Re: Not exporting MACHINE and MACHINE_ARCH from <machine/param.h>

[Alan Barrett <apb%cequrux.com@localhost>]

On Mon, 16 Sep 2013, Matt Thomas wrote:
> Currently we export MACHINE and MACHINE_ARCH from 
> <machine/param.h> which is included from <sys/param.h>.
>
> I think we shouldn't relay on those and should instead rely on 
> sysctl (directly or indirectly [uname]) to fetch hw.machine or 
> hw.machine_arch, respectively.

I agree that userland should use a run-time value, not 
a compile-time value, for the equivalent of MACHINE and 
MACHINE_ARCH.

struct utsname, as returned by uname(3), includes "machine" but 
not "machine_arch".  Perhaps it's time to extend uname(3) to be 
able to return everything that uname(1) can print.

--apb (Alan Barrett)