[jdmoreira]

What if I want to write a software renderer that implements the openGL api?

Or what if want to write a Vulkan to Metal like MoltenVK?

What if I want to write an interpreter for your bitcode?

What if I want to port soul secret source on top of Apple's Accelerate framework? Would you sue me to oblivion?

[cesaref]

The license is pretty clear, you can do anything you like with the language and the software that has been open sourced. If you want to write your own renderer, that's great! If you want to write a decent interpreter, or a rubbish one for that matter, again, that's great, that's your business.