1deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial main 2deb-src http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial main 3deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial main 4deb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial main 5deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-3.8 main 6deb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial-3.8 main 7deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-3.9 main 8deb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial-3.9 main 9deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-4.0 main 10deb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial-4.0 main 11