We use the same configuration tests on all platforms in an effort to avoid having large chunks of platform-specific code in our build files, but we pay a price for this on Windows - the same test process is more than an order of magnitude slower with MSVC than (say) Linux.
Does CMake launch the MSVC C++ compiler each time it needs to do a TRY_COMPILE or similar test? If so, does anybody know of any techniques for combining tests or some way to run a cl.exe instance as a "daemon" to which multiple files can be fed without needing a full restart of cl.exe? Cheers, CY
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