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Alexander Kanavin
941ac7d256
When reviewing proposed fragments to add settings for DISTRO and MACHINE, RP noted that such fragments only add clutter and overhead, and there's no need to maintain them as separate files. Rather when bitbake sees 'fragmentvar/fragmentvalue' it can expand that into FRAGMENTVAR = "fragmentvalue". To achieve that, 'addfragments' directive is extended with a parameter that sets the name of the variable that holds definitions of such built-in fragments, for example like this: "machine:MACHINE distro:DISTRO" Then each enabled fragment name is matched against these definitions and the respective variable is set, e.g. 'machine/qemuarm' would match 'machine:MACHINE' and result in MACHINE set to 'qemuarm'. This happens before any fragment files are looked up on disk, and no such lookup happens if there was a match, which should prevent possible misuse of the feature. So the builtin fragment definition is also an allowlist for them. Please also see the patches for oe-core that show an application of the feature. (Bitbake rev: 3b9d7bea915dc7f10e845854f1dae325743f9456) Signed-off-by: Alexander Kanavin <alex@linutronix.de> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Documentation ============= This is the directory that contains the BitBake documentation. Manual Organization =================== Folders exist for individual manuals as follows: * bitbake-user-manual --- The BitBake User Manual Each folder is self-contained regarding content and figures. If you want to find HTML versions of the BitBake manuals on the web, go to https://www.openembedded.org/wiki/Documentation. Sphinx ====== The BitBake documentation was migrated from the original DocBook format to Sphinx based documentation for the Yocto Project 3.2 release. Additional information related to the Sphinx migration, and guidelines for developers willing to contribute to the BitBake documentation can be found in the Yocto Project Documentation README file: https://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/tree/documentation/README How to build the Yocto Project documentation ============================================ Sphinx is written in Python. While it might work with Python2, for obvious reasons, we will only support building the BitBake documentation with Python3. Sphinx might be available in your Linux distro packages repositories, however it is not recommend using distro packages, as they might be old versions, especially if you are using an LTS version of your distro. The recommended method to install Sphinx and all required dependencies is to use the Python Package Index (pip). To install all required packages run: $ pip3 install sphinx sphinx_rtd_theme pyyaml To build the documentation locally, run: $ cd doc $ make html The resulting HTML index page will be _build/html/index.html, and you can browse your own copy of the locally generated documentation with your browser.