make "quickworld"? (like in DragonFly)

[Geert Hendrickx]

On Wed, Aug 11, 2004 at 02:47:14PM +0200, Simon L. Nielsen wrote:
> On 2004.08.11 00:36:06 +0200, Geert Hendrickx wrote:
> > Hi, 
> > 
> > is there any way (or could it be implemented) to rebuild only the
> > changes in world and kernel sources after a cvsup?  DragonFly BSD
> > features "make quickworld" and "make quickkernel" which does exactly
> > that.  
> 
> You can do that already:
> 
> make buildworld buildkernel -DNOCLEAN

Does adding "NOCLEAN=true" to /etc/make.conf have the same effect?  

GH