gcc/libstdc++-v3/include/c/cwchar

// -*- C++ -*- forwarding header.

// Copyright (C) 2000-2020 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

//
// ISO C++ 14882: 21.4
//

#ifndef _GLIBCXX_CWCHAR
#define _GLIBCXX_CWCHAR 1

#pragma GCC system_header

#include <bits/c++config.h>
#include <cstddef>
#include <ctime>

#if _GLIBCXX_HAVE_WCHAR_H
#include_next <wchar.h>
#endif

// Need to do a bit of trickery here with mbstate_t as char_traits
// assumes it is in wchar.h, regardless of wchar_t specializations.
#ifndef _GLIBCXX_HAVE_MBSTATE_T
namespace std _GLIBCXX_VISIBILITY(default)
{
  extern "C"
  {
    typedef struct
    {
      int __fill[6];
    } mbstate_t;
  }
}
#endif

#endif