libsigc++: libsig++ (Typesafe Callback System for C++) libsigc++: libsigc++: Libsigc++ implements a typesafe callback system for standard C++. It libsigc++: allows you to define signals and to connect those signals to any libsigc++: callback function, either global or a member function, regardless of libsigc++: whether it is static or virtual. It also contains adaptor classes for libsigc++: connection of dissimilar callbacks and has an ease of use unmatched libsigc++: by other C++ callback libraries. Libsigc++ is licensed under the GNU libsigc++: Library General Public License, LGPL. libsigc++: libsigc++: