[libcxx-commits] [libcxx] [libc++][C++03] Cherry pick #164272 (PR #164447)

[Nikolas Klauser via libcxx-commits]

philnik777 wrote:

> > This shouldn't have been landed.
> 
> Sorry, I will wait for second approval on this next time.

No worries, it's not super clear what's up with the C++03 headers for most people.

> > We should fix the C++03 headers, not back-port NFC changes.
> 
> I'm not sure I follow. Do you mean we should only backport functional changes?

Yes. they're currently not quite working, so we should first fix them, and if we deem it worth it we can clean them up afterwards.

https://github.com/llvm/llvm-project/pull/164447