[Haskell-cafe] Cabal: Can only one processor core be used?

[Bryan Richter]

BTW the "semaphore" solution mentioned was introduced in this
proposal: https://github.com/ghc-proposals/ghc-proposals/pull/540

Looks like it may be present in the latest Cabal (3.10) and latest GHC
(9.8)? I'm curious to know if anyone's using it yet. :)


On Tue, 2 Apr 2024 at 14:50, Volker Wysk <post at volker-wysk.de> wrote:
>
> Am Dienstag, dem 02.04.2024 um 16:37 +0500 schrieb Alexey Vagarenko:
> > Hi,
> >
> > There is -j flag for this:
> > https://cabal.readthedocs.io/en/3.4/cabal-project.html#cfg-field-jobs
>
> Okay, great. But only whole packages will be compiled in parallel, as
> Henning has pointed out.
>
> Cheers,
> Volker
>
> > On Tue, Apr 2, 2024 at 4:23 PM Volker Wysk <post at volker-wysk.de> wrote:
> > > Hi
> > >
> > > I've searched the web and the cabal user guide on how to use more
> > > processor
> > > cores for compilation via cabal. I couldn't find anything.
> > >
> > > It looks like only one processor core can be used with cabal, even
> > > though
> > > (I've read on the web) GHC supports parallel compilation.
> > >
> > > Cabal compilation times can be a pain. It can't be that you can use only
> > > one
> > > processor core with cabal, can it ..?
> > >
> > > Cheers,
> > > Volker
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