[bitbake-devel] still confused about _append and OVERRIDES and = and +=, argh

[Robert P. J. Day]

On Tue, 1 Jan 2013, Chris Larson wrote:

>
>
> On Tue, Jan 1, 2013 at 7:12 AM, Robert P. J. Day <rpjday at crashcourse.ca> wrote:
>         again, so far, so good -- the second override superseded the first,
>       correct?
>
>               test 4:
>
>       BLAH = "A"
>       BLAH_rday = "B"
>       BLAH_rday_append = "C"
>
>       $ bitbake-env BLAH
>       BLAH="B"
>       $
>
>          ?????  that confuses me.  according to section 2.2.1 in bitbake
>       manual (very first example): 
>
>
>       OVERRIDES = "foo"
>
>       A_foo_append = "X"
>
>       "In this case, X is unconditionally appended to the variable A_foo.
>       Since foo is an override, A_foo would then replace A."
>
>       according to that, i should expect BLAH to have the value "BC", no?
>
>
> Yeah, as far as I'm aware that's what should have happened, but as
> you noticed, this form is extremely unusual.

  now that i look at it, i don't think i know of *any* usage of the
form VAR_<override>_append.  is it actually used anywhere?  if not,
i'm just going to omit talking about it in future classes.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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