parallel builds revisited
kris at obsecurity.org
Sat Apr 14 05:50:43 UTC 2007
On Sat, Apr 14, 2007 at 07:12:21AM +0200, [LoN]Kamikaze wrote:
> Kris Kennaway wrote:
> > On Thu, Apr 12, 2007 at 09:31:37PM +0200, [LoN]Kamikaze wrote:
> >>> Btw, do you think it's possible that a port can only be built with, n
> >>> parallel make jobs, but will fail with n+1?
> >> No. I do not think this can be the case.
> > It certainly is the case. If a makefile has incorrectly specified
> > dependencies then it may build by accident for certain values of n.
> > There are also lots of ports with race conditions which means they may
> > sometimes build but not always.
> I am aware of the theoretical existence of such problems, but has that ever actually happened? In my experience the port fails whenever something is wrong. I've never had a case where a port that didn't work because of 'make -j' worked when I tried again or with a different number of jobs.
Yes, even /usr/src has had those kinds of problems in the past.
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