~mdw / runlisp / blame
| Commit | Line | Data |
|---|---|---|
| fb2149fc MW |
1 | dnl -*-autoconf-*- |
| 2 | ||
| 0bef29cb MW |
3 | ### SYNOPSIS |
| 4 | ### | |
| 5 | ### mdw_DECL_ENVIRON | |
| 6 | ### | |
| 7 | ### DESCRIPTION | |
| 8 | ### | |
| 9 | ### Define a preprocessor symbol `DECL_ENVIRON' if the `environ' vector is | |
| 10 | ### declared in one of the `usual' places. | |
| 11 | ### | |
| 12 | ### LICENSE | |
| 13 | ### | |
| 14 | ### Copyright (c) 1999 Mark Wooding <mdw@distorted.org.uk> | |
| 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 |
| fb2149fc MW |
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]) |