[PATCHv2] Add --no-hard-links option to localedef (Bug 23923)

[Carlos O'Donell]

On 11/26/18 2:26 PM, Florian Weimer wrote:
> * Carlos O'Donell:
> 
>> On 11/26/18 11:58 AM, Joseph Myers wrote:
>>> On Mon, 26 Nov 2018, Carlos O'Donell wrote:
>>>
>>>> If the downstream distro wants to post-process the hardlinks then
>>>> the time spent in localedef looking up sibling directories and
>>>> processing hardlinks is wasted effort.
>>>
>>> Do you have figures for the time involved?
>>
>> On a fast SSD the -j1 locale build and install of SUPPORTED locales
>> is 3% faster, or for me roughly ~10s on a:
>> "make localedata/install-locale-files DESTDIR=..." iteration.
>>
>> The option itself ensures that no hard links are present and that may
>> make the logic of the post-install hardlink creation phase simpler.
>> So there is more than just performance to consider.
> 
> The real performance win comes from the ability to use parallel make and
> still get fully deterministic results.

If you are OK with v2 then I'll give it a few days for others to comment
and then commit. In v2 I switch the 'make localedata/install-locale-files'
to use --no-hard-links as the default distribution way to install the
files deterministically regardless of build paralleism.

-- 
Cheers,
Carlos.