From 1b4357f45235dffa968a5bf373a21ac318542cd9 Mon Sep 17 00:00:00 2001
From: Jim Blandy <jimb@redhat.com>
Date: Sun, 30 May 1993 18:24:08 +0000
Subject: [PATCH] * configure.in: Complain if srcdir points at an
 already-configured 	tree.

---
 configure1.in | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/configure1.in b/configure1.in
index 4251cac07d1..9badb35e10d 100755
--- a/configure1.in
+++ b/configure1.in
@@ -354,6 +354,14 @@ case "${srcdir}" in
   *  ) srcdir="`(cd ${srcdir}; pwd)`" ;;
 esac
 
+#### Make sure that the source directory doesn't already have a
+#### configured system in it.
+if [ -f "${srcdir}/src/config.h" ] ; then
+  (echo "${progname}: the directory tree \`${srcdir}' is being used as a build"
+   echo "  directory right now; it has been configured in its own right."
+   echo "  You can't use srcdir in this situation.") >&2
+  exit 1
+fi
 
 ### Make the necessary directories, if they don't exist.
 if [ ! -d ./src ]; then
-- 
2.30.2