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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | VERSION = 6 | |
3 | PATCHLEVEL = 8 | |
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 | # backward compatibility | |
159 | KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS) | |
160 | ||
161 | ifeq ("$(origin W)", "command line") | |
162 | KBUILD_EXTRA_WARN := $(W) | |
163 | endif | |
164 | ||
165 | export KBUILD_EXTRA_WARN | |
166 | ||
167 | # Kbuild will save output files in the current working directory. | |
168 | # This does not need to match to the root of the kernel source tree. | |
169 | # | |
170 | # For example, you can do this: | |
171 | # | |
172 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
173 | # | |
174 | # If you want to save output files in a different location, there are | |
175 | # two syntaxes to specify it. | |
176 | # | |
177 | # 1) O= | |
178 | # Use "make O=dir/to/store/output/files/" | |
179 | # | |
180 | # 2) Set KBUILD_OUTPUT | |
181 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. | |
182 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
183 | # | |
184 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
185 | # variable. | |
186 | ||
187 | # Do we want to change the working directory? | |
188 | ifeq ("$(origin O)", "command line") | |
189 | KBUILD_OUTPUT := $(O) | |
190 | endif | |
191 | ||
192 | ifneq ($(KBUILD_OUTPUT),) | |
193 | # $(realpath ...) gets empty if the path does not exist. Run 'mkdir -p' first. | |
194 | $(shell mkdir -p "$(KBUILD_OUTPUT)") | |
195 | # $(realpath ...) resolves symlinks | |
196 | abs_objtree := $(realpath $(KBUILD_OUTPUT)) | |
197 | $(if $(abs_objtree),,$(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
198 | endif # ifneq ($(KBUILD_OUTPUT),) | |
199 | ||
200 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) | |
201 | $(error source directory cannot contain spaces or colons) | |
202 | endif | |
203 | ||
204 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) | |
205 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
206 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
207 | need-sub-make := 1 | |
208 | # Cancel implicit rules for this Makefile. | |
209 | $(this-makefile): ; | |
210 | endif | |
211 | ||
212 | export sub_make_done := 1 | |
213 | ||
214 | endif # sub_make_done | |
215 | ||
216 | ifeq ($(abs_objtree),$(CURDIR)) | |
217 | # Suppress "Entering directory ..." if we are at the final work directory. | |
218 | no-print-directory := --no-print-directory | |
219 | else | |
220 | # Recursion to show "Entering directory ..." | |
221 | need-sub-make := 1 | |
222 | endif | |
223 | ||
224 | ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),) | |
225 | # If --no-print-directory is unset, recurse once again to set it. | |
226 | # You may end up recursing into __sub-make twice. This is needed due to the | |
227 | # behavior change in GNU Make 4.4.1. | |
228 | need-sub-make := 1 | |
229 | endif | |
230 | ||
231 | ifeq ($(need-sub-make),1) | |
232 | ||
233 | PHONY += $(MAKECMDGOALS) __sub-make | |
234 | ||
235 | $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make | |
236 | @: | |
237 | ||
238 | # Invoke a second make in the output directory, passing relevant variables | |
239 | __sub-make: | |
240 | $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \ | |
241 | -f $(abs_srctree)/Makefile $(MAKECMDGOALS) | |
242 | ||
243 | else # need-sub-make | |
244 | ||
245 | # We process the rest of the Makefile if this is the final invocation of make | |
246 | ||
247 | ifeq ($(abs_srctree),$(abs_objtree)) | |
248 | # building in the source tree | |
249 | srctree := . | |
250 | building_out_of_srctree := | |
251 | else | |
252 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) | |
253 | # building in a subdirectory of the source tree | |
254 | srctree := .. | |
255 | else | |
256 | srctree := $(abs_srctree) | |
257 | endif | |
258 | building_out_of_srctree := 1 | |
259 | endif | |
260 | ||
261 | ifneq ($(KBUILD_ABS_SRCTREE),) | |
262 | srctree := $(abs_srctree) | |
263 | endif | |
264 | ||
265 | objtree := . | |
266 | VPATH := $(srctree) | |
267 | ||
268 | export building_out_of_srctree srctree objtree VPATH | |
269 | ||
270 | # To make sure we do not include .config for any of the *config targets | |
271 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
272 | # It is allowed to specify more targets when calling make, including | |
273 | # mixing *config targets and build targets. | |
274 | # For example 'make oldconfig all'. | |
275 | # Detect when mixed targets is specified, and make a second invocation | |
276 | # of make so .config is not included in this case either (for *config). | |
277 | ||
278 | version_h := include/generated/uapi/linux/version.h | |
279 | ||
280 | clean-targets := %clean mrproper cleandocs | |
281 | no-dot-config-targets := $(clean-targets) \ | |
282 | cscope gtags TAGS tags help% %docs check% coccicheck \ | |
283 | $(version_h) headers headers_% archheaders archscripts \ | |
284 | %asm-generic kernelversion %src-pkg dt_binding_check \ | |
285 | outputmakefile rustavailable rustfmt rustfmtcheck | |
286 | no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \ | |
287 | image_name | |
288 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ | |
289 | ||
290 | config-build := | |
291 | mixed-build := | |
292 | need-config := 1 | |
293 | may-sync-config := 1 | |
294 | single-build := | |
295 | ||
296 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
297 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
298 | need-config := | |
299 | endif | |
300 | endif | |
301 | ||
302 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
303 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
304 | may-sync-config := | |
305 | endif | |
306 | endif | |
307 | ||
308 | need-compiler := $(may-sync-config) | |
309 | ||
310 | ifneq ($(KBUILD_EXTMOD),) | |
311 | may-sync-config := | |
312 | endif | |
313 | ||
314 | ifeq ($(KBUILD_EXTMOD),) | |
315 | ifneq ($(filter %config,$(MAKECMDGOALS)),) | |
316 | config-build := 1 | |
317 | ifneq ($(words $(MAKECMDGOALS)),1) | |
318 | mixed-build := 1 | |
319 | endif | |
320 | endif | |
321 | endif | |
322 | ||
323 | # We cannot build single targets and the others at the same time | |
324 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
325 | single-build := 1 | |
326 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
327 | mixed-build := 1 | |
328 | endif | |
329 | endif | |
330 | ||
331 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
332 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
333 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
334 | mixed-build := 1 | |
335 | endif | |
336 | endif | |
337 | ||
338 | # install and modules_install need also be processed one by one | |
339 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
340 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
341 | mixed-build := 1 | |
342 | endif | |
343 | endif | |
344 | ||
345 | ifdef mixed-build | |
346 | # =========================================================================== | |
347 | # We're called with mixed targets (*config and build targets). | |
348 | # Handle them one by one. | |
349 | ||
350 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
351 | ||
352 | $(MAKECMDGOALS): __build_one_by_one | |
353 | @: | |
354 | ||
355 | __build_one_by_one: | |
356 | $(Q)set -e; \ | |
357 | for i in $(MAKECMDGOALS); do \ | |
358 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
359 | done | |
360 | ||
361 | else # !mixed-build | |
362 | ||
363 | include $(srctree)/scripts/Kbuild.include | |
364 | ||
365 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
366 | KERNELRELEASE = $(call read-file, include/config/kernel.release) | |
367 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
368 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
369 | ||
370 | include $(srctree)/scripts/subarch.include | |
371 | ||
372 | # Cross compiling and selecting different set of gcc/bin-utils | |
373 | # --------------------------------------------------------------------------- | |
374 | # | |
375 | # When performing cross compilation for other architectures ARCH shall be set | |
376 | # to the target architecture. (See arch/* for the possibilities). | |
377 | # ARCH can be set during invocation of make: | |
378 | # make ARCH=arm64 | |
379 | # Another way is to have ARCH set in the environment. | |
380 | # The default ARCH is the host where make is executed. | |
381 | ||
382 | # CROSS_COMPILE specify the prefix used for all executables used | |
383 | # during compilation. Only gcc and related bin-utils executables | |
384 | # are prefixed with $(CROSS_COMPILE). | |
385 | # CROSS_COMPILE can be set on the command line | |
386 | # make CROSS_COMPILE=aarch64-linux-gnu- | |
387 | # Alternatively CROSS_COMPILE can be set in the environment. | |
388 | # Default value for CROSS_COMPILE is not to prefix executables | |
389 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
390 | ARCH ?= $(SUBARCH) | |
391 | ||
392 | # Architecture as present in compile.h | |
393 | UTS_MACHINE := $(ARCH) | |
394 | SRCARCH := $(ARCH) | |
395 | ||
396 | # Additional ARCH settings for x86 | |
397 | ifeq ($(ARCH),i386) | |
398 | SRCARCH := x86 | |
399 | endif | |
400 | ifeq ($(ARCH),x86_64) | |
401 | SRCARCH := x86 | |
402 | endif | |
403 | ||
404 | # Additional ARCH settings for sparc | |
405 | ifeq ($(ARCH),sparc32) | |
406 | SRCARCH := sparc | |
407 | endif | |
408 | ifeq ($(ARCH),sparc64) | |
409 | SRCARCH := sparc | |
410 | endif | |
411 | ||
412 | # Additional ARCH settings for parisc | |
413 | ifeq ($(ARCH),parisc64) | |
414 | SRCARCH := parisc | |
415 | endif | |
416 | ||
417 | export cross_compiling := | |
418 | ifneq ($(SRCARCH),$(SUBARCH)) | |
419 | cross_compiling := 1 | |
420 | endif | |
421 | ||
422 | KCONFIG_CONFIG ?= .config | |
423 | export KCONFIG_CONFIG | |
424 | ||
425 | # SHELL used by kbuild | |
426 | CONFIG_SHELL := sh | |
427 | ||
428 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) | |
429 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
430 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
431 | ||
432 | ifneq ($(LLVM),) | |
433 | ifneq ($(filter %/,$(LLVM)),) | |
434 | LLVM_PREFIX := $(LLVM) | |
435 | else ifneq ($(filter -%,$(LLVM)),) | |
436 | LLVM_SUFFIX := $(LLVM) | |
437 | endif | |
438 | ||
439 | HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) | |
440 | HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) | |
441 | else | |
442 | HOSTCC = gcc | |
443 | HOSTCXX = g++ | |
444 | endif | |
445 | HOSTRUSTC = rustc | |
446 | HOSTPKG_CONFIG = pkg-config | |
447 | ||
448 | KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ | |
449 | -O2 -fomit-frame-pointer -std=gnu11 | |
450 | KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) | |
451 | KBUILD_USERLDFLAGS := $(USERLDFLAGS) | |
452 | ||
453 | # These flags apply to all Rust code in the tree, including the kernel and | |
454 | # host programs. | |
455 | export rust_common_flags := --edition=2021 \ | |
456 | -Zbinary_dep_depinfo=y \ | |
457 | -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ | |
458 | -Dunreachable_pub -Dnon_ascii_idents \ | |
459 | -Wmissing_docs \ | |
460 | -Drustdoc::missing_crate_level_docs \ | |
461 | -Dclippy::correctness -Dclippy::style \ | |
462 | -Dclippy::suspicious -Dclippy::complexity \ | |
463 | -Dclippy::perf \ | |
464 | -Dclippy::let_unit_value -Dclippy::mut_mut \ | |
465 | -Dclippy::needless_bitwise_bool \ | |
466 | -Dclippy::needless_continue \ | |
467 | -Dclippy::no_mangle_with_rust_abi \ | |
468 | -Wclippy::dbg_macro | |
469 | ||
470 | KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) | |
471 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
472 | KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ | |
473 | -Zallow-features= $(HOSTRUSTFLAGS) | |
474 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
475 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
476 | ||
477 | # Make variables (CC, etc...) | |
478 | CPP = $(CC) -E | |
479 | ifneq ($(LLVM),) | |
480 | CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) | |
481 | LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) | |
482 | AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) | |
483 | NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) | |
484 | OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) | |
485 | OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) | |
486 | READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) | |
487 | STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) | |
488 | else | |
489 | CC = $(CROSS_COMPILE)gcc | |
490 | LD = $(CROSS_COMPILE)ld | |
491 | AR = $(CROSS_COMPILE)ar | |
492 | NM = $(CROSS_COMPILE)nm | |
493 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
494 | OBJDUMP = $(CROSS_COMPILE)objdump | |
495 | READELF = $(CROSS_COMPILE)readelf | |
496 | STRIP = $(CROSS_COMPILE)strip | |
497 | endif | |
498 | RUSTC = rustc | |
499 | RUSTDOC = rustdoc | |
500 | RUSTFMT = rustfmt | |
501 | CLIPPY_DRIVER = clippy-driver | |
502 | BINDGEN = bindgen | |
503 | CARGO = cargo | |
504 | PAHOLE = pahole | |
505 | RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids | |
506 | LEX = flex | |
507 | YACC = bison | |
508 | AWK = awk | |
509 | INSTALLKERNEL := installkernel | |
510 | PERL = perl | |
511 | PYTHON3 = python3 | |
512 | CHECK = sparse | |
513 | BASH = bash | |
514 | KGZIP = gzip | |
515 | KBZIP2 = bzip2 | |
516 | KLZOP = lzop | |
517 | LZMA = lzma | |
518 | LZ4 = lz4c | |
519 | XZ = xz | |
520 | ZSTD = zstd | |
521 | ||
522 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
523 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) | |
524 | NOSTDINC_FLAGS := | |
525 | CFLAGS_MODULE = | |
526 | RUSTFLAGS_MODULE = | |
527 | AFLAGS_MODULE = | |
528 | LDFLAGS_MODULE = | |
529 | CFLAGS_KERNEL = | |
530 | RUSTFLAGS_KERNEL = | |
531 | AFLAGS_KERNEL = | |
532 | LDFLAGS_vmlinux = | |
533 | ||
534 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
535 | USERINCLUDE := \ | |
536 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ | |
537 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
538 | -I$(srctree)/include/uapi \ | |
539 | -I$(objtree)/include/generated/uapi \ | |
540 | -include $(srctree)/include/linux/compiler-version.h \ | |
541 | -include $(srctree)/include/linux/kconfig.h | |
542 | ||
543 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
544 | # Needed to be compatible with the O= option | |
545 | LINUXINCLUDE := \ | |
546 | -I$(srctree)/arch/$(SRCARCH)/include \ | |
547 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
548 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ | |
549 | -I$(objtree)/include \ | |
550 | $(USERINCLUDE) | |
551 | ||
552 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE | |
553 | ||
554 | KBUILD_CFLAGS := | |
555 | KBUILD_CFLAGS += -std=gnu11 | |
556 | KBUILD_CFLAGS += -fshort-wchar | |
557 | KBUILD_CFLAGS += -funsigned-char | |
558 | KBUILD_CFLAGS += -fno-common | |
559 | KBUILD_CFLAGS += -fno-PIE | |
560 | KBUILD_CFLAGS += -fno-strict-aliasing | |
561 | ||
562 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
563 | KBUILD_RUSTFLAGS := $(rust_common_flags) \ | |
564 | --target=$(objtree)/scripts/target.json \ | |
565 | -Cpanic=abort -Cembed-bitcode=n -Clto=n \ | |
566 | -Cforce-unwind-tables=n -Ccodegen-units=1 \ | |
567 | -Csymbol-mangling-version=v0 \ | |
568 | -Crelocation-model=static \ | |
569 | -Zfunction-sections=n \ | |
570 | -Dclippy::float_arithmetic | |
571 | ||
572 | KBUILD_AFLAGS_KERNEL := | |
573 | KBUILD_CFLAGS_KERNEL := | |
574 | KBUILD_RUSTFLAGS_KERNEL := | |
575 | KBUILD_AFLAGS_MODULE := -DMODULE | |
576 | KBUILD_CFLAGS_MODULE := -DMODULE | |
577 | KBUILD_RUSTFLAGS_MODULE := --cfg MODULE | |
578 | KBUILD_LDFLAGS_MODULE := | |
579 | KBUILD_LDFLAGS := | |
580 | CLANG_FLAGS := | |
581 | ||
582 | ifeq ($(KBUILD_CLIPPY),1) | |
583 | RUSTC_OR_CLIPPY_QUIET := CLIPPY | |
584 | RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) | |
585 | else | |
586 | RUSTC_OR_CLIPPY_QUIET := RUSTC | |
587 | RUSTC_OR_CLIPPY = $(RUSTC) | |
588 | endif | |
589 | ||
590 | ifdef RUST_LIB_SRC | |
591 | export RUST_LIB_SRC | |
592 | endif | |
593 | ||
594 | # Allows the usage of unstable features in stable compilers. | |
595 | export RUSTC_BOOTSTRAP := 1 | |
596 | ||
597 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG | |
598 | export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO | |
599 | export HOSTRUSTC KBUILD_HOSTRUSTFLAGS | |
600 | export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL | |
601 | export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX | |
602 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD | |
603 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE | |
604 | export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS | |
605 | ||
606 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS | |
607 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | |
608 | export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE | |
609 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
610 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
611 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL | |
612 | ||
613 | # Files to ignore in find ... statements | |
614 | ||
615 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ | |
616 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
617 | -prune -o | |
618 | ||
619 | # =========================================================================== | |
620 | # Rules shared between *config targets and build targets | |
621 | ||
622 | # Basic helpers built in scripts/basic/ | |
623 | PHONY += scripts_basic | |
624 | scripts_basic: | |
625 | $(Q)$(MAKE) $(build)=scripts/basic | |
626 | ||
627 | PHONY += outputmakefile | |
628 | ifdef building_out_of_srctree | |
629 | # Before starting out-of-tree build, make sure the source tree is clean. | |
630 | # outputmakefile generates a Makefile in the output directory, if using a | |
631 | # separate output directory. This allows convenient use of make in the | |
632 | # output directory. | |
633 | # At the same time when output Makefile generated, generate .gitignore to | |
634 | # ignore whole output directory | |
635 | ||
636 | quiet_cmd_makefile = GEN Makefile | |
637 | cmd_makefile = { \ | |
638 | echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ | |
639 | echo "include $(srctree)/Makefile"; \ | |
640 | } > Makefile | |
641 | ||
642 | outputmakefile: | |
643 | @if [ -f $(srctree)/.config -o \ | |
644 | -d $(srctree)/include/config -o \ | |
645 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
646 | echo >&2 "***"; \ | |
647 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
648 | echo >&2 "*** in $(abs_srctree)";\ | |
649 | echo >&2 "***"; \ | |
650 | false; \ | |
651 | fi | |
652 | $(Q)ln -fsn $(srctree) source | |
653 | $(call cmd,makefile) | |
654 | $(Q)test -e .gitignore || \ | |
655 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
656 | endif | |
657 | ||
658 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. | |
659 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
660 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
661 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
662 | CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) | |
663 | ||
664 | ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) | |
665 | include $(srctree)/scripts/Makefile.clang | |
666 | endif | |
667 | ||
668 | # Include this also for config targets because some architectures need | |
669 | # cc-cross-prefix to determine CROSS_COMPILE. | |
670 | ifdef need-compiler | |
671 | include $(srctree)/scripts/Makefile.compiler | |
672 | endif | |
673 | ||
674 | ifdef config-build | |
675 | # =========================================================================== | |
676 | # *config targets only - make sure prerequisites are updated, and descend | |
677 | # in scripts/kconfig to make the *config target | |
678 | ||
679 | # Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed. | |
680 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
681 | # used for 'make defconfig' | |
682 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
683 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT | |
684 | ||
685 | config: outputmakefile scripts_basic FORCE | |
686 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
687 | ||
688 | %config: outputmakefile scripts_basic FORCE | |
689 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
690 | ||
691 | else #!config-build | |
692 | # =========================================================================== | |
693 | # Build targets only - this includes vmlinux, arch-specific targets, clean | |
694 | # targets and others. In general all targets except *config targets. | |
695 | ||
696 | # If building an external module we do not care about the all: rule | |
697 | # but instead __all depend on modules | |
698 | PHONY += all | |
699 | ifeq ($(KBUILD_EXTMOD),) | |
700 | __all: all | |
701 | else | |
702 | __all: modules | |
703 | endif | |
704 | ||
705 | targets := | |
706 | ||
707 | # Decide whether to build built-in, modular, or both. | |
708 | # Normally, just do built-in. | |
709 | ||
710 | KBUILD_MODULES := | |
711 | KBUILD_BUILTIN := 1 | |
712 | ||
713 | # If we have only "make modules", don't compile built-in objects. | |
714 | ifeq ($(MAKECMDGOALS),modules) | |
715 | KBUILD_BUILTIN := | |
716 | endif | |
717 | ||
718 | # If we have "make <whatever> modules", compile modules | |
719 | # in addition to whatever we do anyway. | |
720 | # Just "make" or "make all" shall build modules as well | |
721 | ||
722 | ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) | |
723 | KBUILD_MODULES := 1 | |
724 | endif | |
725 | ||
726 | ifeq ($(MAKECMDGOALS),) | |
727 | KBUILD_MODULES := 1 | |
728 | endif | |
729 | ||
730 | export KBUILD_MODULES KBUILD_BUILTIN | |
731 | ||
732 | ifdef need-config | |
733 | include include/config/auto.conf | |
734 | endif | |
735 | ||
736 | ifeq ($(KBUILD_EXTMOD),) | |
737 | # Objects we will link into vmlinux / subdirs we need to visit | |
738 | core-y := | |
739 | drivers-y := | |
740 | libs-y := lib/ | |
741 | endif # KBUILD_EXTMOD | |
742 | ||
743 | # The all: target is the default when no target is given on the | |
744 | # command line. | |
745 | # This allow a user to issue only 'make' to build a kernel including modules | |
746 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
747 | all: vmlinux | |
748 | ||
749 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage | |
750 | ifdef CONFIG_CC_IS_GCC | |
751 | CFLAGS_GCOV += -fno-tree-loop-im | |
752 | endif | |
753 | export CFLAGS_GCOV | |
754 | ||
755 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. | |
756 | ifdef CONFIG_FUNCTION_TRACER | |
757 | CC_FLAGS_FTRACE := -pg | |
758 | endif | |
759 | ||
760 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
761 | ||
762 | ifdef need-config | |
763 | ifdef may-sync-config | |
764 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if | |
765 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
766 | # because some architectures define CROSS_COMPILE there. | |
767 | include include/config/auto.conf.cmd | |
768 | ||
769 | $(KCONFIG_CONFIG): | |
770 | @echo >&2 '***' | |
771 | @echo >&2 '*** Configuration file "$@" not found!' | |
772 | @echo >&2 '***' | |
773 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
774 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
775 | @echo >&2 '***' | |
776 | @/bin/false | |
777 | ||
778 | # The actual configuration files used during the build are stored in | |
779 | # include/generated/ and include/config/. Update them if .config is newer than | |
780 | # include/config/auto.conf (which mirrors .config). | |
781 | # | |
782 | # This exploits the 'multi-target pattern rule' trick. | |
783 | # The syncconfig should be executed only once to make all the targets. | |
784 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) | |
785 | # | |
786 | # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, | |
787 | # so you cannot notice that Kconfig is waiting for the user input. | |
788 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) | |
789 | $(Q)$(kecho) " SYNC $@" | |
790 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
791 | else # !may-sync-config | |
792 | # External modules and some install targets need include/generated/autoconf.h | |
793 | # and include/config/auto.conf but do not care if they are up-to-date. | |
794 | # Use auto.conf to trigger the test | |
795 | PHONY += include/config/auto.conf | |
796 | ||
797 | include/config/auto.conf: | |
798 | @test -e include/generated/autoconf.h -a -e $@ || ( \ | |
799 | echo >&2; \ | |
800 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
801 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
802 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
803 | echo >&2 ; \ | |
804 | /bin/false) | |
805 | ||
806 | endif # may-sync-config | |
807 | endif # need-config | |
808 | ||
809 | KBUILD_CFLAGS += -fno-delete-null-pointer-checks | |
810 | ||
811 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE | |
812 | KBUILD_CFLAGS += -O2 | |
813 | KBUILD_RUSTFLAGS += -Copt-level=2 | |
814 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
815 | KBUILD_CFLAGS += -Os | |
816 | KBUILD_RUSTFLAGS += -Copt-level=s | |
817 | endif | |
818 | ||
819 | # Always set `debug-assertions` and `overflow-checks` because their default | |
820 | # depends on `opt-level` and `debug-assertions`, respectively. | |
821 | KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) | |
822 | KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) | |
823 | ||
824 | # Tell gcc to never replace conditional load with a non-conditional one | |
825 | ifdef CONFIG_CC_IS_GCC | |
826 | # gcc-10 renamed --param=allow-store-data-races=0 to | |
827 | # -fno-allow-store-data-races. | |
828 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
829 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) | |
830 | endif | |
831 | ||
832 | ifdef CONFIG_READABLE_ASM | |
833 | # Disable optimizations that make assembler listings hard to read. | |
834 | # reorder blocks reorders the control in the function | |
835 | # ipa clone creates specialized cloned functions | |
836 | # partial inlining inlines only parts of functions | |
837 | KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining | |
838 | endif | |
839 | ||
840 | stackp-flags-y := -fno-stack-protector | |
841 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector | |
842 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
843 | ||
844 | KBUILD_CFLAGS += $(stackp-flags-y) | |
845 | ||
846 | KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings | |
847 | KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) | |
848 | ||
849 | ifdef CONFIG_FRAME_POINTER | |
850 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
851 | KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y | |
852 | else | |
853 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
854 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
855 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
856 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
857 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
858 | # In the Rust target specification, "frame-pointer" is set explicitly | |
859 | # to "may-omit". | |
860 | ifndef CONFIG_FUNCTION_TRACER | |
861 | KBUILD_CFLAGS += -fomit-frame-pointer | |
862 | endif | |
863 | endif | |
864 | ||
865 | # Initialize all stack variables with a 0xAA pattern. | |
866 | ifdef CONFIG_INIT_STACK_ALL_PATTERN | |
867 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
868 | endif | |
869 | ||
870 | # Initialize all stack variables with a zero value. | |
871 | ifdef CONFIG_INIT_STACK_ALL_ZERO | |
872 | KBUILD_CFLAGS += -ftrivial-auto-var-init=zero | |
873 | ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER | |
874 | # https://github.com/llvm/llvm-project/issues/44842 | |
875 | CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang | |
876 | export CC_AUTO_VAR_INIT_ZERO_ENABLER | |
877 | KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) | |
878 | endif | |
879 | endif | |
880 | ||
881 | # While VLAs have been removed, GCC produces unreachable stack probes | |
882 | # for the randomize_kstack_offset feature. Disable it for all compilers. | |
883 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) | |
884 | ||
885 | # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). | |
886 | ifdef CONFIG_ZERO_CALL_USED_REGS | |
887 | KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr | |
888 | endif | |
889 | ||
890 | ifdef CONFIG_FUNCTION_TRACER | |
891 | ifdef CONFIG_FTRACE_MCOUNT_USE_CC | |
892 | CC_FLAGS_FTRACE += -mrecord-mcount | |
893 | ifdef CONFIG_HAVE_NOP_MCOUNT | |
894 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
895 | CC_FLAGS_FTRACE += -mnop-mcount | |
896 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
897 | endif | |
898 | endif | |
899 | endif | |
900 | ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL | |
901 | ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT | |
902 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
903 | endif | |
904 | endif | |
905 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT | |
906 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
907 | BUILD_C_RECORDMCOUNT := y | |
908 | export BUILD_C_RECORDMCOUNT | |
909 | endif | |
910 | endif | |
911 | ifdef CONFIG_HAVE_FENTRY | |
912 | # s390-linux-gnu-gcc did not support -mfentry until gcc-9. | |
913 | ifeq ($(call cc-option-yn, -mfentry),y) | |
914 | CC_FLAGS_FTRACE += -mfentry | |
915 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
916 | endif | |
917 | endif | |
918 | export CC_FLAGS_FTRACE | |
919 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
920 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
921 | endif | |
922 | ||
923 | # We trigger additional mismatches with less inlining | |
924 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
925 | KBUILD_CFLAGS += -fno-inline-functions-called-once | |
926 | endif | |
927 | ||
928 | # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). | |
929 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
930 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections | |
931 | KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y | |
932 | LDFLAGS_vmlinux += --gc-sections | |
933 | endif | |
934 | ||
935 | ifdef CONFIG_SHADOW_CALL_STACK | |
936 | ifndef CONFIG_DYNAMIC_SCS | |
937 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack | |
938 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) | |
939 | endif | |
940 | export CC_FLAGS_SCS | |
941 | endif | |
942 | ||
943 | ifdef CONFIG_LTO_CLANG | |
944 | ifdef CONFIG_LTO_CLANG_THIN | |
945 | CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit | |
946 | KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache | |
947 | else | |
948 | CC_FLAGS_LTO := -flto | |
949 | endif | |
950 | CC_FLAGS_LTO += -fvisibility=hidden | |
951 | ||
952 | # Limit inlining across translation units to reduce binary size | |
953 | KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 | |
954 | ||
955 | # Check for frame size exceeding threshold during prolog/epilog insertion | |
956 | # when using lld < 13.0.0. | |
957 | ifneq ($(CONFIG_FRAME_WARN),0) | |
958 | ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) | |
959 | KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) | |
960 | endif | |
961 | endif | |
962 | endif | |
963 | ||
964 | ifdef CONFIG_LTO | |
965 | KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) | |
966 | KBUILD_AFLAGS += -fno-lto | |
967 | export CC_FLAGS_LTO | |
968 | endif | |
969 | ||
970 | ifdef CONFIG_CFI_CLANG | |
971 | CC_FLAGS_CFI := -fsanitize=kcfi | |
972 | KBUILD_CFLAGS += $(CC_FLAGS_CFI) | |
973 | export CC_FLAGS_CFI | |
974 | endif | |
975 | ||
976 | ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) | |
977 | KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) | |
978 | endif | |
979 | ||
980 | # arch Makefile may override CC so keep this after arch Makefile is included | |
981 | NOSTDINC_FLAGS += -nostdinc | |
982 | ||
983 | # To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE, | |
984 | # the kernel uses only C99 flexible arrays for dynamically sized trailing | |
985 | # arrays. Enforce this for everything that may examine structure sizes and | |
986 | # perform bounds checking. | |
987 | KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3) | |
988 | ||
989 | #Currently, disable -Wstringop-overflow for GCC 11, globally. | |
990 | KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW) += $(call cc-option, -Wno-stringop-overflow) | |
991 | KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) += $(call cc-option, -Wstringop-overflow) | |
992 | ||
993 | # disable invalid "can't wrap" optimizations for signed / pointers | |
994 | KBUILD_CFLAGS += -fno-strict-overflow | |
995 | ||
996 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) | |
997 | KBUILD_CFLAGS += -fno-stack-check | |
998 | ||
999 | # conserve stack if available | |
1000 | ifdef CONFIG_CC_IS_GCC | |
1001 | KBUILD_CFLAGS += -fconserve-stack | |
1002 | endif | |
1003 | ||
1004 | # change __FILE__ to the relative path from the srctree | |
1005 | KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
1006 | ||
1007 | # include additional Makefiles when needed | |
1008 | include-y := scripts/Makefile.extrawarn | |
1009 | include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug | |
1010 | include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf | |
1011 | include-$(CONFIG_KASAN) += scripts/Makefile.kasan | |
1012 | include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan | |
1013 | include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan | |
1014 | include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan | |
1015 | include-$(CONFIG_KCOV) += scripts/Makefile.kcov | |
1016 | include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct | |
1017 | include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins | |
1018 | ||
1019 | include $(addprefix $(srctree)/, $(include-y)) | |
1020 | ||
1021 | # scripts/Makefile.gcc-plugins is intentionally included last. | |
1022 | # Do not add $(call cc-option,...) below this line. When you build the kernel | |
1023 | # from the clean source tree, the GCC plugins do not exist at this point. | |
1024 | ||
1025 | # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments | |
1026 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
1027 | KBUILD_AFLAGS += $(KAFLAGS) | |
1028 | KBUILD_CFLAGS += $(KCFLAGS) | |
1029 | KBUILD_RUSTFLAGS += $(KRUSTFLAGS) | |
1030 | ||
1031 | KBUILD_LDFLAGS_MODULE += --build-id=sha1 | |
1032 | LDFLAGS_vmlinux += --build-id=sha1 | |
1033 | ||
1034 | KBUILD_LDFLAGS += -z noexecstack | |
1035 | ifeq ($(CONFIG_LD_IS_BFD),y) | |
1036 | KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) | |
1037 | endif | |
1038 | ||
1039 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
1040 | LDFLAGS_vmlinux += -X | |
1041 | endif | |
1042 | ||
1043 | ifeq ($(CONFIG_RELR),y) | |
1044 | # ld.lld before 15 did not support -z pack-relative-relocs. | |
1045 | LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) | |
1046 | endif | |
1047 | ||
1048 | # We never want expected sections to be placed heuristically by the | |
1049 | # linker. All sections should be explicitly named in the linker script. | |
1050 | ifdef CONFIG_LD_ORPHAN_WARN | |
1051 | LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) | |
1052 | endif | |
1053 | ||
1054 | # Align the bit size of userspace programs with the kernel | |
1055 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
1056 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
1057 | ||
1058 | # make the checker run with the right architecture | |
1059 | CHECKFLAGS += --arch=$(ARCH) | |
1060 | ||
1061 | # insure the checker run with the right endianness | |
1062 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
1063 | ||
1064 | # the checker needs the correct machine size | |
1065 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
1066 | ||
1067 | # Default kernel image to build when no specific target is given. | |
1068 | # KBUILD_IMAGE may be overruled on the command line or | |
1069 | # set in the environment | |
1070 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
1071 | # this default value | |
1072 | export KBUILD_IMAGE ?= vmlinux | |
1073 | ||
1074 | # | |
1075 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
1076 | # images. Default is /boot, but you can set it to other values | |
1077 | export INSTALL_PATH ?= /boot | |
1078 | ||
1079 | # | |
1080 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
1081 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
1082 | # an argument if needed. Otherwise it defaults to the kernel install path | |
1083 | # | |
1084 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1085 | ||
1086 | # | |
1087 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1088 | # relocations required by build roots. This is not defined in the | |
1089 | # makefile but the argument can be passed to make if needed. | |
1090 | # | |
1091 | ||
1092 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
1093 | export MODLIB | |
1094 | ||
1095 | PHONY += prepare0 | |
1096 | ||
1097 | export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) | |
1098 | export MODORDER := $(extmod_prefix)modules.order | |
1099 | export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps | |
1100 | ||
1101 | ifeq ($(KBUILD_EXTMOD),) | |
1102 | ||
1103 | build-dir := . | |
1104 | clean-dirs := $(sort . Documentation \ | |
1105 | $(patsubst %/,%,$(filter %/, $(core-) \ | |
1106 | $(drivers-) $(libs-)))) | |
1107 | ||
1108 | export ARCH_CORE := $(core-y) | |
1109 | export ARCH_LIB := $(filter %/, $(libs-y)) | |
1110 | export ARCH_DRIVERS := $(drivers-y) $(drivers-m) | |
1111 | # Externally visible symbols (used by link-vmlinux.sh) | |
1112 | ||
1113 | KBUILD_VMLINUX_OBJS := ./built-in.a | |
1114 | ifdef CONFIG_MODULES | |
1115 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) | |
1116 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) | |
1117 | else | |
1118 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) | |
1119 | endif | |
1120 | ||
1121 | export KBUILD_VMLINUX_LIBS | |
1122 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
1123 | ||
1124 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1125 | # For the kernel to actually contain only the needed exported symbols, | |
1126 | # we have to build modules as well to determine what those symbols are. | |
1127 | KBUILD_MODULES := 1 | |
1128 | endif | |
1129 | ||
1130 | # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 | |
1131 | quiet_cmd_ar_vmlinux.a = AR $@ | |
1132 | cmd_ar_vmlinux.a = \ | |
1133 | rm -f $@; \ | |
1134 | $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ | |
1135 | $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) | |
1136 | ||
1137 | targets += vmlinux.a | |
1138 | vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE | |
1139 | $(call if_changed,ar_vmlinux.a) | |
1140 | ||
1141 | PHONY += vmlinux_o | |
1142 | vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) | |
1143 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o | |
1144 | ||
1145 | vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o | |
1146 | @: | |
1147 | ||
1148 | PHONY += vmlinux | |
1149 | # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, | |
1150 | # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is | |
1151 | # unrelated; the decompressors just happen to have the same base name, | |
1152 | # arch/*/boot/compressed/vmlinux. | |
1153 | # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. | |
1154 | # | |
1155 | # _LDFLAGS_vmlinux is a workaround for the 'private export' bug: | |
1156 | # https://savannah.gnu.org/bugs/?61463 | |
1157 | # For Make > 4.4, the following simple code will work: | |
1158 | # vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1159 | vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1160 | vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) | |
1161 | vmlinux: vmlinux.o $(KBUILD_LDS) modpost | |
1162 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux | |
1163 | ||
1164 | # The actual objects are generated when descending, | |
1165 | # make sure no implicit rule kicks in | |
1166 | $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; | |
1167 | ||
1168 | ifeq ($(origin KERNELRELEASE),file) | |
1169 | filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) | |
1170 | else | |
1171 | filechk_kernel.release = echo $(KERNELRELEASE) | |
1172 | endif | |
1173 | ||
1174 | # Store (new) KERNELRELEASE string in include/config/kernel.release | |
1175 | include/config/kernel.release: FORCE | |
1176 | $(call filechk,kernel.release) | |
1177 | ||
1178 | # Additional helpers built in scripts/ | |
1179 | # Carefully list dependencies so we do not try to build scripts twice | |
1180 | # in parallel | |
1181 | PHONY += scripts | |
1182 | scripts: scripts_basic scripts_dtc | |
1183 | $(Q)$(MAKE) $(build)=$(@) | |
1184 | ||
1185 | # Things we need to do before we recursively start building the kernel | |
1186 | # or the modules are listed in "prepare". | |
1187 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1188 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1189 | # version.h and scripts_basic is processed / created. | |
1190 | ||
1191 | PHONY += prepare archprepare | |
1192 | ||
1193 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ | |
1194 | asm-generic $(version_h) include/generated/utsrelease.h \ | |
1195 | include/generated/compile.h include/generated/autoconf.h remove-stale-files | |
1196 | ||
1197 | prepare0: archprepare | |
1198 | $(Q)$(MAKE) $(build)=scripts/mod | |
1199 | $(Q)$(MAKE) $(build)=. prepare | |
1200 | ||
1201 | # All the preparing.. | |
1202 | prepare: prepare0 | |
1203 | ifdef CONFIG_RUST | |
1204 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh | |
1205 | $(Q)$(MAKE) $(build)=rust | |
1206 | endif | |
1207 | ||
1208 | PHONY += remove-stale-files | |
1209 | remove-stale-files: | |
1210 | $(Q)$(srctree)/scripts/remove-stale-files | |
1211 | ||
1212 | # Support for using generic headers in asm-generic | |
1213 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj | |
1214 | ||
1215 | PHONY += asm-generic uapi-asm-generic | |
1216 | asm-generic: uapi-asm-generic | |
1217 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ | |
1218 | generic=include/asm-generic | |
1219 | uapi-asm-generic: | |
1220 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ | |
1221 | generic=include/uapi/asm-generic | |
1222 | ||
1223 | # Generate some files | |
1224 | # --------------------------------------------------------------------------- | |
1225 | ||
1226 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1227 | # needs to be updated, so this check is forced on all builds | |
1228 | ||
1229 | uts_len := 64 | |
1230 | define filechk_utsrelease.h | |
1231 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1232 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1233 | exit 1; \ | |
1234 | fi; \ | |
1235 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" | |
1236 | endef | |
1237 | ||
1238 | define filechk_version.h | |
1239 | if [ $(SUBLEVEL) -gt 255 ]; then \ | |
1240 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1241 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ | |
1242 | else \ | |
1243 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1244 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ | |
1245 | fi; \ | |
1246 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ | |
1247 | ((c) > 255 ? 255 : (c)))'; \ | |
1248 | echo \#define LINUX_VERSION_MAJOR $(VERSION); \ | |
1249 | echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ | |
1250 | echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) | |
1251 | endef | |
1252 | ||
1253 | $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) | |
1254 | $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) | |
1255 | $(version_h): FORCE | |
1256 | $(call filechk,version.h) | |
1257 | ||
1258 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1259 | $(call filechk,utsrelease.h) | |
1260 | ||
1261 | filechk_compile.h = $(srctree)/scripts/mkcompile_h \ | |
1262 | "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" | |
1263 | ||
1264 | include/generated/compile.h: FORCE | |
1265 | $(call filechk,compile.h) | |
1266 | ||
1267 | PHONY += headerdep | |
1268 | headerdep: | |
1269 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
1270 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
1271 | ||
1272 | # --------------------------------------------------------------------------- | |
1273 | # Kernel headers | |
1274 | ||
1275 | #Default location for installed headers | |
1276 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1277 | ||
1278 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include | |
1279 | cmd_headers_install = \ | |
1280 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1281 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1282 | usr/include $(INSTALL_HDR_PATH) | |
1283 | ||
1284 | PHONY += headers_install | |
1285 | headers_install: headers | |
1286 | $(call cmd,headers_install) | |
1287 | ||
1288 | PHONY += archheaders archscripts | |
1289 | ||
1290 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj | |
1291 | ||
1292 | PHONY += headers | |
1293 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
1294 | $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) | |
1295 | $(Q)$(MAKE) $(hdr-inst)=include/uapi | |
1296 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1297 | ||
1298 | ifdef CONFIG_HEADERS_INSTALL | |
1299 | prepare: headers | |
1300 | endif | |
1301 | ||
1302 | PHONY += scripts_unifdef | |
1303 | scripts_unifdef: scripts_basic | |
1304 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1305 | ||
1306 | # --------------------------------------------------------------------------- | |
1307 | # Install | |
1308 | ||
1309 | # Many distributions have the custom install script, /sbin/installkernel. | |
1310 | # If DKMS is installed, 'make install' will eventually recurse back | |
1311 | # to this Makefile to build and install external modules. | |
1312 | # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. | |
1313 | ||
1314 | quiet_cmd_install = INSTALL $(INSTALL_PATH) | |
1315 | cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh | |
1316 | ||
1317 | # --------------------------------------------------------------------------- | |
1318 | # vDSO install | |
1319 | ||
1320 | PHONY += vdso_install | |
1321 | vdso_install: export INSTALL_FILES = $(vdso-install-y) | |
1322 | vdso_install: | |
1323 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst | |
1324 | ||
1325 | # --------------------------------------------------------------------------- | |
1326 | # Tools | |
1327 | ||
1328 | ifdef CONFIG_OBJTOOL | |
1329 | prepare: tools/objtool | |
1330 | endif | |
1331 | ||
1332 | ifdef CONFIG_BPF | |
1333 | ifdef CONFIG_DEBUG_INFO_BTF | |
1334 | prepare: tools/bpf/resolve_btfids | |
1335 | endif | |
1336 | endif | |
1337 | ||
1338 | PHONY += resolve_btfids_clean | |
1339 | ||
1340 | resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids | |
1341 | ||
1342 | # tools/bpf/resolve_btfids directory might not exist | |
1343 | # in output directory, skip its clean in that case | |
1344 | resolve_btfids_clean: | |
1345 | ifneq ($(wildcard $(resolve_btfids_O)),) | |
1346 | $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean | |
1347 | endif | |
1348 | ||
1349 | # Clear a bunch of variables before executing the submake | |
1350 | ifeq ($(quiet),silent_) | |
1351 | tools_silent=s | |
1352 | endif | |
1353 | ||
1354 | tools/: FORCE | |
1355 | $(Q)mkdir -p $(objtree)/tools | |
1356 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ | |
1357 | ||
1358 | tools/%: FORCE | |
1359 | $(Q)mkdir -p $(objtree)/tools | |
1360 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* | |
1361 | ||
1362 | # --------------------------------------------------------------------------- | |
1363 | # Kernel selftest | |
1364 | ||
1365 | PHONY += kselftest | |
1366 | kselftest: headers | |
1367 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests | |
1368 | ||
1369 | kselftest-%: headers FORCE | |
1370 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* | |
1371 | ||
1372 | PHONY += kselftest-merge | |
1373 | kselftest-merge: | |
1374 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1375 | $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \ | |
1376 | xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config | |
1377 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1378 | ||
1379 | # --------------------------------------------------------------------------- | |
1380 | # Devicetree files | |
1381 | ||
1382 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1383 | dtstree := arch/$(SRCARCH)/boot/dts | |
1384 | endif | |
1385 | ||
1386 | ifneq ($(dtstree),) | |
1387 | ||
1388 | %.dtb: dtbs_prepare | |
1389 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1390 | ||
1391 | %.dtbo: dtbs_prepare | |
1392 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1393 | ||
1394 | PHONY += dtbs dtbs_prepare dtbs_install dtbs_check | |
1395 | dtbs: dtbs_prepare | |
1396 | $(Q)$(MAKE) $(build)=$(dtstree) | |
1397 | ||
1398 | # include/config/kernel.release is actually needed when installing DTBs because | |
1399 | # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make | |
1400 | # dtbs_install depend on it as dtbs_install may run as root. | |
1401 | dtbs_prepare: include/config/kernel.release scripts_dtc | |
1402 | ||
1403 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) | |
1404 | export CHECK_DTBS=y | |
1405 | endif | |
1406 | ||
1407 | ifneq ($(CHECK_DTBS),) | |
1408 | dtbs_prepare: dt_binding_check | |
1409 | endif | |
1410 | ||
1411 | dtbs_check: dtbs | |
1412 | ||
1413 | dtbs_install: | |
1414 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) | |
1415 | ||
1416 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1417 | all: dtbs | |
1418 | endif | |
1419 | ||
1420 | endif | |
1421 | ||
1422 | PHONY += scripts_dtc | |
1423 | scripts_dtc: scripts_basic | |
1424 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1425 | ||
1426 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) | |
1427 | export CHECK_DT_BINDING=y | |
1428 | endif | |
1429 | ||
1430 | PHONY += dt_binding_check | |
1431 | dt_binding_check: scripts_dtc | |
1432 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1433 | ||
1434 | PHONY += dt_compatible_check | |
1435 | dt_compatible_check: dt_binding_check | |
1436 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ | |
1437 | ||
1438 | # --------------------------------------------------------------------------- | |
1439 | # Modules | |
1440 | ||
1441 | ifdef CONFIG_MODULES | |
1442 | ||
1443 | # By default, build modules as well | |
1444 | ||
1445 | all: modules | |
1446 | ||
1447 | # When we're building modules with modversions, we need to consider | |
1448 | # the built-in objects during the descend as well, in order to | |
1449 | # make sure the checksums are up to date before we record them. | |
1450 | ifdef CONFIG_MODVERSIONS | |
1451 | KBUILD_BUILTIN := 1 | |
1452 | endif | |
1453 | ||
1454 | # Build modules | |
1455 | # | |
1456 | ||
1457 | # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES | |
1458 | # is an exception. | |
1459 | ifdef CONFIG_DEBUG_INFO_BTF_MODULES | |
1460 | KBUILD_BUILTIN := 1 | |
1461 | modules: vmlinux | |
1462 | endif | |
1463 | ||
1464 | modules: modules_prepare | |
1465 | ||
1466 | # Target to prepare building external modules | |
1467 | modules_prepare: prepare | |
1468 | $(Q)$(MAKE) $(build)=scripts scripts/module.lds | |
1469 | ||
1470 | endif # CONFIG_MODULES | |
1471 | ||
1472 | ### | |
1473 | # Cleaning is done on three levels. | |
1474 | # make clean Delete most generated files | |
1475 | # Leave enough to build external modules | |
1476 | # make mrproper Delete the current configuration, and all generated files | |
1477 | # make distclean Remove editor backup files, patch leftover files and the like | |
1478 | ||
1479 | # Directories & files removed with 'make clean' | |
1480 | CLEAN_FILES += vmlinux.symvers modules-only.symvers \ | |
1481 | modules.builtin modules.builtin.modinfo modules.nsdeps \ | |
1482 | compile_commands.json .thinlto-cache rust/test \ | |
1483 | rust-project.json .vmlinux.objs .vmlinux.export.c | |
1484 | ||
1485 | # Directories & files removed with 'make mrproper' | |
1486 | MRPROPER_FILES += include/config include/generated \ | |
1487 | arch/$(SRCARCH)/include/generated .objdiff \ | |
1488 | debian snap tar-install \ | |
1489 | .config .config.old .version \ | |
1490 | Module.symvers \ | |
1491 | certs/signing_key.pem \ | |
1492 | certs/x509.genkey \ | |
1493 | vmlinux-gdb.py \ | |
1494 | rpmbuild \ | |
1495 | rust/libmacros.so | |
1496 | ||
1497 | # clean - Delete most, but leave enough to build external modules | |
1498 | # | |
1499 | clean: rm-files := $(CLEAN_FILES) | |
1500 | ||
1501 | PHONY += archclean vmlinuxclean | |
1502 | ||
1503 | vmlinuxclean: | |
1504 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1505 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) | |
1506 | ||
1507 | clean: archclean vmlinuxclean resolve_btfids_clean | |
1508 | ||
1509 | # mrproper - Delete all generated files, including .config | |
1510 | # | |
1511 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1512 | mrproper-dirs := $(addprefix _mrproper_,scripts) | |
1513 | ||
1514 | PHONY += $(mrproper-dirs) mrproper | |
1515 | $(mrproper-dirs): | |
1516 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1517 | ||
1518 | mrproper: clean $(mrproper-dirs) | |
1519 | $(call cmd,rmfiles) | |
1520 | @find . $(RCS_FIND_IGNORE) \ | |
1521 | \( -name '*.rmeta' \) \ | |
1522 | -type f -print | xargs rm -f | |
1523 | ||
1524 | # distclean | |
1525 | # | |
1526 | PHONY += distclean | |
1527 | ||
1528 | distclean: mrproper | |
1529 | @find . $(RCS_FIND_IGNORE) \ | |
1530 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1531 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ | |
1532 | -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ | |
1533 | -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ | |
1534 | -type f -print | xargs rm -f | |
1535 | ||
1536 | ||
1537 | # Packaging of the kernel to various formats | |
1538 | # --------------------------------------------------------------------------- | |
1539 | ||
1540 | %src-pkg: FORCE | |
1541 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1542 | %pkg: include/config/kernel.release FORCE | |
1543 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1544 | ||
1545 | # Brief documentation of the typical targets used | |
1546 | # --------------------------------------------------------------------------- | |
1547 | ||
1548 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1549 | boards := $(sort $(notdir $(boards))) | |
1550 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1551 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1552 | ||
1553 | PHONY += help | |
1554 | help: | |
1555 | @echo 'Cleaning targets:' | |
1556 | @echo ' clean - Remove most generated files but keep the config and' | |
1557 | @echo ' enough build support to build external modules' | |
1558 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1559 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1560 | @echo '' | |
1561 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1562 | @echo '' | |
1563 | @echo 'Other generic targets:' | |
1564 | @echo ' all - Build all targets marked with [*]' | |
1565 | @echo '* vmlinux - Build the bare kernel' | |
1566 | @echo '* modules - Build all modules' | |
1567 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1568 | @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)' | |
1569 | @echo ' dir/ - Build all files in dir and below' | |
1570 | @echo ' dir/file.[ois] - Build specified target only' | |
1571 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1572 | @echo ' (requires compiler support for LLVM assembly generation)' | |
1573 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1574 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1575 | @echo ' dir/file.ko - Build module including final link' | |
1576 | @echo ' modules_prepare - Set up for building external modules' | |
1577 | @echo ' tags/TAGS - Generate tags file for editors' | |
1578 | @echo ' cscope - Generate cscope index' | |
1579 | @echo ' gtags - Generate GNU GLOBAL index' | |
1580 | @echo ' kernelrelease - Output the release version string (use with make -s)' | |
1581 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1582 | @echo ' image_name - Output the image name (use with make -s)' | |
1583 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1584 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1585 | echo '' | |
1586 | @echo 'Static analysers:' | |
1587 | @echo ' checkstack - Generate a list of stack hogs and consider all functions' | |
1588 | @echo ' with a stack size larger than MINSTACKSIZE (default: 100)' | |
1589 | @echo ' versioncheck - Sanity check on version.h usage' | |
1590 | @echo ' includecheck - Check for duplicate included header files' | |
1591 | @echo ' export_report - List the usages of all exported symbols' | |
1592 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1593 | @echo ' coccicheck - Check with Coccinelle' | |
1594 | @echo ' clang-analyzer - Check with clang static analyzer' | |
1595 | @echo ' clang-tidy - Check with clang-tidy' | |
1596 | @echo '' | |
1597 | @echo 'Tools:' | |
1598 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1599 | @echo '' | |
1600 | @echo 'Kernel selftest:' | |
1601 | @echo ' kselftest - Build and run kernel selftest' | |
1602 | @echo ' Build, install, and boot kernel before' | |
1603 | @echo ' running kselftest on it' | |
1604 | @echo ' Run as root for full coverage' | |
1605 | @echo ' kselftest-all - Build kernel selftest' | |
1606 | @echo ' kselftest-install - Build and install kernel selftest' | |
1607 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1608 | @echo ' kselftest-merge - Merge all the config dependencies of' | |
1609 | @echo ' kselftest to existing .config.' | |
1610 | @echo '' | |
1611 | @echo 'Rust targets:' | |
1612 | @echo ' rustavailable - Checks whether the Rust toolchain is' | |
1613 | @echo ' available and, if not, explains why.' | |
1614 | @echo ' rustfmt - Reformat all the Rust code in the kernel' | |
1615 | @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' | |
1616 | @echo ' is formatted, printing a diff otherwise.' | |
1617 | @echo ' rustdoc - Generate Rust documentation' | |
1618 | @echo ' (requires kernel .config)' | |
1619 | @echo ' rusttest - Runs the Rust tests' | |
1620 | @echo ' (requires kernel .config; downloads external repos)' | |
1621 | @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' | |
1622 | @echo ' (requires kernel .config)' | |
1623 | @echo ' dir/file.[os] - Build specified target only' | |
1624 | @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' | |
1625 | @echo ' Run with RUSTFMT=n to skip reformatting if needed.' | |
1626 | @echo ' The output is not intended to be compilable.' | |
1627 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1628 | @echo '' | |
1629 | @$(if $(dtstree), \ | |
1630 | echo 'Devicetree:'; \ | |
1631 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1632 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1633 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1634 | echo ' dtbs_check - Validate device tree source files';\ | |
1635 | echo '') | |
1636 | ||
1637 | @echo 'Userspace tools targets:' | |
1638 | @echo ' use "make tools/help"' | |
1639 | @echo ' or "cd tools; make help"' | |
1640 | @echo '' | |
1641 | @echo 'Kernel packaging:' | |
1642 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help | |
1643 | @echo '' | |
1644 | @echo 'Documentation targets:' | |
1645 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp | |
1646 | @echo '' | |
1647 | @echo 'Architecture-specific targets ($(SRCARCH)):' | |
1648 | @$(or $(archhelp),\ | |
1649 | echo ' No architecture-specific help defined for $(SRCARCH)') | |
1650 | @echo '' | |
1651 | @$(if $(boards), \ | |
1652 | $(foreach b, $(boards), \ | |
1653 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1654 | echo '') | |
1655 | @$(if $(board-dirs), \ | |
1656 | $(foreach b, $(board-dirs), \ | |
1657 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1658 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1659 | echo '') | |
1660 | ||
1661 | @echo ' make V=n [targets] 1: verbose build' | |
1662 | @echo ' 2: give reason for rebuild of target' | |
1663 | @echo ' V=1 and V=2 can be combined with V=12' | |
1664 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1665 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' | |
1666 | @echo ' (sparse by default)' | |
1667 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1668 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1669 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3,c,e where' | |
1670 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1671 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1672 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1673 | @echo ' c: extra checks in the configuration stage (Kconfig)' | |
1674 | @echo ' e: warnings are being treated as errors' | |
1675 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1676 | @$(if $(dtstree), \ | |
1677 | echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ | |
1678 | echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ | |
1679 | ) | |
1680 | @echo '' | |
1681 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1682 | @echo 'For further info see the ./README file' | |
1683 | ||
1684 | ||
1685 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1686 | ||
1687 | help-boards: $(help-board-dirs) | |
1688 | ||
1689 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) | |
1690 | ||
1691 | $(help-board-dirs): help-%: | |
1692 | @echo 'Architecture-specific targets ($(SRCARCH) $*):' | |
1693 | @$(if $(boards-per-dir), \ | |
1694 | $(foreach b, $(boards-per-dir), \ | |
1695 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1696 | echo '') | |
1697 | ||
1698 | ||
1699 | # Documentation targets | |
1700 | # --------------------------------------------------------------------------- | |
1701 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ | |
1702 | linkcheckdocs dochelp refcheckdocs texinfodocs infodocs | |
1703 | PHONY += $(DOC_TARGETS) | |
1704 | $(DOC_TARGETS): | |
1705 | $(Q)$(MAKE) $(build)=Documentation $@ | |
1706 | ||
1707 | ||
1708 | # Rust targets | |
1709 | # --------------------------------------------------------------------------- | |
1710 | ||
1711 | # "Is Rust available?" target | |
1712 | PHONY += rustavailable | |
1713 | rustavailable: | |
1714 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" | |
1715 | ||
1716 | # Documentation target | |
1717 | # | |
1718 | # Using the singular to avoid running afoul of `no-dot-config-targets`. | |
1719 | PHONY += rustdoc | |
1720 | rustdoc: prepare | |
1721 | $(Q)$(MAKE) $(build)=rust $@ | |
1722 | ||
1723 | # Testing target | |
1724 | PHONY += rusttest | |
1725 | rusttest: prepare | |
1726 | $(Q)$(MAKE) $(build)=rust $@ | |
1727 | ||
1728 | # Formatting targets | |
1729 | PHONY += rustfmt rustfmtcheck | |
1730 | ||
1731 | # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. | |
1732 | # | |
1733 | # We match using absolute paths since `find` does not resolve them | |
1734 | # when matching, which is a problem when e.g. `srctree` is `..`. | |
1735 | # We `grep` afterwards in order to remove the directory entry itself. | |
1736 | rustfmt: | |
1737 | $(Q)find $(abs_srctree) -type f -name '*.rs' \ | |
1738 | -o -path $(abs_srctree)/rust/alloc -prune \ | |
1739 | -o -path $(abs_objtree)/rust/test -prune \ | |
1740 | | grep -Fv $(abs_srctree)/rust/alloc \ | |
1741 | | grep -Fv $(abs_objtree)/rust/test \ | |
1742 | | grep -Fv generated \ | |
1743 | | xargs $(RUSTFMT) $(rustfmt_flags) | |
1744 | ||
1745 | rustfmtcheck: rustfmt_flags = --check | |
1746 | rustfmtcheck: rustfmt | |
1747 | ||
1748 | # Misc | |
1749 | # --------------------------------------------------------------------------- | |
1750 | ||
1751 | PHONY += misc-check | |
1752 | misc-check: | |
1753 | $(Q)$(srctree)/scripts/misc-check | |
1754 | ||
1755 | all: misc-check | |
1756 | ||
1757 | PHONY += scripts_gdb | |
1758 | scripts_gdb: prepare0 | |
1759 | $(Q)$(MAKE) $(build)=scripts/gdb | |
1760 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1761 | ||
1762 | ifdef CONFIG_GDB_SCRIPTS | |
1763 | all: scripts_gdb | |
1764 | endif | |
1765 | ||
1766 | else # KBUILD_EXTMOD | |
1767 | ||
1768 | filechk_kernel.release = echo $(KERNELRELEASE) | |
1769 | ||
1770 | ### | |
1771 | # External module support. | |
1772 | # When building external modules the kernel used as basis is considered | |
1773 | # read-only, and no consistency checks are made and the make | |
1774 | # system is not used on the basis kernel. If updates are required | |
1775 | # in the basis kernel ordinary make commands (without M=...) must be used. | |
1776 | ||
1777 | # We are always building only modules. | |
1778 | KBUILD_BUILTIN := | |
1779 | KBUILD_MODULES := 1 | |
1780 | ||
1781 | build-dir := $(KBUILD_EXTMOD) | |
1782 | ||
1783 | compile_commands.json: $(extmod_prefix)compile_commands.json | |
1784 | PHONY += compile_commands.json | |
1785 | ||
1786 | clean-dirs := $(KBUILD_EXTMOD) | |
1787 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ | |
1788 | $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache | |
1789 | ||
1790 | PHONY += prepare | |
1791 | # now expand this into a simple variable to reduce the cost of shell evaluations | |
1792 | prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) | |
1793 | prepare: | |
1794 | @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ | |
1795 | echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ | |
1796 | echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ | |
1797 | echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ | |
1798 | fi | |
1799 | ||
1800 | PHONY += help | |
1801 | help: | |
1802 | @echo ' Building external modules.' | |
1803 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1804 | @echo '' | |
1805 | @echo ' modules - default target, build the module(s)' | |
1806 | @echo ' modules_install - install the module' | |
1807 | @echo ' clean - remove generated files in module directory only' | |
1808 | @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file' | |
1809 | @echo '' | |
1810 | ||
1811 | ifndef CONFIG_MODULES | |
1812 | modules modules_install: __external_modules_error | |
1813 | __external_modules_error: | |
1814 | @echo >&2 '***' | |
1815 | @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' | |
1816 | @echo >&2 '*** You cannot build or install external modules.' | |
1817 | @echo >&2 '***' | |
1818 | @false | |
1819 | endif | |
1820 | ||
1821 | endif # KBUILD_EXTMOD | |
1822 | ||
1823 | # --------------------------------------------------------------------------- | |
1824 | # Modules | |
1825 | ||
1826 | PHONY += modules modules_install modules_sign modules_prepare | |
1827 | ||
1828 | modules_install: | |
1829 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \ | |
1830 | sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y) | |
1831 | ||
1832 | ifeq ($(CONFIG_MODULE_SIG),y) | |
1833 | # modules_sign is a subset of modules_install. | |
1834 | # 'make modules_install modules_sign' is equivalent to 'make modules_install'. | |
1835 | modules_sign: modules_install | |
1836 | @: | |
1837 | else | |
1838 | modules_sign: | |
1839 | @echo >&2 '***' | |
1840 | @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.' | |
1841 | @echo >&2 '***' | |
1842 | @false | |
1843 | endif | |
1844 | ||
1845 | ifdef CONFIG_MODULES | |
1846 | ||
1847 | $(MODORDER): $(build-dir) | |
1848 | @: | |
1849 | ||
1850 | # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. | |
1851 | # This is solely useful to speed up test compiles. | |
1852 | modules: modpost | |
1853 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) | |
1854 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
1855 | endif | |
1856 | ||
1857 | PHONY += modules_check | |
1858 | modules_check: $(MODORDER) | |
1859 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< | |
1860 | ||
1861 | else # CONFIG_MODULES | |
1862 | ||
1863 | modules: | |
1864 | @: | |
1865 | ||
1866 | KBUILD_MODULES := | |
1867 | ||
1868 | endif # CONFIG_MODULES | |
1869 | ||
1870 | PHONY += modpost | |
1871 | modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ | |
1872 | $(if $(KBUILD_MODULES), modules_check) | |
1873 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1874 | ||
1875 | # Single targets | |
1876 | # --------------------------------------------------------------------------- | |
1877 | # To build individual files in subdirectories, you can do like this: | |
1878 | # | |
1879 | # make foo/bar/baz.s | |
1880 | # | |
1881 | # The supported suffixes for single-target are listed in 'single-targets' | |
1882 | # | |
1883 | # To build only under specific subdirectories, you can do like this: | |
1884 | # | |
1885 | # make foo/bar/baz/ | |
1886 | ||
1887 | ifdef single-build | |
1888 | ||
1889 | # .ko is special because modpost is needed | |
1890 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
1891 | single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ | |
1892 | $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) | |
1893 | ||
1894 | $(single-ko): single_modules | |
1895 | @: | |
1896 | $(single-no-ko): $(build-dir) | |
1897 | @: | |
1898 | ||
1899 | # Remove MODORDER when done because it is not the real one. | |
1900 | PHONY += single_modules | |
1901 | single_modules: $(single-no-ko) modules_prepare | |
1902 | $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) | |
1903 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1904 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) | |
1905 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
1906 | endif | |
1907 | $(Q)rm -f $(MODORDER) | |
1908 | ||
1909 | single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) | |
1910 | ||
1911 | KBUILD_MODULES := 1 | |
1912 | ||
1913 | endif | |
1914 | ||
1915 | # Preset locale variables to speed up the build process. Limit locale | |
1916 | # tweaks to this spot to avoid wrong language settings when running | |
1917 | # make menuconfig etc. | |
1918 | # Error messages still appears in the original language | |
1919 | PHONY += $(build-dir) | |
1920 | $(build-dir): prepare | |
1921 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) | |
1922 | ||
1923 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) | |
1924 | PHONY += $(clean-dirs) clean | |
1925 | $(clean-dirs): | |
1926 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1927 | ||
1928 | clean: $(clean-dirs) | |
1929 | $(call cmd,rmfiles) | |
1930 | @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1931 | \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ | |
1932 | -o -name '*.ko.*' \ | |
1933 | -o -name '*.dtb' -o -name '*.dtbo' \ | |
1934 | -o -name '*.dtb.S' -o -name '*.dtbo.S' \ | |
1935 | -o -name '*.dt.yaml' \ | |
1936 | -o -name '*.dwo' -o -name '*.lst' \ | |
1937 | -o -name '*.su' -o -name '*.mod' \ | |
1938 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1939 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ | |
1940 | -o -name '*.asn1.[ch]' \ | |
1941 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1942 | -o -name '*.c.[012]*.*' \ | |
1943 | -o -name '*.ll' \ | |
1944 | -o -name '*.gcno' \ | |
1945 | -o -name '*.*.symversions' \) -type f -print \ | |
1946 | -o -name '.tmp_*' -print \ | |
1947 | | xargs rm -rf | |
1948 | ||
1949 | # Generate tags for editors | |
1950 | # --------------------------------------------------------------------------- | |
1951 | quiet_cmd_tags = GEN $@ | |
1952 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ | |
1953 | ||
1954 | tags TAGS cscope gtags: FORCE | |
1955 | $(call cmd,tags) | |
1956 | ||
1957 | # IDE support targets | |
1958 | PHONY += rust-analyzer | |
1959 | rust-analyzer: | |
1960 | $(Q)$(MAKE) $(build)=rust $@ | |
1961 | ||
1962 | # Script to generate missing namespace dependencies | |
1963 | # --------------------------------------------------------------------------- | |
1964 | ||
1965 | PHONY += nsdeps | |
1966 | nsdeps: export KBUILD_NSDEPS=1 | |
1967 | nsdeps: modules | |
1968 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps | |
1969 | ||
1970 | # Clang Tooling | |
1971 | # --------------------------------------------------------------------------- | |
1972 | ||
1973 | quiet_cmd_gen_compile_commands = GEN $@ | |
1974 | cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) | |
1975 | ||
1976 | $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ | |
1977 | $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ | |
1978 | $(if $(CONFIG_MODULES), $(MODORDER)) FORCE | |
1979 | $(call if_changed,gen_compile_commands) | |
1980 | ||
1981 | targets += $(extmod_prefix)compile_commands.json | |
1982 | ||
1983 | PHONY += clang-tidy clang-analyzer | |
1984 | ||
1985 | ifdef CONFIG_CC_IS_CLANG | |
1986 | quiet_cmd_clang_tools = CHECK $< | |
1987 | cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< | |
1988 | ||
1989 | clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json | |
1990 | $(call cmd,clang_tools) | |
1991 | else | |
1992 | clang-tidy clang-analyzer: | |
1993 | @echo "$@ requires CC=clang" >&2 | |
1994 | @false | |
1995 | endif | |
1996 | ||
1997 | # Scripts to check various things for consistency | |
1998 | # --------------------------------------------------------------------------- | |
1999 | ||
2000 | PHONY += includecheck versioncheck coccicheck export_report | |
2001 | ||
2002 | includecheck: | |
2003 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
2004 | -name '*.[hcS]' -type f -print | sort \ | |
2005 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
2006 | ||
2007 | versioncheck: | |
2008 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
2009 | -name '*.[hcS]' -type f -print | sort \ | |
2010 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
2011 | ||
2012 | coccicheck: | |
2013 | $(Q)$(BASH) $(srctree)/scripts/$@ | |
2014 | ||
2015 | export_report: | |
2016 | $(PERL) $(srctree)/scripts/export_report.pl | |
2017 | ||
2018 | PHONY += checkstack kernelrelease kernelversion image_name | |
2019 | ||
2020 | # UML needs a little special treatment here. It wants to use the host | |
2021 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
2022 | # else wants $(ARCH), including people doing cross-builds, which means | |
2023 | # that $(SUBARCH) doesn't work here. | |
2024 | ifeq ($(ARCH), um) | |
2025 | CHECKSTACK_ARCH := $(SUBARCH) | |
2026 | else | |
2027 | CHECKSTACK_ARCH := $(ARCH) | |
2028 | endif | |
2029 | MINSTACKSIZE ?= 100 | |
2030 | checkstack: | |
2031 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
2032 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) $(MINSTACKSIZE) | |
2033 | ||
2034 | kernelrelease: | |
2035 | @$(filechk_kernel.release) | |
2036 | ||
2037 | kernelversion: | |
2038 | @echo $(KERNELVERSION) | |
2039 | ||
2040 | image_name: | |
2041 | @echo $(KBUILD_IMAGE) | |
2042 | ||
2043 | PHONY += run-command | |
2044 | run-command: | |
2045 | $(Q)$(KBUILD_RUN_COMMAND) | |
2046 | ||
2047 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
2048 | cmd_rmfiles = rm -rf $(rm-files) | |
2049 | ||
2050 | # read saved command lines for existing targets | |
2051 | existing-targets := $(wildcard $(sort $(targets))) | |
2052 | ||
2053 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
2054 | ||
2055 | endif # config-build | |
2056 | endif # mixed-build | |
2057 | endif # need-sub-make | |
2058 | ||
2059 | PHONY += FORCE | |
2060 | FORCE: | |
2061 | ||
2062 | # Declare the contents of the PHONY variable as phony. We keep that | |
2063 | # information in a variable so we can use it in if_changed and friends. | |
2064 | .PHONY: $(PHONY) |