I'm working on a package that would be USE_BUILDLINK_ONLY, except that
devel/cdk doesn't have a buildlink.mk. A while ago I threw one together,
but I don't know if it covers all the bases (I don't have a -current
machine to try it with, for example). Can someone more familiar with
libcdk take a look at this?

http://netbsd.schmonz.com/misc/devel-cdk-buildlink.mk

Thanks,

- Amitai