On Thu, 26 Mar 1998, Ken Nakata wrote:

> On Thu, 26 Mar 1998 09:23:54 -0500,
> "Justin R. Smith" <jsmith@mcs.drexel.edu> wrote:
> > The subject line says it all. I'd like to play with building
> > kernels without having to build all the rest of the system.
> > If it's possible, how much disk space is needed?
> 
> Yes, it is possible.  All you need to update when building a kernel
> are /usr/src/sys, /usr/src/usr.bin/config, and /usr/src/usr.bin/make.
> The last two are not always but it's a good idea to update these when
> you get a compile error or two while building a kernel.

Just to add another data point, it is real easy. I was compiling just
kernels for almost two years before I got a beefy-enough system to compile
everything else.

The config and make source are only needed if you're following -current.
If you're doing that, you're also probably going to use the sup program to
get source updates. It will also get you the latest source for config and
make. :-)

Take care,

Bill