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Today's Topics:
1. Re: The Data Parallel Haskell example from the Haskell Wiki
won't work (Jo?o Paulo Pizani Flor)
----------------------------------------------------------------------
Message: 1
Date: Wed, 29 Sep 2010 08:47:51 -0300
From: Jo?o Paulo Pizani Flor <[email protected]>
Subject: Re: [Haskell-beginners] The Data Parallel Haskell example
from the Haskell Wiki won't work
To: Ben Lippmeier <[email protected]>
Cc: [email protected]
Message-ID:
<[email protected]>
Content-Type: text/plain; charset="utf-8"
Thanks a lot Ben!
Shame on me, I've really forgotten that PRAGMA line, but now everything
works as it should...
[]s
João Paulo Pizani Flor
[email protected]
Computer Science - 2007
Federal University of Santa Catarina - Brazil
On Wed, Sep 29, 2010 at 4:27 AM, Ben Lippmeier <[email protected]> wrote:
>
> >> Has someone been able to successfully compile and run this example
> code?? If so, what am I doing wrong? Is there some obvious error I'm
> incurring in? :D
> >
> > It's because you didn't add {-# OPTIONS -fvectorise #-} when compiling
> the DPHVectMul.hs module. The GHC vectoriser rewrites calls to fromPArrayP
> to the real implementations in its back-end library, but if the vectoriser
> doesn't run you get the default implementation which is just "undefined". I
> agree its an atrocious error message. It should have a real one in the head
> / GHC 7.0
>
> You can also add -fvectorise on the command line, but I prefer using the
> OPTIONS pragma because it's less easy to forget.
>
> Ben.
>
>
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