[Python-cgns-main] Fwd: Re: PythonCGNS

[Oliver B. <oli...@we...>]

On 01/21/2013 06:50 PM, Oliver Borm wrote:
> Hi,
>
> well I have not yet used the pythonCGNS module with cgns v3.0. So I 
> can only guess, that the cgns library (so file) is compiled with hdf5 
> support but not linked to the hdf5 library itself. Thus there are 
> missing symbols.  So either you link the cgns library itself to the 
> hdf5 library, or you link the pythonCGNS module library additionally 
> against the hdf5 library. Therefore you'll need to adapt the setup.py 
> file. Try to change the following item in line 48
>
> libraries=["cgns","hdf5"]
>
> This is not tested, so maybe the syntax or the library is different. 
> Please report any success or failure to the mailing list.


Hi

Thanks for reporting the problem.

Are you using RPM based distributions ? If yes, I could provide
you with CGNS and python-CGNS rpms if you are interested.
We have been using python-CGNS with CGNS 3 without any problem
for quite a while.
I never took some time to communicate these rpms to the Web...
(and CGNS spec file is not included in the python-CGNS sourceforge)
but I know I should !

But, as it has been mentioned by Oliver, you have to compile the CGNS
library with linking against HDF5. So, if you type "ldd libcgns.so",
you should see a dependence against HDF5, like this :

 >ldd /usr/lib64/cgns/lib/libcgns.so
         linux-vdso.so.1 =>  (0x00007fffbeb7c000)
         libhdf5.so.7 => /usr/lib64/libhdf5.so.7 (0x00007f31cb315000)
         libc.so.6 => /lib64/libc.so.6 (0x00007f31caf82000)
         libz.so.1 => /lib64/libz.so.1 (0x00007f31cad6c000)
         libm.so.6 => /lib64/libm.so.6 (0x00007f31caae7000)
         /lib64/ld-linux-x86-64.so.2 (0x000000395fe00000)

Best regards

Lionel

>
> Thx,
> Oliver
>
> Am 15.01.2013 03:28, schrieb Jorge Sancho Ponce:
>> Hello Oliver,
>>
>> First thank you for leading python-cgns code, which is very useful 
>> for us to import our meshes into 
>> Eilmer3(http://www.mech.uq.edu.au/cfcfd/eilmer3.html).
>>
>> Python-cgnslinked with cgns version 2.5 worked correctly, but now 
>> with 3.1 and hdf5 give us this error when executing the tutorials:
>>
>> "ImportError: /usr/local/lib/libcgns.so.3.1: undefined symbol: 
>> H5T_NATIVE_SCHAR_g"
>>
>> Seems that cgns library works ok by itself, since runs tests in hdf5 
>> format. Sorry for our lack of knowledge, do you know where this error 
>> may be pointing?
>>
>>
>> thank you very much
>> jorge sancho
>> postgraduate student
>> Centre for hypersonics, UQ
>
>
>
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