[petsc-users] Two applications with PETSc

[Guido Giuntoli]

Hi, I have two codes that use PETSc. The first one is parallel and uses MPI
and the other doesn't uses MPI (uses sequencial Mats and Vecs because the
problem is smaller). I need now to couple both codes and my question is how
do I deal with the PetscInitialize in the sequential code ? I know that
PetscInitialize calls MPI_Init so I think if the first code just called
MPI_Init before I will get an error or not ? Every process in the parallel
code needs to use the functions of the sequential code, so every process
will call PetscInitialize of the sequential code.

constrain : I would like to use the same compiled library of petsc to link
both codes.

Thank you, Guido.
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