[libcxx-commits] [libcxx] [libc++] Implement C++20 atomic_ref (PR #76647)

[Mark de Wever via libcxx-commits]

================
@@ -6,6 +6,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-threads
----------------
mordante wrote:

This test and several others fail on apple https://buildkite.com/llvm-project/libcxx-ci/builds/35217#_. These platforms lack synchronization. This should fix these builds.
```suggestion
// XFAIL: availability-synchronization_library-missing

```

https://github.com/llvm/llvm-project/pull/76647