[poky] RFC/RFT Checksums as part of stamp files

[Tian, Kevin]

>From: Tian, Kevin
>Sent: Friday, January 07, 2011 7:23 PM
>
>>From: Richard Purdie [mailto:richard.purdie at linuxfoundation.org]
>>Sent: Friday, January 07, 2011 7:09 PM
>>
>>On Fri, 2011-01-07 at 12:49 +0800, Tian, Kevin wrote:
>>> >I'm also aware that this idea isn't going to be universally liked,
>>> >particularly I can guess that Koen is going to have concerns about this
>>> >and Angstrom since the lack of PR bumps means package feeds could start
>>> >to suffer.
>>>
>>> worthy of a config option? We may need see from real use whether this will
>>> trigger many unnecessary rebuilds and how much impact to people's daily
>>> work. Basically the incremental builds will be much more heavier than before,
>>> though this in concept is more correct...
>>
>>They are potentially heavier, yes.
>>
>>With this and other factors in mind, I've merged a new signature
>>generator class into poky with this as the only added feature. Now with
>>poky's master branch you can add:
>>
>>BB_SIGNATURE_HANDLER = "basichash"
>>
>>to local.conf to enable this functionality (the default is "basic").
>>
>>At some point we are likely to decide to change the default in
>>bitbake.conf but this makes it easier for people to test.
>>
>>For reference, my test builds completed successfully.
>>
>
>my build finishes successfully too. I will manually bump PR to test its chain
>rebuild effect for some gut-feeling. :-)
>

I tried to bump PR for m4-native, and it's effectively rebuilt from task 743 of
1625 with lots of native recipes rebuilt accordingly, as expected.

Thanks
Kevin