Add Preprocessor option for MSVC in CMakeLists.txt

[Lubart]

Can preprocessor option (Enable preprocessor conformance mode) be added to CMakeLists.txt.
That option is:

if (MSVC)
add_compile_options(/Zc:preprocessor)
endif()

In order to have it already in VC project options.
https://learn.microsoft.com/en-us/cpp/build/reference/zc-preprocessor?view=msvc-170

[matty0ung]

Sorry you didn't get a reply on this before. The main reason we don't support MSVC out of the box is that I haven't worked out how to script all the installation etc. At some point, I would love to get the build working on MSVC so that we're compiling on all three mainstream C++ compilers, but, realistically, it's going to be a while before that gets to the top of my to-do list. In the meantime, I'm happy to look at PRs if you or anyone else want to take a shot at doing this.