[Dune] Issue with HAVE_MPI

[Dominic Kempf]

Yes, *every* Dune executable must do so in order to have the preprocessor
defines gathered by the buildsystem.

Dominic

On Wed, May 17, 2017 at 12:31 PM, Benedikt Oswald <
benedikt.oswald at lspr.swiss> wrote:

> hello, thanks, I use
>
> ################################
> # Add MPI and ParMETIS         #
> ################################
> if(HAVE_MPI)
>     add_dune_mpi_flags(<executable-target>)
>     add_dune_parmetis_flags(<executable-target>)
> endif(HAVE_MPI)
>
>
> I assume I also must include config.h ?
>
>
> greetings, Benedikt
>
>
>
> Am 17.05.17 um 12:14 schrieb Benedikt Oswald:
> > Dear Dune,
> >
> > I understand that HAVE_MPI needs to be defined so that the MPI helper
> > can deliver a real MPI communicator object.
> >
> > While using the usual DUNE macros for configuring a project, I get
> confg.h:
> >
> >
> > /* Define if you have the MPI library.  */
> > #define HAVE_MPI ENABLE_MPI
> >
> >
> > However, when compiling my code with mpicxx (dunecontrol reports finding
> > them)
> > I obviously get an error that says that there is no MPI communicator
> > defined.
> >
> > The code only compiles if I manually add -DHAVE_MPI
> >
> > In another Dune based project, this is not the case...I obvious make a
> > stupid
> > mistake somewhere, but am at a loss at the cause of the problem.
> >
> > Would you have a suggestion ?
> >
> > thanks & greetings, Benedikt
> >
> >
> >
>
>
>
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