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/* C++ specific Solaris system support.

   Copyright (C) 2011 Free Software Foundation, Inc.

This file is part of GCC.

GCC 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.

GCC 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 GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "tree.h"

#include "cp/cp-tree.h"

#include "tm.h"

#include "tm_p.h"

/* Before GCC 4.7, g++ defined __cplusplus 1 to avoid coping with the C++98

   overloads in Solaris system headers.  Since this was fixed, 4 structure

   types would move to namespace std, breaking the Solaris libstdc++ ABI.

   To avoid this, we forcefully keep those types in the global namespace.

   This can be removed once the next major version of libstdc++ is

   released.  */

/* Cache the identifiers of the affected types to speed up lookup.  */

#define NUM_FGID 4

static GTY(()) tree force_global_identifiers[NUM_FGID];

/* Check if DECL is one of the affected types and move it to the global

   namespace if so.  */

tree

solaris_cxx_decl_mangling_context (const_tree decl)

{

  static bool init = false;

  int i = 0;

  if (!init)

    {

      force_global_identifiers[i++] = get_identifier ("div_t");

      force_global_identifiers[i++] = get_identifier ("ldiv_t");

      force_global_identifiers[i++] = get_identifier ("lconv");

      force_global_identifiers[i++] = get_identifier ("tm");

      init = true;

    }

  if (!(DECL_P (decl) && DECL_NAMESPACE_STD_P (CP_DECL_CONTEXT (decl))))

    return NULL_TREE;

  for (i = 0; i < NUM_FGID; i++)

    if (DECL_NAME (decl) == force_global_identifiers[i])

        return global_namespace;

  return NULL_TREE;

}