[Haskell-beginners] Dependence issue

[Alexey G]

Thank you! I already rapport about this issue to the mantainer of
HDBC-mysql.

2011/4/2 Krzysztof Skrzętnicki <gtener at gmail.com>

> Changing the dependency isn't enough. You also want to bump the version
> number (say, A.B.C.D into A.B.C.D.1) and make your project depend on the
> bumped version. This way cabal wont find that version anywhere but in
> installed database and will continue just fine.
>
> If the library works fine under base-4 you might also contact the developer
> so that he can upload the new version which will allow you to drop that hack
> altogether.
>
> Working with such locally-changed versions can be easier if you try
> cabal-devel tool or similar.
>
> But I think might consider another solution: don't use that library. As HDBC
> docs<http://hackage.haskell.org/packages/archive/HDBC/2.2.6.1/doc/html/Database-HDBC.html>says:
>
>  ODBC Available from http://software.complete.org/hdbc-odbc. Or, to
> partitipace in development, use git clone git://git.complete.org/hdbc-odbc
> MySQL MySQL users have two choices: the first is the ODBC driver, which
> works and has been tested against MySQL on both Linux/Unix and Windows
> platforms. There is also an *alpha-quality* native MySQL driver available
> for download at
> http://hackage.haskell.org/cgi-bin/hackage-scripts/package/HDBC-mysql with
> a homepage at http://www.maubi.net/~waterson/hacks/hdbc-mysql.html.
>
> So clearly, HDBC developer(s?) think that HDBC-odbc is the way.
>
>
> Best regards,
> Krzysztof Skrzętnicki
>
> On Sat, Apr 2, 2011 at 00:46, Alexey G <kreed131 at gmail.com> wrote:
>
>> Hello. I have some trouble with HDBC-mysql package (
>> http://hackage.haskell.org/package/HDBC-mysql).
>> It depends on base (<4), but in GHC 7 - base 4.3.1.
>> I download a HDBC-mysql package and change dependence in .cabal file to
>> base (<5). It works fine.
>> But I want to build another package that depend on HDBC-mysql and cabal
>> check dependencies from the hackage, where is HDBC-mysql depend on base
>> (<4).
>>
>> What I should do?
>>
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>
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