RaspberryPi3

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INSTALL RASPBERRY PI OS LEGACY (Debian 10 amd64 armhf) WITH DESKTOP ENVIRONMENT FROM THE PI IMAGER AND CONFIGURE SSH IN CASE YOU DONT HAVE DISPLAY


############################# BUILDING REALTIME KERNEL ##################################

sudo apt-get update
sudo apt-get install git bc mc libncurses5-dev
git clone --depth=1 https://github.com/raspberrypi/linux -b rpi-4.14.y-rt

cd linux
KERNEL=kernel7
make bcm2709_defconfig
make menuconfig

Kernel features | Preemption Model | FULLY PREEMPTABLE KERNEL #RT
exit
exit

make -j4 zImage modules dtbs //You can use -j3 or whatever number you want (if -j3, it will take around 5h to make)

sudo make modules_install
sudo cp arch/arm/boot/dts/.dtb /boot/
sudo cp arch/arm/boot/dts/overlays/.dtb* /boot/overlays/
sudo cp arch/arm/boot/dts/overlays/README /boot/overlays/
sudo cp arch/arm/boot/zImage /boot/$KERNEL.img

######################### BUILDING LINUXCNC##############################################

cd
git clone git://github.com/linuxcnc/linuxcnc.git linuxcnc-dev
sudo apt-get install dpkg-dev
cd linuxcnc-dev
git fetch origin 2.8
git checkout 2.8
cd debian

./configure uspace
cd ..

dpkg-checkbuilddeps

#BUILD LINUXCNC
cd
cd linuxcnc-dev/src

#REPEAT THIS TWO UNTIL ALL DEPENCIES ARE INSTALLED
./autogen.sh
./configure --with-realtime=uspace

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#IF YOUR SYSTEM RUNS OUT OF RAM, YOU CAN USE AN USB TO SET UP SWAP VIRTUAL MEMORY WITH THIS:
#FIND THE PARTITION YOU WANT TO USE AS SWAP MEMORY

sudo fdisk -l

#FORMAT THE PARTITION TO BE USED AS SWAP MEMORY

sudo mkswap /dev/sda1

#ACTIVATE THE SWAP PARTITION

sudo swapon /dev/sda1

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make
sudo make setuid

cd
cd linuxcnc-dev/
. scripts/rip-environment
linuxcnc

https://www.linuxcnc.org/dists/buster/2.8-rtpreempt/binary-armhf/linuxcnc-uspace_2.8.4_armhf.deb
https://www.linuxcnc.org/dists/buster/2.8-rtpreempt/binary-armhf/linuxcnc-uspace_2.8.1_armhf.deb

cd Downloads
sudo dpkg -i linuxcnc-uspace_2.8.4_armhf.deb

#Now you should be able to see the LinuxCNC on the main menu