What should the custom version be in Buildroot?

What should the custom version be in Buildroot?

For example, set BR2_LINUX_KERNEL_CUSTOM_VERSION=y and BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE to the kernel version you tested with. It is recommended to use as much as possible upstream versions of the Linux kernel and bootloaders, and to use as much as possible default kernel and bootloader configurations.

What are the files in the boot directory in Buildroot?

The linux/ directory contains the Makefiles and associated files for the Linux kernel. The boot/ directory contains the Makefiles and associated files for the bootloaders supported by Buildroot. The system/ directory contains support for system integration, e.g. the target filesystem skeleton and the selection of an init system.

Do you need to install Linux utilities in Buildroot?

While Buildroot itself will build most host packages it needs for the compilation, certain standard Linux utilities are expected to be already installed on the host system. Below you will find an overview of the mandatory and optional packages (note that package names may vary between distributions).

How to create an external variable in Buildroot?

This can be done very easily in just a few steps: 1 First, create a new file named external.desc, at the root of your br2-external tree, with a single line defining the… 2 Then, change every occurence of BR2_EXTERNALin your br2-external tree with the new variable: $ find . -type f | xargs… More

How can I get modprobe to load a module?

I know modprobe uses a configuration file, but I can’t get it to load the module even after adding /path/to/module.ko to /etc/modules. What is the proper configuration? You can make a symbolic link of your module to the standard path, so depmod will see it and you’ll be able load it as any other module.

Where do I find the defconfig file in Buildroot?

This is because package selections are highly application-specific. Once you have a known working configuration, run make savedefconfig. This will generate a minimal defconfig file at the root of the Buildroot source tree. Move this file into the configs/ directory, and rename it _defconfig.

What are the sections of the Buildroot manual?

Typical sections are Architecture, Toolchain options (typically just linux headers version), Firmware, Bootloader, Kernel, and Filesystem. Always use fixed versions or commit hashes for the different components, not the “latest” version.

Where are the Buildroot Developer Days in the UK?

Buildroot Developer Days, 3-4 February 2014, Brussels, Belgium, after FOSDEM. Buildroot Developer Days, 26-27 October 2013, Edinburgh UK, after ELC-E. Buildroot Developer Days, 4-5 February 2013, Brussels Belgium, after FOSDEM.

Is there a default parallelism level in Buildroot?

Buildroot has always been capable of using parallel build on a per package basis: each package is built by Buildroot using make -jN (or the equivalent invocation for non-make-based build systems). The level of parallelism is by default number of CPUs + 1, but it can be adjusted using the BR2_JLEVEL configuration option.

How is the target variable generated in Buildroot?

Generate all the targets listed in the TARGETS variable. This variable is filled by all the individual components’ Makefiles. Generating these targets will trigger the compilation of the userspace packages (libraries, programs), the kernel, the bootloader and the generation of the root filesystem images, depending on the configuration.

What happens when an external toolchain is used in Buildroot?

When an external toolchain is used, this means checking the features of the external toolchain and importing it into the Buildroot environment. Generate all the targets listed in the TARGETS variable.

How to generate uimage in U-Boot source tree?

U-Boot FAQ 2.19 explains how to generate uImage; it’s fairly straightforward, using the mkimage utility in the U-Boot source tree: (You may need extra parameters indicating the load address.) Change gzip in the above example to none, and you’ll create a u-Boot compatible uncompressed image.

How are new packages integrated into Buildroot software?

This section covers how new packages (userspace libraries or applications) can be integrated into Buildroot. It also shows how existing packages are integrated, which is needed for fixing issues or tuning their configuration.

Can you add support for other boards to Buildroot?

You are welcome to add support for other boards to Buildroot too. To do so, you need to create a normal Buildroot configuration that builds a basic system for the hardware: (internal) toolchain, kernel, bootloader, filesystem and a simple BusyBox-only userspace.