1// system.h -- general definitions for gold -*- C++ -*- 2 3// Copyright (C) 2006-2020 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 ngettext(Msgid1, Msgid2, n) \ 53 (n == 1 ? Msgid1 : Msgid2) 54# define dngettext(Domainname, Msgid1, Msgid2, n) \ 55 (n == 1 ? Msgid1 : Msgid2) 56# define dcngettext(Domainname, Msgid1, Msgid2, n, Category) \ 57 (n == 1 ? Msgid1 : Msgid2) 58# define textdomain(Domainname) do {} while (0) 59# define bindtextdomain(Domainname, Dirname) do {} while (0) 60# define _(String) (String) 61# define N_(String) (String) 62#endif 63 64// Figure out how to get a hash set and a hash map. 65 66#if defined(HAVE_UNORDERED_SET) && defined(HAVE_UNORDERED_MAP) 67 68#include <unordered_set> 69#include <unordered_map> 70 71// We need a template typedef here. 72 73#define Unordered_set std::unordered_set 74#define Unordered_map std::unordered_map 75#define Unordered_multimap std::unordered_multimap 76 77#define reserve_unordered_map(map, n) ((map)->rehash(n)) 78 79#elif defined(HAVE_TR1_UNORDERED_SET) && defined(HAVE_TR1_UNORDERED_MAP) \ 80 && defined(HAVE_TR1_UNORDERED_MAP_REHASH) 81 82#include <tr1/unordered_set> 83#include <tr1/unordered_map> 84 85// We need a template typedef here. 86 87#define Unordered_set std::tr1::unordered_set 88#define Unordered_map std::tr1::unordered_map 89#define Unordered_multimap std::tr1::unordered_multimap 90 91#define reserve_unordered_map(map, n) ((map)->rehash(n)) 92 93#ifndef HAVE_TR1_HASH_OFF_T 94// The library does not support hashes of off_t values. Add support 95// here. This is likely to be specific to libstdc++. This issue 96// arises with GCC 4.1.x when compiling in 32-bit mode with a 64-bit 97// off_t type. 98namespace std { namespace tr1 { 99template<> 100struct hash<off_t> : public std::unary_function<off_t, std::size_t> 101{ 102 std::size_t 103 operator()(off_t val) const 104 { return static_cast<std::size_t>(val); } 105}; 106} } // Close namespaces. 107#endif // !defined(HAVE_TR1_HASH_OFF_T) 108 109#elif defined(HAVE_EXT_HASH_MAP) && defined(HAVE_EXT_HASH_SET) 110 111#include <ext/hash_map> 112#include <ext/hash_set> 113#include <string> 114 115#define Unordered_set __gnu_cxx::hash_set 116#define Unordered_map __gnu_cxx::hash_map 117#define Unordered_multimap __gnu_cxx::hash_multimap 118 119namespace __gnu_cxx 120{ 121 122template<> 123struct hash<std::string> 124{ 125 size_t 126 operator()(std::string s) const 127 { return __stl_hash_string(s.c_str()); } 128}; 129 130template<typename T> 131struct hash<T*> 132{ 133 size_t 134 operator()(T* p) const 135 { return reinterpret_cast<size_t>(p); } 136}; 137 138} 139 140#define reserve_unordered_map(map, n) ((map)->resize(n)) 141 142#else 143 144// The fallback is to just use set and map. 145 146#include <set> 147#include <map> 148 149#define Unordered_set std::set 150#define Unordered_map std::map 151#define Unordered_multimap std::multimap 152 153#define reserve_unordered_map(map, n) 154 155#endif 156 157#ifndef HAVE_PREAD 158extern "C" ssize_t pread(int, void*, size_t, off_t); 159#endif 160 161#ifndef HAVE_FTRUNCATE 162extern "C" int ftruncate(int, off_t); 163#endif 164 165#ifndef HAVE_FFSLL 166extern "C" int ffsll(long long); 167#endif 168 169#if !HAVE_DECL_MEMMEM 170extern "C" void *memmem(const void *, size_t, const void *, size_t); 171#endif 172 173#if !HAVE_DECL_STRNDUP 174extern "C" char *strndup(const char *, size_t); 175#endif 176 177#endif // !defined(SYSTEM_H) 178