> Yeah, no. They contribute the same to LLVM -- and even more than they did with GCC--, while still nobody "compells" them.
This does not negate OP's statement, "The fact that we can see and examine the source [of the Objective-C compiler] is because of the GNU GPL." We have very well-documented and undisputed evidence that NeXT wanted to make the Objective-C compiler proprietary, and that they only backed down after the FSF lawyers determined that that would be a violation of the license.
As far as Apple's open source contributions, according to Saurik, they often fall short even when legally compelled, let alone their voluntary contributions: https://news.ycombinator.com/item?id=2083877
Yeah, no. They contribute the same to LLVM -- and even more than they did with GCC--, while still nobody "compells" them.
Plus Apple released lots of other Open Source stuff, even when not compelled by GPL. Nobody forced with respect to Darwin for example.