reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # clang-22 might not be officially released. Try a lower version if installation fails.
        git checkout 0a686b9c4f847dc21346df8e56d5b119918fefef
        b4 shazam https://lore.kernel.org/r/f0c1cbc9c2994a90113788cad57df1f32f9db45e.1754617360.git.Jonathan.Santos@analog.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-22 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash