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Demo
n00b
Joined: 25 Nov 2022
Posts: 74
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 Posted: Thu Dec 08, 2022 2:30 pm Post subject: use a list of modules to configure |
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Hello again fellows...
I have a quick question, I was wondering if someone can remind me what option/switch to give make while configuring the kernel to specify a text file with a list of modules to configure instead of going through the whole thing over and over.
I'm asking this because while still working my way through my first installation, I came across a tool that actually I think was just a script to run lsmod then store the output in text file for the make Xconfig to find, and it seems to have disappeared, I googled and googled to no results for the past few days. The GitHub page for that script had that switch but I can't find neither the option nor the tool.
I appreciate the help! |
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pietinger
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Joined: 17 Oct 2006
Posts: 4148
Location: Bavaria
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Demo
n00b
Joined: 25 Nov 2022
Posts: 74
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| Posted: Thu Dec 08, 2022 5:50 pm Post subject: |
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Thank you for the reply pietinger!
It's useful information, though not exactly what I'm seeking.
I just wonder how something I got to read about, downloaded, and compiled just disappeared into thin air!
Many thanks! |
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pietinger
Moderator
Joined: 17 Oct 2006
Posts: 4148
Location: Bavaria
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| Posted: Thu Dec 08, 2022 7:00 pm Post subject: |
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Demo,
you are welcome ! Maybe you dont need a tool if you work with "make localyesconfig"
(see more here: https://www.kernel.org/doc/html/latest/admin-guide/README.html#configuring-the-kernel )
Observe caution when using "make localmodconfig" instead ... you have to build-in all needed modules for kernel to reach its root partion static into the kernel if not working with an initramfs ! |
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psycho
Guru
Joined: 22 Jun 2007
Posts: 534
Location: New Zealand
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| Posted: Thu Dec 08, 2022 10:44 pm Post subject: |
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Hi Demo.
You probably understand this, but just in case (by "a text file with a list of modules to configure") you're asking about the .config file itself, if you make a copy of /usr/src/linux/.config (traditionally in /boot/config-whatever, but you can put it wherever you want and call it whatever you want), this simple text file stores all your configuration choices. By copying that over .config, you select/unselect all the options you selected/unselected during the manual make menuconfig process.
If things have changed (e.g. it's a new kernel source), you need toimmediately after copying across the .config file, and this will update it by potentially asking you a few (or a lot, if it's a big upgrade) additional questions (typically about new hardware drivers and sometimes new features)... but you certainly don't have to go through making decisions about everything more than once, for any particular system: as soon as you've done it once and backed up that .config, any future configuration is quick and easy. In fact even for different systems, I usually start with another system's good .config and just tweak it for the different hardware and/or use cases... it's much quicker and easier than starting from scratch.
If you don't have a fully configured .config file backed up somewhere and do need to start from scratch, then something like make localyesconfig gives you a good near-enough configuration that's likely to be bootable, at least. I don't think I've ever seen an automated configuration like that turn out 100% as I wanted it (it will potentially load a bunch of stuff that it detects your system has, but that you are never actually going to use... and of course there's a lot more to configuring a kernel than just selecting what hardware you're using, so there are a bunch of options that will be set to defaults and you may want to tweak these), but it's always much easier to tune up a near-enough .config than to work through every single option manually. |
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