[yocto] LINUX_VERSION issue in recipe

[Damien LEFEVRE]

 OK, thanks for the clarification guys!

I think I'll just overwrite the keymaps recipe script to get rid of the
kernel version and continue from here =)

Cheers,
-Damien


On Sat, Apr 28, 2018 at 5:20 AM, Bruce Ashfield <
bruce.ashfield at windriver.com> wrote:

>
>
> On 4/27/2018 5:34 PM, Andre McCurdy wrote:
>
>> On Fri, Apr 27, 2018 at 3:44 AM, Damien LEFEVRE <lefevre.da at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> This must be a stupid basic question. I have the following recipe append:
>>>
>>> keymaps_1.0.bbappend
>>> ------------------------------------------------------------
>>> -----------------
>>> FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
>>> SRC_URI_append = " file://keymaps.service \
>>>                     file://keymap.sh \
>>> "
>>>
>>> do_install_append() {
>>>      install -d ${D}${sysconfdir}
>>>      ln -sf /usr/share/keymaps/i386/qwerty/fi.map.gz
>>> ${D}${sysconfdir}/keymap-${LINUX_VERSION}.map.gz
>>>
>>>      install -d ${D}${systemd_system_unitdir}
>>>      install -m 0644 ${WORKDIR}/keymaps.service
>>> ${D}${systemd_system_unitdir}
>>> }
>>>
>>> FILES_${PN} += " ${sysconfdir}/* \
>>>                   ${systemd_system_unitdir}/* \
>>> "
>>>
>>> inherit systemd
>>> SYSTEMD_SERVICE_${PN} = "${PN}.service"
>>> ------------------------------------------------------------
>>> -----------------
>>>
>>> The LINUX_VERSION is not expanded and the final symlink name becomes
>>> /etc/keymap-.map.gz.
>>>
>>> What's correct way to get the linux version in the recipe files?
>>>
>>
>> In general, there isn't a correct way to do that. The LINUX_VERSION
>> variable is defined within the kernel recipe and other recipes won't
>> have access to it.
>>
>> A core concept in OE is that recipes build independently of each
>> other. In this case, since the keymaps recipe has no direct dependency
>> on the kernel, you should not expect the keymaps recipe to be rebuilt
>> (or affected in any way) when the kernel or kernel version changes.
>>
>
> Yep. Unless you inherit the kernel build classes there's no
> easy way to do this. But if the kernel classes are inherited,
> then some of the variables like KERNEL_VERSION become available
> to use .. but of course, you've just tightly coupled things to
> the kernel.
>
> Cheers,
>
> Bruce
>
>
>
>> The keymaps init script ( meta/recipes-bsp/keymaps/files/keymap.sh )
>> detects the kernel version dynamically at runtime. If you need a
>> kernel version specific symlink in your target rootfs, maybe you could
>> create it at runtime from your keymaps service file?
>>
>>


-- 
___________________________

        LEFEVRE Damien
        lefevre.da at gmail.com
        http://www.lfdm.net
  ___________________________
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