--- gui-x11/Makefile.orig 2015-05-13 14:54:57.102693961 +0200
+++ gui-x11/Makefile 2015-05-13 14:55:13.879692706 +0200
@@ -11,3 +11,6 @@
$(AR) r $(LIB) $(OFILES)
$(RANLIB) $(LIB)
+%.$O: %.c
+ $(CC) $(CFLAGS) $*.c
+