[CMake] Using gcc as an alternative compiler on windows

[John Drescher]

>> To add an additional option I have successfully used QtCreator (which
>> builds using MinGW) on windows with cmake. It supports CMakeLists.txt
>> files directly. I would call it work in progress as far as the CMake
>> support.
>
> What's not working ?
> (it works off the same CodeBlocks files)
>

The building works fine. qtcreator does not seem to handle debug, and
release in an easy way and also by default it does an in source build.
I know I had other issues but I have not played with this in a few
weeks so I do not remember.

John