1 # getcwd.m4 - check for working getcwd that is compatible with glibc
3 # Copyright (C) 2001, 2003, 2004 Free Software Foundation, Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2, or (at your option)
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software Foundation,
17 # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 # Written by Paul Eggert.
21 AC_DEFUN([gl_FUNC_GETCWD_NULL],
23 AC_CHECK_HEADERS_ONCE(unistd.h)
24 AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
25 [gl_cv_func_getcwd_null],
42 char *f = getcwd (NULL, 0);
43 exit (! (f && f[0] == '/' && !f[1]));
46 [gl_cv_func_getcwd_null=yes],
47 [gl_cv_func_getcwd_null=no],
48 [gl_cv_func_getcwd_null=no])])
51 AC_DEFUN([gl_FUNC_GETCWD],
53 AC_REQUIRE([gl_FUNC_GETCWD_NULL])
55 case $gl_cv_func_getcwd_null in
56 yes) gl_FUNC_GETCWD_PATH_MAX;;
59 case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max in
63 AC_DEFINE([__GETCWD_PREFIX], [[rpl_]],
64 [Define to rpl_ if the getcwd replacement function should be used.])
69 # Prerequisites of lib/getcwd.c.
70 AC_DEFUN([gl_PREREQ_GETCWD],
72 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
73 AC_REQUIRE([AC_HEADER_DIRENT])
74 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO])
75 AC_CHECK_HEADERS_ONCE(fcntl.h)