On 24/01/15 13:23, Daniel Frey wrote: > On 01/23/2015 08:20 PM, meino.cra...@gmx.de wrote: >> Hi, >> >> for my embedded systems I use gentoo. Their "harddisk"s are simple >> microSDcards. >> >> When updateing or emerging especially the "Calculation >> dependencies..." is a step which needs a lot of patience of the >> user (me ;). > > I have a QX9650 and it can be a few minutes on mine, especially on a > world update. My slower CPUs (Celerons) can take more than five minutes, > I don't even want to think about embedded. > >> Is there any way to make it faster or (in other words): Are there >> different ways to "Calculating dependencies..." and have only chossen >> the slowest one...? > > I'd be interested as well to know as well. It used to be it did a simple > dependency check and installed packages - then revdep-rebuild could > check for packages that need rebuilds. > > It's not really an issue if you only run emerge once, but if you have to > do it several times in one session it gets old really quick. It reminds > me of waiting for Windows XP checking for updates. Just give it a half > hour, it'll figure it out. :-( > > Dan >
distcc can make a big difference on slow machines where you have 3 or so hosts to throw jobs at. ccache in particular speeds up multiple passes at an emerge. Downside is a few packages cant use ccache and exhibit seemingly random failures to compile but if known they can be excluded using a portage setting. BillK
