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