Install libnetclasses-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libnetclasses-dev
Objective-C framework for socket programming with GNUstep (devel)
Netclasses is an easy to use interface to socket programming in Objective-C with GNUstep. The core netclasses supports virtually any protocol, but the distribution comes with everything needed for TCP/IP (opening ports, background connections, etc.). Netclasses seamlessly integrates into NSRunLoop, which means there should be no need for redesigning applications to use it. . This package contains the development files.