Please stay patient. I try to compile the sources myself. The current PPSSPP repo is a pain in the arse. First problem: You definitely need to compile ffmpeg from source because some libs are missing in the raspbian package. This took some time to find out. Second problem: cmake will not solve all dependencies. It is necessary to manually tune the Makefile. Third problem: There are GLES errors if you compile with USE_GLES. A header file must be tuned. Fourth problem: There are more than one build options. There are build scripts. You can use cmake. There seems to be no preferred solution for rpi. Fifth problem: There are many guys telling it runs after they have fiddled around with some files. But no one actually tells what he has changed.

PPSSPP repo is actually not ready for rpi. If it would it shouldn’t be necessary to do the whole mess.