GL XML Specs Licensing

[lunabunn]

Currently, glad-generated code is licensed under

Any of Public Domain, WTFPL or CC0.

However, the XML specs files for OpenGL are

Licensed under the Apache License, Version 2.0 (the "License");

Note that in vk.xml, there is an exception clause:

As an exception, if you use this Software to generate code and portions of
this Software are embedded into the generated code as a result, you may
redistribute such product without providing attribution as would otherwise
be required by Sections 4(a), 4(b) and 4(d) of the License.

...which is not present in, for instance, gl.xml.

Is this okay, legally? I don't know any specifics about licensing and I'm assuming it's okay, but just to be safe.

[lunabunn]

KhronosGroup/OpenGL-Registry#376 (comment)

Informally - understand that I am not speaking as a Khronos legal representative or binding the organization by saying this, just giving you a call as I see it, as the person most involved in these licensing issues - you are going to be OK using other licenses on your generated outputs. We don't have any interest in preventing people from using the XML. We do have an organizational structure that makes it take a very long time to get all the member companies to agree on licensing changes.

Closing as resolved, thanks Dav1dde!

[Dav1dde]

I'll re-open this as a reminder to update the readme and LICENSE/COPYING files