No, they are not considered "non-free". Not even by RMS. Please provide evidence. Unsurprisingly RMS prefers GPL over pushover licenses, especially when it c

No, they are not considered "non-free". Not even by RMS. Please provide evidence. Unsurprisingly RMS prefers GPL over pushover licenses, especially when it comes to Emacs and GCC, which he considers strategic tools in a fight against proprietary software. He has been opposed to depending on Clang when GCC is not suitable (again due to his fears that GCC would be used to build proprietary compilers), but this does not mean that he considers Clang to be non-free software.