Thanks, that fixed it.
On Aug 25, 2010 8:47 PM, "Ivan Lazar Miljenovic" <[email protected]> wrote: > On 26 August 2010 10:41, Ken Takusagawa <[email protected]> wrote: >> What am I doing wrong? >> >> module Ffi2 where >> { >> import Foreign.C.Types; >> >> foo :: CInt -> CInt; >> foo x = x; >> >> foreign export ccall foo :: CInt -> CInt; >> >> } > > Did you enable the > >> >> $ ghc -c Ffi2.hs >> >> Ffi2.hs:8:0: Invalid type signature > > You need to call it with -XForeignFunctionInterface to enable FFI methinks. > > > -- > Ivan Lazar Miljenovic > [email protected] > IvanMiljenovic.wordpress.com
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