diff -r 000000000000 -r 6474c204b198 build/autoconf/clean-config.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/autoconf/clean-config.sh	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# clean-config.sh - Removes all files generated by mozilla configure.
+#    Only removes files from the topsrcdir. To clean up an objdir,
+#    simply remove the directory and start over.
+#
+# Usage:
+#    1. cd <topsrcdir>
+#    2. build/autoconf/clean-config.sh
+#
+# Send comments, improvements, bugs to slamm@netscape.com
+
+topsrcdir=`cd \`dirname $0\`/../..; pwd`
+
+if [ ! -f configure.in ]; then
+  echo "clean-config.sh only cleans the source tree. To run," 2>&1
+  echo "  cd $topsrcdir; build/autoconf/clean-config.sh" 2>&1
+  echo "  (To clean a separate objdir, simple remove the directory.)" 2>&1
+  exit 1
+fi
+
+rm -fr \
+    config-defs.h \
+    config.cache \
+    config.log \
+    config.status \
+    $NULL