Compiling 09.00.0300 on OS X Snow Leopard

I'm trying to use psqlODBC on OS X 10.6. I compiled from source
with configure arguments

--with-iodbc --with-libpq=/opt/local/lib/postgresql90

I installed PG9 via MacPorts.

Using the iODBC driver test script gives me the errors:

1: SQLDriverConnect = [iODBC][Driver
Manager]dlopen(/usr/local/lib/psqlodbcw.so, 6): no suitable image found.
Did find:
/usr/local/lib/psqlodbcw.so: mach-o, but wrong architecture (0)
SQLSTATE=00000
2: SQLDriverConnect = [iODBC][Driver Manager]Specified driver could not be
loaded (0) SQLSTATE=IM003

The Makefile appears to have correctly determined my architecture
(x86_64-apple-darwin10.8.0).

Any sugestions? Is there a better way to get the ODBC driver for OS X? It
didn't appear to be included with any of the various packages in MacPorts.

-B