c4da9b949a
We've had versioned dependency support in LAYERDEPENDS for quite a long time, but I can say with pretty good certainty that almost nobody has used it up to now because it was too strict - the specified version had to exactly match the version in your configuration or you would get an error; there was no "greater than or equal" option, which is usually what you will want given that LAYERVERSION does get bumped from time to time. However, users mismatching layer branches and then having their builds fail later on with some incomprehensible error is still a pretty common problem. We can't simply use the git branch because not everyone is always on a branch and the branch names don't always match up (and that's not an issue). To provide a practical means to address branch mismatching, I have reworked LAYERDEPENDS version specifications to use the more familiar "dependency (>= version)" syntax as used with package dependencies, support non-integer versions, and clarified the error message a little. If we then take care to bump the version on every breaking change, it is at least possible to have layers depend on these changes when they update to match; we can now even support a major.minor scheme to allow retrospectively adding a version limiter to old branches when a new branch is created and yet still allow the old branch minor version to be bumped if needed. Fixes [YOCTO #5991]. (Bitbake rev: 408be9cdf2b1e32e64ea488d8051a546fb54c144) Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky is an integration of various components to form a complete prepackaged build system and development environment. It features support for building customised embedded device style images. There are reference demo images featuring a X11/Matchbox/GTK themed UI called Sato. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with 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 layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at: http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions of OpenEmbedded. It is distro-less (can build a functional image with DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website: http://www.openembedded.org/
Where to Send Patches
As Poky is an integration repository, patches against the various components should be sent to their respective upstreams.
bitbake: bitbake-devel@lists.openembedded.org
meta-yocto: poky@yoctoproject.org
Most everything else should be sent to the OpenEmbedded Core mailing list. If in doubt, check the oe-core git repository for the content you intend to modify. Before sending, be sure the patches apply cleanly to the current oe-core git repository. openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of oe-core and poky-specific files.