[CMake] Parallel builds

[Petr Bena]

Hi,

Is it possible to enable multithreaded builds by default in Visual
Studio projects? It seems that cmake generates the solution files in a
way that they are forbidden, so even if global preference is to use
multithreaded builds, the compiler never does that for sln files
create by cmake, because multithreaded builds are not allowed on
project level.

Is there any way to enable them so that I don't have to do that by
hand all time?