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diff --git a/libstdc++-v3/testsuite/29_atomics/headers/stdatomic.h/functions.c b/libstdc++-v3/testsuite/29_atomics/headers/stdatomic.h/functions.c
new file mode 100644
index 00000000..9c9fe7d1
--- /dev/null
+++ b/libstdc++-v3/testsuite/29_atomics/headers/stdatomic.h/functions.c
@@ -0,0 +1,36 @@
+// { dg-options "-x c" }
+// { dg-do compile }
+
+// Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <stdatomic.h>
+
+int main()
+{
+  volatile atomic_flag f;
+  volatile atomic_flag* p = &f;
+  memory_order m = memory_order_relaxed;
+
+  // For position only.
+  atomic_flag_test_and_set(p);
+  atomic_flag_test_and_set_explicit(p, m);
+  atomic_flag_clear(p);
+  atomic_flag_clear_explicit(p, m);
+
+  return 0;
+}