[CMake] /MP[num_threads] not working in Cmake 3.0.0

[Jaime Armendariz]

Hello,

I would like to apply the switch "/MP[n]" for setting the number of
cores to be used in a compilation, however it does not behave
correctly.

If I add "/MP4" for example in my${CMAKE_CXX_FLAGS_RELEASE}, cmake
converts it to "/MP" that means "all cores available".

It's like it is not parsing the number but it correctly parses the /MP.


Tested with :

Cmake  3.0.0 and 2.8.12.2

Windows 7 64 bits

Visual Studio 2013 / Visual Studio 2010 SP1
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