[arch-general] Default value of "j" in makeflags of makepkg.conf

[Martin S. Weber]

On Sat, Jan 04, 2014 at 01:07:47AM +1000, Allan McRae wrote:
> On 04/01/14 01:03, Martin S. Weber wrote:
> > On Fri, Jan 03, 2014 at 03:23:24PM +0100, Thomas B?chler wrote:
> >> Am 03.01.2014 15:21, schrieb Martti K?hne:
> >>> You can't expect every upstream to fix their autohell to conform to
> >>> our expectations here.
> >>
> >> So, we keep repeating ourselves.
> >>
> >> There is the !makeflags option for PKGBUILDs to work around this problem
> >> (which you would know if you read the thread). If a package is broken
> >> with -j, this option helps.
> >>
> > 
> > netbsd / pkgsrc did switch to a more concurrent default for $MAKE_JOBS.
> > 
> > MAKE_JOBS_SAFE=no is a way to turn it off.
> > 
> > In current 'stable' pkgsrc, 590 / 11862 packages have it set (to no,
> > i.e., not parallel build safe).
> > 
> > Each predates someone running into the pkg not building for them while
> > it built for others.
> > 
> > You wanna find those inexplicably not building on some machines manually,
> > again?
> > 
> > Have fun.
> > 
> 
> Why would it need done manually?   You have already found us a list!
> 

because for each new occurrence, it will have to be determined manually:
concurrency brings non-determinism with it. Many of these pkgs built
just fine (tm) for developers a, b and d (not only on, but also on multi-core
and/or SMP machines) while it didn't for devs c, f, g, and, much worse,
for users u, y and z.

I mean, feel free to learn the sane default for (said 590) pkgs from pkgsrc,
or consider the process that spans from 2007 until now, where pkgs still are
flagged MAKE_JOBS_SAFE after the first user has run into them not building.

Also, not each pacman pkg has a 1:1 mirror candidate in pkgsrc.

IMHO, should make you pause and (re)consider for a moment.

Kind Regards,
-Martin