libsigc++ implements a full callback system for use in abstract interfaces and general programming. libsigc++ is the most complete library of its kind with the ability to connect an abstract callback to a class method, function, or function object.

It contains adaptor classes for connecting dissimilar callbacks and has an ease of use unmatched by other C++ callback libraries.

Here are some key features of "Libsigc++":

· Compile time typesafe callbacks (faster than run time checks)
· Typesafety violations report line number correctly with template names (no tracing template failures into headers)
· No compiler extensions or meta compilers required
· Proper handling of dynamic objects and signals (deleted objects will not cause seg faults)
· Extendable API at any level: signal, slot, connection and trackable
· Extensions do not require alteration of basic components
· User definable accumulators
· A variety of adaptors to change the callback signature: bind, hide, retype, compose and lambda call groups
· Various compilers and platforms are supported: gcc, cygwin, mingw32, MS .NET 2003, Sun Forte C++, Compaq C++, Intel C++

libsigc++ is known to build and work with the following compilers:

· g++ (>= 3.2, including Apple and Cygwin versions)
· Microsoft Visual C++ .NET 2003
· Intel C++ compiler
· SUN Forte C++ CC
· IBM AIX xlC
· Tru64 C++
· IRIX MIPSpro