On my distribution the SDL includes are installed under /usr/include/SDL
and aren't found because the sources use #include <SDL.h>. I temporarly
fixed that by putting -I/usr/include/SDL to the CFLAGS in config/config.mk.
There exists a script called sdl-config which can output all include-paths
and so on. Perhaps that should be used to detect the sdl-installation and
configure the CFLAGS.
On my distribution the SDL includes are installed under /usr/include/SDL and aren't found because the sources use #include <SDL.h>. I temporarly fixed that by putting -I/usr/include/SDL to the CFLAGS in config/config.mk.
There exists a script called sdl-config which can output all include-paths and so on. Perhaps that should be used to detect the sdl-installation and configure the CFLAGS.