> There's a pkgsrc for the suse Linux distribution on x86.  

Yes, that package has a problem: it uses binaries, and depending on the
CPU (i386, m68k, and maybe ppc in the future), we should download
different files. Currently, it works only for i386. It would make sense
to download the i386 Linux libs, the m68k Linux libs or the ppc Linux
libs, depending on the CPU. Anyway, this is not the biggest problem yet.
What should be done now (and that's what I'd like to get info about) is
kernel support for Linux compat for ppc. 

> You could also grep for COMPAT_LINUX (or whatever the config option is) in
> the kernel source tree.

All CPU dependent stuff seems to be here: /sys/compat/linux/arch/powerpc
In that directory, we have the following files
Makefile        linux_mmap.h    syscalls.conf

In /sys/compat/linux/arch/m68k, we have:
linux_machdep.h           linux_syscallargs.h
Makefile                  linux_mmap.h              linux_syscalls.c
files.linux_m68k          linux_sig_machdep.S       linux_sysent.c
linux_errno.h             linux_sigarray.c          linux_termios.h
linux_exec.h              linux_siginfo.h           linux_types.h
linux_fcntl.h             linux_signal.h            syscalls.conf
linux_ioctl.h             linux_socket.h            syscalls.master
linux_machdep.c           linux_syscall.h

And /sys/compat/linux/arch/i386 has nearly the same stuff (But without
an assemble language file)

I assume that in order to create the macppc linux compat, we'll need to
create files similar for the powerpc directory. Therefore, I'm looking
for some information about theses files: what are they for exactly? How
do I know what file I need to reproduce? All? And for example, what is
CPU dependant in linux_sigarray.c? This file is exactly the same (except
for the CVS tag) for i386 and m68k...

-- 
Emmanuel Dreyfus
p99dreyf@criens.u-psud.fr