<title>The deal.II Readme on interfacing to PETSc and Trilinos</title>
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<li> In the section <code>SECTION 2: BLACS INTERNALS</code>
the most important variables are <code>INTFACE</code> and
<code>TRANSCOMM</code>. If you are using OpenMPI, then set
- these as follows: <code>INTFACE = -DAdd</code>
+ these as follows: <code>INTFACE = -DAdd_</code>
and <code>TRANSCOMM = -DUseMpi2</code>. Otherwise, consult
the
<a ref='http://www.netlib.org/blacs/BLACS/Install.html'>BLACS