[Paraview] Compilation error under Linux with MPI and Python

[Armin Wehrfritz]

The problem actually occurs only for openmpi versions > 1.6, I 
successfully compiled now ParaView under openSUSE 12.3 (openmpi 1.6).

I also found a quick-and-dirty, workaround for openmpi 1.7.2 by manually 
adding libdl to the libraries in CMakeCache.txt:
> MPI_CXX_LIBRARIES:STRING=/usr/lib64/mpi/gcc/openmpi/lib64/libmpi_cxx.so;/usr/lib64/mpi/gcc/openmpi/lib64/libmpi.so;/usr/lib64/libdl.so
> MPI_C_LIBRARIES:STRING=/usr/lib64/mpi/gcc/openmpi/lib64/libmpi.so;/usr/lib64/libdl.so

Maybe a ParaView developer can add libdl to the linking targets for 
mpi4py to fix the problem properly.

-Armin


On 02/06/2014 05:02 AM, Orion Poplawski wrote:
> On 02/05/2014 01:14 PM, Armin Wehrfritz wrote:
>> Hi,
>>
>> I get this error when compiling Paraview 4.1.0 under Linux x64:
>>
>>> [  230s] CMakeFiles/mpi4py.MPI.dir/src/MPI.c.o: In function
>>> `OPENMPI_dlopen_libmpi':
>>> [  230s] MPI.c:(.text+0x6eb1): undefined reference to `dlopen'
>>> [  230s] MPI.c:(.text+0x6ecd): undefined reference to `dlopen'
>>> [  230s] MPI.c:(.text+0x6ee3): undefined reference to `dlopen'
>>> [  230s] MPI.c:(.text+0x6ef9): undefined reference to `dlopen'
>>> [  230s] CMakeFiles[  4%] /mpi4py.MPI.dir/src/MPI.c.o: In function
>>> `__pyx_pf_6mpi4py_3MPI_16Init':
>>> [  230s] MPI.c:(.text+0x1349b): undefined reference to `dlopen'
>>> [  230s] CMakeFiles/mpi4py.MPI.dir/src/MPI.c.o:MPI.c:(.text+0x135bd):
>>> more undefined references to `dlopen' follow
>>> [  230s] collect2: error: ld returned 1 exit status
>>> [  230s] make[2]: *** [lib/site-packages/mpi4py/MPI.so] Error 1
>>> [  230s] make[1]: ***
>>> [ThirdParty/mpi4py/vtkmpi4py/CMakeFiles/mpi4py.MPI.dir/all] Error 2
>>> [  230s] make[1]: *** Waiting for unfinished jobs....
>>
>> The error seems related to newer versions of openmpi in combination with
>> and Python.
>> When compiling under openSUSE 12.2 (openmpi 1.5.4) everything works
>> fine, but under openSUSE 12.3 (openmpi 1.6) and openSUSE 13.1 (openmpi
>> 1.7.2) the compilation fails.
>>
>> Apparently, in newer versions of openmpi, the wrapper doesn't add '-ldl'
>> anymore to the linker flags.
>> See also here:
>> https://svn.open-mpi.org/trac/ompi/ticket/3103
>>
>> I'm not sure if this should be fixed in openmpi or paraview, but I would
>> appreciate any hint on how to fix it.
>>
>> Best regards,
>> Armin
>
> It needs to be fixed in paraview - it bundles mpi4py, and mpi4py uses
> dlopen(), so mpi4py needs to be linked to -ldl.  Not sure the
> appropriate way to fix that in paraview though.
>
>