Cross-compiling for the Raspberry Pi

Compiling DUNE directly on the Raspberry Pi is possible, but soon becomes tedious, as it takes a while. Luckily there is an alternative, cross-compiling. The Raspberry Pi has an available toolchain at GitHub, but it uses a too old version of the gcc compiler, and therefore it will not compile DUNE. The solution to this, is to use the cross-compiler environment that is made for LSTS Glued.