RaspberryPi 2 Cross Compile for Mac OS

Important: a case-sensitive file system is needed.

1. This toolchain requires GLIBCXX_3.4.20 which is only available in the jessie distribution. You can upgrade from wheezy to jessie following the instructions in this URL: http://raspberrypi.stackexchange.com/questions/27858/upgrade-to-raspbian-jessie
2. Create an image with the name RaspberryPiCrossCompiler with Disk Utility:
3. Click on New Image
4. Save As: RaspberryPiCrossCompiler
5. Set the following attributes, you should set the same name:
   • Name: RaspberryPiCrossCompiler
   • Size: 500MB
   • Format: Mac OS Extended (Canse-sensitive, Journaled)
6. Go to /Volumes/RaspberryPiCrossCompiler and run the following magic command line:

git clone https://github.com/pretyman/raspberrypi2-mac-crosscompiler tmp 
mv tmp/.git . 
rm -rf tmp 
git reset --hard

Using the cross compiler

This cross compiler is supported by the polly toolchain collection and hunter package manager. To use it, the following environment variables must be setup:

export RASPBERRYPI_CROSS_COMPILE_TOOLCHAIN_PATH=/Volumes/RaspberryPiCrossCompiler/x-tools/arm-unknown-linux-gnueabihf/bin/
export RASPBERRYPI_CROSS_COMPILE_TOOLCHAIN_PREFIX=arm-unknown-linux-gnueabihf
export RASPBERRYPI_CROSS_COMPILE_SYSROOT=/Volumes/RaspberryPiCrossCompiler/x-tools/arm-unknown-linux-gnueabihf/arm-unknown-linux-gnueabihf/sysroot

Then build.py --toolchain raspberrypi2-cxx11 of polly can be used to build your CMake based project.