reproduce (this is a W=1 build):
        git remote add ebiggers https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git
        git fetch ebiggers crc-next
        git checkout ebiggers/crc-next
        b4 shazam https://lore.kernel.org/r/090c5f6603b1102c877c8649f7a6569f362bfe61.1794268279.git.wqu@suse.com

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash lib/crc/