[CMake] CMake and multiple Microsoft compilers on windows

[John Drescher]

> OK, I am pretty sure (99.9%) it is not actually using that compiler for the
> tests.  The CMAKE_CXX_COMPILER value is not actually used by the visual
> studio IDE projects.  However, that does seem to be some disturbing
> output....  I need to change the platform files so that the cl full path is
> not searched for.  Please create a bug report.
>

http://public.kitware.com/Bug/view.php?id=8775

> If you want to prove it to yourself you can run cmake with
> --debug-trycompile and look at the projects it is using for trycompiles.
>

I will try that on Monday if I remember.

John