2 dnl Copyright (C) 2004-2011 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 # Written by Jim Meyering.
9 # If we have the fstatat function, and it has the bug (in AIX 7.1)
10 # that it does not fill in st_size correctly, use the replacement function.
11 AC_DEFUN([gl_FUNC_FSTATAT],
13 AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
14 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
15 AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
16 AC_CHECK_FUNCS_ONCE([fstatat])
18 if test $ac_cv_func_fstatat = no; then
21 dnl Test for an AIX 7.1 bug; see
22 dnl <http://lists.gnu.org/archive/html/bug-tar/2011-09/msg00015.html>.
23 AC_CACHE_CHECK([whether fstatat (..., 0) works],
24 [gl_cv_func_fstatat_zero_flag],
34 return fstatat (AT_FDCWD, ".", &a, 0) != 0;
37 [gl_cv_func_fstatat_zero_flag=yes],
38 [gl_cv_func_fstatat_zero_flag=no],
39 [gl_cv_func_fstatat_zero_flag=cross-compiling])])
41 case $gl_cv_func_fstatat_zero_flag+$gl_cv_func_lstat_dereferences_slashed_symlink in
44 if test $gl_cv_func_fstatat_zero_flag = yes; then
45 AC_DEFINE([HAVE_WORKING_FSTATAT_ZERO_FLAG], [1],
46 [Define to 1 if fstatat (..., 0) works.
47 For example, it does not work in AIX 7.1.])