-# There are two complications here. First, if "python" or "dot" is not
-# available, then we have to just use the existing diagram. Second, different
-# "dot" versions produce slightly different output for the same input, but we
-# don't want to gratuitously change vswitch.pic if someone tweaks the schema in
-# some minor way that doesn't affect the table structure. To avoid that we
-# store a checksum of vswitch.gv in vswitch.pic and only regenerate vswitch.pic
-# if vswitch.gv actually changes.
-$(srcdir)/vswitchd/vswitch.gv: ovsdb/ovsdb-dot.in vswitchd/vswitch.ovsschema