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Re: Intermittent parallel make rebuild failures

From: David Highley
Subject: Re: Intermittent parallel make rebuild failures
Date: Tue, 5 Oct 2010 06:10:25 -0700 (PDT)

"Edward Welbourne wrote:"
> > it appears from running make with the debug option that the
> > top level make does not see the object file created by the lower level
> > make in the time when it checks the dependencies for the library.
> sounds a *lot* like an issue with make's caching of stat information;
> if the uppper make has looked, before the lower makes them, for files
> the lower makes, then its cached information about these files is
> still in place telling it they're missing even after the lower has
> made them.

Every time the subject of cache comes up its because they are always

> That this only happens in parallel builds suggests that, while the
> lower make is at work, the upper is attempting to get on with things
> that actually depend on the lower.  So you may find that making
> completion of the lower a prerequisite of the rules that are being
> broken will help.
>       Eddy.

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