ref: f7b8373ad7247dd5547e66d8ad0fe79b92277e8c
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