On 10/21/08 07:35, Bertram Felgenhauer wrote:
Larry Evans wrote:
On 10/20/08 12:33, Larry Evans wrote:
With a file containing:
module Main where
import Array import Control.Functor.Fix I get: make ghc -i/root/.cabal/lib/category-extras-0.53.5/ghc-6.8.2 -c catamorphism.example.hs
Yes, using -i to give paths to installed packages does not work - you really have to tell ghc about the corresponding package.conf file, using -package-conf file. See also
http://www.haskell.org/ghc/docs/latest/html/users_guide/packages.html#packag...
catamorphism.example.hs:19:0: Bad interface file: /root/.cabal/lib/category-extras-0.53.5/ghc-6.8.2/Control/Functor/Fix.hi Something is amiss; requested module main:Control.Functor.Fix differs from name found in the interface file category-extras-0.53.5:Control.Functor.Fix make: *** [all] Error 1
The problem is that all modules found by -i are expected to be in the current package - which is 'main' by default. (Build tools like Cabal specify a different package name for libraries; for example the Control.Functor.Fix is in the 'category-extras-0.53.5' package here.)
So, I've got to figure how to tell cabal install to install in right place :(
Have you tried 'cabal install --global'? To make it stick, put 'user-install: False' in root's .cabal/config file.
HTH,
Bertram
---cut here--- compiles without error. Just that one little piece of information,
THANK YOU! I finally understand what happened. To manually install cabal-install, I had to change to root. I just assumed I had to stay as root to install category-extras. Since the default for |cabal install| was --user, it put the files in /root/.cabal. I just did |cabal install category-extras| as myself and now: <---cut here --- module Main where import Data.Generics.Biplate import Control.Functor.Fix main = do putStr "hello world\n" that |cabal install| , by default, installs in ~/.cabal and then enables ghc to look there for packages, would have saved an awful lot of time :( -regards, Larry