Maybe we should ask author of this "DOSBox Turbo" (ARMv7 optimised DOSBox with full x86 CPU emulator!) , which runs smoothly DOOM2, UFO and nearly everything... (with FRAMESKIP = 6) on my 4.0.3 ICSandwitch powered "HTC One-V" with ARMv7 1 GHz CPU and 256 MB RAM... to just compile this outstanding pi...