[lld] [llvm] [lld][AArch64][Build Attributes] Add support for converting AArch64 Build Attributes to GNU Properties (PR #131990)

[via llvm-commits]

sivan-shani wrote:

> This is missing tests for:
> - The warnings for invalid attributes

--> Not relevant anymore, checks are not done in lld (compiler behavior will be changed to err on unknown tags in non-optional subsection)

> - Mixing GNU properties with build attributes, both within one object file and as different input files

--> done

> - The effect of build attributes on a non-partial link. There are probably existing tests for PAC/BTI/GCS/pauthabi which you could extend to check that they get enabled by build attributes as well as GNU properties

--> todo

https://github.com/llvm/llvm-project/pull/131990