/usr/include/SDL# ls -a
.                       SDL_config_macos.h    SDL.h           SDL_opengl.h
..                      SDL_config_macosx.h   SDL_joystick.h  SDL_platform.h
begin_code.h            SDL_config_minimal.h  SDL_keyboard.h  SDL_quit.h
close_code.h            SDL_config_os2.h      SDL_keysym.h    SDL_rwops.h
SDL_active.h            SDL_config_win32.h    SDL_loadso.h    SDL_stdinc.h
SDL_audio.h             SDL_copying.h         SDL_main.h      SDL_syswm.h
SDL_byteorder.h         SDL_cpuinfo.h         SDL_mixer.h     SDL_thread.h
SDL_cdrom.h             SDL_endian.h          SDL_mouse.h     SDL_timer.h
SDL_config_amiga.h      SDL_error.h           SDL_mutex.h     SDL_types.h
SDL_config_dreamcast.h  SDL_events.h          SDL_name.h      SDL_version.h
SDL_config.h            SDL_getenv.h          SDL_net.h       SDL_video.h