diff options
Diffstat (limited to 'rust/Makefile')
| -rw-r--r-- | rust/Makefile | 191 |
1 files changed, 146 insertions, 45 deletions
diff --git a/rust/Makefile b/rust/Makefile index 43cd7f845a9a..dfde685264e1 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -11,11 +11,8 @@ always-$(CONFIG_RUST) += exports_core_generated.h obj-$(CONFIG_RUST) += helpers/helpers.o CFLAGS_REMOVE_helpers/helpers.o = -Wmissing-prototypes -Wmissing-declarations -always-$(CONFIG_RUST) += libmacros.so -no-clean-files += libmacros.so - always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs -obj-$(CONFIG_RUST) += bindings.o kernel.o +obj-$(CONFIG_RUST) += bindings.o pin_init.o kernel.o always-$(CONFIG_RUST) += exports_helpers_generated.h \ exports_bindings_generated.h exports_kernel_generated.h @@ -38,9 +35,17 @@ obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.o always-$(subst y,$(CONFIG_RUST),$(CONFIG_JUMP_LABEL)) += kernel/generated_arch_static_branch_asm.rs -# Avoids running `$(RUSTC)` for the sysroot when it may not be available. +# Avoids running `$(RUSTC)` when it may not be available. ifdef CONFIG_RUST +libmacros_name := $(shell MAKEFLAGS= $(RUSTC) --print file-names --crate-name macros --crate-type proc-macro - </dev/null) +libmacros_extension := $(patsubst libmacros.%,%,$(libmacros_name)) + +libpin_init_internal_name := $(shell MAKEFLAGS= $(RUSTC) --print file-names --crate-name pin_init_internal --crate-type proc-macro - </dev/null) +libpin_init_internal_extension := $(patsubst libpin_init_internal.%,%,$(libpin_init_internal_name)) + +always-$(CONFIG_RUST) += $(libmacros_name) $(libpin_init_internal_name) + # `$(rust_flags)` is passed in case the user added `--sysroot`. rustc_sysroot := $(shell MAKEFLAGS= $(RUSTC) $(rust_flags) --print sysroot) rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2) @@ -55,14 +60,25 @@ endif core-cfgs = \ --cfg no_fp_fmt_parse +core-edition := $(if $(call rustc-min-version,108700),2024,2021) + +# `rustdoc` did not save the target modifiers, thus workaround for +# the time being (https://github.com/rust-lang/rust/issues/144521). +rustdoc_modifiers_workaround := $(if $(call rustc-min-version,108800),-Cunsafe-allow-abi-mismatch=fixed-x18) + +# `rustc` recognizes `--remap-path-prefix` since 1.26.0, but `rustdoc` only +# since Rust 1.81.0. Moreover, `rustdoc` ICEs on out-of-tree builds since Rust +# 1.82.0 (https://github.com/rust-lang/rust/issues/138520). Thus workaround both +# issues skipping the flag. The former also applies to `RUSTDOC TK`. quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< cmd_rustdoc = \ OBJTREE=$(abspath $(objtree)) \ - $(RUSTDOC) $(filter-out $(skip_flags),$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \ + $(RUSTDOC) $(filter-out $(skip_flags) --remap-path-prefix=%,$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \ $(rustc_target_flags) -L$(objtree)/$(obj) \ -Zunstable-options --generate-link-to-definition \ --output $(rustdoc_output) \ --crate-name $(subst rustdoc-,,$@) \ + $(rustdoc_modifiers_workaround) \ $(if $(rustdoc_host),,--sysroot=/dev/null) \ @$(objtree)/include/generated/rustc_cfg $< @@ -78,7 +94,7 @@ quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< # command-like flags to solve the issue. Meanwhile, we use the non-custom case # and then retouch the generated files. rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ - rustdoc-kernel + rustdoc-kernel rustdoc-pin_init $(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/ $(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/ $(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \ @@ -92,14 +108,14 @@ rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ rustdoc-macros: private rustdoc_host = yes rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ --extern proc_macro -rustdoc-macros: $(src)/macros/lib.rs FORCE +rustdoc-macros: $(src)/macros/lib.rs rustdoc-clean FORCE +$(call if_changed,rustdoc) # Starting with Rust 1.82.0, skipping `-Wrustdoc::unescaped_backticks` should # not be needed -- see https://github.com/rust-lang/rust/pull/128307. -rustdoc-core: private skip_flags = -Wrustdoc::unescaped_backticks -rustdoc-core: private rustc_target_flags = $(core-cfgs) -rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE +rustdoc-core: private skip_flags = --edition=2021 -Wrustdoc::unescaped_backticks +rustdoc-core: private rustc_target_flags = --edition=$(core-edition) $(core-cfgs) +rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs rustdoc-clean FORCE +$(call if_changed,rustdoc) rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE @@ -108,18 +124,35 @@ rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE rustdoc-ffi: $(src)/ffi.rs rustdoc-core FORCE +$(call if_changed,rustdoc) -rustdoc-kernel: private rustc_target_flags = --extern ffi \ - --extern build_error --extern macros=$(objtree)/$(obj)/libmacros.so \ +rustdoc-pin_init_internal: private rustdoc_host = yes +rustdoc-pin_init_internal: private rustc_target_flags = --cfg kernel \ + --extern proc_macro --crate-type proc-macro +rustdoc-pin_init_internal: $(src)/pin-init/internal/src/lib.rs \ + rustdoc-clean FORCE + +$(call if_changed,rustdoc) + +rustdoc-pin_init: private rustdoc_host = yes +rustdoc-pin_init: private rustc_target_flags = --extern pin_init_internal \ + --extern macros --extern alloc --cfg kernel --cfg feature=\"alloc\" +rustdoc-pin_init: $(src)/pin-init/src/lib.rs rustdoc-pin_init_internal \ + rustdoc-macros FORCE + +$(call if_changed,rustdoc) + +rustdoc-kernel: private rustc_target_flags = --extern ffi --extern pin_init \ + --extern build_error --extern macros \ --extern bindings --extern uapi rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \ - rustdoc-compiler_builtins $(obj)/libmacros.so \ + rustdoc-pin_init rustdoc-compiler_builtins $(obj)/$(libmacros_name) \ $(obj)/bindings.o FORCE +$(call if_changed,rustdoc) -quiet_cmd_rustc_test_library = RUSTC TL $< +rustdoc-clean: FORCE + $(Q)rm -rf $(rustdoc_output) + +quiet_cmd_rustc_test_library = $(RUSTC_OR_CLIPPY_QUIET) TL $< cmd_rustc_test_library = \ OBJTREE=$(abspath $(objtree)) \ - $(RUSTC) $(rust_common_flags) \ + $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ @$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \ --crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \ --out-dir $(objtree)/$(obj)/test --cfg testlib \ @@ -137,12 +170,24 @@ rusttestlib-macros: private rustc_test_library_proc = yes rusttestlib-macros: $(src)/macros/lib.rs FORCE +$(call if_changed,rustc_test_library) +rusttestlib-pin_init_internal: private rustc_target_flags = --cfg kernel \ + --extern proc_macro +rusttestlib-pin_init_internal: private rustc_test_library_proc = yes +rusttestlib-pin_init_internal: $(src)/pin-init/internal/src/lib.rs FORCE + +$(call if_changed,rustc_test_library) + +rusttestlib-pin_init: private rustc_target_flags = --extern pin_init_internal \ + --extern macros --cfg kernel +rusttestlib-pin_init: $(src)/pin-init/src/lib.rs rusttestlib-macros \ + rusttestlib-pin_init_internal $(obj)/$(libpin_init_internal_name) FORCE + +$(call if_changed,rustc_test_library) + rusttestlib-kernel: private rustc_target_flags = --extern ffi \ - --extern build_error --extern macros \ + --extern build_error --extern macros --extern pin_init \ --extern bindings --extern uapi -rusttestlib-kernel: $(src)/kernel/lib.rs \ - rusttestlib-bindings rusttestlib-uapi rusttestlib-build_error \ - $(obj)/libmacros.so $(obj)/bindings.o FORCE +rusttestlib-kernel: $(src)/kernel/lib.rs rusttestlib-bindings rusttestlib-uapi \ + rusttestlib-build_error rusttestlib-pin_init $(obj)/$(libmacros_name) \ + $(obj)/bindings.o FORCE +$(call if_changed,rustc_test_library) rusttestlib-bindings: private rustc_target_flags = --extern ffi @@ -158,6 +203,7 @@ quiet_cmd_rustdoc_test = RUSTDOC T $< RUST_MODFILE=test.rs \ OBJTREE=$(abspath $(objtree)) \ $(RUSTDOC) --test $(rust_common_flags) \ + -Zcrate-attr='feature(used_with_arg)' \ @$(objtree)/include/generated/rustc_cfg \ $(rustc_target_flags) $(rustdoc_test_target_flags) \ $(rustdoc_test_quiet) \ @@ -169,12 +215,13 @@ quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $< rm -rf $(objtree)/$(obj)/test/doctests/kernel; \ mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \ OBJTREE=$(abspath $(objtree)) \ - $(RUSTDOC) --test $(rust_flags) \ - -L$(objtree)/$(obj) --extern ffi --extern kernel \ - --extern build_error --extern macros \ + $(RUSTDOC) --test $(filter-out --remap-path-prefix=%,$(rust_flags)) \ + -L$(objtree)/$(obj) --extern ffi --extern pin_init \ + --extern kernel --extern build_error --extern macros \ --extern bindings --extern uapi \ --no-run --crate-name kernel -Zunstable-options \ --sysroot=/dev/null \ + $(rustdoc_modifiers_workaround) \ --test-builder $(objtree)/scripts/rustdoc_test_builder \ $< $(rustdoc_test_kernel_quiet); \ $(objtree)/scripts/rustdoc_test_gen @@ -187,10 +234,10 @@ quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $< # We cannot use `-Zpanic-abort-tests` because some tests are dynamic, # so for the moment we skip `-Cpanic=abort`. -quiet_cmd_rustc_test = RUSTC T $< +quiet_cmd_rustc_test = $(RUSTC_OR_CLIPPY_QUIET) T $< cmd_rustc_test = \ OBJTREE=$(abspath $(objtree)) \ - $(RUSTC) --test $(rust_common_flags) \ + $(RUSTC_OR_CLIPPY) --test $(rust_common_flags) \ @$(objtree)/include/generated/rustc_cfg \ $(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \ -L$(objtree)/$(obj)/test \ @@ -201,18 +248,18 @@ quiet_cmd_rustc_test = RUSTC T $< rusttest: rusttest-macros rusttest-kernel rusttest-macros: private rustc_target_flags = --extern proc_macro \ - --extern macros --extern kernel + --extern macros --extern kernel --extern pin_init rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro rusttest-macros: $(src)/macros/lib.rs \ - rusttestlib-macros rusttestlib-kernel FORCE + rusttestlib-macros rusttestlib-kernel rusttestlib-pin_init FORCE +$(call if_changed,rustc_test) +$(call if_changed,rustdoc_test) -rusttest-kernel: private rustc_target_flags = --extern ffi \ +rusttest-kernel: private rustc_target_flags = --extern ffi --extern pin_init \ --extern build_error --extern macros --extern bindings --extern uapi rusttest-kernel: $(src)/kernel/lib.rs rusttestlib-ffi rusttestlib-kernel \ rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \ - rusttestlib-uapi FORCE + rusttestlib-uapi rusttestlib-pin_init FORCE +$(call if_changed,rustc_test) ifdef CONFIG_CC_IS_CLANG @@ -230,7 +277,8 @@ bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ -mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \ -mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \ -mno-pointers-to-nested-functions -mno-string \ - -mno-strict-align -mstrict-align \ + -mno-strict-align -mstrict-align -mdirect-extern-access \ + -mexplicit-relocs -mno-check-zero-division \ -fconserve-stack -falign-jumps=% -falign-loops=% \ -femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \ -fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \ @@ -238,12 +286,15 @@ bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ -fzero-call-used-regs=% -fno-stack-clash-protection \ -fno-inline-functions-called-once -fsanitize=bounds-strict \ -fstrict-flex-arrays=% -fmin-function-alignment=% \ - -fzero-init-padding-bits=% \ + -fzero-init-padding-bits=% -mno-fdpic \ --param=% --param asan-% # Derived from `scripts/Makefile.clang`. BINDGEN_TARGET_x86 := x86_64-linux-gnu BINDGEN_TARGET_arm64 := aarch64-linux-gnu +BINDGEN_TARGET_arm := arm-linux-gnueabi +BINDGEN_TARGET_loongarch := loongarch64-linux-gnusf +BINDGEN_TARGET_um := $(BINDGEN_TARGET_$(SUBARCH)) BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) # All warnings are inhibited since GCC builds are very experimental, @@ -330,10 +381,11 @@ $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; $(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE $(call if_changed_dep,bindgen) +rust_exports = $(NM) -p --defined-only $(1) | awk '$$2~/(T|R|D|B)/ && $$3!~/__(pfx|cfi|odr_asan)/ { printf $(2),$$3 }' + quiet_cmd_exports = EXPORTS $@ cmd_exports = \ - $(NM) -p --defined-only $< \ - | awk '$$2~/(T|R|D|B)/ && $$3!~/__cfi/ {printf "EXPORT_SYMBOL_RUST_GPL(%s);\n",$$3}' > $@ + $(call rust_exports,$<,"EXPORT_SYMBOL_RUST_GPL(%s);\n") > $@ $(obj)/exports_core_generated.h: $(obj)/core.o FORCE $(call if_changed,exports) @@ -358,22 +410,27 @@ $(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ cmd_rustc_procmacro = \ - $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ + $(RUSTC_OR_CLIPPY) $(rust_common_flags) $(rustc_target_flags) \ -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ - -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \ + -Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \ --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ --crate-type proc-macro \ - --crate-name $(patsubst lib%.so,%,$(notdir $@)) $< + --crate-name $(patsubst lib%.$(libmacros_extension),%,$(notdir $@)) \ + @$(objtree)/include/generated/rustc_cfg $< # Procedural macros can only be used with the `rustc` that compiled it. -$(obj)/libmacros.so: $(src)/macros/lib.rs FORCE +$(obj)/$(libmacros_name): $(src)/macros/lib.rs FORCE + +$(call if_changed_dep,rustc_procmacro) + +$(obj)/$(libpin_init_internal_name): private rustc_target_flags = --cfg kernel +$(obj)/$(libpin_init_internal_name): $(src)/pin-init/internal/src/lib.rs FORCE +$(call if_changed_dep,rustc_procmacro) quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ cmd_rustc_library = \ OBJTREE=$(abspath $(objtree)) \ $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ - $(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ + $(filter-out $(skip_flags),$(rust_flags)) $(rustc_target_flags) \ --emit=dep-info=$(depfile) --emit=obj=$@ \ --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \ --crate-type rlib -L$(objtree)/$(obj) \ @@ -383,8 +440,8 @@ quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $(cmd_objtool) rust-analyzer: - $(Q)$(srctree)/scripts/generate_rust_analyzer.py \ - --cfgs='core=$(core-cfgs)' \ + $(Q)MAKEFLAGS= $(srctree)/scripts/generate_rust_analyzer.py \ + --cfgs='core=$(core-cfgs)' $(core-edition) \ $(realpath $(srctree)) $(realpath $(objtree)) \ $(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \ > rust-project.json @@ -395,6 +452,13 @@ redirect-intrinsics = \ __muloti4 __multi3 \ __udivmodti4 __udivti3 __umodti3 +ifdef CONFIG_ARM + # Add eabi initrinsics for ARM 32-bit + redirect-intrinsics += \ + __aeabi_fadd __aeabi_fmul __aeabi_fcmpeq __aeabi_fcmple __aeabi_fcmplt __aeabi_fcmpun \ + __aeabi_dadd __aeabi_dmul __aeabi_dcmple __aeabi_dcmplt __aeabi_dcmpun \ + __aeabi_uldivmod +endif ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) # These intrinsics are defined for ARM64 and RISCV64 redirect-intrinsics += \ @@ -402,29 +466,65 @@ ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) __ashlti3 __lshrti3 endif +ifdef CONFIG_MODVERSIONS +cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \ + $(call rust_exports,$@,"%s\n") | \ + scripts/gendwarfksyms/gendwarfksyms \ + $(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable) \ + $(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes),) \ + $@ >> $(dot-target).cmd) +endif + define rule_rustc_library $(call cmd_and_fixdep,rustc_library) $(call cmd,gen_objtooldep) + $(call cmd,gendwarfksyms) +endef + +define rule_rust_cc_library + $(call if_changed_rule,cc_o_c) + $(call cmd,force_checksrc) + $(call cmd,gendwarfksyms) endef +# helpers.o uses the same export mechanism as Rust libraries, so ensure symbol +# versions are calculated for the helpers too. +$(obj)/helpers/helpers.o: $(src)/helpers/helpers.c $(recordmcount_source) FORCE + +$(call if_changed_rule,rust_cc_library) + +# Disable symbol versioning for exports.o to avoid conflicts with the actual +# symbol versions generated from Rust objects. +$(obj)/exports.o: private skip_gendwarfksyms = 1 + $(obj)/core.o: private skip_clippy = 1 -$(obj)/core.o: private skip_flags = -Wunreachable_pub +$(obj)/core.o: private skip_flags = --edition=2021 -Wunreachable_pub $(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym)) -$(obj)/core.o: private rustc_target_flags = $(core-cfgs) +$(obj)/core.o: private rustc_target_flags = --edition=$(core-edition) $(core-cfgs) $(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs \ $(wildcard $(objtree)/include/config/RUSTC_VERSION_TEXT) FORCE +$(call if_changed_rule,rustc_library) ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) $(obj)/core.o: scripts/target.json endif +KCOV_INSTRUMENT_core.o := n +$(obj)/compiler_builtins.o: private skip_gendwarfksyms = 1 $(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*' $(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE +$(call if_changed_rule,rustc_library) +$(obj)/pin_init.o: private skip_gendwarfksyms = 1 +$(obj)/pin_init.o: private rustc_target_flags = --extern pin_init_internal \ + --extern macros --cfg kernel +$(obj)/pin_init.o: $(src)/pin-init/src/lib.rs $(obj)/compiler_builtins.o \ + $(obj)/$(libpin_init_internal_name) $(obj)/$(libmacros_name) FORCE + +$(call if_changed_rule,rustc_library) + +$(obj)/build_error.o: private skip_gendwarfksyms = 1 $(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE +$(call if_changed_rule,rustc_library) +$(obj)/ffi.o: private skip_gendwarfksyms = 1 $(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE +$(call if_changed_rule,rustc_library) @@ -436,15 +536,16 @@ $(obj)/bindings.o: $(src)/bindings/lib.rs \ +$(call if_changed_rule,rustc_library) $(obj)/uapi.o: private rustc_target_flags = --extern ffi +$(obj)/uapi.o: private skip_gendwarfksyms = 1 $(obj)/uapi.o: $(src)/uapi/lib.rs \ $(obj)/ffi.o \ $(obj)/uapi/uapi_generated.rs FORCE +$(call if_changed_rule,rustc_library) -$(obj)/kernel.o: private rustc_target_flags = --extern ffi \ +$(obj)/kernel.o: private rustc_target_flags = --extern ffi --extern pin_init \ --extern build_error --extern macros --extern bindings --extern uapi -$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o \ - $(obj)/libmacros.so $(obj)/bindings.o $(obj)/uapi.o FORCE +$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o $(obj)/pin_init.o \ + $(obj)/$(libmacros_name) $(obj)/bindings.o $(obj)/uapi.o FORCE +$(call if_changed_rule,rustc_library) ifdef CONFIG_JUMP_LABEL |