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kbuild: remove unneeded link_multi_deps

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Since commit c8589d1e9e ("kbuild: handle multi-objs dependency
appropriately"), $^ really represents all the prerequisite of the
composite object being built.

Hence, $(filter %.o,$^) contains all the objects to link together,
which is much simpler than link_multi_deps calculation.

Please note $(filter-out FORCE,$^) does not work here. When a single
object module is turned into a multi object module, $^ will contain
header files that were previously included for building the single
object, and recorded in the .*.cmd file. To filter out such headers,
$(filter %.o,$^) should be used here.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2018-10-04 13:25:19 +09:00
parent 9df3e7a7d7
commit 69ea912fda
1 changed files with 2 additions and 18 deletions
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20
scripts/Makefile.build
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@ -485,28 +485,12 @@ targets += $(obj)/lib-ksyms.o
endif
#
# Rule to link composite objects
#
# Composite objects are specified in kbuild makefile as follows:
# <composite-object>-objs := <list of .o files>
# or
# <composite-object>-y := <list of .o files>
# or
# <composite-object>-m := <list of .o files>
# The -m syntax only works if <composite object> is a module
link_multi_deps = \
$(filter $(addprefix $(obj)/, \
$($(subst $(obj)/,,$(@:.o=-objs))) \
$($(subst $(obj)/,,$(@:.o=-y))) \
$($(subst $(obj)/,,$(@:.o=-m)))), $^)
quiet_cmd_link_multi-m = LD [M] $@
cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) $(cmd_secanalysis)
$(multi-used-m): FORCE
$(call if_changed,link_multi-m)
@{ echo $(@:.o=.ko); echo $(link_multi_deps); \
@{ echo $(@:.o=.ko); echo $(filter %.o,$^); \
$(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
$(call multi_depend, $(multi-used-m), .o, -objs -y -m)