Re: [PATCH v2 1/2] scripts: Add a recorduidiv program

[Michal Marek <mmarek@suse.cz>]

On 2015-11-30 16:40, Michal Marek wrote:
> On 2015-11-30 16:32, Russell King - ARM Linux wrote:
>> On Mon, Nov 30, 2015 at 04:11:16PM +0100, Michal Marek wrote:
>>> On 2015-11-26 00:47, Russell King - ARM Linux wrote:
>>>> Do we have any resolution on these programs which modify the object
>>>> files in-place, rather than breaking any hard-links which may be
>>>> present (eg, as a result of using ccache in hard-link mode) ?
>>>
>>> Good point, but I do not think anybody is using CCACHE_HARDLINK with the
>>> kernel.
>>
>> That's wrong then, because I've been using it for a very long time with
>> my nightly builds. :)  Therefore, there is somebody!
> 
> OK.

So, both recordmcount and the new recordudiv program are idempotent.
They check if the to-be-added section is already present and do nothing.
So the result is correct even with CCACHE_HARDLINK, just the
intermediate file might be incorrect. If this still is considered an
issue, I suggest clearing CCACHE_HARDLINK when using any of these
postprocessors, so as not to penalize other use cases.

The perl recordmcount does not modify the file in place.

Michal