Install libbelcard-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libbelcard-dev
Description:
VCard standard format manipulation library (development headers)
Belcard is a C++ library to manipulate VCard standard format. . The package is probably not useful outside the Belledonne Communications suite of libraries and programs. . This package contains the development headers.
Homepage: https://www.linphone.org
Version: 1.0.2-1
Section: universe/libdevel