Adding the -@ switch to dtc results in the binary devicetrees containing a list of symbolic references and their paths. This is necessary to apply device tree overlays e.g. on Raspberry Pi as described on https://www.raspberrypi.org/documentation/configuration/device-tree.md. Obviously the downside of this change is an increas of the size of the generated dtbs, for an arm out-of-tree build (multi_v7_defconfig): $ du -s arch/arm/boot/dts* 101380 arch/arm/boot/dts-pre 114308 arch/arm/boot/dts-post so this is in average an increase of 12.8% in size. Signed-off-by: Uwe Kleine-König <uwe@xxxxxxxxxxxxxxxxx> --- scripts/Makefile.lib | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 213677a5ed33..0683a5808f7f 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -319,7 +319,7 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE quiet_cmd_dtc = DTC $@ cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ - $(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \ + $(DTC) -@ -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \ $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ -d $(depfile).dtc.tmp $(dtc-tmp) ; \ cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) -- 2.29.2
