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| author |   Masahiro Yamada <masahiroy@kernel.org> | 2021-08-13 15:30:04 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2021-09-03 08:17:19 +0900 |
| commit | 6796e80409b9031458e33dc39a3ac8aa3b93855b (patch) | |
| tree | a41568b3062e43015f3a01a58f4cbea33a36be24 /scripts/Kbuild.include | |
| parent | x86/build/vdso: fix missing FORCE for *.so build rule (diff) | |
| download | linux-dev-6796e80409b9031458e33dc39a3ac8aa3b93855b.tar.xz linux-dev-6796e80409b9031458e33dc39a3ac8aa3b93855b.zip | |
kbuild: macrofy the condition of if_changed and friends
Add a new macro that expands into $(newer-prereqs)$(cmd-check).
It makes it easier to add common code for if_changed, if_changed_dep,
and if_changed_rule.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/Kbuild.include')
| -rw-r--r-- | scripts/Kbuild.include | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index f247e691562d..c3c975a92318 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -130,13 +130,15 @@ make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))) # PHONY targets skipped in both cases. newer-prereqs = $(filter-out $(PHONY),$?) +if-changed-cond = $(newer-prereqs)$(cmd-check) + # Execute command if command has changed or prerequisite(s) are updated. -if_changed = $(if $(newer-prereqs)$(cmd-check), \ +if_changed = $(if $(if-changed-cond), \ $(cmd); \ printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) # Execute the command and also postprocess generated .d dependencies file. -if_changed_dep = $(if $(newer-prereqs)$(cmd-check),$(cmd_and_fixdep),@:) +if_changed_dep = $(if $(if-changed-cond),$(cmd_and_fixdep),@:) cmd_and_fixdep = \ $(cmd); \ @@ -146,7 +148,7 @@ cmd_and_fixdep = \ # Usage: $(call if_changed_rule,foo) # Will check if $(cmd_foo) or any of the prerequisites changed, # and if so will execute $(rule_foo). -if_changed_rule = $(if $(newer-prereqs)$(cmd-check),$(rule_$(1)),@:) +if_changed_rule = $(if $(if-changed-cond),$(rule_$(1)),@:) ### # why - tell why a target got built |