There's a closed pull request on the void-packages repository

kmscon: patch build, add service files
https://github.com/void-linux/void-packages/pull/21452

Description:
- Simple patch, required an #include in one of the files.
- Created a service for kmscon, by default on TTY2.
- Fix xlint errors.

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@q66 I know you said you'd like to remove the package. but I had already written the whole thing :p 

So this PR is for making a decision too:

- Keep the package, so make it better supported: patch so it can actually build, plus a service to make it usable.
- Remove the package, and be done with it.