In file included from src/shapes/ply.cpp:24:
src/shapes/ply/ply_parser.hpp:35:10: fatal error: 'boost/tr1/functional.hpp' file not found
1 error generated.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222111 includes a ply patch (but for tr1 rather than boost). As for the other bug, updating to the current upstream which uses C++11 might be the best option.
This port is scheduled for deletion after 2018-03-19 per ports r462210.
Expired port removed, still available in 2018Q3