[okl]

Nope, it's not. At least not entirely: https://www.rtems.org/license -- and the ESA version is definitely GPL-licensed.

Nothing against you personally, but I would really appreciate if instead of stating a certain believe, you actually look it up and point out a source for that bit of information.

[LouisvilleGeek]

The project is moving to a two paragraph BSD license and is making great progress.

https://devel.rtems.org/ticket/3053