Re: [gentoo-user] chroot: cannot run command `bin/bash': Exec format error [SOLVED]

["Boyd Stephen Smith Jr." <bss03@volumehost.com>]

On Friday 24 February 2006 06:56, Bo Andresen <bo.andresen@gmail.com> wrote 
about 'Re: [gentoo-user] chroot: cannot run command `bin/bash': Exec 
format error [SOLVED]':
> Actually I guess I could just download the the amd64 livecd, mount it,
> copy its kernel to the harddrive (already did emerge coldplug) and boot
> on it. I did, however, find this very interesting so I do wish to
> compile a 64-bit kernel and see what it takes.

Well, when you are already running a 64-bit kernel and have a native gcc, 
you won't have to use the ARCH and CROSS_COMPILE magic.  It just works.

The whole process was also enlightening to me.  I've never cross-compiled a 
kernel, but now I know how to have my dual-Opteron box compile the kernel 
for my Linksys router or my friend's hppa box.

> > make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu-
> > (menuconfig, all, modules_install, etc.)
>
> At first when typing make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu-
> it told me it could not find these files:
>
> arch/x86_64/kernel/asm-offsets.c:12:21: asm/pda.h: No such file or
> directory arch/x86_64/kernel/asm-offsets.c:16:22: asm/ia32.h: No such
> file or directory [...]
> make[1]: *** [arch/x86_64/kernel/asm-offsets.s] Error 1
> make: *** [prepare0] Error 2
>
> # ls -ld include/asm
> lrwxrwxrwx  1 root root 10 Feb 24 14:27 include/asm -> asm-386
>
> I solved this by:
> # ln -sfn include/asm-x86_64 include/asm

I think this could also be solved with a 'make mrproper'.

> make install didn't work either

Weird.

> This all did solve the problems. The resulting kernel does indeed boot
> and it does make it possible to chroot into a 64 bit environment. :D
> Thanks a lot. This has been very educating.

Very good!  I'm glad we solved your problem.

-- 
Boyd Stephen Smith Jr.
bss03@volumehost.com
ICQ: 514984 YM/AIM: DaTwinkDaddy
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