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Roland McGrathefd40fc2015-10-18 10:33:37 +00001/* Declare the environ system variable.
Jakub Jelinek99dee822021-01-04 10:26:59 +01002 Copyright (C) 2015-2021 Free Software Foundation, Inc.
Roland McGrathefd40fc2015-10-18 10:33:37 +00003
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
Eli Zaretskii0ff09022017-05-20 01:22:07 +000030# ifndef environ
Roland McGrathefd40fc2015-10-18 10:33:37 +000031extern char **environ;
Eli Zaretskii0ff09022017-05-20 01:22:07 +000032# endif
Roland McGrathefd40fc2015-10-18 10:33:37 +000033# endif
34# define HAVE_ENVIRON_DECL
35#endif