d8a2b06e20
Clang 11 doesn't have support for three-way-comparisons (<=>, "spaceship
operator", "consistent comparisons") and is older than `clangStdenv`.
`clangStdenv` is currently 12 on FreeBSD and Android and 16 on other
platforms:
32e718f00c/pkgs/top-level/all-packages.nix (L16629-L16644)
Let's start by removing Clang 11 from our distribution. Next we can
consider upgrading to Clang 17, which fully supports the spaceship
operator:
https://releases.llvm.org/17.0.1/tools/clang/docs/ReleaseNotes.html#what-s-new-in-clang-release