[libcxx-commits] [libcxx] [libc++] Use glibc random APIs for std::random_device on Linux (PR #222567)

[Nikolas Klauser via libcxx-commits]

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@@ -0,0 +1,28 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: no-random-device
+
+// Ensure layout of std::random_device is compatible.
+
+#include <random>
+
+#include "test_macros.h"
+
+#if defined(_LIBCPP_USING_DEV_RANDOM) ||                                                                               \
+    (!defined(_LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT) && (defined(__APPLE__) || defined(__GLIBC__)))
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philnik777 wrote:

This should use a lit feature instead. Please check e.g. `libcpp-has-abi-bounded-unique_ptr` for how to do that.

https://github.com/llvm/llvm-project/pull/222567