[Haskell-cafe] Confusions about the Haskell Platform (for Mac)

Daniel Fischer daniel.is.fischer at web.de
Wed Apr 7 17:52:15 EDT 2010

Am Mittwoch 07 April 2010 23:43:05 schrieb Ivan Lazar Miljenovic:
> Malcolm Wallace <malcolm.wallace at cs.york.ac.uk> writes:
> > The Haskell Platform is not like a standard user application, where it
> > would be reasonable to have only one version installed at a time.
> As far as I know, most Linux distributions only let you install one
> version of GHC at a time;

I currently have 6.10.1, 6.10.3 and 6.12.1 installed (openSuSe 11.1), no 
On my previous computer (SuSE 8.2), I had every release from 6.2.2 to 
6.8.2, no problem either.

> we do this with Gentoo because despite there
> being some distribution-specific architecture in place to be able to
> switch between compilers (used for GCC, Ruby, Python, etc.) we haven't
> resolved how to deal with dependency problems when a library was built
> with one version of GHC and then you try to build something that depends
> upon it with another version of GHC (since the package manager _knows_
> that the dependency is installed, yet GHC is vehement that it knows
> nothing about it).

Ah, but one shouldn't use a package manager for Haskell packages.
Cabal is far superior to all of them 8-)

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