From: Hugh Sasse <hgs@...>
Date: 2006-11-02T01:55:22+09:00
Subject: Re: parallel tasks with rake ?

On Thu, 2 Nov 2006, quixoticsycophant@yahoo.com wrote:

> 
> Wilson Bilkovich wrote:
> >
> > How does Make figure out which jobs can be run in parallel? In my
> > experience, it just runs everything in parallel, and things break when
> > the tasks aren't safely parallelizable. (e.g. doing make -j4 install
> > on a FreeBSD port)
> 
> The Make program figures it out from the dependency graph.
> Unfortunately, the 'install' target you mention is a fake target which
> depends on nothing.  Such uses of 'install' are common but incorrect.
> As a workaround, 'install' (and any other wrongly written targets)
> should be treated as a special case and should not be run with -j.

Would marking it as a .PHONY help?  I see little advice in the GNU
make manual about how to get this sort of thing right for parallel
make.  Where should one look for such info?

        Hugh