View source for ROS 2 Build System 20240524

== Create the dev tree ==

I have forgotten how to do this

  mkdir -f edc_ws/src

I think

  cd edc_ws/src

This didn't work

    $ catkin_make -j2
        Command 'catkin_make' not found, but can be installed with:
        sudo apt install catkin

This didn't help
<pre>
$ sudo apt install catkin
[sudo] password for eepp: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 python3-catkin-pkg : Conflicts: catkin but 0.8.10-7 is to be installed
 python3-catkin-pkg-modules : Conflicts: catkin but 0.8.10-7 is to be installed
E: Unable to correct problems, you have held broken packages.
</pre>

* [https://catkin-tools.readthedocs.io/en/latest/installing.html installing catkin]
I'll come back to this later