[Paraview] Compilation error under Linux with MPI and Python

[Orion Poplawski]

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.


-- 
Orion Poplawski
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