It should not be necessary to uninstall ghc, as hask plat and ghc are orthogonal by design. r Unless there is some gotcha I am unaware of, not being a mac user. You are aware that hask plat is beta though, right? You might be better served simply upgrading your cabal, and waiting for the all-in-one mac packager to be really shiny. You can grab cabal here, and after you have unzipped it run the bootstrap script which also downloads dependencies you might need. cheers. 2010/3/10 David Place :

Hi:

I am running GHC 6.10.4 on Mac OSX 10.6.2.   Somehow, I have a broken version of Cabal (1.6.0.3) installed.  In order to fix it, I thought I should just upgrade to the Haskell Platform.  Is it necessary to uninstall my current GHC first?  If, so, how?

Thanks you.

Cheers, David

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On Wed, Mar 10, 2010 at 8:50 AM, David Place wrote:

Hi:

I am running GHC 6.10.4 on Mac OSX 10.6.2. Somehow, I have a broken version of Cabal (1.6.0.3) installed.

In what was is it broken? A co-worker of mine had problem recently where her cabal was giving "Bus error" whenever it tried to use network functionality (fetch, update, install). We could see where this was happening by running something like: gdb --args cabal install

run

And we'd see the mangle name of Network.Socket.getSocketOptions at the top of the stack trace. dtruss wasn't much help here, but that may have been a lack of experience with that tool. The solution for my co-worker was to upgrade to network-2.2.1.7 then rebuild HTTP-4000.0.9 against the upgraded network library then rebuild/reinstall the latest Cabal and cabal-install packages. This had to be done using runghc Setup ... instead of cabal. Whenever she would type 'cabal install' (even from inside a package's directory) it would try to download from hackage and give another Bus error. Does that sound like your problem?

In order to fix it, I thought I should just upgrade to the Haskell Platform. Is it necessary to uninstall my current GHC first? If, so, how?

I don't think you need to uninstall your current GHC. I tend to have multiple GHC's installed. But, you should know that the next Haskell Platform release is very soon (before the end of the month) and it will include ghc 6.12. I hope that helps, Jason