PgConnection

I have just installed PostgreSQL, and the installation took place with no
problems/errors.

I've read the documentation about using the C++ interface to Postgres, but I
seem to be havin trouble getting anything to compile.  Following the example
included with the distribution, I have done something similar to this:

#include <iostream.h>
#include <libpq++.h>

void main() {
  PgDatabase data ("foo");

yadayadayada
}

Whenever I do this, I get a compile error stating that there is an undefined
reference to PgConnection.  Has anyone had a similar situation, or know how
to remedy this?

Thanks,
-Jason