![]() Recipes describe dependencies for libraries or for other recipes, as well as configuration and compilation options. A recipe describes where you get source code and which patches to apply. A recipe will contain a list of settings and tasks (instructions) for building packages which are then used to build the binary image. Recipe: The most common form of metadata. They tell the build system what to build and put into the image to support a particular platform. There is also the OpenEmbedded layer index which contains more layers but the content is less universally validated.Ĭonfiguration Files: Files which hold global definitions of variables, user defined variables and hardware configuration information. Use BSP layers from silicon vendors when possible.įamiliarize yourself with the curated (tested) YOCTO PROJECT COMPATIBLE LAYER INDEX. Isolating information into layers, on the other hand, helps simplify future customizations and reuse. Putting your entire build into one layer limits and complicates future customization and reuse. As an example, you could have a BSP layer, a GUI layer, a distro configuration, middleware, or an application. Use different layers to logically separate information in your build. This powerful override capability is what allows you to customize previous collaborative or community supplied layers to suit your product requirements. Layers can contain changes to previous instructions or settings at any time. Users can collaborate, share, and reuse layers. Layers are repositories containing related sets of instructions which tell the build system what to do. The Layer Model is designed to support both collaboration and customization at the same time. Yocto Project has a development model for embedded Linux creation which distinguishes it from other simple build systems. The Layer Model – The Key To Customization You can alter, copy, extend, or use the Poky build specifics in any way you might need to in order to create your custom embedded Linux. The build system is downloaded with Poky build instruction “files” called recipes and layers (defined below). Poky, the reference embedded OS is actually a working BUILD EXAMPLE which will build a small embedded OS with the included build system (BitBake, the build engine and OpenEmbedded-Core, the core build system metadata). There are many different open source components and tools within the Yocto Project umbrella. tools security analysis and license compliance, software manifests (SBoM) support in SPDX.processes and standards for board support definitions and interchange.tools for automated building and testing.Integrated tools to make working with embedded Linux successful:.Extensive testing infrastructure through our Buildbot based autobuilder.A reference/example embedded Linux configuration used for testing (called Poky).The OpenEmbedded build system, co-maintained with the OpenEmbedded Project consisting of OpenEmbedded-Core and BitBake.The Yocto Project combines and maintains several key elements: Historically the project grew from, and works with the OpenEmbedded Project which is the build system the project uses and shares components with. The tools allow users to build and support customizations for multiple hardware platforms and software stacks in a maintainable and scalable way. This could be between suppliers and consumers of hardware or to allow collaboration in and around a software ecosystem for example. The project provides a standard to deliver hardware support and software stacks, allowing the interchange of software configurations and builds. The project provides a flexible set of tools and a space where embedded developers worldwide can share technologies, software stacks, configurations and best practices which can be used to create tailored Linux and RTOS images for embedded devices. ![]() The Yocto Project is an open source collaboration project that helps developers create custom Linux-based systems for embedded products and other targeted environments, regardless of the hardware architecture. Getting Started: The Yocto Project Overview
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