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Embedded Recipes 2017 - Introduction to Yocto Project/OpenEmbedded - Mylène Josserand

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Anne Nicolas

The document provides an overview of the Yocto Project and OpenEmbedded Core, focusing on the importance of build systems in embedded Linux development. It outlines the structure, capabilities, and advantages of using Yocto for creating customized, reproducible embedded systems, while discussing various system integration methods. Key practices for effective usage of the Yocto Project are also highlighted to aid developers in optimizing their embedded systems.

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Embedded Recipes Conference - 2017 Introduction to the Yocto Project / OpenEmbedded-core Mylène Josserand Free Electrons mylene@free-electrons.com Embedded Linux Experts Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 1/35
Mylène Josserand ▶ Embedded Linux engineer at Free Electrons since 2016 ▶ Embedded Linux expertise ▶ Development, consulting and training around the Yocto Project ▶ One of the authors of Free Electrons’ Yocto Project / OpenEmbedded training materials. ▶ Kernel contributor: audio driver, touchscreen, RTC and more to come! Embedded Linux Experts Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 2/35
Introduction ▶ In this talk, we will: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Introduction ▶ In this talk, we will: ▶ Understand why we should use a build system Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Introduction ▶ In this talk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Introduction ▶ In this talk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Introduction ▶ In this talk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Introduction ▶ In this talk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs ▶ Give some good practices to start using the Yocto Project correctly Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Introduction ▶ In this talk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs ▶ Give some good practices to start using the Yocto Project correctly ▶ Allows to customize many things: it is easy to do things the wrong way Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Introduction ▶ In this talk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs ▶ Give some good practices to start using the Yocto Project correctly ▶ Allows to customize many things: it is easy to do things the wrong way ▶ When you see a ✓, it means it is a good practice! Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
Why use a build system? Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
Why use a build system? ▶ In the Embedded world, we have many constraints Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
Why use a build system? ▶ In the Embedded world, we have many constraints ▶ Nice to reduce the system to a minimal one + add our custom application Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
Why use a build system? ▶ In the Embedded world, we have many constraints ▶ Nice to reduce the system to a minimal one + add our custom application ▶ A build system will automate the creation of the system in a reproducible way Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
Why use a build system? ▶ In the Embedded world, we have many constraints ▶ Nice to reduce the system to a minimal one + add our custom application ▶ A build system will automate the creation of the system in a reproducible way ▶ Integration means packaging applications to create a final image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
System integration: several possibilities ▶ Building everything manually: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size) Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility⊕ Built from source: customization and optimization are easy Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility⊕ Built from source: customization and optimization are easy⊕ Fully reproducible Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
System integration: several possibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility⊕ Built from source: customization and optimization are easy⊕ Fully reproducible⊕ Cross-compilation Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
Representation in the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project ▶ Common tasks defined in OpenEmbedded core Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project ▶ Common tasks defined in OpenEmbedded core ▶ Many recipes availables for many applications: organized in layers Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project ▶ Common tasks defined in OpenEmbedded core ▶ Many recipes availables for many applications: organized in layers ▶ Allow to build custom embedded Linux-based systems Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
Representation in the Yocto Project ▶ Common tasks defined in OpenEmbedded core ▶ Many recipes availables for many applications: organized in layers ▶ Allow to build custom embedded Linux-based systems ⇒ This is the aim of the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
OpenEmbedded core & Poky Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core ▶ Bitbake Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core ▶ Bitbake ▶ Additional layers Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
OpenEmbedded core & Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core ▶ Bitbake ▶ Additional layers ▶ Also contains some useful tools to ease recipes and layers’ creation Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
The Yocto Project / OpenEmbedded Core / Poky Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 8/35
Workflow - General Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 9/35
Workflow - General Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 9/35
Workflow - General Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 9/35
Workflow - Users/Developers actions Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 10/35
Workflow - 1. Download Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
Workflow - 1. Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
Workflow - 1. Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
Workflow - 1. Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community ▶ A codename corresponds to a Poky and Bitbake versions Pyro = Yocto Project v2.3 → Poky v17.0 & Bitbake v1.34 Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
Workflow - 1. Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community ▶ A codename corresponds to a Poky and Bitbake versions Pyro = Yocto Project v2.3 → Poky v17.0 & Bitbake v1.34 ▶ How to download: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
Workflow - 1. Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community ▶ A codename corresponds to a Poky and Bitbake versions Pyro = Yocto Project v2.3 → Poky v17.0 & Bitbake v1.34 ▶ How to download: git clone -b pyro git://git.yoctoproject.org/poky.git Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
Workflow - 1. Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
Workflow - 1. Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
Workflow - 1. Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ ▶ Download all other layers on same branch than Poky: Pyro Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
Workflow - 1. Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ ▶ Download all other layers on same branch than Poky: Pyro ✓ Use existing layers before creating a new one ⇒ saves you time Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
Workflow - 1. Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ ▶ Download all other layers on same branch than Poky: Pyro ✓ Use existing layers before creating a new one ⇒ saves you time ✓ DO NOT EDIT POKY/UPSTREAM LAYERS ⇒ complicates updates Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
Workflow - 2. Configure the build Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder build/ |-- conf |-- bblayers.conf |-- local.conf Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder build/ |-- conf |-- bblayers.conf |-- local.conf ▶ Edit your bblayers.conf with possible additional layers: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder build/ |-- conf |-- bblayers.conf |-- local.conf ▶ Edit your bblayers.conf with possible additional layers: BBLAYERS ?= " /home/mylene/yocto/poky/meta /home/mylene/yocto/poky/meta-poky /home/mylene/yocto/poky/meta-yocto-bsp /home/mylene/yocto/meta-freescale /home/mylene/yocto/meta-qt5 " Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... ▶ meta-angstrom: angstrom Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... ▶ meta-angstrom: angstrom ▶ Noticed that local.conf ⇒ only for the local workstation. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 2. Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... ▶ meta-angstrom: angstrom ▶ Noticed that local.conf ⇒ only for the local workstation. ✓ Avoid changes directly in local.conf (or only for test purposes, except for some variables such as MACHINE and DISTRO) Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
Workflow - 3. Build an image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
Workflow - 3. Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
Workflow - 3. Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ ▶ Common images already exist in Poky: core-image-minimal, core-image-base, core-image-x11, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
Workflow - 3. Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ ▶ Common images already exist in Poky: core-image-minimal, core-image-base, core-image-x11, ... ▶ Build an existing image: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
Workflow - 3. Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ ▶ Common images already exist in Poky: core-image-minimal, core-image-base, core-image-x11, ... ▶ Build an existing image: bitbake core-image-minimal Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
MACHINE/DISTRO/IMAGE: a little reminder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
MACHINE/DISTRO/IMAGE: a little reminder ▶ Machine: It represents your hardware conf/machine/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
MACHINE/DISTRO/IMAGE: a little reminder ▶ Machine: It represents your hardware conf/machine/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
MACHINE/DISTRO/IMAGE: a little reminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
MACHINE/DISTRO/IMAGE: a little reminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
MACHINE/DISTRO/IMAGE: a little reminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ ▶ Image: It represents your root filesystem itself: all your applications, libraries, configuration’s files, etc recipes-core/images Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
MACHINE/DISTRO/IMAGE: a little reminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ ▶ Image: It represents your root filesystem itself: all your applications, libraries, configuration’s files, etc recipes-core/images Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
Workflow - Developer Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 17/35
Workflow - 4. Create a layer Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> ✓ The layer’s name must be meta-* (done automatically using yocto-layer tool) Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> ✓ The layer’s name must be meta-* (done automatically using yocto-layer tool) ✓ Avoid uppercase and funny/long names Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 4. Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> ✓ The layer’s name must be meta-* (done automatically using yocto-layer tool) ✓ Avoid uppercase and funny/long names ✓ If you have different projects with common parts, try to create two layers ⇒ Can re-use some parts Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
Workflow - 5. Create a recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it ▶ It handles all the dependencies for you. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it ▶ It handles all the dependencies for you. ▶ Many common tasks are already defined by OpenEmbedded-core Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it ▶ It handles all the dependencies for you. ▶ Many common tasks are already defined by OpenEmbedded-core ▶ Organized in folders with the same purpose (recipes-core, recipes-bsp, recipes-kernel, recipes-devtool, recipes-support, ...) and a sub-folder with the application’s name Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
Workflow - 5. Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
Workflow - 5. Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
Workflow - 5. Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
Workflow - 5. Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
Workflow - 5. Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application ▶ The sources: where. Can be tarballs, remote repository, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
Workflow - 5. Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application ▶ The sources: where. Can be tarballs, remote repository, ... ▶ The tasks: how. How to proceed with the application’s sources Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
Workflow - 5. Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application ▶ The sources: where. Can be tarballs, remote repository, ... ▶ The tasks: how. How to proceed with the application’s sources ▶ Classes are available for tasks commonly used: kernel, CMake, autotools, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
Workflow - 5. Create a recipe recipes-support/nmon/nmon_13g.bb SUMMARY = "nmon performance monitor" HOMEPAGE = "http://nmon.sf.net" SECTION = "console/utils" LICENSE = "GPLv3" LIC_FILES_CHKSUM = "file://${WORKDIR}/Documentation.txt;md5=dbb13658cf55d687c4f2ff771a696d4a" DEPENDS = "ncurses" SRC_URI = "${SOURCEFORGE_MIRROR}/nmon/lmon13g.c;name=lmon ${SOURCEFORGE_MIRROR}/nmon/Documentation.txt;name=doc " SRC_URI[lmon.md5sum] = "b1b8e6c0123ad232394991f2d4f40494" SRC_URI[lmon.sha256sum] = "456ab2a342b31d1a352d0d940af5962fa65a12ae8757ff73e6e73210832ae8b5" SRC_URI[doc.md5sum] = "dbb13658cf55d687c4f2ff771a696d4a" SRC_URI[doc.sha256sum] = "1f7f83afe62a7210be5e83cd24157adb854c14599efe0b377a7ecca933869278" CFLAGS += "-D JFS -D GETUSER -Wall -D LARGEMEM" LDFLAGS += "-ltinfo -lncursesw" do_compile() { ${CC} ${CFLAGS} ${LDFLAGS} ${WORKDIR}/lmon13g.c -o nmon } do_install() { install -d ${D}${bindir} install -m 0755 nmon ${D}${bindir} } Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 21/35
Workflow - 5. Create a recipe recipes-support/nmon/nmon_13g.bb | SUMMARY = "nmon performance monitor" | HOMEPAGE = "http://nmon.sf.net" | SECTION = "console/utils" "Header" | LICENSE = "GPLv3" | LIC_FILES_CHKSUM = "file://${WORKDIR}/Documentation.txt;md5=dbb13658cf55d687c4f2ff771a696d4a" | DEPENDS = "ncurses" | SRC_URI = "${SOURCEFORGE_MIRROR}/nmon/lmon13g.c;name=lmon | ${SOURCEFORGE_MIRROR}/nmon/Documentation.txt;name=doc | " | SRC_URI[lmon.md5sum] = "b1b8e6c0123ad232394991f2d4f40494" "Source" | SRC_URI[lmon.sha256sum] = "456ab2a342b31d1a352d0d940af5962fa65a12ae8757ff73e6e73210832ae8b5" | SRC_URI[doc.md5sum] = "dbb13658cf55d687c4f2ff771a696d4a" | SRC_URI[doc.sha256sum] = "1f7f83afe62a7210be5e83cd24157adb854c14599efe0b377a7ecca933869278" | CFLAGS += "-D JFS -D GETUSER -Wall -D LARGEMEM" | LDFLAGS += "-ltinfo -lncursesw" | | do_compile() { | ${CC} ${CFLAGS} ${LDFLAGS} ${WORKDIR}/lmon13g.c -o nmon "Tasks" | } | | do_install() { | install -d ${D}${bindir} | install -m 0755 nmon ${D}${bindir} | } Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 22/35
Workflow - 5. Create a recipe recipes-example/helloworld/helloworld_1.0.bb DESCRIPTION = "Print a friendly, customizable greeting" HOMEPAGE = "https://www.gnu.org/software/hello/" PRIORITY = "optional" SECTION = "examples" LICENSE = "GPLv3" SRC_URI = "${GNU_MIRROR}/hello/hello-${PV}.tar.gz" SRC_URI[md5sum] = "67607d2616a0faaf5bc94c59dca7c3cb" SRC_URI[sha256sum] = "ecbb7a2214196c57ff9340aa71458e1559abd38f6d8d169666846935df191ea7" LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504" inherit autotools Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 23/35
Workflow - 5. Create a recipe recipes-example/helloworld/helloworld_1.0.bb | DESCRIPTION = "Print a friendly, customizable greeting" | HOMEPAGE = "https://www.gnu.org/software/hello/" "Header" | PRIORITY = "optional" | SECTION = "examples" | LICENSE = "GPLv3" | SRC_URI = "${GNU_MIRROR}/hello/hello-${PV}.tar.gz" "Source" | SRC_URI[md5sum] = "67607d2616a0faaf5bc94c59dca7c3cb" | SRC_URI[sha256sum] = "ecbb7a2214196c57ff9340aa71458e1559abd38f6d8d169666846935df191ea7" | LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504" "Tasks" | inherit autotools Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 24/35
Workflow - 5. Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
Workflow - 5. Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
Workflow - 5. Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
Workflow - 5. Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker ✓ Keep the headers / sources / tasks organization in the recipe ⇒ All the recipes have the same content organization Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
Workflow - 5. Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker ✓ Keep the headers / sources / tasks organization in the recipe ⇒ All the recipes have the same content organization ✓ Use/Create include files when possible ⇒ Can extend other versions easily Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
Workflow - 5. Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker ✓ Keep the headers / sources / tasks organization in the recipe ⇒ All the recipes have the same content organization ✓ Use/Create include files when possible ⇒ Can extend other versions easily ✓ Know how to compile the application manually before integrating it in a recipe ⇒ Saves you time Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
Workflow - 6. Extend a recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
Workflow - 6. Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
Workflow - 6. Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
Workflow - 6. Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
Workflow - 6. Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it ▶ The recipe extensions end in .bbappend Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
Workflow - 6. Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it ▶ The recipe extensions end in .bbappend ▶ Appended files must have the same root name as the recipe they extend example_0.1.bbappend applies to example_0.1.bb ⇒ version specific Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
Workflow - 6. Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it ▶ The recipe extensions end in .bbappend ▶ Appended files must have the same root name as the recipe they extend example_0.1.bbappend applies to example_0.1.bb ⇒ version specific ▶ If adding new files, you must prepend the FILESEXTRAPATHS variable with the path to files’ directory. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
Workflow - 6. Extend a recipe recipes-support/nmon/nmon_13g.bbappend FILESEXTRAPATHS_prepend := "${THISDIR}/files:" SRC_URI += "file://custom-modification-0.patch file://custom-modification-1.patch " do_install_append() { # Do something } . |--- conf | |-- layer.conf |--- recipes-support |--- nmon |-- files | |-- custom-modification-0.patch | |-- custom-modification-1.patch |-- nmon_13g.bbappend Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 27/35
Workflow - 7. Create an image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image ▶ An image is the top level recipe and is used alongside the machine definition Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb ▶ An image is no more than a recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb ▶ An image is no more than a recipe ▶ To create an image, simply create a .bb in an images folder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb ▶ An image is no more than a recipe ▶ To create an image, simply create a .bb in an images folder mkdir -p recipes-core/images/ touch recipes-core/images/core-image-fe.bb Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
Workflow - 7. Create an image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
Workflow - 7. Create an image ▶ Some special configuration variables are used to describe an image: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
Workflow - 7. Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
Workflow - 7. Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image IMAGE_FSTYPES List of formats the OpenEmbedded build system will use to create images Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
Workflow - 7. Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image IMAGE_FSTYPES List of formats the OpenEmbedded build system will use to create images ✓ Create a minimal image to include it in others ⇒ Allows to have a minimal rootfs Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
Workflow - 7. Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image IMAGE_FSTYPES List of formats the OpenEmbedded build system will use to create images ✓ Create a minimal image to include it in others ⇒ Allows to have a minimal rootfs ✓ Create different images according to your needs: image-minimal, image-dev, image-x11, image-qt5, etc ⇒ Install only what you really need for your board. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
Workflow - 7. Create an image recipes-core/images/core-image-fe.bb inherit core-image DESCRIPTION = "A small image to boot a device, created for Embedded Recipes" LICENSE = "MIT" IMAGE_FSTYPES = "tar.bz2 ext4" IMAGE_INSTALL = "packagegroup-core-boot nmon helloworld " Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 30/35
Workflow - 8. Create a machine Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use SERIAL_CONSOLE : Speed and device for the serial console to attach. Passed to the kernel as the console parameter, e.g. 115200 ttyS0 Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use SERIAL_CONSOLE : Speed and device for the serial console to attach. Passed to the kernel as the console parameter, e.g. 115200 ttyS0 KERNEL_IMAGETYPE : The type of kernel image to build, e.g. zImage Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use SERIAL_CONSOLE : Speed and device for the serial console to attach. Passed to the kernel as the console parameter, e.g. 115200 ttyS0 KERNEL_IMAGETYPE : The type of kernel image to build, e.g. zImage ✓ Describe your machine in a README file Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
Workflow - 8. Create a machine conf/machine/fe-machine.conf require conf/machine/include/soc-family.inc require conf/machine/include/tune-cortexa5.inc TARGET_ARCH = "arm" PREFERRED_PROVIDER_virtual/kernel ?= "linux-at91" PREFERRED_PROVIDER_virtual/bootloader ?= "u-boot-at91" KERNEL_IMAGETYPE = "zImage" KERNEL_DEVICETREE = "at91-sama5d3_xplained.dtb" SERIAL_CONSOLE ?= "115200 ttyS0" Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 32/35
Conclusion Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 33/35
Embedded Recipes Conference - 2017 Thank you for listening! Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 34/35
Questions? Mylène Josserand mylene@free-electrons.com Slides under CC-BY-SA 3.0 http://free-electrons.com/pub/conferences/2017/embedded-recipes/josserand-introduction-to-yocto- project/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 35/35

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Embedded Recipes 2017 - Introduction to Yocto Project/OpenEmbedded - Mylène Josserand

  • 1.
    Embedded Recipes Conference- 2017 Introduction to the Yocto Project / OpenEmbedded-core Mylène Josserand Free Electrons [email protected] Embedded Linux Experts Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 1/35
  • 2.
    Mylène Josserand ▶ EmbeddedLinux engineer at Free Electrons since 2016 ▶ Embedded Linux expertise ▶ Development, consulting and training around the Yocto Project ▶ One of the authors of Free Electrons’ Yocto Project / OpenEmbedded training materials. ▶ Kernel contributor: audio driver, touchscreen, RTC and more to come! Embedded Linux Experts Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 2/35
  • 3.
    Introduction ▶ In thistalk, we will: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 4.
    Introduction ▶ In thistalk, we will: ▶ Understand why we should use a build system Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 5.
    Introduction ▶ In thistalk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 6.
    Introduction ▶ In thistalk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 7.
    Introduction ▶ In thistalk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 8.
    Introduction ▶ In thistalk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs ▶ Give some good practices to start using the Yocto Project correctly Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 9.
    Introduction ▶ In thistalk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs ▶ Give some good practices to start using the Yocto Project correctly ▶ Allows to customize many things: it is easy to do things the wrong way Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 10.
    Introduction ▶ In thistalk, we will: ▶ Understand why we should use a build system ▶ How the Yocto Project / OpenEmbedded core are structured ▶ How we can use it ▶ How we can update it to fit our needs ▶ Give some good practices to start using the Yocto Project correctly ▶ Allows to customize many things: it is easy to do things the wrong way ▶ When you see a ✓, it means it is a good practice! Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/35
  • 11.
    Why use abuild system? Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
  • 12.
    Why use abuild system? ▶ In the Embedded world, we have many constraints Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
  • 13.
    Why use abuild system? ▶ In the Embedded world, we have many constraints ▶ Nice to reduce the system to a minimal one + add our custom application Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
  • 14.
    Why use abuild system? ▶ In the Embedded world, we have many constraints ▶ Nice to reduce the system to a minimal one + add our custom application ▶ A build system will automate the creation of the system in a reproducible way Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
  • 15.
    Why use abuild system? ▶ In the Embedded world, we have many constraints ▶ Nice to reduce the system to a minimal one + add our custom application ▶ A build system will automate the creation of the system in a reproducible way ▶ Integration means packaging applications to create a final image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 4/35
  • 16.
    System integration: severalpossibilities ▶ Building everything manually: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 17.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 18.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 19.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 20.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 21.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 22.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size) Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 23.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 24.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 25.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 26.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 27.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 28.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 29.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility⊕ Built from source: customization and optimization are easy Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 30.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility⊕ Built from source: customization and optimization are easy⊕ Fully reproducible Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 31.
    System integration: severalpossibilities ▶ Building everything manually: ⊕ Full flexibility⊗ Dependency hell⊗ Lack of reproducibility ▶ Binary distribution (Debian, Ubuntu, Fedora, etc): ⊕ Easy to create and extend⊗ Hard to customize and optimize (boot time, size)⊗ Hard to rebuild from source⊗ Native-compilation⊗ Not available for all architectures ▶ Build systems (Buildroot, the Yocto Project, etc): ⊗ Not as easy as a binary distribution⊕ Nearly full flexibility⊕ Built from source: customization and optimization are easy⊕ Fully reproducible⊕ Cross-compilation Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 5/35
  • 32.
    Representation in theYocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 33.
    Representation in theYocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 34.
    Representation in theYocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 35.
    Representation in theYocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 36.
    Representation in theYocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 37.
    Representation in theYocto Project ▶ Common tasks defined in OpenEmbedded core Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 38.
    Representation in theYocto Project ▶ Common tasks defined in OpenEmbedded core ▶ Many recipes availables for many applications: organized in layers Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 39.
    Representation in theYocto Project ▶ Common tasks defined in OpenEmbedded core ▶ Many recipes availables for many applications: organized in layers ▶ Allow to build custom embedded Linux-based systems Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 40.
    Representation in theYocto Project ▶ Common tasks defined in OpenEmbedded core ▶ Many recipes availables for many applications: organized in layers ▶ Allow to build custom embedded Linux-based systems ⇒ This is the aim of the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 6/35
  • 41.
    OpenEmbedded core &Poky Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 42.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 43.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 44.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 45.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 46.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 47.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 48.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 49.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 50.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core ▶ Bitbake Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 51.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core ▶ Bitbake ▶ Additional layers Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 52.
    OpenEmbedded core &Poky ▶ Co-maintained by the Yocto Project and OpenEmbedded Project ▶ Set of base layer with recipes and classes ▶ It is the core of all the magic ▶ It supports the ARM, MIPS (32 and 64 bits), PowerPC and x86 (32 and 64 bits) architectures + QEMU ▶ Reference distribution of the Yocto Project ▶ Contains everything you need to start a project: ▶ OpenEmbedded-core ▶ Bitbake ▶ Additional layers ▶ Also contains some useful tools to ease recipes and layers’ creation Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 7/35
  • 53.
    The Yocto Project/ OpenEmbedded Core / Poky Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 8/35
  • 54.
    Workflow - General FreeElectrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 9/35
  • 55.
    Workflow - General FreeElectrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 9/35
  • 56.
    Workflow - General FreeElectrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 9/35
  • 57.
    Workflow - Users/Developersactions Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 10/35
  • 58.
    Workflow - 1.Download Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
  • 59.
    Workflow - 1.Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
  • 60.
    Workflow - 1.Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
  • 61.
    Workflow - 1.Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community ▶ A codename corresponds to a Poky and Bitbake versions Pyro = Yocto Project v2.3 → Poky v17.0 & Bitbake v1.34 Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
  • 62.
    Workflow - 1.Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community ▶ A codename corresponds to a Poky and Bitbake versions Pyro = Yocto Project v2.3 → Poky v17.0 & Bitbake v1.34 ▶ How to download: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
  • 63.
    Workflow - 1.Download ▶ Find which version you want to use: Figure: https://wiki.yoctoproject.org/wiki/Releases ▶ Support level: Development, Stable, Community ▶ A codename corresponds to a Poky and Bitbake versions Pyro = Yocto Project v2.3 → Poky v17.0 & Bitbake v1.34 ▶ How to download: git clone -b pyro git://git.yoctoproject.org/poky.git Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 11/35
  • 64.
    Workflow - 1.Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
  • 65.
    Workflow - 1.Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
  • 66.
    Workflow - 1.Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ ▶ Download all other layers on same branch than Poky: Pyro Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
  • 67.
    Workflow - 1.Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ ▶ Download all other layers on same branch than Poky: Pyro ✓ Use existing layers before creating a new one ⇒ saves you time Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
  • 68.
    Workflow - 1.Download ▶ Layers are sets of recipes, matching a common purpose. To simplify things, they are just folders ▶ Look at existing layers Figure: http://layers.openembedded.org/layerindex/ ▶ Download all other layers on same branch than Poky: Pyro ✓ Use existing layers before creating a new one ⇒ saves you time ✓ DO NOT EDIT POKY/UPSTREAM LAYERS ⇒ complicates updates Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/35
  • 69.
    Workflow - 2.Configure the build Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 70.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 71.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 72.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 73.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 74.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 75.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder build/ |-- conf |-- bblayers.conf |-- local.conf Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 76.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder build/ |-- conf |-- bblayers.conf |-- local.conf ▶ Edit your bblayers.conf with possible additional layers: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 77.
    Workflow - 2.Configure the build ▶ A script with all variables needed by Bitbake must be sourced: source oe-init-build-env ▶ Will move you in a build folder ▶ Now, can run any commands ▶ All the local configurations are in the conf folder build/ |-- conf |-- bblayers.conf |-- local.conf ▶ Edit your bblayers.conf with possible additional layers: BBLAYERS ?= " /home/mylene/yocto/poky/meta /home/mylene/yocto/poky/meta-poky /home/mylene/yocto/poky/meta-yocto-bsp /home/mylene/yocto/meta-freescale /home/mylene/yocto/meta-qt5 " Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 13/35
  • 78.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 79.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 80.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 81.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 82.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 83.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 84.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 85.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 86.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... ▶ meta-angstrom: angstrom Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 87.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... ▶ meta-angstrom: angstrom ▶ Noticed that local.conf ⇒ only for the local workstation. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 88.
    Workflow - 2.Configure the build ▶ Edit local.conf with your MACHINE and your DISTRO ▶ MACHINE: Describes your hardware. Can find it under specific layers: BSP layers. Look at conf/machine/ folders ▶ poky: beaglebone, x86, x86-64 ▶ meta-ti: beagleboard, pandaboard, ... ▶ meta-fsl-arm: imx23, imx28, imx6, imx7, ... ▶ meta-atmel: at91*, sama5d*, ... ▶ DISTRO: Represents the top-level configuration that will apply to every build. It will include tools needed to use your hardware: compiler, libC, etc + some specific variables Look at conf/distro/ folders ▶ poky: poky, poky-tiny, ... ▶ meta-angstrom: angstrom ▶ Noticed that local.conf ⇒ only for the local workstation. ✓ Avoid changes directly in local.conf (or only for test purposes, except for some variables such as MACHINE and DISTRO) Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 14/35
  • 89.
    Workflow - 3.Build an image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
  • 90.
    Workflow - 3.Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
  • 91.
    Workflow - 3.Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ ▶ Common images already exist in Poky: core-image-minimal, core-image-base, core-image-x11, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
  • 92.
    Workflow - 3.Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ ▶ Common images already exist in Poky: core-image-minimal, core-image-base, core-image-x11, ... ▶ Build an existing image: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
  • 93.
    Workflow - 3.Build an image ▶ What is an IMAGE? ⇒ Represents your root filesystem: all your applications, libraries, configuration files, ... Will find it under recipes-*/images/ ▶ Common images already exist in Poky: core-image-minimal, core-image-base, core-image-x11, ... ▶ Build an existing image: bitbake core-image-minimal Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 15/35
  • 94.
    MACHINE/DISTRO/IMAGE: a littlereminder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
  • 95.
    MACHINE/DISTRO/IMAGE: a littlereminder ▶ Machine: It represents your hardware conf/machine/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
  • 96.
    MACHINE/DISTRO/IMAGE: a littlereminder ▶ Machine: It represents your hardware conf/machine/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
  • 97.
    MACHINE/DISTRO/IMAGE: a littlereminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
  • 98.
    MACHINE/DISTRO/IMAGE: a littlereminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
  • 99.
    MACHINE/DISTRO/IMAGE: a littlereminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ ▶ Image: It represents your root filesystem itself: all your applications, libraries, configuration’s files, etc recipes-core/images Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
  • 100.
    MACHINE/DISTRO/IMAGE: a littlereminder ▶ Machine: It represents your hardware conf/machine/ ▶ Distro: Represents the top-level configuration that will apply on every build conf/distro/ ▶ Image: It represents your root filesystem itself: all your applications, libraries, configuration’s files, etc recipes-core/images Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 16/35
  • 101.
    Workflow - Developer FreeElectrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 17/35
  • 102.
    Workflow - 4.Create a layer Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 103.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 104.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 105.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 106.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 107.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 108.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> ✓ The layer’s name must be meta-* (done automatically using yocto-layer tool) Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 109.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> ✓ The layer’s name must be meta-* (done automatically using yocto-layer tool) ✓ Avoid uppercase and funny/long names Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 110.
    Workflow - 4.Create a layer ▶ You may have custom hardware, need to update recipes from upstream layers, integrate your own application, etc ▶ Already said before: DO NOT EDIT POKY/UPSTREAM LAYERS ▶ To be able to do that, we will create our own layer that will host all our modifications/applications ▶ Poky provides a tool to create layers: yocto-layer create <layer_name> -o <dest_dir> ✓ The layer’s name must be meta-* (done automatically using yocto-layer tool) ✓ Avoid uppercase and funny/long names ✓ If you have different projects with common parts, try to create two layers ⇒ Can re-use some parts Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 18/35
  • 111.
    Workflow - 5.Create a recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 112.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 113.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 114.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 115.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 116.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 117.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it ▶ It handles all the dependencies for you. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 118.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it ▶ It handles all the dependencies for you. ▶ Many common tasks are already defined by OpenEmbedded-core Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 119.
    Workflow - 5.Create a recipe ▶ A recipe is a file describing tasks for an application to: ▶ retrieve its sources ▶ configure it ▶ compile it ▶ install it ▶ It handles all the dependencies for you. ▶ Many common tasks are already defined by OpenEmbedded-core ▶ Organized in folders with the same purpose (recipes-core, recipes-bsp, recipes-kernel, recipes-devtool, recipes-support, ...) and a sub-folder with the application’s name Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 19/35
  • 120.
    Workflow - 5.Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
  • 121.
    Workflow - 5.Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
  • 122.
    Workflow - 5.Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
  • 123.
    Workflow - 5.Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
  • 124.
    Workflow - 5.Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application ▶ The sources: where. Can be tarballs, remote repository, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
  • 125.
    Workflow - 5.Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application ▶ The sources: where. Can be tarballs, remote repository, ... ▶ The tasks: how. How to proceed with the application’s sources Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
  • 126.
    Workflow - 5.Create a recipe ▶ To create a recipe, you have to create a .bb file. It is the format that bitbake understands ▶ The format of a recipe file name is <application-name>_<version>.bb ▶ A recipe can be divided in three parts: ▶ The header: what/who. Description of the application ▶ The sources: where. Can be tarballs, remote repository, ... ▶ The tasks: how. How to proceed with the application’s sources ▶ Classes are available for tasks commonly used: kernel, CMake, autotools, ... Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 20/35
  • 127.
    Workflow - 5.Create a recipe recipes-support/nmon/nmon_13g.bb SUMMARY = "nmon performance monitor" HOMEPAGE = "http://nmon.sf.net" SECTION = "console/utils" LICENSE = "GPLv3" LIC_FILES_CHKSUM = "file://${WORKDIR}/Documentation.txt;md5=dbb13658cf55d687c4f2ff771a696d4a" DEPENDS = "ncurses" SRC_URI = "${SOURCEFORGE_MIRROR}/nmon/lmon13g.c;name=lmon ${SOURCEFORGE_MIRROR}/nmon/Documentation.txt;name=doc " SRC_URI[lmon.md5sum] = "b1b8e6c0123ad232394991f2d4f40494" SRC_URI[lmon.sha256sum] = "456ab2a342b31d1a352d0d940af5962fa65a12ae8757ff73e6e73210832ae8b5" SRC_URI[doc.md5sum] = "dbb13658cf55d687c4f2ff771a696d4a" SRC_URI[doc.sha256sum] = "1f7f83afe62a7210be5e83cd24157adb854c14599efe0b377a7ecca933869278" CFLAGS += "-D JFS -D GETUSER -Wall -D LARGEMEM" LDFLAGS += "-ltinfo -lncursesw" do_compile() { ${CC} ${CFLAGS} ${LDFLAGS} ${WORKDIR}/lmon13g.c -o nmon } do_install() { install -d ${D}${bindir} install -m 0755 nmon ${D}${bindir} } Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 21/35
  • 128.
    Workflow - 5.Create a recipe recipes-support/nmon/nmon_13g.bb | SUMMARY = "nmon performance monitor" | HOMEPAGE = "http://nmon.sf.net" | SECTION = "console/utils" "Header" | LICENSE = "GPLv3" | LIC_FILES_CHKSUM = "file://${WORKDIR}/Documentation.txt;md5=dbb13658cf55d687c4f2ff771a696d4a" | DEPENDS = "ncurses" | SRC_URI = "${SOURCEFORGE_MIRROR}/nmon/lmon13g.c;name=lmon | ${SOURCEFORGE_MIRROR}/nmon/Documentation.txt;name=doc | " | SRC_URI[lmon.md5sum] = "b1b8e6c0123ad232394991f2d4f40494" "Source" | SRC_URI[lmon.sha256sum] = "456ab2a342b31d1a352d0d940af5962fa65a12ae8757ff73e6e73210832ae8b5" | SRC_URI[doc.md5sum] = "dbb13658cf55d687c4f2ff771a696d4a" | SRC_URI[doc.sha256sum] = "1f7f83afe62a7210be5e83cd24157adb854c14599efe0b377a7ecca933869278" | CFLAGS += "-D JFS -D GETUSER -Wall -D LARGEMEM" | LDFLAGS += "-ltinfo -lncursesw" | | do_compile() { | ${CC} ${CFLAGS} ${LDFLAGS} ${WORKDIR}/lmon13g.c -o nmon "Tasks" | } | | do_install() { | install -d ${D}${bindir} | install -m 0755 nmon ${D}${bindir} | } Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 22/35
  • 129.
    Workflow - 5.Create a recipe recipes-example/helloworld/helloworld_1.0.bb DESCRIPTION = "Print a friendly, customizable greeting" HOMEPAGE = "https://www.gnu.org/software/hello/" PRIORITY = "optional" SECTION = "examples" LICENSE = "GPLv3" SRC_URI = "${GNU_MIRROR}/hello/hello-${PV}.tar.gz" SRC_URI[md5sum] = "67607d2616a0faaf5bc94c59dca7c3cb" SRC_URI[sha256sum] = "ecbb7a2214196c57ff9340aa71458e1559abd38f6d8d169666846935df191ea7" LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504" inherit autotools Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 23/35
  • 130.
    Workflow - 5.Create a recipe recipes-example/helloworld/helloworld_1.0.bb | DESCRIPTION = "Print a friendly, customizable greeting" | HOMEPAGE = "https://www.gnu.org/software/hello/" "Header" | PRIORITY = "optional" | SECTION = "examples" | LICENSE = "GPLv3" | SRC_URI = "${GNU_MIRROR}/hello/hello-${PV}.tar.gz" "Source" | SRC_URI[md5sum] = "67607d2616a0faaf5bc94c59dca7c3cb" | SRC_URI[sha256sum] = "ecbb7a2214196c57ff9340aa71458e1559abd38f6d8d169666846935df191ea7" | LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504" "Tasks" | inherit autotools Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 24/35
  • 131.
    Workflow - 5.Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
  • 132.
    Workflow - 5.Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
  • 133.
    Workflow - 5.Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
  • 134.
    Workflow - 5.Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker ✓ Keep the headers / sources / tasks organization in the recipe ⇒ All the recipes have the same content organization Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
  • 135.
    Workflow - 5.Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker ✓ Keep the headers / sources / tasks organization in the recipe ⇒ All the recipes have the same content organization ✓ Use/Create include files when possible ⇒ Can extend other versions easily Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
  • 136.
    Workflow - 5.Create a recipe ✓ Always use remote repositories to host your application sources ⇒ Makes development quicker + keep history ✓ Do not put application sources in your layer directly! ⇒ Application development ̸= Application Integration ✓ Keep the same folder organization: recipes-core/recipes-bsp/recipes-devtools/... ⇒ Find recipes quicker ✓ Keep the headers / sources / tasks organization in the recipe ⇒ All the recipes have the same content organization ✓ Use/Create include files when possible ⇒ Can extend other versions easily ✓ Know how to compile the application manually before integrating it in a recipe ⇒ Saves you time Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 25/35
  • 137.
    Workflow - 6.Extend a recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
  • 138.
    Workflow - 6.Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
  • 139.
    Workflow - 6.Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
  • 140.
    Workflow - 6.Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
  • 141.
    Workflow - 6.Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it ▶ The recipe extensions end in .bbappend Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
  • 142.
    Workflow - 6.Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it ▶ The recipe extensions end in .bbappend ▶ Appended files must have the same root name as the recipe they extend example_0.1.bbappend applies to example_0.1.bb ⇒ version specific Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
  • 143.
    Workflow - 6.Extend a recipe ▶ It is a good practice not to modify recipes available in Poky. ▶ But it is sometimes useful to modify an existing recipe ▶ The BitBake build engine allows to modify a recipe by extending it ▶ The recipe extensions end in .bbappend ▶ Appended files must have the same root name as the recipe they extend example_0.1.bbappend applies to example_0.1.bb ⇒ version specific ▶ If adding new files, you must prepend the FILESEXTRAPATHS variable with the path to files’ directory. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 26/35
  • 144.
    Workflow - 6.Extend a recipe recipes-support/nmon/nmon_13g.bbappend FILESEXTRAPATHS_prepend := "${THISDIR}/files:" SRC_URI += "file://custom-modification-0.patch file://custom-modification-1.patch " do_install_append() { # Do something } . |--- conf | |-- layer.conf |--- recipes-support |--- nmon |-- files | |-- custom-modification-0.patch | |-- custom-modification-1.patch |-- nmon_13g.bbappend Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 27/35
  • 145.
    Workflow - 7.Create an image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 146.
    Workflow - 7.Create an image ▶ An image is the top level recipe and is used alongside the machine definition Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 147.
    Workflow - 7.Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 148.
    Workflow - 7.Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 149.
    Workflow - 7.Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 150.
    Workflow - 7.Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb ▶ An image is no more than a recipe Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 151.
    Workflow - 7.Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb ▶ An image is no more than a recipe ▶ To create an image, simply create a .bb in an images folder Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 152.
    Workflow - 7.Create an image ▶ An image is the top level recipe and is used alongside the machine definition ▶ Whereas the machine describes the hardware used and its capabilities, the image is architecture agnostic and defines how the root filesystem is built, with what packages ▶ By default, several images are provided in Poky: ▶ meta*/recipes*/images/*.bb ▶ An image is no more than a recipe ▶ To create an image, simply create a .bb in an images folder mkdir -p recipes-core/images/ touch recipes-core/images/core-image-fe.bb Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 28/35
  • 153.
    Workflow - 7.Create an image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
  • 154.
    Workflow - 7.Create an image ▶ Some special configuration variables are used to describe an image: Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
  • 155.
    Workflow - 7.Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
  • 156.
    Workflow - 7.Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image IMAGE_FSTYPES List of formats the OpenEmbedded build system will use to create images Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
  • 157.
    Workflow - 7.Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image IMAGE_FSTYPES List of formats the OpenEmbedded build system will use to create images ✓ Create a minimal image to include it in others ⇒ Allows to have a minimal rootfs Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
  • 158.
    Workflow - 7.Create an image ▶ Some special configuration variables are used to describe an image: IMAGE_INSTALL List of packages to install in the generated image IMAGE_FSTYPES List of formats the OpenEmbedded build system will use to create images ✓ Create a minimal image to include it in others ⇒ Allows to have a minimal rootfs ✓ Create different images according to your needs: image-minimal, image-dev, image-x11, image-qt5, etc ⇒ Install only what you really need for your board. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 29/35
  • 159.
    Workflow - 7.Create an image recipes-core/images/core-image-fe.bb inherit core-image DESCRIPTION = "A small image to boot a device, created for Embedded Recipes" LICENSE = "MIT" IMAGE_FSTYPES = "tar.bz2 ext4" IMAGE_INSTALL = "packagegroup-core-boot nmon helloworld " Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 30/35
  • 160.
    Workflow - 8.Create a machine Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 161.
    Workflow - 8.Create a machine ▶ A machine describes your hardware Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 162.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 163.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 164.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 165.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 166.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 167.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use SERIAL_CONSOLE : Speed and device for the serial console to attach. Passed to the kernel as the console parameter, e.g. 115200 ttyS0 Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 168.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use SERIAL_CONSOLE : Speed and device for the serial console to attach. Passed to the kernel as the console parameter, e.g. 115200 ttyS0 KERNEL_IMAGETYPE : The type of kernel image to build, e.g. zImage Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 169.
    Workflow - 8.Create a machine ▶ A machine describes your hardware ▶ Stored under meta-<bsp_name>/conf/machine/*.conf ▶ The file name corresponds to the value set in the MACHINE variable meta-ti/conf/machine/beaglebone.conf MACHINE = "beaglebone" ▶ Contains configuration variables related to the architecture, to machine’s features and to customize the kernel image or the filesystems used. TARGET_ARCH : The architecture of the device being built PREFERRED_PROVIDER_virtual/kernel : The kernel recipe to use SERIAL_CONSOLE : Speed and device for the serial console to attach. Passed to the kernel as the console parameter, e.g. 115200 ttyS0 KERNEL_IMAGETYPE : The type of kernel image to build, e.g. zImage ✓ Describe your machine in a README file Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 31/35
  • 170.
    Workflow - 8.Create a machine conf/machine/fe-machine.conf require conf/machine/include/soc-family.inc require conf/machine/include/tune-cortexa5.inc TARGET_ARCH = "arm" PREFERRED_PROVIDER_virtual/kernel ?= "linux-at91" PREFERRED_PROVIDER_virtual/bootloader ?= "u-boot-at91" KERNEL_IMAGETYPE = "zImage" KERNEL_DEVICETREE = "at91-sama5d3_xplained.dtb" SERIAL_CONSOLE ?= "115200 ttyS0" Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 32/35
  • 171.
    Conclusion Free Electrons -Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 33/35
  • 172.
    Embedded Recipes Conference- 2017 Thank you for listening! Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 34/35
  • 173.
    Questions? Mylène Josserand [email protected] Slides underCC-BY-SA 3.0 http://free-electrons.com/pub/conferences/2017/embedded-recipes/josserand-introduction-to-yocto- project/ Free Electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 35/35