[Haskell-beginners] Re: installing cabal with 6.10 - ubuntu
bburdette at comcast.net
Tue Mar 10 09:59:36 EDT 2009
Christian Maeder wrote:
> B wrote:
>> I found some directions online that said that compiling from source
>> might be a good way to go. I downloaded and compiled ghc 6.10.1,
>> installing it locally.
> Next time include the extra-libraries in your sources, to avoid
> installing so many packages afterwards.
>> Ok. Now when I go to build network I get this:
>> Could not find module `Data.Generics':
>> it is a member of package base-220.127.116.11, which is hidden
>> According to google, the above message actually indicates that 'syb' is
>> needed, the bug is here:
>> - installed syb-0.1.0.0.
>> - still get the same message.
>> At this point I'm stuck!
> Are you sure you have version 18.104.22.168
> This package does not need syb as dependency.
> The file Network/URI.hs contains:
> #ifdef BASE4
> import Data.Data ( Data )
> import Data.Generics ( Data )
> and network.cabal sets the appropriate flag:
> if flag(base4)
> build-depends: base>=4
> cpp-options: -DBASE4
>> I should say that I'm using this to install all these things:
>> runhaskell Setup configure --user
>> runhaskell Setup build
>> runhaskell Setup install
>> So everything is installed 'locally' and not globally.
> This should be fine.
> HTH Christian
Thanks for the reply Christian (and the others who replied off-list).
The wrong network package was exactly the problem, for some reason I had
22.214.171.124 instead of 126.96.36.199. Also, I believe I may have had some
things left over from a previous install in ~/.ghc.
Anyway, my resolution was to delete the ghc folder from /usr/local,
delete .cabal and .ghc from ~, and start over from scratch.
Too bad this process isn't more automated! I did learn a lot along the
way, but it was a bit frustrating.
My only real question now is how one might install all this globally
rather than locally. In ubuntu I couldn't figure out how to add ghc to
my path so that sudo would pick it up. That's why I ended up with the
local install approach.
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