libgccjit licensing question

[Timur Kristóf]

Hi,

Is libgccjit part of the GCC Runtime Library Exception?
Can I use libgccjit in a non-GPL (for example, MIT or Apache licensed)
project (without turning that project into GPL)? Can the authors of
proprietary software use it?

Thanks in advance for your answers!

Best regards,
Timur

ps. Sorry if this has been asked before, but I couldn't find any
definitive answers.