[libcxx-commits] [libcxx] [libc++] Remove ios_base::__xindex_ from the ABI (PR #198994)

[Volodymyr Turanskyy via libcxx-commits]

voltur01 wrote:

Thank you for the clarification! Yes, for now we build for single threaded, however support for multithreading is on the to-do list, so avoiding threading would not be a solution long term.

To solve the immediate problem, we are providing a fallback libatomic implementation for Armv4/5/6 which effectively ignores atomicity, but gives users a chance to override as it fits their needs.

https://github.com/llvm/llvm-project/pull/198994