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Kbuild: Use dtc's -d (dependency) option 

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>
This commit is contained in:
Stephen Warren 2012-01-09 11:00:32 -07:00 committed by Mark Salter
parent dcd6c92267
commit 62e37ca78b
1 changed files with 1 additions and 1 deletions
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2
arch/c6x/boot/Makefile
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@ -13,7 +13,7 @@ obj-y += linked_dtb.o
endif
$(obj)/%.dtb: $(src)/dts/%.dts FORCE
$(call cmd,dtc)
$(call if_changed_dep,dtc)
quiet_cmd_cp = CP $< $@$2
cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)