1 # getcwd.m4 - check for working getcwd that is compatible with glibc
3 # Copyright (C) 2001, 2003, 2004, 2005, 2006, 2007, 2009, 2010 Free Software
5 # This file is free software; the Free Software Foundation
6 # gives unlimited permission to copy and/or distribute it,
7 # with or without modifications, as long as this notice is preserved.
9 # Written by Paul Eggert.
12 AC_DEFUN([gl_FUNC_GETCWD_NULL],
14 AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
15 [gl_cv_func_getcwd_null],
16 [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
22 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
23 /* mingw cwd does not start with '/', but getcwd does allocate. */
29 char *f = getcwd (NULL, 0);
40 [gl_cv_func_getcwd_null=yes],
41 [gl_cv_func_getcwd_null=no],
44 # Guess yes on glibc systems.
45 *-gnu*) gl_cv_func_getcwd_null="guessing yes";;
46 # Guess yes on Cygwin.
47 cygwin*) gl_cv_func_getcwd_null="guessing yes";;
49 mingw*) gl_cv_func_getcwd_null="guessing yes";;
50 # If we don't know, assume the worst.
51 *) gl_cv_func_getcwd_null="guessing no";;
56 AC_DEFUN([gl_FUNC_GETCWD],
58 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
59 AC_REQUIRE([gl_FUNC_GETCWD_NULL])
60 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
63 case $gl_cv_func_getcwd_null,$host_os in
65 gl_cv_func_getcwd_path_max=yes;;
67 gl_FUNC_GETCWD_PATH_MAX
68 gl_FUNC_GETCWD_ABORT_BUG([gl_abort_bug=yes]);;
71 case $gl_cv_func_getcwd_null,$gl_cv_func_getcwd_path_max,$gl_abort_bug in
80 # Prerequisites of lib/getcwd.c.
81 AC_DEFUN([gl_PREREQ_GETCWD],
83 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
84 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_DIRENT_D_INO])