This directory was generated as follows:

    git clone -b master https://github.com/Dav1dde/glad
    cd glad
    python -m glad --out-path /path/to/mesa/demos/src/glad --api gl=,gles1=,gles2= --generator c
    python -m glad --out-path /path/to/mesa/demos/src/glad --api wgl= --spec=wgl --generator c

