Well, the last SuS/POSIX came out in 2008. It's 2021.
It should come as no surprise that since Linux has become the defacto POSIX standard that no other OS could keep up (or would want to really).
It should come as no surprise that since Linux has become the defacto POSIX standard that no other OS could keep up (or would want to really).
As for Linux' standards compliance, I am aware.