[oe] Bitbake task dependency stamp handling

[Koen Kooi]

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Richard Purdie schreef:
> I had some interesting thoughts regarding tasks and their timestamps.
> Bitbake's current method of dealing with timestamps walks the task
> digraph structure which only knows about a single .bb file. The result
> is if you change an earlier task, say do_patch, later tasks like
> do_compile would rerun. If you rebuild gtk, the rest of your system
> linking to gtk doesn't rebuild though.
> 
> If we move away from the digraph which isn't really needed anymore,
> taskData has the complete dependency tree available to it and the option
> of rebuilding the whole system if you recompile gtk becomes possible.
> 
> At face value this sounds really useful. I'd guess that almost every OE
> developer would find it insanely annoying in practise though?

Annoying, maybe, correct behaviour, yes. Option for local.conf?

regards,

Koen
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