Cabal problem re. haskelldb-hdbc-mysql
Hi, the package http://hackage.haskell.org/package/haskelldb-hdbc-mysql/ the use of HDBC <2.3.0 I'm using cabal-install 0.14, and with a fresh install (no packages already installed), cabal-install tries to install HDBC-2.1.1 instead of, say, HDBC-2.2.7.0. The problem is that HDBC-2.1.1 is old (2009) and does not compile. When I download haskelldb-hdbc-mysql manually, change the dependency and then install, it compiles fine. Is the dependency ill-declared, or is that a cabal problem?
On Wed, Jul 4, 2012 at 3:58 PM, Yves Parès
Hi, the package http://hackage.haskell.org/package/haskelldb-hdbc-mysql/ the use of HDBC <2.3.0 I'm using cabal-install 0.14, and with a fresh install (no packages already installed), cabal-install tries to install HDBC-2.1.1 instead of, say, HDBC-2.2.7.0.
The problem is that HDBC-2.1.1 is old (2009) and does not compile.
When I download haskelldb-hdbc-mysql manually, change the dependency and then install, it compiles fine.
Is the dependency ill-declared, or is that a cabal problem?
Apart from the change of license, there were no serious changes to the HDBC interface between the 2.2.* and 2.3.* series: as far as I know, it should be fine to change the dependency. That said, I've not worked with haskelldb-hdbc-mysql, so I can't say for sure.
On 12-07-04 10:58 AM, Yves Parès wrote:
the package http://hackage.haskell.org/package/haskelldb-hdbc-mysql/ the use of HDBC <2.3.0 I'm using cabal-install 0.14, and with a fresh install (no packages already installed), cabal-install tries to install HDBC-2.1.1 instead of, say, HDBC-2.2.7.0.
HDBC 2.2.* all want time>=1.1.2.4 && <=1.2.0.3, GHC 7.4.1 comes with time-1.4, therefore HDBC 2.2.* are all rejected. 2.1.1 is the topmost one without the upper bound. This analysis is made possible by "cabal install --dry-run -v3 haskelldb-hdbc-mysql" of cabal-install 0.14. Now with actually relevant output! (As part of the new "modular" solver, I guess.) P.S. haskelldb-hdbc wants mtl-2.0.*, but you already have mtl-2.1 because you have cabal-install 0.14. mtl-2.0.1.0 in turn wants transformers-0.2.*, but you already have transformers-0.3.0.0 again because you have cabal-install 0.14. Expect mysterious problems in the future.
participants (3)
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Albert Y. C. Lai -
Nicolas Wu -
Yves Parès