как собрать?

$ gcc test.c
test.c:1:49: SDL.h: No such file or directory
test.c: In function `main':
test.c:9: error: `SDL_INIT_VIDEO' undeclared (first use in this function)
test.c:9: error: (Each undeclared identifier is reported only once
test.c:9: error: for each function it appears in.)
test.c:9: error: `SDL_INIT_AUDIO' undeclared (first use in this function)
$ ls /usr/include/SDL/SDL.h
/usr/include/SDL/SDL.h
$

пробовал добавлять -L/usr/include/SDL и -lSDL - безрезультатно