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https://github.com/torvalds/linux
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62e37ca78b
This hooks dtc into Kbuild's dependency system. Thus, for example, "make dtbs" will rebuild tegra-harmony.dtb if only tegra20.dtsi has changed yet tegra-harmony.dts has not. The previous lack of this feature recently caused me to have very confusing "git bisect" results. For ARM, it's obvious what to add to $(targets). I'm not familiar enough with other architectures to know what to add there. Powerpc appears to already add various .dtb files into $(targets), but the other archs may need something added to $(targets) to work. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Mark Salter <msalter@redhat.com>
31 lines
586 B
Makefile
31 lines
586 B
Makefile
#
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# Makefile for bootable kernel images
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#
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OBJCOPYFLAGS_vmlinux.bin := -O binary
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$(obj)/vmlinux.bin: vmlinux FORCE
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$(call if_changed,objcopy)
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DTC_FLAGS ?= -p 1024
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ifneq ($(DTB),)
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obj-y += linked_dtb.o
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endif
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$(obj)/%.dtb: $(src)/dts/%.dts FORCE
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$(call if_changed_dep,dtc)
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quiet_cmd_cp = CP $< $@$2
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cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)
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# Generate builtin.dtb from $(DTB).dtb
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$(obj)/builtin.dtb: $(obj)/$(DTB).dtb
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$(call if_changed,cp)
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$(obj)/linked_dtb.o: $(obj)/builtin.dtb
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$(obj)/dtbImage.%: vmlinux
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$(call if_changed,objcopy)
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clean-files := $(obj)/*.dtb
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