rpi-rp2-gcc
Get the SDK and Examples
$ cd pico-volume-root
$ ./get-sdk-and-examples.sh
Cloning into 'pico-sdk'...
Setup the Toolchain
$ docker-compose build pico
Building pico
...
Successfully tagged rpi-rp2-gcc_pico:latest
Build the Examples
$ docker-compose run pico
# cd /root/pico/pico-examples
# mkdir -p build && cd $_
# cmake ..
# cd blink
# make -j4
Now you have blink.uf2 in pico-examples/build/blink/, and you can drag and drop it into RPI-RP2 to load it.