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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
568035b0 | 2 | VERSION = 6 |
ac9a7868 | 3 | PATCHLEVEL = 4 |
55922c9d | 4 | SUBLEVEL = 0 |
f1fcbaa1 | 5 | EXTRAVERSION = -rc2 |
568035b0 | 6 | NAME = Hurr durr I'ma ninja sloth |
1da177e4 LT |
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 | ||
87d599fc MY |
14 | ifeq ($(filter undefine,$(.FEATURES)),) |
15 | $(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION)) | |
16 | endif | |
17 | ||
121c2a13 MY |
18 | $(if $(filter __%, $(MAKECMDGOALS)), \ |
19 | $(error targets prefixed with '__' are only for internal use)) | |
20 | ||
ba634ece | 21 | # That's our default target when none is given on the command line |
121c2a13 MY |
22 | PHONY := __all |
23 | __all: | |
ba634ece | 24 | |
1da177e4 LT |
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 | |
f49821ee | 31 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
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 | ||
5fa94ceb MY |
41 | this-makefile := $(lastword $(MAKEFILE_LIST)) |
42 | export abs_srctree := $(realpath $(dir $(this-makefile))) | |
43 | export abs_objtree := $(CURDIR) | |
44 | ||
221cc2d2 | 45 | ifneq ($(sub_make_done),1) |
3812b8c5 MY |
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 | ||
066b7ed9 MM |
60 | # Beautify output |
61 | # --------------------------------------------------------------------------- | |
62 | # | |
8962b6b4 MY |
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. | |
066b7ed9 | 66 | # |
8962b6b4 MY |
67 | # e.g.) |
68 | # quiet_cmd_depmod = DEPMOD $(MODLIB) | |
69 | # cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE) | |
066b7ed9 MM |
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 | # | |
8962b6b4 | 74 | # $(Q)$(MAKE) $(build)=scripts/basic |
066b7ed9 | 75 | # |
6ae4b986 MY |
76 | # If KBUILD_VERBOSE contains 1, the whole command is echoed. |
77 | # If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. | |
066b7ed9 | 78 | # |
1da177e4 LT |
79 | # To put more focus on warnings, be less verbose as default |
80 | # Use 'make V=1' to see the full commands | |
81 | ||
b8b0618c CR |
82 | ifeq ("$(origin V)", "command line") |
83 | KBUILD_VERBOSE = $(V) | |
1da177e4 | 84 | endif |
1da177e4 | 85 | |
6ae4b986 MY |
86 | quiet = quiet_ |
87 | Q = @ | |
88 | ||
89 | ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) | |
066b7ed9 MM |
90 | quiet = |
91 | Q = | |
066b7ed9 MM |
92 | endif |
93 | ||
94 | # If the user is running make -s (silent mode), suppress echoing of | |
95 | # commands | |
4bf73588 | 96 | # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. |
066b7ed9 | 97 | |
4bf73588 | 98 | ifeq ($(filter 3.%,$(MAKE_VERSION)),) |
fc5d57a9 | 99 | short-opts := $(firstword -$(MAKEFLAGS)) |
4bf73588 | 100 | else |
fc5d57a9 | 101 | short-opts := $(filter-out --%,$(MAKEFLAGS)) |
4bf73588 DG |
102 | endif |
103 | ||
fc5d57a9 | 104 | ifneq ($(findstring s,$(short-opts)),) |
4bf73588 | 105 | quiet=silent_ |
83d98d73 | 106 | override KBUILD_VERBOSE := |
066b7ed9 | 107 | endif |
066b7ed9 MM |
108 | |
109 | export quiet Q KBUILD_VERBOSE | |
110 | ||
bcf637f5 MY |
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 = $(C) | |
123 | endif | |
124 | ifndef KBUILD_CHECKSRC | |
125 | KBUILD_CHECKSRC = 0 | |
126 | endif | |
127 | ||
128 | export KBUILD_CHECKSRC | |
129 | ||
2f7ab126 MO |
130 | # Enable "clippy" (a linter) as part of the Rust compilation. |
131 | # | |
132 | # Use 'make CLIPPY=1' to enable it. | |
133 | ifeq ("$(origin CLIPPY)", "command line") | |
134 | KBUILD_CLIPPY := $(CLIPPY) | |
135 | endif | |
136 | ||
137 | export KBUILD_CLIPPY | |
138 | ||
bcf637f5 MY |
139 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the |
140 | # directory of external module to build. Setting M= takes precedence. | |
141 | ifeq ("$(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 | ||
9a68fd7f MY |
148 | $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ |
149 | $(error module directory path cannot contain '$x'))) | |
150 | ||
74ee585b MY |
151 | # Remove trailing slashes |
152 | ifneq ($(filter %/, $(KBUILD_EXTMOD)),) | |
153 | KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) | |
154 | endif | |
155 | ||
bcf637f5 MY |
156 | export KBUILD_EXTMOD |
157 | ||
25b146c5 MY |
158 | # Kbuild will save output files in the current working directory. |
159 | # This does not need to match to the root of the kernel source tree. | |
160 | # | |
161 | # For example, you can do this: | |
162 | # | |
163 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
164 | # | |
165 | # If you want to save output files in a different location, there are | |
166 | # two syntaxes to specify it. | |
167 | # | |
1da177e4 LT |
168 | # 1) O= |
169 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 170 | # |
1da177e4 | 171 | # 2) Set KBUILD_OUTPUT |
25b146c5 MY |
172 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
173 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
1da177e4 LT |
174 | # |
175 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
176 | # variable. | |
177 | ||
25b146c5 | 178 | # Do we want to change the working directory? |
b8b0618c CR |
179 | ifeq ("$(origin O)", "command line") |
180 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
181 | endif |
182 | ||
25b146c5 MY |
183 | ifneq ($(KBUILD_OUTPUT),) |
184 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
185 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
186 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
187 | $(if $(abs_objtree),, \ | |
188 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
189 | ||
190 | # $(realpath ...) resolves symlinks | |
191 | abs_objtree := $(realpath $(abs_objtree)) | |
25b146c5 MY |
192 | endif # ifneq ($(KBUILD_OUTPUT),) |
193 | ||
194 | ifeq ($(abs_objtree),$(CURDIR)) | |
195 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
196 | MAKEFLAGS += --no-print-directory | |
197 | else | |
198 | need-sub-make := 1 | |
51193b76 RJ |
199 | endif |
200 | ||
25b146c5 MY |
201 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
202 | $(error source directory cannot contain spaces or colons) | |
203 | endif | |
1da177e4 | 204 | |
688931a5 MY |
205 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
206 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
207 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
208 | need-sub-make := 1 | |
209 | # Cancel implicit rules for this Makefile. | |
93fdddfe | 210 | $(this-makefile): ; |
688931a5 MY |
211 | endif |
212 | ||
221cc2d2 MY |
213 | export sub_make_done := 1 |
214 | ||
688931a5 MY |
215 | ifeq ($(need-sub-make),1) |
216 | ||
121c2a13 | 217 | PHONY += $(MAKECMDGOALS) __sub-make |
0b35786d | 218 | |
121c2a13 | 219 | $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make |
16f89098 | 220 | @: |
0b35786d | 221 | |
c4e6fff1 | 222 | # Invoke a second make in the output directory, passing relevant variables |
121c2a13 | 223 | __sub-make: |
25b146c5 | 224 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
1da177e4 | 225 | |
688931a5 | 226 | endif # need-sub-make |
221cc2d2 | 227 | endif # sub_make_done |
688931a5 | 228 | |
1da177e4 | 229 | # We process the rest of the Makefile if this is the final invocation of make |
688931a5 | 230 | ifeq ($(need-sub-make),) |
1da177e4 | 231 | |
7ff52571 MY |
232 | # Do not print "Entering directory ...", |
233 | # but we want to display it when entering to the output directory | |
234 | # so that IDEs/editors are able to understand relative filenames. | |
235 | MAKEFLAGS += --no-print-directory | |
236 | ||
25b146c5 | 237 | ifeq ($(abs_srctree),$(abs_objtree)) |
9da0763b MM |
238 | # building in the source tree |
239 | srctree := . | |
051f278e | 240 | building_out_of_srctree := |
9da0763b | 241 | else |
25b146c5 | 242 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
9da0763b MM |
243 | # building in a subdirectory of the source tree |
244 | srctree := .. | |
245 | else | |
25b146c5 | 246 | srctree := $(abs_srctree) |
9da0763b | 247 | endif |
051f278e | 248 | building_out_of_srctree := 1 |
9da0763b | 249 | endif |
2c1f4f12 | 250 | |
95fd3f87 MY |
251 | ifneq ($(KBUILD_ABS_SRCTREE),) |
252 | srctree := $(abs_srctree) | |
253 | endif | |
2c1f4f12 | 254 | |
7e1c0477 | 255 | objtree := . |
6b12de69 | 256 | VPATH := $(srctree) |
1da177e4 | 257 | |
051f278e | 258 | export building_out_of_srctree srctree objtree VPATH |
1da177e4 | 259 | |
2c1f4f12 MY |
260 | # To make sure we do not include .config for any of the *config targets |
261 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
262 | # It is allowed to specify more targets when calling make, including | |
263 | # mixing *config targets and build targets. | |
264 | # For example 'make oldconfig all'. | |
265 | # Detect when mixed targets is specified, and make a second invocation | |
266 | # of make so .config is not included in this case either (for *config). | |
267 | ||
268 | version_h := include/generated/uapi/linux/version.h | |
2c1f4f12 | 269 | |
22340a06 MY |
270 | clean-targets := %clean mrproper cleandocs |
271 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 | 272 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
59b2bd05 | 273 | $(version_h) headers headers_% archheaders archscripts \ |
4623980d | 274 | %asm-generic kernelversion %src-pkg dt_binding_check \ |
05e96e96 | 275 | outputmakefile rustavailable rustfmt rustfmtcheck |
805b2e1d MY |
276 | # Installation targets should not require compiler. Unfortunately, vdso_install |
277 | # is an exception where build artifacts may be updated. This must be fixed. | |
278 | no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ | |
279 | headers_install modules_install kernelrelease image_name | |
993bdde9 MY |
280 | no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ |
281 | image_name | |
aa4847db | 282 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ |
2c1f4f12 | 283 | |
2042b548 MY |
284 | config-build := |
285 | mixed-build := | |
286 | need-config := 1 | |
805b2e1d | 287 | need-compiler := 1 |
2042b548 | 288 | may-sync-config := 1 |
394053f4 | 289 | single-build := |
2c1f4f12 MY |
290 | |
291 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
292 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 293 | need-config := |
2c1f4f12 MY |
294 | endif |
295 | endif | |
296 | ||
805b2e1d MY |
297 | ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) |
298 | ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) | |
299 | need-compiler := | |
300 | endif | |
301 | endif | |
302 | ||
d7942413 MY |
303 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
304 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 305 | may-sync-config := |
d7942413 MY |
306 | endif |
307 | endif | |
308 | ||
309 | ifneq ($(KBUILD_EXTMOD),) | |
2042b548 | 310 | may-sync-config := |
d7942413 MY |
311 | endif |
312 | ||
2c1f4f12 | 313 | ifeq ($(KBUILD_EXTMOD),) |
efbf9726 | 314 | ifneq ($(filter %config,$(MAKECMDGOALS)),) |
2042b548 | 315 | config-build := 1 |
2c1f4f12 | 316 | ifneq ($(words $(MAKECMDGOALS)),1) |
2042b548 | 317 | mixed-build := 1 |
2c1f4f12 MY |
318 | endif |
319 | endif | |
320 | endif | |
22340a06 | 321 | |
394053f4 MY |
322 | # We cannot build single targets and the others at the same time |
323 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
324 | single-build := 1 | |
325 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
326 | mixed-build := 1 | |
327 | endif | |
328 | endif | |
329 | ||
22340a06 MY |
330 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
331 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
332 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
2042b548 | 333 | mixed-build := 1 |
22340a06 MY |
334 | endif |
335 | endif | |
336 | ||
2c1f4f12 MY |
337 | # install and modules_install need also be processed one by one |
338 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
339 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
2042b548 | 340 | mixed-build := 1 |
2c1f4f12 MY |
341 | endif |
342 | endif | |
343 | ||
2042b548 | 344 | ifdef mixed-build |
2c1f4f12 MY |
345 | # =========================================================================== |
346 | # We're called with mixed targets (*config and build targets). | |
347 | # Handle them one by one. | |
348 | ||
349 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
350 | ||
121c2a13 | 351 | $(MAKECMDGOALS): __build_one_by_one |
2c1f4f12 MY |
352 | @: |
353 | ||
354 | __build_one_by_one: | |
355 | $(Q)set -e; \ | |
356 | for i in $(MAKECMDGOALS); do \ | |
357 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
358 | done | |
359 | ||
2042b548 | 360 | else # !mixed-build |
2c1f4f12 | 361 | |
3204a7fb | 362 | include $(srctree)/scripts/Kbuild.include |
2c1f4f12 MY |
363 | |
364 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
6768fa4b | 365 | KERNELRELEASE = $(call read-file, include/config/kernel.release) |
2c1f4f12 MY |
366 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
367 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
368 | ||
3204a7fb | 369 | include $(srctree)/scripts/subarch.include |
1da177e4 LT |
370 | |
371 | # Cross compiling and selecting different set of gcc/bin-utils | |
372 | # --------------------------------------------------------------------------- | |
373 | # | |
374 | # When performing cross compilation for other architectures ARCH shall be set | |
375 | # to the target architecture. (See arch/* for the possibilities). | |
376 | # ARCH can be set during invocation of make: | |
377 | # make ARCH=ia64 | |
378 | # Another way is to have ARCH set in the environment. | |
379 | # The default ARCH is the host where make is executed. | |
380 | ||
381 | # CROSS_COMPILE specify the prefix used for all executables used | |
382 | # during compilation. Only gcc and related bin-utils executables | |
383 | # are prefixed with $(CROSS_COMPILE). | |
384 | # CROSS_COMPILE can be set on the command line | |
385 | # make CROSS_COMPILE=ia64-linux- | |
386 | # Alternatively CROSS_COMPILE can be set in the environment. | |
387 | # Default value for CROSS_COMPILE is not to prefix executables | |
388 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 389 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
390 | |
391 | # Architecture as present in compile.h | |
6752ed90 TG |
392 | UTS_MACHINE := $(ARCH) |
393 | SRCARCH := $(ARCH) | |
1da177e4 | 394 | |
d746d647 SR |
395 | # Additional ARCH settings for x86 |
396 | ifeq ($(ARCH),i386) | |
397 | SRCARCH := x86 | |
398 | endif | |
399 | ifeq ($(ARCH),x86_64) | |
400 | SRCARCH := x86 | |
401 | endif | |
74b469f2 | 402 | |
5e538790 | 403 | # Additional ARCH settings for sparc |
e69f58c0 NK |
404 | ifeq ($(ARCH),sparc32) |
405 | SRCARCH := sparc | |
406 | endif | |
a439fe51 | 407 | ifeq ($(ARCH),sparc64) |
5e538790 | 408 | SRCARCH := sparc |
a439fe51 | 409 | endif |
2fb9b1bd | 410 | |
5f6e0fe0 MY |
411 | # Additional ARCH settings for parisc |
412 | ifeq ($(ARCH),parisc64) | |
413 | SRCARCH := parisc | |
414 | endif | |
415 | ||
f02aa48d MY |
416 | export cross_compiling := |
417 | ifneq ($(SRCARCH),$(SUBARCH)) | |
418 | cross_compiling := 1 | |
419 | endif | |
420 | ||
14cdd3c4 | 421 | KCONFIG_CONFIG ?= .config |
41263fc6 | 422 | export KCONFIG_CONFIG |
14cdd3c4 | 423 | |
1da177e4 | 424 | # SHELL used by kbuild |
858805b3 | 425 | CONFIG_SHELL := sh |
1da177e4 | 426 | |
6d79a7b4 MY |
427 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
428 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
429 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 430 | |
a0d1c951 | 431 | ifneq ($(LLVM),) |
e9c28192 NC |
432 | ifneq ($(filter %/,$(LLVM)),) |
433 | LLVM_PREFIX := $(LLVM) | |
434 | else ifneq ($(filter -%,$(LLVM)),) | |
435 | LLVM_SUFFIX := $(LLVM) | |
436 | endif | |
437 | ||
438 | HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) | |
439 | HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) | |
a0d1c951 MY |
440 | else |
441 | HOSTCC = gcc | |
442 | HOSTCXX = g++ | |
443 | endif | |
2f7ab126 | 444 | HOSTRUSTC = rustc |
d5ea4fec | 445 | HOSTPKG_CONFIG = pkg-config |
7f3a59db | 446 | |
f67695c9 | 447 | KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ |
b8321ed4 LT |
448 | -O2 -fomit-frame-pointer -std=gnu11 \ |
449 | -Wdeclaration-after-statement | |
f67695c9 EB |
450 | KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) |
451 | KBUILD_USERLDFLAGS := $(USERLDFLAGS) | |
7f3a59db | 452 | |
2f7ab126 MO |
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 | -Wclippy::dbg_macro | |
468 | ||
f67695c9 | 469 | KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) |
735aab1e | 470 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
2f7ab126 MO |
471 | KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ |
472 | -Zallow-features= $(HOSTRUSTFLAGS) | |
f92d19e0 LA |
473 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
474 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 475 | |
1da177e4 | 476 | # Make variables (CC, etc...) |
1da177e4 | 477 | CPP = $(CC) -E |
a0d1c951 | 478 | ifneq ($(LLVM),) |
e9c28192 NC |
479 | CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) |
480 | LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) | |
481 | AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) | |
482 | NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) | |
483 | OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) | |
484 | OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) | |
485 | READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) | |
486 | STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) | |
a0d1c951 MY |
487 | else |
488 | CC = $(CROSS_COMPILE)gcc | |
489 | LD = $(CROSS_COMPILE)ld | |
1da177e4 LT |
490 | AR = $(CROSS_COMPILE)ar |
491 | NM = $(CROSS_COMPILE)nm | |
1da177e4 LT |
492 | OBJCOPY = $(CROSS_COMPILE)objcopy |
493 | OBJDUMP = $(CROSS_COMPILE)objdump | |
eefb8c12 | 494 | READELF = $(CROSS_COMPILE)readelf |
a0d1c951 MY |
495 | STRIP = $(CROSS_COMPILE)strip |
496 | endif | |
2f7ab126 MO |
497 | RUSTC = rustc |
498 | RUSTDOC = rustdoc | |
499 | RUSTFMT = rustfmt | |
500 | CLIPPY_DRIVER = clippy-driver | |
501 | BINDGEN = bindgen | |
502 | CARGO = cargo | |
e83b9f55 | 503 | PAHOLE = pahole |
c9a0f3b8 | 504 | RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids |
73a4f6db MY |
505 | LEX = flex |
506 | YACC = bison | |
1da177e4 | 507 | AWK = awk |
caa27b66 | 508 | INSTALLKERNEL := installkernel |
436e980e | 509 | DEPMOD = depmod |
1da177e4 | 510 | PERL = perl |
e9781b52 | 511 | PYTHON3 = python3 |
1da177e4 | 512 | CHECK = sparse |
858805b3 | 513 | BASH = bash |
e4a42c82 DE |
514 | KGZIP = gzip |
515 | KBZIP2 = bzip2 | |
516 | KLZOP = lzop | |
8dfb61dc DE |
517 | LZMA = lzma |
518 | LZ4 = lz4c | |
519 | XZ = xz | |
48f7ddf7 | 520 | ZSTD = zstd |
8dfb61dc | 521 | |
9741e07e JO |
522 | PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) |
523 | ||
80a7d1d9 | 524 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 525 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
0c22be07 | 526 | NOSTDINC_FLAGS := |
6588169d | 527 | CFLAGS_MODULE = |
2f7ab126 | 528 | RUSTFLAGS_MODULE = |
6588169d SR |
529 | AFLAGS_MODULE = |
530 | LDFLAGS_MODULE = | |
1da177e4 | 531 | CFLAGS_KERNEL = |
2f7ab126 | 532 | RUSTFLAGS_KERNEL = |
1da177e4 | 533 | AFLAGS_KERNEL = |
8debed3e | 534 | LDFLAGS_vmlinux = |
1da177e4 | 535 | |
abbf1590 DH |
536 | # Use USERINCLUDE when you must reference the UAPI directories only. |
537 | USERINCLUDE := \ | |
9d022c54 MY |
538 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
539 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 540 | -I$(srctree)/include/uapi \ |
3308b285 | 541 | -I$(objtree)/include/generated/uapi \ |
ce6ed1c4 | 542 | -include $(srctree)/include/linux/compiler-version.h \ |
abbf1590 DH |
543 | -include $(srctree)/include/linux/kconfig.h |
544 | ||
1da177e4 LT |
545 | # Use LINUXINCLUDE when you must reference the include/ directory. |
546 | # Needed to be compatible with the O= option | |
abbf1590 | 547 | LINUXINCLUDE := \ |
9d022c54 MY |
548 | -I$(srctree)/arch/$(SRCARCH)/include \ |
549 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
051f278e | 550 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ |
f8224f7f MY |
551 | -I$(objtree)/include \ |
552 | $(USERINCLUDE) | |
1da177e4 | 553 | |
42a92bcc | 554 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 555 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 556 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
b89f25ea | 557 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
3bc753c0 | 558 | -Werror=return-type -Wno-format-security -funsigned-char \ |
e8c07082 | 559 | -std=gnu11 |
433dc2eb | 560 | KBUILD_CPPFLAGS := -D__KERNEL__ |
2f7ab126 | 561 | KBUILD_RUSTFLAGS := $(rust_common_flags) \ |
c83b16ce | 562 | --target=$(objtree)/scripts/target.json \ |
2f7ab126 MO |
563 | -Cpanic=abort -Cembed-bitcode=n -Clto=n \ |
564 | -Cforce-unwind-tables=n -Ccodegen-units=1 \ | |
565 | -Csymbol-mangling-version=v0 \ | |
566 | -Crelocation-model=static \ | |
567 | -Zfunction-sections=n \ | |
568 | -Dclippy::float_arithmetic | |
569 | ||
80c00ba9 SR |
570 | KBUILD_AFLAGS_KERNEL := |
571 | KBUILD_CFLAGS_KERNEL := | |
2f7ab126 | 572 | KBUILD_RUSTFLAGS_KERNEL := |
6588169d SR |
573 | KBUILD_AFLAGS_MODULE := -DMODULE |
574 | KBUILD_CFLAGS_MODULE := -DMODULE | |
2f7ab126 | 575 | KBUILD_RUSTFLAGS_MODULE := --cfg MODULE |
10df0638 | 576 | KBUILD_LDFLAGS_MODULE := |
d503ac53 | 577 | KBUILD_LDFLAGS := |
5241ab4c | 578 | CLANG_FLAGS := |
1da177e4 | 579 | |
2f7ab126 MO |
580 | ifeq ($(KBUILD_CLIPPY),1) |
581 | RUSTC_OR_CLIPPY_QUIET := CLIPPY | |
582 | RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) | |
583 | else | |
584 | RUSTC_OR_CLIPPY_QUIET := RUSTC | |
585 | RUSTC_OR_CLIPPY = $(RUSTC) | |
586 | endif | |
587 | ||
588 | ifdef RUST_LIB_SRC | |
589 | export RUST_LIB_SRC | |
590 | endif | |
591 | ||
592 | # Allows the usage of unstable features in stable compilers. | |
593 | export RUSTC_BOOTSTRAP := 1 | |
594 | ||
d5ea4fec | 595 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG |
2f7ab126 MO |
596 | export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO |
597 | export HOSTRUSTC KBUILD_HOSTRUSTFLAGS | |
d9b5665f | 598 | export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL |
d8d2d382 | 599 | export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
48f7ddf7 | 600 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD |
7bac9870 | 601 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
f67695c9 | 602 | export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS |
1da177e4 | 603 | |
d503ac53 | 604 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 | 605 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
2f7ab126 | 606 | export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE |
222d394d | 607 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
2f7ab126 MO |
608 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
609 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL | |
9741e07e | 610 | export PAHOLE_FLAGS |
1da177e4 | 611 | |
1da177e4 LT |
612 | # Files to ignore in find ... statements |
613 | ||
ae63b2d7 PB |
614 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
615 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
616 | -prune -o | |
450c6076 JJ |
617 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
618 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
619 | |
620 | # =========================================================================== | |
621 | # Rules shared between *config targets and build targets | |
622 | ||
312a3d09 | 623 | # Basic helpers built in scripts/basic/ |
4f193362 | 624 | PHONY += scripts_basic |
1da177e4 LT |
625 | scripts_basic: |
626 | $(Q)$(MAKE) $(build)=scripts/basic | |
627 | ||
4f193362 | 628 | PHONY += outputmakefile |
2728fcfa | 629 | ifdef building_out_of_srctree |
e8e83a23 | 630 | # Before starting out-of-tree build, make sure the source tree is clean. |
fd5f0cd6 JB |
631 | # outputmakefile generates a Makefile in the output directory, if using a |
632 | # separate output directory. This allows convenient use of make in the | |
633 | # output directory. | |
3a51ff34 VK |
634 | # At the same time when output Makefile generated, generate .gitignore to |
635 | # ignore whole output directory | |
2728fcfa MY |
636 | |
637 | quiet_cmd_makefile = GEN Makefile | |
638 | cmd_makefile = { \ | |
639 | echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ | |
640 | echo "include $(srctree)/Makefile"; \ | |
641 | } > Makefile | |
642 | ||
1da177e4 | 643 | outputmakefile: |
4b098659 | 644 | @if [ -f $(srctree)/.config -o \ |
e8e83a23 MY |
645 | -d $(srctree)/include/config -o \ |
646 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
647 | echo >&2 "***"; \ | |
648 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
649 | echo >&2 "*** in $(abs_srctree)";\ | |
650 | echo >&2 "***"; \ | |
651 | false; \ | |
652 | fi | |
92979997 | 653 | $(Q)ln -fsn $(srctree) source |
2728fcfa | 654 | $(call cmd,makefile) |
156e7cbb MY |
655 | $(Q)test -e .gitignore || \ |
656 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
fd5f0cd6 | 657 | endif |
1da177e4 | 658 | |
db07562a ND |
659 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
660 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
661 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
662 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
6072b2c4 | 663 | CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) |
db07562a ND |
664 | |
665 | ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) | |
6f5b41a2 | 666 | include $(srctree)/scripts/Makefile.clang |
ae6b289a CF |
667 | endif |
668 | ||
57fd251c MY |
669 | # Include this also for config targets because some architectures need |
670 | # cc-cross-prefix to determine CROSS_COMPILE. | |
805b2e1d | 671 | ifdef need-compiler |
57fd251c | 672 | include $(srctree)/scripts/Makefile.compiler |
805b2e1d | 673 | endif |
57fd251c | 674 | |
2042b548 | 675 | ifdef config-build |
1da177e4 LT |
676 | # =========================================================================== |
677 | # *config targets only - make sure prerequisites are updated, and descend | |
678 | # in scripts/kconfig to make the *config target | |
679 | ||
680 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
681 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
682 | # used for 'make defconfig' | |
3204a7fb | 683 | include $(srctree)/arch/$(SRCARCH)/Makefile |
315bab4e | 684 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 685 | |
36de077b | 686 | config: outputmakefile scripts_basic FORCE |
31110ebb SR |
687 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
688 | ||
36de077b | 689 | %config: outputmakefile scripts_basic FORCE |
1da177e4 LT |
690 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
691 | ||
2042b548 | 692 | else #!config-build |
1da177e4 LT |
693 | # =========================================================================== |
694 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
695 | # targets and others. In general all targets except *config targets. | |
696 | ||
2c1f4f12 | 697 | # If building an external module we do not care about the all: rule |
121c2a13 | 698 | # but instead __all depend on modules |
2c1f4f12 MY |
699 | PHONY += all |
700 | ifeq ($(KBUILD_EXTMOD),) | |
121c2a13 | 701 | __all: all |
2c1f4f12 | 702 | else |
121c2a13 | 703 | __all: modules |
2c1f4f12 MY |
704 | endif |
705 | ||
32164845 MY |
706 | targets := |
707 | ||
2c1f4f12 MY |
708 | # Decide whether to build built-in, modular, or both. |
709 | # Normally, just do built-in. | |
710 | ||
711 | KBUILD_MODULES := | |
712 | KBUILD_BUILTIN := 1 | |
713 | ||
714 | # If we have only "make modules", don't compile built-in objects. | |
2c1f4f12 | 715 | ifeq ($(MAKECMDGOALS),modules) |
4b50c8c4 | 716 | KBUILD_BUILTIN := |
2c1f4f12 MY |
717 | endif |
718 | ||
719 | # If we have "make <whatever> modules", compile modules | |
720 | # in addition to whatever we do anyway. | |
721 | # Just "make" or "make all" shall build modules as well | |
722 | ||
6ad7cbc0 | 723 | ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) |
2c1f4f12 MY |
724 | KBUILD_MODULES := 1 |
725 | endif | |
726 | ||
727 | ifeq ($(MAKECMDGOALS),) | |
728 | KBUILD_MODULES := 1 | |
729 | endif | |
730 | ||
731 | export KBUILD_MODULES KBUILD_BUILTIN | |
732 | ||
2042b548 | 733 | ifdef need-config |
d93a18f2 MY |
734 | include include/config/auto.conf |
735 | endif | |
736 | ||
1da177e4 | 737 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 | 738 | # Objects we will link into vmlinux / subdirs we need to visit |
5750121a MY |
739 | core-y := |
740 | drivers-y := | |
1da177e4 | 741 | libs-y := lib/ |
1da177e4 LT |
742 | endif # KBUILD_EXTMOD |
743 | ||
315bab4e MY |
744 | # The all: target is the default when no target is given on the |
745 | # command line. | |
746 | # This allow a user to issue only 'make' to build a kernel including modules | |
747 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
748 | all: vmlinux | |
749 | ||
7d73c3e9 ND |
750 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage |
751 | ifdef CONFIG_CC_IS_GCC | |
752 | CFLAGS_GCOV += -fno-tree-loop-im | |
753 | endif | |
5aadfdeb | 754 | export CFLAGS_GCOV |
315bab4e | 755 | |
b1f4ff74 PZ |
756 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
757 | ifdef CONFIG_FUNCTION_TRACER | |
758 | CC_FLAGS_FTRACE := -pg | |
759 | endif | |
760 | ||
3204a7fb | 761 | include $(srctree)/arch/$(SRCARCH)/Makefile |
1da177e4 | 762 | |
2042b548 MY |
763 | ifdef need-config |
764 | ifdef may-sync-config | |
315bab4e MY |
765 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
766 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
767 | # because some architectures define CROSS_COMPILE there. | |
d2f8ae0e | 768 | include include/config/auto.conf.cmd |
1da177e4 | 769 | |
05850719 MY |
770 | $(KCONFIG_CONFIG): |
771 | @echo >&2 '***' | |
772 | @echo >&2 '*** Configuration file "$@" not found!' | |
773 | @echo >&2 '***' | |
774 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
775 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
776 | @echo >&2 '***' | |
777 | @/bin/false | |
1da177e4 | 778 | |
61277981 UM |
779 | # The actual configuration files used during the build are stored in |
780 | # include/generated/ and include/config/. Update them if .config is newer than | |
781 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
782 | # |
783 | # This exploits the 'multi-target pattern rule' trick. | |
784 | # The syncconfig should be executed only once to make all the targets. | |
f463c351 | 785 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) |
d952cfaf MY |
786 | # |
787 | # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, | |
788 | # so you cannot notice that Kconfig is waiting for the user input. | |
2f7ab126 | 789 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) |
d952cfaf MY |
790 | $(Q)$(kecho) " SYNC $@" |
791 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
2042b548 | 792 | else # !may-sync-config |
d7942413 MY |
793 | # External modules and some install targets need include/generated/autoconf.h |
794 | # and include/config/auto.conf but do not care if they are up-to-date. | |
795 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
796 | PHONY += include/config/auto.conf |
797 | ||
798 | include/config/auto.conf: | |
4b098659 | 799 | @test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
800 | echo >&2; \ |
801 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
802 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
803 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
804 | echo >&2 ; \ | |
9ee4e336 SR |
805 | /bin/false) |
806 | ||
d7942413 | 807 | endif # may-sync-config |
2042b548 | 808 | endif # need-config |
1da177e4 | 809 | |
7d73c3e9 | 810 | KBUILD_CFLAGS += -fno-delete-null-pointer-checks |
ef6000b4 | 811 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
812 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
813 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
6f303d60 | 814 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
a1c48bb1 | 815 | |
15f5db60 MY |
816 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
817 | KBUILD_CFLAGS += -O2 | |
2f7ab126 | 818 | KBUILD_RUSTFLAGS += -Copt-level=2 |
15f5db60 MY |
819 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
820 | KBUILD_CFLAGS += -Os | |
2f7ab126 | 821 | KBUILD_RUSTFLAGS += -Copt-level=s |
815eb71e | 822 | endif |
1da177e4 | 823 | |
2f7ab126 MO |
824 | # Always set `debug-assertions` and `overflow-checks` because their default |
825 | # depends on `opt-level` and `debug-assertions`, respectively. | |
826 | KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) | |
827 | KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) | |
828 | ||
69102311 | 829 | # Tell gcc to never replace conditional load with a non-conditional one |
7d73c3e9 ND |
830 | ifdef CONFIG_CC_IS_GCC |
831 | # gcc-10 renamed --param=allow-store-data-races=0 to | |
832 | # -fno-allow-store-data-races. | |
69102311 | 833 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) |
b1112139 | 834 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
7d73c3e9 | 835 | endif |
69102311 | 836 | |
1873e870 AK |
837 | ifdef CONFIG_READABLE_ASM |
838 | # Disable optimizations that make assembler listings hard to read. | |
839 | # reorder blocks reorders the control in the function | |
840 | # ipa clone creates specialized cloned functions | |
841 | # partial inlining inlines only parts of functions | |
7d73c3e9 | 842 | KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining |
1873e870 AK |
843 | endif |
844 | ||
08f67461 | 845 | ifneq ($(CONFIG_FRAME_WARN),0) |
a83e4ca2 | 846 | KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
35bb5b1e AK |
847 | endif |
848 | ||
893ab004 | 849 | stackp-flags-y := -fno-stack-protector |
050e9baa LT |
850 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
851 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
852 | |
853 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 854 | |
efa80b02 MY |
855 | KBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror |
856 | KBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y) | |
f0be87c4 | 857 | KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds |
3fe617cc | 858 | |
2f7ab126 MO |
859 | KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings |
860 | KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) | |
861 | ||
076f421d | 862 | ifdef CONFIG_CC_IS_CLANG |
e8c07082 | 863 | # The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. |
a1494304 | 864 | KBUILD_CFLAGS += -Wno-gnu |
d936eb23 LT |
865 | else |
866 | ||
49832c81 RD |
867 | # gcc inanely warns about local variables called 'main' |
868 | KBUILD_CFLAGS += -Wno-main | |
cfe17c9b MY |
869 | endif |
870 | ||
885480b0 NC |
871 | # These warnings generated too much noise in a regular build. |
872 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
873 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) | |
0a5f4176 | 874 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
6272cc38 | 875 | |
49beadbd LT |
876 | # These result in bogus false positives |
877 | KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) | |
878 | ||
1da177e4 | 879 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 880 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
2f7ab126 | 881 | KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y |
1da177e4 | 882 | else |
7e9501fd RV |
883 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
884 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
885 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
886 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
887 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
2f7ab126 MO |
888 | # In the Rust target specification, "frame-pointer" is set explicitly |
889 | # to "may-omit". | |
7e9501fd | 890 | ifndef CONFIG_FUNCTION_TRACER |
a0f97e06 | 891 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 892 | endif |
7e9501fd | 893 | endif |
1da177e4 | 894 | |
f0fe00d4 | 895 | # Initialize all stack variables with a 0xAA pattern. |
896 | ifdef CONFIG_INIT_STACK_ALL_PATTERN | |
709a972e KC |
897 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern |
898 | endif | |
899 | ||
f0fe00d4 | 900 | # Initialize all stack variables with a zero value. |
901 | ifdef CONFIG_INIT_STACK_ALL_ZERO | |
f0fe00d4 | 902 | KBUILD_CFLAGS += -ftrivial-auto-var-init=zero |
607e57c6 KC |
903 | ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER |
904 | # https://github.com/llvm/llvm-project/issues/44842 | |
4e3feaad NC |
905 | CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang |
906 | export CC_AUTO_VAR_INIT_ZERO_ENABLER | |
907 | KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) | |
f0fe00d4 | 908 | endif |
f02003c8 | 909 | endif |
f0fe00d4 | 910 | |
39218ff4 KC |
911 | # While VLAs have been removed, GCC produces unreachable stack probes |
912 | # for the randomize_kstack_offset feature. Disable it for all compilers. | |
913 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) | |
914 | ||
a82adfd5 KC |
915 | # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). |
916 | ifdef CONFIG_ZERO_CALL_USED_REGS | |
917 | KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr | |
918 | endif | |
919 | ||
606576ce | 920 | ifdef CONFIG_FUNCTION_TRACER |
3b15cdc1 ST |
921 | ifdef CONFIG_FTRACE_MCOUNT_USE_CC |
922 | CC_FLAGS_FTRACE += -mrecord-mcount | |
2f4df001 VG |
923 | ifdef CONFIG_HAVE_NOP_MCOUNT |
924 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
925 | CC_FLAGS_FTRACE += -mnop-mcount | |
926 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
927 | endif | |
928 | endif | |
07d04081 | 929 | endif |
22c8542d | 930 | ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL |
280981d6 SV |
931 | ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT |
932 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
933 | endif | |
22c8542d | 934 | endif |
3b15cdc1 ST |
935 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
936 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
937 | BUILD_C_RECORDMCOUNT := y | |
938 | export BUILD_C_RECORDMCOUNT | |
939 | endif | |
940 | endif | |
a2546fae | 941 | ifdef CONFIG_HAVE_FENTRY |
7d73c3e9 | 942 | # s390-linux-gnu-gcc did not support -mfentry until gcc-9. |
f28bc3c3 VG |
943 | ifeq ($(call cc-option-yn, -mfentry),y) |
944 | CC_FLAGS_FTRACE += -mfentry | |
945 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
946 | endif | |
a2546fae | 947 | endif |
f28bc3c3 VG |
948 | export CC_FLAGS_FTRACE |
949 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
950 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
16444a8a ACM |
951 | endif |
952 | ||
91341d4b SR |
953 | # We trigger additional mismatches with less inlining |
954 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
7d73c3e9 | 955 | KBUILD_CFLAGS += -fno-inline-functions-called-once |
91341d4b SR |
956 | endif |
957 | ||
2f7ab126 | 958 | # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). |
90ad4052 | 959 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 | 960 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
2f7ab126 | 961 | KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y |
e85d1d65 | 962 | LDFLAGS_vmlinux += --gc-sections |
90ad4052 MY |
963 | endif |
964 | ||
d08b9f0c | 965 | ifdef CONFIG_SHADOW_CALL_STACK |
9beccca0 | 966 | ifndef CONFIG_DYNAMIC_SCS |
d08b9f0c ST |
967 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack |
968 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) | |
9beccca0 | 969 | endif |
d08b9f0c ST |
970 | export CC_FLAGS_SCS |
971 | endif | |
972 | ||
dc5723b0 ST |
973 | ifdef CONFIG_LTO_CLANG |
974 | ifdef CONFIG_LTO_CLANG_THIN | |
2b868952 | 975 | CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit |
7f69180b | 976 | KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache |
dc5723b0 | 977 | else |
2b868952 | 978 | CC_FLAGS_LTO := -flto |
dc5723b0 ST |
979 | endif |
980 | CC_FLAGS_LTO += -fvisibility=hidden | |
22d429e7 ST |
981 | |
982 | # Limit inlining across translation units to reduce binary size | |
983 | KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 | |
24845dcb | 984 | |
0236526d TV |
985 | # Check for frame size exceeding threshold during prolog/epilog insertion |
986 | # when using lld < 13.0.0. | |
24845dcb | 987 | ifneq ($(CONFIG_FRAME_WARN),0) |
fccb3d3e | 988 | ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) |
24845dcb ND |
989 | KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) |
990 | endif | |
dc5723b0 | 991 | endif |
0236526d | 992 | endif |
dc5723b0 ST |
993 | |
994 | ifdef CONFIG_LTO | |
5e95325f ST |
995 | KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) |
996 | KBUILD_AFLAGS += -fno-lto | |
dc5723b0 ST |
997 | export CC_FLAGS_LTO |
998 | endif | |
999 | ||
cf68fffb | 1000 | ifdef CONFIG_CFI_CLANG |
89245600 | 1001 | CC_FLAGS_CFI := -fsanitize=kcfi |
cf68fffb ST |
1002 | KBUILD_CFLAGS += $(CC_FLAGS_CFI) |
1003 | export CC_FLAGS_CFI | |
1004 | endif | |
1005 | ||
d49a0626 PZ |
1006 | ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) |
1007 | KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) | |
09c60546 FT |
1008 | endif |
1009 | ||
e8e69931 | 1010 | # arch Makefile may override CC so keep this after arch Makefile is included |
04e85bbf | 1011 | NOSTDINC_FLAGS += -nostdinc |
e8e69931 | 1012 | |
1da177e4 | 1013 | # warn about C99 declaration after statement |
a33e7ae2 | 1014 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 1015 | |
0bb95f80 | 1016 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
8289f913 | 1017 | KBUILD_CFLAGS += -Wvla |
0bb95f80 | 1018 | |
070b98bf | 1019 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 1020 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 1021 | |
552a23a0 GS |
1022 | # In order to make sure new function cast mismatches are not introduced |
1023 | # in the kernel (to avoid tripping CFI checking), the kernel should be | |
1024 | # globally built with -Wcast-function-type. | |
1025 | KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) | |
1026 | ||
217c3e01 SR |
1027 | # disable stringop warnings in gcc 8+ |
1028 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
1029 | ||
5c45de21 | 1030 | # We'll want to enable this eventually, but it's not going away for 5.7 at least |
5a76021c | 1031 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
5c45de21 | 1032 | |
adc71920 LT |
1033 | # Another good warning that we'll want to enable eventually |
1034 | KBUILD_CFLAGS += $(call cc-disable-warning, restrict) | |
1035 | ||
78a5255f | 1036 | # Enabled with W=2, disabled by default as noisy |
7d73c3e9 ND |
1037 | ifdef CONFIG_CC_IS_GCC |
1038 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
1039 | endif | |
78a5255f | 1040 | |
86cffecd KC |
1041 | # The allocators already balk at large sizes, so silence the compiler |
1042 | # warnings for bounds checks involving those possible values. While | |
1043 | # -Wno-alloc-size-larger-than would normally be used here, earlier versions | |
1044 | # of gcc (<9.1) weirdly don't handle the option correctly when _other_ | |
1045 | # warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX | |
1046 | # doesn't work (as it is documented to), silently resolving to "0" prior to | |
1047 | # version 9.1 (and producing an error more recently). Numeric values larger | |
1048 | # than PTRDIFF_MAX also don't work prior to version 9.1, which are silently | |
1049 | # ignored, continuing to default to PTRDIFF_MAX. So, left with no other | |
1050 | # choice, we must perform a versioned check to disable this warning. | |
1051 | # https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au | |
88b61e3b ND |
1052 | KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than |
1053 | KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) | |
86cffecd | 1054 | |
fe8d0a41 | 1055 | # disable invalid "can't wrap" optimizations for signed / pointers |
8b42cf2f | 1056 | KBUILD_CFLAGS += -fno-strict-overflow |
d0115552 | 1057 | |
3ce120b1 | 1058 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
7d4eb0d8 | 1059 | KBUILD_CFLAGS += -fno-stack-check |
3ce120b1 | 1060 | |
8f7f5c9f | 1061 | # conserve stack if available |
7d73c3e9 ND |
1062 | ifdef CONFIG_CC_IS_GCC |
1063 | KBUILD_CFLAGS += -fconserve-stack | |
1064 | endif | |
8f7f5c9f | 1065 | |
fe7c36c7 | 1066 | # Prohibit date/time macros, which would make the build non-deterministic |
87de84c9 | 1067 | KBUILD_CFLAGS += -Werror=date-time |
fe7c36c7 | 1068 | |
ea8daa7b DW |
1069 | # enforce correct pointer usage |
1070 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
1071 | ||
c834f0e8 KC |
1072 | # Require designated initializers for all marked structures |
1073 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
1074 | ||
a73619a8 | 1075 | # change __FILE__ to the relative path from the srctree |
a716bd74 | 1076 | KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
a73619a8 | 1077 | |
e0fe0bbe MY |
1078 | # include additional Makefiles when needed |
1079 | include-y := scripts/Makefile.extrawarn | |
6947fd96 | 1080 | include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug |
e0fe0bbe MY |
1081 | include-$(CONFIG_KASAN) += scripts/Makefile.kasan |
1082 | include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan | |
f80be457 | 1083 | include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan |
e0fe0bbe MY |
1084 | include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan |
1085 | include-$(CONFIG_KCOV) += scripts/Makefile.kcov | |
613f4b3e | 1086 | include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct |
e0fe0bbe MY |
1087 | include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins |
1088 | ||
1089 | include $(addprefix $(srctree)/, $(include-y)) | |
a86fe353 | 1090 | |
132305b3 MY |
1091 | # scripts/Makefile.gcc-plugins is intentionally included last. |
1092 | # Do not add $(call cc-option,...) below this line. When you build the kernel | |
1093 | # from the clean source tree, the GCC plugins do not exist at this point. | |
a86fe353 | 1094 | |
2f7ab126 | 1095 | # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments |
8cc7af75 MY |
1096 | KBUILD_CPPFLAGS += $(KCPPFLAGS) |
1097 | KBUILD_AFLAGS += $(KAFLAGS) | |
1098 | KBUILD_CFLAGS += $(KCFLAGS) | |
2f7ab126 | 1099 | KBUILD_RUSTFLAGS += $(KRUSTFLAGS) |
52bcc330 | 1100 | |
a9684337 BW |
1101 | KBUILD_LDFLAGS_MODULE += --build-id=sha1 |
1102 | LDFLAGS_vmlinux += --build-id=sha1 | |
18991197 | 1103 | |
0d362be5 ND |
1104 | KBUILD_LDFLAGS += -z noexecstack |
1105 | ifeq ($(CONFIG_LD_IS_BFD),y) | |
1106 | KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) | |
1107 | endif | |
1108 | ||
5d7d18f5 | 1109 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
0f1fe9d6 | 1110 | LDFLAGS_vmlinux += -X |
5d7d18f5 DH |
1111 | endif |
1112 | ||
5cf896fb | 1113 | ifeq ($(CONFIG_RELR),y) |
ccb2d173 FS |
1114 | # ld.lld before 15 did not support -z pack-relative-relocs. |
1115 | LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs) | |
5cf896fb PC |
1116 | endif |
1117 | ||
59612b24 NC |
1118 | # We never want expected sections to be placed heuristically by the |
1119 | # linker. All sections should be explicitly named in the linker script. | |
1120 | ifdef CONFIG_LD_ORPHAN_WARN | |
e1789d7c | 1121 | LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) |
59612b24 NC |
1122 | endif |
1123 | ||
7f3a59db | 1124 | # Align the bit size of userspace programs with the kernel |
7f58b487 MY |
1125 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
1126 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
7f3a59db | 1127 | |
80591e61 LVO |
1128 | # make the checker run with the right architecture |
1129 | CHECKFLAGS += --arch=$(ARCH) | |
1130 | ||
14516765 LVO |
1131 | # insure the checker run with the right endianness |
1132 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
1133 | ||
1f2f01b1 LVO |
1134 | # the checker needs the correct machine size |
1135 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
1136 | ||
1da177e4 | 1137 | # Default kernel image to build when no specific target is given. |
070b98bf | 1138 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
1139 | # set in the environment |
1140 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
1141 | # this default value | |
1142 | export KBUILD_IMAGE ?= vmlinux | |
1143 | ||
1144 | # | |
1145 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
1146 | # images. Default is /boot, but you can set it to other values | |
1147 | export INSTALL_PATH ?= /boot | |
1148 | ||
f4d4ffc0 JC |
1149 | # |
1150 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
1151 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
1152 | # an argument if needed. Otherwise it defaults to the kernel install path | |
1153 | # | |
1154 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1155 | ||
1da177e4 LT |
1156 | # |
1157 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1158 | # relocations required by build roots. This is not defined in the | |
070b98bf | 1159 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
1160 | # |
1161 | ||
df9df036 | 1162 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
1163 | export MODLIB |
1164 | ||
e00d8880 | 1165 | PHONY += prepare0 |
e2a666d5 | 1166 | |
ccae4cfa | 1167 | export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) |
7f69180b MY |
1168 | export MODORDER := $(extmod_prefix)modules.order |
1169 | export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps | |
47801c97 | 1170 | |
1da177e4 | 1171 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 | 1172 | |
5750121a MY |
1173 | build-dir := . |
1174 | clean-dirs := $(sort . Documentation \ | |
23febe37 | 1175 | $(patsubst %/,%,$(filter %/, $(core-) \ |
95fb6317 | 1176 | $(drivers-) $(libs-)))) |
1da177e4 | 1177 | |
5750121a MY |
1178 | export ARCH_CORE := $(core-y) |
1179 | export ARCH_LIB := $(filter %/, $(libs-y)) | |
1180 | export ARCH_DRIVERS := $(drivers-y) $(drivers-m) | |
f0d50ca0 | 1181 | # Externally visible symbols (used by link-vmlinux.sh) |
5750121a | 1182 | |
32164845 | 1183 | KBUILD_VMLINUX_OBJS := ./built-in.a |
7273ad2b | 1184 | ifdef CONFIG_MODULES |
f0d50ca0 MY |
1185 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) |
1186 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) | |
7273ad2b | 1187 | else |
f0d50ca0 | 1188 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) |
7273ad2b | 1189 | endif |
1da177e4 | 1190 | |
32164845 | 1191 | export KBUILD_VMLINUX_LIBS |
95698570 | 1192 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1da177e4 | 1193 | |
2441e78b | 1194 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
1f50b80a MY |
1195 | # For the kernel to actually contain only the needed exported symbols, |
1196 | # we have to build modules as well to determine what those symbols are. | |
fb2d99be | 1197 | KBUILD_MODULES := 1 |
1f50b80a MY |
1198 | endif |
1199 | ||
32164845 MY |
1200 | # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 |
1201 | quiet_cmd_ar_vmlinux.a = AR $@ | |
1202 | cmd_ar_vmlinux.a = \ | |
1203 | rm -f $@; \ | |
1204 | $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ | |
fb3041d6 | 1205 | $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) |
fbe6e37d | 1206 | |
32164845 | 1207 | targets += vmlinux.a |
5e9e95cc | 1208 | vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE |
32164845 | 1209 | $(call if_changed,ar_vmlinux.a) |
2441e78b | 1210 | |
7a342e6c MY |
1211 | PHONY += vmlinux_o |
1212 | vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) | |
9c5a0ac3 | 1213 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o |
741f98fe | 1214 | |
7a342e6c MY |
1215 | vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o |
1216 | @: | |
1217 | ||
5d4aeffb | 1218 | PHONY += vmlinux |
8debed3e MY |
1219 | # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, |
1220 | # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is | |
1221 | # unrelated; the decompressors just happen to have the same base name, | |
1222 | # arch/*/boot/compressed/vmlinux. | |
1223 | # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. | |
1224 | # | |
1225 | # _LDFLAGS_vmlinux is a workaround for the 'private export' bug: | |
1226 | # https://savannah.gnu.org/bugs/?61463 | |
1227 | # For Make > 4.4, the following simple code will work: | |
1228 | # vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1229 | vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1230 | vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) | |
5d4aeffb MY |
1231 | vmlinux: vmlinux.o $(KBUILD_LDS) modpost |
1232 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux | |
392885ee | 1233 | |
38385f8f | 1234 | # The actual objects are generated when descending, |
1da177e4 | 1235 | # make sure no implicit rule kicks in |
9c5a0ac3 | 1236 | $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; |
1da177e4 | 1237 | |
1cb86b6c | 1238 | ifeq ($(origin KERNELRELEASE),file) |
ec31f868 | 1239 | filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) |
1cb86b6c MY |
1240 | else |
1241 | filechk_kernel.release = echo $(KERNELRELEASE) | |
1242 | endif | |
0d0e7718 | 1243 | |
83a35e36 | 1244 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
24512795 | 1245 | include/config/kernel.release: FORCE |
0d0e7718 | 1246 | $(call filechk,kernel.release) |
cb58455c | 1247 | |
d8821622 MY |
1248 | # Additional helpers built in scripts/ |
1249 | # Carefully list dependencies so we do not try to build scripts twice | |
1250 | # in parallel | |
1251 | PHONY += scripts | |
60df1aee | 1252 | scripts: scripts_basic scripts_dtc |
d8821622 | 1253 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1254 | |
1da177e4 | 1255 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1256 | # or the modules are listed in "prepare". |
1257 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1258 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1259 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1260 | |
a5139fb3 | 1261 | PHONY += prepare archprepare |
5bb78269 | 1262 | |
36de077b | 1263 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
5e9e95cc | 1264 | asm-generic $(version_h) include/generated/utsrelease.h \ |
a55f283e | 1265 | include/generated/compile.h include/generated/autoconf.h remove-stale-files |
5bb78269 | 1266 | |
65bba042 | 1267 | prepare0: archprepare |
60df1aee | 1268 | $(Q)$(MAKE) $(build)=scripts/mod |
ed7ceac1 | 1269 | $(Q)$(MAKE) $(build)=. prepare |
86feeaa8 | 1270 | |
1da177e4 | 1271 | # All the preparing.. |
0d989ac2 | 1272 | prepare: prepare0 |
2f7ab126 MO |
1273 | ifdef CONFIG_RUST |
1274 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v | |
1275 | $(Q)$(MAKE) $(build)=rust | |
1276 | endif | |
b9ab5ebb | 1277 | |
1476fee5 MY |
1278 | PHONY += remove-stale-files |
1279 | remove-stale-files: | |
1280 | $(Q)$(srctree)/scripts/remove-stale-files | |
1281 | ||
2c1f4f12 | 1282 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1283 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1284 | ||
2c1f4f12 MY |
1285 | PHONY += asm-generic uapi-asm-generic |
1286 | asm-generic: uapi-asm-generic | |
037fc336 MY |
1287 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
1288 | generic=include/asm-generic | |
2c1f4f12 | 1289 | uapi-asm-generic: |
037fc336 MY |
1290 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
1291 | generic=include/uapi/asm-generic | |
2c1f4f12 | 1292 | |
1da177e4 LT |
1293 | # Generate some files |
1294 | # --------------------------------------------------------------------------- | |
1295 | ||
1296 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1297 | # needs to be updated, so this check is forced on all builds | |
1298 | ||
1299 | uts_len := 64 | |
63104eec SR |
1300 | define filechk_utsrelease.h |
1301 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1302 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1303 | exit 1; \ | |
1304 | fi; \ | |
ad774086 | 1305 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1306 | endef |
1da177e4 LT |
1307 | |
1308 | define filechk_version.h | |
9b82f13e SL |
1309 | if [ $(SUBLEVEL) -gt 255 ]; then \ |
1310 | echo \#define LINUX_VERSION_CODE $(shell \ | |
207da4c8 | 1311 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ |
9b82f13e SL |
1312 | else \ |
1313 | echo \#define LINUX_VERSION_CODE $(shell \ | |
207da4c8 | 1314 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ |
9b82f13e SL |
1315 | fi; \ |
1316 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ | |
88a68672 SL |
1317 | ((c) > 255 ? 255 : (c)))'; \ |
1318 | echo \#define LINUX_VERSION_MAJOR $(VERSION); \ | |
1319 | echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ | |
1320 | echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) | |
1da177e4 LT |
1321 | endef |
1322 | ||
5c816641 MY |
1323 | $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) |
1324 | $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) | |
43fee2b2 | 1325 | $(version_h): FORCE |
1da177e4 LT |
1326 | $(call filechk,version.h) |
1327 | ||
273b281f | 1328 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1329 | $(call filechk,utsrelease.h) |
1330 | ||
a55f283e MY |
1331 | filechk_compile.h = $(srctree)/scripts/mkcompile_h \ |
1332 | "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" | |
1333 | ||
1334 | include/generated/compile.h: FORCE | |
1335 | $(call filechk,compile.h) | |
1336 | ||
179efcb4 VN |
1337 | PHONY += headerdep |
1338 | headerdep: | |
9663d989 PF |
1339 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1340 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1341 | |
8d730cfb DW |
1342 | # --------------------------------------------------------------------------- |
1343 | # Kernel headers | |
8d730cfb | 1344 | |
e6883b18 SR |
1345 | #Default location for installed headers |
1346 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1347 | |
59b2bd05 MY |
1348 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
1349 | cmd_headers_install = \ | |
1350 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1351 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1352 | usr/include $(INSTALL_HDR_PATH) | |
e6883b18 | 1353 | |
8d730cfb | 1354 | PHONY += headers_install |
59b2bd05 MY |
1355 | headers_install: headers |
1356 | $(call cmd,headers_install) | |
6520fe55 | 1357 | |
59b2bd05 | 1358 | PHONY += archheaders archscripts |
e6883b18 | 1359 | |
a5bae54c | 1360 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
6d716275 | 1361 | |
59b2bd05 MY |
1362 | PHONY += headers |
1363 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
1b620d53 | 1364 | $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) |
d5470d14 MY |
1365 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
1366 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1f85712e | 1367 | |
e949f4c2 | 1368 | ifdef CONFIG_HEADERS_INSTALL |
59b2bd05 | 1369 | prepare: headers |
e949f4c2 | 1370 | endif |
68475359 | 1371 | |
bdd7714b MY |
1372 | PHONY += scripts_unifdef |
1373 | scripts_unifdef: scripts_basic | |
1374 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1375 | ||
14ccc638 MY |
1376 | # --------------------------------------------------------------------------- |
1377 | # Install | |
1378 | ||
1379 | # Many distributions have the custom install script, /sbin/installkernel. | |
75ef3122 RD |
1380 | # If DKMS is installed, 'make install' will eventually recurse back |
1381 | # to this Makefile to build and install external modules. | |
14ccc638 MY |
1382 | # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. |
1383 | ||
f774f5bb MY |
1384 | quiet_cmd_install = INSTALL $(INSTALL_PATH) |
1385 | cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh | |
14ccc638 | 1386 | |
1bb0b18a MY |
1387 | # --------------------------------------------------------------------------- |
1388 | # Tools | |
1389 | ||
03f16cd0 | 1390 | ifdef CONFIG_OBJTOOL |
0d989ac2 MY |
1391 | prepare: tools/objtool |
1392 | endif | |
1393 | ||
1394 | ifdef CONFIG_BPF | |
1395 | ifdef CONFIG_DEBUG_INFO_BTF | |
1396 | prepare: tools/bpf/resolve_btfids | |
1397 | endif | |
1398 | endif | |
1399 | ||
1400 | PHONY += resolve_btfids_clean | |
1401 | ||
1402 | resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids | |
1403 | ||
1404 | # tools/bpf/resolve_btfids directory might not exist | |
1405 | # in output directory, skip its clean in that case | |
1406 | resolve_btfids_clean: | |
1407 | ifneq ($(wildcard $(resolve_btfids_O)),) | |
1408 | $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean | |
1409 | endif | |
1410 | ||
1bb0b18a MY |
1411 | # Clear a bunch of variables before executing the submake |
1412 | ifeq ($(quiet),silent_) | |
1413 | tools_silent=s | |
1414 | endif | |
1415 | ||
1416 | tools/: FORCE | |
1417 | $(Q)mkdir -p $(objtree)/tools | |
1418 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ | |
1419 | ||
1420 | tools/%: FORCE | |
1421 | $(Q)mkdir -p $(objtree)/tools | |
1422 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* | |
1423 | ||
5a5da78b SK |
1424 | # --------------------------------------------------------------------------- |
1425 | # Kernel selftest | |
1426 | ||
1427 | PHONY += kselftest | |
4062eba9 | 1428 | kselftest: headers |
2bc84526 | 1429 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1430 | |
4062eba9 | 1431 | kselftest-%: headers FORCE |
17eac6c2 | 1432 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* |
dcb825a9 | 1433 | |
3d6dee7a BJZ |
1434 | PHONY += kselftest-merge |
1435 | kselftest-merge: | |
1436 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
6d3db46c DR |
1437 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
1438 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
3e4c6948 | 1439 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
3d6dee7a | 1440 | |
37c8a5fa RH |
1441 | # --------------------------------------------------------------------------- |
1442 | # Devicetree files | |
1443 | ||
1444 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1445 | dtstree := arch/$(SRCARCH)/boot/dts | |
1446 | endif | |
1447 | ||
1448 | ifneq ($(dtstree),) | |
1449 | ||
ee476203 | 1450 | %.dtb: dtbs_prepare |
75e89534 | 1451 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
37c8a5fa | 1452 | |
ee476203 | 1453 | %.dtbo: dtbs_prepare |
75e89534 | 1454 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
ce88c9c7 | 1455 | |
ee476203 MY |
1456 | PHONY += dtbs dtbs_prepare dtbs_install dtbs_check |
1457 | dtbs: dtbs_prepare | |
37c8a5fa RH |
1458 | $(Q)$(MAKE) $(build)=$(dtstree) |
1459 | ||
ee476203 MY |
1460 | # include/config/kernel.release is actually needed when installing DTBs because |
1461 | # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make | |
1462 | # dtbs_install depend on it as dtbs_install may run as root. | |
1463 | dtbs_prepare: include/config/kernel.release scripts_dtc | |
1464 | ||
75e89534 | 1465 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) |
e10c4321 | 1466 | export CHECK_DTBS=y |
ec201955 RH |
1467 | endif |
1468 | ||
1469 | ifneq ($(CHECK_DTBS),) | |
1470 | dtbs_prepare: dt_binding_check | |
b5154bf6 MY |
1471 | endif |
1472 | ||
b5154bf6 | 1473 | dtbs_check: dtbs |
4f0e3a57 | 1474 | |
37c8a5fa | 1475 | dtbs_install: |
2431f22a | 1476 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) |
37c8a5fa RH |
1477 | |
1478 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1479 | all: dtbs | |
1480 | endif | |
1481 | ||
1482 | endif | |
1483 | ||
1484 | PHONY += scripts_dtc | |
1485 | scripts_dtc: scripts_basic | |
1486 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1487 | ||
e10c4321 MY |
1488 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) |
1489 | export CHECK_DT_BINDING=y | |
1490 | endif | |
1491 | ||
c473a8d0 | 1492 | PHONY += dt_binding_check |
4f0e3a57 RH |
1493 | dt_binding_check: scripts_dtc |
1494 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1495 | ||
b6acf807 RH |
1496 | PHONY += dt_compatible_check |
1497 | dt_compatible_check: dt_binding_check | |
1498 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ | |
1499 | ||
1da177e4 LT |
1500 | # --------------------------------------------------------------------------- |
1501 | # Modules | |
1502 | ||
1503 | ifdef CONFIG_MODULES | |
1504 | ||
070b98bf | 1505 | # By default, build modules as well |
1da177e4 | 1506 | |
73d1393e | 1507 | all: modules |
1da177e4 | 1508 | |
4b50c8c4 MY |
1509 | # When we're building modules with modversions, we need to consider |
1510 | # the built-in objects during the descend as well, in order to | |
1511 | # make sure the checksums are up to date before we record them. | |
1512 | ifdef CONFIG_MODVERSIONS | |
1513 | KBUILD_BUILTIN := 1 | |
1514 | endif | |
1515 | ||
3fbb43df | 1516 | # Build modules |
551559e1 | 1517 | # |
1da177e4 | 1518 | |
feb113ad | 1519 | # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES |
f73edc89 MY |
1520 | # is an exception. |
1521 | ifdef CONFIG_DEBUG_INFO_BTF_MODULES | |
74d3320f | 1522 | KBUILD_BUILTIN := 1 |
f73edc89 MY |
1523 | modules: vmlinux |
1524 | endif | |
b2c88554 | 1525 | |
f73edc89 | 1526 | modules: modules_prepare |
68980b47 | 1527 | |
1da177e4 | 1528 | # Target to prepare building external modules |
059bc9fc | 1529 | modules_prepare: prepare |
596b0474 | 1530 | $(Q)$(MAKE) $(build)=scripts scripts/module.lds |
1da177e4 | 1531 | |
961ab4a3 MY |
1532 | export modules_sign_only := |
1533 | ||
1534 | ifeq ($(CONFIG_MODULE_SIG),y) | |
1535 | PHONY += modules_sign | |
1536 | modules_sign: modules_install | |
1537 | @: | |
1da177e4 | 1538 | |
961ab4a3 MY |
1539 | # modules_sign is a subset of modules_install. |
1540 | # 'make modules_install modules_sign' is equivalent to 'make modules_install'. | |
1541 | ifeq ($(filter modules_install,$(MAKECMDGOALS)),) | |
1542 | modules_sign_only := y | |
1543 | endif | |
1544 | endif | |
1545 | ||
8ae071fc MY |
1546 | endif # CONFIG_MODULES |
1547 | ||
961ab4a3 MY |
1548 | modinst_pre := |
1549 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
1550 | modinst_pre := __modinst_pre | |
1551 | endif | |
1552 | ||
1553 | modules_install: $(modinst_pre) | |
3e3005df MY |
1554 | PHONY += __modinst_pre |
1555 | __modinst_pre: | |
1da177e4 LT |
1556 | @rm -rf $(MODLIB)/kernel |
1557 | @rm -f $(MODLIB)/source | |
8ae071fc MY |
1558 | @mkdir -p $(MODLIB) |
1559 | ifdef CONFIG_MODULES | |
8e9b4667 | 1560 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1561 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1562 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1563 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1564 | fi |
f65a4868 | 1565 | @sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order |
8ae071fc | 1566 | endif |
2c6d9636 MY |
1567 | @cp -f modules.builtin $(MODLIB)/ |
1568 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ | |
1da177e4 | 1569 | |
1da177e4 LT |
1570 | ### |
1571 | # Cleaning is done on three levels. | |
1572 | # make clean Delete most generated files | |
1573 | # Leave enough to build external modules | |
1574 | # make mrproper Delete the current configuration, and all generated files | |
1575 | # make distclean Remove editor backup files, patch leftover files and the like | |
1576 | ||
1577 | # Directories & files removed with 'make clean' | |
69bc8d38 | 1578 | CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ |
3d32285f | 1579 | modules.builtin modules.builtin.modinfo modules.nsdeps \ |
8afc66e8 | 1580 | compile_commands.json .thinlto-cache rust/test rust/doc \ |
7ea01d31 | 1581 | rust-project.json .vmlinux.objs .vmlinux.export.c |
1da177e4 LT |
1582 | |
1583 | # Directories & files removed with 'make mrproper' | |
0663c68c | 1584 | MRPROPER_FILES += include/config include/generated \ |
b0d6207b | 1585 | arch/$(SRCARCH)/include/generated .objdiff \ |
0663c68c MY |
1586 | debian snap tar-install \ |
1587 | .config .config.old .version \ | |
46457133 | 1588 | Module.symvers \ |
5cca3606 | 1589 | certs/signing_key.pem \ |
b31f2a49 NJ |
1590 | certs/x509.genkey \ |
1591 | vmlinux-gdb.py \ | |
81f59a26 | 1592 | *.spec rpmbuild \ |
c83b16ce | 1593 | rust/libmacros.so |
1da177e4 LT |
1594 | |
1595 | # clean - Delete most, but leave enough to build external modules | |
1596 | # | |
1da177e4 | 1597 | clean: rm-files := $(CLEAN_FILES) |
1da177e4 | 1598 | |
76cd306d | 1599 | PHONY += archclean vmlinuxclean |
1da177e4 | 1600 | |
bd1ee804 PM |
1601 | vmlinuxclean: |
1602 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1603 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 | 1604 | |
50d3a3f8 | 1605 | clean: archclean vmlinuxclean resolve_btfids_clean |
1da177e4 LT |
1606 | |
1607 | # mrproper - Delete all generated files, including .config | |
1608 | # | |
1da177e4 | 1609 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
cb43fb57 | 1610 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1611 | |
b421b8a6 | 1612 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1613 | $(mrproper-dirs): |
1614 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1615 | ||
b421b8a6 | 1616 | mrproper: clean $(mrproper-dirs) |
1da177e4 | 1617 | $(call cmd,rmfiles) |
2f7ab126 MO |
1618 | @find . $(RCS_FIND_IGNORE) \ |
1619 | \( -name '*.rmeta' \) \ | |
1620 | -type f -print | xargs rm -f | |
1da177e4 LT |
1621 | |
1622 | # distclean | |
1623 | # | |
4f193362 | 1624 | PHONY += distclean |
1da177e4 LT |
1625 | |
1626 | distclean: mrproper | |
19c8d912 | 1627 | @find . $(RCS_FIND_IGNORE) \ |
070b98bf | 1628 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df | 1629 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
7a02cec5 MY |
1630 | -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ |
1631 | -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ | |
1da177e4 LT |
1632 | -type f -print | xargs rm -f |
1633 | ||
1634 | ||
1635 | # Packaging of the kernel to various formats | |
1636 | # --------------------------------------------------------------------------- | |
1da177e4 | 1637 | |
bafb6747 | 1638 | %src-pkg: FORCE |
000ec95f | 1639 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
031ecc6d | 1640 | %pkg: include/config/kernel.release FORCE |
000ec95f | 1641 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
1da177e4 LT |
1642 | |
1643 | # Brief documentation of the typical targets used | |
1644 | # --------------------------------------------------------------------------- | |
1645 | ||
5dffbe81 | 1646 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1647 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1648 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1649 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1650 | |
fe69b420 | 1651 | PHONY += help |
1da177e4 LT |
1652 | help: |
1653 | @echo 'Cleaning targets:' | |
5ea084ef | 1654 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1655 | @echo ' enough build support to build external modules' |
5ea084ef | 1656 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1657 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1658 | @echo '' |
1659 | @echo 'Configuration targets:' | |
1660 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1661 | @echo '' | |
1662 | @echo 'Other generic targets:' | |
1663 | @echo ' all - Build all targets marked with [*]' | |
1664 | @echo '* vmlinux - Build the bare kernel' | |
1665 | @echo '* modules - Build all modules' | |
9cc5d74c | 1666 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1667 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1668 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1669 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1670 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1671 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1672 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1673 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1674 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1675 | @echo ' tags/TAGS - Generate tags file for editors' |
1676 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1677 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1678 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1679 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1680 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1681 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1682 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1683 | echo '' |
31b8cc80 | 1684 | @echo 'Static analysers:' |
1da177e4 | 1685 | @echo ' checkstack - Generate a list of stack hogs' |
aa025e7d | 1686 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1687 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1688 | @echo ' export_report - List the usages of all exported symbols' |
74425eee | 1689 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1690 | @echo ' coccicheck - Check with Coccinelle' |
6ad7cbc0 NH |
1691 | @echo ' clang-analyzer - Check with clang static analyzer' |
1692 | @echo ' clang-tidy - Check with clang-tidy' | |
74425eee | 1693 | @echo '' |
eb8305ae MM |
1694 | @echo 'Tools:' |
1695 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1696 | @echo '' | |
31b8cc80 | 1697 | @echo 'Kernel selftest:' |
e51d8dac SK |
1698 | @echo ' kselftest - Build and run kernel selftest' |
1699 | @echo ' Build, install, and boot kernel before' | |
1700 | @echo ' running kselftest on it' | |
1701 | @echo ' Run as root for full coverage' | |
1702 | @echo ' kselftest-all - Build kernel selftest' | |
1703 | @echo ' kselftest-install - Build and install kernel selftest' | |
1704 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1705 | @echo ' kselftest-merge - Merge all the config dependencies of' | |
1706 | @echo ' kselftest to existing .config.' | |
5a5da78b | 1707 | @echo '' |
2f7ab126 MO |
1708 | @echo 'Rust targets:' |
1709 | @echo ' rustavailable - Checks whether the Rust toolchain is' | |
1710 | @echo ' available and, if not, explains why.' | |
1711 | @echo ' rustfmt - Reformat all the Rust code in the kernel' | |
1712 | @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' | |
1713 | @echo ' is formatted, printing a diff otherwise.' | |
1714 | @echo ' rustdoc - Generate Rust documentation' | |
1715 | @echo ' (requires kernel .config)' | |
1716 | @echo ' rusttest - Runs the Rust tests' | |
1717 | @echo ' (requires kernel .config; downloads external repos)' | |
1718 | @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' | |
1719 | @echo ' (requires kernel .config)' | |
1720 | @echo ' dir/file.[os] - Build specified target only' | |
1721 | @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' | |
1722 | @echo ' Run with RUSTFMT=n to skip reformatting if needed.' | |
1723 | @echo ' The output is not intended to be compilable.' | |
1724 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1725 | @echo '' | |
37c8a5fa RH |
1726 | @$(if $(dtstree), \ |
1727 | echo 'Devicetree:'; \ | |
7aa8dd91 SB |
1728 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
1729 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1730 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1731 | echo ' dtbs_check - Validate device tree source files';\ | |
37c8a5fa RH |
1732 | echo '') |
1733 | ||
31b8cc80 RD |
1734 | @echo 'Userspace tools targets:' |
1735 | @echo ' use "make tools/help"' | |
1736 | @echo ' or "cd tools; make help"' | |
1737 | @echo '' | |
1da177e4 | 1738 | @echo 'Kernel packaging:' |
000ec95f | 1739 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
1da177e4 LT |
1740 | @echo '' |
1741 | @echo 'Documentation targets:' | |
cb43fb57 | 1742 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1743 | @echo '' |
01dee188 | 1744 | @echo 'Architecture specific targets ($(SRCARCH)):' |
5c816641 | 1745 | @$(or $(archhelp),\ |
01dee188 | 1746 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1747 | @echo '' |
1748 | @$(if $(boards), \ | |
1749 | $(foreach b, $(boards), \ | |
4234448b | 1750 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
1da177e4 | 1751 | echo '') |
5dffbe81 SB |
1752 | @$(if $(board-dirs), \ |
1753 | $(foreach b, $(board-dirs), \ | |
1754 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1755 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1756 | echo '') | |
1da177e4 | 1757 | |
83d98d73 | 1758 | @echo ' make V=n [targets] 1: verbose build' |
6ae4b986 MY |
1759 | @echo ' 2: give reason for rebuild of target' |
1760 | @echo ' V=1 and V=2 can be combined with V=12' | |
1da177e4 | 1761 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
a64c0440 GU |
1762 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' |
1763 | @echo ' (sparse by default)' | |
701842e3 | 1764 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1765 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
e27128db | 1766 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' |
28bc20dc SR |
1767 | @echo ' 1: warnings which may be relevant and do not occur too often' |
1768 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1769 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
c77d06e7 | 1770 | @echo ' e: warnings are being treated as errors' |
a6de553d | 1771 | @echo ' Multiple levels can be combined with W=12 or W=123' |
ec201955 RH |
1772 | @$(if $(dtstree), \ |
1773 | echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \ | |
1774 | echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \ | |
1775 | ) | |
1da177e4 LT |
1776 | @echo '' |
1777 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1778 | @echo 'For further info see the ./README file' | |
1779 | ||
1780 | ||
5dffbe81 SB |
1781 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1782 | ||
1783 | help-boards: $(help-board-dirs) | |
1784 | ||
fbae4d58 | 1785 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1786 | |
1787 | $(help-board-dirs): help-%: | |
1788 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1789 | @$(if $(boards-per-dir), \ | |
1790 | $(foreach b, $(boards-per-dir), \ | |
1791 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1792 | echo '') | |
1793 | ||
1794 | ||
1da177e4 LT |
1795 | # Documentation targets |
1796 | # --------------------------------------------------------------------------- | |
e8939222 | 1797 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1f050e90 | 1798 | linkcheckdocs dochelp refcheckdocs texinfodocs infodocs |
22cba31b | 1799 | PHONY += $(DOC_TARGETS) |
bc7b752a | 1800 | $(DOC_TARGETS): |
cb43fb57 | 1801 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1802 | |
2f7ab126 MO |
1803 | |
1804 | # Rust targets | |
1805 | # --------------------------------------------------------------------------- | |
1806 | ||
1807 | # "Is Rust available?" target | |
1808 | PHONY += rustavailable | |
1809 | rustavailable: | |
1810 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!" | |
1811 | ||
1812 | # Documentation target | |
1813 | # | |
1814 | # Using the singular to avoid running afoul of `no-dot-config-targets`. | |
1815 | PHONY += rustdoc | |
1816 | rustdoc: prepare | |
1817 | $(Q)$(MAKE) $(build)=rust $@ | |
1818 | ||
1819 | # Testing target | |
1820 | PHONY += rusttest | |
1821 | rusttest: prepare | |
1822 | $(Q)$(MAKE) $(build)=rust $@ | |
1823 | ||
1824 | # Formatting targets | |
1825 | PHONY += rustfmt rustfmtcheck | |
1826 | ||
1827 | # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. | |
1828 | # | |
1829 | # We match using absolute paths since `find` does not resolve them | |
1830 | # when matching, which is a problem when e.g. `srctree` is `..`. | |
1831 | # We `grep` afterwards in order to remove the directory entry itself. | |
1832 | rustfmt: | |
1833 | $(Q)find $(abs_srctree) -type f -name '*.rs' \ | |
1834 | -o -path $(abs_srctree)/rust/alloc -prune \ | |
1835 | -o -path $(abs_objtree)/rust/test -prune \ | |
1836 | | grep -Fv $(abs_srctree)/rust/alloc \ | |
1837 | | grep -Fv $(abs_objtree)/rust/test \ | |
1838 | | grep -Fv generated \ | |
1839 | | xargs $(RUSTFMT) $(rustfmt_flags) | |
1840 | ||
1841 | rustfmtcheck: rustfmt_flags = --check | |
1842 | rustfmtcheck: rustfmt | |
1843 | ||
1844 | # IDE support targets | |
1845 | PHONY += rust-analyzer | |
1846 | rust-analyzer: | |
1847 | $(Q)$(MAKE) $(build)=rust $@ | |
1848 | ||
67274c08 MY |
1849 | # Misc |
1850 | # --------------------------------------------------------------------------- | |
1851 | ||
91ecf7ff MY |
1852 | PHONY += misc-check |
1853 | misc-check: | |
1854 | $(Q)$(srctree)/scripts/misc-check | |
1855 | ||
1856 | all: misc-check | |
1857 | ||
67274c08 | 1858 | PHONY += scripts_gdb |
7a739ce5 | 1859 | scripts_gdb: prepare0 |
1e5ff84f | 1860 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1861 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1862 | |
1863 | ifdef CONFIG_GDB_SCRIPTS | |
1864 | all: scripts_gdb | |
1865 | endif | |
1866 | ||
1da177e4 LT |
1867 | else # KBUILD_EXTMOD |
1868 | ||
c753ccb2 TC |
1869 | filechk_kernel.release = echo $(KERNELRELEASE) |
1870 | ||
1da177e4 LT |
1871 | ### |
1872 | # External module support. | |
1873 | # When building external modules the kernel used as basis is considered | |
1874 | # read-only, and no consistency checks are made and the make | |
1875 | # system is not used on the basis kernel. If updates are required | |
11122b86 | 1876 | # in the basis kernel ordinary make commands (without M=...) must be used. |
1da177e4 | 1877 | |
6212804f MY |
1878 | # We are always building only modules. |
1879 | KBUILD_BUILTIN := | |
1da177e4 | 1880 | KBUILD_MODULES := 1 |
1da177e4 | 1881 | |
5750121a | 1882 | build-dir := $(KBUILD_EXTMOD) |
3d32285f | 1883 | |
7f69180b | 1884 | compile_commands.json: $(extmod_prefix)compile_commands.json |
3d32285f MY |
1885 | PHONY += compile_commands.json |
1886 | ||
76cd306d | 1887 | clean-dirs := $(KBUILD_EXTMOD) |
3d32285f | 1888 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ |
dc5723b0 | 1889 | $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache |
1da177e4 | 1890 | |
6072b2c4 MY |
1891 | PHONY += prepare |
1892 | # now expand this into a simple variable to reduce the cost of shell evaluations | |
1893 | prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) | |
1894 | prepare: | |
129ab0d2 | 1895 | @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ |
6072b2c4 | 1896 | echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ |
129ab0d2 | 1897 | echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ |
6072b2c4 MY |
1898 | echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ |
1899 | fi | |
1900 | ||
fe69b420 | 1901 | PHONY += help |
1da177e4 LT |
1902 | help: |
1903 | @echo ' Building external modules.' | |
1904 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1905 | @echo '' | |
1906 | @echo ' modules - default target, build the module(s)' | |
1907 | @echo ' modules_install - install the module' | |
1908 | @echo ' clean - remove generated files in module directory only' | |
1909 | @echo '' | |
06300b21 | 1910 | |
8ae071fc MY |
1911 | __external_modules_error: |
1912 | @echo >&2 '***' | |
1913 | @echo >&2 '*** The present kernel disabled CONFIG_MODULES.' | |
1914 | @echo >&2 '*** You cannot build or install external modules.' | |
1915 | @echo >&2 '***' | |
1916 | @false | |
1917 | ||
1da177e4 LT |
1918 | endif # KBUILD_EXTMOD |
1919 | ||
3e3005df MY |
1920 | # --------------------------------------------------------------------------- |
1921 | # Modules | |
1922 | ||
7f371813 | 1923 | PHONY += modules modules_install modules_prepare |
3e3005df MY |
1924 | |
1925 | ifdef CONFIG_MODULES | |
1926 | ||
5750121a MY |
1927 | $(MODORDER): $(build-dir) |
1928 | @: | |
1929 | ||
f73edc89 MY |
1930 | # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. |
1931 | # This is solely useful to speed up test compiles. | |
1932 | modules: modpost | |
1933 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) | |
1934 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
1935 | endif | |
3e3005df | 1936 | |
1a998be6 MY |
1937 | PHONY += modules_check |
1938 | modules_check: $(MODORDER) | |
1939 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< | |
1940 | ||
3ac42b21 | 1941 | quiet_cmd_depmod = DEPMOD $(MODLIB) |
3e3005df MY |
1942 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
1943 | $(KERNELRELEASE) | |
1944 | ||
1945 | modules_install: | |
1946 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1947 | $(call cmd,depmod) | |
1948 | ||
1949 | else # CONFIG_MODULES | |
1950 | ||
1951 | # Modules not configured | |
1952 | # --------------------------------------------------------------------------- | |
1953 | ||
8ae071fc MY |
1954 | PHONY += __external_modules_error |
1955 | ||
1956 | modules modules_install: __external_modules_error | |
1957 | @: | |
3e3005df | 1958 | |
f110e5a2 MY |
1959 | KBUILD_MODULES := |
1960 | ||
3e3005df MY |
1961 | endif # CONFIG_MODULES |
1962 | ||
f73edc89 MY |
1963 | PHONY += modpost |
1964 | modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ | |
1965 | $(if $(KBUILD_MODULES), modules_check) | |
1966 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1967 | ||
b1fbfcb4 MY |
1968 | # Single targets |
1969 | # --------------------------------------------------------------------------- | |
1970 | # To build individual files in subdirectories, you can do like this: | |
1971 | # | |
1972 | # make foo/bar/baz.s | |
1973 | # | |
1974 | # The supported suffixes for single-target are listed in 'single-targets' | |
1975 | # | |
1976 | # To build only under specific subdirectories, you can do like this: | |
1977 | # | |
1978 | # make foo/bar/baz/ | |
1979 | ||
1980 | ifdef single-build | |
1981 | ||
1982 | # .ko is special because modpost is needed | |
1983 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
fc93a4cd MY |
1984 | single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ |
1985 | $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) | |
b1fbfcb4 | 1986 | |
f73edc89 | 1987 | $(single-ko): single_modules |
b1fbfcb4 | 1988 | @: |
5750121a | 1989 | $(single-no-ko): $(build-dir) |
b1fbfcb4 MY |
1990 | @: |
1991 | ||
f110e5a2 | 1992 | # Remove MODORDER when done because it is not the real one. |
f73edc89 MY |
1993 | PHONY += single_modules |
1994 | single_modules: $(single-no-ko) modules_prepare | |
a53da43d | 1995 | $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) |
b1fbfcb4 | 1996 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
f73edc89 MY |
1997 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) |
1998 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
b1fbfcb4 | 1999 | endif |
f110e5a2 | 2000 | $(Q)rm -f $(MODORDER) |
b1fbfcb4 | 2001 | |
5750121a | 2002 | single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) |
b1fbfcb4 | 2003 | |
3753af77 MY |
2004 | KBUILD_MODULES := 1 |
2005 | ||
b480fec9 MY |
2006 | endif |
2007 | ||
c99f3918 MY |
2008 | # Preset locale variables to speed up the build process. Limit locale |
2009 | # tweaks to this spot to avoid wrong language settings when running | |
2010 | # make menuconfig etc. | |
2011 | # Error messages still appears in the original language | |
5750121a MY |
2012 | PHONY += $(build-dir) |
2013 | $(build-dir): prepare | |
2014 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) | |
c99f3918 | 2015 | |
76cd306d MY |
2016 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) |
2017 | PHONY += $(clean-dirs) clean | |
2018 | $(clean-dirs): | |
2019 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
2020 | ||
88d7be03 | 2021 | clean: $(clean-dirs) |
88d7be03 | 2022 | $(call cmd,rmfiles) |
5c816641 | 2023 | @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
2f7ab126 | 2024 | \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 | 2025 | -o -name '*.ko.*' \ |
dcad240c AD |
2026 | -o -name '*.dtb' -o -name '*.dtbo' \ |
2027 | -o -name '*.dtb.S' -o -name '*.dtbo.S' \ | |
2028 | -o -name '*.dt.yaml' \ | |
ef46d9b3 | 2029 | -o -name '*.dwo' -o -name '*.lst' \ |
5e9e95cc | 2030 | -o -name '*.su' -o -name '*.mod' \ |
88d7be03 | 2031 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 2032 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 2033 | -o -name '*.asn1.[ch]' \ |
88d7be03 | 2034 | -o -name '*.symtypes' -o -name 'modules.order' \ |
6b90bd4b | 2035 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 2036 | -o -name '*.ll' \ |
38e89184 | 2037 | -o -name '*.gcno' \ |
9c73bcfa TW |
2038 | -o -name '*.*.symversions' \) -type f -print \ |
2039 | -o -name '.tmp_*' -print \ | |
2040 | | xargs rm -rf | |
88d7be03 | 2041 | |
1da177e4 LT |
2042 | # Generate tags for editors |
2043 | # --------------------------------------------------------------------------- | |
a680eedc | 2044 | quiet_cmd_tags = GEN $@ |
858805b3 | 2045 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
1da177e4 | 2046 | |
f4ed1009 | 2047 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
2048 | $(call cmd,tags) |
2049 | ||
eb8305ae MM |
2050 | # Script to generate missing namespace dependencies |
2051 | # --------------------------------------------------------------------------- | |
2052 | ||
2053 | PHONY += nsdeps | |
bff9c62b | 2054 | nsdeps: export KBUILD_NSDEPS=1 |
eb8305ae | 2055 | nsdeps: modules |
bff9c62b | 2056 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps |
eb8305ae | 2057 | |
3d32285f MY |
2058 | # Clang Tooling |
2059 | # --------------------------------------------------------------------------- | |
2060 | ||
2061 | quiet_cmd_gen_compile_commands = GEN $@ | |
2062 | cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) | |
2063 | ||
7f69180b | 2064 | $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ |
32164845 | 2065 | $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ |
3d32285f MY |
2066 | $(if $(CONFIG_MODULES), $(MODORDER)) FORCE |
2067 | $(call if_changed,gen_compile_commands) | |
2068 | ||
7f69180b | 2069 | targets += $(extmod_prefix)compile_commands.json |
3d32285f | 2070 | |
6ad7cbc0 NH |
2071 | PHONY += clang-tidy clang-analyzer |
2072 | ||
2073 | ifdef CONFIG_CC_IS_CLANG | |
2074 | quiet_cmd_clang_tools = CHECK $< | |
2075 | cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< | |
2076 | ||
7f69180b | 2077 | clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json |
6ad7cbc0 NH |
2078 | $(call cmd,clang_tools) |
2079 | else | |
2080 | clang-tidy clang-analyzer: | |
2081 | @echo "$@ requires CC=clang" >&2 | |
2082 | @false | |
2083 | endif | |
2084 | ||
1da177e4 LT |
2085 | # Scripts to check various things for consistency |
2086 | # --------------------------------------------------------------------------- | |
2087 | ||
7dfbea4c | 2088 | PHONY += includecheck versioncheck coccicheck export_report |
279f3dd3 | 2089 | |
1da177e4 | 2090 | includecheck: |
436f876c | 2091 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 2092 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 2093 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
2094 | |
2095 | versioncheck: | |
2ee2d292 | 2096 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 2097 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 2098 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 2099 | |
74425eee | 2100 | coccicheck: |
858805b3 | 2101 | $(Q)$(BASH) $(srctree)/scripts/$@ |
74425eee | 2102 | |
295ac051 AB |
2103 | export_report: |
2104 | $(PERL) $(srctree)/scripts/export_report.pl | |
2105 | ||
c398ff00 | 2106 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 2107 | |
011e3a9a JD |
2108 | # UML needs a little special treatment here. It wants to use the host |
2109 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
2110 | # else wants $(ARCH), including people doing cross-builds, which means | |
2111 | # that $(SUBARCH) doesn't work here. | |
2112 | ifeq ($(ARCH), um) | |
2113 | CHECKSTACK_ARCH := $(SUBARCH) | |
2114 | else | |
2115 | CHECKSTACK_ARCH := $(ARCH) | |
2116 | endif | |
1da177e4 LT |
2117 | checkstack: |
2118 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
75dd4747 | 2119 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 2120 | |
7b8ea53d | 2121 | kernelrelease: |
1cb86b6c | 2122 | @$(filechk_kernel.release) |
01ab1788 | 2123 | |
cb58455c | 2124 | kernelversion: |
2244cbd8 | 2125 | @echo $(KERNELVERSION) |
1da177e4 | 2126 | |
c398ff00 MM |
2127 | image_name: |
2128 | @echo $(KBUILD_IMAGE) | |
2129 | ||
1da177e4 | 2130 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
0663c68c | 2131 | cmd_rmfiles = rm -rf $(rm-files) |
1da177e4 | 2132 | |
392885ee MY |
2133 | # read saved command lines for existing targets |
2134 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 2135 | |
b999923c | 2136 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1da177e4 | 2137 | |
46b7c492 | 2138 | endif # config-build |
2042b548 MY |
2139 | endif # mixed-build |
2140 | endif # need-sub-make | |
1da177e4 | 2141 | |
4f193362 | 2142 | PHONY += FORCE |
1da177e4 | 2143 | FORCE: |
4f193362 | 2144 | |
bd412d81 | 2145 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 2146 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 2147 | .PHONY: $(PHONY) |