[Dune] How to use parallel linear solvers

[Dominic Kempf]

The problem could of course also lie with not including config.h, which is
where HAVE_MPI is defined.

On Tue, Jun 9, 2015 at 4:14 PM, Dominic Kempf <dominic.r.kempf at gmail.com>
wrote:

> 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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>>
>
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