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diff --git a/src/boost/libs/program_options/example/multiple_sources.cpp b/src/boost/libs/program_options/example/multiple_sources.cpp
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+++ b/src/boost/libs/program_options/example/multiple_sources.cpp
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+// Copyright Vladimir Prus 2002-2004.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+/* Shows how to use both command line and config file. */
+
+#include <boost/program_options.hpp>
+namespace po = boost::program_options;
+
+
+#include <iostream>
+#include <fstream>
+#include <iterator>
+using namespace std;
+
+// A helper function to simplify the main part.
+template<class T>
+ostream& operator<<(ostream& os, const vector<T>& v)
+{
+    copy(v.begin(), v.end(), ostream_iterator<T>(os, " ")); 
+    return os;
+}
+
+
+int main(int ac, char* av[])
+{
+    try {
+        int opt;
+        string config_file;
+    
+        // Declare a group of options that will be 
+        // allowed only on command line
+        po::options_description generic("Generic options");
+        generic.add_options()
+            ("version,v", "print version string")
+            ("help", "produce help message")
+            ("config,c", po::value<string>(&config_file)->default_value("multiple_sources.cfg"),
+                  "name of a file of a configuration.")
+            ;
+    
+        // Declare a group of options that will be 
+        // allowed both on command line and in
+        // config file
+        po::options_description config("Configuration");
+        config.add_options()
+            ("optimization", po::value<int>(&opt)->default_value(10), 
+                  "optimization level")
+            ("include-path,I", 
+                 po::value< vector<string> >()->composing(), 
+                 "include path")
+            ;
+
+        // Hidden options, will be allowed both on command line and
+        // in config file, but will not be shown to the user.
+        po::options_description hidden("Hidden options");
+        hidden.add_options()
+            ("input-file", po::value< vector<string> >(), "input file")
+            ;
+
+        
+        po::options_description cmdline_options;
+        cmdline_options.add(generic).add(config).add(hidden);
+
+        po::options_description config_file_options;
+        config_file_options.add(config).add(hidden);
+
+        po::options_description visible("Allowed options");
+        visible.add(generic).add(config);
+        
+        po::positional_options_description p;
+        p.add("input-file", -1);
+        
+        po::variables_map vm;
+        store(po::command_line_parser(ac, av).
+              options(cmdline_options).positional(p).run(), vm);
+        notify(vm);
+        
+        ifstream ifs(config_file.c_str());
+        if (!ifs)
+        {
+            cout << "can not open config file: " << config_file << "\n";
+            return 0;
+        }
+        else
+        {
+            store(parse_config_file(ifs, config_file_options), vm);
+            notify(vm);
+        }
+    
+        if (vm.count("help")) {
+            cout << visible << "\n";
+            return 0;
+        }
+
+        if (vm.count("version")) {
+            cout << "Multiple sources example, version 1.0\n";
+            return 0;
+        }
+
+        if (vm.count("include-path"))
+        {
+            cout << "Include paths are: " 
+                 << vm["include-path"].as< vector<string> >() << "\n";
+        }
+
+        if (vm.count("input-file"))
+        {
+            cout << "Input files are: " 
+                 << vm["input-file"].as< vector<string> >() << "\n";
+        }
+
+        cout << "Optimization level is " << opt << "\n";                
+    }
+    catch(exception& e)
+    {
+        cout << e.what() << "\n";
+        return 1;
+    }    
+    return 0;
+}