fceumm libretro-fceuumm  https://github.com/libretro/libretro-fceumm.git master PROJECT YES GENERIC Makefile.libretro . 
nestopia libretro-nestopia https://github.com/libretro/nestopia.git master PROJECT YES GENERIC Makefile libretro 
prboom libretro-prboom  https://github.com/libretro/libretro-prboom.git master PROJECT YES GENERIC_ALT Makefile .