1 files changed, 21 insertions, 0 deletions

diff --git a/libcxx/test/thread/macro.pass.cpp b/libcxx/test/thread/macro.pass.cpp
new file mode 100644
index 00000000000..baa2e5c05f9
--- /dev/null
+++ b/libcxx/test/thread/macro.pass.cpp
@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+// ΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <thread>
+
+// #define __STDCPP_THREADS __cplusplus
+
+#include <thread>
+
+int main()
+{
+#ifndef __STDCPP_THREADS
+#error __STDCPP_THREADS is not defined
+#endif
+}