${C}menu.o: ${C}revision.h
ppu.o: ppu.c ppu.h
+drivers/sdl/sdl.o: ${L}menu.h
+${L}menu.h:
+ @echo "please run: git submodule init; git submodule update"
+ @false
+
${C}revision.h: FORCE
@(git describe || echo) | sed -e 's/.*/#define REV "\0"/' > $@_
@diff -q $@_ $@ > /dev/null 2>&1 || cp $@_ $@