Re: Adding Trilinos to dealii package

[Paul Garlick <pgarlick@tourbillion-technology.com>]

Dear Paul,

> I would like to eventually package the Lethe CFD library

Nice!

Trilinos has many bells and whistles. I imagine that there will be some
significant effort required to package it.  One option would be to
subdivide the library and initially package only the elements you need
for Lethe.  See the Debian approach to packaging Trilinos for example
[1].

If Lethe does not use PETSc there would be no risk of conflict.  The
choice between including the new Trilinos (sub)package as a dependency
of dealii and dealii-openmpi or creating new dealii-trilinos and
dealii-trilinos-openmpi packages would be marginal.  How many models
need to use PETSc and Trilinos at the same time?

> This assumes people won't mind having to build Trilinos as a
> dependency for dealii even if they don't need it.

The model run times are usually very much longer than the library build
times.  I expect this would be true for Trilinos and Lethe too.

Best regards,

Paul.

[1]: https://packages.debian.org/source/buster/trilinos