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fb2149fc MW |
1 | dnl -*-autoconf-*- |
2 | ||
3 | dnl --- *@-mdw_DECL_ENVIRON-@* --- | |
4 | dnl | |
5 | dnl Author: Mark Wooding | |
6 | dnl | |
7 | dnl Synopsis: mdw_DECL_ENVIRON | |
8 | dnl | |
9 | dnl Arguments: --- | |
10 | dnl | |
11 | dnl Use: Searches for a declaration of the global `environ' variable. | |
12 | dnl If one is found in one of the `usual' places, DECL_ENVIRON | |
13 | dnl is defined as a preprocessor symbol. | |
14 | ||
15 | AC_DEFUN([mdw_DECL_ENVIRON], | |
16 | [AC_CACHE_CHECK([for declaration of \`environ'], mdw_cv_environ, | |
17 | [AC_EGREP_CPP([\<environ\>], | |
18 | [#include <sys/types.h> | |
19 | #if HAVE_UNISTD_H | |
20 | #include <unistd.h> | |
21 | #endif | |
22 | #if STDC_HEADERS | |
23 | #include <stdlib.h> | |
24 | #include <stddef.h> | |
25 | #endif], [mdw_cv_environ=yes], [mdw_cv_environ=no])]) | |
26 | if test $mdw_cv_environ = yes; then | |
27 | AC_DEFINE([DECL_ENVIRON], [1], | |
28 | [Define if you have the `environ' vector of environment variables.]) | |
29 | fi]) |