From 3690019da8b6993c4a13298851fa4bca1ef17edc Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Tue, 26 Feb 2008 07:20:38 +0000
Subject: [PATCH] We don't need to rebuild objfiles.txt every time an object
 file changes. So only rebuild when a makefile changes (which presumably
 defines the file list somewhere), and only touch the file if an object
 changed. The touch is necessary so the parent make knows something changed
 and ultimately rebuilds postgres.

---
 src/backend/common.mk | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/backend/common.mk b/src/backend/common.mk
index 9fdfa8623fc..c34d62b95d8 100644
--- a/src/backend/common.mk
+++ b/src/backend/common.mk
@@ -1,7 +1,7 @@
 #
 # Common make rules for backend
 #
-# $PostgreSQL: pgsql/src/backend/common.mk,v 1.2 2008/02/25 17:55:42 petere Exp $
+# $PostgreSQL: pgsql/src/backend/common.mk,v 1.3 2008/02/26 07:20:38 petere Exp $
 #
 
 # When including this file, set OBJS to the object files created in
@@ -26,9 +26,12 @@ endif
 SUBSYS.o: $(SUBDIROBJS) $(OBJS)
 	$(LD) $(LDREL) $(LDOUT) $@ $^
 
-objfiles.txt: $(SUBDIROBJS) $(OBJS)
+objfiles.txt:: $(MAKEFILE_LIST)
 	( $(if $(SUBDIROBJS),cat $(SUBDIROBJS); )echo $(addprefix $(subdir)/,$(OBJS)) ) >$@
 
+objfiles.txt:: $(SUBDIROBJS) $(OBJS)
+	touch $@
+
 # make function to expand objfiles.txt contents
 expand_subsys = $(foreach file,$(filter %/objfiles.txt,$(1)),$(patsubst ../../src/backend/%,%,$(addprefix $(top_builddir)/,$(shell cat $(file))))) $(filter-out %/objfiles.txt,$(1))