From: Mike Frysinger <vapier@gentoo.org>
Date: Mon, 4 Feb 2008 22:44:23 +0000 (-0500)
Subject: only update version header as needed
X-Git-Tag: v1.3.2-rc1~14
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0ec7a061fb1c277f6afd73d61dd71bd21e7ef7b2;p=karo-tx-uboot.git

only update version header as needed

Constantly rebuilding the version header will force useless relinking, so we
simply need to compare the new header with the existing one before updating
it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/Makefile b/Makefile
index 9225a2d350..969ce42ec0 100644
--- a/Makefile
+++ b/Makefile
@@ -343,7 +343,8 @@ $(VERSION_FILE):
 		echo -n "$(U_BOOT_VERSION)" ; \
 		echo -n $(shell $(CONFIG_SHELL) $(TOPDIR)/tools/setlocalversion \
 			 $(TOPDIR)) ; \
-		echo "\"" ) > $(VERSION_FILE)
+		echo "\"" ) > $@.tmp
+		@cmp -s $@ $@.tmp && rm -f $@.tmp || mv -f $@.tmp $@
 
 gdbtools:
 		$(MAKE) -C tools/gdb all || exit 1