Yep, had a bug very recently caused by splitting libllvm-dev and libclang-dev... guess what, libllvm-dev's CMake files depend on clang libs as they are all buil

Yep, had a bug very recently caused by splitting libllvm-dev and libclang-dev... guess what, libllvm-dev's CMake files depend on clang libs as they are all built together so if you only install libllvm-dev, find_package(clang) in CMake will error without any way to fix it from your code.