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OpenEmbedded "poky" with some sysmocom specific modifications. Mostly used only up to sysmocom release 201310, but the "pyro" branch is still used for 201705
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André Draszik 08fd7c4fc2 lib/oe/rootfs: reliably handle alternative symlinks 
When removing unneeded packages from a (read-only) rootfs
during rootfs creation, alternative symlinks from those
packages may or may not be removed.

The reason is as follows:

update-alternatives(-native) is used during package
installation as part of the image creation. It uses
a database which contains entries for all the
alternative symlinks possible, and the -native version
uses the target's database by means of $OPKG_OFFLINE_ROOT,
i.e. the rootfs we're in the process of creating.

Once the rootfs has been created, OE removes certain
packages because we have a read-only rootfs - in
particular ROOTFS_RO_UNNEEDED which includes
VIRTUAL-RUNTIME_update-alternatives, i.e. the
update-alternatives. Recently, a change was made in
OE, where uninstallation of update-alternatives from the
rootfs causes removal of its database, too, to save space
(700KiB (uncompressed) in a busybox system)
  b24a63d71b517af701dfedbc7f7b541d25af708f
  http://git.openembedded.org/openembedded-core/commit/meta/recipes-devtools/opkg-utils/opkg-utils_git.bb?id=b24a63d71b517af701dfedbc7f7b541d25af708f

Following from that, if update-alternatives is removed
from the target file system, update-alternatives-native
has no database anymore, meaning it can't manage any of
the alternative symlinks anymore.

Because the order of packages to uninstall is
non-deterministic, and update-alternatives could well
be removed before any packages that use the mechanism
provided, sometimes the extra symlinks are removed,
sometimes not.

By sorting the list of packages to be removed such that
update-alternatives is removed last, we can ensure that
that tings work reliably. (Certainly opkg seems to
uninstall packages in the order given on the command
line.)

[YOCTO #10916]

(From OE-Core rev: 5263dd3eac9d9fbdb7ef654d0cd532c192baed16)

Signed-off-by: André Draszik <adraszik@tycoint.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
 		2017-01-16 18:05:14 +00:00
bitbake bitbake: event: Replace slightly elderly bbmake references! 2017-01-09 13:39:13 +00:00
documentation yocto-project-qs, ref-manual: Added note for "resources temporarily unavailable" error 2017-01-11 17:23:18 +00:00
meta lib/oe/rootfs: reliably handle alternative symlinks 2017-01-16 18:05:14 +00:00
meta-poky maintainers.inc: re-assign pcmanfm, so it has same owner as libfm 2016-12-20 15:22:51 +00:00
meta-selftest recipes-test: exclude recipes from world target 2017-01-16 18:05:13 +00:00
meta-skeleton useradd-example: exclude from world 2017-01-09 13:39:11 +00:00
meta-yocto/conf meta-yocto: Rename to meta-poky to better match its purpose 2016-02-28 11:31:17 +00:00
meta-yocto-bsp u-boot/beaglebone: Select Beaglebone Black target specifically. 2016-12-17 09:57:37 +00:00
scripts scripts/oe-selftest: fix typo 2017-01-16 18:05:14 +00:00
.gitignore add !meta-poky to .gitignore file 2016-03-26 08:06:58 +00:00
.templateconf meta-yocto: Rename to meta-poky to better match its purpose 2016-02-28 11:31:17 +00:00
LICENSE Fix license notices for OE-Core 2014-01-02 12:58:54 +00:00
README meta-yocto: Rename to meta-poky to better match its purpose 2016-02-28 11:31:17 +00:00
README.hardware README.hardware: minor update to edgerouter section 2016-10-28 16:32:31 +01:00
oe-init-build-env oe-init-build-env*: Make them actually return failures 2016-03-20 23:12:30 +00:00
oe-init-build-env-memres oe-init-build-env*: Make them actually return failures 2016-03-20 23:12:30 +00:00

README 

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-poky, 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.