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scripts/Makefile.modfinal 2.39 KB
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  # SPDX-License-Identifier: GPL-2.0-only
  # ===========================================================================
  # Module final link
  # ===========================================================================
  
  PHONY := __modfinal
  __modfinal:
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  include $(objtree)/include/config/auto.conf
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  include $(srctree)/scripts/Kbuild.include
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  # for c_flags and objtool_args
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  include $(srctree)/scripts/Makefile.lib
  
  # find all modules listed in modules.order
  modules := $(sort $(shell cat $(MODORDER)))
  
  __modfinal: $(modules)
  	@:
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  # modname and part-of-module are set to make c_flags define proper module flags
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  modname = $(notdir $(@:.mod.o=))
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  part-of-module = y
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  quiet_cmd_cc_o_c = CC [M]  $@
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        cmd_cc_o_c =							\
  		$(CC) $(filter-out $(CC_FLAGS_CFI) $(CC_FLAGS_FTRACE),	\
  			$(c_flags)) -c -o $@ $<
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  %.mod.o: %.mod.c FORCE
  	$(call if_changed_dep,cc_o_c)
  
  ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
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  ifdef CONFIG_LTO_CLANG
  # With CONFIG_LTO_CLANG, reuse the object file we compiled for modpost to
  # avoid a second slow LTO link
  prelink-ext := .lto
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  # ELF processing was skipped earlier because we didn't have native code,
  # so let's now process the prelinked binary before we link the module.
  
  ifdef CONFIG_STACK_VALIDATION
  ifneq ($(SKIP_STACK_VALIDATION),1)
  cmd_ld_ko_o +=								\
  	$(objtree)/tools/objtool/objtool $(objtool_args)		\
  		$(@:.ko=$(prelink-ext).o);
  
  endif # SKIP_STACK_VALIDATION
  endif # CONFIG_STACK_VALIDATION
  
  endif # CONFIG_LTO_CLANG
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  quiet_cmd_ld_ko_o = LD [M]  $@
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        cmd_ld_ko_o +=							\
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  	$(LD) -r $(KBUILD_LDFLAGS)					\
  		$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE)		\
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  		-T scripts/module.lds -o $@ $(filter %.o, $^);		\
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  	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
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  $(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds FORCE
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  	+$(call if_changed,ld_ko_o)
  
  targets += $(modules) $(modules:.ko=.mod.o)
  
  # Add FORCE to the prequisites of a target to force it to be always rebuilt.
  # ---------------------------------------------------------------------------
  
  PHONY += FORCE
  FORCE:
  
  # Read all saved command lines and dependencies for the $(targets) we
  # may be building above, using $(if_changed{,_dep}). As an
  # optimization, we don't need to read them if the target does not
  # exist, we will rebuild anyway in that case.
  
  existing-targets := $(wildcard $(sort $(targets)))
  
  -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
  
  .PHONY: $(PHONY)