building-cross-compiler.txt

New Instructions
----------------

Use http://github.com/travisg/toolchains

1. % git clone https://github.com/travisg/toolchains.git
2. % cd toolchains
3. % ARCHES=arm ./doit
4. wait while it downloads and builds the toolchain
5. arrange for toolchains/arm-eabi-4.8.2-Linux-x86_64/bin to be in your
   path or use local.mk to override the TOOLCHAIN build variable



Old Instructions
----------------

This is a transcript of how I built the toolchain, not really intended 
to be run as a script.

TODO: see if it's smaller/faster/etc to build only for cortex-m3

Inspired by http://www.hermann-uwe.de/blog/building-an-arm-cross-toolchain-with-binutils-gcc-newlib-and-gdb-from-source and the gcc online manuals.


# install packages needed on ubuntu
sudo apt-get install libgmp3-dev libmpc-dev libgmp3-dev zlib1g-dev build-essential libncurses5-dev texinfo

# setup workspace
mkdir /work/tools
cd /work/tools

# grab sources
wget http://mirrors.kernel.org/gnu/binutils/binutils-2.22.tar.bz2
wget http://mirrors.kernel.org/gnu/gcc/gcc-4.6.2/gcc-4.6.2.tar.bz2
wget http://mirrors.kernel.org/gnu/gdb/gdb-7.3.1.tar.bz2
tar -xjvf binutils-2.22.tar.bz2
tar -xjvf gcc-4.6.2.tar.bz2
tar -xjvf gdb-7.3.1.tar.bz2

mkdir build 

cd build
../binutils-2.22/configure --target=arm-none-eabi --prefix=/work/tools/arm --enable-interwork --enable-multilib --with-gnu-as --with-gnu-ld --disable-nls
make
make install
cd ..
rm -rf build/*

cd build
../gcc-4.6.2/configure --target=arm-none-eabi --prefix=/work/tools/arm --enable-interwork --enable-multilib --enable-languages="c" --disable-nls --disable-shared --disable-threads --without-headers --with-gnu-as --with-gnu-ld  --with-system-zlib --disable-libssp --disable-libmudflap --disable-libgomp
make
make install
cd ..
rm -rf build/*

cd build
../gdb-7.3.1/configure --target=arm-none-eabi --prefix=/work/tools/arm --enable-interwork --enable-multilib
make
make install
cd ..
rm -rf build/*