Made it compile under gcc 3.2.2 by adding explicit definitions

of normally derived comparison operators >, >=, and == for the
structure phenotype.  ( adding #include <utility> was not sufficient
to solve the problem)
Also added function gprop_use_datasets() to give more flexibility
in subclassing the datasets used to train the nets.

eo/app/gprop/gprop.cpp

@@ -16,6 +16,7 @@ using namespace std;
 //-----------------------------------------------------------------------------
 
 unsigned in, out, hidden;
+mlp::set train, validate, test;
 
 //-----------------------------------------------------------------------------
 // parameters
@@ -77,16 +78,17 @@ void arg(int argc, char** argv)
       exit(EXIT_SUCCESS);
     }
 
-  load_file(trn_set, "trn");
-  load_file(val_set, "val");
-  load_file(tst_set, "tst");
+  load_file(train, "trn");
+  load_file(validate, "val");
+  load_file(test, "tst");
     
-  phenotype::trn_max = trn_set.size();
-  phenotype::val_max = val_set.size();
-  phenotype::tst_max = tst_set.size();
+  phenotype::trn_max = train.size();
+  phenotype::val_max = validate.size();
+  phenotype::tst_max = test.size();
 
-  in = trn_set.front().input.size();
-  out = trn_set.front().output.size();
+  in = train.front().input.size();
+  out = train.front().output.size();
+  gprop_use_datasets(&train, &validate, &test);
   hidden = hiddenp.value();
 }
 
@@ -133,7 +135,7 @@ void ga()
   
   // stop condition
   eoGenContinue<Chrom> continuator1(generations.value());
-  phenotype p; p.val_ok = val_set.size() - 1; p.mse_error = 0;
+  phenotype p; p.val_ok = validate.size() - 1; p.mse_error = 0;
   eoFitContinue<Chrom> continuator2(p);
   eoCombinedContinue<Chrom> continuator(continuator1, continuator2);
 

eo/app/gprop/gprop.h

@@ -54,6 +54,23 @@ struct phenotype
   {
     return a.val_ok < b.val_ok || !(b.val_ok < a.val_ok) && b.mse_error < a.mse_error;
   }
+
+  friend bool operator==(const phenotype& a, const phenotype& b)
+  {
+    return a.val_ok == b.val_ok && b.mse_error == a.mse_error;
+  }
+
+  friend bool operator>=(const phenotype& a, const phenotype& b)
+  {
+    return !(a < b);
+  }
+
+  friend bool operator>(const phenotype& a, const phenotype& b)
+  {
+    return (!(a == b)) && (!(a < b));
+  }
+  
+  
   
   friend ostream& operator<<(ostream& os, const phenotype& p)
   {
@@ -69,6 +86,7 @@ struct phenotype
   }
 };
 
+
 unsigned phenotype::trn_max = 0, phenotype::val_max = 0, phenotype::tst_max = 0;
 
 //-----------------------------------------------------------------------------
@@ -121,7 +139,21 @@ public:
 // global variables
 //-----------------------------------------------------------------------------
 
-mlp::set trn_set, val_set, tst_set;
+mlp::set *trn_set = 0, *val_set = 0, *tst_set = 0;
+
+void gprop_use_datasets(mlp::set *trn, mlp::set *val, mlp::set *tst) {
+   trn_set = trn;
+   val_set = val;
+   tst_set = tst;
+}
+
+void ensure_datasets_initialized() {
+    if (!trn_set) {
+	cerr << "trn_set is not initialized.  Must call gprop_use_datasets before training\n";
+	cerr.flush();
+	abort();
+    }
+}
 
 //-----------------------------------------------------------------------------
 // eoChromMutation
@@ -133,7 +165,7 @@ public:
   bool operator()(Chrom& chrom)
   {
     mse::net tmp(chrom);
-    tmp.train(trn_set, 10, 0, 0.001);
+    tmp.train(*trn_set, 10, 0, 0.001);
     return true;
   }
 };
@@ -151,8 +183,9 @@ public:
     chrom2.desaturate();
 
     mse::net tmp1(chrom1), tmp2(chrom2);
-    tmp1.train(trn_set, 100, 0, 0.001);
-    tmp2.train(trn_set, 100, 0, 0.001);
+    ensure_datasets_initialized();
+    tmp1.train(*trn_set, 100, 0, 0.001);
+    tmp2.train(*trn_set, 100, 0, 0.001);
 
     return true;
   }
@@ -162,11 +195,11 @@ public:
 // eoChromEvaluator
 //-----------------------------------------------------------------------------
 
-unsigned correct(const mlp::net& net, const qp::set& set)
+unsigned correct(const mlp::net& net, const mlp::set& set)
 {
   unsigned sum = 0;
   
-  for (qp::set::const_iterator s = set.begin(); s != set.end(); ++s)
+  for (mlp::set::const_iterator s = set.begin(); s != set.end(); ++s)
     {
       unsigned partial = 0;
       
@@ -185,10 +218,11 @@ unsigned correct(const mlp::net& net, const qp::set& set)
 phenotype eoChromEvaluator(const Chrom& chrom)
 {
   phenotype p;
-  p.trn_ok = correct(chrom, trn_set);
-  p.val_ok = correct(chrom, val_set);
-  p.tst_ok = correct(chrom, tst_set);
-  p.mse_error = mse::error(chrom, val_set);
+  ensure_datasets_initialized();
+  p.trn_ok = correct(chrom, *trn_set);
+  p.val_ok = correct(chrom, *val_set);
+  p.tst_ok = correct(chrom, *tst_set);
+  p.mse_error = mse::error(chrom, *val_set);
 
   return p;
 };