[Lumiera] Ichthyo: Removing lumigui from scons

[Christian Thaeter]

Ichthyostega wrote:
>> and is there any chance of getting precompiled headers working? The GUI
>> library includes are quite heavyweight.
> I saw them working, but I've hit a nice gcc segfault when enabling them
> in some cases. That's why I've disabled this builder (and wanted to
> re-investigate and maybe open a bug report when I've got some spare time)
> Anyway, for my part the savings where not really large, probably because
> I was careful, especially with boost includes. But you are right, GTK might
> be another story. We might just try it out, maybe it works for your case;
> the GCH builder (plugin) is still active, I've just commented out the target
> which activates building the precompiled headers.

Is there any benefit using precompiled headers when ccache is used? if
so I could add it to autotools too but I have some doubts and i often
heard people complaining about flacky implementation.

	Christian