x11proto-gl-dev 1.4.17-1 (i386 binary) in ubuntu bionic

 This package provides development headers describing the wire protocol
 for OpenGL-related extensions, used to enable the rendering of
 applications using OpenGL.
 .
 More information about X.Org can be found at:
 <URL:http://www.X.org>
 .
 This package is built from the X.org glproto proto module.