1 # SPDX-License-Identifier: GPL-2.0 2 3 # Where to place rustdoc generated documentation 4 rustdoc_output := $(objtree)/Documentation/output/rust/rustdoc 5 6 obj-$(CONFIG_RUST) += core.o compiler_builtins.o 7 always-$(CONFIG_RUST) += exports_core_generated.h 8 9 # Missing prototypes are expected in the helpers since these are exported 10 # for Rust only, thus there is no header nor prototypes. 11 obj-$(CONFIG_RUST) += helpers/helpers.o 12 CFLAGS_REMOVE_helpers/helpers.o = -Wmissing-prototypes -Wmissing-declarations 13 14 always-$(CONFIG_RUST) += libmacros.so 15 no-clean-files += libmacros.so 16 17 always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs 18 obj-$(CONFIG_RUST) += alloc.o bindings.o kernel.o 19 always-$(CONFIG_RUST) += exports_alloc_generated.h exports_helpers_generated.h \ 20 exports_bindings_generated.h exports_kernel_generated.h 21 22 always-$(CONFIG_RUST) += uapi/uapi_generated.rs 23 obj-$(CONFIG_RUST) += uapi.o 24 25 ifdef CONFIG_RUST_BUILD_ASSERT_ALLOW 26 obj-$(CONFIG_RUST) += build_error.o 27 else 28 always-$(CONFIG_RUST) += build_error.o 29 endif 30 31 obj-$(CONFIG_RUST) += exports.o 32 33 always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.rs 34 always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.c 35 36 obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.o 37 obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.o 38 39 # Avoids running `$(RUSTC)` for the sysroot when it may not be available. 40 ifdef CONFIG_RUST 41 42 # `$(rust_flags)` is passed in case the user added `--sysroot`. 43 rustc_sysroot := $(shell MAKEFLAGS= $(RUSTC) $(rust_flags) --print sysroot) 44 rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2) 45 RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library 46 47 ifneq ($(quiet),) 48 rust_test_quiet=-q 49 rustdoc_test_quiet=--test-args -q 50 rustdoc_test_kernel_quiet=>/dev/null 51 endif 52 53 core-cfgs = \ 54 --cfg no_fp_fmt_parse 55 56 alloc-cfgs = \ 57 --cfg no_global_oom_handling \ 58 --cfg no_rc \ 59 --cfg no_sync 60 61 quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< 62 cmd_rustdoc = \ 63 OBJTREE=$(abspath $(objtree)) \ 64 $(RUSTDOC) $(if $(rustdoc_host),$(rust_common_flags),$(rust_flags)) \ 65 $(rustc_target_flags) -L$(objtree)/$(obj) \ 66 --output $(rustdoc_output) \ 67 --crate-name $(subst rustdoc-,,$@) \ 68 $(if $(rustdoc_host),,--sysroot=/dev/null) \ 69 @$(objtree)/include/generated/rustc_cfg $< 70 71 # The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute 72 # can be used to specify a custom logo. However: 73 # - The given value is used as-is, thus it cannot be relative or a local file 74 # (unlike the non-custom case) since the generated docs have subfolders. 75 # - It requires adding it to every crate. 76 # - It requires changing `core` which comes from the sysroot. 77 # 78 # Using `-Zcrate-attr` would solve the last two points, but not the first. 79 # The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new 80 # command-like flags to solve the issue. Meanwhile, we use the non-custom case 81 # and then retouch the generated files. 82 rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ 83 rustdoc-alloc rustdoc-kernel 84 $(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/ 85 $(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/ 86 $(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \ 87 -e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \ 88 -e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \ 89 -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \ 90 -e 's:<a href="srctree/([^"]+)">:<a href="$(realpath $(srctree))/\1">:g' 91 $(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \ 92 echo ".logo-container > img { object-fit: contain; }" >> $$f; done 93 94 rustdoc-macros: private rustdoc_host = yes 95 rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ 96 --extern proc_macro 97 rustdoc-macros: $(src)/macros/lib.rs FORCE 98 +$(call if_changed,rustdoc) 99 100 rustdoc-core: private rustc_target_flags = $(core-cfgs) 101 rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE 102 +$(call if_changed,rustdoc) 103 104 rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE 105 +$(call if_changed,rustdoc) 106 107 # We need to allow `rustdoc::broken_intra_doc_links` because some 108 # `no_global_oom_handling` functions refer to non-`no_global_oom_handling` 109 # functions. Ideally `rustdoc` would have a way to distinguish broken links 110 # due to things that are "configured out" vs. entirely non-existing ones. 111 rustdoc-alloc: private rustc_target_flags = $(alloc-cfgs) \ 112 -Arustdoc::broken_intra_doc_links 113 rustdoc-alloc: $(RUST_LIB_SRC)/alloc/src/lib.rs rustdoc-core rustdoc-compiler_builtins FORCE 114 +$(call if_changed,rustdoc) 115 116 rustdoc-kernel: private rustc_target_flags = --extern alloc \ 117 --extern build_error --extern macros=$(objtree)/$(obj)/libmacros.so \ 118 --extern bindings --extern uapi 119 rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-macros \ 120 rustdoc-compiler_builtins rustdoc-alloc $(obj)/libmacros.so \ 121 $(obj)/bindings.o FORCE 122 +$(call if_changed,rustdoc) 123 124 quiet_cmd_rustc_test_library = RUSTC TL $< 125 cmd_rustc_test_library = \ 126 OBJTREE=$(abspath $(objtree)) \ 127 $(RUSTC) $(rust_common_flags) \ 128 @$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \ 129 --crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \ 130 --out-dir $(objtree)/$(obj)/test --cfg testlib \ 131 -L$(objtree)/$(obj)/test \ 132 --crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $< 133 134 rusttestlib-build_error: $(src)/build_error.rs FORCE 135 +$(call if_changed,rustc_test_library) 136 137 rusttestlib-macros: private rustc_target_flags = --extern proc_macro 138 rusttestlib-macros: private rustc_test_library_proc = yes 139 rusttestlib-macros: $(src)/macros/lib.rs FORCE 140 +$(call if_changed,rustc_test_library) 141 142 rusttestlib-bindings: $(src)/bindings/lib.rs FORCE 143 +$(call if_changed,rustc_test_library) 144 145 rusttestlib-uapi: $(src)/uapi/lib.rs FORCE 146 +$(call if_changed,rustc_test_library) 147 148 quiet_cmd_rustdoc_test = RUSTDOC T $< 149 cmd_rustdoc_test = \ 150 OBJTREE=$(abspath $(objtree)) \ 151 $(RUSTDOC) --test $(rust_common_flags) \ 152 @$(objtree)/include/generated/rustc_cfg \ 153 $(rustc_target_flags) $(rustdoc_test_target_flags) \ 154 $(rustdoc_test_quiet) \ 155 -L$(objtree)/$(obj)/test --output $(rustdoc_output) \ 156 --crate-name $(subst rusttest-,,$@) $< 157 158 quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $< 159 cmd_rustdoc_test_kernel = \ 160 rm -rf $(objtree)/$(obj)/test/doctests/kernel; \ 161 mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \ 162 OBJTREE=$(abspath $(objtree)) \ 163 $(RUSTDOC) --test $(rust_flags) \ 164 -L$(objtree)/$(obj) --extern alloc --extern kernel \ 165 --extern build_error --extern macros \ 166 --extern bindings --extern uapi \ 167 --no-run --crate-name kernel -Zunstable-options \ 168 --sysroot=/dev/null \ 169 --test-builder $(objtree)/scripts/rustdoc_test_builder \ 170 $< $(rustdoc_test_kernel_quiet); \ 171 $(objtree)/scripts/rustdoc_test_gen 172 173 %/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \ 174 $(src)/kernel/lib.rs $(obj)/kernel.o \ 175 $(objtree)/scripts/rustdoc_test_builder \ 176 $(objtree)/scripts/rustdoc_test_gen FORCE 177 +$(call if_changed,rustdoc_test_kernel) 178 179 # We cannot use `-Zpanic-abort-tests` because some tests are dynamic, 180 # so for the moment we skip `-Cpanic=abort`. 181 quiet_cmd_rustc_test = RUSTC T $< 182 cmd_rustc_test = \ 183 OBJTREE=$(abspath $(objtree)) \ 184 $(RUSTC) --test $(rust_common_flags) \ 185 @$(objtree)/include/generated/rustc_cfg \ 186 $(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \ 187 -L$(objtree)/$(obj)/test \ 188 --crate-name $(subst rusttest-,,$@) $<; \ 189 $(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \ 190 $(rustc_test_run_flags) 191 192 rusttest: rusttest-macros rusttest-kernel 193 194 rusttest-macros: private rustc_target_flags = --extern proc_macro 195 rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro 196 rusttest-macros: $(src)/macros/lib.rs FORCE 197 +$(call if_changed,rustc_test) 198 +$(call if_changed,rustdoc_test) 199 200 rusttest-kernel: private rustc_target_flags = --extern alloc \ 201 --extern build_error --extern macros --extern bindings --extern uapi 202 rusttest-kernel: $(src)/kernel/lib.rs \ 203 rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \ 204 rusttestlib-uapi FORCE 205 +$(call if_changed,rustc_test) 206 +$(call if_changed,rustc_test_library) 207 208 ifdef CONFIG_CC_IS_CLANG 209 bindgen_c_flags = $(c_flags) 210 else 211 # bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC 212 # plugin backend and/or the Clang driver would be perfectly compatible with GCC. 213 # 214 # For the moment, here we are tweaking the flags on the fly. This is a hack, 215 # and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT` 216 # if we end up using one of those structs). 217 bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ 218 -mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \ 219 -mindirect-branch=thunk-extern -mindirect-branch-register \ 220 -mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \ 221 -mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \ 222 -mno-pointers-to-nested-functions -mno-string \ 223 -mno-strict-align -mstrict-align \ 224 -fconserve-stack -falign-jumps=% -falign-loops=% \ 225 -femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \ 226 -fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \ 227 -fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \ 228 -fzero-call-used-regs=% -fno-stack-clash-protection \ 229 -fno-inline-functions-called-once -fsanitize=bounds-strict \ 230 -fstrict-flex-arrays=% -fmin-function-alignment=% \ 231 --param=% --param asan-% 232 233 # Derived from `scripts/Makefile.clang`. 234 BINDGEN_TARGET_x86 := x86_64-linux-gnu 235 BINDGEN_TARGET_arm64 := aarch64-linux-gnu 236 BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) 237 238 # All warnings are inhibited since GCC builds are very experimental, 239 # many GCC warnings are not supported by Clang, they may only appear in 240 # some configurations, with new GCC versions, etc. 241 bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET) 242 243 # Auto variable zero-initialization requires an additional special option with 244 # clang that is going to be removed sometime in the future (likely in 245 # clang-18), so make sure to pass this option only if clang supports it 246 # (libclang major version < 16). 247 # 248 # https://github.com/llvm/llvm-project/issues/44842 249 # https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags 250 ifdef CONFIG_INIT_STACK_ALL_ZERO 251 libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p') 252 ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1) 253 bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 254 endif 255 endif 256 257 bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \ 258 $(bindgen_extra_c_flags) 259 endif 260 261 ifdef CONFIG_LTO 262 bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags)) 263 else 264 bindgen_c_flags_lto = $(bindgen_c_flags) 265 endif 266 267 bindgen_c_flags_final = $(bindgen_c_flags_lto) -D__BINDGEN__ 268 269 quiet_cmd_bindgen = BINDGEN $@ 270 cmd_bindgen = \ 271 $(BINDGEN) $< $(bindgen_target_flags) \ 272 --use-core --with-derive-default --ctypes-prefix core::ffi --no-layout-tests \ 273 --no-debug '.*' \ 274 -o $@ -- $(bindgen_c_flags_final) -DMODULE \ 275 $(bindgen_target_cflags) $(bindgen_target_extra) 276 277 $(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \ 278 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 279 $(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \ 280 sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@ 281 $(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \ 282 $(src)/bindgen_parameters FORCE 283 $(call if_changed_dep,bindgen) 284 285 $(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \ 286 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 287 $(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \ 288 $(src)/bindgen_parameters FORCE 289 $(call if_changed_dep,bindgen) 290 291 # See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn 292 # with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here 293 # given it is `libclang`; but for consistency, future Clang changes and/or 294 # a potential future GCC backend for `bindgen`, we disable it too. 295 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \ 296 --blocklist-type '.*' --allowlist-var '' \ 297 --allowlist-function 'rust_helper_.*' 298 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \ 299 -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations 300 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \ 301 sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n pub fn \1/g' $@ 302 $(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE 303 $(call if_changed_dep,bindgen) 304 305 quiet_cmd_exports = EXPORTS $@ 306 cmd_exports = \ 307 $(NM) -p --defined-only $< \ 308 | awk '/ (T|R|D|B) / {printf "EXPORT_SYMBOL_RUST_GPL(%s);\n",$$3}' > $@ 309 310 $(obj)/exports_core_generated.h: $(obj)/core.o FORCE 311 $(call if_changed,exports) 312 313 $(obj)/exports_alloc_generated.h: $(obj)/alloc.o FORCE 314 $(call if_changed,exports) 315 316 # Even though Rust kernel modules should never use the bindings directly, 317 # symbols from the `bindings` crate and the C helpers need to be exported 318 # because Rust generics and inlined functions may not get their code generated 319 # in the crate where they are defined. Other helpers, called from non-inline 320 # functions, may not be exported, in principle. However, in general, the Rust 321 # compiler does not guarantee codegen will be performed for a non-inline 322 # function either. Therefore, we export all symbols from helpers and bindings. 323 # In the future, this may be revisited to reduce the number of exports after 324 # the compiler is informed about the places codegen is required. 325 $(obj)/exports_helpers_generated.h: $(obj)/helpers/helpers.o FORCE 326 $(call if_changed,exports) 327 328 $(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE 329 $(call if_changed,exports) 330 331 $(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE 332 $(call if_changed,exports) 333 334 quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ 335 cmd_rustc_procmacro = \ 336 $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ 337 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ 338 -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \ 339 --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ 340 --crate-type proc-macro \ 341 --crate-name $(patsubst lib%.so,%,$(notdir $@)) $< 342 343 # Procedural macros can only be used with the `rustc` that compiled it. 344 # Therefore, to get `libmacros.so` automatically recompiled when the compiler 345 # version changes, we add `core.o` as a dependency (even if it is not needed). 346 $(obj)/libmacros.so: $(src)/macros/lib.rs $(obj)/core.o FORCE 347 +$(call if_changed_dep,rustc_procmacro) 348 349 quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ 350 cmd_rustc_library = \ 351 OBJTREE=$(abspath $(objtree)) \ 352 $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ 353 $(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ 354 --emit=dep-info=$(depfile) --emit=obj=$@ \ 355 --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \ 356 --crate-type rlib -L$(objtree)/$(obj) \ 357 --crate-name $(patsubst %.o,%,$(notdir $@)) $< \ 358 --sysroot=/dev/null \ 359 $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) 360 361 rust-analyzer: 362 $(Q)$(srctree)/scripts/generate_rust_analyzer.py \ 363 --cfgs='core=$(core-cfgs)' --cfgs='alloc=$(alloc-cfgs)' \ 364 $(realpath $(srctree)) $(realpath $(objtree)) \ 365 $(rustc_sysroot) $(RUST_LIB_SRC) $(KBUILD_EXTMOD) > \ 366 $(if $(KBUILD_EXTMOD),$(extmod_prefix),$(objtree))/rust-project.json 367 368 redirect-intrinsics = \ 369 __addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \ 370 __adddf3 __eqdf2 __ledf2 __ltdf2 __muldf3 __unorddf2 \ 371 __muloti4 __multi3 \ 372 __udivmodti4 __udivti3 __umodti3 373 374 ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) 375 # These intrinsics are defined for ARM64 and RISCV64 376 redirect-intrinsics += \ 377 __ashrti3 \ 378 __ashlti3 __lshrti3 379 endif 380 381 $(obj)/core.o: private skip_clippy = 1 382 $(obj)/core.o: private skip_flags = -Wunreachable_pub 383 $(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym)) 384 $(obj)/core.o: private rustc_target_flags = $(core-cfgs) 385 $(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs FORCE 386 +$(call if_changed_dep,rustc_library) 387 ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) 388 $(obj)/core.o: scripts/target.json 389 endif 390 391 $(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*' 392 $(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE 393 +$(call if_changed_dep,rustc_library) 394 395 $(obj)/alloc.o: private skip_clippy = 1 396 $(obj)/alloc.o: private skip_flags = -Wunreachable_pub 397 $(obj)/alloc.o: private rustc_target_flags = $(alloc-cfgs) 398 $(obj)/alloc.o: $(RUST_LIB_SRC)/alloc/src/lib.rs $(obj)/compiler_builtins.o FORCE 399 +$(call if_changed_dep,rustc_library) 400 401 $(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE 402 +$(call if_changed_dep,rustc_library) 403 404 $(obj)/bindings.o: $(src)/bindings/lib.rs \ 405 $(obj)/compiler_builtins.o \ 406 $(obj)/bindings/bindings_generated.rs \ 407 $(obj)/bindings/bindings_helpers_generated.rs FORCE 408 +$(call if_changed_dep,rustc_library) 409 410 $(obj)/uapi.o: $(src)/uapi/lib.rs \ 411 $(obj)/compiler_builtins.o \ 412 $(obj)/uapi/uapi_generated.rs FORCE 413 +$(call if_changed_dep,rustc_library) 414 415 $(obj)/kernel.o: private rustc_target_flags = --extern alloc \ 416 --extern build_error --extern macros --extern bindings --extern uapi 417 $(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/alloc.o $(obj)/build_error.o \ 418 $(obj)/libmacros.so $(obj)/bindings.o $(obj)/uapi.o FORCE 419 +$(call if_changed_dep,rustc_library) 420 421 endif # CONFIG_RUST
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