From: Glenn Morris <[email-masked]>
Date: Mon, 30 Jun 2008 23:09:47 -0400

fixed 507 23.0.60
stop

2008-07-01  Glenn Morris  <[email-masked]>

    * configure.in (cpp_undefs): Rename from `undefs', update uses.
    Use $srcdir rather than $top_srcdir.  Set before calling AC_OUTPUT,
    and explicitly export there.  (Bug#507.)