo $withval`
  AC_DEFINE_UNQUOTED(MOZ_DEFAULT_MOZILLA_FIVE_HOME,"$val") ])

dnl ========================================================
dnl = Location of the mozilla user directory (default is ~/.mozilla).],
dnl ========================================================
MOZ_ARG_WITH_STRING(user-appdir,
[  --with-user-appdir=DIR  Set user-specific appdir (default=.mozilla)],
[ val=`echo $withval`
if echo "$val" | grep "\/" >/dev/null; then
    AC_MSG_ERROR("Homedir must be single relative path.")
else 
    MOZ_USER_DIR="$val"
fi])

AC_DEFINE_UNQUOTED(MOZ_USER_DIR,"$MOZ_USER_DIR")

dnl ========================================================
dnl = Doxygen configuration
dnl ========================================================
dnl Use commas to specify multiple dirs to this arg
MOZ_DOC_INPUT_DIRS='./dist/include ./dist/idl'
MOZ_ARG_WITH_STRING(doc-input-dirs,
[  --with-doc-input-dirs=DIRS
                          Header/idl dirs to create docs from],
[ MOZ_DOC_INPUT_DIRS=`echo "$withval" | sed "s/,/ /g"` ] )
AC_SUBST(MOZ_DOC_INPUT_DIRS)

dnl Use commas to specify multiple dirs to this arg
MOZ_DOC_INCLUDE_DIRS='./dist/include ./dist/include/nspr'
MOZ_ARG_WITH_STRING(doc-include-dirs,
[  --with-doc-include-dirs=DIRS  
                          Include dirs to preprocess doc headers],
[ MOZ_DOC_INCLUDE_DIRS=`echo "$withval" | sed "s/,/ /g"` ] )
AC_SUBST(MOZ_DOC_INCLUDE_DIRS)

MOZ_DOC_OUTPUT_DIR='./dist/docs'
MOZ_ARG_WITH_STRING(doc-output-dir,
[  --with-doc-output-dir=DIR
                          Dir to generate docs into],
[ MOZ_DOC_OUTPUT_DIR=$withval ] )
AC_SUBST(MOZ_DOC_OUTPUT_DIR)

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 Test for correct temporary object destruction order
dnl ========================================================
dnl We want to make sure the compiler follows the C++ spec here as 
dnl xpcom and the string classes depend on it (bug 235381).
AC_MSG_CHECKING([for correct temporary object destruction order])
AC_TRY_RUN([ class A {
             public:  A(int& x) : mValue(x) {}
                      ~A() { mValue--; }
                      operator char**() { return 0; }
             private:  int& mValue;
             };
             void func(char **arg) {}
             int m=2;
             void test() {
                  func(A(m));
                  if (m==1) m = 0;
             }
             int main() {
                 test();
                 return(m);
             }
             ],
     result="yes", result="no", result="maybe")
AC_MSG_RESULT([$result])

if test "$result" = "no"; then
    AC_MSG_ERROR([Your compiler does not follow the C++ specification for temporary object destruction order.])
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
fi # ! SKIP_COMPILER_CHECKS

dnl ========================================================
dnl C++ exceptions (g++/VC/irix6/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)

# Irix & OSF native compilers do not like exception declarations 
# when exceptions are disabled
if test -n "$MIPSPRO_CXX" -o -n "$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_MOZILLA_CONFIG_H_ -DMOZILLA_CLIENT'
    _DEFINES_CXXFLAGS='$(ACDEFINES) -D_MOZILLA_CONFIG_H_ -DMOZILLA_CLIENT'
  else
    echo '#include <stdio.h>' > dummy-hello.c
    changequote(,)
    CL_INCLUDES_PREFIX=`"${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 =
dnl = Static Build Options
dnl =
dnl ========================================================
MOZ_ARG_HEADER(Static build options)

# split JS out by default to avoid VS2005 PGO crash (bug 591836).
if test "$OS_ARCH" = "WINNT" -a "$CPU_ARCH" != "x86_64" ; then
  ENABLE_SHARED_JS=1
fi

MOZ_ARG_ENABLE_BOOL(shared-js,
[  --enable-shared-js
                          Create a shared JavaScript library.],
    ENABLE_SHARED_JS=1,
    ENABLE_SHARED_JS=)

if test -n "$ENABLE_SHARED_JS"; then
  JS_SHARED_LIBRARY=1
  MOZ_JS_LIBS="$MOZ_JS_SHARED_LIBS"
else
  MOZ_JS_LIBS="$MOZ_JS_STATIC_LIBS"
  AC_DEFINE(MOZ_STATIC_JS)
fi
AC_SUBST(JS_SHARED_LIBRARY)

AC_SUBST(LIBXUL_LIBS)
XPCOM_LIBS="$LIBXUL_LIBS"

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

dnl Check for GLib and libIDL.
dnl ========================================================
SKIP_IDL_CHECK="no"

if test -z "$COMPILE_ENVIRONMENT"; then
    SKIP_IDL_CHECK="yes"
fi

dnl = Allow users to disable libIDL checking for standalone modules
MOZ_ARG_WITHOUT_BOOL(libIDL,
[  --without-libIDL        Skip check for libIDL (standalone modules only)],
	SKIP_IDL_CHECK="yes")

if test -z "$CROSS_COMPILE"; then
    if test -z "$HOST_LIBIDL_CONFIG"; then
        HOST_LIBIDL_CONFIG="$LIBIDL_CONFIG"
    fi
    if test -z "$HOST_LIBIDL_PREFIX"; then
        HOST_LIBIDL_PREFIX="$LIBIDL_PREFIX"
    fi
fi

if test "$SKIP_IDL_CHECK" = "no"
then
    _LIBIDL_FOUND=
    case "$host" in
    *-mingw*)
        if test -n "$GLIB_PREFIX"; then
            _GLIB_PREFIX_DIR=`cd $GLIB_PREFIX && pwd -W`
            if test "$?" = "0"; then
                if test `echo ${PATH}: | grep -ic "$_GLIB_PREFIX_DIR/bin:"` = 0; then
                    AC_MSG_ERROR([GLIB_PREFIX must be in your \$PATH.])
                fi
            else
                 AC_MSG_ERROR([GLIB_PREFIX is set but "${GLIB_PREFIX}" is not a directory.])
            fi
        else
            _GLIB_PREFIX_DIR=$MOZ_TOOLS_DIR
        fi
        if test ! -f "${_GLIB_PREFIX_DIR}/include/glib.h"; then
            AC_MSG_ERROR([Cannot find $_GLIB_PREFIX_DIR/include/glib.h .])
        fi
        GLIB_CFLAGS="-I${_GLIB_PREFIX_DIR}/include"
        if test -f "${_GLIB_PREFIX_DIR}/lib/glib-1.2_s.lib"; then
            GLIB_LIBS="${_GLIB_PREFIX_DIR}/lib/glib-1.2_s.lib"
        elif test -f "${_GLIB_PREFIX_DIR}/lib/glib-1.2.lib"; then
            GLIB_LIBS="${_GLIB_PREFIX_DIR}/lib/glib-1.2.lib"
        else
            AC_MSG_ERROR([Cannot find $_GLIB_PREFIX_DIR/lib/glib-1.2.lib or $_GLIB_PREFIX_DIR/lib/glib-1.2_s.lib])
        fi

        if test -n "$HOST_LIBIDL_PREFIX"; then
            _LIBIDL_PREFIX_DIR=`cd $HOST_LIBIDL_PREFIX && pwd -W`
            if test "$?" = "0"; then
                if test `echo ${PATH}: | grep -ic "$_LIBIDL_PREFIX_DIR/bin:"` = 0; then
                    AC_MSG_ERROR([LIBIDL_PREFIX must be in your \$PATH.])
                fi
            else
                AC_MSG_ERROR([LIBIDL_PREFIX is set but "${LIBIDL_PREFIX}" is not a directory.])
            fi
        else
            _LIBIDL_PREFIX_DIR=$MOZ_TOOLS_DIR
        fi        
        if test ! -f "${_LIBIDL_PREFIX_DIR}/include/libIDL/IDL.h"; then
            AC_MSG_ERROR([Cannot find $_LIBIDL_PREFIX_DIR/include/libIDL/IDL.h .])
        fi
        HOST_LIBIDL_CFLAGS="-I${_LIBIDL_PREFIX_DIR}/include ${GLIB_CFLAGS}"
        if test -f "${_LIBIDL_PREFIX_DIR}/lib/libidl-0.6_s.lib"; then
            HOST_LIBIDL_LIBS="${_LIBIDL_PREFIX_DIR}/lib/libidl-0.6_s.lib"
            STATIC_LIBIDL=1
        elif test -f "${_LIBIDL_PREFIX_DIR}/lib/libidl-0.6.lib"; then
            HOST_LIBIDL_LIBS="${_LIBIDL_PREFIX_DIR}/lib/libidl-0.6.lib"
        else
            AC_MSG_ERROR([Cannot find $_LIBIDL_PREFIX_DIR/lib/libidl-0.6.lib or $_LIBIDL_PREFIX_DIR/lib/libidl-0.6_s.lib])
        fi
        HOST_LIBIDL_LIBS="${HOST_LIBIDL_LIBS} ${GLIB_LIBS}"
        _LIBIDL_FOUND=1
        ;;
    esac

    if test -z "$_LIBIDL_FOUND"; then
        if test "$MACOS_SDK_DIR"; then 
            dnl xpidl, and therefore libIDL, is only needed on the build host.
            dnl Don't build it against the SDK, as that causes problems.
            _MACSAVE_CFLAGS="$CFLAGS"
            _MACSAVE_LIBS="$LIBS"
            _MACSAVE_LDFLAGS="$LDFLAGS"
            _MACSAVE_NEXT_ROOT="$NEXT_ROOT"
          changequote(,)
          CFLAGS=`echo $CFLAGS|sed -E -e "s%((-I|-isystem )${MACOS_SDK_DIR}/usr/(include|lib/gcc)[^ ]*)|-F${MACOS_SDK_DIR}(/System)?/Library/Frameworks[^ ]*|-nostdinc[^ ]*|-isysroot ${MACOS_SDK_DIR}%%g"`
          LIBS=`echo $LIBS|sed -e "s?-L${MACOS_SDK_DIR}/usr/lib[^ ]*??g"`
          LDFLAGS=`echo $LDFLAGS|sed -e "s?-Wl,-syslibroot,${MACOS_SDK_DIR}??g"`
          changequote([,])
          unset NEXT_ROOT
        fi

        PKG_CHECK_MODULES(HOST_LIBIDL, libIDL-2.0 >= 0.8.0 glib-2.0 gobject-2.0, _LIBIDL_FOUND=1,_LIBIDL_FOUND=)
    fi

    dnl if no gtk/libIDL1 or gtk2/libIDL2 combination was found, fall back
    dnl to either libIDL1 or libIDL2.
    if test -z "$_LIBIDL_FOUND"; then
        AM_PATH_LIBIDL($LIBIDL_VERSION,_LIBIDL_FOUND=1)
        if test -z "$_LIBIDL_FOUND"; then
            PKG_CHECK_MODULES(HOST_LIBIDL, libIDL-2.0 >= 0.8.0,_LIBIDL_FOUND=1)
        fi
    fi
    dnl
    dnl If we don't have a libIDL config program & not cross-compiling, 
    dnl     look for orbit-config instead.
    dnl
    if test -z "$_LIBIDL_FOUND" -a -z "$CROSS_COMPILE"; then
        MOZ_PATH_PROGS(ORBIT_CONFIG, $ORBIT_CONFIG orbit-config)
        if test -n "$ORBIT_CONFIG"; then
            AC_MSG_CHECKING([for ORBit libIDL usability])
        	_ORBIT_CFLAGS=`${ORBIT_CONFIG} client --cflags`
    	    _ORBIT_LIBS=`${ORBIT_CONFIG} client --libs`
            _ORBIT_INC_PATH=`${PERL} -e '{ for $f (@ARGV) { print "$f " if ($f =~ m/^-I/); } }' -- ${_ORBIT_CFLAGS}`
            _ORBIT_LIB_PATH=`${PERL} -e '{ for $f (@ARGV) { print "$f " if ($f =~ m/^-L/); } }' -- ${_ORBIT_LIBS}`
            HOST_LIBIDL_CFLAGS="$_ORBIT_INC_PATH"
            HOST_LIBIDL_LIBS="$_ORBIT_LIB_PATH -lIDL -lglib"
            HOST_LIBIDL_CONFIG=
            _SAVE_CFLAGS="$CFLAGS"
            _SAVE_LIBS="$LIBS"
            CFLAGS="$HOST_LIBIDL_CFLAGS $CFLAGS"
            LIBS="$HOST_LIBIDL_LIBS $LIBS"
            AC_TRY_RUN([
#include <stdlib.h>
#include <libIDL/IDL.h>
int main() {
  char *s;
  s=strdup(IDL_get_libver_string());
  if(s==NULL) {
    exit(1);
  }
  exit(0);
}
            ], [_LIBIDL_FOUND=1
                result="yes"],
               [HOST_LIBIDL_CFLAGS=
                HOST_LIBIDL_LIBS=
                result="no"],
               [_LIBIDL_FOUND=1
                result="maybe"] )
            AC_MSG_RESULT($result)
            CFLAGS="$_SAVE_CFLAGS"
            LIBS="$_SAVE_LIBS"
        fi
    fi
    if test -z "$_LIBIDL_FOUND"; then
        AC_MSG_ERROR([libIDL not found.
        libIDL $LIBIDL_VERSION or higher is required.])
    fi
    if test "$MACOS_SDK_DIR"; then
      CFLAGS="$_MACSAVE_CFLAGS"
      LIBS="$_MACSAVE_LIBS"
      LDFLAGS="$_MACSAVE_LDFLAGS"
      if test -n "$_MACSAVE_NEXT_ROOT" ; then
        export NEXT_ROOT="$_MACSAVE_NEXT_ROOT"
      fi
    fi
fi

if test -n "$CROSS_COMPILE"; then
    case "$target" in
    *-mingw*)
        if test -n "$GLIB_PREFIX"; then
            GLIB_CFLAGS="-I${GLIB_PREFIX}/include"
            if test -f "${GLIB_PREFIX}/lib/glib-1.2_s.lib"; then
                GLIB_LIBS="${GLIB_PREFIX}/lib/glib-1.2_s.lib"
            elif test -f "${GLIB_PREFIX}/lib/glib-1.2.lib"; then
                GLIB_LIBS="${GLIB_PREFIX}/lib/glib-1.2.lib"
            else
                AC_MSG_ERROR([Cannot find $GLIB_PREFIX/lib/glib-1.2.lib or $GLIB_PREFIX/lib/glib-1.2_s.lib])
            fi
        fi

        if test -n "$LIBIDL_PREFIX"; then
            LIBIDL_CFLAGS="-I${LIBIDL_PREFIX}/include ${GLIB_CFLAGS}"
            if test -f "${LIBIDL_PREFIX}/lib/libIDL-0.6_s.lib"; then
                LIBIDL_LIBS="${LIBIDL_PREFIX}/lib/libIDL-0.6_s.lib"
                STATIC_LIBIDL=1
            elif test -f "${LIBIDL_PREFIX}/lib/libIDL-0.6.lib"; then
                LIBIDL_LIBS="${LIBIDL_PREFIX}/lib/libIDL-0.6.lib"
            else
                AC_MSG_ERROR([Cannot find $LIBIDL_PREFIX/lib/libIDL-0.6.lib or $LIBIDL_PREFIX/lib/libIDL-0.6_s.lib])
            fi
        fi
        LIBIDL_LIBS="${LIBIDL_LIBS} ${GLIB_LIBS}"
        ;;
    *)
        if test -n "LIBIDL_CONFIG" -a "LIBIDL_CONFIG" != "no"; then
            LIBIDL_CFLAGS=`${LIBIDL_CONFIG} --cflags`
            LIBIDL_LIBS=`${LIBIDL_CONFIG} --libs`
        fi
        ;;
    esac
else
    LIBIDL_CFLAGS="$HOST_LIBIDL_CFLAGS"
    LIBIDL_LIBS="$HOST_LIBIDL_LIBS"
fi

if test -z "$SKIP_PATH_CHECKS"; then
if test -z "${GLIB_CFLAGS}" -o -z "${GLIB_LIBS}" ; then
    if test "$MOZ_ENABLE_GTK2" -o "$USE_ELF_DYNSTR_GC" ; then
        PKG_CHECK_MODULES(GLIB, glib-2.0 >= 1.3.7 gobject-2.0)
    else
        AM_PATH_GLIB(${GLIB_VERSION})
    fi
fi
fi

if test -z "${GLIB_GMODULE_LIBS}" \
   -a -n "${GLIB_CONFIG}"\
    -a "${GLIB_CONFIG}" != no\
; then
    GLIB_GMODULE_LIBS=`$GLIB_CONFIG gmodule --libs`
fi

AC_SUBST(LIBIDL_CFLAGS)
AC_SUBST(LIBIDL_LIBS)
AC_SUBST(STATIC_LIBIDL)
AC_SUBST(GLIB_CFLAGS)
AC_SUBST(GLIB_LIBS)
AC_SUBST(GLIB_GMODULE_LIBS)
AC_SUBST(HOST_LIBIDL_CONFIG)
AC_SUBST(HOST_LIBIDL_CFLAGS)
AC_SUBST(HOST_LIBIDL_LIBS)

dnl ========================================================
dnl Check for cairo
dnl ========================================================
MOZ_CAIRO_CFLAGS='-I$(LIBXUL_DIST)/include/cairo'

MOZ_TREE_CAIRO=1
MOZ_ARG_ENABLE_BOOL(system-cairo,
[  --enable-system-cairo   Use system cairo (located with pkgconfig)],
MOZ_TREE_CAIRO=,
MOZ_TREE_CAIRO=1 )

MOZ_TREE_PIXMAN=1
MOZ_ARG_ENABLE_BOOL(system-pixman,
[ --enable-system-pixman Use system pixman (located with pkgconfig)],
MOZ_TREE_PIXMAN=,
MOZ_TREE_PIXMAN=1 )

# Check for headers defining standard int types.
MOZ_CHECK_HEADERS(stdint.h inttypes.h sys/int_types.h)

if test "$MOZ_TREE_CAIRO"; then
    AC_DEFINE(MOZ_TREE_CAIRO)

    # For now we assume that we will have a uint64_t available through
    # one of the above headers or mozstdint.h.
    AC_DEFINE(HAVE_UINT64_T)

    # Define macros for cairo-features.h
    TEE_SURFACE_FEATURE="#define CAIRO_HAS_TEE_SURFACE 1"
    if test "$MOZ_X11"; then
        XLIB_SURFACE_FEATURE="#define CAIRO_HAS_XLIB_SURFACE 1"
        XLIB_XRENDER_SURFACE_FEATURE="#define CAIRO_HAS_XLIB_XRENDER_SURFACE 1"
        PS_SURFACE_FEATURE="#define CAIRO_HAS_PS_SURFACE 1"
        FT_FONT_FEATURE="#define CAIRO_HAS_FT_FONT 1"
        MOZ_ENABLE_CAIRO_FT=1
        CAIRO_FT_CFLAGS="$FT2_CFLAGS"
    fi
    case "$MOZ_WIDGET_TOOLKIT" in
      qt)
        QT_SURFACE_FEATURE="#define CAIRO_HAS_QT_SURFACE 1"
        ;;
      cocoa)
        QUARTZ_SURFACE_FEATURE="#define CAIRO_HAS_QUARTZ_SURFACE 1"
        QUARTZ_IMAGE_SURFACE_FEATURE="#define CAIRO_HAS_QUARTZ_IMAGE_SURFACE 1"
        QUARTZ_FONT_FEATURE="#define CAIRO_HAS_QUARTZ_FONT 1"
        ;;
      windows)
        WIN32_SURFACE_FEATURE="#define CAIRO_HAS_WIN32_SURFACE 1"
        WIN32_FONT_FEATURE="#define CAIRO_HAS_WIN32_FONT 1"
        if test "$MOZ_WINSDK_TARGETVER" -ge "06010000"; then
            WIN32_DWRITE_FONT_FEATURE="#define CAIRO_HAS_DWRITE_FONT 1"
            WIN32_D2D_SURFACE_FEATURE="#define CAIRO_HAS_D2D_SURFACE 1"
            MOZ_ENABLE_D2D_SURFACE=1
            MOZ_ENABLE_DWRITE_FONT=1
        else
            WIN32_DWRITE_FONT_FEATURE=
            WIN32_D2D_SURFACE_FEATURE=
        fi

        MOZ_CHECK_HEADER(d3d9.h, MOZ_ENABLE_D3D9_LAYER=1)

        dnl D3D10 Layers depend on D2D Surfaces.
        if test -n "$WIN32_D2D_SURFACE_FEATURE"; then
          MOZ_CHECK_HEADER(d3d10.h, MOZ_ENABLE_D3D10_LAYER=1)
        fi
        ;;
      os2)
        OS2_SURFACE_FEATURE="#define CAIRO_HAS_OS2_SURFACE 1"
        FT_FONT_FEATURE="#define CAIRO_HAS_FT_FONT 1"
        MOZ_ENABLE_CAIRO_FT=1
        CAIRO_FT_CFLAGS="-I${MZFTCFGFT2}/include"
        CAIRO_FT_LIBS="-L${MZFTCFGFT2}/lib -lmozft -lmzfntcfg"
        ;;
    esac
    if test "$USE_FC_FREETYPE"; then
        FC_FONT_FEATURE="#define CAIRO_HAS_FC_FONT 1"
    fi
    AC_SUBST(MOZ_ENABLE_CAIRO_FT)
    AC_SUBST(MOZ_ENABLE_DWRITE_FONT)
    AC_SUBST(MOZ_ENABLE_D2D_SURFACE)
    AC_SUBST(MOZ_ENABLE_D3D9_LAYER)
    AC_SUBST(MOZ_ENABLE_D3D10_LAYER)
    AC_SUBST(CAIRO_FT_CFLAGS)

    if test "$MOZ_DEBUG"; then
      SANITY_CHECKING_FEATURE="#define CAIRO_DO_SANITY_CHECKING 1"
    else
      SANITY_CHECKING_FEATURE="#undef CAIRO_DO_SANITY_CHECKING"
    fi

    PNG_FUNCTIONS_FEATURE="#define CAIRO_HAS_PNG_FUNCTIONS 1"

    AC_SUBST(PS_SURFACE_FEATURE)
    AC_SUBST(PDF_SURFACE_FEATURE)
    AC_SUBST(SVG_SURFACE_FEATURE)
    AC_SUBST(XLIB_SURFACE_FEATURE)
    AC_SUBST(XLIB_XRENDER_SURFACE_FEATURE)
    AC_SUBST(QUARTZ_SURFACE_FEATURE)
    AC_SUBST(QUARTZ_IMAGE_SURFACE_FEATURE)
    AC_SUBST(XCB_SURFACE_FEATURE)
    AC_SUBST(WIN32_SURFACE_FEATURE)
    AC_SUBST(OS2_SURFACE_FEATURE)
    AC_SUBST(DIRECTFB_SURFACE_FEATURE)
    AC_SUBST(FT_FONT_FEATURE)
    AC_SUBST(FC_FONT_FEATURE)
    AC_SUBST(WIN32_FONT_FEATURE)
    AC_SUBST(WIN32_DWRITE_FONT_FEATURE)
    AC_SUBST(WIN32_D2D_SURFACE_FEATURE)
    AC_SUBST(QUARTZ_FONT_FEATURE)
    AC_SUBST(PNG_FUNCTIONS_FEATURE)
    AC_SUBST(QT_SURFACE_FEATURE)
    AC_SUBST(TEE_SURFACE_FEATURE)

    MOZ_CAIRO_LIBS='$(call EXPAND_LIBNAME_PATH,mozcairo,$(DEPTH)/gfx/cairo/cairo/src)'" $CAIRO_FT_LIBS"

    if test "$MOZ_TREE_PIXMAN"; then
        AC_DEFINE(MOZ_TREE_PIXMAN)
        MOZ_CAIRO_LIBS="$MOZ_CAIRO_LIBS"' $(call EXPAND_LIBNAME_PATH,mozlibpixman,$(DEPTH)/gfx/cairo/libpixman/src)'
    else
        PKG_CHECK_MODULES(PIXMAN, pixman-1 >= 0.19.2)
        MOZ_CAIRO_CFLAGS="$MOZ_CAIRO_CFLAGS $PIXMAN_CFLAGS"
        MOZ_CAIRO_LIBS="$MOZ_CAIRO_LIBS $PIXMAN_LIBS"
    fi

    if test "$MOZ_X11"; then
        MOZ_CAIRO_LIBS="$MOZ_CAIRO_LIBS $XLDFLAGS -lXrender -lfreetype -lfontconfig"
    fi

    CAIRO_FEATURES_H=gfx/cairo/cairo/src/cairo-features.h
    mv -f $CAIRO_FEATURES_H "$CAIRO_FEATURES_H".orig 2> /dev/null

else
   PKG_CHECK_MODULES(CAIRO, cairo >= $CAIRO_VERSION pixman-1 freetype2 fontconfig)
   MOZ_CAIRO_CFLAGS=$CAIRO_CFLAGS
   MOZ_CAIRO_LIBS=$CAIRO_LIBS
   PKG_CHECK_MODULES(CAIRO_TEE, cairo-tee >= $CAIRO_VERSION)
   if test "$MOZ_X11"; then
        PKG_CHECK_MODULES(CAIRO_XRENDER, cairo-xlib-xrender >= $CAIRO_VERSION)
        MOZ_CAIRO_LIBS="$MOZ_CAIRO_LIBS $XLDFLAGS $CAIRO_XRENDER_LIBS"
        MOZ_CAIRO_CFLAGS="$MOZ_CAIRO_CFLAGS $CAIRO_XRENDER_CFLAGS"
   fi
fi

AC_SUBST(MOZ_TREE_CAIRO)
AC_SUBST(MOZ_CAIRO_CFLAGS)
AC_SUBST(MOZ_CAIRO_LIBS)
AC_SUBST(MOZ_TREE_PIXMAN)

dnl ========================================================
dnl qcms
dnl ========================================================

QCMS_LIBS='$(call EXPAND_LIBNAME_PATH,mozqcms,$(DEPTH)/gfx/qcms)'
AC_SUBST(QCMS_LIBS)

dnl ========================================================
dnl HarfBuzz
dnl ========================================================
MOZ_HARFBUZZ_LIBS='$(DEPTH)/gfx/harfbuzz/src/$(LIB_PREFIX)mozharfbuzz.$(LIB_SUFFIX)'
AC_SUBST(MOZ_HARFBUZZ_LIBS)

dnl ========================================================
dnl OTS
dnl ========================================================
MOZ_OTS_LIBS='$(DEPTH)/gfx/ots/src/$(LIB_PREFIX)mozots.$(LIB_SUFFIX)'
AC_SUBST(MOZ_OTS_LIBS)

dnl ========================================================
dnl disable xul
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(xul,
[  --disable-xul           Disable XUL],
    MOZ_XUL= )
if test "$MOZ_XUL"; then
  AC_DEFINE(MOZ_XUL)
else
  dnl remove extensions that require XUL
  MOZ_EXTENSIONS=`echo $MOZ_EXTENSIONS | sed -e 's/inspector//' -e 's/venkman//' -e 's/irc//' -e 's/tasks//'`
fi

AC_SUBST(MOZ_XUL)

dnl ========================================================
dnl disable profile locking
dnl   do no use this in applications that can have more than
dnl   one process accessing the profile directory.
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(profilelocking,
[  --disable-profilelocking
                          Disable profile locking],
    MOZ_PROFILELOCKING=,
    MOZ_PROFILELOCKING=1 )
if test "$MOZ_PROFILELOCKING"; then
  AC_DEFINE(MOZ_PROFILELOCKING)
fi

dnl ========================================================
dnl disable rdf services
dnl ========================================================
MOZ_ARG_DISABLE_BOOL(rdf,
[  --disable-rdf           Disable RDF],
    MOZ_RDF= )
if test "$MOZ_RDF"; then
  AC_DEFINE(MOZ_RDF)
fi

AC_SUBST(MOZ_RDF)

dnl ========================================================
dnl necko configuration options
dnl ========================================================

dnl
dnl option to disable various necko protocols
dnl
MOZ_ARG_ENABLE_STRING(necko-protocols,
[  --enable-necko-protocols[={http,ftp,default,all,none}]
                          Enable/disable specific protocol handlers],
[ for option in `echo $enableval | sed 's/,/ /g'`; do
    if test "$option" = "yes" -o "$option" = "all"; then
        NECKO_PROTOCOLS="$NECKO_PROTOCOLS $NECKO_PROTOCOLS_DEFAULT"
    elif test "$option" = "no" -o "$option" = "none"; then
        NECKO_PROTOCOLS=""
    elif test "$option" = "default"; then
        NECKO_PROTOCOLS="$NECKO_PROTOCOLS $NECKO_PROTOCOLS_DEFAULT"
    elif test `echo "$option" | grep -c \^-` != 0; then
        option=`echo $option | sed 's/^-//'`
        NECKO_PROTOCOLS=`echo "$NECKO_PROTOCOLS" | sed "s/ ${option}//"`
    else
        NECKO_PROTOCOLS="$NECKO_PROTOCOLS $option"
    fi
done],
    NECKO_PROTOCOLS="$NECKO_PROTOCOLS_DEFAULT")
dnl Remove dupes
NECKO_PROTOCOLS=`${PERL} ${srcdir}/build/unix/uniq.pl ${NECKO_PROTOCOLS}`
AC_SUBST(NECKO_PROTOCOLS)
for p in $NECKO_PROTOCOLS; do
    AC_DEFINE_UNQUOTED(NECKO_PROTOCOL_$p)
done

dnl
dnl option to disable necko's disk cache
dnl
MOZ_ARG_DISABLE_BOOL(necko-disk-cache,
[  --disable-necko-disk-cache
                          Disable necko disk cache],
    NECKO_DISK_CACHE=,
    NECKO_DISK_CACHE=1)
AC_SUBST(NECKO_DISK_CACHE)
if test "$NECKO_DISK_CACHE"; then
    AC_DEFINE(NECKO_DISK_CACHE)
fi

dnl
dnl option to disable necko's wifi scanner
dnl
MOZ_ARG_DISABLE_BOOL(necko-wifi,
[  --disable-necko-wifi    Disable necko wifi scanner],
    NECKO_WIFI=,
    NECKO_WIFI=1)

if test "$OS_ARCH" = "OS2"; then
  dnl OS/2 implementation of Necko-WiFi support will be added in bug 506566
  NECKO_WIFI=
fi
if test "$NECKO_WIFI" -a \
        "$OS_ARCH" != "Linux" -a \
        "$OS_ARCH" != "Darwin" -a \
        "$OS_ARCH" != "SunOS" -a \
        "$OS_ARCH" != "WINNT"; then
  AC_MSG_ERROR([Necko WiFi scanning not supported on your platform, use --disable-necko-wifi])
fi

if test -z "$SKIP_LIBRARY_CHECKS" -a "$NECKO_WIFI" -a "$OS_ARCH" = "Linux"
then
  MOZ_CHECK_HEADER([iwlib.h])
  if test "$ac_cv_header_iwlib_h" != "yes"; then
    AC_MSG_ERROR([Can't find header iwlib.h for Necko WiFi scanning (might be in package libiw-dev (Ubuntu) or wireless-tools-devel (Fedora) or libiw-devel (openSUSE)); use --disable-necko-wifi to disable])
  fi
fi

if test "$NECKO_WIFI"; then
  AC_DEFINE(NECKO_WIFI)
fi
AC_SUBST(NECKO_WIFI)

dnl
dnl option to disable cookies
dnl
MOZ_ARG_DISABLE_BOOL(cookies,
[  --disable-cookies       Disable cookie support],
    NECKO_COOKIES=,
    NECKO_COOKIES=1)
AC_SUBST(NECKO_COOKIES)
if test "$NECKO_COOKIES"; then
    AC_DEFINE(NECKO_COOKIES)
fi

dnl
dnl Build jsctypes on the platforms we can, unless it's explicitly disabled.
dnl
MOZ_ARG_DISABLE_BOOL(ctypes,
[  --disable-ctypes        Disable js-ctypes],
    BUILD_CTYPES=,
    BUILD_CTYPES=1)
AC_SUBST(BUILD_CTYPES)
if test "$BUILD_CTYPES"; then
    AC_DEFINE(BUILD_CTYPES)
fi

dnl NECKO_ configuration options are not global
_NON_GLOBAL_ACDEFINES="$_NON_GLOBAL_ACDEFINES NECKO_"

dnl Build Places if required
if test "$MOZ_PLACES"; then
  AC_DEFINE(MOZ_PLACES)
fi

dnl Build Sync Services if required
AC_SUBST(MOZ_SERVICES_SYNC)
if test -n "$MOZ_SERVICES_SYNC"; then
  AC_DEFINE(MOZ_SERVICES_SYNC)
fi

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

if test "$MOZ_APP_COMPONENT_INCLUDE"; then
  AC_DEFINE_UNQUOTED(MOZ_APP_COMPONENT_INCLUDE, "$MOZ_APP_COMPONENT_INCLUDE")
fi

if test "$MOZ_APP_COMPONENT_MODULES"; then
  AC_DEFINE_UNQUOTED(MOZ_APP_COMPONENT_MODULES, $MOZ_APP_COMPONENT_MODULES)
fi

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_WIDGET_TOOLKIT)
AC_SUBST(MOZ_UPDATE_XTERM)
AC_SUBST(MINIMO)
AC_SUBST(MOZ_PLATFORM_MAEMO)
AC_SUBST(MOZ_AUTH_EXTENSION)
AC_SUBST(MOZ_PERMISSIONS)
AC_SUBST(MOZ_XTF)
AC_SUBST(MOZ_PREF_EXTENSIONS)
AC_SUBST(MOZ_SMIL)
AC_SUBST(MOZ_XSLT_STANDALONE)
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_EXTENSIONS)
AC_SUBST(MOZ_JSDEBUGGER)
AC_SUBST(MOZ_LOG_REFCNT)
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(MOZ_PLACES)
AC_SUBST(MOZ_TOOLKIT_SEARCH)
AC_SUBST(MOZ_FEEDS)
AC_SUBST(NS_PRINTING)
AC_SUBST(MOZ_WEBGL)
AC_SUBST(MOZ_HELP_VIEWER)

AC_SUBST(JAVA)
AC_SUBST(JAVAC)
AC_SUBST(JAR)

AC_SUBST(MOZ_PROFILELOCKING)

AC_SUBST(ENABLE_TESTS)
AC_SUBST(IBMBIDI)
AC_SUBST(MOZ_UNIVERSALCHARDET)
AC_SUBST(ACCESSIBILITY)
AC_SUBST(MOZ_SPELLCHECK)
AC_SUBST(MOZ_USER_DIR)
AC_SUBST(MOZ_CRASHREPORTER)
AC_SUBST(MOZ_UPDATER)
AC_SUBST(MOZ_ANGLE)
AC_SUBST(MOZ_DIRECTX_SDK_PATH)
AC_SUBST(MOZ_DIRECTX_SDK_CPU_SUFFIX)
AC_SUBST(MOZ_D3DX9_VERSION)
AC_SUBST(MOZ_D3DX9_CAB)
AC_SUBST(MOZ_D3DCOMPILER_CAB)
AC_SUBST(MOZ_D3DX9_DLL)
AC_SUBST(MOZ_D3DCOMPILER_DLL)

AC_SUBST(ENABLE_STRIP)
AC_SUBST(PKG_SKIP_STRIP)
AC_SUBST(USE_ELF_DYNSTR_GC)
AC_SUBST(USE_ELF_HACK)
AC_SUBST(INCREMENTAL_LINKER)
AC_SUBST(MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS)
AC_SUBST(MOZ_JEMALLOC_STANDALONE_GLUE_LDOPTS)
AC_SUBST(MOZ_COMPONENT_NSPR_LIBS)

AC_SUBST(MOZ_FIX_LINK_PATHS)
AC_SUBST(XPCOM_LIBS)
AC_SUBST(XPCOM_FROZEN_LDOPTS)
AC_SUBST(XPCOM_GLUE_LDOPTS)
AC_SUBST(XPCOM_STANDALONE_GLUE_LDOPTS)

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)

# The following variables are available to branding and application
# configuration ($BRANDING/configure.sh and $APPLICATION/confvars.sh):
# - MOZ_APP_VENDOR: Used for application.ini's "Vendor" field, which also
# impacts profile location and user-visible fields.
# - MOZ_APP_BASENAME: Typically stays consistent for multiple branded
# versions of a given application (e.g. Aurora and Firefox both use
# "Firefox"), but may vary for full rebrandings (e.g. Iceweasel). Used
# for application.ini's "Name" field, which controls profile location in
# the absence of a "Profile" field (see below), and various system
# integration hooks (Unix remoting, Windows MessageWindow name, etc.)
# - MOZ_APP_DISPLAYNAME: Used in user-visible fields (DLL properties,
# Mac Bundle name, Updater, Installer), it is typically used for nightly
# builds (e.g. Aurora for Firefox).
# - MOZ_APP_NAME: Used for e.g. the binary program file name. If not set,
# defaults to a lowercase form of MOZ_APP_BASENAME.
# - MOZ_APP_PROFILE: When set, used for application.ini's
# "Profile" field, which controls profile location.

if test -z "$MOZ_APP_NAME"; then
   MOZ_APP_NAME=`echo $MOZ_APP_BASENAME | tr A-Z a-z`
fi

AC_SUBST(MOZ_APP_NAME)
AC_SUBST(MOZ_APP_DISPLAYNAME)
AC_SUBST(MOZ_APP_BASENAME)
AC_SUBST(MOZ_APP_VENDOR)
AC_SUBST(MOZ_APP_PROFILE)
AC_DEFINE_UNQUOTED(MOZ_APP_UA_NAME, "$MOZ_APP_UA_NAME")
AC_SUBST(MOZ_APP_UA_NAME)
AC_DEFINE_UNQUOTED(MOZ_APP_UA_VERSION, "$MOZ_APP_VERSION")
AC_SUBST(MOZ_APP_VERSION)
AC_DEFINE_UNQUOTED(MOZ_UA_FIREFOX_VERSION, "$FIREFOX_VERSION")
AC_DEFINE_UNQUOTED(FIREFOX_VERSION,$FIREFOX_VERSION)
AC_SUBST(FIREFOX_VERSION)
AC_DEFINE_UNQUOTED(MOZ_UA_BUILDID, "$MOZ_UA_BUILDID")
AC_SUBST(MOZ_UA_BUILDID)

AC_SUBST(MOZ_PKG_SPECIAL)

AC_SUBST(MOZILLA_OFFICIAL)

if test "$MOZ_TELEMETRY_REPORTING"; then
    AC_DEFINE(MOZ_TELEMETRY_REPORTING)
fi

dnl win32 options
AC_SUBST(MOZ_MAPINFO)
AC_SUBST(MOZ_BROWSE_INFO)
AC_SUBST(MOZ_TOOLS_DIR)
AC_SUBST(WIN32_REDIST_DIR)
AC_SUBST(PYTHON)
AC_SUBST(MAKENSISU)

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(SYSTEM_LIBXUL)
AC_SUBST(SYSTEM_JPEG)
AC_SUBST(SYSTEM_PNG)
AC_SUBST(SYSTEM_ZLIB)
AC_SUBST(SYSTEM_BZ2)

AC_SUBST(JPEG_CFLAGS)
AC_SUBST(JPEG_LIBS)
AC_SUBST(ZLIB_CFLAGS)
AC_SUBST(ZLIB_LIBS)
AC_SUBST(BZ2_CFLAGS)
AC_SUBST(BZ2_LIBS)
AC_SUBST(PNG_CFLAGS)
AC_SUBST(PNG_LIBS)

AC_SUBST(MOZ_JPEG_CFLAGS)
AC_SUBST(MOZ_JPEG_LIBS)
AC_SUBST(MOZ_ZLIB_CFLAGS)
AC_SUBST(MOZ_ZLIB_LIBS)
AC_SUBST(MOZ_BZ2_CFLAGS)
AC_SUBST(MOZ_BZ2_LIBS)
AC_SUBST(MOZ_PNG_CFLAGS)
AC_SUBST(MOZ_PNG_LIBS)

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

AC_SUBST(NSS_CFLAGS)
AC_SUBST(NSS_LIBS)
AC_SUBST(NSS_DEP_LIBS)
AC_SUBST(MOZ_NATIVE_NSS)
AC_SUBST(NSS_DISABLE_DBM)

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(WCHAR_CFLAGS)

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(MOZ_DISABLE_JAR_PACKAGING)
AC_SUBST(MOZ_CHROME_FILE_FORMAT)

AC_SUBST(WRAP_MALLOC_CFLAGS)
AC_SUBST(WRAP_MALLOC_LIB)
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_SUBST(NS_ENABLE_TSF)
AC_SUBST(MOZ_NSS_PATCH)
AC_SUBST(MOZ_APP_COMPONENT_LIBS)
AC_SUBST(MOZ_APP_EXTRA_LIBS)

AC_SUBST(MOZ_MEDIA)
AC_SUBST(MOZ_SYDNEYAUDIO)
AC_SUBST(MOZ_WAVE)
AC_SUBST(MOZ_VORBIS)
AC_SUBST(MOZ_TREMOR)
AC_SUBST(MOZ_WEBM)
AC_SUBST(MOZ_OGG)
AC_SUBST(MOZ_ALSA_LIBS)
AC_SUBST(VPX_AS)
AC_SUBST(VPX_ASFLAGS)
AC_SUBST(VPX_DASH_C_FLAG)
AC_SUBST(VPX_AS_CONVERSION)
AC_SUBST(VPX_ASM_SUFFIX)
AC_SUBST(VPX_X86_ASM)
AC_SUBST(VPX_ARM_ASM)
AC_SUBST(MOZ_INSTRUMENT_EVENT_LOOP)
AC_SUBST(LIBJPEG_TURBO_AS)
AC_SUBST(LIBJPEG_TURBO_ASFLAGS)
AC_SUBST(LIBJPEG_TURBO_X86_ASM)
AC_SUBST(LIBJPEG_TURBO_X64_ASM)

if test "$USING_HCC"; then
   CC='${topsrcdir}/build/hcc'
   CC="$CC '$_OLDCC'"
   CXX='${topsrcdir}/build/hcpp'
   CXX="$CXX '$_OLDCXX'"
   AC_SUBST(CC)
   AC_SUBST(CXX)
fi

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

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

fi # MOZ_X11

dnl Check for headers, etc. needed by WebGL.
if test -n "$MOZ_WEBGL_GLX"; then
    MOZ_CHECK_HEADER(GL/glx.h)
    if test "$ac_cv_header_GL_glx_h" != "yes"; then
        AC_MSG_ERROR([Can't find header GL/glx.h for WebGL (install mesa-common-dev (Ubuntu), mesa-libGL-devel (Fedora), or Mesa-devel (openSUSE))])
    fi
fi # MOZ_WEBGL_GLX
fi # COMPILE_ENVIRONMENT

if test "$USE_FC_FREETYPE"; then
    if test "$COMPILE_ENVIRONMENT"; then
    	_SAVE_CPPFLAGS="$CPPFLAGS"
    	CPPFLAGS="$CPPFLAGS $FT2_CFLAGS $XCFLAGS"
        AC_CHECK_HEADERS(fontconfig/fcfreetype.h, , 
            [AC_MSG_ERROR(Can't find header fontconfig/fcfreetype.h.)])
    	CPPFLAGS="$_SAVE_CPPFLAGS"
    else
        AC_DEFINE(HAVE_FONTCONFIG_FCFREETYPE_H)
    fi
fi

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

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

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

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 ========================================================

dnl The following defines are used by xpcom
_NON_GLOBAL_ACDEFINES="$_NON_GLOBAL_ACDEFINES
CPP_THROW_NEW
HAVE_CPP_2BYTE_WCHAR_T
HAVE_CPP_ACCESS_CHANGING_USING
HAVE_CPP_AMBIGUITY_RESOLVING_USING
HAVE_CPP_BOOL
HAVE_CPP_CHAR16_T
HAVE_CPP_DYNAMIC_CAST_TO_VOID_PTR
HAVE_CPP_EXPLICIT
HAVE_CPP_MODERN_SPECIALIZE_TEMPLATE_SYNTAX
HAVE_CPP_NAMESPACE_STD
HAVE_CPP_NEW_CASTS
HAVE_CPP_PARTIAL_SPECIALIZATION
HAVE_CPP_TROUBLE_COMPARING_TO_ZERO
HAVE_CPP_TYPENAME
HAVE_CPP_UNAMBIGUOUS_STD_NOTEQUAL
HAVE_STATVFS
NEED_CPP_UNUSED_IMPLEMENTATIONS
NEW_H
HAVE_GETPAGESIZE
HAVE_ICONV
HAVE_ICONV_WITH_CONST_INPUT
HAVE_MBRTOWC
HAVE_SYS_MOUNT_H
HAVE_SYS_VFS_H
HAVE_WCRTOMB
"

AC_CONFIG_HEADER(
netwerk/necko-config.h
xpcom/xpcom-config.h
xpcom/xpcom-private.h
)

# Hack around an Apple bug that effects the egrep that comes with OS X 10.7.
# "arch -arch i386 egrep" always uses the 32-bit Intel part of the egrep fat
# binary, even on 64-bit systems.  It should work on OS X 10.4.5 and up.  We
# (apparently) only need this hack when egrep's "pattern" is particularly
# long (as in the following code).  See bug 655339.
case "$host" in
*-apple-darwin*)
    FIXED_EGREP="arch -arch i386 egrep"
    ;;
*)
    FIXED_EGREP="egrep"
    ;;
esac

# 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=mozilla-config.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 _MOZILLA_CONFIG_H_
#define _MOZILLA_CONFIG_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 | $FIXED_EGREP -v "$_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

/* Force-include hunspell_alloc_hooks.h for hunspell, so that we don't need to
 * modify it directly.
 *
 * HUNSPELL_STATIC is defined in extensions/spellcheck/hunspell/src/Makefile.in,
 * unless --enable-system-hunspell is defined.
 */
#if defined(HUNSPELL_STATIC)
#include "hunspell_alloc_hooks.h"
#endif

#endif /* _MOZILLA_CONFIG_H_ */

EOF

  # Only write mozilla-config.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
$FIXED_EGREP -v "$_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

dnl Load the list of Makefiles to generate.
dnl   To add new Makefiles, edit allmakefiles.sh.
dnl   allmakefiles.sh sets the variable, MAKEFILES.
. ${srcdir}/allmakefiles.sh
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)

# Generate a JSON config file for unittest harnesses etc to read
# build configuration details from in a standardized way.
OS_TARGET=${OS_TARGET} TARGET_CPU=${TARGET_CPU} MOZ_DEBUG=${MOZ_DEBUG} \
MOZ_WIDGET_TOOLKIT=${MOZ_WIDGET_TOOLKIT} UNIVERSAL_BINARY=${UNIVERSAL_BINARY} \
  $PYTHON ${_topsrcdir}/config/writemozinfo.py ./mozinfo.json.tmp
if cmp -s ./mozinfo.json.tmp ./mozinfo.json; then
  rm ./mozinfo.json.tmp
else
  mv -f ./mozinfo.json.tmp ./mozinfo.json
fi

dnl Prevent the regeneration of cairo-features.h forcing rebuilds of gfx stuff
if test "$CAIRO_FEATURES_H"; then
  if cmp -s $CAIRO_FEATURES_H "$CAIRO_FEATURES_H".orig; then
    echo "$CAIRO_FEATURES_H is unchanged"
    mv -f "$CAIRO_FEATURES_H".orig "$CAIRO_FEATURES_H" 2> /dev/null
  else
    rm -f "$CAIRO_FEATURES_H".orig 2> /dev/null
  fi
fi

# Run freetype configure script

if test "$MOZ_TREE_FREETYPE"; then
   export CFLAGS="$CFLAGS -std=c99"
   export CPPFLAGS="$CPPFLAGS"
   export CXXFLAGS="$CXXFLAGS"
   export LDFLAGS="$LDFLAGS"
   export CONFIG_FILES="unix-cc.mk:unix-cc.in unix-def.mk:unix-def.in freetype-config freetype2.pc:freetype2.in"
   ac_configure_args="$ac_configure_args --host=$target --disable-shared --with-pic=yes"
   AC_OUTPUT_SUBDIRS(modules/freetype2)
fi

dnl ========================================================
dnl = Setup a nice relatively clean build environment for
dnl = sub-configures.
dnl ========================================================
CC="$_SUBDIR_CC" 
CXX="$_SUBDIR_CXX" 
CFLAGS="$_SUBDIR_CFLAGS" 
CPPFLAGS="$_SUBDIR_CPPFLAGS"
CXXFLAGS="$_SUBDIR_CXXFLAGS"
LDFLAGS="$_SUBDIR_LDFLAGS"
HOST_CC="$_SUBDIR_HOST_CC" 
HOST_CFLAGS="$_SUBDIR_HOST_CFLAGS"
HOST_LDFLAGS="$_SUBDIR_HOST_LDFLAGS"
RC=

unset MAKEFILES
unset CONFIG_FILES

# No need to run subconfigures when building with LIBXUL_SDK_DIR
if test "$COMPILE_ENVIRONMENT" -a -z "$LIBXUL_SDK_DIR"; then

if test -n "$_WRAP_MALLOC"; then
  _SUBDIR_CONFIG_ARGS="$_SUBDIR_CONFIG_ARGS --enable-wrap-malloc"
fi

if test -z "$MOZ_NATIVE_NSPR"; then
    ac_configure_args="$_SUBDIR_CONFIG_ARGS --with-dist-prefix=$MOZ_BUILD_ROOT/dist --with-mozilla"
    if test -z "$MOZ_DEBUG"; then
        ac_configure_args="$ac_configure_args --disable-debug"
    fi
    if test "$MOZ_OPTIMIZE" = "1"; then
        ac_configure_args="$ac_configure_args --enable-optimize"
    fi
    if test "$OS_ARCH" = "WINNT" -a "$NS_TRACE_MALLOC"; then
       ac_configure_args="$ac_configure_args --enable-debug --disable-optimize"
    fi
    if test -n "$HAVE_64BIT_OS"; then
        ac_configure_args="$ac_configure_args --enable-64bit"
    fi
    if test -n "$USE_ARM_KUSER"; then
        ac_configure_args="$ac_configure_args --with-arm-kuser"
    fi
    AC_OUTPUT_SUBDIRS(nsprpub)
    ac_configure_args="$_SUBDIR_CONFIG_ARGS"
fi

if test -z "$MOZ_NATIVE_NSPR"; then
    # Hack to deal with the fact that we use NSPR_CFLAGS everywhere
    AC_MSG_WARN([Recreating autoconf.mk with updated nspr-config output])
    if test "$OS_ARCH" != "WINNT"; then
       NSPR_LIBS=`./nsprpub/config/nspr-config --prefix=$LIBXUL_DIST --exec-prefix=$MOZ_BUILD_ROOT/dist --libdir=$LIBXUL_DIST/lib --libs`
       $PERL -pi.bak -e "s '^NSPR_LIBS\\s*=.*'NSPR_LIBS = $NSPR_LIBS'" config/autoconf.mk
       NSPR_CFLAGS=`./nsprpub/config/nspr-config --prefix=$LIBXUL_DIST --exec-prefix=$MOZ_BUILD_ROOT/dist --includedir=$LIBXUL_DIST/include/nspr --cflags`
       $PERL -pi.bak -e "s '^NSPR_CFLAGS\\s*=.*'NSPR_CFLAGS = $NSPR_CFLAGS'" config/autoconf.mk
    fi
    rm -f config/autoconf.mk.bak
fi

# Run the SpiderMonkey 'configure' script.
dist=$MOZ_BUILD_ROOT/dist
ac_configure_args="$_SUBDIR_CONFIG_ARGS"
ac_configure_args="$ac_configure_args --enable-threadsafe"
if test "$BUILD_CTYPES"; then
    # Build js-ctypes on the platforms we can.
    ac_configure_args="$ac_configure_args --enable-ctypes"
fi
if test -z "$JS_SHARED_LIBRARY" ; then
    ac_configure_args="$ac_configure_args --disable-shared-js"
fi
if test -z "$MOZ_NATIVE_NSPR"; then
    ac_configure_args="$ac_configure_args --with-nspr-cflags='$NSPR_CFLAGS'"
    ac_configure_args="$ac_configure_args --with-nspr-libs='$NSPR_LIBS'"
fi
ac_configure_args="$ac_configure_args --with-dist-dir=../../dist"
ac_configure_args="$ac_configure_args --prefix=$dist"
ac_configure_args="$ac_configure_args --with-sync-build-files=$_topsrcdir"
if test "$MOZ_MEMORY"; then
   ac_configure_args="$ac_configure_args --enable-jemalloc"
   if test -n "$MOZ_MEMORY_LDFLAGS"; then
     export MOZ_MEMORY_LDFLAGS
   fi
fi
export MOZ_APP_NAME
AC_OUTPUT_SUBDIRS(js/src)
ac_configure_args="$_SUBDIR_CONFIG_ARGS"

fi # COMPILE_ENVIRONMENT && !LIBXUL_SDK_DIR

dnl Prevent the regeneration of autoconf.mk forcing rebuilds of the world
dnl Needs to be at the end to respect possible changes from NSPR configure
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

