| Moving to the Yocto Project 2.5 Release |
| ======================================= |
| |
| This section provides migration information for moving to the Yocto |
| Project 2.5 Release from the prior release. |
| |
| .. _migration-2.5-packaging-changes: |
| |
| Packaging Changes |
| ----------------- |
| |
| This section provides information about packaging changes that have |
| occurred: |
| |
| - ``bind-libs``: The libraries packaged by the bind recipe are in a |
| separate ``bind-libs`` package. |
| |
| - ``libfm-gtk``: The ``libfm`` GTK+ bindings are split into a |
| separate ``libfm-gtk`` package. |
| |
| - ``flex-libfl``: The flex recipe splits out libfl into a separate |
| ``flex-libfl`` package to avoid too many dependencies being pulled in |
| where only the library is needed. |
| |
| - ``grub-efi``: The ``grub-efi`` configuration is split into a |
| separate ``grub-bootconf`` recipe. However, the dependency |
| relationship from ``grub-efi`` is through a virtual/grub-bootconf |
| provider making it possible to have your own recipe provide the |
| dependency. Alternatively, you can use a BitBake append file to bring |
| the configuration back into the ``grub-efi`` recipe. |
| |
| - *armv7a Legacy Package Feed Support:* Legacy support is removed for |
| transitioning from ``armv7a`` to ``armv7a-vfp-neon`` in package |
| feeds, which was previously enabled by setting |
| ``PKGARCHCOMPAT_ARMV7A``. This transition occurred in 2011 and active |
| package feeds should by now be updated to the new naming. |
| |
| .. _migration-2.5-removed-recipes: |
| |
| Removed Recipes |
| --------------- |
| |
| The following recipes have been removed: |
| |
| - ``gcc``: The version 6.4 recipes are replaced by 7.x. |
| |
| - ``gst-player``: Renamed to ``gst-examples`` as per upstream. |
| |
| - ``hostap-utils``: This software package is obsolete. |
| |
| - ``latencytop``: This recipe is no longer maintained upstream. The |
| last release was in 2009. |
| |
| - ``libpfm4``: The only file that requires this recipe is |
| ``oprofile``, which has been removed. |
| |
| - ``linux-yocto``: The version 4.4, 4.9, and 4.10 recipes have been |
| removed. Versions 4.12, 4.14, and 4.15 remain. |
| |
| - ``man``: This recipe has been replaced by modern ``man-db`` |
| |
| - ``mkelfimage``: This tool has been removed in the upstream coreboot |
| project, and is no longer needed with the removal of the ELF image |
| type. |
| |
| - ``nativesdk-postinst-intercept``: This recipe is not maintained. |
| |
| - ``neon``: This software package is no longer maintained upstream |
| and is no longer needed by anything in OpenEmbedded-Core. |
| |
| - ``oprofile``: The functionality of this recipe is replaced by |
| ``perf`` and keeping compatibility on an ongoing basis with ``musl`` |
| is difficult. |
| |
| - ``pax``: This software package is obsolete. |
| |
| - ``stat``: This software package is not maintained upstream. |
| ``coreutils`` provides a modern stat binary. |
| |
| - ``zisofs-tools-native``: This recipe is no longer needed because |
| the compressed ISO image feature has been removed. |
| |
| .. _migration-2.5-scripts-and-tools-changes: |
| |
| Scripts and Tools Changes |
| ------------------------- |
| |
| The following are changes to scripts and tools: |
| |
| - ``yocto-bsp``, ``yocto-kernel``, and ``yocto-layer``: The |
| ``yocto-bsp``, ``yocto-kernel``, and ``yocto-layer`` scripts |
| previously shipped with poky but not in OpenEmbedded-Core have been |
| removed. These scripts are not maintained and are outdated. In many |
| cases, they are also limited in scope. The |
| ``bitbake-layers create-layer`` command is a direct replacement for |
| ``yocto-layer``. See the documentation to create a BSP or kernel |
| recipe in the ":ref:`bsp-guide/bsp:bsp kernel recipe example`" section. |
| |
| - ``devtool finish``: ``devtool finish`` now exits with an error if |
| there are uncommitted changes or a rebase/am in progress in the |
| recipe's source repository. If this error occurs, there might be |
| uncommitted changes that will not be included in updates to the |
| patches applied by the recipe. A -f/--force option is provided for |
| situations that the uncommitted changes are inconsequential and you |
| want to proceed regardless. |
| |
| - ``scripts/oe-setup-rpmrepo`` script: The functionality of |
| ``scripts/oe-setup-rpmrepo`` is replaced by |
| ``bitbake package-index``. |
| |
| - ``scripts/test-dependencies.sh`` script: The script is largely made |
| obsolete by the recipe-specific sysroots functionality introduced in |
| the previous release. |
| |
| .. _migration-2.5-bitbake-changes: |
| |
| BitBake Changes |
| --------------- |
| |
| The following are BitBake changes: |
| |
| - The ``--runall`` option has changed. There are two different |
| behaviors people might want: |
| |
| - *Behavior A:* For a given target (or set of targets) look through |
| the task graph and run task X only if it is present and will be |
| built. |
| |
| - *Behavior B:* For a given target (or set of targets) look through |
| the task graph and run task X if any recipe in the taskgraph has |
| such a target, even if it is not in the original task graph. |
| |
| The ``--runall`` option now performs "Behavior B". Previously |
| ``--runall`` behaved like "Behavior A". A ``--runonly`` option has |
| been added to retain the ability to perform "Behavior A". |
| |
| - Several explicit "run this task for all recipes in the dependency |
| tree" tasks have been removed (e.g. ``fetchall``, ``checkuriall``, |
| and the ``*all`` tasks provided by the ``distrodata`` and |
| ``archiver`` classes). There is a BitBake option to complete this for |
| any arbitrary task. For example: |
| :: |
| |
| bitbake <target> -c fetchall |
| |
| should now be replaced with: |
| :: |
| |
| bitbake <target> --runall=fetch |
| |
| .. _migration-2.5-python-and-python3-changes: |
| |
| Python and Python 3 Changes |
| --------------------------- |
| |
| The following are auto-packaging changes to Python and Python 3: |
| |
| The script-managed ``python-*-manifest.inc`` files that were previously |
| used to generate Python and Python 3 packages have been replaced with a |
| JSON-based file that is easier to read and maintain. A new task is |
| available for maintainers of the Python recipes to update the JSON file |
| when upgrading to new Python versions. You can now edit the file |
| directly instead of having to edit a script and run it to update the |
| file. |
| |
| One particular change to note is that the Python recipes no longer have |
| build-time provides for their packages. This assumes ``python-foo`` is |
| one of the packages provided by the Python recipe. You can no longer run |
| ``bitbake python-foo`` or have a |
| :term:`DEPENDS` on ``python-foo``, |
| but doing either of the following causes the package to work as |
| expected: :: |
| |
| IMAGE_INSTALL_append = " python-foo" |
| |
| or :: |
| |
| RDEPENDS_${PN} = "python-foo" |
| |
| The earlier build-time provides behavior was a quirk of the |
| way the Python manifest file was created. For more information on this |
| change please see :yocto_git:`this commit |
| </poky/commit/?id=8d94b9db221d1def42f091b991903faa2d1651ce>`. |
| |
| .. _migration-2.5-miscellaneous-changes: |
| |
| Miscellaneous Changes |
| --------------------- |
| |
| The following are additional changes: |
| |
| - The ``kernel`` class supports building packages for multiple kernels. |
| If your kernel recipe or ``.bbappend`` file mentions packaging at |
| all, you should replace references to the kernel in package names |
| with ``${KERNEL_PACKAGE_NAME}``. For example, if you disable |
| automatic installation of the kernel image using |
| ``RDEPENDS_kernel-base = ""`` you can avoid warnings using |
| ``RDEPENDS_${KERNEL_PACKAGE_NAME}-base = ""`` instead. |
| |
| - The ``buildhistory`` class commits changes to the repository by |
| default so you no longer need to set ``BUILDHISTORY_COMMIT = "1"``. |
| If you want to disable commits you need to set |
| ``BUILDHISTORY_COMMIT = "0"`` in your configuration. |
| |
| - The ``beaglebone`` reference machine has been renamed to |
| ``beaglebone-yocto``. The ``beaglebone-yocto`` BSP is a reference |
| implementation using only mainline components available in |
| OpenEmbedded-Core and ``meta-yocto-bsp``, whereas Texas Instruments |
| maintains a full-featured BSP in the ``meta-ti`` layer. This rename |
| avoids the previous name clash that existed between the two BSPs. |
| |
| - The ``update-alternatives`` class no longer works with SysV ``init`` |
| scripts because this usage has been problematic. Also, the |
| ``sysklogd`` recipe no longer uses ``update-alternatives`` because it |
| is incompatible with other implementations. |
| |
| - By default, the :ref:`cmake <ref-classes-cmake>` class uses |
| ``ninja`` instead of ``make`` for building. This improves build |
| performance. If a recipe is broken with ``ninja``, then the recipe |
| can set ``OECMAKE_GENERATOR = "Unix Makefiles"`` to change back to |
| ``make``. |
| |
| - The previously deprecated ``base_*`` functions have been removed in |
| favor of their replacements in ``meta/lib/oe`` and |
| ``bitbake/lib/bb``. These are typically used from recipes and |
| classes. Any references to the old functions must be updated. The |
| following table shows the removed functions and their replacements: |
| |
| +------------------------------+----------------------------------------------------------+ |
| | *Removed* | *Replacement* | |
| +==============================+==========================================================+ |
| | base_path_join() | oe.path.join() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_path_relative() | oe.path.relative() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_path_out() | oe.path.format_display() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_read_file() | oe.utils.read_file() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_ifelse() | oe.utils.ifelse() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_conditional() | oe.utils.conditional() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_less_or_equal() | oe.utils.less_or_equal() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_version_less_or_equal() | oe.utils.version_less_or_equal() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_contains() | bb.utils.contains() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_both_contain() | oe.utils.both_contain() | |
| +------------------------------+----------------------------------------------------------+ |
| | base_prune_suffix() | oe.utils.prune_suffix() | |
| +------------------------------+----------------------------------------------------------+ |
| | oe_filter() | oe.utils.str_filter() | |
| +------------------------------+----------------------------------------------------------+ |
| | oe_filter_out() | oe.utils.str_filter_out() (or use the \_remove operator) | |
| +------------------------------+----------------------------------------------------------+ |
| |
| - Using ``exit 1`` to explicitly defer a postinstall script until first |
| boot is now deprecated since it is not an obvious mechanism and can |
| mask actual errors. If you want to explicitly defer a postinstall to |
| first boot on the target rather than at ``rootfs`` creation time, use |
| ``pkg_postinst_ontarget()`` or call |
| ``postinst_intercept delay_to_first_boot`` from ``pkg_postinst()``. |
| Any failure of a ``pkg_postinst()`` script (including ``exit 1``) |
| will trigger a warning during ``do_rootfs``. |
| |
| For more information, see the |
| ":ref:`dev-manual/common-tasks:post-installation scripts`" |
| section in the Yocto Project Development Tasks Manual. |
| |
| - The ``elf`` image type has been removed. This image type was removed |
| because the ``mkelfimage`` tool that was required to create it is no |
| longer provided by coreboot upstream and required updating every time |
| ``binutils`` updated. |
| |
| - Support for .iso image compression (previously enabled through |
| ``COMPRESSISO = "1"``) has been removed. The userspace tools |
| (``zisofs-tools``) are unmaintained and ``squashfs`` provides better |
| performance and compression. In order to build a live image with |
| squashfs+lz4 compression enabled you should now set |
| ``LIVE_ROOTFS_TYPE = "squashfs-lz4"`` and ensure that ``live`` is in |
| ``IMAGE_FSTYPES``. |
| |
| - Recipes with an unconditional dependency on ``libpam`` are only |
| buildable with ``pam`` in ``DISTRO_FEATURES``. If the dependency is |
| truly optional then it is recommended that the dependency be |
| conditional upon ``pam`` being in ``DISTRO_FEATURES``. |
| |
| - For EFI-based machines, the bootloader (``grub-efi`` by default) is |
| installed into the image at /boot. Wic can be used to split the |
| bootloader into separate boot and rootfs partitions if necessary. |
| |
| - Patches whose context does not match exactly (i.e. where patch |
| reports "fuzz" when applying) will generate a warning. For an example |
| of this see :yocto_git:`this commit |
| </poky/commit/?id=cc97bc08125b63821ce3f616771830f77c456f57>`. |
| |
| - Layers are expected to set ``LAYERSERIES_COMPAT_layername`` to match |
| the version(s) of OpenEmbedded-Core they are compatible with. This is |
| specified as codenames using spaces to separate multiple values (e.g. |
| "rocko sumo"). If a layer does not set |
| ``LAYERSERIES_COMPAT_layername``, a warning will is shown. If a layer |
| sets a value that does not include the current version ("sumo" for |
| the 2.5 release), then an error will be produced. |
| |
| - The ``TZ`` environment variable is set to "UTC" within the build |
| environment in order to fix reproducibility problems in some recipes. |
| |
| |