CMake

• Change the default for Trilinos_MUST_FIND_ALL_TPL_LIBS from OFF to ON. It was turned off by default because it breaks backward compatibility but it also causes problems for new users and new configurations.

  Users that do not want this new behavior can set -D Trilinos_MUST_FIND_ALL_TPL_LIBS=OFF, which is backward compatible.

• Change the default for Trilinos_USE_GNUINSTALLDIRS from OFF to ON, in the goal to move Trilinos and TriBITS to modern CMake.

  TriBITS has had the ability to use that paths selected by the standard CMake module GNUInstallDirs.cmake for a long time. But it is turned off in TriBITS by default and was never turned on in Trilinos, both for the sake of backward compatibility.

  This may break people's existing configurations because it will install libs in <prefix>/libs64/ instead of in <prefix>/libs/ on many systems (e.g. Linux systems). For example, this will break downstream CMake projects that call find_package(Trilinos ...) before defining the compilers (e.g. so they can get the compilers from Trilinos). If the compilers are not defined, find_package() will not search <prefix>/lib64. To revert back to using <prefix>/lib but still use GNUInstallDirs.cmake for Trilinos, set -D CMAKE_INSTALL_LIBDIR:STRING=lib when configuring Trilinos. To avoid the find_package(Trilinos ...) problem not searching <prefix>/lib64, consider explicitly specifying the compiler to and having the downstream CMake project define the compilers first with project(<ProjectName> COMPILERS C CXX ...) before calling find_package(Trilinos ...). (That is, don't try to get the compilers from the installed Trilinos, see https://github.com/trilinos/Trilinos/issues/12306.)

  NOTE: The setting -D Trilinos_USE_GNUINSTALLDIRS=OFF is deprecated and may be removed in the future. (I.e. the usage of GNUInstallDirs.cmake may be hard-coded in the future so please try adjusting to the usage of GNUInstallDirs.cmake by Trilinos.) See https://github.com/trilinos/Trilinos/issues/12104#issuecomment-1691945033 for additional details and instructions.

Amesos2

• Updates to STRUMPACK, SuperLU_DIST, MUMPS and LAPACK adapters

Anasazi

• Randomized eigensolver
• Improved testing with Tpetra

Belos

• Extend GCRO-DR linear solver to use Kokkos linear algebra for GEMMA
• Improved testing with Tpetra

Domi

• Package has been deprecated and removed from Trilinos

FEI

• Package has been deprecated and removed from Trilinos

Ifpack2

• 4th kind Chebyshev smoother
• Algorithmic and performance improvements for BlockTriDiag and BlockJacobi.
• Stream based RILU(k) and triangular solves
• Optimize Kokkos Kernels MDF ILU(0) solver and expose it in Ifpack2
• Patch solver with data compression

Komplex

• Package has been deprecated and removed from Trilinos

Moertel

• Package has been deprecated and removed from Trilinos

MueLu

• Better ML/MueLu compatibility (parameter translation, aggregation algorithms, ..)
• Reitzinger-Schoberl type multigrid for Maxwell problems
• BlockCRS support
• Improved setup performance on device (TAFC Tpetra changes)
• Matrix-free multigrid with user-specified operators
• AMG for hierarchical matrices

NOX

• Refactored internal use of model evaluators
• LOCA Householder constraint solver can now be nested within a Tempus transient problem (Tpetra version)

Pike

• Package has been deprecated and removed from Trilinos

Rythmos

• Package has been deprecated and removed from Trilinos

ShyLU

• FastILU algorithmic improvements and testing, new block version
• Transpose solve with Basker
• Tacho: runs with HIP.
• FROSch: fully recursive multi-level implementation
• FROSch: monolithic coarse spaces via partition-of-unity approach
• FROSch: GPU capabilities

Stratimikos

• Use of half precision preconditioners (Ifpack2, MueLu, ShyLU/FROSch)

Teko

• Epetra dependency is now optional

TriKota

• Package has been deprecated and removed from Trilinos