[petsc-users] Using SLEPC: Fortran call to NEPNLEIGSSetSingularitiesFunction (similar to SNESSetFunction?)

Samuel Lanthaler s.lanthaler at gmail.com
Thu Jan 11 08:21:57 CST 2018

Amazing, thank you!

On 01/11/2018 02:48 PM, Jose E. Roman wrote:
> The Fortran stub is now in master. I have also completed the example.
> https://bitbucket.org/slepc/slepc/commits/acaefe873
> Jose
>> El 10 ene 2018, a las 17:29, Samuel Lanthaler <s.lanthaler at gmail.com> escribió:
>> Ah, I see.
>> Great, thank you, Jose!
>> Cheers,
>> Samuel
>> On 01/10/2018 05:23 PM, Jose E. Roman wrote:
>>> This function is not implemented in Fortran. I will add it and let you know.
>>> Jose
>>>> El 10 ene 2018, a las 17:11, Samuel Lanthaler <s.lanthaler at gmail.com> escribió:
>>>> Hi there,
>>>> I'm stuck getting a call to the SLEPC routine "NEPNLEIGSSetSingularitiesFunction" to work from within Fortran.
>>>> To be more precise: To get started with the solution of a non-linear eigenvalue-problem, I am first trying to write a Fortran version of slepc-3.8.1/.../nep/examples/tutorials/ex27.c, and then use it as a template for my own code. But I haven't gotten far...
>>>> Let me attach the source of the current state of my attempt to translate ex27.c to Fortran code. When trying to compile the attached source, my compiler complains:
>>>> nleigs.o: In function `MAIN__':
>>>> nleigs.f90:(.text+0x213): undefined reference to `nepnleigssetsingularitiesfunction_'
>>>> Does someone maybe see what I'm doing wrong? Do I maybe need to add a USE statement in addition to
>>>> USE slepcsys
>>>> USE slepcnep
>>>> ?
>>>> I'm quite confused about the C++ pointers and how to deal with them when calling C++ functions from Fortran, so I don't really understand what's going on here. I will greatly appreciate your help!
>>>> Thanks,
>>>> Samuel
>>>> <nleigs.f90>

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