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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | VERSION = 6 | |
3 | PATCHLEVEL = 6 | |
4 | SUBLEVEL = 0 | |
5 | EXTRAVERSION = -rc4 | |
6 | NAME = Hurr durr I'ma ninja sloth | |
7 | ||
8 | # *DOCUMENTATION* | |
9 | # To see a list of typical targets execute "make help" | |
10 | # More info can be located in ./README | |
11 | # Comments in this file are targeted only to the developer, do not | |
12 | # expect to learn how to build the kernel reading this file. | |
13 | ||
14 | ifeq ($(filter undefine,$(.FEATURES)),) | |
15 | $(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION)) | |
16 | endif | |
17 | ||
18 | $(if $(filter __%, $(MAKECMDGOALS)), \ | |
19 | $(error targets prefixed with '__' are only for internal use)) | |
20 | ||
21 | # That's our default target when none is given on the command line | |
22 | PHONY := __all | |
23 | __all: | |
24 | ||
25 | # We are using a recursive build, so we need to do a little thinking | |
26 | # to get the ordering right. | |
27 | # | |
28 | # Most importantly: sub-Makefiles should only ever modify files in | |
29 | # their own directory. If in some directory we have a dependency on | |
30 | # a file in another dir (which doesn't happen often, but it's often | |
31 | # unavoidable when linking the built-in.a targets which finally | |
32 | # turn into vmlinux), we will call a sub make in that other dir, and | |
33 | # after that we are sure that everything which is in that other dir | |
34 | # is now up to date. | |
35 | # | |
36 | # The only cases where we need to modify files which have global | |
37 | # effects are thus separated out and done before the recursive | |
38 | # descending is started. They are now explicitly listed as the | |
39 | # prepare rule. | |
40 | ||
41 | this-makefile := $(lastword $(MAKEFILE_LIST)) | |
42 | export abs_srctree := $(realpath $(dir $(this-makefile))) | |
43 | export abs_objtree := $(CURDIR) | |
44 | ||
45 | ifneq ($(sub_make_done),1) | |
46 | ||
47 | # Do not use make's built-in rules and variables | |
48 | # (this increases performance and avoids hard-to-debug behaviour) | |
49 | MAKEFLAGS += -rR | |
50 | ||
51 | # Avoid funny character set dependencies | |
52 | unexport LC_ALL | |
53 | LC_COLLATE=C | |
54 | LC_NUMERIC=C | |
55 | export LC_COLLATE LC_NUMERIC | |
56 | ||
57 | # Avoid interference with shell env settings | |
58 | unexport GREP_OPTIONS | |
59 | ||
60 | # Beautify output | |
61 | # --------------------------------------------------------------------------- | |
62 | # | |
63 | # Most of build commands in Kbuild start with "cmd_". You can optionally define | |
64 | # "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from | |
65 | # that command is printed by default. | |
66 | # | |
67 | # e.g.) | |
68 | # quiet_cmd_depmod = DEPMOD $(MODLIB) | |
69 | # cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE) | |
70 | # | |
71 | # A simple variant is to prefix commands with $(Q) - that's useful | |
72 | # for commands that shall be hidden in non-verbose mode. | |
73 | # | |
74 | # $(Q)$(MAKE) $(build)=scripts/basic | |
75 | # | |
76 | # If KBUILD_VERBOSE contains 1, the whole command is echoed. | |
77 | # If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. | |
78 | # | |
79 | # To put more focus on warnings, be less verbose as default | |
80 | # Use 'make V=1' to see the full commands | |
81 | ||
82 | ifeq ("$(origin V)", "command line") | |
83 | KBUILD_VERBOSE = $(V) | |
84 | endif | |
85 | ||
86 | quiet = quiet_ | |
87 | Q = @ | |
88 | ||
89 | ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) | |
90 | quiet = | |
91 | Q = | |
92 | endif | |
93 | ||
94 | # If the user is running make -s (silent mode), suppress echoing of | |
95 | # commands | |
96 | # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. | |
97 | ||
98 | ifeq ($(filter 3.%,$(MAKE_VERSION)),) | |
99 | short-opts := $(firstword -$(MAKEFLAGS)) | |
100 | else | |
101 | short-opts := $(filter-out --%,$(MAKEFLAGS)) | |
102 | endif | |
103 | ||
104 | ifneq ($(findstring s,$(short-opts)),) | |
105 | quiet=silent_ | |
106 | override KBUILD_VERBOSE := | |
107 | endif | |
108 | ||
109 | export quiet Q KBUILD_VERBOSE | |
110 | ||
111 | # Call a source code checker (by default, "sparse") as part of the | |
112 | # C compilation. | |
113 | # | |
114 | # Use 'make C=1' to enable checking of only re-compiled files. | |
115 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
116 | # of whether they are re-compiled or not. | |
117 | # | |
118 | # See the file "Documentation/dev-tools/sparse.rst" for more details, | |
119 | # including where to get the "sparse" utility. | |
120 | ||
121 | ifeq ("$(origin C)", "command line") | |
122 | KBUILD_CHECKSRC = $(C) | |
123 | endif | |
124 | ifndef KBUILD_CHECKSRC | |
125 | KBUILD_CHECKSRC = 0 | |
126 | endif | |
127 | ||
128 | export KBUILD_CHECKSRC | |
129 | ||
130 | # Enable "clippy" (a linter) as part of the Rust compilation. | |
131 | # | |
132 | # Use 'make CLIPPY=1' to enable it. | |
133 | ifeq ("$(origin CLIPPY)", "command line") | |
134 | KBUILD_CLIPPY := $(CLIPPY) | |
135 | endif | |
136 | ||
137 | export KBUILD_CLIPPY | |
138 | ||
139 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the | |
140 | # directory of external module to build. Setting M= takes precedence. | |
141 | ifeq ("$(origin M)", "command line") | |
142 | KBUILD_EXTMOD := $(M) | |
143 | endif | |
144 | ||
145 | $(if $(word 2, $(KBUILD_EXTMOD)), \ | |
146 | $(error building multiple external modules is not supported)) | |
147 | ||
148 | $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ | |
149 | $(error module directory path cannot contain '$x'))) | |
150 | ||
151 | # Remove trailing slashes | |
152 | ifneq ($(filter %/, $(KBUILD_EXTMOD)),) | |
153 | KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) | |
154 | endif | |
155 | ||
156 | export KBUILD_EXTMOD | |
157 | ||
158 | # Kbuild will save output files in the current working directory. | |
159 | # This does not need to match to the root of the kernel source tree. | |
160 | # | |
161 | # For example, you can do this: | |
162 | # | |
163 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
164 | # | |
165 | # If you want to save output files in a different location, there are | |
166 | # two syntaxes to specify it. | |
167 | # | |
168 | # 1) O= | |
169 | # Use "make O=dir/to/store/output/files/" | |
170 | # | |
171 | # 2) Set KBUILD_OUTPUT | |
172 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. | |
173 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
174 | # | |
175 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
176 | # variable. | |
177 | ||
178 | # Do we want to change the working directory? | |
179 | ifeq ("$(origin O)", "command line") | |
180 | KBUILD_OUTPUT := $(O) | |
181 | endif | |
182 | ||
183 | ifneq ($(KBUILD_OUTPUT),) | |
184 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
185 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
186 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
187 | $(if $(abs_objtree),, \ | |
188 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
189 | ||
190 | # $(realpath ...) resolves symlinks | |
191 | abs_objtree := $(realpath $(abs_objtree)) | |
192 | endif # ifneq ($(KBUILD_OUTPUT),) | |
193 | ||
194 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) | |
195 | $(error source directory cannot contain spaces or colons) | |
196 | endif | |
197 | ||
198 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) | |
199 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
200 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
201 | need-sub-make := 1 | |
202 | # Cancel implicit rules for this Makefile. | |
203 | $(this-makefile): ; | |
204 | endif | |
205 | ||
206 | export sub_make_done := 1 | |
207 | ||
208 | endif # sub_make_done | |
209 | ||
210 | ifeq ($(abs_objtree),$(CURDIR)) | |
211 | # Suppress "Entering directory ..." if we are at the final work directory. | |
212 | no-print-directory := --no-print-directory | |
213 | else | |
214 | # Recursion to show "Entering directory ..." | |
215 | need-sub-make := 1 | |
216 | endif | |
217 | ||
218 | ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),) | |
219 | # If --no-print-directory is unset, recurse once again to set it. | |
220 | # You may end up recursing into __sub-make twice. This is needed due to the | |
221 | # behavior change in GNU Make 4.4.1. | |
222 | need-sub-make := 1 | |
223 | endif | |
224 | ||
225 | ifeq ($(need-sub-make),1) | |
226 | ||
227 | PHONY += $(MAKECMDGOALS) __sub-make | |
228 | ||
229 | $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make | |
230 | @: | |
231 | ||
232 | # Invoke a second make in the output directory, passing relevant variables | |
233 | __sub-make: | |
234 | $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \ | |
235 | -f $(abs_srctree)/Makefile $(MAKECMDGOALS) | |
236 | ||
237 | else # need-sub-make | |
238 | ||
239 | # We process the rest of the Makefile if this is the final invocation of make | |
240 | ||
241 | ifeq ($(abs_srctree),$(abs_objtree)) | |
242 | # building in the source tree | |
243 | srctree := . | |
244 | building_out_of_srctree := | |
245 | else | |
246 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) | |
247 | # building in a subdirectory of the source tree | |
248 | srctree := .. | |
249 | else | |
250 | srctree := $(abs_srctree) | |
251 | endif | |
252 | building_out_of_srctree := 1 | |
253 | endif | |
254 | ||
255 | ifneq ($(KBUILD_ABS_SRCTREE),) | |
256 | srctree := $(abs_srctree) | |
257 | endif | |
258 | ||
259 | objtree := . | |
260 | VPATH := $(srctree) | |
261 | ||
262 | export building_out_of_srctree srctree objtree VPATH | |
263 | ||
264 | # To make sure we do not include .config for any of the *config targets | |
265 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
266 | # It is allowed to specify more targets when calling make, including | |
267 | # mixing *config targets and build targets. | |
268 | # For example 'make oldconfig all'. | |
269 | # Detect when mixed targets is specified, and make a second invocation | |
270 | # of make so .config is not included in this case either (for *config). | |
271 | ||
272 | version_h := include/generated/uapi/linux/version.h | |
273 | ||
274 | clean-targets := %clean mrproper cleandocs | |
275 | no-dot-config-targets := $(clean-targets) \ | |
276 | cscope gtags TAGS tags help% %docs check% coccicheck \ | |
277 | $(version_h) headers headers_% archheaders archscripts \ | |
278 | %asm-generic kernelversion %src-pkg dt_binding_check \ | |
279 | outputmakefile rustavailable rustfmt rustfmtcheck | |
280 | # Installation targets should not require compiler. Unfortunately, vdso_install | |
281 | # is an exception where build artifacts may be updated. This must be fixed. | |
282 | no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ | |
283 | headers_install modules_install modules_sign kernelrelease image_name | |
284 | no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \ | |
285 | image_name | |
286 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ | |
287 | ||
288 | config-build := | |
289 | mixed-build := | |
290 | need-config := 1 | |
291 | need-compiler := 1 | |
292 | may-sync-config := 1 | |
293 | single-build := | |
294 | ||
295 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
296 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
297 | need-config := | |
298 | endif | |
299 | endif | |
300 | ||
301 | ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) | |
302 | ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) | |
303 | need-compiler := | |
304 | endif | |
305 | endif | |
306 | ||
307 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
308 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
309 | may-sync-config := | |
310 | endif | |
311 | endif | |
312 | ||
313 | ifneq ($(KBUILD_EXTMOD),) | |
314 | may-sync-config := | |
315 | endif | |
316 | ||
317 | ifeq ($(KBUILD_EXTMOD),) | |
318 | ifneq ($(filter %config,$(MAKECMDGOALS)),) | |
319 | config-build := 1 | |
320 | ifneq ($(words $(MAKECMDGOALS)),1) | |
321 | mixed-build := 1 | |
322 | endif | |
323 | endif | |
324 | endif | |
325 | ||
326 | # We cannot build single targets and the others at the same time | |
327 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
328 | single-build := 1 | |
329 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
330 | mixed-build := 1 | |
331 | endif | |
332 | endif | |
333 | ||
334 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
335 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
336 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
337 | mixed-build := 1 | |
338 | endif | |
339 | endif | |
340 | ||
341 | # install and modules_install need also be processed one by one | |
342 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
343 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
344 | mixed-build := 1 | |
345 | endif | |
346 | endif | |
347 | ||
348 | ifdef mixed-build | |
349 | # =========================================================================== | |
350 | # We're called with mixed targets (*config and build targets). | |
351 | # Handle them one by one. | |
352 | ||
353 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
354 | ||
355 | $(MAKECMDGOALS): __build_one_by_one | |
356 | @: | |
357 | ||
358 | __build_one_by_one: | |
359 | $(Q)set -e; \ | |
360 | for i in $(MAKECMDGOALS); do \ | |
361 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
362 | done | |
363 | ||
364 | else # !mixed-build | |
365 | ||
366 | include $(srctree)/scripts/Kbuild.include | |
367 | ||
368 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
369 | KERNELRELEASE = $(call read-file, include/config/kernel.release) | |
370 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
371 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
372 | ||
373 | include $(srctree)/scripts/subarch.include | |
374 | ||
375 | # Cross compiling and selecting different set of gcc/bin-utils | |
376 | # --------------------------------------------------------------------------- | |
377 | # | |
378 | # When performing cross compilation for other architectures ARCH shall be set | |
379 | # to the target architecture. (See arch/* for the possibilities). | |
380 | # ARCH can be set during invocation of make: | |
381 | # make ARCH=ia64 | |
382 | # Another way is to have ARCH set in the environment. | |
383 | # The default ARCH is the host where make is executed. | |
384 | ||
385 | # CROSS_COMPILE specify the prefix used for all executables used | |
386 | # during compilation. Only gcc and related bin-utils executables | |
387 | # are prefixed with $(CROSS_COMPILE). | |
388 | # CROSS_COMPILE can be set on the command line | |
389 | # make CROSS_COMPILE=ia64-linux- | |
390 | # Alternatively CROSS_COMPILE can be set in the environment. | |
391 | # Default value for CROSS_COMPILE is not to prefix executables | |
392 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
393 | ARCH ?= $(SUBARCH) | |
394 | ||
395 | # Architecture as present in compile.h | |
396 | UTS_MACHINE := $(ARCH) | |
397 | SRCARCH := $(ARCH) | |
398 | ||
399 | # Additional ARCH settings for x86 | |
400 | ifeq ($(ARCH),i386) | |
401 | SRCARCH := x86 | |
402 | endif | |
403 | ifeq ($(ARCH),x86_64) | |
404 | SRCARCH := x86 | |
405 | endif | |
406 | ||
407 | # Additional ARCH settings for sparc | |
408 | ifeq ($(ARCH),sparc32) | |
409 | SRCARCH := sparc | |
410 | endif | |
411 | ifeq ($(ARCH),sparc64) | |
412 | SRCARCH := sparc | |
413 | endif | |
414 | ||
415 | # Additional ARCH settings for parisc | |
416 | ifeq ($(ARCH),parisc64) | |
417 | SRCARCH := parisc | |
418 | endif | |
419 | ||
420 | export cross_compiling := | |
421 | ifneq ($(SRCARCH),$(SUBARCH)) | |
422 | cross_compiling := 1 | |
423 | endif | |
424 | ||
425 | KCONFIG_CONFIG ?= .config | |
426 | export KCONFIG_CONFIG | |
427 | ||
428 | # SHELL used by kbuild | |
429 | CONFIG_SHELL := sh | |
430 | ||
431 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) | |
432 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
433 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
434 | ||
435 | ifneq ($(LLVM),) | |
436 | ifneq ($(filter %/,$(LLVM)),) | |
437 | LLVM_PREFIX := $(LLVM) | |
438 | else ifneq ($(filter -%,$(LLVM)),) | |
439 | LLVM_SUFFIX := $(LLVM) | |
440 | endif | |
441 | ||
442 | HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) | |
443 | HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) | |
444 | else | |
445 | HOSTCC = gcc | |
446 | HOSTCXX = g++ | |
447 | endif | |
448 | HOSTRUSTC = rustc | |
449 | HOSTPKG_CONFIG = pkg-config | |
450 | ||
451 | KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ | |
452 | -O2 -fomit-frame-pointer -std=gnu11 | |
453 | KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) | |
454 | KBUILD_USERLDFLAGS := $(USERLDFLAGS) | |
455 | ||
456 | # These flags apply to all Rust code in the tree, including the kernel and | |
457 | # host programs. | |
458 | export rust_common_flags := --edition=2021 \ | |
459 | -Zbinary_dep_depinfo=y \ | |
460 | -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ | |
461 | -Dunreachable_pub -Dnon_ascii_idents \ | |
462 | -Wmissing_docs \ | |
463 | -Drustdoc::missing_crate_level_docs \ | |
464 | -Dclippy::correctness -Dclippy::style \ | |
465 | -Dclippy::suspicious -Dclippy::complexity \ | |
466 | -Dclippy::perf \ | |
467 | -Dclippy::let_unit_value -Dclippy::mut_mut \ | |
468 | -Dclippy::needless_bitwise_bool \ | |
469 | -Dclippy::needless_continue \ | |
470 | -Dclippy::no_mangle_with_rust_abi \ | |
471 | -Wclippy::dbg_macro | |
472 | ||
473 | KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) | |
474 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
475 | KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ | |
476 | -Zallow-features= $(HOSTRUSTFLAGS) | |
477 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
478 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
479 | ||
480 | # Make variables (CC, etc...) | |
481 | CPP = $(CC) -E | |
482 | ifneq ($(LLVM),) | |
483 | CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) | |
484 | LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) | |
485 | AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) | |
486 | NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) | |
487 | OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) | |
488 | OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) | |
489 | READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) | |
490 | STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) | |
491 | else | |
492 | CC = $(CROSS_COMPILE)gcc | |
493 | LD = $(CROSS_COMPILE)ld | |
494 | AR = $(CROSS_COMPILE)ar | |
495 | NM = $(CROSS_COMPILE)nm | |
496 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
497 | OBJDUMP = $(CROSS_COMPILE)objdump | |
498 | READELF = $(CROSS_COMPILE)readelf | |
499 | STRIP = $(CROSS_COMPILE)strip | |
500 | endif | |
501 | RUSTC = rustc | |
502 | RUSTDOC = rustdoc | |
503 | RUSTFMT = rustfmt | |
504 | CLIPPY_DRIVER = clippy-driver | |
505 | BINDGEN = bindgen | |
506 | CARGO = cargo | |
507 | PAHOLE = pahole | |
508 | RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids | |
509 | LEX = flex | |
510 | YACC = bison | |
511 | AWK = awk | |
512 | INSTALLKERNEL := installkernel | |
513 | PERL = perl | |
514 | PYTHON3 = python3 | |
515 | CHECK = sparse | |
516 | BASH = bash | |
517 | KGZIP = gzip | |
518 | KBZIP2 = bzip2 | |
519 | KLZOP = lzop | |
520 | LZMA = lzma | |
521 | LZ4 = lz4c | |
522 | XZ = xz | |
523 | ZSTD = zstd | |
524 | ||
525 | PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) | |
526 | ||
527 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
528 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) | |
529 | NOSTDINC_FLAGS := | |
530 | CFLAGS_MODULE = | |
531 | RUSTFLAGS_MODULE = | |
532 | AFLAGS_MODULE = | |
533 | LDFLAGS_MODULE = | |
534 | CFLAGS_KERNEL = | |
535 | RUSTFLAGS_KERNEL = | |
536 | AFLAGS_KERNEL = | |
537 | LDFLAGS_vmlinux = | |
538 | ||
539 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
540 | USERINCLUDE := \ | |
541 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ | |
542 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
543 | -I$(srctree)/include/uapi \ | |
544 | -I$(objtree)/include/generated/uapi \ | |
545 | -include $(srctree)/include/linux/compiler-version.h \ | |
546 | -include $(srctree)/include/linux/kconfig.h | |
547 | ||
548 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
549 | # Needed to be compatible with the O= option | |
550 | LINUXINCLUDE := \ | |
551 | -I$(srctree)/arch/$(SRCARCH)/include \ | |
552 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
553 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ | |
554 | -I$(objtree)/include \ | |
555 | $(USERINCLUDE) | |
556 | ||
557 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE | |
558 | ||
559 | KBUILD_CFLAGS := | |
560 | KBUILD_CFLAGS += -std=gnu11 | |
561 | KBUILD_CFLAGS += -fshort-wchar | |
562 | KBUILD_CFLAGS += -funsigned-char | |
563 | KBUILD_CFLAGS += -fno-common | |
564 | KBUILD_CFLAGS += -fno-PIE | |
565 | KBUILD_CFLAGS += -fno-strict-aliasing | |
566 | ||
567 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
568 | KBUILD_RUSTFLAGS := $(rust_common_flags) \ | |
569 | --target=$(objtree)/scripts/target.json \ | |
570 | -Cpanic=abort -Cembed-bitcode=n -Clto=n \ | |
571 | -Cforce-unwind-tables=n -Ccodegen-units=1 \ | |
572 | -Csymbol-mangling-version=v0 \ | |
573 | -Crelocation-model=static \ | |
574 | -Zfunction-sections=n \ | |
575 | -Dclippy::float_arithmetic | |
576 | ||
577 | KBUILD_AFLAGS_KERNEL := | |
578 | KBUILD_CFLAGS_KERNEL := | |
579 | KBUILD_RUSTFLAGS_KERNEL := | |
580 | KBUILD_AFLAGS_MODULE := -DMODULE | |
581 | KBUILD_CFLAGS_MODULE := -DMODULE | |
582 | KBUILD_RUSTFLAGS_MODULE := --cfg MODULE | |
583 | KBUILD_LDFLAGS_MODULE := | |
584 | KBUILD_LDFLAGS := | |
585 | CLANG_FLAGS := | |
586 | ||
587 | ifeq ($(KBUILD_CLIPPY),1) | |
588 | RUSTC_OR_CLIPPY_QUIET := CLIPPY | |
589 | RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) | |
590 | else | |
591 | RUSTC_OR_CLIPPY_QUIET := RUSTC | |
592 | RUSTC_OR_CLIPPY = $(RUSTC) | |
593 | endif | |
594 | ||
595 | ifdef RUST_LIB_SRC | |
596 | export RUST_LIB_SRC | |
597 | endif | |
598 | ||
599 | # Allows the usage of unstable features in stable compilers. | |
600 | export RUSTC_BOOTSTRAP := 1 | |
601 | ||
602 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG | |
603 | export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO | |
604 | export HOSTRUSTC KBUILD_HOSTRUSTFLAGS | |
605 | export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL | |
606 | export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX | |
607 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD | |
608 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE | |
609 | export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS | |
610 | ||
611 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS | |
612 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | |
613 | export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE | |
614 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
615 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
616 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL | |
617 | export PAHOLE_FLAGS | |
618 | ||
619 | # Files to ignore in find ... statements | |
620 | ||
621 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ | |
622 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
623 | -prune -o | |
624 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ | |
625 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
626 | ||
627 | # =========================================================================== | |
628 | # Rules shared between *config targets and build targets | |
629 | ||
630 | # Basic helpers built in scripts/basic/ | |
631 | PHONY += scripts_basic | |
632 | scripts_basic: | |
633 | $(Q)$(MAKE) $(build)=scripts/basic | |
634 | ||
635 | PHONY += outputmakefile | |
636 | ifdef building_out_of_srctree | |
637 | # Before starting out-of-tree build, make sure the source tree is clean. | |
638 | # outputmakefile generates a Makefile in the output directory, if using a | |
639 | # separate output directory. This allows convenient use of make in the | |
640 | # output directory. | |
641 | # At the same time when output Makefile generated, generate .gitignore to | |
642 | # ignore whole output directory | |
643 | ||
644 | quiet_cmd_makefile = GEN Makefile | |
645 | cmd_makefile = { \ | |
646 | echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ | |
647 | echo "include $(srctree)/Makefile"; \ | |
648 | } > Makefile | |
649 | ||
650 | outputmakefile: | |
651 | @if [ -f $(srctree)/.config -o \ | |
652 | -d $(srctree)/include/config -o \ | |
653 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
654 | echo >&2 "***"; \ | |
655 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
656 | echo >&2 "*** in $(abs_srctree)";\ | |
657 | echo >&2 "***"; \ | |
658 | false; \ | |
659 | fi | |
660 | $(Q)ln -fsn $(srctree) source | |
661 | $(call cmd,makefile) | |
662 | $(Q)test -e .gitignore || \ | |
663 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
664 | endif | |
665 | ||
666 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. | |
667 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
668 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
669 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
670 | CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) | |
671 | ||
672 | ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) | |
673 | include $(srctree)/scripts/Makefile.clang | |
674 | endif | |
675 | ||
676 | # Include this also for config targets because some architectures need | |
677 | # cc-cross-prefix to determine CROSS_COMPILE. | |
678 | ifdef need-compiler | |
679 | include $(srctree)/scripts/Makefile.compiler | |
680 | endif | |
681 | ||
682 | ifdef config-build | |
683 | # =========================================================================== | |
684 | # *config targets only - make sure prerequisites are updated, and descend | |
685 | # in scripts/kconfig to make the *config target | |
686 | ||
687 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
688 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
689 | # used for 'make defconfig' | |
690 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
691 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT | |
692 | ||
693 | config: outputmakefile scripts_basic FORCE | |
694 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
695 | ||
696 | %config: outputmakefile scripts_basic FORCE | |
697 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
698 | ||
699 | else #!config-build | |
700 | # =========================================================================== | |
701 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
702 | # targets and others. In general all targets except *config targets. | |
703 | ||
704 | # If building an external module we do not care about the all: rule | |
705 | # but instead __all depend on modules | |
706 | PHONY += all | |
707 | ifeq ($(KBUILD_EXTMOD),) | |
708 | __all: all | |
709 | else | |
710 | __all: modules | |
711 | endif | |
712 | ||
713 | targets := | |
714 | ||
715 | # Decide whether to build built-in, modular, or both. | |
716 | # Normally, just do built-in. | |
717 | ||
718 | KBUILD_MODULES := | |
719 | KBUILD_BUILTIN := 1 | |
720 | ||
721 | # If we have only "make modules", don't compile built-in objects. | |
722 | ifeq ($(MAKECMDGOALS),modules) | |
723 | KBUILD_BUILTIN := | |
724 | endif | |
725 | ||
726 | # If we have "make <whatever> modules", compile modules | |
727 | # in addition to whatever we do anyway. | |
728 | # Just "make" or "make all" shall build modules as well | |
729 | ||
730 | ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) | |
731 | KBUILD_MODULES := 1 | |
732 | endif | |
733 | ||
734 | ifeq ($(MAKECMDGOALS),) | |
735 | KBUILD_MODULES := 1 | |
736 | endif | |
737 | ||
738 | export KBUILD_MODULES KBUILD_BUILTIN | |
739 | ||
740 | ifdef need-config | |
741 | include include/config/auto.conf | |
742 | endif | |
743 | ||
744 | ifeq ($(KBUILD_EXTMOD),) | |
745 | # Objects we will link into vmlinux / subdirs we need to visit | |
746 | core-y := | |
747 | drivers-y := | |
748 | libs-y := lib/ | |
749 | endif # KBUILD_EXTMOD | |
750 | ||
751 | # The all: target is the default when no target is given on the | |
752 | # command line. | |
753 | # This allow a user to issue only 'make' to build a kernel including modules | |
754 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
755 | all: vmlinux | |
756 | ||
757 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage | |
758 | ifdef CONFIG_CC_IS_GCC | |
759 | CFLAGS_GCOV += -fno-tree-loop-im | |
760 | endif | |
761 | export CFLAGS_GCOV | |
762 | ||
763 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. | |
764 | ifdef CONFIG_FUNCTION_TRACER | |
765 | CC_FLAGS_FTRACE := -pg | |
766 | endif | |
767 | ||
768 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
769 | ||
770 | ifdef need-config | |
771 | ifdef may-sync-config | |
772 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if | |
773 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
774 | # because some architectures define CROSS_COMPILE there. | |
775 | include include/config/auto.conf.cmd | |
776 | ||
777 | $(KCONFIG_CONFIG): | |
778 | @echo >&2 '***' | |
779 | @echo >&2 '*** Configuration file "$@" not found!' | |
780 | @echo >&2 '***' | |
781 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
782 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
783 | @echo >&2 '***' | |
784 | @/bin/false | |
785 | ||
786 | # The actual configuration files used during the build are stored in | |
787 | # include/generated/ and include/config/. Update them if .config is newer than | |
788 | # include/config/auto.conf (which mirrors .config). | |
789 | # | |
790 | # This exploits the 'multi-target pattern rule' trick. | |
791 | # The syncconfig should be executed only once to make all the targets. | |
792 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) | |
793 | # | |
794 | # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, | |
795 | # so you cannot notice that Kconfig is waiting for the user input. | |
796 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) | |
797 | $(Q)$(kecho) " SYNC $@" | |
798 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
799 | else # !may-sync-config | |
800 | # External modules and some install targets need include/generated/autoconf.h | |
801 | # and include/config/auto.conf but do not care if they are up-to-date. | |
802 | # Use auto.conf to trigger the test | |
803 | PHONY += include/config/auto.conf | |
804 | ||
805 | include/config/auto.conf: | |
806 | @test -e include/generated/autoconf.h -a -e $@ || ( \ | |
807 | echo >&2; \ | |
808 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
809 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
810 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
811 | echo >&2 ; \ | |
812 | /bin/false) | |
813 | ||
814 | endif # may-sync-config | |
815 | endif # need-config | |
816 | ||
817 | KBUILD_CFLAGS += -fno-delete-null-pointer-checks | |
818 | ||
819 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE | |
820 | KBUILD_CFLAGS += -O2 | |
821 | KBUILD_RUSTFLAGS += -Copt-level=2 | |
822 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
823 | KBUILD_CFLAGS += -Os | |
824 | KBUILD_RUSTFLAGS += -Copt-level=s | |
825 | endif | |
826 | ||
827 | # Always set `debug-assertions` and `overflow-checks` because their default | |
828 | # depends on `opt-level` and `debug-assertions`, respectively. | |
829 | KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) | |
830 | KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) | |
831 | ||
832 | # Tell gcc to never replace conditional load with a non-conditional one | |
833 | ifdef CONFIG_CC_IS_GCC | |
834 | # gcc-10 renamed --param=allow-store-data-races=0 to | |
835 | # -fno-allow-store-data-races. | |
836 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
837 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) | |
838 | endif | |
839 | ||
840 | ifdef CONFIG_READABLE_ASM | |
841 | # Disable optimizations that make assembler listings hard to read. | |
842 | # reorder blocks reorders the control in the function | |
843 | # ipa clone creates specialized cloned functions | |
844 | # partial inlining inlines only parts of functions | |
845 | KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining | |
846 | endif | |
847 | ||
848 | stackp-flags-y := -fno-stack-protector | |
849 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector | |
850 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
851 | ||
852 | KBUILD_CFLAGS += $(stackp-flags-y) | |
853 | ||
854 | KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings | |
855 | KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) | |
856 | ||
857 | ifdef CONFIG_FRAME_POINTER | |
858 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
859 | KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y | |
860 | else | |
861 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
862 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
863 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
864 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
865 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
866 | # In the Rust target specification, "frame-pointer" is set explicitly | |
867 | # to "may-omit". | |
868 | ifndef CONFIG_FUNCTION_TRACER | |
869 | KBUILD_CFLAGS += -fomit-frame-pointer | |
870 | endif | |
871 | endif | |
872 | ||
873 | # Initialize all stack variables with a 0xAA pattern. | |
874 | ifdef CONFIG_INIT_STACK_ALL_PATTERN | |
875 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
876 | endif | |
877 | ||
878 | # Initialize all stack variables with a zero value. | |
879 | ifdef CONFIG_INIT_STACK_ALL_ZERO | |
880 | KBUILD_CFLAGS += -ftrivial-auto-var-init=zero | |
881 | ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER | |
882 | # https://github.com/llvm/llvm-project/issues/44842 | |
883 | CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang | |
884 | export CC_AUTO_VAR_INIT_ZERO_ENABLER | |
885 | KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) | |
886 | endif | |
887 | endif | |
888 | ||
889 | # While VLAs have been removed, GCC produces unreachable stack probes | |
890 | # for the randomize_kstack_offset feature. Disable it for all compilers. | |
891 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) | |
892 | ||
893 | # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). | |
894 | ifdef CONFIG_ZERO_CALL_USED_REGS | |
895 | KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr | |
896 | endif | |
897 | ||
898 | ifdef CONFIG_FUNCTION_TRACER | |
899 | ifdef CONFIG_FTRACE_MCOUNT_USE_CC | |
900 | CC_FLAGS_FTRACE += -mrecord-mcount | |
901 | ifdef CONFIG_HAVE_NOP_MCOUNT | |
902 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
903 | CC_FLAGS_FTRACE += -mnop-mcount | |
904 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
905 | endif | |
906 | endif | |
907 | endif | |
908 | ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL | |
909 | ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT | |
910 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
911 | endif | |
912 | endif | |
913 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT | |
914 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
915 | BUILD_C_RECORDMCOUNT := y | |
916 | export BUILD_C_RECORDMCOUNT | |
917 | endif | |
918 | endif | |
919 | ifdef CONFIG_HAVE_FENTRY | |
920 | # s390-linux-gnu-gcc did not support -mfentry until gcc-9. | |
921 | ifeq ($(call cc-option-yn, -mfentry),y) | |
922 | CC_FLAGS_FTRACE += -mfentry | |
923 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
924 | endif | |
925 | endif | |
926 | export CC_FLAGS_FTRACE | |
927 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
928 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
929 | endif | |
930 | ||
931 | # We trigger additional mismatches with less inlining | |
932 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
933 | KBUILD_CFLAGS += -fno-inline-functions-called-once | |
934 | endif | |
935 | ||
936 | # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). | |
937 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
938 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections | |
939 | KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y | |
940 | LDFLAGS_vmlinux += --gc-sections | |
941 | endif | |
942 | ||
943 | ifdef CONFIG_SHADOW_CALL_STACK | |
944 | ifndef CONFIG_DYNAMIC_SCS | |
945 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack | |
946 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) | |
947 | endif | |
948 | export CC_FLAGS_SCS | |
949 | endif | |
950 | ||
951 | ifdef CONFIG_LTO_CLANG | |
952 | ifdef CONFIG_LTO_CLANG_THIN | |
953 | CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit | |
954 | KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache | |
955 | else | |
956 | CC_FLAGS_LTO := -flto | |
957 | endif | |
958 | CC_FLAGS_LTO += -fvisibility=hidden | |
959 | ||
960 | # Limit inlining across translation units to reduce binary size | |
961 | KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 | |
962 | ||
963 | # Check for frame size exceeding threshold during prolog/epilog insertion | |
964 | # when using lld < 13.0.0. | |
965 | ifneq ($(CONFIG_FRAME_WARN),0) | |
966 | ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) | |
967 | KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) | |
968 | endif | |
969 | endif | |
970 | endif | |
971 | ||
972 | ifdef CONFIG_LTO | |
973 | KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) | |
974 | KBUILD_AFLAGS += -fno-lto | |
975 | export CC_FLAGS_LTO | |
976 | endif | |
977 | ||
978 | ifdef CONFIG_CFI_CLANG | |
979 | CC_FLAGS_CFI := -fsanitize=kcfi | |
980 | KBUILD_CFLAGS += $(CC_FLAGS_CFI) | |
981 | export CC_FLAGS_CFI | |
982 | endif | |
983 | ||
984 | ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) | |
985 | KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) | |
986 | endif | |
987 | ||
988 | # arch Makefile may override CC so keep this after arch Makefile is included | |
989 | NOSTDINC_FLAGS += -nostdinc | |
990 | ||
991 | # To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, | |
992 | # the kernel uses only C99 flexible arrays for dynamically sized trailing | |
993 | # arrays. Enforce this for everything that may examine structure sizes and | |
994 | # perform bounds checking. | |
995 | KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) | |
996 | ||
997 | # disable invalid "can't wrap" optimizations for signed / pointers | |
998 | KBUILD_CFLAGS += -fno-strict-overflow | |
999 | ||
1000 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) | |
1001 | KBUILD_CFLAGS += -fno-stack-check | |
1002 | ||
1003 | # conserve stack if available | |
1004 | ifdef CONFIG_CC_IS_GCC | |
1005 | KBUILD_CFLAGS += -fconserve-stack | |
1006 | endif | |
1007 | ||
1008 | # change __FILE__ to the relative path from the srctree | |
1009 | KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
1010 | ||
1011 | # include additional Makefiles when needed | |
1012 | include-y := scripts/Makefile.extrawarn | |
1013 | include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug | |
1014 | include-$(CONFIG_KASAN) += scripts/Makefile.kasan | |
1015 | include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan | |
1016 | include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan | |
1017 | include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan | |
1018 | include-$(CONFIG_KCOV) += scripts/Makefile.kcov | |
1019 | include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct | |
1020 | include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins | |
1021 | ||
1022 | include $(addprefix $(srctree)/, $(include-y)) | |
1023 | ||
1024 | # scripts/Makefile.gcc-plugins is intentionally included last. | |
1025 | # Do not add $(call cc-option,...) below this line. When you build the kernel | |
1026 | # from the clean source tree, the GCC plugins do not exist at this point. | |
1027 | ||
1028 | # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments | |
1029 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
1030 | KBUILD_AFLAGS += $(KAFLAGS) | |
1031 | KBUILD_CFLAGS += $(KCFLAGS) | |
1032 | KBUILD_RUSTFLAGS += $(KRUSTFLAGS) | |
1033 | ||
1034 | KBUILD_LDFLAGS_MODULE += --build-id=sha1 | |
1035 | LDFLAGS_vmlinux += --build-id=sha1 | |
1036 | ||
1037 | KBUILD_LDFLAGS += -z noexecstack | |
1038 | ifeq ($(CONFIG_LD_IS_BFD),y) | |
1039 | KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) | |
1040 | endif | |
1041 | ||
1042 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
1043 | LDFLAGS_vmlinux += -X | |
1044 | endif | |
1045 | ||
1046 | ifeq ($(CONFIG_RELR),y) | |
1047 | # ld.lld before 15 did not support -z pack-relative-relocs. | |
1048 | LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) | |
1049 | endif | |
1050 | ||
1051 | # We never want expected sections to be placed heuristically by the | |
1052 | # linker. All sections should be explicitly named in the linker script. | |
1053 | ifdef CONFIG_LD_ORPHAN_WARN | |
1054 | LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) | |
1055 | endif | |
1056 | ||
1057 | # Align the bit size of userspace programs with the kernel | |
1058 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
1059 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
1060 | ||
1061 | # make the checker run with the right architecture | |
1062 | CHECKFLAGS += --arch=$(ARCH) | |
1063 | ||
1064 | # insure the checker run with the right endianness | |
1065 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
1066 | ||
1067 | # the checker needs the correct machine size | |
1068 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
1069 | ||
1070 | # Default kernel image to build when no specific target is given. | |
1071 | # KBUILD_IMAGE may be overruled on the command line or | |
1072 | # set in the environment | |
1073 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
1074 | # this default value | |
1075 | export KBUILD_IMAGE ?= vmlinux | |
1076 | ||
1077 | # | |
1078 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
1079 | # images. Default is /boot, but you can set it to other values | |
1080 | export INSTALL_PATH ?= /boot | |
1081 | ||
1082 | # | |
1083 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
1084 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
1085 | # an argument if needed. Otherwise it defaults to the kernel install path | |
1086 | # | |
1087 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1088 | ||
1089 | # | |
1090 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1091 | # relocations required by build roots. This is not defined in the | |
1092 | # makefile but the argument can be passed to make if needed. | |
1093 | # | |
1094 | ||
1095 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
1096 | export MODLIB | |
1097 | ||
1098 | PHONY += prepare0 | |
1099 | ||
1100 | export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) | |
1101 | export MODORDER := $(extmod_prefix)modules.order | |
1102 | export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps | |
1103 | ||
1104 | ifeq ($(KBUILD_EXTMOD),) | |
1105 | ||
1106 | build-dir := . | |
1107 | clean-dirs := $(sort . Documentation \ | |
1108 | $(patsubst %/,%,$(filter %/, $(core-) \ | |
1109 | $(drivers-) $(libs-)))) | |
1110 | ||
1111 | export ARCH_CORE := $(core-y) | |
1112 | export ARCH_LIB := $(filter %/, $(libs-y)) | |
1113 | export ARCH_DRIVERS := $(drivers-y) $(drivers-m) | |
1114 | # Externally visible symbols (used by link-vmlinux.sh) | |
1115 | ||
1116 | KBUILD_VMLINUX_OBJS := ./built-in.a | |
1117 | ifdef CONFIG_MODULES | |
1118 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) | |
1119 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) | |
1120 | else | |
1121 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) | |
1122 | endif | |
1123 | ||
1124 | export KBUILD_VMLINUX_LIBS | |
1125 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
1126 | ||
1127 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1128 | # For the kernel to actually contain only the needed exported symbols, | |
1129 | # we have to build modules as well to determine what those symbols are. | |
1130 | KBUILD_MODULES := 1 | |
1131 | endif | |
1132 | ||
1133 | # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 | |
1134 | quiet_cmd_ar_vmlinux.a = AR $@ | |
1135 | cmd_ar_vmlinux.a = \ | |
1136 | rm -f $@; \ | |
1137 | $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ | |
1138 | $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) | |
1139 | ||
1140 | targets += vmlinux.a | |
1141 | vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE | |
1142 | $(call if_changed,ar_vmlinux.a) | |
1143 | ||
1144 | PHONY += vmlinux_o | |
1145 | vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) | |
1146 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o | |
1147 | ||
1148 | vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o | |
1149 | @: | |
1150 | ||
1151 | PHONY += vmlinux | |
1152 | # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, | |
1153 | # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is | |
1154 | # unrelated; the decompressors just happen to have the same base name, | |
1155 | # arch/*/boot/compressed/vmlinux. | |
1156 | # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. | |
1157 | # | |
1158 | # _LDFLAGS_vmlinux is a workaround for the 'private export' bug: | |
1159 | # https://savannah.gnu.org/bugs/?61463 | |
1160 | # For Make > 4.4, the following simple code will work: | |
1161 | # vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1162 | vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1163 | vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) | |
1164 | vmlinux: vmlinux.o $(KBUILD_LDS) modpost | |
1165 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux | |
1166 | ||
1167 | # The actual objects are generated when descending, | |
1168 | # make sure no implicit rule kicks in | |
1169 | $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; | |
1170 | ||
1171 | ifeq ($(origin KERNELRELEASE),file) | |
1172 | filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) | |
1173 | else | |
1174 | filechk_kernel.release = echo $(KERNELRELEASE) | |
1175 | endif | |
1176 | ||
1177 | # Store (new) KERNELRELEASE string in include/config/kernel.release | |
1178 | include/config/kernel.release: FORCE | |
1179 | $(call filechk,kernel.release) | |
1180 | ||
1181 | # Additional helpers built in scripts/ | |
1182 | # Carefully list dependencies so we do not try to build scripts twice | |
1183 | # in parallel | |
1184 | PHONY += scripts | |
1185 | scripts: scripts_basic scripts_dtc | |
1186 | $(Q)$(MAKE) $(build)=$(@) | |
1187 | ||
1188 | # Things we need to do before we recursively start building the kernel | |
1189 | # or the modules are listed in "prepare". | |
1190 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1191 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1192 | # version.h and scripts_basic is processed / created. | |
1193 | ||
1194 | PHONY += prepare archprepare | |
1195 | ||
1196 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ | |
1197 | asm-generic $(version_h) include/generated/utsrelease.h \ | |
1198 | include/generated/compile.h include/generated/autoconf.h remove-stale-files | |
1199 | ||
1200 | prepare0: archprepare | |
1201 | $(Q)$(MAKE) $(build)=scripts/mod | |
1202 | $(Q)$(MAKE) $(build)=. prepare | |
1203 | ||
1204 | # All the preparing.. | |
1205 | prepare: prepare0 | |
1206 | ifdef CONFIG_RUST | |
1207 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh | |
1208 | $(Q)$(MAKE) $(build)=rust | |
1209 | endif | |
1210 | ||
1211 | PHONY += remove-stale-files | |
1212 | remove-stale-files: | |
1213 | $(Q)$(srctree)/scripts/remove-stale-files | |
1214 | ||
1215 | # Support for using generic headers in asm-generic | |
1216 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj | |
1217 | ||
1218 | PHONY += asm-generic uapi-asm-generic | |
1219 | asm-generic: uapi-asm-generic | |
1220 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ | |
1221 | generic=include/asm-generic | |
1222 | uapi-asm-generic: | |
1223 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ | |
1224 | generic=include/uapi/asm-generic | |
1225 | ||
1226 | # Generate some files | |
1227 | # --------------------------------------------------------------------------- | |
1228 | ||
1229 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1230 | # needs to be updated, so this check is forced on all builds | |
1231 | ||
1232 | uts_len := 64 | |
1233 | define filechk_utsrelease.h | |
1234 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1235 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1236 | exit 1; \ | |
1237 | fi; \ | |
1238 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" | |
1239 | endef | |
1240 | ||
1241 | define filechk_version.h | |
1242 | if [ $(SUBLEVEL) -gt 255 ]; then \ | |
1243 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1244 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ | |
1245 | else \ | |
1246 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1247 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ | |
1248 | fi; \ | |
1249 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ | |
1250 | ((c) > 255 ? 255 : (c)))'; \ | |
1251 | echo \#define LINUX_VERSION_MAJOR $(VERSION); \ | |
1252 | echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ | |
1253 | echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) | |
1254 | endef | |
1255 | ||
1256 | $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) | |
1257 | $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) | |
1258 | $(version_h): FORCE | |
1259 | $(call filechk,version.h) | |
1260 | ||
1261 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1262 | $(call filechk,utsrelease.h) | |
1263 | ||
1264 | filechk_compile.h = $(srctree)/scripts/mkcompile_h \ | |
1265 | "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" | |
1266 | ||
1267 | include/generated/compile.h: FORCE | |
1268 | $(call filechk,compile.h) | |
1269 | ||
1270 | PHONY += headerdep | |
1271 | headerdep: | |
1272 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
1273 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
1274 | ||
1275 | # --------------------------------------------------------------------------- | |
1276 | # Kernel headers | |
1277 | ||
1278 | #Default location for installed headers | |
1279 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1280 | ||
1281 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include | |
1282 | cmd_headers_install = \ | |
1283 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1284 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1285 | usr/include $(INSTALL_HDR_PATH) | |
1286 | ||
1287 | PHONY += headers_install | |
1288 | headers_install: headers | |
1289 | $(call cmd,headers_install) | |
1290 | ||
1291 | PHONY += archheaders archscripts | |
1292 | ||
1293 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj | |
1294 | ||
1295 | PHONY += headers | |
1296 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
1297 | $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) | |
1298 | $(Q)$(MAKE) $(hdr-inst)=include/uapi | |
1299 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1300 | ||
1301 | ifdef CONFIG_HEADERS_INSTALL | |
1302 | prepare: headers | |
1303 | endif | |
1304 | ||
1305 | PHONY += scripts_unifdef | |
1306 | scripts_unifdef: scripts_basic | |
1307 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1308 | ||
1309 | # --------------------------------------------------------------------------- | |
1310 | # Install | |
1311 | ||
1312 | # Many distributions have the custom install script, /sbin/installkernel. | |
1313 | # If DKMS is installed, 'make install' will eventually recurse back | |
1314 | # to this Makefile to build and install external modules. | |
1315 | # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. | |
1316 | ||
1317 | quiet_cmd_install = INSTALL $(INSTALL_PATH) | |
1318 | cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh | |
1319 | ||
1320 | # --------------------------------------------------------------------------- | |
1321 | # Tools | |
1322 | ||
1323 | ifdef CONFIG_OBJTOOL | |
1324 | prepare: tools/objtool | |
1325 | endif | |
1326 | ||
1327 | ifdef CONFIG_BPF | |
1328 | ifdef CONFIG_DEBUG_INFO_BTF | |
1329 | prepare: tools/bpf/resolve_btfids | |
1330 | endif | |
1331 | endif | |
1332 | ||
1333 | PHONY += resolve_btfids_clean | |
1334 | ||
1335 | resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids | |
1336 | ||
1337 | # tools/bpf/resolve_btfids directory might not exist | |
1338 | # in output directory, skip its clean in that case | |
1339 | resolve_btfids_clean: | |
1340 | ifneq ($(wildcard $(resolve_btfids_O)),) | |
1341 | $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean | |
1342 | endif | |
1343 | ||
1344 | # Clear a bunch of variables before executing the submake | |
1345 | ifeq ($(quiet),silent_) | |
1346 | tools_silent=s | |
1347 | endif | |
1348 | ||
1349 | tools/: FORCE | |
1350 | $(Q)mkdir -p $(objtree)/tools | |
1351 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ | |
1352 | ||
1353 | tools/%: FORCE | |
1354 | $(Q)mkdir -p $(objtree)/tools | |
1355 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* | |
1356 | ||
1357 | # --------------------------------------------------------------------------- | |
1358 | # Kernel selftest | |
1359 | ||
1360 | PHONY += kselftest | |
1361 | kselftest: headers | |
1362 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests | |
1363 | ||
1364 | kselftest-%: headers FORCE | |
1365 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* | |
1366 | ||
1367 | PHONY += kselftest-merge | |
1368 | kselftest-merge: | |
1369 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1370 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ | |
1371 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
1372 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1373 | ||
1374 | # --------------------------------------------------------------------------- | |
1375 | # Devicetree files | |
1376 | ||
1377 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1378 | dtstree := arch/$(SRCARCH)/boot/dts | |
1379 | endif | |
1380 | ||
1381 | ifneq ($(dtstree),) | |
1382 | ||
1383 | %.dtb: dtbs_prepare | |
1384 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1385 | ||
1386 | %.dtbo: dtbs_prepare | |
1387 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1388 | ||
1389 | PHONY += dtbs dtbs_prepare dtbs_install dtbs_check | |
1390 | dtbs: dtbs_prepare | |
1391 | $(Q)$(MAKE) $(build)=$(dtstree) | |
1392 | ||
1393 | # include/config/kernel.release is actually needed when installing DTBs because | |
1394 | # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make | |
1395 | # dtbs_install depend on it as dtbs_install may run as root. | |
1396 | dtbs_prepare: include/config/kernel.release scripts_dtc | |
1397 | ||
1398 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) | |
1399 | export CHECK_DTBS=y | |
1400 | endif | |
1401 | ||
1402 | ifneq ($(CHECK_DTBS),) | |
1403 | dtbs_prepare: dt_binding_check | |
1404 | endif | |
1405 | ||
1406 | dtbs_check: dtbs | |
1407 | ||
1408 | dtbs_install: | |
1409 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) | |
1410 | ||
1411 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1412 | all: dtbs | |
1413 | endif | |
1414 | ||
1415 | endif | |
1416 | ||
1417 | PHONY += scripts_dtc | |
1418 | scripts_dtc: scripts_basic | |
1419 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1420 | ||
1421 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) | |
1422 | export CHECK_DT_BINDING=y | |
1423 | endif | |
1424 | ||
1425 | PHONY += dt_binding_check | |
1426 | dt_binding_check: scripts_dtc | |
1427 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1428 | ||
1429 | PHONY += dt_compatible_check | |
1430 | dt_compatible_check: dt_binding_check | |
1431 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ | |
1432 | ||
1433 | # --------------------------------------------------------------------------- | |
1434 | # Modules | |
1435 | ||
1436 | ifdef CONFIG_MODULES | |
1437 | ||
1438 | # By default, build modules as well | |
1439 | ||
1440 | all: modules | |
1441 | ||
1442 | # When we're building modules with modversions, we need to consider | |
1443 | # the built-in objects during the descend as well, in order to | |
1444 | # make sure the checksums are up to date before we record them. | |
1445 | ifdef CONFIG_MODVERSIONS | |
1446 | KBUILD_BUILTIN := 1 | |
1447 | endif | |
1448 | ||
1449 | # Build modules | |
1450 | # | |
1451 | ||
1452 | # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES | |
1453 | # is an exception. | |
1454 | ifdef CONFIG_DEBUG_INFO_BTF_MODULES | |
1455 | KBUILD_BUILTIN := 1 | |
1456 | modules: vmlinux | |
1457 | endif | |
1458 | ||
1459 | modules: modules_prepare | |
1460 | ||
1461 | # Target to prepare building external modules | |
1462 | modules_prepare: prepare | |
1463 | $(Q)$(MAKE) $(build)=scripts scripts/module.lds | |
1464 | ||
1465 | endif # CONFIG_MODULES | |
1466 | ||
1467 | ### | |
1468 | # Cleaning is done on three levels. | |
1469 | # make clean Delete most generated files | |
1470 | # Leave enough to build external modules | |
1471 | # make mrproper Delete the current configuration, and all generated files | |
1472 | # make distclean Remove editor backup files, patch leftover files and the like | |
1473 | ||
1474 | # Directories & files removed with 'make clean' | |
1475 | CLEAN_FILES += vmlinux.symvers modules-only.symvers \ | |
1476 | modules.builtin modules.builtin.modinfo modules.nsdeps \ | |
1477 | compile_commands.json .thinlto-cache rust/test rust/doc \ | |
1478 | rust-project.json .vmlinux.objs .vmlinux.export.c | |
1479 | ||
1480 | # Directories & files removed with 'make mrproper' | |
1481 | MRPROPER_FILES += include/config include/generated \ | |
1482 | arch/$(SRCARCH)/include/generated .objdiff \ | |
1483 | debian snap tar-install \ | |
1484 | .config .config.old .version \ | |
1485 | Module.symvers \ | |
1486 | certs/signing_key.pem \ | |
1487 | certs/x509.genkey \ | |
1488 | vmlinux-gdb.py \ | |
1489 | rpmbuild \ | |
1490 | rust/libmacros.so | |
1491 | ||
1492 | # clean - Delete most, but leave enough to build external modules | |
1493 | # | |
1494 | clean: rm-files := $(CLEAN_FILES) | |
1495 | ||
1496 | PHONY += archclean vmlinuxclean | |
1497 | ||
1498 | vmlinuxclean: | |
1499 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1500 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) | |
1501 | ||
1502 | clean: archclean vmlinuxclean resolve_btfids_clean | |
1503 | ||
1504 | # mrproper - Delete all generated files, including .config | |
1505 | # | |
1506 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1507 | mrproper-dirs := $(addprefix _mrproper_,scripts) | |
1508 | ||
1509 | PHONY += $(mrproper-dirs) mrproper | |
1510 | $(mrproper-dirs): | |
1511 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1512 | ||
1513 | mrproper: clean $(mrproper-dirs) | |
1514 | $(call cmd,rmfiles) | |
1515 | @find . $(RCS_FIND_IGNORE) \ | |
1516 | \( -name '*.rmeta' \) \ | |
1517 | -type f -print | xargs rm -f | |
1518 | ||
1519 | # distclean | |
1520 | # | |
1521 | PHONY += distclean | |
1522 | ||
1523 | distclean: mrproper | |
1524 | @find . $(RCS_FIND_IGNORE) \ | |
1525 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1526 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ | |
1527 | -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ | |
1528 | -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ | |
1529 | -type f -print | xargs rm -f | |
1530 | ||
1531 | ||
1532 | # Packaging of the kernel to various formats | |
1533 | # --------------------------------------------------------------------------- | |
1534 | ||
1535 | %src-pkg: FORCE | |
1536 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1537 | %pkg: include/config/kernel.release FORCE | |
1538 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1539 | ||
1540 | # Brief documentation of the typical targets used | |
1541 | # --------------------------------------------------------------------------- | |
1542 | ||
1543 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1544 | boards := $(sort $(notdir $(boards))) | |
1545 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1546 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1547 | ||
1548 | PHONY += help | |
1549 | help: | |
1550 | @echo 'Cleaning targets:' | |
1551 | @echo ' clean - Remove most generated files but keep the config and' | |
1552 | @echo ' enough build support to build external modules' | |
1553 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1554 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1555 | @echo '' | |
1556 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1557 | @echo '' | |
1558 | @echo 'Other generic targets:' | |
1559 | @echo ' all - Build all targets marked with [*]' | |
1560 | @echo '* vmlinux - Build the bare kernel' | |
1561 | @echo '* modules - Build all modules' | |
1562 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1563 | @echo ' dir/ - Build all files in dir and below' | |
1564 | @echo ' dir/file.[ois] - Build specified target only' | |
1565 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1566 | @echo ' (requires compiler support for LLVM assembly generation)' | |
1567 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1568 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1569 | @echo ' dir/file.ko - Build module including final link' | |
1570 | @echo ' modules_prepare - Set up for building external modules' | |
1571 | @echo ' tags/TAGS - Generate tags file for editors' | |
1572 | @echo ' cscope - Generate cscope index' | |
1573 | @echo ' gtags - Generate GNU GLOBAL index' | |
1574 | @echo ' kernelrelease - Output the release version string (use with make -s)' | |
1575 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1576 | @echo ' image_name - Output the image name (use with make -s)' | |
1577 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1578 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1579 | echo '' | |
1580 | @echo 'Static analysers:' | |
1581 | @echo ' checkstack - Generate a list of stack hogs' | |
1582 | @echo ' versioncheck - Sanity check on version.h usage' | |
1583 | @echo ' includecheck - Check for duplicate included header files' | |
1584 | @echo ' export_report - List the usages of all exported symbols' | |
1585 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1586 | @echo ' coccicheck - Check with Coccinelle' | |
1587 | @echo ' clang-analyzer - Check with clang static analyzer' | |
1588 | @echo ' clang-tidy - Check with clang-tidy' | |
1589 | @echo '' | |
1590 | @echo 'Tools:' | |
1591 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1592 | @echo '' | |
1593 | @echo 'Kernel selftest:' | |
1594 | @echo ' kselftest - Build and run kernel selftest' | |
1595 | @echo ' Build, install, and boot kernel before' | |
1596 | @echo ' running kselftest on it' | |
1597 | @echo ' Run as root for full coverage' | |
1598 | @echo ' kselftest-all - Build kernel selftest' | |
1599 | @echo ' kselftest-install - Build and install kernel selftest' | |
1600 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1601 | @echo ' kselftest-merge - Merge all the config dependencies of' | |
1602 | @echo ' kselftest to existing .config.' | |
1603 | @echo '' | |
1604 | @echo 'Rust targets:' | |
1605 | @echo ' rustavailable - Checks whether the Rust toolchain is' | |
1606 | @echo ' available and, if not, explains why.' | |
1607 | @echo ' rustfmt - Reformat all the Rust code in the kernel' | |
1608 | @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' | |
1609 | @echo ' is formatted, printing a diff otherwise.' | |
1610 | @echo ' rustdoc - Generate Rust documentation' | |
1611 | @echo ' (requires kernel .config)' | |
1612 | @echo ' rusttest - Runs the Rust tests' | |
1613 | @echo ' (requires kernel .config; downloads external repos)' | |
1614 | @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' | |
1615 | @echo ' (requires kernel .config)' | |
1616 | @echo ' dir/file.[os] - Build specified target only' | |
1617 | @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' | |
1618 | @echo ' Run with RUSTFMT=n to skip reformatting if needed.' | |
1619 | @echo ' The output is not intended to be compilable.' | |
1620 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1621 | @echo '' | |
1622 | @$(if $(dtstree), \ | |
1623 | echo 'Devicetree:'; \ | |
1624 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1625 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1626 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1627 | echo ' dtbs_check - Validate device tree source files';\ | |
1628 | echo '') | |
1629 | ||
1630 | @echo 'Userspace tools targets:' | |
1631 | @echo ' use "make tools/help"' | |
1632 | @echo ' or "cd tools; make help"' | |
1633 | @echo '' | |
1634 | @echo 'Kernel packaging:' | |
1635 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help | |
1636 | @echo '' | |
1637 | @echo 'Documentation targets:' | |
1638 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp | |
1639 | @echo '' | |
1640 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1641 | @$(or $(archhelp),\ | |
1642 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1643 | @echo '' | |
1644 | @$(if $(boards), \ | |
1645 | $(foreach b, $(boards), \ | |
1646 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1647 | echo '') | |
1648 | @$(if $(board-dirs), \ | |
1649 | $(foreach b, $(board-dirs), \ | |
1650 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1651 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1652 | echo '') | |
1653 | ||
1654 | @echo ' make V=n [targets] 1: verbose build' | |
1655 | @echo ' 2: give reason for rebuild of target' | |
1656 | @echo ' V=1 and V=2 can be combined with V=12' | |
1657 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1658 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' | |
1659 | @echo ' (sparse by default)' | |
1660 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1661 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1662 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' | |
1663 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1664 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1665 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1666 | @echo ' e: warnings are being treated as errors' | |
1667 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1668 | @$(if $(dtstree), \ | |
1669 | echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ | |
1670 | echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ | |
1671 | ) | |
1672 | @echo '' | |
1673 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1674 | @echo 'For further info see the ./README file' | |
1675 | ||
1676 | ||
1677 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1678 | ||
1679 | help-boards: $(help-board-dirs) | |
1680 | ||
1681 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) | |
1682 | ||
1683 | $(help-board-dirs): help-%: | |
1684 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1685 | @$(if $(boards-per-dir), \ | |
1686 | $(foreach b, $(boards-per-dir), \ | |
1687 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1688 | echo '') | |
1689 | ||
1690 | ||
1691 | # Documentation targets | |
1692 | # --------------------------------------------------------------------------- | |
1693 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ | |
1694 | linkcheckdocs dochelp refcheckdocs texinfodocs infodocs | |
1695 | PHONY += $(DOC_TARGETS) | |
1696 | $(DOC_TARGETS): | |
1697 | $(Q)$(MAKE) $(build)=Documentation $@ | |
1698 | ||
1699 | ||
1700 | # Rust targets | |
1701 | # --------------------------------------------------------------------------- | |
1702 | ||
1703 | # "Is Rust available?" target | |
1704 | PHONY += rustavailable | |
1705 | rustavailable: | |
1706 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" | |
1707 | ||
1708 | # Documentation target | |
1709 | # | |
1710 | # Using the singular to avoid running afoul of `no-dot-config-targets`. | |
1711 | PHONY += rustdoc | |
1712 | rustdoc: prepare | |
1713 | $(Q)$(MAKE) $(build)=rust $@ | |
1714 | ||
1715 | # Testing target | |
1716 | PHONY += rusttest | |
1717 | rusttest: prepare | |
1718 | $(Q)$(MAKE) $(build)=rust $@ | |
1719 | ||
1720 | # Formatting targets | |
1721 | PHONY += rustfmt rustfmtcheck | |
1722 | ||
1723 | # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. | |
1724 | # | |
1725 | # We match using absolute paths since `find` does not resolve them | |
1726 | # when matching, which is a problem when e.g. `srctree` is `..`. | |
1727 | # We `grep` afterwards in order to remove the directory entry itself. | |
1728 | rustfmt: | |
1729 | $(Q)find $(abs_srctree) -type f -name '*.rs' \ | |
1730 | -o -path $(abs_srctree)/rust/alloc -prune \ | |
1731 | -o -path $(abs_objtree)/rust/test -prune \ | |
1732 | | grep -Fv $(abs_srctree)/rust/alloc \ | |
1733 | | grep -Fv $(abs_objtree)/rust/test \ | |
1734 | | grep -Fv generated \ | |
1735 | | xargs $(RUSTFMT) $(rustfmt_flags) | |
1736 | ||
1737 | rustfmtcheck: rustfmt_flags = --check | |
1738 | rustfmtcheck: rustfmt | |
1739 | ||
1740 | # Misc | |
1741 | # --------------------------------------------------------------------------- | |
1742 | ||
1743 | PHONY += misc-check | |
1744 | misc-check: | |
1745 | $(Q)$(srctree)/scripts/misc-check | |
1746 | ||
1747 | all: misc-check | |
1748 | ||
1749 | PHONY += scripts_gdb | |
1750 | scripts_gdb: prepare0 | |
1751 | $(Q)$(MAKE) $(build)=scripts/gdb | |
1752 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1753 | ||
1754 | ifdef CONFIG_GDB_SCRIPTS | |
1755 | all: scripts_gdb | |
1756 | endif | |
1757 | ||
1758 | else # KBUILD_EXTMOD | |
1759 | ||
1760 | filechk_kernel.release = echo $(KERNELRELEASE) | |
1761 | ||
1762 | ### | |
1763 | # External module support. | |
1764 | # When building external modules the kernel used as basis is considered | |
1765 | # read-only, and no consistency checks are made and the make | |
1766 | # system is not used on the basis kernel. If updates are required | |
1767 | # in the basis kernel ordinary make commands (without M=...) must be used. | |
1768 | ||
1769 | # We are always building only modules. | |
1770 | KBUILD_BUILTIN := | |
1771 | KBUILD_MODULES := 1 | |
1772 | ||
1773 | build-dir := $(KBUILD_EXTMOD) | |
1774 | ||
1775 | compile_commands.json: $(extmod_prefix)compile_commands.json | |
1776 | PHONY += compile_commands.json | |
1777 | ||
1778 | clean-dirs := $(KBUILD_EXTMOD) | |
1779 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ | |
1780 | $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache | |
1781 | ||
1782 | PHONY += prepare | |
1783 | # now expand this into a simple variable to reduce the cost of shell evaluations | |
1784 | prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) | |
1785 | prepare: | |
1786 | @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ | |
1787 | echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ | |
1788 | echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ | |
1789 | echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ | |
1790 | fi | |
1791 | ||
1792 | PHONY += help | |
1793 | help: | |
1794 | @echo ' Building external modules.' | |
1795 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1796 | @echo '' | |
1797 | @echo ' modules - default target, build the module(s)' | |
1798 | @echo ' modules_install - install the module' | |
1799 | @echo ' clean - remove generated files in module directory only' | |
1800 | @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file' | |
1801 | @echo '' | |
1802 | ||
1803 | ifndef CONFIG_MODULES | |
1804 | modules modules_install: __external_modules_error | |
1805 | __external_modules_error: | |
1806 | @echo >&2 '***' | |
1807 | @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' | |
1808 | @echo >&2 '*** You cannot build or install external modules.' | |
1809 | @echo >&2 '***' | |
1810 | @false | |
1811 | endif | |
1812 | ||
1813 | endif # KBUILD_EXTMOD | |
1814 | ||
1815 | # --------------------------------------------------------------------------- | |
1816 | # Modules | |
1817 | ||
1818 | PHONY += modules modules_install modules_sign modules_prepare | |
1819 | ||
1820 | modules_install: | |
1821 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \ | |
1822 | sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y) | |
1823 | ||
1824 | ifeq ($(CONFIG_MODULE_SIG),y) | |
1825 | # modules_sign is a subset of modules_install. | |
1826 | # 'make modules_install modules_sign' is equivalent to 'make modules_install'. | |
1827 | modules_sign: modules_install | |
1828 | @: | |
1829 | else | |
1830 | modules_sign: | |
1831 | @echo >&2 '***' | |
1832 | @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.' | |
1833 | @echo >&2 '***' | |
1834 | @false | |
1835 | endif | |
1836 | ||
1837 | ifdef CONFIG_MODULES | |
1838 | ||
1839 | $(MODORDER): $(build-dir) | |
1840 | @: | |
1841 | ||
1842 | # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. | |
1843 | # This is solely useful to speed up test compiles. | |
1844 | modules: modpost | |
1845 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) | |
1846 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
1847 | endif | |
1848 | ||
1849 | PHONY += modules_check | |
1850 | modules_check: $(MODORDER) | |
1851 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< | |
1852 | ||
1853 | else # CONFIG_MODULES | |
1854 | ||
1855 | modules: | |
1856 | @: | |
1857 | ||
1858 | KBUILD_MODULES := | |
1859 | ||
1860 | endif # CONFIG_MODULES | |
1861 | ||
1862 | PHONY += modpost | |
1863 | modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ | |
1864 | $(if $(KBUILD_MODULES), modules_check) | |
1865 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1866 | ||
1867 | # Single targets | |
1868 | # --------------------------------------------------------------------------- | |
1869 | # To build individual files in subdirectories, you can do like this: | |
1870 | # | |
1871 | # make foo/bar/baz.s | |
1872 | # | |
1873 | # The supported suffixes for single-target are listed in 'single-targets' | |
1874 | # | |
1875 | # To build only under specific subdirectories, you can do like this: | |
1876 | # | |
1877 | # make foo/bar/baz/ | |
1878 | ||
1879 | ifdef single-build | |
1880 | ||
1881 | # .ko is special because modpost is needed | |
1882 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
1883 | single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ | |
1884 | $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) | |
1885 | ||
1886 | $(single-ko): single_modules | |
1887 | @: | |
1888 | $(single-no-ko): $(build-dir) | |
1889 | @: | |
1890 | ||
1891 | # Remove MODORDER when done because it is not the real one. | |
1892 | PHONY += single_modules | |
1893 | single_modules: $(single-no-ko) modules_prepare | |
1894 | $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) | |
1895 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1896 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) | |
1897 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
1898 | endif | |
1899 | $(Q)rm -f $(MODORDER) | |
1900 | ||
1901 | single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) | |
1902 | ||
1903 | KBUILD_MODULES := 1 | |
1904 | ||
1905 | endif | |
1906 | ||
1907 | # Preset locale variables to speed up the build process. Limit locale | |
1908 | # tweaks to this spot to avoid wrong language settings when running | |
1909 | # make menuconfig etc. | |
1910 | # Error messages still appears in the original language | |
1911 | PHONY += $(build-dir) | |
1912 | $(build-dir): prepare | |
1913 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) | |
1914 | ||
1915 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) | |
1916 | PHONY += $(clean-dirs) clean | |
1917 | $(clean-dirs): | |
1918 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1919 | ||
1920 | clean: $(clean-dirs) | |
1921 | $(call cmd,rmfiles) | |
1922 | @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1923 | \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ | |
1924 | -o -name '*.ko.*' \ | |
1925 | -o -name '*.dtb' -o -name '*.dtbo' \ | |
1926 | -o -name '*.dtb.S' -o -name '*.dtbo.S' \ | |
1927 | -o -name '*.dt.yaml' \ | |
1928 | -o -name '*.dwo' -o -name '*.lst' \ | |
1929 | -o -name '*.su' -o -name '*.mod' \ | |
1930 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1931 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ | |
1932 | -o -name '*.asn1.[ch]' \ | |
1933 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1934 | -o -name '*.c.[012]*.*' \ | |
1935 | -o -name '*.ll' \ | |
1936 | -o -name '*.gcno' \ | |
1937 | -o -name '*.*.symversions' \) -type f -print \ | |
1938 | -o -name '.tmp_*' -print \ | |
1939 | | xargs rm -rf | |
1940 | ||
1941 | # Generate tags for editors | |
1942 | # --------------------------------------------------------------------------- | |
1943 | quiet_cmd_tags = GEN $@ | |
1944 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ | |
1945 | ||
1946 | tags TAGS cscope gtags: FORCE | |
1947 | $(call cmd,tags) | |
1948 | ||
1949 | # IDE support targets | |
1950 | PHONY += rust-analyzer | |
1951 | rust-analyzer: | |
1952 | $(Q)$(MAKE) $(build)=rust $@ | |
1953 | ||
1954 | # Script to generate missing namespace dependencies | |
1955 | # --------------------------------------------------------------------------- | |
1956 | ||
1957 | PHONY += nsdeps | |
1958 | nsdeps: export KBUILD_NSDEPS=1 | |
1959 | nsdeps: modules | |
1960 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps | |
1961 | ||
1962 | # Clang Tooling | |
1963 | # --------------------------------------------------------------------------- | |
1964 | ||
1965 | quiet_cmd_gen_compile_commands = GEN $@ | |
1966 | cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) | |
1967 | ||
1968 | $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ | |
1969 | $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ | |
1970 | $(if $(CONFIG_MODULES), $(MODORDER)) FORCE | |
1971 | $(call if_changed,gen_compile_commands) | |
1972 | ||
1973 | targets += $(extmod_prefix)compile_commands.json | |
1974 | ||
1975 | PHONY += clang-tidy clang-analyzer | |
1976 | ||
1977 | ifdef CONFIG_CC_IS_CLANG | |
1978 | quiet_cmd_clang_tools = CHECK $< | |
1979 | cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< | |
1980 | ||
1981 | clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json | |
1982 | $(call cmd,clang_tools) | |
1983 | else | |
1984 | clang-tidy clang-analyzer: | |
1985 | @echo "$@ requires CC=clang" >&2 | |
1986 | @false | |
1987 | endif | |
1988 | ||
1989 | # Scripts to check various things for consistency | |
1990 | # --------------------------------------------------------------------------- | |
1991 | ||
1992 | PHONY += includecheck versioncheck coccicheck export_report | |
1993 | ||
1994 | includecheck: | |
1995 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1996 | -name '*.[hcS]' -type f -print | sort \ | |
1997 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1998 | ||
1999 | versioncheck: | |
2000 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
2001 | -name '*.[hcS]' -type f -print | sort \ | |
2002 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
2003 | ||
2004 | coccicheck: | |
2005 | $(Q)$(BASH) $(srctree)/scripts/$@ | |
2006 | ||
2007 | export_report: | |
2008 | $(PERL) $(srctree)/scripts/export_report.pl | |
2009 | ||
2010 | PHONY += checkstack kernelrelease kernelversion image_name | |
2011 | ||
2012 | # UML needs a little special treatment here. It wants to use the host | |
2013 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
2014 | # else wants $(ARCH), including people doing cross-builds, which means | |
2015 | # that $(SUBARCH) doesn't work here. | |
2016 | ifeq ($(ARCH), um) | |
2017 | CHECKSTACK_ARCH := $(SUBARCH) | |
2018 | else | |
2019 | CHECKSTACK_ARCH := $(ARCH) | |
2020 | endif | |
2021 | checkstack: | |
2022 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
2023 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
2024 | ||
2025 | kernelrelease: | |
2026 | @$(filechk_kernel.release) | |
2027 | ||
2028 | kernelversion: | |
2029 | @echo $(KERNELVERSION) | |
2030 | ||
2031 | image_name: | |
2032 | @echo $(KBUILD_IMAGE) | |
2033 | ||
2034 | PHONY += run-command | |
2035 | run-command: | |
2036 | $(Q)$(KBUILD_RUN_COMMAND) | |
2037 | ||
2038 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
2039 | cmd_rmfiles = rm -rf $(rm-files) | |
2040 | ||
2041 | # read saved command lines for existing targets | |
2042 | existing-targets := $(wildcard $(sort $(targets))) | |
2043 | ||
2044 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
2045 | ||
2046 | endif # config-build | |
2047 | endif # mixed-build | |
2048 | endif # need-sub-make | |
2049 | ||
2050 | PHONY += FORCE | |
2051 | FORCE: | |
2052 | ||
2053 | # Declare the contents of the PHONY variable as phony. We keep that | |
2054 | # information in a variable so we can use it in if_changed and friends. | |
2055 | .PHONY: $(PHONY) |