1 // system.h -- general definitions for gold -*- C++ -*- 2 3 // Copyright (C) 2006-2016 Free Software Foundation, Inc. 4 // Written by Ian Lance Taylor <iant (at) 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) 172
