sci-physics/bullet-2.83.4 compiles and installs fine on PowerPC (PowerBook G4). dev-libs/efl built with "physics" USE flag enabled runs fine using this library (ie enlightenment runs OK when linked against that library). Furthermore, this package is already keyworded for ~ppc64. Then, please consider adding ~ppc keyword to this package.
~ppc keyworded Lat arch. Closing.