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SPDX headers have been added to each file, and match the headers used in the DocBook files. (From yocto-docs rev: 79dbb0007ae24da4a3689a23e921f2a2638757f7) Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
167 lines
2.6 KiB
ReStructuredText
167 lines
2.6 KiB
ReStructuredText
.. SPDX-License-Identifier: CC-BY-2.0-UK
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****************
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Variable Context
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****************
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While you can use most variables in almost any context such as
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``.conf``, ``.bbclass``, ``.inc``, and ``.bb`` files, some variables are
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often associated with a particular locality or context. This chapter
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describes some common associations.
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.. _ref-varlocality-configuration:
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Configuration
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=============
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The following subsections provide lists of variables whose context is
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configuration: distribution, machine, and local.
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.. _ref-varlocality-config-distro:
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Distribution (Distro)
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---------------------
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This section lists variables whose configuration context is the
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distribution, or distro.
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- ``DISTRO``
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- ``DISTRO_NAME``
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- ``DISTRO_VERSION``
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- ``MAINTAINER``
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- ``PACKAGE_CLASSES``
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- ``TARGET_OS``
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- ``TARGET_FPU``
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- ``TCMODE``
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- ``TCLIBC``
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.. _ref-varlocality-config-machine:
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Machine
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-------
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This section lists variables whose configuration context is the machine.
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- ``TARGET_ARCH``
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- ``SERIAL_CONSOLES``
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- ``PACKAGE_EXTRA_ARCHS``
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- ``IMAGE_FSTYPES``
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- ``MACHINE_FEATURES``
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- ``MACHINE_EXTRA_RDEPENDS``
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- ``MACHINE_EXTRA_RRECOMMENDS``
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- ``MACHINE_ESSENTIAL_EXTRA_RDEPENDS``
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- ``MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS``
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.. _ref-varlocality-config-local:
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Local
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-----
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This section lists variables whose configuration context is the local
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configuration through the ``local.conf`` file.
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- ``DISTRO``
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- ``MACHINE``
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- ``DL_DIR``
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- ``BBFILES``
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- ``EXTRA_IMAGE_FEATURES``
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- ``PACKAGE_CLASSES``
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- ``BB_NUMBER_THREADS``
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- ``BBINCLUDELOGS``
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- ``ENABLE_BINARY_LOCALE_GENERATION``
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.. _ref-varlocality-recipes:
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Recipes
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=======
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The following subsections provide lists of variables whose context is
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recipes: required, dependencies, path, and extra build information.
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.. _ref-varlocality-recipe-required:
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Required
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--------
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This section lists variables that are required for recipes.
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- ``LICENSE``
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- ``LIC_FILES_CHKSUM``
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- ``SRC_URI`` - used in recipes that fetch local or remote files.
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.. _ref-varlocality-recipe-dependencies:
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Dependencies
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------------
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This section lists variables that define recipe dependencies.
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- ``DEPENDS``
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- ``RDEPENDS``
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- ``RRECOMMENDS``
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- ``RCONFLICTS``
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- ``RREPLACES``
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.. _ref-varlocality-recipe-paths:
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Paths
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-----
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This section lists variables that define recipe paths.
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- ``WORKDIR``
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- ``S``
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- ``FILES``
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.. _ref-varlocality-recipe-build:
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Extra Build Information
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-----------------------
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This section lists variables that define extra build information for
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recipes.
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- ``DEFAULT_PREFERENCE``
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- ``EXTRA_OECMAKE``
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- ``EXTRA_OECONF``
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- ``EXTRA_OEMAKE``
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- ``PACKAGECONFIG_CONFARGS``
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- ``PACKAGES``
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