Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
568035b0 | 2 | VERSION = 6 |
1b929c02 | 3 | PATCHLEVEL = 2 |
55922c9d | 4 | SUBLEVEL = 0 |
2241ab53 | 5 | EXTRAVERSION = -rc5 |
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 | $(error targets prefixed with '__' are only for internal use)) | |
20 | ||
ba634ece | 21 | # That's our default target when none is given on the command line |
121c2a13 MY |
22 | PHONY := __all |
23 | __all: | |
ba634ece | 24 | |
1da177e4 LT |
25 | # We are using a recursive build, so we need to do a little thinking |
26 | # to get the ordering right. | |
27 | # | |
28 | # Most importantly: sub-Makefiles should only ever modify files in | |
29 | # their own directory. If in some directory we have a dependency on | |
30 | # a file in another dir (which doesn't happen often, but it's often | |
f49821ee | 31 | # unavoidable when linking the built-in.a targets which finally |
1da177e4 LT |
32 | # turn into vmlinux), we will call a sub make in that other dir, and |
33 | # after that we are sure that everything which is in that other dir | |
34 | # is now up to date. | |
35 | # | |
36 | # The only cases where we need to modify files which have global | |
37 | # effects are thus separated out and done before the recursive | |
38 | # descending is started. They are now explicitly listed as the | |
39 | # prepare rule. | |
40 | ||
221cc2d2 | 41 | ifneq ($(sub_make_done),1) |
3812b8c5 MY |
42 | |
43 | # Do not use make's built-in rules and variables | |
44 | # (this increases performance and avoids hard-to-debug behaviour) | |
45 | MAKEFLAGS += -rR | |
46 | ||
47 | # Avoid funny character set dependencies | |
48 | unexport LC_ALL | |
49 | LC_COLLATE=C | |
50 | LC_NUMERIC=C | |
51 | export LC_COLLATE LC_NUMERIC | |
52 | ||
53 | # Avoid interference with shell env settings | |
54 | unexport GREP_OPTIONS | |
55 | ||
066b7ed9 MM |
56 | # Beautify output |
57 | # --------------------------------------------------------------------------- | |
58 | # | |
8962b6b4 MY |
59 | # Most of build commands in Kbuild start with "cmd_". You can optionally define |
60 | # "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from | |
61 | # that command is printed by default. | |
066b7ed9 | 62 | # |
8962b6b4 MY |
63 | # e.g.) |
64 | # quiet_cmd_depmod = DEPMOD $(MODLIB) | |
65 | # cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE) | |
066b7ed9 MM |
66 | # |
67 | # A simple variant is to prefix commands with $(Q) - that's useful | |
68 | # for commands that shall be hidden in non-verbose mode. | |
69 | # | |
8962b6b4 | 70 | # $(Q)$(MAKE) $(build)=scripts/basic |
066b7ed9 | 71 | # |
6ae4b986 MY |
72 | # If KBUILD_VERBOSE contains 1, the whole command is echoed. |
73 | # If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed. | |
066b7ed9 | 74 | # |
1da177e4 LT |
75 | # To put more focus on warnings, be less verbose as default |
76 | # Use 'make V=1' to see the full commands | |
77 | ||
b8b0618c CR |
78 | ifeq ("$(origin V)", "command line") |
79 | KBUILD_VERBOSE = $(V) | |
1da177e4 | 80 | endif |
1da177e4 | 81 | |
6ae4b986 MY |
82 | quiet = quiet_ |
83 | Q = @ | |
84 | ||
85 | ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) | |
066b7ed9 MM |
86 | quiet = |
87 | Q = | |
066b7ed9 MM |
88 | endif |
89 | ||
90 | # If the user is running make -s (silent mode), suppress echoing of | |
91 | # commands | |
4bf73588 | 92 | # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS. |
066b7ed9 | 93 | |
4bf73588 | 94 | ifeq ($(filter 3.%,$(MAKE_VERSION)),) |
fc5d57a9 | 95 | short-opts := $(firstword -$(MAKEFLAGS)) |
4bf73588 | 96 | else |
fc5d57a9 | 97 | short-opts := $(filter-out --%,$(MAKEFLAGS)) |
4bf73588 DG |
98 | endif |
99 | ||
fc5d57a9 | 100 | ifneq ($(findstring s,$(short-opts)),) |
4bf73588 | 101 | quiet=silent_ |
83d98d73 | 102 | override KBUILD_VERBOSE := |
066b7ed9 | 103 | endif |
066b7ed9 MM |
104 | |
105 | export quiet Q KBUILD_VERBOSE | |
106 | ||
bcf637f5 MY |
107 | # Call a source code checker (by default, "sparse") as part of the |
108 | # C compilation. | |
109 | # | |
110 | # Use 'make C=1' to enable checking of only re-compiled files. | |
111 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
112 | # of whether they are re-compiled or not. | |
113 | # | |
114 | # See the file "Documentation/dev-tools/sparse.rst" for more details, | |
115 | # including where to get the "sparse" utility. | |
116 | ||
117 | ifeq ("$(origin C)", "command line") | |
118 | KBUILD_CHECKSRC = $(C) | |
119 | endif | |
120 | ifndef KBUILD_CHECKSRC | |
121 | KBUILD_CHECKSRC = 0 | |
122 | endif | |
123 | ||
124 | export KBUILD_CHECKSRC | |
125 | ||
2f7ab126 MO |
126 | # Enable "clippy" (a linter) as part of the Rust compilation. |
127 | # | |
128 | # Use 'make CLIPPY=1' to enable it. | |
129 | ifeq ("$(origin CLIPPY)", "command line") | |
130 | KBUILD_CLIPPY := $(CLIPPY) | |
131 | endif | |
132 | ||
133 | export KBUILD_CLIPPY | |
134 | ||
bcf637f5 MY |
135 | # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the |
136 | # directory of external module to build. Setting M= takes precedence. | |
137 | ifeq ("$(origin M)", "command line") | |
138 | KBUILD_EXTMOD := $(M) | |
139 | endif | |
140 | ||
141 | $(if $(word 2, $(KBUILD_EXTMOD)), \ | |
142 | $(error building multiple external modules is not supported)) | |
143 | ||
9a68fd7f MY |
144 | $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \ |
145 | $(error module directory path cannot contain '$x'))) | |
146 | ||
74ee585b MY |
147 | # Remove trailing slashes |
148 | ifneq ($(filter %/, $(KBUILD_EXTMOD)),) | |
149 | KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) | |
150 | endif | |
151 | ||
bcf637f5 MY |
152 | export KBUILD_EXTMOD |
153 | ||
25b146c5 MY |
154 | # Kbuild will save output files in the current working directory. |
155 | # This does not need to match to the root of the kernel source tree. | |
156 | # | |
157 | # For example, you can do this: | |
158 | # | |
159 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
160 | # | |
161 | # If you want to save output files in a different location, there are | |
162 | # two syntaxes to specify it. | |
163 | # | |
1da177e4 LT |
164 | # 1) O= |
165 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 166 | # |
1da177e4 | 167 | # 2) Set KBUILD_OUTPUT |
25b146c5 MY |
168 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
169 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
1da177e4 LT |
170 | # |
171 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
172 | # variable. | |
173 | ||
25b146c5 | 174 | # Do we want to change the working directory? |
b8b0618c CR |
175 | ifeq ("$(origin O)", "command line") |
176 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
177 | endif |
178 | ||
25b146c5 MY |
179 | ifneq ($(KBUILD_OUTPUT),) |
180 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
181 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
182 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
183 | $(if $(abs_objtree),, \ | |
184 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
185 | ||
186 | # $(realpath ...) resolves symlinks | |
187 | abs_objtree := $(realpath $(abs_objtree)) | |
188 | else | |
189 | abs_objtree := $(CURDIR) | |
190 | endif # ifneq ($(KBUILD_OUTPUT),) | |
191 | ||
192 | ifeq ($(abs_objtree),$(CURDIR)) | |
193 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
194 | MAKEFLAGS += --no-print-directory | |
195 | else | |
196 | need-sub-make := 1 | |
51193b76 RJ |
197 | endif |
198 | ||
30cef68d MY |
199 | this-makefile := $(lastword $(MAKEFILE_LIST)) |
200 | abs_srctree := $(realpath $(dir $(this-makefile))) | |
1da177e4 | 201 | |
25b146c5 MY |
202 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
203 | $(error source directory cannot contain spaces or colons) | |
204 | endif | |
1da177e4 | 205 | |
25b146c5 | 206 | ifneq ($(abs_srctree),$(abs_objtree)) |
80463f1b MY |
207 | # Look for make include files relative to root of kernel src |
208 | # | |
d8285639 MY |
209 | # --included-dir is added for backward compatibility, but you should not rely on |
210 | # it. Please add $(srctree)/ prefix to include Makefiles in the source tree. | |
25b146c5 | 211 | MAKEFLAGS += --include-dir=$(abs_srctree) |
25b146c5 | 212 | endif |
3812b8c5 | 213 | |
688931a5 MY |
214 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
215 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
216 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
217 | need-sub-make := 1 | |
218 | # Cancel implicit rules for this Makefile. | |
93fdddfe | 219 | $(this-makefile): ; |
688931a5 MY |
220 | endif |
221 | ||
25b146c5 | 222 | export abs_srctree abs_objtree |
221cc2d2 MY |
223 | export sub_make_done := 1 |
224 | ||
688931a5 MY |
225 | ifeq ($(need-sub-make),1) |
226 | ||
121c2a13 | 227 | PHONY += $(MAKECMDGOALS) __sub-make |
0b35786d | 228 | |
121c2a13 | 229 | $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make |
16f89098 | 230 | @: |
0b35786d | 231 | |
c4e6fff1 | 232 | # Invoke a second make in the output directory, passing relevant variables |
121c2a13 | 233 | __sub-make: |
25b146c5 | 234 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
1da177e4 | 235 | |
688931a5 | 236 | endif # need-sub-make |
221cc2d2 | 237 | endif # sub_make_done |
688931a5 | 238 | |
1da177e4 | 239 | # We process the rest of the Makefile if this is the final invocation of make |
688931a5 | 240 | ifeq ($(need-sub-make),) |
1da177e4 | 241 | |
7ff52571 MY |
242 | # Do not print "Entering directory ...", |
243 | # but we want to display it when entering to the output directory | |
244 | # so that IDEs/editors are able to understand relative filenames. | |
245 | MAKEFLAGS += --no-print-directory | |
246 | ||
25b146c5 | 247 | ifeq ($(abs_srctree),$(abs_objtree)) |
9da0763b MM |
248 | # building in the source tree |
249 | srctree := . | |
051f278e | 250 | building_out_of_srctree := |
9da0763b | 251 | else |
25b146c5 | 252 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
9da0763b MM |
253 | # building in a subdirectory of the source tree |
254 | srctree := .. | |
255 | else | |
25b146c5 | 256 | srctree := $(abs_srctree) |
9da0763b | 257 | endif |
051f278e | 258 | building_out_of_srctree := 1 |
9da0763b | 259 | endif |
2c1f4f12 | 260 | |
95fd3f87 MY |
261 | ifneq ($(KBUILD_ABS_SRCTREE),) |
262 | srctree := $(abs_srctree) | |
263 | endif | |
2c1f4f12 | 264 | |
7e1c0477 | 265 | objtree := . |
6b12de69 | 266 | VPATH := $(srctree) |
1da177e4 | 267 | |
051f278e | 268 | export building_out_of_srctree srctree objtree VPATH |
1da177e4 | 269 | |
2c1f4f12 MY |
270 | # To make sure we do not include .config for any of the *config targets |
271 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
272 | # It is allowed to specify more targets when calling make, including | |
273 | # mixing *config targets and build targets. | |
274 | # For example 'make oldconfig all'. | |
275 | # Detect when mixed targets is specified, and make a second invocation | |
276 | # of make so .config is not included in this case either (for *config). | |
277 | ||
278 | version_h := include/generated/uapi/linux/version.h | |
2c1f4f12 | 279 | |
22340a06 MY |
280 | clean-targets := %clean mrproper cleandocs |
281 | no-dot-config-targets := $(clean-targets) \ | |
2c1f4f12 | 282 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
59b2bd05 | 283 | $(version_h) headers headers_% archheaders archscripts \ |
4623980d | 284 | %asm-generic kernelversion %src-pkg dt_binding_check \ |
2f7ab126 | 285 | outputmakefile rustavailable rustfmt rustfmtcheck |
805b2e1d MY |
286 | # Installation targets should not require compiler. Unfortunately, vdso_install |
287 | # is an exception where build artifacts may be updated. This must be fixed. | |
288 | no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ | |
289 | headers_install modules_install kernelrelease image_name | |
993bdde9 MY |
290 | no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ |
291 | image_name | |
aa4847db | 292 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ |
2c1f4f12 | 293 | |
2042b548 MY |
294 | config-build := |
295 | mixed-build := | |
296 | need-config := 1 | |
805b2e1d | 297 | need-compiler := 1 |
2042b548 | 298 | may-sync-config := 1 |
394053f4 | 299 | single-build := |
2c1f4f12 MY |
300 | |
301 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
302 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 303 | need-config := |
2c1f4f12 MY |
304 | endif |
305 | endif | |
306 | ||
805b2e1d MY |
307 | ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) |
308 | ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) | |
309 | need-compiler := | |
310 | endif | |
311 | endif | |
312 | ||
d7942413 MY |
313 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
314 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
2042b548 | 315 | may-sync-config := |
d7942413 MY |
316 | endif |
317 | endif | |
318 | ||
319 | ifneq ($(KBUILD_EXTMOD),) | |
2042b548 | 320 | may-sync-config := |
d7942413 MY |
321 | endif |
322 | ||
2c1f4f12 | 323 | ifeq ($(KBUILD_EXTMOD),) |
efbf9726 | 324 | ifneq ($(filter %config,$(MAKECMDGOALS)),) |
2042b548 | 325 | config-build := 1 |
2c1f4f12 | 326 | ifneq ($(words $(MAKECMDGOALS)),1) |
2042b548 | 327 | mixed-build := 1 |
2c1f4f12 MY |
328 | endif |
329 | endif | |
330 | endif | |
22340a06 | 331 | |
394053f4 MY |
332 | # We cannot build single targets and the others at the same time |
333 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
334 | single-build := 1 | |
335 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
336 | mixed-build := 1 | |
337 | endif | |
338 | endif | |
339 | ||
22340a06 MY |
340 | # For "make -j clean all", "make -j mrproper defconfig all", etc. |
341 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
342 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
2042b548 | 343 | mixed-build := 1 |
22340a06 MY |
344 | endif |
345 | endif | |
346 | ||
2c1f4f12 MY |
347 | # install and modules_install need also be processed one by one |
348 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
349 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
2042b548 | 350 | mixed-build := 1 |
2c1f4f12 MY |
351 | endif |
352 | endif | |
353 | ||
2042b548 | 354 | ifdef mixed-build |
2c1f4f12 MY |
355 | # =========================================================================== |
356 | # We're called with mixed targets (*config and build targets). | |
357 | # Handle them one by one. | |
358 | ||
359 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
360 | ||
121c2a13 | 361 | $(MAKECMDGOALS): __build_one_by_one |
2c1f4f12 MY |
362 | @: |
363 | ||
364 | __build_one_by_one: | |
365 | $(Q)set -e; \ | |
366 | for i in $(MAKECMDGOALS); do \ | |
367 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
368 | done | |
369 | ||
2042b548 | 370 | else # !mixed-build |
2c1f4f12 | 371 | |
3204a7fb | 372 | include $(srctree)/scripts/Kbuild.include |
2c1f4f12 MY |
373 | |
374 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
6768fa4b | 375 | KERNELRELEASE = $(call read-file, include/config/kernel.release) |
2c1f4f12 MY |
376 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
377 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
378 | ||
3204a7fb | 379 | include $(srctree)/scripts/subarch.include |
1da177e4 LT |
380 | |
381 | # Cross compiling and selecting different set of gcc/bin-utils | |
382 | # --------------------------------------------------------------------------- | |
383 | # | |
384 | # When performing cross compilation for other architectures ARCH shall be set | |
385 | # to the target architecture. (See arch/* for the possibilities). | |
386 | # ARCH can be set during invocation of make: | |
387 | # make ARCH=ia64 | |
388 | # Another way is to have ARCH set in the environment. | |
389 | # The default ARCH is the host where make is executed. | |
390 | ||
391 | # CROSS_COMPILE specify the prefix used for all executables used | |
392 | # during compilation. Only gcc and related bin-utils executables | |
393 | # are prefixed with $(CROSS_COMPILE). | |
394 | # CROSS_COMPILE can be set on the command line | |
395 | # make CROSS_COMPILE=ia64-linux- | |
396 | # Alternatively CROSS_COMPILE can be set in the environment. | |
397 | # Default value for CROSS_COMPILE is not to prefix executables | |
398 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 399 | ARCH ?= $(SUBARCH) |
1da177e4 LT |
400 | |
401 | # Architecture as present in compile.h | |
6752ed90 TG |
402 | UTS_MACHINE := $(ARCH) |
403 | SRCARCH := $(ARCH) | |
1da177e4 | 404 | |
d746d647 SR |
405 | # Additional ARCH settings for x86 |
406 | ifeq ($(ARCH),i386) | |
407 | SRCARCH := x86 | |
408 | endif | |
409 | ifeq ($(ARCH),x86_64) | |
410 | SRCARCH := x86 | |
411 | endif | |
74b469f2 | 412 | |
5e538790 | 413 | # Additional ARCH settings for sparc |
e69f58c0 NK |
414 | ifeq ($(ARCH),sparc32) |
415 | SRCARCH := sparc | |
416 | endif | |
a439fe51 | 417 | ifeq ($(ARCH),sparc64) |
5e538790 | 418 | SRCARCH := sparc |
a439fe51 | 419 | endif |
2fb9b1bd | 420 | |
5f6e0fe0 MY |
421 | # Additional ARCH settings for parisc |
422 | ifeq ($(ARCH),parisc64) | |
423 | SRCARCH := parisc | |
424 | endif | |
425 | ||
f02aa48d MY |
426 | export cross_compiling := |
427 | ifneq ($(SRCARCH),$(SUBARCH)) | |
428 | cross_compiling := 1 | |
429 | endif | |
430 | ||
14cdd3c4 | 431 | KCONFIG_CONFIG ?= .config |
41263fc6 | 432 | export KCONFIG_CONFIG |
14cdd3c4 | 433 | |
1da177e4 | 434 | # SHELL used by kbuild |
858805b3 | 435 | CONFIG_SHELL := sh |
1da177e4 | 436 | |
6d79a7b4 MY |
437 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
438 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
439 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
d7f14c66 | 440 | |
a0d1c951 | 441 | ifneq ($(LLVM),) |
e9c28192 NC |
442 | ifneq ($(filter %/,$(LLVM)),) |
443 | LLVM_PREFIX := $(LLVM) | |
444 | else ifneq ($(filter -%,$(LLVM)),) | |
445 | LLVM_SUFFIX := $(LLVM) | |
446 | endif | |
447 | ||
448 | HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) | |
449 | HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) | |
a0d1c951 MY |
450 | else |
451 | HOSTCC = gcc | |
452 | HOSTCXX = g++ | |
453 | endif | |
2f7ab126 | 454 | HOSTRUSTC = rustc |
d5ea4fec | 455 | HOSTPKG_CONFIG = pkg-config |
7f3a59db | 456 | |
f67695c9 | 457 | KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ |
b8321ed4 LT |
458 | -O2 -fomit-frame-pointer -std=gnu11 \ |
459 | -Wdeclaration-after-statement | |
f67695c9 EB |
460 | KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) |
461 | KBUILD_USERLDFLAGS := $(USERLDFLAGS) | |
7f3a59db | 462 | |
2f7ab126 MO |
463 | # These flags apply to all Rust code in the tree, including the kernel and |
464 | # host programs. | |
465 | export rust_common_flags := --edition=2021 \ | |
466 | -Zbinary_dep_depinfo=y \ | |
467 | -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \ | |
468 | -Dunreachable_pub -Dnon_ascii_idents \ | |
469 | -Wmissing_docs \ | |
470 | -Drustdoc::missing_crate_level_docs \ | |
471 | -Dclippy::correctness -Dclippy::style \ | |
472 | -Dclippy::suspicious -Dclippy::complexity \ | |
473 | -Dclippy::perf \ | |
474 | -Dclippy::let_unit_value -Dclippy::mut_mut \ | |
475 | -Dclippy::needless_bitwise_bool \ | |
476 | -Dclippy::needless_continue \ | |
477 | -Wclippy::dbg_macro | |
478 | ||
f67695c9 | 479 | KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) |
735aab1e | 480 | KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
2f7ab126 MO |
481 | KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ |
482 | -Zallow-features= $(HOSTRUSTFLAGS) | |
f92d19e0 LA |
483 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
484 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
1da177e4 | 485 | |
1da177e4 | 486 | # Make variables (CC, etc...) |
1da177e4 | 487 | CPP = $(CC) -E |
a0d1c951 | 488 | ifneq ($(LLVM),) |
e9c28192 NC |
489 | CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) |
490 | LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX) | |
491 | AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX) | |
492 | NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX) | |
493 | OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX) | |
494 | OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) | |
495 | READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) | |
496 | STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) | |
a0d1c951 MY |
497 | else |
498 | CC = $(CROSS_COMPILE)gcc | |
499 | LD = $(CROSS_COMPILE)ld | |
1da177e4 LT |
500 | AR = $(CROSS_COMPILE)ar |
501 | NM = $(CROSS_COMPILE)nm | |
1da177e4 LT |
502 | OBJCOPY = $(CROSS_COMPILE)objcopy |
503 | OBJDUMP = $(CROSS_COMPILE)objdump | |
eefb8c12 | 504 | READELF = $(CROSS_COMPILE)readelf |
a0d1c951 MY |
505 | STRIP = $(CROSS_COMPILE)strip |
506 | endif | |
2f7ab126 MO |
507 | RUSTC = rustc |
508 | RUSTDOC = rustdoc | |
509 | RUSTFMT = rustfmt | |
510 | CLIPPY_DRIVER = clippy-driver | |
511 | BINDGEN = bindgen | |
512 | CARGO = cargo | |
e83b9f55 | 513 | PAHOLE = pahole |
c9a0f3b8 | 514 | RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids |
73a4f6db MY |
515 | LEX = flex |
516 | YACC = bison | |
1da177e4 | 517 | AWK = awk |
caa27b66 | 518 | INSTALLKERNEL := installkernel |
436e980e | 519 | DEPMOD = depmod |
1da177e4 | 520 | PERL = perl |
e9781b52 | 521 | PYTHON3 = python3 |
1da177e4 | 522 | CHECK = sparse |
858805b3 | 523 | BASH = bash |
e4a42c82 DE |
524 | KGZIP = gzip |
525 | KBZIP2 = bzip2 | |
526 | KLZOP = lzop | |
8dfb61dc DE |
527 | LZMA = lzma |
528 | LZ4 = lz4c | |
529 | XZ = xz | |
48f7ddf7 | 530 | ZSTD = zstd |
8dfb61dc | 531 | |
9741e07e JO |
532 | PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) |
533 | ||
80a7d1d9 | 534 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
6c49f359 | 535 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
0c22be07 | 536 | NOSTDINC_FLAGS := |
6588169d | 537 | CFLAGS_MODULE = |
2f7ab126 | 538 | RUSTFLAGS_MODULE = |
6588169d SR |
539 | AFLAGS_MODULE = |
540 | LDFLAGS_MODULE = | |
1da177e4 | 541 | CFLAGS_KERNEL = |
2f7ab126 | 542 | RUSTFLAGS_KERNEL = |
1da177e4 | 543 | AFLAGS_KERNEL = |
8debed3e | 544 | LDFLAGS_vmlinux = |
1da177e4 | 545 | |
abbf1590 DH |
546 | # Use USERINCLUDE when you must reference the UAPI directories only. |
547 | USERINCLUDE := \ | |
9d022c54 MY |
548 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
549 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
abbf1590 | 550 | -I$(srctree)/include/uapi \ |
3308b285 | 551 | -I$(objtree)/include/generated/uapi \ |
ce6ed1c4 | 552 | -include $(srctree)/include/linux/compiler-version.h \ |
abbf1590 DH |
553 | -include $(srctree)/include/linux/kconfig.h |
554 | ||
1da177e4 LT |
555 | # Use LINUXINCLUDE when you must reference the include/ directory. |
556 | # Needed to be compatible with the O= option | |
abbf1590 | 557 | LINUXINCLUDE := \ |
9d022c54 MY |
558 | -I$(srctree)/arch/$(SRCARCH)/include \ |
559 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
051f278e | 560 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ |
f8224f7f MY |
561 | -I$(objtree)/include \ |
562 | $(USERINCLUDE) | |
1da177e4 | 563 | |
42a92bcc | 564 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
eeb5687a | 565 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
42a92bcc | 566 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
b89f25ea | 567 | -Werror=implicit-function-declaration -Werror=implicit-int \ |
3bc753c0 | 568 | -Werror=return-type -Wno-format-security -funsigned-char \ |
e8c07082 | 569 | -std=gnu11 |
433dc2eb | 570 | KBUILD_CPPFLAGS := -D__KERNEL__ |
2f7ab126 | 571 | KBUILD_RUSTFLAGS := $(rust_common_flags) \ |
c83b16ce | 572 | --target=$(objtree)/scripts/target.json \ |
2f7ab126 MO |
573 | -Cpanic=abort -Cembed-bitcode=n -Clto=n \ |
574 | -Cforce-unwind-tables=n -Ccodegen-units=1 \ | |
575 | -Csymbol-mangling-version=v0 \ | |
576 | -Crelocation-model=static \ | |
577 | -Zfunction-sections=n \ | |
578 | -Dclippy::float_arithmetic | |
579 | ||
80c00ba9 SR |
580 | KBUILD_AFLAGS_KERNEL := |
581 | KBUILD_CFLAGS_KERNEL := | |
2f7ab126 | 582 | KBUILD_RUSTFLAGS_KERNEL := |
6588169d SR |
583 | KBUILD_AFLAGS_MODULE := -DMODULE |
584 | KBUILD_CFLAGS_MODULE := -DMODULE | |
2f7ab126 | 585 | KBUILD_RUSTFLAGS_MODULE := --cfg MODULE |
10df0638 | 586 | KBUILD_LDFLAGS_MODULE := |
d503ac53 | 587 | KBUILD_LDFLAGS := |
5241ab4c | 588 | CLANG_FLAGS := |
1da177e4 | 589 | |
2f7ab126 MO |
590 | ifeq ($(KBUILD_CLIPPY),1) |
591 | RUSTC_OR_CLIPPY_QUIET := CLIPPY | |
592 | RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) | |
593 | else | |
594 | RUSTC_OR_CLIPPY_QUIET := RUSTC | |
595 | RUSTC_OR_CLIPPY = $(RUSTC) | |
596 | endif | |
597 | ||
598 | ifdef RUST_LIB_SRC | |
599 | export RUST_LIB_SRC | |
600 | endif | |
601 | ||
602 | # Allows the usage of unstable features in stable compilers. | |
603 | export RUSTC_BOOTSTRAP := 1 | |
604 | ||
d5ea4fec | 605 | export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG |
2f7ab126 MO |
606 | export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO |
607 | export HOSTRUSTC KBUILD_HOSTRUSTFLAGS | |
d9b5665f | 608 | export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL |
d8d2d382 | 609 | export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
48f7ddf7 | 610 | export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD |
7bac9870 | 611 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
f67695c9 | 612 | export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS |
1da177e4 | 613 | |
d503ac53 | 614 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
0e410e15 | 615 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
2f7ab126 | 616 | export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE |
222d394d | 617 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
2f7ab126 MO |
618 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
619 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL | |
9741e07e | 620 | export PAHOLE_FLAGS |
1da177e4 | 621 | |
1da177e4 LT |
622 | # Files to ignore in find ... statements |
623 | ||
ae63b2d7 PB |
624 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
625 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
626 | -prune -o | |
450c6076 JJ |
627 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
628 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
629 | |
630 | # =========================================================================== | |
631 | # Rules shared between *config targets and build targets | |
632 | ||
312a3d09 | 633 | # Basic helpers built in scripts/basic/ |
4f193362 | 634 | PHONY += scripts_basic |
1da177e4 LT |
635 | scripts_basic: |
636 | $(Q)$(MAKE) $(build)=scripts/basic | |
637 | ||
4f193362 | 638 | PHONY += outputmakefile |
2728fcfa | 639 | ifdef building_out_of_srctree |
e8e83a23 | 640 | # Before starting out-of-tree build, make sure the source tree is clean. |
fd5f0cd6 JB |
641 | # outputmakefile generates a Makefile in the output directory, if using a |
642 | # separate output directory. This allows convenient use of make in the | |
643 | # output directory. | |
3a51ff34 VK |
644 | # At the same time when output Makefile generated, generate .gitignore to |
645 | # ignore whole output directory | |
2728fcfa MY |
646 | |
647 | quiet_cmd_makefile = GEN Makefile | |
648 | cmd_makefile = { \ | |
649 | echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ | |
650 | echo "include $(srctree)/Makefile"; \ | |
651 | } > Makefile | |
652 | ||
1da177e4 | 653 | outputmakefile: |
4b098659 | 654 | @if [ -f $(srctree)/.config -o \ |
e8e83a23 MY |
655 | -d $(srctree)/include/config -o \ |
656 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
657 | echo >&2 "***"; \ | |
658 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
659 | echo >&2 "*** in $(abs_srctree)";\ | |
660 | echo >&2 "***"; \ | |
661 | false; \ | |
662 | fi | |
92979997 | 663 | $(Q)ln -fsn $(srctree) source |
2728fcfa | 664 | $(call cmd,makefile) |
156e7cbb MY |
665 | $(Q)test -e .gitignore || \ |
666 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
fd5f0cd6 | 667 | endif |
1da177e4 | 668 | |
db07562a ND |
669 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
670 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
671 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
672 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
6072b2c4 | 673 | CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1)) |
db07562a ND |
674 | |
675 | ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) | |
6f5b41a2 | 676 | include $(srctree)/scripts/Makefile.clang |
ae6b289a CF |
677 | endif |
678 | ||
57fd251c MY |
679 | # Include this also for config targets because some architectures need |
680 | # cc-cross-prefix to determine CROSS_COMPILE. | |
805b2e1d | 681 | ifdef need-compiler |
57fd251c | 682 | include $(srctree)/scripts/Makefile.compiler |
805b2e1d | 683 | endif |
57fd251c | 684 | |
2042b548 | 685 | ifdef config-build |
1da177e4 LT |
686 | # =========================================================================== |
687 | # *config targets only - make sure prerequisites are updated, and descend | |
688 | # in scripts/kconfig to make the *config target | |
689 | ||
690 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
691 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
692 | # used for 'make defconfig' | |
3204a7fb | 693 | include $(srctree)/arch/$(SRCARCH)/Makefile |
315bab4e | 694 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
1da177e4 | 695 | |
36de077b | 696 | config: outputmakefile scripts_basic FORCE |
31110ebb SR |
697 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
698 | ||
36de077b | 699 | %config: outputmakefile scripts_basic FORCE |
1da177e4 LT |
700 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
701 | ||
2042b548 | 702 | else #!config-build |
1da177e4 LT |
703 | # =========================================================================== |
704 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
705 | # targets and others. In general all targets except *config targets. | |
706 | ||
2c1f4f12 | 707 | # If building an external module we do not care about the all: rule |
121c2a13 | 708 | # but instead __all depend on modules |
2c1f4f12 MY |
709 | PHONY += all |
710 | ifeq ($(KBUILD_EXTMOD),) | |
121c2a13 | 711 | __all: all |
2c1f4f12 | 712 | else |
121c2a13 | 713 | __all: modules |
2c1f4f12 MY |
714 | endif |
715 | ||
32164845 MY |
716 | targets := |
717 | ||
2c1f4f12 MY |
718 | # Decide whether to build built-in, modular, or both. |
719 | # Normally, just do built-in. | |
720 | ||
721 | KBUILD_MODULES := | |
722 | KBUILD_BUILTIN := 1 | |
723 | ||
724 | # If we have only "make modules", don't compile built-in objects. | |
2c1f4f12 | 725 | ifeq ($(MAKECMDGOALS),modules) |
4b50c8c4 | 726 | KBUILD_BUILTIN := |
2c1f4f12 MY |
727 | endif |
728 | ||
729 | # If we have "make <whatever> modules", compile modules | |
730 | # in addition to whatever we do anyway. | |
731 | # Just "make" or "make all" shall build modules as well | |
732 | ||
6ad7cbc0 | 733 | ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) |
2c1f4f12 MY |
734 | KBUILD_MODULES := 1 |
735 | endif | |
736 | ||
737 | ifeq ($(MAKECMDGOALS),) | |
738 | KBUILD_MODULES := 1 | |
739 | endif | |
740 | ||
741 | export KBUILD_MODULES KBUILD_BUILTIN | |
742 | ||
2042b548 | 743 | ifdef need-config |
d93a18f2 MY |
744 | include include/config/auto.conf |
745 | endif | |
746 | ||
1da177e4 | 747 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 | 748 | # Objects we will link into vmlinux / subdirs we need to visit |
5750121a MY |
749 | core-y := |
750 | drivers-y := | |
1da177e4 | 751 | libs-y := lib/ |
1da177e4 LT |
752 | endif # KBUILD_EXTMOD |
753 | ||
315bab4e MY |
754 | # The all: target is the default when no target is given on the |
755 | # command line. | |
756 | # This allow a user to issue only 'make' to build a kernel including modules | |
757 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
758 | all: vmlinux | |
759 | ||
7d73c3e9 ND |
760 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage |
761 | ifdef CONFIG_CC_IS_GCC | |
762 | CFLAGS_GCOV += -fno-tree-loop-im | |
763 | endif | |
5aadfdeb | 764 | export CFLAGS_GCOV |
315bab4e | 765 | |
b1f4ff74 PZ |
766 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
767 | ifdef CONFIG_FUNCTION_TRACER | |
768 | CC_FLAGS_FTRACE := -pg | |
769 | endif | |
770 | ||
3204a7fb | 771 | include $(srctree)/arch/$(SRCARCH)/Makefile |
1da177e4 | 772 | |
2042b548 MY |
773 | ifdef need-config |
774 | ifdef may-sync-config | |
315bab4e MY |
775 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
776 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
777 | # because some architectures define CROSS_COMPILE there. | |
d2f8ae0e | 778 | include include/config/auto.conf.cmd |
1da177e4 | 779 | |
05850719 MY |
780 | $(KCONFIG_CONFIG): |
781 | @echo >&2 '***' | |
782 | @echo >&2 '*** Configuration file "$@" not found!' | |
783 | @echo >&2 '***' | |
784 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
785 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
786 | @echo >&2 '***' | |
787 | @/bin/false | |
1da177e4 | 788 | |
61277981 UM |
789 | # The actual configuration files used during the build are stored in |
790 | # include/generated/ and include/config/. Update them if .config is newer than | |
791 | # include/config/auto.conf (which mirrors .config). | |
9390dff6 MY |
792 | # |
793 | # This exploits the 'multi-target pattern rule' trick. | |
794 | # The syncconfig should be executed only once to make all the targets. | |
f463c351 | 795 | # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) |
d952cfaf MY |
796 | # |
797 | # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, | |
798 | # so you cannot notice that Kconfig is waiting for the user input. | |
2f7ab126 | 799 | %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG) |
d952cfaf MY |
800 | $(Q)$(kecho) " SYNC $@" |
801 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
2042b548 | 802 | else # !may-sync-config |
d7942413 MY |
803 | # External modules and some install targets need include/generated/autoconf.h |
804 | # and include/config/auto.conf but do not care if they are up-to-date. | |
805 | # Use auto.conf to trigger the test | |
9ee4e336 SR |
806 | PHONY += include/config/auto.conf |
807 | ||
808 | include/config/auto.conf: | |
4b098659 | 809 | @test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
810 | echo >&2; \ |
811 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
812 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
813 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
814 | echo >&2 ; \ | |
9ee4e336 SR |
815 | /bin/false) |
816 | ||
d7942413 | 817 | endif # may-sync-config |
2042b548 | 818 | endif # need-config |
1da177e4 | 819 | |
7d73c3e9 | 820 | KBUILD_CFLAGS += -fno-delete-null-pointer-checks |
ef6000b4 | 821 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
bd664f6b LT |
822 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
823 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
6f303d60 | 824 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
a1c48bb1 | 825 | |
15f5db60 MY |
826 | ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
827 | KBUILD_CFLAGS += -O2 | |
2f7ab126 | 828 | KBUILD_RUSTFLAGS += -Copt-level=2 |
15f5db60 MY |
829 | else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
830 | KBUILD_CFLAGS += -Os | |
2f7ab126 | 831 | KBUILD_RUSTFLAGS += -Copt-level=s |
815eb71e | 832 | endif |
1da177e4 | 833 | |
2f7ab126 MO |
834 | # Always set `debug-assertions` and `overflow-checks` because their default |
835 | # depends on `opt-level` and `debug-assertions`, respectively. | |
836 | KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) | |
837 | KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n) | |
838 | ||
69102311 | 839 | # Tell gcc to never replace conditional load with a non-conditional one |
7d73c3e9 ND |
840 | ifdef CONFIG_CC_IS_GCC |
841 | # gcc-10 renamed --param=allow-store-data-races=0 to | |
842 | # -fno-allow-store-data-races. | |
69102311 | 843 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) |
b1112139 | 844 | KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
7d73c3e9 | 845 | endif |
69102311 | 846 | |
1873e870 AK |
847 | ifdef CONFIG_READABLE_ASM |
848 | # Disable optimizations that make assembler listings hard to read. | |
849 | # reorder blocks reorders the control in the function | |
850 | # ipa clone creates specialized cloned functions | |
851 | # partial inlining inlines only parts of functions | |
7d73c3e9 | 852 | KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining |
1873e870 AK |
853 | endif |
854 | ||
08f67461 | 855 | ifneq ($(CONFIG_FRAME_WARN),0) |
a83e4ca2 | 856 | KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
35bb5b1e AK |
857 | endif |
858 | ||
893ab004 | 859 | stackp-flags-y := -fno-stack-protector |
050e9baa LT |
860 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
861 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
2a61f474 MY |
862 | |
863 | KBUILD_CFLAGS += $(stackp-flags-y) | |
e06b8b98 | 864 | |
efa80b02 MY |
865 | KBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror |
866 | KBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y) | |
f0be87c4 | 867 | KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds |
3fe617cc | 868 | |
2f7ab126 MO |
869 | KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings |
870 | KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) | |
871 | ||
076f421d | 872 | ifdef CONFIG_CC_IS_CLANG |
e8c07082 | 873 | # The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. |
a1494304 | 874 | KBUILD_CFLAGS += -Wno-gnu |
d936eb23 LT |
875 | else |
876 | ||
49832c81 RD |
877 | # gcc inanely warns about local variables called 'main' |
878 | KBUILD_CFLAGS += -Wno-main | |
cfe17c9b MY |
879 | endif |
880 | ||
885480b0 NC |
881 | # These warnings generated too much noise in a regular build. |
882 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
883 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) | |
0a5f4176 | 884 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
6272cc38 | 885 | |
49beadbd LT |
886 | # These result in bogus false positives |
887 | KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) | |
888 | ||
1da177e4 | 889 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 890 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
2f7ab126 | 891 | KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y |
1da177e4 | 892 | else |
7e9501fd RV |
893 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
894 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
895 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
896 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
897 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
2f7ab126 MO |
898 | # In the Rust target specification, "frame-pointer" is set explicitly |
899 | # to "may-omit". | |
7e9501fd | 900 | ifndef CONFIG_FUNCTION_TRACER |
a0f97e06 | 901 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 902 | endif |
7e9501fd | 903 | endif |
1da177e4 | 904 | |
f0fe00d4 | 905 | # Initialize all stack variables with a 0xAA pattern. |
906 | ifdef CONFIG_INIT_STACK_ALL_PATTERN | |
709a972e KC |
907 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern |
908 | endif | |
909 | ||
f0fe00d4 | 910 | # Initialize all stack variables with a zero value. |
911 | ifdef CONFIG_INIT_STACK_ALL_ZERO | |
f0fe00d4 | 912 | KBUILD_CFLAGS += -ftrivial-auto-var-init=zero |
607e57c6 KC |
913 | ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER |
914 | # https://github.com/llvm/llvm-project/issues/44842 | |
4e3feaad NC |
915 | CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang |
916 | export CC_AUTO_VAR_INIT_ZERO_ENABLER | |
917 | KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER) | |
f0fe00d4 | 918 | endif |
f02003c8 | 919 | endif |
f0fe00d4 | 920 | |
39218ff4 KC |
921 | # While VLAs have been removed, GCC produces unreachable stack probes |
922 | # for the randomize_kstack_offset feature. Disable it for all compilers. | |
923 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) | |
924 | ||
a82adfd5 KC |
925 | # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). |
926 | ifdef CONFIG_ZERO_CALL_USED_REGS | |
927 | KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr | |
928 | endif | |
929 | ||
606576ce | 930 | ifdef CONFIG_FUNCTION_TRACER |
3b15cdc1 ST |
931 | ifdef CONFIG_FTRACE_MCOUNT_USE_CC |
932 | CC_FLAGS_FTRACE += -mrecord-mcount | |
2f4df001 VG |
933 | ifdef CONFIG_HAVE_NOP_MCOUNT |
934 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
935 | CC_FLAGS_FTRACE += -mnop-mcount | |
936 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
937 | endif | |
938 | endif | |
07d04081 | 939 | endif |
22c8542d | 940 | ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL |
280981d6 SV |
941 | ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT |
942 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
943 | endif | |
22c8542d | 944 | endif |
3b15cdc1 ST |
945 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
946 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
947 | BUILD_C_RECORDMCOUNT := y | |
948 | export BUILD_C_RECORDMCOUNT | |
949 | endif | |
950 | endif | |
a2546fae | 951 | ifdef CONFIG_HAVE_FENTRY |
7d73c3e9 | 952 | # s390-linux-gnu-gcc did not support -mfentry until gcc-9. |
f28bc3c3 VG |
953 | ifeq ($(call cc-option-yn, -mfentry),y) |
954 | CC_FLAGS_FTRACE += -mfentry | |
955 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
956 | endif | |
a2546fae | 957 | endif |
f28bc3c3 VG |
958 | export CC_FLAGS_FTRACE |
959 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
960 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
16444a8a ACM |
961 | endif |
962 | ||
91341d4b SR |
963 | # We trigger additional mismatches with less inlining |
964 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
7d73c3e9 | 965 | KBUILD_CFLAGS += -fno-inline-functions-called-once |
91341d4b SR |
966 | endif |
967 | ||
2f7ab126 | 968 | # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0). |
90ad4052 | 969 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
e85d1d65 | 970 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
2f7ab126 | 971 | KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y |
e85d1d65 | 972 | LDFLAGS_vmlinux += --gc-sections |
90ad4052 MY |
973 | endif |
974 | ||
d08b9f0c | 975 | ifdef CONFIG_SHADOW_CALL_STACK |
9beccca0 | 976 | ifndef CONFIG_DYNAMIC_SCS |
d08b9f0c ST |
977 | CC_FLAGS_SCS := -fsanitize=shadow-call-stack |
978 | KBUILD_CFLAGS += $(CC_FLAGS_SCS) | |
9beccca0 | 979 | endif |
d08b9f0c ST |
980 | export CC_FLAGS_SCS |
981 | endif | |
982 | ||
dc5723b0 ST |
983 | ifdef CONFIG_LTO_CLANG |
984 | ifdef CONFIG_LTO_CLANG_THIN | |
2b868952 | 985 | CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit |
7f69180b | 986 | KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache |
dc5723b0 | 987 | else |
2b868952 | 988 | CC_FLAGS_LTO := -flto |
dc5723b0 ST |
989 | endif |
990 | CC_FLAGS_LTO += -fvisibility=hidden | |
22d429e7 ST |
991 | |
992 | # Limit inlining across translation units to reduce binary size | |
993 | KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 | |
24845dcb | 994 | |
0236526d TV |
995 | # Check for frame size exceeding threshold during prolog/epilog insertion |
996 | # when using lld < 13.0.0. | |
24845dcb | 997 | ifneq ($(CONFIG_FRAME_WARN),0) |
fccb3d3e | 998 | ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) |
24845dcb ND |
999 | KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) |
1000 | endif | |
dc5723b0 | 1001 | endif |
0236526d | 1002 | endif |
dc5723b0 ST |
1003 | |
1004 | ifdef CONFIG_LTO | |
5e95325f ST |
1005 | KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) |
1006 | KBUILD_AFLAGS += -fno-lto | |
dc5723b0 ST |
1007 | export CC_FLAGS_LTO |
1008 | endif | |
1009 | ||
cf68fffb | 1010 | ifdef CONFIG_CFI_CLANG |
89245600 | 1011 | CC_FLAGS_CFI := -fsanitize=kcfi |
cf68fffb ST |
1012 | KBUILD_CFLAGS += $(CC_FLAGS_CFI) |
1013 | export CC_FLAGS_CFI | |
1014 | endif | |
1015 | ||
d49a0626 PZ |
1016 | ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) |
1017 | KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT) | |
09c60546 FT |
1018 | endif |
1019 | ||
e8e69931 | 1020 | # arch Makefile may override CC so keep this after arch Makefile is included |
04e85bbf | 1021 | NOSTDINC_FLAGS += -nostdinc |
e8e69931 | 1022 | |
1da177e4 | 1023 | # warn about C99 declaration after statement |
a33e7ae2 | 1024 | KBUILD_CFLAGS += -Wdeclaration-after-statement |
1da177e4 | 1025 | |
0bb95f80 | 1026 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
8289f913 | 1027 | KBUILD_CFLAGS += -Wvla |
0bb95f80 | 1028 | |
070b98bf | 1029 | # disable pointer signed / unsigned warnings in gcc 4.0 |
fb073a4b | 1030 | KBUILD_CFLAGS += -Wno-pointer-sign |
1da177e4 | 1031 | |
552a23a0 GS |
1032 | # In order to make sure new function cast mismatches are not introduced |
1033 | # in the kernel (to avoid tripping CFI checking), the kernel should be | |
1034 | # globally built with -Wcast-function-type. | |
1035 | KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) | |
1036 | ||
217c3e01 SR |
1037 | # disable stringop warnings in gcc 8+ |
1038 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
1039 | ||
5c45de21 | 1040 | # We'll want to enable this eventually, but it's not going away for 5.7 at least |
5a76021c | 1041 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
5c45de21 | 1042 | |
adc71920 LT |
1043 | # Another good warning that we'll want to enable eventually |
1044 | KBUILD_CFLAGS += $(call cc-disable-warning, restrict) | |
1045 | ||
78a5255f | 1046 | # Enabled with W=2, disabled by default as noisy |
7d73c3e9 ND |
1047 | ifdef CONFIG_CC_IS_GCC |
1048 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
1049 | endif | |
78a5255f | 1050 | |
86cffecd KC |
1051 | # The allocators already balk at large sizes, so silence the compiler |
1052 | # warnings for bounds checks involving those possible values. While | |
1053 | # -Wno-alloc-size-larger-than would normally be used here, earlier versions | |
1054 | # of gcc (<9.1) weirdly don't handle the option correctly when _other_ | |
1055 | # warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX | |
1056 | # doesn't work (as it is documented to), silently resolving to "0" prior to | |
1057 | # version 9.1 (and producing an error more recently). Numeric values larger | |
1058 | # than PTRDIFF_MAX also don't work prior to version 9.1, which are silently | |
1059 | # ignored, continuing to default to PTRDIFF_MAX. So, left with no other | |
1060 | # choice, we must perform a versioned check to disable this warning. | |
1061 | # https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au | |
88b61e3b ND |
1062 | KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than |
1063 | KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) | |
86cffecd | 1064 | |
fe8d0a41 | 1065 | # disable invalid "can't wrap" optimizations for signed / pointers |
8b42cf2f | 1066 | KBUILD_CFLAGS += -fno-strict-overflow |
d0115552 | 1067 | |
3ce120b1 | 1068 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
7d4eb0d8 | 1069 | KBUILD_CFLAGS += -fno-stack-check |
3ce120b1 | 1070 | |
8f7f5c9f | 1071 | # conserve stack if available |
7d73c3e9 ND |
1072 | ifdef CONFIG_CC_IS_GCC |
1073 | KBUILD_CFLAGS += -fconserve-stack | |
1074 | endif | |
8f7f5c9f | 1075 | |
fe7c36c7 | 1076 | # Prohibit date/time macros, which would make the build non-deterministic |
87de84c9 | 1077 | KBUILD_CFLAGS += -Werror=date-time |
fe7c36c7 | 1078 | |
ea8daa7b DW |
1079 | # enforce correct pointer usage |
1080 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
1081 | ||
c834f0e8 KC |
1082 | # Require designated initializers for all marked structures |
1083 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
1084 | ||
a73619a8 | 1085 | # change __FILE__ to the relative path from the srctree |
a716bd74 | 1086 | KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
a73619a8 | 1087 | |
e0fe0bbe MY |
1088 | # include additional Makefiles when needed |
1089 | include-y := scripts/Makefile.extrawarn | |
6947fd96 | 1090 | include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug |
e0fe0bbe MY |
1091 | include-$(CONFIG_KASAN) += scripts/Makefile.kasan |
1092 | include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan | |
f80be457 | 1093 | include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan |
e0fe0bbe MY |
1094 | include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan |
1095 | include-$(CONFIG_KCOV) += scripts/Makefile.kcov | |
613f4b3e | 1096 | include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct |
e0fe0bbe MY |
1097 | include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins |
1098 | ||
1099 | include $(addprefix $(srctree)/, $(include-y)) | |
a86fe353 | 1100 | |
132305b3 MY |
1101 | # scripts/Makefile.gcc-plugins is intentionally included last. |
1102 | # Do not add $(call cc-option,...) below this line. When you build the kernel | |
1103 | # from the clean source tree, the GCC plugins do not exist at this point. | |
a86fe353 | 1104 | |
2f7ab126 | 1105 | # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments |
8cc7af75 MY |
1106 | KBUILD_CPPFLAGS += $(KCPPFLAGS) |
1107 | KBUILD_AFLAGS += $(KAFLAGS) | |
1108 | KBUILD_CFLAGS += $(KCFLAGS) | |
2f7ab126 | 1109 | KBUILD_RUSTFLAGS += $(KRUSTFLAGS) |
52bcc330 | 1110 | |
a9684337 BW |
1111 | KBUILD_LDFLAGS_MODULE += --build-id=sha1 |
1112 | LDFLAGS_vmlinux += --build-id=sha1 | |
18991197 | 1113 | |
0d362be5 ND |
1114 | KBUILD_LDFLAGS += -z noexecstack |
1115 | ifeq ($(CONFIG_LD_IS_BFD),y) | |
1116 | KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments) | |
1117 | endif | |
1118 | ||
5d7d18f5 | 1119 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
0f1fe9d6 | 1120 | LDFLAGS_vmlinux += -X |
5d7d18f5 DH |
1121 | endif |
1122 | ||
5cf896fb | 1123 | ifeq ($(CONFIG_RELR),y) |
27f2a4db | 1124 | LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags |
5cf896fb PC |
1125 | endif |
1126 | ||
59612b24 NC |
1127 | # We never want expected sections to be placed heuristically by the |
1128 | # linker. All sections should be explicitly named in the linker script. | |
1129 | ifdef CONFIG_LD_ORPHAN_WARN | |
e1789d7c | 1130 | LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) |
59612b24 NC |
1131 | endif |
1132 | ||
7f3a59db | 1133 | # Align the bit size of userspace programs with the kernel |
7f58b487 MY |
1134 | KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
1135 | KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) | |
7f3a59db | 1136 | |
80591e61 LVO |
1137 | # make the checker run with the right architecture |
1138 | CHECKFLAGS += --arch=$(ARCH) | |
1139 | ||
14516765 LVO |
1140 | # insure the checker run with the right endianness |
1141 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
1142 | ||
1f2f01b1 LVO |
1143 | # the checker needs the correct machine size |
1144 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
1145 | ||
1da177e4 | 1146 | # Default kernel image to build when no specific target is given. |
070b98bf | 1147 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
1148 | # set in the environment |
1149 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
1150 | # this default value | |
1151 | export KBUILD_IMAGE ?= vmlinux | |
1152 | ||
1153 | # | |
1154 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
1155 | # images. Default is /boot, but you can set it to other values | |
1156 | export INSTALL_PATH ?= /boot | |
1157 | ||
f4d4ffc0 JC |
1158 | # |
1159 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
1160 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
1161 | # an argument if needed. Otherwise it defaults to the kernel install path | |
1162 | # | |
1163 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
1164 | ||
1da177e4 LT |
1165 | # |
1166 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
1167 | # relocations required by build roots. This is not defined in the | |
070b98bf | 1168 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
1169 | # |
1170 | ||
df9df036 | 1171 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
1172 | export MODLIB |
1173 | ||
e00d8880 | 1174 | PHONY += prepare0 |
e2a666d5 | 1175 | |
ccae4cfa | 1176 | export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) |
7f69180b MY |
1177 | export MODORDER := $(extmod_prefix)modules.order |
1178 | export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps | |
47801c97 | 1179 | |
1da177e4 | 1180 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 | 1181 | |
5750121a MY |
1182 | build-dir := . |
1183 | clean-dirs := $(sort . Documentation \ | |
23febe37 | 1184 | $(patsubst %/,%,$(filter %/, $(core-) \ |
95fb6317 | 1185 | $(drivers-) $(libs-)))) |
1da177e4 | 1186 | |
5750121a MY |
1187 | export ARCH_CORE := $(core-y) |
1188 | export ARCH_LIB := $(filter %/, $(libs-y)) | |
1189 | export ARCH_DRIVERS := $(drivers-y) $(drivers-m) | |
f0d50ca0 | 1190 | # Externally visible symbols (used by link-vmlinux.sh) |
5750121a | 1191 | |
32164845 | 1192 | KBUILD_VMLINUX_OBJS := ./built-in.a |
7273ad2b | 1193 | ifdef CONFIG_MODULES |
f0d50ca0 MY |
1194 | KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) |
1195 | KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) | |
7273ad2b | 1196 | else |
f0d50ca0 | 1197 | KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) |
7273ad2b | 1198 | endif |
1da177e4 | 1199 | |
32164845 | 1200 | export KBUILD_VMLINUX_LIBS |
95698570 | 1201 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
1da177e4 | 1202 | |
3fdc7d3f MY |
1203 | # Recurse until adjust_autoksyms.sh is satisfied |
1204 | PHONY += autoksyms_recursive | |
2441e78b | 1205 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
1f50b80a MY |
1206 | # For the kernel to actually contain only the needed exported symbols, |
1207 | # we have to build modules as well to determine what those symbols are. | |
1208 | # (this can be evaluated only once include/config/auto.conf has been included) | |
fb2d99be MY |
1209 | KBUILD_MODULES := 1 |
1210 | ||
5750121a | 1211 | autoksyms_recursive: $(build-dir) modules.order |
fb2d99be | 1212 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
53632ba8 | 1213 | "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" |
1f50b80a MY |
1214 | endif |
1215 | ||
07a422bb MY |
1216 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
1217 | ||
88694cff QP |
1218 | quiet_cmd_autoksyms_h = GEN $@ |
1219 | cmd_autoksyms_h = mkdir -p $(dir $@); \ | |
1220 | $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ | |
1221 | ||
07a422bb | 1222 | $(autoksyms_h): |
88694cff | 1223 | $(call cmd,autoksyms_h) |
23121ca2 | 1224 | |
32164845 MY |
1225 | # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 |
1226 | quiet_cmd_ar_vmlinux.a = AR $@ | |
1227 | cmd_ar_vmlinux.a = \ | |
1228 | rm -f $@; \ | |
1229 | $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ | |
fb3041d6 | 1230 | $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt) |
fbe6e37d | 1231 | |
32164845 | 1232 | targets += vmlinux.a |
ce697cce | 1233 | vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE |
32164845 | 1234 | $(call if_changed,ar_vmlinux.a) |
2441e78b | 1235 | |
7a342e6c MY |
1236 | PHONY += vmlinux_o |
1237 | vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) | |
9c5a0ac3 | 1238 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o |
741f98fe | 1239 | |
7a342e6c MY |
1240 | vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o |
1241 | @: | |
1242 | ||
5d4aeffb | 1243 | PHONY += vmlinux |
8debed3e MY |
1244 | # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux, |
1245 | # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is | |
1246 | # unrelated; the decompressors just happen to have the same base name, | |
1247 | # arch/*/boot/compressed/vmlinux. | |
1248 | # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux. | |
1249 | # | |
1250 | # _LDFLAGS_vmlinux is a workaround for the 'private export' bug: | |
1251 | # https://savannah.gnu.org/bugs/?61463 | |
1252 | # For Make > 4.4, the following simple code will work: | |
1253 | # vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1254 | vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux) | |
1255 | vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux) | |
5d4aeffb MY |
1256 | vmlinux: vmlinux.o $(KBUILD_LDS) modpost |
1257 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux | |
392885ee | 1258 | |
38385f8f | 1259 | # The actual objects are generated when descending, |
1da177e4 | 1260 | # make sure no implicit rule kicks in |
9c5a0ac3 | 1261 | $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; |
1da177e4 | 1262 | |
1cb86b6c | 1263 | ifeq ($(origin KERNELRELEASE),file) |
ec31f868 | 1264 | filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree) |
1cb86b6c MY |
1265 | else |
1266 | filechk_kernel.release = echo $(KERNELRELEASE) | |
1267 | endif | |
0d0e7718 | 1268 | |
83a35e36 | 1269 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
24512795 | 1270 | include/config/kernel.release: FORCE |
0d0e7718 | 1271 | $(call filechk,kernel.release) |
cb58455c | 1272 | |
d8821622 MY |
1273 | # Additional helpers built in scripts/ |
1274 | # Carefully list dependencies so we do not try to build scripts twice | |
1275 | # in parallel | |
1276 | PHONY += scripts | |
60df1aee | 1277 | scripts: scripts_basic scripts_dtc |
d8821622 | 1278 | $(Q)$(MAKE) $(build)=$(@) |
cb58455c | 1279 | |
1da177e4 | 1280 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
1281 | # or the modules are listed in "prepare". |
1282 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1283 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1284 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 1285 | |
a5139fb3 | 1286 | PHONY += prepare archprepare |
5bb78269 | 1287 | |
36de077b | 1288 | archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
3044dd05 | 1289 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ |
a55f283e | 1290 | include/generated/compile.h include/generated/autoconf.h remove-stale-files |
5bb78269 | 1291 | |
65bba042 | 1292 | prepare0: archprepare |
60df1aee | 1293 | $(Q)$(MAKE) $(build)=scripts/mod |
ed7ceac1 | 1294 | $(Q)$(MAKE) $(build)=. prepare |
86feeaa8 | 1295 | |
1da177e4 | 1296 | # All the preparing.. |
0d989ac2 | 1297 | prepare: prepare0 |
2f7ab126 MO |
1298 | ifdef CONFIG_RUST |
1299 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v | |
1300 | $(Q)$(MAKE) $(build)=rust | |
1301 | endif | |
b9ab5ebb | 1302 | |
1476fee5 MY |
1303 | PHONY += remove-stale-files |
1304 | remove-stale-files: | |
1305 | $(Q)$(srctree)/scripts/remove-stale-files | |
1306 | ||
2c1f4f12 | 1307 | # Support for using generic headers in asm-generic |
7d0e5c20 MY |
1308 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
1309 | ||
2c1f4f12 MY |
1310 | PHONY += asm-generic uapi-asm-generic |
1311 | asm-generic: uapi-asm-generic | |
037fc336 MY |
1312 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
1313 | generic=include/asm-generic | |
2c1f4f12 | 1314 | uapi-asm-generic: |
037fc336 MY |
1315 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
1316 | generic=include/uapi/asm-generic | |
2c1f4f12 | 1317 | |
1da177e4 LT |
1318 | # Generate some files |
1319 | # --------------------------------------------------------------------------- | |
1320 | ||
1321 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1322 | # needs to be updated, so this check is forced on all builds | |
1323 | ||
1324 | uts_len := 64 | |
63104eec SR |
1325 | define filechk_utsrelease.h |
1326 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1327 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1328 | exit 1; \ | |
1329 | fi; \ | |
ad774086 | 1330 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
63104eec | 1331 | endef |
1da177e4 LT |
1332 | |
1333 | define filechk_version.h | |
9b82f13e SL |
1334 | if [ $(SUBLEVEL) -gt 255 ]; then \ |
1335 | echo \#define LINUX_VERSION_CODE $(shell \ | |
207da4c8 | 1336 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ |
9b82f13e SL |
1337 | else \ |
1338 | echo \#define LINUX_VERSION_CODE $(shell \ | |
207da4c8 | 1339 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ |
9b82f13e SL |
1340 | fi; \ |
1341 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ | |
88a68672 SL |
1342 | ((c) > 255 ? 255 : (c)))'; \ |
1343 | echo \#define LINUX_VERSION_MAJOR $(VERSION); \ | |
1344 | echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ | |
1345 | echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) | |
1da177e4 LT |
1346 | endef |
1347 | ||
5c816641 MY |
1348 | $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) |
1349 | $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) | |
43fee2b2 | 1350 | $(version_h): FORCE |
1da177e4 LT |
1351 | $(call filechk,version.h) |
1352 | ||
273b281f | 1353 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1354 | $(call filechk,utsrelease.h) |
1355 | ||
a55f283e MY |
1356 | filechk_compile.h = $(srctree)/scripts/mkcompile_h \ |
1357 | "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)" | |
1358 | ||
1359 | include/generated/compile.h: FORCE | |
1360 | $(call filechk,compile.h) | |
1361 | ||
179efcb4 VN |
1362 | PHONY += headerdep |
1363 | headerdep: | |
9663d989 PF |
1364 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1365 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1366 | |
8d730cfb DW |
1367 | # --------------------------------------------------------------------------- |
1368 | # Kernel headers | |
8d730cfb | 1369 | |
e6883b18 SR |
1370 | #Default location for installed headers |
1371 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1372 | |
59b2bd05 MY |
1373 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
1374 | cmd_headers_install = \ | |
1375 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1376 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1377 | usr/include $(INSTALL_HDR_PATH) | |
e6883b18 | 1378 | |
8d730cfb | 1379 | PHONY += headers_install |
59b2bd05 MY |
1380 | headers_install: headers |
1381 | $(call cmd,headers_install) | |
6520fe55 | 1382 | |
59b2bd05 | 1383 | PHONY += archheaders archscripts |
e6883b18 | 1384 | |
a5bae54c | 1385 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
6d716275 | 1386 | |
59b2bd05 MY |
1387 | PHONY += headers |
1388 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
1b620d53 | 1389 | $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML)) |
d5470d14 MY |
1390 | $(Q)$(MAKE) $(hdr-inst)=include/uapi |
1391 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1f85712e | 1392 | |
e949f4c2 | 1393 | ifdef CONFIG_HEADERS_INSTALL |
59b2bd05 | 1394 | prepare: headers |
e949f4c2 | 1395 | endif |
68475359 | 1396 | |
bdd7714b MY |
1397 | PHONY += scripts_unifdef |
1398 | scripts_unifdef: scripts_basic | |
1399 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1400 | ||
14ccc638 MY |
1401 | # --------------------------------------------------------------------------- |
1402 | # Install | |
1403 | ||
1404 | # Many distributions have the custom install script, /sbin/installkernel. | |
75ef3122 RD |
1405 | # If DKMS is installed, 'make install' will eventually recurse back |
1406 | # to this Makefile to build and install external modules. | |
14ccc638 MY |
1407 | # Cancel sub_make_done so that options such as M=, V=, etc. are parsed. |
1408 | ||
f774f5bb MY |
1409 | quiet_cmd_install = INSTALL $(INSTALL_PATH) |
1410 | cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh | |
14ccc638 | 1411 | |
1bb0b18a MY |
1412 | # --------------------------------------------------------------------------- |
1413 | # Tools | |
1414 | ||
03f16cd0 | 1415 | ifdef CONFIG_OBJTOOL |
0d989ac2 MY |
1416 | prepare: tools/objtool |
1417 | endif | |
1418 | ||
1419 | ifdef CONFIG_BPF | |
1420 | ifdef CONFIG_DEBUG_INFO_BTF | |
1421 | prepare: tools/bpf/resolve_btfids | |
1422 | endif | |
1423 | endif | |
1424 | ||
1425 | PHONY += resolve_btfids_clean | |
1426 | ||
1427 | resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids | |
1428 | ||
1429 | # tools/bpf/resolve_btfids directory might not exist | |
1430 | # in output directory, skip its clean in that case | |
1431 | resolve_btfids_clean: | |
1432 | ifneq ($(wildcard $(resolve_btfids_O)),) | |
1433 | $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean | |
1434 | endif | |
1435 | ||
1bb0b18a MY |
1436 | # Clear a bunch of variables before executing the submake |
1437 | ifeq ($(quiet),silent_) | |
1438 | tools_silent=s | |
1439 | endif | |
1440 | ||
1441 | tools/: FORCE | |
1442 | $(Q)mkdir -p $(objtree)/tools | |
1443 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ | |
1444 | ||
1445 | tools/%: FORCE | |
1446 | $(Q)mkdir -p $(objtree)/tools | |
1447 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* | |
1448 | ||
5a5da78b SK |
1449 | # --------------------------------------------------------------------------- |
1450 | # Kernel selftest | |
1451 | ||
1452 | PHONY += kselftest | |
4062eba9 | 1453 | kselftest: headers |
2bc84526 | 1454 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
5a5da78b | 1455 | |
4062eba9 | 1456 | kselftest-%: headers FORCE |
17eac6c2 | 1457 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* |
dcb825a9 | 1458 | |
3d6dee7a BJZ |
1459 | PHONY += kselftest-merge |
1460 | kselftest-merge: | |
1461 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
6d3db46c DR |
1462 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ |
1463 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
3e4c6948 | 1464 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
3d6dee7a | 1465 | |
37c8a5fa RH |
1466 | # --------------------------------------------------------------------------- |
1467 | # Devicetree files | |
1468 | ||
1469 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1470 | dtstree := arch/$(SRCARCH)/boot/dts | |
1471 | endif | |
1472 | ||
1473 | ifneq ($(dtstree),) | |
1474 | ||
ee476203 | 1475 | %.dtb: dtbs_prepare |
75e89534 | 1476 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
37c8a5fa | 1477 | |
ee476203 | 1478 | %.dtbo: dtbs_prepare |
75e89534 | 1479 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
ce88c9c7 | 1480 | |
ee476203 MY |
1481 | PHONY += dtbs dtbs_prepare dtbs_install dtbs_check |
1482 | dtbs: dtbs_prepare | |
37c8a5fa RH |
1483 | $(Q)$(MAKE) $(build)=$(dtstree) |
1484 | ||
ee476203 MY |
1485 | # include/config/kernel.release is actually needed when installing DTBs because |
1486 | # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make | |
1487 | # dtbs_install depend on it as dtbs_install may run as root. | |
1488 | dtbs_prepare: include/config/kernel.release scripts_dtc | |
1489 | ||
75e89534 | 1490 | ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) |
e10c4321 | 1491 | export CHECK_DTBS=y |
b5154bf6 MY |
1492 | dtbs: dt_binding_check |
1493 | endif | |
1494 | ||
b5154bf6 | 1495 | dtbs_check: dtbs |
4f0e3a57 | 1496 | |
37c8a5fa | 1497 | dtbs_install: |
2431f22a | 1498 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) |
37c8a5fa RH |
1499 | |
1500 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1501 | all: dtbs | |
1502 | endif | |
1503 | ||
1504 | endif | |
1505 | ||
1506 | PHONY += scripts_dtc | |
1507 | scripts_dtc: scripts_basic | |
1508 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1509 | ||
e10c4321 MY |
1510 | ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) |
1511 | export CHECK_DT_BINDING=y | |
1512 | endif | |
1513 | ||
c473a8d0 | 1514 | PHONY += dt_binding_check |
4f0e3a57 RH |
1515 | dt_binding_check: scripts_dtc |
1516 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1517 | ||
b6acf807 RH |
1518 | PHONY += dt_compatible_check |
1519 | dt_compatible_check: dt_binding_check | |
1520 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ | |
1521 | ||
1da177e4 LT |
1522 | # --------------------------------------------------------------------------- |
1523 | # Modules | |
1524 | ||
1525 | ifdef CONFIG_MODULES | |
1526 | ||
070b98bf | 1527 | # By default, build modules as well |
1da177e4 | 1528 | |
73d1393e | 1529 | all: modules |
1da177e4 | 1530 | |
4b50c8c4 MY |
1531 | # When we're building modules with modversions, we need to consider |
1532 | # the built-in objects during the descend as well, in order to | |
1533 | # make sure the checksums are up to date before we record them. | |
1534 | ifdef CONFIG_MODVERSIONS | |
1535 | KBUILD_BUILTIN := 1 | |
1536 | endif | |
1537 | ||
3fbb43df | 1538 | # Build modules |
551559e1 | 1539 | # |
1da177e4 | 1540 | |
f73edc89 MY |
1541 | # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES |
1542 | # is an exception. | |
1543 | ifdef CONFIG_DEBUG_INFO_BTF_MODULES | |
74d3320f | 1544 | KBUILD_BUILTIN := 1 |
f73edc89 MY |
1545 | modules: vmlinux |
1546 | endif | |
b2c88554 | 1547 | |
f73edc89 | 1548 | modules: modules_prepare |
68980b47 | 1549 | |
1da177e4 | 1550 | # Target to prepare building external modules |
059bc9fc | 1551 | modules_prepare: prepare |
596b0474 | 1552 | $(Q)$(MAKE) $(build)=scripts scripts/module.lds |
1da177e4 | 1553 | |
961ab4a3 MY |
1554 | export modules_sign_only := |
1555 | ||
1556 | ifeq ($(CONFIG_MODULE_SIG),y) | |
1557 | PHONY += modules_sign | |
1558 | modules_sign: modules_install | |
1559 | @: | |
1da177e4 | 1560 | |
961ab4a3 MY |
1561 | # modules_sign is a subset of modules_install. |
1562 | # 'make modules_install modules_sign' is equivalent to 'make modules_install'. | |
1563 | ifeq ($(filter modules_install,$(MAKECMDGOALS)),) | |
1564 | modules_sign_only := y | |
1565 | endif | |
1566 | endif | |
1567 | ||
1568 | modinst_pre := | |
1569 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
1570 | modinst_pre := __modinst_pre | |
1571 | endif | |
1572 | ||
1573 | modules_install: $(modinst_pre) | |
3e3005df MY |
1574 | PHONY += __modinst_pre |
1575 | __modinst_pre: | |
1da177e4 LT |
1576 | @rm -rf $(MODLIB)/kernel |
1577 | @rm -f $(MODLIB)/source | |
1578 | @mkdir -p $(MODLIB)/kernel | |
8e9b4667 | 1579 | @ln -s $(abspath $(srctree)) $(MODLIB)/source |
1da177e4 LT |
1580 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1581 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1582 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1583 | fi |
f65a4868 | 1584 | @sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order |
2c6d9636 MY |
1585 | @cp -f modules.builtin $(MODLIB)/ |
1586 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ | |
1da177e4 LT |
1587 | |
1588 | endif # CONFIG_MODULES | |
1589 | ||
1da177e4 LT |
1590 | ### |
1591 | # Cleaning is done on three levels. | |
1592 | # make clean Delete most generated files | |
1593 | # Leave enough to build external modules | |
1594 | # make mrproper Delete the current configuration, and all generated files | |
1595 | # make distclean Remove editor backup files, patch leftover files and the like | |
1596 | ||
1597 | # Directories & files removed with 'make clean' | |
69bc8d38 | 1598 | CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ |
3d32285f | 1599 | modules.builtin modules.builtin.modinfo modules.nsdeps \ |
8afc66e8 LT |
1600 | compile_commands.json .thinlto-cache rust/test rust/doc \ |
1601 | .vmlinux.objs .vmlinux.export.c | |
1da177e4 LT |
1602 | |
1603 | # Directories & files removed with 'make mrproper' | |
0663c68c | 1604 | MRPROPER_FILES += include/config include/generated \ |
b0d6207b | 1605 | arch/$(SRCARCH)/include/generated .objdiff \ |
0663c68c MY |
1606 | debian snap tar-install \ |
1607 | .config .config.old .version \ | |
46457133 | 1608 | Module.symvers \ |
5cca3606 | 1609 | certs/signing_key.pem \ |
b31f2a49 NJ |
1610 | certs/x509.genkey \ |
1611 | vmlinux-gdb.py \ | |
2f7ab126 | 1612 | *.spec \ |
c83b16ce | 1613 | rust/libmacros.so |
1da177e4 LT |
1614 | |
1615 | # clean - Delete most, but leave enough to build external modules | |
1616 | # | |
1da177e4 | 1617 | clean: rm-files := $(CLEAN_FILES) |
1da177e4 | 1618 | |
76cd306d | 1619 | PHONY += archclean vmlinuxclean |
1da177e4 | 1620 | |
bd1ee804 PM |
1621 | vmlinuxclean: |
1622 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
fbe6e37d | 1623 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
bd1ee804 | 1624 | |
50d3a3f8 | 1625 | clean: archclean vmlinuxclean resolve_btfids_clean |
1da177e4 LT |
1626 | |
1627 | # mrproper - Delete all generated files, including .config | |
1628 | # | |
1da177e4 | 1629 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
cb43fb57 | 1630 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
1da177e4 | 1631 | |
b421b8a6 | 1632 | PHONY += $(mrproper-dirs) mrproper |
1da177e4 LT |
1633 | $(mrproper-dirs): |
1634 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1635 | ||
b421b8a6 | 1636 | mrproper: clean $(mrproper-dirs) |
1da177e4 | 1637 | $(call cmd,rmfiles) |
2f7ab126 MO |
1638 | @find . $(RCS_FIND_IGNORE) \ |
1639 | \( -name '*.rmeta' \) \ | |
1640 | -type f -print | xargs rm -f | |
1da177e4 LT |
1641 | |
1642 | # distclean | |
1643 | # | |
4f193362 | 1644 | PHONY += distclean |
1da177e4 LT |
1645 | |
1646 | distclean: mrproper | |
19c8d912 | 1647 | @find . $(RCS_FIND_IGNORE) \ |
070b98bf | 1648 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
f78271df | 1649 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
7a02cec5 MY |
1650 | -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ |
1651 | -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ | |
1da177e4 LT |
1652 | -type f -print | xargs rm -f |
1653 | ||
1654 | ||
1655 | # Packaging of the kernel to various formats | |
1656 | # --------------------------------------------------------------------------- | |
1da177e4 | 1657 | |
bafb6747 | 1658 | %src-pkg: FORCE |
000ec95f | 1659 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
031ecc6d | 1660 | %pkg: include/config/kernel.release FORCE |
000ec95f | 1661 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
1da177e4 LT |
1662 | |
1663 | # Brief documentation of the typical targets used | |
1664 | # --------------------------------------------------------------------------- | |
1665 | ||
5dffbe81 | 1666 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1667 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1668 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1669 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 | 1670 | |
fe69b420 | 1671 | PHONY += help |
1da177e4 LT |
1672 | help: |
1673 | @echo 'Cleaning targets:' | |
5ea084ef | 1674 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1675 | @echo ' enough build support to build external modules' |
5ea084ef | 1676 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1677 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1678 | @echo '' |
1679 | @echo 'Configuration targets:' | |
1680 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1681 | @echo '' | |
1682 | @echo 'Other generic targets:' | |
1683 | @echo ' all - Build all targets marked with [*]' | |
1684 | @echo '* vmlinux - Build the bare kernel' | |
1685 | @echo '* modules - Build all modules' | |
9cc5d74c | 1686 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 | 1687 | @echo ' dir/ - Build all files in dir and below' |
40ab87a4 | 1688 | @echo ' dir/file.[ois] - Build specified target only' |
433db3e2 VT |
1689 | @echo ' dir/file.ll - Build the LLVM assembly file' |
1690 | @echo ' (requires compiler support for LLVM assembly generation)' | |
62718979 JP |
1691 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
1692 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1693 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1694 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1695 | @echo ' tags/TAGS - Generate tags file for editors' |
1696 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1697 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1698 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1699 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1700 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1701 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1702 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1703 | echo '' |
31b8cc80 | 1704 | @echo 'Static analysers:' |
1da177e4 | 1705 | @echo ' checkstack - Generate a list of stack hogs' |
aa025e7d | 1706 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1707 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1708 | @echo ' export_report - List the usages of all exported symbols' |
74425eee | 1709 | @echo ' headerdep - Detect inclusion cycles in headers' |
7f855fc8 | 1710 | @echo ' coccicheck - Check with Coccinelle' |
6ad7cbc0 NH |
1711 | @echo ' clang-analyzer - Check with clang static analyzer' |
1712 | @echo ' clang-tidy - Check with clang-tidy' | |
74425eee | 1713 | @echo '' |
eb8305ae MM |
1714 | @echo 'Tools:' |
1715 | @echo ' nsdeps - Generate missing symbol namespace dependencies' | |
1716 | @echo '' | |
31b8cc80 | 1717 | @echo 'Kernel selftest:' |
e51d8dac SK |
1718 | @echo ' kselftest - Build and run kernel selftest' |
1719 | @echo ' Build, install, and boot kernel before' | |
1720 | @echo ' running kselftest on it' | |
1721 | @echo ' Run as root for full coverage' | |
1722 | @echo ' kselftest-all - Build kernel selftest' | |
1723 | @echo ' kselftest-install - Build and install kernel selftest' | |
1724 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1725 | @echo ' kselftest-merge - Merge all the config dependencies of' | |
1726 | @echo ' kselftest to existing .config.' | |
5a5da78b | 1727 | @echo '' |
2f7ab126 MO |
1728 | @echo 'Rust targets:' |
1729 | @echo ' rustavailable - Checks whether the Rust toolchain is' | |
1730 | @echo ' available and, if not, explains why.' | |
1731 | @echo ' rustfmt - Reformat all the Rust code in the kernel' | |
1732 | @echo ' rustfmtcheck - Checks if all the Rust code in the kernel' | |
1733 | @echo ' is formatted, printing a diff otherwise.' | |
1734 | @echo ' rustdoc - Generate Rust documentation' | |
1735 | @echo ' (requires kernel .config)' | |
1736 | @echo ' rusttest - Runs the Rust tests' | |
1737 | @echo ' (requires kernel .config; downloads external repos)' | |
1738 | @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file' | |
1739 | @echo ' (requires kernel .config)' | |
1740 | @echo ' dir/file.[os] - Build specified target only' | |
1741 | @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.' | |
1742 | @echo ' Run with RUSTFMT=n to skip reformatting if needed.' | |
1743 | @echo ' The output is not intended to be compilable.' | |
1744 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1745 | @echo '' | |
37c8a5fa RH |
1746 | @$(if $(dtstree), \ |
1747 | echo 'Devicetree:'; \ | |
7aa8dd91 SB |
1748 | echo '* dtbs - Build device tree blobs for enabled boards'; \ |
1749 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1750 | echo ' dt_binding_check - Validate device tree binding documents'; \ | |
1751 | echo ' dtbs_check - Validate device tree source files';\ | |
37c8a5fa RH |
1752 | echo '') |
1753 | ||
31b8cc80 RD |
1754 | @echo 'Userspace tools targets:' |
1755 | @echo ' use "make tools/help"' | |
1756 | @echo ' or "cd tools; make help"' | |
1757 | @echo '' | |
1da177e4 | 1758 | @echo 'Kernel packaging:' |
000ec95f | 1759 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
1da177e4 LT |
1760 | @echo '' |
1761 | @echo 'Documentation targets:' | |
cb43fb57 | 1762 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
1da177e4 | 1763 | @echo '' |
01dee188 | 1764 | @echo 'Architecture specific targets ($(SRCARCH)):' |
5c816641 | 1765 | @$(or $(archhelp),\ |
01dee188 | 1766 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1767 | @echo '' |
1768 | @$(if $(boards), \ | |
1769 | $(foreach b, $(boards), \ | |
4234448b | 1770 | printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
1da177e4 | 1771 | echo '') |
5dffbe81 SB |
1772 | @$(if $(board-dirs), \ |
1773 | $(foreach b, $(board-dirs), \ | |
1774 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1775 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1776 | echo '') | |
1da177e4 | 1777 | |
83d98d73 | 1778 | @echo ' make V=n [targets] 1: verbose build' |
6ae4b986 MY |
1779 | @echo ' 2: give reason for rebuild of target' |
1780 | @echo ' V=1 and V=2 can be combined with V=12' | |
1da177e4 | 1781 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
a64c0440 GU |
1782 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' |
1783 | @echo ' (sparse by default)' | |
701842e3 | 1784 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
af07ce3e | 1785 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
e27128db | 1786 | @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where' |
28bc20dc SR |
1787 | @echo ' 1: warnings which may be relevant and do not occur too often' |
1788 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1789 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
c77d06e7 | 1790 | @echo ' e: warnings are being treated as errors' |
a6de553d | 1791 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1792 | @echo '' |
1793 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1794 | @echo 'For further info see the ./README file' | |
1795 | ||
1796 | ||
5dffbe81 SB |
1797 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1798 | ||
1799 | help-boards: $(help-board-dirs) | |
1800 | ||
fbae4d58 | 1801 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1802 | |
1803 | $(help-board-dirs): help-%: | |
1804 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1805 | @$(if $(boards-per-dir), \ | |
1806 | $(foreach b, $(boards-per-dir), \ | |
1807 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1808 | echo '') | |
1809 | ||
1810 | ||
1da177e4 LT |
1811 | # Documentation targets |
1812 | # --------------------------------------------------------------------------- | |
e8939222 | 1813 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
1f050e90 | 1814 | linkcheckdocs dochelp refcheckdocs texinfodocs infodocs |
22cba31b | 1815 | PHONY += $(DOC_TARGETS) |
bc7b752a | 1816 | $(DOC_TARGETS): |
cb43fb57 | 1817 | $(Q)$(MAKE) $(build)=Documentation $@ |
1da177e4 | 1818 | |
2f7ab126 MO |
1819 | |
1820 | # Rust targets | |
1821 | # --------------------------------------------------------------------------- | |
1822 | ||
1823 | # "Is Rust available?" target | |
1824 | PHONY += rustavailable | |
1825 | rustavailable: | |
1826 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!" | |
1827 | ||
1828 | # Documentation target | |
1829 | # | |
1830 | # Using the singular to avoid running afoul of `no-dot-config-targets`. | |
1831 | PHONY += rustdoc | |
1832 | rustdoc: prepare | |
1833 | $(Q)$(MAKE) $(build)=rust $@ | |
1834 | ||
1835 | # Testing target | |
1836 | PHONY += rusttest | |
1837 | rusttest: prepare | |
1838 | $(Q)$(MAKE) $(build)=rust $@ | |
1839 | ||
1840 | # Formatting targets | |
1841 | PHONY += rustfmt rustfmtcheck | |
1842 | ||
1843 | # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream. | |
1844 | # | |
1845 | # We match using absolute paths since `find` does not resolve them | |
1846 | # when matching, which is a problem when e.g. `srctree` is `..`. | |
1847 | # We `grep` afterwards in order to remove the directory entry itself. | |
1848 | rustfmt: | |
1849 | $(Q)find $(abs_srctree) -type f -name '*.rs' \ | |
1850 | -o -path $(abs_srctree)/rust/alloc -prune \ | |
1851 | -o -path $(abs_objtree)/rust/test -prune \ | |
1852 | | grep -Fv $(abs_srctree)/rust/alloc \ | |
1853 | | grep -Fv $(abs_objtree)/rust/test \ | |
1854 | | grep -Fv generated \ | |
1855 | | xargs $(RUSTFMT) $(rustfmt_flags) | |
1856 | ||
1857 | rustfmtcheck: rustfmt_flags = --check | |
1858 | rustfmtcheck: rustfmt | |
1859 | ||
1860 | # IDE support targets | |
1861 | PHONY += rust-analyzer | |
1862 | rust-analyzer: | |
1863 | $(Q)$(MAKE) $(build)=rust $@ | |
1864 | ||
67274c08 MY |
1865 | # Misc |
1866 | # --------------------------------------------------------------------------- | |
1867 | ||
91ecf7ff MY |
1868 | PHONY += misc-check |
1869 | misc-check: | |
1870 | $(Q)$(srctree)/scripts/misc-check | |
1871 | ||
1872 | all: misc-check | |
1873 | ||
67274c08 | 1874 | PHONY += scripts_gdb |
7a739ce5 | 1875 | scripts_gdb: prepare0 |
1e5ff84f | 1876 | $(Q)$(MAKE) $(build)=scripts/gdb |
8d2e5200 | 1877 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
67274c08 MY |
1878 | |
1879 | ifdef CONFIG_GDB_SCRIPTS | |
1880 | all: scripts_gdb | |
1881 | endif | |
1882 | ||
1da177e4 LT |
1883 | else # KBUILD_EXTMOD |
1884 | ||
1885 | ### | |
1886 | # External module support. | |
1887 | # When building external modules the kernel used as basis is considered | |
1888 | # read-only, and no consistency checks are made and the make | |
1889 | # system is not used on the basis kernel. If updates are required | |
11122b86 | 1890 | # in the basis kernel ordinary make commands (without M=...) must be used. |
1da177e4 | 1891 | |
6212804f MY |
1892 | # We are always building only modules. |
1893 | KBUILD_BUILTIN := | |
1da177e4 | 1894 | KBUILD_MODULES := 1 |
1da177e4 | 1895 | |
5750121a | 1896 | build-dir := $(KBUILD_EXTMOD) |
3d32285f | 1897 | |
7f69180b | 1898 | compile_commands.json: $(extmod_prefix)compile_commands.json |
3d32285f MY |
1899 | PHONY += compile_commands.json |
1900 | ||
76cd306d | 1901 | clean-dirs := $(KBUILD_EXTMOD) |
3d32285f | 1902 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ |
dc5723b0 | 1903 | $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache |
1da177e4 | 1904 | |
6072b2c4 MY |
1905 | PHONY += prepare |
1906 | # now expand this into a simple variable to reduce the cost of shell evaluations | |
1907 | prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT) | |
1908 | prepare: | |
129ab0d2 | 1909 | @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \ |
6072b2c4 | 1910 | echo >&2 "warning: the compiler differs from the one used to build the kernel"; \ |
129ab0d2 | 1911 | echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \ |
6072b2c4 MY |
1912 | echo >&2 " You are using: $(CC_VERSION_TEXT)"; \ |
1913 | fi | |
1914 | ||
fe69b420 | 1915 | PHONY += help |
1da177e4 LT |
1916 | help: |
1917 | @echo ' Building external modules.' | |
1918 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1919 | @echo '' | |
1920 | @echo ' modules - default target, build the module(s)' | |
1921 | @echo ' modules_install - install the module' | |
1922 | @echo ' clean - remove generated files in module directory only' | |
1923 | @echo '' | |
06300b21 | 1924 | |
1da177e4 LT |
1925 | endif # KBUILD_EXTMOD |
1926 | ||
3e3005df MY |
1927 | # --------------------------------------------------------------------------- |
1928 | # Modules | |
1929 | ||
7f371813 | 1930 | PHONY += modules modules_install modules_prepare |
3e3005df MY |
1931 | |
1932 | ifdef CONFIG_MODULES | |
1933 | ||
5750121a MY |
1934 | $(MODORDER): $(build-dir) |
1935 | @: | |
1936 | ||
f73edc89 MY |
1937 | # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. |
1938 | # This is solely useful to speed up test compiles. | |
1939 | modules: modpost | |
1940 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) | |
1941 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
1942 | endif | |
3e3005df | 1943 | |
1a998be6 MY |
1944 | PHONY += modules_check |
1945 | modules_check: $(MODORDER) | |
1946 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< | |
1947 | ||
3ac42b21 | 1948 | quiet_cmd_depmod = DEPMOD $(MODLIB) |
3e3005df MY |
1949 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
1950 | $(KERNELRELEASE) | |
1951 | ||
1952 | modules_install: | |
1953 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1954 | $(call cmd,depmod) | |
1955 | ||
1956 | else # CONFIG_MODULES | |
1957 | ||
1958 | # Modules not configured | |
1959 | # --------------------------------------------------------------------------- | |
1960 | ||
1961 | modules modules_install: | |
1962 | @echo >&2 '***' | |
1963 | @echo >&2 '*** The present kernel configuration has modules disabled.' | |
1964 | @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' | |
1965 | @echo >&2 '*** to enable CONFIG_MODULES.' | |
1966 | @echo >&2 '***' | |
1967 | @exit 1 | |
1968 | ||
f110e5a2 MY |
1969 | KBUILD_MODULES := |
1970 | ||
3e3005df MY |
1971 | endif # CONFIG_MODULES |
1972 | ||
f73edc89 MY |
1973 | PHONY += modpost |
1974 | modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \ | |
1975 | $(if $(KBUILD_MODULES), modules_check) | |
1976 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1977 | ||
b1fbfcb4 MY |
1978 | # Single targets |
1979 | # --------------------------------------------------------------------------- | |
1980 | # To build individual files in subdirectories, you can do like this: | |
1981 | # | |
1982 | # make foo/bar/baz.s | |
1983 | # | |
1984 | # The supported suffixes for single-target are listed in 'single-targets' | |
1985 | # | |
1986 | # To build only under specific subdirectories, you can do like this: | |
1987 | # | |
1988 | # make foo/bar/baz/ | |
1989 | ||
1990 | ifdef single-build | |
1991 | ||
1992 | # .ko is special because modpost is needed | |
1993 | single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) | |
fc93a4cd MY |
1994 | single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \ |
1995 | $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko))) | |
b1fbfcb4 | 1996 | |
f73edc89 | 1997 | $(single-ko): single_modules |
b1fbfcb4 | 1998 | @: |
5750121a | 1999 | $(single-no-ko): $(build-dir) |
b1fbfcb4 MY |
2000 | @: |
2001 | ||
f110e5a2 | 2002 | # Remove MODORDER when done because it is not the real one. |
f73edc89 MY |
2003 | PHONY += single_modules |
2004 | single_modules: $(single-no-ko) modules_prepare | |
a53da43d | 2005 | $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER) |
b1fbfcb4 | 2006 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
f73edc89 MY |
2007 | ifneq ($(KBUILD_MODPOST_NOFINAL),1) |
2008 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal | |
b1fbfcb4 | 2009 | endif |
f110e5a2 | 2010 | $(Q)rm -f $(MODORDER) |
b1fbfcb4 | 2011 | |
5750121a | 2012 | single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) |
b1fbfcb4 | 2013 | |
3753af77 MY |
2014 | KBUILD_MODULES := 1 |
2015 | ||
b480fec9 MY |
2016 | endif |
2017 | ||
c99f3918 MY |
2018 | # Preset locale variables to speed up the build process. Limit locale |
2019 | # tweaks to this spot to avoid wrong language settings when running | |
2020 | # make menuconfig etc. | |
2021 | # Error messages still appears in the original language | |
5750121a MY |
2022 | PHONY += $(build-dir) |
2023 | $(build-dir): prepare | |
2024 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals) | |
c99f3918 | 2025 | |
76cd306d MY |
2026 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) |
2027 | PHONY += $(clean-dirs) clean | |
2028 | $(clean-dirs): | |
2029 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
2030 | ||
88d7be03 | 2031 | clean: $(clean-dirs) |
88d7be03 | 2032 | $(call cmd,rmfiles) |
5c816641 | 2033 | @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
2f7ab126 | 2034 | \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ |
4f0e3a57 | 2035 | -o -name '*.ko.*' \ |
dcad240c AD |
2036 | -o -name '*.dtb' -o -name '*.dtbo' \ |
2037 | -o -name '*.dtb.S' -o -name '*.dtbo.S' \ | |
2038 | -o -name '*.dt.yaml' \ | |
ef46d9b3 | 2039 | -o -name '*.dwo' -o -name '*.lst' \ |
9413e764 | 2040 | -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \ |
88d7be03 | 2041 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
9a8dfb39 | 2042 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
4fa8bc94 | 2043 | -o -name '*.asn1.[ch]' \ |
88d7be03 | 2044 | -o -name '*.symtypes' -o -name 'modules.order' \ |
6b90bd4b | 2045 | -o -name '*.c.[012]*.*' \ |
433db3e2 | 2046 | -o -name '*.ll' \ |
38e89184 | 2047 | -o -name '*.gcno' \ |
9c73bcfa TW |
2048 | -o -name '*.*.symversions' \) -type f -print \ |
2049 | -o -name '.tmp_*' -print \ | |
2050 | | xargs rm -rf | |
88d7be03 | 2051 | |
1da177e4 LT |
2052 | # Generate tags for editors |
2053 | # --------------------------------------------------------------------------- | |
a680eedc | 2054 | quiet_cmd_tags = GEN $@ |
858805b3 | 2055 | cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
1da177e4 | 2056 | |
f4ed1009 | 2057 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
2058 | $(call cmd,tags) |
2059 | ||
eb8305ae MM |
2060 | # Script to generate missing namespace dependencies |
2061 | # --------------------------------------------------------------------------- | |
2062 | ||
2063 | PHONY += nsdeps | |
bff9c62b | 2064 | nsdeps: export KBUILD_NSDEPS=1 |
eb8305ae | 2065 | nsdeps: modules |
bff9c62b | 2066 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps |
eb8305ae | 2067 | |
3d32285f MY |
2068 | # Clang Tooling |
2069 | # --------------------------------------------------------------------------- | |
2070 | ||
2071 | quiet_cmd_gen_compile_commands = GEN $@ | |
2072 | cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) | |
2073 | ||
7f69180b | 2074 | $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ |
32164845 | 2075 | $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ |
3d32285f MY |
2076 | $(if $(CONFIG_MODULES), $(MODORDER)) FORCE |
2077 | $(call if_changed,gen_compile_commands) | |
2078 | ||
7f69180b | 2079 | targets += $(extmod_prefix)compile_commands.json |
3d32285f | 2080 | |
6ad7cbc0 NH |
2081 | PHONY += clang-tidy clang-analyzer |
2082 | ||
2083 | ifdef CONFIG_CC_IS_CLANG | |
2084 | quiet_cmd_clang_tools = CHECK $< | |
2085 | cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< | |
2086 | ||
7f69180b | 2087 | clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json |
6ad7cbc0 NH |
2088 | $(call cmd,clang_tools) |
2089 | else | |
2090 | clang-tidy clang-analyzer: | |
2091 | @echo "$@ requires CC=clang" >&2 | |
2092 | @false | |
2093 | endif | |
2094 | ||
1da177e4 LT |
2095 | # Scripts to check various things for consistency |
2096 | # --------------------------------------------------------------------------- | |
2097 | ||
7dfbea4c | 2098 | PHONY += includecheck versioncheck coccicheck export_report |
279f3dd3 | 2099 | |
1da177e4 | 2100 | includecheck: |
436f876c | 2101 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 2102 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 2103 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
2104 | |
2105 | versioncheck: | |
2ee2d292 | 2106 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 2107 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 2108 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 2109 | |
74425eee | 2110 | coccicheck: |
858805b3 | 2111 | $(Q)$(BASH) $(srctree)/scripts/$@ |
74425eee | 2112 | |
295ac051 AB |
2113 | export_report: |
2114 | $(PERL) $(srctree)/scripts/export_report.pl | |
2115 | ||
c398ff00 | 2116 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 2117 | |
011e3a9a JD |
2118 | # UML needs a little special treatment here. It wants to use the host |
2119 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
2120 | # else wants $(ARCH), including people doing cross-builds, which means | |
2121 | # that $(SUBARCH) doesn't work here. | |
2122 | ifeq ($(ARCH), um) | |
2123 | CHECKSTACK_ARCH := $(SUBARCH) | |
2124 | else | |
2125 | CHECKSTACK_ARCH := $(ARCH) | |
2126 | endif | |
1da177e4 LT |
2127 | checkstack: |
2128 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
75dd4747 | 2129 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 2130 | |
7b8ea53d | 2131 | kernelrelease: |
1cb86b6c | 2132 | @$(filechk_kernel.release) |
01ab1788 | 2133 | |
cb58455c | 2134 | kernelversion: |
2244cbd8 | 2135 | @echo $(KERNELVERSION) |
1da177e4 | 2136 | |
c398ff00 MM |
2137 | image_name: |
2138 | @echo $(KBUILD_IMAGE) | |
2139 | ||
1da177e4 | 2140 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
0663c68c | 2141 | cmd_rmfiles = rm -rf $(rm-files) |
1da177e4 | 2142 | |
392885ee MY |
2143 | # read saved command lines for existing targets |
2144 | existing-targets := $(wildcard $(sort $(targets))) | |
1da177e4 | 2145 | |
b999923c | 2146 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
1da177e4 | 2147 | |
46b7c492 | 2148 | endif # config-build |
2042b548 MY |
2149 | endif # mixed-build |
2150 | endif # need-sub-make | |
1da177e4 | 2151 | |
4f193362 | 2152 | PHONY += FORCE |
1da177e4 | 2153 | FORCE: |
4f193362 | 2154 | |
bd412d81 | 2155 | # Declare the contents of the PHONY variable as phony. We keep that |
fe8d0a41 | 2156 | # information in a variable so we can use it in if_changed and friends. |
4f193362 | 2157 | .PHONY: $(PHONY) |