Re: cross install 64bit target from 32bit host
On 2016-05-27 14:08 -0400, Haines Brown wrote:
> On Fri, May 27, 2016 at 07:50:05PM +0200, Sven Joachim wrote:
>> On 2016-05-27 13:28 -0400, Haines Brown wrote:
>>
>> > I'm doing a cross installation. The host system is Wheezy 32 bit, and
>> > the target is Jessie 64 bit. So I run this:
>> >
>> > # debootstrap --no-check-gpg --arch=amd64 --foreign jessie /mnt/debian ...
>> >
>> > This sucessfully installed first stage files. Then I go to chroot into
>> > the target disk and get:
>> >
>> > # LANG=C.UTF-8 chroot /mnt/debian /bin/bash
>> > chroot: failed to run command `/bin/bash': Exec format error
>> >
>> > I gather the problem is that I'm trying to run 64bit bash code with a
>> > 32bit chroot application. How does one then do a cross install a 64 bit
>> > operating system with a 32-bit host machine? I did not find help in the
>> > chroot manual.
>>
>> If possible, install and boot a 64-bit kernel (you don't need the
>> --foreign option for debootstrap then). If your current processor is
>> not capable of that, try qemu-user-static.
>
> Thanks, Sven. The bottom line seems to be that it cannot be done without
> rebooting the system. I suppose my CPU (Core i7-4790K) can handle an
> installation of a 64-bit kernel in a new bootable primary partition
> created for that purpose (if that is what you meant), but that still
> involves rebooting.
Actually I meant to install a 64-bit kernel in your current (wheezy)
system, e.g. with "apt-get install linux-image-amd64", but a reboot is
indeed necessary.
Cheers,
Sven
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