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Currently, if you reference a file url, its checksum is included in the task hash, however if you change to a different file at a different location, perhaps taking advantage of the FILESPATH functionality, the system will not reparse the file in question and change its checksum to match the new file. To correctly handle this, the system not only needs to know if the existing file still exists or not, but also check the existance of every file it would have looked at when computing the original file. We already do this in the bitbake parsing code for class inclusion. This change uses the same technique to log the file list we looked at and if files in these locations exist when they previously did not, to invalidate and reparse the file. Since data stored in the cache is flattened text, we have to use a string form of the data and split on the ":" character which is ugly, but is an internal detail we can improve later if a better method is found. The cache version changes to trigger a reparse since the previous cache data is now incompatible. [YOCTO #7019] (Bitbake rev: 67ebf368aab8fbe372374190f013bdf2c83c59de) 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.