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From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: net.lang.c
Subject: Re: How to do it ?
Message-ID: <7306@utzoo.UUCP>
Date: Sun, 9-Nov-86 05:08:21 EST
Article-I.D.: utzoo.7306
Posted: Sun Nov  9 05:08:21 1986
Date-Received: Sun, 9-Nov-86 05:08:21 EST
Organization: U of Toronto Zoology
Lines: 28

> I would like to know if someone has used (or heard about the use of) high
> level languages (C, Pascal, Ada, ..) or tools to generate PDP-11 code. 
> I think there could be various ways to do it, including :
> - a cross-compiler running on VAX/VMS or PDP/RSX ...

Have you considered a native compiler running on PDP11 Unix?  Since that's
what my system is, and how all C on it is compiled, I can guarantee it
works.  It's a much more pleasant working environment than VMS or RSX, too...

If you don't want to buy a Unix-capable PDP11 just for this job (an attitude
I can understand, since in other respects it's not a good choice for a Unix
machine any more), I believe the compiler and such should run without much
trouble in compatibility mode under 4BSD.  The compiler might run in native
mode, in fact, although I would wonder about 16-bit assumptions it might
make.  The assembler was written in assembler, so unless you can find a
more modern version (I know of one, but it's not widely available), you
will need compatibility mode for that.

> ...of course a compiler with a run-time library would not work in
> this case because the "system" is some specialized processor based on a
> PDP-11 chip...

We used to routinely compile code to be downloaded to a smaller, non-Unix,
PDP11.  This required a different C library (or great care in using the
standard one) plus a different runtime-startup routine, but it worked fine.
-- 
				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,decvax,pyramid}!utzoo!henry