* x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 7:58 ` Rajat Jain
0 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-09 7:58 UTC (permalink / raw)
To: kernelnewbies
Hi,
Can someone tell me if the i386 one is to be used when we want to build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
Thanks,
Rajat
^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 7:58 ` Rajat Jain
0 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-09 7:58 UTC (permalink / raw)
To: linux-newbie, kernelnewbies
Hi,
Can someone tell me if the i386 one is to be used when we want to build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
Thanks,
Rajat
^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 7:58 ` Rajat Jain
@ 2014-09-09 13:21 ` Valdis.Kletnieks
-1 siblings, 0 replies; 23+ messages in thread
From: Valdis.Kletnieks at vt.edu @ 2014-09-09 13:21 UTC (permalink / raw)
To: kernelnewbies
On Tue, 09 Sep 2014 07:58:49 -0000, Rajat Jain said:
> Can someone tell me if the i386 one is to be used when we want to build for a
> 32bit machine and the x86_64 is to be used for 64 bit machine?
I wouldn't run either one on an actual machine. Defconfigs are *example*
configs, only useful as a template for customizing for actual hardware.
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^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 13:21 ` Valdis.Kletnieks
0 siblings, 0 replies; 23+ messages in thread
From: Valdis.Kletnieks @ 2014-09-09 13:21 UTC (permalink / raw)
To: Rajat Jain; +Cc: linux-newbie, kernelnewbies
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On Tue, 09 Sep 2014 07:58:49 -0000, Rajat Jain said:
> Can someone tell me if the i386 one is to be used when we want to build for a
> 32bit machine and the x86_64 is to be used for 64 bit machine?
I wouldn't run either one on an actual machine. Defconfigs are *example*
configs, only useful as a template for customizing for actual hardware.
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_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
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^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 7:58 ` Rajat Jain
@ 2014-09-09 14:06 ` Matthias Brugger
-1 siblings, 0 replies; 23+ messages in thread
From: Matthias Brugger @ 2014-09-09 14:06 UTC (permalink / raw)
To: kernelnewbies
On 09/09/14 09:58, Rajat Jain wrote:
> Hi,
>
> Can someone tell me if the i386 one is to be used when we want to build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
You can build the kernel with any architecture for any architecture.
This is called cross-compiling. The homepage [0] should explain you how
to do that.
Cheers,
Matthias
[0] http://kernelnewbies.org/FAQ/KernelCrossCompilation
>
> Thanks,
>
> Rajat
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 14:06 ` Matthias Brugger
0 siblings, 0 replies; 23+ messages in thread
From: Matthias Brugger @ 2014-09-09 14:06 UTC (permalink / raw)
To: Rajat Jain, linux-newbie, kernelnewbies
On 09/09/14 09:58, Rajat Jain wrote:
> Hi,
>
> Can someone tell me if the i386 one is to be used when we want to build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
You can build the kernel with any architecture for any architecture.
This is called cross-compiling. The homepage [0] should explain you how
to do that.
Cheers,
Matthias
[0] http://kernelnewbies.org/FAQ/KernelCrossCompilation
>
> Thanks,
>
> Rajat
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
--
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs
^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 13:21 ` Valdis.Kletnieks
@ 2014-09-09 14:19 ` Paul Bolle
-1 siblings, 0 replies; 23+ messages in thread
From: Paul Bolle @ 2014-09-09 14:19 UTC (permalink / raw)
To: kernelnewbies
On Tue, 2014-09-09 at 09:21 -0400, Valdis.Kletnieks at vt.edu wrote:
> On Tue, 09 Sep 2014 07:58:49 -0000, Rajat Jain said:
> > Can someone tell me if the i386 one is to be used when we want to build for a
> > 32bit machine and the x86_64 is to be used for 64 bit machine?
>
> I wouldn't run either one on an actual machine. Defconfigs are *example*
> configs, only useful as a template for customizing for actual hardware.
It is probably easiest to take the .config file of the latest kernel of
the distribution you are using as a starting point. In that case you
know that this starting point at least works on your machine.
(I remember seeing tutorials that show you how to generate a .config
from scratch. I wonder whether anyone actually does that. It should be
quite a bit of work for an uncertain outcome. Ie, you might end up
trying quite a few configurations before hitting one that works
reasonably for your machine.)
Hope this helps,
Paul Bolle
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 14:19 ` Paul Bolle
0 siblings, 0 replies; 23+ messages in thread
From: Paul Bolle @ 2014-09-09 14:19 UTC (permalink / raw)
To: Valdis.Kletnieks; +Cc: Rajat Jain, linux-newbie, kernelnewbies
On Tue, 2014-09-09 at 09:21 -0400, Valdis.Kletnieks@vt.edu wrote:
> On Tue, 09 Sep 2014 07:58:49 -0000, Rajat Jain said:
> > Can someone tell me if the i386 one is to be used when we want to build for a
> > 32bit machine and the x86_64 is to be used for 64 bit machine?
>
> I wouldn't run either one on an actual machine. Defconfigs are *example*
> configs, only useful as a template for customizing for actual hardware.
It is probably easiest to take the .config file of the latest kernel of
the distribution you are using as a starting point. In that case you
know that this starting point at least works on your machine.
(I remember seeing tutorials that show you how to generate a .config
from scratch. I wonder whether anyone actually does that. It should be
quite a bit of work for an uncertain outcome. Ie, you might end up
trying quite a few configurations before hitting one that works
reasonably for your machine.)
Hope this helps,
Paul Bolle
--
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs
^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 14:19 ` Paul Bolle
@ 2014-09-09 14:26 ` Valdis.Kletnieks
-1 siblings, 0 replies; 23+ messages in thread
From: Valdis.Kletnieks at vt.edu @ 2014-09-09 14:26 UTC (permalink / raw)
To: kernelnewbies
On Tue, 09 Sep 2014 16:19:54 +0200, Paul Bolle said:
> (I remember seeing tutorials that show you how to generate a .config
> from scratch. I wonder whether anyone actually does that.
Distros did that originally. Now they just keep delta'ing their
known-working config. The pain involved was part of why localmodconfig
and friends were created....
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^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 14:26 ` Valdis.Kletnieks
0 siblings, 0 replies; 23+ messages in thread
From: Valdis.Kletnieks @ 2014-09-09 14:26 UTC (permalink / raw)
To: Paul Bolle; +Cc: Rajat Jain, linux-newbie, kernelnewbies
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On Tue, 09 Sep 2014 16:19:54 +0200, Paul Bolle said:
> (I remember seeing tutorials that show you how to generate a .config
> from scratch. I wonder whether anyone actually does that.
Distros did that originally. Now they just keep delta'ing their
known-working config. The pain involved was part of why localmodconfig
and friends were created....
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^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 14:06 ` Matthias Brugger
@ 2014-09-09 14:27 ` Valdis.Kletnieks
-1 siblings, 0 replies; 23+ messages in thread
From: Valdis.Kletnieks at vt.edu @ 2014-09-09 14:27 UTC (permalink / raw)
To: kernelnewbies
On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
> > Can someone tell me if the i386 one is to be used when we want to build for
> > a 32bit machine and the x86_64 is to be used for 64 bit machine?
>
> You can build the kernel with any architecture for any architecture.
> This is called cross-compiling. The homepage [0] should explain you how
> to do that.
Right, but you still need to use a .config appropriate for the target
machine, which is what I think Rajat was asking about.
A defconfig is usually only known verified to boot on a few (possibly one)
examples of that architecture hardware. For embedded ARM, it may be one
specific development board or hardware device. For x86, I think they try
to keep it "will probably kind of sort of boot on generic PC hardware with
a common distro, but anything fancylike a webcam or better graphics than
"vga tty emulation" may not work".
A defconfig is pretty much just a proof of concept starting point for
an actual working config for a given hardware system.
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^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 14:27 ` Valdis.Kletnieks
0 siblings, 0 replies; 23+ messages in thread
From: Valdis.Kletnieks @ 2014-09-09 14:27 UTC (permalink / raw)
To: Matthias Brugger; +Cc: Rajat Jain, linux-newbie, kernelnewbies
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On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
> > Can someone tell me if the i386 one is to be used when we want to build for
> > a 32bit machine and the x86_64 is to be used for 64 bit machine?
>
> You can build the kernel with any architecture for any architecture.
> This is called cross-compiling. The homepage [0] should explain you how
> to do that.
Right, but you still need to use a .config appropriate for the target
machine, which is what I think Rajat was asking about.
A defconfig is usually only known verified to boot on a few (possibly one)
examples of that architecture hardware. For embedded ARM, it may be one
specific development board or hardware device. For x86, I think they try
to keep it "will probably kind of sort of boot on generic PC hardware with
a common distro, but anything fancylike a webcam or better graphics than
"vga tty emulation" may not work".
A defconfig is pretty much just a proof of concept starting point for
an actual working config for a given hardware system.
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^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 14:27 ` Valdis.Kletnieks
@ 2014-09-09 14:34 ` Abreu, Ian
-1 siblings, 0 replies; 23+ messages in thread
From: Abreu, Ian @ 2014-09-09 14:34 UTC (permalink / raw)
To: kernelnewbies
To add to this, if you're trying to compile a kernel to work for a specific
platform or board and it's not working, 'make menuconfig' is your friend for
taking a bare bones kernel .config and making it your own.
-----Original Message-----
From: linux-newbie-owner@vger.kernel.org
[mailto:linux-newbie-owner at vger.kernel.org] On Behalf Of
Valdis.Kletnieks at vt.edu
Sent: Tuesday, September 09, 2014 10:28 AM
To: Matthias Brugger
Cc: Rajat Jain; linux-newbie at vger.kernel.org; kernelnewbies
Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
> > Can someone tell me if the i386 one is to be used when we want to
> > build for a 32bit machine and the x86_64 is to be used for 64 bit
machine?
>
> You can build the kernel with any architecture for any architecture.
> This is called cross-compiling. The homepage [0] should explain you
> how to do that.
Right, but you still need to use a .config appropriate for the target
machine, which is what I think Rajat was asking about.
A defconfig is usually only known verified to boot on a few (possibly one)
examples of that architecture hardware. For embedded ARM, it may be one
specific development board or hardware device. For x86, I think they try to
keep it "will probably kind of sort of boot on generic PC hardware with a
common distro, but anything fancylike a webcam or better graphics than "vga
tty emulation" may not work".
A defconfig is pretty much just a proof of concept starting point for an
actual working config for a given hardware system.
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^ permalink raw reply [flat|nested] 23+ messages in thread
* RE: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 14:34 ` Abreu, Ian
0 siblings, 0 replies; 23+ messages in thread
From: Abreu, Ian @ 2014-09-09 14:34 UTC (permalink / raw)
To: Valdis.Kletnieks, Matthias Brugger
Cc: Rajat Jain, linux-newbie, kernelnewbies
[-- Attachment #1: Type: text/plain, Size: 1592 bytes --]
To add to this, if you're trying to compile a kernel to work for a specific
platform or board and it's not working, 'make menuconfig' is your friend for
taking a bare bones kernel .config and making it your own.
-----Original Message-----
From: linux-newbie-owner@vger.kernel.org
[mailto:linux-newbie-owner@vger.kernel.org] On Behalf Of
Valdis.Kletnieks@vt.edu
Sent: Tuesday, September 09, 2014 10:28 AM
To: Matthias Brugger
Cc: Rajat Jain; linux-newbie@vger.kernel.org; kernelnewbies
Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
> > Can someone tell me if the i386 one is to be used when we want to
> > build for a 32bit machine and the x86_64 is to be used for 64 bit
machine?
>
> You can build the kernel with any architecture for any architecture.
> This is called cross-compiling. The homepage [0] should explain you
> how to do that.
Right, but you still need to use a .config appropriate for the target
machine, which is what I think Rajat was asking about.
A defconfig is usually only known verified to boot on a few (possibly one)
examples of that architecture hardware. For embedded ARM, it may be one
specific development board or hardware device. For x86, I think they try to
keep it "will probably kind of sort of boot on generic PC hardware with a
common distro, but anything fancylike a webcam or better graphics than "vga
tty emulation" may not work".
A defconfig is pretty much just a proof of concept starting point for an
actual working config for a given hardware system.
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^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 14:27 ` Valdis.Kletnieks
@ 2014-09-09 15:11 ` Rajat Jain
-1 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-09 15:11 UTC (permalink / raw)
To: kernelnewbies
Hi,
Thank you all for your responses. I got the answer I was looking for:
> Hello Rajat,
>
> Indeed, the i386 is for 32bits kernels, and x86_64 for 64 bits ones. If you
> generate the configurations using "make ARCH=x86 defconfig" and "make
> ARCH=i386 defconfig", you can easily compare the resulting configurations :
>
> .config from i386_defconfig :
> #
> # Automatically generated file; DO NOT EDIT.
> # Linux/i386 3.17.0-rc1 Kernel Configuration # # CONFIG_64BIT is not set
> CONFIG_X86_32=y CONFIG_X86=y CONFIG_INSTRUCTION_DECODER=y
> CONFIG_OUTPUT_FORMAT="elf32-i386"
> CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
> ...
>
> .config from x86_64_defconfig :
> #
> # Automatically generated file; DO NOT EDIT.
> # Linux/x86 3.17.0-rc1 Kernel Configuration # CONFIG_64BIT=y
> CONFIG_X86_64=y CONFIG_X86=y CONFIG_INSTRUCTION_DECODER=y
> CONFIG_OUTPUT_FORMAT="elf64-x86-64"
> CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
> ...
>
> As you can see, i386 is the 32 bits variant of the x86 architecture. There are of
> course many more differences between these two configurations.
>
> Regards,
>
> Hubert
Thanks all again,
Rajat
> -----Original Message-----
> From: Valdis.Kletnieks at vt.edu [mailto:Valdis.Kletnieks at vt.edu]
> Sent: Tuesday, September 09, 2014 7:28 AM
> To: Matthias Brugger
> Cc: Rajat Jain; linux-newbie at vger.kernel.org; kernelnewbies
> Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
>
> On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
>
> > > Can someone tell me if the i386 one is to be used when we want to
> > > build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
> >
> > You can build the kernel with any architecture for any architecture.
> > This is called cross-compiling. The homepage [0] should explain you
> > how to do that.
>
> Right, but you still need to use a .config appropriate for the target machine,
> which is what I think Rajat was asking about.
>
> A defconfig is usually only known verified to boot on a few (possibly one)
> examples of that architecture hardware. For embedded ARM, it may be one
> specific development board or hardware device. For x86, I think they try to
> keep it "will probably kind of sort of boot on generic PC hardware with a
> common distro, but anything fancylike a webcam or better graphics than "vga
> tty emulation" may not work".
>
> A defconfig is pretty much just a proof of concept starting point for an actual
> working config for a given hardware system.
^ permalink raw reply [flat|nested] 23+ messages in thread
* RE: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 15:11 ` Rajat Jain
0 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-09 15:11 UTC (permalink / raw)
To: Valdis.Kletnieks, Matthias Brugger; +Cc: linux-newbie, kernelnewbies
Hi,
Thank you all for your responses. I got the answer I was looking for:
> Hello Rajat,
>
> Indeed, the i386 is for 32bits kernels, and x86_64 for 64 bits ones. If you
> generate the configurations using "make ARCH=x86 defconfig" and "make
> ARCH=i386 defconfig", you can easily compare the resulting configurations :
>
> .config from i386_defconfig :
> #
> # Automatically generated file; DO NOT EDIT.
> # Linux/i386 3.17.0-rc1 Kernel Configuration # # CONFIG_64BIT is not set
> CONFIG_X86_32=y CONFIG_X86=y CONFIG_INSTRUCTION_DECODER=y
> CONFIG_OUTPUT_FORMAT="elf32-i386"
> CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
> ...
>
> .config from x86_64_defconfig :
> #
> # Automatically generated file; DO NOT EDIT.
> # Linux/x86 3.17.0-rc1 Kernel Configuration # CONFIG_64BIT=y
> CONFIG_X86_64=y CONFIG_X86=y CONFIG_INSTRUCTION_DECODER=y
> CONFIG_OUTPUT_FORMAT="elf64-x86-64"
> CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
> ...
>
> As you can see, i386 is the 32 bits variant of the x86 architecture. There are of
> course many more differences between these two configurations.
>
> Regards,
>
> Hubert
Thanks all again,
Rajat
> -----Original Message-----
> From: Valdis.Kletnieks@vt.edu [mailto:Valdis.Kletnieks@vt.edu]
> Sent: Tuesday, September 09, 2014 7:28 AM
> To: Matthias Brugger
> Cc: Rajat Jain; linux-newbie@vger.kernel.org; kernelnewbies
> Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
>
> On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
>
> > > Can someone tell me if the i386 one is to be used when we want to
> > > build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
> >
> > You can build the kernel with any architecture for any architecture.
> > This is called cross-compiling. The homepage [0] should explain you
> > how to do that.
>
> Right, but you still need to use a .config appropriate for the target machine,
> which is what I think Rajat was asking about.
>
> A defconfig is usually only known verified to boot on a few (possibly one)
> examples of that architecture hardware. For embedded ARM, it may be one
> specific development board or hardware device. For x86, I think they try to
> keep it "will probably kind of sort of boot on generic PC hardware with a
> common distro, but anything fancylike a webcam or better graphics than "vga
> tty emulation" may not work".
>
> A defconfig is pretty much just a proof of concept starting point for an actual
> working config for a given hardware system.
--
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 15:11 ` Rajat Jain
(?)
@ 2014-09-09 15:28 ` Hubert CHAUMETTE
-1 siblings, 0 replies; 23+ messages in thread
From: Hubert CHAUMETTE @ 2014-09-09 15:28 UTC (permalink / raw)
To: Rajat Jain, Valdis.Kletnieks, Matthias Brugger
Cc: linux-newbie, kernelnewbies
Le 09/09/2014 17:11, Rajat Jain a écrit :
> Hi,
>
> Thank you all for your responses. I got the answer I was looking for:
>
>> Hello Rajat,
>>
>> Indeed, the i386 is for 32bits kernels, and x86_64 for 64 bits ones. If you
>> generate the configurations using "make ARCH=x86 defconfig" and "make
>> ARCH=i386 defconfig", you can easily compare the resulting configurations :
>>
>> .config from i386_defconfig :
>> #
>> # Automatically generated file; DO NOT EDIT.
>> # Linux/i386 3.17.0-rc1 Kernel Configuration # # CONFIG_64BIT is not set
>> CONFIG_X86_32=y CONFIG_X86=y CONFIG_INSTRUCTION_DECODER=y
>> CONFIG_OUTPUT_FORMAT="elf32-i386"
>> CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
>> ...
>>
>> .config from x86_64_defconfig :
>> #
>> # Automatically generated file; DO NOT EDIT.
>> # Linux/x86 3.17.0-rc1 Kernel Configuration # CONFIG_64BIT=y
>> CONFIG_X86_64=y CONFIG_X86=y CONFIG_INSTRUCTION_DECODER=y
>> CONFIG_OUTPUT_FORMAT="elf64-x86-64"
>> CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
>> ...
>>
>> As you can see, i386 is the 32 bits variant of the x86 architecture. There are of
>> course many more differences between these two configurations.
>>
>> Regards,
>>
>> Hubert
> Thanks all again,
>
> Rajat
>
>
>> -----Original Message-----
>> From: Valdis.Kletnieks@vt.edu [mailto:Valdis.Kletnieks@vt.edu]
>> Sent: Tuesday, September 09, 2014 7:28 AM
>> To: Matthias Brugger
>> Cc: Rajat Jain; linux-newbie@vger.kernel.org; kernelnewbies
>> Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
>>
>> On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
>>
>>>> Can someone tell me if the i386 one is to be used when we want to
>>>> build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
>>> You can build the kernel with any architecture for any architecture.
>>> This is called cross-compiling. The homepage [0] should explain you
>>> how to do that.
>> Right, but you still need to use a .config appropriate for the target machine,
>> which is what I think Rajat was asking about.
>>
>> A defconfig is usually only known verified to boot on a few (possibly one)
>> examples of that architecture hardware. For embedded ARM, it may be one
>> specific development board or hardware device. For x86, I think they try to
>> keep it "will probably kind of sort of boot on generic PC hardware with a
>> common distro, but anything fancylike a webcam or better graphics than "vga
>> tty emulation" may not work".
>>
>> A defconfig is pretty much just a proof of concept starting point for an actual
>> working config for a given hardware system.
> --
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> the body of a message to majordomo@vger.kernel.org
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Sorry, I mistakenly replied only to the OP.
--
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^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 14:27 ` Valdis.Kletnieks
@ 2014-09-09 17:51 ` Rajat Jain
-1 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-09 17:51 UTC (permalink / raw)
To: kernelnewbies
Hi,
> -----Original Message-----
> From: Valdis.Kletnieks at vt.edu [mailto:Valdis.Kletnieks at vt.edu]
> Sent: Tuesday, September 09, 2014 7:28 AM
> To: Matthias Brugger
> Cc: Rajat Jain; linux-newbie at vger.kernel.org; kernelnewbies
> Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
>
> On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
>
> > > Can someone tell me if the i386 one is to be used when we want to
> > > build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
> >
> > You can build the kernel with any architecture for any architecture.
> > This is called cross-compiling. The homepage [0] should explain you
> > how to do that.
>
> Right, but you still need to use a .config appropriate for the target machine,
> which is what I think Rajat was asking about.
Right.
I'm trying to generate x86 images for someone else to test, who's going to test it on a standard / generic x86 machine:
https://lkml.org/lkml/2014/9/9/35
What I was not sure is that which config should I use to generate an image for a "standard x86 machine". Now I do understand (I provided him 2 images - 1 for the 32 bit (using i386_defconfig) and another for 64 bit (using x86_64_defconfig).
Thanks,
Rajat
>
> A defconfig is usually only known verified to boot on a few (possibly one)
> examples of that architecture hardware. For embedded ARM, it may be one
> specific development board or hardware device. For x86, I think they try to
> keep it "will probably kind of sort of boot on generic PC hardware with a
> common distro, but anything fancylike a webcam or better graphics than "vga
> tty emulation" may not work".
>
> A defconfig is pretty much just a proof of concept starting point for an actual
> working config for a given hardware system.
^ permalink raw reply [flat|nested] 23+ messages in thread
* RE: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-09 17:51 ` Rajat Jain
0 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-09 17:51 UTC (permalink / raw)
To: Valdis.Kletnieks, Matthias Brugger; +Cc: linux-newbie, kernelnewbies
Hi,
> -----Original Message-----
> From: Valdis.Kletnieks@vt.edu [mailto:Valdis.Kletnieks@vt.edu]
> Sent: Tuesday, September 09, 2014 7:28 AM
> To: Matthias Brugger
> Cc: Rajat Jain; linux-newbie@vger.kernel.org; kernelnewbies
> Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
>
> On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
>
> > > Can someone tell me if the i386 one is to be used when we want to
> > > build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
> >
> > You can build the kernel with any architecture for any architecture.
> > This is called cross-compiling. The homepage [0] should explain you
> > how to do that.
>
> Right, but you still need to use a .config appropriate for the target machine,
> which is what I think Rajat was asking about.
Right.
I'm trying to generate x86 images for someone else to test, who's going to test it on a standard / generic x86 machine:
https://lkml.org/lkml/2014/9/9/35
What I was not sure is that which config should I use to generate an image for a "standard x86 machine". Now I do understand (I provided him 2 images - 1 for the 32 bit (using i386_defconfig) and another for 64 bit (using x86_64_defconfig).
Thanks,
Rajat
>
> A defconfig is usually only known verified to boot on a few (possibly one)
> examples of that architecture hardware. For embedded ARM, it may be one
> specific development board or hardware device. For x86, I think they try to
> keep it "will probably kind of sort of boot on generic PC hardware with a
> common distro, but anything fancylike a webcam or better graphics than "vga
> tty emulation" may not work".
>
> A defconfig is pretty much just a proof of concept starting point for an actual
> working config for a given hardware system.
--
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs
^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-09 7:58 ` Rajat Jain
@ 2014-09-13 1:10 ` Peter Teoh
-1 siblings, 0 replies; 23+ messages in thread
From: Peter Teoh @ 2014-09-13 1:10 UTC (permalink / raw)
To: kernelnewbies
On Tue, Sep 9, 2014 at 3:58 PM, Rajat Jain <rajatjain@juniper.net> wrote:
> Hi,
>
> Can someone tell me if the i386 one is to be used when we want to build
> for a 32bit machine and the x86_64 is to be used for 64 bit machine?
>
i386 or 32-bit machines? i think it don't exists anymore, but what likely
is correct: i386-compatible machine.
The i386 config is for 32-bit OS, ie, the entire binaries must be build for
32-bit architecture.
So choose the correct config provided u have the correct userspace
files/libraries to support it.
>
> Thanks,
>
> Rajat
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
--
Regards,
Peter Teoh
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^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-13 1:10 ` Peter Teoh
0 siblings, 0 replies; 23+ messages in thread
From: Peter Teoh @ 2014-09-13 1:10 UTC (permalink / raw)
To: Rajat Jain; +Cc: linux-newbie, kernelnewbies
[-- Attachment #1.1: Type: text/plain, Size: 774 bytes --]
On Tue, Sep 9, 2014 at 3:58 PM, Rajat Jain <rajatjain@juniper.net> wrote:
> Hi,
>
> Can someone tell me if the i386 one is to be used when we want to build
> for a 32bit machine and the x86_64 is to be used for 64 bit machine?
>
i386 or 32-bit machines? i think it don't exists anymore, but what likely
is correct: i386-compatible machine.
The i386 config is for 32-bit OS, ie, the entire binaries must be build for
32-bit architecture.
So choose the correct config provided u have the correct userspace
files/libraries to support it.
>
> Thanks,
>
> Rajat
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies@kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
--
Regards,
Peter Teoh
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_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 23+ messages in thread
* x86_64_defconfig and i386_defconfig: What is the difference?
2014-09-13 1:10 ` Peter Teoh
@ 2014-09-13 3:44 ` Rajat Jain
-1 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-13 3:44 UTC (permalink / raw)
To: kernelnewbies
Thanks,
One more question. Can I continue to use my same 64bit compiler when compiling images for both?
In the other words, Are both of these ok?
Make CROSS_COMPILE=my-compiler-path- i386_defconfig
Make CROSS_COMPILE=my-compiler-path- all
Make CROSS_COMPILE=my-compiler-path- x86_64_defconfig
Make CROSS_COMPILE=my-compiler-path- all
Where my-compiler-path is the gcc compiler that I use to generate 64 bit code.
Thanks,
Rajat
From: Peter Teoh [mailto:htmldeveloper at gmail.com]
Sent: Friday, September 12, 2014 6:10 PM
To: Rajat Jain
Cc: linux-newbie at vger.kernel.org; kernelnewbies
Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
On Tue, Sep 9, 2014 at 3:58 PM, Rajat Jain <rajatjain at juniper.net<mailto:rajatjain@juniper.net>> wrote:
Hi,
Can someone tell me if the i386 one is to be used when we want to build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
i386 or 32-bit machines? i think it don't exists anymore, but what likely is correct: i386-compatible machine.
The i386 config is for 32-bit OS, ie, the entire binaries must be build for 32-bit architecture.
So choose the correct config provided u have the correct userspace files/libraries to support it.
Thanks,
Rajat
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies at kernelnewbies.org<mailto:Kernelnewbies@kernelnewbies.org>
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
--
Regards,
Peter Teoh
-------------- next part --------------
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^ permalink raw reply [flat|nested] 23+ messages in thread
* RE: x86_64_defconfig and i386_defconfig: What is the difference?
@ 2014-09-13 3:44 ` Rajat Jain
0 siblings, 0 replies; 23+ messages in thread
From: Rajat Jain @ 2014-09-13 3:44 UTC (permalink / raw)
To: Peter Teoh; +Cc: linux-newbie, kernelnewbies
[-- Attachment #1.1: Type: text/plain, Size: 1536 bytes --]
Thanks,
One more question. Can I continue to use my same 64bit compiler when compiling images for both?
In the other words, Are both of these ok?
Make CROSS_COMPILE=my-compiler-path- i386_defconfig
Make CROSS_COMPILE=my-compiler-path- all
Make CROSS_COMPILE=my-compiler-path- x86_64_defconfig
Make CROSS_COMPILE=my-compiler-path- all
Where my-compiler-path is the gcc compiler that I use to generate 64 bit code.
Thanks,
Rajat
From: Peter Teoh [mailto:htmldeveloper@gmail.com]
Sent: Friday, September 12, 2014 6:10 PM
To: Rajat Jain
Cc: linux-newbie@vger.kernel.org; kernelnewbies
Subject: Re: x86_64_defconfig and i386_defconfig: What is the difference?
On Tue, Sep 9, 2014 at 3:58 PM, Rajat Jain <rajatjain@juniper.net<mailto:rajatjain@juniper.net>> wrote:
Hi,
Can someone tell me if the i386 one is to be used when we want to build for a 32bit machine and the x86_64 is to be used for 64 bit machine?
i386 or 32-bit machines? i think it don't exists anymore, but what likely is correct: i386-compatible machine.
The i386 config is for 32-bit OS, ie, the entire binaries must be build for 32-bit architecture.
So choose the correct config provided u have the correct userspace files/libraries to support it.
Thanks,
Rajat
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org<mailto:Kernelnewbies@kernelnewbies.org>
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
--
Regards,
Peter Teoh
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_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
^ permalink raw reply [flat|nested] 23+ messages in thread
end of thread, other threads:[~2014-09-13 3:44 UTC | newest]
Thread overview: 23+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-09-09 7:58 x86_64_defconfig and i386_defconfig: What is the difference? Rajat Jain
2014-09-09 7:58 ` Rajat Jain
2014-09-09 13:21 ` Valdis.Kletnieks at vt.edu
2014-09-09 13:21 ` Valdis.Kletnieks
2014-09-09 14:19 ` Paul Bolle
2014-09-09 14:19 ` Paul Bolle
2014-09-09 14:26 ` Valdis.Kletnieks at vt.edu
2014-09-09 14:26 ` Valdis.Kletnieks
2014-09-09 14:06 ` Matthias Brugger
2014-09-09 14:06 ` Matthias Brugger
2014-09-09 14:27 ` Valdis.Kletnieks at vt.edu
2014-09-09 14:27 ` Valdis.Kletnieks
2014-09-09 14:34 ` Abreu, Ian
2014-09-09 14:34 ` Abreu, Ian
2014-09-09 15:11 ` Rajat Jain
2014-09-09 15:11 ` Rajat Jain
2014-09-09 15:28 ` Hubert CHAUMETTE
2014-09-09 17:51 ` Rajat Jain
2014-09-09 17:51 ` Rajat Jain
2014-09-13 1:10 ` Peter Teoh
2014-09-13 1:10 ` Peter Teoh
2014-09-13 3:44 ` Rajat Jain
2014-09-13 3:44 ` Rajat Jain
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