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From: Richard Purdie <rpurdie@linux.intel.com>
To: Chris Larson <clarson@kergoth.com>
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Date: Mon, 29 Nov 2010 04:25:57 -0800
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Cc: "poky@yoctoproject.org" <poky@yoctoproject.org>
Subject: Re: [PATCH 1/1] curl: fix native dependency
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On Sun, 2010-11-28 at 22:53 -0700, Chris Larson wrote:
> On Sun, Nov 28, 2010 at 10:26 PM, Tian, Kevin <kevin.tian@intel.com> wrote:
> > This also confuses me a bit. When virtclass-native is expanded, EXTRA_OECONF_append
> > is simply a variable. In that case the expanded value should override the 1st assignment
> > of EXTRA_OECONF_append, and then we should get:
> >
> > EXTRA_OECONF_append = " --without-gnutls "
> >
> > and then that's what we expect.
> >
> > I guess I may still overlook something here, and really appreciate your explanation
> > on the whole flow which is helpful. :-)
> 
> No, EXTRA_OECONF_append is never a variable.  _append/_prepend are
> operations, not part of the name.  The value gets set aside in a list
> of appends for that variable.  One _append cannot override/replace
> another on the same variable, its always cumulative.

Right.

Interestingly though, if I add this to curl*.bb:

FOO = "A"
FOO_append = "B"
FOO_append_virtclass-native = "C"

and then "bitbake curl-native -e | grep FOO" (he recipe has a
BBCLASSEXTEND native) what should I see?

I see FOO = "AB" which is not what I thought it would do...

Cheers,

Richard