parallel builds revisited

[LoN]Kamikaze LoN_Kamikaze at
Sat Apr 14 05:12:29 UTC 2007

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.

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