#serial 5 # Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. # # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # Written by Paul Eggert. AC_DEFUN([gl_UNLINKDIR], [ AC_REQUIRE([AC_CANONICAL_HOST]) AC_CHECK_HEADERS_ONCE(priv.h) AC_LIBOBJ([unlinkdir]) # The Hurd, the Linux kernel, the FreeBSD kernel version 2.2 and later, # and Cygwin never let anyone (even root) unlink directories. # If anyone knows of another system for which unlink can never # remove a directory, please report it to <bug-coreutils@gnu.org>. # Unfortunately this is difficult to test for, since it requires root access # and might create garbage in the file system, # so the code below simply relies on the kernel name and version number. case $host in *-*-gnu[[0-9]]* | \ *-*-linux-* | *-*-linux | \ *-*-freebsd2.2* | *-*-freebsd[[3-9]]* | *-*-freebsd[[1-9]][[0-9]]* | \ *-cygwin) AC_DEFINE([UNLINK_CANNOT_UNLINK_DIR], 1, [Define to 1 if unlink (dir) cannot possibly succeed.]);; esac ])