From 7505e5d0cdd93a987b0318c379636febdd61c7fb Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Mon, 10 Sep 2001 23:28:59 +0000
Subject: [PATCH] Make prep_buildtree harmless when run on top of the source
 tree.

from Ian Lance Taylor
---
 config/prep_buildtree | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/config/prep_buildtree b/config/prep_buildtree
index 7dbcf3166e..57d7719673 100644
--- a/config/prep_buildtree
+++ b/config/prep_buildtree
@@ -30,9 +30,11 @@ for item in `find "$sourcetree" -type d \( -name CVS -prune -o -print \)`; do
 done
 
 for item in `find "$sourcetree" -name Makefile -print -o -name GNUmakefile -print`; do
-    subdir=`expr "$item" : "$sourcetree\(.*\)"`
+    filename=`expr "$item" : "$sourcetree\(.*\)"`
     if test ! -f "${item}.in"; then
-        ln -fs "$item" "$buildtree/$subdir" || exit 1
+        if cmp "$item" "$buildtree/$filename" >/dev/null 2>&1; then : ; else
+            ln -fs "$item" "$buildtree/$filename" || exit 1
+        fi
     fi
 done