Installing LinuxCNC 2.9 on Raspberry Pi 4B with Preempt-RT kernel

looks cool - ha ha
thanks
RMS

After closer look at overclocking instabilities, I am leaning to conclusion that culprit might be in the wall transformer current deficiency.

@Alan
Few days ago, I have stumbled by calling “halcompile”, while trying making changes in userkin.comp

The $ sudo apt-get install linux-cnc will not work with our new kernel: Linux linuxcnc29 5.15.84-rt54-v8+ #1 SMP PREEMPT_RT Fri Dec 23 20:39:48 CET 2022 aarch64 GNU/Linux,
thus, we need to bring latest source from GitHub

With lovely receipt of installation brought by Alan, and already dependencies in our system in place the recipe for building linuxcnc-dev is below.

####################
Here are the steps:
Ideally like before git the branch in your /home/pi directory

$ git clone github.com/LinuxCNC/linuxcnc.git linuxcnc-dev

#after you git go to src

$ cd linuxcnc-dev/src
$ ./configure --help
$ ./autogen.sh

# To check what options are available invoke configure with –help
$ ./configure –help

#I have decided to use only additional three parameters

$ ./configure --with-realtime=uspace --with-boost=yes --with-libusb-1.0
$ make -j4
$ sudo make setuid
$ source ../scripts/rip-environment
$ runtests
$ linuxcnc

Above last cmd will invoke build “in place” a new version of linuxcnc.
LINUXCNC - 2.10.0~pre0

Note:
Linuxcnc-dev 2.10.0~pre0 is confined in own directory and is not interfering with previous deb install

Worth to mention to novice members that selection between versions is easy.
A fresh terminal window without setting rip-environment
$ linuxcnc
Brings LINUXCNC - 2.9.0~pre1

However, after dwelling into subfolder scripts of linuxcnc-dev and setting source like below
$ source rip-environment
Linuxcnc-dev 2.10.0~pre0 will be chosen instead.

I must admit when I started working with linuxcnc it was confusing at the beginning.

Alan perhaps you can complement your instructions with my notes, so everything will be more compact.

Thanks
RMS

alangibson wrote:

1. On Linux desktop computer

Everything in this section should be run on your Linux desktop computer. These commands were tested on Linux Mint 21, but any reasonably recent Debian distro should work.

1.1 Install Raspberry Pi Imager

Code:

sudo apt install rpi-imager

 

I just thought I'd mention that rpi-imager is not in Debian 13 for sure and I've not checked older Debian OS's.

Thanks for reminding folks about the Mesa Configuration Tool.

JT

I didn't get very far until I had an error...
JT

It is looking for Docker, although i wonder why, but
sudo apt install docker
should do just fine.