d7571c0390
There are long standing complaints about the fact its very difficult to remove a portion of a variable. The immediate request is for a -= and =- operator. The trouble is that += and =+ are "immediate" operators and are applied straight away. Most people would expect -= and =- to be deferred to have the effect most people desire and therefore implementing -= and =- would just make the situation more confusing. This deferred operation is much more similar to the override syntax which happens at data store finalisation. The _remove operator is therefore in keeping with the _append and _prepend operations. This code is loosely based on a patch from Peter Seebach although it has been rewritten to be simpler, more efficient and avoid some potential bugs. The code currently only works on space delimited variables, which are by far the most commom type. If bitbake is ehanced to support types natively in future, we can adjust this code to adapt to that. (Bitbake rev: 9c91948e10df278dad4832487fa56888cd58d187) 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 = "") 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.