./boost/spirit/home/classic/core/scanner/scanner.hpp:132: warning: dereferencing pointer 'val' does break strict-aliasing rules
Again, this is normally a bug once optimizations are turned on.
It's the first time I'm seeing this problem in Spirit. We need to investigate this more closely as the warning comes from a template function (and 'val' is a template parameter), so I assume the issue is in the code using Spirit. What file produces this diagnostic?
It's from the serialization build:
gcc.compile.c++ /home/john/bin/boost/bin.v2/libs/serialization/build/gcc- 4.4.1/release/link-static/threading-multi/xml_wgrammar.o In file included from ./boost/archive/impl/basic_xml_grammar.hpp:59, from libs/serialization/src/xml_wgrammar.cpp:18: ./boost/spirit/core/non_terminal/rule.hpp:18:4: warning: #warning "This header is deprecated. Please use: boost/spirit/include/classic_rule.hpp" In file included from libs/serialization/src/basic_xml_grammar.ipp:20, from libs/serialization/src/xml_wgrammar.cpp:146: ./boost/spirit/core/composite/operators.hpp:18:4: warning: #warning "This header is deprecated. Please use: boost/spirit/include/classic_operators.hpp" In file included from libs/serialization/src/basic_xml_grammar.ipp:21, from libs/serialization/src/xml_wgrammar.cpp:146: ./boost/spirit/core/composite/actions.hpp:18:4: warning: #warning "This header is deprecated. Please use: boost/spirit/include/classic_actions.hpp" In file included from libs/serialization/src/basic_xml_grammar.ipp:22, from libs/serialization/src/xml_wgrammar.cpp:146: ./boost/spirit/core/primitives/numerics.hpp:18:4: warning: #warning "This header is deprecated. Please use: boost/spirit/include/classic_numerics.hpp" In file included from ./boost/spirit/home/classic/core/non_terminal/rule.hpp:33, from ./boost/spirit/include/classic_rule.hpp:11, from ./boost/spirit/core/non_terminal/rule.hpp:25, from ./boost/archive/impl/basic_xml_grammar.hpp:59, from libs/serialization/src/xml_wgrammar.cpp:18: ./boost/spirit/home/classic/core/scanner/scanner.hpp: In member function 'typename boost::spirit::match_result<ScannerT, AttrT>::type boost::spirit::impl::concrete_parser<ParserT, ScannerT, AttrT>::do_parse_virtual(const ScannerT&) const [with ParserT = boost::spirit::alternative<boost::spirit::alternative<boost::spirit::al ternative<boost::spirit::rule<boost::spirit::scanner<__gnu_cxx::__norma l_iterator<wchar_t*, std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > >, boost::spirit::scanner_policies<boost::spirit::iteration_policy, boost::spirit::match_policy, boost::spirit::action_policy> >, boost::spirit::nil_t, boost::spirit::nil_t>, boost::spirit::rule<boost::spirit::scanner<__gnu_cxx::__normal_iterator <wchar_t*, std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > >, boost::spirit::scanner_policies<boost::spirit::iteration_policy, boost::spirit::match_policy, boost::spirit::action_policy> >, boost::spirit::nil_t, boost::spirit::nil_t> >, boost::spirit::rule<boost::spirit::scanner<__gnu_cxx::__normal_iterator <wchar_t*, std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > >, boost::spirit::scanner_policies<boost::spirit::iteration_policy, boost::spirit::match_policy, boost::spirit::action_policy> >, boost::spirit::nil_t, boost::spirit::nil_t> >, boost::spirit::action<boost::spirit::chset<wchar_t>, boost::archive::xml::append_char<std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > > > >, ScannerT = boost::spirit::scanner<__gnu_cxx::__normal_iterator<wchar_t*, std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > >, boost::spirit::scanner_policies<boost::spirit::iteration_policy, boost::spirit::match_policy, boost::spirit::action_policy> >, AttrT = boost::spirit::nil_t]': ./boost/spirit/home/classic/core/scanner/scanner.hpp:132: warning: dereferencing pointer 'val' does break strict-aliasing rules ./boost/optional/optional.hpp:422: note: initialized from here
This one is caused by the code in optional.hpp (I'm seeing similar warnings from optional in Wave, BTW), so it needs to be fixed there... Regards Hartmut ------------------- Meet me at BoostCon http://boostcon.com