In previous chapters, we have already been using the standard SDK to build the U-Boot bootloader and the Linux kernel, so in this recipe we will focus on the extensible SDK and in particular in using devtool, a command-line tool that helps in the development of packages. The devtool utility supports a wide range of recipe types and build systems, including:

• Autotools
• CMake
• SCons
• qmake
• GNU Make (Makefile)
• Out-of-tree kernel module
• Binary package
• Node.js
• Python setuptools or distutils

We will see examples of some of the above in the rest of this chapter.