int main( int argc, char *argv[] )
{

#ifdef DEBUG
    std::cout << "This is DEBUG build." << std::endl;
#else
  #ifndef QT_NO_DEBUG_OUTPUT
    qtmsg = fopen( "loggyview.log",
    #ifdef _MSC_VER
                   "a+"
    #else // no _MSC_VER
                   "a+t"
    #endif // _MSC_VER
    );
    QtMessageHandler oldmh = qInstallMessageHandler( messageOutputToFile );
  #endif
#endif

    QApplication app(argc, argv);

    QString server, database, user, password;
    QString brokerURI;
    QString topic;

    const QStringList &args = app.arguments();
    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("xxxxxx");
    db.setDatabaseName("dbdbdbd");
    db.setUserName("usrname");
    db.setPassword("yyyyyyy");

    // theapp -S <host> -D <db> -U <user> -P <password>
    QRegExp rxArgSrv("--server=(\\S+)");
    QRegExp rxArgDb("--database=(\\S+)");
    QRegExp rxArgUsr("--user=(\\S+)");
    QRegExp rxArgPwd("--password=(\\S+)");
    QRegExp rxArgCMSURI("--broker-uri=(\\S+)");
    QRegExp rxArgTopic("--topic=(\\S+)");

    for( int i = 1; i < args.size(); ++i)
    {
        // -S
        if( args.at(i) == "-S" && i+1 < args.size() )
            server = args.at(++i);
        else if( rxArgSrv.indexIn(args.at(i)) != -1 )
            server = rxArgSrv.cap(1);
        // -D
        else if( args.at(i) == "-D" && i+1 < args.size() )
            database = args.at(++i);
        else if( rxArgDb.indexIn(args.at(i)) != -1 )
            database = rxArgDb.cap(1);
        // -U
        else if( args.at(i) == "-U" && i+1 < args.size() )
            user = args.at(++i);
        else if( rxArgUsr.indexIn(args.at(i)) != -1 )
            user = rxArgUsr.cap(1);
        // -P
        else if( args.at(i) == "-P" && i+1 < args.size() )
            password = args.at(++i);
        else if( rxArgPwd.indexIn(args.at(i)) != -1 )
            password = rxArgPwd.cap(1);
        // -B
        else if( args.at(i) == "-B" && i+1 < args.size() )
             brokerURI = args.at(++i);
        else if( rxArgCMSURI.indexIn(args.at(i)) != -1 )
             brokerURI = rxArgCMSURI.cap(1);
        // -T
        else if( args.at(i) == "-T" && i+1 < args.size() )
             topic = args.at(++i);
        else if( rxArgTopic.indexIn(args.at(i)) != -1 )
             topic = rxArgTopic.cap(1);
    }

// ....

}