24 Apr
2006
24 Apr
'06
10:06 p.m.
On 24-Apr-06, at 9:05 AM, Wesley Parish wrote:
Quoting Andrzej Popielewicz <vasco(a)icpnet.pl>:
It can't be done.
As others point out, the program is many times (100x or more?) too
big -- likely even gcc 1.x is far too big, but gcc {2,3,4}.x are all
meant for large 32-bit systems.
However, cross-compilation can certainly be easily done. I have made
a PDP-11 back-end for lcc[1] (not quite complete but shows that it
can be done), which is an ANSI (c89) compiler[2]. lcc is a much
smaller and simpler compiler than gcc, but its executables are still
massively outsize for PDP-11 systems.
--Toby
[1] http://www.telegraphics.com.au/sw/info/lcc-pdp11.html
[2] http://www.cs.princeton.edu/software/lcc/
Wesley Parish napisał(a):
In that case, all I can suggest is that the gcc source files are
cross-compiled to pdp11, and error messages noted. Then the files get
rewritten for the pdp11 ... I'm sorry I can't help - I'm neither a
gcc guru
nor a pdp11 guru. djggp relies on a DOS extender to run its 32-bit
programs in a 16-
bit
operating environment on a 32-bit machine. go32 is Delorie's own DOS
extender
- OpenWatcom offers at least two other DOS
extenders to pull the
same
kind of
trick.
I know that, because I have used djgpp for a quite lot of time.
I thought , that Bill wanted to "scale down" gcc compiler to 16 bit
environment, and probably djgpp could be a good starting point.
I understand , that gcc is not "directly" portable.But because gcc
can
create pdp code in cross compile environment, perhaps it is not
impossible .
BTW I have just ported Bob Supnik pdp11 emulator to Coherent
4.2.10 and
it seems to work(compile works etc). Coherent being 32 bit for 386
processors has nonetheless 286 support builtin in kernel, so it
seems to
be good environment for this simulator (?).
That's good news!
I have the same problem as Bill, I have to kill
pdp11 process on
another
console to exit.
You're not the only one, either.
Wesley Parish
Andrzej
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