As brooks@ pointed out recently, the list of ports under ‘This ports is required by’ includes deleted ports. Brooks is trying to kill off devel/llvm and lang/clang in their current form. However, devel/llvm shows that lang/copper and lang/ldc-devel depend on it, but those two ports have been deleted.
This should be rather straight foreword. I’ll work on it as soon as I can. I think a * at the end of the port name should suffice.