[Dune] error running code with MPI

[Vogelbacher Florian]

The safe side did work and finally I can run parallel jobs smoothly.
So much thanks to your help!

Yours
Florian

Christian Engwer wrote:
> On Fri, Sep 03, 2010 at 06:27:31PM +0200, Vogelbacher Florian wrote:
>> Hi Christian,
>>
>> I just made a distclean and recompiled with this flag to make sure
>> it is everywhere "seen". The bug is however still there. Do I have
>> to recompile all other packages (ALUGrid, metis, ...) with this kind
> 
> I'm not sure about ALUGrid. But you will be on the safe side!
> 
> Christian
> 
>> of flag as well?
>>
>> I wish you and the Dune-Team a wonderful weekend.
>> Florian
>>
>> Christian Engwer wrote:
>>> Hi Florian,
>>>
>>>> no, I did not use this kind of flag :-)
>>>>
>>>> I'm using an opts file to compile dune. Do I have to include it into
>>>> the CXXFLAGS or somewhere else as well?
>>> OK, this _might_ be the reason for your strange bugs. The problem is,
>>> that DUNE does break strict aliasing.
>>>
>>>> dune.opts.file:
>>>>
>>>> CONFIGURE_FLAGS="CXX='mpicxx' CC='mpicc' LD='mpicxx'
>>>> CXXFLAGS='-DMPICH_IGNORE_CXX_SEEK -O2'
>>>> CPPFLAGS='-DMPICH_IGNORE_CXX_SEEK -O2'
>>>> LDFLAGS=' '
>>>>          --disable-documentation
>>>>          --enable-parallel
>>>>          --enable-debug-output
>>>>          --with-boost='$HOME/extlib-scratch3-felsim/boost-trunk'
>>>>          --with-metis='$HOME/extlib-scratch3-felsim/metis-4.0'
>>>>          --with-rlog='$HOME/extlib-scratch3-felsim/rlog-1.4'
>>>>          --with-alugrid='$HOME/extlib-scratch3-felsim/ALUGrid-1.22'"
>>> Yes, you have to add it to the CXXFLAGS listed in the CONFIGURE_FLAGS.
>>>
>>> Btw. DUNE tries to support MPI without the need to invoke the mpi
>>> compiler directly. It detects quite a range of MPI compilers and
>>> extract the CXXFLAGS and the LDFLAGS. In this case it would be
>>> sufficient to use CXX='g++-4.3' or what ever compiler you want to use
>>> and specify the mpi compiler as MPICC=/path-to-mpi/mpicc. If DUNE
>>> doesn't detect your MPI compiler correctly, it would be great if you
>>> could help us adding support for this mpi version.
>>>
>>> Hope it works now :-)
>>> Christian

-- 
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Paul Scherrer Institut
Florian Vogelbacher
WBCA/004
5232 Villigen PSI
Switzerland

Mail: 	Florian.Vogelbacher at psi.ch
Phone:	+41 (0) 563105019
Web:	www.psi.ch
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