Correct usuage of target_compile_option MP for Visual Studio

[Angew (Petr Kmoch)]

@Steven_White

1. Should the variable expansion in a generator expression work as in the above code?
2. Does anyone know what file or where in the UI can confirm the MP limit if one is given to speed up debugging of the issue?

1. Yes, it should work. But note that the expansion will happen immediately, i.e. at configure time when the generator expression is defined, not at generate time when it’s epxanded & used. So the variable must be set correctly at the time the target_compile_options() call happens. I would double-check that the variable holds what you think it does at that point.

2. I can confirm I can’t see the number anywhere in the UI either. However, it’s present in the generated .vcxproj in a <ProcessorNumber> element, so you can check that using a text editor or XML viewer.