Date: Fri, 14 Sep 2001 13:55:41 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Bruce Evans <bde@zeta.org.au> Cc: Warner Losh <imp@harmony.village.org>, Marcel Moolenaar <marcel@xcllnt.net>, KATO Takenori <kato@nendai.nagoya-u.ac.jp>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: hw.machine vs hw.machine_arch Message-ID: <20010914135541.B12915@sunbay.com> In-Reply-To: <20010914201048.W18027-100000@delplex.bde.org>; from bde@zeta.org.au on Fri, Sep 14, 2001 at 08:22:42PM %2B1000 References: <200109140648.f8E6mFt19413@harmony.village.org> <20010914201048.W18027-100000@delplex.bde.org>
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Ahh, thank you very much! That explains why the requirement
to set MACHINE=pc98 is missing in src/Makefile.inc1.
I was in that piece of code recently, and didn't read the
comment carefully.
On Fri, Sep 14, 2001 at 08:22:42PM +1000, Bruce Evans wrote:
> On Fri, 14 Sep 2001, Warner Losh wrote:
>
> > In message <20010913224828.B8717@dhcp01.pn.xcllnt.net> Marcel Moolenaar writes:
> > : I don't have a pc98 to check, but I don't see the evidence in the
> > : code that hw.machine=pc98 on pc98. Please check.
> >
> > These are both i386 on my pc98 machine, but I may have messed up when
> > building the kernel on my FreeBSD/i386 machine.
>
> It's certainly i386. UTSL :-)
>
> > : Also, given the above definition, what remains of the function of
> > : the hw.ispc98 MIB?
> >
> > machdep.ispc98 you mean? That is 0 on my FreeBSD/i386 boxes and 1 on
> > my pc98 machines.
>
> machdep.ispc98 is used mainly to give an unusual setting of ${MACHINE} for
> make(1). From make/main.c:
>
> #if defined(__i386__) && defined(__FreeBSD_version) && \
> __FreeBSD_version > 300003
> /*
> * PC-98 kernel sets the `i386' string to the utsname.machine and
> * it cannot be distinguished from IBM-PC by uname(3). Therefore,
> * we check machine.ispc98 and adjust the machine variable before
> * using usname(3) below.
> * NOTE: machdep.ispc98 was defined on 1998/8/31. At that time,
> * __FreeBSD_version was defined as 300003. So, this check can
> * safely be done with any kernel with version > 300003.
> */
> if (!machine) {
> int ispc98;
> size_t len;
>
> len = sizeof(ispc98);
> if (!sysctlbyname("machdep.ispc98", &ispc98, &len, NULL, 0)) {
> if (ispc98)
> machine = "pc98";
> }
> }
> #endif
>
> Note that this doesn't break cross-building. It is just for convenience,
> so that you don't have to remember to set MACHINE explitly when building
> pc98 userland with a pc98 kernel. But it is just confusing in other
> configurations.
>
> Bruce
--
Ruslan Ermilov Oracle Developer/DBA,
ru@sunbay.com Sunbay Software AG,
ru@FreeBSD.org FreeBSD committer,
+380.652.512.251 Simferopol, Ukraine
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