[Dune] Issue with HAVE_MPI

[Andreas Dedner]

Hi.
Possibly you forgot to add a line like
add_dune_mpi_flags( executable-target )
to your CMakeLists.txt file?
Regards
Andreas

On 17/05/17 11:14, Benedikt Oswald wrote:
> 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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