text: // { dg-options "-std=gnu++17" }
  // { dg-do compile { target c++17 } }
  // { dg-require-gthreads "" }
  
  // Copyright (C) 2017-2020 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/>.
  
  
  // NB: This file is for testing with NO OTHER INCLUDES.
  
  #include <mutex>
  
  namespace std
  {
    template class scoped_lock<>;
    template class scoped_lock<mutex>;
    template class scoped_lock<recursive_mutex, mutex>;
  }
  