diff -r a32f990b73d9 -r ee5959aa4410 src/lemon/lp_skeleton.cc
--- a/src/lemon/lp_skeleton.cc	Fri Apr 15 22:12:51 2005 +0000
+++ b/src/lemon/lp_skeleton.cc	Sun Apr 17 18:57:22 2005 +0000
@@ -21,6 +21,16 @@
 ///\brief A skeleton file to implement LP solver interfaces
 namespace lemon {
   
+  LpSolverBase &LpSkeleton::_newLp()
+  {
+    return *((LpSolverBase *)0);
+  }
+  
+  LpSolverBase &LpSkeleton::_copyLp()
+  {
+    return *((LpSolverBase *)0);
+  }
+
   int LpSkeleton::_addCol()
   {
     return ++col_num;