gEDA-user: PCB: No vias under SMDs

[Christoph Lechner <cl0002@xxxxxxx>]

Hello,

is it possible to tell the PCB auto-router that it should
not place any vias under SMDs. It would be very "nice",
because I usually make my prototype PCBs on my own. So as
my home made vias aren't flat (I drill a hole and solder
in a wire ...) the vias may not be under SMD devices.

Is it right that PCB uses a cost based auto-router, i.e.
one that adds a penality for each via, for the length of a
track etc.?
If yes, would it be possible to add a *very* high penality
for a via under a SMD device?

Because there are some PCB hackers out there, can you tell
me where to start? I got many years of C experience and so
maybe I can code a patch for this feature if you give me
some ideas ...

regards,
Christoph Lechner