Category: My Blog

Engineers working with embedded systems often encounter the GNU General Public License at some point in a project's lifecycle. Whether you are building a network switch, a medical monitor, or an industrial controller, the software running on that hardware frequently includes GPL-licensed components. Understanding what the GPL requires—and what it does not—is a matter of both legal compliance and engineering ethics. This guide walks through the mechanics of GPL licensing as they apply specifically to embedded devices. What the GPL Actually Says The GNU General Public License is a copyleft license. Unlike permissive licenses such as MIT or BSD, which allow code to be reused with minimal conditions, the GPL requires that derivative works be distributed under the same license. The core principle is straightforward: if you distribute a work…

I have spent the better part of a decade working with embedded Linux systems. From routers to medical devices, from smart home hubs to industrial controllers, the GNU General Public License is everywhere in the hardware world. And yet, compliance with it remains staggeringly poor. This is not a marginal concern. The GPL is one of the foundational legal instruments that makes open source sustainable, and when companies treat it as a suggestion rather than a license, the entire ecosystem suffers. The Scope of the Problem Let us start with some blunt facts. The Software Freedom Conservancy has documented hundreds of violations across dozens of companies. Many of these are repeat offenders. A router manufacturer ships a device with a modified Linux kernel and provides no source. A smart TV…