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You're reading from  Embedded Linux Development using Yocto Projects - Second Edition

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Published inNov 2017
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ISBN-139781788470469
Edition2nd Edition
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Authors (2):
Otavio Salvador
Otavio Salvador
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Otavio Salvador

Otavio Salvador loves technology and started his free software activities in 1999. In 2002, he founded O.S. Systems, a company focused on embedded system development services and consultancy worldwide, creating and maintaining customized BSPs, and helping companies with their product developments challenges. This resulted in his joining the OpenEmbedded community in 2008, when he became an active contributor to the OpenEmbedded project.
Read more about Otavio Salvador

Daiane Angolini
Daiane Angolini
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Daiane Angolini

Daiane Angolini has been working with embedded Linux since 2008. She has been working as an application engineer at NXP, acting on internal development, porting custom applications from Android, and on-site customer support for i.MX architectures in areas such as the Linux kernel, u-boot, Android, Yocto Project, and user-space applications. However, it was on the Yocto Project that she found her place.
Read more about Daiane Angolini

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Specifying runtime package dependencies


The end results of most recipes are packages that are managed by the package manager. As we saw in the previous sections, it requires information about all those packages and how they relate to each other. For example, a package may depend on or conflict with another.

There are multiple package constraints that need to be expressed; however, those constraints are package format-specific, so BitBake has a specific metadata set used to abstract those package constraints.

Here is a list of the most commonly used runtime constraints:

  • RDEPENDS: This is the list of packages that are required to be installed along with the package that defines it.
  • RPROVIDES: This is the list of symbolic names a package provides. By default, a package always includes the package name as a symbolic name. It can also include other symbolic names alternatively provided by that package.
  • RCONFLICTS: This is the list of packages that are known to conflict with this package. Only one...
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Embedded Linux Development using Yocto Projects - Second Edition
Published in: Nov 2017Publisher: ISBN-13: 9781788470469

Authors (2)

author image
Otavio Salvador

Otavio Salvador loves technology and started his free software activities in 1999. In 2002, he founded O.S. Systems, a company focused on embedded system development services and consultancy worldwide, creating and maintaining customized BSPs, and helping companies with their product developments challenges. This resulted in his joining the OpenEmbedded community in 2008, when he became an active contributor to the OpenEmbedded project.
Read more about Otavio Salvador

author image
Daiane Angolini

Daiane Angolini has been working with embedded Linux since 2008. She has been working as an application engineer at NXP, acting on internal development, porting custom applications from Android, and on-site customer support for i.MX architectures in areas such as the Linux kernel, u-boot, Android, Yocto Project, and user-space applications. However, it was on the Yocto Project that she found her place.
Read more about Daiane Angolini