From: Masahiro Yamada <masahiroy@kernel.org>
Date: Fri, 13 Aug 2021 06:30:04 +0000 (+0900)
Subject: kbuild: macrofy the condition of if_changed and friends
X-Git-Tag: microblaze-v5.16~99^2~23
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=6796e80409b9031458e33dc39a3ac8aa3b93855b;p=linux-2.6-microblaze.git

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>
---

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