version="4.2.4"
prepare_settings() {
    if [ "$GCCARCHTUPLE" = "" ]; then
	echo "At least GCCARCHTUPLE must be set prior to compilation."
	exit 1
    fi
    if [ "$GCCARCH" = "" ]; then
	GCCARCH="$(echo "$GCCARCHTUPLE" | sed -e 's/\([^-]*\).*/\1/')"
    fi
    if [ "$GCCARCHFAMILY" = "" ]; then
	case "$GCCARCH" in
	    i*86)
		GCCARCHFAMILY="i386"
		;;
	    arm*)
		GCCARCHFAMILY="arm"
		;;
	    powerpc*)
		GCCARCHFAMILY="powerpc"
		;;
	    mips*)
		GCCARCHFAMILY="mips"
		;;
	    sparc*)
		GCCARCHFAMILY="sparc"
		;;
	    *)
		GCCARCHFAMILY="$GCCARCH"
		;;
	esac
    fi
    ### is this an uclibc build?
    if echo "$GCCARCHTUPLE" | grep -i uclibc >& /dev/null
    then
	GCCLIBC="uclibc"
    else
	GCCLIBC="glibc"
    fi
    ### INITIALIZE
    TARGETDIR="$MLS_STAGING/usr/gcc4-$GCCARCHTUPLE"
    SYSROOT="$TARGETDIR/sysroot-$GCCARCHTUPLE"
    mkdir -p "$SYSROOT"
    PATH="$TARGETDIR/bin:$TARGETDIR/gcc-core/bin:$PATH"
    LOCAL="$(gcc -dumpmachine)"
    if [ "$GCCARCHFAMILY" != "powerpc" ]; then
	WITHARCH="--with-arch=$GCCARCH"
    else
	WITHARCH=""
    fi
    if [ "$MLS_SOURCES" = "" ]; then
	MLS_SOURCES="."
    fi
}
showconfig() {
    prepare_settings
    echo "To be compiled as follows:"
    echo
    echo "GCCARCHTUPLE:  $GCCARCHTUPLE"
    echo "GCCARCH:       $GCCARCH"
    echo "GCCARCHFAMILY: $GCCARCHFAMILY"
    echo "GCCLIBC:       $GCCLIBC"
    echo
    echo "TARGETDIR:     $TARGETDIR"
    echo "SYSROOT:       $SYSROOT"
    echo "LOCAL:         $LOCAL"
    echo
}
prepare() {
    prepare_settings
    init_prepare
    mkdir -p "$MLS_WORKDIR"
    cd "$MLS_WORKDIR"
    mls-extract "http://ftp.gnu.org/gnu/binutils/binutils-2.18.tar.bz2"
    mls-extract "http://cross-lfs.org/files/packages/embedded-0.0.1/linux-headers-2.6.20.1-02252007.tar.bz2"
    mls-extract "http://ftp.gnu.org/gnu/gcc/gcc-4.2.4/gcc-core-4.2.4.tar.bz2"
    mls-extract "http://ftp.gnu.org/gnu/gcc/gcc-4.2.4/gcc-g++-4.2.4.tar.bz2"
    if [ "$GCCLIBC" = "glibc" ]; then
	mls-extract "http://ftp.gnu.org/gnu/glibc/glibc-2.7.tar.bz2"
	mls-extract "http://ftp.gnu.org/gnu/glibc/glibc-ports-2.7.tar.bz2"
	mv -v glibc-ports-2.7 glibc-2.7/
	mls-patch -p0 "$MLS_SPECSRC"/glibc_2.7.all.libgcc_eh.p0.patch
    fi
    if [ "$GCCLIBC" = "uclibc" ]; then
	mls-extract "http://www.uclibc.org/downloads/uClibc-0.9.29.tar.bz2"
    fi
    mls-extract "http://www.kegel.com/crosstool/crosstool-0.43/fix-embedded-paths.c"
    gcc -o fix-embedded-paths "$MLS_SOURCES/fix-embedded-paths.c"
}
configure() {
    prepare_settings
    init_configure
}
build_linux_headers() {
    prepare_settings
    init_build
    mkdir -p "$SYSROOT/usr/include"
    cp -Rva "$MLS_WORKDIR"/linux-headers-2.6.20.1/include/* "$SYSROOT/usr/include"
    rm -f "$SYSROOT/usr/include/asm"
    ln -s asm-$GCCARCHFAMILY "$SYSROOT/usr/include/asm"
    ls "$SYSROOT/usr/include/asm/" > /dev/null
}
build_binutils() {
    prepare_settings
    init_build
    cd "$MLS_WORKDIR"
    rm -rf binutils-work
    mkdir -p binutils-work
    cd binutils-work
    ../binutils-2.18/configure --prefix="$TARGETDIR" --target="$GCCARCHTUPLE" --disable-nls --enable-shared \
	--disable-multilib --with-sysroot="$SYSROOT"
    make configure
    make
    make install
    cd "$MLS_WORKDIR"
    rm -rf binutils-work
}
build_glibc_headers() {
    prepare_settings
    init_build
    cd "$MLS_WORKDIR"
    rm -rf glibc-work
    mkdir -p glibc-work
    cd glibc-work
    if [ "$GCCARCHFAMILY" = "powerpc" ]; then
	echo "libc_cv_mlong_double_128ibm=yes" > config.cache
	echo "libc_cv_mlong_double_128=yes" >> config.cache
	echo "libc_cv_ppc_machine=yes" >> config.cache
    fi
    CC="gcc" ../glibc-2.7/configure --prefix="/usr" --host="$GCCARCHTUPLE" --disable-profile --with-tls \
	--enable-kernel=2.6.0 --with-__thread --cache-file=config.cache --disable-debug --disable-gd \
	--with-headers="$SYSROOT/usr/include"
    make install-headers install_root="$SYSROOT"
    mkdir -p "$SYSROOT/usr/include/bits"
    cp -v bits/stdio_lim.h "$SYSROOT/usr/include/bits/"
    mkdir -p "$SYSROOT/usr/include/gnu"
    touch "$SYSROOT/usr/include/gnu/stubs.h"
    cd "$MLS_WORKDIR"
    rm -rf glibc-work
}
configure_uclibc() {
    make defconfig ARCH="$GCCARCHFAMILY"
    if echo "$GCCARCHTUPLE" | grep -i eabi >& /dev/null
    then
	sed -i -e 's/CONFIG_ARM_OABI=.*/# CONFIG_ARM_OABI is not set/g' .config
	sed -i -e 's/# CONFIG_ARM_EABI is not set/CONFIG_ARM_EABI=y/g' .config
    fi
    sed -i \
	-e "/^KERNEL_HEADERS/s:=.*:=\"${SYSROOT}/usr/include\":" \
	-e "/^SHARED_LIB_LOADER_PREFIX/s:=.*:=\"/lib\":" \
	-e "/^DEVEL_PREFIX/s:=.*:=\"/usr\":" \
	-e "/^RUNTIME_PREFIX/s:=.*:=\"/\":" \
	.config
    make oldconfig
}
build_uclibc_headers() {
    prepare_settings
    init_build
    cd "$MLS_WORKDIR/uClibc-"*
    configure_uclibc
    make headers
    make PREFIX="$SYSROOT" install_headers
}
build_core_gcc() {
    prepare_settings
    init_build
    cd "$MLS_WORKDIR"
    rm -rf core-gcc-work
    mkdir -p core-gcc-work
    cd core-gcc-work
    ../gcc-4.2.4/configure --prefix="$TARGETDIR/gcc-core" --target="$GCCARCHTUPLE" --disable-multilib --disable-nls \
	--disable-shared --disable-threads --enable-languages=c --with-sysroot="$SYSROOT" $WITHARCH
    make all-gcc
    make install-gcc
    cd "$MLS_WORKDIR"
    rm -rf core-gcc-work
	### ENABLE THE NEWLY COMPILED BINUTILS HERE
    rm -fv "$TARGETDIR/gcc-core/$GCCARCHTUPLE/bin"
    ln -vs "$TARGETDIR/$GCCARCHTUPLE/bin" "$TARGETDIR/gcc-core/$GCCARCHTUPLE/bin"
}
build_glibc() {
    prepare_settings
    init_build
    cd "$MLS_WORKDIR"
    rm -rf glibc-work
    mkdir -p glibc-work
    cd glibc-work
    echo "libc_cv_forced_unwind=yes" > config.cache
    echo "libc_cv_c_cleanup=yes" >> config.cache
    echo "libc_cv_arm_tls=yes" >> config.cache
    BUILD_CC="gcc" CC="$GCCARCHTUPLE-gcc" AR="$GCCARCHTUPLE-ar" RANLIB="$GCCARCHTUPLE-ranlib" ../glibc-2.7/configure \
	--prefix="/usr" \
	--host="$GCCARCHTUPLE" --build="$LOCAL" --disable-profile --enable-add-ons --enable-kernel=2.6.0 --with-__thread \
	--cache-file=config.cache --disable-debug --disable-gd --with-headers="$SYSROOT/usr/include" --without-selinux
    make
    LANGUAGE=C LC_ALL=C make install_root="$SYSROOT" install
    cd "$MLS_WORKDIR"
    rm -rf glibc-work
}
build_uclibc() {
    prepare_settings
    init_build
    cd "$MLS_WORKDIR/uClibc-"*
    configure_uclibc
    make CROSS="$GCCARCHTUPLE-"
    make PREFIX="$SYSROOT" install
}
build_gcc() {
    prepare_settings
    init_build
    cd "$MLS_WORKDIR"
    rm -rf gcc-work
    mkdir -p gcc-work
    cd gcc-work
    ../gcc-4.2.4/configure --prefix="$TARGETDIR" --target="$GCCARCHTUPLE" --disable-multilib --disable-nls --enable-shared \
	--enable-threads=posix --enable-languages=c,c++ --enable-__cxa_atexit \
	--with-sysroot="$SYSROOT" --with-headers="$SYSROOT/usr/include" $WITHARCH
    make
    make install
    cd "$MLS_WORKDIR"
    rm -rf gcc-work
}
build() {
    prepare_settings
    init_build
    ### LINUX HEADERS
    if [ ! -d "$SYSROOT/usr/include/asm" ]; then
	build_linux_headers
    fi
    ### BINUTILS
    if [ ! -f "$TARGETDIR/bin/$GCCARCHTUPLE-ld" ]; then
	build_binutils
    fi
    if [ "$GCCLIBC" = "glibc" ]; then
        ### GLIBC HEADERS
	if [ ! -f "$SYSROOT/usr/include/bits/stdio_lim.h" ]; then
	    build_glibc_headers
	fi
    fi
    if [ "$GCCLIBC" = "uclibc" ]; then
	### UCLIBC HEADERS
	build_uclibc_headers
    fi
    ### CORE GCC
    if [ ! -d "$TARGETDIR/gcc-core" ]; then
	build_core_gcc
    fi
    if [ "$GCCLIBC" = "glibc" ]; then
        ### GLIBC
	if [ ! -d "$SYSROOT/lib" ]; then
	    build_glibc
	fi
    fi
    if [ "$GCCLIBC" = "uclibc" ]; then
	### UCLIBC
	if [ ! -d "$SYSROOT/lib" ]; then
	    build_uclibc
	fi
    fi
    ### FINAL GCC
    if [ ! -f "$TARGETDIR/bin/$GCCARCHTUPLE-g++" ]; then
	build_gcc
    fi
}
install() {
    prepare_settings
    init_install
    if [ -d "$TARGETDIR/gcc-core" ]; then
	rm -rfv "$TARGETDIR/gcc-core"
    fi
    rm -rfv "$TARGETDIR"/lib/libiberty.a "$TARGETDIR"/man/man7/* "$TARGETDIR"/info
    rmdir "$TARGETDIR/include" || true
    echo '*** Fixing embedded paths in GCC files.. '
    ./fix-embedded-paths "$TARGETDIR" "/usr/gcc4-$GCCARCHTUPLE" "$TARGETDIR"
    mkdir -p "$MLS_STAGING/usr/bin"
    (cd "$MLS_STAGING/usr/gcc4-$GCCARCHTUPLE/bin"
    for i in *
    do
	ln -s "../gcc4-$GCCARCHTUPLE/bin/$i" "$MLS_STAGING/usr/bin/"
    done)
}
installer() {
    prepare_settings
    init_installer
    mls-make-deb --mls --package="gcc4-$GCCARCHTUPLE"
}
deploy_files() {
    prepare_settings
    ls "gcc4-$GCCARCHTUPLE"_* 2>/dev/null || true
}