Toolchain

First, install the depdencies:

• autoconf
• automake
• autotools-dev
• bc
• bison
• build-essential
• curl
• flex
• gawk
• gperf
• libexpat-dev
• libgmp-dev
• libmpc-dev
• libmpfr-dev
• libtool
• patchutils
• texinfo
• zlib1g-dev

On Debian:

sudo apt-get install autoconf automake autotools-dev curl libmpc-dev      \
     libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf \
     libtool patchutils bc zlib1g-dev libexpat-dev

Clone the repo:

git clone --recursive https://github.com/kendryte/kendryte-gnu-toolchain

Note that the toolchains this pulls done are large downloads and will take a while to pull down.

Next, set up /opt/kendryte-toolchain:

sudo mkdir /opt/kendryte-toolchain && sudo chown -R kyle:kyle /opt/kendryte-toolchain

Build and go make a pot of coffee and ride bikes or something (this takes a uint64_t time):

cd kendryte-gnu-toolchain/riscv-gcc &&  ./contrib/download_prerequisites && \
cd .. && ./configure --prefix=/opt/kendryte-toolchain --with-cmodel=medany \
--with-arch=rv64imafc --with-abi=lp64f && make -j8

Clone the standalone SDK and build the hello_world project:

cd .. && git clone https://github.com/kendryte/kendryte-standalone-sdk && \
cd kendryte-standalone-sdk && mkdir build && cd build && \
cmake .. -DPROJ=hello_world -DTOOLCHAIN=/opt/kendryte-toolchain/bin && make

Now to flash the image, install the flash tool:

cd .. && git clone https://github.com/sipeed/kflash.py && \
cd kflash.py && pip3 install --user .

Go back to the standalone SDK directory and flash the image:

cd ../kendryte-standalone-sdk/build && \
kflash -B maixduino -S SLOW -p /dev/ttyUSB0 hello_world.bin

NOTE: there's board options for the bit and the bit_mic - but for some reason it's detected as maixduino. Yeah, well, you know, that's just like your opinion, man.

Onwards and upwards...