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.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
****************
Variable Context
****************
While you can use most variables in almost any context such as
``.conf``, ``.bbclass``, ``.inc``, and ``.bb`` files, some variables are
often associated with a particular locality or context. This chapter
describes some common associations.
.. _ref-varlocality-configuration:
Configuration
=============
The following subsections provide lists of variables whose context is
configuration: distribution, machine, and local.
.. _ref-varlocality-config-distro:
Distribution (Distro)
---------------------
This section lists variables whose configuration context is the
distribution, or distro.
- :term:`DISTRO`
- :term:`DISTRO_NAME`
- :term:`DISTRO_VERSION`
- :term:`MAINTAINER`
- :term:`PACKAGE_CLASSES`
- :term:`TARGET_OS`
- :term:`TARGET_FPU`
- :term:`TCMODE`
- :term:`TCLIBC`
.. _ref-varlocality-config-machine:
Machine
-------
This section lists variables whose configuration context is the machine.
- :term:`TARGET_ARCH`
- :term:`SERIAL_CONSOLES`
- :term:`PACKAGE_EXTRA_ARCHS`
- :term:`IMAGE_FSTYPES`
- :term:`MACHINE_FEATURES`
- :term:`MACHINE_EXTRA_RDEPENDS`
- :term:`MACHINE_EXTRA_RRECOMMENDS`
- :term:`MACHINE_ESSENTIAL_EXTRA_RDEPENDS`
- :term:`MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS`
.. _ref-varlocality-config-local:
Local
-----
This section lists variables whose configuration context is the local
configuration through the ``local.conf`` file.
- :term:`DISTRO`
- :term:`MACHINE`
- :term:`DL_DIR`
- :term:`BBFILES`
- :term:`EXTRA_IMAGE_FEATURES`
- :term:`PACKAGE_CLASSES`
- :term:`BB_NUMBER_THREADS`
- :term:`BBINCLUDELOGS`
- :term:`ENABLE_BINARY_LOCALE_GENERATION`
.. _ref-varlocality-recipes:
Recipes
=======
The following subsections provide lists of variables whose context is
recipes: required, dependencies, path, and extra build information.
.. _ref-varlocality-recipe-required:
Required
--------
This section lists variables that are required for recipes.
- :term:`LICENSE`
- :term:`LIC_FILES_CHKSUM`
- :term:`SRC_URI` - used in recipes that fetch local or remote files.
.. _ref-varlocality-recipe-dependencies:
Dependencies
------------
This section lists variables that define recipe dependencies.
- :term:`DEPENDS`
- :term:`RDEPENDS`
- :term:`RRECOMMENDS`
- :term:`RCONFLICTS`
- :term:`RREPLACES`
.. _ref-varlocality-recipe-paths:
Paths
-----
This section lists variables that define recipe paths.
- :term:`WORKDIR`
- :term:`S`
- :term:`FILES`
.. _ref-varlocality-recipe-build:
Extra Build Information
-----------------------
This section lists variables that define extra build information for
recipes.
- :term:`DEFAULT_PREFERENCE`
- :term:`EXTRA_OECMAKE`
- :term:`EXTRA_OECONF`
- :term:`EXTRA_OEMAKE`
- :term:`PACKAGECONFIG_CONFARGS`
- :term:`PACKAGES`
|
