build/tools/build-mingw64-toolchain.sh - platform/ndk - Git at Google

 #!/bin/sh
 #
 # Copyright (C) 2012 The Android Open Source Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
 # Rebuild the mingw64 cross-toolchain from scratch
 #
 # Sample (recommended for compatibility reasons) command line:
 #
 # GOOGLE_PREBUILT=<some folder>
 # git clone https://android.googlesource.com/platform/prebuilt $GOOGLE_PREBUILT
 # export PATH=$GOOGLE_PREBUILT/linux-x86/toolchain/i686-linux-glibc2.7-4.4.3/bin:$PATH
 # build-mingw64-toolchain.sh --target-arch=i686                       \
 #                            --package-dir=i686-w64-mingw32-toolchain \
 #                            --binprefix=i686-linux
 #

 PROGNAME=$(basename $0)
 PROGDIR=$(dirname $0)
 PROGDIR=$(cd $PROGDIR && pwd)

 HELP=
 VERBOSE=1

 # This will be reset later.
 LOG_FILE=/dev/null

 panic ()
 {
     1>&2 echo "Error: $@"
     exit 1
 }

 fail_panic ()
 {
     if [ $? != 0 ]; then
         panic "$@"
     fi
 }

 var_value ()
 {
     eval echo \"$1\"
 }

 var_append ()
 {
     local _varname=$1
     local _varval=$(var_value $_varname)
     shift
     if [ -z "$_varval" ]; then
         eval $_varname=\"$*\"
     else
         eval $_varname=\$$_varname\" $*\"
     fi
 }

 run ()
 {
     if [ "$VERBOSE" -gt 0 ]; then
         echo "COMMAND: >>>> $@" >> $LOG_FILE
     fi
     if [ "$VERBOSE" -gt 1 ]; then
         echo "COMMAND: >>>> $@"
     fi
     if [ "$VERBOSE" -gt 1 ]; then
         "$@"
     else
        "$@" > /dev/null 2>&1
     fi
 }

 log ()
 {
     if [ "$LOG_FILE" ]; then
         echo "$@" >> $LOG_FILE
     fi
     if [ "$VERBOSE" -gt 0 ]; then
         echo "$@"
     fi
 }

 # For now, only tested on Linux
 OS=$(uname -s)
 EXEEXT= # executable extension
 case $OS in
     Linux) OS=linux;;
     Darwin) OS=darwin;;
     CYGWIN*|*_NT-*) OS=windows;
         if [ "$OSTYPE" = cygwgin ]; then
             OS=cygwin
         fi
         EXEEXT=.exe
         ;;
 esac

 ARCH=$(uname -m)
 case $ARCH in
     i?86) ARCH=i686;;
     amd64) ARCH=x86_64;;
 esac

 case $OS in
     linux)
         NUM_CORES=$(grep -c -e '^processor' /proc/cpuinfo)
         ;;
     darwin|freebsd)
         NUM_CORES=`sysctl -n hw.ncpu`
         ;;
     windows|cygwin)
         NUM_CORES=$NUMBER_OF_PROCESSORS
         ;;
     *)  # let's play safe here
         NUM_CORES=1
         ;;
 esac

 # Warn our users, because the script probably fails on anything but Linux
 # at that point (e.g. there are strange libtool build breakages on darwin).
 if [ "$OS" != "linux" ]; then
     echo "WARNING: WARNING: WARNING: THIS SCRIPT PROBABLY ONLY WORKS ON LINUX!!"
 fi

 # GMP moving home?
 # GMP_VERSION=5.1.0
 # GMP_URL=ftp://ftp.gmplib.org/pub/gmp-$GMP_VERSION/
 # ..but the old one is still there:
 GMP_VERSION=5.0.5
 GMP_URL=http://ftp.gnu.org/gnu/gmp/

 MPFR_VERSION=3.1.1
 MPC_VERSION=1.0.1
 BINUTILS_VERSION=2.22
 GCC_VERSION=4.7.2

 # Need at least revision 5166
 # For reference, I've built a working NDK with 5445
 # (latest as of Sun Feb 3 2013 is 5578)
 MINGW_W64_VERSION=svn@5166

 JOBS=$(( $NUM_CORES * 2 ))


 HOST_BINPREFIX=
 TARGET_ARCH=x86_64
 TARGET_MULTILIBS=true  # not empty to enable multilib
 PACKAGE_DIR=
 FORCE_ALL=
 FORCE_BUILD=
 CLEANUP=

 TEMP_DIR=/tmp/build-mingw64-toolchain-$USER

 for opt; do
     optarg=`expr "x$opt" : 'x[^=]*=\(.*\)'`
     case $opt in
         -h|-?|--help) HELP=true;;
         --verbose) VERBOSE=$(( $VERBOSE + 1 ));;
         --quiet) VERBOSE=$(( $VERBOSE - 1 ));;
         --binprefix=*) HOST_BINPREFIX=$optarg;;
         -j*|--jobs=*) JOBS=$optarg;;
         --target-arch=*) TARGET_ARCH=$optarg;;
         --no-multilib) TARGET_MULTILIBS="";;
         --force-build) FORCE_BUILD=true;;
         --force-all) FORCE_ALL=true;;
         --work-dir=*) TEMP_DIR=$optarg;;
         --package-dir=*) PACKAGE_DIR=$optarg;;
         --cleanup) CLEANUP=true;;
         --gcc-version=*) GCC_VERSION=$optarg;;
         --binutils-version=*) BINUTILS_VERSION=$optarg;;
         --gmp-version=*) GMP_VERSION=$optarg;;
         --mpfr-version=*) MPFR_VERSION=$optarg;;
         --mpc-version=*) MPC_VERSION=$optarg;;
         --mingw-version=*) MINGW_W64_VERSION=$optarg;;
         -*) panic "Unknown option '$opt', see --help for list of valid ones.";;
         *) panic "This script doesn't take any parameter, see --help for details.";;
     esac
 done


 if [ "$HELP" ]; then
     echo "Usage: $PROGNAME [options]"
     echo ""
     echo "This program is used to rebuild a mingw64 cross-toolchain from scratch."
     echo ""
     echo "Valid options:"
     echo "  -h|-?|--help                 Print this message."
     echo "  --verbose                    Increase verbosity."
     echo "  --quiet                      Decrease verbosity."
     echo "  --gcc-version=<version>      Select gcc version [$GCC_VERSION]."
     echo "  --binutil-version=<version>  Select binutils version [$BINUTILS_VERSION]."
     echo "  --gmp-version=<version>      Select libgmp version [$GMP_VERSION]."
     echo "  --mpfr-version=<version>     Select libmpfr version [$MPFR_VERSION]."
     echo "  --mpc-version=<version>      Select libmpc version [$MPC_VERSION]."
     echo "  --mingw-version=<version>    Select mingw-w64 version [$MINGW_W64_VERSION]."
     echo "  --jobs=<num>                 Run <num> build tasks in parallel [$JOBS]."
     echo "  -j<num>                      Same as --jobs=<num>."
     echo "  --binprefix=<prefix>         Specify bin prefix for host toolchain."
     echo "  --no-multilib                Disable multilib toolchain build."
     echo "  --target-arch=<arch>         Select default target architecture [$TARGET_ARCH]."
     echo "  --force-all                  Redo everything from scratch."
     echo "  --force-build                Force a rebuild (keep sources)."
     echo "  --cleanup                    Remove all temp files after build."
     echo "  --work-dir=<path>            Specify work/build directory [$TEMP_DIR]."
     echo "  --package-dir=<path>         Package toolchain to directory."
     echo ""
     exit 0
 fi

 if [ "$CLEANUP" ]; then
     if [ -z "$PACKAGE_DIR" ]; then
         panic "You should only use --cleanup with --package-dir=<path> !".
     fi
 fi

 BUILD_TAG64=x86_64-linux-gnu
 BUILD_TAG32=i686-linux-gnu

 # We don't want debug executables
 BUILD_CFLAGS="-O2 -fomit-frame-pointer -s"
 BUILD_LDFLAGS=""

 # On Darwin, we want to use the 10.4 / 10.5 / 10.6 SDKs to generate binaries
 # that work on "old" platform releases.
 if [ "$OS" = darwin ]; then
     # Use the check for the availability of a compatibility SDK in Darwin
     # this can be used to generate binaries compatible with either Tiger or
     # Leopard.
     #
     # $1: SDK root path
     # $2: MacOS X minimum version (e.g. 10.4)
     check_darwin_sdk ()
     {
         if [ -d "$1" ] ; then
             var_append BUILD_CFLAGS "-isysroot $1 -mmacosx-version-min=$2 -DMAXOSX_DEPLOYEMENT_TARGET=$2"
             var_append BUILD_LDFLAGS "-Wl,-syslibroot,$sdk -mmacosx-version-min=$2"
             return 0  # success
         fi
         return 1
     }

     if check_darwin_sdk /Developer/SDKs/MacOSX10.4.sdku 10.4; then
         log "Generating Tiger-compatible binaries!"
     elif check_darwin_sdk /Developer/SDKs/MacOSX10.5.sdk 10.5; then
         log "Generating Leopard-compatible binaries!"
     elif check_darwin_sdk /Developer/SDKs/MacOSX10.6.sdk 10.6; then
         log "Generating Snow Leopard-compatible binaries!"
     else
         osx_version=`sw_vers -productVersion`
         log "Generating $osx_version-compatible binaries!"
     fi
 fi

 mkdir -p $TEMP_DIR
 if [ "$FORCE_ALL" ]; then
     log "Cleaning up work directory..."
     rm -rf $TEMP_DIR/*
 fi

 LOG_FILE=$TEMP_DIR/build.log
 rm -f $LOG_FILE && touch $LOG_FILE
 if [ "$VERBOSE" -eq 1 ]; then
     echo  "To follow build, use in another terminal: tail -F $LOG_FILE"
 fi

 case $TARGET_ARCH in
     x86_64) TARGET_BITS=64;;
     i686) TARGET_BITS=32;;
     *) panic "Invalid --target parameter. Valid values are: x86_64 i686";;
 esac
 TARGET_TAG=$TARGET_ARCH-w64-mingw32
 log "Target arch: $TARGET_TAG"
 log "Target bits: $TARGET_BITS"

 # Determine bitness of host architecture
 PROBE_CC=${CC:-gcc}
 if [ -n "$HOST_BINPREFIX" ]; then
     # If $HOST_BINPREFIX is a directory but not ends with '/', append '/'.
     # Otherwise, append '-'.
     if [ -d "$HOST_BINPREFIX" ] ; then
         if [ -n "${HOST_BINPREFIX##*/}" ] ; then
 	    HOST_BINPREFIX="${HOST_BINPREFIX}/"
 	fi
     else
         HOST_BINPREFIX="${HOST_BINPREFIX}-"
     fi
     PROBE_CC=${HOST_BINPREFIX}gcc
 fi
 echo "Using GCC: $PROBE_CC"
 echo "int main() { return 0; }" > $TEMP_DIR/test-host-cc.c
 $PROBE_CC -c $TEMP_DIR/test-host-cc.c -o $TEMP_DIR/test-host-cc.o > /dev/null
 fail_panic "Host compiler doesn't work: $PROBE_CC"

 file $TEMP_DIR/test-host-cc.o | grep -q -e "x86[_-]64"
 if [ $? != 0 ]; then
     log "Host compiler generates 32-bit code: $PROBE_CC"
     HOST_ARCH=i686
     HOST_BITS=32
 else
     log "Host compiler generates 64-bit code: $PROBE_CC"
     HOST_ARCH=x86_64
     HOST_BITS=64
 fi

 case $OS in
     linux) HOST_TAG=$HOST_ARCH-linux-gnu;;
     darwin) HOST_TAG=$HOST_ARCH-apple-darwinx11;;
     cygwin) HOST_TAG=$HOST_ARCH-pc-cygwin;;
     *) panic "Unsupported host operating system!"
 esac
 log "Host arch: $HOST_TAG"

 download_package ()
 {
     # Assume the packages are already downloaded under $ARCHIVE_DIR
     local PKG_URL=$1
     local PKG_NAME=$(basename $PKG_URL)

     case $PKG_NAME in
         *.tar.bz2)
             PKG_BASENAME=${PKG_NAME%%.tar.bz2}
             ;;
         *.tar.gz)
             PKG_BASENAME=${PKG_NAME%%.tar.gz}
             ;;
         *)
             panic "Unknown archive type: $PKG_NAME"
     esac

     if [ ! -f "$ARCHIVE_DIR/$PKG_NAME" ]; then
         log "Downloading $PKG_URL..."
         (cd $ARCHIVE_DIR && run curl -L -o "$PKG_NAME" "$PKG_URL")
         fail_panic "Can't download '$PKG_URL'"
     fi

     MD5SUM=$(md5sum $ARCHIVE_DIR/$PKG_NAME | cut -d" " -f1)
     echo "$MD5SUM  $PKG_URL" >> $INSTALL_DIR/README

     if [ ! -d "$SRC_DIR/$PKG_BASENAME" ]; then
         log "Uncompressing $PKG_URL into $SRC_DIR"
         case $PKG_NAME in
             *.tar.bz2)
                 run tar xjf $ARCHIVE_DIR/$PKG_NAME -C $SRC_DIR
                 ;;
             *.tar.gz)
                 run tar xzf $ARCHIVE_DIR/$PKG_NAME -C $SRC_DIR
                 ;;
             *)
                 panic "Unknown archive type: $PKG_NAME"
                 ;;
         esac
         fail_panic "Can't uncompress $ARCHIVE_DIR/$PKG_NAME"
     fi
 }

 # Download and unpack source packages from official sites
 ARCHIVE_DIR=$TEMP_DIR/archive
 SRC_DIR=$TEMP_DIR/src
 STAMP_DIR=$TEMP_DIR/timestamps

 mkdir -p $ARCHIVE_DIR
 mkdir -p $SRC_DIR
 mkdir -p $STAMP_DIR

 INSTALL_DIR=$TEMP_DIR/install-$HOST_TAG/$TARGET_TAG
 BUILD_DIR=$TEMP_DIR/build-$HOST_TAG

 if [ "$FORCE_BUILD" ]; then
     rm -f $STAMP_DIR/*
     rm -rf $INSTALL_DIR
     rm -rf $BUILD_DIR
 fi

 # Make temp install directory
 mkdir -p $INSTALL_DIR
 mkdir -p $BUILD_DIR

 # Copy this script
 cp $0 $INSTALL_DIR/ &&
 echo "This file has been automatically generated on $(date) with the following command:" > $INSTALL_DIR/README &&
 echo "$PROGNAME $@" >> $INSTALL_DIR/README &&
 echo "" >> $INSTALL_DIR/README &&
 echo "The MD5 hashes for the original sources packages are:" >> $INSTALL_DIR/README
 fail_panic "Could not copy script to installation directory."

 download_package ${GMP_URL}gmp-${GMP_VERSION}.tar.bz2
 download_package http://ftp.gnu.org/gnu/mpfr/mpfr-$MPFR_VERSION.tar.bz2
 download_package http://www.multiprecision.org/mpc/download/mpc-$MPC_VERSION.tar.gz
 download_package http://ftp.gnu.org/gnu/binutils/binutils-$BINUTILS_VERSION.tar.bz2
 download_package http://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/gcc-$GCC_VERSION.tar.bz2

 PREFIX_FOR_TARGET=$INSTALL_DIR/$TARGET_TAG
 WITH_WIDL=$INSTALL_DIR/bin
 MINGW_W64_REVISION=
 MINGW_W64_VERSION_NO_REV=$(echo $MINGW_W64_VERSION | awk 'BEGIN { FS="@" }; { print $1 }')
 if [ "$MINGW_W64_VERSION_NO_REV" = "svn" ];  then
     MINGW_W64_REVISION=$(echo $MINGW_W64_VERSION | awk 'BEGIN { FS="@" }; { print $2 }')
     if [ ! -z "$MINGW_W64_REVISION" ] ; then
         if [ $MINGW_W64_REVISION -lt 5186 ] ; then
             PREFIX_FOR_TARGET=$INSTALL_DIR
         fi
         if [ $MINGW_W64_REVISION -lt 5252 ] ; then
             WITH_WIDL=mingw-w64-widl
         elif [ $MINGW_W64_REVISION -lt 5258 ] ; then
             WITH_WIDL=$TARGET_TAG-widl
         fi
         MINGW_W64_REVISION2=-r$MINGW_W64_REVISION
         MINGW_W64_REVISION=@${MINGW_W64_REVISION}
     fi
     MINGW_W64_SRC=$SRC_DIR/mingw-w64-svn$MINGW_W64_REVISION2
     MINGW_W64_VERSION=svn
 fi

 if [ -z "$MINGW_W64_REVISION" ] ; then
     # Released versions of MinGW-w64 don't provide easily accessible information
     # about the svn revision which this script needs to know.
     fail_panic "Building MinGW-w64 toolchain requires specifying an svn version"
 fi

 if [ ! -d $MINGW_W64_SRC ]; then
     echo "Checking out https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk$MINGW_W64_REVISION $MINGW_W64_SRC"
     run svn co https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk$MINGW_W64_REVISION $MINGW_W64_SRC
 fi

 PATCHES_DIR="$PROGDIR/toolchain-patches-host/mingw-w64"
 if [ -d "$PATCHES_DIR" ] ; then
     PATCHES=$(find "$PATCHES_DIR" -name "*.patch" | sort)
     for PATCH in $PATCHES; do
         echo "Patching mingw-w64-$MINGW_W64_REVISION with $PATCH"
         (cd $MINGW_W64_SRC && run patch -p0 < $PATCH)
     done
 fi

 # Let's generate the licenses/ directory
 LICENSES_DIR=$INSTALL_DIR/licenses/
 mkdir -p $LICENSES_DIR
 if [ ! -f $STAMP_DIR/licenses ]; then
     LICENSE_FILES=$(cd $SRC_DIR && find . -name "COPYING*")
     # Copy all license files to $LICENSES_DIR
     (tar cf - -C $SRC_DIR $LICENSE_FILES) | (tar xf - -C $LICENSES_DIR)
     touch $STAMP_DIR/licenses
 fi

 setup_build_env ()
 {
     local BINPREFIX=$1

     if [ "$BINPREFIX" ]; then
         CC=${BINPREFIX}gcc
         CXX=${BINPREFIX}g++
         LD=${BINPREFIX}ld
         AS=${BINPREFIX}as
         AR=${BINPREFIX}ar
         RANLIB=${BINPREFIX}ranlib
         STRIP=${BINPREFIX}strip
         export CC CXX LD AS AR RANLIB STRIP
     elif [ "$OS" = darwin ]; then
         # Needed on OS X otherwise libtool will try to use gcc and $BUILD_CFLAGS
         LD=ld
     fi

     export CFLAGS="$BUILD_CFLAGS"
     export CXXFLAGS="$BUILD_CFLAGS"
     export LDFLAGS="$BUILD_LDFLAGS"
 }

 setup_install_env ()
 {
     export PATH=$INSTALL_DIR/bin:$PATH
 }

 build_host_package ()
 {
     local PKGNAME=$1
     shift

     if [ ! -f $STAMP_DIR/$PKGNAME ]; then
         (
             mkdir -p $BUILD_DIR/$PKGNAME &&
             cd $BUILD_DIR/$PKGNAME &&
             setup_build_env $HOST_BINPREFIX &&
             log "$PKGNAME: Configuring" &&
             run $SRC_DIR/$PKGNAME/configure "$@"
             fail_panic "Can't configure $PKGNAME !!"

             log "$PKGNAME: Building" &&
             run make -j$JOBS
             fail_panic "Can't build $PKGNAME !!"

             log "$PKGNAME: Installing" &&
             run make install
             fail_panic "Can't install $PKGNAME"
         ) || exit 1
         touch $STAMP_DIR/$PKGNAME
     fi
 }

 export ABI=$HOST_BITS
 BASE_HOST_OPTIONS="--prefix=$INSTALL_DIR --disable-shared"
 build_host_package gmp-$GMP_VERSION $BASE_HOST_OPTIONS
 var_append BASE_HOST_OPTIONS "--with-gmp=$INSTALL_DIR"

 build_host_package mpfr-$MPFR_VERSION $BASE_HOST_OPTIONS
 var_append BASE_HOST_OPTIONS "--with-mpfr=$INSTALL_DIR"

 build_host_package mpc-$MPC_VERSION $BASE_HOST_OPTIONS
 var_append BASE_HOST_OPTIONS "--with-mpc=$INSTALL_DIR"

 BINUTILS_CONFIGURE_OPTIONS=$BASE_HOST_OPTIONS
 var_append BINUTILS_CONFIGURE_OPTIONS "--target=$TARGET_TAG --disable-nls"
 if [ "$TARGET_MULTILIBS" ]; then
     var_append BINUTILS_CONFIGURE_OPTIONS "--enable-targets=x86_64-w64-mingw32,i686-w64-mingw32"
 fi

 var_append BINUTILS_CONFIGURE_OPTIONS "--with-sysroot=$INSTALL_DIR"

 build_host_package binutils-$BINUTILS_VERSION $BINUTILS_CONFIGURE_OPTIONS

 build_mingw_tools ()
 {
     local PKGNAME=$1
     echo "$STAMP_DIR/$PKGNAME"
     if [ ! -f "$STAMP_DIR/$PKGNAME" ]; then
         (
             mkdir -p $BUILD_DIR/$PKGNAME &&
             cd $BUILD_DIR/$PKGNAME &&
             log "$PKGNAME: Configuring" &&
             run $MINGW_W64_SRC/mingw-w64-tools/widl/configure --prefix=$INSTALL_DIR --target=$TARGET_TAG
             fail_panic "Can't configure mingw-64-tools"
             log "$PKGNAME: Installing" &&
             run make install -j$JOBS
         ) || exit 1
         touch $STAMP_DIR/$PKGNAME
     fi
 }

 # Install the right mingw64 headers into the sysroot
 build_mingw_headers ()
 {
     local PKGNAME=$1
     if [ ! -f "$STAMP_DIR/$PKGNAME" ]; then
         (
             # If --with-widl only identifies the program name (svn version dependent)...
             if [ $(basename "$WITH_WIDL") = "$WITH_WIDL" ] ; then
                 # ...then need to add the right path too.
                 export PATH=$PATH:$INSTALL_DIR/bin
             fi
             fail_panic "Can't find widl"
             mkdir -p $BUILD_DIR/$PKGNAME &&
             cd $BUILD_DIR/$PKGNAME &&
             log "$PKGNAME: Configuring" &&
             run $MINGW_W64_SRC/mingw-w64-headers/configure --prefix=$PREFIX_FOR_TARGET --host=$TARGET_TAG \
                 --build=$HOST_TAG --with-widl=$WITH_WIDL --enable-sdk=all
             fail_panic "Can't configure mingw-64-headers"

             run make
             log "$PKGNAME: Installing" &&
             run make install -j$JOBS &&
             run cd $INSTALL_DIR &&
             run ln -s $TARGET_TAG mingw &&
             run cd $INSTALL_DIR/mingw &&
             run ln -s lib lib$TARGET_BITS
             fail_panic "Can't configure mingw-64-headers"
         ) || exit 1
         touch $STAMP_DIR/$PKGNAME
     fi
 }

 # Slightly different from build_host_package because we need to call
 # 'make all-gcc' and 'make install-gcc' as a special case.
 #
 build_core_gcc ()
 {
     local PKGNAME=$1
     shift

     if [ ! -f "$STAMP_DIR/core-$PKGNAME" ]; then
         (
             mkdir -p $BUILD_DIR/$PKGNAME &&
             cd $BUILD_DIR/$PKGNAME &&
             setup_build_env $HOST_BINPREFIX &&
             log "core-$PKGNAME: Configuring" &&
             run $SRC_DIR/$PKGNAME/configure "$@"
             fail_panic "Can't configure $PKGNAME !!"

             log "core-$PKGNAME: Building" &&
             run make -j$JOBS all-gcc
             fail_panic "Can't build $PKGNAME !!"

             log "core-$PKGNAME: Installing" &&
             run make -j$JOBS install-gcc
             fail_panic "Can't install $PKGNAME"
         ) || exit 1
         touch $STAMP_DIR/core-$PKGNAME
     fi
 }


 # Build and install the C runtime files needed by the toolchain
 build_mingw_crt ()
 {
     local PKGNAME=$1
     shift

     if [ ! -f $STAMP_DIR/$PKGNAME ]; then
         (
             mkdir -p $BUILD_DIR/$PKGNAME &&
             cd $BUILD_DIR/$PKGNAME &&
             export PATH=$INSTALL_DIR/bin:$PATH
             log "$PKGNAME: Configuring" &&
             run $MINGW_W64_SRC/mingw-w64-crt/configure "$@"
             fail_panic "Can't configure $PKGNAME !!"

             log "$PKGNAME: Building" &&
             run make -j$JOBS
             fail_panic "Can't build $PKGNAME !!"

             log "$PKGNAME: Installing" &&
             run make -j$JOBS install
             fail_panic "Can't install $PKGNAME"
         ) || exit 1
         touch $STAMP_DIR/$PKGNAME
     fi
 }


 build_libgcc ()
 {
     local PKGNAME=$1
     shift

     if [ ! -f "$STAMP_DIR/libgcc-$PKGNAME" ]; then
         (
             # No configure step here! We're resuming work that was started
             # in build_core_gcc.
             cd $BUILD_DIR/$PKGNAME &&
             setup_build_env $HOST_BINPREFIX &&
             log "libgcc-$PKGNAME: Building" &&
             run make -j$JOBS
             fail_panic "Can't build libgcc-$PKGNAME !!"

             log "libgcc-$PKGNAME: Installing" &&
             run make -j$JOBS install
             fail_panic "Can't install libgcc-$PKGNAME"
         ) || exit 1

         touch "$STAMP_DIR/libgcc-$PKGNAME"
     fi
 }

 GCC_CONFIGURE_OPTIONS=$BASE_HOST_OPTIONS
 var_append GCC_CONFIGURE_OPTIONS "--target=$TARGET_TAG"
 if [ "$TARGET_MULTILIBS" ]; then
     var_append GCC_CONFIGURE_OPTIONS "--enable-targets=all"
 fi
 var_append GCC_CONFIGURE_OPTIONS "--enable-languages=c,c++"
 var_append GCC_CONFIGURE_OPTIONS "--with-sysroot=$INSTALL_DIR"

 # A bug in MinGW-w64 forces us to build and use widl.
 build_mingw_tools mingw-w64-tools
 build_mingw_headers mingw-w64-headers

 build_core_gcc gcc-$GCC_VERSION $GCC_CONFIGURE_OPTIONS

 CRT_CONFIGURE_OPTIONS="--host=$TARGET_TAG --with-sysroot=$INSTALL_DIR --prefix=$PREFIX_FOR_TARGET"
 if [ "$TARGET_MULTILIBS" ]; then
     var_append CRT_CONFIGURE_OPTIONS "--enable-lib32"
 fi

 build_mingw_crt mingw-w64-crt $CRT_CONFIGURE_OPTIONS

 build_libgcc gcc-$GCC_VERSION

 if [ "$PACKAGE_DIR" ]; then
     mkdir -p $PACKAGE_DIR
     fail_panic "Could not create packaging directory: $PACKAGE_DIR"
     PACKAGE_NAME=$PACKAGE_DIR/$TARGET_TAG-$OS-$HOST_ARCH.tar.bz2
     log "Packaging $TARGET_TAG toolchain to $PACKAGE_NAME"
     run tar cjf $PACKAGE_NAME -C $(dirname $INSTALL_DIR) $TARGET_TAG/
     fail_panic "Could not package $TARGET_TAG toolchain!"
     log "Done. See $PACKAGE_DIR:"
     ls -l $PACKAGE_NAME
 else
     log "Done. See: $INSTALL_DIR"
 fi

 if [ "$CLEANUP" ]; then
     log "Cleaning up..."
     rm -rf $TEMP_DIR/*
 fi

 exit 0
	#!/bin/sh
	#
	# Copyright (C) 2012 The Android Open Source Project
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	#
	# Rebuild the mingw64 cross-toolchain from scratch
	#
	# Sample (recommended for compatibility reasons) command line:
	#
	# GOOGLE_PREBUILT=<some folder>
	# git clone https://android.googlesource.com/platform/prebuilt $GOOGLE_PREBUILT
	# export PATH=$GOOGLE_PREBUILT/linux-x86/toolchain/i686-linux-glibc2.7-4.4.3/bin:$PATH
	# build-mingw64-toolchain.sh --target-arch=i686 \
	# --package-dir=i686-w64-mingw32-toolchain \
	# --binprefix=i686-linux
	#

	PROGNAME=$(basename $0)
	PROGDIR=$(dirname $0)
	PROGDIR=$(cd $PROGDIR && pwd)

	HELP=
	VERBOSE=1

	# This will be reset later.
	LOG_FILE=/dev/null

	panic ()
	{
	1>&2 echo "Error: $@"
	exit 1
	}

	fail_panic ()
	{
	if [ $? != 0 ]; then
	panic "$@"
	fi
	}

	var_value ()
	{
	eval echo \"$1\"
	}

	var_append ()
	{
	local _varname=$1
	local _varval=$(var_value $_varname)
	shift
	if [ -z "$_varval" ]; then
	eval $_varname=\"$*\"
	else
	eval $_varname=\$$_varname\" $*\"
	fi
	}

	run ()
	{
	if [ "$VERBOSE" -gt 0 ]; then
	echo "COMMAND: >>>> $@" >> $LOG_FILE
	fi
	if [ "$VERBOSE" -gt 1 ]; then
	echo "COMMAND: >>>> $@"
	fi
	if [ "$VERBOSE" -gt 1 ]; then
	"$@"
	else
	"$@" > /dev/null 2>&1
	fi
	}

	log ()
	{
	if [ "$LOG_FILE" ]; then
	echo "$@" >> $LOG_FILE
	fi
	if [ "$VERBOSE" -gt 0 ]; then
	echo "$@"
	fi
	}

	# For now, only tested on Linux
	OS=$(uname -s)
	EXEEXT= # executable extension
	case $OS in
	Linux) OS=linux;;
	Darwin) OS=darwin;;
	CYGWIN\|_NT-*) OS=windows;
	if [ "$OSTYPE" = cygwgin ]; then
	OS=cygwin
	fi
	EXEEXT=.exe
	;;
	esac

	ARCH=$(uname -m)
	case $ARCH in
	i?86) ARCH=i686;;
	amd64) ARCH=x86_64;;
	esac

	case $OS in
	linux)
	NUM_CORES=$(grep -c -e '^processor' /proc/cpuinfo)
	;;
	darwin\|freebsd)
	NUM_CORES=`sysctl -n hw.ncpu`
	;;
	windows\|cygwin)
	NUM_CORES=$NUMBER_OF_PROCESSORS
	;;
	*) # let's play safe here
	NUM_CORES=1
	;;
	esac

	# Warn our users, because the script probably fails on anything but Linux
	# at that point (e.g. there are strange libtool build breakages on darwin).
	if [ "$OS" != "linux" ]; then
	echo "WARNING: WARNING: WARNING: THIS SCRIPT PROBABLY ONLY WORKS ON LINUX!!"
	fi

	# GMP moving home?
	# GMP_VERSION=5.1.0
	# GMP_URL=ftp://ftp.gmplib.org/pub/gmp-$GMP_VERSION/
	# ..but the old one is still there:
	GMP_VERSION=5.0.5
	GMP_URL=http://ftp.gnu.org/gnu/gmp/

	MPFR_VERSION=3.1.1
	MPC_VERSION=1.0.1
	BINUTILS_VERSION=2.22
	GCC_VERSION=4.7.2

	# Need at least revision 5166
	# For reference, I've built a working NDK with 5445
	# (latest as of Sun Feb 3 2013 is 5578)
	MINGW_W64_VERSION=svn@5166

	JOBS=$(( $NUM_CORES * 2 ))


	HOST_BINPREFIX=
	TARGET_ARCH=x86_64
	TARGET_MULTILIBS=true # not empty to enable multilib
	PACKAGE_DIR=
	FORCE_ALL=
	FORCE_BUILD=
	CLEANUP=

	TEMP_DIR=/tmp/build-mingw64-toolchain-$USER

	for opt; do
	optarg=`expr "x$opt" : 'x[^=]=\(.\)'`
	case $opt in
	-h\|-?\|--help) HELP=true;;
	--verbose) VERBOSE=$(( $VERBOSE + 1 ));;
	--quiet) VERBOSE=$(( $VERBOSE - 1 ));;
	--binprefix=*) HOST_BINPREFIX=$optarg;;
	-j\|--jobs=) JOBS=$optarg;;
	--target-arch=*) TARGET_ARCH=$optarg;;
	--no-multilib) TARGET_MULTILIBS="";;
	--force-build) FORCE_BUILD=true;;
	--force-all) FORCE_ALL=true;;
	--work-dir=*) TEMP_DIR=$optarg;;
	--package-dir=*) PACKAGE_DIR=$optarg;;
	--cleanup) CLEANUP=true;;
	--gcc-version=*) GCC_VERSION=$optarg;;
	--binutils-version=*) BINUTILS_VERSION=$optarg;;
	--gmp-version=*) GMP_VERSION=$optarg;;
	--mpfr-version=*) MPFR_VERSION=$optarg;;
	--mpc-version=*) MPC_VERSION=$optarg;;
	--mingw-version=*) MINGW_W64_VERSION=$optarg;;
	-*) panic "Unknown option '$opt', see --help for list of valid ones.";;
	*) panic "This script doesn't take any parameter, see --help for details.";;
	esac
	done


	if [ "$HELP" ]; then
	echo "Usage: $PROGNAME [options]"
	echo ""
	echo "This program is used to rebuild a mingw64 cross-toolchain from scratch."
	echo ""
	echo "Valid options:"
	echo " -h\|-?\|--help Print this message."
	echo " --verbose Increase verbosity."
	echo " --quiet Decrease verbosity."
	echo " --gcc-version=<version> Select gcc version [$GCC_VERSION]."
	echo " --binutil-version=<version> Select binutils version [$BINUTILS_VERSION]."
	echo " --gmp-version=<version> Select libgmp version [$GMP_VERSION]."
	echo " --mpfr-version=<version> Select libmpfr version [$MPFR_VERSION]."
	echo " --mpc-version=<version> Select libmpc version [$MPC_VERSION]."
	echo " --mingw-version=<version> Select mingw-w64 version [$MINGW_W64_VERSION]."
	echo " --jobs=<num> Run <num> build tasks in parallel [$JOBS]."
	echo " -j<num> Same as --jobs=<num>."
	echo " --binprefix=<prefix> Specify bin prefix for host toolchain."
	echo " --no-multilib Disable multilib toolchain build."
	echo " --target-arch=<arch> Select default target architecture [$TARGET_ARCH]."
	echo " --force-all Redo everything from scratch."
	echo " --force-build Force a rebuild (keep sources)."
	echo " --cleanup Remove all temp files after build."
	echo " --work-dir=<path> Specify work/build directory [$TEMP_DIR]."
	echo " --package-dir=<path> Package toolchain to directory."
	echo ""
	exit 0
	fi

	if [ "$CLEANUP" ]; then
	if [ -z "$PACKAGE_DIR" ]; then
	panic "You should only use --cleanup with --package-dir=<path> !".
	fi
	fi

	BUILD_TAG64=x86_64-linux-gnu
	BUILD_TAG32=i686-linux-gnu

	# We don't want debug executables
	BUILD_CFLAGS="-O2 -fomit-frame-pointer -s"
	BUILD_LDFLAGS=""

	# On Darwin, we want to use the 10.4 / 10.5 / 10.6 SDKs to generate binaries
	# that work on "old" platform releases.
	if [ "$OS" = darwin ]; then
	# Use the check for the availability of a compatibility SDK in Darwin
	# this can be used to generate binaries compatible with either Tiger or
	# Leopard.
	#
	# $1: SDK root path
	# $2: MacOS X minimum version (e.g. 10.4)
	check_darwin_sdk ()
	{
	if [ -d "$1" ] ; then
	var_append BUILD_CFLAGS "-isysroot $1 -mmacosx-version-min=$2 -DMAXOSX_DEPLOYEMENT_TARGET=$2"
	var_append BUILD_LDFLAGS "-Wl,-syslibroot,$sdk -mmacosx-version-min=$2"
	return 0 # success
	fi
	return 1
	}

	if check_darwin_sdk /Developer/SDKs/MacOSX10.4.sdku 10.4; then
	log "Generating Tiger-compatible binaries!"
	elif check_darwin_sdk /Developer/SDKs/MacOSX10.5.sdk 10.5; then
	log "Generating Leopard-compatible binaries!"
	elif check_darwin_sdk /Developer/SDKs/MacOSX10.6.sdk 10.6; then
	log "Generating Snow Leopard-compatible binaries!"
	else
	osx_version=`sw_vers -productVersion`
	log "Generating $osx_version-compatible binaries!"
	fi
	fi

	mkdir -p $TEMP_DIR
	if [ "$FORCE_ALL" ]; then
	log "Cleaning up work directory..."
	rm -rf $TEMP_DIR/*
	fi

	LOG_FILE=$TEMP_DIR/build.log
	rm -f $LOG_FILE && touch $LOG_FILE
	if [ "$VERBOSE" -eq 1 ]; then
	echo "To follow build, use in another terminal: tail -F $LOG_FILE"
	fi

	case $TARGET_ARCH in
	x86_64) TARGET_BITS=64;;
	i686) TARGET_BITS=32;;
	*) panic "Invalid --target parameter. Valid values are: x86_64 i686";;
	esac
	TARGET_TAG=$TARGET_ARCH-w64-mingw32
	log "Target arch: $TARGET_TAG"
	log "Target bits: $TARGET_BITS"

	# Determine bitness of host architecture
	PROBE_CC=${CC:-gcc}
	if [ -n "$HOST_BINPREFIX" ]; then
	# If $HOST_BINPREFIX is a directory but not ends with '/', append '/'.
	# Otherwise, append '-'.
	if [ -d "$HOST_BINPREFIX" ] ; then
	if [ -n "${HOST_BINPREFIX##*/}" ] ; then
	HOST_BINPREFIX="${HOST_BINPREFIX}/"
	fi
	else
	HOST_BINPREFIX="${HOST_BINPREFIX}-"
	fi
	PROBE_CC=${HOST_BINPREFIX}gcc
	fi
	echo "Using GCC: $PROBE_CC"
	echo "int main() { return 0; }" > $TEMP_DIR/test-host-cc.c
	$PROBE_CC -c $TEMP_DIR/test-host-cc.c -o $TEMP_DIR/test-host-cc.o > /dev/null
	fail_panic "Host compiler doesn't work: $PROBE_CC"

	file $TEMP_DIR/test-host-cc.o \| grep -q -e "x86[_-]64"
	if [ $? != 0 ]; then
	log "Host compiler generates 32-bit code: $PROBE_CC"
	HOST_ARCH=i686
	HOST_BITS=32
	else
	log "Host compiler generates 64-bit code: $PROBE_CC"
	HOST_ARCH=x86_64
	HOST_BITS=64
	fi

	case $OS in
	linux) HOST_TAG=$HOST_ARCH-linux-gnu;;
	darwin) HOST_TAG=$HOST_ARCH-apple-darwinx11;;
	cygwin) HOST_TAG=$HOST_ARCH-pc-cygwin;;
	*) panic "Unsupported host operating system!"
	esac
	log "Host arch: $HOST_TAG"

	download_package ()
	{
	# Assume the packages are already downloaded under $ARCHIVE_DIR
	local PKG_URL=$1
	local PKG_NAME=$(basename $PKG_URL)

	case $PKG_NAME in
	*.tar.bz2)
	PKG_BASENAME=${PKG_NAME%%.tar.bz2}
	;;
	*.tar.gz)
	PKG_BASENAME=${PKG_NAME%%.tar.gz}
	;;
	*)
	panic "Unknown archive type: $PKG_NAME"
	esac

	if [ ! -f "$ARCHIVE_DIR/$PKG_NAME" ]; then
	log "Downloading $PKG_URL..."
	(cd $ARCHIVE_DIR && run curl -L -o "$PKG_NAME" "$PKG_URL")
	fail_panic "Can't download '$PKG_URL'"
	fi

	MD5SUM=$(md5sum $ARCHIVE_DIR/$PKG_NAME \| cut -d" " -f1)
	echo "$MD5SUM $PKG_URL" >> $INSTALL_DIR/README

	if [ ! -d "$SRC_DIR/$PKG_BASENAME" ]; then
	log "Uncompressing $PKG_URL into $SRC_DIR"
	case $PKG_NAME in
	*.tar.bz2)
	run tar xjf $ARCHIVE_DIR/$PKG_NAME -C $SRC_DIR
	;;
	*.tar.gz)
	run tar xzf $ARCHIVE_DIR/$PKG_NAME -C $SRC_DIR
	;;
	*)
	panic "Unknown archive type: $PKG_NAME"
	;;
	esac
	fail_panic "Can't uncompress $ARCHIVE_DIR/$PKG_NAME"
	fi
	}

	# Download and unpack source packages from official sites
	ARCHIVE_DIR=$TEMP_DIR/archive
	SRC_DIR=$TEMP_DIR/src
	STAMP_DIR=$TEMP_DIR/timestamps

	mkdir -p $ARCHIVE_DIR
	mkdir -p $SRC_DIR
	mkdir -p $STAMP_DIR

	INSTALL_DIR=$TEMP_DIR/install-$HOST_TAG/$TARGET_TAG
	BUILD_DIR=$TEMP_DIR/build-$HOST_TAG

	if [ "$FORCE_BUILD" ]; then
	rm -f $STAMP_DIR/*
	rm -rf $INSTALL_DIR
	rm -rf $BUILD_DIR
	fi

	# Make temp install directory
	mkdir -p $INSTALL_DIR
	mkdir -p $BUILD_DIR

	# Copy this script
	cp $0 $INSTALL_DIR/ &&
	echo "This file has been automatically generated on $(date) with the following command:" > $INSTALL_DIR/README &&
	echo "$PROGNAME $@" >> $INSTALL_DIR/README &&
	echo "" >> $INSTALL_DIR/README &&
	echo "The MD5 hashes for the original sources packages are:" >> $INSTALL_DIR/README
	fail_panic "Could not copy script to installation directory."

	download_package ${GMP_URL}gmp-${GMP_VERSION}.tar.bz2
	download_package http://ftp.gnu.org/gnu/mpfr/mpfr-$MPFR_VERSION.tar.bz2
	download_package http://www.multiprecision.org/mpc/download/mpc-$MPC_VERSION.tar.gz
	download_package http://ftp.gnu.org/gnu/binutils/binutils-$BINUTILS_VERSION.tar.bz2
	download_package http://ftp.gnu.org/gnu/gcc/gcc-$GCC_VERSION/gcc-$GCC_VERSION.tar.bz2

	PREFIX_FOR_TARGET=$INSTALL_DIR/$TARGET_TAG
	WITH_WIDL=$INSTALL_DIR/bin
	MINGW_W64_REVISION=
	MINGW_W64_VERSION_NO_REV=$(echo $MINGW_W64_VERSION \| awk 'BEGIN { FS="@" }; { print $1 }')
	if [ "$MINGW_W64_VERSION_NO_REV" = "svn" ]; then
	MINGW_W64_REVISION=$(echo $MINGW_W64_VERSION \| awk 'BEGIN { FS="@" }; { print $2 }')
	if [ ! -z "$MINGW_W64_REVISION" ] ; then
	if [ $MINGW_W64_REVISION -lt 5186 ] ; then
	PREFIX_FOR_TARGET=$INSTALL_DIR
	fi
	if [ $MINGW_W64_REVISION -lt 5252 ] ; then
	WITH_WIDL=mingw-w64-widl
	elif [ $MINGW_W64_REVISION -lt 5258 ] ; then
	WITH_WIDL=$TARGET_TAG-widl
	fi
	MINGW_W64_REVISION2=-r$MINGW_W64_REVISION
	MINGW_W64_REVISION=@${MINGW_W64_REVISION}
	fi
	MINGW_W64_SRC=$SRC_DIR/mingw-w64-svn$MINGW_W64_REVISION2
	MINGW_W64_VERSION=svn
	fi

	if [ -z "$MINGW_W64_REVISION" ] ; then
	# Released versions of MinGW-w64 don't provide easily accessible information
	# about the svn revision which this script needs to know.
	fail_panic "Building MinGW-w64 toolchain requires specifying an svn version"
	fi

	if [ ! -d $MINGW_W64_SRC ]; then
	echo "Checking out https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk$MINGW_W64_REVISION $MINGW_W64_SRC"
	run svn co https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64/trunk$MINGW_W64_REVISION $MINGW_W64_SRC
	fi

	PATCHES_DIR="$PROGDIR/toolchain-patches-host/mingw-w64"
	if [ -d "$PATCHES_DIR" ] ; then
	PATCHES=$(find "$PATCHES_DIR" -name "*.patch" \| sort)
	for PATCH in $PATCHES; do
	echo "Patching mingw-w64-$MINGW_W64_REVISION with $PATCH"
	(cd $MINGW_W64_SRC && run patch -p0 < $PATCH)
	done
	fi

	# Let's generate the licenses/ directory
	LICENSES_DIR=$INSTALL_DIR/licenses/
	mkdir -p $LICENSES_DIR
	if [ ! -f $STAMP_DIR/licenses ]; then
	LICENSE_FILES=$(cd $SRC_DIR && find . -name "COPYING*")
	# Copy all license files to $LICENSES_DIR
	(tar cf - -C $SRC_DIR $LICENSE_FILES) \| (tar xf - -C $LICENSES_DIR)
	touch $STAMP_DIR/licenses
	fi

	setup_build_env ()
	{
	local BINPREFIX=$1

	if [ "$BINPREFIX" ]; then
	CC=${BINPREFIX}gcc
	CXX=${BINPREFIX}g++
	LD=${BINPREFIX}ld
	AS=${BINPREFIX}as
	AR=${BINPREFIX}ar
	RANLIB=${BINPREFIX}ranlib
	STRIP=${BINPREFIX}strip
	export CC CXX LD AS AR RANLIB STRIP
	elif [ "$OS" = darwin ]; then
	# Needed on OS X otherwise libtool will try to use gcc and $BUILD_CFLAGS
	LD=ld
	fi

	export CFLAGS="$BUILD_CFLAGS"
	export CXXFLAGS="$BUILD_CFLAGS"
	export LDFLAGS="$BUILD_LDFLAGS"
	}

	setup_install_env ()
	{
	export PATH=$INSTALL_DIR/bin:$PATH
	}

	build_host_package ()
	{
	local PKGNAME=$1
	shift

	if [ ! -f $STAMP_DIR/$PKGNAME ]; then
	(
	mkdir -p $BUILD_DIR/$PKGNAME &&
	cd $BUILD_DIR/$PKGNAME &&
	setup_build_env $HOST_BINPREFIX &&
	log "$PKGNAME: Configuring" &&
	run $SRC_DIR/$PKGNAME/configure "$@"
	fail_panic "Can't configure $PKGNAME !!"

	log "$PKGNAME: Building" &&
	run make -j$JOBS
	fail_panic "Can't build $PKGNAME !!"

	log "$PKGNAME: Installing" &&
	run make install
	fail_panic "Can't install $PKGNAME"
	) \|\| exit 1
	touch $STAMP_DIR/$PKGNAME
	fi
	}

	export ABI=$HOST_BITS
	BASE_HOST_OPTIONS="--prefix=$INSTALL_DIR --disable-shared"
	build_host_package gmp-$GMP_VERSION $BASE_HOST_OPTIONS
	var_append BASE_HOST_OPTIONS "--with-gmp=$INSTALL_DIR"

	build_host_package mpfr-$MPFR_VERSION $BASE_HOST_OPTIONS
	var_append BASE_HOST_OPTIONS "--with-mpfr=$INSTALL_DIR"

	build_host_package mpc-$MPC_VERSION $BASE_HOST_OPTIONS
	var_append BASE_HOST_OPTIONS "--with-mpc=$INSTALL_DIR"

	BINUTILS_CONFIGURE_OPTIONS=$BASE_HOST_OPTIONS
	var_append BINUTILS_CONFIGURE_OPTIONS "--target=$TARGET_TAG --disable-nls"
	if [ "$TARGET_MULTILIBS" ]; then
	var_append BINUTILS_CONFIGURE_OPTIONS "--enable-targets=x86_64-w64-mingw32,i686-w64-mingw32"
	fi

	var_append BINUTILS_CONFIGURE_OPTIONS "--with-sysroot=$INSTALL_DIR"

	build_host_package binutils-$BINUTILS_VERSION $BINUTILS_CONFIGURE_OPTIONS

	build_mingw_tools ()
	{
	local PKGNAME=$1
	echo "$STAMP_DIR/$PKGNAME"
	if [ ! -f "$STAMP_DIR/$PKGNAME" ]; then
	(
	mkdir -p $BUILD_DIR/$PKGNAME &&
	cd $BUILD_DIR/$PKGNAME &&
	log "$PKGNAME: Configuring" &&
	run $MINGW_W64_SRC/mingw-w64-tools/widl/configure --prefix=$INSTALL_DIR --target=$TARGET_TAG
	fail_panic "Can't configure mingw-64-tools"
	log "$PKGNAME: Installing" &&
	run make install -j$JOBS
	) \|\| exit 1
	touch $STAMP_DIR/$PKGNAME
	fi
	}

	# Install the right mingw64 headers into the sysroot
	build_mingw_headers ()
	{
	local PKGNAME=$1
	if [ ! -f "$STAMP_DIR/$PKGNAME" ]; then
	(
	# If --with-widl only identifies the program name (svn version dependent)...
	if [ $(basename "$WITH_WIDL") = "$WITH_WIDL" ] ; then
	# ...then need to add the right path too.
	export PATH=$PATH:$INSTALL_DIR/bin
	fi
	fail_panic "Can't find widl"
	mkdir -p $BUILD_DIR/$PKGNAME &&
	cd $BUILD_DIR/$PKGNAME &&
	log "$PKGNAME: Configuring" &&
	run $MINGW_W64_SRC/mingw-w64-headers/configure --prefix=$PREFIX_FOR_TARGET --host=$TARGET_TAG \
	--build=$HOST_TAG --with-widl=$WITH_WIDL --enable-sdk=all
	fail_panic "Can't configure mingw-64-headers"

	run make
	log "$PKGNAME: Installing" &&
	run make install -j$JOBS &&
	run cd $INSTALL_DIR &&
	run ln -s $TARGET_TAG mingw &&
	run cd $INSTALL_DIR/mingw &&
	run ln -s lib lib$TARGET_BITS
	fail_panic "Can't configure mingw-64-headers"
	) \|\| exit 1
	touch $STAMP_DIR/$PKGNAME
	fi
	}

	# Slightly different from build_host_package because we need to call
	# 'make all-gcc' and 'make install-gcc' as a special case.
	#
	build_core_gcc ()
	{
	local PKGNAME=$1
	shift

	if [ ! -f "$STAMP_DIR/core-$PKGNAME" ]; then
	(
	mkdir -p $BUILD_DIR/$PKGNAME &&
	cd $BUILD_DIR/$PKGNAME &&
	setup_build_env $HOST_BINPREFIX &&
	log "core-$PKGNAME: Configuring" &&
	run $SRC_DIR/$PKGNAME/configure "$@"
	fail_panic "Can't configure $PKGNAME !!"

	log "core-$PKGNAME: Building" &&
	run make -j$JOBS all-gcc
	fail_panic "Can't build $PKGNAME !!"

	log "core-$PKGNAME: Installing" &&
	run make -j$JOBS install-gcc
	fail_panic "Can't install $PKGNAME"
	) \|\| exit 1
	touch $STAMP_DIR/core-$PKGNAME
	fi
	}


	# Build and install the C runtime files needed by the toolchain
	build_mingw_crt ()
	{
	local PKGNAME=$1
	shift

	if [ ! -f $STAMP_DIR/$PKGNAME ]; then
	(
	mkdir -p $BUILD_DIR/$PKGNAME &&
	cd $BUILD_DIR/$PKGNAME &&
	export PATH=$INSTALL_DIR/bin:$PATH
	log "$PKGNAME: Configuring" &&
	run $MINGW_W64_SRC/mingw-w64-crt/configure "$@"
	fail_panic "Can't configure $PKGNAME !!"

	log "$PKGNAME: Building" &&
	run make -j$JOBS
	fail_panic "Can't build $PKGNAME !!"

	log "$PKGNAME: Installing" &&
	run make -j$JOBS install
	fail_panic "Can't install $PKGNAME"
	) \|\| exit 1
	touch $STAMP_DIR/$PKGNAME
	fi
	}


	build_libgcc ()
	{
	local PKGNAME=$1
	shift

	if [ ! -f "$STAMP_DIR/libgcc-$PKGNAME" ]; then
	(
	# No configure step here! We're resuming work that was started
	# in build_core_gcc.
	cd $BUILD_DIR/$PKGNAME &&
	setup_build_env $HOST_BINPREFIX &&
	log "libgcc-$PKGNAME: Building" &&
	run make -j$JOBS
	fail_panic "Can't build libgcc-$PKGNAME !!"

	log "libgcc-$PKGNAME: Installing" &&
	run make -j$JOBS install
	fail_panic "Can't install libgcc-$PKGNAME"
	) \|\| exit 1

	touch "$STAMP_DIR/libgcc-$PKGNAME"
	fi
	}

	GCC_CONFIGURE_OPTIONS=$BASE_HOST_OPTIONS
	var_append GCC_CONFIGURE_OPTIONS "--target=$TARGET_TAG"
	if [ "$TARGET_MULTILIBS" ]; then
	var_append GCC_CONFIGURE_OPTIONS "--enable-targets=all"
	fi
	var_append GCC_CONFIGURE_OPTIONS "--enable-languages=c,c++"
	var_append GCC_CONFIGURE_OPTIONS "--with-sysroot=$INSTALL_DIR"

	# A bug in MinGW-w64 forces us to build and use widl.
	build_mingw_tools mingw-w64-tools
	build_mingw_headers mingw-w64-headers

	build_core_gcc gcc-$GCC_VERSION $GCC_CONFIGURE_OPTIONS

	CRT_CONFIGURE_OPTIONS="--host=$TARGET_TAG --with-sysroot=$INSTALL_DIR --prefix=$PREFIX_FOR_TARGET"
	if [ "$TARGET_MULTILIBS" ]; then
	var_append CRT_CONFIGURE_OPTIONS "--enable-lib32"
	fi

	build_mingw_crt mingw-w64-crt $CRT_CONFIGURE_OPTIONS

	build_libgcc gcc-$GCC_VERSION

	if [ "$PACKAGE_DIR" ]; then
	mkdir -p $PACKAGE_DIR
	fail_panic "Could not create packaging directory: $PACKAGE_DIR"
	PACKAGE_NAME=$PACKAGE_DIR/$TARGET_TAG-$OS-$HOST_ARCH.tar.bz2
	log "Packaging $TARGET_TAG toolchain to $PACKAGE_NAME"
	run tar cjf $PACKAGE_NAME -C $(dirname $INSTALL_DIR) $TARGET_TAG/
	fail_panic "Could not package $TARGET_TAG toolchain!"
	log "Done. See $PACKAGE_DIR:"
	ls -l $PACKAGE_NAME
	else
	log "Done. See: $INSTALL_DIR"
	fi

	if [ "$CLEANUP" ]; then
	log "Cleaning up..."
	rm -rf $TEMP_DIR/*
	fi

	exit 0