This is a very nice feature - dynamic linking of "ppumove'd" units with the "-XD" option.
But it isn't possible use this with smartlinking for other units... May be best to add this variant?

I see two ways:

1. Simple: preferred order - if the "-XD" key is used, for any unit compiler try link it dinamically,
then smart, then static. I think to make this patch in a small time.

2. Complex: parse command line switchs with they position, and take priorities from order:
first way in this case must seems as "-XDXS" or "-XDX".

What's about this?