[yocto] Error during adding a new recipe.

[Andre McCurdy]

On Thu, Jul 21, 2016 at 8:20 PM, Khem Raj <raj.khem at gmail.com> wrote:
>
>> On Jul 21, 2016, at 6:45 PM, Paul Eggleton <paul.eggleton at linux.intel.com> wrote:
>>
>> On Thu, 21 Jul 2016 18:35:25 Khem Raj wrote:
>>> On Thu, Jul 21, 2016 at 6:32 PM, Paul Eggleton
>>>
>>> <paul.eggleton at linux.intel.com> wrote:
>>>> On Thu, 21 Jul 2016 18:22:32 Khem Raj wrote:
>>>>>> On Jul 21, 2016, at 5:20 PM, Vijayakumar Badiger
>>>>>> <vijayakumarmb at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>> The sync driver is already ported in the kernel.  I just need to get
>>>>>> this
>>>>>> compilation error fixed. I tried adding below change to kernel bb file
>>>>>> but still I get that same error.
>>>>>>
>>>>>> PACKAGES =+ "kernel-headers"
>>>>>> FILES_kernel-headers = "${KDIR}/usr/include”
>>>>>
>>>>> there is a different recipe for headers linux-libc-headers that also
>>>>> needs
>>>>> to be patched and then hopefully kernel build system is exporting this
>>>>> header for userspace automatically and you will be set.
>>>>
>>>> I thought we weren't supposed to be encouraging modifying
>>>> linux-libc-headers - especially as this isn't for the libc - it's for
>>>> other userspace code...?
>>>
>>> Yes thats correct thats why
>>> I am not asking for submitting this patch upstream.
>>
>> Sure, but this question comes up a lot. We ought to be telling people the
>> correct mechanism for introducing extra headers such as this if it isn't to
>> modify linux-libc-headers.
>
> Thats possible for external kernel modules. This is a kernel patch. There is no other elegant way
> of solving this. They could write another recipe just to stage this header. but thats equally ugly.

A new recipe isn't needed. You can add something like the following to
the existing kernel recipe:

  sysroot_stage_all_append () {
    mkdir -p ${SYSROOT_DESTDIR}/${includedir}/linux
    install -m644 ${S}/include/linux/sync.h
${SYSROOT_DESTDIR}/${includedir}/linux/
  }

and then add a dependency on the kernel to the recipe which needs the headers.


>>
>> Cheers,
>> Paul
>>
>> --
>>
>> Paul Eggleton
>> Intel Open Source Technology Centre
>
>
> --
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