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Hi Rich, |
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Thank you for the input. I had the same puzzle, too. |
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Rich Freeman <rich0@g.o> writes: |
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> On Thu, Mar 22, 2018 at 12:07 AM, Benda Xu <heroxbd@g.o> wrote: |
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>> |
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>>> builds x86 linux kernel from source code present in /usr/src/linux |
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>>> directory of Gentoo liveDVD |
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>> |
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>> This is not how Gentoo ebuild works, the build should prepare the source |
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>> code. |
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> |
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> I don't want to derail whatever your goals are here, but IMO an ebuild |
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> that actually builds a kernel would be useful. |
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> |
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> However, such an ebuild shouldn't touch /usr/src. If I were doing a |
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> kernel build ebuild I'd have it fetch kernel sources like any other |
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> package, then build it in the normal location, with configuration |
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> options provided via USE flags or some default config, and then |
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> install the final kernel in /boot. |
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+1 |
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> I realize that isn't how Gentoo has done it for the last 20 years, but |
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> I've always thought that it would make sense to have a way to actually |
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> maintain up-do-date kernels in the same manner as any other package, |
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> with the /usr/src approach being an also-supported alternative. |
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It's worth to know why we made such a choice. I took the status quo as |
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is and have never thought carefully about it. |
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> That said, there are complications. Some kernel modules want prepared |
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> (or even built) sources and this approach would clean those after |
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> install. |
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We can have a USE flag to control whether the source should be installed |
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along with the image. And those kernel module can claim their |
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dependence on the USE flag. |
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> Also, we'd probably need to use subslots for initramfs rebuilds or |
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> something like that. I suspect this is why it hasn't been done yet. |
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@Alice, any hints from the kernel team? |
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> Again, I don't want to derail SoC with this unless there was an intent |
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> to actually build a kernel this way... |
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Well, thank you! That's why I wanted to keep the technical discussions |
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related to GSOC public. It's always good to have our students to |
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communicate with and learn from experts of Gentoo. Ultimately, the |
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projects should be useful to the Gentoo community. |
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Yours, |
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Benda |
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