I was able to find this Mupen core by following an old thread:
https://launchpad.net/~libretro/+archive/ubuntu/testing/+build/19252154
But when I try to run something on it, it seems to be an opengles version “Mupen64Plus GLES2”, and I don’t have opengles setup on my system for technical reasons. (and I can’t)
Is there some other version out there, or does anyone know a guide for the compile options for this core? Thanks.