Portability¶
MPI 3.0 is now required, 2.0 no longer supported¶
When building with MPI library, GROMACS 2026 requires it to be conformant with MPI 3.0. This should not be a problem as long as you are using MPI library from the past decade (e.g., OpenMPI 1.8+, MPICH 3.0+).