gcc/libstdc++-v3/testsuite/17_intro/header_cerrno.cc

// 2001-02-06  Benjamin Kosnik  <bkoz@redhat.com>

// Copyright (C) 2001, 2003 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.

// 17.4.1.2 Headers, cerrno

#include <cerrno>

namespace gnu
{
  int test01()
  { 
    int i = errno;
#ifndef errno
    #error "errno_must_be_a_macro"
#endif
    return i;
  }
}
  
int main()
{
  gnu::test01();
  return 0;
}