[Haskell-cafe] Data.ByteString vs Data.ByteString.Lazy vs Data.ByteString.Char8

[Galchin, Vasili]

based on "ghc-pkg list" ....

in my "global" ghc install I have bytestring-0.9.0.1

in my "local" ghc install I have bytestring-0.9.1.0

this difference of versions I strongly think is causing my problems..

When I run "cabal install bytestring" from the CLI, I get "resolving
differences" ....

If my assertion that the "delta" between the "global" vs "local" is causing
my compile problems, then what should I do??

Regards, Vasili


On Wed, Dec 3, 2008 at 1:52 AM, Galchin, Vasili <vigalchin at gmail.com> wrote:

> Warning: This package indirectly depends on multiple versions of the same
> package. This is highly likely to cause a compile failure.
> package binary-0.4.2 requires bytestring-0.9.0.1
> package bio-0.3.4.1 requires bytestring-0.9.1.0
>
>
> ah ha .. Ketil, this is what you are saying? If so, how do I fix? install a
> newer version of binary?
>
> regards, vasili
>
> On Wed, Dec 3, 2008 at 1:32 AM, Ketil Malde <ketil at malde.org> wrote:
>
>> "Galchin, Vasili" <vigalchin at gmail.com> writes:
>>
>> > I think I am getting a namespace collition between
>> >
>> >       Data.ByteString.Lazy.Char8.ByteString
>> >
>> > and
>> >
>> >      Data.ByteString.Lazy.Internal.ByteString ....
>>
>> You rarely need to import 'Internal' directly.
>>
>> > here is the error message ....
>> >
>> >     Couldn't match expected type `B.ByteString'
>> >            against inferred type
>> > `bytestring-0.9.0.1:Data.ByteString.Lazy.Internal.ByteString'
>>
>> Are you sure this is not just a versioning problem?  I.e. that some
>> library is built against bytestring-0.X.Y, but your current import is
>> bytestring-0.A.B, but your program expects these to be the same?  (And
>> they probably are, but the compiler can't really tell).
>>
>> -k
>> --
>> If I haven't seen further, it is by standing in the footprints of giants
>>
>
>
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