Subject: Re: SCO Compatibility
To: D'Arcy J.M. Cain <>
From: Scott Bartram <>
List: current-users
Date: 01/15/1998 23:25:41
It's been awhile... let me see if I can remember...

1) You don't need EXEC_ELF32 for COFF binaries.

2) As far as /emul goes, you don't need anything in there to run static,
non-X binaries.

3) If the binary uses shared libs, then you will need /emul/ibcs2/shlib to
be populated with the required shared libs. 

4) If you are running an X binary, you need to run 
"touch /emul/ibcs2/dev/socksys" (yes, its a kludge).

5) X programs can't use local sockets (actually STREAMS pipes on SCO) so
you need to set DISPLAY to localhost:0.0 instead of :0.0.

That's about it I think. Let me know if this helps.

Scott Bartram

On Thu, 15 Jan 1998, D'Arcy J.M. Cain wrote:

> Thus spake Frank van der Linden
> > On Thu, Jan 15, 1998 at 02:04:48AM -0500, Mike Long wrote:
> > > Try COMPAT_IBCS2 instead.  If that doesn't work you can also try
> > > removing COMPAT_LINUX, since AFAIK there is still nothing in the
> > > kernel to distinguish properly between Linux and SVR4 Elf
> > > executables.
> > 
> > That was only true for *statically* linked binaries, and should be
> > less of a problem now. A heuristic is applied that checks if
> > the binary is compiled with gcc (true for all Linux binaries, well..
> > you can't be 100% sure but..). Far from perfect, but it's better.
> > If you need to be certain that *statically* linked binaries for
> > COMPAT_SVR4 work (there aren't too many of those around), then
> > it's a good idea to remove COMPAT_LINUX.
> Nope.  I now have a kernel built with the following:
> #options        COMPAT_SVR4 # binary compatibility with SVR4
> options     COMPAT_IBCS2    # binary compatibility with SCO and ISC
> #options        COMPAT_LINUX    # binary compatibility with Linux
> #options        COMPAT_FREEBSD  # binary compatibility with FreeBSD
> # Executable format options
> options     EXEC_ELF32  # 32-bit ELF executables (SVR4, Linux)
> Can the ELF line be messing me up?  How about the emul directory?  What
> do I need in there?  Is there a man page coming?  If someone can help me
> I'll put the man page together.
> -- 
> D'Arcy J.M. Cain <darcy@{druid|vex}.net>   |  Democracy is three wolves
>                |  and a sheep voting on
> +1 416 424 2871     (DoD#0082)    (eNTP)   |  what's for dinner.