m4_define([PW_WARN_ALWAYS_ON],[no])
ifdef([m4_define],,[define([m4_define], defn([define]))])
ifdef([m4_undefine],,[define([m4_undefine], defn([undefine]))])
m4_define([PW_WARN_ALWAYS_ON],[no])
ifdef([m4_define],,[define([m4_define], defn([define]))])
ifdef([m4_undefine],,[define([m4_undefine], defn([undefine]))])