Ah, yes, we've got an AT&T purist here, eh? I always loved how the AT&T folks would always yell and scream and pout that all the flavors of BSD or Linux or etc were not pure Unix. That code written to run on true AT&T Unix would not necessarily run on any of the derivatives. That you were taking your life into your own hands if you tried using a non-AT&T flavor of Unix.

It took a long time, but eventually that world turned around. Being an AT&T flavor of Unix is no longer important. I can still remember the day when IBM started advertising AIX as being "Linux-compatible".

In short, stuff written to run on one flavor of Unix tends to be pretty easy to get running on other flavors of Unix. It doesn't really matter about the ancestry of the code.