Khem Raj

are you using clang to compile kernel ?

`std::format` is a c++ 20 standards feature. So please add `-std=c++20` to CXXFLAGS or however you pass additional compiler flags to your components.

hmm rereading the comments again I see that you are using clang-14 (dunfell-clang14) do you see it with clang-16 or clang-17 as well ?

> Can we use that on dunfell? I'm afraid I don't see the branch for it We dont have anything newer than clang-14 for dunfell, but it would be a...

it is a not a simple task but yes it is desirable to get to use newer clang on older yocto release.

LLVMVERSION use is gone from recipes.

@varigigi thanks for report. The issue should be documented perhaps in README, that it depends on libstdc++ and g++ to be installed on build host and the versions should match...

I would suggest to use `dunfell-clang14` branch

yeah if possible swith to ubuntu 18.04 atleast.

I am guessing using ubuntu 18.04 solved the problem. if not please re-open.