[Slackbuilds-users] make -j -l

[Niels Horn]

On Sun, Jun 20, 2010 at 10:01 AM, Donald Allen <donaldcallen at gmail.com> wrote:
> Suggestion:
> It would be nice if slackbuilds rummaged around in /proc/cpuinfo, figured
> out how many cores are present and whether hyperthreading is supported, and
> then set the -j option to make accordingly. It would also be good if they
> took a value for the -j option as an argument (in an environment variable,
> much as ARCH is handled). If just the latter were implemented and not the
> former (because of the messiness of doing the former), that would be a
> reasonable compromise, in my view.
> I say this while suffering through a build of webkit on a little mini itx
> box I recently built, with a dual-core Atom D510 with hyperthreading. Atoms
> are slow (I use this machine because I care a lot about my personal energy
> consumption; its silence and coolness is also a bonus), but this build would
> have done quite awhile ago if the make had been done with -j 4 or -j 5 to
> take advantage of the two cores and the hyperthreading. Sure, I could have
> looked at the slackbuild and edited it myself, but multi-core machines are
> common now, so why not support them by making parallel make a standard part
> of slackbuild?
> /Don
>

Donald,

You can set MAKEFLAGS locally to define the -j parameter.

Setting it automatically does not sound right to me.
Users may have systems where the build packages where they do not want
to use all cores for the build process, like a running server.

Niels