[CMake] enable_language( ... OPTIONAL) causes error or second cmake run

[Alexander Neundorf]

On Tuesday 24 November 2009, Marcel Loose wrote:
> Hi all,
>
> I've been experimenting a bit with enable_language() and stumbled upon
> what I think is a bug.

Yes: http://public.kitware.com/Bug/view.php?id=9220

It's not trivial to make it work.

Alex