[libcxx-commits] [libcxx] [libc++] Fix Newlib check in __fwd/ios.h (PR #168952)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 requested changes to this pull request.

I'm pretty sure #147956 fixes your problems.

https://github.com/llvm/llvm-project/pull/168952