Created attachment 174338 [details]
Attached patch simplifies the Makefile by using OPTIONS helpers; it requires a sub change in the plist as well. It also includes a maintainership change if you want. portlint notes a couple issues with the port but I didn't fix those just to simplify the patch.
A commit references this bug:
Date: Sat Sep 17 15:58:50 UTC 2016
New revision: 422332
Complete the adoption of options helpers, remove old cruft,
and take maintainership.
Approved by: maintainer timeout
Committed after timeout, including maintainership change.