[yocto] Kernel header generation

[Sarayu Krishna Sivanandam]

Hi Khem .

Thanks for your response. But i am not sure if i understand clearly. My
intention here is to generate kernel headers and i wanted to understand how
to do the same .

Based on some online reference , I tried to add the lines (
IMAGE_INSTALL_append
= " kernel-devsrc"
TOOLCHAIN_TARGET_TASK_append = " kernel-devsrc") in my image file but got
some errors as shown below.
ERROR: Nothing RPROVIDES 'kernel-devsrc' (but
/home/sarayu/freescale/v2.0/Freescale-Linux-SDK-for-LS1021A-Rev2-v0.4-20150803-yocto/meta-fsl-networking/images/
fsl-image-core.bb RDEPENDS on or otherwise requires it)
NOTE: Runtime target 'kernel-devsrc' is unbuildable, removing...
ERROR: Required build target 'fsl-image-core' has no buildable providers.


I understood that the kernel-devsrc.bb is not present in my SDK and i tried
to manually add it in the kernel-recipies by using the online link (
https://github.com/01org/luv-yocto/blob/master/meta/recipes-kernel/linux/kernel-devsrc.bb)
but looks like it has some additional dependencies as my build failed again
with the below error.

ERROR: ExpansionError during parsing /home/sarayu/freescale/v2.0/
Freescale-Linux-SDK-for-LS1021A-Rev2-v0.4-20150803-
yocto/meta-fsl-networking/images/fsl-image-core.bb: Failure expanding
variable KERNEL_VERSION: ExpansionError: Failure expanding variable
KERNEL_VERSION, expression was ${@get_kernelversion_headers('
/home/sarayu/freescale/v2.0/Freescale-Linux-SDK-for-
LS1021A-Rev2-v0.4-20150803-yocto/build_ls1021atwr_release/tmp/sysroots/ls1021atwr/usr/src/kernel')}
which triggered exception NameError: name 'get_kernelversion_headers' is
not defined

My question is how can we generate kernel headers from yocto source . If
you have any reference or sample for the same please do share it with me .

Thanks in advance for your help.


Thanks and Regards,
Sarayu K S
Tech Lead
Zaikenn Technologies

On Tue, Dec 1, 2015 at 1:29 AM, Khem Raj <raj.khem at gmail.com> wrote:

>
> On Nov 27, 2015 5:48 AM, "Sarayu Krishna Sivanandam" <sarayu at zaikenn.com>
> wrote:
> >
> > Hi ,
> >
> > I have written a kernel module which i am currently building along with
> the yocto kernel but i want to be able to move my code to a different
> repository and be able to build it as a stand alone module.
> >
> > To do so , i will need the kernel headers to be generated from the linux
> kernel on yocto . Can you please provide me the steps to build the kernel
> headers and be able to install it outside the yocto setup.
>
> You need to look into building it as external module first. Thats totally
> between kbuild and your module build system. Once that is in place then you
> just write a new recipe for your module and inherit module class in it
> mainly doing the build and packaging from OE point. There already are many
> such recipes already in meta data
> >
> > I am using the QorIQ-SDK-V1.8 SDK .
> >
> > Thanks in advance for your help.
> > Thanks and Regards,
> > Sarayu K S
> > Tech Lead
> > Zaikenn Technologies
> >
> > --
> > _______________________________________________
> > yocto mailing list
> > yocto at yoctoproject.org
> > https://lists.yoctoproject.org/listinfo/yocto
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/yocto/attachments/20151201/3a4e0b9d/attachment.html>