[Dune] How to use parallel linear solvers

[Dominic Kempf]

Hey Tobias,

The problem is that with our current build system, external packages like
MPI need not only to be found but also explicitly enabled in order to be
used. You can do this in your CMakeLists.txt file by adding:

add_dune_mpi_flags(targetname)

Note, that we are aiming to change this errorprone behaviour and to
auto-enable all packages by default. Using git master you can instead use
the macros from dune-common/cmake/modules/DuneEnableAllPackages.cmake

Best,
Dominic

On Tue, Jun 9, 2015 at 4:03 PM, Tobias Ritschel <tobiasritschel at gmail.com>
wrote:

> Hi
>
> I am trying to implement a parallel linear solver using ISTL. For that I
> need to use the *OwnerOverlapCopyCommunication *class. I include
>
> #include <dune/istl/owneroverlapcopy.hh>
>
> and when I try to compile I get the following error
>
> /home/tobias/Documents/OPM_Optimization/src/OPMSim.cpp:556:52: error:
> 'OwnerOverlapCopyCommunication' is not a member of 'Dune'
>
> From *owneroverlapcopy.hh* it seems that the *OwnerOverlapCopyCommunication
> *is only defined if HAVE_MPI is defined. I believe that the solution is
> to change the cmake files. I am currently using cmake files copied from
> opm-autodiff and haven't been able to find anything which searches for MPI.
>
> Is it correct that this is what is causing the compilation error and could
> you point me towards a solution?
>
> Kind regards
> Tobias Ritschel
>
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