Date: Thu, 13 Sep 2001 09:10:43 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Warner Losh <imp@harmony.village.org> Cc: Marcel Moolenaar <marcel@xcllnt.net>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: hw.machine vs hw.machine_arch (was: Re: cvs commit: src/sbin/reboot Makefile) Message-ID: <20010913091043.C10963@sunbay.com> In-Reply-To: <200109122218.f8CMIst43283@harmony.village.org>; from imp@harmony.village.org on Wed, Sep 12, 2001 at 04:18:54PM -0600 References: <200109122216.f8CMGLt43250@harmony.village.org> <20010912134640.A639@dhcp01.pn.xcllnt.net> <200109121221.f8CCL9q93334@freefall.freebsd.org> <200109122216.f8CMGLt43250@harmony.village.org> <200109122218.f8CMIst43283@harmony.village.org>
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On Wed, Sep 12, 2001 at 04:18:54PM -0600, Warner Losh wrote:
> In message <200109122216.f8CMGLt43250@harmony.village.org> Warner Losh writes:
> : : > Use ${MACHINE}, it works with cross-builds.
> : :
> : : More specifically, ${MACHINE} can be pc98 while ${MACHINE_ARCH}
> : : is i386. In userland you want to test for i386; not pc98.
> :
> : uname -m is the ${MACHINE_ARCH}, so that should be used instead.
> : Marcel is right.
>
> I just confirmed on my pc98 machine. arch -m is "i386" on pc98.
>
Hmm, I always thought that hw.machine_arch should be what the
${MACHINE_ARCH} is set to during `buildworld', and hw.machine
should be what the ${MACHINE} is. And we know that the only
exotic combination currently is i386/pc98. Well, well...
`uname -m' fetches the value of:
if (flags & MFLAG) {
mib[0] = CTL_HW;
mib[1] = HW_MACHINE;
...
Not the HW_MACHINE_ARCH.
But then in sys/i386/i386/identcpu.c (which is also in files.pc98)
we have:
char machine[] = "i386";
SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
machine, 0, "Machine class");
I wonder, should that be "pc98" for PC98's. Anyone cares to explain
why it is "i386" on PC98, and why then we have both hw.machine and
hw.machine_arch?
Thanks,
--
Ruslan Ermilov Oracle Developer/DBA,
ru@sunbay.com Sunbay Software AG,
ru@FreeBSD.org FreeBSD committer,
+380.652.512.251 Simferopol, Ukraine
http://www.FreeBSD.org The Power To Serve
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