[Haskell-beginners] Problem with installing SDL

[Mateusz Kowalczyk]

On 05/09/2014 10:36 AM, Julian Drube wrote:
> Thank you,
> 
> In the file `Graphics/UI/SDL/Events.hsc` I changed the line
> 
> import Data.Typeable (Typeable(typeOf),TypeRep)
> 
> to just
> 
> import Data.Typeable
> 
> and it compiles without problems now.
> 
> Julian
> 
> On Thursday 08 May 2014 17:43:41 Patrick Wheeler wrote:
>> The error is saying that it can not find `typeOf` in the `Typeable` class.
>>  This is because that function is not longer part of the `Typeable` in
>> ghc7.8 and moving forward.  Error like this are still be sorted out for ghc
>> 7.8.  You are on a bleeding edge version of ghc so packaging problems like
>> this are expected.  Package stability is usually marked by when the Haskell
>> Platform updates to the new ghc version.
>>
>> So if you want additional stability HP is where it is at. If you want to
>> live and the bleeding edge then you can download sdl with cabal unpack and
>> see if you can not fix the problem for yourself.
>>
>> Here is a link to the `Typeable` module in base:
>> http://hackage.haskell.org/package/base-4.7.0.0/docs/Data-Typeable.htmlOf
>>
>> There is replacement function for backward compatibility.
>> http://hackage.haskell.org/package/base-4.7.0.0/docs/Data-Typeable.html#v:ty
>> peOf
>>
>> If you fixed the import statement for all of the sdl modules, you might fix
>> the incompatibility with the new Typeable.  There will probably be a few
>> other issues that need solving after this one. I have updated several
>> packages on a case by case basis when I need them to new ghc version and
>> has been a lesson in understanding ghc errors and fixing them. If you have
>> the time I recommend giving it a shot.
>>
>> Patrick
> _______________________________________________
> Beginners mailing list
> Beginners at haskell.org
> http://www.haskell.org/mailman/listinfo/beginners
> 

Please send a patch or a pull request to the maintainer.

-- 
Mateusz K.