Crosscompiling OBSD kernels?

[michael smith <miff_(_at_)_spam_(_dot_)_frisbee_(_dot_)_net_(_dot_)_au>]

Just wondering if anyone is successfully crosscompiling an OBSD 
kernel under another operating system (and platform, I guess).

I'm having some minor grief with this in combination with a new
port; in particular libkern/libcompat don't depend or build right.
It _looks_ to me like the flags aren't propagating out to the
lib* makefiles.  

I'm using the current OBSD make(1) and config(8).

Any comments?
Mike