Read the BSD license. They definitely have a choice.

Fine for my downvotes. So many fanboys here, it's sickening. If you would have read the thread you may have guessed that i meant:

  - Webkit = LGPL = No Choice
  - LLVM because gcc is a no go (GPL)

Now, here some downvotes too, because i insulted your oh so holy Apple company, boohoo..