[petsc-dev] print statements in fortran interface functions

[Mark Adams]

On Mon, Mar 16, 2020 at 10:04 PM Satish Balay <balay at mcs.anl.gov> wrote:

> Wrt fortran I/O - you can try adding calls to flush() after that.
> Similarly C has fflush()
>

This is in zmatnestf.c. So C code that is the fortran stubs. Custom in this
case.

>
> Satish
>
>
> On Mon, 16 Mar 2020, Mark Adams wrote:
>
> > I am trying to debug an application code that works with v3.7 but fails
> > with master. The code works for "normal" solvers but for a solver that
> uses
> > FieldSplit it fails. It looks like vectors are not getting created from
> > MatCreateVecs with a matrix that is a MatNest (I can't run the code).
> >
> > I have put print statements in the interface files to try to see what is
> > going on but the print statements seem to disappear somehow. (I added the
> > same print statements in my installation of v3.7 to see what is
> different)
> > I was using PetscPrint and then found and example of a Fortran PetscInfo
> > and switched to that. I stepped through the code with DDT and see the
> print
> > statements but nothing goes to the output. I did this DDT stuff with
> > ex73f90t, which has a MatCreateNest.
> >
> > I am completely baffled. Does anyone have any ideas?
> >
> > Thanks,
> > Mark
> >
>
>
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