Terry Hendrix II 🏹 (thendrix@social.hendrixgames.com)'s status on Friday, 18-Aug-2023 09:10:21 JST

You have to use -D syntax for cmake iirc.

Also use godbolt to verify flags like… ah… This should still work – but you can use per func attr to markup for SSE level – eg:

-xc -Wall -O3 -march=Skylake

I would look up exact arch and flags you want for specific version of clang.