[lld] [LLD] [COFF] Warn if the runtime pseudo relocation function is missing (PR #88573)

[via llvm-commits]

jeremyd2019 wrote:

> > Alternatively, we could also make this situation a hard error.
> 
> I think a hard error is probably better ...

I agree.  Since I have been dealing with it lately, I am a little concerned if this will be an issue for rust.  I imagine not, because it does usually work with ld.bfd, and this is a hard error there.

https://github.com/llvm/llvm-project/pull/88573