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

Jose E. Roman jroman at dsic.upv.es
Wed Jan 10 10:23:05 CST 2018

This function is not implemented in Fortran. I will add it and let you know.

> 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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