bug#32167: Kernel 'build' directory in the store is a broken symbolic link

[ludo@gnu.org (Ludovic Courtès)]

Hi,

Mark H Weaver <mhw@netris.org> skribis:

> Danny Milosavljevic <dannym@scratchpost.org> writes:
>
>> On Mon, 16 Jul 2018 18:55:11 +0100 (BST)
>> <pkill9@runbox.com> wrote:
>>
>>> It would be good to keep the build directory though, since it's
>>> expected to exist, and it's easier to just download a module's
>>> source and compile it and test it.
>>
>> I agree.
>>
>> /run/booted-system/kernel/lib/modules/4.17.3-gnu is in the store
>> anyway so it will be seen by the GC.
>>
>> The fix would be in linux-libre.
>
> If we were to preserve the kernel build directory as a store item, and
> keep a link from the modules directory to the build directory, that
> would greatly increase the size of the most minimal system that users
> could build.

Yeah, we shouldn’t do that IMO.

> If the intent here is to allow support for out-of-tree kernel modules,
> then fixing these symlinks would not solve the problem, and it's not
> clear to me that fixing them would be part of a proper solution on
> GuixSD.  GuixSD is not a system where you can simply compile a kernel
> module manually and install it, because our module directory is
> immutable.  If the goal is to support building out-of-tree kernel
> modules, that's a separate discussion that deserves its own "wishlist"
> bug report, I think.

I agree.

Ludo’.