I am having problems with the GHC FFI, I am using GHC version 5.04.1 and am trying to compile the sample code given on 

the web site

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module Foo where

foreign export ccall foo :: Int -> IO Int

foo :: Int -> IO Int

foo n = return (length (f n))

f :: Int -> [Int]

f 0 = []

f n = n:(f (n-1))

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when I enter

c:/ghc M.hs 

to compile the code I get the following error

M.hs:5: Type signature given for an expression

I have tried compiling the code using GHC 5.04.1 on windows 98, XP and on Linux any help on would be 

greatly appreciated.

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David Abbs 3rd year Undergraduate in Computer Science 

at the University Of Sheffield

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u0da2@dcs.shef.ac.uk

Have a very nice day !!