C main

Simon Marlow fldrsimonmar@microsoft.com
Thu, 12 Oct 2000 02:07:45 -0700

> Greetings -
> Could someone instruct me on (or point me to) the correct ghc 
> command line
> for calling haskell from C?
> From the documentation, it seems like "ghc -fglasgow-exts 
> -no-hs-main main.c
> foo.hs" should work, but
> that still gives me a multiple definition of "main".
> I'm running ghc 4.08.1 on Windows NT.

You can use ghc just like you would use gcc to compile up your C program,
then use ghc again to link the whole program with the Haskell module(s).
The -no-hs-main flag shouldn't be necessary, as far as I can tell. eg.

	$ ghc -c main.c
	$ ghc -c HaskellStuff.hs
	$ ghc main.o HaskellStuff.o