linux-kernel - Re: kbuild: disable depmod in cross-compile kernel build

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Date:	Sun, 21 Oct 2007 19:53:43 +0200 (CEST)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	Christian Bjølevik <nafallo@...icalforest.se>,
	Deepak Saxena <dsaxena@...sta.com>,
	Armin Kuster <akuster@...sta.com>,
	Adrian Bunk <bunk@...nel.org>
Subject: Re: kbuild: disable depmod in cross-compile kernel build

On Fri, 19 Oct 2007, Linux Kernel Mailing List wrote:
> Gitweb:     http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=50a8ec31c3a00594ceb7c5f1dcf2ecdaf6a5b847
> Commit:     50a8ec31c3a00594ceb7c5f1dcf2ecdaf6a5b847
> Parent:     6f67a00498abf8f0b29c2cecfce188c70be309d0
> Author:     Sam Ravnborg <sam@...tun.(none)>
> AuthorDate: Thu Oct 18 21:24:21 2007 +0200
> Committer:  Sam Ravnborg <sam@...tun.(none)>
> CommitDate: Thu Oct 18 23:17:06 2007 +0200
> 
>     kbuild: disable depmod in cross-compile kernel build
>     
>     When building embedded systems in a cross-compile environment and
>     populating a target's file system image, we don't want to run the
>     depmod on the host as we may be building for a completely different
>     architecture. Since there's no such thing as a cross-depmod, we
>     just disable running depmod in the cross-compile case and we just
>     run depmod on the target at bootup.
>     
>     Inspired by patches from Christian, Armin and Deepak.
>     
>     This solves: http://bugzilla.kernel.org/show_bug.cgi?id=3881
>     
>     Signed-off-by: Sam Ravnborg <sam@...nborg.org>
>     Cc: Christian Bjølevik <nafallo@...icalforest.se>
>     Cc: Deepak Saxena <dsaxena@...sta.com> and
>     Cc: Armin Kuster <akuster@...sta.com>,

Euh, is these really necessary?

At work I have no problems running depmod on an i386 system for ppc64 modules
after I installed module-init-tools 3.3-pre2 (from Debian).
I did have problems (depmod SEGV) using the depmod that came with CentOS
4 (from module-init-tools 3.1-pre5).

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds