Can a kernel rpm be built for i686 on x86_64?

[William F. Acker WB2FLW +1 303 722 7209]

On Fri, 6 Nov 2009, Alan Cox wrote:

> On Fri, 6 Nov 2009 03:15:59 -0700 (MST)
> "William F. Acker WB2FLW +1 303 722 7209" <wacker at octothorp.org> wrote:
>
>> Hi all,
>>
>>       Years ago, I successfully built an i686 kernel using a machine running
>> the x86_64 distro.  The kernel seemed to run fine.  The only trouble I
>> found was when I tried to build an external module, the build failed.  It
>> turned out that the kernel-devel package had a binary called genksyms.
>> That was still being built as an elf64 binary.  I can no longer find that
>> binary, so I believe it's now OK to build all my packages for i686 and
>> x86_64 at once on an x86_64 machine.  Is this recommended?  If not, why
>> not?
>
> It should work fine. It does with the base kernel from kernel.org and I
> do this all the time.

>

      Unfortunately, the problem is still there.  Here is a grep for 'ELF 
64' from the output of the file command run over the installed list of 
files from kernel-devel built on an x86_64 system, running on an i686 
system.
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/basic/docproc:                                 ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/basic/fixdep:                                  ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/basic/hash:                                    ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/conmakehash:                                   ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/kallsyms:                                      ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/kconfig/conf:                                  ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/mod/mk_elfconfig:                              ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/mod/modpost:                                   ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/pnmtologo:                                     ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/selinux/mdp/mdp:                               ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped
/usr/src/kernels/2.6.30.9-96.spk.fc11.i686.PAE/scripts/unifdef:                                       ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped

      It's too bad.  That would have simplified the build pross 
considerably.

-- 
           Bill in Denver