3 # Copyright (C) 2005 Free Software Foundation, Inc.
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.
11 AC_DEFUN([gl_UNLINKDIR],
13 AC_REQUIRE([AC_CANONICAL_HOST])
14 AC_CHECK_HEADERS_ONCE(priv.h)
16 AC_LIBSOURCES([unlinkdir.c, unlinkdir.h])
17 AC_LIBOBJ([unlinkdir])
19 # The Hurd, the Linux kernel, the FreeBSD kernel version 2.2 and later,
20 # and Cygwin never let anyone (even root) unlink directories.
21 # If anyone knows of another system for which unlink can never
22 # remove a directory, please report it to <bug-coreutils@gnu.org>.
23 # Unfortunately this is difficult to test for, since it requires root access
24 # and might create garbage in the file system,
25 # so the code below simply relies on the kernel name and version number.
28 *-*-linux-* | *-*-linux | \
29 *-*-freebsd2.2* | *-*-freebsd[3-9]* | *-*-freebsd[1-9][0-9]* | \
31 AC_DEFINE([UNLINK_CANNOT_UNLINK_DIR], 1,
32 [Define to 1 if unlink (dir) cannot possibly succeed.]);;