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Laurentiu Palcu
84210fd828
This commit adds a dependency mechanism to image creation, so that we can split the images creation execution in groups, that can be executed in parallel, having the dependencies satisfied in the same time. The old code didn't need this since everything was serialized. Technically, it adds a dependency graph topological sort class that the main Image class can use to sort out the dependencies. Images that have dependencies have to declare them using the NEW IMAGE_TYPEDEP variable, like in the example below: For: IMAGE_FSTYPES = "i1 i2 i3 i4 i5" IMAGE_TYPEDEP_i4 = "i2" IMAGE_TYPEDEP_i5 = "i6 i4" IMAGE_TYPEDEP_i6 = "i7" IMAGE_TYPEDEP_i7 = "i2" We'll get the following image groups, sorted out by their dependencies: [['i1', 'i3', 'i2'], ['i4', 'i7'], ['i6'], ['i5']] The algorithm can probably be optimized but, given the small size of the graphs, it'll do. [YOCTO #5830] (From OE-Core rev: db9dd4b4ef9120baccbccae77d9c31f54a6eb9a1) Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com> Signed-off-by: Saul Wold <sgw@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.