Murtazo,

> I am trying to use dealii in my project. I linked to petcs while
> installing the package. Here I get some error during compiling any demo
> programs:
> [...]

Did you compile PETSc with MPI? If so, then do the following for deal.II:
  export CXX=mpiCC
  export CC=mpicc
  ./configure --enable-mpi --disable-threads

Best
 W.

-------------------------------------------------------------------------
Wolfgang Bangerth                email:            [email protected]
                                 www: http://www.math.tamu.edu/~bangerth/

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