1/* Declare the environ system variable. 2 Copyright (C) 2015-2017 Free Software Foundation, Inc. 3 4This file is part of the libiberty library. 5Libiberty is free software; you can redistribute it and/or 6modify it under the terms of the GNU Library General Public 7License as published by the Free Software Foundation; either 8version 2 of the License, or (at your option) any later version. 9 10Libiberty is distributed in the hope that it will be useful, 11but WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13Library General Public License for more details. 14 15You should have received a copy of the GNU Library General Public 16License along with libiberty; see the file COPYING.LIB. If not, 17write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 18Boston, MA 02110-1301, USA. */ 19 20/* On OSX, the environ variable can be used directly in the code of an 21 executable, but cannot be used in the code of a shared library (such as 22 GCC's liblto_plugin, which links in libiberty code). Instead, the 23 function _NSGetEnviron can be called to get the address of environ. */ 24 25#ifndef HAVE_ENVIRON_DECL 26# ifdef __APPLE__ 27# include <crt_externs.h> 28# define environ (*_NSGetEnviron ()) 29# else 30extern char **environ; 31# endif 32# define HAVE_ENVIRON_DECL 33#endif 34