I tried following very simple program:
module Main where import System.Eval.Haskell
main = do i <- eval "1 + 6 :: Int" [] :: IO (Maybe Int) if isJust i then putStrLn (show (fromJust i)) else return () I compile it with "ghc -c Main.hs" and everything seems fine. When I run it with "ghc Main.o" I get following message: Main.o(.text+0x48):fake: undefined reference to `AltDataziTypeable_zdfTypeableInt_closure' Main.o(.text+0x4d):fake: undefined reference to `SystemziEvalziHaskell_eval_closure' Main.o(.text+0x36f):fake: undefined reference to `__stginit_SystemziEvalziHaskell_' Main.o(.rodata+0x0):fake: undefined reference to `SystemziEvalziHaskell_eval_closure' Main.o(.rodata+0x4):fake: undefined reference to `AltDataziTypeable_zdfTypeableInt_closure' collect2: ld returned 1 exit status When I run it with "runhaskell Main" I get:
GHCi runtime linker: fatal error: I found a duplicate definition for symbol _GHCziWord_fromEnum1_closure whilst processing object file c:/ghc/ghc-6-4-2/ghc-6.4.2/HSbase1.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.
So I did probably something totally wrong, but what?