From mboxrd@z Thu Jan  1 00:00:00 1970
From: cubexyz@gmail.com (Mark Longridge)
Date: Thu, 17 Jul 2014 01:28:23 -0400
Subject: [TUHS] Program compiled on unix v6 works on unix v5
Message-ID: <CADxT5N6nnxYQq32o+06e1scGgR5Y_rHs0d1e2=Vf7M0+-TU1Jw@mail.gmail.com>

Ok, this is cheating a bit but I was wondering if I could possibly
compile my unix v6 version of unirubik which has working file IO and
run it under unix v5.

At first I couldn't figure out how to send a binary from unix v6 to
unix v5 but I did some experimenting and found:

tp m1r unirubik

which would output unirubik to mag tape #1 and

tp m1x unirubik

which would input unirubik from mag tape #1.

I don't know what cc does exactly but I thought "well if it compiles
to PDP-11 machine code and it's statically linked it could work". And
it actually does work!

I still want to try to get unirubik to compile under Unix v5 cc but
it's interesting that a program that uses iolib functions can work
under unix v5.

Mark