On Thu, Jan 23, 2014 at 11:52 AM, Warren Block <wblock_at_wonkity.com> wrote: > On Thu, 23 Jan 2014, Kevin Oberman wrote: > > On Thu, Jan 23, 2014 at 7:47 AM, Thomas Hoffmann <trh411_at_gmail.com> >> wrote: >> On Thu, Jan 23, 2014 at 9:56 AM, Warren Block <wblock_at_wonkity.com> >> wrote: >> > >> > >> > Using -DNOCLEAN with an existing /usr/obj can go even faster than >> ccache: >> > less than two minutes for a buildworld on my frequently updated >> i5/SSD >> > system, sometimes less than one minute. >> >> >> Can you elaborate on this, please? I always clear my /usr/obj before >> starting a buildworld, which takes 2 hours to run on my system. Are you >> saying if I do "make -DNOCLEAN buildworld" I do not have to clear /usr/obj >> first >> > > Yes. Removing /usr/obj is a faster way of doing 'make clean', mostly. > > > AND my buildworld will run faster >> > > Yes, because make will see that many/most files have already been built. > > (AND with no downside)? >> > > Well... mostly. :) > > I noticed that after 10.0-RELEASE, uname on my system still said > "PRERELEASE". That code had not been rebuilt because make did not see it > as needing a rebuild. You can still delete /usr/obj and run a full > buildworld from scratch every so often. > > I should give credit to bdrewery_at_ for reminding me about -DNOCLEAN when I > was whining about ccache not working on 10.0. It turned out to be a better > solution. > Hmm, I particularly like your suggestion of running a full buildworld periodically. With two hour buildworlds (from scratch) I was planning on rebuilding every couple of weeks. If using -DNOCLEAN can significantly reduce my buildworld time, I'll rebuild weekly and do a full build every fourth week. I'm anxious to give this approach a go and see how much time I can save on the buildworlds. Thanks for the info and tips. -TomReceived on Thu Jan 23 2014 - 16:11:14 UTC
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