[libcxx-commits] [libcxx] [libc++][NFC] Simplify features for detecting atomics' support. (PR #75553)

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@@ -183,25 +183,26 @@ def _getAndroidDeviceApi(cfg):
         actions=[AddLinkFlag("-latomic")],
     ),
     Feature(
-        name="non-lockfree-atomics",
+        name="has-64-bit-atomics",
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EricWF wrote:

What does it mean to have `has-64-bit-atomics`? 

I guess I still don't understand the fundamental underlying property we're trying to observe. 

https://github.com/llvm/llvm-project/pull/75553