> What is the politically correct way using the FFI and ghc5.03
> (which I have just managed to compile from
> CVS) to import an externally defined object (not a function)?
> I have a source file containing the line
>
> foreign label "default_options" defaultOptions :: CString.CString
>
> for which ghc5.03 complains about "Warning: foreign
> declaration uses deprecated non-standard syntax",
> but which works anyway. However in my attempt to be a good
> little ghc user, I try instead
>
> foreign import "default_options" defaultOptions :: CString.CString
>
> (after deciphering with difficulty the Postscript version of
> the FFI document on this screen) but
> still get the deprecated warning. Then I try
>
> foreign import ccall "default_options" defaultOptions ::
> CString.CString
I believe you meant to say
foreign import ccall "&default_options"
defaultOptions :: CString.Cstring
:-) (see the latest FFI addendum at http://www.cse.unsw.edu.au/~chak/haskell/ffi/)
Cheers,
Simon
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