diff options
Diffstat (limited to 'documentation/kernel-dev/maint-appx.rst')
| -rw-r--r-- | documentation/kernel-dev/maint-appx.rst | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/documentation/kernel-dev/maint-appx.rst b/documentation/kernel-dev/maint-appx.rst index f84ab6e239..53b7376089 100644 --- a/documentation/kernel-dev/maint-appx.rst +++ b/documentation/kernel-dev/maint-appx.rst @@ -92,11 +92,11 @@ top-level kernel feature or BSP. The following actions effectively provide the Metadata and create the tree that includes the new feature, patch, or BSP: -1. *Pass Feature to the OpenEmbedded Build System:* A top-level kernel +#. *Pass Feature to the OpenEmbedded Build System:* A top-level kernel feature is passed to the kernel build subsystem. Normally, this feature is a BSP for a particular kernel type. -2. *Locate Feature:* The file that describes the top-level feature is +#. *Locate Feature:* The file that describes the top-level feature is located by searching these system directories: - The in-tree kernel-cache directories, which are located in the @@ -104,7 +104,7 @@ patch, or BSP: repository organized under the "Yocto Linux Kernel" heading in the :yocto_git:`Yocto Project Source Repositories <>`. - - Areas pointed to by ``SRC_URI`` statements found in kernel recipes. + - Areas pointed to by :term:`SRC_URI` statements found in kernel recipes. For a typical build, the target of the search is a feature description in an ``.scc`` file whose name follows this format (e.g. @@ -112,31 +112,31 @@ patch, or BSP: bsp_root_name-kernel_type.scc -3. *Expand Feature:* Once located, the feature description is either +#. *Expand Feature:* Once located, the feature description is either expanded into a simple script of actions, or into an existing equivalent script that is already part of the shipped kernel. -4. *Append Extra Features:* Extra features are appended to the top-level +#. *Append Extra Features:* Extra features are appended to the top-level feature description. These features can come from the :term:`KERNEL_FEATURES` variable in recipes. -5. *Locate, Expand, and Append Each Feature:* Each extra feature is +#. *Locate, Expand, and Append Each Feature:* Each extra feature is located, expanded and appended to the script as described in step three. -6. *Execute the Script:* The script is executed to produce files +#. *Execute the Script:* The script is executed to produce files ``.scc`` and ``.cfg`` files in appropriate directories of the ``yocto-kernel-cache`` repository. These files are descriptions of all the branches, tags, patches and configurations that need to be applied to the base Git repository to completely create the source (build) branch for the new BSP or feature. -7. *Clone Base Repository:* The base repository is cloned, and the +#. *Clone Base Repository:* The base repository is cloned, and the actions listed in the ``yocto-kernel-cache`` directories are applied to the tree. -8. *Perform Cleanup:* The Git repositories are left with the desired +#. *Perform Cleanup:* The Git repositories are left with the desired branches checked out and any required branching, patching and tagging has been performed. @@ -175,7 +175,7 @@ Build Strategy Once you have cloned a Yocto Linux kernel repository and the cache repository (``yocto-kernel-cache``) onto your development system, you can consider the compilation phase of kernel development, which is -building a kernel image. Some prerequisites exist that are validated by +building a kernel image. Some prerequisites are validated by the build process before compilation starts: - The :term:`SRC_URI` points to the @@ -194,7 +194,7 @@ the build process before compilation starts: In the previous example, the "yocto-4.12" branch is checked out in the ``yocto-kernel-cache`` repository. -The OpenEmbedded build system makes sure these conditions exist before +The OpenEmbedded build system makes sure these conditions are satisfied before attempting compilation. Other means, however, do exist, such as bootstrapping a BSP. @@ -229,6 +229,5 @@ This behavior means that all the generated files for a particular machine or BSP are now in the build tree directory. The files include the final ``.config`` file, all the ``.o`` files, the ``.a`` files, and so forth. Since each machine or BSP has its own separate -:term:`Build Directory` in its own separate -branch of the Git repository, you can easily switch between different -builds. +:term:`Build Directory` in its own separate branch of the Git repository, +you can easily switch between different builds. |