reproduce (this is a W=1 build):
        git remote add glemco https://gitlab.com/glemco/linux
        git fetch --no-tags glemco staging_rv_hybrid_automata
        git checkout 156c507ccabc31d6a60918a00fef988aa348ff4c
        # 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 kernel/trace/rv/