kbuild: cherry-pick kbuild changes from Linux

[oweals/u-boot.git] / scripts / Kbuild.include

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index cad3b6e76c627d196e1ce060a8c8392063b31742..dfb67226b08dfad9af8d6186838865cf19a53d8c 100644 (file)
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -7,6 +7,7 @@ quote   := "
 squote  := '
 empty   :=
 space   := $(empty) $(empty)
+space_escape := _-_SPACE_-_
 pound := \#
 
 ###
@@ -234,10 +235,10 @@ objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
 # See Documentation/kbuild/makefiles.txt for more info
 
 ifneq ($(KBUILD_NOCMDDEP),1)
-# Check if both arguments has same arguments. Result is empty string if equal.
-# User may override this check using make KBUILD_NOCMDDEP=1
-arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
-                    $(filter-out $(cmd_$@),   $(cmd_$(1))) )
+# Check if both arguments are the same including their order. Result is empty
+# string if equal. User may override this check using make KBUILD_NOCMDDEP=1
+arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
+                         $(subst $(space),$(space_escape),$(strip $(cmd_$1))))
 else
 arg-check = $(if $(strip $(cmd_$@)),,1)
 endif
@@ -259,7 +260,7 @@ any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
 if_changed = $(if $(strip $(any-prereq) $(arg-check)),                       \
        @set -e;                                                             \
        $(echo-cmd) $(cmd_$(1));                                             \
-       printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
+       printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
 
 # Execute the command and also postprocess generated .d dependencies file.
 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ),                  \
@@ -267,14 +268,14 @@ if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ),                  \
        $(echo-cmd) $(cmd_$(1));                                             \
        scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
        rm -f $(depfile);                                                    \
-       mv -f $(dot-target).tmp $(dot-target).cmd)
+       mv -f $(dot-target).tmp $(dot-target).cmd, @:)
 
 # 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) $(arg-check) ),                 \
        @set -e;                                                             \
-       $(rule_$(1)))
+       $(rule_$(1)), @:)
 
 ###
 # why - tell why a a target got build