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From: "Stephen J. Turnbull" <stephen@xemacs.org>
Newsgroups: gmane.emacs.devel
Subject: Re: A plea for dynamically loadable extension modules
Date: Sun, 19 Aug 2007 16:59:15 +0900
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Cc: emacs-devel@gnu.org, Leo <sdl.web@gmail.com>,
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To: dhruva <dhruvakm@gmail.com>
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Xref: news.gmane.org gmane.emacs.devel:76742
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dhruva writes:

 > Would [restricting linakge to modules containing a specific
 > function] be a feasible approach?

I certainly hope not.  That's a link-time or run-time restriction.
The GPL only covers copying and distribution activity.