My message to kstailey@eagle.dol-esa.gov bounced so I'm mailing this
to current-users. It seems that make build needs yet another target.

>> ===> libkern
>> make: don't know how to make adddi3.c. Stop
>> *** Error code 2
>> 
>> Stop.
>
>Did you "cd /usr/src/share/mk; make install"?

If that were necessary, it should be added to the build target. But I
wonder - would that work if DESTDIR is set?

As has been noted, the above problem seems to be caused by the fact
that depend target descends to libkern and it should not.