cross platform building under emulation

[Dan Langille]

On 13 Oct 2005 at 17:11, Brooks Davis wrote:

> On Thu, Oct 13, 2005 at 08:02:59PM -0400, Dan Langille wrote:
> > My usual practice when building world is to do it once on the fastest 
> > box I have, then do installs via NFS mounts.  I need to do this for 
> > FreeBSD 4.*, 5.*, 6.*, and -current.  My goal is to do all this with 
> > just one box.  At first I thought of multi-booting the box.
> > 
> > Tonight at the OCUUG meeting <http://www.ocuug.on.ca>, someone 
> > mentioned doing this with emulation.  After hearing that, multi-
> > booting doesn't sound as good.
> > 
> > The box in question is an AMD 64 3000+ with 1GB of RAM.  The m/b is a 
> > KV8E Deluxe, which gives me the option of onboard RAID-1 SATA.
> > 
> > What do you think of this idea?  What tools would you suggest?
> > 
> > The host enviroment will also be used as my main database server 
> > running FreeBSD 6, most likely in AMD mode.
> 
> It should work, but might be a bit slow.
> 
> You could also consider using Kris's trick of running older userlands in
> chroots on -current (or 6.x in your case) kernels like he does on the
> ports cluster.  I think his BSDCan paper has the details on the bits you
> need to replace to deal with kernel incompatabilities.  The nice that is
> that you don't have any emulation in the way.  I think Peter Wemm said
> they were also doing i386 chroots on amd64 kernels at Yahoo! so that may
> deal with that issue.  At least until 7.0 comes you should be able to do
> -current buildworld and buildkernel on 6.x machines so that won't be a
> problem (if it is, scream since breaking that is bad :).

Gidday Brooks..  What about jails?
-- 
Dan Langille : http://www.langille.org/
BSDCan - The Technical BSD Conference - http://www.bsdcan.org/