1# SPDX-License-Identifier: GPL-2.0 2 3# Where to place rustdoc generated documentation 4rustdoc_output := $(objtree)/Documentation/output/rust/rustdoc 5 6obj-$(CONFIG_RUST) += core.o compiler_builtins.o ffi.o 7always-$(CONFIG_RUST) += exports_core_generated.h 8 9# Missing prototypes are expected in the helpers since these are exported 10# for Rust only, thus there is no header nor prototypes. 11obj-$(CONFIG_RUST) += helpers/helpers.o 12CFLAGS_REMOVE_helpers/helpers.o = -Wmissing-prototypes -Wmissing-declarations 13 14always-$(CONFIG_RUST) += libmacros.so 15no-clean-files += libmacros.so 16 17always-$(CONFIG_RUST) += bindings/bindings_generated.rs bindings/bindings_helpers_generated.rs 18obj-$(CONFIG_RUST) += bindings.o kernel.o 19always-$(CONFIG_RUST) += exports_helpers_generated.h \ 20 exports_bindings_generated.h exports_kernel_generated.h 21 22always-$(CONFIG_RUST) += uapi/uapi_generated.rs 23obj-$(CONFIG_RUST) += uapi.o 24 25ifdef CONFIG_RUST_BUILD_ASSERT_ALLOW 26obj-$(CONFIG_RUST) += build_error.o 27else 28always-$(CONFIG_RUST) += build_error.o 29endif 30 31obj-$(CONFIG_RUST) += exports.o 32 33always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.rs 34always-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.c 35 36obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated.o 37obj-$(CONFIG_RUST_KERNEL_DOCTESTS) += doctests_kernel_generated_kunit.o 38 39always-$(subst y,$(CONFIG_RUST),$(CONFIG_JUMP_LABEL)) += kernel/generated_arch_static_branch_asm.rs 40 41# Avoids running `$(RUSTC)` for the sysroot when it may not be available. 42ifdef CONFIG_RUST 43 44# `$(rust_flags)` is passed in case the user added `--sysroot`. 45rustc_sysroot := $(shell MAKEFLAGS= $(RUSTC) $(rust_flags) --print sysroot) 46rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2) 47RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library 48 49ifneq ($(quiet),) 50rust_test_quiet=-q 51rustdoc_test_quiet=--test-args -q 52rustdoc_test_kernel_quiet=>/dev/null 53endif 54 55core-cfgs = \ 56 --cfg no_fp_fmt_parse 57 58quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $< 59 cmd_rustdoc = \ 60 OBJTREE=$(abspath $(objtree)) \ 61 $(RUSTDOC) $(filter-out $(skip_flags),$(if $(rustdoc_host),$(rust_common_flags),$(rust_flags))) \ 62 $(rustc_target_flags) -L$(objtree)/$(obj) \ 63 -Zunstable-options --generate-link-to-definition \ 64 --output $(rustdoc_output) \ 65 --crate-name $(subst rustdoc-,,$@) \ 66 $(if $(rustdoc_host),,--sysroot=/dev/null) \ 67 @$(objtree)/include/generated/rustc_cfg $< 68 69# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute 70# can be used to specify a custom logo. However: 71# - The given value is used as-is, thus it cannot be relative or a local file 72# (unlike the non-custom case) since the generated docs have subfolders. 73# - It requires adding it to every crate. 74# - It requires changing `core` which comes from the sysroot. 75# 76# Using `-Zcrate-attr` would solve the last two points, but not the first. 77# The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new 78# command-like flags to solve the issue. Meanwhile, we use the non-custom case 79# and then retouch the generated files. 80rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ 81 rustdoc-kernel 82 $(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/ 83 $(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/ 84 $(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \ 85 -e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \ 86 -e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \ 87 -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \ 88 -e 's:<a href="srctree/([^"]+)">:<a href="$(realpath $(srctree))/\1">:g' 89 $(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \ 90 echo ".logo-container > img { object-fit: contain; }" >> $$f; done 91 92rustdoc-macros: private rustdoc_host = yes 93rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ 94 --extern proc_macro 95rustdoc-macros: $(src)/macros/lib.rs FORCE 96 +$(call if_changed,rustdoc) 97 98# Starting with Rust 1.82.0, skipping `-Wrustdoc::unescaped_backticks` should 99# not be needed -- see https://github.com/rust-lang/rust/pull/128307. 100rustdoc-core: private skip_flags = -Wrustdoc::unescaped_backticks 101rustdoc-core: private rustc_target_flags = $(core-cfgs) 102rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE 103 +$(call if_changed,rustdoc) 104 105rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE 106 +$(call if_changed,rustdoc) 107 108rustdoc-ffi: $(src)/ffi.rs rustdoc-core FORCE 109 +$(call if_changed,rustdoc) 110 111rustdoc-kernel: private rustc_target_flags = --extern ffi \ 112 --extern build_error --extern macros=$(objtree)/$(obj)/libmacros.so \ 113 --extern bindings --extern uapi 114rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \ 115 rustdoc-compiler_builtins $(obj)/libmacros.so \ 116 $(obj)/bindings.o FORCE 117 +$(call if_changed,rustdoc) 118 119quiet_cmd_rustc_test_library = RUSTC TL $< 120 cmd_rustc_test_library = \ 121 OBJTREE=$(abspath $(objtree)) \ 122 $(RUSTC) $(rust_common_flags) \ 123 @$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \ 124 --crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \ 125 --out-dir $(objtree)/$(obj)/test --cfg testlib \ 126 -L$(objtree)/$(obj)/test \ 127 --crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $< 128 129rusttestlib-build_error: $(src)/build_error.rs FORCE 130 +$(call if_changed,rustc_test_library) 131 132rusttestlib-ffi: $(src)/ffi.rs FORCE 133 +$(call if_changed,rustc_test_library) 134 135rusttestlib-macros: private rustc_target_flags = --extern proc_macro 136rusttestlib-macros: private rustc_test_library_proc = yes 137rusttestlib-macros: $(src)/macros/lib.rs FORCE 138 +$(call if_changed,rustc_test_library) 139 140rusttestlib-kernel: private rustc_target_flags = --extern ffi \ 141 --extern build_error --extern macros \ 142 --extern bindings --extern uapi 143rusttestlib-kernel: $(src)/kernel/lib.rs \ 144 rusttestlib-bindings rusttestlib-uapi rusttestlib-build_error \ 145 $(obj)/libmacros.so $(obj)/bindings.o FORCE 146 +$(call if_changed,rustc_test_library) 147 148rusttestlib-bindings: private rustc_target_flags = --extern ffi 149rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi FORCE 150 +$(call if_changed,rustc_test_library) 151 152rusttestlib-uapi: private rustc_target_flags = --extern ffi 153rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi FORCE 154 +$(call if_changed,rustc_test_library) 155 156quiet_cmd_rustdoc_test = RUSTDOC T $< 157 cmd_rustdoc_test = \ 158 RUST_MODFILE=test.rs \ 159 OBJTREE=$(abspath $(objtree)) \ 160 $(RUSTDOC) --test $(rust_common_flags) \ 161 @$(objtree)/include/generated/rustc_cfg \ 162 $(rustc_target_flags) $(rustdoc_test_target_flags) \ 163 $(rustdoc_test_quiet) \ 164 -L$(objtree)/$(obj)/test --output $(rustdoc_output) \ 165 --crate-name $(subst rusttest-,,$@) $< 166 167quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $< 168 cmd_rustdoc_test_kernel = \ 169 rm -rf $(objtree)/$(obj)/test/doctests/kernel; \ 170 mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \ 171 OBJTREE=$(abspath $(objtree)) \ 172 $(RUSTDOC) --test $(rust_flags) \ 173 -L$(objtree)/$(obj) --extern ffi --extern kernel \ 174 --extern build_error --extern macros \ 175 --extern bindings --extern uapi \ 176 --no-run --crate-name kernel -Zunstable-options \ 177 --sysroot=/dev/null \ 178 --test-builder $(objtree)/scripts/rustdoc_test_builder \ 179 $< $(rustdoc_test_kernel_quiet); \ 180 $(objtree)/scripts/rustdoc_test_gen 181 182%/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \ 183 $(src)/kernel/lib.rs $(obj)/kernel.o \ 184 $(objtree)/scripts/rustdoc_test_builder \ 185 $(objtree)/scripts/rustdoc_test_gen FORCE 186 +$(call if_changed,rustdoc_test_kernel) 187 188# We cannot use `-Zpanic-abort-tests` because some tests are dynamic, 189# so for the moment we skip `-Cpanic=abort`. 190quiet_cmd_rustc_test = RUSTC T $< 191 cmd_rustc_test = \ 192 OBJTREE=$(abspath $(objtree)) \ 193 $(RUSTC) --test $(rust_common_flags) \ 194 @$(objtree)/include/generated/rustc_cfg \ 195 $(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \ 196 -L$(objtree)/$(obj)/test \ 197 --crate-name $(subst rusttest-,,$@) $<; \ 198 $(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \ 199 $(rustc_test_run_flags) 200 201rusttest: rusttest-macros rusttest-kernel 202 203rusttest-macros: private rustc_target_flags = --extern proc_macro \ 204 --extern macros --extern kernel 205rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro 206rusttest-macros: $(src)/macros/lib.rs \ 207 rusttestlib-macros rusttestlib-kernel FORCE 208 +$(call if_changed,rustc_test) 209 +$(call if_changed,rustdoc_test) 210 211rusttest-kernel: private rustc_target_flags = --extern ffi \ 212 --extern build_error --extern macros --extern bindings --extern uapi 213rusttest-kernel: $(src)/kernel/lib.rs rusttestlib-ffi rusttestlib-kernel \ 214 rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \ 215 rusttestlib-uapi FORCE 216 +$(call if_changed,rustc_test) 217 218ifdef CONFIG_CC_IS_CLANG 219bindgen_c_flags = $(c_flags) 220else 221# bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC 222# plugin backend and/or the Clang driver would be perfectly compatible with GCC. 223# 224# For the moment, here we are tweaking the flags on the fly. This is a hack, 225# and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT` 226# if we end up using one of those structs). 227bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \ 228 -mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \ 229 -mindirect-branch=thunk-extern -mindirect-branch-register \ 230 -mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \ 231 -mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \ 232 -mno-pointers-to-nested-functions -mno-string \ 233 -mno-strict-align -mstrict-align \ 234 -fconserve-stack -falign-jumps=% -falign-loops=% \ 235 -femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \ 236 -fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \ 237 -fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \ 238 -fzero-call-used-regs=% -fno-stack-clash-protection \ 239 -fno-inline-functions-called-once -fsanitize=bounds-strict \ 240 -fstrict-flex-arrays=% -fmin-function-alignment=% \ 241 --param=% --param asan-% 242 243# Derived from `scripts/Makefile.clang`. 244BINDGEN_TARGET_x86 := x86_64-linux-gnu 245BINDGEN_TARGET_arm64 := aarch64-linux-gnu 246BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) 247 248# All warnings are inhibited since GCC builds are very experimental, 249# many GCC warnings are not supported by Clang, they may only appear in 250# some configurations, with new GCC versions, etc. 251bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET) 252 253# Auto variable zero-initialization requires an additional special option with 254# clang that is going to be removed sometime in the future (likely in 255# clang-18), so make sure to pass this option only if clang supports it 256# (libclang major version < 16). 257# 258# https://github.com/llvm/llvm-project/issues/44842 259# https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags 260ifdef CONFIG_INIT_STACK_ALL_ZERO 261libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p') 262ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1) 263bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang 264endif 265endif 266 267bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \ 268 $(bindgen_extra_c_flags) 269endif 270 271ifdef CONFIG_LTO 272bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags)) 273else 274bindgen_c_flags_lto = $(bindgen_c_flags) 275endif 276 277# `-fno-builtin` is passed to avoid `bindgen` from using `clang` builtin 278# prototypes for functions like `memcpy` -- if this flag is not passed, 279# `bindgen`-generated prototypes use `c_ulong` or `c_uint` depending on 280# architecture instead of generating `usize`. 281bindgen_c_flags_final = $(bindgen_c_flags_lto) -fno-builtin -D__BINDGEN__ 282 283# Each `bindgen` release may upgrade the list of Rust target versions. By 284# default, the highest stable release in their list is used. Thus we need to set 285# a `--rust-target` to avoid future `bindgen` releases emitting code that 286# `rustc` may not understand. On top of that, `bindgen` does not support passing 287# an unknown Rust target version. 288# 289# Therefore, the Rust target for `bindgen` can be only as high as the minimum 290# Rust version the kernel supports and only as high as the greatest stable Rust 291# target supported by the minimum `bindgen` version the kernel supports (that 292# is, if we do not test the actual `rustc`/`bindgen` versions running). 293# 294# Starting with `bindgen` 0.71.0, we will be able to set any future Rust version 295# instead, i.e. we will be able to set here our minimum supported Rust version. 296quiet_cmd_bindgen = BINDGEN $@ 297 cmd_bindgen = \ 298 $(BINDGEN) $< $(bindgen_target_flags) --rust-target 1.68 \ 299 --use-core --with-derive-default --ctypes-prefix ffi --no-layout-tests \ 300 --no-debug '.*' --enable-function-attribute-detection \ 301 -o $@ -- $(bindgen_c_flags_final) -DMODULE \ 302 $(bindgen_target_cflags) $(bindgen_target_extra) 303 304$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \ 305 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 306$(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \ 307 sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@ 308$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \ 309 $(src)/bindgen_parameters FORCE 310 $(call if_changed_dep,bindgen) 311 312$(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \ 313 $(shell grep -Ev '^#|^$$' $(src)/bindgen_parameters) 314$(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \ 315 $(src)/bindgen_parameters FORCE 316 $(call if_changed_dep,bindgen) 317 318# See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn 319# with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here 320# given it is `libclang`; but for consistency, future Clang changes and/or 321# a potential future GCC backend for `bindgen`, we disable it too. 322$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \ 323 --blocklist-type '.*' --allowlist-var '' \ 324 --allowlist-function 'rust_helper_.*' 325$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \ 326 -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations 327$(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \ 328 sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n pub fn \1/g' $@ 329$(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers/helpers.c FORCE 330 $(call if_changed_dep,bindgen) 331 332quiet_cmd_exports = EXPORTS $@ 333 cmd_exports = \ 334 $(NM) -p --defined-only $< \ 335 | awk '$$2~/(T|R|D|B)/ && $$3!~/__cfi/ {printf "EXPORT_SYMBOL_RUST_GPL(%s);\n",$$3}' > $@ 336 337$(obj)/exports_core_generated.h: $(obj)/core.o FORCE 338 $(call if_changed,exports) 339 340# Even though Rust kernel modules should never use the bindings directly, 341# symbols from the `bindings` crate and the C helpers need to be exported 342# because Rust generics and inlined functions may not get their code generated 343# in the crate where they are defined. Other helpers, called from non-inline 344# functions, may not be exported, in principle. However, in general, the Rust 345# compiler does not guarantee codegen will be performed for a non-inline 346# function either. Therefore, we export all symbols from helpers and bindings. 347# In the future, this may be revisited to reduce the number of exports after 348# the compiler is informed about the places codegen is required. 349$(obj)/exports_helpers_generated.h: $(obj)/helpers/helpers.o FORCE 350 $(call if_changed,exports) 351 352$(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE 353 $(call if_changed,exports) 354 355$(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE 356 $(call if_changed,exports) 357 358quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ 359 cmd_rustc_procmacro = \ 360 $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ 361 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ 362 -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \ 363 --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ 364 --crate-type proc-macro \ 365 --crate-name $(patsubst lib%.so,%,$(notdir $@)) $< 366 367# Procedural macros can only be used with the `rustc` that compiled it. 368$(obj)/libmacros.so: $(src)/macros/lib.rs FORCE 369 +$(call if_changed_dep,rustc_procmacro) 370 371quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@ 372 cmd_rustc_library = \ 373 OBJTREE=$(abspath $(objtree)) \ 374 $(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \ 375 $(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \ 376 --emit=dep-info=$(depfile) --emit=obj=$@ \ 377 --emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \ 378 --crate-type rlib -L$(objtree)/$(obj) \ 379 --crate-name $(patsubst %.o,%,$(notdir $@)) $< \ 380 --sysroot=/dev/null \ 381 $(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@) \ 382 $(cmd_objtool) 383 384rust-analyzer: 385 $(Q)$(srctree)/scripts/generate_rust_analyzer.py \ 386 --cfgs='core=$(core-cfgs)' \ 387 $(realpath $(srctree)) $(realpath $(objtree)) \ 388 $(rustc_sysroot) $(RUST_LIB_SRC) $(if $(KBUILD_EXTMOD),$(srcroot)) \ 389 > rust-project.json 390 391redirect-intrinsics = \ 392 __addsf3 __eqsf2 __extendsfdf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __truncdfsf2 __unordsf2 \ 393 __adddf3 __eqdf2 __ledf2 __ltdf2 __muldf3 __unorddf2 \ 394 __muloti4 __multi3 \ 395 __udivmodti4 __udivti3 __umodti3 396 397ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) 398 # These intrinsics are defined for ARM64 and RISCV64 399 redirect-intrinsics += \ 400 __ashrti3 \ 401 __ashlti3 __lshrti3 402endif 403 404define rule_rustc_library 405 $(call cmd_and_fixdep,rustc_library) 406 $(call cmd,gen_objtooldep) 407endef 408 409$(obj)/core.o: private skip_clippy = 1 410$(obj)/core.o: private skip_flags = -Wunreachable_pub 411$(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym)) 412$(obj)/core.o: private rustc_target_flags = $(core-cfgs) 413$(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs \ 414 $(wildcard $(objtree)/include/config/RUSTC_VERSION_TEXT) FORCE 415 +$(call if_changed_rule,rustc_library) 416ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) 417$(obj)/core.o: scripts/target.json 418endif 419 420$(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*' 421$(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE 422 +$(call if_changed_rule,rustc_library) 423 424$(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE 425 +$(call if_changed_rule,rustc_library) 426 427$(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE 428 +$(call if_changed_rule,rustc_library) 429 430$(obj)/bindings.o: private rustc_target_flags = --extern ffi 431$(obj)/bindings.o: $(src)/bindings/lib.rs \ 432 $(obj)/ffi.o \ 433 $(obj)/bindings/bindings_generated.rs \ 434 $(obj)/bindings/bindings_helpers_generated.rs FORCE 435 +$(call if_changed_rule,rustc_library) 436 437$(obj)/uapi.o: private rustc_target_flags = --extern ffi 438$(obj)/uapi.o: $(src)/uapi/lib.rs \ 439 $(obj)/ffi.o \ 440 $(obj)/uapi/uapi_generated.rs FORCE 441 +$(call if_changed_rule,rustc_library) 442 443$(obj)/kernel.o: private rustc_target_flags = --extern ffi \ 444 --extern build_error --extern macros --extern bindings --extern uapi 445$(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/build_error.o \ 446 $(obj)/libmacros.so $(obj)/bindings.o $(obj)/uapi.o FORCE 447 +$(call if_changed_rule,rustc_library) 448 449ifdef CONFIG_JUMP_LABEL 450$(obj)/kernel.o: $(obj)/kernel/generated_arch_static_branch_asm.rs 451endif 452 453endif # CONFIG_RUST 454
