Re: probably a misguided move against GCC and GPL
"The main motivation behind LLVM was a non-GPL compiler with non-GPL runtime libraries."
In fairness, Clang + LLVM has become popular because it's a more modern toolchain than gcc and it shows in many scenarios. The C++ compiler produces WAY better and more meaningful errors (it's even used as a linter in some IDEs like QT). And LLVM is a JIT runtime as well as emitting machine code to a variety of backends and object formats.