Crosscompiling xash3d for rpi

#Obviously change this to a different folder if you want
mkdir ~/rpi && cd ~/rpi

LIBSDLVERSION=SDL2-2.0.4

#build deps
sudo apt-get install build-essential g++-arm-linux-gnueabihf cmake
curl https://www.libsdl.org/release/$LIBSDLVERSION.tar.gz | tar xvf
git clone --recursive https://github.com/SDLash3D/xash3d.git
git clone https://github.com/raspberrypi/tools.git --depth=1


mkdir -p $LIBSDLVERSION/build && cd $LIBSDLVERSION/build
cmake -DCMAKE_TOOLCHAIN_FILE=~/rpitoolchain.cmake ..
make
make install #installs to the sysroot

mkdir -p ../../xash3d/build && cd ../../xash3d/build
cmake -DHL_SDK_DIR=../hlsdk -DXASH_SDL=yes -DXASH_GLES=yes -DXASH_VGUI=no -DCMAKE_TOOLCHAIN_FILE=~/rpitoolchain.cmake ..

rpitoolchain.cmake

set(CMAKE_SYSTEM_NAME Linux)

set(CMAKE_SYSROOT /home/beau/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/arm-linux-gnueabihf/sysroot/)
set(CMAKE_STAGING_PREFIX /home/beau/tools/arm-bcm2708/arm-rpi-4.9.3-linux-gnueabihf/arm-linux-gnueabihf/sysroot/)


set(CMAKE_C_COMPILER /home/beau/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-gcc)
set(CMAKE_CXX_COMPILER /home/beau/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf-g++)

set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)