xref: /openbmc/linux/rust/Makefile (revision ca2478a7d974f38d29d27acb42a952c7f168916e)
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.o
12 CFLAGS_REMOVE_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_bindings_generated.h \
20     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 $(RUSTC) $(rust_flags) --print sysroot)
44 rustc_host_target := $(shell $(RUSTC) --version --verbose | grep -F 'host: ' | cut -d' ' -f2)
45 RUST_LIB_SRC ?= $(rustc_sysroot)/lib/rustlib/src/rust/library
46 
47 ifeq ($(quiet),silent_)
48 cargo_quiet=-q
49 rust_test_quiet=-q
50 rustdoc_test_quiet=--test-args -q
51 rustdoc_test_kernel_quiet=>/dev/null
52 else ifeq ($(quiet),quiet_)
53 rust_test_quiet=-q
54 rustdoc_test_quiet=--test-args -q
55 rustdoc_test_kernel_quiet=>/dev/null
56 else
57 cargo_quiet=--verbose
58 endif
59 
60 core-cfgs = \
61     --cfg no_fp_fmt_parse
62 
63 alloc-cfgs = \
64     --cfg no_borrow \
65     --cfg no_fmt \
66     --cfg no_global_oom_handling \
67     --cfg no_macros \
68     --cfg no_rc \
69     --cfg no_str \
70     --cfg no_string \
71     --cfg no_sync \
72     --cfg no_thin
73 
74 quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
75       cmd_rustdoc = \
76 	OBJTREE=$(abspath $(objtree)) \
77 	$(RUSTDOC) $(if $(rustdoc_host),$(rust_common_flags),$(rust_flags)) \
78 		$(rustc_target_flags) -L$(objtree)/$(obj) \
79 		--output $(rustdoc_output) \
80 		--crate-name $(subst rustdoc-,,$@) \
81 		@$(objtree)/include/generated/rustc_cfg $<
82 
83 # The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute
84 # can be used to specify a custom logo. However:
85 #   - The given value is used as-is, thus it cannot be relative or a local file
86 #     (unlike the non-custom case) since the generated docs have subfolders.
87 #   - It requires adding it to every crate.
88 #   - It requires changing `core` which comes from the sysroot.
89 #
90 # Using `-Zcrate-attr` would solve the last two points, but not the first.
91 # The https://github.com/rust-lang/rfcs/pull/3226 RFC suggests two new
92 # command-like flags to solve the issue. Meanwhile, we use the non-custom case
93 # and then retouch the generated files.
94 rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \
95     rustdoc-alloc rustdoc-kernel
96 	$(Q)cp $(srctree)/Documentation/images/logo.svg $(rustdoc_output)/static.files/
97 	$(Q)cp $(srctree)/Documentation/images/COPYING-logo $(rustdoc_output)/static.files/
98 	$(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \
99 		-e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \
100 		-e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \
101 		-e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g'
102 	$(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \
103 		echo ".logo-container > img { object-fit: contain; }" >> $$f; done
104 
105 rustdoc-macros: private rustdoc_host = yes
106 rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \
107     --extern proc_macro
108 rustdoc-macros: $(src)/macros/lib.rs FORCE
109 	$(call if_changed,rustdoc)
110 
111 rustdoc-core: private rustc_target_flags = $(core-cfgs)
112 rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE
113 	$(call if_changed,rustdoc)
114 
115 rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE
116 	$(call if_changed,rustdoc)
117 
118 # We need to allow `rustdoc::broken_intra_doc_links` because some
119 # `no_global_oom_handling` functions refer to non-`no_global_oom_handling`
120 # functions. Ideally `rustdoc` would have a way to distinguish broken links
121 # due to things that are "configured out" vs. entirely non-existing ones.
122 rustdoc-alloc: private rustc_target_flags = $(alloc-cfgs) \
123     -Arustdoc::broken_intra_doc_links
124 rustdoc-alloc: $(src)/alloc/lib.rs rustdoc-core rustdoc-compiler_builtins FORCE
125 	$(call if_changed,rustdoc)
126 
127 rustdoc-kernel: private rustc_target_flags = --extern alloc \
128     --extern build_error --extern macros=$(objtree)/$(obj)/libmacros.so \
129     --extern bindings --extern uapi
130 rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-macros \
131     rustdoc-compiler_builtins rustdoc-alloc $(obj)/libmacros.so \
132     $(obj)/bindings.o FORCE
133 	$(call if_changed,rustdoc)
134 
135 quiet_cmd_rustc_test_library = RUSTC TL $<
136       cmd_rustc_test_library = \
137 	OBJTREE=$(abspath $(objtree)) \
138 	$(RUSTC) $(rust_common_flags) \
139 		@$(objtree)/include/generated/rustc_cfg $(rustc_target_flags) \
140 		--crate-type $(if $(rustc_test_library_proc),proc-macro,rlib) \
141 		--out-dir $(objtree)/$(obj)/test --cfg testlib \
142 		--sysroot $(objtree)/$(obj)/test/sysroot \
143 		-L$(objtree)/$(obj)/test \
144 		--crate-name $(subst rusttest-,,$(subst rusttestlib-,,$@)) $<
145 
146 rusttestlib-build_error: $(src)/build_error.rs rusttest-prepare FORCE
147 	$(call if_changed,rustc_test_library)
148 
149 rusttestlib-macros: private rustc_target_flags = --extern proc_macro
150 rusttestlib-macros: private rustc_test_library_proc = yes
151 rusttestlib-macros: $(src)/macros/lib.rs rusttest-prepare FORCE
152 	$(call if_changed,rustc_test_library)
153 
154 rusttestlib-bindings: $(src)/bindings/lib.rs rusttest-prepare FORCE
155 	$(call if_changed,rustc_test_library)
156 
157 rusttestlib-uapi: $(src)/uapi/lib.rs rusttest-prepare FORCE
158 	$(call if_changed,rustc_test_library)
159 
160 quiet_cmd_rustdoc_test = RUSTDOC T $<
161       cmd_rustdoc_test = \
162 	OBJTREE=$(abspath $(objtree)) \
163 	$(RUSTDOC) --test $(rust_common_flags) \
164 		@$(objtree)/include/generated/rustc_cfg \
165 		$(rustc_target_flags) $(rustdoc_test_target_flags) \
166 		--sysroot $(objtree)/$(obj)/test/sysroot $(rustdoc_test_quiet) \
167 		-L$(objtree)/$(obj)/test --output $(rustdoc_output) \
168 		--crate-name $(subst rusttest-,,$@) $<
169 
170 quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $<
171       cmd_rustdoc_test_kernel = \
172 	rm -rf $(objtree)/$(obj)/test/doctests/kernel; \
173 	mkdir -p $(objtree)/$(obj)/test/doctests/kernel; \
174 	OBJTREE=$(abspath $(objtree)) \
175 	$(RUSTDOC) --test $(rust_flags) \
176 		-L$(objtree)/$(obj) --extern alloc --extern kernel \
177 		--extern build_error --extern macros \
178 		--extern bindings --extern uapi \
179 		--no-run --crate-name kernel -Zunstable-options \
180 		--test-builder $(objtree)/scripts/rustdoc_test_builder \
181 		$< $(rustdoc_test_kernel_quiet); \
182 	$(objtree)/scripts/rustdoc_test_gen
183 
184 %/doctests_kernel_generated.rs %/doctests_kernel_generated_kunit.c: \
185     $(src)/kernel/lib.rs $(obj)/kernel.o \
186     $(objtree)/scripts/rustdoc_test_builder \
187     $(objtree)/scripts/rustdoc_test_gen FORCE
188 	$(call if_changed,rustdoc_test_kernel)
189 
190 # We cannot use `-Zpanic-abort-tests` because some tests are dynamic,
191 # so for the moment we skip `-Cpanic=abort`.
192 quiet_cmd_rustc_test = RUSTC T  $<
193       cmd_rustc_test = \
194 	OBJTREE=$(abspath $(objtree)) \
195 	$(RUSTC) --test $(rust_common_flags) \
196 		@$(objtree)/include/generated/rustc_cfg \
197 		$(rustc_target_flags) --out-dir $(objtree)/$(obj)/test \
198 		--sysroot $(objtree)/$(obj)/test/sysroot \
199 		-L$(objtree)/$(obj)/test \
200 		--crate-name $(subst rusttest-,,$@) $<; \
201 	$(objtree)/$(obj)/test/$(subst rusttest-,,$@) $(rust_test_quiet) \
202 		$(rustc_test_run_flags)
203 
204 rusttest: rusttest-macros rusttest-kernel
205 
206 # This prepares a custom sysroot with our custom `alloc` instead of
207 # the standard one.
208 #
209 # This requires several hacks:
210 #   - Unlike `core` and `alloc`, `std` depends on more than a dozen crates,
211 #     including third-party crates that need to be downloaded, plus custom
212 #     `build.rs` steps. Thus hardcoding things here is not maintainable.
213 #   - `cargo` knows how to build the standard library, but it is an unstable
214 #     feature so far (`-Zbuild-std`).
215 #   - `cargo` only considers the use case of building the standard library
216 #     to use it in a given package. Thus we need to create a dummy package
217 #     and pick the generated libraries from there.
218 #   - Since we only keep a subset of upstream `alloc` in-tree, we need
219 #     to recreate it on the fly by putting our sources on top.
220 #   - The usual ways of modifying the dependency graph in `cargo` do not seem
221 #     to apply for the `-Zbuild-std` steps, thus we have to mislead it
222 #     by modifying the sources in the sysroot.
223 #   - To avoid messing with the user's Rust installation, we create a clone
224 #     of the sysroot. However, `cargo` ignores `RUSTFLAGS` in the `-Zbuild-std`
225 #     steps, thus we use a wrapper binary passed via `RUSTC` to pass the flag.
226 #
227 # In the future, we hope to avoid the whole ordeal by either:
228 #   - Making the `test` crate not depend on `std` (either improving upstream
229 #     or having our own custom crate).
230 #   - Making the tests run in kernel space (requires the previous point).
231 #   - Making `std` and friends be more like a "normal" crate, so that
232 #     `-Zbuild-std` and related hacks are not needed.
233 quiet_cmd_rustsysroot = RUSTSYSROOT
234       cmd_rustsysroot = \
235 	rm -rf $(objtree)/$(obj)/test; \
236 	mkdir -p $(objtree)/$(obj)/test; \
237 	cp -a $(rustc_sysroot) $(objtree)/$(obj)/test/sysroot; \
238 	cp -r $(srctree)/$(src)/alloc/* \
239 		$(objtree)/$(obj)/test/sysroot/lib/rustlib/src/rust/library/alloc/src; \
240 	echo '\#!/bin/sh' > $(objtree)/$(obj)/test/rustc_sysroot; \
241 	echo "$(RUSTC) --sysroot=$(abspath $(objtree)/$(obj)/test/sysroot) \"\$$@\"" \
242 		>> $(objtree)/$(obj)/test/rustc_sysroot; \
243 	chmod u+x $(objtree)/$(obj)/test/rustc_sysroot; \
244 	$(CARGO) -q new $(objtree)/$(obj)/test/dummy; \
245 	RUSTC=$(objtree)/$(obj)/test/rustc_sysroot $(CARGO) $(cargo_quiet) \
246 		test -Zbuild-std --target $(rustc_host_target) \
247 		--manifest-path $(objtree)/$(obj)/test/dummy/Cargo.toml; \
248 	rm $(objtree)/$(obj)/test/sysroot/lib/rustlib/$(rustc_host_target)/lib/*; \
249 	cp $(objtree)/$(obj)/test/dummy/target/$(rustc_host_target)/debug/deps/* \
250 		$(objtree)/$(obj)/test/sysroot/lib/rustlib/$(rustc_host_target)/lib
251 
252 rusttest-prepare: FORCE
253 	$(call if_changed,rustsysroot)
254 
255 rusttest-macros: private rustc_target_flags = --extern proc_macro
256 rusttest-macros: private rustdoc_test_target_flags = --crate-type proc-macro
257 rusttest-macros: $(src)/macros/lib.rs rusttest-prepare FORCE
258 	$(call if_changed,rustc_test)
259 	$(call if_changed,rustdoc_test)
260 
261 rusttest-kernel: private rustc_target_flags = --extern alloc \
262     --extern build_error --extern macros --extern bindings --extern uapi
263 rusttest-kernel: $(src)/kernel/lib.rs rusttest-prepare \
264     rusttestlib-build_error rusttestlib-macros rusttestlib-bindings \
265     rusttestlib-uapi FORCE
266 	$(call if_changed,rustc_test)
267 	$(call if_changed,rustc_test_library)
268 
269 ifdef CONFIG_CC_IS_CLANG
270 bindgen_c_flags = $(c_flags)
271 else
272 # bindgen relies on libclang to parse C. Ideally, bindgen would support a GCC
273 # plugin backend and/or the Clang driver would be perfectly compatible with GCC.
274 #
275 # For the moment, here we are tweaking the flags on the fly. This is a hack,
276 # and some kernel configurations may not work (e.g. `GCC_PLUGIN_RANDSTRUCT`
277 # if we end up using one of those structs).
278 bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \
279 	-mskip-rax-setup -mgeneral-regs-only -msign-return-address=% \
280 	-mindirect-branch=thunk-extern -mindirect-branch-register \
281 	-mfunction-return=thunk-extern -mrecord-mcount -mabi=lp64 \
282 	-mindirect-branch-cs-prefix -mstack-protector-guard% -mtraceback=no \
283 	-mno-pointers-to-nested-functions -mno-string \
284 	-mno-strict-align -mstrict-align \
285 	-fconserve-stack -falign-jumps=% -falign-loops=% \
286 	-femit-struct-debug-baseonly -fno-ipa-cp-clone -fno-ipa-sra \
287 	-fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \
288 	-fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \
289 	-fzero-call-used-regs=% -fno-stack-clash-protection \
290 	-fno-inline-functions-called-once -fsanitize=bounds-strict \
291 	-fstrict-flex-arrays=% \
292 	--param=% --param asan-%
293 
294 # Derived from `scripts/Makefile.clang`.
295 BINDGEN_TARGET_x86	:= x86_64-linux-gnu
296 BINDGEN_TARGET		:= $(BINDGEN_TARGET_$(SRCARCH))
297 
298 # All warnings are inhibited since GCC builds are very experimental,
299 # many GCC warnings are not supported by Clang, they may only appear in
300 # some configurations, with new GCC versions, etc.
301 bindgen_extra_c_flags = -w --target=$(BINDGEN_TARGET)
302 
303 # Auto variable zero-initialization requires an additional special option with
304 # clang that is going to be removed sometime in the future (likely in
305 # clang-18), so make sure to pass this option only if clang supports it
306 # (libclang major version < 16).
307 #
308 # https://github.com/llvm/llvm-project/issues/44842
309 # https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags
310 ifdef CONFIG_INIT_STACK_ALL_ZERO
311 libclang_maj_ver=$(shell $(BINDGEN) $(srctree)/scripts/rust_is_available_bindgen_libclang.h 2>&1 | sed -ne 's/.*clang version \([0-9]*\).*/\1/p')
312 ifeq ($(shell expr $(libclang_maj_ver) \< 16), 1)
313 bindgen_extra_c_flags += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
314 endif
315 endif
316 
317 bindgen_c_flags = $(filter-out $(bindgen_skip_c_flags), $(c_flags)) \
318 	$(bindgen_extra_c_flags)
319 endif
320 
321 ifdef CONFIG_LTO
322 bindgen_c_flags_lto = $(filter-out $(CC_FLAGS_LTO), $(bindgen_c_flags))
323 else
324 bindgen_c_flags_lto = $(bindgen_c_flags)
325 endif
326 
327 bindgen_c_flags_final = $(bindgen_c_flags_lto) -D__BINDGEN__
328 
329 quiet_cmd_bindgen = BINDGEN $@
330       cmd_bindgen = \
331 	$(BINDGEN) $< $(bindgen_target_flags) \
332 		--use-core --with-derive-default --ctypes-prefix core::ffi --no-layout-tests \
333 		--no-debug '.*' \
334 		-o $@ -- $(bindgen_c_flags_final) -DMODULE \
335 		$(bindgen_target_cflags) $(bindgen_target_extra)
336 
337 $(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \
338     $(shell grep -v '^#\|^$$' $(srctree)/$(src)/bindgen_parameters)
339 $(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \
340     $(src)/bindgen_parameters FORCE
341 	$(call if_changed_dep,bindgen)
342 
343 $(obj)/uapi/uapi_generated.rs: private bindgen_target_flags = \
344     $(shell grep -v '^#\|^$$' $(srctree)/$(src)/bindgen_parameters)
345 $(obj)/uapi/uapi_generated.rs: $(src)/uapi/uapi_helper.h \
346     $(src)/bindgen_parameters FORCE
347 	$(call if_changed_dep,bindgen)
348 
349 # See `CFLAGS_REMOVE_helpers.o` above. In addition, Clang on C does not warn
350 # with `-Wmissing-declarations` (unlike GCC), so it is not strictly needed here
351 # given it is `libclang`; but for consistency, future Clang changes and/or
352 # a potential future GCC backend for `bindgen`, we disable it too.
353 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_flags = \
354     --blocklist-type '.*' --allowlist-var '' \
355     --allowlist-function 'rust_helper_.*'
356 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_cflags = \
357     -I$(objtree)/$(obj) -Wno-missing-prototypes -Wno-missing-declarations
358 $(obj)/bindings/bindings_helpers_generated.rs: private bindgen_target_extra = ; \
359     sed -Ei 's/pub fn rust_helper_([a-zA-Z0-9_]*)/#[link_name="rust_helper_\1"]\n    pub fn \1/g' $@
360 $(obj)/bindings/bindings_helpers_generated.rs: $(src)/helpers.c FORCE
361 	$(call if_changed_dep,bindgen)
362 
363 quiet_cmd_exports = EXPORTS $@
364       cmd_exports = \
365 	$(NM) -p --defined-only $< \
366 		| awk '/ (T|R|D|B) / {printf "EXPORT_SYMBOL_RUST_GPL(%s);\n",$$3}' > $@
367 
368 $(obj)/exports_core_generated.h: $(obj)/core.o FORCE
369 	$(call if_changed,exports)
370 
371 $(obj)/exports_alloc_generated.h: $(obj)/alloc.o FORCE
372 	$(call if_changed,exports)
373 
374 $(obj)/exports_bindings_generated.h: $(obj)/bindings.o FORCE
375 	$(call if_changed,exports)
376 
377 $(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE
378 	$(call if_changed,exports)
379 
380 quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
381       cmd_rustc_procmacro = \
382 	$(RUSTC_OR_CLIPPY) $(rust_common_flags) \
383 		--emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
384 		--crate-type proc-macro \
385 		--crate-name $(patsubst lib%.so,%,$(notdir $@)) $<
386 
387 # Procedural macros can only be used with the `rustc` that compiled it.
388 # Therefore, to get `libmacros.so` automatically recompiled when the compiler
389 # version changes, we add `core.o` as a dependency (even if it is not needed).
390 $(obj)/libmacros.so: $(src)/macros/lib.rs $(obj)/core.o FORCE
391 	$(call if_changed_dep,rustc_procmacro)
392 
393 quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L $@
394       cmd_rustc_library = \
395 	OBJTREE=$(abspath $(objtree)) \
396 	$(if $(skip_clippy),$(RUSTC),$(RUSTC_OR_CLIPPY)) \
397 		$(filter-out $(skip_flags),$(rust_flags) $(rustc_target_flags)) \
398 		--emit=dep-info=$(depfile) --emit=obj=$@ \
399 		--emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \
400 		--crate-type rlib -L$(objtree)/$(obj) \
401 		--crate-name $(patsubst %.o,%,$(notdir $@)) $< \
402 	$(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@)
403 
404 rust-analyzer:
405 	$(Q)$(srctree)/scripts/generate_rust_analyzer.py \
406 		--cfgs='core=$(core-cfgs)' --cfgs='alloc=$(alloc-cfgs)' \
407 		$(abs_srctree) $(abs_objtree) \
408 		$(RUST_LIB_SRC) $(KBUILD_EXTMOD) > \
409 		$(if $(KBUILD_EXTMOD),$(extmod_prefix),$(objtree))/rust-project.json
410 
411 redirect-intrinsics = \
412 	__addsf3 __eqsf2 __gesf2 __lesf2 __ltsf2 __mulsf3 __nesf2 __unordsf2 \
413 	__adddf3 __ledf2 __ltdf2 __muldf3 __unorddf2 \
414 	__muloti4 __multi3 \
415 	__udivmodti4 __udivti3 __umodti3
416 
417 ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),)
418 	# These intrinsics are defined for ARM64 and RISCV64
419 	redirect-intrinsics += \
420 		__ashrti3 \
421 		__ashlti3 __lshrti3
422 endif
423 
424 $(obj)/core.o: private skip_clippy = 1
425 $(obj)/core.o: private skip_flags = -Dunreachable_pub
426 $(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--redefine-sym $(sym)=__rust$(sym))
427 $(obj)/core.o: private rustc_target_flags = $(core-cfgs)
428 $(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs scripts/target.json FORCE
429 	$(call if_changed_dep,rustc_library)
430 
431 $(obj)/compiler_builtins.o: private rustc_objcopy = -w -W '__*'
432 $(obj)/compiler_builtins.o: $(src)/compiler_builtins.rs $(obj)/core.o FORCE
433 	$(call if_changed_dep,rustc_library)
434 
435 $(obj)/alloc.o: private skip_clippy = 1
436 $(obj)/alloc.o: private skip_flags = -Dunreachable_pub
437 $(obj)/alloc.o: private rustc_target_flags = $(alloc-cfgs)
438 $(obj)/alloc.o: $(src)/alloc/lib.rs $(obj)/compiler_builtins.o FORCE
439 	$(call if_changed_dep,rustc_library)
440 
441 $(obj)/build_error.o: $(src)/build_error.rs $(obj)/compiler_builtins.o FORCE
442 	$(call if_changed_dep,rustc_library)
443 
444 $(obj)/bindings.o: $(src)/bindings/lib.rs \
445     $(obj)/compiler_builtins.o \
446     $(obj)/bindings/bindings_generated.rs \
447     $(obj)/bindings/bindings_helpers_generated.rs FORCE
448 	$(call if_changed_dep,rustc_library)
449 
450 $(obj)/uapi.o: $(src)/uapi/lib.rs \
451     $(obj)/compiler_builtins.o \
452     $(obj)/uapi/uapi_generated.rs FORCE
453 	$(call if_changed_dep,rustc_library)
454 
455 $(obj)/kernel.o: private rustc_target_flags = --extern alloc \
456     --extern build_error --extern macros --extern bindings --extern uapi
457 $(obj)/kernel.o: $(src)/kernel/lib.rs $(obj)/alloc.o $(obj)/build_error.o \
458     $(obj)/libmacros.so $(obj)/bindings.o $(obj)/uapi.o FORCE
459 	$(call if_changed_dep,rustc_library)
460 
461 endif # CONFIG_RUST
462