libstdc++-v3/include/bits/c++config

// Predefined symbols and macros -*- C++ -*-

// Copyright (C) 1997-2013 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)
// any later version.

// This library 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/c++config.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{iosfwd}
 */

#ifndef _GLIBCXX_CXX_CONFIG_H
#define _GLIBCXX_CXX_CONFIG_H 1

// The current version of the C++ library in compressed ISO date format.
#define __GLIBCXX__

// Macros for various attributes.
//   _GLIBCXX_PURE
//   _GLIBCXX_CONST
//   _GLIBCXX_NORETURN
//   _GLIBCXX_NOTHROW
//   _GLIBCXX_VISIBILITY
#ifndef _GLIBCXX_PURE
# define _GLIBCXX_PURE __attribute__ ((__pure__))
#endif

#ifndef _GLIBCXX_CONST
# define _GLIBCXX_CONST __attribute__ ((__const__))
#endif

#ifndef _GLIBCXX_NORETURN
# define _GLIBCXX_NORETURN __attribute__ ((__noreturn__))
#endif

// See below for C++
#ifndef _GLIBCXX_NOTHROW
# ifndef __cplusplus
#  define _GLIBCXX_NOTHROW __attribute__((__nothrow__))
# endif
#endif

// Macros for visibility attributes.
//   _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
//   _GLIBCXX_VISIBILITY
#define _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY

#if _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
# define _GLIBCXX_VISIBILITY(V) __attribute__ ((__visibility__ (#V)))
#else
// If this is not supplied by the OS-specific or CPU-specific
// headers included below, it will be defined to an empty default.
# define _GLIBCXX_VISIBILITY(V) _GLIBCXX_PSEUDO_VISIBILITY(V)
#endif

// Macros for deprecated attributes.
//   _GLIBCXX_USE_DEPRECATED
//   _GLIBCXX_DEPRECATED
#ifndef _GLIBCXX_USE_DEPRECATED
# define _GLIBCXX_USE_DEPRECATED 1
#endif

#if defined(__DEPRECATED) && (__cplusplus >= 201103L)
# define _GLIBCXX_DEPRECATED __attribute__ ((__deprecated__))
#else
# define _GLIBCXX_DEPRECATED
#endif

#if __cplusplus

// Macro for constexpr, to support in mixed 03/0x mode.
#ifndef _GLIBCXX_CONSTEXPR
# if __cplusplus >= 201103L
#  define _GLIBCXX_CONSTEXPR constexpr
#  define _GLIBCXX_USE_CONSTEXPR constexpr
# else
#  define _GLIBCXX_CONSTEXPR
#  define _GLIBCXX_USE_CONSTEXPR const
# endif
#endif

// Macro for noexcept, to support in mixed 03/0x mode.
#ifndef _GLIBCXX_NOEXCEPT
# if __cplusplus >= 201103L
#  define _GLIBCXX_NOEXCEPT noexcept
#  define _GLIBCXX_USE_NOEXCEPT noexcept
#  define _GLIBCXX_THROW(_EXC)
# else
#  define _GLIBCXX_NOEXCEPT
#  define _GLIBCXX_USE_NOEXCEPT throw()
#  define _GLIBCXX_THROW(_EXC) throw(_EXC)
# endif
#endif

#ifndef _GLIBCXX_NOTHROW
# define _GLIBCXX_NOTHROW _GLIBCXX_USE_NOEXCEPT
#endif

#ifndef _GLIBCXX_THROW_OR_ABORT
# if __EXCEPTIONS
#  define _GLIBCXX_THROW_OR_ABORT(_EXC) (throw (_EXC))
# else
#  define _GLIBCXX_THROW_OR_ABORT(_EXC) (__builtin_abort())
# endif
#endif

// Macro for extern template, ie controling template linkage via use
// of extern keyword on template declaration. As documented in the g++
// manual, it inhibits all implicit instantiations and is used
// throughout the library to avoid multiple weak definitions for
// required types that are already explicitly instantiated in the
// library binary. This substantially reduces the binary size of
// resulting executables.
// Special case: _GLIBCXX_EXTERN_TEMPLATE == -1 disallows extern
// templates only in basic_string, thus activating its debug-mode
// checks even at -O0.
#define _GLIBCXX_EXTERN_TEMPLATE

/*
  Outline of libstdc++ namespaces.

  namespace std
  {
    namespace __debug { }
    namespace __parallel { }
    namespace __profile { }
    namespace __cxx1998 { }

    namespace __detail { }

    namespace rel_ops { }

    namespace tr1
    {
      namespace placeholders { }
      namespace regex_constants { }
      namespace __detail { }
    }

    namespace tr2 { }
    
    namespace decimal { }

    namespace chrono { }
    namespace placeholders { }
    namespace regex_constants { }
    namespace this_thread { }
  }

  namespace abi { }

  namespace __gnu_cxx
  {
    namespace __detail { }
  }

  For full details see:
  http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/namespaces.html
*/
namespace std
{
  typedef __SIZE_TYPE__ 	size_t;
  typedef __PTRDIFF_TYPE__	ptrdiff_t;

#if __cplusplus >= 201103L
  typedef decltype(nullptr)	nullptr_t;
#endif
}


// Defined if inline namespaces are used for versioning.
#define _GLIBCXX_INLINE_VERSION 

// Inline namespace for symbol versioning.
#if _GLIBCXX_INLINE_VERSION

namespace std
{
  inline namespace __7 { }

  namespace rel_ops { inline namespace __7 { } }

  namespace tr1
  {
    inline namespace __7 { }
    namespace placeholders { inline namespace __7 { } }
    namespace regex_constants { inline namespace __7 { } }
    namespace __detail { inline namespace __7 { } }
  }

  namespace tr2
  { inline namespace __7 { } }

  namespace decimal { inline namespace __7 { } }

  namespace chrono { inline namespace __7 { } }
  namespace placeholders { inline namespace __7 { } }
  namespace regex_constants { inline namespace __7 { } }
  namespace this_thread { inline namespace __7 { } }

  namespace __detail { inline namespace __7 { } }
}

namespace __gnu_cxx
{
  inline namespace __7 { }
  namespace __detail { inline namespace __7 { } }
}
# define _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace __7 {
# define _GLIBCXX_END_NAMESPACE_VERSION }
#else
# define _GLIBCXX_BEGIN_NAMESPACE_VERSION
# define _GLIBCXX_END_NAMESPACE_VERSION
#endif


// Inline namespaces for special modes: debug, parallel, profile.
#if defined(_GLIBCXX_DEBUG) || defined(_GLIBCXX_PARALLEL) \
    || defined(_GLIBCXX_PROFILE)
namespace std
{
  // Non-inline namespace for components replaced by alternates in active mode.
  namespace __cxx1998
  {
#if _GLIBCXX_INLINE_VERSION
 inline namespace __7 { }
#endif
  }

  // Inline namespace for debug mode.
# ifdef _GLIBCXX_DEBUG
  inline namespace __debug { }
# endif

  // Inline namespaces for parallel mode.
# ifdef _GLIBCXX_PARALLEL
  inline namespace __parallel { }
# endif

  // Inline namespaces for profile mode
# ifdef _GLIBCXX_PROFILE
  inline namespace __profile { }
# endif
}

// Check for invalid usage and unsupported mixed-mode use.
# if defined(_GLIBCXX_DEBUG) && defined(_GLIBCXX_PARALLEL)
#  error illegal use of multiple inlined namespaces
# endif
# if defined(_GLIBCXX_PROFILE) && defined(_GLIBCXX_DEBUG)
#  error illegal use of multiple inlined namespaces
# endif
# if defined(_GLIBCXX_PROFILE) && defined(_GLIBCXX_PARALLEL)
#  error illegal use of multiple inlined namespaces
# endif

// Check for invalid use due to lack for weak symbols.
# if __NO_INLINE__ && !__GXX_WEAK__
#  warning currently using inlined namespace mode which may fail \
   without inlining due to lack of weak symbols
# endif
#endif

// Macros for namespace scope. Either namespace std:: or the name
// of some nested namespace within it corresponding to the active mode.
// _GLIBCXX_STD_A
// _GLIBCXX_STD_C
//
// Macros for opening/closing conditional namespaces.
// _GLIBCXX_BEGIN_NAMESPACE_ALGO
// _GLIBCXX_END_NAMESPACE_ALGO
// _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
// _GLIBCXX_END_NAMESPACE_CONTAINER
#if defined(_GLIBCXX_DEBUG) || defined(_GLIBCXX_PROFILE)
# define _GLIBCXX_STD_C __cxx1998
# define _GLIBCXX_BEGIN_NAMESPACE_CONTAINER \
	 namespace _GLIBCXX_STD_C { _GLIBCXX_BEGIN_NAMESPACE_VERSION
# define _GLIBCXX_END_NAMESPACE_CONTAINER \
	 _GLIBCXX_END_NAMESPACE_VERSION }
# undef _GLIBCXX_EXTERN_TEMPLATE
# define _GLIBCXX_EXTERN_TEMPLATE -1
#endif

#ifdef _GLIBCXX_PARALLEL
# define _GLIBCXX_STD_A __cxx1998
# define _GLIBCXX_BEGIN_NAMESPACE_ALGO \
	 namespace _GLIBCXX_STD_A { _GLIBCXX_BEGIN_NAMESPACE_VERSION
# define _GLIBCXX_END_NAMESPACE_ALGO \
	 _GLIBCXX_END_NAMESPACE_VERSION }
#endif

#ifndef _GLIBCXX_STD_A
# define _GLIBCXX_STD_A std
#endif

#ifndef _GLIBCXX_STD_C
# define _GLIBCXX_STD_C std
#endif

#ifndef _GLIBCXX_BEGIN_NAMESPACE_ALGO
# define _GLIBCXX_BEGIN_NAMESPACE_ALGO
#endif

#ifndef _GLIBCXX_END_NAMESPACE_ALGO
# define _GLIBCXX_END_NAMESPACE_ALGO
#endif

#ifndef _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
# define _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
#endif

#ifndef _GLIBCXX_END_NAMESPACE_CONTAINER
# define _GLIBCXX_END_NAMESPACE_CONTAINER
#endif

// GLIBCXX_ABI Deprecated
// Define if compatibility should be provided for -mlong-double-64.
#undef _GLIBCXX_LONG_DOUBLE_COMPAT

// Inline namespace for long double 128 mode.
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
namespace std
{
  inline namespace __gnu_cxx_ldbl128 { }
}
# define _GLIBCXX_NAMESPACE_LDBL __gnu_cxx_ldbl128::
# define _GLIBCXX_BEGIN_NAMESPACE_LDBL namespace __gnu_cxx_ldbl128 {
# define _GLIBCXX_END_NAMESPACE_LDBL }
#else
# define _GLIBCXX_NAMESPACE_LDBL
# define _GLIBCXX_BEGIN_NAMESPACE_LDBL
# define _GLIBCXX_END_NAMESPACE_LDBL
#endif

// Assert.
#if !defined(_GLIBCXX_DEBUG) && !defined(_GLIBCXX_PARALLEL)
# define __glibcxx_assert(_Condition)
#else
namespace std
{
  // Avoid the use of assert, because we're trying to keep the <cassert>
  // include out of the mix.
  inline void
  __replacement_assert(const char* __file, int __line,
		       const char* __function, const char* __condition)
  {
    __builtin_printf("%s:%d: %s: Assertion '%s' failed.\n", __file, __line,
		     __function, __condition);
    __builtin_abort();
  }
}
#define __glibcxx_assert(_Condition)				   	 \
  do 									 \
  {							      		 \
    if (! (_Condition))                                                  \
      std::__replacement_assert(__FILE__, __LINE__, __PRETTY_FUNCTION__, \
				#_Condition);				 \
  } while (false)
#endif

// Macros for race detectors.
// _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(A) and
// _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(A) should be used to explain
// atomic (lock-free) synchronization to race detectors:
// the race detector will infer a happens-before arc from the former to the
// latter when they share the same argument pointer.
//
// The most frequent use case for these macros (and the only case in the
// current implementation of the library) is atomic reference counting:
//   void _M_remove_reference()
//   {
//     _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&this->_M_refcount);
//     if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount, -1) <= 0)
//       {
//         _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&this->_M_refcount);
//         _M_destroy(__a);
//       }
//   }
// The annotations in this example tell the race detector that all memory
// accesses occurred when the refcount was positive do not race with
// memory accesses which occurred after the refcount became zero.
#ifndef _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE
# define  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(A)
#endif
#ifndef _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER
# define  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(A)
#endif

// Macros for C linkage: define extern "C" linkage only when using C++.
# define _GLIBCXX_BEGIN_EXTERN_C extern "C" {
# define _GLIBCXX_END_EXTERN_C }

#else // !__cplusplus
# define _GLIBCXX_BEGIN_EXTERN_C
# define _GLIBCXX_END_EXTERN_C
#endif


// First includes.

// Pick up any OS-specific definitions.
#include <bits/os_defines.h>

// Pick up any CPU-specific definitions.
#include <bits/cpu_defines.h>

// If platform uses neither visibility nor psuedo-visibility,
// specify empty default for namespace annotation macros.
#ifndef _GLIBCXX_PSEUDO_VISIBILITY
# define _GLIBCXX_PSEUDO_VISIBILITY(V)
#endif

// Certain function definitions that are meant to be overridable from
// user code are decorated with this macro.  For some targets, this
// macro causes these definitions to be weak.
#ifndef _GLIBCXX_WEAK_DEFINITION
# define _GLIBCXX_WEAK_DEFINITION
#endif


// The remainder of the prewritten config is automatic; all the
// user hooks are listed above.

// Create a boolean flag to be used to determine if --fast-math is set.
#ifdef __FAST_MATH__
# define _GLIBCXX_FAST_MATH 1
#else
# define _GLIBCXX_FAST_MATH 0
#endif

// This marks string literals in header files to be extracted for eventual
// translation.  It is primarily used for messages in thrown exceptions; see
// src/functexcept.cc.  We use __N because the more traditional _N is used
// for something else under certain OSes (see BADNAMES).
#define __N(msgid)     (msgid)

// For example, <windows.h> is known to #define min and max as macros...
#undef min
#undef max

// End of prewritten config; the settings discovered at configure time follow.