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" 

Tip

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

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