问题
I am working on a CMake project for Windows which uses 'NMake' as generator.
Inside my CMake I have to setup variables differently based on the specific version of Visual C++ which will compile the code. Specifically I am using Visual Studio 2017 and Visual Studio 2013.
How can I distinguish withing the CMakeLists.txt when NMake is generating its files for Visual Studio 2017 instead of Visual Studio 2013?
Is there any CMake variable I can read to know which version of Visual C++ will be used?
Is there maybe a NMake version under CMAke?
Unfortunately I have to stick to 'NMake' generator and I cannot switch to the two generators which would solve easily my problem which are 'Visual Studio 15 2017 Win64' and 'Visual Studio 12 2013 Win64'.
来源：https://stackoverflow.com/questions/47145999/how-cmake-can-check-which-visual-c-version-runs-behind-nmake