[yocto] Timestamp error between zImage & uname-a [ Yocto-2.6.1 + Qemux86 ]

[AshishKumar Mishra]

Thanks Ralph for informative reply .
Will check once again after deleting the file you suggested .

Ashish


On Mon, May 13, 2019, 7:05 PM Ralph Siemsen <ralph.siemsen at linaro.org>
wrote:

> Hi Ashish,
>
> On Mon, May 13, 2019 at 5:57 AM AshishKumar Mishra <
> ashish.emailaddress at gmail.com> wrote:
>
>> So , time shown by "uname -a" is retains older value even though
>> i had compiled the linux multiple times .
>>
>
> This is normal behaviour, even when building the kernel directly (eg. not
> using Yocto). It is a bit surprising at first, but it all comes down to
> dependencies in the Makefile for the kernel.
>
> The version string displayed by "uname -a" comes from init/version.c in
> the kernel source tree. Specifically the symbol UTS_VERSION, which is
> defined in include/generated/compile.h. This file is produced when you
> first build, and remains thereafter, unless you do "make clean" or
> equivalent.
>
> Currently , only way i am able to bypass this behavior is to do bitbake -c
>> cleanall linux-yocto
>> before every compilation.
>>
>
> You can delete the include/generated/compile.h file in your kernel build
> directory. Upon rebuild of kernel, the file will be re-created with the
> current date/time.
>
> Regards
> Ralph
>
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