Script for automating GCC's build.

build_gcc.sh

#!/bin/sh

set -x
set -e

PREFIX='/opt/gcc'
WGET='wget --tries=3'

GCC_URL='http://gcc.cybermirror.org/releases/gcc-4.8.1/gcc-4.8.1.tar.bz2'
GMP_URL='http://mirror.switch.ch/ftp/mirror/gnu/gmp/gmp-5.1.2.tar.bz2'
MPFR_URL='http://www.mpfr.org/mpfr-current/mpfr-3.1.2.tar.bz2'
MPC_URL='http://www.multiprecision.org/mpc/download/mpc-1.0.1.tar.gz'
ISL_URL='ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.11.1.tar.bz2'
CLOOG_URL='ftp://gcc.gnu.org/pub/gcc/infrastructure/cloog-0.18.0.tar.gz'

#
# This assumes all needed files are in the same directory
#

get_it()
{
    file_url="$1"
    file=`basename $file_url`
    dirname=`basename $file .tar.bz2`
    if [ "$file" == "$dirname" ]; then
        dirname=`basename $file .tar.gz`
    fi
    if [ ! -d "$dirname" ]; then
        if [ ! -f "$file" ]; then
            $WGET "$file_url"
        fi

        tar xf "$file"
    fi
}

build_it()
{
    file_url="$1"
    test_file="$2"
    config_flags=$3

    get_it "$file_url"

    if [ ! -f "$PREFIX/$test_file" ]; then
        pushd "$dirname"
        CFLAGS="-I$PREFIX/include" LDFLAGS="-L$PREFIX/lib" \
            ./configure --prefix="$PREFIX" $config_flags
        make -j 8
        if [ $? -eq 0 ]; then
            sudo make install
        fi
        popd
    fi
}

build_gcc()
{
    get_it "$GCC_URL"
    mkdir -p gcc-build
    pushd gcc-build

    GCC_DIR=`basename $GCC_URL .tar.bz2`
    CFLAGS="-I$PREFIX/include" LDFLAGS="-L$PREFIX/lib" \
        "../$GCC_DIR/configure" --prefix="$PREFIX" --enable-threads --with-cpu=core2 \
        --enable-languages=c,objc --disable-nls --enable-lto --with-gmp="$PREFIX" --with-mpfr="$PREFIX" \
        --with-mpc="$PREFIX" --with-isl="$PREFIX" --with-cloog="$PREFIX"

    make -j 8
    if [ $? -eq 0 ]; then
        sudo make install
    fi

    popd
}

build_it "$GMP_URL" "include/gmp.h" "--enable-cxx"
build_it "$MPFR_URL" "include/mpfr.h"
build_it "$MPC_URL" "include/mpc.h"
build_it "$ISL_URL" "include/isl/config.h" "--with-gmp=system"
build_it "$CLOOG_URL" "bin/cloog" "--with-gmp=system --with-isl=system"

build_gcc