On Wed, Nov 19, 2008 at 9:43 PM, Don Stewart <dons@galois.com> wrote:

Could you add this info/link to the upgrading page?

http://www.haskell.org/haskellwiki/Upgrading_packages#Arrow_instances>,

Using social/community processes to parallelise the job of finding all
the upgrade routes -- I like it :-)

-- Don

conal:

> Hi Wolfgang,
>
> I use CPP to manage such differences between 6.8, 6.9, and 6.10. As an
> example, see

> [1]http://hackage.haskell.org/packages/archive/TypeCompose/latest/doc/html/src/Control-Compose.html

> .
>
> Regards, - Conal
>
> On Tue, Nov 18, 2008 at 6:01 AM, Wolfgang Jeltsch

> <[2]g9ks157k@acme.softbase.org> wrote:
>
> Hello,
>
> how do I make a library work with both GHC 6.8 and GHC 6.10? According
> to

> <[3]http://www.haskell.org/haskellwiki/Upgrading_packages#Arrow_instances>,

> I
> should change all my Arrow instances but then they don't work with GHC
> 6.8
> anymore, do they? Or is the solution to force GHC 6.8 users to use
> base-4.0.0.0?
>
> Best wishes,
> Wolfgang
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> References
>
> Visible links
> 1. http://hackage.haskell.org/packages/archive/TypeCompose/latest/doc/html/src/Control-Compose.html
> 2. mailto:g9ks157k@acme.softbase.org
> 3. http://www.haskell.org/haskellwiki/Upgrading_packages#Arrow_instances
> 4. mailto:Haskell-Cafe@haskell.org
> 5. http://www.haskell.org/mailman/listinfo/haskell-cafe

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