Undefined symbol _kvm_open

[JAMES RAZMUS II <lotsomail_(_at_)_usa_(_dot_)_net>]

I am trying to port the Proc::ProcessTable Perl Module to OpenBSD 2.9.  I am
using the kvm interface to fetch process information.  I have written some c
code to do this which compiles to a .o file just fine.  It then gets combined
with ProcessTable.o to create a shared object ProjectTable.so.  This all
appears to work correctly until I do a make test and get the following:

/usr/libexec/ld.so: Undefined symbol "_kvm_open" called from
perl:/home/jtr2/dev/misc/Proc-ProcessTable-0.31/blib/arch/auto/Proc/ProcessTable/ProcessTable.so
at 0x401b311c

I suspect the makefile generated by the Make Maker module is missing some
linker flags or something like that, but I am way out on a limb here trying to
learn as I go.

Can anyone offer advice on how to resolve this, where to look, etc?  I have
been through the man pages for kvm, kvm_open, ld, ldconfig, and others that I
can't remember just now...  Any help would be greatly appreciated.

Thanks in advance,
Jim