Building a 32 bit on a 64 bit machine.

Building a 32 bit on a 64 bit machine.

[Kevin Wilson]

Hello,
I want to build a module I developed for 32 bit on a 64 bit machine.
It is on a machine running Fedora.

I tried to install the kernel-devel of the 32 bit, and to build my module
agains that tree, with Make ARCH=i686. But I get error saying:
`-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.

error: CPU you selected does not support x86-64 instruction set

Any ideas? is it possible ?

I had success with building this module against other 64 bit kernels
using this method
(installing kernel-devel and building against it).

I appreciate if anybody can some link for some howto.

Rgs,
Kevin

Re: Building a 32 bit on a 64 bit machine.

[Karen Shaeffer]

On Fri, Jun 05, 2009 at 04:31:50PM +0300, Kevin Wilson wrote:
> Hello,
> I want to build a module I developed for 32 bit on a 64 bit machine.
> It is on a machine running Fedora.
> 
> Rgs,
> Kevin

Hi Kevin,
You need a cross compile tool chain. You can learn about that
here:
http://cross-lfs.org/view/1.1.0/x86_64/introduction/chapter.html

You'll also need to port your module to 64 bits.

Good luck with it,
Karen
-- 
 Karen Shaeffer
 Neuralscape, Palo Alto, Ca. 94306
 shaeffer@neuralscape.com  http://www.neuralscape.com

Re: Building a 32 bit on a 64 bit machine.

[Kevin Wilson]

Hello,
   I know that using cross compiler is needed when you want to compile
for different platforms (for example, to build a module for ARM or PPC on intel
machine).
I did not mention it, but the machine I am building on is an Intel
x86_64 machine, and I want to build on it a 32 bit module - also for
Intel machine.
So I believe there should be a way to do it with some gcc flag.

Any ideas ?

Rgs,
Kevin

On Sat, Jun 6, 2009 at 8:18 AM, Karen Shaeffer<shaeffer@neuralscape.com> wrote:
> On Fri, Jun 05, 2009 at 04:31:50PM +0300, Kevin Wilson wrote:
>> Hello,
>> I want to build a module I developed for 32 bit on a 64 bit machine.
>> It is on a machine running Fedora.
>>
>> Rgs,
>> Kevin
>
> Hi Kevin,
> You need a cross compile tool chain. You can learn about that
> here:
> http://cross-lfs.org/view/1.1.0/x86_64/introduction/chapter.html
>
> You'll also need to port your module to 64 bits.
>
> Good luck with it,
> Karen
> --
>  Karen Shaeffer
>  Neuralscape, Palo Alto, Ca. 94306
>  shaeffer@neuralscape.com  http://www.neuralscape.com
>

Re: Building a 32 bit on a 64 bit machine.

[Sam Ravnborg]

On Sat, Jun 06, 2009 at 08:40:39AM +0300, Kevin Wilson wrote:
> Hello,
>    I know that using cross compiler is needed when you want to compile
> for different platforms (for example, to build a module for ARM or PPC on intel
> machine).
> I did not mention it, but the machine I am building on is an Intel
> x86_64 machine, and I want to build on it a 32 bit module - also for
> Intel machine.
> So I believe there should be a way to do it with some gcc flag.
> 
> Any ideas ?

Your gcc only support 64-bit.
So you need a cross compiler to build 32 bit x86.

	Sam