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 21targets += .vmlinux.export.o 22vmlinux: .vmlinux.export.o 23 24ifdef CONFIG_MODULE_SIG_PROTECT 25targets += .vmlinux.protected-exports.o 26vmlinux: .vmlinux.protected-exports.o 27endif 28 29ifdef CONFIG_TRIM_UNUSED_KSYMS 30targets += .vmlinux.permitted-imports.o 31vmlinux: .vmlinux.permitted-imports.o 32endif 33 34endif 35 36ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 37 38# Final link of vmlinux with optional arch pass after final link 39cmd_link_vmlinux = \ 40 $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ 41 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 42 43targets += vmlinux 44vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE 45 +$(call if_changed_dep,link_vmlinux) 46 47ifdef CONFIG_BUILDTIME_TABLE_SORT 48vmlinux: scripts/sorttable 49endif 50 51# module.builtin.ranges 52# --------------------------------------------------------------------------- 53ifdef CONFIG_BUILTIN_MODULE_RANGES 54__default: modules.builtin.ranges 55 56quiet_cmd_modules_builtin_ranges = GEN $@ 57 cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@ 58 59targets += modules.builtin.ranges 60modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \ 61 modules.builtin vmlinux.map vmlinux.o.map FORCE 62 $(call if_changed,modules_builtin_ranges) 63 64vmlinux.map: vmlinux 65 @: 66 67endif 68 69# Add FORCE to the prerequisites of a target to force it to be always rebuilt. 70# --------------------------------------------------------------------------- 71 72PHONY += FORCE 73FORCE: 74 75# Read all saved command lines and dependencies for the $(targets) we 76# may be building above, using $(if_changed{,_dep}). As an 77# optimization, we don't need to read them if the target does not 78# exist, we will rebuild anyway in that case. 79 80existing-targets := $(wildcard $(sort $(targets))) 81 82-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 83 84.PHONY: $(PHONY) 85