Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention without any functional
difference. In fact, $(obj) and $(src) are exactly the same, as defined
in scripts/Makefile.build:
src := $(obj)
Before changing the semantics of $(src) in the next commit, this commit
replaces $(obj)/ with $(src)/ in pattern rules where the prerequisite
might be a generated file.
C and assembly files are sometimes generated by tools, so they could
be either generated files or real sources. The $(obj)/ prefix works
for both cases with the help of VPATH.
As mentioned above, $(obj) and $(src) are the same at this point, hence
this commit has no functional change.
I did not modify scripts/Makefile.userprogs because there is no use
case where userspace C files are generated.
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
scripts/Makefile.build | 18 +++++++++---------
scripts/Makefile.host | 4 ++--
2 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index baf86c0880b6..067c93fa76c2 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -113,13 +113,13 @@ endif
quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -fverbose-asm -S -o $@ $<
-$(obj)/%.s: $(src)/%.c FORCE
+$(obj)/%.s: $(obj)/%.c FORCE
$(call if_changed_dep,cc_s_c)
quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@
cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $<
-$(obj)/%.i: $(src)/%.c FORCE
+$(obj)/%.i: $(obj)/%.c FORCE
$(call if_changed_dep,cpp_i_c)
genksyms = scripts/genksyms/genksyms \
@@ -133,7 +133,7 @@ cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms)
quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
cmd_cc_symtypes_c = $(call cmd_gensymtypes_c,true,$@) >/dev/null
-$(obj)/%.symtypes : $(src)/%.c FORCE
+$(obj)/%.symtypes : $(obj)/%.c FORCE
$(call cmd,cc_symtypes_c)
# LLVM assembly
@@ -141,7 +141,7 @@ $(obj)/%.symtypes : $(src)/%.c FORCE
quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@
cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -fno-discard-value-names -o $@ $<
-$(obj)/%.ll: $(src)/%.c FORCE
+$(obj)/%.ll: $(obj)/%.c FORCE
$(call if_changed_dep,cc_ll_c)
# C (.c) files
@@ -240,7 +240,7 @@ define rule_as_o_S
endef
# Built-in and composite module parts
-$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
+$(obj)/%.o: $(obj)/%.c $(recordmcount_source) FORCE
$(call if_changed_rule,cc_o_c)
$(call cmd,force_checksrc)
@@ -257,7 +257,7 @@ quiet_cmd_cc_lst_c = MKLST $@
$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
System.map $(OBJDUMP) > $@
-$(obj)/%.lst: $(src)/%.c FORCE
+$(obj)/%.lst: $(obj)/%.c FORCE
$(call if_changed_dep,cc_lst_c)
# Compile Rust sources (.rs)
@@ -336,14 +336,14 @@ cmd_gensymtypes_S = \
quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
cmd_cc_symtypes_S = $(call cmd_gensymtypes_S,true,$@) >/dev/null
-$(obj)/%.symtypes : $(src)/%.S FORCE
+$(obj)/%.symtypes : $(obj)/%.S FORCE
$(call cmd,cc_symtypes_S)
quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@
cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $<
-$(obj)/%.s: $(src)/%.S FORCE
+$(obj)/%.s: $(obj)/%.S FORCE
$(call if_changed_dep,cpp_s_S)
quiet_cmd_as_o_S = AS $(quiet_modtag) $@
@@ -358,7 +358,7 @@ cmd_gen_symversions_S = $(call gen_symversions,S)
endif
-$(obj)/%.o: $(src)/%.S FORCE
+$(obj)/%.o: $(obj)/%.S FORCE
$(call if_changed_rule,as_o_S)
targets += $(filter-out $(subdir-builtin), $(real-obj-y))
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 3c17e6ba421c..d35f55e0d141 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -112,7 +112,7 @@ endif
quiet_cmd_host-csingle = HOSTCC $@
cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
-$(host-csingle): $(obj)/%: $(src)/%.c FORCE
+$(host-csingle): $(obj)/%: $(obj)/%.c FORCE
$(call if_changed_dep,host-csingle)
# Link an executable based on list of .o files, all plain c
@@ -129,7 +129,7 @@ $(call multi_depend, $(host-cmulti), , -objs)
# host-cobjs -> .o
quiet_cmd_host-cobjs = HOSTCC $@
cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
-$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
+$(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE
$(call if_changed_dep,host-cobjs)
# Link an executable based on list of .o files, a mixture of .c and .cc
--
2.40.1
