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diff --git a/lemon/lemon/lp.h b/lemon/lemon/lp.h
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+/* -*- mode: C++; indent-tabs-mode: nil; -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library.
+ *
+ * Copyright (C) 2003-2010
+ * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Research Group on Combinatorial Optimization, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+#ifndef LEMON_LP_H
+#define LEMON_LP_H
+
+#include<lemon/config.h>
+
+
+#ifdef LEMON_HAVE_GLPK
+#include <lemon/glpk.h>
+#elif LEMON_HAVE_CPLEX
+#include <lemon/cplex.h>
+#elif LEMON_HAVE_SOPLEX
+#include <lemon/soplex.h>
+#elif LEMON_HAVE_CLP
+#include <lemon/clp.h>
+#endif
+
+///\file
+///\brief Defines a default LP solver
+///\ingroup lp_group
+namespace lemon {
+
+#ifdef DOXYGEN
+  ///The default LP solver identifier
+
+  ///The default LP solver identifier.
+  ///\ingroup lp_group
+  ///
+  ///Currently, the possible values are \c GLPK, \c CPLEX,
+  ///\c SOPLEX or \c CLP
+#define LEMON_DEFAULT_LP SOLVER
+  ///The default LP solver
+
+  ///The default LP solver.
+  ///\ingroup lp_group
+  ///
+  ///Currently, it is either \c GlpkLp, \c CplexLp, \c SoplexLp or \c ClpLp
+  typedef GlpkLp Lp;
+
+  ///The default MIP solver identifier
+
+  ///The default MIP solver identifier.
+  ///\ingroup lp_group
+  ///
+  ///Currently, the possible values are \c GLPK or \c CPLEX
+#define LEMON_DEFAULT_MIP SOLVER
+  ///The default MIP solver.
+
+  ///The default MIP solver.
+  ///\ingroup lp_group
+  ///
+  ///Currently, it is either \c GlpkMip or \c CplexMip
+  typedef GlpkMip Mip;
+#else
+#ifdef LEMON_HAVE_GLPK
+# define LEMON_DEFAULT_LP GLPK
+  typedef GlpkLp Lp;
+# define LEMON_DEFAULT_MIP GLPK
+  typedef GlpkMip Mip;
+#elif LEMON_HAVE_CPLEX
+# define LEMON_DEFAULT_LP CPLEX
+  typedef CplexLp Lp;
+# define LEMON_DEFAULT_MIP CPLEX
+  typedef CplexMip Mip;
+#elif LEMON_HAVE_SOPLEX
+# define DEFAULT_LP SOPLEX
+  typedef SoplexLp Lp;
+#elif LEMON_HAVE_CLP
+# define DEFAULT_LP CLP
+  typedef ClpLp Lp;
+#endif
+#endif
+
+} //namespace lemon
+
+#endif //LEMON_LP_H