Apache 2 library inclusion into Stan Math--general policy case. Trip wire consensus decision

Developers
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We will allow Apache 2 license dependencies into Stan Math which is itself new BSD license. This impacts GPL2 licensed projects.

This is a trip wire consensus decision. Any reasonable objection shared in this thread by midnight September 14th anywhere on the planet will ‘trip’ a review, otherwise the proposal will be adopted. Description of the experimental trip wire process is at the post designated by: Licenses of dependencies

Extensive discussion of the proposal at the thread: Licenses of dependencies

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Walker issue raised, please clarify if needed.:

Breck

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Please edit the second sentence to say “This impacts GPL2 licensed projects.”

It does not impact GPL3 license projects (including those under the stan-dev GitHub repo) and does not impact projects that compile Stan programs at runtime (like brms, TMBstan, etc.)

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Done and thanks for catching it.

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Text is still the same

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Not on the issue over at Walker ;). Fixed here too now.

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Thanks for the notification. As GPL3 seems to be Apache2 compatible, I think I can just switch walker to that instead of GPL (≥ 2).

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So are we there now?

Deadline is well over. I haven’t heard any objections against the Apache 2.0 license.

Thus, I would assume we are good unless I have overlooked anything.

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The week has passed and no one objected. We’re now able to include Apache 2 licenses in Stan :)

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