[lld] [LLD][COFF] Add -build-id flag to generate .buildid section. (PR #71433)

[Martin Storsjö via llvm-commits]

https://github.com/mstorsjo commented:

The MinGW side parts LGTM, with a few minor comments on the test.

For the COFF side (sorry for forgetting to recheck that one earlier), I think the changes are ok, but I'd appreciate if someone else who is familiar with those parts wants to have a look at those bits as well. If not I guess I can give it a second closer look.

There's some restructurings for how the different hashes/structures are made (I presume since you're not reusing the chunks but creating two separate sets, if needed) - have you checked that the output is binary identical to before (where applicable)?


https://github.com/llvm/llvm-project/pull/71433