[llvm-branch-commits] Prepare libcxx and libcxxabi for pointer field protection. (PR #151651)

[Nikolas Klauser via llvm-branch-commits]

https://github.com/philnik777 commented:

More generally, I feel like PFP needs its own `__config_site` instead of the ad-hoc annotations all around. @ldionne any thoughts?

https://github.com/llvm/llvm-project/pull/151651