--- /dev/null
+// { dg-do compile }
+
+// Copyright (C) 2007 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 2, 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 COPYING. If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+#include <clocale>
+
+namespace gnu
+{
+#ifndef NULL
+ #error "NULL_must_be_a_macro"
+#endif
+
+#ifndef LC_ALL
+ #error "LC_ALL_must_be_a_macro"
+#endif
+
+#ifndef LC_COLLATE
+ #error "LC_COLLATE_must_be_a_macro"
+#endif
+
+#ifndef LC_CTYPE
+ #error "LC_CTYPE_must_be_a_macro"
+#endif
+
+#ifndef LC_MONETARY
+ #error "LC_MONETARY_must_be_a_macro"
+#endif
+
+#ifndef LC_NUMERIC
+ #error "LC_NUMERIC_must_be_a_macro"
+#endif
+
+#ifndef LC_TIME
+ #error "LC_TIME_must_be_a_macro"
+#endif
+}