Install x11proto-dev by entering the following commands in the terminal:
sudo apt update sudo apt install x11proto-dev
Description:
X11 extension protocols and auxiliary headers
This package provides development headers describing the wire protocol for the X11 core and extension protocols, and also provides a number of utility headers, used to abstract OS-specific functions. . More information about X.Org can be found at:
Homepage: https://www.x.org/
Version: 2018.4-4
Section: x11