reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git/commit/?id=a76e4bfc4b3586b47ede8e83bdb6050cd6b16025
        git remote add deller-fbdev https://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git
        git fetch --no-tags deller-fbdev for-next-v7.1
        git checkout a76e4bfc4b3586b47ede8e83bdb6050cd6b16025

        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=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash