g++ -c user.cpp -g3 -Wall -I ../../include
../../include/base_store.h:24: warning: 'class BASE_STORE' has virtual functions but non-virtual destructor
../../include/base_plugin.h:30: warning: 'class BASE_PLUGIN' has virtual functions but non-virtual destructor
../../include/notifer.h: In instantiation of 'PROPERTY_NOTIFIER_BASE<int>':
user.h:80: instantiated from here
../../include/notifer.h:12: warning: 'class PROPERTY_NOTIFIER_BASE<int>' has virtual functions but non-virtual destructor
user.h:81: warning: 'class CHG_PASSIVE_NOTIFIER' has virtual functions but non-virtual
