This is a script for building gcc cross compilers.

Build Script for Cross Compilers (xgcc)

# Building xgcc for C:

# On a mac install the latest gcc binaries via macports.org:

sudo port install gcc48
port select --list gcc
sudo port select --set gcc mp-gcc48
hash -r

# Building xgcc:

# Download and extract binutils, gcc, newlib, and gdb sources:

cd $HOME/Downloads

wget ftp://ftp.gnu.org/pub/gnu/binutils/binutils-2.23.2.tar.bz2
wget ftp://ftp.gnu.org/pub/gnu/gcc/gcc-4.8.1/gcc-4.8.1.tar.bz2
wget ftp://sources.redhat.com/pub/newlib/newlib-1.20.0.tar.gz
wget ftp://ftp.gnu.org/pub/gnu/gdb/gdb-7.6.tar.bz2

tar zxvf binutils-2.23.2.tar.bz2
tar zxvf gcc-4.8.1.tar.bz2
tar zxvf newlib-1.20.0.tar.gz
tar zxvf gdb-7.6.tar.bz2

# Download gcc dependencies:

cd gcc-4.8.1
./contrib/download_prerequisites
cd ..

# Select target

export TARGET=mips-elf

# For i386-elf:
# export TARGET=i386-elf

export PREFIX=$HOME/Dropbox/Tools/$TARGET
export PATH=$PATH:$PREFIX/bin

# Configure and build binutils:

mkdir binutils-build
cd binutils-build

../binutils-2.23.2/configure --target=$TARGET --prefix=$PREFIX

make
make install
cd ..

# Configure and build bootstrap xgcc:

mkdir gcc-build
cd gcc-build

../gcc-4.8.1/configure --target=$TARGET --prefix=$PREFIX --enable-languages=c --without-headers --with-newlib --with-gnu-as --with-gnu-ld

make all-gcc
make install-gcc
cd ..

# Configure and build newlib:

mkdir newlib-build
cd newlib-build

../newlib-1.20.0/configure --target=$TARGET --prefix=$PREFIX

make
make install

# Configure and build xgcc:

cd gcc-build

../gcc-4.8.1/configure --target=$TARGET --prefix=$PREFIX --enable-languages=c --with-newlib --with-gnu-as --with-gnu-ld --disable-shared --disable-libssp

make
make install
cd ..

# Configure and build gdb:

mkdir gdb-build
cd gdb-build

../gdb-7.6/configure --target=$TARGET --prefix=$PREFIX --disable-tui

make
make install
cd ..