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-order, 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@xxxxxxxxxx>
---
.gitignore | 1 +
Makefile | 4 ++--
scripts/Makefile.build | 20 ++++++++++++--------
scripts/Makefile.lib | 6 ++++++
4 files changed, 21 insertions(+), 10 deletions(-)
diff --git a/.gitignore b/.gitignore
index 689a4fa3f547..c59dc60ba62e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,6 +52,7 @@
*.xz
*.zst
Module.symvers
+dtbs-list
modules.order
#
diff --git a/Makefile b/Makefile
index 6204a3803a90..db7f9e34a24e 100644
--- a/Makefile
+++ b/Makefile
@@ -1389,7 +1389,7 @@ ifneq ($(dtstree),)
PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
dtbs: dtbs_prepare
- $(Q)$(MAKE) $(build)=$(dtstree)
+ $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1
# include/config/kernel.release is actually needed when installing DTBs because
# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
@@ -1927,7 +1927,7 @@ clean: $(clean-dirs)
-o -name '*.ko.*' \
-o -name '*.dtb' -o -name '*.dtbo' \
-o -name '*.dtb.S' -o -name '*.dtbo.S' \
- -o -name '*.dt.yaml' \
+ -o -name '*.dt.yaml' -o -name 'dtbs-list' \
-o -name '*.dwo' -o -name '*.lst' \
-o -name '*.su' -o -name '*.mod' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 9a3063735e71..d23797dbca0f 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -71,6 +71,7 @@ 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)
@@ -387,6 +388,7 @@ $(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)
@@ -403,19 +405,21 @@ $(obj)/built-in.a: $(real-obj-y) FORCE
$(call if_changed,ar_builtin)
#
-# Rule to create modules.order file
+# Rule to create modules.order and dtbs-list
#
-# Create commands to either record .ko file or cat modules.order from
-# a subdirectory
-# Add $(obj-m) as the prerequisite to avoid updating the timestamp of
-# modules.order unless contained modules are updated.
+# 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.
-cmd_modules_order = { $(foreach m, $(real-prereqs), \
- $(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \
+cmd_gen_order = { $(foreach m, $(real-prereqs), \
+ $(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \
> $@
$(obj)/modules.order: $(obj-m) FORCE
- $(call if_changed,modules_order)
+ $(call if_changed,gen_order)
+
+$(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)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index cd5b181060f1..b35d39022a30 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -45,6 +45,11 @@ else
obj-y := $(filter-out %/, $(obj-y))
endif
+ifdef need-dtbslist
+dtb-y += $(addsuffix /dtbs-list, $(subdir-ym))
+always-y += dtbs-list
+endif
+
# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
# List composite targets that are constructed by combining other targets
@@ -99,6 +104,7 @@ lib-y := $(addprefix $(obj)/,$(lib-y))
real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
+dtb-y := $(addprefix $(obj)/, $(dtb-y))
multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y))
real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
--
2.40.1
