linux-kernel - Re: [PATCH v2] tags: honor COMPILED_SOURCE with apart output directory

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Date:   Mon, 5 Jun 2017 15:05:06 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Robert Jarzmik <robert.jarzmik@...e.fr>
Cc:     Michal Marek <mmarek@...e.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH v2] tags: honor COMPILED_SOURCE with apart output directory

Hi Robert,


2017-05-07 0:57 GMT+09:00 Masahiro Yamada <yamada.masahiro@...ionext.com>:
> Hi Robert,
>
> 2017-05-04 15:29 GMT+09:00 Robert Jarzmik <robert.jarzmik@...e.fr>:
>> Masahiro Yamada <yamada.masahiro@...ionext.com> writes:
>>
>>> Hi Robert,
>>>
>>> 2017-04-26 5:07 GMT+09:00 Robert Jarzmik <robert.jarzmik@...e.fr>:
>>>> Masahiro Yamada <yamada.masahiro@...ionext.com> writes:
>>>>
>>>>> Hi Robert,
>>>>>> diff --git a/scripts/tags.sh b/scripts/tags.sh
>>>>>> index a2ff3388e5ea..35cb64d5211c 100755
>>>>>> --- a/scripts/tags.sh
>>>>>> +++ b/scripts/tags.sh
>>>>>> @@ -106,7 +106,8 @@ all_compiled_sources()
>>>>>>                 case "$i" in
>>>>>>                         *.[cS])
>>>>>>                                 j=${i/\.[cS]/\.o}
>>>>>> -                               if [ -e $j ]; then
>>>>>> +                               k="${j#$tree}"
>>>>>> +                               if [ -e $j -o -e "$k" ]; then
>>>>>
>>>>>
>>>>> Do we need to check both srctree and objtree?
>>>>> I think checking objtree (after $tree is ripped off) is enough.
>>>>
>>>> If I remember correctly, as this goes back a couple of monthes when I made the
>>>> tests of this patch, the srctree is checked for the case when the kernel is
>>>> compiled without O=, and objtree for the case with O=.
>>>
>>>
>>> I thought of this too, but if O= is given, objects in srctree
>>> should not be checked.
>>>
>>> For example, the kernel may be compiled for ARCH=arm with O= first,
>>> then for ARCH=x86 without O= second.
>>>
>>> If we include objects from both trees, the generated tag file
>>> will be a mixture of arm and x86.
>> That's true, but is this case worth an additional test for this case, ie. is it
>> a case anybody uses ? Given that that this tags generation never worked for out
>> of tree builds, I was thinking it wasn't worth a :
>>    [[ (-z $O -a -e $j) || (-n $O -a -e $k) ]];
>
>
> I am not saying we should do like that.
>
>
> My suggestion is even simpler.
>
> Can we do like this?
>
>
> diff --git a/scripts/tags.sh b/scripts/tags.sh
> index d661f2f..d23dcbf 100755
> --- a/scripts/tags.sh
> +++ b/scripts/tags.sh
> @@ -106,6 +106,7 @@ all_compiled_sources()
>                 case "$i" in
>                         *.[cS])
>                                 j=${i/\.[cS]/\.o}
> +                               j="${j#$tree}"
>                                 if [ -e $j ]; then
>                                         echo $i
>                                 fi
>
>


I tested the code above, and it worked fine.

Could you send v3?  Then, I will apply it soon.

Or, if you are not reluctant to do so,
may I modify your patch like above?




-- 
Best Regards
Masahiro Yamada