Sorry this is dragging on.  I'm nursing code I did not write,
that was written a long time ago, before a lot of interfaces
changed.  Some of the new interfaces I'm not familiar with myself.

Let's simplify this.  Here is the new target, *without* corefile
support.  This will get the infrastructure into place, including
shared libraries, and then I can rework and submit the corefile
part separately.  Then I won't accidentally overlook the makefile
fragment or something next time.