deleted file mode 100755
--- a/lib/interlock
+++ /dev/null
@@ -1,46 +0,0 @@
-#! /bin/sh
-
-# interlock - wrap program invocation in lock to allow
-#             parallel builds to work.
-# Written by Tom Tromey <tromey@cygnus.com>, Aug 10 1996
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-# Usage:
-#   interlock lock-dir-name program args-to-program...
-
-dirname="$1"
-program="$2"
-
-shift
-shift
-
-while (mkdir $dirname > /dev/null 2>&1 && exit 1 || exit 0); do
-   # Wait a bit.
-   sleep 1
-done
-
-# Race condition here: if interrupted after the loop but before this
-# trap, the lock can be left around.
-trap "rmdir $dirname > /dev/null 2>&1" 1 2 3 15
-
-# We have the lock, so run the program.
-$program ${1+"$@"}
-ret=$?
-
-# Release the lock.
-rmdir $dirname > /dev/null 2>&1
-
-exit $ret