config(8) should check if a scheduler is selected

[Bruce Evans]

On Fri, 18 Apr 2003, Kris Kennaway wrote:

> On Fri, Apr 18, 2003 at 04:47:43PM -0400, David Magda wrote:
>
> > If you run config(8) on a kernel configuration file which doesn't
> > have a scheduler selected then it does *NOT* complain.
>
> How is this different to any of the other mandatory kernel components
> or dependencies?  You can build a kernel that will refuse to link in
> many ways; missing a scheduler is just a new mistake you might make if
> you forget to read /usr/src/UPDATING.

It is the only mandatory option (sic).  Kernels with no options (although
they might not be useful) can be built except for this bug.  Example of
a minimal config file (before misconfiguration of the configuration of
scheduling).

%%%
machine		i386
cpu		I686_CPU
ident		MIN
%%%

BTW, a minimal kernel is now almost 3 times as large as in FreeBSD-2 due
to general bloat and misconfiguration of configuration in the opposite
way (subsystems much larger than scheduling are standard; you can still
leave out FFS and INET but many less useful subsystems are standard).

Bruce