1# SPDX-License-Identifier: GPL-2.0-only
2
3PHONY := __default
4__default: vmlinux
5
6include include/config/auto.conf
7include $(srctree)/scripts/Kbuild.include
8
9# for c_flags
10include $(srctree)/scripts/Makefile.lib
11
12targets :=
13
14quiet_cmd_cc_o_c = CC      $@
15      cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
16
17%.o: %.c FORCE
18	$(call if_changed_dep,cc_o_c)
19
20ifdef CONFIG_MODULES
21KASAN_SANITIZE_.vmlinux.export.o := n
22GCOV_PROFILE_.vmlinux.export.o := n
23targets += .vmlinux.export.o
24vmlinux: .vmlinux.export.o
25endif
26
27ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
28
29# Final link of vmlinux with optional arch pass after final link
30cmd_link_vmlinux =							\
31	$< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";		\
32	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
33
34targets += vmlinux
35vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE
36	+$(call if_changed_dep,link_vmlinux)
37
38# Add FORCE to the prequisites of a target to force it to be always rebuilt.
39# ---------------------------------------------------------------------------
40
41PHONY += FORCE
42FORCE:
43
44# Read all saved command lines and dependencies for the $(targets) we
45# may be building above, using $(if_changed{,_dep}). As an
46# optimization, we don't need to read them if the target does not
47# exist, we will rebuild anyway in that case.
48
49existing-targets := $(wildcard $(sort $(targets)))
50
51-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
52
53.PHONY: $(PHONY)
54