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From: David Kastrup <dak@gnu.org>
Newsgroups: gmane.emacs.help
Subject: Re: Query emacs to find if it was built with X support?
Date: Sat, 09 Apr 2011 11:58:00 +0200
Organization: Organization?!?
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Robert Knighten <RLK@knighten.org> writes:

> The subject tells it all.  Is there some way to query a pre-built emacs
> to find out if it was built with X support?

Possibly
(assq 'x window-system-initialization-alist)

-- 
David Kastrup