kernel build error

Robert Watson rwatson at FreeBSD.ORG
Thu Aug 5 06:18:54 PDT 2004

On Thu, 5 Aug 2004, Mark Murray wrote:

> Robert Watson writes:
> > 
> > On Wed, 4 Aug 2004, Robert Watson wrote:
> > 
> > > The problem appears to be that 'mem_range_softc' is defined in
> > > mp_machdep.c, which means you can't build a non-SMP i386 kernel because
> > > the symbol is undefined.  We probably need to move the declaration to
> > > machdep.c or the like. 
> > 
> > I've committed this change and things now appear to build.  Might take a
> > couple of minutes to propagate to cvsup, etc.
> Thanks Robert. Colour me very confused. :-) 
> I built 4 cases in testing; SMP/UP cross Module/NoModule. All worked. 
> What did I miss? 

I'm not sure what the UP above refers to, but the case I bumped into was
building a GENERIC kernel with "options SMP" and "device apic" removed
from the configuration file.  The kernel failed to link due to the missing
softc symbol from mp_machdep.c, which is only compiled into kernels with
"options SMP".  I've not yet caught up on e-mail, so I've not yet seen if
you've seen, but I sent a follow-up message in which I observe the same
problem in non-i386 trees, which will also need to be fixed. 

For benchmarking purposes, I build UP kernels without "options SMP" or
"device apic" for performance reasons.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert at      Principal Research Scientist, McAfee Research

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