Install libsignon-qt5-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libsignon-qt5-dev
Description:
Development files for libsignon-qt
Headers and static libraries for the libsignon-qt library
Homepage: http://code.google.com/p/accounts-sso/
Version: 8.59+17.10.20170606-0ubuntu1
Section: universe/libdevel