Exactly -- remember Dennis and Brian wrote K&R in 1978 on V6, not PWB and not V7 (or anything from Summit like TS).  When Brian's typesetter independent troff was released, that updated language was needed.   That was what we referred to as "typesetter C".  Brian and Dennis would have put together that kit.   My >>guess<< is that Mashey et al. and the Summit folks forked Dennis compiler somewhere before this time -- so what got packaged with the typesetter kit vs what got packed with Mashey and the team's kit are close but >>slightly<< different.

ᐧ

On Sun, Dec 1, 2024 at 10:49 AM Ron Natalie <ron@ronnatalie.com> wrote:

Agreed, the typesetter C ran on a virgin V6 system.   That was the whole
point.   It came out before most of us got real V7s.



------ Original Message ------
From "Noel Chiappa" <jnc@mercury.lcs.mit.edu>
To tuhs@tuhs.org
Cc jnc@mercury.lcs.mit.edu
Date 11/30/2024 11:21:31 PM
Subject [TUHS] Re: Typesetter C Compiler and Troff (Re: Re: v6 Unix
Documents)

>     > From:
>
>     > I was able to rebuild both the UNSW and the native PWB compiler on PWB
>     > 1.0, but not to backport either to vanilla v6.
>
>Any idea what the problem was? I'm curious, because we ran a version of the
>Typesetter compiler on the MIT systems, which ran an enhanced V6.
>
>          Noel
>