AT&T UNIX History
G.R.Tomasevich
grt at twitch.UUCP
Wed Jun 18 23:09:52 AEST 1986
> 1, 2, and 4. USG System 4 did not have enough functionality
> beyond that available in USG System 3/III to justify a
> separate external release.
> Adam Reed
It also apparently was not maintained consistently over processors. We had
4.2 (not to be confused with 4.2BSD) on both a VAX-11/750 and PDP-11/45.
The VAX version of the C compiler was closer to the 5.0 in strictness of error
messages, such as using += in place of =+, and in conversions between pointers
and other types, while the PDP version seemed identical, or nearly so, to the
3.? version. Because of that, lots of programs broke when I ported them.
--
George Tomasevich, ihnp4!twitch!grt
AT&T Bell Laboratories, Holmdel, NJ
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