cabal doens't forget old dependencies
Hi all, I tried to install reactive-banana. This failed due to a dependency conflict, and then I noticed there was a newer version of reactive-banana. So I did cabal update, and tried to install again. But whatever I do, cabal keeps trying to install fclabels, but fclabels is no longer a dependency of reactive-banana-0.6.0.0! How can I let cabal forget this dependency? Thanks, -- Sjoerd Visscher https://github.com/sjoerdvisscher/blog
Hi.
I tried to install reactive-banana. This failed due to a dependency conflict, and then I noticed there was a newer version of reactive-banana. So I did cabal update, and tried to install again. But whatever I do, cabal keeps trying to install fclabels, but fclabels is no longer a dependency of reactive-banana-0.6.0.0! How can I let cabal forget this dependency?
From the reactive-banana Cabal file:
if flag(UseExtensions) extensions: TypeFamilies, GADTs, MultiParamTypeClasses, BangPatterns, TupleSections, EmptyDataDecls build-depends: QuickCheck >= 1.2 && < 2.5, fclabels == 1.1.*, unordered-containers >= 0.2.1.0 && < 0.3, hashable == 1.1.* CPP-options: -DUseExtensions So try "-f-UseExtensions" if you really want that? Cheers, Andres -- Andres Löh, Haskell Consultant Well-Typed LLP, http://www.well-typed.com
Ah, ok. I wasn't aware how flags work in Cabal, thanks. Makes me wonder why that flag was turned off on hackage. http://hackage.haskell.org/package/reactive-banana On Jun 27, 2012, at 5:51 PM, Andres Löh wrote:
Hi.
I tried to install reactive-banana. This failed due to a dependency conflict, and then I noticed there was a newer version of reactive-banana. So I did cabal update, and tried to install again. But whatever I do, cabal keeps trying to install fclabels, but fclabels is no longer a dependency of reactive-banana-0.6.0.0! How can I let cabal forget this dependency?
From the reactive-banana Cabal file:
if flag(UseExtensions) extensions: TypeFamilies, GADTs, MultiParamTypeClasses, BangPatterns, TupleSections, EmptyDataDecls build-depends: QuickCheck >= 1.2 && < 2.5, fclabels == 1.1.*, unordered-containers >= 0.2.1.0 && < 0.3, hashable == 1.1.* CPP-options: -DUseExtensions
So try "-f-UseExtensions" if you really want that?
Cheers, Andres
-- Andres Löh, Haskell Consultant Well-Typed LLP, http://www.well-typed.com
-- Sjoerd Visscher https://github.com/sjoerdvisscher/blog
Hi.
On Wed, Jun 27, 2012 at 6:14 PM, Sjoerd Visscher
Ah, ok. I wasn't aware how flags work in Cabal, thanks.
Makes me wonder why that flag was turned off on hackage. http://hackage.haskell.org/package/reactive-banana
I'm not sure "it was turned off". I see that it lists only some of the dependencies. It's a general phenomenon. I don't understand the way Hackage lists package dependencies. I'd appreciate if it'd actually show the whole conditional tree of dependencies. Cheers, Andres -- Andres Löh, Haskell Consultant Well-Typed LLP, http://www.well-typed.com
On 12-06-27 11:29 AM, Sjoerd Visscher wrote:
I tried to install reactive-banana. This failed due to a dependency conflict, and then I noticed there was a newer version of reactive-banana. So I did cabal update, and tried to install again. But whatever I do, cabal keeps trying to install fclabels, but fclabels is no longer a dependency of reactive-banana-0.6.0.0! How can I let cabal forget this dependency?
In http://hackage.haskell.org/packages/archive/reactive-banana/0.6.0.0/reactive... : if flag(UseExtensions) extensions: TypeFamilies, GADTs, MultiParamTypeClasses, BangPatterns, TupleSections, EmptyDataDecls build-depends: QuickCheck >= 1.2 && < 2.5, fclabels == 1.1.*, unordered-containers >= 0.2.1.0 && < 0.3, hashable == 1.1.* CPP-options: -DUseExtensions Recall that the semantics of "if flag" is like Prolog not Pascal: if the packages under build-depends could be installed, then UseExtensions is set to true. Unless you manually override.
participants (3)
-
Albert Y. C. Lai -
Andres Löh -
Sjoerd Visscher