OpenCM3 is a firmware library for embedded ARM CPUs.

The firmware library was built with this compiler.

mkdir /embedded/arm-cortex/src
cd /embedded/arm-cortex/src
git clone http://github.com/libopencm3/libopencm3.git
cd libopencm3
make PREFIX=/embedded/arm-cortex/gcc-arm-none-eabi-5_2-2015q4/bin/arm-none-eabi

mkdir /embedded/arm-cortex/src
cd /embedded/arm-cortex/src
git clone https://github.com/libopencm3/libopencm3-examples.git
cd libopencm3-examples
git submodule init
git submodule update
make PREFIX=/embedded/arm-cortex/gcc-arm-none-eabi-5_2-2015q4/bin/arm-none-eabi

Wiki

Project page