Remaining host configuration fragments

[Joe Buck]

> On Tue, Jan 15, 2002 at 11:05:17PM -0800, Mark Mitchell wrote:
> > 
> > In some cases, we are still trying to support systems with GCC that
> > the operating system vendors stopped supporting years ago.  To me,
> > this is not an optimal use of scarce resources.
> > 
> > I don't have any good bright-line criteria for making that decision,
> > though.

Zack writes:
> Some candidates for dropping:
> 
> Architectures which don't support ELF.
> Architectures which were never updated to new varargs.
> All configurations based on SVR3 or earlier.
> All configurations based on 4.3BSD or earlier.
> All configurations based on COFF.

These criteria are way too severe, IMHO.

> It is not easy to enumerate these.  For the first one, I have a list:
> 
>   1750a  c4x      convex   elxsi  ns32k  romp  we32k
>   a29k   clipper  dsp16xx  i960   pdp11  vax
> 
> (vax is actively maintained, so it could be an exception.)

c4x is being actively maintained; I see that Michael Hayes has
made some fixes in the last seven days.  Similarly dsp16xx seems
to be getting maintainance.  Both are DSP targets for chips that
are still in wide use.

On the other hand, I seem to recall that the world's last elxsi was
turned off some time ago.