reproduce (this is a W=1 build):
        git remote add perf-tools-next https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git
        git fetch perf-tools-next perf-tools-next
        git checkout perf-tools-next/perf-tools-next
        b4 shazam https://lore.kernel.org/r/20240120004247.42036-2-jdamato@fastly.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/