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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.help
Subject: Re: How check when symbol is introduced in Emacs?
Date: Wed, 19 Jan 2011 10:19:27 -0500
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In-reply-to: <ih6e3r$pus$1@dough.gmane.org> (message from Oleksandr Gavenko on
	Wed, 19 Jan 2011 12:23:59 +0200)
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> From: Oleksandr Gavenko <gavenko@bifit.com.ua>
> Date: Wed, 19 Jan 2011 12:23:59 +0200
> 
> Usually I get Error with previous Emacs version when symbol is undefined.
> 
> To workaround I use code like:
> 
> (when (or (>= emacs-major-version 23)
>                    (and (= emacs-major-version 22) (>= 
> emacs-minor-version 2)))
>     (setq 'symb val)
>    )
> 
> But I must know low limit of version to get better code.

Why not use `boundp'?