[CMake] MinGW Compilers on Windows

[Kevan Hashemi]

Dear Konstantin,

> Of course, but you should choose a suitable generator, e.g. -G "MinGW Makefiles"

That makes perfect sense. Indeed, having selected "MinGW Makefiles" I don't evgen have to specify 
the compilers, I can say "use native compilers". I also had to add MinGW/bin to the Winodws path, so 
that CMake could run the native compilers and test them without launching MSYS.

Thank you, Kevan

-- 
Kevan Hashemi, Electrical Engineer
Physics Department, Brandeis University
http://alignment.hep.brandeis.edu/