4ca7075b09
Currently the code checking whether stamps are valid only traverses one step of the dependency graph. This works fine in the normal cases where we've already validated dependencies but for the setscene code, it doesn't work well. A typical problem usecase is something like: bitbake gcc-cross -c unpack -f bitbake gcc-cross which will ignore any sstate files already cached which could be used to speed up the gcc-cross build. This becomes particularly problematic with multiple gcc builds where only one should rebuild yet they all do. This patch teaches the stamp code to be able to recurse within a given fn which gives the behaviour people would expect from the code and allows bitbake to make better use of prebuild sstate objects. (Bitbake rev: e68814cb2e8da523d4ddf05e8ceddfaa19244851) 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/community/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/