[libcxx-commits] [libcxxabi] [libc++abi] Revert gating of `__cxa_thread_atexit` on Linux||Fuchsia (PR #186054)

[Guillaume Outters via libcxx-commits]

outtersg wrote:

@whitequark wrote:

> My position is that right now an architecture is _broken_. We should fix that first and then discuss a cleaner solution later.

I'm semi-agreeing with that:
on one hand, the initial culprit change dates back 12 years ago, and I'm militating to repair the build on another platform which is nearly as old;
on the other hand, won't we have other platforms that will emerge as broken, and require transforming the `#if` in a chaplet of opted-in platforms?

https://github.com/llvm/llvm-project/pull/186054