Re: svr4, again

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Wed, Dec 19, 2018 at 05:32:47PM +0100, Maxime Villard wrote:
> Le 19/12/2018 ?? 13:46, Maxime Villard a ??crit :
> > Le 18/12/2018 ?? 21:38, Christos Zoulas a ??crit :
> > > In article <CAMnsW54J8y8j2E7c=LxU0MKLzeB5xpuYfSZdO0ooTaRg8K+iog%mail.gmail.com@localhost>,
> > > Jarom????r Dole?? ek  <jaromir.dolecek%gmail.com@localhost> wrote:
> > > > Le mar. 18 d????c. 2018 ??  13:16, Maxime Villard <max%m00nbsd.net@localhost> a ????crit :
> > > > > It is clear that COMPAT_SVR4 is completely buggy, but to be clear on the
> > > > > use of the code:
> > > > 
> > > > +1 to removal for COMPAT_SVR4, there is always attic.
> > > > 
> > > > I remember I've been also doing some mechanical changes in the area in
> > > > past, and also encountered things which were broken just by casual
> > > > browsing. Which I did not fix because I did not have "srv4" binary I
> > > > would need to run. It's simply not useful any more.
> > > 
> > > Just remove it already :-) If we want it back we can resurrect it.
> > > 
> > > christos
> > 
> > so, I will remove
> 
> Done.
> 
> While I'm at it, there was a conversation about compat_ibcs2 [1]. See
> the thread, basically it is a compat for SVR3 on Vax. It seems that no
> one knew exactly what was the purpose of it.

It's misnamed ("IBCS2" stands for "Intel Binary Compatibility Standard"
and is a vestige of various early 286/386 System V ports not quite having
ABI compatibility).  It is really the SVR3 compatibility code, period.

This has some value.  Beyond its original purpose of running System V
binaries on x86, without it I think we may lose the ability to run
native-OS binaries for several platforms where the hardware vendors
added some System V syscalls to BSD kernels.  I'd tread carefully here.

-- 
 Thor Lancelot Simon	                                     tls%panix.com@localhost
  "Whether or not there's hope for change is not the question.  If you
   want to be a free person, you don't stand up for human rights because
   it will work, but because it is right."	--Andrei Sakharov