I finally got it running.  I configured my computer with FreeBSD 10.1
(64-bit version) using Mate as the desktop and Slim as the login
manager.

I installed it directly from the repository using:

pkg install squeak

and it starts up almost instantly.  It never occurred to me that
everything has to be 64 bits as there's no indication on the FreeBSD
ports web page that it's required.

Thank you to everyone for their advice.  It took longer than I
expected to get Squeak running, and I tried a number of things that
didn't work, I learned a lot from this, including things like how to
compile from source code.