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#package-databases
> 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
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"
>---cut here---
compiles without error. Just that one little piece of information,
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
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