/usr/include/deal.II/lac/petsc_compatibility.h is in libdeal.ii-dev 8.4.2-2+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// Copyright (C) 2016 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE at
// the top level of the deal.II distribution.
//
// ---------------------------------------------------------------------
/*
* Rather than using ifdefs everywhere, try to wrap older versions of PETSc
* functions in one place.
*/
#ifndef dealii__petsc_compatibility_h
#define dealii__petsc_compatibility_h
#include <deal.II/base/config.h>
#ifdef DEAL_II_WITH_PETSC
#include <petscconf.h>
#include <petscpc.h>
#include <string>
DEAL_II_NAMESPACE_OPEN
namespace PETScWrappers
{
/**
* Set an option in the global PETSc database. This function just wraps
* PetscOptionsSetValue with a version check (the signature of this function
* changed in PETSc 3.7.0).
*/
inline void set_option_value (const std::string &name,
const std::string &value)
{
#if DEAL_II_PETSC_VERSION_LT(3, 7, 0)
PetscOptionsSetValue (name.c_str (), value.c_str ());
#else
PetscOptionsSetValue (NULL, name.c_str (), value.c_str ());
#endif
}
}
DEAL_II_NAMESPACE_CLOSE
#endif // DEAL_II_WITH_PETSC
#endif // dealii__petsc_compatibility_h
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