Hi everyone, I've run into a problem with std::type_info. It appears that hidden visibility can cause multiple instances of a type_info object for one type, hence RTTI information is not being merged across SSO and DSO boundaries. :-( Is there an appropriate flag to specify to the compiler that will cause __GXX_MERGED_TYPEINFO_NAMES to be defined as 1? I supposed I can just -D__GXX_MERGED_TYPEINFO_NAMES ... but I was under the impression that the __GXX_WHATEVER preprocessor defines shouldn't be twiddled by hand. Perhaps I'm mistaken about refraining from specifying -D__GXX_WHATEVER on the g++ command line? - - - - - - - - - - - - - - - - - - - - - Also (incidentally & unrelated to the above), it is very weird that __GXX_MERGED_TYPEINFO_NAMES has two different semantics. Specifying __GXX_MERGED_TYPEINFO_NAMES has two unrelated orthogonal effects: 1. are the before() and operator==() routines inline or function calls 2. are the before() and operator==() routines lightweight pointer compares or slightly more costly string compares I'd like to have inline routines using __builtin_strcmp. But I can imagine some situations where __builtin_strcmp is desired, but only as function calls and not inline. Unfortunately... __GXX_MERGED_TYPEINFO_NAMES == 0 means "strcmp & function calls". __GXX_MERGED_TYPEINFO_NAMES == 1 means "pointer compares & inline". There's no "strcmp & inline" (what I want), nor is there "pointer compares & function calls". Hmmmm. I'm using GCC 4.0.1, so perhaps this has been fixed by now. Sincerely, --Eljay
