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 22targets += .vmlinux.export.o 23vmlinux: .vmlinux.export.o 24endif 25 26ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 27 28# Final link of vmlinux with optional arch pass after final link 29cmd_link_vmlinux = \ 30 $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ 31 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 32 33targets += vmlinux 34vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE 35 +$(call if_changed_dep,link_vmlinux) 36 37# Add FORCE to the prequisites of a target to force it to be always rebuilt. 38# --------------------------------------------------------------------------- 39 40PHONY += FORCE 41FORCE: 42 43# Read all saved command lines and dependencies for the $(targets) we 44# may be building above, using $(if_changed{,_dep}). As an 45# optimization, we don't need to read them if the target does not 46# exist, we will rebuild anyway in that case. 47 48existing-targets := $(wildcard $(sort $(targets))) 49 50-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 51 52.PHONY: $(PHONY) 53