Interesting. Void is missing, not just void*? At one point void worked but the void * idiom was buggy/missing    

The problem I have is the compiler was changing in small ways with each version and the differences run together 


Sent from my PDP-7 Running UNIX V0 expect things to be almost but not quite. 

> On Aug 23, 2018, at 9:58 PM, Dan Cross <crossd@gmail.com> wrote:
> 
>> On Thu, Aug 23, 2018 at 6:17 PM <ron@ronnatalie.com> wrote:
>> [snip]
>> 
>> Void* came out with the V7 compiler, if I recall properly.   The BSD kernel
>> looks as if it requires such a later compiler (it uses bit fields which the
>> earlier compilers didn't support).
>> But it doesn't matter.   You are right char* (or caddr_t) would work just
>> fine for this albeit with some explicit casting.
> 
> This appears to be incorrect, unfortunately. I just tested on the PDP-11/70 running 7th Edition at the Living Computer Museum (I've got an account there) and it appears that neither `cc` nor `pcc` understand `void`.
> 
> Perhaps Steve Johnson can chime in on this? I suspect he'd know the history here well.
> 
>         - Dan C.
>