js/src/old-configure.in
author Mike Hommey <mh+mozilla@glandium.org>
Thu, 13 Dec 2018 11:10:44 +0900
changeset 508167 67b2bddb5884ec728f0887eedf2caa05a28feca2
parent 505963 cceb6f9235a1fc81f1fe2e72be3fb93cd4f5e05c
child 508174 93d4d156771f860e7d85625edd00bfea5bf70ee3
permissions -rw-r--r--
Bug 1513798 - Revert bug 638149 and leave it to configure to set -dead_strip. r=nalexander We're always setting -dead_strip on mac builds, per cross-mozconfig.common, we might as well not do that and revert bug 638149, which disabled adding -dead_strip with LTO: that is apparently not a problem anymore. Differential Revision: https://phabricator.services.mozilla.com/D14373

dnl -*- Mode: Autoconf; tab-width: 4; indent-tabs-mode: nil; -*-
dnl vi: set tabstop=4 shiftwidth=4 expandtab syntax=m4:
dnl This Source Code Form is subject to the terms of the Mozilla Public
dnl License, v. 2.0. If a copy of the MPL was not distributed with this
dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.

dnl Process this file with autoconf to produce a configure script.
dnl ========================================================
AC_PREREQ(2.13)
AC_INIT(js/src/jsapi.h)
AC_CONFIG_AUX_DIR(${srcdir}/build/autoconf)
AC_CANONICAL_SYSTEM

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

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

dnl Set the version number of the libs included with mozilla
dnl ========================================================
NSPR_VERSION=4
NSPR_MINVER=4.9.2

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

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

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

LDFLAGS="$LDFLAGS $LINKER_LDFLAGS"

if test -z "$JS_STANDALONE"; then
  autoconfmk=autoconf-js.mk
fi
AC_SUBST(autoconfmk)

if test -n "$JS_STANDALONE"; then
  jsconfdefs=$_objdir/js/src/js-confdefs.h
else
  jsconfdefs=$_objdir/js-confdefs.h
fi

MOZ_ANDROID_NDK

case "$target" in
*-apple-darwin*)
    MOZ_IOS_SDK
    ;;
esac

dnl ========================================================
dnl Checks for compilers.
dnl ========================================================

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

if test "$COMPILE_ENVIRONMENT"; then

# Note:
#   In Mozilla, we use the names $target, $host and $build incorrectly, but are
#   too far gone to back out now. See Bug 475488:
#     - When we say $target, we mean $host, that is, the system on which
#       Mozilla will be run.
#     - When we say $host, we mean $build, that is, the system on which Mozilla
#       is built.
#     - $target (in its correct usage) is for compilers who generate code for a
#       different platform than $host, so it would not be used by Mozilla.
if test "$target" != "$host"; then
    MOZ_CROSS_COMPILER
else
    AC_PROG_CC
    AC_PROG_CXX
    AC_PROG_RANLIB
    MOZ_PATH_PROGS(AS, $AS as, $CC)
    AC_CHECK_PROGS(AR, ar, :)
    AC_CHECK_PROGS(STRIP, strip, :)
    AC_CHECK_PROGS(WINDRES, windres, :)
    if test -z "$HOST_CC"; then
        HOST_CC='$(CC)'
    fi
    if test -z "$HOST_CXX"; then
        HOST_CXX='$(CXX)'
    fi
    if test -z "$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

MOZ_TOOL_VARIABLES

dnl Special win32 checks
dnl ========================================================

# Target the Windows 8.1 SDK by default
WINVER=601

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

        # Make sure compilers are valid
        CFLAGS="$CFLAGS -nologo"
        CXXFLAGS="$CXXFLAGS -TP -nologo"
        if test -z "$CLANG_CL"; then
            CPPFLAGS="$CPPFLAGS -utf-8"
        fi
        # MSVC warning C4800 warns when a value is implicitly cast to bool,
        # because this also forces narrowing to a single byte, which can be a
        # perf hit.  But this matters so little in practice (and often we want
        # that behavior) that it's better to turn it off.
        # _CRT_SECURE_NO_WARNINGS disables warnings about using MSVC-specific
        # secure CRT functions.
        # MSVC warning C4595 warns non-member operator new or delete functions
        # may not be declared inline, as of VS2015 Update 2.
        CXXFLAGS="$CXXFLAGS -wd4800 -wd4595 -D_CRT_SECURE_NO_WARNINGS"
        AC_LANG_SAVE
        AC_LANG_C
        AC_TRY_COMPILE([#include <stdio.h>],
            [ printf("Hello World\n"); ],,
            AC_MSG_ERROR([\$(CC) test failed.  You must have MS VC++ in your path to build.]) )

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

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

        _MSC_VER=`echo ${CC_VERSION} | cut -c 1-2,4-5`

        AC_DEFINE(_CRT_SECURE_NO_WARNINGS)
        AC_DEFINE(_CRT_NONSTDC_NO_WARNINGS)
        AC_DEFINE(_USE_MATH_DEFINES) # Otherwise MSVC's math.h doesn't #define M_PI.

        if test "$_MSC_VER" -ge "1910"; then # VS2017+
            # C5038: Enable initializer list order warnings
            # The -w1#### flag treats warning C#### as if it was a warning level
            # 1 warning, and thus enables it because we enable /W3 warnings. We
            # don't use -we#### because it would enable warning C#### but treat
            # it as an error, even in third-party code.
            # https://docs.microsoft.com/en-us/cpp/build/reference/compiler-option-warning-level
            CXXFLAGS="$CXXFLAGS -w15038"
        fi

        _CC_SUITE=14
        MSVC_C_RUNTIME_DLL=vcruntime140.dll
        MSVC_CXX_RUNTIME_DLL=msvcp140.dll

        # C5026: move constructor was implicitly defined as deleted
        CXXFLAGS="$CXXFLAGS -wd5026"

        # C5027: move assignment operator was implicitly defined as deleted
        CXXFLAGS="$CXXFLAGS -wd5027"

        # -Zc:sizedDealloc- disables C++14 global sized deallocation (see bug 1160146)
        CXXFLAGS="$CXXFLAGS -Zc:sizedDealloc-"

        AC_SUBST(MSVC_C_RUNTIME_DLL)
        AC_SUBST(MSVC_CXX_RUNTIME_DLL)

        # Check linker version, except in lld builds
        case "$LINKER" in
        *lld*)
            ;;
        *)
            _LD_FULL_VERSION=`"${LINKER}" -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
            ;;
        esac

        INCREMENTAL_LINKER=1

        unset _MSVC_VER_FILTER

        CFLAGS="$CFLAGS -D_HAS_EXCEPTIONS=0"
        CXXFLAGS="$CXXFLAGS -D_HAS_EXCEPTIONS=0"
    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
    fi # !GNU_CC

    AC_DEFINE_UNQUOTED(WINVER,0x$WINVER)
    AC_DEFINE_UNQUOTED(_WIN32_WINNT,0x$WINVER)
    # Require OS features provided by IE 8.0 (Win7)
    AC_DEFINE_UNQUOTED(_WIN32_IE,0x0800)

    ;;
esac

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

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

    # Common to all MSVC environments:

    AC_DEFINE(HAVE_LOCALECONV)
    AC_CHECK_FUNCS([_getc_nolock])
fi

fi # COMPILE_ENVIRONMENT

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

AC_SUBST(_MSC_VER)

AC_SUBST(GNU_CC)
AC_SUBST(GNU_CXX)

dnl ========================================================
dnl Checks for programs.
dnl ========================================================
if test "$COMPILE_ENVIRONMENT"; then

dnl ========================================================
dnl = Mac OS X SDK support
dnl ========================================================
MACOS_SDK_DIR=
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.
AC_SUBST(MACOS_SDK_DIR)

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

  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}"

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

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

AC_PATH_XTRA

XCFLAGS="$X_CFLAGS"

fi # COMPILE_ENVIRONMENT

# Separate version into components for use in shared object naming etc
changequote(,)
MOZJS_MAJOR_VERSION=`echo $MOZILLA_VERSION | sed "s|\(^[0-9]*\)\.[0-9]*.*|\1|"`
MOZJS_MINOR_VERSION=`echo $MOZILLA_VERSION | sed "s|^[0-9]*\.\([0-9]*\).*|\1|"`
MOZJS_PATCH_VERSION=`echo $MOZILLA_VERSION | sed "s|^[0-9]*\.[0-9]*[^0-9]*||"`
IS_ALPHA=`echo $MOZILLA_VERSION | grep '[ab]'`

dnl XXX in a temporary bid to avoid developer anger at renaming files
dnl XXX before "js" symlinks exist, don't change names.
dnl
dnl if test -n "$JS_STANDALONE"; then
dnl JS_SHELL_NAME=js$MOZJS_MAJOR_VERSION
dnl JS_CONFIG_NAME=js$MOZJS_MAJOR_VERSION-config
dnl else
JS_SHELL_NAME=js
JS_CONFIG_NAME=js-config
dnl fi

changequote([,])
if test -n "$IS_ALPHA"; then
  changequote(,)
  MOZJS_ALPHA=`echo $MOZILLA_VERSION | sed "s|^[0-9]*\.[0-9\.]*\([^0-9]\).*|\1|"`
  changequote([,])
fi
AC_DEFINE_UNQUOTED(MOZJS_MAJOR_VERSION,$MOZJS_MAJOR_VERSION)
AC_DEFINE_UNQUOTED(MOZJS_MINOR_VERSION,$MOZJS_MINOR_VERSION)
AC_SUBST(JS_SHELL_NAME)
AC_SUBST(JS_CONFIG_NAME)
AC_SUBST(MOZJS_MAJOR_VERSION)
AC_SUBST(MOZJS_MINOR_VERSION)
AC_SUBST(MOZJS_PATCH_VERSION)
AC_SUBST(MOZJS_ALPHA)


dnl ========================================================
dnl set the defaults first
dnl ========================================================
AR_EXTRACT='$(AR) x'
MOZ_USER_DIR=".mozilla"

MOZ_FIX_LINK_PATHS="-Wl,-rpath-link,${DIST}/bin -Wl,-rpath-link,${prefix}/lib"

dnl Configure platform-specific CPU architecture compiler options.
dnl ==============================================================
MOZ_ARCH_OPTS

dnl ========================================================
dnl Android libstdc++, placed here so it can use MOZ_ARCH
dnl computed above.
dnl ========================================================

MOZ_ANDROID_CPU_ARCH
MOZ_ANDROID_STLPORT

dnl ========================================================
dnl Suppress Clang Argument Warnings
dnl ========================================================
WARNINGS_CFLAGS="$_WARNINGS_CFLAGS"
if test -n "${CLANG_CC}${CLANG_CL}"; then
    WARNINGS_CFLAGS="-Qunused-arguments $WARNINGS_CFLAGS"
    CPPFLAGS="-Qunused-arguments ${CPPFLAGS}"
fi
if test -n "${CLANG_CXX}${CLANG_CL}"; then
    _WARNINGS_CXXFLAGS="-Qunused-arguments ${_WARNINGS_CXXFLAGS}"
fi

MOZ_CONFIG_SANITIZE

dnl ========================================================
dnl GNU specific defaults
dnl ========================================================
if test "$GNU_CC"; then
    DSO_LDOPTS='-shared'
    if test "$GCC_USE_GNU_LD"; then
        # Some tools like ASan use a runtime library that is only
        # linked against executables, so we must allow undefined
        # symbols for shared objects in some cases.
        if test -z "$MOZ_ASAN$MOZ_MSAN$MOZ_UBSAN$MOZ_TSAN$FUZZING_INTERFACES"; then
            # Don't allow undefined symbols in libraries
            DSO_LDOPTS="$DSO_LDOPTS -Wl,-z,defs"
        fi
    fi
    WARNINGS_AS_ERRORS='-Werror'
    DSO_CFLAGS=''

    if test "$OS_ARCH" != "WINNT"; then
        DSO_PIC_CFLAGS='-fPIC'
        ASFLAGS="$ASFLAGS -fPIC"
    fi

    AC_MSG_CHECKING([for --noexecstack option to as])
    _SAVE_CFLAGS=$CFLAGS
    CFLAGS="$CFLAGS -Wa,--noexecstack"
    AC_TRY_COMPILE(,,AC_MSG_RESULT([yes])
                     [ASFLAGS="$ASFLAGS -Wa,--noexecstack"],
                     AC_MSG_RESULT([no]))
    CFLAGS=$_SAVE_CFLAGS
    AC_MSG_CHECKING([for -z noexecstack option to ld])
    _SAVE_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,-z,noexecstack"
    AC_TRY_LINK(,,AC_MSG_RESULT([yes]),
                  AC_MSG_RESULT([no])
                  LDFLAGS=$_SAVE_LDFLAGS)

    AC_MSG_CHECKING([for -z text option to ld])
    _SAVE_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,-z,text"
    AC_TRY_LINK(,,AC_MSG_RESULT([yes]),
                  AC_MSG_RESULT([no])
                  LDFLAGS=$_SAVE_LDFLAGS)

    AC_MSG_CHECKING([for -z relro option to ld])
    _SAVE_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,-z,relro"
    AC_TRY_LINK(,,AC_MSG_RESULT([yes]),
                  AC_MSG_RESULT([no])
                  LDFLAGS=$_SAVE_LDFLAGS)

    AC_MSG_CHECKING([for -z nocopyreloc option to ld])
    _SAVE_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,-z,nocopyreloc"
    AC_TRY_LINK(,,AC_MSG_RESULT([yes]),
                  AC_MSG_RESULT([no])
                  LDFLAGS=$_SAVE_LDFLAGS)

    AC_MSG_CHECKING([for -Bsymbolic-functions option to ld])
    _SAVE_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,-Bsymbolic-functions"
    AC_TRY_LINK(,,AC_MSG_RESULT([yes]),
                  AC_MSG_RESULT([no])
                  LDFLAGS=$_SAVE_LDFLAGS)

    AC_MSG_CHECKING([for --build-id=sha1 option to ld])
    _SAVE_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,--build-id=sha1"
    AC_TRY_LINK(,,AC_MSG_RESULT([yes]),
                  AC_MSG_RESULT([no])
                  LDFLAGS=$_SAVE_LDFLAGS)

    _DEFINES_CFLAGS="-include $jsconfdefs -DMOZILLA_CLIENT"
    _USE_CPP_INCLUDE_FLAG=1
fi

if test "$GNU_CXX"; then
    _DEFINES_CXXFLAGS="-DMOZILLA_CLIENT -include $jsconfdefs"
    _USE_CPP_INCLUDE_FLAG=1
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 -nologo"
        HOST_RANLIB='echo ranlib'
    else
        HOST_CFLAGS="$HOST_CFLAGS -mwindows"
    fi
    HOST_CFLAGS="$HOST_CFLAGS -DXP_WIN32 -DXP_WIN -DWIN32 -D_WIN32 -D_CRT_SECURE_NO_WARNINGS"
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O2}"
    HOST_BIN_SUFFIX=.exe

    case "${host_cpu}" in
    i*86)
        if test -n "$_WIN32_MSVC"; then
            HOST_LDFLAGS="$HOST_LDFLAGS -MACHINE:X86"
        fi
        ;;
    x86_64)
        if test -n "$_WIN32_MSVC"; then
            HOST_LDFLAGS="$HOST_LDFLAGS -MACHINE:X64"
        fi
        HOST_CFLAGS="$HOST_CFLAGS -D_AMD64_"
        ;;
    esac
    ;;

*-darwin*)
    HOST_CFLAGS="$HOST_CFLAGS -DXP_UNIX -DXP_MACOSX"
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O3}"
    ;;

*-linux*|*-kfreebsd*-gnu|*-gnu*)
    HOST_CFLAGS="$HOST_CFLAGS -DXP_UNIX"
    HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O3}"
    ;;

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

dnl ========================================================
dnl Add optional and non-optional hardening flags from toolchain.configure
dnl ========================================================

CFLAGS="$CFLAGS $MOZ_HARDENING_CFLAGS_JS"
CPPFLAGS="$CPPFLAGS $MOZ_HARDENING_CFLAGS_JS"
CXXFLAGS="$CXXFLAGS $MOZ_HARDENING_CFLAGS_JS"

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

case "$target" in
*-darwin*)
    MOZ_OPTIMIZE_FLAGS="-O3"
    CFLAGS="$CFLAGS -fno-common"
    CXXFLAGS="$CXXFLAGS -fno-common -stdlib=libc++"
    DSO_LDOPTS=''
    STRIP="$STRIP -x -S"
    LDFLAGS="$LDFLAGS -lobjc"
    # The ExceptionHandling framework is needed for Objective-C exception
    # logging code in nsObjCExceptions.h. Currently we only use that in debug
    # builds.
    _SAVE_LDFLAGS=$LDFLAGS
     AC_MSG_CHECKING([for -framework ExceptionHandling])
    LDFLAGS="$LDFLAGS -framework ExceptionHandling"
    AC_TRY_LINK(,[return 0;],
                ac_cv_have_framework_exceptionhandling="yes",
                ac_cv_have_framework_exceptionhandling="no")
    AC_MSG_RESULT([$ac_cv_have_framework_exceptionhandling])
    if test  "$ac_cv_have_framework_exceptionhandling" = "yes"; then
      MOZ_DEBUG_LDFLAGS="$MOZ_DEBUG_LDFLAGS -framework ExceptionHandling";
    fi
    LDFLAGS=$_SAVE_LDFLAGS

    dnl DTrace and -dead_strip don't interact well. See bug 403132.
    dnl ===================================================================
    if 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=$_SAVE_LDFLAGS
    fi
    MOZ_FIX_LINK_PATHS="-Wl,-executable_path,${DIST}/bin"
    ;;

*-android*|*-linuxandroid*)
    AC_DEFINE(NO_PW_GECOS)
    MOZ_GFX_OPTIMIZE_MOBILE=1
    MOZ_OPTIMIZE_FLAGS="-O3"
    if test -z "$CLANG_CC"; then
       MOZ_OPTIMIZE_FLAGS="-freorder-blocks -fno-reorder-functions $MOZ_OPTIMIZE_FLAGS"
    fi
    ;;

*-*linux*)
    if test "$GNU_CC" -o "$GNU_CXX"; then
        MOZ_PGO_OPTIMIZE_FLAGS="-O3"
        MOZ_OPTIMIZE_FLAGS="-O3"
        if test -z "$CLANG_CC"; then
           MOZ_OPTIMIZE_FLAGS="-freorder-blocks $MOZ_OPTIMIZE_FLAGS"
        fi
    fi

    case "${target_cpu}" in
    alpha*)
    	CFLAGS="$CFLAGS -mieee"
    	CXXFLAGS="$CXXFLAGS -mieee"
    ;;
    esac
    ;;

*-mingw*)
    DSO_CFLAGS=
    DSO_PIC_CFLAGS=
    RC=rc.exe
    if test -n "$GNU_CC" -o -n "$CLANG_CC"; then
        CC="$CC -mwindows"
        CXX="$CXX -mwindows"
        CPP="$CPP -mwindows"
        CFLAGS="$CFLAGS -mms-bitfields"
        CXXFLAGS="$CXXFLAGS -mms-bitfields"
        DSO_LDOPTS='-shared'
        RC='$(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 -lusp10 -lgdi32 -lwinmm -lwsock32"
        MOZ_FIX_LINK_PATHS=

        if test -z "$CLANG_CC"; then
            # Use static libgcc and libstdc++
            LDFLAGS="$LDFLAGS -static"
        else
            # Silence problematic clang warnings
            CXXFLAGS="$CXXFLAGS -Wno-incompatible-ms-struct"
        fi

        MOZ_OPTIMIZE_FLAGS="-O2"

        WIN32_CONSOLE_EXE_LDFLAGS=-mconsole
        WIN32_GUI_EXE_LDFLAGS=-mwindows
    else
        TARGET_COMPILER_ABI=msvc
        HOST_CC='$(CC)'
        HOST_CXX='$(CXX)'
        case "$LINKER" in
        *lld*)
            AR='llvm-lib'
            AR_FLAGS='-llvmlibthin -out:$@'
            ;;
        *)
            AR='lib'
            AR_FLAGS='-NOLOGO -OUT:$@'
            ;;
        esac
        AR_EXTRACT=
        RANLIB='echo not_ranlib'
        STRIP='echo not_strip'
        PKG_SKIP_STRIP=1
        # aarch64 doesn't support subsystems below 6.02
        if test "$CPU_ARCH" = "aarch64"; then
            WIN32_SUBSYSTEM_VERSION=6.02
        else
            WIN32_SUBSYSTEM_VERSION=6.01
        fi
        WIN32_CONSOLE_EXE_LDFLAGS=-SUBSYSTEM:CONSOLE,$WIN32_SUBSYSTEM_VERSION
        WIN32_GUI_EXE_LDFLAGS=-SUBSYSTEM:WINDOWS,$WIN32_SUBSYSTEM_VERSION
        DSO_LDOPTS=-SUBSYSTEM:WINDOWS,$WIN32_SUBSYSTEM_VERSION
        _USE_CPP_INCLUDE_FLAG=1
        _DEFINES_CFLAGS="-FI $jsconfdefs -DMOZILLA_CLIENT"
        _DEFINES_CXXFLAGS="-FI $jsconfdefs -DMOZILLA_CLIENT"
        CFLAGS="$CFLAGS -W3 -Gy -Zc:inline"
        CXXFLAGS="$CXXFLAGS -W3 -Gy -Zc:inline"
        if test "$CPU_ARCH" = "x86";then
          dnl VS2012+ defaults to -arch:SSE2. We want to target nothing
          dnl more recent, so set that explicitly here unless another
          dnl target arch has already been set.
          changequote(,)
          if test -z `echo $CFLAGS | grep -i [-/]arch:` ; then
            CFLAGS="$CFLAGS -arch:SSE2"
          fi
          if test -z `echo $CXXFLAGS | grep -i [-/]arch:` ; then
            CXXFLAGS="$CXXFLAGS -arch:SSE2"
          fi
          changequote([,])
        fi
        dnl VS2013+ supports -Gw for better linker optimizations.
        dnl http://blogs.msdn.com/b/vcblog/archive/2013/09/11/introducing-gw-compiler-switch.aspx
        dnl Disabled on ASan because it causes false-positive ODR violations.
        if test -z "$MOZ_ASAN"; then
            CFLAGS="$CFLAGS -Gw"
            CXXFLAGS="$CXXFLAGS -Gw"
        fi
        # khuey says we can safely ignore MSVC warning C4251
        # MSVC warning C4244 (implicit type conversion may lose data) warns
        # and requires workarounds for perfectly valid code.  Also, GCC/clang
        # don't warn about it by default. So for consistency/sanity, we turn
        # it off on MSVC, too.
        # MSVC warning C4267 warns for narrowing type conversions from size_t
        # to 32-bit integer types on 64-bit platforms.  Since this is virtually
        # the same thing as C4244, we disable C4267, too.
        CFLAGS="$CFLAGS -wd4244 -wd4267"
        CXXFLAGS="$CXXFLAGS -wd4244 -wd4267 -wd4251"
        # Silence "warning C4065: switch statement contains 'default' but no
        # 'case' labels".  See bug 1461304.
        CXXFLAGS="$CXXFLAGS -wd4065"
        if test -n "$CLANG_CL"; then
            # XXX We should combine some of these with our generic GCC-style
            # warning checks.
            #
            # Suppress the clang-cl warning for the inline 'new' and 'delete' in mozalloc
            CXXFLAGS="$CXXFLAGS -Wno-inline-new-delete"
            # We use offsetof on non-POD objects all the time.
            # We also suppress this warning on other platforms.
            CXXFLAGS="$CXXFLAGS -Wno-invalid-offsetof"
            # This warns for reasonable things like:
            #   enum { X = 0xffffffffU };
            # which is annoying for IDL headers.
            CXXFLAGS="$CXXFLAGS -Wno-microsoft-enum-value"
            # This warns for cases that would be reached by the Microsoft
            # #include rules, but also currently warns on cases that would
            # *also* be reached by standard C++ include rules.  That
            # behavior doesn't seem useful, so we turn it off.
            CXXFLAGS="$CXXFLAGS -Wno-microsoft-include"
            # We normally error out on unknown pragmas, but since clang-cl
            # claims to be MSVC, it would be difficult to add
            # #if defined(_MSC_VER) && !defined(__clang__) everywhere we
            # use such pragmas, so just ignore them.
            CFLAGS="$CFLAGS -Wno-unknown-pragmas"
            CXXFLAGS="$CXXFLAGS -Wno-unknown-pragmas"
            # We get errors about various #pragma intrinsic directives from
            # clang-cl, and we don't need to hear about those.
            CFLAGS="$CFLAGS -Wno-ignored-pragmas"
            CXXFLAGS="$CXXFLAGS -Wno-ignored-pragmas"
            # clang-cl's Intrin.h marks things like _ReadWriteBarrier
            # as __attribute((__deprecated__)).  This is nice to know,
            # but since we don't get the equivalent warning from MSVC,
            # let's just ignore it.
            CFLAGS="$CFLAGS -Wno-deprecated-declarations"
            CXXFLAGS="$CXXFLAGS -Wno-deprecated-declarations"
            # We use a function like:
            #   __declspec(noreturn) __inline void f() {}
            # which -Winvalid-noreturn complains about.  Again, MSVC seems
            # OK with it, so let's silence the warning.
            CFLAGS="$CFLAGS -Wno-invalid-noreturn"
            CXXFLAGS="$CXXFLAGS -Wno-invalid-noreturn"
            # Missing |override| on virtual function declarations isn't
            # something that MSVC currently warns about.
            CXXFLAGS="$CXXFLAGS -Wno-inconsistent-missing-override"
            # We use -DHAS_EXCEPTIONS=0, which removes the |throw()|
            # declaration on |operator delete(void*)|.  However, clang-cl
            # must internally declare |operator delete(void*)| differently,
            # which causes this warning for virtually every file in the
            # tree.  clang-cl doesn't support -fno-exceptions or equivalent,
            # so there doesn't seem to be any way to convince clang-cl to
            # declare |delete| differently.  Therefore, suppress this
            # warning.
            CXXFLAGS="$CXXFLAGS -Wno-implicit-exception-spec-mismatch"
            # At least one MSVC header and several headers in-tree have
            # unused typedefs, so turn this on.
            CXXFLAGS="$CXXFLAGS -Wno-unused-local-typedef"
            # jemalloc uses __declspec(allocator) as a profiler hint,
            # which clang-cl doesn't understand.
            CXXFLAGS="$CXXFLAGS -Wno-ignored-attributes"
            # __attribute__((unused)) really means "might be unused" and
            # we use it to avoid warnings about things that are unused
            # in some compilation units, but used in many others.  This
            # warning insists on complaining about the latter case, which
            # is annoying, and rather noisy.
            CXXFLAGS="$CXXFLAGS -Wno-used-but-marked-unused"
        fi
        # make 'foo == bar;' error out
        CFLAGS="$CFLAGS -we4553"
        CXXFLAGS="$CXXFLAGS -we4553"
        LIBS="$LIBS kernel32.lib user32.lib gdi32.lib winmm.lib wsock32.lib advapi32.lib"
        MOZ_DEBUG_LDFLAGS='-DEBUG'
        WARNINGS_AS_ERRORS='-WX'
        MOZ_OPTIMIZE_FLAGS="-O2"
        MOZ_FIX_LINK_PATHS=
        LDFLAGS="$LDFLAGS -LARGEADDRESSAWARE"
        if test -z "$DEVELOPER_OPTIONS"; then
            LDFLAGS="$LDFLAGS -RELEASE"
        fi
        RCFLAGS="-nologo"
    fi
    AC_DEFINE(HAVE__MSIZE)
    AC_DEFINE(WIN32_LEAN_AND_MEAN)
    dnl See http://support.microsoft.com/kb/143208 to use STL
    AC_DEFINE(NOMINMAX)
    BIN_SUFFIX='.exe'
    MOZ_USER_DIR="Mozilla"

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

    if test -n "$GNU_CC" -a -z "$CLANG_CC"; then
        CFLAGS="$CFLAGS -fno-keep-inline-dllexport"
        CXXFLAGS="$CXXFLAGS -fno-keep-inline-dllexport"
    fi

    case "$target" in
    i*86-*)
        if test -n "$GNU_CC"; then
            CFLAGS="$CFLAGS -mstackrealign"
            CXXFLAGS="$CXXFLAGS -mstackrealign"
            LDFLAGS="$LDFLAGS -Wl,--large-address-aware"
        else
            DSO_LDOPTS="$DSO_LDOPTS -MACHINE:X86"
            LDFLAGS="$LDFLAGS -SAFESEH"
        fi

    	AC_DEFINE(_X86_)
	;;
    x86_64-*)
        if test -n "$_WIN32_MSVC"; then
            DSO_LDOPTS="$DSO_LDOPTS -MACHINE:X64"
        fi
        AC_DEFINE(_AMD64_)
        ;;
    aarch64-*)
        if test -n "$_WIN32_MSVC"; then
            DSO_LDOPTS="$DSO_LDOPTS -MACHINE:ARM64"
        fi
        AC_DEFINE(_ARM64_)
        ;;
    *)
    	AC_DEFINE(_CPU_ARCH_NOT_DEFINED)
	;;
    esac
    ;;

*-netbsd*)
    DSO_CFLAGS=''
    CFLAGS="$CFLAGS -Dunix"
    CXXFLAGS="$CXXFLAGS -Dunix"
    if $CC -E - -dM </dev/null | grep __ELF__ >/dev/null; then
        DSO_PIC_CFLAGS='-fPIC -DPIC'
        DSO_LDOPTS='-shared'
        MOZ_PROGRAM_LDFLAGS="$MOZ_PROGRAM_LDFLAGS -Wl,--export-dynamic"
    else
    	DSO_PIC_CFLAGS='-fPIC -DPIC'
    	DSO_LDOPTS='-shared'
    fi
    # This will fail on a.out systems prior to 1.5.1_ALPHA.
    if test "$LIBRUNPATH"; then
	DSO_LDOPTS="-Wl,-R$LIBRUNPATH $DSO_LDOPTS"
    fi
    ;;

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

*-solaris*)
    MOZ_FIX_LINK_PATHS="-L${DIST}/bin"
    ;;

esac

if test -z "$MOZ_OPTIMIZE_FLAGS"; then
	MOZ_OPTIMIZE_FLAGS="-O"
fi

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

if test -n "$COMPILE_ENVIRONMENT"; then
    MOZ_COMPILER_OPTS
fi

if test -z "$SKIP_COMPILER_CHECKS"; then
dnl Checks for typedefs, structures, and compiler characteristics.
dnl ========================================================
AC_C_CONST
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_LANG_CPLUSPLUS
AC_LANG_C
AC_MSG_CHECKING(for ssize_t)
AC_CACHE_VAL(ac_cv_type_ssize_t,
 [AC_TRY_COMPILE([#include <stdio.h>
                  #include <sys/types.h>],
                 [ssize_t foo = 0;],
                 [ac_cv_type_ssize_t=true],
                 [ac_cv_type_ssize_t=false])])
if test "$ac_cv_type_ssize_t" = true ; then
  AC_DEFINE(HAVE_SSIZE_T)
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

AC_LANG_CPLUSPLUS

MOZ_CXX11

case "${OS_TARGET}" in
WINNT|Darwin|Android)
  ;;
*)
  STL_FLAGS="-I${DIST}/stl_wrappers"
  WRAP_STL_INCLUDES=1
  ;;
esac

dnl Checks for header files.
dnl ========================================================
AC_HEADER_DIRENT
case "$target_os" in
freebsd*)
# for stuff like -lXshm
    CPPFLAGS="${CPPFLAGS} ${X_CFLAGS}"
    ;;
esac

MOZ_ARG_ENABLE_BOOL(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)

dnl Checks for libraries.
dnl ========================================================
AC_CHECK_LIB(c_r, gethostbyname_r)

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*)
    ;;
*)
    AC_SEARCH_LIBS(dlopen, dl,
        MOZ_CHECK_HEADER(dlfcn.h,
        AC_DEFINE(HAVE_DLOPEN)))
    ;;
esac

if test ! "$GNU_CXX"; then
    AC_CHECK_LIB(C, demangle)
fi

AC_CHECK_LIB(socket, socket)

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

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

	esac
    LDFLAGS="${_PTHREAD_LDFLAGS} ${LDFLAGS}"
fi


dnl Checks for library functions.
dnl ========================================================
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_CHECK_FUNCS([getc_unlocked _getc_nolock gmtime_r localtime_r pthread_getname_np pthread_get_name_np])

dnl check for clock_gettime(), the CLOCK_MONOTONIC clock
dnl avoid this on Darwin, since depending on your system config, we may think
dnl it exists but it really doesn't
case "$OS_TARGET" in
Darwin)
  ;;
*)
  AC_CACHE_CHECK(for clock_gettime(CLOCK_MONOTONIC),
                 ac_cv_clock_monotonic,
                 [for libs in "" -lrt; do
                      _SAVE_LIBS="$LIBS"
                      LIBS="$LIBS $libs"
                      AC_TRY_LINK([#include <time.h>],
                                   [ struct timespec ts;
                                     clock_gettime(CLOCK_MONOTONIC, &ts); ],
                                   ac_cv_clock_monotonic=$libs
                                   LIBS="$_SAVE_LIBS"
                                   break,
                                   ac_cv_clock_monotonic=no)
                      LIBS="$_SAVE_LIBS"
                  done])
  if test "$ac_cv_clock_monotonic" != "no"; then
      HAVE_CLOCK_MONOTONIC=1
      REALTIME_LIBS=$ac_cv_clock_monotonic
      AC_DEFINE(HAVE_CLOCK_MONOTONIC)
      AC_SUBST(HAVE_CLOCK_MONOTONIC)
      AC_SUBST_LIST(REALTIME_LIBS)
  fi
  ;;
esac

dnl Checks for math functions.
dnl ========================================================
AC_CHECK_LIB(m, sin)
AC_CHECK_LIB(m, sincos, AC_DEFINE(HAVE_SINCOS))
AC_CHECK_LIB(m, __sincos, AC_DEFINE(HAVE___SINCOS))

AC_CACHE_CHECK(
    [for res_ninit()],
    ac_cv_func_res_ninit,
    [if test "$OS_TARGET" = NetBSD -o "$OS_TARGET" = OpenBSD; then
        dnl no need for res_ninit() on NetBSD and OpenBSD
        ac_cv_func_res_ninit=no
     else
       AC_TRY_LINK([
            #ifdef linux
            #define _BSD_SOURCE 1
            #endif
            #include <sys/types.h>
            #include <netinet/in.h>
            #include <arpa/nameser.h>
            #include <resolv.h>
            ],
            [int foo = res_ninit(&_res);],
            [ac_cv_func_res_ninit=yes],
            [ac_cv_func_res_ninit=no])
     fi
    ])

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

AM_LANGINFO_CODESET

AC_LANG_C

dnl **********************
dnl *** va_copy checks ***
dnl **********************
AC_CACHE_CHECK([for an implementation of va_copy()],
               ac_cv_va_copy,
    [AC_TRY_COMPILE([#include <stdarg.h>
                     #include <stdlib.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);
        }],
        [f(0, 42); return 0],
        [ac_cv_va_copy=yes],
        [ac_cv_va_copy=no]
    )]
)
AC_CACHE_CHECK([whether va_list can be copied by value],
               ac_cv_va_val_copy,
    [AC_TRY_COMPILE([#include <stdarg.h>
                     #include <stdlib.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);
        }],
        [f(0, 42); return 0],
        [ac_cv_va_val_copy=yes],
        [ac_cv_va_val_copy=no],
    )]
)
if 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

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

ARM_ABI_PREFIX=
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

  TARGET_COMPILER_ABI="${TARGET_COMPILER_ABI-${ARM_ABI_PREFIX}gcc3}"
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


# 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 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.

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

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

MOZ_CONFIG_NSPR(js)

dnl ========================================================
dnl system zlib Support
dnl ========================================================
dnl Standalone js defaults to system zlib
if test -n "$JS_STANDALONE"; then
    ZLIB_DIR=yes
fi

MOZ_ZLIB_CHECK([1.2.3])

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

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

MOZ_ARG_HEADER(Application)

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

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

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

dnl ========================================================
dnl = Enable code optimization. ON by default.
dnl ========================================================

# Use value from moz.configure if one is defined. Else use our computed
# value.
if test -n "${MOZ_CONFIGURE_OPTIMIZE_FLAGS}"; then
    MOZ_OPTIMIZE_FLAGS=${MOZ_CONFIGURE_OPTIMIZE_FLAGS}
fi

MOZ_SET_FRAMEPTR_FLAGS

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
    if test -n "$MOZ_LTO" -a -n "$CLANG_CC"; then
        # When using llvm-based LTO, non numeric optimization levels are
        # not supported by the linker, so force the linker to use -O2 (
        # which doesn't influence the level compilation units are actually
        # compiled at).
        case " $MOZ_OPTIMIZE_FLAGS " in
        *\ -Os\ *|*\ -Oz\ *)
            MOZ_OPTIMIZE_LDFLAGS="$MOZ_OPTIMIZE_LDFLAGS -O2"
            ;;
        esac
    fi
fi
fi # COMPILE_ENVIRONMENT

AC_SUBST_LIST(MOZ_FRAMEPTR_FLAGS)
AC_SUBST_LIST(MOZ_OPTIMIZE_FLAGS)
AC_SUBST_LIST(MOZ_OPTIMIZE_LDFLAGS)
AC_SUBST_LIST(MOZ_PGO_OPTIMIZE_FLAGS)

dnl ========================================================
dnl = Disable treating compiler warnings as errors
dnl ========================================================
if test -z "$MOZ_ENABLE_WARNINGS_AS_ERRORS"; then
   WARNINGS_AS_ERRORS=''
fi

dnl ========================================================
dnl = Enable jemalloc
dnl ========================================================

if test "$JS_STANDALONE" -a -z "$MOZ_MEMORY"; then
  MOZ_GLUE_IN_PROGRAM=
else
  case "${OS_TARGET}" in
  Android|WINNT|Darwin)
    MOZ_GLUE_IN_PROGRAM=
    ;;
  *)
    dnl On !Android !Windows !OSX, we only want to link executables against mozglue
    MOZ_GLUE_IN_PROGRAM=1
    AC_DEFINE(MOZ_GLUE_IN_PROGRAM)
    ;;
  esac
fi

if test "$MOZ_MEMORY"; then
  dnl The generic feature tests that determine how to compute ncpus are long and
  dnl complicated.  Therefore, simply define special cpp variables for the
  dnl platforms we have special knowledge of.
  case "${target}" in
  *-mingw*)
    export MOZ_NO_DEBUG_RTL=1
    ;;
  esac
fi
AC_SUBST(MOZ_GLUE_IN_PROGRAM)
AC_SUBST_LIST(MOZ_GLUE_WRAP_LDFLAGS)

dnl ========================================================
dnl instruments
dnl ========================================================
if test -n "$MOZ_INSTRUMENTS"; then
    LIBS="$LIBS -framework CoreFoundation"
fi

dnl ========================================================
dnl Debug (see Bug 939505)
dnl ========================================================
if test -n "$MOZ_DEBUG"; then
    AC_DEFINE(JS_DEBUG)
fi

dnl ========================================================
dnl = Enable using the clang plugin to build
dnl ========================================================

if test -n "$COMPILE_ENVIRONMENT"; then
MOZ_CONFIG_CLANG_PLUGIN
fi # COMPILE_ENVIRONMENT

dnl ========================================================
dnl = Enable static checking using sixgill
dnl ========================================================

MOZ_ARG_WITH_STRING(sixgill,
[  --with-sixgill=path/to/sixgill
                          Enable static checking of code using sixgill],
    SIXGILL_PATH=$withval,
    SIXGILL_PATH= )

if test -n "$SIXGILL_PATH"; then
    if test ! -x "$SIXGILL_PATH/bin/xdbfind" || test ! -f "$SIXGILL_PATH/gcc/xgill.so" || test ! -x "$SIXGILL_PATH/scripts/wrap_gcc/g++"; then
        AC_MSG_ERROR([The sixgill plugin and binaries are not at the specified path.])
    fi
fi
AC_SUBST(SIXGILL_PATH)

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

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

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

dnl ========================================================
dnl = Support for 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

dnl ========================================================
dnl JIT observers
dnl ========================================================

MOZ_ARG_WITH_STRING(jitreport-granularity,
[  --jitreport-granularity=N
                           Default granularity at which to report JIT code
                           to external tools
                             0 - no info
                             1 - code ranges for whole functions only
                             2 - per-line information
                             3 - per-op information],
  JITREPORT_GRANULARITY=$withval,
  JITREPORT_GRANULARITY=3)

AC_DEFINE_UNQUOTED(JS_DEFAULT_JITREPORT_GRANULARITY, $JITREPORT_GRANULARITY)

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

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 -pipe support])
if test -n "$GNU_CC" -a -n "$GNU_CXX"; then
    dnl Any gcc that supports firefox supports -pipe.
    CFLAGS="$CFLAGS -pipe"
    CXXFLAGS="$CXXFLAGS -pipe"
    AC_MSG_RESULT([yes])
else
    AC_MSG_RESULT([no])
fi

AC_LANG_CPLUSPLUS

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

AC_DEFINE(CPP_THROW_NEW, [throw()])
AC_LANG_C

MOZ_EXPAND_LIBS

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

JS_BUNDLED_EDITLINE=
EDITLINE_LIBS=

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

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

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

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

dnl ========================================================
dnl =
dnl = Options for generating the shell as a script
dnl =
dnl ========================================================

MOZ_ARG_WITH_STRING(qemu-exe,
[  --with-qemu-exe=path   Use path as an arm emulator on host platforms],
    QEMU_EXE=$withval)
AC_SUBST(QEMU_EXE)
MOZ_ARG_WITH_STRING(cross-lib,
[  --with-cross-lib=dir   Use dir as the location for arm libraries],
    CROSS_LIB=$withval,
    CROSS_LIB=/usr/$target)
AC_SUBST(CROSS_LIB)
dnl ========================================================
dnl =
dnl = Maintainer debug option (no --enable equivalent)
dnl =
dnl ========================================================

AC_SUBST(AR)
AC_SUBST(AR_FLAGS)
AC_SUBST(AR_EXTRACT)
AC_SUBST(NM)
AC_SUBST_LIST(ASFLAGS)
AC_SUBST(RC)
AC_SUBST(RCFLAGS)
AC_SUBST(WINDRES)
AC_SUBST(IMPLIB)
AC_SUBST(FILTER)
AC_SUBST_LIST(MOZ_DEBUG_LDFLAGS)
AC_SUBST(WARNINGS_AS_ERRORS)
AC_SUBST_LIST(WARNINGS_CFLAGS)
AC_SUBST(LIBICONV)

AC_SUBST(ENABLE_STRIP)
AC_SUBST(PKG_SKIP_STRIP)
AC_SUBST(INCREMENTAL_LINKER)

AC_SUBST_LIST(MOZ_FIX_LINK_PATHS)

AC_SUBST(MOZ_POST_PROGRAM_COMMAND)

AC_SUBST(MOZ_APP_NAME)
AC_SUBST(MOZ_APP_DISPLAYNAME)

AC_SUBST(MOZ_PKG_SPECIAL)

dnl ========================================================
dnl ECMAScript Internationalization API Support (uses ICU)
dnl ========================================================

dnl top-level configure may override this with --without-intl-api
_INTL_API=yes

MOZ_CONFIG_ICU()

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

CXXFLAGS=`echo \
	$_WARNINGS_CXXFLAGS \
	$_COMPILATION_CXXFLAGS \
	$CXXFLAGS`

COMPILE_CFLAGS=`echo \
    $_DEFINES_CFLAGS \
    $COMPILE_CFLAGS`

COMPILE_CXXFLAGS=`echo \
    $_DEFINES_CXXFLAGS \
    $COMPILE_CXXFLAGS`

HOST_CFLAGS=`echo \
    $_WARNINGS_HOST_CFLAGS \
    $_COMPILATION_HOST_CFLAGS \
    $HOST_CFLAGS`

HOST_CXXFLAGS=`echo \
    $_WARNINGS_HOST_CXXFLAGS \
    $_COMPILATION_HOST_CXXFLAGS \
    $HOST_CXXFLAGS`

AC_SUBST(MOZ_SYSTEM_NSPR)

OS_CFLAGS="$CFLAGS"
OS_CXXFLAGS="$CXXFLAGS"
OS_CPPFLAGS="$CPPFLAGS"
OS_COMPILE_CFLAGS="$COMPILE_CFLAGS"
OS_COMPILE_CXXFLAGS="$COMPILE_CXXFLAGS"
OS_LDFLAGS="$LDFLAGS"
OS_LIBS="$LIBS"
AC_SUBST_LIST(OS_CFLAGS)
AC_SUBST_LIST(OS_CXXFLAGS)
AC_SUBST_LIST(OS_CPPFLAGS)
AC_SUBST_LIST(OS_COMPILE_CFLAGS)
AC_SUBST_LIST(OS_COMPILE_CXXFLAGS)
AC_SUBST_LIST(OS_LDFLAGS)
AC_SUBST(OS_LIBS)

AC_SUBST(HOST_CC)
AC_SUBST(HOST_CXX)
AC_SUBST_LIST(HOST_CFLAGS)
AC_SUBST_LIST(HOST_CPPFLAGS)
AC_SUBST_LIST(HOST_CXXFLAGS)
AC_SUBST(HOST_LDFLAGS)
AC_SUBST_LIST(HOST_OPTIMIZE_FLAGS)
AC_SUBST(HOST_AR)
AC_SUBST(HOST_AR_FLAGS)
AC_SUBST(HOST_RANLIB)
AC_SUBST(HOST_BIN_SUFFIX)

AC_SUBST(TARGET_XPCOM_ABI)

AC_SUBST_LIST(DSO_CFLAGS)
AC_SUBST_LIST(DSO_PIC_CFLAGS)
AC_SUBST(DSO_LDOPTS)
AC_SUBST(BIN_SUFFIX)
AC_SUBST(USE_N32)
AC_SUBST(CC_VERSION)
AC_SUBST(MOZ_LINKER)
AC_SUBST(WIN32_CONSOLE_EXE_LDFLAGS)
AC_SUBST(WIN32_GUI_EXE_LDFLAGS)

AC_CHECK_FUNCS(posix_fadvise posix_fallocate)

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

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

# Allow influencing configure with a defines.sh script.
. "${srcdir}/build/defines.sh"

# If we're not building a release build, define EARLY_BETA_OR_EARLIER if it is
# set in defines.sh
if test "$BUILDING_RELEASE"; then
  # Override value in defines.sh, if any
  EARLY_BETA_OR_EARLIER=
elif test "$EARLY_BETA_OR_EARLIER"; then
  AC_DEFINE(EARLY_BETA_OR_EARLIER)
fi
AC_SUBST(EARLY_BETA_OR_EARLIER)

BINDGEN_SYSTEM_FLAGS="$_BINDGEN_CFLAGS $NSPR_CFLAGS"
AC_SUBST(BINDGEN_SYSTEM_FLAGS)

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

MOZ_CHECK_ALLOCATOR

AC_CHECK_FUNCS(localeconv)

AC_SUBST(ac_configure_args)

if test -n "$JS_STANDALONE"; then
MOZ_APP_NAME="mozjs"
JS_LIBRARY_NAME="mozjs-$MOZILLA_SYMBOLVERSION"
else
JS_LIBRARY_NAME="mozjs"
fi
JS_CONFIG_LIBS="$NSPR_LIBS $LIBS"
if test -n "$GNU_CC"; then
JS_CONFIG_MOZ_JS_LIBS='-L${libdir} -l${JS_LIBRARY_NAME}'
else
JS_CONFIG_MOZ_JS_LIBS='${libdir}/${JS_LIBRARY_NAME}.lib'
fi
AC_SUBST(JS_LIBRARY_NAME)
AC_SUBST(JS_CONFIG_MOZ_JS_LIBS)
AC_SUBST(JS_CONFIG_LIBS)

# Avoid using obsolete NSPR features
AC_DEFINE(NO_NSPR_10_SUPPORT)

dnl Spit out some output
dnl ========================================================
MOZ_CREATE_CONFIG_STATUS()

if test "$JS_STANDALONE"; then
  MOZ_RUN_ALL_SUBCONFIGURES()
fi

rm -fr confdefs* $ac_clean_files