Install libgrail-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libgrail-dev
Description:
Gesture Recognition And Instantiation Library - dev files
This library consists of an interface and tools for handling gesture recognition and gesture instantiation. Applications can use the grail callbacks to receive gesture primitives and raw input events from the underlying kernel device. . This package contains files that are needed to build applications.
Homepage: https://launchpad.net/grail
Version: 3.1.0+16.04.20160125-0ubuntu2
Section: universe/libdevel