aboutsummaryrefslogtreecommitdiff
path: root/include/environ.h
blob: bd36f91bcd7b9530990fcdd071e936c1593a1c0f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
/* Declare the environ system variable.
   Copyright (C) 2015-2020 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