| View previous topic :: View next topic |
| Author |
Message |
okapi
n00b
Joined: 11 Feb 2003
Posts: 42
Location: Bromont, Canada
|
 Posted: Sun Dec 04, 2005 10:50 pm Post subject: Howto create a crosscompiler/64bits kernel on 32bit install. |
 |
|
Here's a little howto on how to create a crosscompiler and a 64bits kernel on a 32bit install running on amd64.
| Code: | | emerge sys-devel/crossdev |
Build your crosscompiler.
| Code: | | crossdev -t x86_64-pc-linux-gnu |
Clean up your kernel source tree. (This step is very important because 32bits configs are different than 64bits)
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- mrproper |
Configure your kernel.
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- menuconfig |
Note:
It is a good idea to use the option General Setup ---> Local version - append to kernel release with somthing like -x86_64 if you dont want to overwrite you running kernel and modules.
Don't forget to set Executable file formats / Emulations --->IA32 Emulation or be a fool!
Compile your kernel.
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- |
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- modules_install |
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- install |
Create a new Grub or Lilo entry.
And Voila! You now have a 64bits Kernel and a 64bits crosscompiler.
_________________
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCS d++(-) s: a40 C+++>++++$ ULS++++$ P- L+++ E--- W+++ N+ o++ K? w---
!O M- V-- PS+ PE- Y+(++) PGP++>+++ t+ 5 X+++ R tv b+ DI++ D G e++ h--
r++ y+++
------END GEEK CODE BLOCK------ |
|
| Back to top |
|
 |
satanskin
Guru
Joined: 25 Apr 2005
Posts: 353
|
| Posted: Wed Dec 07, 2005 7:49 am Post subject: |
|
|
| Just to make things extremely clear, is this for running on a 64-bit processor or a 32-bit processor to compile 64-bit binaries? |
|
| Back to top |
|
|
okapi
n00b
Joined: 11 Feb 2003
Posts: 42
Location: Bromont, Canada
|
| Posted: Wed Dec 07, 2005 12:22 pm Post subject: |
|
|
| satanskin wrote: | | Just to make things extremely clear, is this for running on a 64-bit processor or a 32-bit processor to compile 64-bit binaries? |
I recently changed my MoBo and Cpu. I have a Athlon64 running in 32bit on my old athlon-xp install.
_________________
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCS d++(-) s: a40 C+++>++++$ ULS++++$ P- L+++ E--- W+++ N+ o++ K? w---
!O M- V-- PS+ PE- Y+(++) PGP++>+++ t+ 5 X+++ R tv b+ DI++ D G e++ h--
r++ y+++
------END GEEK CODE BLOCK------ |
|
| Back to top |
|
|
Skotlex
Guru
Joined: 13 Mar 2004
Posts: 306
|
| Posted: Mon Apr 04, 2011 8:16 pm Post subject: |
|
|
*brushes dust off topic* Ahem, it's been five years, but this guide is exactly what I was looking for. I've been searching for a while on a way to test out a 64-bit kernel on an otherwise pure 32-bit system.
I hope the guide still works (I will try it in a while), but I have two questions that should be addressed for those who want to follow this:
- Will using modules work as normally, or must this kernel be static and have all modules compiled in?
- What about nvidia graphic cards users? Is there some guide/right method of compilation, or you shouldn't even try? Or is nouveau the only way?
EDIT: So here are my findings:
1. If you want a crosscompiler ONLY for building your 64bit kernel, you can change the command:
| Code: | | crossdev -t x86_64-pc-linux-gnu |
for
| Code: | | crossdev -t x86_64-pc-linux-gnu -s1 |
As that will only give you a GCC capable of producing 64bit executables.
2. Current kernels have a 'Cross-compiler tool prefix' (CONFIG_CROSS_COMPILE) which is a good way to store the CROSS_COMPILE variable. By setting CONFIG_CROSS_COMPILE=x86_64-pc-linux-gnu-, you can change the compilation commands from:
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- |
to
3. nvidia-drivers seems to be a hassle to compile, because the X11 driver should be compiled in 32bit while the kernel module in 64bit :/ I just dumped that and changed to Nouveau, that was way easier.
All in all, this guide still works. |
|
| Back to top |
|
|
alex6
Apprentice
Joined: 18 Jul 2011
Posts: 176
|
| Posted: Tue Jul 09, 2013 10:10 am Post subject: |
|
|
| This guide still work 10 years after but I'm surprised in all this time there is still no workaround for nvidia !!!! |
|
| Back to top |
|
|
fberger
Tux's lil' helper
Joined: 04 Dec 2006
Posts: 89
Location: Germany
|
| Posted: Thu Jun 08, 2017 12:00 pm Post subject: |
|
|
The recipe is still working in 2017. Thanks.
| Code: | $ uname -a
Linux - 4.10.11-gentoo-x86_64 #1 SMP PREEMPT - x86_64 Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz GenuineIntel GNU/Linux |
|
|
| Back to top |
|
|
kosik
n00b
Joined: 09 Nov 2007
Posts: 20
Location: 127.0.0.1
|
| Posted: Tue Aug 08, 2017 8:29 pm Post subject: Re: Howto create a crosscompiler/64bits kernel on 32bit inst |
|
|
| okapi wrote: | Here's a little howto on how to create a crosscompiler and a 64bits kernel on a 32bit install running on amd64.
| Code: | | emerge sys-devel/crossdev |
Build your crosscompiler.
| Code: | | crossdev -t x86_64-pc-linux-gnu |
Clean up your kernel source tree. (This step is very important because 32bits configs are different than 64bits)
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- mrproper |
Configure your kernel.
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- menuconfig |
Note:
It is a good idea to use the option General Setup ---> Local version - append to kernel release with somthing like -x86_64 if you dont want to overwrite you running kernel and modules.
Don't forget to set Executable file formats / Emulations --->IA32 Emulation or be a fool!
Compile your kernel.
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- |
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- modules_install |
| Code: | | make ARCH=x86_64 CROSS_COMPILE=x86_64-pc-linux-gnu- install |
Create a new Grub or Lilo entry.
And Voila! You now have a 64bits Kernel and a 64bits crosscompiler. |
How many headaches has this 12 years old post solved? Many, I guess! After working around the gold linker and some specialities I have in make.conf it worked like a charme in 2017.
Thanks, dude. I owe you a beer... |
|
| Back to top |
|
|
kosik
n00b
Joined: 09 Nov 2007
Posts: 20
Location: 127.0.0.1
|
| Posted: Tue Aug 08, 2017 8:31 pm Post subject: |
|
|
| fberger wrote: | The recipe is still working in 2017. Thanks.
| Code: | $ uname -a
Linux - 4.10.11-gentoo-x86_64 #1 SMP PREEMPT - x86_64 Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz GenuineIntel GNU/Linux |
|
Whoa, I didn't read through the whole thread... but this, Sir, is awesome! ...see my post above. |
|
| Back to top |
|
|
|
Documentation, Tips & Tricks
