1 /* Declare the environ system variable.
2 Copyright (C) 2015-2019 Free Software Foundation, Inc.
4 This file is part of the libiberty library.
5 Libiberty is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
10 Libiberty is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with libiberty; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
18 Boston, MA 02110-1301, USA. */
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. */
25 #ifndef HAVE_ENVIRON_DECL
27 # include <crt_externs.h>
28 # define environ (*_NSGetEnviron ())
31 extern char **environ
;
34 # define HAVE_ENVIRON_DECL
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