Install librsskit-dev by entering the following commands in the terminal:
sudo apt update sudo apt install librsskit-dev
Description:
GNUstep RSS framework (development files)
RSSKit is a GNUstep library (framework) for parsing and reading various RSS file formats. . This package contains the development files and API documentation.
Homepage: http://gap.nongnu.org/grr/
Version: 0.4-1build1
Section: universe/libdevel