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Date:      Sat, 13 Nov 2004 18:37:23 +0200
From:      Ruslan Ermilov <ru@freebsd.org>
To:        Alexander Leidinger <Alexander@Leidinger.net>
Cc:        current@freebsd.org
Subject:   Re: [TEST] make -j patch [take 2]
Message-ID:  <20041113163723.GD40075@ip.net.ua>
In-Reply-To: <20041113092215.7a40f133@Magellan.Leidinger.net>
References:  <6857.1100271323@critter.freebsd.dk> <20041112160137.X42945@beagle.kn.op.dlr.de> <1100274897.4194dcd1d67d6@netchild.homeip.net> <20041112171024.P42945@beagle.kn.op.dlr.de> <20041113092215.7a40f133@Magellan.Leidinger.net>

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On Sat, Nov 13, 2004 at 09:22:15AM +0100, Alexander Leidinger wrote:
> On Fri, 12 Nov 2004 17:11:37 +0100 (CET)
> Harti Brandt <harti@freebsd.org> wrote:
>=20
> > On Fri, 12 Nov 2004 Alexander@Leidinger.net wrote:
> >=20
> > > Zitat von Harti Brandt <harti@freebsd.org>:
> > >
> > >> PK>>If yes: we have some ports which aren't -j safe, so this would v=
iolate
> > >> PK>>POLA.
> > >> PK>
> > >> PK>That is what "make -B" is for.
> > >>
> > >> Or .NOTPARALLEL
> > >
> > > I'm not talking about /usr/ports/category/port/Makefile, I'm talking =
about
> > > /usr/ports/category/port/work/tarball_dir/**/Makefile. We don't have
> > > control about those Makefiles.
> > >
> > > As much as I like a flag in the Makefile of a port which indicates
> > > that a port can't be build with -j, we don't have this and the last t=
ime
> > > this topic was discussed there was a strong objection to something li=
ke
> > > this.
> > >
> > > So this change may break procedures which worked so far.
> >=20
> > How? If you specify -j on the port's make the -j gets passed down to al=
l=20
> > sub-makes via MAKEFLAGS and they use it. The difference is just that th=
e=20
> > overall number of jobs started is now limited by the original -j.
>=20
> In my first mail I made an example where a portupgrade is in between two
> make processes. make runs several portupgrade processes in parallel and
> portupgrade calls make. AFAIK this doesn't result in in an invocation of
> portupgrades child-make with -j. With phk's changes the child-make of
> portupgrade uses the FIFO (at least this is what I read implicitly in
> phk's response above).
>=20
Yes.  The presence of MAKE_JOBS_FIFO in environment causes the new
make(1) to run in parallel mode when none of -j and -B options are
specified (either explicitly or through the MAKEFLAGS envariable).
I mentioned it to Poul-Henning that I believe it was a mistake, but
he disagrees, and I don't want to argue about it.


Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer

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