Darwin

mkdir -p git
cd git
git clone https://github.com/tpoechtrager/osxcross.git
cd osxcross
tools/gen_sdk_package_p7zip.sh ~/ISO/Xcode_7.2.1.dmg
mv MacOSX10.11.sdk.tar.xz tarballs
sudo tools/get_dependencies.sh
./build.sh
sudo apt-get install gcc g++ zlib1g-dev libmpc-dev libmpfr-dev libgmp-dev
./build_gcc.sh


export PATH="$PATH:$HOME/git/osxcross/target/bin"