| 1 | // system.h -- general definitions for gold -*- C++ -*- |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or modify |
| 9 | // it under the terms of the GNU General Public License as published by |
| 10 | // the Free Software Foundation; either version 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #ifndef SYSTEM_H |
| 24 | #define SYSTEM_H 1 |
| 25 | |
| 26 | #ifndef ENABLE_NLS |
| 27 | // The Solaris version of locale.h always includes libintl.h. If we |
| 28 | // have been configured with --disable-nls then ENABLE_NLS will not |
| 29 | // be defined and the dummy definitions of bindtextdomain (et al) |
| 30 | // below will conflict with the definitions in libintl.h. So we |
| 31 | // define these values to prevent the bogus inclusion of libintl.h. |
| 32 | # define _LIBINTL_H |
| 33 | # define _LIBGETTEXT_H |
| 34 | #endif |
| 35 | |
| 36 | #ifdef ENABLE_NLS |
| 37 | // On some systems, things go awry when <libintl.h> comes after <clocale>. |
| 38 | # include <libintl.h> |
| 39 | # include <clocale> |
| 40 | # define _(String) gettext (String) |
| 41 | # ifdef gettext_noop |
| 42 | # define N_(String) gettext_noop (String) |
| 43 | # else |
| 44 | # define N_(String) (String) |
| 45 | # endif |
| 46 | #else |
| 47 | // Include <clocale> first to avoid conflicts with these macros. |
| 48 | # include <clocale> |
| 49 | # define gettext(Msgid) (Msgid) |
| 50 | # define dgettext(Domainname, Msgid) (Msgid) |
| 51 | # define dcgettext(Domainname, Msgid, Category) (Msgid) |
| 52 | # define textdomain(Domainname) do {} while (0) /* nothing */ |
| 53 | # define bindtextdomain(Domainname, Dirname) do {} while (0) /* nothing */ |
| 54 | # define _(String) (String) |
| 55 | # define N_(String) (String) |
| 56 | #endif |
| 57 | |
| 58 | // Figure out how to get a hash set and a hash map. |
| 59 | |
| 60 | #if defined(HAVE_UNORDERED_SET) && defined(HAVE_UNORDERED_MAP) |
| 61 | |
| 62 | #include <unordered_set> |
| 63 | #include <unordered_map> |
| 64 | |
| 65 | // We need a template typedef here. |
| 66 | |
| 67 | #define Unordered_set std::unordered_set |
| 68 | #define Unordered_map std::unordered_map |
| 69 | #define Unordered_multimap std::unordered_multimap |
| 70 | |
| 71 | #define reserve_unordered_map(map, n) ((map)->rehash(n)) |
| 72 | |
| 73 | #elif defined(HAVE_TR1_UNORDERED_SET) && defined(HAVE_TR1_UNORDERED_MAP) \ |
| 74 | && defined(HAVE_TR1_UNORDERED_MAP_REHASH) |
| 75 | |
| 76 | #include <tr1/unordered_set> |
| 77 | #include <tr1/unordered_map> |
| 78 | |
| 79 | // We need a template typedef here. |
| 80 | |
| 81 | #define Unordered_set std::tr1::unordered_set |
| 82 | #define Unordered_map std::tr1::unordered_map |
| 83 | #define Unordered_multimap std::tr1::unordered_multimap |
| 84 | |
| 85 | #define reserve_unordered_map(map, n) ((map)->rehash(n)) |
| 86 | |
| 87 | #ifndef HAVE_TR1_HASH_OFF_T |
| 88 | // The library does not support hashes of off_t values. Add support |
| 89 | // here. This is likely to be specific to libstdc++. This issue |
| 90 | // arises with GCC 4.1.x when compiling in 32-bit mode with a 64-bit |
| 91 | // off_t type. |
| 92 | namespace std { namespace tr1 { |
| 93 | template<> |
| 94 | struct hash<off_t> : public std::unary_function<off_t, std::size_t> |
| 95 | { |
| 96 | std::size_t |
| 97 | operator()(off_t val) const |
| 98 | { return static_cast<std::size_t>(val); } |
| 99 | }; |
| 100 | } } // Close namespaces. |
| 101 | #endif // !defined(HAVE_TR1_HASH_OFF_T) |
| 102 | |
| 103 | #elif defined(HAVE_EXT_HASH_MAP) && defined(HAVE_EXT_HASH_SET) |
| 104 | |
| 105 | #include <ext/hash_map> |
| 106 | #include <ext/hash_set> |
| 107 | #include <string> |
| 108 | |
| 109 | #define Unordered_set __gnu_cxx::hash_set |
| 110 | #define Unordered_map __gnu_cxx::hash_map |
| 111 | #define Unordered_multimap __gnu_cxx::hash_multimap |
| 112 | |
| 113 | namespace __gnu_cxx |
| 114 | { |
| 115 | |
| 116 | template<> |
| 117 | struct hash<std::string> |
| 118 | { |
| 119 | size_t |
| 120 | operator()(std::string s) const |
| 121 | { return __stl_hash_string(s.c_str()); } |
| 122 | }; |
| 123 | |
| 124 | template<typename T> |
| 125 | struct hash<T*> |
| 126 | { |
| 127 | size_t |
| 128 | operator()(T* p) const |
| 129 | { return reinterpret_cast<size_t>(p); } |
| 130 | }; |
| 131 | |
| 132 | } |
| 133 | |
| 134 | #define reserve_unordered_map(map, n) ((map)->resize(n)) |
| 135 | |
| 136 | #else |
| 137 | |
| 138 | // The fallback is to just use set and map. |
| 139 | |
| 140 | #include <set> |
| 141 | #include <map> |
| 142 | |
| 143 | #define Unordered_set std::set |
| 144 | #define Unordered_map std::map |
| 145 | #define Unordered_multimap std::multimap |
| 146 | |
| 147 | #define reserve_unordered_map(map, n) |
| 148 | |
| 149 | #endif |
| 150 | |
| 151 | #ifndef HAVE_PREAD |
| 152 | extern "C" ssize_t pread(int, void*, size_t, off_t); |
| 153 | #endif |
| 154 | |
| 155 | #ifndef HAVE_FTRUNCATE |
| 156 | extern "C" int ftruncate(int, off_t); |
| 157 | #endif |
| 158 | |
| 159 | #ifndef HAVE_FFSLL |
| 160 | extern "C" int ffsll(long long); |
| 161 | #endif |
| 162 | |
| 163 | #if !HAVE_DECL_MEMMEM |
| 164 | extern "C" void *memmem(const void *, size_t, const void *, size_t); |
| 165 | #endif |
| 166 | |
| 167 | #if !HAVE_DECL_STRNDUP |
| 168 | extern "C" char *strndup(const char *, size_t); |
| 169 | #endif |
| 170 | |
| 171 | #endif // !defined(SYSTEM_H) |