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https://git.yoctoproject.org/poky
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Richard Purdie
536b73f55f
Our current OVERRIDES handling means we end up caching and checking for a lot of possible override combinations which turn out to very unlikely. A typical example is the SRC_URI variable where we have to check if "URI" is an override. Having spent many hours working in this code, I've realised all the actual overrides we use are lower case and our standard variables are mostly uppercase. This means we could gain quite some speed advantage if we write this into the code, that overrides only consist of lowercase characters. This patch shows how simple this is and the resulting speed gains are significant. This is a significant change but tests show we don't appear to have any users of capitals in overrides in any OE-Core metadata. Before "time bitbake -p": real 2m4.224s user 7m32.312s sys 0m7.116s After "time bitbake -p": real 1m26.009s user 5m10.484s sys 0m4.640s This check could also be made conditional however I'm not seeing a need to do that at present. (Bitbake rev: c9b9443faa76ee7366b1400a56f826f3f9dec1be) 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 (built using a tool called combo-layer),
patches against the various components should be sent to their respective
upstreams:
bitbake:
Git repository: http://git.openembedded.org/bitbake/
Mailing list: bitbake-devel@lists.openembedded.org
documentation:
Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/
Mailing list: yocto@yoctoproject.org
meta-yocto(-bsp):
Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto(-bsp)
Mailing list: poky@yoctoproject.org
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.
Git repository: http://git.openembedded.org/openembedded-core/
Mailing list: 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.