Book Image

Embedded Linux Development with Yocto Project

Book Image

Embedded Linux Development with Yocto Project

Overview of this book

Table of Contents (22 chapters)
Embedded Linux Development with Yocto Project
About the Authors
About the Reviewers

Changing recipe feature configuration

One supported mechanism to ease feature-set customization for recipes is PACKAGECONFIG. It provides a way to enable and disable the recipe features. For example, if the recipe has the following configuration:

PACKAGECONFIG ?= "feature1" 
PACKAGECONFIG[feature1] = "--enable-feature1,--disable-  feature1,feature1depends" 
PACKAGECONFIG[feature2] = "--enable-feature2,--disable-  feature2,feature2depends" 

The recipe has two features, feature1 and feature2. For each configuration option, there is a string to define how to enable the feature on autoconf, how to disable the feature on autoconf, and the new dependencies in case the option is enabled.

We can create a .bbappend file that expands the PACKAGECONFIG variable's default value to enable feature2 as well, as shown:

PACKAGECONFIG += "feature2" 


In order to add the same feature in the build/conf/local.conf file, we can use PACKAGECONFIG_pn-<recipename>_append = 'feature2'.

More detailed information...