Fw: GENERIC and DEFAULTS

[dick hoogendijk]

On Wed, 02 Nov 2005 23:27:15 +0100
Philippe PEGON <Philippe.Pegon at crc.u-strasbg.fr> wrote:

> Ken Menzel wrote:
> >>   options INVARIANT_SUPPORT
> >>
> >>   nooptions WITNESS
> >>   nooptions WITNESS_SKIP_SPIN
> > 
> > 
> > If I include GENERIC can I comment out  the following?
> > #cpu            I486_CPU
> > #cpu            I586_CPU
> > 
> > Does this make any difference?  I have always done this out of
> > habit. would it become
> 
> in /usr/src/sys/i386/conf/NOTES we can read :
> 
> #
> # You must specify at least one CPU (the one you intend to run on);
> # deleting the specification for CPUs you don't need to use may make
> # parts of the system run faster.
> #
> cpu             I486_CPU
> cpu             I586_CPU                # aka Pentium(tm)
> cpu             I686_CPU                # aka Pentium Pro(tm)
> 
> 
> > 
> > nocpu I486_CPU   ?
> > 
> > Or is this irrelevant as the build knows what CPU I have?
> 
> if the description is true, it's relevant ;)

Sure, but I think it's the *syntax* that matters here?
options -> nooptions / i486_cpu -> no???
It's OK to leave GENERIC alone, but HOW are things switched off?

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