PostGIS / libproj Issues

[Abram Gillespie]

I'm getting an error when installing PostGIS.  Note that "ls
/opt/local/lib/*proj*" gives me this:

/opt/local/lib/libproj.0.5.5.dylib	/opt/local/lib/libproj.dylib
/opt/local/lib/libproj.0.dylib		/opt/local/lib/libproj.la
/opt/local/lib/libproj.a

The error is:
configure: error: could not find libproj - you may need to specify the
directory of a PROJ.4 installation using --with-projdir

Thanks.
-Abe
OS X Leopard / 10.6.1