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From: Per Abrahamsen <abraham@dina.kvl.dk>
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Subject: Re: Using CL in Gnus (was: gnus-agentize versus emacs 20 mapc)
Date: Sun, 30 Nov 2003 14:22:42 +0100
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The only Emacs where we need to worry about not including the cl
runtime is "the next version of GNU Emacs".

RMS do not want the cl namespace to clutter the pristine GNU Emacs,
which mean that Gnus that the bundled version of Gnus should not load
the cl runtime.  Since this list concern the development version of
Gnus, which will be available unbundled for older Emacsen and bundled
only in a future Emacs release, the "future Emacs release" is the only
version where we need to avoid cl.

In other words, using functions like mapc that requires the cl runtime
in older Emacsen (or XEmacs) are fine, as long as they don't require
cl in the CVS version of Emacs.