[clang] [Clang][CodeGen] Lookup standard library declarations for builtins to… (PR #204792)

[Hans Wennborg via cfe-commits]

zmodem wrote:

I'd like to see both issues (the non-determinism, and the direct calling of the library functions) fixed.

Can you expand on what "module map scanning" means (I'm not very familiar with modules), and how it can lead to different results?

https://github.com/llvm/llvm-project/pull/204792