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kbuild: split device tree build rules into scripts/Makefile.dtbs

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scripts/Makefile.lib is included not only from scripts/Makefile.build
but also from scripts/Makefile.{modfinal,package,vmlinux,vmlinux_o},
where DT build rules are not required.

Split the DT build rules out to scripts/Makefile.dtbs, and include it
only when necessary.

While I was here, I added $(DT_TMP_SCHEMA) as a prerequisite of
$(multi-dtb-y).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Masahiro Yamada
2024-09-05 08:47:38 +09:00
parent fc41a0a749
commit e7e2941300
5 changed files with 153 additions and 135 deletions
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25
scripts/Makefile.build
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@@ -57,7 +57,6 @@ endif
# subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...)
subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y)))
subdir-modorder := $(sort $(filter %/modules.order, $(obj-m)))
subdir-dtbslist := $(sort $(filter %/dtbs-list, $(dtb-y)))
targets-for-builtin := $(extra-y)
@@ -349,7 +348,7 @@ $(obj)/%.o: $(obj)/%.S FORCE
targets += $(filter-out $(subdir-builtin), $(real-obj-y))
targets += $(filter-out $(subdir-modorder), $(real-obj-m))
targets += $(real-dtb-y) $(lib-y) $(always-y)
targets += $(lib-y) $(always-y)
# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
@@ -375,7 +374,6 @@ $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
# To build objects in subdirs, we need to descend into the directories
$(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
$(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ;
#
# Rule to compile a set of .o files into one .a file (without symbol table)
@@ -391,12 +389,8 @@ quiet_cmd_ar_builtin = AR $@
$(obj)/built-in.a: $(real-obj-y) FORCE
$(call if_changed,ar_builtin)
#
# Rule to create modules.order and dtbs-list
#
# This is a list of build artifacts (module or dtb) from the current Makefile
# and its sub-directories. The timestamp should be updated when any of the
# member files.
# This is a list of build artifacts from the current Makefile and its
# sub-directories. The timestamp should be updated when any of the member files.
cmd_gen_order = { $(foreach m, $(real-prereqs), \
$(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \
@@ -405,9 +399,6 @@ cmd_gen_order = { $(foreach m, $(real-prereqs), \
$(obj)/modules.order: $(obj-m) FORCE
$(call if_changed,gen_order)
$(obj)/dtbs-list: $(dtb-y) FORCE
$(call if_changed,gen_order)
#
# Rule to compile a set of .o files into one .a file (with symbol table)
#
@@ -436,11 +427,7 @@ intermediate_targets = $(foreach sfx, $(2), \
$(patsubst %$(strip $(1)),%$(sfx), \
$(filter %$(strip $(1)), $(targets))))
# %.asn1.o <- %.asn1.[ch] <- %.asn1
# %.dtb.o <- %.dtb.S <- %.dtb <- %.dts
# %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtso
targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \
$(call intermediate_targets, .dtb.o, .dtb.S .dtb) \
$(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo)
targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h)
# Include additional build rules when necessary
# ---------------------------------------------------------------------------
@@ -457,6 +444,10 @@ ifneq ($(userprogs),)
include $(srctree)/scripts/Makefile.userprogs
endif
ifneq ($(need-dtbslist)$(dtb-y)$(dtb-)$(filter %.dtb %.dtb.o %.dtbo.o,$(targets)),)
include $(srctree)/scripts/Makefile.dtbs
endif
# Build
# ---------------------------------------------------------------------------