-# dirent_h.m4 serial 8
+# dirent_h.m4 serial 9
dnl Copyright (C) 2008-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl <dirent.h> is always overridden, because of GNULIB_POSIXCHECK.
gl_CHECK_NEXT_HEADERS([dirent.h])
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[#include <dirent.h>
+ ]], [alphasort dirfd fdopendir scandir])
])
dnl Unconditionally enables the replacement of <dirent.h>.