[yocto] How to combine BBCLASSEXTEND and variable export

[Paul Eggleton]

On Thursday 26 September 2013 12:38:13 Hans Beckérus wrote:
> On Thu, Sep 26, 2013 at 12:13 PM, Paul Eggleton
> <paul.eggleton at linux.intel.com> wrote:
> > On Wednesday 25 September 2013 17:39:04 Hans Beckérus wrote:
> >> Hi. I have a recipe that use BBCLASSEXTEND to extend native. For the
> >> normal/base version I wish to set/export an environment variable to be
> >> picked up by configure.
> >> But I do not wish this variable to be set by the native package. How
> >> would I accomplish that? It was ok before when I had a package-native
> >> recipe but since that is obsolete in favor for BBCLASSEXTEND I wish to
> >> remove it. I think I covered all the other caveats like DEPEND and
> >> PACKAGE/FILES. But this one is not as straight forward, or is it?
> > 
> > If I'm understanding the requirements correctly think you could do
> > something like:
> > 
> > do_configure_prepend_class_target() {
> > 
> >         export VARIABLE=value
> > 
> > }
> 
> Yes, I believe I tried that, but then the export does not persist over
> do_configure(), does it?
> It is only alive during the scope of do_configure_prepend() or?

The _prepend is just prepended to the function before running it, so it will 
be applied for the entire function. If you have a look at 
temp/run.do_configure.* in the workdir for the recipe, you'll be able to verify 
this.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre