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+// file : hello/database.hxx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+//
+// Create concrete database based on the DATABASE_* macros.
+//
+
+#include <string>
+#include <memory> // std::auto_ptr
+#include <cstdlib> // std::exit
+#include <iostream>
+
+#include <odb/database.hxx>
+
+#if defined(DATABASE_MYSQL)
+# include <odb/mysql/database.hxx>
+#endif
+
+inline std::auto_ptr<odb::database>
+create_database (int& argc, char* argv[])
+{
+ using namespace std;
+ using namespace odb;
+
+ if (argc > 1 && argv[1] == string ("--help"))
+ {
+ cerr << "Usage: " << argv[0] << " [options]" << endl
+ << "Options:" << endl;
+
+#if defined(DATABASE_MYSQL)
+ mysql::database::print_usage (cerr);
+#endif
+
+ exit (0);
+ }
+
+#if defined(DATABASE_MYSQL)
+ return auto_ptr<database> (new mysql::database (argc, argv));
+#endif
+}