[TUHS] Re: Typesetter C Compiler and Troff (Re: Re: v6 Unix Documents)

[Dan Plassche <boomer3200@gmail.com>]

> Date: Sun, 20 Oct 2024 22:47:43
> From: Jonathan Gray <jsg@jsg.id.au>
> 
> 
> I adapted Tim Newsham's v6 install scripts for PWB if you'd
> like to run it on simh.
> 
> https://github.com/jonathangray/pwb/

Thanks, very helpful and worked well.  Since I was able to 
follow the setup script and rebuild the c versions of nroff/troff 
on PWB 1.0, I took a look at the new c compiler for differences 
with the UNSW copy.

It turns out that the UNSW copy of the c compiler was definitely 
a earlier version than in PWB.  The most noticeable difference in 
the UNSW stdio library was calloc.c not using malloc.  The most 
major omission in the c compiler was casts and there were also 
some local changes to cc.c.  Based on those differences, I'm 
thinking that the UNSW copy appears to be from late 1976 to early 
1977.

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.


Best,

Dan