On Thu, 07 Mar 2013 10:35:42 +0100 Kjell Ahlstedt <[email protected]> wrote: > If libsigc++ can't be built on Mac OS X I'd like to know why, and > what can be done about it. > The error messages says that no definition is available for > std::basic_ostream<>& std::operator<<(std::basic_ostream<>&, const > std::basic_string<>&). > I thought #include <iostream> should fix that. Is any other include > file necessary in OS X? > You can try with removing the SIGC_USING_STD macros. They are > unnecessary since many years. But I'd be surprised if it fixes your > problem.
Including <ostream>, which is where std::ostream/std::basic_ostream are defined, may do it. C++98 only requires <iostream> to declare the standard stream objects (not classes) (§27.3), which I guess it could do by only including <iosfwd>. <ostream> is also where operator::<<() for stream objects is declared. <istream> defines the std::istream/std::iostream/std::basic_istream/std::basic_iostream classes and templates and declares operator::>>(). C++11 seems to require <iostream> to include <ostream> (§27.4.1), so the -std=c++0x compiler flag may also have the desired effect. Chris _______________________________________________ libsigc-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/libsigc-list
