1 # getcwd.m4 - check for working getcwd that is compatible with glibc
3 # Copyright (C) 2001, 2003-2007, 2009-2011 Free Software Foundation, Inc.
4 # This file is free software; the Free Software Foundation
5 # gives unlimited permission to copy and/or distribute it,
6 # with or without modifications, as long as this notice is preserved.
8 # Written by Paul Eggert.
11 AC_DEFUN([gl_FUNC_GETCWD_NULL],
13 AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
14 [gl_cv_func_getcwd_null],
15 [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
21 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
22 /* mingw cwd does not start with '/', but getcwd does allocate. */
28 char *f = getcwd (NULL, 0);
39 [gl_cv_func_getcwd_null=yes],
40 [gl_cv_func_getcwd_null=no],
43 # Guess yes on glibc systems.
44 *-gnu*) gl_cv_func_getcwd_null="guessing yes";;
45 # Guess yes on Cygwin.
46 cygwin*) gl_cv_func_getcwd_null="guessing yes";;
48 mingw*) gl_cv_func_getcwd_null="guessing yes";;
49 # If we don't know, assume the worst.
50 *) gl_cv_func_getcwd_null="guessing no";;
55 AC_DEFUN([gl_FUNC_GETCWD],
57 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
58 AC_REQUIRE([gl_FUNC_GETCWD_NULL])
59 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
62 case $gl_cv_func_getcwd_null,$host_os in
64 gl_cv_func_getcwd_path_max=yes;;
66 gl_FUNC_GETCWD_PATH_MAX
67 gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]);;
70 case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max,$gl_abort_bug in
79 # Prerequisites of lib/getcwd.c.
80 AC_DEFUN([gl_PREREQ_GETCWD],
82 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
83 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO])