Upgrading to 6.2 stable - failed to compile kernel

[FreeBSD Noob]

On Tue, 26 Sep 2006 10:38:43 -0700, "Kevin Oberman" <oberman at es.net>
wrote:

[...]
>> >About the only thing you should put in make.conf is the name of your
>> >kernel config file:
>> >KERNCONF=MY_SYS would cause the config file /sys/i386/conf/MY_SYS to be
>> >used, assuming it's an i386 system. 
>> 
>> OK.  Is that equivalent to declaring it as a make command parameter:
>> | make buildkernel KERNCONF=MY_SYS
>> or do I really need to put it in make.conf?
>
>It's the equivalent. It just allows you to leave it off of the make
>command and i entirely optional. (Note that /etc/make.conf does not even
>exist by default, but will be created if you install Perl.)
[...]
>
>By "in-sync", I mean that world and kernel were either built from the
>same sources or you understand any changes well enough to know that
>there will be no adverse impact. (Unless you are hacking kernel code,
>the second option is null and the sources should be the same.)
>
>If I understand what you did, you now have a 6.1 world and
>6.2-PRERELEASE kernel. This is not likely to work well, I'm afraid. :-(
>
>FWIW, I have an AMD K6 at home and it's pretty painfully slow building
>world or the kernel on that system (and it's 450 MHz). You don't even
>want to think about building Gnome!

Well, buildworld fell over - but was just that I ran out of space on
/usr.  Instead of building world again, I decided to:
| make clean
| make buildkernel KERNCONF=MYKERNEL
| make installkernel KERNCONF=MYKERNEL
That all completed successful.  

I had assumed that:
| make buildkernel KERNCONF=MYKERNEL
was equivalent to:
| config MYKERNEL
| cd ../compile/MYKERNEL
| make cleandepend
| make depend
| make
and would fall over too without building world first, but it seems
not.

Thanks for your help.

Geoff