How I installed arm-elf-gcc on Mac OS X

arm-elf-gcc_on_osx.sh

#!/bin/bash


mkdir toolchain
cd toolchain

wget ftp://sources.redhat.com/pub/newlib/newlib-1.19.0.tar.gz
wget http://ftp.gnu.org/gnu/gdb/gdb-7.2.tar.gz
wget http://ftp.gnu.org/gnu/binutils/binutils-2.21.tar.bz2
wget http://ftp.gnu.org/gnu/gcc/gcc-4.6.0/gcc-core-4.6.0.tar.bz2
wget http://ftp.gnu.org/gnu/gcc/gcc-4.6.0/gcc-g++-4.6.0.tar.bz2

extract binutils-2.21.tar.bz2
extract gcc-core-4.6.0.tar.bz2
extract newlib-1.19.0.tar.gz
extract gdb-7.2.tar.gz
extract gcc-g++-4.6.0.tar.bz2


export target=arm-elf
export prefix=/usr/local/$target
export PATH=$prefix/bin:$PATH


mkdir -p $prefix/bin


cd binutils-2.21
mkdir build-$target
cd build-$target
../configure --target=$target --prefix=$prefix --enable-interwork --enable-multilib \
    --disable-nls --disable-shared --disable-threads --with-gcc --with-gnu-as --with-gnu-ld
make
make install


cd ../../gcc-4.6.0
mkdir build-$target
cd build-$target
../configure --target=$target --prefix=$prefix \
    --disable-nls --disable-shared --disable-threads \
    --with-gcc --with-gnu-ld --with-gnu-as --with-dwarf2 \
    --enable-languages=c,c++ --enable-interwork \
    --enable-multilib --with-newlib \
    --with-headers=../../newlib-1.19.0/newlib/libc/include \
    --disable-libssp --disable-libstdcxx-pch \
    --disable-libmudflap --disable-libgomp -v
mkdir -p libiberty libcpp fixincludes 
make all-gcc
make install-gcc

cd ../../newlib-1.19.0
mkdir build-$target
cd build-$target
../configure --target=$target --prefix=$prefix --enable-interwork --enable-multilib
make
make install


cd ../../gcc-4.6.0/build-$target
make
make install


cd ../../gdb-7.2
mkdir build-$target
cd build-$target
../configure --target=$target --prefix=$prefix --disable-nls
make
make install

same

these links are dead "
wget http://ftp.gnu.org/gnu/gdb/gdb-7.2.tar.gz
 wget http://ftp.gnu.org/gnu/binutils/binutils-2.21.tar.bz2
"

Link correct:
wget http://ftp.gnu.org/gnu/gdb/gdb-7.2a.tar.gz
and
wget http://ftp.gnu.org/gnu/binutils/binutils-2.21.1.tar.bz2 :-)