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Asked: 2026-05-28T06:22:28+00:00

I am trying to install dph-examples in mac os x version 10.7.2 and I

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I am trying to install dph-examples in mac os x version 10.7.2 and I got this error. How ever on ghci , I can see

ghci>import Data.Array.Parallel.
Data.Array.Parallel.Base Data.Array.Parallel.Base.DTrace Data.Array.Parallel.Base.TracePrim Data.Array.Parallel.Stream

but not Data.Array.Parallel , Data.Array.Parallel.Prelude and Data.Array.Parallel.Prelude.Double. I copied the example ( it uses these libraries ) given on Data-Parallel-Haskell and its working fine. My program is compiling and running so my question is, why i am not able to see these library at ghci prompt. Also i am not able to find the reference for sumP function at the Data-Array-Parallel. I am using ghc-7.2.1.

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1 Answer

  1. Editorial Team

    GHC depends on Xcode 3.2:

    The package requires Xcode 3.2 (in particular, the “Unix Development Support”) to be already installed.

    — GHC 7.2.1 download page

    Xcode 3.2 should already come with LLVM, so if it’s not already installed, installing it should fix things. If you already have it installed, then your installation might be broken somehow; you could try reinstalling it to make sure. I think Xcode 4 isn’t fully supported by GHC yet, so if you have it installed, that might be the problem; you could try uninstalling it and installing 3.2 instead.

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