[Haskell-cafe] compilation succeeds -- execution fails

[Bertram Felgenhauer]

Jason Dusek wrote:
>   I have a program here:
> 
>     https://svn.j-s-n.org/public/haskell/cedict
> 
>   currently at revision 302, which compiles okay but I can't get
>   it to work. I'm using the FFI to take a (currently small)
>   array and translate it into a Map.
> 
>   It compiles fine and loads fine -- but it doesn't run fine:
> 
>     GHCi, version 6.8.2: http://www.haskell.org/ghc/  :? for help
>     Loading package base ... linking ... done.
>     Prelude> import Data.Char.CEDICT
>     Prelude Data.Char.CEDICT> traditional 'a'
>     Loading package array-0.1.0.0 ... linking ... done.
>     Loading package containers-0.1.0.1 ... linking ... done.
>     Loading package parsec-2.1.0.0 ... linking ... done.
>     Loading package utf8-string-0.2 ... linking ... done.
>     Loading package cedict-0.1.1 ... linking ... <interactive>:
>     unknown symbol `___stginit_cedictzm0zi1zi1_DataziCharziCEDICTziMatter_'

This is a cabal pitfall.

Note that this is a symbol from Data.Char.CEDICT.Matter.
(The 'zi' represents a dot)

The problem is that this module wasn't packaged up in the library;
you have to list it in the  extra-modules  field in the cabal file,
along with the other used Data.Char.CEDICT.* modules.

See also
    http://hackage.haskell.org/trac/hackage/ticket/128

HTH,

Bertram