macOS homebrew llvm clang tidy some checks are missing

Question

I have installed LLVM via brew on macOS with the below mentioned command:

brew install --with-toolchain llvm@3.9 

I would like to use clang-tidy but some checks are missing, for example misc-string-compare.

What could be the problem?

Answer 1

As far as I can see, misc-string-compare was introduced in LLVM 4.0