X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=rhel%2Fautomake.mk;h=d3c089b5d12288f4957f8c58bc82cad48e437e7a;hb=215d7280e4068ba3f2ce1efd5a8f5dede4055423;hp=d4d59613ecf31e19082ba6c824b8c02fb5fda7a1;hpb=c434706a374bd44d1274e7bdbee40067a6620b61;p=openvswitch

diff --git a/rhel/automake.mk b/rhel/automake.mk
index d4d59613..d3c089b5 100644
--- a/rhel/automake.mk
+++ b/rhel/automake.mk
@@ -18,13 +18,16 @@ EXTRA_DIST += \
 	rhel/openvswitch.spec.in \
 	rhel/usr_share_openvswitch_scripts_sysconfig.template
 
+update_spec = \
+  ($(ro_shell) && sed -e 's,[@]VERSION[@],$(VERSION),g') \
+    < $(srcdir)/rhel/$(@F).in > $(@F).tmp || exit 1; \
+  if cmp -s $(@F).tmp $@; then touch $@; rm $(@F).tmp; else mv $(@F).tmp $@; fi
 
 $(srcdir)/rhel/openvswitch-kmod-rhel5.spec: rhel/openvswitch-kmod-rhel5.spec.in $(top_builddir)/config.status
-	sed -e 's,[@]VERSION[@],$(VERSION),g' < $< > $@
+	$(update_spec)
 
 $(srcdir)/rhel/openvswitch-kmod-rhel6.spec: rhel/openvswitch-kmod-rhel6.spec.in $(top_builddir)/config.status
-
-	sed -e 's,[@]VERSION[@],$(VERSION),g' < $< > $@
+	$(update_spec)
 
 $(srcdir)/rhel/openvswitch.spec: rhel/openvswitch.spec.in $(top_builddir)/config.status
-	sed -e 's,[@]VERSION[@],$(VERSION),g' < $< > $@
+	$(update_spec)