Martin Jansa d9a71a83d3 tcl: prevent installing another copy of tzdata
It checks build host filesystem and if it doesn't find UTC or GMT
files it installs another copy of tzdata files in:
/usr/lib/tcl8.6/tzdata

Buildhistory shows the difference:
-PKGSIZE = 2227075
+PKGSIZE = 3433088

See the autodetection in configure.in:
  #------------------------------------------------------------------------
  #       Check whether the timezone data is supplied by the OS or has
  #       to be installed by Tcl. The default is autodetection, but can
  #       be overridden on the configure command line either way.
  #------------------------------------------------------------------------

  AC_MSG_CHECKING([for timezone data])
  AC_ARG_WITH(tzdata,
      AC_HELP_STRING([--with-tzdata],
          [install timezone data (default: autodetect)]),
      [tcl_ok=$withval], [tcl_ok=auto])

  #
  # Any directories that get added here must also be added to the
  # search path in ::tcl::clock::Initialize (library/clock.tcl).
  #
  case $tcl_ok in
      no)
          AC_MSG_RESULT([supplied by OS vendor])
      ;;
      yes)
          # nothing to do here
      ;;
      auto*)
          AC_CACHE_VAL([tcl_cv_dir_zoneinfo], [
          for dir in /usr/share/zoneinfo \
                  /usr/share/lib/zoneinfo \
                  /usr/lib/zoneinfo
          do
                  if test -f $dir/UTC -o -f $dir/GMT
                  then
                          tcl_cv_dir_zoneinfo="$dir"
                          break
                  fi
          done])
          if test -n "$tcl_cv_dir_zoneinfo"; then
              tcl_ok=no
              AC_MSG_RESULT([$dir])
          else
              tcl_ok=yes
          fi
      ;;
      *)
          AC_MSG_ERROR([invalid argument: $tcl_ok])
      ;;
  esac
  if test $tcl_ok = yes
  then
      AC_MSG_RESULT([supplied by Tcl])
      INSTALL_TZDATA=install-tzdata
  fi

(From OE-Core rev: 3ace9fbfeb42ebf920812e3dd6d665b8b20a1ca0)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2023-08-21 11:34:12 +01:00
2021-07-19 18:07:21 +01:00

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

The project works using a mailing list patch submission process. Patches should be sent to the mailing list for the repository the components originate from (see below). Throughout the Yocto Project, the README files in the component in question should detail where to send patches, who the maintainers are and where bugs should be reported.

A guide to submitting patches to OpenEmbedded is available at:

https://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded

There is good documentation on how to write/format patches at:

https://www.openembedded.org/wiki/Commit_Patch_Message_Guidelines

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/):

BitBake (files in bitbake/):

Documentation (files in documentation/):

meta-yocto (files in meta-poky/, meta-yocto-bsp/):

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.

CII Best Practices

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