Will Ultrix 1.2 or 2.2 binaries run under 3.0/3.1?

[Brain in Neutral]

Do any binaries from Ultrix 1.2 or 2.2 run under Ultrix 3.0 or 3.1?
I presume that anything that uses syslog(), for instance, won't, since
Ultrix is now using the 4.3BSD struct hostent, but will "plain vanilla"
things still work?

Or, perhaps another way of putting it:  if some binaries will run, what things
cause a given binary not to run?

Paul DuBois
dubois at primate.wisc.edu