[petsc-users] Petsc DMLabel Fortran Stub request

[Nicholas Arnold-Medabalimi]

Hi Matthew

Thanks for checking in on this. Fortunately, I was able to get the behavior
I needed through alternate means so I probably wouldn't investigate doing
this further.

Sincerely
Nicholas

On Mon, Mar 27, 2023 at 8:49 PM Matthew Knepley <knepley at gmail.com> wrote:

> On Fri, Jan 6, 2023 at 10:03 AM Nicholas Arnold-Medabalimi <
> narnoldm at umich.edu> wrote:
>
>> Hi Petsc Users
>>
>
> I apologize. I found this email today and it looks like no one answered.
>
>
>> I am trying to use the sequence of
>> call DMLabelPropagateBegin(synchLabel,sf,ierr)
>> call
>> DMLabelPropagatePush(synchLabel,sf,PETSC_NULL_OPTIONS,PETSC_NULL_INTEGER,ierr)
>> call DMLabelPropagateEnd(synchLabel,sf, ierr)
>> in fortran.
>>
>> I apologize if I messed something up, it appears as if the
>> DMLabelPropagatePush command doesn't have an appropriate Fortran interface
>> as I get an undefined reference when it is called.
>>
>
> Yes, it takes a function pointer, and using function pointers with Fortran
> is not easy, although it can be done. It might be better to create a C
> function with some default marking and then wrap that. What do you want to
> do?
>
>   Thanks,
>
>      Matt
>
>
>> I would appreciate any assistance.
>>
>> As a side note in practice, what is the proper Fortran NULL pointer to
>> use for void arguments? I used an integer one temporarily to get to the
>> undefined reference error but I assume it doesn't matter?
>>
>>
>> Sincerely
>> Nicholas
>>
>> --
>> Nicholas Arnold-Medabalimi
>>
>> Ph.D. Candidate
>> Computational Aeroscience Lab
>> University of Michigan
>>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
> https://www.cse.buffalo.edu/~knepley/
> <http://www.cse.buffalo.edu/~knepley/>
>


-- 
Nicholas Arnold-Medabalimi

Ph.D. Candidate
Computational Aeroscience Lab
University of Michigan
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