Standalone port of Mednafen GBA to libretro, itself a fork of VBA-M,
itself a fork of Visual Boy Advance.

Beetle/Mednafen GBA optionally supports using the following BIOS image
file for operation:

* gba_bios.bin (Game Boy Advance Image)

To build the debugging symbols use:
  DEBUG=1 ./beetle-gba-libretro.SlackBuild