Add empty m4 directory.
/* $Id$ */
digraph slavescan {
size="1,7"
start [fontname="Helvetica"]
start -> address [weight=10]
address [fontname="Helvetica"]
address -> state [weight=10]
state [fontname="Helvetica"]
state -> base [weight=10]
base [fontname="Helvetica"]
base -> dc_cap [weight=10]
base -> enter_datalink [fontname="Helvetica", label="DC not\nsupported"]
dc_cap [fontname="Helvetica"]
dc_cap -> enter_datalink [weight=10]
enter_datalink [shape=point, label=""]
enter_datalink -> datalink [weight=10]
datalink [fontname="Helvetica"]
datalink -> sii_size [weight=10]
sii_size [fontname="Helvetica"]
sii_size -> sii_data [weight=10]
sii_data [fontname="Helvetica"]
sii_data -> end [fontname="Helvetica", label="No category\ndata"]
sii_data -> enter_preop [weight=10]
enter_preop [shape=point, label=""]
enter_preop -> preop [fontname="Helvetica", label="Not in\nPREOP"]
enter_preop -> sync [weight=10]
preop [fontname="Helvetica"]
preop -> enter_pdos [weight=10]
sync [fontname="Helvetica"]
sync -> enter_pdos [weight=10]
enter_pdos [shape=point, label=""]
enter_pdos -> pdos [weight=10]
pdos [fontname="Helvetica"]
pdos -> end [weight=10]
end [fontname="Helvetica"]
}