From f48d512223ca6436b265017b04a9d3956afb764c Mon Sep 17 00:00:00 2001
From: Sascha Kruse <knopwob@googlemail.com>
Date: Mon, 16 Jun 2014 22:00:42 +0200
Subject: [PATCH] Abort build if config.h needs to be updated

close #179

Thanks progandy
---
 Makefile | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 2f77570..0c3a9f5 100644
--- a/Makefile
+++ b/Makefile
@@ -33,9 +33,10 @@ options:
 
 ${OBJ}: config.h config.mk
 
-config.h:
-	@echo creating $@ from config.def.h
-	@cp config.def.h $@
+config.h: config.def.h
+	@if test -s $@; then echo $< is newer than $@, merge and save $@. If you haven\'t edited $@ you can just delete it	&& exit 1; fi
+	@echo creating $@ from $<
+	@cp $< $@
 
 dunst: ${OBJ}
 	@echo "${CC} ${CFLAGS} -o $@ ${OBJ} ${LDFLAGS}"