Smarter fig2dev detection

[Werner Koch]

On Wed, 20 Mar 2013 18:34, lrn1986 at gmail.com said:
> libgcrypt documentation fails to build when fig2dev is not available,
> because fig2dev is used unconditionally.

I know, this eventually needs to be fixed.

> Here's an easy fix for this, which detects fig2dev at configure time,

If you want your patch to be included you need to follow the procedure
in doc/HACKING.  We can't accept pseudonyms or anonymous contributions;
if that is a problem for you, you need to find a proxy.


Shalom-Salam,

   Werner

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