$(C) devices/render.c -o devices/render.$(O)
devices/opengl.$(O): devices/opengl.c devices/opengl.h
$(C) devices/opengl.c -o devices/opengl.$(O)
-devices/arts.$(O): devices/arts.c devices/arts.h
+devices/arts.$(O): devices/arts.c devices/arts.h devices/artsutils.c
$(C) devices/arts.c -o devices/arts.$(O)
devices/record.$(O): devices/record.c devices/record.h
$(C) devices/record.c -o devices/record.$(O)