[pups] gcc-.3.4.6 for pdp11

[Ian King]

Bill Cunningham wrote:

>    Does anyone know how to compile gcc-3.4.6 for the pdp11? I use
>the --target=pdp11 switch and the compiler runs for awhile then breaks. The
>output says it's bulding for a pdp11-unknown something so there maybe
>something I'm not using.
>
>  
>
[snip]

And there's another issue: *which* PDP11?  I have a MINC-11 that was 
upgraded with an 11/23 CPU, as many were.  I managed to get my hands on 
the original MINC software, and it would not run.  It's been a while 
since I did that so I don't remember the exact instruction on which it 
choked (with an illegal instruction trap).  But I dropped in an 11/03 
CPU and all ran fine.  I found a helpful matrix in one of the DEC 
handbooks that outlines just which instructions were changed between 
several of the Qbus processors, anyway. 

Imagine the number of compiler switches....  -- Ian