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kbuild: create a list of all built DTB files
It is useful to have a list of all *.dtb and *.dtbo files generated from the current build. With this commit, 'make dtbs' creates arch/*/boot/dts/dtbs-list, which lists the dtb(o) files created in the current build. It maintains the order of the dtb-y additions in Makefiles although the order is not important for DTBs. It is a (good) side effect through the reuse of the modules.order rule. Please note this list only includes the files directly added to dtb-y. For example, consider this case: foo-dtbs := foo_base.dtb foo_overlay.dtbo dtb-y := foo.dtb In this example, the list will include foo.dtb, but not foo_base.dtb or foo_overlay.dtbo. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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.gitignore
vendored
1
.gitignore
vendored
@ -52,6 +52,7 @@
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*.xz
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*.zst
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Module.symvers
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dtbs-list
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modules.order
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#
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4
Makefile
4
Makefile
@ -1393,7 +1393,7 @@ ifneq ($(dtstree),)
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PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
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dtbs: dtbs_prepare
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$(Q)$(MAKE) $(build)=$(dtstree)
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$(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1
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# include/config/kernel.release is actually needed when installing DTBs because
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# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
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@ -1932,7 +1932,7 @@ clean: $(clean-dirs)
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-o -name '*.ko.*' \
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-o -name '*.dtb' -o -name '*.dtbo' \
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-o -name '*.dtb.S' -o -name '*.dtbo.S' \
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-o -name '*.dt.yaml' \
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-o -name '*.dt.yaml' -o -name 'dtbs-list' \
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-o -name '*.dwo' -o -name '*.lst' \
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-o -name '*.su' -o -name '*.mod' \
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-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
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@ -71,6 +71,7 @@ endif
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# subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...)
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subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y)))
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subdir-modorder := $(sort $(filter %/modules.order, $(obj-m)))
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subdir-dtbslist := $(sort $(filter %/dtbs-list, $(dtb-y)))
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targets-for-builtin := $(extra-y)
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@ -388,6 +389,7 @@ $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
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# To build objects in subdirs, we need to descend into the directories
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$(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
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$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
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$(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ;
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#
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# Rule to compile a set of .o files into one .a file (without symbol table)
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@ -404,19 +406,21 @@ $(obj)/built-in.a: $(real-obj-y) FORCE
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$(call if_changed,ar_builtin)
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#
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# Rule to create modules.order file
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# Rule to create modules.order and dtbs-list
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#
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# Create commands to either record .ko file or cat modules.order from
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# a subdirectory
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# Add $(obj-m) as the prerequisite to avoid updating the timestamp of
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# modules.order unless contained modules are updated.
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# This is a list of build artifacts (module or dtb) from the current Makefile
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# and its sub-directories. The timestamp should be updated when any of the
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# member files.
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cmd_modules_order = { $(foreach m, $(real-prereqs), \
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$(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \
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cmd_gen_order = { $(foreach m, $(real-prereqs), \
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$(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \
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> $@
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$(obj)/modules.order: $(obj-m) FORCE
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$(call if_changed,modules_order)
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$(call if_changed,gen_order)
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$(obj)/dtbs-list: $(dtb-y) FORCE
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$(call if_changed,gen_order)
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#
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# Rule to compile a set of .o files into one .a file (with symbol table)
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@ -45,6 +45,11 @@ else
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obj-y := $(filter-out %/, $(obj-y))
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endif
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ifdef need-dtbslist
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dtb-y += $(addsuffix /dtbs-list, $(subdir-ym))
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always-y += dtbs-list
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endif
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# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
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suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
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# List composite targets that are constructed by combining other targets
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@ -99,6 +104,7 @@ lib-y := $(addprefix $(obj)/,$(lib-y))
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real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
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real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
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multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
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dtb-y := $(addprefix $(obj)/, $(dtb-y))
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multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y))
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real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y))
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subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
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