Hi everyone, I had looked at Haskell some years ago but dropped it because there wasn't much support for the kind of work I do, which is numerical computation. Now there's exciting new stuff such as repa, so I decided to give it another try. I installed the Haskell platform 2011.2.0.1 for MacOS X 10.6 and started working through the tutorial at http://www.haskell.org/haskellwiki/Numeric_Haskell:_A_Repa_Tutorial Unfortunately I didn't get very far, because I am stuck at installing repa: cabal install repa Resolving dependencies... cabal: cannot configure repa-2.2.0.1. It requires base ==4.4.* For the dependency on base ==4.4.* there are these packages: base-4.4.0.0. However none of them are available. base-4.4.0.0 was excluded because of the top level dependency base -any I don't understand what this means (what's so bad about "any"?) nor do I have the slightest clue what to do about it. There's a brief Stack Overflow discussion about this at http://stackoverflow.com/questions/7375719/cabal-install-dependency-error-ba... but it doesn't provide a solution either. Any help would be greatly appreciated - I just recall that my goal is not understanding cabal, but working with repa. Konrad.
Hi.
Unfortunately I didn't get very far, because I am stuck at installing repa:
cabal install repa Resolving dependencies... cabal: cannot configure repa-2.2.0.1. It requires base ==4.4.* For the dependency on base ==4.4.* there are these packages: base-4.4.0.0. However none of them are available. base-4.4.0.0 was excluded because of the top level dependency base -any
There are two issues here: (1) The latest version of repa doesn't work with ghc-7.0.3 or ghc-7.0.4. These provide base-4.3, and base is hardwired in GHC and cannot be upgraded. The easiest way for you to get around this is to explicitly say "cabal install repa-2.1.1.5". (2) Your version of cabal-install provides bad feedback (instead of base -any it should really say that it has to be the version of base that comes with your GHC) and fails to detect that it in fact could just install repa-2.1.1.5. The current development version of cabal-install fixes both problems. However, as long as the fix suggested in (1) works for you, there's no immediate need to upgrade. Cheers, Andres
On 28 Oct, 2011, at 19:38 , Andres Löh wrote:
(1) The latest version of repa doesn't work with ghc-7.0.3 or ghc-7.0.4. These provide base-4.3, and base is hardwired in GHC and cannot be upgraded. The easiest way for you to get around this is to explicitly say "cabal install repa-2.1.1.5".
That works fine indeed. Thanks! Konrad.
participants (2)
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Andres Löh -
Konrad Hinsen