Getting constants from #defines

[Alastair Reid]

> I was expecting something like
>
>   foreign import ccall unsafe "static ncurses.h ERR" cERR :: CInt
>
> to allow me to access the value of ERR (a #define) as cERR. 

In case you're wondering _why_ this doesn't work, it's because we'd
like to be able to implement the ffi by dlopening a bunch of .o, .a
and .so files and looking up symbols in them - with no C compiler
anywhere in the picture.  IIRC, this is how ghci worked at one stage -
not sure if it still does.

--
Alastair Reid   
alastair at reid-consulting-uk.ltd.uk  
http://www.reid-consulting-uk.ltd.uk/alastair/