Deprecated Packages Being Removed

[sebrowne]

As of 11/24 all deprecated packages have been removed from the develop branch

The master branch will soon follow with the next master merge process from the develop branch (~11/28)

As the configure and build-time warnings have indicated for some time now, Trilinos has scheduled removal of the Epetra-based packages for 2025. The time is now upon us to remove the deprecated packages.

We are planning on releasing v16.2.0 of the code immediately prior to merging that PR, with 17.0.0rc0 following that PR. Trilinos 16.2.0 will be the last release to include the deprecated packages. Trilinos 17.0.0rc0 will remove all capability related to the deprecated packages, but will otherwise be functionally identical to 16.2.0.

17.0.0rc0/16.2.0 are tentatively planned for 2025/11/24

This announcement serves as a place for any discussion that is not relevant to the Pull Request itself.

[alanw0]

What is the intended timeframe for releasing 16.2 and 17.0?
I'm just considering whether we want to try to get a stk update into either of those.
Thanks!

[sebrowne]

Good catch, I added the anticipated date (2025/10/21) to the announcement. Thanks Alan!

[ccober6]

The hope is the only difference between 16.2 and 17.0 is the Epetra removal, thus we will want to have these to be very close in time without any other commits. The biggest time delay between them might be the completion of a master merge, if deemed necassary.

[alanw0]

ok, yes that makes sense. So any stk update will be before 16.2 or after 17.0. No problem. And October is far enough out for good planning. Thanks!

[ccober6]

Hi all,

Just wanted to add some details related to the delay. There are three things we wanted to happen with 17.0

• c++20 (could use another week or two to ensure everything is working)
• Epetra removal (a couple packages and applications are not quite ready, but could use a few weeks)
• Kokkos 5.0 (a candidate release is imminent and should be ready in the next week or two)

Given these needs and trying to avoid conflicts with Sandia TUG Day and SC25, we decided to postpone the release until the 11/24/2025 timeframe (+/-3 days). We are working through the mechanics of having three releases in the short time (16.2, 17.0rc?, and 17.0), so the exact final date has not been determined. However we should make it clear that we do not expect another delay, so everyone should consider this timeframe as firm, and plan accordingly.

If you have any questions, please let us know.

Thanks,
Curt

[ccober6]

Hi all,

As part of a major release (e.g., 17.0), Trilinos policy allows developers an opportunity to break backward compatibility. Given that the 17.0 release is a little more complex than normal, we would like to ask developers let the @trilinos/framework know of PRs that break backward compatibility and should be part of the major release, 17.0.

Thanks Curt

[achauphan]

Each deprecated package now has their own GitHub repository. These will be archived to be read-only.

Package	Repo link
Amesos	https://github.com/trilinos/Amesos
AztecOO	https://github.com/trilinos/AztecOO
Epetra	https://github.com/trilinos/Epetra
EpetraExt	https://github.com/trilinos/EpetraExt
Ifpack	https://github.com/trilinos/Ifpack
Intrepid	https://github.com/trilinos/Intrepid
Isorropia	https://github.com/trilinos/Isorropia
ML	https://github.com/trilinos/ML
NewPackage	https://github.com/trilinos/New_Package
Pliris	https://github.com/trilinos/Pliris
PyTrilinos	https://github.com/trilinos/PyTrilinos
ShyLU_DDCore	https://github.com/trilinos/ShyLU_DDCore
ThyraEpetraAdapters	https://github.com/trilinos/ThyraEpetraAdapters
ThyraEpetraExtAdapters	https://github.com/trilinos/ThyraEpetraExtAdapters
Triutils	https://github.com/trilinos/Triutils/

[sebrowne]

Trilinos 16.2.0 and 17.0.0rc0 have been released including and excluding the deprecated packages respectively. The deprecated packages have been removed from the develop branch and individual archives of all removed packages have been generated. This work is now completed!