Yocto Project - OSCON 7-17-2012

[ yoc-to ]The smallest unit of measure,equal to one septillionth (10-24). Agenda:  Introduction  Development Process  Getting Started  Q&A

Introduction

Introducing the Yocto Project → Overall Goals • Unify the embedded Linux development experience by providing consistent, interoperable tools, metadata, & processes on all popular architectures (ARM, Intel, MIPS, PowerPC) • Respond to the needs of embedded systems developers • Provide upstream resources for commercial providers • Encourage community involvement • Maintain community relationships • Test thoroughly & provide nightly build structure • Release on 6-month cadence Yocto Project presentation @ OSCON 20125 © 2012 The Linux Foundation. All rights reserved

Introducing the Yocto Project → Project Components • Build system – Poky reference system • BitBake (build tool) • OpenEmbedded Core (core metadata) • Core BSPs & layers • Creates reference distribution – Development tools • Application Development Toolkit & Eclipse IDE • Hob graphical interface – Related build tools • Cross-prelink, pseudo, swabber, autobuilder • Embedded Library: EGLIBC • Build Appliance • Reference projects Yocto Project presentation @ OSCON 20127 © 2012 The Linux Foundation. All rights reserved

Introducing the Yocto Project → Governance • Open source umbrella project • Organized under the Linux Foundation • Split governance model • Technical Leadership Team • Advisory Board made up of participating organizations Yocto Project presentation @ OSCON 20128 © 2012 The Linux Foundation. All rights reserved All logos are trademarks of their respective owners.

Introducing the Yocto Project → Governance: Roles Technical Team Advisory Board Voting Members Chief Architect Advocacy Subgroup Maintainers/Leaders Finance Subgroup Shared Maintainerships Infrastructure Subgroup Project & Team Management Systems Administrator Documentation, Build, QA Contributors Yocto Project presentation @ OSCON 20129 © 2012 The Linux Foundation. All rights reserved

Introducing the Yocto Project → Governance: Relationships The Linux Foundation Parent organization Upstream Projects Mutually beneficial OpenEmbedded Project It’s complicated The World It’s awesome Yocto Project presentation @ OSCON 201210 © 2012 The Linux Foundation. All rights reserved

Introducing the Yocto Project → Governance: Relationships upstream projects Technical Team Advisory Board Voting Members Chief Architect Advocacy Subgroup Maintainers/Leaders Finance Subgroup Shared Maintainerships Infrastructure Subgroup Project & Team Management Systems Administrator Documentation, Build, QA Contributors Yocto Project presentation @ OSCON 201211 © 2012 The Linux Foundation. All rights reserved All logos are trademarks of their respective owners.

Development

Development Process → Build System Components • BitBake: build engine, follows metadata instructions • Metadata: instructions for BitBake (recipes, classes, config files) • OpenEmbedded Core: core set of metadata for OE-based systems • Poky: a reference build system for the Yocto Project: includes BitBake & OpenEmbedded Core, produces reference distro • Package: software component in a package format • Image: final build output, often a kernel and root filesystem • Recipe: instructions on how to build a package • Layer: set of related recipes intended to fit alongside other layers • Cross-development tools or cross-compiler: tools that provide binary output for a different architecture from the one they run on • Toolchain: compiler, debugger, binary utilites, etc. designed to work together for a specific architecture • BSP: board support package, contains hardware-specific drivers and other components for a specific architecture, board, or chipset Yocto Project presentation @ OSCON 201214 © 2012 The Linux Foundation. All rights reserved

Development Process → Build System Components: BitBake • Build engine, originally derived from Portage • Relatively simple, highly configurable • Operates on metadata • Sequentially steps through tasks • Maintainership shared with OpenEmbedded Yocto Project presentation @ OSCON 201215 © 2012 The Linux Foundation. All rights reserved

Development Process → Build System Components: Layers • openembedded-core – Core classes and image recipes – QEMU-emulated machine definitions – Maintainership shared with OpenEmbedded • linux-yocto – Stable kernel at release time; moving to LTSI kernel • BSP layers – meta-intel: Intel processors and SoCs – meta-ti: Texas Instruments boards – meta-freescale: Freescale iMx development boards • Feature layers – meta-ivi – meta-rt • Many more (see git.yoctoproject.org) Yocto Project presentation @ OSCON 201216 © 2012 The Linux Foundation. All rights reserved

Development Process → Build System Components: Poky • Reference build system – a representation of the Yocto Project • Includes BitBake, openembedded-core • Can build multiple image types – core-image-minimal – core-image-base – core-image-sato Yocto Project presentation @ OSCON 201217 © 2012 The Linux Foundation. All rights reserved

Getting Started

Getting Started • Download • Configure your environment • Configure the image • Build & rebuild • A look at Hob Yocto Project presentation @ OSCON 201221 © 2012 The Linux Foundation. All rights reserved

Getting Started → Download • Tarball (packaged release): $ wget http://downloads.yoctoproject.org/releases/yocto/ yocto-1.2/poky-denzil-7.0.tar.bz2 $ tar xjf poky-denzil-7.0.tar.bz2 • Git (tip of master branch): $ git clone git://git.yoctoproject.org/poky.git • Virtual machine: $ wget http://downloads.yoctoproject.org/releases/yocto/ yocto-1.2/tools/Build_Appliance.zip Yocto Project presentation @ OSCON 201222 © 2012 The Linux Foundation. All rights reserved

Getting Started → Configure Your Environment • Install required packages (Ubuntu shown): $ sudo apt-get install sed wget subversion git-core coreutils unzip texi2html texinfo libsdl1.2-dev docbook-utils fop gawk python-pysqlite2 diffstat make gcc build-essential xsltproc g++ desktop-file-utils chrpath libgl1-mesa-dev libglu1-mesa-dev autoconf automake groff libtool xterm libxml-parser-perl • Set up environment variables: $ cd poky-denzil-7.0 $ ./oe-init-build-env ### Shell environment set up for builds. ###You can now run bitbake <target>‘ Common targets are: core-image-minimal core-image-sato meta-toolchain . . .23

Getting Started → Configure the Image # This file is your local configuration file and is where all local user settings # are placed. The comments in this file give some guide to the options a new user ... # Parallelism Options # # These two options control how much parallelism BitBake should use. The first # option determines how many tasks bitbake should run in parallel: # BB_NUMBER_THREADS = "8" # # The second option controls how many processes make should run in parallel when # running compile tasks: # PARALLEL_MAKE = "-j 8" ... # This sets the default machine to be qemux86 if no other machine is selected: MACHINE ??= "qemux86" Yocto Project presentation @ OSCON 201224 © 2012 The Linux Foundation. All rights reserved

Getting Started → Build & Rebuild Pseudo is not present but is required, building this first before the main build Parsing recipes: 100% |############################################################################################## ################################################################################| Time: 00:00:53 Parsing of 835 .bb files complete (0 cached, 835 parsed). 1135 targets, 19 skipped, 0 masked, 0 errors. Build Configuration: BB_VERSION = "1.15.2" TARGET_ARCH = "i586" TARGET_OS = "linux" MACHINE = "qemux86" DISTRO = "poky" DISTRO_VERSION = "1.2+snapshot-20120719" TUNE_FEATURES = "m32 i586" TARGET_FPU = "" meta meta-yocto = "master:99203edda6f0b09d817454d656c100b7a8806b18" NOTE: Resolving any missing task queue dependencies NOTE: Preparing runqueue NOTE: Executing SetScene Tasks NOTE: Executing RunQueue Tasks NOTE: Running task 1 of 63 (ID: 11, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_fetch) Yocto Project presentation @ OSCON 201225 © 2012 The Linux Foundation. All rights reserved

Getting Started → Build & Rebuild NOTE: Running task 1 of 63 (ID: 11, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_fetch) NOTE: package quilt-native-0.60-r0: task do_fetch: Started NOTE: package quilt-native-0.60-r0: task do_fetch: Succeeded NOTE: Running task 2 of 63 (ID: 7, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_unpack) NOTE: package quilt-native-0.60-r0: task do_unpack: Started NOTE: package quilt-native-0.60-r0: task do_unpack: Succeeded NOTE: Running task 3 of 63 (ID: 8, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_patch) NOTE: package quilt-native-0.60-r0: task do_patch: Started NOTE: package quilt-native-0.60-r0: task do_patch: Succeeded NOTE: Running task 4 of 63 (ID: 12, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_configure) NOTE: package quilt-native-0.60-r0: task do_configure: Started NOTE: package quilt-native-0.60-r0: task do_configure: Succeeded NOTE: Running task 5 of 63 (ID: 13, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_compile) NOTE: package quilt-native-0.60-r0: task do_compile: Started NOTE: package quilt-native-0.60-r0: task do_compile: Succeeded NOTE: Running task 6 of 63 (ID: 9, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_install) NOTE: package quilt-native-0.60-r0: task do_install: Started NOTE: package quilt-native-0.60-r0: task do_install: Succeeded NOTE: Running task 7 of 63 (ID: 10, /Mondo/poky/poky/meta/recipes-devtools/quilt/quilt-native_0.60.bb, do_populate_sysroot) NOTE: package quilt-native-0.60-r0: task do_populate_sysroot: Started NOTE: package quilt-native-0.60-r0: task do_populate_sysroot: Succeeded Yocto Project presentation @ OSCON 201226 © 2012 The Linux Foundation. All rights reserved

More information at yoctoproject.orgThank You!

Yocto Project - OSCON 7-17-2012

by Jeffrey Osier-Mixon on Jul 20, 2012

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Yocto Project - OSCON 7-17-2012 Presentation Transcript