[OE-core] How to put a correct dependency with regards to gcc?

[Richard Purdie]

On Tue, 2015-09-22 at 11:03 +0000, Reshetova, Elena wrote:
> > The idea is quite simple. Rather than having a copy of the gcc source for 
> > each recipe variant 
> > (-cross-initial, -cross, -crosssdk-initial, -crosssdk, -cross-canadian etc.) 
> > we have a single copy of the source.
> 
> >We tried an older shared stamp scheme which was fragile and prone to weird 
> >failures.  Instead we created the gcc-source recipe which is responsible for 
> >the fetch/unpack/patch/preconfigure and then each recipe can work off the 
> >shared source (and has >a dependency on gcc-source).
> 
> Thank you Richard for explaining this! It helps greatly!
> 
> >For Elena's use case, I therefore think it might be better to analyse the 
> >shared source once and not in the case of each recipe (e.g. if SRC_URI is 
> >empty).
> 
> I am really not sure how to do it apart from hardcoding a check inside the 
> class that if the recipe happens to be gcc related, run the analysis only once 
> for gcc-source and do not run it for other related packages.
> My task is currently run for every recipe uniformly and it would be not that 
> elegant to have this hardcoding part. Is there a better way of handling it?

You could test if SRC_URI is empty in your code?

Then all we'd need to do is ensure that SRC_URI was empty for the gcc
recipes except for gcc-source?

Cheers,

Richard