Introducing Buildroot
The current versions of Buildroot are capable of building a toolchain, a bootloader, a kernel, and a root filesystem. It uses GNU Make as the principal build tool. There is good online documentation at https://buildroot.org/docs.html, including The Buildroot user manual at https://buildroot.org/downloads/manual/manual.html.
Background
Buildroot was one of the first build systems. It began as part of the uClinux and uClibc projects as a way of generating a small root filesystem for testing. It became a separate project in late 2001 and continued to evolve through to 2006, after which it went into a rather dormant phase. However, since 2009, when Peter Korsgaard took over stewardship, it has been developing rapidly, adding support for glibc-based toolchains and a greatly increased number of packages and target boards.
As a matter of interest, Buildroot is also the ancestor of another popular build system, OpenWrt (http://wiki.openwrt.org), which forked...
