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From: Richard Purdie <richard.purdie@linuxfoundation.org>
To: Patches and discussions about the oe-core layer
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Date: Mon, 12 Dec 2011 21:30:09 +0000
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Subject: Re: [PATCH] kernel.bbclass: Allow do_compile_kernelmodules to use PARALLEL_MAKE
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On Mon, 2011-12-12 at 18:21 +0000, Phil Blundell wrote:
> On Sat, 2011-12-10 at 15:28 -0800, Khem Raj wrote:
> > in base.bbclass oe_runmake says
> > 
> > ${MAKE} ${EXTRA_OEMAKE} "$@"
> > 
> > and
> > 
> > conf/bitbake.conf says
> > 
> > EXTRA_OEMAKE_prepend_task-compile = "${PARALLEL_MAKE} "
> > 
> > hmmm so we dont parallel make if task is not called do_compile ?
> 
> Indeed.  It's been that way basically forever; I think this was to avoid
> a class of problems caused by trying to run "make install" with -j.  
> 
> It's possible that the general situation has improved a bit since that
> code was written and it might be interesting to try enabling it for
> install as well and see what happens.

I recently merged patches to default to add PARALLEL_MAKE to do_install.
We have had surprisingly few issues with that. I think autotools itself
got fixed and hence so did anything using it. I guess anything with
broken makefiles already disables PARALLEL_MAKE so it seemed to work
pretty well.

Cheers,

Richard