Ubuntu 20 C++ Project Init

 

Dockerfile

FROM ubuntu:focal-20220113

USER root

RUN apt-get update

RUN apt-get -y install ninja-build clang file make cmake gdb

RUN apt-get -y install git

CMD tail -F /dev/null  # so that it will not close

Raspberry Pi Stretch to Bullseye (2017 to 2021)

sudo nano /etc/apt/sources.list

change

deb http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-free rpi

to

deb http://raspbian.raspberrypi.org/raspbian/ bullseye main contrib non-free rpi
sudo apt update  # 950 packages can be upgraded
sudo apt upgrade
sudo reboot
lsb_rebease -d  # Linux 11 (bullseye) not Linux 8 (stretch)
cat /etc/debian_release  # Linux 11 (bullseye) not Linux 8 (stretch)

Raspberry Pi Gcc

sudo apt-get -y install gcc g++ ninja-build clang file make cmake gdb git
gcc --version  # version 10 not version 6
g++ -v # version 10 not version 6
clang --version  # version 11 not version 4

cmake --version # version 3.18, not so nice

# if see <optional> not found, likely g++ version 6 too old, need version 10 newer