os_defines.h revision 296373
1// Specific definitions for Darwin -*- C++ -*- 2 3// Copyright (C) 2004 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 2, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30 31#ifndef _GLIBCXX_OS_DEFINES 32#define _GLIBCXX_OS_DEFINES 1 33 34// System-specific #define, typedefs, corrections, etc, go here. This 35// file will come before all others. 36 37/* Darwin has the pthread routines in libSystem, which every program 38 links to, so there's no need for weak-ness for that. */ 39#define _GLIBCXX_GTHREAD_USE_WEAK 0 40 41// On Darwin, in order to enable overriding of operator new and delete, 42// GCC makes the definition of these functions weak, relies on the 43// loader to implement weak semantics properly, and uses 44// -flat_namespace to work around the way that it doesn't. 45#define _GLIBCXX_WEAK_DEFINITION __attribute__ ((weak)) 46 47#endif 48