> Linux-compatible ABI
There's no specification of that ABI, much less a compliance test suite. How complete is this compatibility?
While developing the lx brand on illumos/SmartOS, ltp was helpful. It may not be complete, but it is a pretty good start.
Here is a list of implemented syscalls, but of course each checked one could still be slightly incompatible:
https://asterinas.github.io/book/kernel/linux-compatibility....
There's also tons of ioctls and /proc and what not.