[llvm-branch-commits] [libcxx] release/20.x: [libc++] Avoid including <features.h> on arbitrary platforms (#125587) (PR #127310)

[Louis Dionne via llvm-branch-commits]

ldionne wrote:

Thanks for the heads up. I think we should merge this but also cherry-pick https://github.com/llvm/llvm-project/pull/127691 into LLVM 20 to fix that issue.

https://github.com/llvm/llvm-project/pull/127310