[petsc-users] PetscFECreateDefault in Fortran

[Justin Pogacnik]

?All good. Thanks Matt. Will keep an eye out for that update. :)


-Justin

________________________________
From: Matthew Knepley <knepley at gmail.com>
Sent: Friday, June 2, 2017 12:52 AM
To: Justin Pogacnik
Cc: petsc-users at mcs.anl.gov
Subject: Re: [petsc-users] PetscFECreateDefault in Fortran

On Wed, May 31, 2017 at 10:00 PM, Justin Pogacnik <j.pogacnik at auckland.ac.nz<mailto:j.pogacnik at auckland.ac.nz>> wrote:

Thanks Matt! That works perfectly now. I have another question regarding accessing the quadrature information.


When I use PetscFEGetQuadrature(), then PetscQuadratureView(), I see what I expect regarding point locations, weights.


However, when I try to use PetscQuadratureGetData() the pointers seem to point to random memory locations.


The exact line from my test problem is: call PetscQuadratureGetData(quad,q_nc,q_dim,q_num,pq_points,pq_weights,ierr);

where the pq_* are the pointers giving strange output. The q_nc, q_dim, and q_num are all giving what I would expect to see.

You are clearly the first Fortran user interested in this stuff ;) Handling of arrays in Fortran demands some more work
from us. I need to write a wrapper for that function. I will do it as soon as I can.

  Thanks,

    Matt

Happy to send along the file if that helps.


Thanks again,


Justin

________________________________
From: Matthew Knepley <knepley at gmail.com<mailto:knepley at gmail.com>>
Sent: Thursday, June 1, 2017 1:34 AM
To: Justin Pogacnik
Cc: petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] PetscFECreateDefault in Fortran

On Wed, May 31, 2017 at 7:53 AM, Matthew Knepley <knepley at gmail.com<mailto:knepley at gmail.com>> wrote:
On Tue, May 30, 2017 at 10:19 PM, Justin Pogacnik <j.pogacnik at auckland.ac.nz<mailto:j.pogacnik at auckland.ac.nz>> wrote:

Hello,

I'm developing a finite element code in fortran 90. I recently updated my PETSc and am now getting the following error during compile/linking on an existing application:

Undefined symbols for architecture x86_64:

  "_petscfecreatedefault_", referenced from:

      _MAIN__ in fe_test.o

ld: symbol(s) not found for architecture x86_64

collect2: error: ld returned 1 exit status

make: *** [dist/fe_test] Error 1


I'm running Mac OS X Yosemite (10.10.5). I've created a "minimum working example" (attached) that re-creates the problem. It's basically just dm/impls/plex/examples/tutorials/ex3f90, but tries to create a PetscFE object. Everything goes fine and the DM looks like what is expected if PetscFECreateDefault is commented out. Any idea what am I missing?

Yes, I had not made a Fortran binding for this function. I will do it now.

I have merged it to the 'next' branch, and it will be in 'master' soon.

  Thanks,

     Matt

  Thanks,

     Matt

Many thanks!

Justin






--
What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
-- Norbert Wiener

http://www.caam.rice.edu/~mk51/



--
What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
-- Norbert Wiener

http://www.caam.rice.edu/~mk51/



--
What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
-- Norbert Wiener

http://www.caam.rice.edu/~mk51/
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