>     is that OpenBSD is derived from NetBSD, so I used the OpenBSD
>     settings for when "NetBSD" was recognized.  There were errors,
>     most notably that "GCC did not like a 'pthreads' option".

You'll need to use one of the user-level thread libraries in pkgsrc,
for the moment. devel/ptl2, devel/pth, devel/mit-pthreads,
or devel/unproven-pthreads. I've had more luck with the first two than
the last two, personally.

        - Nathan