fix: remove a lot of trivial warnings

eo/src/eoPartiallyMappedXover.h

@@ -82,9 +82,9 @@ public:
 
       // replace if necessary
       for(i = 0; i < i1; i++) {
-	while (p1[ _solution1[i] ] != -1) 
+	while (p1[ _solution1[i] ] != -1) // FIXME as an unsigned int, p1 cannot hold negative values!
 	  _solution1[i] = p1[_solution1[i]];
-	while (p2[ _solution2[i] ] != -1) 
+	while (p2[ _solution2[i] ] != -1)  // FIXME as an unsigned int, p2 cannot hold negative values!
 	  _solution2[i] = p2[_solution2[i]];
       }      
 
@@ -96,9 +96,9 @@ public:
 
       // replace if necessary
       for(i = i2 + 1; i < _solution1.size(); i++) {
-	while (p1[ _solution1[i] ] != -1) 
+	while (p1[ _solution1[i] ] != -1)  // FIXME as an unsigned int, p1 cannot hold negative values!
 	  _solution1[i] = p1[_solution1[i]];
-	while (p2[ _solution2[i] ] != -1) 
+	while (p2[ _solution2[i] ] != -1)  // FIXME as an unsigned int, p2 cannot hold negative values!
 	  _solution2[i] = p2[_solution2[i]];
       }      
 

eo/src/gp/eoParseTreeDepthInit.h

@@ -50,7 +50,11 @@ class eoParseTreeDepthInit : public eoInit< eoParseTree<FType, Node> >
     protected:
         // a binary predicate for sorting
         // hopefully this will work with M$VC++ 6.0
+#if __cplusplus >= 201103L
+        struct lt_arity:public std::function<bool(Node,Node)>
+#else
         struct lt_arity:public std::binary_function<Node,Node,bool>
+#endif
         {
                 bool operator()(const Node &_node1, const Node &_node2) { return (_node1.arity() < _node2.arity());};
         };

eo/test/t-eoCheckpointing.cpp

@@ -31,8 +31,6 @@ public :
 int the_main(int argc, char **argv)
 { // ok, we have a command line parser and a state
 
-    typedef eoBit<float> Chrom;
-
     eoParser parser(argc, argv);
 
     // Define Parameters

eo/test/t-eoSelect.cpp

@@ -126,7 +126,7 @@ eoValueParam<unsigned> tournamentSizeParam = parser.createParam(unsigned(2), "to
       }
 
     // hard-coded directory name ...
-    const int ignored = system("mkdir ResSelect");
+    (void) system("mkdir ResSelect");
     std::cout << "Testing the Selections\nParents size = " << pSize
 	 << ", offspring rate = " << oRate;
     std::cout << " and putting rsulting files in dir ResSelect" << std::endl;

eo/test/t-eoSharing.cpp

@@ -193,7 +193,7 @@ int the_main(int argc, char **argv)
 
       std::cout << "The resulting file (in dir ResSelect), contains \n";
     std::cout << " the empirical proba. for each indi to be selected." << std::endl;
-    const int ignored = system("mkdir ResSelect");
+    (void) system("mkdir ResSelect");
 
     // initialize parent population
     parentsOrg.resize(pSize);

eo/test/t-eoStateAndParser.cpp

@@ -37,8 +37,6 @@ struct Dummy : public EO<double>
 int the_main(int argc, char **argv)
 { // ok, we have a command line parser and a state
 
-    typedef eoBit<float> Chrom;
-
     eoParser parser(argc, argv);
 
     // Define Parameters