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Binary kernel builds based on -rt branches of
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Binary kernel builds based on -rt branches of

Installing these builds can make your SD card non-bootable, so make sure to backup your current kernel build and any critical information on your SD card!

Downloading prebuilt archives

Go to, download one of the releases and extract it to /, for example:

# Back up current kernel first.
sudo cp /boot/kernel.img /boot/kernel.img.bak
sudo cp /boot/kernel7.img /boot/kernel7.img.bak

# Download and extract RT kernel.
wget -O kernel-rt.tar.gz
sudo tar -xvf kernel-rt.tar.gz --strip 1 -C /

Manual building


Set up the cross compiler toolchain as described on Install Toolchain section of


  1. Run ./
  2. Wait for ages
  3. The build result will be in build/ folder. build/lib contents should go to /lib/ and build/boot should go to /boot/ on the SD card.
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