os_defines.h revision 1.1.1.1.8.1
1// Specific definitions for Darwin -*- C++ -*- 2 3// Copyright (C) 2004-2013 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 3, 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// Under Section 7 of GPL version 3, you are granted additional 17// permissions described in the GCC Runtime Library Exception, version 18// 3.1, as published by the Free Software Foundation. 19 20// You should have received a copy of the GNU General Public License and 21// a copy of the GCC Runtime Library Exception along with this program; 22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23// <http://www.gnu.org/licenses/>. 24 25 26#ifndef _GLIBCXX_OS_DEFINES 27#define _GLIBCXX_OS_DEFINES 1 28 29// System-specific #define, typedefs, corrections, etc, go here. This 30// file will come before all others. 31 32/* Darwin has the pthread routines in libSystem, which every program 33 links to, so there's no need for weak-ness for that. */ 34#define _GLIBCXX_GTHREAD_USE_WEAK 0 35 36// On Darwin, in order to enable overriding of operator new and delete, 37// GCC makes the definition of these functions weak, relies on the 38// loader to implement weak semantics properly, and uses 39// -flat_namespace to work around the way that it doesn't. 40#define _GLIBCXX_WEAK_DEFINITION __attribute__ ((weak)) 41 42// Static initializer macro is buggy in darwin, see libstdc++/51906 43#define _GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC 44 45// Configure checks for nanosleep fail on Darwin, but nanosleep and 46// sched_yield are always available, so use them. 47#define _GLIBCXX_USE_NANOSLEEP 1 48#define _GLIBCXX_USE_SCHED_YIELD 1 49 50#endif 51