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

I’ve been using semaphore concurrency builds since GHC 9.8 was released. Works like a charm, very nice, but yes, one has to build cabal-install HEAD or wait until cabal-3.12 is out (which is soon AFAIU). Best regards, Andrew

On 2 Apr 2024, at 16:18, Brandon Allbery wrote:

It's only in HEAD at present and will be in 3.12.

On Tue, Apr 2, 2024 at 8:07 AM Bryan Richter via Haskell-Cafe wrote: 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 wrote:

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Am Dienstag, dem 02.04.2024 um 16:37 +0500 schrieb Alexey Vagarenko:

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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

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On Tue, Apr 2, 2024 at 4:23 PM Volker Wysk wrote:

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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 _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

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-- brandon s allbery kf8nh allbery.b@gmail.com _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.