ref: 739134e68a978edda2b7b8f60cb07886073cffe6
dir: /external/SDL2/debian/libsdl2-dev.install/
usr/bin/sdl2-config usr/include/SDL2 usr/lib/*/*.a usr/lib/*/*.la usr/lib/*/*.so usr/lib/*/pkgconfig/sdl2.pc usr/lib/*/cmake/SDL2/sdl2-config.cmake usr/share/aclocal/sdl2.m4