From e53e397a96e507584023d36413c5db9eaac8693c Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Fri, 22 Oct 2004 23:06:30 +0000
Subject: [PATCH] Make sure that we don't set up a circular dependency if
 OBJDIR == SRCDIR

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17172 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.rules | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Makefile.rules b/Makefile.rules
index 01a99418c32..cd82e139582 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -762,6 +762,7 @@ $(MAKE_CONFIG): $(MAKE_CONFIG_IN)
 #------------------------------------------------------------------------
 # If the Makefile in the source tree has been updated, copy it over into the
 # build tree.
+ifneq ($(OBJMKFILE),$(SRCMKFILE))
 .PRECIOUS: $(OBJMKFILE)
 $(OBJMKFILE): $(SRCMKFILE)
 	@$(ECHO) "Updating Makefile from : $(dir $<)"
@@ -769,6 +770,7 @@ $(OBJMKFILE): $(SRCMKFILE)
 	$(VERB) cp -f $< $@
 	$(VERB) $(MAKE) $(MAKEFLAGS) $(MAKECMDGOALS)
 	@exit 0;
+endif
 
 ###############################################################################
 # MISCELLANEOUS - utility targets