libsigcxx2

v 2.10.3

C++ signal callback system

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

https://libsigcplusplus.github.io/libsigcplusplus/

To install libsigcxx2, paste this in macOS terminal after installing MacPorts

sudo port install libsigcxx2

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