[yocto] undocumented MACHINE_FEATURES, and what makes something a MACHINE feature?

[Burton, Ross]

On 15 November 2013 10:49, Robert P. J. Day <rpjday at crashcourse.ca> wrote:
>   as you can see, the only tests for 'wifi' involve either
> DISTRO_FEATURES or COMBINED_FEATURES, *not* MACHINE_FEATURES
> individually. under the circumstances, then, can 'wifi' be considered
> a legitimate MACHINE feature if it's never being tested in that
> context? (the same can be said for 'bluetooth', by the way.)

COMBINED_FEATURES is a union of MACHINE_ and DISTRO_FEATURES, so it
does make sense for them to be listed as MACHINE_FEATURES as otherwise
they can't be combined...  No point building wifi in the distro if the
machine doesn't support it, and the machine supporting wifi isn't a
reason to enable it in the distro.

Ross