Simplify preprocessor logic #198

Job	Run time
linux_gcc_sanitizers	2m 15s
linux_gcc_valgrind	1m 13s
linux_clang (ubuntu-latest, Debug)	3m 19s
linux_gcc (ubuntu-latest, Debug)	4m 28s
linux_clang (ubuntu-latest, Release)	1m 13s
macos_clang (macos-latest, Debug)	3m 18s
linux_gcc (ubuntu-latest, Release)	2m 33s
windows_mingw64 (windows-latest, Debug)	5m 13s
macos_clang (macos-latest, Release)	1m 10s
windows_mingw64 (windows-latest, Release)	2m 56s
windows_msvc2022	2m 25s
	30m 3s

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