Intel C++ 2016 on Windows is spitting out many warning #809 on code that never gave such warnings with previous versions and for which other compilers do not complain. It is related to virtual destructors in subclasses and says that the exception specification in the subclass destructor is incompatible with that of the overridden destructor. None of them have an explicit exception specification.
For now I'm disabling that warning but this appears to be a compiler issue. Comments?
Stuart