System building : tools

• Different tools are available to automate the process of building a target system, including the kernel, and sometimes the toolchain.

• They automatically download, configure, compile and install all the components in the right order, sometimes after applying patches to fix cross-compiling issues.

• They already contain a large number of packages, that should fit your main requirements, and are easily extensible.

• The build becomes reproducible, which allows to easily change the configuration of some components, upgrade them, fix bugs, etc.