Running Ultrix 4.x binaries on a 3.x system (was: SunOS vs Ultrix)

[Jeffrey Mogul]

In article <73750 at bu.edu.bu.edu> eap at bu-pub.bu.edu (Eric A Pearce) writes:
>	Under Ultrix (and "static" Sun) I would take up more disk
>space, but my executable stands a fair chance of working under
>Ultrix 3.1, 4.0 or 4.1.   I did run into trouble with 3.1 executables
>under 4.0, as it looks like the hostname lookup routines changed 
>enough to break them.

Useful trick: copy /etc/svc.conf from one of your 4.x machines to
all of your 3.x machines (or pack it along with the binaries you
ship).  The 3.x programs don't care about, and many programs compiled
with the 4.x libraries will run quite happily if the file is there.

-Jeff