f31b671502
When copying files as part of the unpack we currently use cp -p, which is a shortcut for --preserve=mode,ownership,timestamps. We do want to preserve timestamps, because some fetchers set these explicitly. We don't care about ownership. If the files are owned by us then they ill remain owned by us, and if they're not then the attempt to change ownership will be silently ignored. In a shared DL_DIR where files have group ownership this group access isn't relevant in the single-user build tree. We do want to preserve executable bits in the mode, but cp always does this. The difference between --preserve=mode and no --preserve is that the mode isn't preserved exactly (no sticky bits, no suid, umask is applied) but this also isn't a relevant difference in a build tree. Also expand the arguments to be clearer about what options are being passed. The impetus for this is that coreutils 9.4 includes a change in gnulib[1] and will now try to preserve permission-based xattrs if asked to preserve the mode. This can result in cp failing when copying a file from a NFSv4 server with ACLs stored in xattrs to a non-NFS directory where those xattrs cannot be written: cp: preserving permissions for ‘./jquery-3.7.1.js’: Operation not supported The error comes from the kernel refusing to write a system.nfs4_acl xattr to a file on ext4. This situation doesn't appear on all systems with coreutils 9.4, at the time of writing it fails on Ubuntu 24.04 onwards but not Fedora 40. This is because /etc/xattr.conf is used to determine which xattrs describe permissions, and Fedora 40 has removed the NFSv4 attributes[2]. Also, use long-form options to make the cp command clearer. [1] https://github.com/coreutils/gnulib/commit/eb6a8a4dfb [2] https://src.fedoraproject.org/rpms/attr/blob/rawhide/f/0003-attr-2.4.48-xattr-conf-nfs4-acls.patch [ YOCTO #15596 ] (cherry picked from commit 2f35dac0c821ab231459922ed98e1b2cc599ca9a) (Bitbake rev: 9580f15aae08ae6e3693ebb898b6fd5238f5a7f8) Signed-off-by: Ross Burton <ross.burton@arm.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Alexander Feilke <Alexander.Feilke@ew.tq-group.com> Signed-off-by: Yoann Congal <yoann.congal@smile.fr> Signed-off-by: Paul Barker <paul@pbarker.dev>
Poky
Poky is an integration of various components to form a pre-packaged build system and development environment which is used as a development and validation tool by the Yocto Project. It features support for building customised embedded style device images and custom containers. There are reference demo images ranging from X11/GTK+ to Weston, commandline and more. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK suitable for 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 BSP layers which extend the systems capabilities in a modular way. Many layers are available and can be found through the layer index.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation, the 'meta-yocto' layer which has configuration and hardware support components. These components are all part of the Yocto Project and OpenEmbedded ecosystems.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at https://docs.yoctoproject.org/
OpenEmbedded is the build architecture used by Poky and the Yocto project. For information about OpenEmbedded, see the OpenEmbedded website.
Contribution Guidelines
Please refer to our contributor guide here: https://docs.yoctoproject.org/dev/contributor-guide/ for full details on how to submit changes.
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:
OpenEmbedded-Core (files in meta/, meta-selftest/, meta-skeleton/, scripts/):
- Git repository: https://git.openembedded.org/openembedded-core/
- Mailing list: openembedded-core@lists.openembedded.org
BitBake (files in bitbake/):
- Git repository: https://git.openembedded.org/bitbake/
- Mailing list: bitbake-devel@lists.openembedded.org
Documentation (files in documentation/):
- Git repository: https://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/
- Mailing list: docs@lists.yoctoproject.org
meta-yocto (files in meta-poky/, meta-yocto-bsp/):
- Git repository: https://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto
- Mailing list: poky@lists.yoctoproject.org
If in doubt, check the openembedded-core git repository for the content you intend to modify as most files are from there unless clearly one of the above categories. Before sending, be sure the patches apply cleanly to the current git repository branch in question.