Subject: bug#4268: USE_LISP_UNION_TYPE needs to be enabled by a ./configure flag

From: Dan Nicolaescu <[email-masked]>
Date: Wed, 26 Aug 2009 13:00:14 -0700 (PDT)

As the subject says...
Should it be a option for --enable-checking or an independent flag like
--enable-use-lisp-union-type ?