From ac6808a73ef51e78080c7eae509831b00a4d8f7b Mon Sep 17 00:00:00 2001
From: Roy Marples <roy@marples.name>
Date: Fri, 16 Oct 2009 08:13:34 +0100
Subject: Regenerate version.h if necessary

---
 src/rc/Makefile | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/rc/Makefile b/src/rc/Makefile
index d9f8e11..9d33192 100644
--- a/src/rc/Makefile
+++ b/src/rc/Makefile
@@ -46,12 +46,17 @@ LDADD+=		${LIBDL} ${LIBKVM}
 include ${MK}/${MKPAM}.mk
 
 ${SRCS}: version.h
-version.h:
-	echo "#define VERSION \"${VERSION}${GITVER}\"" >version.h
+
+.PHONY:	version.h.tmp
+version.h.tmp:
+	echo "#define VERSION \"${VERSION}${GITVER}\"" >$@
 	if test -n "${BRANDING}"; then \
-		echo "#define BRANDING \"${BRANDING}\"" >> version.h; \
+		echo "#define BRANDING \"${BRANDING}\"" >> $@; \
 	fi
 
+version.h: version.h.tmp
+	cmp -s $@.tmp $@ && rm $@.tmp || mv $@.tmp $@
+
 install: all
 	${INSTALL} -d ${DESTDIR}${SBINDIR}
 	${INSTALL} -m ${BINMODE} ${PROG} ${DESTDIR}${SBINDIR}
-- 
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