Install deal II with PETSc and MPICH

[Giselle Sosa Jones]

Hello,

I have a PETSc installation that uses mpich. I am trying to install deal II with:

cmake -DDEAL_II_WITH_PETSC=ON -DCMAKE_INSTALL_PREFIX=/Users/gisellesosajones/Documents/deal_ii_95 -DPETSC_DIR=$PETSC_DIR -DPETSC_ARCH=$PETSC_ARCH -DDEAL_II_WITH_MPICH=ON -DDEAL_II_WITH_HDF5=OFF

However, I get the error message

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

when trying to install. Is there any workaround for this?

Thank you in advance.

Giselle

[Bruno Turcksin]

Giselle,

You have multiple versions of MPI installed on your computer. I would strongly advise that you remove the extra MPI libraries and keep only one of them. Anyway to fix your issue, you can use `-DMPI_CXX_COMPILER=/path/to/mpich/mpicxx` to tell CMake which MPI compiler to use.

Best,

Bruno