3.1.1. BitBake

-3.1.1. BitBake

- BitBake is the tool at the heart of the OpenEmbedded build system and is responsible - for parsing the metadata, generating a list of tasks from it, - and then executing those tasks. - To see a list of the options BitBake supports, use the following help command: -

-     $ bitbake --help
-

- The most common usage for BitBake is bitbake <packagename>, where - packagename is the name of the package you want to build - (referred to as the "target" in this manual). - The target often equates to the first part of a .bb filename. - So, to run the matchbox-desktop_1.2.3.bb file, you - might type the following: -

-     $ bitbake matchbox-desktop
-

- Several different versions of matchbox-desktop might exist. - BitBake chooses the one selected by the distribution configuration. - You can get more details about how BitBake chooses between different - target versions and providers in the - "Preferences and Providers" section. -

- BitBake also tries to execute any dependent tasks first. - So for example, before building matchbox-desktop, BitBake - would build a cross compiler and eglibc if they had not already - been built. -

Note

This release of the Yocto Project does not support the glibc - GNU version of the Unix standard C library. By default, the OpenEmbedded build system - builds with eglibc.

- A useful BitBake option to consider is the -k or - --continue option. - This option instructs BitBake to try and continue processing the job as much - as possible even after encountering an error. - When an error occurs, the target that - failed and those that depend on it cannot be remade. - However, when you use this option other dependencies can still be processed. -