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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | VERSION = 5 | |
3 | PATCHLEVEL = 15 | |
4 | SUBLEVEL = 39 | |
5 | EXTRAVERSION = | |
6 | NAME = Trick or Treat | |
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 | $(if $(filter __%, $(MAKECMDGOALS)), \ | |
15 | $(error targets prefixed with '__' are only for internal use)) | |
16 | ||
17 | # That's our default target when none is given on the command line | |
18 | PHONY := __all | |
19 | __all: | |
20 | ||
21 | # We are using a recursive build, so we need to do a little thinking | |
22 | # to get the ordering right. | |
23 | # | |
24 | # Most importantly: sub-Makefiles should only ever modify files in | |
25 | # their own directory. If in some directory we have a dependency on | |
26 | # a file in another dir (which doesn't happen often, but it's often | |
27 | # unavoidable when linking the built-in.a targets which finally | |
28 | # turn into vmlinux), we will call a sub make in that other dir, and | |
29 | # after that we are sure that everything which is in that other dir | |
30 | # is now up to date. | |
31 | # | |
32 | # The only cases where we need to modify files which have global | |
33 | # effects are thus separated out and done before the recursive | |
34 | # descending is started. They are now explicitly listed as the | |
35 | # prepare rule. | |
36 | ||
37 | ifneq ($(sub_make_done),1) | |
38 | ||
39 | # Do not use make's built-in rules and variables | |
40 | # (this increases performance and avoids hard-to-debug behaviour) | |
41 | MAKEFLAGS += -rR | |
42 | ||
43 | # Avoid funny character set dependencies | |
44 | unexport LC_ALL | |
45 | LC_COLLATE=C | |
46 | LC_NUMERIC=C | |
47 | export LC_COLLATE LC_NUMERIC | |
48 | ||
49 | # Avoid interference with shell env settings | |
50 | unexport GREP_OPTIONS | |
51 | ||
52 | # Beautify output | |
53 | # --------------------------------------------------------------------------- | |
54 | # | |
55 | # Normally, we echo the whole command before executing it. By making | |
56 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
57 | # $(quiet) to choose other forms of output instead, e.g. | |
58 | # | |
59 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
60 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
61 | # | |
62 | # If $(quiet) is empty, the whole command will be printed. | |
63 | # If it is set to "quiet_", only the short version will be printed. | |
64 | # If it is set to "silent_", nothing will be printed at all, since | |
65 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
66 | # | |
67 | # A simple variant is to prefix commands with $(Q) - that's useful | |
68 | # for commands that shall be hidden in non-verbose mode. | |
69 | # | |
70 | # $(Q)ln $@ :< | |
71 | # | |
72 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
73 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
74 | # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. | |
75 | # | |
76 | # To put more focus on warnings, be less verbose as default | |
77 | # Use 'make V=1' to see the full commands | |
78 | ||
79 | ifeq ("$(origin V)", "command line") | |
80 | KBUILD_VERBOSE = $(V) | |
81 | endif | |
82 | ifndef KBUILD_VERBOSE | |
83 | KBUILD_VERBOSE = 0 | |
84 | endif | |
85 | ||
86 | ifeq ($(KBUILD_VERBOSE),1) | |
87 | quiet = | |
88 | Q = | |
89 | else | |
90 | quiet=quiet_ | |
91 | Q = @ | |
92 | endif | |
93 | ||
94 | # If the user is running make -s (silent mode), suppress echoing of | |
95 | # commands | |
96 | ||
97 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) | |
98 | quiet=silent_ | |
99 | KBUILD_VERBOSE = 0 | |
100 | endif | |
101 | ||
102 | export quiet Q KBUILD_VERBOSE | |
103 | ||
104 | # Call a source code checker (by default, "sparse") as part of the | |
105 | # C compilation. | |
106 | # | |
107 | # Use 'make C=1' to enable checking of only re-compiled files. | |
108 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
109 | # of whether they are re-compiled or not. | |
110 | # | |
111 | # See the file "Documentation/dev-tools/sparse.rst" for more details, | |
112 | # including where to get the "sparse" utility. | |
113 | ||
114 | ifeq ("$(origin C)", "command line") | |
115 | KBUILD_CHECKSRC = $(C) | |
116 | endif | |
117 | ifndef KBUILD_CHECKSRC | |
118 | KBUILD_CHECKSRC = 0 | |
119 | endif | |
120 | ||
121 | export KBUILD_CHECKSRC | |
122 | ||
123 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the | |
124 | # directory of external module to build. Setting M= takes precedence. | |
125 | ifeq ("$(origin M)", "command line") | |
126 | KBUILD_EXTMOD := $(M) | |
127 | endif | |
128 | ||
129 | $(if $(word 2, $(KBUILD_EXTMOD)), \ | |
130 | $(error building multiple external modules is not supported)) | |
131 | ||
132 | # Remove trailing slashes | |
133 | ifneq ($(filter %/, $(KBUILD_EXTMOD)),) | |
134 | KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) | |
135 | endif | |
136 | ||
137 | export KBUILD_EXTMOD | |
138 | ||
139 | # Kbuild will save output files in the current working directory. | |
140 | # This does not need to match to the root of the kernel source tree. | |
141 | # | |
142 | # For example, you can do this: | |
143 | # | |
144 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
145 | # | |
146 | # If you want to save output files in a different location, there are | |
147 | # two syntaxes to specify it. | |
148 | # | |
149 | # 1) O= | |
150 | # Use "make O=dir/to/store/output/files/" | |
151 | # | |
152 | # 2) Set KBUILD_OUTPUT | |
153 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. | |
154 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
155 | # | |
156 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
157 | # variable. | |
158 | ||
159 | # Do we want to change the working directory? | |
160 | ifeq ("$(origin O)", "command line") | |
161 | KBUILD_OUTPUT := $(O) | |
162 | endif | |
163 | ||
164 | ifneq ($(KBUILD_OUTPUT),) | |
165 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
166 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
167 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
168 | $(if $(abs_objtree),, \ | |
169 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
170 | ||
171 | # $(realpath ...) resolves symlinks | |
172 | abs_objtree := $(realpath $(abs_objtree)) | |
173 | else | |
174 | abs_objtree := $(CURDIR) | |
175 | endif # ifneq ($(KBUILD_OUTPUT),) | |
176 | ||
177 | ifeq ($(abs_objtree),$(CURDIR)) | |
178 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
179 | MAKEFLAGS += --no-print-directory | |
180 | else | |
181 | need-sub-make := 1 | |
182 | endif | |
183 | ||
184 | this-makefile := $(lastword $(MAKEFILE_LIST)) | |
185 | abs_srctree := $(realpath $(dir $(this-makefile))) | |
186 | ||
187 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) | |
188 | $(error source directory cannot contain spaces or colons) | |
189 | endif | |
190 | ||
191 | ifneq ($(abs_srctree),$(abs_objtree)) | |
192 | # Look for make include files relative to root of kernel src | |
193 | # | |
194 | # --included-dir is added for backward compatibility, but you should not rely on | |
195 | # it. Please add $(srctree)/ prefix to include Makefiles in the source tree. | |
196 | MAKEFLAGS += --include-dir=$(abs_srctree) | |
197 | endif | |
198 | ||
199 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) | |
200 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
201 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
202 | need-sub-make := 1 | |
203 | # Cancel implicit rules for this Makefile. | |
204 | $(this-makefile): ; | |
205 | endif | |
206 | ||
207 | export abs_srctree abs_objtree | |
208 | export sub_make_done := 1 | |
209 | ||
210 | ifeq ($(need-sub-make),1) | |
211 | ||
212 | PHONY += $(MAKECMDGOALS) __sub-make | |
213 | ||
214 | $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make | |
215 | @: | |
216 | ||
217 | # Invoke a second make in the output directory, passing relevant variables | |
218 | __sub-make: | |
219 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) | |
220 | ||
221 | endif # need-sub-make | |
222 | endif # sub_make_done | |
223 | ||
224 | # We process the rest of the Makefile if this is the final invocation of make | |
225 | ifeq ($(need-sub-make),) | |
226 | ||
227 | # Do not print "Entering directory ...", | |
228 | # but we want to display it when entering to the output directory | |
229 | # so that IDEs/editors are able to understand relative filenames. | |
230 | MAKEFLAGS += --no-print-directory | |
231 | ||
232 | ifeq ($(abs_srctree),$(abs_objtree)) | |
233 | # building in the source tree | |
234 | srctree := . | |
235 | building_out_of_srctree := | |
236 | else | |
237 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) | |
238 | # building in a subdirectory of the source tree | |
239 | srctree := .. | |
240 | else | |
241 | srctree := $(abs_srctree) | |
242 | endif | |
243 | building_out_of_srctree := 1 | |
244 | endif | |
245 | ||
246 | ifneq ($(KBUILD_ABS_SRCTREE),) | |
247 | srctree := $(abs_srctree) | |
248 | endif | |
249 | ||
250 | objtree := . | |
251 | VPATH := $(srctree) | |
252 | ||
253 | export building_out_of_srctree srctree objtree VPATH | |
254 | ||
255 | # To make sure we do not include .config for any of the *config targets | |
256 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
257 | # It is allowed to specify more targets when calling make, including | |
258 | # mixing *config targets and build targets. | |
259 | # For example 'make oldconfig all'. | |
260 | # Detect when mixed targets is specified, and make a second invocation | |
261 | # of make so .config is not included in this case either (for *config). | |
262 | ||
263 | version_h := include/generated/uapi/linux/version.h | |
264 | ||
265 | clean-targets := %clean mrproper cleandocs | |
266 | no-dot-config-targets := $(clean-targets) \ | |
267 | cscope gtags TAGS tags help% %docs check% coccicheck \ | |
268 | $(version_h) headers headers_% archheaders archscripts \ | |
269 | %asm-generic kernelversion %src-pkg dt_binding_check \ | |
270 | outputmakefile | |
271 | # Installation targets should not require compiler. Unfortunately, vdso_install | |
272 | # is an exception where build artifacts may be updated. This must be fixed. | |
273 | no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ | |
274 | headers_install modules_install kernelrelease image_name | |
275 | no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ | |
276 | image_name | |
277 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ | |
278 | ||
279 | config-build := | |
280 | mixed-build := | |
281 | need-config := 1 | |
282 | need-compiler := 1 | |
283 | may-sync-config := 1 | |
284 | single-build := | |
285 | ||
286 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
287 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
288 | need-config := | |
289 | endif | |
290 | endif | |
291 | ||
292 | ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) | |
293 | ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) | |
294 | need-compiler := | |
295 | endif | |
296 | endif | |
297 | ||
298 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
299 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
300 | may-sync-config := | |
301 | endif | |
302 | endif | |
303 | ||
304 | ifneq ($(KBUILD_EXTMOD),) | |
305 | may-sync-config := | |
306 | endif | |
307 | ||
308 | ifeq ($(KBUILD_EXTMOD),) | |
309 | ifneq ($(filter %config,$(MAKECMDGOALS)),) | |
310 | config-build := 1 | |
311 | ifneq ($(words $(MAKECMDGOALS)),1) | |
312 | mixed-build := 1 | |
313 | endif | |
314 | endif | |
315 | endif | |
316 | ||
317 | # We cannot build single targets and the others at the same time | |
318 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
319 | single-build := 1 | |
320 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
321 | mixed-build := 1 | |
322 | endif | |
323 | endif | |
324 | ||
325 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
326 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
327 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
328 | mixed-build := 1 | |
329 | endif | |
330 | endif | |
331 | ||
332 | # install and modules_install need also be processed one by one | |
333 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
334 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
335 | mixed-build := 1 | |
336 | endif | |
337 | endif | |
338 | ||
339 | ifdef mixed-build | |
340 | # =========================================================================== | |
341 | # We're called with mixed targets (*config and build targets). | |
342 | # Handle them one by one. | |
343 | ||
344 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
345 | ||
346 | $(MAKECMDGOALS): __build_one_by_one | |
347 | @: | |
348 | ||
349 | __build_one_by_one: | |
350 | $(Q)set -e; \ | |
351 | for i in $(MAKECMDGOALS); do \ | |
352 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
353 | done | |
354 | ||
355 | else # !mixed-build | |
356 | ||
357 | include $(srctree)/scripts/Kbuild.include | |
358 | ||
359 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
360 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
361 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
362 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
363 | ||
364 | include $(srctree)/scripts/subarch.include | |
365 | ||
366 | # Cross compiling and selecting different set of gcc/bin-utils | |
367 | # --------------------------------------------------------------------------- | |
368 | # | |
369 | # When performing cross compilation for other architectures ARCH shall be set | |
370 | # to the target architecture. (See arch/* for the possibilities). | |
371 | # ARCH can be set during invocation of make: | |
372 | # make ARCH=ia64 | |
373 | # Another way is to have ARCH set in the environment. | |
374 | # The default ARCH is the host where make is executed. | |
375 | ||
376 | # CROSS_COMPILE specify the prefix used for all executables used | |
377 | # during compilation. Only gcc and related bin-utils executables | |
378 | # are prefixed with $(CROSS_COMPILE). | |
379 | # CROSS_COMPILE can be set on the command line | |
380 | # make CROSS_COMPILE=ia64-linux- | |
381 | # Alternatively CROSS_COMPILE can be set in the environment. | |
382 | # Default value for CROSS_COMPILE is not to prefix executables | |
383 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
384 | ARCH ?= $(SUBARCH) | |
385 | ||
386 | # Architecture as present in compile.h | |
387 | UTS_MACHINE := $(ARCH) | |
388 | SRCARCH := $(ARCH) | |
389 | ||
390 | # Additional ARCH settings for x86 | |
391 | ifeq ($(ARCH),i386) | |
392 | SRCARCH := x86 | |
393 | endif | |
394 | ifeq ($(ARCH),x86_64) | |
395 | SRCARCH := x86 | |
396 | endif | |
397 | ||
398 | # Additional ARCH settings for sparc | |
399 | ifeq ($(ARCH),sparc32) | |
400 | SRCARCH := sparc | |
401 | endif | |
402 | ifeq ($(ARCH),sparc64) | |
403 | SRCARCH := sparc | |
404 | endif | |
405 | ||
406 | # Additional ARCH settings for parisc | |
407 | ifeq ($(ARCH),parisc64) | |
408 | SRCARCH := parisc | |
409 | endif | |
410 | ||
411 | export cross_compiling := | |
412 | ifneq ($(SRCARCH),$(SUBARCH)) | |
413 | cross_compiling := 1 | |
414 | endif | |
415 | ||
416 | KCONFIG_CONFIG ?= .config | |
417 | export KCONFIG_CONFIG | |
418 | ||
419 | # SHELL used by kbuild | |
420 | CONFIG_SHELL := sh | |
421 | ||
422 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) | |
423 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
424 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
425 | ||
426 | ifneq ($(LLVM),) | |
427 | HOSTCC = clang | |
428 | HOSTCXX = clang++ | |
429 | else | |
430 | HOSTCC = gcc | |
431 | HOSTCXX = g++ | |
432 | endif | |
433 | ||
434 | export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ | |
435 | -O2 -fomit-frame-pointer -std=gnu89 | |
436 | export KBUILD_USERLDFLAGS := | |
437 | ||
438 | KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) | |
439 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
440 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
441 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
442 | ||
443 | # Make variables (CC, etc...) | |
444 | CPP = $(CC) -E | |
445 | ifneq ($(LLVM),) | |
446 | CC = clang | |
447 | LD = ld.lld | |
448 | AR = llvm-ar | |
449 | NM = llvm-nm | |
450 | OBJCOPY = llvm-objcopy | |
451 | OBJDUMP = llvm-objdump | |
452 | READELF = llvm-readelf | |
453 | STRIP = llvm-strip | |
454 | else | |
455 | CC = $(CROSS_COMPILE)gcc | |
456 | LD = $(CROSS_COMPILE)ld | |
457 | AR = $(CROSS_COMPILE)ar | |
458 | NM = $(CROSS_COMPILE)nm | |
459 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
460 | OBJDUMP = $(CROSS_COMPILE)objdump | |
461 | READELF = $(CROSS_COMPILE)readelf | |
462 | STRIP = $(CROSS_COMPILE)strip | |
463 | endif | |
464 | PAHOLE = pahole | |
465 | RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids | |
466 | LEX = flex | |
467 | YACC = bison | |
468 | AWK = awk | |
469 | INSTALLKERNEL := installkernel | |
470 | DEPMOD = depmod | |
471 | PERL = perl | |
472 | PYTHON3 = python3 | |
473 | CHECK = sparse | |
474 | BASH = bash | |
475 | KGZIP = gzip | |
476 | KBZIP2 = bzip2 | |
477 | KLZOP = lzop | |
478 | LZMA = lzma | |
479 | LZ4 = lz4c | |
480 | XZ = xz | |
481 | ZSTD = zstd | |
482 | ||
483 | PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) | |
484 | ||
485 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
486 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) | |
487 | NOSTDINC_FLAGS := | |
488 | CFLAGS_MODULE = | |
489 | AFLAGS_MODULE = | |
490 | LDFLAGS_MODULE = | |
491 | CFLAGS_KERNEL = | |
492 | AFLAGS_KERNEL = | |
493 | LDFLAGS_vmlinux = | |
494 | ||
495 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
496 | USERINCLUDE := \ | |
497 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ | |
498 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
499 | -I$(srctree)/include/uapi \ | |
500 | -I$(objtree)/include/generated/uapi \ | |
501 | -include $(srctree)/include/linux/compiler-version.h \ | |
502 | -include $(srctree)/include/linux/kconfig.h | |
503 | ||
504 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
505 | # Needed to be compatible with the O= option | |
506 | LINUXINCLUDE := \ | |
507 | -I$(srctree)/arch/$(SRCARCH)/include \ | |
508 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
509 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ | |
510 | -I$(objtree)/include \ | |
511 | $(USERINCLUDE) | |
512 | ||
513 | # UBUNTU: Include our third party driver stuff too | |
514 | LINUXINCLUDE += -I$(srctree)/ubuntu/include | |
515 | ||
516 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE | |
517 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ | |
518 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ | |
519 | -Werror=implicit-function-declaration -Werror=implicit-int \ | |
520 | -Werror=return-type -Wno-format-security \ | |
521 | -std=gnu89 | |
522 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
523 | KBUILD_AFLAGS_KERNEL := | |
524 | KBUILD_CFLAGS_KERNEL := | |
525 | KBUILD_AFLAGS_MODULE := -DMODULE | |
526 | KBUILD_CFLAGS_MODULE := -DMODULE | |
527 | KBUILD_LDFLAGS_MODULE := | |
528 | KBUILD_LDFLAGS := | |
529 | CLANG_FLAGS := | |
530 | ||
531 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC | |
532 | export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL | |
533 | export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX | |
534 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD | |
535 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE | |
536 | ||
537 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS | |
538 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | |
539 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
540 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
541 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL | |
542 | export PAHOLE_FLAGS | |
543 | ||
544 | # Files to ignore in find ... statements | |
545 | ||
546 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ | |
547 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
548 | -prune -o | |
549 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ | |
550 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
551 | ||
552 | # =========================================================================== | |
553 | # Rules shared between *config targets and build targets | |
554 | ||
555 | # Basic helpers built in scripts/basic/ | |
556 | PHONY += scripts_basic | |
557 | scripts_basic: | |
558 | $(Q)$(MAKE) $(build)=scripts/basic | |
559 | ||
560 | PHONY += outputmakefile | |
561 | ifdef building_out_of_srctree | |
562 | # Before starting out-of-tree build, make sure the source tree is clean. | |
563 | # outputmakefile generates a Makefile in the output directory, if using a | |
564 | # separate output directory. This allows convenient use of make in the | |
565 | # output directory. | |
566 | # At the same time when output Makefile generated, generate .gitignore to | |
567 | # ignore whole output directory | |
568 | ||
569 | quiet_cmd_makefile = GEN Makefile | |
570 | cmd_makefile = { \ | |
571 | echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ | |
572 | echo "include $(srctree)/Makefile"; \ | |
573 | } > Makefile | |
574 | ||
575 | outputmakefile: | |
576 | $(Q)if [ -f $(srctree)/.config -o \ | |
577 | -d $(srctree)/include/config -o \ | |
578 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
579 | echo >&2 "***"; \ | |
580 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
581 | echo >&2 "*** in $(abs_srctree)";\ | |
582 | echo >&2 "***"; \ | |
583 | false; \ | |
584 | fi | |
585 | $(Q)ln -fsn $(srctree) source | |
586 | $(call cmd,makefile) | |
587 | $(Q)test -e .gitignore || \ | |
588 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
589 | endif | |
590 | ||
591 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. | |
592 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
593 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
594 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
595 | CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) | |
596 | ||
597 | ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) | |
598 | include $(srctree)/scripts/Makefile.clang | |
599 | endif | |
600 | ||
601 | # Include this also for config targets because some architectures need | |
602 | # cc-cross-prefix to determine CROSS_COMPILE. | |
603 | ifdef need-compiler | |
604 | include $(srctree)/scripts/Makefile.compiler | |
605 | endif | |
606 | ||
607 | ifdef config-build | |
608 | # =========================================================================== | |
609 | # *config targets only - make sure prerequisites are updated, and descend | |
610 | # in scripts/kconfig to make the *config target | |
611 | ||
612 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
613 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
614 | # used for 'make defconfig' | |
615 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
616 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT | |
617 | ||
618 | config: outputmakefile scripts_basic FORCE | |
619 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
620 | ||
621 | %config: outputmakefile scripts_basic FORCE | |
622 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
623 | ||
624 | else #!config-build | |
625 | # =========================================================================== | |
626 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
627 | # targets and others. In general all targets except *config targets. | |
628 | ||
629 | # If building an external module we do not care about the all: rule | |
630 | # but instead __all depend on modules | |
631 | PHONY += all | |
632 | ifeq ($(KBUILD_EXTMOD),) | |
633 | __all: all | |
634 | else | |
635 | __all: modules | |
636 | endif | |
637 | ||
638 | # Decide whether to build built-in, modular, or both. | |
639 | # Normally, just do built-in. | |
640 | ||
641 | KBUILD_MODULES := | |
642 | KBUILD_BUILTIN := 1 | |
643 | ||
644 | # If we have only "make modules", don't compile built-in objects. | |
645 | ifeq ($(MAKECMDGOALS),modules) | |
646 | KBUILD_BUILTIN := | |
647 | endif | |
648 | ||
649 | # If we have "make <whatever> modules", compile modules | |
650 | # in addition to whatever we do anyway. | |
651 | # Just "make" or "make all" shall build modules as well | |
652 | ||
653 | ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) | |
654 | KBUILD_MODULES := 1 | |
655 | endif | |
656 | ||
657 | ifeq ($(MAKECMDGOALS),) | |
658 | KBUILD_MODULES := 1 | |
659 | endif | |
660 | ||
661 | export KBUILD_MODULES KBUILD_BUILTIN | |
662 | ||
663 | ifdef need-config | |
664 | include include/config/auto.conf | |
665 | endif | |
666 | ||
667 | ifeq ($(KBUILD_EXTMOD),) | |
668 | # Objects we will link into vmlinux / subdirs we need to visit | |
669 | core-y := init/ usr/ arch/$(SRCARCH)/ | |
670 | drivers-y := drivers/ sound/ ubuntu/ | |
671 | drivers-$(CONFIG_SAMPLES) += samples/ | |
672 | drivers-$(CONFIG_NET) += net/ | |
673 | drivers-y += virt/ | |
674 | libs-y := lib/ | |
675 | endif # KBUILD_EXTMOD | |
676 | ||
677 | # The all: target is the default when no target is given on the | |
678 | # command line. | |
679 | # This allow a user to issue only 'make' to build a kernel including modules | |
680 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
681 | all: vmlinux | |
682 | ||
683 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage | |
684 | ifdef CONFIG_CC_IS_GCC | |
685 | CFLAGS_GCOV += -fno-tree-loop-im | |
686 | endif | |
687 | export CFLAGS_GCOV | |
688 | ||
689 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. | |
690 | ifdef CONFIG_FUNCTION_TRACER | |
691 | CC_FLAGS_FTRACE := -pg | |
692 | endif | |
693 | ||
694 | ifdef CONFIG_CC_IS_GCC | |
695 | RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register) | |
696 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register) | |
697 | endif | |
698 | ifdef CONFIG_CC_IS_CLANG | |
699 | RETPOLINE_CFLAGS := -mretpoline-external-thunk | |
700 | RETPOLINE_VDSO_CFLAGS := -mretpoline | |
701 | endif | |
702 | export RETPOLINE_CFLAGS | |
703 | export RETPOLINE_VDSO_CFLAGS | |
704 | ||
705 | include $(srctree)/arch/$(SRCARCH)/Makefile | |
706 | ||
707 | ifdef need-config | |
708 | ifdef may-sync-config | |
709 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if | |
710 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
711 | # because some architectures define CROSS_COMPILE there. | |
712 | include include/config/auto.conf.cmd | |
713 | ||
714 | $(KCONFIG_CONFIG): | |
715 | @echo >&2 '***' | |
716 | @echo >&2 '*** Configuration file "$@" not found!' | |
717 | @echo >&2 '***' | |
718 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
719 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
720 | @echo >&2 '***' | |
721 | @/bin/false | |
722 | ||
723 | # The actual configuration files used during the build are stored in | |
724 | # include/generated/ and include/config/. Update them if .config is newer than | |
725 | # include/config/auto.conf (which mirrors .config). | |
726 | # | |
727 | # This exploits the 'multi-target pattern rule' trick. | |
728 | # The syncconfig should be executed only once to make all the targets. | |
729 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) | |
730 | # | |
731 | # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, | |
732 | # so you cannot notice that Kconfig is waiting for the user input. | |
733 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) | |
734 | $(Q)$(kecho) " SYNC $@" | |
735 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
736 | else # !may-sync-config | |
737 | # External modules and some install targets need include/generated/autoconf.h | |
738 | # and include/config/auto.conf but do not care if they are up-to-date. | |
739 | # Use auto.conf to trigger the test | |
740 | PHONY += include/config/auto.conf | |
741 | ||
742 | include/config/auto.conf: | |
743 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ | |
744 | echo >&2; \ | |
745 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
746 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
747 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
748 | echo >&2 ; \ | |
749 | /bin/false) | |
750 | ||
751 | endif # may-sync-config | |
752 | endif # need-config | |
753 | ||
754 | KBUILD_CFLAGS += -fno-delete-null-pointer-checks | |
755 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) | |
756 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) | |
757 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
758 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
759 | ||
760 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE | |
761 | KBUILD_CFLAGS += -O2 | |
762 | else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 | |
763 | KBUILD_CFLAGS += -O3 | |
764 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
765 | KBUILD_CFLAGS += -Os | |
766 | endif | |
767 | ||
768 | # Tell gcc to never replace conditional load with a non-conditional one | |
769 | ifdef CONFIG_CC_IS_GCC | |
770 | # gcc-10 renamed --param=allow-store-data-races=0 to | |
771 | # -fno-allow-store-data-races. | |
772 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
773 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) | |
774 | endif | |
775 | ||
776 | ifdef CONFIG_READABLE_ASM | |
777 | # Disable optimizations that make assembler listings hard to read. | |
778 | # reorder blocks reorders the control in the function | |
779 | # ipa clone creates specialized cloned functions | |
780 | # partial inlining inlines only parts of functions | |
781 | KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining | |
782 | endif | |
783 | ||
784 | ifneq ($(CONFIG_FRAME_WARN),0) | |
785 | KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) | |
786 | endif | |
787 | ||
788 | stackp-flags-y := -fno-stack-protector | |
789 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector | |
790 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
791 | ||
792 | KBUILD_CFLAGS += $(stackp-flags-y) | |
793 | ||
794 | KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror | |
795 | KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) | |
796 | ||
797 | ifdef CONFIG_CC_IS_CLANG | |
798 | KBUILD_CPPFLAGS += -Qunused-arguments | |
799 | # The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable. | |
800 | KBUILD_CFLAGS += -Wno-gnu | |
801 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
802 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
803 | # See modpost pattern 2 | |
804 | KBUILD_CFLAGS += -mno-global-merge | |
805 | else | |
806 | ||
807 | # Warn about unmarked fall-throughs in switch statement. | |
808 | # Disabled for clang while comment to attribute conversion happens and | |
809 | # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. | |
810 | KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,) | |
811 | # gcc inanely warns about local variables called 'main' | |
812 | KBUILD_CFLAGS += -Wno-main | |
813 | endif | |
814 | ||
815 | # These warnings generated too much noise in a regular build. | |
816 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
817 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) | |
818 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) | |
819 | ||
820 | ifdef CONFIG_FRAME_POINTER | |
821 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
822 | else | |
823 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
824 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
825 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
826 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
827 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
828 | ifndef CONFIG_FUNCTION_TRACER | |
829 | KBUILD_CFLAGS += -fomit-frame-pointer | |
830 | endif | |
831 | endif | |
832 | ||
833 | # Initialize all stack variables with a 0xAA pattern. | |
834 | ifdef CONFIG_INIT_STACK_ALL_PATTERN | |
835 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
836 | endif | |
837 | ||
838 | # Initialize all stack variables with a zero value. | |
839 | ifdef CONFIG_INIT_STACK_ALL_ZERO | |
840 | # Future support for zero initialization is still being debated, see | |
841 | # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being | |
842 | # renamed or dropped. | |
843 | KBUILD_CFLAGS += -ftrivial-auto-var-init=zero | |
844 | KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang | |
845 | endif | |
846 | ||
847 | # While VLAs have been removed, GCC produces unreachable stack probes | |
848 | # for the randomize_kstack_offset feature. Disable it for all compilers. | |
849 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) | |
850 | ||
851 | # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). | |
852 | ifdef CONFIG_ZERO_CALL_USED_REGS | |
853 | KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr | |
854 | endif | |
855 | ||
856 | DEBUG_CFLAGS := | |
857 | ||
858 | ifdef CONFIG_DEBUG_INFO | |
859 | ||
860 | ifdef CONFIG_DEBUG_INFO_SPLIT | |
861 | DEBUG_CFLAGS += -gsplit-dwarf | |
862 | else | |
863 | DEBUG_CFLAGS += -g | |
864 | endif | |
865 | ||
866 | ifndef CONFIG_AS_IS_LLVM | |
867 | KBUILD_AFLAGS += -Wa,-gdwarf-2 | |
868 | endif | |
869 | ||
870 | ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT | |
871 | dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4 | |
872 | dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5 | |
873 | DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y) | |
874 | endif | |
875 | ||
876 | ifdef CONFIG_DEBUG_INFO_REDUCED | |
877 | DEBUG_CFLAGS += -fno-var-tracking | |
878 | ifdef CONFIG_CC_IS_GCC | |
879 | DEBUG_CFLAGS += -femit-struct-debug-baseonly | |
880 | endif | |
881 | endif | |
882 | ||
883 | ifdef CONFIG_DEBUG_INFO_COMPRESSED | |
884 | DEBUG_CFLAGS += -gz=zlib | |
885 | KBUILD_AFLAGS += -gz=zlib | |
886 | KBUILD_LDFLAGS += --compress-debug-sections=zlib | |
887 | endif | |
888 | ||
889 | endif # CONFIG_DEBUG_INFO | |
890 | ||
891 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) | |
892 | export DEBUG_CFLAGS | |
893 | ||
894 | ifdef CONFIG_FUNCTION_TRACER | |
895 | ifdef CONFIG_FTRACE_MCOUNT_USE_CC | |
896 | CC_FLAGS_FTRACE += -mrecord-mcount | |
897 | ifdef CONFIG_HAVE_NOP_MCOUNT | |
898 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
899 | CC_FLAGS_FTRACE += -mnop-mcount | |
900 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
901 | endif | |
902 | endif | |
903 | endif | |
904 | ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL | |
905 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
906 | endif | |
907 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT | |
908 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
909 | BUILD_C_RECORDMCOUNT := y | |
910 | export BUILD_C_RECORDMCOUNT | |
911 | endif | |
912 | endif | |
913 | ifdef CONFIG_HAVE_FENTRY | |
914 | # s390-linux-gnu-gcc did not support -mfentry until gcc-9. | |
915 | ifeq ($(call cc-option-yn, -mfentry),y) | |
916 | CC_FLAGS_FTRACE += -mfentry | |
917 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
918 | endif | |
919 | endif | |
920 | export CC_FLAGS_FTRACE | |
921 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
922 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
923 | endif | |
924 | ||
925 | # We trigger additional mismatches with less inlining | |
926 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
927 | KBUILD_CFLAGS += -fno-inline-functions-called-once | |
928 | endif | |
929 | ||
930 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
931 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections | |
932 | LDFLAGS_vmlinux += --gc-sections | |
933 | endif | |
934 | ||
935 | ifdef CONFIG_SHADOW_CALL_STACK | |
936 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack | |
937 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) | |
938 | export CC_FLAGS_SCS | |
939 | endif | |
940 | ||
941 | ifdef CONFIG_LTO_CLANG | |
942 | ifdef CONFIG_LTO_CLANG_THIN | |
943 | CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit | |
944 | KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache | |
945 | else | |
946 | CC_FLAGS_LTO := -flto | |
947 | endif | |
948 | CC_FLAGS_LTO += -fvisibility=hidden | |
949 | ||
950 | # Limit inlining across translation units to reduce binary size | |
951 | KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 | |
952 | ||
953 | # Check for frame size exceeding threshold during prolog/epilog insertion | |
954 | # when using lld < 13.0.0. | |
955 | ifneq ($(CONFIG_FRAME_WARN),0) | |
956 | ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) | |
957 | KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) | |
958 | endif | |
959 | endif | |
960 | endif | |
961 | ||
962 | ifdef CONFIG_LTO | |
963 | KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) | |
964 | KBUILD_AFLAGS += -fno-lto | |
965 | export CC_FLAGS_LTO | |
966 | endif | |
967 | ||
968 | ifdef CONFIG_CFI_CLANG | |
969 | CC_FLAGS_CFI := -fsanitize=cfi \ | |
970 | -fsanitize-cfi-cross-dso \ | |
971 | -fno-sanitize-cfi-canonical-jump-tables \ | |
972 | -fno-sanitize-trap=cfi \ | |
973 | -fno-sanitize-blacklist | |
974 | ||
975 | ifdef CONFIG_CFI_PERMISSIVE | |
976 | CC_FLAGS_CFI += -fsanitize-recover=cfi | |
977 | endif | |
978 | ||
979 | # If LTO flags are filtered out, we must also filter out CFI. | |
980 | CC_FLAGS_LTO += $(CC_FLAGS_CFI) | |
981 | KBUILD_CFLAGS += $(CC_FLAGS_CFI) | |
982 | export CC_FLAGS_CFI | |
983 | endif | |
984 | ||
985 | ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B | |
986 | KBUILD_CFLAGS += -falign-functions=64 | |
987 | endif | |
988 | ||
989 | # arch Makefile may override CC so keep this after arch Makefile is included | |
990 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | |
991 | ||
992 | # warn about C99 declaration after statement | |
993 | KBUILD_CFLAGS += -Wdeclaration-after-statement | |
994 | ||
995 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel | |
996 | KBUILD_CFLAGS += -Wvla | |
997 | ||
998 | # disable pointer signed / unsigned warnings in gcc 4.0 | |
999 | KBUILD_CFLAGS += -Wno-pointer-sign | |
1000 | ||
1001 | # disable stringop warnings in gcc 8+ | |
1002 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
1003 | ||
1004 | # We'll want to enable this eventually, but it's not going away for 5.7 at least | |
1005 | KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) | |
1006 | KBUILD_CFLAGS += -Wno-array-bounds | |
1007 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) | |
1008 | ||
1009 | # Another good warning that we'll want to enable eventually | |
1010 | KBUILD_CFLAGS += $(call cc-disable-warning, restrict) | |
1011 | ||
1012 | # Enabled with W=2, disabled by default as noisy | |
1013 | ifdef CONFIG_CC_IS_GCC | |
1014 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
1015 | endif | |
1016 | ||
1017 | # disable invalid "can't wrap" optimizations for signed / pointers | |
1018 | KBUILD_CFLAGS += -fno-strict-overflow | |
1019 | ||
1020 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) | |
1021 | KBUILD_CFLAGS += -fno-stack-check | |
1022 | ||
1023 | # conserve stack if available | |
1024 | ifdef CONFIG_CC_IS_GCC | |
1025 | KBUILD_CFLAGS += -fconserve-stack | |
1026 | endif | |
1027 | ||
1028 | # Prohibit date/time macros, which would make the build non-deterministic | |
1029 | KBUILD_CFLAGS += -Werror=date-time | |
1030 | ||
1031 | # enforce correct pointer usage | |
1032 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
1033 | ||
1034 | # Require designated initializers for all marked structures | |
1035 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
1036 | ||
1037 | # change __FILE__ to the relative path from the srctree | |
1038 | KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
1039 | ||
1040 | # include additional Makefiles when needed | |
1041 | include-y := scripts/Makefile.extrawarn | |
1042 | include-$(CONFIG_KASAN) += scripts/Makefile.kasan | |
1043 | include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan | |
1044 | include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan | |
1045 | include-$(CONFIG_KCOV) += scripts/Makefile.kcov | |
1046 | include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins | |
1047 | ||
1048 | include $(addprefix $(srctree)/, $(include-y)) | |
1049 | ||
1050 | # scripts/Makefile.gcc-plugins is intentionally included last. | |
1051 | # Do not add $(call cc-option,...) below this line. When you build the kernel | |
1052 | # from the clean source tree, the GCC plugins do not exist at this point. | |
1053 | ||
1054 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments | |
1055 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
1056 | KBUILD_AFLAGS += $(KAFLAGS) | |
1057 | KBUILD_CFLAGS += $(KCFLAGS) | |
1058 | ||
1059 | KBUILD_LDFLAGS_MODULE += --build-id=sha1 | |
1060 | LDFLAGS_vmlinux += --build-id=sha1 | |
1061 | ||
1062 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
1063 | LDFLAGS_vmlinux += $(call ld-option, -X,) | |
1064 | endif | |
1065 | ||
1066 | ifeq ($(CONFIG_RELR),y) | |
1067 | LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags | |
1068 | endif | |
1069 | ||
1070 | # We never want expected sections to be placed heuristically by the | |
1071 | # linker. All sections should be explicitly named in the linker script. | |
1072 | ifdef CONFIG_LD_ORPHAN_WARN | |
1073 | LDFLAGS_vmlinux += --orphan-handling=warn | |
1074 | endif | |
1075 | ||
1076 | # Align the bit size of userspace programs with the kernel | |
1077 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
1078 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
1079 | ||
1080 | # make the checker run with the right architecture | |
1081 | CHECKFLAGS += --arch=$(ARCH) | |
1082 | ||
1083 | # insure the checker run with the right endianness | |
1084 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
1085 | ||
1086 | # the checker needs the correct machine size | |
1087 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
1088 | ||
1089 | # Default kernel image to build when no specific target is given. | |
1090 | # KBUILD_IMAGE may be overruled on the command line or | |
1091 | # set in the environment | |
1092 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
1093 | # this default value | |
1094 | export KBUILD_IMAGE ?= vmlinux | |
1095 | ||
1096 | # | |
1097 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
1098 | # images. Default is /boot, but you can set it to other values | |
1099 | export INSTALL_PATH ?= /boot | |
1100 | ||
1101 | # | |
1102 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
1103 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
1104 | # an argument if needed. Otherwise it defaults to the kernel install path | |
1105 | # | |
1106 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1107 | ||
1108 | # | |
1109 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1110 | # relocations required by build roots. This is not defined in the | |
1111 | # makefile but the argument can be passed to make if needed. | |
1112 | # | |
1113 | ||
1114 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
1115 | export MODLIB | |
1116 | ||
1117 | PHONY += prepare0 | |
1118 | ||
1119 | export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) | |
1120 | export MODORDER := $(extmod_prefix)modules.order | |
1121 | export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps | |
1122 | ||
1123 | ifeq ($(KBUILD_EXTMOD),) | |
1124 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ | |
1125 | ||
1126 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, \ | |
1127 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
1128 | $(libs-y) $(libs-m))) | |
1129 | ||
1130 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ | |
1131 | $(patsubst %/,%,$(filter %/, $(core-) \ | |
1132 | $(drivers-) $(libs-)))) | |
1133 | ||
1134 | subdir-modorder := $(addsuffix modules.order,$(filter %/, \ | |
1135 | $(core-y) $(core-m) $(libs-y) $(libs-m) \ | |
1136 | $(drivers-y) $(drivers-m))) | |
1137 | ||
1138 | build-dirs := $(vmlinux-dirs) | |
1139 | clean-dirs := $(vmlinux-alldirs) | |
1140 | ||
1141 | # Externally visible symbols (used by link-vmlinux.sh) | |
1142 | KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) | |
1143 | KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) | |
1144 | ifdef CONFIG_MODULES | |
1145 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) | |
1146 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) | |
1147 | else | |
1148 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) | |
1149 | endif | |
1150 | KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) | |
1151 | ||
1152 | export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS | |
1153 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
1154 | # used by scripts/Makefile.package | |
1155 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) | |
1156 | ||
1157 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) | |
1158 | ||
1159 | # Recurse until adjust_autoksyms.sh is satisfied | |
1160 | PHONY += autoksyms_recursive | |
1161 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1162 | # For the kernel to actually contain only the needed exported symbols, | |
1163 | # we have to build modules as well to determine what those symbols are. | |
1164 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1165 | KBUILD_MODULES := 1 | |
1166 | ||
1167 | autoksyms_recursive: descend modules.order | |
1168 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ | |
1169 | "$(MAKE) -f $(srctree)/Makefile vmlinux" | |
1170 | endif | |
1171 | ||
1172 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) | |
1173 | ||
1174 | quiet_cmd_autoksyms_h = GEN $@ | |
1175 | cmd_autoksyms_h = mkdir -p $(dir $@); \ | |
1176 | $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ | |
1177 | ||
1178 | $(autoksyms_h): | |
1179 | $(call cmd,autoksyms_h) | |
1180 | ||
1181 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) | |
1182 | ||
1183 | # Final link of vmlinux with optional arch pass after final link | |
1184 | cmd_link-vmlinux = \ | |
1185 | $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ | |
1186 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) | |
1187 | ||
1188 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE | |
1189 | +$(call if_changed_dep,link-vmlinux) | |
1190 | ||
1191 | targets := vmlinux | |
1192 | ||
1193 | # The actual objects are generated when descending, | |
1194 | # make sure no implicit rule kicks in | |
1195 | $(sort $(vmlinux-deps) $(subdir-modorder)): descend ; | |
1196 | ||
1197 | filechk_kernel.release = \ | |
1198 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1199 | ||
1200 | # Store (new) KERNELRELEASE string in include/config/kernel.release | |
1201 | include/config/kernel.release: FORCE | |
1202 | $(call filechk,kernel.release) | |
1203 | ||
1204 | # Additional helpers built in scripts/ | |
1205 | # Carefully list dependencies so we do not try to build scripts twice | |
1206 | # in parallel | |
1207 | PHONY += scripts | |
1208 | scripts: scripts_basic scripts_dtc | |
1209 | $(Q)$(MAKE) $(build)=$(@) | |
1210 | ||
1211 | # Things we need to do before we recursively start building the kernel | |
1212 | # or the modules are listed in "prepare". | |
1213 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1214 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1215 | # version.h and scripts_basic is processed / created. | |
1216 | ||
1217 | PHONY += prepare archprepare | |
1218 | ||
1219 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ | |
1220 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ | |
1221 | include/generated/autoconf.h remove-stale-files | |
1222 | ||
1223 | prepare0: archprepare | |
1224 | $(Q)$(MAKE) $(build)=scripts/mod | |
1225 | $(Q)$(MAKE) $(build)=. | |
1226 | ||
1227 | # All the preparing.. | |
1228 | prepare: prepare0 | |
1229 | ||
1230 | PHONY += remove-stale-files | |
1231 | remove-stale-files: | |
1232 | $(Q)$(srctree)/scripts/remove-stale-files | |
1233 | ||
1234 | # Support for using generic headers in asm-generic | |
1235 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj | |
1236 | ||
1237 | PHONY += asm-generic uapi-asm-generic | |
1238 | asm-generic: uapi-asm-generic | |
1239 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ | |
1240 | generic=include/asm-generic | |
1241 | uapi-asm-generic: | |
1242 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ | |
1243 | generic=include/uapi/asm-generic | |
1244 | ||
1245 | # Generate some files | |
1246 | # --------------------------------------------------------------------------- | |
1247 | ||
1248 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1249 | # needs to be updated, so this check is forced on all builds | |
1250 | ||
1251 | uts_len := 64 | |
1252 | define filechk_utsrelease.h | |
1253 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1254 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1255 | exit 1; \ | |
1256 | fi; \ | |
1257 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" | |
1258 | endef | |
1259 | ||
1260 | define filechk_version.h | |
1261 | if [ $(SUBLEVEL) -gt 255 ]; then \ | |
1262 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1263 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ | |
1264 | else \ | |
1265 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1266 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ | |
1267 | fi; \ | |
1268 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ | |
1269 | ((c) > 255 ? 255 : (c)))'; \ | |
1270 | echo \#define LINUX_VERSION_MAJOR $(VERSION); \ | |
1271 | echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ | |
1272 | echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) | |
1273 | endef | |
1274 | ||
1275 | $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0) | |
1276 | $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0) | |
1277 | $(version_h): FORCE | |
1278 | $(call filechk,version.h) | |
1279 | ||
1280 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1281 | $(call filechk,utsrelease.h) | |
1282 | ||
1283 | PHONY += headerdep | |
1284 | headerdep: | |
1285 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
1286 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
1287 | ||
1288 | # --------------------------------------------------------------------------- | |
1289 | # Kernel headers | |
1290 | ||
1291 | #Default location for installed headers | |
1292 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1293 | ||
1294 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include | |
1295 | cmd_headers_install = \ | |
1296 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1297 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1298 | usr/include $(INSTALL_HDR_PATH) | |
1299 | ||
1300 | PHONY += headers_install | |
1301 | headers_install: headers | |
1302 | $(call cmd,headers_install) | |
1303 | ||
1304 | PHONY += archheaders archscripts | |
1305 | ||
1306 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj | |
1307 | ||
1308 | PHONY += headers | |
1309 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
1310 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ | |
1311 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
1312 | $(Q)$(MAKE) $(hdr-inst)=include/uapi | |
1313 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1314 | $(Q)$(MAKE) $(hdr-inst)=ubuntu/include dst=include oldheaders= | |
1315 | ||
1316 | # Deprecated. It is no-op now. | |
1317 | PHONY += headers_check | |
1318 | headers_check: | |
1319 | @echo >&2 "=================== WARNING ===================" | |
1320 | @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op," | |
1321 | @echo >&2 "and will be removed after Linux 5.15 release." | |
1322 | @echo >&2 "Please remove headers_check from your scripts." | |
1323 | @echo >&2 "===============================================" | |
1324 | ||
1325 | ifdef CONFIG_HEADERS_INSTALL | |
1326 | prepare: headers | |
1327 | endif | |
1328 | ||
1329 | PHONY += scripts_unifdef | |
1330 | scripts_unifdef: scripts_basic | |
1331 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1332 | ||
1333 | # --------------------------------------------------------------------------- | |
1334 | # Install | |
1335 | ||
1336 | # Many distributions have the custom install script, /sbin/installkernel. | |
1337 | # If DKMS is installed, 'make install' will eventually recuses back | |
1338 | # to the this Makefile to build and install external modules. | |
1339 | # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. | |
1340 | ||
1341 | install: sub_make_done := | |
1342 | ||
1343 | # --------------------------------------------------------------------------- | |
1344 | # Tools | |
1345 | ||
1346 | ifdef CONFIG_STACK_VALIDATION | |
1347 | prepare: tools/objtool | |
1348 | endif | |
1349 | ||
1350 | ifdef CONFIG_BPF | |
1351 | ifdef CONFIG_DEBUG_INFO_BTF | |
1352 | prepare: tools/bpf/resolve_btfids | |
1353 | endif | |
1354 | endif | |
1355 | ||
1356 | PHONY += resolve_btfids_clean | |
1357 | ||
1358 | resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids | |
1359 | ||
1360 | # tools/bpf/resolve_btfids directory might not exist | |
1361 | # in output directory, skip its clean in that case | |
1362 | resolve_btfids_clean: | |
1363 | ifneq ($(wildcard $(resolve_btfids_O)),) | |
1364 | $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean | |
1365 | endif | |
1366 | ||
1367 | # Clear a bunch of variables before executing the submake | |
1368 | ifeq ($(quiet),silent_) | |
1369 | tools_silent=s | |
1370 | endif | |
1371 | ||
1372 | tools/: FORCE | |
1373 | $(Q)mkdir -p $(objtree)/tools | |
1374 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ | |
1375 | ||
1376 | tools/%: FORCE | |
1377 | $(Q)mkdir -p $(objtree)/tools | |
1378 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* | |
1379 | ||
1380 | # --------------------------------------------------------------------------- | |
1381 | # Kernel selftest | |
1382 | ||
1383 | PHONY += kselftest | |
1384 | kselftest: | |
1385 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests | |
1386 | ||
1387 | kselftest-%: FORCE | |
1388 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* | |
1389 | ||
1390 | PHONY += kselftest-merge | |
1391 | kselftest-merge: | |
1392 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1393 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ | |
1394 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
1395 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1396 | ||
1397 | # --------------------------------------------------------------------------- | |
1398 | # Devicetree files | |
1399 | ||
1400 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1401 | dtstree := arch/$(SRCARCH)/boot/dts | |
1402 | endif | |
1403 | ||
1404 | ifneq ($(dtstree),) | |
1405 | ||
1406 | %.dtb: include/config/kernel.release scripts_dtc | |
1407 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1408 | ||
1409 | %.dtbo: include/config/kernel.release scripts_dtc | |
1410 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1411 | ||
1412 | PHONY += dtbs dtbs_install dtbs_check | |
1413 | dtbs: include/config/kernel.release scripts_dtc | |
1414 | $(Q)$(MAKE) $(build)=$(dtstree) | |
1415 | ||
1416 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) | |
1417 | export CHECK_DTBS=y | |
1418 | dtbs: dt_binding_check | |
1419 | endif | |
1420 | ||
1421 | dtbs_check: dtbs | |
1422 | ||
1423 | dtbs_install: | |
1424 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) | |
1425 | ||
1426 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1427 | all: dtbs | |
1428 | endif | |
1429 | ||
1430 | endif | |
1431 | ||
1432 | PHONY += scripts_dtc | |
1433 | scripts_dtc: scripts_basic | |
1434 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1435 | ||
1436 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) | |
1437 | export CHECK_DT_BINDING=y | |
1438 | endif | |
1439 | ||
1440 | PHONY += dt_binding_check | |
1441 | dt_binding_check: scripts_dtc | |
1442 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1443 | ||
1444 | # --------------------------------------------------------------------------- | |
1445 | # Modules | |
1446 | ||
1447 | ifdef CONFIG_MODULES | |
1448 | ||
1449 | # By default, build modules as well | |
1450 | ||
1451 | all: modules | |
1452 | ||
1453 | # When we're building modules with modversions, we need to consider | |
1454 | # the built-in objects during the descend as well, in order to | |
1455 | # make sure the checksums are up to date before we record them. | |
1456 | ifdef CONFIG_MODVERSIONS | |
1457 | KBUILD_BUILTIN := 1 | |
1458 | endif | |
1459 | ||
1460 | # Build modules | |
1461 | # | |
1462 | # A module can be listed more than once in obj-m resulting in | |
1463 | # duplicate lines in modules.order files. Those are removed | |
1464 | # using awk while concatenating to the final file. | |
1465 | ||
1466 | PHONY += modules | |
1467 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare | |
1468 | ||
1469 | cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ | |
1470 | ||
1471 | modules.order: $(subdir-modorder) FORCE | |
1472 | $(call if_changed,modules_order) | |
1473 | ||
1474 | targets += modules.order | |
1475 | ||
1476 | # Target to prepare building external modules | |
1477 | PHONY += modules_prepare | |
1478 | modules_prepare: prepare | |
1479 | $(Q)$(MAKE) $(build)=scripts scripts/module.lds | |
1480 | ||
1481 | export modules_sign_only := | |
1482 | ||
1483 | ifeq ($(CONFIG_MODULE_SIG),y) | |
1484 | PHONY += modules_sign | |
1485 | modules_sign: modules_install | |
1486 | @: | |
1487 | ||
1488 | # modules_sign is a subset of modules_install. | |
1489 | # 'make modules_install modules_sign' is equivalent to 'make modules_install'. | |
1490 | ifeq ($(filter modules_install,$(MAKECMDGOALS)),) | |
1491 | modules_sign_only := y | |
1492 | endif | |
1493 | endif | |
1494 | ||
1495 | modinst_pre := | |
1496 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
1497 | modinst_pre := __modinst_pre | |
1498 | endif | |
1499 | ||
1500 | modules_install: $(modinst_pre) | |
1501 | PHONY += __modinst_pre | |
1502 | __modinst_pre: | |
1503 | @rm -rf $(MODLIB)/kernel | |
1504 | @rm -f $(MODLIB)/source | |
1505 | @mkdir -p $(MODLIB)/kernel | |
1506 | @ln -s $(abspath $(srctree)) $(MODLIB)/source | |
1507 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1508 | rm -f $(MODLIB)/build ; \ | |
1509 | ln -s $(CURDIR) $(MODLIB)/build ; \ | |
1510 | fi | |
1511 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order | |
1512 | @cp -f modules.builtin $(MODLIB)/ | |
1513 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ | |
1514 | ||
1515 | endif # CONFIG_MODULES | |
1516 | ||
1517 | ### | |
1518 | # Cleaning is done on three levels. | |
1519 | # make clean Delete most generated files | |
1520 | # Leave enough to build external modules | |
1521 | # make mrproper Delete the current configuration, and all generated files | |
1522 | # make distclean Remove editor backup files, patch leftover files and the like | |
1523 | ||
1524 | # Directories & files removed with 'make clean' | |
1525 | CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ | |
1526 | modules.builtin modules.builtin.modinfo modules.nsdeps \ | |
1527 | compile_commands.json .thinlto-cache | |
1528 | ||
1529 | # Directories & files removed with 'make mrproper' | |
1530 | MRPROPER_FILES += include/config include/generated \ | |
1531 | arch/$(SRCARCH)/include/generated .tmp_objdiff \ | |
1532 | debian snap tar-install \ | |
1533 | .config .config.old .version \ | |
1534 | Module.symvers \ | |
1535 | certs/signing_key.pem certs/signing_key.x509 \ | |
1536 | certs/x509.genkey \ | |
1537 | vmlinux-gdb.py \ | |
1538 | *.spec | |
1539 | ||
1540 | # clean - Delete most, but leave enough to build external modules | |
1541 | # | |
1542 | clean: rm-files := $(CLEAN_FILES) | |
1543 | ||
1544 | PHONY += archclean vmlinuxclean | |
1545 | ||
1546 | vmlinuxclean: | |
1547 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1548 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) | |
1549 | ||
1550 | clean: archclean vmlinuxclean resolve_btfids_clean | |
1551 | ||
1552 | # mrproper - Delete all generated files, including .config | |
1553 | # | |
1554 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1555 | mrproper-dirs := $(addprefix _mrproper_,scripts) | |
1556 | ||
1557 | PHONY += $(mrproper-dirs) mrproper | |
1558 | $(mrproper-dirs): | |
1559 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1560 | ||
1561 | mrproper: clean $(mrproper-dirs) | |
1562 | $(call cmd,rmfiles) | |
1563 | ||
1564 | # distclean | |
1565 | # | |
1566 | PHONY += distclean | |
1567 | ||
1568 | distclean: mrproper | |
1569 | @find . $(RCS_FIND_IGNORE) \ | |
1570 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1571 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ | |
1572 | -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ | |
1573 | -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ | |
1574 | -type f -print | xargs rm -f | |
1575 | ||
1576 | ||
1577 | # Packaging of the kernel to various formats | |
1578 | # --------------------------------------------------------------------------- | |
1579 | ||
1580 | %src-pkg: FORCE | |
1581 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1582 | %pkg: include/config/kernel.release FORCE | |
1583 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1584 | ||
1585 | # Brief documentation of the typical targets used | |
1586 | # --------------------------------------------------------------------------- | |
1587 | ||
1588 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1589 | boards := $(sort $(notdir $(boards))) | |
1590 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1591 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1592 | ||
1593 | PHONY += help | |
1594 | help: | |
1595 | @echo 'Cleaning targets:' | |
1596 | @echo ' clean - Remove most generated files but keep the config and' | |
1597 | @echo ' enough build support to build external modules' | |
1598 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1599 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1600 | @echo '' | |
1601 | @echo 'Configuration targets:' | |
1602 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1603 | @echo '' | |
1604 | @echo 'Other generic targets:' | |
1605 | @echo ' all - Build all targets marked with [*]' | |
1606 | @echo '* vmlinux - Build the bare kernel' | |
1607 | @echo '* modules - Build all modules' | |
1608 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1609 | @echo ' dir/ - Build all files in dir and below' | |
1610 | @echo ' dir/file.[ois] - Build specified target only' | |
1611 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1612 | @echo ' (requires compiler support for LLVM assembly generation)' | |
1613 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1614 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1615 | @echo ' dir/file.ko - Build module including final link' | |
1616 | @echo ' modules_prepare - Set up for building external modules' | |
1617 | @echo ' tags/TAGS - Generate tags file for editors' | |
1618 | @echo ' cscope - Generate cscope index' | |
1619 | @echo ' gtags - Generate GNU GLOBAL index' | |
1620 | @echo ' kernelrelease - Output the release version string (use with make -s)' | |
1621 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1622 | @echo ' image_name - Output the image name (use with make -s)' | |
1623 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1624 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1625 | echo '' | |
1626 | @echo 'Static analysers:' | |
1627 | @echo ' checkstack - Generate a list of stack hogs' | |
1628 | @echo ' versioncheck - Sanity check on version.h usage' | |
1629 | @echo ' includecheck - Check for duplicate included header files' | |
1630 | @echo ' export_report - List the usages of all exported symbols' | |
1631 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1632 | @echo ' coccicheck - Check with Coccinelle' | |
1633 | @echo ' clang-analyzer - Check with clang static analyzer' | |
1634 | @echo ' clang-tidy - Check with clang-tidy' | |
1635 | @echo '' | |
1636 | @echo 'Tools:' | |
1637 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1638 | @echo '' | |
1639 | @echo 'Kernel selftest:' | |
1640 | @echo ' kselftest - Build and run kernel selftest' | |
1641 | @echo ' Build, install, and boot kernel before' | |
1642 | @echo ' running kselftest on it' | |
1643 | @echo ' Run as root for full coverage' | |
1644 | @echo ' kselftest-all - Build kernel selftest' | |
1645 | @echo ' kselftest-install - Build and install kernel selftest' | |
1646 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1647 | @echo ' kselftest-merge - Merge all the config dependencies of' | |
1648 | @echo ' kselftest to existing .config.' | |
1649 | @echo '' | |
1650 | @$(if $(dtstree), \ | |
1651 | echo 'Devicetree:'; \ | |
1652 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1653 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1654 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1655 | echo ' dtbs_check - Validate device tree source files';\ | |
1656 | echo '') | |
1657 | ||
1658 | @echo 'Userspace tools targets:' | |
1659 | @echo ' use "make tools/help"' | |
1660 | @echo ' or "cd tools; make help"' | |
1661 | @echo '' | |
1662 | @echo 'Kernel packaging:' | |
1663 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help | |
1664 | @echo '' | |
1665 | @echo 'Documentation targets:' | |
1666 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp | |
1667 | @echo '' | |
1668 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1669 | @$(if $(archhelp),$(archhelp),\ | |
1670 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1671 | @echo '' | |
1672 | @$(if $(boards), \ | |
1673 | $(foreach b, $(boards), \ | |
1674 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1675 | echo '') | |
1676 | @$(if $(board-dirs), \ | |
1677 | $(foreach b, $(board-dirs), \ | |
1678 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1679 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1680 | echo '') | |
1681 | ||
1682 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1683 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' | |
1684 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1685 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' | |
1686 | @echo ' (sparse by default)' | |
1687 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1688 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1689 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' | |
1690 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1691 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1692 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1693 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1694 | @echo '' | |
1695 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1696 | @echo 'For further info see the ./README file' | |
1697 | ||
1698 | ||
1699 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1700 | ||
1701 | help-boards: $(help-board-dirs) | |
1702 | ||
1703 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) | |
1704 | ||
1705 | $(help-board-dirs): help-%: | |
1706 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1707 | @$(if $(boards-per-dir), \ | |
1708 | $(foreach b, $(boards-per-dir), \ | |
1709 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1710 | echo '') | |
1711 | ||
1712 | ||
1713 | # Documentation targets | |
1714 | # --------------------------------------------------------------------------- | |
1715 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ | |
1716 | linkcheckdocs dochelp refcheckdocs | |
1717 | PHONY += $(DOC_TARGETS) | |
1718 | $(DOC_TARGETS): | |
1719 | $(Q)$(MAKE) $(build)=Documentation $@ | |
1720 | ||
1721 | # Misc | |
1722 | # --------------------------------------------------------------------------- | |
1723 | ||
1724 | PHONY += scripts_gdb | |
1725 | scripts_gdb: prepare0 | |
1726 | $(Q)$(MAKE) $(build)=scripts/gdb | |
1727 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1728 | ||
1729 | ifdef CONFIG_GDB_SCRIPTS | |
1730 | all: scripts_gdb | |
1731 | endif | |
1732 | ||
1733 | else # KBUILD_EXTMOD | |
1734 | ||
1735 | ### | |
1736 | # External module support. | |
1737 | # When building external modules the kernel used as basis is considered | |
1738 | # read-only, and no consistency checks are made and the make | |
1739 | # system is not used on the basis kernel. If updates are required | |
1740 | # in the basis kernel ordinary make commands (without M=...) must be used. | |
1741 | ||
1742 | # We are always building only modules. | |
1743 | KBUILD_BUILTIN := | |
1744 | KBUILD_MODULES := 1 | |
1745 | ||
1746 | build-dirs := $(KBUILD_EXTMOD) | |
1747 | $(MODORDER): descend | |
1748 | @: | |
1749 | ||
1750 | compile_commands.json: $(extmod_prefix)compile_commands.json | |
1751 | PHONY += compile_commands.json | |
1752 | ||
1753 | clean-dirs := $(KBUILD_EXTMOD) | |
1754 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ | |
1755 | $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache | |
1756 | ||
1757 | PHONY += prepare | |
1758 | # now expand this into a simple variable to reduce the cost of shell evaluations | |
1759 | prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) | |
1760 | prepare: | |
1761 | @if [ "$(CC_VERSION_TEXT)" != $(CONFIG_CC_VERSION_TEXT) ]; then \ | |
1762 | echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ | |
1763 | echo >&2 " The kernel was built by: "$(CONFIG_CC_VERSION_TEXT); \ | |
1764 | echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ | |
1765 | fi | |
1766 | ||
1767 | PHONY += help | |
1768 | help: | |
1769 | @echo ' Building external modules.' | |
1770 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1771 | @echo '' | |
1772 | @echo ' modules - default target, build the module(s)' | |
1773 | @echo ' modules_install - install the module' | |
1774 | @echo ' clean - remove generated files in module directory only' | |
1775 | @echo '' | |
1776 | ||
1777 | # no-op for external module builds | |
1778 | PHONY += modules_prepare | |
1779 | ||
1780 | endif # KBUILD_EXTMOD | |
1781 | ||
1782 | # --------------------------------------------------------------------------- | |
1783 | # Modules | |
1784 | ||
1785 | PHONY += modules modules_install | |
1786 | ||
1787 | ifdef CONFIG_MODULES | |
1788 | ||
1789 | modules: modules_check | |
1790 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1791 | ||
1792 | PHONY += modules_check | |
1793 | modules_check: $(MODORDER) | |
1794 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< | |
1795 | ||
1796 | quiet_cmd_depmod = DEPMOD $(MODLIB) | |
1797 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ | |
1798 | $(KERNELRELEASE) | |
1799 | ||
1800 | modules_install: | |
1801 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1802 | $(call cmd,depmod) | |
1803 | ||
1804 | else # CONFIG_MODULES | |
1805 | ||
1806 | # Modules not configured | |
1807 | # --------------------------------------------------------------------------- | |
1808 | ||
1809 | modules modules_install: | |
1810 | @echo >&2 '***' | |
1811 | @echo >&2 '*** The present kernel configuration has modules disabled.' | |
1812 | @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' | |
1813 | @echo >&2 '*** to enable CONFIG_MODULES.' | |
1814 | @echo >&2 '***' | |
1815 | @exit 1 | |
1816 | ||
1817 | endif # CONFIG_MODULES | |
1818 | ||
1819 | # Single targets | |
1820 | # --------------------------------------------------------------------------- | |
1821 | # To build individual files in subdirectories, you can do like this: | |
1822 | # | |
1823 | # make foo/bar/baz.s | |
1824 | # | |
1825 | # The supported suffixes for single-target are listed in 'single-targets' | |
1826 | # | |
1827 | # To build only under specific subdirectories, you can do like this: | |
1828 | # | |
1829 | # make foo/bar/baz/ | |
1830 | ||
1831 | ifdef single-build | |
1832 | ||
1833 | # .ko is special because modpost is needed | |
1834 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
1835 | single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) | |
1836 | ||
1837 | $(single-ko): single_modpost | |
1838 | @: | |
1839 | $(single-no-ko): descend | |
1840 | @: | |
1841 | ||
1842 | ifeq ($(KBUILD_EXTMOD),) | |
1843 | # For the single build of in-tree modules, use a temporary file to avoid | |
1844 | # the situation of modules_install installing an invalid modules.order. | |
1845 | MODORDER := .modules.tmp | |
1846 | endif | |
1847 | ||
1848 | PHONY += single_modpost | |
1849 | single_modpost: $(single-no-ko) modules_prepare | |
1850 | $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER) | |
1851 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1852 | ||
1853 | KBUILD_MODULES := 1 | |
1854 | ||
1855 | export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko)) | |
1856 | ||
1857 | # trim unrelated directories | |
1858 | build-dirs := $(foreach d, $(build-dirs), \ | |
1859 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
1860 | ||
1861 | endif | |
1862 | ||
1863 | ifndef CONFIG_MODULES | |
1864 | KBUILD_MODULES := | |
1865 | endif | |
1866 | ||
1867 | # Handle descending into subdirectories listed in $(build-dirs) | |
1868 | # Preset locale variables to speed up the build process. Limit locale | |
1869 | # tweaks to this spot to avoid wrong language settings when running | |
1870 | # make menuconfig etc. | |
1871 | # Error messages still appears in the original language | |
1872 | PHONY += descend $(build-dirs) | |
1873 | descend: $(build-dirs) | |
1874 | $(build-dirs): prepare | |
1875 | $(Q)$(MAKE) $(build)=$@ \ | |
1876 | single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ | |
1877 | need-builtin=1 need-modorder=1 | |
1878 | ||
1879 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) | |
1880 | PHONY += $(clean-dirs) clean | |
1881 | $(clean-dirs): | |
1882 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1883 | ||
1884 | clean: $(clean-dirs) | |
1885 | $(call cmd,rmfiles) | |
1886 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1887 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1888 | -o -name '*.ko.*' \ | |
1889 | -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
1890 | -o -name '*.dwo' -o -name '*.lst' \ | |
1891 | -o -name '*.su' -o -name '*.mod' \ | |
1892 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1893 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ | |
1894 | -o -name '*.asn1.[ch]' \ | |
1895 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1896 | -o -name '.tmp_*.o.*' \ | |
1897 | -o -name '*.c.[012]*.*' \ | |
1898 | -o -name '*.ll' \ | |
1899 | -o -name '*.gcno' \ | |
1900 | -o -name '*.*.symversions' \) -type f -print | xargs rm -f | |
1901 | ||
1902 | # Generate tags for editors | |
1903 | # --------------------------------------------------------------------------- | |
1904 | quiet_cmd_tags = GEN $@ | |
1905 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ | |
1906 | ||
1907 | tags TAGS cscope gtags: FORCE | |
1908 | $(call cmd,tags) | |
1909 | ||
1910 | # Script to generate missing namespace dependencies | |
1911 | # --------------------------------------------------------------------------- | |
1912 | ||
1913 | PHONY += nsdeps | |
1914 | nsdeps: export KBUILD_NSDEPS=1 | |
1915 | nsdeps: modules | |
1916 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps | |
1917 | ||
1918 | # Clang Tooling | |
1919 | # --------------------------------------------------------------------------- | |
1920 | ||
1921 | quiet_cmd_gen_compile_commands = GEN $@ | |
1922 | cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) | |
1923 | ||
1924 | $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ | |
1925 | $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ | |
1926 | $(if $(CONFIG_MODULES), $(MODORDER)) FORCE | |
1927 | $(call if_changed,gen_compile_commands) | |
1928 | ||
1929 | targets += $(extmod_prefix)compile_commands.json | |
1930 | ||
1931 | PHONY += clang-tidy clang-analyzer | |
1932 | ||
1933 | ifdef CONFIG_CC_IS_CLANG | |
1934 | quiet_cmd_clang_tools = CHECK $< | |
1935 | cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< | |
1936 | ||
1937 | clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json | |
1938 | $(call cmd,clang_tools) | |
1939 | else | |
1940 | clang-tidy clang-analyzer: | |
1941 | @echo "$@ requires CC=clang" >&2 | |
1942 | @false | |
1943 | endif | |
1944 | ||
1945 | # Scripts to check various things for consistency | |
1946 | # --------------------------------------------------------------------------- | |
1947 | ||
1948 | PHONY += includecheck versioncheck coccicheck export_report | |
1949 | ||
1950 | includecheck: | |
1951 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1952 | -name '*.[hcS]' -type f -print | sort \ | |
1953 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1954 | ||
1955 | versioncheck: | |
1956 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1957 | -name '*.[hcS]' -type f -print | sort \ | |
1958 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
1959 | ||
1960 | coccicheck: | |
1961 | $(Q)$(BASH) $(srctree)/scripts/$@ | |
1962 | ||
1963 | export_report: | |
1964 | $(PERL) $(srctree)/scripts/export_report.pl | |
1965 | ||
1966 | PHONY += checkstack kernelrelease kernelversion image_name | |
1967 | ||
1968 | # UML needs a little special treatment here. It wants to use the host | |
1969 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1970 | # else wants $(ARCH), including people doing cross-builds, which means | |
1971 | # that $(SUBARCH) doesn't work here. | |
1972 | ifeq ($(ARCH), um) | |
1973 | CHECKSTACK_ARCH := $(SUBARCH) | |
1974 | else | |
1975 | CHECKSTACK_ARCH := $(ARCH) | |
1976 | endif | |
1977 | checkstack: | |
1978 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1979 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
1980 | ||
1981 | kernelrelease: | |
1982 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1983 | ||
1984 | kernelversion: | |
1985 | @echo $(KERNELVERSION) | |
1986 | ||
1987 | image_name: | |
1988 | @echo $(KBUILD_IMAGE) | |
1989 | ||
1990 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1991 | cmd_rmfiles = rm -rf $(rm-files) | |
1992 | ||
1993 | # read saved command lines for existing targets | |
1994 | existing-targets := $(wildcard $(sort $(targets))) | |
1995 | ||
1996 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
1997 | ||
1998 | endif # config-build | |
1999 | endif # mixed-build | |
2000 | endif # need-sub-make | |
2001 | ||
2002 | PHONY += FORCE | |
2003 | FORCE: | |
2004 | ||
2005 | # Declare the contents of the PHONY variable as phony. We keep that | |
2006 | # information in a variable so we can use it in if_changed and friends. | |
2007 | .PHONY: $(PHONY) |