[Haskell-cafe] Fwd: problems with hs-plugins load-eval

[Alberto G. Corona]

I have a web server which load server extensions. these extensions eval-uate
configuration files that contains code (user-editable workflow
descriptions). The problem is that I need common definitions  for the
extensions and for the configurration files. This is not permitted by
ha-plugins.

The minimal code example are the  files below. main loads eval.hs , that
evaluate a expression. The common definitions are in Include.hs. The error
is:

*GHCi runtime linker: fatal error: I found a duplicate definition for symbol
   Include_sum1_srt
whilst processing object file
   /home/magocoal/haskell/devel/votesWorkflow/src/unused/tests/Include.o
This could be caused by:
   * Loading two different object files which export the same symbol
   * Specifying the same object file twice on the GHCi command line
   * An incorrect `package.conf' entry, causing some object to be
     loaded twice.
GHCi cannot safely continue in this situation.  Exiting now.  Sorry.
*

**
Do you kno how to solve the problem while maintaining the functionality?

-------Include.hs-------
module Include where

sum [x,y]= x+y


------Main.hs-----
module Main
where

import Include
import System.Plugins

main= do
      s <-loadExec "eval.o" "mainc"
      print s

loadExec:: String-> String->IO String
loadExec file method = do

               mv <- load file ["."] [] method
               case mv of
                LoadSuccess mod v ->    v :: IO String
                LoadFailure msg   ->    return $ concat msg



------------Eval.hs--------

module Eval(mainc) where
import System.IO.Unsafe
import System.Eval.Haskell

mainc= do  i <- unsafeEval_ "sum1 [1,2]" ["Include"] [] []["."] ::  IO
(Either  [String]  Int)
           return $ show i
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