C++ compatibility build

Fix C++ version detection for MSVC #4848

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Run time

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Job	Run time
MSVC C++20	7m 19s
MSVC C++17	5m 55s
Unix C++20	7m 30s
MSVC C++14	6m 18s
Unix C++14	7m 18s
Unix C++17	6m 54s
	41m 14s