zimoun <[email protected]> skribis: > On Mon, 12 Oct 2020 at 12:34, Ricardo Wurmus <[email protected]> wrote: > >> > Does the parallel build save a lot of time and CPU? If yes, maybe we >> > could to provide a transformation for the expert, something like >> > "haskell-build-system-with-parellel-build" which tweaks >> > "PARALLEL-BUILD?", similarly to the recent "no tests". WDYT? >> >> We shouldn’t compromise reproducibility for parallel builds. Ideally we >> would figure out what exactly causes the differences and fix that >> instead of disabling parallel builds, but if that turns out to be too >> difficult I think we should just revert this until we have a good fix. >> >> Perhaps something can be done by fixing the order of files somewhere. > > My proposal is for the expert and not at the CLI level. Something > like "(funky-name ghc-foo)" which returns a new package with > PARALLEL-BUILD? turned to #t. And the default should be #f. WDYT?
You can always build with ‘--cores=1’, which will ensure both the build and test will run sequentially. Ludo’.
