Cross Compile Kernel Modules

Cross Compile Kernel Modules

[Parker Mackenzie]

I have been researching a way to build loadable kernel modules outside of Yocto for a while. I was excited to find a presentation from the Yocto Developer's Day 2013 which implied I code do this by adding the following line to my local.conf:
IMAGE_INSTALL_append = " kernel_dev"

However, when I ran bitbake for my beagleboard target I get the following error. Any help in understanding what is wrong and how to achieve my goal would be most helpful.

Kind Regards,
Parker Mackenzie



[parker@jasper build]$ bitbake core-image-minimal
Parsing recipes: 100% |#########################################| Time: 00:03:55
Parsing of 814 .bb files complete (0 cached, 814 parsed). 1121 targets, 43 skipped, 0 masked, 0 errors.

Build Configuration:
BB_VERSION        = "1.18.0"
BUILD_SYS         = "x86_64-linux"
NATIVELSBSTRING   = "Fedora-17"
TARGET_SYS        = "arm-poky-linux-gnueabi"
MACHINE           = "beagleboard"
DISTRO            = "poky"
DISTRO_VERSION    = "1.4.2"
TUNE_FEATURES     = "armv7a vfp neon"
TARGET_FPU        = "vfp-neon"
meta              
meta-yocto        
meta-yocto-bsp    = "<unknown>:<unknown>"

NOTE: Resolving any missing task queue dependencies
ERROR: Nothing RPROVIDES 'kernel_dev' (but /home/parker/Projects/beagleboard/yocto/poky-dylan-9.0.2/meta/recipes-core/images/core-image-minimal.bb RDEPENDS on or otherwise requires it)
NOTE: Runtime target 'kernel_dev' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['kernel_dev']
ERROR: Required build target 'core-image-minimal' has no buildable providers.
Missing or unbuildable dependency chain was: ['core-image-minimal', 'kernel_dev']

Summary: There were 2 ERROR messages shown, returning a non-zero exit code. 		 	   		  

Re: Cross Compile Kernel Modules

[Bruce Ashfield]

On 13-10-03 04:08 PM, Parker Mackenzie wrote:
> I have been researching a way to build loadable kernel modules outside of Yocto for a while. I was excited to find a presentation from the Yocto Developer's Day 2013 which implied I code do this by adding the following line to my local.conf:
> IMAGE_INSTALL_append = " kernel_dev"
>
> However, when I ran bitbake for my beagleboard target I get the following error. Any help in understanding what is wrong and how to achieve my goal would be most helpful.

Try "kernel-dev"

Bruce

>
> Kind Regards,
> Parker Mackenzie
>
>
>
> [parker@jasper build]$ bitbake core-image-minimal
> Parsing recipes: 100% |#########################################| Time: 00:03:55
> Parsing of 814 .bb files complete (0 cached, 814 parsed). 1121 targets, 43 skipped, 0 masked, 0 errors.
>
> Build Configuration:
> BB_VERSION        = "1.18.0"
> BUILD_SYS         = "x86_64-linux"
> NATIVELSBSTRING   = "Fedora-17"
> TARGET_SYS        = "arm-poky-linux-gnueabi"
> MACHINE           = "beagleboard"
> DISTRO            = "poky"
> DISTRO_VERSION    = "1.4.2"
> TUNE_FEATURES     = "armv7a vfp neon"
> TARGET_FPU        = "vfp-neon"
> meta
> meta-yocto
> meta-yocto-bsp    = "<unknown>:<unknown>"
>
> NOTE: Resolving any missing task queue dependencies
> ERROR: Nothing RPROVIDES 'kernel_dev' (but /home/parker/Projects/beagleboard/yocto/poky-dylan-9.0.2/meta/recipes-core/images/core-image-minimal.bb RDEPENDS on or otherwise requires it)
> NOTE: Runtime target 'kernel_dev' is unbuildable, removing...
> Missing or unbuildable dependency chain was: ['kernel_dev']
> ERROR: Required build target 'core-image-minimal' has no buildable providers.
> Missing or unbuildable dependency chain was: ['core-image-minimal', 'kernel_dev']
>
> Summary: There were 2 ERROR messages shown, returning a non-zero exit code. 		 	   		
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto
>

Re: Cross Compile Kernel Modules

[Parker Mackenzie]

Thanks Bruce,

That got me further. I added a comment to the video on YouTube which might help others which stumble across the presentation.

Now I get the following error
ERROR: Function failed: do_rootfs

Which points me to a log file which indicates the following failed:


Note: adding Smart RPM DB channel

Note: to be installed: packagegroup-core-tools-debug@beagleboard kernel-dev@beagleboard rpm-postinsts@all packagegroup-core-boot@beagleboard libstdc++6@armv7a_vfp_neon
Loading cache...
Updating cache... ######################################## [100%]

Computing transaction...error: Can't install kernel-dev-3.4.43+git0+1bab5bd090948b4cc4c4ed57c834603a3cf9f235_c994390cfa28339cbc1ec3b56eeec83a5fa75bb7-r4.4@beagleboard: no package provides /usr/bin/python

Saving cache...

ERROR: Function failed: do_rootfs (see /home/parker/Projects/beagleboard/yocto/poky-dylan-9.0.2/build/tmp/work/beagleboard-poky-linux-gnueabi/core-image-minimal/1.0-r0/temp/log.do_rootfs.61003 for further information)


However :
[parker@jasper build]$ which python
/usr/bin/python


I have gone through the documentation; however, feel free to point me at a resource if this is a silly new-guy question. An internet search did bring up the following nugget; patch 2/3 sounds related, however, I am not sure how to proceed.
http://comments.gmane.org/gmane.comp.handhelds.openembedded.core/34245

Thanks in advance,
Parker 		 	   		  

Re: Cross Compile Kernel Modules

[Bruce Ashfield]

On 13-10-03 8:21 PM, Parker Mackenzie wrote:
> Thanks Bruce,
>
> That got me further. I added a comment to the video on YouTube which might help others which stumble across the presentation.
>
> Now I get the following error
> ERROR: Function failed: do_rootfs
>
> Which points me to a log file which indicates the following failed:
>
>
> Note: adding Smart RPM DB channel
>
> Note: to be installed: packagegroup-core-tools-debug@beagleboard kernel-dev@beagleboard rpm-postinsts@all packagegroup-core-boot@beagleboard libstdc++6@armv7a_vfp_neon
> Loading cache...
> Updating cache... ######################################## [100%]
>
> Computing transaction...error: Can't install kernel-dev-3.4.43+git0+1bab5bd090948b4cc4c4ed57c834603a3cf9f235_c994390cfa28339cbc1ec3b56eeec83a5fa75bb7-r4.4@beagleboard: no package provides /usr/bin/python
>
> Saving cache...
>
> ERROR: Function failed: do_rootfs (see /home/parker/Projects/beagleboard/yocto/poky-dylan-9.0.2/build/tmp/work/beagleboard-poky-linux-gnueabi/core-image-minimal/1.0-r0/temp/log.do_rootfs.61003 for further information)
>
>
> However :
> [parker@jasper build]$ which python
> /usr/bin/python

That would be your build host's python. The kernel module is pulling it
in as a dependency for the target, so it needs to be part of the rootfs
packages.

Check that your have python in your dependencies/image install lists,
which bitbake -e <your image type> will dump ... among many other
things :)

Which image type are you building ? core-image-minimal ? Try adding this
to your local.conf: IMAGE_INSTALL_append = " python"

Cheers,

Bruce

>
>
> I have gone through the documentation; however, feel free to point me at a resource if this is a silly new-guy question. An internet search did bring up the following nugget; patch 2/3 sounds related, however, I am not sure how to proceed.
> http://comments.gmane.org/gmane.comp.handhelds.openembedded.core/34245
>
> Thanks in advance,
> Parker 		 	   		
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto
>

Re: Cross Compile Kernel Modules

[Hans Beckérus]

On Fri, Oct 4, 2013 at 2:53 AM, Bruce Ashfield
<bruce.ashfield@windriver.com> wrote:
> On 13-10-03 8:21 PM, Parker Mackenzie wrote:
>>
>> Thanks Bruce,
>>
>> That got me further. I added a comment to the video on YouTube which might
>> help others which stumble across the presentation.
>>
>> Now I get the following error
>> ERROR: Function failed: do_rootfs
>>
>> Which points me to a log file which indicates the following failed:
>>
>>
>> Note: adding Smart RPM DB channel
>>
>> Note: to be installed: packagegroup-core-tools-debug@beagleboard
>> kernel-dev@beagleboard rpm-postinsts@all packagegroup-core-boot@beagleboard
>> libstdc++6@armv7a_vfp_neon
>> Loading cache...
>> Updating cache... ######################################## [100%]
>>
>> Computing transaction...error: Can't install
>> kernel-dev-3.4.43+git0+1bab5bd090948b4cc4c4ed57c834603a3cf9f235_c994390cfa28339cbc1ec3b56eeec83a5fa75bb7-r4.4@beagleboard:
>> no package provides /usr/bin/python
>>
>> Saving cache...
>>
>> ERROR: Function failed: do_rootfs (see
>> /home/parker/Projects/beagleboard/yocto/poky-dylan-9.0.2/build/tmp/work/beagleboard-poky-linux-gnueabi/core-image-minimal/1.0-r0/temp/log.do_rootfs.61003
>> for further information)
>>
>>
>> However :
>> [parker@jasper build]$ which python
>> /usr/bin/python
>
>
> That would be your build host's python. The kernel module is pulling it
> in as a dependency for the target, so it needs to be part of the rootfs
> packages.
>
> Check that your have python in your dependencies/image install lists,
> which bitbake -e <your image type> will dump ... among many other
> things :)
>
> Which image type are you building ? core-image-minimal ? Try adding this
> to your local.conf: IMAGE_INSTALL_append = " python"
>
Bruce, is not the proper package to add in this case python-core? I do
not think anything simply provides just "python", or is it?

> Cheers,
>
> Bruce
>
>
>>
>>
>> I have gone through the documentation; however, feel free to point me at a
>> resource if this is a silly new-guy question. An internet search did bring
>> up the following nugget; patch 2/3 sounds related, however, I am not sure
>> how to proceed.
>> http://comments.gmane.org/gmane.comp.handhelds.openembedded.core/34245
>>
>> Thanks in advance,
>> Parker
>> _______________________________________________
>> yocto mailing list
>> yocto@yoctoproject.org
>> https://lists.yoctoproject.org/listinfo/yocto
>>
>
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto

Re: Cross Compile Kernel Modules

[Parker Mackenzie]

Hans,

Python did not work but as you point out python-core did. I found this last night looking at the IRC logs from March 8th. 

I also needed to add bash. The build now completes, this morning I am going to attempt to extract the SDK with the sysroot and then attempt to build the application and my drivers against them. 

Thanks for the help,
Parker

> On Oct 4, 2013, at 7:05 AM, "Hans Beckérus" <hans.beckerus@gmail.com> wrote:
> 
> Bruce, is not the proper package to add in this case python-core? I do
> not think anything simply provides just "python", or is it?

Re: Cross Compile Kernel Modules

[Bruce Ashfield]

On 13-10-04 07:22 AM, Parker Mackenzie wrote:
> Hans,
>
> Python did not work but as you point out python-core did. I found this last night looking at the IRC logs from March 8th.
>

Right! I typed in "python" from memory :) In fact, what I typically have is
a full set of python dependencies, including python-dev, which picks
up what I need.

Cheers,

Bruce

> I also needed to add bash. The build now completes, this morning I am going to attempt to extract the SDK with the sysroot and then attempt to build the application and my drivers against them.
>
> Thanks for the help,
> Parker
>
>> On Oct 4, 2013, at 7:05 AM, "Hans Beckérus" <hans.beckerus@gmail.com> wrote:
>>
>> Bruce, is not the proper package to add in this case python-core? I do
>> not think anything simply provides just "python", or is it?
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto
>

Re: Cross Compile Kernel Modules

[Parker Mackenzie]

Bruce, No problem... you got me on the right path.

Bitbake now completes successfully after adding python-core and bash to IMAGE_INSTALL_append.



Looking again at the presentation it indicated I also needed to do the following:
make oldconfig ARCH=arm
 - This completed successfully

make scripts ARCH=arm
 - This fails with the following errors:

[parker@jasper kernel]$ make scripts ARCH=arm
scripts/kconfig/conf --silentoldconfig Kconfig
  CC      scripts/mod/empty.o
gcc: error: unrecognized command line option ‘-mlittle-endian’
gcc: error: unrecognized command line option ‘-mapcs’
gcc: error: unrecognized command line option ‘-mno-sched-prolog’
gcc: error: unrecognized argument in option ‘-mabi=aapcs-linux’
gcc: note: valid arguments to ‘-mabi=’ are: ms sysv
gcc: error: unrecognized command line option ‘-mno-thumb-interwork’
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2

The cross compiler seems to be correct...:
[parker@jasper kernel]$ echo $CC
arm-poky-linux-gnueabi-gcc -march=armv7-a -mthumb-interwork -mfloat-abi=softfp -mfpu=neon --sysroot=/home/parker/Projects/beagleboard/yocto/poky-dylan-9.0.2/sdk/sysroots/armv7a-vfp-neon-poky-linux-gnueabi


Trying to build this on:
Linux jasper 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux






>
> Right! I typed in "python" from memory :) In fact, what I typically have is
> a full set of python dependencies, including python-dev, which picks
> up what I need.
>
> Cheers,
>
> Bruce
> 		 	   		  

Re: Cross Compile Kernel Modules

[Bruce Ashfield]

On 13-10-04 5:06 PM, Parker Mackenzie wrote:
> Bruce, No problem... you got me on the right path.
>
> Bitbake now completes successfully after adding python-core and bash to IMAGE_INSTALL_append.
>
>
>
> Looking again at the presentation it indicated I also needed to do the following:
> make oldconfig ARCH=arm
>   - This completed successfully
>
> make scripts ARCH=arm
>   - This fails with the following errors:
>
> [parker@jasper kernel]$ make scripts ARCH=arm
> scripts/kconfig/conf --silentoldconfig Kconfig
>    CC      scripts/mod/empty.o
> gcc: error: unrecognized command line option ‘-mlittle-endian’
> gcc: error: unrecognized command line option ‘-mapcs’
> gcc: error: unrecognized command line option ‘-mno-sched-prolog’
> gcc: error: unrecognized argument in option ‘-mabi=aapcs-linux’
> gcc: note: valid arguments to ‘-mabi=’ are: ms sysv
> gcc: error: unrecognized command line option ‘-mno-thumb-interwork’
> make[2]: *** [scripts/mod/empty.o] Error 1
> make[1]: *** [scripts/mod] Error 2
> make: *** [scripts] Error 2
>
> The cross compiler seems to be correct...:
> [parker@jasper kernel]$ echo $CC
> arm-poky-linux-gnueabi-gcc -march=armv7-a -mthumb-interwork -mfloat-abi=softfp -mfpu=neon --sysroot=/home/parker/Projects/beagleboard/yocto/poky-dylan-9.0.2/sdk/sysroots/armv7a-vfp-neon-poky-linux-gnueabi
>

But for the scripts, you won't be using the cross compiler, they are
native to your arch.

Check your environment, are CC and CFLAGS set ? How exactly are you
invoking that command (i.e. from where, just a shell in the kernel
source directory?). If non native flags and compiler is leaking into
the build, you'll get exactly the error that you are seeing.

 From the error, looks like the native gcc was used, and it was fed
the ARM flags. Not what it'll like :)

Cheers,

Bruce

>
> Trying to build this on:
> Linux jasper 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
>
>
>
>
>
>
>>
>> Right! I typed in "python" from memory :) In fact, what I typically have is
>> a full set of python dependencies, including python-dev, which picks
>> up what I need.
>>
>> Cheers,
>>
>> Bruce
>> 		 	   		
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto
>