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PETSc support

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Knut Morten Okstad edited this page Jun 14, 2026 · 2 revisions

IFEM can utilize the PETSc library for iterative linear solvers, preconditioners and assembly. Currently version 3.6.3+ and 3.7.x have been confirmed working.

Compiling IFEM with PETSc support

To compile IFEM with PETSc support, you need to pass the -DIFEM_USE_PETSC=ON option to xmake. This again depends on you having two environment variables set

  • PETSC_DIR - the root path of your PETSc installation
  • PETSC_ARCH - the architecture of your PETSc installation

Compiling IFEM with parallel PETSc support

To compile IFEM with parallel PETSc support, you need to pass -DIFEM_USE_PETSC=ON -DIFEM_USE_MPI=ON options to cmake. This will enable distributed memory parallel computing support through PETSc in IFEM.

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