Компиляция примера boost.asio

g++ test1.cpp -lboost_system

In file included from /usr/include/boost/asio/write.hpp:526,
                 from /usr/include/boost/asio/buffered_write_stream.hpp:32,
                 from /usr/include/boost/asio/buffered_stream.hpp:26,
                 from /usr/include/boost/asio.hpp:34,
                 from test1.cpp:2:
/usr/include/boost/asio/impl/write.ipp: In function ‘size_t boost::asio::write(SyncWriteStream&, const ConstBufferSequence&, CompletionCondition, boost::system::error_code&) [with SyncWriteStream = boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, ConstBufferSequence = boost::asio::const_buffers_1, CompletionCondition = boost::system::error_code]’:
/usr/include/boost/asio/impl/write.ipp:68:   instantiated from ‘size_t boost::asio::write(SyncWriteStream&, const ConstBufferSequence&, CompletionCondition) [with SyncWriteStream = boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, ConstBufferSequence = boost::asio::const_buffers_1, CompletionCondition = boost::system::error_code]’
test1.cpp:29:   instantiated from here
/usr/include/boost/asio/impl/write.ipp:40: error: no match for call to ‘(boost::system::error_code) (boost::system::error_code&, size_t&)’
/usr/include/boost/asio/impl/write.ipp:40: note: candidates are: void (*)() <conversion>
/usr/include/boost/asio/impl/write.ipp:68:   instantiated from ‘size_t boost::asio::write(SyncWriteStream&, const ConstBufferSequence&, CompletionCondition) [with SyncWriteStream = boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, ConstBufferSequence = boost::asio::const_buffers_1, CompletionCondition = boost::system::error_code]’
test1.cpp:29:   instantiated from here
/usr/include/boost/asio/impl/write.ipp:47: error: no match for call to ‘(boost::system::error_code) (boost::system::error_code&, size_t&)’
/usr/include/boost/asio/impl/write.ipp:47: note: candidates are: void (*)() <conversion>

#include <iostream>
#include <boost/asio.hpp>
 
int main() {
   static const char* ip = "127.0.0.1";
   static const boost::uint16_t port = 44550;
   static const char message[] = "Hello, world!";
 
   // io_service - основа asio.
   boost::asio::io_service ios;
 
   // объект TCP-сокета.
   boost::asio::ip::tcp::socket socket(ios);
 
   // объект представляющий адрес для TCP соединений.
   boost::asio::ip::tcp::endpoint endpoint(boost::asio::ip::address::from_string(ip), port);
 
   // подключаемся к серверу.
   boost::system::error_code error;
   socket.connect(endpoint, error);
 
   // проверяем код завершения операции подключения.
   if ( error ) {
      std::cout << "asio system error: " << error.message() << std::endl;
      return 1;
   }
 
   // посылаем сообщение.
   size_t wr = boost::asio::write(socket, boost::asio::buffer(message, sizeof(message)), error);
 
   // проверяем код завершения операции записи.
   if ( !error ) {
      std::cout << "message sent successfully!" << std::endl;
   } else {
      std::cout << "message sent error: " << error.message() << std::endl;
   }
 
   // закрываем сокет.
   socket.close();
 
   // завершаемся.
   return 0;
}