libsigc: libsigc++-1.2.5
libsigc: 
libsigc: libsigc++ implements a typesafe callback system for standard C++.
libsigc: It allows you to define signals and to connect those signals to
libsigc: any callback function, either global or a member function, 
libsigc: regardless of whether it is static or virtual.
libsigc: 
libsigc: 
libsigc: 
libsigc: 
libsigc: