[libcxx-commits] [compiler-rt] [libcxxabi] [libunwind] [runtimes][PAC] Harden unwinding when possible (#138571) (PR #143230)

[Oliver Hunt via libcxx-commits]

ojhunt wrote:

unused variable errors are likely fallout from refactoring and workaround removals I did as part of the prep, will do some cleanup/diagnostics work later this week.

I mostly wanted to get this available to others to see whether they were ok adopting this rather than rolling their own version.

https://github.com/llvm/llvm-project/pull/143230