[libcxx-commits] [libcxx] [libc++] Allow the use of extensions in the implementation (PR #79532)

[Mark de Wever via libcxx-commits]

mordante wrote:

> @mordante @philnik777 I'd be fine to wait until after we have `18.1.0` released (maybe 1-2 weeks after that) before we actually merge this. At this point we've been waiting for long enough that a few weeks is not going to make much of a difference.
> 
> For what it's worth, I have been deploying LLVM 18 on a large code base internally and didn't see any issues around the use of these extensions, so I am not too concerned at this point. But I agree that a full point release would make sense before we actually merge this.

Thanks for testing this. My main concern was never with users who we know about, but about the users we don't know about.

https://github.com/llvm/llvm-project/pull/79532