Linux#92
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jkloetzke
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May 14, 2025
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Nice.
I'm wondering if we could not just put all the functions into the linux" class with the exception of linux::menuconfig`. They just declare functions so they could be in one class without interfering with each other...
Building linux is a common task required in most projects. Right now, the kernel::linux recipe can be used for that. However, this builds a fixed version from kernel.org, which will be not correct in a lot of cases. Especially if one builds a project for a specific arm board, the upstream kernel is most of the time not usable. Vendors of those boards tend to provided there own BSP's, including a modified linux version. On top of that, sometimes it is also required to make modifications which a project specific. In those cases I don't want to copy the linux.yaml all the time and make local modifications. Instead provide a set of base class helper functions, which make the task of compiling a linux kernel (and all dependent task, like dtb handling) only a matter of adding a couple of lines to the custom linux kernel recipe. The new classes also add support by providing functions for a kmod distribution. This allows building external kernel mode drivers against the kernel in use.
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modules.yaml also has a tool dependency. So we decided to keep this structure. |
jkloetzke
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May 15, 2025
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Thanks for the update. I still found two small things, though...
Switch the default kernel::linux recipe to use the new linux classes. This also serves as an example on how they can be used.
Make it possible to override the linux kernel used in a project. Just set CONFIG_SELECT_LINUX to your linux package. This recipe needs to provide targets as seen in the virtual::kernel::linux package. For a template on how this can look like, see the documentation in classes/linux.yaml or recipes/kernel/linux.yaml. Any recipe that has a dependency on the linux kernel should depend on one of the targets defined here. This is especially true for any external linux kernel mode driver.
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Thanks! |
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