Build GCC 4.7.1 on Mac OS X Lion with Go support

build_gcc4.7.1.sh

#!/bin/sh

# GCC
## Prerequisites for GCC
## http://gcc.gnu.org/install/prerequisites.html
## Installing GCC: Configuration
## http://gcc.gnu.org/install/configure.html

GCC_VER=4.7.1
WORK_DIR=$HOME/Builds/GCC
BUILD_DIR=$WORK_DIR/build
export PATH='/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin'

LANGUAGES=c,c++,go
PREFIX=/opt/gccgo
export CC='/usr/bin/llvm-gcc'
export CXX='/usr/bin/llvm-g++'
export CFLAGS='-Os -msse4'
## https://trac.macports.org/ticket/27237
export CXXFLAGS='-U_GLIBCXX_DEBUG -U_GLIBCXX_DEBUG_PEDANTIC -Os -msse4'

cd $WORK_DIR

if [ ! -d $WORK_DIR/src ] ; then
    mkdir src
    #curl -o src/gcc-${GCC_VER}.tar.bz2 -O ftp://gcc.gnu.org/pub/gcc/snapshots/${GCC_VER}/gcc-${GCC_VER}.tar.bz2
    curl -o src/gcc-${GCC_VER}.tar.bz2 -O ftp://gcc.gnu.org/pub/gcc/releases/gcc-${GCC_VER}/gcc-${GCC_VER}.tar.bz2
  elif [ ! -f $WORK_DIR/src/gcc-${GCC_VER}.tar.bz2 ] ; then
    #curl -o src/gcc-${GCC_VER}.tar.bz2 -O ftp://gcc.gnu.org/pub/gcc/snapshots/${GCC_VER}/gcc-${GCC_VER}.tar.bz2
    curl -o src/gcc-${GCC_VER}.tar.bz2 -O ftp://gcc.gnu.org/pub/gcc/releases/gcc-${GCC_VER}/gcc-${GCC_VER}.tar.bz2
fi

if [ ! -d $WORK_DIR/gcc-${GCC_VER} ] ; then
    tar xjf src/gcc-${GCC_VER}.tar.bz2
fi

if [ -d $BUILD_DIR ] ; then
    rm -fr $BUILD_DIR
fi
mkdir $BUILD_DIR

cd $BUILD_DIR
$WORK_DIR/gcc-${GCC_VER}/configure\
    --prefix=$PREFIX/gcc-${GCC_VER}\
    --with-local-prefix=$PREFIX/gcc-${GCC_VER}\
    --disable-debug\
    --disable-multilib\
    --enable-threads\
    --enable-languages=$LANGUAGES\
    --enable-stage1-checking\
    --enable-plugin\
    --disable-nls\
    --enable-lto\
    --enable-gold=default\
    --with-system-zlib\
    --with-gmp=/usr/local\
    --with-mpfr=/usr/local\
    --with-mpc=/usr/local
make clean && make bootstrap -j4 && make install-strip

# Clean
cd $WORK_DIR
rm -fr gcc-${GCC_VER}
rm -fr $BUILD_DIR