Chapter 2: Learning about Toolchains

The toolchain is the first element of embedded Linux and the starting point of your project. You will use it to compile all the code that will run on your device. The choices you make at this early stage will have a profound impact on the final outcome. Your toolchain should be capable of making effective use of your hardware by using the optimum instruction set for your processor. It should support the languages that you require and have a solid implementation of the Portable Operating System Interface (POSIX) and other system interfaces.

Your toolchain should remain constant throughout the project. In other words, once you have chosen your toolchain, it is important to stick with it. Changing compilers and development libraries in an inconsistent way during a project will lead to subtle bugs. That being said, it is still best to update your toolchain when security flaws or bugs are found.

Obtaining a toolchain can be as simple as downloading...