Risc-V Note

Befor start, it needs to install below packages in ubuntu environent
sudo apt-get install autoconf autogen automake autotools-dev bc bison build-essential curl device-tree-compiler flex gawk gperf libexpat1-dev libexpat-dev libfl-dev libgmp-dev libmpc-dev libmpfr-dev libtool libusb-1.0-0-dev patchutils pkg-config shtool texinfo zlib1g-dev python

autoreconf -i
for "cannot find install-sh, install.sh, or shtool" error