[petsc-dev] [petsc-maint] Updating PETSc to support Elemental 0.80

[Jack Poulson]

On Sun, Jun 16, 2013 at 1:24 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> Jack Poulson <jack.poulson at gmail.com> writes:
>
> >
> > What is going on with the parmetis CMakeLists.txt?
> >
> https://bitbucket.org/petsc/pkg-parmetis/src/1c1a9fd0f408dc4d42c57f5c3ee6ace411eb222b/CMakeLists.txt?at=master
> >
> > It seems to be completely broken. If so, shouldn't it be removed?
>
> I think CMakeLists.txt was mainly set up for use by
> $PETSC_DIR/config/PETSc/packages/parmetis.py, but the modifications seem
> to have mainly been to use METIS and GKlib without the hack of
> symlinking in the build directory.
>
> > Am I supposed to be separately checking out pkg-metis if I want to use
> > pkg-parmetis?
>
> No, but it expects METIS to be built (and specified using METIS_PATH; it
> looks like a bug in parmetis.py that it can link the wrong libmetis.so).
>
> > Should we be having this discussion on petsc-dev instead?
>
> Yes, moving the thread and Cc'ing people who may be interested.
>

I have been experimenting with having Clique checkout both pkg-metis and
pkg-parmetis as part of its build system and it seems that a few things
need to be added to the parmetis CMakeLists.txt for it to function
correctly (please correct me if I am missing something!).

The two main problems are the inclusion of gklib_tls.h and gklib_defs.h,
where the former is generated by the metis build system, usually in
metis/include in the installation directory, and the latter is is in
metis/libmetis/ in the source directory. While setting METIS_PATH to the
metis installation directory would pick up gklib_tls.h since
${METIS_PATH}/include is added to the include directories of the parmetis
CMakeLists.txt, I do not see any corresponding include_directories
statement for the libmetis directory containing gklib_defs.h. Furthermore,
I'm not sure if a sufficient number of headers are installed by metis for
the parmetis build to succeed if METIS_ROOT is set to the installation
directory (but I could be wrong).

Jack
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