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

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

// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
// 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 2, 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.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#ifndef _CPP_CPPCONFIG
#define _CPP_CPPCONFIG 1

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

// The current version of the C++ library in compressed ISO date format.
#define __GLIBCPP__ 20030418

// This is necessary until GCC supports separate template compilation.
#define _GLIBCPP_NO_TEMPLATE_EXPORT 1

// This is a hack around not having either pre-compiled headers or
// export compilation. If defined, the io, string, and valarray
// headers will include all the necessary bits. If not defined, the
// implementation optimizes the headers for the most commonly-used
// types. For the io library, this means that larger, out-of-line
// member functions are only declared, and definitions are not parsed
// by the compiler, but instead instantiated into the library binary.
#define _GLIBCPP_FULLY_COMPLIANT_HEADERS 1

// Allow use of the GNU syntax extension, "extern template." This
// extension is fully documented in the g++ manual, but in a nutshell,
// 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.
#ifndef _GLIBCPP_EXTERN_TEMPLATE
#define _GLIBCPP_EXTERN_TEMPLATE 1
#endif

// To enable older, ARM-style iostreams and other anachronisms use this.
//#define _GLIBCPP_DEPRECATED 1

// Use corrected code from the committee library group's issues list.
#define _GLIBCPP_RESOLVE_LIB_DEFECTS 1

// Hopefully temporary workaround to autoconf/m4 issue with quoting '@'.
#define _GLIBCPP_AT_AT "@@"

// In those parts of the standard C++ library that use a mutex instead
// of a spin-lock, we now unconditionally use GCC's gthr.h mutex
// abstraction layer.  All support to directly map to various
// threading models has been removed.  Note: gthr.h may well map to
// gthr-single.h which is a correct way to express no threads support
// in gcc.  Support for the undocumented _NOTHREADS has been removed.

// Default to the typically high-speed, pool-based allocator (as
// libstdc++-v2) instead of the malloc-based allocator (libstdc++-v3
// snapshots).  See libstdc++-v3/docs/html/17_intro/howto.html for
// details on why you don't want to override this setting.  Ensure
// that threads are properly configured on your platform before
// assigning blame to the STL container-memory allocator.  After doing
// so, please report any possible issues to libstdc++@gcc.gnu.org .
// Do not define __USE_MALLOC on the command line.  Enforce it here:
#ifdef __USE_MALLOC
#error __USE_MALLOC should never be defined.  Read the release notes.
#endif

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

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

// End of prewritten config; the discovered settings follow.