projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 5d45950d MY |
1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | ||
| 3 | PHONY := __default | |
| 4 | __default: vmlinux.o | |
| 5 | ||
| 6 | include include/config/auto.conf | |
| 7 | include $(srctree)/scripts/Kbuild.include | |
| 8 | ||
| 9 | # Generate a linker script to ensure correct ordering of initcalls for Clang LTO | |
| 10 | # --------------------------------------------------------------------------- | |
| 11 | ||
| 12 | quiet_cmd_gen_initcalls_lds = GEN $@ | |
| 13 | cmd_gen_initcalls_lds = \ | |
| 14 | $(PYTHON3) $(srctree)/scripts/jobserver-exec \ | |
| 15 | $(PERL) $(real-prereqs) > $@ | |
| 16 | ||
| 17 | .tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \ | |
| 18 | $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE | |
| 19 | $(call if_changed,gen_initcalls_lds) | |
| 20 | ||
| 21 | targets := .tmp_initcalls.lds | |
| 22 | ||
| 23 | ifdef CONFIG_LTO_CLANG | |
| 24 | initcalls-lds := .tmp_initcalls.lds | |
| 25 | endif | |
| 26 | ||
| 27 | # Link of vmlinux.o used for section mismatch analysis | |
| 28 | # --------------------------------------------------------------------------- | |
| 29 | ||
| 30 | quiet_cmd_ld_vmlinux.o = LD $@ | |
| 31 | cmd_ld_vmlinux.o = \ | |
| 32 | $(LD) ${KBUILD_LDFLAGS} -r -o $@ \ | |
| 33 | $(addprefix -T , $(initcalls-lds)) \ | |
| 34 | --whole-archive $(KBUILD_VMLINUX_OBJS) --no-whole-archive \ | |
| 35 | --start-group $(KBUILD_VMLINUX_LIBS) --end-group \ | |
| 36 | ||
| 37 | define rule_ld_vmlinux.o | |
| 38 | $(call cmd_and_savecmd,ld_vmlinux.o) | |
| 39 | endef | |
| 40 | ||
| 41 | vmlinux.o: $(initcalls-lds) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE | |
| 42 | $(call if_changed_rule,ld_vmlinux.o) | |
| 43 | ||
| 44 | targets += vmlinux.o | |
| 45 | ||
| 46 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
| 47 | # --------------------------------------------------------------------------- | |
| 48 | ||
| 49 | PHONY += FORCE | |
| 50 | FORCE: | |
| 51 | ||
| 52 | # Read all saved command lines and dependencies for the $(targets) we | |
| 53 | # may be building above, using $(if_changed{,_dep}). As an | |
| 54 | # optimization, we don't need to read them if the target does not | |
| 55 | # exist, we will rebuild anyway in that case. | |
| 56 | ||
| 57 | existing-targets := $(wildcard $(sort $(targets))) | |
| 58 | ||
| 59 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
| 60 | ||
| 61 | .PHONY: $(PHONY) |