[Haskell-cafe] FunPtr error?

[Galchin, Vasili]

If I change

     data Sigval = SivalInt Int | SivalPtr (Ptr Char)
to ...

    newtype Sigval = Sivalint Int | SivalPtr (Ptr Char)

then my test case builds and links. ??


Regards, Vasili




On Mon, Jun 9, 2008 at 11:01 PM, Galchin, Vasili <vigalchin at gmail.com>
wrote:

> I have tried various things to no avail ....
>
> vigalchin at ubuntu:~/FTP/Haskell/unix-2.2.0.0/tests/timer$ runhaskell
> Setup.lhs build
> Preprocessing executables for Test-1.0...
> Building Test-1.0...
> [1 of 1] Compiling Main             ( ./timer.hs,
> dist/build/timer/timer-tmp/Main.o )
>
> ./timer.hs:22:0:
>     Unacceptable argument type in foreign declaration: Sigval
>     When checking declaration:
>         foreign import ccall safe "wrapper" mkNotify
>           :: Notify -> IO (FunPtr Notify)
>
> => here is my Sigval def
>
> data Sigval = SivalInt Int | SivalPtr (Ptr Char)
>
> I did a find/grep for "Unacceptable argument" in the ghc compiler source
> and assuming no typo I didn't find. ??
>
> Thanks.
>
> Kind regards, Vasili
>
>
>
>
>  On Mon, Jun 9, 2008 at 11:25 PM, Judah Jacobson <judah.jacobson at gmail.com>
> wrote:
>
>> 2008/6/9 Galchin, Vasili <vigalchin at gmail.com>:
>> > Ryan,
>> >
>> >      I tried but the compiler didn't seem to like the keyword "import":
>> >
>> > vigalchin at ubuntu:~/FTP/Haskell/unix-2.2.0.0/tests/timer$ runhaskell
>> > Setup.lhs build
>> > Preprocessing executables for Test-1.0...
>> > Building Test-1.0...
>> > [1 of 1] Compiling Main             ( ./timer.hs,
>> > dist/build/timer/timer-tmp/Main.o )
>> >
>> > ./timer.hs:29:8: parse error on input `import'
>> >
>>
>> Hi Vasili,
>>
>> To fix that error, you probably just need to add the line "Extensions:
>> ForeignFunctionInterface" to the .cabal file.   (That is the
>> equivalent of calling ghc by itself with the command-line arguments
>> -fffi or -XForeignFunctionInterface.)
>>
>> Hope that helps,
>> -Judah
>>
>
>
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