提升asio ssl流套接字编译问题

在c应用程序中使用boost 1.4.2 asio并获得linux编译器警告我不会理解 .

还在？
我正在使用的应用程序需要"socket"，它可能是一个ssl套接字或一个普通的tcp套接字，所以我们隐藏模板"socket"类后面的细节，它接受ssl套接字类或tcp套接字类作为模板参数 - 下面是ssl类码 .
该应用程序正常运行，未启用任何优化;问题是当我在linux g 4.4.1下编译并在-02或更高版本打开优化时，-fstrict-aliasing标志被打开 . 编译结果严格别名警告沿着以下几行："warning: dereferencing type-punned pointer will break strict-aliasing rules"我无法解除引用_psock（例如_psock->握手）

我想知道为什么会发出这个警告，这是否表明存在设计问题......

class socket_ssl_cli
{
public:

    typedef ba::ssl::stream<ba::ip::tcp::socket> socket_type;
    socket_ssl_cli(ba::io_service& io_svc, SocketConfig & sockcfg)
        : _io_svc(io_svc)
        , _ctxt(_io_svc, ba::ssl::context::tlsv1)
        , _psock(0)
    {
        try {
            // the one and only ssl context
            // hardcoded for test, but get these values from config
            _ctxt.set_options(ba::ssl::context::default_workarounds | 
                                ba::ssl::context::verify_none);

            _psock = new socket_type(_io_svc, _ctxt);
        } catch (bs::system_error & x) {
            throw std::runtime_error(x.code().message());
        }

    }

    ~socket_ssl_cli() 
    { 
        if (_psock) {
            bs::error_code ec;
            close_socket(ec); 
            delete _psock; 
        }
    }

    socket_type & raw_socket() { return *_psock; }

    void setup(bs::error_code & ec)
    {
        _psock->handshake(ba::ssl::stream_base::client, ec);
    }

    void close_socket(bs::error_code & ec) 
    { 
        // shut down ssl, then shutdown socket, then close socket
        _psock->shutdown(ec);
        _psock->lowest_layer().shutdown(ba::socket_base::shutdown_both, ec);
        _psock->lowest_layer().close(ec);
    }

private:

    ba::io_service & _io_svc;
    ba::ssl::context _ctxt;
    socket_type * _psock;
};

打开-02时所有痛苦的编译输出，这会产生-fstrict-aliasing

../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:321:warning:dereferencing type-punned pointer将破坏严格别名规则../ .. /../../third-party/boost/1.42.0/boost/function/function_base.hpp:325:warning:dereferencing type-punned pointer将打破严格别名规则../../../ . ./third-party/boost/1.42.0/boost/function/function_base.hpp：静态成员函数'static void boost :: detail :: function :: functor_manager_common :: manage_small（const boost :: detail :: function： ：function_buffer＆，boost :: detail :: function :: function_buffer＆，boost :: detail :: function :: functor_manager_operation_type）[with Functor = boost :: _ bi :: bind_t >>>，boost :: _ bi :: list1 >> * >>>>]'：../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:360：从'static void boost :: detail :: function实例化:: functor_manager :: manager（const boost :: detail :: function :: function_buffer＆，boost :: detail :: function :: function_buffer＆，boost :: detail :: function :: functor_manager_operation type，mpl _ :: true）[与Functor = boost :: _ bi :: bind_t >>>，boost :: _ bi :: list1 >> * >>>]] ../../../../third -party / boost / 1.42.0 / boost / function / function_base.hpp：406：从'static void boost :: detail :: function :: functor_manager :: manager实例化（const boost :: detail :: function :: function_buffer＆， boost :: detail :: function :: function_buffer＆，boost :: detail :: function :: functor_manager_operation_type，boost :: detail :: function :: function_obj_tag）[with Functor = boost :: _ bi :: bind_t >>>，boost： ：_bi :: list1 >> * >>>>]'../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:434：从'static void实例化boost :: detail :: function :: functor_manager :: manage（const boost :: detail :: function :: function_buffer＆，boost :: detail :: function :: function_buffer＆，boost :: detail :: function :: functor_manager_operation_type）[with Functor = boost :: _ bi :: bind_t >>>，boost :: _ bi :: list1 >> * >>>>]'../../../../third-party/boost/1.42.0/ boost / function / function_template.hpp：913：从'vo . 实例化id boost :: function0 :: assign_to（Functor）[与Functor = boost :: _ bi :: bind_t >>>，boost :: _ bi :: list1 >> * >>>，R = int]'../ .. /../../third-party/boost/1.42.0/boost/function/function_template.hpp:722：从'boost :: function0 :: function0实例化（Functor，typename boost :: enable_if_c :: type）[使用Functor = boost :: _ bi :: bind_t >>>，boost :: _ bi :: list1 >> * >>>，R = int]'../../../../third-party/boost /1.42.0/boost/function/function_template.hpp:1064：从'boost :: function :: function（Functor，typename boost :: enable_if_c :: type）实例化[with Functor = boost :: _ bi :: bind_t >> >，boost :: _ bi :: list1 >> * >>>，R = int]'../../../../third-party/boost/1.42.0/boost/function/function_template.hpp ：1105：从'typename boost :: enable_if_c＆> :: type boost :: function :: operator =（Functor）实例化[与Functor = boost :: _ bi :: bind_t >>>，boost :: _ bi :: list1 >> * >>>，R = int]'../../../../third-party/boost/1.42.0/boost/asio/ssl/detail/openssl_operation.hpp:134：从'boost实例化:: asio :: ssl :: detail :: openssl_operation :: openssl_operation（boost :: asio :: ssl :: detail :: ssl_primitive_func，Stream＆，boost :: asio :: ssl :: detail :: net_buffer＆，SSL *，BIO *）[with Stream = boost :: asio :: basic_stream_socket>]'../../../../third-party/boost/1.42.0/boost/asio/ssl/detail/openssl_stream_service.hpp： 510：从'boost :: system :: error_code boost :: asio :: ssl :: detail :: openssl_stream_service :: handshake实例化（boost :: asio :: ssl :: detail :: openssl_stream_service :: impl_struct *＆，Stream＆， boost :: asio :: ssl :: stream_base :: handshake_type，boost :: system :: error_code＆）[with Stream = boost :: asio :: basic_stream_socket>]'../../../../third- party / boost / 1.42.0 / boost / asio / ssl / stream_service.hpp：100：从'boost :: system :: error_code boost :: asio :: ssl :: stream_service :: handshake（boost :: asio ::）实例化ssl :: detail :: openssl_stream_service :: impl_struct *＆，Stream＆，boost :: asio :: ssl :: stream_base :: handshake_type，boost :: system :: error_code＆）[with Stream = boost :: asio :: basic_stream_socket>] '../../../ .. /third-party/boost/1.42.0/boost/asio/ssl/stream.hpp:207：从'boost :: system :: error_code实例化boost :: asio :: ssl :: stream :: handshake（boost :: asio :: ssl :: stream_base :: handshake_type，boost :: system :: error_code＆）[with Stream = boost :: asio :: basic_stream_socket>，Service = boost :: asio :: ssl :: stream_service]'../sockets/socket_ssl_cli.h:45：从这里实例化