MSVC projects: Make helper NMake Makefiles more robust and faster
Hi,
This attempts to improve the helper NMake Makefiles by doing the following:
- When we generate NMake Makefile snippts, add the Visual Studio toolset version and platform config to the filenames, so that it will be far less likely to trip up the snippets if multiple build instances trigger the NMake Makefiles at the same time.
- Make the code generating phase faster by reorganizing some rules, so that we do not need to needlessly reload the source listings.
With blessings, thank you!