--- 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
+