../boost/smart_ptr/make_shared_object.hpp:55:13: warning: destructor called on non-final 'single_derived' that has virtual functions but non-virtual destructor [-Wdelete-non-virtual-dtor]
../boost/smart_ptr/make_shared_object.hpp:55:17: note: qualify call to silence this warning
/usr/include/c++/v1/memory:3604:5: warning: destructor called on non-final 'single_derived' that has virtual functions but non-virtual destructor [-Wdelete-non-virtual-dtor]
/usr/include/c++/v1/memory:3604:23: note: qualify call to silence this warning
2 warnings generated.