gmsh and libscotchmetis

[Christophe Trophime]

On Jun 8, 2011, at 7:16 PM, Anton Gladky wrote:

> Hi, Adam!
> 
>> Sounds good, thanks.  I notice you also added the interfaces you need
>> for gmsh to Bug 506033, thanks.
> Ok, done.
> 
>> For Elmer, I noticed that it could do node-wise or element-wise
>> partitioning, and just disabled the element-wise partitioning which used
>> METIS_PartMesh* functions.  Is it possible to do something similar for
>> gmsh?
> 
> I just shortly looked at the code, but it seems, that the
> functionality of metis-module will be seriously restricted, if those 2
> functions will be disabled.
> 
> Anton
> 
> 

Hi,
last week I met gmsh guys
They told me that they prefer to use metis instead of scotch because metis
provides some multiconstraint partionning...  It seems that scotch upstream has no
plan to develop such features right now.

So my feeling is that we shall disable metis support in the present version of gmsh
or consider to make a gmsh-metis package which will goto to non-free as an alternative.
This solution may be great as we can take full advantage of the latest gmsh developments.

Best
C

> 
> 
> On Tue, Jun 7, 2011 at 6:33 PM, Adam C Powell IV <hazelsct at debian.org> wrote:
>> Hi Anton,
>> 
>> Sounds good, thanks.  I notice you also added the interfaces you need
>> for gmsh to Bug 506033, thanks.
>> 
>> For Elmer, I noticed that it could do node-wise or element-wise
>> partitioning, and just disabled the element-wise partitioning which used
>> METIS_PartMesh* functions.  Is it possible to do something similar for
>> gmsh?
>> 
>> -Adam
>> 
>> On Tue, 2011-06-07 at 17:46 +0200, Anton Gladky wrote:
>>> Thanks for answers, I have uploaded a new version with disabled metis.
>>> 
>>> Anton
>>> 
>>> On Mon, Jun 6, 2011 at 8:28 PM, Adam C Powell IV <hazelsct at debian.org> wrote:
>>>> Hi Anton,
>>>> 
>>>> On Sun, 2011-06-05 at 07:29 +0200, Anton Gladky wrote:
>>>>> Hi, all!
>>>>> 
>>>>> I am trying to package gmsh 2.5.1~svn version and to fix lintian
>>>>> errors and warnings. But I have a problem with linking against
>>>>> packaged libscotchmetis. The following error appears:
>>>>> 
>>>>> Linking CXX executable gmsh
>>>>> /home/dk/gmsh/nv/upl_metis/gmsh-2.5.1~svn9373/Mesh/meshPartition.cpp:527:
>>>>> error: undefined reference to 'METIS_mCPartGraphKway'
>>>>> /home/dk/gmsh/nv/upl_metis/gmsh-2.5.1~svn9373/Mesh/meshPartition.cpp:502:
>>>>> error: undefined reference to 'METIS_mCPartGraphRecursive'
>>>>> collect2: ld returned 1 exit status
>>>> 
>>>> The scotchmetis compatibility layer is not a complete reimplementation
>>>> of METIS.  Bug 506033 requests addition of PartMesh functions; these may
>>>> also be missing.
>>>> 
>>>> I or someone else should probably forward these requests upstream and
>>>> see if there is some prospect of implementing these functions...
>>>> 
>>>> -Adam
>> --
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>> 
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