[rescue] SunOS 4

[silcreval]

The mad thing is I actually started on SunOS 4, but somehow switched to Solaris in the 90s and forgot how good the earlier versions were.

I'm now trying to track down some software for SunOS 4, starting with gcc so at least I can compile up some tools. IIRC it wasn't possible to compile gcc 2.95 for SunOS 4 for some reason, so I might try for 2.7 as I definitely remember using that at one time.

- Ian