PR libstdc++/81221 fix namespace qualification for parallel mode

	PR libstdc++/81221
	* include/bits/stl_algo.h (sample): Qualify with _GLIBCXX_STD_A not
	std.
	* testsuite/25_algorithms/sample/81221.cc: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@249692 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 23 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/25_algorithms/sample/81221.cc b/libstdc++-v3/testsuite/25_algorithms/sample/81221.cc
new file mode 100644
index 00000000000..e6dd5e0acd1
--- /dev/null
+++ b/libstdc++-v3/testsuite/25_algorithms/sample/81221.cc
@@ -0,0 +1,23 @@
+// Copyright (C) 2017 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/>.
+
+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++1z } }
+
+#undef _GLIBCXX_PARALLEL
+#define _GLIBCXX_PARALLEL 1
+#include <algorithm>