Tell PETSc where to find correct MPI implementation while building from source

Question

Dear openCARP community,

I have built PETSc and openCARP on a remote server. While building openCARP following the instructions from the openCARP installation page, I ran into the error:

#error "PETSc was configured with MPICH but now appears to be compiling using a non-MPICH mpi.h"

I could solve this by using the option -DMPI_C_COMPILER=$PETSC_DIR/bin/mpicc when running cmake. I hope that this post might help people experiencing the same error when building from source.

Best regards,

Marie

Answer 1

Thanks Marie!