From 5c788e7cf5026be1cad634f12bb42111a411cd9e Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Tue, 24 Aug 2010 18:06:12 +0000
Subject: [PATCH] When in automatic dependency mode, never delete any
 intermediate files automatically.  Otherwise, the following could happen:
 When starting from a clean source tree, the first build would delete the
 intermediate file, but also create the dependency file, which mentions the
 intermediate file, thus making it non-intermediate. The second build will
 then need to rebuild the now non-intermediate missing file.  So the second
 build will do work even though nothing had changed.  One place where this
 happens is the .c -> .o -> .so chain for some contrib modules.

---
 src/Makefile.global.in | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 280578a4c39..4fe2d75b03f 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -1,5 +1,5 @@
 # -*-makefile-*-
-# $PostgreSQL: pgsql/src/Makefile.global.in,v 1.264 2010/07/06 22:03:05 tgl Exp $
+# $PostgreSQL: pgsql/src/Makefile.global.in,v 1.265 2010/08/24 18:06:12 petere Exp $
 
 #------------------------------------------------------------------------------
 # All PostgreSQL makefiles include this file and use the variables it sets,
@@ -580,6 +580,17 @@ clean distclean maintainer-clean: clean-deps
 clean-deps:
 	@rm -rf $(DEPDIR)
 
+# When in automatic dependency mode, never delete any intermediate
+# files automatically.  Otherwise, the following could happen: When
+# starting from a clean source tree, the first build would delete the
+# intermediate file, but also create the dependency file, which
+# mentions the intermediate file, thus making it non-intermediate.
+# The second build will then need to rebuild the now non-intermediate
+# missing file.  So the second build will do work even though nothing
+# had changed.  One place where this happens is the .c -> .o -> .so
+# chain for some contrib modules.
+.SECONDARY:
+
 endif # autodepend
 
 
-- 
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