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build: separate preprocessing from DTB compilation

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This is a small change to separate preprocessing of device tree sources
into their own build step as opposed to combining them. The impact of
this is more on separation of concerns than anything tangible, but it's
helpful to avoid doing more than necessary in a build rule.

Change-Id: I770291bd9d9f627c93e82556a40f753bf27eef93
Signed-off-by: Chris Kay <chris.kay@arm.com>
This commit is contained in:
Chris Kay 2024-03-08 16:26:53 +00:00
parent 758ccb802d
commit 7b45352669
1 changed files with 4 additions and 2 deletions
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6
make_helpers/build_macros.mk
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@ -644,12 +644,14 @@ $(eval DTSDEP := $(patsubst %.dtb,%.o.d,$(DOBJ)))
# Dependencies of the DT compilation on its pre-compiled DTS
$(eval DTBDEP := $(patsubst %.dtb,%.d,$(DOBJ)))
$(DOBJ): $(2) $(filter-out %.d,$(MAKEFILE_LIST)) | fdt_dirs
$(DPRE): $(2) | fdt_dirs
$${ECHO} " CPP $$<"
$(eval DTBS := $(addprefix $(1)/,$(call SOURCES_TO_DTBS,$(2))))
$$(Q)$($(ARCH)-cpp) -E $$(TF_CFLAGS_$(ARCH)) $$(DTC_CPPFLAGS) -MT $(DTBS) -MMD -MF $(DTSDEP) -o $(DPRE) $$<
$(DOBJ): $(DPRE) $(filter-out %.d,$(MAKEFILE_LIST)) | fdt_dirs
$${ECHO} " DTC $$<"
$$(Q)$($(ARCH)-dtc) $$(DTC_FLAGS) -d $(DTBDEP) -o $$@ $(DPRE)
$$(Q)$($(ARCH)-dtc) $$(DTC_FLAGS) -d $(DTBDEP) -o $$@ $$<
-include $(DTBDEP)
-include $(DTSDEP)