On Sun, Oct 01, 2006 at 09:52:14AM -0700, Donnie Berkholz wrote: > Tiziano Müller wrote: > >-----BEGIN PGP SIGNED MESSAGE----- > >Hash: SHA1 > > > >Hi everyone > > > >It seems that setting the number of parallel builds using '-jN' does not > >only work for make, but also for scons and bjam (and maybe others as well). > >Since it isn't save to assume that '-jN' is the only option in MAKEOPTS, > >some filtering is needed. > >Now, SCONSOPTS (BJAMOPTS respectively) could be added to make.conf and used > >whenever one of those build-systems is being used. But we would probably > >have to add a ...OPTS for every build-system. > > > >What do you think? Better ideas? > > I think adding it for each build system is probably a good idea, > nobody's guaranteeing option-level compatibility with make. Optionally > falling back to using the few valid MAKEOPTS might be a nice addition.
I might be daft (likely), but why not just introduce a var indicating
max parallelization instead? Tweak portage to push that setting into
MAKEOPTS="${MAKEOPTS+${MAKEOPTS} } -j${PARALLELIZATION}".
Might sound daft, but -j is hardcoded parallelization; if you're
trying to run 3 build processes, the original var of -j isn't all that
useful, nor will the hardcoded -j# var set for 3 package build
processes be useful if you're doing a single build.
Depending on number of seperate package build processes possible, the
# of build processes allocated per build process needs to vary
(essentially).
Now... that's a bit ahead of what portage is doing atm, but folks
*will* parallelize portage building (see bug 147516 if in doubt), so
its not too far out.
Getting back to the actual topic, set this var, it's a raw int that a
scons/bjam eclass can use to easily set appropriate var with the
parallelization requested, thus unifying this particular knob; more
importantly, it gives them a way to do what they're after while
exposing a knob that the pkg manager can easily fiddle with for global
parallelization needs.
Only downside to it I see is that it requires mangling the pkg manager
to translate the parallelization setting into MAKEOPTS+=-j#; can't
really get around that however due to the fact MAKEOPTS is already
forced in installed configuration though.
Thoughts?
~harring
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