[Haskell-cafe] Installing REPA

Dominic Steinitz idontgetoutmuch at googlemail.com
Sat Apr 7 16:42:50 CEST 2012

On 07/04/2012 11:14, Ben Lippmeier wrote:
> On 07/04/2012, at 9:33 AM, Chris Wong wrote:
>> On Sat, Apr 7, 2012 at 2:02 AM, Dominic Steinitz
>> <idontgetoutmuch at googlemail.com>  wrote:
>>> Hi,
>>> I'm trying to install REPA but getting the following. Do I just install
>>> base? Or is it more complicated than that?
>>> Thanks, Dominic.
>> I think the easiest solution is to just use an older version of Repa.
>> According to Hackage, the latest one that works with base 4.3 is Repa
>> $ cabal install repa==
> I've just pushed Repa 3 onto Hackage, which has a much better API than the older versions, and solves several code fusion problems. However, you'll need to upgrade to GHC 7.4 to use it. GHC 7.0.3 is two major releases behind the current version.
> Ben.
Hi Ben, Chris and Others,

Thanks for your replies and suggestions. All I want to do is invert 
(well solve actually) a tridiagonal matrix so upgrading ghc from the 
version that comes with the platform seems a bit overkill. I think I 
will go with Chris' suggestion for now and maybe upgrade ghc (and REPA) 
when I am feeling braver.


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