fails with make problems.
Setting MAKE environment variable to gmake helps, but R port should do this automatically on FreeBSD to prevent user confusion.
gmake should also be added to RUN_DEPENDS.
A commit references this bug:
Date: Wed Jun 28 19:11:32 UTC 2017
New revision: 444603
math/R: Build with gmake and add devel/gmake to RUN_DEPENDS because some
internal packages use GNU make. While here, sort ONLY_FOR_ARCHS value to
silence portlint warning.
Reported by: email@example.com
I've switched the build to use gmake and added a run-time dependency on devel/gmake. I'll wait a bit for you to confirm everything is working. If it is, please close the bug report.