Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Subject: Re: [PATCH v1] kbuild: fix sub directory output build of kselftests
To:     Masahiro Yamada <masahiroy@kernel.org>
Cc:     Muhammad Usama Anjum <usama.anjum@collabora.com>,
        Michal Marek <michal.lkml@markovi.net>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Kieran Bingham <kbingham@kernel.org>, kernel@collabora.com,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-kselftest@vger.kernel.org,
        Shuah Khan <skhan@linuxfoundation.org>
References: <20220627070214.432390-1-usama.anjum@collabora.com>
 <15532d64-6744-c8a5-184b-18358211d345@linuxfoundation.org>
 <CAK7LNARxSFSQgmrZe2CXj+V153kymBVyGkXwOPWLNoybQ8+bfg@mail.gmail.com>
From:   Shuah Khan <skhan@linuxfoundation.org>
Message-ID: <04f168f8-0369-f0f6-8eab-9d384aced2c8@linuxfoundation.org>
Date:   Mon, 27 Jun 2022 13:51:06 -0600
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.8.1
MIME-Version: 1.0
In-Reply-To: <CAK7LNARxSFSQgmrZe2CXj+V153kymBVyGkXwOPWLNoybQ8+bfg@mail.gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 6/27/22 11:45 AM, Masahiro Yamada wrote:
> On Tue, Jun 28, 2022 at 1:54 AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>>
>> On 6/27/22 1:02 AM, Muhammad Usama Anjum wrote:
>>> Build of kselftests fail if kernel's top most Makefile is used for
>>> running or building kselftests with separate output directory which is
>>> sub-directory. srctree is set to .. erroneously.
>>>
>>> make kselftest-all O=/linux_mainline/build
>>> Makefile:1080: ../scripts/Makefile.extrawarn: No such file or directory
>>>
>>> make kselftest-all O=build
>>> Makefile:1080: ../scripts/Makefile.extrawarn: No such file or directory
>>>
>>> Fix this by comparing abs_srctree with CURDIR instead of abs_objtree.
>>> CURDIR changes based on from where the command has been run and it sets
>>> the srctree correctly.
>>>
>>> Fixes: 25b146c5b8cee("kbuild: allow Kbuild to start from any directory")
>>> Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
>>> ---
>>> Changes in V2:
>>> - Correct the bugfix instead of workaround
>>>
>>> V1: https://lore.kernel.org/lkml/20220223191016.1658728-1-usama.anjum@collabora.com/
>>> ---
>>>    Makefile | 4 ++--
>>>    1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/Makefile b/Makefile
>>> index e66358b64ede..4090d7afcda4 100644
>>> --- a/Makefile
>>> +++ b/Makefile
>>> @@ -238,12 +238,12 @@ ifeq ($(need-sub-make),)
>>>    # so that IDEs/editors are able to understand relative filenames.
>>>    MAKEFLAGS += --no-print-directory
>>>
>>> -ifeq ($(abs_srctree),$(abs_objtree))
>>> +ifeq ($(abs_srctree),$(CURDIR))
>>>            # building in the source tree
>>>            srctree := .
>>>        building_out_of_srctree :=
>>>    else
>>> -        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
>>> +        ifeq ($(abs_srctree)/,$(dir $(CURDIR)))
>>>                    # building in a subdirectory of the source tree
>>>                    srctree := ..
>>>            else
>>>
>>
>> Please resend cc'ing linux-kselftest
>>
>> thanks,
>> -- Shuah
> 
> 
> Please do not send this any more.
> This part is good as is.
> 

+ linux-kselftest@vger.kernel.org

The reason I suggested resending cc'ing linux-kselftest is because
this fixes a kselftest problem.

I am assuming this patch will go through kbuild

Acked-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah