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1. #Compile linux kernel install#
2. #Compile linux kernel 64 Bit#
3. #Compile linux kernel 32 bit#
4. #Compile linux kernel download#

In our case it should be a 5.4 kernel with Raspberry Pi modifications. To find the right branch we can list the kernel branches with git branch -a and we choose the branch which comes closest to the revision we see with uname -r. Therefore we just try to get as close as possible.

Unfortunately this information is missing for the Raspberry Pi.

#Compile linux kernel download#

If we download the kernel from the Toradex repo we can just do a simple checkout of this hash: # Don't do this if you work with a Raspberry git clone git checkout 1f43bce17a57 The number after -g is the short git hash. In comparison, Toradex would for example include the short git hash in their kernel build name: uname -r We don't know the exact version running on the Raspberry Pi because they don't include a git hash or unique tag name in the kernel version.

We want to clone the Raspberry Pi repository: git clone cd linux The SoC manufacturer as well as the SoM/CoM provider do some downstream modifications and provide their version in their own repository. It is often not clear from where the kernel comes from. Download the kernelĭownloading the right kernel can be a little bit tricky.

#Compile linux kernel install#

# 64 sudo apt-get install gcc-aarch64-linux-gnu On the build machine we do: # 32 sudo apt-get install gcc-arm-linux-gnueabihf

#Compile linux kernel 32 bit#

We can figure out the architecture by doing uname -m on the target: # 32 Bit $ uname -mįor the armv7l kernel we need to install the armhf version of gcc and for aarch64 the aarch64 version.

#Compile linux kernel 64 Bit#

If we have a Raspberry Pi it might run on a 64 bit or 32 bit kernel. We need to know for which architecture we want to compile. If we use a recent version of the kernel we can normally just use the latest toolchain provided by the distribution. On the build machine we need to install a cross compilation toolchain. Setupįirst we need to setup the build machine and download the kernel. On the Raspberry Pi I enabled ssh so that I can transfer files with scp. As an embedded device I use a Raspberry Pi 4 but the same concept works for TI AM335x, NXP iMX6/iMX8, etc. Just use the right package manager for your distro. This article provides a summary of the steps which have to be taken to compile the module.įor this article I use Ubuntu 20.10 on the build machine but it should work with other distributions too. Sometimes we want to compile a kernel module for an embedded device without replacing the kernel.