AC_DEFUN([AC_NETATALK_REALPATH], [
AC_CACHE_CHECK([if the realpath function allows a NULL argument],
neta_cv_REALPATH_TAKES_NULL, [
AC_DEFUN([AC_NETATALK_REALPATH], [
AC_CACHE_CHECK([if the realpath function allows a NULL argument],
neta_cv_REALPATH_TAKES_NULL, [