Linux Kernel Development Model and Compilation

Learn to build and compile your own kernel by fetching mainline sources from stable and long-term support repositories, and use both to mix and match kernel types.

Configure the kernel by creating or copying a default .config for your system, then run make all config to generate options, including new module choices, before building.

Learn how to compile the kernel by selecting a configuration from .config, building the kernel and required modules, and understanding the compilation and linking stages, warnings, and errors.

Explore how compiling the Linux kernel produces object files with architecture assembler code and how linking multiple objects shapes the build, including cc ld ar meanings and common mistakes.

Explore compiling the Linux kernel for different architectures by specifying the target architecture and using cross compilation toolchains with cross_compile variables.

Explore make targets and how to use make help to list cleaning, configuration, and generic targets; learn how architecture-specific and architecture-independent targets affect building an image and modules.

Learn how default configurations are created in Linux kernel development with defconfig and make, selecting architecture-specific contexts to copy options.

Compare .config and defconfig in the Linux kernel build. .config stores values for all options, including defaults, while defconfig contains only non-default values to guide conflict resolution.

Explore Linux kernel configuration workflows by using make all config and make config, a text-based, sequential prompt system with no backtracking, plus tips for saving and searching configurations.

Explore savedefconfig and how to create a minimal kernel configuration with only default values. Compare it with the default config and interpret warnings about conflicts and virtualization.

The diffconfig script compares kernel configuration files, copies the current config to .config_old, updates the active context, and highlights differences between configurations.

This lecture explains Linux kernel clean targets, including mccleen, improper, and macropod, and how each removes files differently, from preserving build support to deleting configurations, patches, and temporary files.

Install the built kernel modules by running make modules_install and make install, place modules in the proper filesystem locations, and update the bootloader (e.g., grub) before rebooting.

Configure the build to place output binaries and object files in a separate folder, enabling multiple configurations and architectures while keeping the source tree clean.

Learn to build only a specified portion or module of the kernel, using selective build steps, checking changes, and linking to create the module's static image.

Install the kernel by building and compiling the source, configuring options with menuconfig or oldconfig, then run make modules_install and make install to update the bootloader and system files.

Flash the latest Raspbian image onto a 32 GB microSD card for Raspberry Pi 3 by downloading the image from the Raspberry Pi site and writing it to the card.

Enable ssh on a Raspberry Pi 3 by mounting the boot partition, creating an empty ssh file, and accessing the device over the network via its IP for headless setup.

Demonstrates building the Linux kernel for Raspberry Pi 3 by preparing the cross-toolchain, configuring environment variables, compiling the kernel, creating an image, and updating boot and modules on the Pi.

Learn how to SSH into a Raspberry Pi 3 on a local network, handle password authentication, and access the device from a television-connected setup.

Expand the raspberry pi3 filesystem using rasberry config options to grow the filesystem when disk space is missing, noting that rebuilding your system may be required.

Discover how to cross compile a Linux kernel module using a makefile, configure architecture and cross compilers, and copy and install the build on a Raspberry Pi.