[PATCH 1/2] kbuild: add dtc as dependency on .dtb files

[Rasmus Villemoes]

[Linux commit b8fc5b2157b1]

If dtc is rebuilt, we should rebuild .dtb files with the new dtc.

[Import notes: Back then there was no .dtbo rule in Linux's
Makefile.lib, but the current .dtbo rules in Linux also have the
$(DTC) dependency, so also add it to our .dtbo rule.]

Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
---
 scripts/Makefile.lib | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 7b27224b5d..651d700369 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -331,7 +331,7 @@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 		; \
 	sed "s:$(pre-tmp):$(<):" $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
-$(obj)/%.dtb: $(src)/%.dts FORCE
+$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
 	$(call if_changed_dep,dtc)
 
 pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp)
@@ -351,7 +351,7 @@ cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
-$(obj)/%.dtbo: $(src)/%.dts FORCE
+$(obj)/%.dtbo: $(src)/%.dts $(DTC) FORCE
 	$(call if_changed_dep,dtco)
 
 # Fonts
-- 
2.37.2