Disable case check for external headers and sources?

[Stehsaer]

As the title says, is there a way to disable clang-format feature for external headers and sources, while keeping enabled for my own headers and sources? It really bothers when you browse an external header or source for reference, tons of warnings flood you over.

[HighCommander4]

Could you elaborate please about what "case check" you are referring to and how to enable it? A code example always helps.

[Stehsaer]

Clarification

Sorry for the confusion. What I mean is the naming style.
For example:

• I'm currently using Leading_upper_snake_case as class names and lower_case for variable names across my whole codebase, but the sources code of external/third-party libraries usually come with different naming style.
• I have clangd's clang-tidy feature turned on:

  CheckOptions:
        readability-identifier-naming.VariableCase: lower_case
        readability-identifier-naming.ClassCase: Leading_upper_snake_case
        readability-identifier-naming.AbstractClassCase: Leading_upper_snake_case
        readability-identifier-naming.FunctionCase: lower_case
        readability-identifier-naming.MacroDefinitionCase: UPPER_CASE
        readability-identifier-naming.StructCase: Leading_upper_snake_case
        readability-identifier-naming.EnumCase: Leading_upper_snake_case
        readability-identifier-naming.EnumConstantCase: Leading_upper_snake_case

• When browsing external code, warnings keep popping out suggesting that the external code base is using a different naming style / identifier case style from mine.

Screenshot for illustrating the problem

My code

External Code

[HighCommander4]

You can scope clangd config file entries to a directory using PathMatch or PathExclude (https://clangd.llvm.org/config.html#if).

So, you could e.g. exclude directories containing third-party library code, or only include directories containing your own code.