[Haskell-cafe] Re: ghc error: requested module name differs from name found in interface file

[Larry Evans]

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
>  >
>  > 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
> I used cabal to install category-extras:
> 
>  > /home/evansl/download/haskell/libs # cabal install category-extras
>  > Resolving dependencies...
>  > Downloading category-extras-0.53.5...
>  > Configuring category-extras-0.53.5...
>  > Preprocessing library category-extras-0.53.5...
> ...
>  > /usr/bin/ar: creating dist/build/libHScategory-extras-0.53.5.a
>  > Installing library in /root/.cabal/lib/category-extras-0.53.5/ghc-6.8.2
[snip]
The problem must be where the library was installed.  A manual install:

  http://www.haskell.org/haskellwiki/Cabal/How_to_install_a_Cabal_package

of http://hackage.haskell.org/cgi-bin/hackage-scripts/package/uniplate
followed by compile of:
<--- cut here ---
module Main where

import Data.Generics.Biplate

main = do
   putStr "hello world\n"

 >--- cut here ---
showed no errors:
<--- cut here ---
make
ghc  -C import.test.hs

Compilation finished at Mon Oct 20 18:47:54
 >--- cut here ---

The key difference is the manual installed as:
<--- cut here ---
/home/evansl/download/haskell/libs/uniplate-1.2.0.1 # runhaskell Setup 
install
Installing library in /usr/local/lib/uniplate-1.2.0.1/ghc-6.8.2
Registering uniplate-1.2.0.1...
Reading package info from "dist/installed-pkg-config" ... done.
Saving old package config file... done.
Writing new package config file... done.
/home/evansl/download/haskell/libs/uniplate-1.2.0.1 #
 >--- cut here ---
whereas the cabal install of category-extras installed the library here:
<--- cut here ---
   /root/.cabal/lib/category-extras-0.53.5/ghc-6.8.2:
   total used in directory 2812 available 148773984
   drwxr-xr-x 4 root root    4096 Oct 19 15:09 .
   drwxr-xr-x 3 root root    4096 Oct 19 15:09 ..
   drwxr-xr-x 9 root root    4096 Oct 19 15:09 Control
   drwxr-xr-x 2 root root    4096 Oct 19 15:09 Data
   -rw-r--r-- 1 root root 1120345 Oct 19 15:09 HScategory-extras-0.53.5.o
   -rw-r--r-- 1 root root 1728590 Oct 19 15:09 libHScategory-extras-0.53.5.a
 >--- cut here ---

So, I've got to figure how to tell cabal install to install in right
place :(