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

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Date:   Sun, 11 Dec 2016 22:20:37 +0100
From:   Michal Marek <mmarek@...e.com>
To:     Robert Jarzmik <robert.jarzmik@...e.fr>
Cc:     linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] tags: honor COMPILED_SOURCE with apart output directory

Dne 6.12.2016 v 12:54 Robert Jarzmik napsal(a):
> Robert Jarzmik <robert.jarzmik@...e.fr> writes:
> 
>> When the kernel is compiled with an "O=" argument, the object files are
>> not necessarily in the source tree, and more probably in another tree.
>>
>> In this situation, the current used check doesn't work, and
>> COMPILED_SOURCE tags is broken with O= builds.
>>
>> This patch fixes it by looking for object files both in source tree and
>> potential destination tree.
>>
>> Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
> 
> Hi Marek, ping about this patch ?

Sorry, I missed the patch.

>> --- a/scripts/tags.sh
>> +++ b/scripts/tags.sh
>> @@ -106,7 +106,9 @@ all_compiled_sources()
>>  		case "$i" in
>>  			*.[cS])
>>  				j=${i/\.[cS]/\.o}
>> -				if [ -e $j ]; then
>> +				k=${i/"$tree"/"$O"\/}
>> +				k=${k/\.[cS]/\.o}
>> +				if [ -e $j -o -e "$k" ]; then

Please use the KBUILD_OUTPUT variable and not O. Also, the $tree prefix
should only match at the beginning of the filename (so use something
like ${i#$tree}). Last, but not least, the .[cS] -> .o substitution only
needs to be done once. The k variable can use the value of j instead of i.

Thanks,
Michal