Commits on Apr 5, 2020

1. Disable -Wnon-virtual-dtor for classes derived from boost::system::er… …

   …ror_category
   
   Compiler warnings for non-virtual destructors are disabled for
   boost::system::error_category but the issue also affects all derived
   classes.
   
     error: base class ‘class boost::system::error_category’ has accessible non-virtual destructor [-Werror=non-virtual-dtor]
      class netdb_category : public boost::system::error_category
            ^~~~~~~~~~~~~~
     error: ‘class boost::asio::error::detail::netdb_category’ has virtual functions and accessible non-virtual destructor [-Werror=non-virtual-dtor]
   
     error: base class ‘class boost::system::error_category’ has accessible non-virtual destructor [-Werror=non-virtual-dtor]
      class addrinfo_category : public boost::system::error_category
            ^~~~~~~~~~~~~~~~~
     error: ‘class boost::asio::error::detail::addrinfo_category’ has virtual functions and accessible non-virtual destructor [-Werror=non-virtual-dtor]
   
     error: base class ‘class boost::system::error_category’ has accessible non-virtual destructor [-Werror=non-virtual-dtor]
      class misc_category : public boost::system::error_category
            ^~~~~~~~~~~~~
     error: ‘class boost::asio::error::detail::misc_category’ has virtual functions and accessible non-virtual destructor [-Werror=non-virtual-dtor]
   
   Disable -Wnon-virtual-dtor in the same way that Boost.System does.

   

   nomis committed Apr 5, 2020
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