mirror of git://gcc.gnu.org/git/gcc.git
593 lines
17 KiB
C++
593 lines
17 KiB
C++
// Predefined symbols and macros -*- C++ -*-
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// Copyright (C) 1997-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library 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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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/c++config.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{iosfwd}
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*/
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#ifndef _GLIBCXX_CXX_CONFIG_H
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#define _GLIBCXX_CXX_CONFIG_H 1
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// The current version of the C++ library in compressed ISO date format.
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#define __GLIBCXX__
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// Macros for various attributes.
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// _GLIBCXX_PURE
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// _GLIBCXX_CONST
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// _GLIBCXX_NORETURN
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// _GLIBCXX_NOTHROW
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// _GLIBCXX_VISIBILITY
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#ifndef _GLIBCXX_PURE
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# define _GLIBCXX_PURE __attribute__ ((__pure__))
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#endif
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#ifndef _GLIBCXX_CONST
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# define _GLIBCXX_CONST __attribute__ ((__const__))
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#endif
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#ifndef _GLIBCXX_NORETURN
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# define _GLIBCXX_NORETURN __attribute__ ((__noreturn__))
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#endif
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// See below for C++
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#ifndef _GLIBCXX_NOTHROW
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# ifndef __cplusplus
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# define _GLIBCXX_NOTHROW __attribute__((__nothrow__))
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# endif
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#endif
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// Macros for visibility attributes.
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// _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
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// _GLIBCXX_VISIBILITY
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#define _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
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#if _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
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# define _GLIBCXX_VISIBILITY(V) __attribute__ ((__visibility__ (#V)))
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#else
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// If this is not supplied by the OS-specific or CPU-specific
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// headers included below, it will be defined to an empty default.
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# define _GLIBCXX_VISIBILITY(V) _GLIBCXX_PSEUDO_VISIBILITY(V)
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#endif
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// Macros for deprecated attributes.
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// _GLIBCXX_USE_DEPRECATED
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// _GLIBCXX_DEPRECATED
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#ifndef _GLIBCXX_USE_DEPRECATED
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# define _GLIBCXX_USE_DEPRECATED 1
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#endif
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#if defined(__DEPRECATED) && (__cplusplus >= 201103L)
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# define _GLIBCXX_DEPRECATED __attribute__ ((__deprecated__))
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#else
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# define _GLIBCXX_DEPRECATED
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#endif
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// Macros for ABI tag attributes.
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#ifndef _GLIBCXX_ABI_TAG_CXX11
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# define _GLIBCXX_ABI_TAG_CXX11 __attribute ((__abi_tag__ ("cxx11")))
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#endif
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#if __cplusplus
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// Macro for constexpr, to support in mixed 03/0x mode.
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#ifndef _GLIBCXX_CONSTEXPR
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# if __cplusplus >= 201103L
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# define _GLIBCXX_CONSTEXPR constexpr
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# define _GLIBCXX_USE_CONSTEXPR constexpr
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# else
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# define _GLIBCXX_CONSTEXPR
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# define _GLIBCXX_USE_CONSTEXPR const
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# endif
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#endif
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#ifndef _GLIBCXX14_CONSTEXPR
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# if __cplusplus >= 201402L
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# define _GLIBCXX14_CONSTEXPR constexpr
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# else
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# define _GLIBCXX14_CONSTEXPR
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# endif
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#endif
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// Macro for noexcept, to support in mixed 03/0x mode.
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#ifndef _GLIBCXX_NOEXCEPT
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# if __cplusplus >= 201103L
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# define _GLIBCXX_NOEXCEPT noexcept
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# define _GLIBCXX_NOEXCEPT_IF(_COND) noexcept(_COND)
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# define _GLIBCXX_USE_NOEXCEPT noexcept
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# define _GLIBCXX_THROW(_EXC)
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# else
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# define _GLIBCXX_NOEXCEPT
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# define _GLIBCXX_NOEXCEPT_IF(_COND)
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# define _GLIBCXX_USE_NOEXCEPT throw()
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# define _GLIBCXX_THROW(_EXC) throw(_EXC)
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# endif
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#endif
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#ifndef _GLIBCXX_NOTHROW
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# define _GLIBCXX_NOTHROW _GLIBCXX_USE_NOEXCEPT
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#endif
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#ifndef _GLIBCXX_THROW_OR_ABORT
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# if __cpp_exceptions
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# define _GLIBCXX_THROW_OR_ABORT(_EXC) (throw (_EXC))
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# else
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# define _GLIBCXX_THROW_OR_ABORT(_EXC) (__builtin_abort())
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# endif
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#endif
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// Macro for extern template, ie controlling template linkage via use
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// of extern keyword on template declaration. As documented in the g++
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// manual, it inhibits all implicit instantiations and is used
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// throughout the library to avoid multiple weak definitions for
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// required types that are already explicitly instantiated in the
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// library binary. This substantially reduces the binary size of
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// resulting executables.
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// Special case: _GLIBCXX_EXTERN_TEMPLATE == -1 disallows extern
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// templates only in basic_string, thus activating its debug-mode
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// checks even at -O0.
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#define _GLIBCXX_EXTERN_TEMPLATE
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/*
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Outline of libstdc++ namespaces.
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namespace std
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{
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namespace __debug { }
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namespace __parallel { }
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namespace __profile { }
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namespace __cxx1998 { }
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namespace __detail { }
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namespace rel_ops { }
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namespace tr1
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{
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namespace placeholders { }
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namespace regex_constants { }
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namespace __detail { }
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}
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namespace tr2 { }
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namespace decimal { }
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namespace chrono { }
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namespace placeholders { }
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namespace regex_constants { }
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namespace this_thread { }
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namespace experimental { }
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}
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namespace abi { }
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namespace __gnu_cxx
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{
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namespace __detail { }
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}
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For full details see:
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http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/namespaces.html
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*/
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namespace std
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{
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typedef __SIZE_TYPE__ size_t;
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typedef __PTRDIFF_TYPE__ ptrdiff_t;
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#if __cplusplus >= 201103L
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typedef decltype(nullptr) nullptr_t;
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#endif
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}
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#define _GLIBCXX_USE_DUAL_ABI
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#if ! _GLIBCXX_USE_DUAL_ABI
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// Ignore any pre-defined value of _GLIBCXX_USE_CXX11_ABI
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# undef _GLIBCXX_USE_CXX11_ABI
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#endif
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#ifndef _GLIBCXX_USE_CXX11_ABI
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#define _GLIBCXX_USE_CXX11_ABI
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#endif
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#if _GLIBCXX_USE_CXX11_ABI
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namespace std
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{
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inline namespace __cxx11 __attribute__((__abi_tag__ ("cxx11"))) { }
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}
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namespace __gnu_cxx
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{
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inline namespace __cxx11 __attribute__((__abi_tag__ ("cxx11"))) { }
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}
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# define _GLIBCXX_NAMESPACE_CXX11 __cxx11::
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# define _GLIBCXX_BEGIN_NAMESPACE_CXX11 namespace __cxx11 {
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# define _GLIBCXX_END_NAMESPACE_CXX11 }
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# define _GLIBCXX_DEFAULT_ABI_TAG _GLIBCXX_ABI_TAG_CXX11
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#else
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# define _GLIBCXX_NAMESPACE_CXX11
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# define _GLIBCXX_BEGIN_NAMESPACE_CXX11
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# define _GLIBCXX_END_NAMESPACE_CXX11
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# define _GLIBCXX_DEFAULT_ABI_TAG
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#endif
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// Defined if inline namespaces are used for versioning.
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#define _GLIBCXX_INLINE_VERSION
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// Inline namespace for symbol versioning.
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#if _GLIBCXX_INLINE_VERSION
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namespace std
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{
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inline namespace __7 { }
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namespace rel_ops { inline namespace __7 { } }
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namespace tr1
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{
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inline namespace __7 { }
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namespace placeholders { inline namespace __7 { } }
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namespace regex_constants { inline namespace __7 { } }
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namespace __detail { inline namespace __7 { } }
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}
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namespace tr2
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{ inline namespace __7 { } }
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namespace decimal { inline namespace __7 { } }
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namespace chrono { inline namespace __7 { } }
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namespace placeholders { inline namespace __7 { } }
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namespace regex_constants { inline namespace __7 { } }
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namespace this_thread { inline namespace __7 { } }
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namespace experimental { inline namespace __7 { } }
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namespace __detail { inline namespace __7 { } }
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}
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namespace __gnu_cxx
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{
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inline namespace __7 { }
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namespace __detail { inline namespace __7 { } }
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}
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# define _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace __7 {
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# define _GLIBCXX_END_NAMESPACE_VERSION }
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#else
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# define _GLIBCXX_BEGIN_NAMESPACE_VERSION
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# define _GLIBCXX_END_NAMESPACE_VERSION
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#endif
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// Inline namespaces for special modes: debug, parallel, profile.
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#if defined(_GLIBCXX_DEBUG) || defined(_GLIBCXX_PARALLEL) \
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|| defined(_GLIBCXX_PROFILE)
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namespace std
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{
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// Non-inline namespace for components replaced by alternates in active mode.
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namespace __cxx1998
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{
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# if _GLIBCXX_INLINE_VERSION
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inline namespace __7 { }
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# endif
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# if _GLIBCXX_USE_CXX11_ABI
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inline namespace __cxx11 __attribute__((__abi_tag__ ("cxx11"))) { }
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# endif
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}
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// Inline namespace for debug mode.
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# ifdef _GLIBCXX_DEBUG
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inline namespace __debug { }
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# endif
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// Inline namespaces for parallel mode.
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# ifdef _GLIBCXX_PARALLEL
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inline namespace __parallel { }
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# endif
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// Inline namespaces for profile mode
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# ifdef _GLIBCXX_PROFILE
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inline namespace __profile { }
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# endif
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}
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// Check for invalid usage and unsupported mixed-mode use.
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# if defined(_GLIBCXX_DEBUG) && defined(_GLIBCXX_PARALLEL)
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# error illegal use of multiple inlined namespaces
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# endif
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# if defined(_GLIBCXX_PROFILE) && defined(_GLIBCXX_DEBUG)
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# error illegal use of multiple inlined namespaces
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# endif
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# if defined(_GLIBCXX_PROFILE) && defined(_GLIBCXX_PARALLEL)
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# error illegal use of multiple inlined namespaces
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# endif
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// Check for invalid use due to lack for weak symbols.
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# if __NO_INLINE__ && !__GXX_WEAK__
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# warning currently using inlined namespace mode which may fail \
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without inlining due to lack of weak symbols
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# endif
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#endif
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// Macros for namespace scope. Either namespace std:: or the name
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// of some nested namespace within it corresponding to the active mode.
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// _GLIBCXX_STD_A
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// _GLIBCXX_STD_C
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//
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// Macros for opening/closing conditional namespaces.
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// _GLIBCXX_BEGIN_NAMESPACE_ALGO
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// _GLIBCXX_END_NAMESPACE_ALGO
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// _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
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// _GLIBCXX_END_NAMESPACE_CONTAINER
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#if defined(_GLIBCXX_DEBUG) || defined(_GLIBCXX_PROFILE)
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# define _GLIBCXX_STD_C __cxx1998
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# define _GLIBCXX_BEGIN_NAMESPACE_CONTAINER \
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namespace _GLIBCXX_STD_C { _GLIBCXX_BEGIN_NAMESPACE_VERSION
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# define _GLIBCXX_END_NAMESPACE_CONTAINER \
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_GLIBCXX_END_NAMESPACE_VERSION }
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#endif
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#ifdef _GLIBCXX_PARALLEL
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# define _GLIBCXX_STD_A __cxx1998
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# define _GLIBCXX_BEGIN_NAMESPACE_ALGO \
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namespace _GLIBCXX_STD_A { _GLIBCXX_BEGIN_NAMESPACE_VERSION
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# define _GLIBCXX_END_NAMESPACE_ALGO \
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_GLIBCXX_END_NAMESPACE_VERSION }
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#endif
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#ifndef _GLIBCXX_STD_A
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# define _GLIBCXX_STD_A std
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#endif
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#ifndef _GLIBCXX_STD_C
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# define _GLIBCXX_STD_C std
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#endif
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#ifndef _GLIBCXX_BEGIN_NAMESPACE_ALGO
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# define _GLIBCXX_BEGIN_NAMESPACE_ALGO
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#endif
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#ifndef _GLIBCXX_END_NAMESPACE_ALGO
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# define _GLIBCXX_END_NAMESPACE_ALGO
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#endif
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#ifndef _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
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# define _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
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#endif
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#ifndef _GLIBCXX_END_NAMESPACE_CONTAINER
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# define _GLIBCXX_END_NAMESPACE_CONTAINER
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#endif
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// GLIBCXX_ABI Deprecated
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// Define if compatibility should be provided for -mlong-double-64.
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#undef _GLIBCXX_LONG_DOUBLE_COMPAT
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// Inline namespace for long double 128 mode.
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#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
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namespace std
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{
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inline namespace __gnu_cxx_ldbl128 { }
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}
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# define _GLIBCXX_NAMESPACE_LDBL __gnu_cxx_ldbl128::
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# define _GLIBCXX_BEGIN_NAMESPACE_LDBL namespace __gnu_cxx_ldbl128 {
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# define _GLIBCXX_END_NAMESPACE_LDBL }
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#else
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# define _GLIBCXX_NAMESPACE_LDBL
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# define _GLIBCXX_BEGIN_NAMESPACE_LDBL
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# define _GLIBCXX_END_NAMESPACE_LDBL
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#endif
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#if _GLIBCXX_USE_CXX11_ABI
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# define _GLIBCXX_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_NAMESPACE_CXX11
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# define _GLIBCXX_BEGIN_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_BEGIN_NAMESPACE_CXX11
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# define _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_END_NAMESPACE_CXX11
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#else
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# define _GLIBCXX_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_NAMESPACE_LDBL
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# define _GLIBCXX_BEGIN_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_BEGIN_NAMESPACE_LDBL
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# define _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_END_NAMESPACE_LDBL
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#endif
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// Debug Mode implies checking assertions.
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#ifdef _GLIBCXX_DEBUG
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# define _GLIBCXX_ASSERTIONS 1
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#endif
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// Disable std::string explicit instantiation declarations in order to assert.
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#ifdef _GLIBCXX_ASSERTIONS
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# undef _GLIBCXX_EXTERN_TEMPLATE
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# define _GLIBCXX_EXTERN_TEMPLATE -1
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#endif
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// Assert.
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#if !defined(_GLIBCXX_ASSERTIONS) && !defined(_GLIBCXX_PARALLEL)
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# define __glibcxx_assert(_Condition)
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#else
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namespace std
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{
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// Avoid the use of assert, because we're trying to keep the <cassert>
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// include out of the mix.
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inline void
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__replacement_assert(const char* __file, int __line,
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const char* __function, const char* __condition)
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{
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__builtin_printf("%s:%d: %s: Assertion '%s' failed.\n", __file, __line,
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__function, __condition);
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__builtin_abort();
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}
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}
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#define __glibcxx_assert(_Condition) \
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do \
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{ \
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if (! (_Condition)) \
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std::__replacement_assert(__FILE__, __LINE__, __PRETTY_FUNCTION__, \
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#_Condition); \
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} while (false)
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#endif
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// Macros for race detectors.
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// _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(A) and
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// _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(A) should be used to explain
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// atomic (lock-free) synchronization to race detectors:
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// the race detector will infer a happens-before arc from the former to the
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// latter when they share the same argument pointer.
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//
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// The most frequent use case for these macros (and the only case in the
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// current implementation of the library) is atomic reference counting:
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// void _M_remove_reference()
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// {
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// _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&this->_M_refcount);
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// if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount, -1) <= 0)
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// {
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// _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&this->_M_refcount);
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// _M_destroy(__a);
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// }
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// }
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// The annotations in this example tell the race detector that all memory
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// accesses occurred when the refcount was positive do not race with
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// memory accesses which occurred after the refcount became zero.
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#ifndef _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE
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# define _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(A)
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#endif
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#ifndef _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER
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# define _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(A)
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#endif
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// Macros for C linkage: define extern "C" linkage only when using C++.
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# define _GLIBCXX_BEGIN_EXTERN_C extern "C" {
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# define _GLIBCXX_END_EXTERN_C }
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#define _GLIBCXX_USE_ALLOCATOR_NEW
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#else // !__cplusplus
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# define _GLIBCXX_BEGIN_EXTERN_C
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# define _GLIBCXX_END_EXTERN_C
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#endif
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// First includes.
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// Pick up any OS-specific definitions.
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#include <bits/os_defines.h>
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// Pick up any CPU-specific definitions.
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#include <bits/cpu_defines.h>
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// If platform uses neither visibility nor psuedo-visibility,
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// specify empty default for namespace annotation macros.
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#ifndef _GLIBCXX_PSEUDO_VISIBILITY
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# define _GLIBCXX_PSEUDO_VISIBILITY(V)
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#endif
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// Certain function definitions that are meant to be overridable from
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// user code are decorated with this macro. For some targets, this
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// macro causes these definitions to be weak.
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#ifndef _GLIBCXX_WEAK_DEFINITION
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# define _GLIBCXX_WEAK_DEFINITION
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#endif
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// By default, we assume that __GXX_WEAK__ also means that there is support
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// for declaring functions as weak while not defining such functions. This
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// allows for referring to functions provided by other libraries (e.g.,
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// libitm) without depending on them if the respective features are not used.
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#ifndef _GLIBCXX_USE_WEAK_REF
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# define _GLIBCXX_USE_WEAK_REF __GXX_WEAK__
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#endif
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// Conditionally enable annotations for the Transactional Memory TS on C++11.
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// Most of the following conditions are due to limitations in the current
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// implementation.
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#if __cplusplus >= 201103L && _GLIBCXX_USE_CXX11_ABI \
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&& _GLIBCXX_USE_DUAL_ABI && __cpp_transactional_memory >= 201505L \
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&& !_GLIBCXX_FULLY_DYNAMIC_STRING && _GLIBCXX_USE_WEAK_REF \
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&& _GLIBCXX_USE_ALLOCATOR_NEW
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#define _GLIBCXX_TXN_SAFE transaction_safe
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#define _GLIBCXX_TXN_SAFE_DYN transaction_safe_dynamic
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#else
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#define _GLIBCXX_TXN_SAFE
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#define _GLIBCXX_TXN_SAFE_DYN
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#endif
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// The remainder of the prewritten config is automatic; all the
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// user hooks are listed above.
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// Create a boolean flag to be used to determine if --fast-math is set.
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#ifdef __FAST_MATH__
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# define _GLIBCXX_FAST_MATH 1
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#else
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# define _GLIBCXX_FAST_MATH 0
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#endif
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// This marks string literals in header files to be extracted for eventual
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// translation. It is primarily used for messages in thrown exceptions; see
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// src/functexcept.cc. We use __N because the more traditional _N is used
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// for something else under certain OSes (see BADNAMES).
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#define __N(msgid) (msgid)
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// For example, <windows.h> is known to #define min and max as macros...
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#undef min
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#undef max
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// N.B. these _GLIBCXX_USE_C99_XXX macros are defined unconditionally
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// so they should be tested with #if not with #ifdef.
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#if __cplusplus >= 201103L
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# ifndef _GLIBCXX_USE_C99_MATH
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# define _GLIBCXX_USE_C99_MATH _GLIBCXX11_USE_C99_MATH
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# endif
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# ifndef _GLIBCXX_USE_C99_COMPLEX
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# define _GLIBCXX_USE_C99_COMPLEX _GLIBCXX11_USE_C99_COMPLEX
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# endif
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# ifndef _GLIBCXX_USE_C99_STDIO
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# define _GLIBCXX_USE_C99_STDIO _GLIBCXX11_USE_C99_STDIO
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# endif
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# ifndef _GLIBCXX_USE_C99_STDLIB
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# define _GLIBCXX_USE_C99_STDLIB _GLIBCXX11_USE_C99_STDLIB
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# endif
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# ifndef _GLIBCXX_USE_C99_WCHAR
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# define _GLIBCXX_USE_C99_WCHAR _GLIBCXX11_USE_C99_WCHAR
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# endif
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#else
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# ifndef _GLIBCXX_USE_C99_MATH
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# define _GLIBCXX_USE_C99_MATH _GLIBCXX98_USE_C99_MATH
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# endif
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# ifndef _GLIBCXX_USE_C99_COMPLEX
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# define _GLIBCXX_USE_C99_COMPLEX _GLIBCXX98_USE_C99_COMPLEX
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# endif
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# ifndef _GLIBCXX_USE_C99_STDIO
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# define _GLIBCXX_USE_C99_STDIO _GLIBCXX98_USE_C99_STDIO
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# endif
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# ifndef _GLIBCXX_USE_C99_STDLIB
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# define _GLIBCXX_USE_C99_STDLIB _GLIBCXX98_USE_C99_STDLIB
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# endif
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# ifndef _GLIBCXX_USE_C99_WCHAR
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# define _GLIBCXX_USE_C99_WCHAR _GLIBCXX98_USE_C99_WCHAR
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# endif
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#endif
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// End of prewritten config; the settings discovered at configure time follow.
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