Re: [PATCH V5 4/5] kbuild: Add support to build overlays (%.dtbo)

[Frank Rowand]

On 1/20/21 10:13 PM, Viresh Kumar wrote:
> On 21-01-21, 11:49, David Gibson wrote:
>> If you're using overlays, you probably need the -@ flag, for both the
>> base file and the overlays, which AFAICT is not already the case.
> 
> I think the idea was to do that in the platform specific Makefiles,
> unless I have misunderstood that from earlier discussions. So a
> platform may want to do that per-file or just enable it for the entire
> platform.
> 

Yes, that is correct.  For drivers/of/unitest-data/Makefile, we have
entries like:

DTC_FLAGS_overlay += -@
DTC_FLAGS_overlay_bad_phandle += -@
DTC_FLAGS_overlay_bad_symbol += -@
DTC_FLAGS_overlay_base += -@
DTC_FLAGS_testcases += -@

-Frank