[libcxx-commits] [libcxx] [libc++] Adds shared resource helper. (PR #72529)

[Louis Dionne via libcxx-commits]

================
@@ -533,6 +533,15 @@ def check_gdb(cfg):
             cfg.available_features,
         ),
     ),
+    # Tests that require the shared_resource in the built library
+    Feature(
+        name="availability-shared_resource-missing",
+        when=lambda cfg: BooleanExpression.evaluate(
+            # TODO(ldionne) Please provide the correct value.
----------------
ldionne wrote:

```suggestion
            # TODO(ldionne): Update once this has shipped.
```

https://github.com/llvm/llvm-project/pull/72529