[CMake] Rediscovering the compiler.

[Bill Hoffman]

Josef Karthauser wrote:
> Is there a canonical way of forcing cmake (2.4.7) to rediscover the 
> compiler, without blowing the CMakeCache and build directory away 
> altogether and starting again?
> 
> I guess that there are a few variables which if I reset them will drive 
> this behaviour.  Which ones are sufficient?
> 

No, there is no way currently in cmake to switch compilers once picked...

-Bill