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Quick configure, build and install hints for Trilinos

Contact

[email protected]

This document is intended to be a very concise set of examples of how to configure, build, install, and build downstream code against Trilinos. The intended audience is those who need a quick refresher on Trilinos CMake build system or those wanting a quick install without worrying about all the features and options that are available. For a more in-depth document on what features and options are available and how to use them, see the document:

https://trilinos.org/docs/files/TrilinosBuildReference.html

Requirements

  • CMake 3.23.0 or newer
  • C and C++ compiler
  • Optionally a Fortran compiler
  • Optionally an installation of MPI

Instructions

Following are a few examples of simple configurations for Trilinos. Anything in <> should be replaced with the appropriate path or value and excluding the <>.

It is recommended that you put your configure options in a script (e..g do-configure) so you can repeat the configure if necessary.

Note: all examples assume a unix like command line and the CMake Makefile Generator.

Simple MPI instructions (enables most packages)

cmake \
-DTPL_ENABLE_MPI=ON \
-DMPI_BASE_DIR=<path to mpi install> \
-DTrilinos_ENABLE_ALL_PACKAGES=ON \
-DCMAKE_INSTALL_PREFIX=<path to install Trilinos into> \
<path to Trilinos source>

make -j<n> install

NOTE: Enabling all packages will trigger the enable of several third-party libraries (TPLs). If CMake can't find these TPLs on your system, then you will need to either point to them or disable them as specified in the CMake output.

Simple non-MPI instructions (enables most packages)

cmake \
-DCMAKE_C_COMPILER=<path to C compiler> \
-DCMAKE_CXX_COMPILER=<path to C++ compiler> \
-DCMAKE_Fortran_COMPILER=<path to Fortran compiler> \
-DTrilinos_ENABLE_ALL_PACKAGES=ON \
-DCMAKE_INSTALL_PREFIX=<path to install Trilinos into> \
<path to Trilinos source>

make -j<n> install

Intermediate MPI instructions (enables a few packages)

cmake \
-DTPL_ENABLE_MPI=ON \
-DMPI_BASE_DIR=<path to mpi install> \
-DTrilinos_ENABLE_Epetra=ON \
-DTrilinos_ENABLE_AztecOO=ON \
-DTrilinos_ENABLE_Ifpack=ON \
-DCMAKE_INSTALL_PREFIX=<path to install Trilinos into> \
<path to Trilinos source>

make -j<n> install

Intermediate MPI instructions (enables a few packages, explicit compilers) -------------------------------------------------------------------------

cmake \
-DTPL_ENABLE_MPI=ON \
-DCMAKE_C_COMPILER=<path to MPI C compiler wrapper> \
-DCMAKE_CXX_COMPILER=<path to MPI C++ compiler wrapper> \
-DCMAKE_Fortran_COMPILER=<path to MPI Fortran compiler wrapper> \
-DTrilinos_ENABLE_Epetra=ON \
-DTrilinos_ENABLE_AztecOO=ON \
-DTrilinos_ENABLE_Ifpack=ON \
-DCMAKE_INSTALL_PREFIX=<path to install Trilinos into> \
<path to Trilinos source>

make -j<n> install

Useful Options

To generate Ninja build files (Ninja 1.10+) instead of Makefiles use:

-GNinja

To use shared libraries (much smaller executables and faster linking) use:

-DBUILD_SHARED_LIBS=ON

To enable support for the float scalar type use:

-DTrilinos_ENABLE_FLOAT=ON

To enable support for std::complex<T> scalar types use:

-DTrilinos_ENABLE_COMPLEX=ON

To disable Fortran use the following:

-DTrilinos_ENABLE_Fortran=OFF

To enable a package:

-DTrilinos_ENABLE_<package name>=ON

To get the list of packages that can be enabled, run:

cmake <path to Trilinos source> 2>&1 \
  | grep "Final set of non-enabled SE packages"

To enable tests:

-DTrilinos_ENABLE_TESTS=ON

Building against installed Trilinos

For information on how to build against an installation of Trilinos, see demos/simpleBuildAgainstTrilinos

Support for Different Compilers/MPIs

Trilinos tests with all Compiler/MPI combinations listed at:

https://github.com/trilinos/Trilinos/wiki/Pull-Request-Testing-Interface

Compilers/MPIs that are not part of our automated process will not receive support. We are happy to accept Pull Requests enhancing support for other compilers/MPIs as needed by our customers, with the understanding that said configurations cannot be guaranteed to work.