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1# SPDX-License-Identifier: GPL-2.0-only
2# ===========================================================================
3# Module final link
4# ===========================================================================
5
6PHONY := __modfinal
7__modfinal:
8
9include $(objtree)/include/config/auto.conf
10include $(srctree)/scripts/Kbuild.include
11
12# for c_flags
13include $(srctree)/scripts/Makefile.lib
14
15# find all modules listed in modules.order
16modules := $(sort $(shell cat $(MODORDER)))
17
18__modfinal: $(modules)
19	@:
20
21# modname and part-of-module are set to make c_flags define proper module flags
22modname = $(notdir $(@:.mod.o=))
23part-of-module = y
24
25quiet_cmd_cc_o_c = CC [M]  $@
26      cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
27
28%.mod.o: %.mod.c FORCE
29	$(call if_changed_dep,cc_o_c)
30
31ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
32
33quiet_cmd_ld_ko_o = LD [M]  $@
34
35ifdef CONFIG_LTO_CLANG
36      cmd_ld_ko_o = 							\
37	$(LD) -r $(LDFLAGS)                                 		\
38		 $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) 		\
39		 $(addprefix -T , $(KBUILD_LDS_MODULE))			\
40		 $(shell [ -s $(@:.ko=.o.symversions) ] &&		\
41			echo -T $(@:.ko=.o.symversions))  		\
42		 -o $@ --whole-archive $(filter %.o, $^);		\
43	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
44
45  ifdef CONFIG_FTRACE_MCOUNT_RECORD
46      cmd_ld_ko_o += ; $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) $@
47  endif
48else
49      cmd_ld_ko_o =                                                     \
50	$(LD) -r $(KBUILD_LDFLAGS)					\
51		$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE)		\
52		$(addprefix -T , $(KBUILD_LDS_MODULE))			\
53		-o $@ $(filter %.o, $^);				\
54	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
55endif
56
57$(modules): %.ko: %.o %.mod.o $(KBUILD_LDS_MODULE) FORCE
58	+$(call if_changed,ld_ko_o)
59
60targets += $(modules) $(modules:.ko=.mod.o)
61
62# Add FORCE to the prequisites of a target to force it to be always rebuilt.
63# ---------------------------------------------------------------------------
64
65PHONY += FORCE
66FORCE:
67
68# Read all saved command lines and dependencies for the $(targets) we
69# may be building above, using $(if_changed{,_dep}). As an
70# optimization, we don't need to read them if the target does not
71# exist, we will rebuild anyway in that case.
72
73existing-targets := $(wildcard $(sort $(targets)))
74
75-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
76
77.PHONY: $(PHONY)
78