Lou,
> This affects builds of modules: oid2name, pgbench, vacuumlo
> PQconnectionNeedsPassword oid2name.o
> PQconnectionNeedsPassword pgbench.o
> PQconnectionNeedsPassword vacuumlo.o
>
> With removal of the corresponding references in contrib/Makefile, all
> other modules build AOK.
Can you give us full platform information?
--Josh Berkus