Hal Daume III <[EMAIL PROTECTED]> wrote, > Two things. First, you need a module name. So prefix your code with > 'module Foo where'. Secondly, the call to ghc needs -fglasgow-exts to > pick up the necessary extensions.
For the FFI, better use -ffi (instead of the all encompassing -fglasgow-exts) - this is, from GHC 5.04 onwards. Manuel > On 19 Oct 2002, [ISO-8859-1] Jo�o Ferreira wrote: > > > Hello all, > > > > I am trying to learn how to use FFI with GHC. I've tried the example in > > GHC's user's guide but it didn't worked. Here it is: > > > > > > 1) The haskell code > > =================== > > > > [bracaman@tucano hib]$ cat foo.hs > > 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)) > > > > 2) The error > > ============ > > > > [bracaman@tucano hib]$ ghc -c foo.hs > > foo.hs:3: Type signature given for an expression > > [bracaman@tucano hib]$ > > > > > > I just can't understand why this is happening... can someone, please, > > help? > > > > Thank you in advance, > > Jo�o Ferreira _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
