With kde@ hat on, but only nit-picking on language in comments. I think Gleb's question in the PR is relevant, though: what does this do-or-simplify that BUILD_DEPENDS does not?

I'm away for a week so will be unable to comment for a bit. If it passes your testing, do go ahead with my blessing.

input-event-codes.h hasn't changedu pstream in 4 years (perhaps "of course" because it's a tagged release) but if wulf@ says that that one should be obtained upstream, then that seems reasonable. There's no meaningful difference between the base-system-provided version and upstream that I can see -- it's all defines of constants. One concern I have is that we stopped using base-system headers at some point -- at least that's how I remember it -- because the dev/evdev/ headers were not meant for user-space consumption. I can't find that in ports commit history, though, so maybe I'm dreaming it.

Retroactive approval, thanks jrm@