[CMake] cmake on Windows x64

[John Drescher]

> I noticed that there is cmake binary package for Windows x64. Should a
> 32-bit cmake (under syswow6432) be adequate for all cmake tasks? If
> not, what is the right way to build cmake for 64-bit. I tried building
> it on a 32-bit build server using the 64 bit generator (this build
> server routinely does 64-bit cross compiles). However, apparently some
> of the products of the 64-bit build are run to generate sources that
> are built by other parts of the build. This being a 32-bit box does
> not allow that and hence the cross-compile to 64-bit failed.
>

32 bit cmake works fine for 64 bit builds on x64. I use this almost
every day for the last 3+ years..

John