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Subject[PATCH] kbuild: let object files depend on recordmcount instead of its sources
This has the upside that distributions only have to ship the recordmcount
binary to allow building modules instead of recordmcount and it's sources.

Make still notices that the object files need to be rebuilt when
recordmcount's sources change.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
scripts/Makefile.build | 9 ++++-----
1 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index a0fd502..bc83e94 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -271,8 +271,7 @@ sub_cmd_record_mcount = \
if [ $(@) != "scripts/mod/empty.o" ]; then \
$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
fi;
-recordmcount_source := $(srctree)/scripts/recordmcount.c \
- $(srctree)/scripts/recordmcount.h
+recordmcount_exec := $(objtree)/scripts/recordmcount
else
sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
@@ -280,7 +279,7 @@ sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH
"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
"$(LD)" "$(NM)" "$(RM)" "$(MV)" \
"$(if $(part-of-module),1,0)" "$(@)";
-recordmcount_source := $(srctree)/scripts/recordmcount.pl
+recordmcount_exec := $(srctree)/scripts/recordmcount.pl
endif
cmd_record_mcount = \
if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \
@@ -301,13 +300,13 @@ define rule_cc_o_c
endef

# Built-in and composite module parts
-$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
+$(obj)/%.o: $(src)/%.c $(recordmcount_exec) FORCE
$(call cmd,force_checksrc)
$(call if_changed_rule,cc_o_c)

# Single-part modules are special since we need to mark them in $(MODVERDIR)

-$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
+$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_exec) FORCE
$(call cmd,force_checksrc)
$(call if_changed_rule,cc_o_c)
@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
--
1.7.6.3
--
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