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// system.h -- general definitions for gold -*- C++ -*-
// Copyright (C) 2006-2016 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
#ifndef SYSTEM_H
#define SYSTEM_H 1
#ifndef ENABLE_NLS
// The Solaris version of locale.h always includes libintl.h. If we
// have been configured with --disable-nls then ENABLE_NLS will not
// be defined and the dummy definitions of bindtextdomain (et al)
// below will conflict with the definitions in libintl.h. So we
// define these values to prevent the bogus inclusion of libintl.h.
# define _LIBINTL_H
# define _LIBGETTEXT_H
#endif
#ifdef ENABLE_NLS
// On some systems, things go awry when <libintl.h> comes after <clocale>.
# include <libintl.h>
# include <clocale>
# define _(String) gettext (String)
# ifdef gettext_noop
# define N_(String) gettext_noop (String)
# else
# define N_(String) (String)
# endif
#else
// Include <clocale> first to avoid conflicts with these macros.
# include <clocale>
# define gettext(Msgid) (Msgid)
# define dgettext(Domainname, Msgid) (Msgid)
# define dcgettext(Domainname, Msgid, Category) (Msgid)
# define textdomain(Domainname) do {} while (0) /* nothing */
# define bindtextdomain(Domainname, Dirname) do {} while (0) /* nothing */
# define _(String) (String)
# define N_(String) (String)
#endif
// Figure out how to get a hash set and a hash map.
#if defined(HAVE_UNORDERED_SET) && defined(HAVE_UNORDERED_MAP)
#include <unordered_set>
#include <unordered_map>
// We need a template typedef here.
#define Unordered_set std::unordered_set
#define Unordered_map std::unordered_map
#define Unordered_multimap std::unordered_multimap
#define reserve_unordered_map(map, n) ((map)->rehash(n))
#elif defined(HAVE_TR1_UNORDERED_SET) && defined(HAVE_TR1_UNORDERED_MAP) \
&& defined(HAVE_TR1_UNORDERED_MAP_REHASH)
#include <tr1/unordered_set>
#include <tr1/unordered_map>
// We need a template typedef here.
#define Unordered_set std::tr1::unordered_set
#define Unordered_map std::tr1::unordered_map
#define Unordered_multimap std::tr1::unordered_multimap
#define reserve_unordered_map(map, n) ((map)->rehash(n))
#ifndef HAVE_TR1_HASH_OFF_T
// The library does not support hashes of off_t values. Add support
// here. This is likely to be specific to libstdc++. This issue
// arises with GCC 4.1.x when compiling in 32-bit mode with a 64-bit
// off_t type.
namespace std { namespace tr1 {
template<>
struct hash<off_t> : public std::unary_function<off_t, std::size_t>
{
std::size_t
operator()(off_t val) const
{ return static_cast<std::size_t>(val); }
};
} } // Close namespaces.
#endif // !defined(HAVE_TR1_HASH_OFF_T)
#elif defined(HAVE_EXT_HASH_MAP) && defined(HAVE_EXT_HASH_SET)
#include <ext/hash_map>
#include <ext/hash_set>
#include <string>
#define Unordered_set __gnu_cxx::hash_set
#define Unordered_map __gnu_cxx::hash_map
#define Unordered_multimap __gnu_cxx::hash_multimap
namespace __gnu_cxx
{
template<>
struct hash<std::string>
{
size_t
operator()(std::string s) const
{ return __stl_hash_string(s.c_str()); }
};
template<typename T>
struct hash<T*>
{
size_t
operator()(T* p) const
{ return reinterpret_cast<size_t>(p); }
};
}
#define reserve_unordered_map(map, n) ((map)->resize(n))
#else
// The fallback is to just use set and map.
#include <set>
#include <map>
#define Unordered_set std::set
#define Unordered_map std::map
#define Unordered_multimap std::multimap
#define reserve_unordered_map(map, n)
#endif
#ifndef HAVE_PREAD
extern "C" ssize_t pread(int, void*, size_t, off_t);
#endif
#ifndef HAVE_FTRUNCATE
extern "C" int ftruncate(int, off_t);
#endif
#ifndef HAVE_FFSLL
extern "C" int ffsll(long long);
#endif
#if !HAVE_DECL_MEMMEM
extern "C" void *memmem(const void *, size_t, const void *, size_t);
#endif
#if !HAVE_DECL_STRNDUP
extern "C" char *strndup(const char *, size_t);
#endif
#endif // !defined(SYSTEM_H)
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