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Diffstat (limited to 'poky/documentation/kernel-dev/common.rst')
| -rw-r--r-- | poky/documentation/kernel-dev/common.rst | 52 |
1 files changed, 26 insertions, 26 deletions
diff --git a/poky/documentation/kernel-dev/common.rst b/poky/documentation/kernel-dev/common.rst index f64cbab56..de62df5b1 100644 --- a/poky/documentation/kernel-dev/common.rst +++ b/poky/documentation/kernel-dev/common.rst @@ -70,7 +70,7 @@ section: :term:`MACHINE` variable is set to "qemux86-64", which is fine if you are building for the QEMU emulator in 64-bit mode. However, if you are not, you need to set the - ``MACHINE`` variable appropriately in your ``conf/local.conf`` file + :term:`MACHINE` variable appropriately in your ``conf/local.conf`` file found in the :term:`Build Directory` (i.e. ``poky/build`` in this example). @@ -248,7 +248,7 @@ section: :term:`MACHINE` variable is set to "qemux86-64", which is fine if you are building for the QEMU emulator in 64-bit mode. However, if you are not, you need to set the - ``MACHINE`` variable appropriately in your ``conf/local.conf`` file + :term:`MACHINE` variable appropriately in your ``conf/local.conf`` file found in the :term:`Build Directory` (i.e. ``poky/build`` in this example). @@ -474,7 +474,7 @@ variable as follows:: The path ``${``\ :term:`THISDIR`\ ``}/${``\ :term:`PN`\ ``}`` expands to "linux-yocto" in the current directory for this example. If you add any new files that modify the kernel recipe and you have -extended ``FILESPATH`` as described above, you must place the files in +extended :term:`FILESPATH` as described above, you must place the files in your layer in the following area:: your-layer/recipes-kernel/linux/linux-yocto/ @@ -553,7 +553,7 @@ the append file. For example, suppose you had some configuration options in a file called ``network_configs.cfg``. You can place that file inside a directory -named ``linux-yocto`` and then add a ``SRC_URI`` statement such as the +named ``linux-yocto`` and then add a :term:`SRC_URI` statement such as the following to the append file. When the OpenEmbedded build system builds the kernel, the configuration options are picked up and applied. :: @@ -563,7 +563,7 @@ the kernel, the configuration options are picked up and applied. To group related configurations into multiple files, you perform a similar procedure. Here is an example that groups separate configurations specifically for Ethernet and graphics into their own -files and adds the configurations by using a ``SRC_URI`` statement like +files and adds the configurations by using a :term:`SRC_URI` statement like the following in your append file:: SRC_URI += "file://myconfig.cfg \ @@ -643,7 +643,7 @@ following lines to the linux-yocto ``.bbappend`` file in your layer:: FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:" SRC_URI += "file://defconfig" -The ``SRC_URI`` tells the build system how to search +The :term:`SRC_URI` tells the build system how to search for the file, while the :term:`FILESEXTRAPATHS` extends the :term:`FILESPATH` @@ -684,7 +684,7 @@ with the following content (without indentation):: CONFIG_SERIAL_CORE_CONSOLE=y Next, include this -configuration fragment and extend the ``FILESPATH`` variable in your +configuration fragment and extend the :term:`FILESPATH` variable in your ``.bbappend`` file:: FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:" @@ -722,7 +722,7 @@ form:: KBUILD_DEFCONFIG_KMACHINE ?= "defconfig_file" Here is an example -that assigns the ``KBUILD_DEFCONFIG`` variable based on "raspberrypi2" +that assigns the :term:`KBUILD_DEFCONFIG` variable based on "raspberrypi2" and provides the path to the "in-tree" ``defconfig`` file to be used for a Raspberry Pi 2, which is based on the Broadcom 2708/2709 chipset:: @@ -734,7 +734,7 @@ Aside from modifying your kernel recipe and providing your own a kernel's ``linux-``\ `machine`\ ``.inc`` file). In other words, if the build system detects a statement that identifies an "out-of-tree" ``defconfig`` file, that statement will override your -``KBUILD_DEFCONFIG`` variable. +:term:`KBUILD_DEFCONFIG` variable. See the :term:`KBUILD_DEFCONFIG` @@ -1349,10 +1349,10 @@ be picked up and applied when the kernel is built:: SRC_URI += "file://myconfig.cfg" As mentioned earlier, you can group related configurations into multiple -files and name them all in the ``SRC_URI`` statement as well. For +files and name them all in the :term:`SRC_URI` statement as well. For example, you could group separate configurations specifically for Ethernet and graphics into their own files and add those by using a -``SRC_URI`` statement like the following in your append file:: +:term:`SRC_URI` statement like the following in your append file:: SRC_URI += "file://myconfig.cfg \ file://eth.cfg \ @@ -1628,11 +1628,11 @@ Here are some basic steps you can use to work with your own sources: appropriate for your project: - :term:`SRC_URI`: The - ``SRC_URI`` should specify a Git repository that uses one of the + :term:`SRC_URI` should specify a Git repository that uses one of the supported Git fetcher protocols (i.e. ``file``, ``git``, ``http``, - and so forth). The ``SRC_URI`` variable should also specify either + and so forth). The :term:`SRC_URI` variable should also specify either a ``defconfig`` file or some configuration fragment files. The - skeleton recipe provides an example ``SRC_URI`` as a syntax + skeleton recipe provides an example :term:`SRC_URI` as a syntax reference. - :term:`LINUX_VERSION`: @@ -1650,16 +1650,16 @@ Here are some basic steps you can use to work with your own sources: indicate to the OpenEmbedded build system that the recipe has changed. - - :term:`PV`: The default ``PV`` + - :term:`PV`: The default :term:`PV` assignment is typically adequate. It combines the - ``LINUX_VERSION`` with the Source Control Manager (SCM) revision + :term:`LINUX_VERSION` with the Source Control Manager (SCM) revision as derived from the :term:`SRCPV` variable. The combined results are a string with the following form:: 3.19.11+git1+68a635bf8dfb64b02263c1ac80c948647cc76d5f_1+218bd8d2022b9852c60d32f0d770931e3cf343e2 - While lengthy, the extra verbosity in ``PV`` helps ensure you are + While lengthy, the extra verbosity in :term:`PV` helps ensure you are using the exact sources from which you intend to build. - :term:`COMPATIBLE_MACHINE`: @@ -1773,7 +1773,7 @@ information to build modules. If your module ``Makefile`` uses a different variable, you might want to override the :ref:`ref-tasks-compile` step, or create a patch to the ``Makefile`` to work with the more typical -``KERNEL_SRC`` or ``KERNEL_PATH`` variables. +:term:`KERNEL_SRC` or :term:`KERNEL_PATH` variables. After you have prepared your recipe, you will likely want to include the module in your images. To do this, see the documentation for the @@ -1886,23 +1886,23 @@ build stops. Kernel features are the last elements processed for configuring and patching the kernel. Therefore, adding features in this manner is a way to enforce specific features are present and enabled without needing to do a full audit of any other layer's additions to the -``SRC_URI`` statement. +:term:`SRC_URI` statement. You add a kernel feature by providing the feature as part of the -``KERNEL_FEATURES`` variable and by providing the path to the feature's +:term:`KERNEL_FEATURES` variable and by providing the path to the feature's ``.scc`` file, which is relative to the root of the kernel Metadata. The OpenEmbedded build system searches all forms of kernel Metadata on the -``SRC_URI`` statement regardless of whether the Metadata is in the +:term:`SRC_URI` statement regardless of whether the Metadata is in the "kernel-cache", system kernel Metadata, or a recipe-space Metadata (i.e. part of the kernel recipe). See the ":ref:`kernel-dev/advanced:kernel metadata location`" section for additional information. -When you specify the feature's ``.scc`` file on the ``SRC_URI`` +When you specify the feature's ``.scc`` file on the :term:`SRC_URI` statement, the OpenEmbedded build system adds the directory of that ``.scc`` file along with all its subdirectories to the kernel feature search path. Because subdirectories are searched, you can reference a -single ``.scc`` file in the ``SRC_URI`` statement to reference multiple +single ``.scc`` file in the :term:`SRC_URI` statement to reference multiple kernel features. Consider the following example that adds the "test.scc" feature to the @@ -1910,7 +1910,7 @@ build. 1. *Create the Feature File:* Create a ``.scc`` file and locate it just as you would any other patch file, ``.cfg`` file, or fetcher item you - specify in the ``SRC_URI`` statement. + specify in the :term:`SRC_URI` statement. .. note:: @@ -1937,7 +1937,7 @@ build. a similarly named configuration fragment file ``test.cfg``. 2. *Add the Feature File to SRC_URI:* Add the ``.scc`` file to the - recipe's ``SRC_URI`` statement:: + recipe's :term:`SRC_URI` statement:: SRC_URI_append = " file://test.scc" @@ -1945,7 +1945,7 @@ build. appended to the existing path. 3. *Specify the Feature as a Kernel Feature:* Use the - ``KERNEL_FEATURES`` statement to specify the feature as a kernel + :term:`KERNEL_FEATURES` statement to specify the feature as a kernel feature:: KERNEL_FEATURES_append = " test.scc" |