This is a linking issue. It seems GHC 7 automatically feeds the
linker SimpleJSON.o so when you explicitly provide it too then you get
those conflicts. All you need to do is call:
> ghc -o simple Main.hs
Unless you're using GHC 6, then the original command is correct:
> ghc -o simple Main.hs S
On Wed, Aug 17, 2011 at 10:37 AM, Paul Reiners wrote:
> I'm trying to do the following from Chapter 5 of "Real World Haskell":
>
> Our choice of naming for the source file and function is deliberate. To
> create an executable, ghc expects a module named Main that contains a
> function named main.
I'm trying to do the following from Chapter 5 of "Real World Haskell":
Our choice of naming for the source file and function is deliberate. To
create an executable, *ghc* expects a module named Main that contains a
function named main. The main function is the one that will be called when
we run t
