Re: kselftest: failed to build with -C tool/testing/selftests when KBUILD_OUTPUT is set

[Michael Ellerman <mpe@ellerman.id.au>]

shuah <shuah@kernel.org> writes:
> On 11/27/19 9:23 AM, Cristian Marussi wrote:
>> On 27/11/2019 16:04, shuah wrote:
>>>> On 27/11/2019 03:54, Michael Ellerman wrote:
...
>>>>>
>>>>> It just hit my travis jobs when I merged up to master:
>>>>>
>>>>>     https://travis-ci.org/linuxppc/linux/jobs/617482001
>>>>>
>>>>> Shuah can we please get this reverted?
>>>>>
>>>
>>> I will take care of this. Supporting all these use-cases has been
>>> maintenance problem. Fixing one use-case breaks another. :(
...
>
> If all of the above works with kselftest-install target, I would rather
> ask for CI's to change, so we can get rid of make -C usage for install.
>
> In which case, I would rather not revert this and request CIs to start
> using kselftest-install target.
>
> I would like to see CI's use kselftest-* targets from the main makefile
> for build/run/install.

The problem is old kernels (stable branches & distro kernels) don't
support that (or it doesn't work correctly).

So then the CIs have to invoke the selftest build differently depending
on which kernel version they're building, which gets ugly for them.

cheers