[OE-core] ALLOW_EMPTY versus ALLOW_EMPTY_${PN}? a couple clarifications

[Marcin Juszkiewicz]

W dniu 06.07.2012 15:10, Robert P. J. Day pisze:
> 
>   just trying to clarify the gory details of the ALLOW_EMPTY setting.
> first, across several .bb files, there is a mixture of these two:
> 
> ALLOW_EMPTY = "1"
> ALLOW_EMPTY_${PN} = "1"
> 
>   what's the difference?  what does the first one represent if you're
> not specific?  does that cover *all* generated packages?

Yes, first means "all packages may be empty"

>   next, i assume there's no real value to hardcoding the package name,
> as in:
> 
> ./meta/recipes-multimedia/alsa/alsa-utils_1.0.25.bb:ALLOW_EMPTY_alsa-utils = "1"
> 
> (i assume the above could have just used the standard "_${PN}",
> right?)

${PN} should be in this case.