freebsd stable - Nov 2005 - Fw: GENERIC and DEFAULTS

>   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

nocpu I486_CPU   ?

Or is this irrelevant as the build knows what CPU I have?

Thanks,
Ken

On Wed, Nov 02, 2005 at 04:39:30PM -0500, Ken Menzel
wrote:
> ...
> If I include GENERIC can I comment out  the following?
> #cpu            I486_CPU
> #cpu            I586_CPU
Well, it's your (copy of) the file; I suppose you can do whatever you
want to with it.  :-)
 
> Does this make any difference?  I have always done this out of habit. 
I believe it will make some difference, yes.
> would it become
> 
> nocpu I486_CPU   ?
As of FreeeBSD 6.0-STABLE, /usr/src/usr.sbin/config/lang.l (rev. 1.41,
last updated 2005/02/10 10:46:27) has tokens defined such as "cpu",
"device", "nodevice", etc., but not "nocpu". 

It might be worth adding, though.  Of course, some semantics would need
to be associated with it in config.y.
> Or is this irrelevant as the build knows what CPU I have?
It might know what kind you havem but that's no guarantee that you plan
to run the kernel you build on the same machine.

Peace,
david
-- 
David H. Wolfskill				david@catwhisker.org
Prediction is difficult, especially if it involves the future. -- Niels Bohr

See http://www.catwhisker.org/~david/publickey.gpg for public key.

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 ;)
> 
> Thanks,
> Ken
--
Philippe PEGON