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 $(call if_changed_dep,cc_o_c) 19 20ifdef CONFIG_MODULES 21targets += .vmlinux.export.o 22vmlinux: .vmlinux.export.o 23endif 24 25ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX 26vmlinux: arch/$(SRCARCH)/tools/vmlinux.arch.o 27 28arch/$(SRCARCH)/tools/vmlinux.arch.o: vmlinux.o FORCE 29 $(Q)$(MAKE) $(build)=arch/$(SRCARCH)/tools $@ 30endif 31 32ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 33 34# Final link of vmlinux with optional arch pass after final link 35cmd_link_vmlinux = \ 36 $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ 37 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 38 39targets += vmlinux 40vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE 41 +$(call if_changed_dep,link_vmlinux) 42 43# module.builtin.ranges 44# --------------------------------------------------------------------------- 45ifdef CONFIG_BUILTIN_MODULE_RANGES 46__default: modules.builtin.ranges 47 48quiet_cmd_modules_builtin_ranges = GEN $@ 49 cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@ 50 51targets += modules.builtin.ranges 52modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \ 53 modules.builtin vmlinux.map vmlinux.o.map FORCE 54 $(call if_changed,modules_builtin_ranges) 55 56vmlinux.map: vmlinux 57 @: 58 59endif 60 61# Add FORCE to the prerequisites of a target to force it to be always rebuilt. 62# --------------------------------------------------------------------------- 63 64PHONY += FORCE 65FORCE: 66 67# Read all saved command lines and dependencies for the $(targets) we 68# may be building above, using $(if_changed{,_dep}). As an 69# optimization, we don't need to read them if the target does not 70# exist, we will rebuild anyway in that case. 71 72existing-targets := $(wildcard $(sort $(targets))) 73 74-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 75 76.PHONY: $(PHONY) 77