$ locate SDL.h
/Applications/Sauerbraten/sauerbraten/sauerbraten.app/Contents/Frameworks/SDL.framework/Headers/SDL.h
/Applications/Sauerbraten/sauerbraten/sauerbraten.app/Contents/Frameworks/SDL.framework/Versions/Current/Headers/SDL.h
/Applications/Sauerbraten/sauerbraten/src/include/SDL.h
/Library/Frameworks/SDL.framework/Versions/A/Headers/SDL.h
/opt/local/include/SDL/SDL.h
/opt/local/var/db/dports/build/_opt_local_var_db_dports_sources_rsync.rsync.darwinports.org_dpupdate_dports_devel_libsdl-framework/work/SDL-1.2.9/include/SDL.h
/opt/local/var/db/dports/software/libsdl/1.2.11_0+darwin_8/opt/local/include/SDL/SDL.h
/sw/include/SDL/SDL.h
/usr/local/include/SDL/SDL.h