mame2003 libretro-mame2003 https://github.com/libretro/mame2003-libretro.git PROJECT YES GENERIC Makefile . 
mame2010 libretro-mame2010 https://github.com/libretro/mame2010-libretro.git PROJECT YES GENERIC Makefile.libretro . VRENDER=soft emulator 
scummvm libretro-scummvm  https://github.com/libretro/scummvm.git PROJECT YES GENERIC Makefile backends/platform/libretro/build