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#! /bin/bash
# This shell script can be used to install the GNU gcc compiler on an
# OS X computer. The GNU gcc compiler is usually better at compiling
# C code produced by the Gambit Scheme compiler than the clang (LLVM)
# compiler which is provided with Apple's Xcode.
# After executing:
#
# ./install-gnu-gcc-osx
#
# you should add this line to your ~/.profile and ~/.bashrc files:
#
# export PATH=/usr/gcc-4.7.1/bin:$PATH
# The shell script assumes that the homebrew system (see
# http://http://mxcl.github.com/homebrew) and Xcode have been
# installed.
VERSION=4.7.1
PREFIX=/usr/gcc-$VERSION
LANGUAGES=c,c++
MAKE="make -j 4"
brew_path() { brew info $1 | head -n3 | tail -n1 | cut -d' ' -f1; }
# Prerequisites
brew install gmp
brew install mpfr
brew install libmpc
# Download & install the latest GCC
mkdir -p $PREFIX
mkdir temp-gcc
cd temp-gcc
wget ftp://ftp.gnu.org/gnu/gcc/gcc-$VERSION/gcc-$VERSION.tar.gz
tar xfz gcc-$VERSION.tar.gz
rm gcc-$VERSION.tar.gz
cd gcc-$VERSION
mkdir build
cd build
../configure \
--prefix=$PREFIX \
--with-gmp=$(brew_path gmp) \
--with-mpfr=$(brew_path mpfr) \
--with-mpc=$(brew_path libmpc) \
--enable-languages=$LANGUAGES \
--with-system-zlib \
--enable-stage1-checking \
--enable-plugin \
--enable-lto \
--disable-multilib
$MAKE bootstrap
sudo make install
cd ../../..
rm -r temp-gcc
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