[OE-core] [PATCH] local.conf.sample: Add automatic defaults for BB_NUMBER_THREADS and PARALLEL_MAKE

[Richard Purdie]

On Wed, 2014-01-29 at 11:14 +0100, Steffen Sledz wrote:
> On 27.01.2014 15:39, Richard Purdie wrote:
> > Its rather sad that people don't appear to read local.conf and then complain
> > about slow builds when they're just using a single thread. Most systems have
> > more than one core now so we might as well use a more automatic default
> > for these values. This may lead to better experiences for new users.
> > 
> > [YOCTO #2528]
> > 
> > Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
> > ---
> > diff --git a/meta/conf/local.conf.sample b/meta/conf/local.conf.sample
> > index 71856b8..36d33e1 100644
> > --- a/meta/conf/local.conf.sample
> > +++ b/meta/conf/local.conf.sample
> > @@ -18,12 +18,18 @@
> >  # option determines how many tasks bitbake should run in parallel:
> >  #
> >  #BB_NUMBER_THREADS ?= "4"
> > +#
> > +# Default to setting automatically based on cpu count
> > +BB_NUMBER_THREADS ?= "${@oe.utils.cpu_count()}"
> >  # 
> >  # The second option controls how many processes make should run in parallel when
> >  # running compile tasks:
> >  #
> >  #PARALLEL_MAKE ?= "-j 4"
> >  #
> > +# Default to setting automatically based on cpu count
> > +PARALLEL_MAKE ?= "-j ${@oe.utils.cpu_count()}"
> > +#
> >  # For a quad-core machine, BB_NUMBER_THREADS = "4", PARALLEL_MAKE = "-j 4" would
> >  # be appropriate for example.
> 
> On our Fedora-18 build host this change leads to the following exception. :(

Do you have:

http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=721773072da08cf0f5e1206961ada3083b6722b4

?

Cheers,

Richard