From mboxrd@z Thu Jan  1 00:00:00 1970
From: Achim Gratz <Stromeko@nexgo.de>
Subject: Re: absurd
Date: Mon, 10 Jun 2013 22:55:52 +0200
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Uwe Brauer writes:
> I don't understand:
>
> (defun my-test-if ()
>   (interactive)
>   (if (featurep 'xemacs)
>       (message "Xemacs")
>     (message "GNUS")))
>
>
> when executed in Xemacs returns Xemacs, when executed in GNU emacs returns
> GNUS.

Yes, but the byte-compiler has to compile both branches, since the if is
actually resolved at run-time.  You'd need to use a compatibility macro
to make that decision at compile-time and only use the XEmacs branch.
That was once in Org, but later reverted by Bastien.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

Wavetables for the Terratec KOMPLEXER:
http://Synth.Stromeko.net/Downloads.html#KomplexerWaves