[libcxx-commits] [libcxx] [libc++] Floating Point Atomic (PR #67799)

[Louis Dionne via libcxx-commits]

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@@ -0,0 +1,61 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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ldionne wrote:

Mark the following tests as failing on mingw:

```
libcxx/test/libcxx/atomics/atomics.types.generic/atomics.types.float/lockfree.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/assign.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/ctor.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/exchange.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/fetch_add.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/fetch_sub.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/load.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/lockfree.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/operator.float.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/operator.minus_equals.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/operator.plus_equals.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/store.pass.cpp
libcxx/test/std/atomics/atomics.types.generic/atomics.types.float/wait.pass.cpp
```

You can use

```
// TODO: Figure out why this test fails on MinGW
// UNSUPPORTED: target={{.+}}-windows-gnu
```

CC @mstorsjo -- we need to link against something that provides `__atomic_load` & friends and it looks like MinGW doesn't provide `-latomic` -- do you know what might be wrong? I won't block this patch any more on this, but it would be nice to resolve.


https://github.com/llvm/llvm-project/pull/67799