more warnings

CMakeLists.txt

common/cpp/src/data_structs/data_structs.cpp

common/cpp/src/database/database.cpp

common/cpp/src/database/encoding.cpp

common/cpp/src/database/mongodb_client.cpp

common/cpp/src/logger/fluentd_sink.cpp

common/cpp/src/logger/logger.cpp

common/cpp/src/system_io/system_io.cpp

common/cpp/src/system_io/system_io.h

common/cpp/src/system_io/system_io_linux_mac.cpp

consumer/api/cpp/unittests/test_consumer_impl.cpp

examples/consumer/simple-consumer-c/consume.c

producer/api/cpp/include/asapo/producer/producer_error.h

producer/api/cpp/src/producer_impl.cpp

producer/api/cpp/unittests/test_producer_impl.cpp

producer/event_monitor_producer/src/event_monitor_error.h

producer/event_monitor_producer/src/inotify_event.cpp

...monitor_producer/unittests/test_folder_event_detector.cpp

...ver/src/receiver_data_server/receiver_data_server_error.h

receiver/src/statistics/statistics_sender_influx_db.cpp