Date: Fri, 9 Jul 2004 17:59:01 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src Makefile Message-ID: <20040709145901.GB2773@ip.net.ua> In-Reply-To: <23949.1089384305@critter.freebsd.dk> References: <20040709144332.GA2773@ip.net.ua> <23949.1089384305@critter.freebsd.dk>
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On Fri, Jul 09, 2004 at 04:45:05PM +0200, Poul-Henning Kamp wrote:
> In message <20040709144332.GA2773@ip.net.ua>, Ruslan Ermilov writes:
> >
> >--sdtB3X0nJg68CQEu
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> >
> >On Fri, Jul 09, 2004 at 01:55:50PM +0000, Poul-Henning Kamp wrote:
> >> phk 2004-07-09 13:55:50 UTC
> >>=3D20
> >> FreeBSD src repository
> >>=3D20
> >> Modified files:
> >> . Makefile=3D20
> >> Log:
> >> Add a JFLAG which can be used to speed up universe:
> >> make universe JFLAG=3D3D-j12
> >> =3D20
> >> Revision Changes Path
> >> 1.300 +3 -3 src/Makefile
> >>=3D20
> >What was wrong with ``make -j12 universe''?
>=20
> It doesn't work. You want the individual buildworlds
> to get a -j12, not the outside for-loop.
>=20
I'm sure it works. Outside for-loop cannot be affected by
-j12 because .for is unparallelizeable -- it just expands
the lines using the loop variable. And -j12 is passed happily
to the individual buildworlds in .MAKEFLAGS. Consider this
makefile:
: 1 2 3 4 5:
: @sleep `jot -r 1 0 1.0`
: @echo ${.TARGET} ${.MAKEFLAGS}
:=20
: all: 1 2 3 4 5
:=20
: all2:
: .for target in 1 2 3 4 5
: cd ${.CURDIR} && ${MAKE} ${target}
: .endfor
$ make -j4 all
2 -j 4
4 -j 4
5 -j 4
3 -j 4
1 -j 4
$ make -j4 all2
cd /usr/home/ru && make 1
1 -j 4
cd /usr/home/ru && make 2
2 -j 4
cd /usr/home/ru && make 3
3 -j 4
cd /usr/home/ru && make 4
4 -j 4
cd /usr/home/ru && make 5
5 -j 4
Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer
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