Instead of using:

pkg install squeak

or building it from ports on FreeBSD 10.1, I tried building it from
source.  It can't find vm-display-x11.so because it doesn't exist.

I went through the usual "config" and "make" procedures, so I'm
wondering what might have happened.

As before, I've got the i386 version of FreeBSD 10.1 installed with
the Mate desktop and Slim login manager.

Does anyone have any ideas?  Thanks.