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Run-anywhere scripting masochism of the day: I'm probably about to install an actual Unix SVR4 VM to find out just how well (or likely badly) my "works in modern posix tools" awk, m4, make, & sh scripts run in a real legacy Unix.
Wait, *Dell* had a Unix??? https://winworldpc.com/product/dell-unix/40
Answer: Not at all, at least not from the WinWorld archive. It turns out 'ed' is an optional package, and neither 'm4' nor 'make' are in the floppy set at all. I need either a SVR4 version other than AT&T 2.1 or a later Unix.