| # SPDX-License-Identifier: GPL-2.0-only |
| # =========================================================================== |
| # Module final link |
| # =========================================================================== |
| |
| PHONY := __modfinal |
| __modfinal: |
| |
| include include/config/auto.conf |
| include $(srctree)/scripts/Kbuild.include |
| |
| # for c_flags |
| include $(srctree)/scripts/Makefile.lib |
| |
| mixed-build-prefix = $(if $(KBUILD_MIXED_TREE),$(KBUILD_MIXED_TREE)/) |
| |
| # find all modules listed in modules.order |
| modules := $(call read-file, $(MODORDER)) |
| |
| __modfinal: $(modules:%.o=%.ko) |
| @: |
| |
| # modname and part-of-module are set to make c_flags define proper module flags |
| modname = $(notdir $(@:.mod.o=)) |
| part-of-module = y |
| |
| quiet_cmd_cc_o_c = CC [M] $@ |
| cmd_cc_o_c = $(CC) $(filter-out $(CC_FLAGS_CFI), $(c_flags)) -c -o $@ $< |
| |
| %.mod.o: %.mod.c FORCE |
| $(call if_changed_dep,cc_o_c) |
| |
| ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
| |
| quiet_cmd_ld_ko_o = LD [M] $@ |
| cmd_ld_ko_o += \ |
| $(LD) -r $(KBUILD_LDFLAGS) \ |
| $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ |
| -T scripts/module.lds -o $@ $(filter %.o, $^); \ |
| $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
| |
| quiet_cmd_btf_ko = BTF [M] $@ |
| cmd_btf_ko = \ |
| if [ ! -f $(mixed-build-prefix)vmlinux ]; then \ |
| printf "Skipping BTF generation for %s due to unavailability of $(mixed-build-prefix)vmlinux\n" $@ 1>&2; \ |
| elif [ -n "$(CONFIG_RUST)" ] && $(srctree)/scripts/is_rust_module.sh $@; then \ |
| printf "Skipping BTF generation for %s because it's a Rust module\n" $@ 1>&2; \ |
| else \ |
| LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J $(PAHOLE_FLAGS) --btf_base $(mixed-build-prefix)vmlinux $@; \ |
| $(RESOLVE_BTFIDS) -b $(mixed-build-prefix)vmlinux $@; \ |
| fi; |
| |
| # Same as newer-prereqs, but allows to exclude specified extra dependencies |
| newer_prereqs_except = $(filter-out $(PHONY) $(1),$?) |
| |
| # Same as if_changed, but allows to exclude specified extra dependencies |
| if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ |
| $(cmd); \ |
| printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) |
| |
| # Re-generate module BTFs if either module's .ko or vmlinux changed |
| %.ko: %.o %.mod.o scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),$(mixed-build-prefix)vmlinux) FORCE |
| +$(call if_changed_except,ld_ko_o,$(mixed-build-prefix)vmlinux) |
| ifdef CONFIG_DEBUG_INFO_BTF_MODULES |
| +$(if $(newer-prereqs),$(call cmd,btf_ko)) |
| endif |
| |
| targets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) |
| |
| # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
| # --------------------------------------------------------------------------- |
| |
| PHONY += FORCE |
| FORCE: |
| |
| # Read all saved command lines and dependencies for the $(targets) we |
| # may be building above, using $(if_changed{,_dep}). As an |
| # optimization, we don't need to read them if the target does not |
| # exist, we will rebuild anyway in that case. |
| |
| existing-targets := $(wildcard $(sort $(targets))) |
| |
| -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
| |
| .PHONY: $(PHONY) |