[PATCH v2 1/5] kbuild: remove unnecessary $(subst $(obj)/, , ...) in modname-multi

From: Masahiro Yamada
Date: Mon Mar 19 2018 - 05:02:32 EST


In the context ...

$(obj)/%.s: $(src)/%.c FORCE
$(call if_changed_dep,cc_s_c)

$(obj)/%.i: $(src)/%.c FORCE
$(call if_changed_dep,cpp_i_c)

$(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
$(call cmd,force_checksrc)
$(call if_changed_rule,cc_o_c)

$(obj)/%.lst: $(src)/%.c FORCE
$(call if_changed_dep,cc_lst_c)

'$*' returns the stem of the target (the part of '%'), so $(obj)/ has
already been ripped off.

$(subst $(obj)/,,$*.o) is the same as $*.o

Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Reviewed-by: Cao jin <caoj.fnst@xxxxxxxxxxxxxx>
---

Changes in v2: None

scripts/Makefile.lib | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 5fd60af..4eedd6e 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -175,7 +175,7 @@ dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \

# Finds the multi-part object the current object will be linked into
modname-multi = $(sort $(foreach m,$(multi-used),\
- $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
+ $(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))

# Useful for describing the dependency of composite objects
# Usage:
--
2.7.4