reproduce (this is a W=1 build):
        # https://github.com/gourryinverse/linux/commit/cf3e52163565dce5fff0f9f15a92cbbd452fc470
        git remote add gourryinverse https://github.com/gourryinverse/linux
        git fetch --no-tags gourryinverse movable_gigantic
        git checkout cf3e52163565dce5fff0f9f15a92cbbd452fc470

        # clang-22 might not be officially released. Try a lower version if installation fails.
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # 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