[compiz] glu dependency

[David Reveman]

On Thu, 2007-04-26 at 08:43 +0200, Danny Baumann wrote:
> Hi,
> 
> > The following commit seems to have added a dependency on glu but does
> > no checks to see if it is actually available:
> > 
> > commit fa5bf5754d8a2e47d659a3abe5cb59a7b0e304d7
> > Author: David Reveman <davidr at novell.com>
> > Date:   Tue Jan 16 06:07:39 2007 +0100
> > 
> >     Project vertices and only update minimum required destination texture
> >     region. Some more optimizations should be done here but the current
> >     changes should still give a major performance improvement.
> > 
> > 
> > My autofoo is very much lacking so I'm not sure how to add such a check.
> 
> Problem here is that GLU does not provide a pkg-config .pc file which is
> needed to check a libraries availability through configure.ac. libjpeg
> has the same problem, BTW.
> We could add a check for the header file presence, but I am not sure if
> this is a proper solution or is somewhat kludgy.

A header check or a compile check is better than nothing. We should look
at what some other projects that use GLU are doing.

- David