From 28d582acd98d49e80ce5728d5a6b4ed035a9e357 Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Sun, 17 Feb 2002 16:20:39 +0000
Subject: ($(DOMAIN).pot-update): Remove/replace the .pot file only if the new
 one is different (modulo the creation date).

---
 po/Makefile.in.in | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/po/Makefile.in.in b/po/Makefile.in.in
index e95553267..f68983ca4 100644
--- a/po/Makefile.in.in
+++ b/po/Makefile.in.in
@@ -82,8 +82,13 @@ $(DOMAIN).pot-update: $(POTFILES) $(srcdir)/POTFILES.in
 	  --files-from=$(srcdir)/POTFILES.in \
 	  --copyright-holder='$(COPYRIGHT_HOLDER)' \
 	&& test ! -f $(DOMAIN).po \
-	   || ( rm -f $(srcdir)/$(DOMAIN).pot \
-		&& mv $(DOMAIN).po $(srcdir)/$(DOMAIN).pot )
+	   || ( if diff -u -IPOT-Creation-Date: \
+	      	     $(DOMAIN).po $(srcdir)/$(DOMAIN).pot>/dev/null 2>&1;then \
+		  rm -f $(DOMAIN).po; \
+		else \
+	          rm -f $(srcdir)/$(DOMAIN).pot; \
+		  mv $(DOMAIN).po $(srcdir)/$(DOMAIN).pot; \
+		fi )
 
 $(srcdir)/$(DOMAIN).pot:
 	$(MAKE) $(DOMAIN).pot-update
-- 
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