你能帮我在 Ubuntu 18.04 上安装 clang-14 吗？我认为我需要一个有效的存储库，因为 apt-get install clang-14 不起作用。
$ cat /etc/issue
Ubuntu 18.04 LTS \n \l
$ sudo apt-get update
Hit:1 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease
Reading package lists... Done
$ sudo apt-get install clang-14
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package clang-14
$ clang++ -v
clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5
Found …