I finally got xpdf to compile without openmotif, (see the unanswered request from 17 June 2005). One nice feature of the ports is that if lesstif is already installed, it won't install openmotif. With xpdf, If I set USE_MOTIF to no, and then compile xpdf *after* having installed lesstif this will work, (I thought I tried this before, but it seems to work now).
There's no FLAVOR for using lesstif instead of motif. Should there be, or is there a better way that I should be going about this, for which I've overlooked?