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

[coot at coot.me]

Let's also mention that there's work to have a single semaphore which governs the concurrency in a better way which allows the tooling to dynamically decide how many cores to use for compiling a package when multiple of them are being compiled.

Regards,
Marcin


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On Tuesday, 2 April 2024 at 13:37, Alexey Vagarenko <vagarenko at gmail.com> wrote:

> Hi,
>
> There is -j flag for this: https://cabal.readthedocs.io/en/3.4/cabal-project.html#cfg-field-jobs
>
> 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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