bug#24455: 25.1.50; No error if --with-imagemagick not obeyed

[Lars Ingebrigtsen <larsi@gnus.org>]

Óscar Fuentes <ofv@wanadoo.es> writes:

> If we require ImageMagick support with --with-imagemagick and no usable
> Imagemagick is found, the configuration will carry on.
>
> IMO if the user requires a feature and that requirement can't be obeyed,
> an error should be thrown and configuration should stop.

Makes sense to me.

I've now changed it so that you get

./configure --with-imagemagick
[...]
checking for Wand >= 6.3.5 Wand != 6.8.2... no
configure: error: ImageMagick wanted, but it does not compile.  Maybe some library files are missing?

if you don't have the ImageMagick libraries.  If you don't say
--with-imagemagick, you should be unaffected.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no