Re: [gentoo-user] [Way OT] Kernel Symlink use or not use?

[Xavier Parizet]

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Hi !

I think that the /usr/src/linux symlink is used in Gentoo by ebuilds (as
vmware-modules for example) that build kernel modules for specific
hardware which aren't yet in the kernel, and so needs to know the current
kernel config to see if it match their dependencies or requirements.

Regards.
- --
Xavier Parizet

Le Jeu 22 mars 2007 20:18, Jakob Buchgraber a écrit :
> hi @ all
>
> I considered switching to LFS a while ago as this would be the only
> Linux "distribution" fulfilling my requirements (besides Gentoo, of
> course).
> So when reading the LFS Book there was a warning saying
>
> Quote from LFS Book 6.2:
>  >> Some kernel documentation recommends creating a symlink from
> /usr/src/linux pointing to
>  >> the kernel source directory. This is specific to kernels prior to
> the 2.6 series and must not be created
>  >> on an LFS system as it can cause problems for packages you may wish
> to build once your base LFS
>  >> system is complete.
>
> The Gentoo Documentation however says:
>
> Quote from http://www.gentoo.org/doc/en/kernel-upgrade.xml
>  >> Gentoo requires that the /usr/src/linux symbolic link points to the
> sources of the kernel you are running.
>
> Quote from http://www.gentoo.org/doc/en/alsa-guide.xml
>  >> Note: The above example assumes that /usr/src/linux symlink points
> to the kernel sources you want to use. Please ensure the same before
> proceeding.
>
> But the $KERNEL_DIR/README says:
>
> Quote from $KERNEL_DIR/README
>  >> Do NOT use the /usr/src/linux area! This area has a (usually
> incomplete) set of kernel headers that are used by the library header
> files.
>  >> They should match the library, and not get messed up by whatever the
> kernel-du-jour happens to be.
>
> So after reading this I searched groups.google.com and the forums about
> this issue and found a different approach, which can be used instead of
> the /usr/src/linux symlink.
>
> It's as follows:
>     In /etc/profile
>         Set $KERNEL_DIR to /kernel/src/current (symlink)
>         Set $KBUILD_OUTPUT to /dir/to/store/output/files
>
> So what's the best way and _why_?
> Does it even matter?
>
> Cheers,
> Jay
>
> --
> Join Linuxfriendlyhardware.org project on irc.freenode.org#lfh (german)
> Registered Linux User #373457
>
> --
> gentoo-user@g.o mailing list
>
>


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