There is also my own 'minifs' https://github.com/buserror/minifs https://github.com/buserror/minifs ; it's targeted at embedded, but it works fine on x86s too.

There is also my own 'minifs' https://github.com/buserror/minifs https://github.com/buserror/minifs ; it's targeted at embedded, but it works fine on x86s too. Haven't ported it to musl yet (mostly due to the fact that musl wasn't yet merged into crosstool-NG) but that's high on my list. One thing minifs does is that it has a 'cross linker' took that jettisons every piece of code/library that is not actively linked by executable; also, instead of installing everyone's crap everywhere, I build the distro the other way around, and 'pick and chose' the bits that packages need until they work.