[petsc-dev] petsc4py, TAO, and complex scalars

Barry Smith bsmith at mcs.anl.gov
Fri Jul 11 13:04:12 CDT 2014

   There are a truck load of complex related errors in tao in next: http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2014/07/10/filtered-make_next_arch-freebsd-cxx-cmplx-pkgs-dbg_wii.log  see also the other complex builds at http://ftp.mcs.anl.gov/pub/petsc/nightlylogs/archive/2014/07/10/next.html

  not sure if they are related to your change


On Jul 8, 2014, at 8:57 AM, Lisandro Dalcin <dalcinl at gmail.com> wrote:

> On 8 July 2014 15:16, Matthew Knepley <knepley at gmail.com> wrote:
>> On Tue, Jul 8, 2014 at 2:09 PM, Lisandro Dalcin <dalcinl at gmail.com> wrote:
>>> Some time ago I merged tao4py in petsc4py following PETSc. Now I
>>> realize that TA0 is not available for --with-scalar-type=complex, all
>>> of the TAO API is not built. Adding support for this case in petsc4py
>>> will be rather involved, so I want to propose an alternative.
>>> I have a rather small patch that enables the compile of interface TAO
>>> APIs.  With this patch, I can build petsc4py, but obviously any
>>> attempt of use a specific TAO solver type fails at runtime because the
>>> solve implementations are not registered. But at least, petsc4py can
>>> be built with complex scalars and all other PETSc components can be
>>> used normally.
>>> What do you think? If you accept this proposal, I'll put all this in a
>>> branch for review. Additionally, I would like to merge this fix into
>>> maint.
>> That sounds fine to me. We will fix this for the next release, so it would
>> just hang around until then.
> https://bitbucket.org/petsc/petsc/branch/dalcinl/tao-complex_scalars
> This hook is a hack, but seems the easiest way to support complex scalars:
> https://bitbucket.org/petsc/petsc/commits/a62a097f5bb5c39fb23ca6e1f9f37f7c197bfa6d?at=master#Lsrc/tao/matrix/lmvmmat.cT5
> Please review,
> -- 
> Lisandro Dalcin
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