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1 | dnl -*-autoconf-*- |
2 | ||
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3 | ### SYNOPSIS |
4 | ### | |
1dff83f1 | 5 | ### mdw_DECL_ENVIRON |
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6 | ### |
7 | ### DESCRIPTION | |
8 | ### | |
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9 | ### Define a preprocessor symbol `DECL_ENVIRON' if the `environ' vector is |
10 | ### declared in one of the `usual' places. | |
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11 | ### |
12 | ### LICENSE | |
13 | ### | |
1dff83f1 | 14 | ### Copyright (c) 1999 Mark Wooding <mdw@distorted.org.uk> |
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15 | ### |
16 | ### This program is free software: you can redistribute it and/or modify it | |
17 | ### under the terms of the GNU General Public License as published by the | |
18 | ### Free Software Foundation, either version 2 of the License, or (at your | |
19 | ### option) any later version. | |
20 | ### | |
21 | ### This program is distributed in the hope that it will be useful, but | |
22 | ### WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
24 | ### General Public License for more details. | |
25 | ### | |
26 | ### You should have received a copy of the GNU General Public License along | |
27 | ### with this program. If not, see <http://www.gnu.org/licenses/>. | |
28 | ### | |
29 | ### As a special exception, the respective Autoconf Macro's copyright owner | |
30 | ### gives unlimited permission to copy, distribute and modify the configure | |
31 | ### scripts that are the output of Autoconf when processing the Macro. You | |
32 | ### need not follow the terms of the GNU General Public License when using | |
33 | ### or distributing such scripts, even though portions of the text of the | |
34 | ### Macro appear in them. The GNU General Public License (GPL) does govern | |
35 | ### all other use of the material that constitutes the Autoconf Macro. | |
36 | ### | |
37 | ### This special exception to the GPL applies to versions of the Autoconf | |
38 | ### Macro released by the Autoconf Archive. When you make and distribute a | |
39 | ### modified version of the Autoconf Macro, you may extend this special | |
40 | ### exception to the GPL to apply to your modified version as well. | |
fb2149fc | 41 | |
0bef29cb | 42 | # serial 1 |
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43 | AC_DEFUN([mdw_DECL_ENVIRON], |
44 | [AC_CACHE_CHECK([for declaration of \`environ'], mdw_cv_environ, | |
45 | [AC_EGREP_CPP([\<environ\>], | |
46 | [#include <sys/types.h> | |
47 | #if HAVE_UNISTD_H | |
48 | #include <unistd.h> | |
49 | #endif | |
50 | #if STDC_HEADERS | |
51 | #include <stdlib.h> | |
52 | #include <stddef.h> | |
53 | #endif], [mdw_cv_environ=yes], [mdw_cv_environ=no])]) | |
54 | if test $mdw_cv_environ = yes; then | |
55 | AC_DEFINE([DECL_ENVIRON], [1], | |
56 | [Define if you have the `environ' vector of environment variables.]) | |
57 | fi]) |