[MLton-user] Problem CallingFromCToSML

[Rodrigo Saad]

Thank you very much Mr. Matthew, it worked right away.

Rodrigo Saad


On Fri, Jun 19, 2009 at 4:43 PM, Matthew Fluet<fluet at tti-c.org> wrote:
> On Fri, 19 Jun 2009, Rodrigo Saad wrote:
>>
>> I am trying to reproduce the example provided at the page
>> http://mlton.org/CallingFromCToSML without lucky.
>> I am getting the following error:
>> %% mlton -default-ann 'allowFFI true' export.sml ffi-export.o
>> /tmp/fileCdFGgC.o: In function `L_7':
>> (.text +0x1f80): undefined reference to `MLton_FFI_Int8'
>> collect2: ld returned 1 exit status
>> call to system failed with exit status 1:
>> gcc -o export /tmp/fileK4YlnF.o /tmp/fileCdFGgC.o ffi-export.o
>> -L/usr/lib/mlton/self -lmlton -lgdtoa -lm -lgmp
>>
>> I have been looking over the web for this error and i haven't found
>> anything useful.
>> Any help is appreciated.
>
> In mlton-20070826, there was a bug in the implementation of _export-ed
> functions using the char type, leading to the linker error:
>  http://mlton.org/Bugs20070826
>  http://mlton.org/pipermail/mlton-user/2007-August/001174.html
>  http://mlton.org/pipermail/mlton-user/2007-September/001175.html
>
> You can apply the patch described in the last link (to
> /usr/lib/mlton/sml/basis/ffi.sml or /usr/local/lib/mlton/sml/basis/ffi.sml,
> depending on your platform).
>