[libcxx-commits] [libcxx] Add [[clang::lifetimebound]] to numerous functions in libc++ include headers (PR #112751)

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tazjin wrote:

> Could you elaborate a bit on this? Did you run into any blockers?

I can also add to this that I cherry-picked some of these changes into the Yandex codebase (very large mostly C++ monorepo with O(thousands) of services), and ran into a substantial number of false positives with many of the annotations.

It seems that in general LLVM  is pursuing a slightly different path of adding lifetimebound metadata within compiler logic, instead of within the libc++ source code, see for example this PR (which is already included in the latest release): https://github.com/llvm/llvm-project/pull/103716/

https://github.com/llvm/llvm-project/pull/112751