8356f2d009
gold/ * configure.ac: Check for <unordered_set> and <unordered_map>. * config.in: Regenerate. * configure: Regenerate. * system.h: Use <unordered_set> and <unordered_map> if available.
171 lines
4.6 KiB
C++
171 lines
4.6 KiB
C++
// system.h -- general definitions for gold -*- C++ -*-
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// Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@google.com>.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#ifndef SYSTEM_H
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#define SYSTEM_H 1
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#ifndef ENABLE_NLS
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// The Solaris version of locale.h always includes libintl.h. If we
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// have been configured with --disable-nls then ENABLE_NLS will not
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// be defined and the dummy definitions of bindtextdomain (et al)
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// below will conflict with the definitions in libintl.h. So we
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// define these values to prevent the bogus inclusion of libintl.h.
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# define _LIBINTL_H
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# define _LIBGETTEXT_H
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#endif
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#ifdef ENABLE_NLS
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// On some systems, things go awry when <libintl.h> comes after <clocale>.
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# include <libintl.h>
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# include <clocale>
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# define _(String) gettext (String)
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# ifdef gettext_noop
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# define N_(String) gettext_noop (String)
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# else
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# define N_(String) (String)
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# endif
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#else
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// Include <clocale> first to avoid conflicts with these macros.
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# include <clocale>
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# define gettext(Msgid) (Msgid)
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# define dgettext(Domainname, Msgid) (Msgid)
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# define dcgettext(Domainname, Msgid, Category) (Msgid)
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# define textdomain(Domainname) do {} while (0) /* nothing */
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# define bindtextdomain(Domainname, Dirname) do {} while (0) /* nothing */
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# define _(String) (String)
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# define N_(String) (String)
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#endif
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// Figure out how to get a hash set and a hash map.
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#if defined(HAVE_UNORDERED_SET) && defined(HAVE_UNORDERED_MAP)
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#include <unordered_set>
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#include <unordered_map>
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// We need a template typedef here.
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#define Unordered_set std::unordered_set
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#define Unordered_map std::unordered_map
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#define Unordered_multimap std::unordered_multimap
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#define reserve_unordered_map(map, n) ((map)->rehash(n))
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#elif defined(HAVE_TR1_UNORDERED_SET) && defined(HAVE_TR1_UNORDERED_MAP) \
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&& defined(HAVE_TR1_UNORDERED_MAP_REHASH)
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#include <tr1/unordered_set>
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#include <tr1/unordered_map>
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// We need a template typedef here.
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#define Unordered_set std::tr1::unordered_set
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#define Unordered_map std::tr1::unordered_map
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#define Unordered_multimap std::tr1::unordered_multimap
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#define reserve_unordered_map(map, n) ((map)->rehash(n))
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#ifndef HAVE_TR1_HASH_OFF_T
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// The library does not support hashes of off_t values. Add support
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// here. This is likely to be specific to libstdc++. This issue
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// arises with GCC 4.1.x when compiling in 32-bit mode with a 64-bit
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// off_t type.
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namespace std { namespace tr1 {
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template<>
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struct hash<off_t> : public std::unary_function<off_t, std::size_t>
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{
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std::size_t
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operator()(off_t val) const
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{ return static_cast<std::size_t>(val); }
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};
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} } // Close namespaces.
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#endif // !defined(HAVE_TR1_HASH_OFF_T)
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#elif defined(HAVE_EXT_HASH_MAP) && defined(HAVE_EXT_HASH_SET)
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#include <ext/hash_map>
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#include <ext/hash_set>
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#include <string>
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#define Unordered_set __gnu_cxx::hash_set
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#define Unordered_map __gnu_cxx::hash_map
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#define Unordered_multimap __gnu_cxx::hash_multimap
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namespace __gnu_cxx
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{
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template<>
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struct hash<std::string>
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{
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size_t
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operator()(std::string s) const
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{ return __stl_hash_string(s.c_str()); }
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};
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template<typename T>
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struct hash<T*>
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{
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size_t
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operator()(T* p) const
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{ return reinterpret_cast<size_t>(p); }
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};
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}
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#define reserve_unordered_map(map, n) ((map)->resize(n))
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#else
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// The fallback is to just use set and map.
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#include <set>
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#include <map>
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#define Unordered_set std::set
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#define Unordered_map std::map
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#define Unordered_multimap std::multimap
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#define reserve_unordered_map(map, n)
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#endif
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#ifndef HAVE_PREAD
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extern "C" ssize_t pread(int, void*, size_t, off_t);
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#endif
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#ifndef HAVE_FTRUNCATE
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extern "C" int ftruncate(int, off_t);
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#endif
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#ifndef HAVE_FFSLL
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extern "C" int ffsll(long long);
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#endif
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#if !HAVE_DECL_MEMMEM
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extern "C" void *memmem(const void *, size_t, const void *, size_t);
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#endif
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#if !HAVE_DECL_STRNDUP
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extern "C" char *strndup(const char *, size_t);
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#endif
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#endif // !defined(SYSTEM_H)
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