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

On 1/20/21 10:13 PM, Viresh Kumar wrote:

On 21-01-21, 11:49, David Gibson wrote:

quoted

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