[1ris]

Apple opensoucred their Objective-C compiler only because the GPL on the GCC forced them. They invested a lot in the BSD licenced LLVM. I don't think they did this just for fun, but to avoid they have to do that.

[allegory]

You do realise that the clang part of llvm includes the Objective C compiler and it's under the BSD license as well?

[pjmlp]

What good is the language without its libraries?

[ksherlock]

Objective gcc came from NeXT. Apple has a problem with GPLv3, not the GPL in general.

[hobarrera]

Apple has contributed back to a lot of BSD-licensed proyects, as well as released some of their own, so don't be so sure.