New comment by gronka on void-packages repository

https://github.com/void-linux/void-packages/issues/30508#issuecomment-893813540

Comment:
> Re. how to build a kernel, just edit the config in `srcpkgs/linux5.12/files/x86_64-dotconfig`, `./xbps-src pkg -f linux5.12` and `xi -f linux5.12`

1) When I try this, the changes do not propagate to `/proc/config.gz`. Sorry for being a noob - I think it's reinstalling 5.13 from the repos instead of from the local folder

2) How do I use multiple cores to compile?

3) It seems like we only need these 2 flags if someone else wants to do it:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1925730