| 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | |
| 3 | PHONY := __default |
| 4 | __default: vmlinux |
| 5 | |
| 6 | include include/config/auto.conf |
| 7 | include $(srctree)/scripts/Kbuild.include |
| 8 | |
| 9 | # for c_flags |
| 10 | include $(srctree)/scripts/Makefile.lib |
| 11 | |
| 12 | targets := |
| 13 | |
| 14 | quiet_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 | |
| 20 | ifdef CONFIG_MODULES |
| 21 | targets += .vmlinux.export.o |
| 22 | vmlinux: .vmlinux.export.o |
| 23 | endif |
| 24 | |
| 25 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
| 26 | |
| 27 | # Final link of vmlinux with optional arch pass after final link |
| 28 | cmd_link_vmlinux = \ |
| 29 | $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ |
| 30 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
| 31 | |
| 32 | targets += vmlinux |
| 33 | vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE |
| 34 | +$(call if_changed_dep,link_vmlinux) |
| 35 | |
| 36 | # module.builtin.ranges |
| 37 | # --------------------------------------------------------------------------- |
| 38 | ifdef CONFIG_BUILTIN_MODULE_RANGES |
| 39 | __default: modules.builtin.ranges |
| 40 | |
| 41 | quiet_cmd_modules_builtin_ranges = GEN $@ |
| 42 | cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@ |
| 43 | |
| 44 | targets += modules.builtin.ranges |
| 45 | modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \ |
| 46 | modules.builtin vmlinux.map vmlinux.o.map FORCE |
| 47 | $(call if_changed,modules_builtin_ranges) |
| 48 | |
| 49 | vmlinux.map: vmlinux |
| 50 | @: |
| 51 | |
| 52 | endif |
| 53 | |
| 54 | # Add FORCE to the prerequisites of a target to force it to be always rebuilt. |
| 55 | # --------------------------------------------------------------------------- |
| 56 | |
| 57 | PHONY += FORCE |
| 58 | FORCE: |
| 59 | |
| 60 | # Read all saved command lines and dependencies for the $(targets) we |
| 61 | # may be building above, using $(if_changed{,_dep}). As an |
| 62 | # optimization, we don't need to read them if the target does not |
| 63 | # exist, we will rebuild anyway in that case. |
| 64 | |
| 65 | existing-targets := $(wildcard $(sort $(targets))) |
| 66 | |
| 67 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
| 68 | |
| 69 | .PHONY: $(PHONY) |