72500107b2
As Chris Larson points out in the bug, "BUILD_ARCH changing doesn't change
native/cross sstate checksums, because its calculated in ${@}, so just its
unexpanded form is in the signature. But BUILD_ARCH ends up included in the
sstate filenames, so changes to BUILD_ARCH will result in rebuilds of
native/cross but not rebuilds of the target recipes which depend on
them, which is just what we want."
However it does mean we can't easily test 32 and 64 bit signatures. In order
to make the tests work, we need to add BUILD_ARCH to the HASHBASE whitelist.
BUILD_ARCH is used in the workdir paths and so on so changing it does still
rebuild when we need it to.
With improvements to function dependency tracking, a dependency on SSTATE_PKGARCH
was also introduced causing problems for 32/64 bit build signature equivalence.
Since this is reflected in the sstate filenames, we can safely whitelist this too.
[YOCTO #5970]
(From OE-Core rev: 4f6636be97e654c7f3d58e2649328b1dde8ef696)
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.