On Wednesday, November 9, 2016 at 11:44:30 PM UTC+1, Joaquin wrote:
>
> Apparently I used the same MPI by default for both of them. 
>

Not necessarily. You need to check logs to see what is picked up by 
Trilinos and what is picked up by deal.II.
To make sure both use the same MPI you can do:

-DCMAKE_C_COMPILER=
-DCMAKE_CXX_COMPILER=
-DCMAKE_Fortran_COMPILER=

to point to MPI compiler wrappers in deal.II and set

-DMPI_BASE_DIR:PATH=
-DTPL_ENABLE_MPI:BOOL=ON

in Trilinos.

If you still have problems, another option is to use tools to build the 
stack of software, such as 
https://github.com/dealii/candi
and
https://github.com/dealii/dealii/wiki/deal.II-in-Spack

Regards,
Denis.

>

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