[Pkg-haskell-maintainers] Bug#778987: Bug#778987: mismatched versions of cabal-install and Cabal result in build failures

[Joachim Breitner]

Hi,

Am Montag, den 23.02.2015, 07:49 +0100 schrieb Sven Bartscher:
> Making cabal-install depend on the newer version of libghc-cabal-dev,
> should fix this. It would also spare us from finding errors like this
> in other packages.

sounds reasonable. Can you make it so that the cabal-install package
automatically depends on the right Cabal package, using substvars? A
manual dependency in debian/control will likely get forgetten.

>  If we decide to do this, we should probably
> transition to stop shipping cabal together with GHC, since no one will
> have cabal-install and thus libghc-cabal-dev installed, which defies
> the reason to have the GHC version of cabal installed.

That’s not easily possible: ghc (the library) depends on the version of
Cabal coming with GHC.

There are plans upstream to change that, but that won’t happen before
7.12, see  https://ghc.haskell.org/trac/ghc/ticket/8244 and
https://ghc.haskell.org/trac/ghc/wiki/CabalDependency

Greetings,
Joachim


-- 
Joachim "nomeata" Breitner
Debian Developer
  nomeata at debian.org | ICQ# 74513189 | GPG-Keyid: F0FBF51F
  JID: nomeata at joachim-breitner.de | http://people.debian.org/~nomeata

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