#!/bin/bash -x

BINUTILS_VERSION=${BINUTILS_VERSION:-"2.20"}
GCC_VERSION=${GCC_VERSION:-"4.4.2"}
TARGET=${TARGET:-"i586-elf"}
PREFIX=${PREFIX:-"$HOME/local/$TARGET"}
GNUFTP=ftp://ftp.gnu.org/gnu
export PATH=$PREFIX/bin:$PATH

mkdir -p build-binutils build-gcc

if [ ! -f "binutils-$BINUTILS_VERSION.tar.bz2" ]; then
    wget "$GNUFTP/binutils/binutils-$BINUTILS_VERSION.tar.bz2"
    if [ $? != 0 ]; then
        echo "Error downloading binutils"
        exit 1
    fi
fi

if [ ! -f "gcc-$GCC_VERSION.tar.bz2" ]; then
    wget "$GNUFTP/gcc/gcc-$GCC_VERSION/gcc-$GCC_VERSION.tar.bz2"
    if [ $? != 0 ]; then
        echo "Error downloading gcc"
        exit 1
    fi
fi

if [ ! -d "binutils-$BINUTILS_VERSION" ]; then
    tar xvjf "binutils-$BINUTILS_VERSION.tar.bz2"
    if [ $? != 0 ]; then
        echo "Error extracting binutils"
        exit 1
    fi
fi

if [ ! -d "gcc-$GCC_VERSION" ]; then
    tar xvjf "gcc-$GCC_VERSION.tar.bz2"
    if [ $? != 0 ]; then
        echo "Error extracting gcc"
        exit 1
    fi
fi


# build binutils
dum=`which $TARGET-ar`
if [ $? != 0 ]; then
    pushd build-binutils
    ../binutils-$BINUTILS_VERSION/configure --target=$TARGET --prefix=$PREFIX --disable-nls
    if [ $? != 0 ]; then
        echo "Error configuring binutils"
        exit 1
    fi
    make all
    if [ $? != 0 ]; then
        echo "Error building binutils"
        exit 1
    fi
    make install
    if [ $? != 0 ]; then
        echo "Error installing binutils"
        exit 1
    fi
    popd
fi


# build gcc
dum=`which $TARGET-gcc`
if [ $? != 0 ]; then
    pushd build-gcc
    ../gcc-$GCC_VERSION/configure --target=$TARGET --prefix=$PREFIX --disable-nls --enable-languages=c,c++ --without-headers
    if [ $? != 0 ]; then
        echo "Error configuring gcc"
        exit 1
    fi
    make all-gcc
    if [ $? != 0 ]; then
        echo "Error building gcc"
        exit 1
    fi
    make install-gcc
    if [ $? != 0 ]; then
        echo "Error installing gcc"
        exit 1
    fi
    make all-target-libgcc
    if [ $? != 0 ]; then
        echo "Error building libgcc"
        exit 1
    fi
    make install-target-libgcc
    if [ $? != 0 ]; then
        echo "Error installing libgcc"
        exit 1
    fi
    popd
fi

exit 0