path: root/scripts/Kbuild.include
diff options
authorMasahiro Yamada <yamada.masahiro@socionext.com>2019-06-23 01:07:05 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2019-07-01 10:03:40 +0900
commitc2341e2a4f58d8e27d89c5edfefdaa52547f792d (patch)
treed9663a355afa1589a97ab87c3b843442ee5edccc /scripts/Kbuild.include
parentkbuild: save $(strip ...) for calling any-prepreq (diff)
kbuild: save $(strip ...) for calling if_changed and friends
The string returned by $(filter-out ...) does not contain any leading or trailing spaces. With the previous commit, 'any-prereq' no longer contains any excessive spaces. Nor does 'cmd-check' since it expands to a $(filter-out ...) call. So, only the space that matters is the one between 'any-prereq' and 'cmd-check'. By removing it from the code, we can save $(strip ...) evaluation. This refactoring is possible because $(any-prereq)$(cmd-check) is only passed to the first argument of $(if ...), so we are only interested in whether or not it is empty. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/Kbuild.include')
1 files changed, 3 insertions, 3 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 6f9e88716ff4..222fd1d7d3ae 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -228,12 +228,12 @@ make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1))))
any-prereq = $(filter-out $(PHONY),$?)$(filter-out $(PHONY) $(wildcard $^),$^)
# Execute command if command has changed or prerequisite(s) are updated.
-if_changed = $(if $(strip $(any-prereq) $(cmd-check)), \
+if_changed = $(if $(any-prereq)$(cmd-check), \
$(cmd); \
printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
# Execute the command and also postprocess generated .d dependencies file.
-if_changed_dep = $(if $(strip $(any-prereq) $(cmd-check)),$(cmd_and_fixdep),@:)
+if_changed_dep = $(if $(any-prereq)$(cmd-check),$(cmd_and_fixdep),@:)
cmd_and_fixdep = \
$(cmd); \
@@ -243,7 +243,7 @@ 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 $(strip $(any-prereq) $(cmd-check)),$(rule_$(1)),@:)
+if_changed_rule = $(if $(any-prereq)$(cmd-check),$(rule_$(1)),@:)
# why - tell why a target got built