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Support GHC's -jsem <sem> initiative #6131

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mpilgrem opened this issue May 28, 2023 · 0 comments
Open

Support GHC's -jsem <sem> initiative #6131

mpilgrem opened this issue May 28, 2023 · 0 comments
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component: build help wanted type: enhancement

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@mpilgrem
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The motivation for this issue is the GHC proposal (accepted on 2023-03-22) "jsem: parallelism semaphores for GHC". See:

The GHC proposal anticipates that the required changes to Stack would be 'small and non-invasive'.

Currently:

  • Stack does make use of GHC's existing -j[<n>] flag (except, possibly, in Stack.Setup.buildGhcFromSource).
  • Stack's jobs configuration option is passed to Control.Concurrent.Execute.runActions, which uses it (as threads) in the action replicateConcurrently_ threads $ runActions' es
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@mpilgrem