[OE-core] Circular dependency of do_populate_sysroot

[Stefan Herbrechtsmeier]

Am 08.04.19 um 08:55 schrieb richard.purdie at linuxfoundation.org:
> On Mon, 2019-04-08 at 07:43 +0200, Stefan Herbrechtsmeier wrote:
>> Am 07.04.2019 23:35 schrieb richard.purdie at linuxfoundation.org:
>>> You're saying A runtime depends on B and B runtime depends on A.
>>
>> Yes, only the run time depends on each other. This means the
>> dependency doesn't exist during a native build of a or b.
> 
> In which case this is easy, simply set:
> 
> RDEPENDS_${PN}_class-native = ""
> 
> By default the system assumes that native packages have the same
> dependencies as target.

I mean that the build of a-native and b-native don't need b-native or 
a-native to populate the sysroot directory but a-native and b-native 
require b-native or a-native at run time.

I have take a deeper look into the problem and understand that this 
isn't supported by oe because of the native sysroot implementation. The 
implementation evaluates the rdepends during do_populate_sysroot task 
and therefore need to finish all other do_populate_sysroot task before.

It would be nice if the native sysroot uses packages and supports the 
same features as the cross packages which handle dependencies independently.

Best regards
   Stefan