/home/xxx//libmosquitto.so: undefined reference toSSL_pending' /home/xxx//libmosquitto.so: undefined reference toENGINE_load_private_key' /home/xxx//libmosquitto.so: undefined reference toERR_error_string' /home/xxx//libmosquitto.so: undefined reference toSSL_ctrl' /home/xxx//libmosquitto.so...