build problem

[Thanh-Binh]

by building using CMake I has problema as follows. error: ‘any_io_executor’ ‘class mqtt::socket’} has no member named ‘get_executor’ etc. (see below) Could you please help me? Thanks ###################### [ 0%] Building CXX object test/system/CMakeFiles/st_connect.dir/st_connect.cpp.o In file included from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/tcp_endpoint.hpp:14, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/server.hpp:16, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/common_type.hpp:13, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/session_state.hpp:21, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/broker.hpp:21, from /home/binh/experiments/MQTT/mqtt_cpp/test/system/combi_test.hpp:14, from /home/binh/experiments/MQTT/mqtt_cpp/test/system/st_connect.cpp:8: /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/type_erased_socket.hpp:40:17: error: ‘any_io_executor’ in namespace ‘mqtt::as’ does not name a type; did you mean ‘is_executor’? 40 | virtual as::any_io_executor get_executor() = 0; | ^~~~~~~~~~~~~~~ | is_executor In file included from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/server.hpp:16, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/common_type.hpp:13, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/session_state.hpp:21, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/broker.hpp:21, from /home/binh/experiments/MQTT/mqtt_cpp/test/system/combi_test.hpp:14, from /home/binh/experiments/MQTT/mqtt_cpp/test/system/st_connect.cpp:8: /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/tcp_endpoint.hpp:123:28: error: ‘any_io_executor’ in namespace ‘mqtt::as’ does not name a type; did you mean ‘is_executor’? 123 | MQTT_ALWAYS_INLINE as::any_io_executor get_executor() override final { | ^~~~~~~~~~~~~~~ | is_executor In file included from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/server.hpp:18, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/common_type.hpp:13, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/session_state.hpp:21, from /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/broker/broker.hpp:21, from /home/binh/experiments/MQTT/mqtt_cpp/test/system/combi_test.hpp:14, from /home/binh/experiments/MQTT/mqtt_cpp/test/system/st_connect.cpp:8: /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/endpoint.hpp: In member function ‘auto mqtt::endpoint<Mutex, LockGuard, PacketIdBytes>::get_executor()’: /home/binh/experiments/MQTT/mqtt_cpp/include/mqtt/endpoint.hpp:4971:25: error: ‘using element_type = class mqtt::socket’ {aka ‘class mqtt::socket’} has no member named ‘get_executor’ 4971 | return socket_->get_executor(); | ^~~~~~~~~~~~ make[2]: *** [test/system/CMakeFiles/st_connect.dir/build.make:76: test/system/CMakeFiles/st_connect.dir/st_connect.cpp.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:307: test/system/CMakeFiles/st_connect.dir/all] Error 2 make: *** [Makefile:146: all] Error 2