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111
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1 /* C++ specific Solaris system support.
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131
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2 Copyright (C) 2011-2018 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "cp/cp-tree.h"
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24 #include "stringpool.h"
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25
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26 /* Before GCC 4.7, g++ defined __cplusplus 1 to avoid coping with the C++98
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27 overloads in Solaris system headers. Since this was fixed, 4 structure
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28 types would move to namespace std, breaking the Solaris libstdc++ ABI.
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29 To avoid this, we forcefully keep those types in the global namespace.
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30 This can be removed once the next major version of libstdc++ is
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31 released. */
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32
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33 /* Cache the identifiers of the affected types to speed up lookup. */
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34 #define NUM_FGID 4
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35 static GTY(()) tree force_global_identifiers[NUM_FGID];
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36
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37 /* Check if DECL is one of the affected types and move it to the global
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38 namespace if so. */
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39 tree
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40 solaris_cxx_decl_mangling_context (const_tree decl)
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41 {
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42 static bool init = false;
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43 int i = 0;
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44
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45 if (!init)
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46 {
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47 force_global_identifiers[i++] = get_identifier ("div_t");
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48 force_global_identifiers[i++] = get_identifier ("ldiv_t");
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49 force_global_identifiers[i++] = get_identifier ("lconv");
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50 force_global_identifiers[i++] = get_identifier ("tm");
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51 init = true;
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52 }
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53
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54 if (!(DECL_P (decl) && DECL_NAMESPACE_STD_P (CP_DECL_CONTEXT (decl))))
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55 return NULL_TREE;
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56
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57 for (i = 0; i < NUM_FGID; i++)
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58 if (DECL_NAME (decl) == force_global_identifiers[i])
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59 return global_namespace;
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60
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61 return NULL_TREE;
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62 }
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