Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Newsletter Hub
Free Learning
Arrow right icon
timer SALE ENDS IN
0 Days
:
00 Hours
:
00 Minutes
:
00 Seconds
Embedded Linux Development with Yocto Project
Embedded Linux Development with Yocto Project

Embedded Linux Development with Yocto Project: Develop fascinating Linux-based projects using the groundbreaking Yocto Project tools

eBook
€10.99 €16.99
Paperback
€20.99
Subscription
Free Trial
Renews at €18.99p/m

What do you get with Print?

Product feature icon Instant access to your digital copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Redeem a companion digital copy on all Print orders
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Table of content icon View table of contents Preview book icon Preview Book

Embedded Linux Development with Yocto Project

Chapter 2. Baking Our Poky-based System

In this chapter, we will understand the basic concepts involved in the Poky workflow. Let's get our hands dirty with steps to download and configure, prepare the Poky build environment, and bake something usable. The steps covered here are commonly used for testing and development. They give us the whole experience of using Poky and a taste of its capabilities.

Configuring a host system

The process needed to set up our host system depends on the distribution we run on it. Poky has a set of supported Linux distributions, and if we are new to embedded Linux development, it is advisable to use one of the supported Linux distributions to avoid wasting time debugging build issues related to the host system support. Currently, the supported distributions are the following:

  • Ubuntu 12.04 (LTS)
  • Ubuntu 13.10
  • Ubuntu 14.04 (LTS)
  • Fedora release 19 (Schrödinger's Cat)
  • Fedora release 20 (Heisenbug)
  • CentOS release 6.4
  • CentOS release 6.5
  • Debian GNU/Linux 7.x (Wheezy)
  • openSUSE 12.2
  • openSUSE 12.3
  • openSUSE 13.1

If our preferred distribution is not in the preceding list, it doesn't mean it is not possible to use Poky on it. However, it is unknown whether it will work, and we may get unexpected results.

The packages that need to be installed into the host system vary from one distribution to another. Throughout this book, you find instructions for Debian and Fedora...

Downloading the Poky source code

After we install the needed packages into our development host system, we need to get the Poky source code that can be downloaded with Git, using the following command:

$: git clone git://git.yoctoproject.org/poky --branch daisy

Tip

Learn more about Git at http://git-scm.com.

After the download process is complete, we should have the following contents inside the poky directory:

Downloading the Poky source code

Note

The examples and code presented in this and the next chapters use the Yocto Project Version 1.6 and Poky Version 11.0. The code name is Daisy, as reference.

Preparing the build environment

Inside the poky directory, there is a script named oe-init-build-env, which should be used to set up the build environment. The script must be run as shown:

$: source poky/oe-init-build-env [build-directory]

Here, build-directory is an optional parameter for the name of the directory where the environment is set; in case it is not given, it defaults to build. The build-directory is the place where we perform the builds.

It is very convenient to use different build directories. We can work on distinct projects in parallel or different experimental setups without affecting our other builds.

Note

Throughout the book, we will use build as the build directory. When we need to point to a file inside the build directory, we will adopt the same convention, for example, build/conf/local.conf.

Knowing the local.conf file

When we initialize a build environment, it creates a file called build/conf/local.conf, which is a powerful tool that can configure almost every aspect of the build process. We can set the machine we are building for, choose the toolchain host architecture to be used for a custom cross-toolchain, optimize options for maximum build time reduction, and so on. The comments inside the build/conf/local.conf file are a very good documentation and reference of possible variables, and their defaults. The minimal set of variables we probably want to change from the default is the following:

BB_NUMBER_THREADS ?= "${@oe.utils.cpu_count()}"
PARALLEL_MAKE ?= "-j ${@oe.utils.cpu_count()}"
MACHINE ??= "qemux86"

Tip

BB_NUMBER_THREADS and PARALLEL_MAKE should be set to twice the host processor's number of cores.

The MACHINE variable is where we determine the target machine we wish to build for. At the time of writing this book, Poky supports the...

Building a target image

Poky provides several predesigned image recipes that we can use to build our own binary image. We can check the list of available images running the following command from the poky directory:

$: ls meta*/recipes*/images/*.bb

All the recipes provide images which are, in essence, a set of unpacked and configured packages, generating a filesystem that we can use on an actual hardware.

Next, we can see a short description of available images, as follows:

  • build-appliance-image: This is a virtual machine image which can be run by either VMware Player or VMware Workstation that allows to run builds.
  • core-image-full-cmdline: This is a console-only image with full support for the target device hardware.
  • core-image-minimal: This is a small image allowing a device to boot, and it is very useful for kernel and boot loader tests and development.
  • core-image-minimal-dev: This image includes all contents of the core-image-minimal image and adds headers and libraries that we can use in...

Configuring a host system


The process needed to set up our host system depends on the distribution we run on it. Poky has a set of supported Linux distributions, and if we are new to embedded Linux development, it is advisable to use one of the supported Linux distributions to avoid wasting time debugging build issues related to the host system support. Currently, the supported distributions are the following:

  • Ubuntu 12.04 (LTS)

  • Ubuntu 13.10

  • Ubuntu 14.04 (LTS)

  • Fedora release 19 (Schrödinger's Cat)

  • Fedora release 20 (Heisenbug)

  • CentOS release 6.4

  • CentOS release 6.5

  • Debian GNU/Linux 7.x (Wheezy)

  • openSUSE 12.2

  • openSUSE 12.3

  • openSUSE 13.1

If our preferred distribution is not in the preceding list, it doesn't mean it is not possible to use Poky on it. However, it is unknown whether it will work, and we may get unexpected results.

The packages that need to be installed into the host system vary from one distribution to another. Throughout this book, you find instructions for Debian and Fedora, our preferred...

Downloading the Poky source code


After we install the needed packages into our development host system, we need to get the Poky source code that can be downloaded with Git, using the following command:

$: git clone git://git.yoctoproject.org/poky --branch daisy

Tip

Learn more about Git at http://git-scm.com.

After the download process is complete, we should have the following contents inside the poky directory:

Note

The examples and code presented in this and the next chapters use the Yocto Project Version 1.6 and Poky Version 11.0. The code name is Daisy, as reference.

Left arrow icon Right arrow icon

Description

A practical tutorial guide which introduces you to the basics of Yocto Project, and also helps you with its real hardware use to boost your Embedded Linux-based project. If you are an embedded systems enthusiast and willing to learn about compelling features offered by the Yocto Project, then this book is for you. With prior experience in the embedded Linux domain, you can make the most of this book to efficiently create custom Linux-based systems.
Estimated delivery fee Deliver to Netherlands

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Jul 09, 2014
Length: 142 pages
Edition : 1st
Language : English
ISBN-13 : 9781783282333
Category :
Tools :

What do you get with Print?

Product feature icon Instant access to your digital copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Redeem a companion digital copy on all Print orders
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Estimated delivery fee Deliver to Netherlands

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Publication date : Jul 09, 2014
Length: 142 pages
Edition : 1st
Language : English
ISBN-13 : 9781783282333
Category :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
€18.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
€189.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts
€264.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total 99.97
Learning Embedded Linux using the Yocto Project
€36.99
Embedded Linux Projects Using Yocto Project Cookbook
€41.99
Embedded Linux Development with Yocto Project
€20.99
Total 99.97 Stars icon

Table of Contents

16 Chapters
1. Meeting the Yocto Project Chevron down icon Chevron up icon
2. Baking Our Poky-based System Chevron down icon Chevron up icon
3. Using Hob to Bake an Image Chevron down icon Chevron up icon
4. Grasping the BitBake Tool Chevron down icon Chevron up icon
5. Detailing the Temporary Build Directory Chevron down icon Chevron up icon
6. Assimilating Packaging Support Chevron down icon Chevron up icon
7. Diving into BitBake Metadata Chevron down icon Chevron up icon
8. Developing with the Yocto Project Chevron down icon Chevron up icon
9. Debugging with the Yocto Project Chevron down icon Chevron up icon
10. Exploring External Layers Chevron down icon Chevron up icon
11. Creating Custom Layers Chevron down icon Chevron up icon
12. Customizing Existing Recipes Chevron down icon Chevron up icon
13. Achieving GPL Compliance Chevron down icon Chevron up icon
14. Booting Our Custom Embedded Linux Chevron down icon Chevron up icon
A. References Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.9
(20 Ratings)
5 star 40%
4 star 20%
3 star 35%
2 star 0%
1 star 5%
Filter icon Filter
Top Reviews

Filter reviews by




Rikard Söderström Aug 27, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
It is a nice book, mostly a subset of the manual. Personally I bought it mostly to endorse the authors, since I think they do a great job. I am going to use this book for a competence group I am having at work. The Yocto project itself fulfills the individual members expectations on the outcome of the course. So this book will be a nice asset for them.I recommend this book for educational purposes and as a quick reference during development.
Amazon Verified review Amazon
John Tilghman May 12, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good book, would buy again.
Amazon Verified review Amazon
ALAN E BROWN Oct 21, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Comprehensive and informative
Amazon Verified review Amazon
Igor Mar 03, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Great Yocto boot camp manual. Gets you started and working in 15 minutes
Amazon Verified review Amazon
Rogerio Pimentel da Silva Aug 22, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Very nice book! It's clear, easy to understand. It has everything to start working with Yocto.
Amazon Verified review Amazon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is the digital copy I get with my Print order? Chevron down icon Chevron up icon

When you buy any Print edition of our Books, you can redeem (for free) the eBook edition of the Print Book you’ve purchased. This gives you instant access to your book when you make an order via PDF, EPUB or our online Reader experience.

What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
What is custom duty/charge? Chevron down icon Chevron up icon

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order? Chevron down icon Chevron up icon

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges? Chevron down icon Chevron up icon

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
How can I cancel my order? Chevron down icon Chevron up icon

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela