"private: static struct MQTTAsync_createOptions const mqtt::create_options::DFLT_C_STRUCT" (?DFLT_C_STRUCT@create_options@mqtt@@0UMQTTAsync_createOptions@@b) referenced in function main async_publish_time C:\Users\Usuario\Desktop\VDB\dependencias\paho.mqtt.cpp\build\src\samples\async_publish_...