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/* Declare the environ system variable.
Copyright (C) 2015-2022 Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
/* On OSX, the environ variable can be used directly in the code of an
executable, but cannot be used in the code of a shared library (such as
GCC's liblto_plugin, which links in libiberty code). Instead, the
function _NSGetEnviron can be called to get the address of environ. */
#ifndef HAVE_ENVIRON_DECL
# ifdef __APPLE__
# include <crt_externs.h>
# define environ (*_NSGetEnviron ())
# else
# ifndef environ
extern char **environ;
# endif
# endif
# define HAVE_ENVIRON_DECL
#endif
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