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Quentin Schulz efd54e4d1d ref-manual: variables: provide no-match example for COMPATIBLE_MACHINE 
COMPATIBLE_MACHINE is used to forbid the use of a recipe or its packages
for a specific set of machines.

In some cases, it may make more sense to have the logic inverted and
have the recipe always forbidden except for hand-picked machines. Such
could be the case for pieces of software that only support some
architectures. In that scenario, it is sometimes a bit easier on the eye
and for maintenance to use the OVERRIDES mechanism but for that, a
default should be set.

COMPATIBLE_MACHINE:aarch64 = "^(aarch64)$"
COMPATIBLE_MACHINE:mips64 = "^(mips64)$"

wouldn't do much because if COMPATIBLE_MACHINE isn't set, the recipe is
assumed compatible and therefore, if no default is provided we enter
that case.

Hence, we need to add

COMPATIBLE_MACHINE = "^$"

as default so that it only matches the empty string, which isn't
possible for MACHINEOVERRIDES.

Cc: Quentin Schulz <foss+yocto@0leil.net>
(From yocto-docs rev: 52196d39bc85de267daffb0074eb59786751f57d)

Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2023-10-20 14:40:29 +01:00
bitbake bitbake: codeparser: replace deprecated ast.Str and 's' 2023-10-17 11:41:33 +01:00
contrib contrib/git-hooks: add a sendemail-validate example hook that adds FROM: lines to outgoing patch emails 2020-12-30 14:01:07 +00:00
documentation ref-manual: variables: provide no-match example for COMPATIBLE_MACHINE 2023-10-20 14:40:29 +01:00
meta selftest/buildoptions: tag the download mirror test with 'yocto-mirrors' 2023-10-20 13:54:23 +01:00
meta-poky poky.conf: Update to post release versioning 2023-10-19 17:10:35 +01:00
meta-selftest recipes: Drop remaining PR values from recipes 2023-09-22 07:45:17 +01:00
meta-skeleton recipes: Drop remaining PR values from recipes 2023-09-22 07:45:17 +01:00
meta-yocto-bsp beaglebone-yocto: remove redundant XSERVER assignment 2023-09-12 07:46:10 +01:00
scripts patchtest: sort when reading patches from a directory 2023-10-19 14:53:45 +01:00
.gitignore .gitignore: ignore files generated by Toaster 2023-01-12 23:09:52 +00:00
.templateconf meta-poky/conf: move default templates to conf/templates/default/ 2022-09-01 10:07:02 +01:00
LICENSE meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
LICENSE.GPL-2.0-only meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
LICENSE.MIT meta/lib+scripts: Convert to SPDX license headers 2019-05-09 16:31:55 +01:00
MAINTAINERS.md MAINTAINERS.md: no more need for a prelink-cross maintainer 2022-05-07 22:31:21 +01:00
MEMORIAM MEMORIAM: Add recognition for contributors no longer with us 2020-01-30 15:22:35 +00:00
oe-init-build-env oe-init-build-env: add quotes around variables to prevent word splitting 2022-04-05 22:23:40 +01:00
README.hardware.md README: Move to using markdown as the format 2021-06-16 16:33:18 +01:00
README.md Add README link to README.poky 2021-07-19 18:07:21 +01:00
README.OE-Core.md README: fix mail address in git example command 2023-09-04 10:27:46 +01:00
README.poky.md README: Move to using markdown as the format 2021-06-16 16:33:18 +01:00
README.qemu.md README.OE-Core/README.qemu: Move to markdown format 2021-07-20 08:51:06 +01:00
SECURITY.md SECURITY.md: add file 2023-10-19 11:31:13 +01:00

README.md

Poky

Poky is an integration of various components to form a pre-packaged build system and development environment which is used as a development and validation tool by the Yocto Project. It features support for building customised embedded style device images and custom containers. There are reference demo images ranging from X11/GTK+ to Weston, commandline and more. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK suitable for IDE integration.

Additional information on the specifics of hardware that Poky supports is available in README.hardware. Further hardware support can easily be added in the form of BSP layers which extend the systems capabilities in a modular way. Many layers are available and can be found through the layer index.

As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation, the 'meta-yocto' layer which has configuration and hardware support components. These components are all part of the Yocto Project and OpenEmbedded ecosystems.

The Yocto Project has extensive documentation about the system including a reference manual which can be found at https://docs.yoctoproject.org/

OpenEmbedded is the build architecture used by Poky and the Yocto project. For information about OpenEmbedded, see the OpenEmbedded website.

Contribution Guidelines

Please refer to our contributor guide here: https://docs.yoctoproject.org/dev/contributor-guide/ for full details on how to submit changes.

Where to Send Patches

As Poky is an integration repository (built using a tool called combo-layer), patches against the various components should be sent to their respective upstreams:

OpenEmbedded-Core (files in meta/, meta-selftest/, meta-skeleton/, scripts/):

BitBake (files in bitbake/):

Documentation (files in documentation/):

meta-yocto (files in meta-poky/, meta-yocto-bsp/):

If in doubt, check the openembedded-core git repository for the content you intend to modify as most files are from there unless clearly one of the above categories. Before sending, be sure the patches apply cleanly to the current git repository branch in question.

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