1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 2 VERSION = 6
3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 5
4 SUBLEVEL = 5 !! 4 SUBLEVEL = 13
5 EXTRAVERSION = 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Hurr durr I'ma ninja sloth
7 7
8 # *DOCUMENTATION* 8 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 10 # More info can be located in ./README
11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file.
13 13
14 ifeq ($(filter output-sync,$(.FEATURES)),) !! 14 ifeq ($(filter undefine,$(.FEATURES)),)
15 $(error GNU Make >= 4.0 is required. Your Make !! 15 $(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION))
16 endif 16 endif
17 17
18 $(if $(filter __%, $(MAKECMDGOALS)), \ 18 $(if $(filter __%, $(MAKECMDGOALS)), \
19 $(error targets prefixed with '__' are 19 $(error targets prefixed with '__' are only for internal use))
20 20
21 # That's our default target when none is given 21 # That's our default target when none is given on the command line
22 PHONY := __all 22 PHONY := __all
23 __all: 23 __all:
24 24
25 # We are using a recursive build, so we need t 25 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 26 # to get the ordering right.
27 # 27 #
28 # Most importantly: sub-Makefiles should only 28 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 29 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 30 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 31 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 32 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 33 # after that we are sure that everything which is in that other dir
34 # is now up to date. 34 # is now up to date.
35 # 35 #
36 # The only cases where we need to modify files 36 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 37 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 38 # descending is started. They are now explicitly listed as the
39 # prepare rule. 39 # prepare rule.
40 40
41 this-makefile := $(lastword $(MAKEFILE_LIST)) 41 this-makefile := $(lastword $(MAKEFILE_LIST))
42 abs_srctree := $(realpath $(dir $(this-makefil !! 42 export abs_srctree := $(realpath $(dir $(this-makefile)))
43 abs_objtree := $(CURDIR) !! 43 export abs_objtree := $(CURDIR)
44 44
45 ifneq ($(sub_make_done),1) 45 ifneq ($(sub_make_done),1)
46 46
47 # Do not use make's built-in rules and variabl 47 # Do not use make's built-in rules and variables
48 # (this increases performance and avoids hard- 48 # (this increases performance and avoids hard-to-debug behaviour)
49 MAKEFLAGS += -rR 49 MAKEFLAGS += -rR
50 50
51 # Avoid funny character set dependencies 51 # Avoid funny character set dependencies
52 unexport LC_ALL 52 unexport LC_ALL
53 LC_COLLATE=C 53 LC_COLLATE=C
54 LC_NUMERIC=C 54 LC_NUMERIC=C
55 export LC_COLLATE LC_NUMERIC 55 export LC_COLLATE LC_NUMERIC
56 56
57 # Avoid interference with shell env settings 57 # Avoid interference with shell env settings
58 unexport GREP_OPTIONS 58 unexport GREP_OPTIONS
59 59
60 # Beautify output 60 # Beautify output
61 # -------------------------------------------- 61 # ---------------------------------------------------------------------------
62 # 62 #
63 # Most of build commands in Kbuild start with 63 # Most of build commands in Kbuild start with "cmd_". You can optionally define
64 # "quiet_cmd_*". If defined, the short log is 64 # "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from
65 # that command is printed by default. 65 # that command is printed by default.
66 # 66 #
67 # e.g.) 67 # e.g.)
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) 68 # quiet_cmd_depmod = DEPMOD $(MODLIB)
69 # cmd_depmod = $(srctree)/scripts/dep 69 # cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE)
70 # 70 #
71 # A simple variant is to prefix commands with 71 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 72 # for commands that shall be hidden in non-verbose mode.
73 # 73 #
74 # $(Q)$(MAKE) $(build)=scripts/basic 74 # $(Q)$(MAKE) $(build)=scripts/basic
75 # 75 #
76 # If KBUILD_VERBOSE contains 1, the whole comm 76 # If KBUILD_VERBOSE contains 1, the whole command is echoed.
77 # If KBUILD_VERBOSE contains 2, the reason for 77 # If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed.
78 # 78 #
79 # To put more focus on warnings, be less verbo 79 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 80 # Use 'make V=1' to see the full commands
81 81
82 ifeq ("$(origin V)", "command line") 82 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 83 KBUILD_VERBOSE = $(V)
84 endif 84 endif
85 85
86 quiet = quiet_ 86 quiet = quiet_
87 Q = @ 87 Q = @
88 88
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)
90 quiet = 90 quiet =
91 Q = 91 Q =
92 endif 92 endif
93 93
94 # If the user is running make -s (silent mode) 94 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 95 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 96 # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
>> 97
>> 98 ifeq ($(filter 3.%,$(MAKE_VERSION)),)
>> 99 short-opts := $(firstword -$(MAKEFLAGS))
>> 100 else
>> 101 short-opts := $(filter-out --%,$(MAKEFLAGS))
>> 102 endif
>> 103
>> 104 ifneq ($(findstring s,$(short-opts)),)
97 quiet=silent_ 105 quiet=silent_
98 override KBUILD_VERBOSE := 106 override KBUILD_VERBOSE :=
99 endif 107 endif
100 108
101 export quiet Q KBUILD_VERBOSE 109 export quiet Q KBUILD_VERBOSE
102 110
103 # Call a source code checker (by default, "spa 111 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation. 112 # C compilation.
105 # 113 #
106 # Use 'make C=1' to enable checking of only re 114 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s 115 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not. 116 # of whether they are re-compiled or not.
109 # 117 #
110 # See the file "Documentation/dev-tools/sparse 118 # See the file "Documentation/dev-tools/sparse.rst" for more details,
111 # including where to get the "sparse" utility. 119 # including where to get the "sparse" utility.
112 120
113 ifeq ("$(origin C)", "command line") 121 ifeq ("$(origin C)", "command line")
114 KBUILD_CHECKSRC = $(C) 122 KBUILD_CHECKSRC = $(C)
115 endif 123 endif
116 ifndef KBUILD_CHECKSRC 124 ifndef KBUILD_CHECKSRC
117 KBUILD_CHECKSRC = 0 125 KBUILD_CHECKSRC = 0
118 endif 126 endif
119 127
120 export KBUILD_CHECKSRC 128 export KBUILD_CHECKSRC
121 129
122 # Enable "clippy" (a linter) as part of the Ru 130 # Enable "clippy" (a linter) as part of the Rust compilation.
123 # 131 #
124 # Use 'make CLIPPY=1' to enable it. 132 # Use 'make CLIPPY=1' to enable it.
125 ifeq ("$(origin CLIPPY)", "command line") 133 ifeq ("$(origin CLIPPY)", "command line")
126 KBUILD_CLIPPY := $(CLIPPY) 134 KBUILD_CLIPPY := $(CLIPPY)
127 endif 135 endif
128 136
129 export KBUILD_CLIPPY 137 export KBUILD_CLIPPY
130 138
131 # Use make M=dir or set the environment variab 139 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
132 # directory of external module to build. Setti 140 # directory of external module to build. Setting M= takes precedence.
133 ifeq ("$(origin M)", "command line") 141 ifeq ("$(origin M)", "command line")
134 KBUILD_EXTMOD := $(M) 142 KBUILD_EXTMOD := $(M)
135 endif 143 endif
136 144
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ 145 $(if $(word 2, $(KBUILD_EXTMOD)), \
138 $(error building multiple external mod 146 $(error building multiple external modules is not supported))
139 147
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI 148 $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
141 $(error module directory path cannot c 149 $(error module directory path cannot contain '$x')))
142 150
143 # Remove trailing slashes 151 # Remove trailing slashes
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 152 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM 153 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
146 endif 154 endif
147 155
148 export KBUILD_EXTMOD 156 export KBUILD_EXTMOD
149 157
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif <<
156 <<
157 export KBUILD_EXTRA_WARN <<
158 <<
159 # Kbuild will save output files in the current 158 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t 159 # This does not need to match to the root of the kernel source tree.
161 # 160 #
162 # For example, you can do this: 161 # For example, you can do this:
163 # 162 #
164 # cd /dir/to/store/output/files; make -f /dir 163 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 # 164 #
166 # If you want to save output files in a differ 165 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it. 166 # two syntaxes to specify it.
168 # 167 #
169 # 1) O= 168 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 169 # Use "make O=dir/to/store/output/files/"
171 # 170 #
172 # 2) Set KBUILD_OUTPUT 171 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t 172 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil 173 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 # 174 #
176 # The O= assignment takes precedence over the 175 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 176 # variable.
178 177
179 # Do we want to change the working directory? 178 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line") 179 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 180 KBUILD_OUTPUT := $(O)
182 endif 181 endif
183 182
184 ifneq ($(KBUILD_OUTPUT),) 183 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does !! 184 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 185 # expand a shell special character '~'. We use a somewhat tedious way here.
>> 186 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
>> 187 $(if $(abs_objtree),, \
>> 188 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
>> 189
187 # $(realpath ...) resolves symlinks 190 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 191 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create <<
190 endif # ifneq ($(KBUILD_OUTPUT),) 192 endif # ifneq ($(KBUILD_OUTPUT),)
191 193
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 194 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
193 $(error source directory cannot contain spaces 195 $(error source directory cannot contain spaces or colons)
194 endif 196 endif
195 197
>> 198 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
>> 199 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
>> 200 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
>> 201 need-sub-make := 1
>> 202 # Cancel implicit rules for this Makefile.
>> 203 $(this-makefile): ;
>> 204 endif
>> 205
196 export sub_make_done := 1 206 export sub_make_done := 1
197 207
198 endif # sub_make_done 208 endif # sub_make_done
199 209
200 ifeq ($(abs_objtree),$(CURDIR)) 210 ifeq ($(abs_objtree),$(CURDIR))
201 # Suppress "Entering directory ..." if we are 211 # Suppress "Entering directory ..." if we are at the final work directory.
202 no-print-directory := --no-print-directory 212 no-print-directory := --no-print-directory
203 else 213 else
204 # Recursion to show "Entering directory ..." 214 # Recursion to show "Entering directory ..."
205 need-sub-make := 1 215 need-sub-make := 1
206 endif 216 endif
207 217
208 ifeq ($(filter --no-print-directory, $(MAKEFLA 218 ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),)
209 # If --no-print-directory is unset, recurse on 219 # If --no-print-directory is unset, recurse once again to set it.
210 # You may end up recursing into __sub-make twi 220 # You may end up recursing into __sub-make twice. This is needed due to the
211 # behavior change in GNU Make 4.4.1. 221 # behavior change in GNU Make 4.4.1.
212 need-sub-make := 1 222 need-sub-make := 1
213 endif 223 endif
214 224
215 ifeq ($(need-sub-make),1) 225 ifeq ($(need-sub-make),1)
216 226
217 PHONY += $(MAKECMDGOALS) __sub-make 227 PHONY += $(MAKECMDGOALS) __sub-make
218 228
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) 229 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220 @: 230 @:
221 231
222 # Invoke a second make in the output directory 232 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: 233 __sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ 234 $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \
225 -f $(abs_srctree)/Makefile $(MAKECMDGO 235 -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
226 236
227 else # need-sub-make 237 else # need-sub-make
228 238
229 # We process the rest of the Makefile if this 239 # We process the rest of the Makefile if this is the final invocation of make
230 240
231 ifeq ($(abs_srctree),$(abs_objtree)) 241 ifeq ($(abs_srctree),$(abs_objtree))
232 # building in the source tree 242 # building in the source tree
233 srctree := . 243 srctree := .
234 building_out_of_srctree := 244 building_out_of_srctree :=
235 else 245 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 246 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237 # building in a subdirectory o 247 # building in a subdirectory of the source tree
238 srctree := .. 248 srctree := ..
239 else 249 else
240 srctree := $(abs_srctree) 250 srctree := $(abs_srctree)
241 endif 251 endif
242 building_out_of_srctree := 1 252 building_out_of_srctree := 1
243 endif 253 endif
244 254
245 ifneq ($(KBUILD_ABS_SRCTREE),) 255 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree) 256 srctree := $(abs_srctree)
247 endif 257 endif
248 258
249 objtree := . 259 objtree := .
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 260 VPATH := $(srctree)
256 endif <<
257 endif <<
258 261
259 export building_out_of_srctree srctree objtree 262 export building_out_of_srctree srctree objtree VPATH
260 263
261 # To make sure we do not include .config for a 264 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 265 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 266 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 267 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 268 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 269 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 270 # of make so .config is not included in this case either (for *config).
268 271
269 version_h := include/generated/uapi/linux/vers 272 version_h := include/generated/uapi/linux/version.h
270 273
271 clean-targets := %clean mrproper cleandocs 274 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 275 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 276 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers 277 $(version_h) headers headers_% archheaders archscripts \
275 %asm-generic kernelve 278 %asm-generic kernelversion %src-pkg dt_binding_check \
276 outputmakefile rustav 279 outputmakefile rustavailable rustfmt rustfmtcheck
277 no-sync-config-targets := $(no-dot-config-targ !! 280 # Installation targets should not require compiler. Unfortunately, vdso_install
>> 281 # is an exception where build artifacts may be updated. This must be fixed.
>> 282 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
>> 283 headers_install modules_install kernelrelease image_name
>> 284 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
278 image_name 285 image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls 286 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/
280 287
281 config-build := 288 config-build :=
282 mixed-build := 289 mixed-build :=
283 need-config := 1 290 need-config := 1
>> 291 need-compiler := 1
284 may-sync-config := 1 292 may-sync-config := 1
285 single-build := 293 single-build :=
286 294
287 ifneq ($(filter $(no-dot-config-targets), $(MA 295 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 296 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 297 need-config :=
290 endif !! 298 endif
291 endif 299 endif
292 300
293 ifneq ($(filter $(no-sync-config-targets), $(M !! 301 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 302 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 303 need-compiler :=
296 endif !! 304 endif
297 endif 305 endif
298 306
299 need-compiler := $(may-sync-config) !! 307 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 308 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 309 may-sync-config :=
>> 310 endif
>> 311 endif
300 312
301 ifneq ($(KBUILD_EXTMOD),) 313 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 314 may-sync-config :=
303 endif 315 endif
304 316
305 ifeq ($(KBUILD_EXTMOD),) 317 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 318 ifneq ($(filter %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 319 config-build := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 320 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 321 mixed-build := 1
>> 322 endif
310 endif 323 endif
311 endif <<
312 endif 324 endif
313 325
314 # We cannot build single targets and the other 326 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO 327 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 single-build := 1 !! 328 single-build := 1
317 ifneq ($(filter-out $(single-targets), $(M !! 329 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318 mixed-build := 1 !! 330 mixed-build := 1
319 endif !! 331 endif
320 endif 332 endif
321 333
322 # For "make -j clean all", "make -j mrproper d 334 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 335 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 336 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 337 mixed-build := 1
326 endif !! 338 endif
327 endif 339 endif
328 340
329 # install and modules_install need also be pro 341 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 342 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 343 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 344 mixed-build := 1
333 endif !! 345 endif
334 endif 346 endif
335 347
336 ifdef mixed-build 348 ifdef mixed-build
337 # ============================================ 349 # ===========================================================================
338 # We're called with mixed targets (*config and 350 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 351 # Handle them one by one.
340 352
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 353 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 354
343 $(MAKECMDGOALS): __build_one_by_one 355 $(MAKECMDGOALS): __build_one_by_one
344 @: 356 @:
345 357
346 __build_one_by_one: 358 __build_one_by_one:
347 $(Q)set -e; \ 359 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 360 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 361 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 362 done
351 363
352 else # !mixed-build 364 else # !mixed-build
353 365
354 include $(srctree)/scripts/Kbuild.include 366 include $(srctree)/scripts/Kbuild.include
355 367
356 # Read KERNELRELEASE from include/config/kerne 368 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf 369 KERNELRELEASE = $(call read-file, include/config/kernel.release)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 370 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 371 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 372
361 include $(srctree)/scripts/subarch.include 373 include $(srctree)/scripts/subarch.include
362 374
363 # Cross compiling and selecting different set 375 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 376 # ---------------------------------------------------------------------------
365 # 377 #
366 # When performing cross compilation for other 378 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 379 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 380 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 381 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 382 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 383 # The default ARCH is the host where make is executed.
372 384
373 # CROSS_COMPILE specify the prefix used for al 385 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 386 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 387 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 388 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 389 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 390 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 391 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 392 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 393 ARCH ?= $(SUBARCH)
382 394
383 # Architecture as present in compile.h 395 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 396 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 397 SRCARCH := $(ARCH)
386 398
387 # Additional ARCH settings for x86 399 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 400 ifeq ($(ARCH),i386)
389 SRCARCH := x86 401 SRCARCH := x86
390 endif 402 endif
391 ifeq ($(ARCH),x86_64) 403 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 404 SRCARCH := x86
393 endif 405 endif
394 406
395 # Additional ARCH settings for sparc 407 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 408 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 409 SRCARCH := sparc
398 endif 410 endif
399 ifeq ($(ARCH),sparc64) 411 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 412 SRCARCH := sparc
401 endif 413 endif
402 414
403 # Additional ARCH settings for parisc 415 # Additional ARCH settings for parisc
404 ifeq ($(ARCH),parisc64) 416 ifeq ($(ARCH),parisc64)
405 SRCARCH := parisc 417 SRCARCH := parisc
406 endif 418 endif
407 419
408 export cross_compiling := 420 export cross_compiling :=
409 ifneq ($(SRCARCH),$(SUBARCH)) 421 ifneq ($(SRCARCH),$(SUBARCH))
410 cross_compiling := 1 422 cross_compiling := 1
411 endif 423 endif
412 424
413 KCONFIG_CONFIG ?= .config 425 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 426 export KCONFIG_CONFIG
415 427
416 # SHELL used by kbuild 428 # SHELL used by kbuild
417 CONFIG_SHELL := sh 429 CONFIG_SHELL := sh
418 430
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 431 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 432 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 433 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 434
423 ifneq ($(LLVM),) 435 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),) 436 ifneq ($(filter %/,$(LLVM)),)
425 LLVM_PREFIX := $(LLVM) 437 LLVM_PREFIX := $(LLVM)
426 else ifneq ($(filter -%,$(LLVM)),) 438 else ifneq ($(filter -%,$(LLVM)),)
427 LLVM_SUFFIX := $(LLVM) 439 LLVM_SUFFIX := $(LLVM)
428 endif 440 endif
429 441
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 442 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 443 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
432 else 444 else
433 HOSTCC = gcc 445 HOSTCC = gcc
434 HOSTCXX = g++ 446 HOSTCXX = g++
435 endif 447 endif
436 HOSTRUSTC = rustc 448 HOSTRUSTC = rustc
437 HOSTPKG_CONFIG = pkg-config 449 HOSTPKG_CONFIG = pkg-config
438 450
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto 451 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440 -O2 -fomit-frame-poin 452 -O2 -fomit-frame-pointer -std=gnu11
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) 453 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) 454 KBUILD_USERLDFLAGS := $(USERLDFLAGS)
443 455
444 # These flags apply to all Rust code in the tr 456 # These flags apply to all Rust code in the tree, including the kernel and
445 # host programs. 457 # host programs.
446 export rust_common_flags := --edition=2021 \ 458 export rust_common_flags := --edition=2021 \
447 -Zbinary_dep_depin 459 -Zbinary_dep_depinfo=y \
448 -Astable_features !! 460 -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \
449 -Dunsafe_op_in_uns !! 461 -Dunreachable_pub -Dnon_ascii_idents \
450 -Dnon_ascii_idents <<
451 -Wrust_2018_idioms <<
452 -Wunreachable_pub <<
453 -Wmissing_docs \ 462 -Wmissing_docs \
454 -Wrustdoc::missing !! 463 -Drustdoc::missing_crate_level_docs \
455 -Wclippy::all \ !! 464 -Dclippy::correctness -Dclippy::style \
456 -Wclippy::mut_mut !! 465 -Dclippy::suspicious -Dclippy::complexity \
457 -Wclippy::needless !! 466 -Dclippy::perf \
458 -Wclippy::needless !! 467 -Dclippy::let_unit_value -Dclippy::mut_mut \
459 -Wclippy::no_mangl !! 468 -Dclippy::needless_bitwise_bool \
>> 469 -Dclippy::needless_continue \
460 -Wclippy::dbg_macr 470 -Wclippy::dbg_macro
461 471
462 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS !! 472 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
463 $(HOSTCFLAGS) -I $(srct !! 473 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF <<
465 -I $(srctree)/scripts/i <<
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - 474 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
467 -Zallow-features= $(HO 475 -Zallow-features= $(HOSTRUSTFLAGS)
468 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(H 476 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 477 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 478
471 # Make variables (CC, etc...) 479 # Make variables (CC, etc...)
472 CPP = $(CC) -E 480 CPP = $(CC) -E
473 ifneq ($(LLVM),) 481 ifneq ($(LLVM),)
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU 482 CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S 483 LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ 484 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ 485 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( 486 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( 487 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
480 READELF = $(LLVM_PREFIX)llvm-readelf$( 488 READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL 489 STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
482 else 490 else
483 CC = $(CROSS_COMPILE)gcc 491 CC = $(CROSS_COMPILE)gcc
484 LD = $(CROSS_COMPILE)ld 492 LD = $(CROSS_COMPILE)ld
485 AR = $(CROSS_COMPILE)ar 493 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 494 NM = $(CROSS_COMPILE)nm
487 OBJCOPY = $(CROSS_COMPILE)objcopy 495 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 496 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf 497 READELF = $(CROSS_COMPILE)readelf
490 STRIP = $(CROSS_COMPILE)strip 498 STRIP = $(CROSS_COMPILE)strip
491 endif 499 endif
492 RUSTC = rustc 500 RUSTC = rustc
493 RUSTDOC = rustdoc 501 RUSTDOC = rustdoc
494 RUSTFMT = rustfmt 502 RUSTFMT = rustfmt
495 CLIPPY_DRIVER = clippy-driver 503 CLIPPY_DRIVER = clippy-driver
496 BINDGEN = bindgen 504 BINDGEN = bindgen
>> 505 CARGO = cargo
497 PAHOLE = pahole 506 PAHOLE = pahole
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve 507 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX = flex 508 LEX = flex
500 YACC = bison 509 YACC = bison
501 AWK = awk 510 AWK = awk
502 INSTALLKERNEL := installkernel 511 INSTALLKERNEL := installkernel
>> 512 DEPMOD = depmod
503 PERL = perl 513 PERL = perl
504 PYTHON3 = python3 514 PYTHON3 = python3
505 CHECK = sparse 515 CHECK = sparse
506 BASH = bash 516 BASH = bash
507 KGZIP = gzip 517 KGZIP = gzip
508 KBZIP2 = bzip2 518 KBZIP2 = bzip2
509 KLZOP = lzop 519 KLZOP = lzop
510 LZMA = lzma 520 LZMA = lzma
511 LZ4 = lz4c 521 LZ4 = lz4c
512 XZ = xz 522 XZ = xz
513 ZSTD = zstd 523 ZSTD = zstd
514 524
>> 525 PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
>> 526
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 527 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 528 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := 529 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE = 530 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = 531 RUSTFLAGS_MODULE =
520 AFLAGS_MODULE = 532 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 533 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 534 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = 535 RUSTFLAGS_KERNEL =
524 AFLAGS_KERNEL = 536 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 537 LDFLAGS_vmlinux =
526 538
527 # Use USERINCLUDE when you must reference the 539 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 540 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 541 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 542 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 543 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 544 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li 545 -include $(srctree)/include/linux/compiler-version.h \
534 -include $(srctree)/include/li 546 -include $(srctree)/include/linux/kconfig.h
535 547
536 # Use LINUXINCLUDE when you must reference the 548 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 549 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 550 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 551 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 552 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree 553 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542 -I$(objtree)/include \ 554 -I$(objtree)/include \
543 $(USERINCLUDE) 555 $(USERINCLUDE)
544 556
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 557 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 558
547 KBUILD_CFLAGS := 559 KBUILD_CFLAGS :=
548 KBUILD_CFLAGS += -std=gnu11 560 KBUILD_CFLAGS += -std=gnu11
549 KBUILD_CFLAGS += -fshort-wchar 561 KBUILD_CFLAGS += -fshort-wchar
550 KBUILD_CFLAGS += -funsigned-char 562 KBUILD_CFLAGS += -funsigned-char
551 KBUILD_CFLAGS += -fno-common 563 KBUILD_CFLAGS += -fno-common
552 KBUILD_CFLAGS += -fno-PIE 564 KBUILD_CFLAGS += -fno-PIE
553 KBUILD_CFLAGS += -fno-strict-aliasing 565 KBUILD_CFLAGS += -fno-strict-aliasing
>> 566 KBUILD_CFLAGS += -Wall
>> 567 KBUILD_CFLAGS += -Wundef
>> 568 KBUILD_CFLAGS += -Werror=implicit-function-declaration
>> 569 KBUILD_CFLAGS += -Werror=implicit-int
>> 570 KBUILD_CFLAGS += -Werror=return-type
>> 571 KBUILD_CFLAGS += -Werror=strict-prototypes
>> 572 KBUILD_CFLAGS += -Wno-format-security
>> 573 KBUILD_CFLAGS += -Wno-trigraphs
554 574
555 KBUILD_CPPFLAGS := -D__KERNEL__ 575 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ 576 KBUILD_RUSTFLAGS := $(rust_common_flags) \
>> 577 --target=$(objtree)/scripts/target.json \
557 -Cpanic=abort -Cembed-bitc 578 -Cpanic=abort -Cembed-bitcode=n -Clto=n \
558 -Cforce-unwind-tables=n -C 579 -Cforce-unwind-tables=n -Ccodegen-units=1 \
559 -Csymbol-mangling-version= 580 -Csymbol-mangling-version=v0 \
560 -Crelocation-model=static 581 -Crelocation-model=static \
561 -Zfunction-sections=n \ 582 -Zfunction-sections=n \
562 -Wclippy::float_arithmetic !! 583 -Dclippy::float_arithmetic
563 584
564 KBUILD_AFLAGS_KERNEL := 585 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 586 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := 587 KBUILD_RUSTFLAGS_KERNEL :=
567 KBUILD_AFLAGS_MODULE := -DMODULE 588 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 589 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE 590 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE
570 KBUILD_LDFLAGS_MODULE := 591 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS := 592 KBUILD_LDFLAGS :=
572 CLANG_FLAGS := 593 CLANG_FLAGS :=
573 594
574 ifeq ($(KBUILD_CLIPPY),1) 595 ifeq ($(KBUILD_CLIPPY),1)
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY 596 RUSTC_OR_CLIPPY_QUIET := CLIPPY
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 597 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
577 else 598 else
578 RUSTC_OR_CLIPPY_QUIET := RUSTC 599 RUSTC_OR_CLIPPY_QUIET := RUSTC
579 RUSTC_OR_CLIPPY = $(RUSTC) 600 RUSTC_OR_CLIPPY = $(RUSTC)
580 endif 601 endif
581 602
582 ifdef RUST_LIB_SRC 603 ifdef RUST_LIB_SRC
583 export RUST_LIB_SRC 604 export RUST_LIB_SRC
584 endif 605 endif
585 606
586 # Allows the usage of unstable features in sta 607 # Allows the usage of unstable features in stable compilers.
587 export RUSTC_BOOTSTRAP := 1 608 export RUSTC_BOOTSTRAP := 1
588 609
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K 610 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q !! 611 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS 612 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF 613 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ 614 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 615 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 616 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 617 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
597 618
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 619 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 620 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF 621 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 622 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU 623 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN 624 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
>> 625 export PAHOLE_FLAGS
604 626
605 # Files to ignore in find ... statements 627 # Files to ignore in find ... statements
606 628
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 629 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 630 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 631 -prune -o
>> 632 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 633 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 634
611 # ============================================ 635 # ===========================================================================
612 # Rules shared between *config targets and bui 636 # Rules shared between *config targets and build targets
613 637
614 # Basic helpers built in scripts/basic/ 638 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic 639 PHONY += scripts_basic
616 scripts_basic: 640 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 641 $(Q)$(MAKE) $(build)=scripts/basic
618 642
619 PHONY += outputmakefile 643 PHONY += outputmakefile
620 ifdef building_out_of_srctree 644 ifdef building_out_of_srctree
621 # Before starting out-of-tree build, make sure 645 # Before starting out-of-tree build, make sure the source tree is clean.
622 # outputmakefile generates a Makefile in the o 646 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 647 # separate output directory. This allows convenient use of make in the
624 # output directory. 648 # output directory.
625 # At the same time when output Makefile genera 649 # At the same time when output Makefile generated, generate .gitignore to
626 # ignore whole output directory 650 # ignore whole output directory
627 651
628 quiet_cmd_makefile = GEN Makefile 652 quiet_cmd_makefile = GEN Makefile
629 cmd_makefile = { \ 653 cmd_makefile = { \
630 echo "\# Automatically generated by $( 654 echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
631 echo "include $(srctree)/Makefile"; \ 655 echo "include $(srctree)/Makefile"; \
632 } > Makefile 656 } > Makefile
633 657
634 outputmakefile: 658 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ 659 @if [ -f $(srctree)/.config -o \
636 -d $(srctree)/include/config 660 -d $(srctree)/include/config -o \
637 -d $(srctree)/arch/$(SRCARCH) 661 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
638 echo >&2 "***"; \ 662 echo >&2 "***"; \
639 echo >&2 "*** The source tree 663 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
640 echo >&2 "*** in $(abs_srctree 664 echo >&2 "*** in $(abs_srctree)";\
641 echo >&2 "***"; \ 665 echo >&2 "***"; \
642 false; \ 666 false; \
643 fi 667 fi
644 $(Q)ln -fsn $(srctree) source 668 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) 669 $(call cmd,makefile)
646 $(Q)test -e .gitignore || \ 670 $(Q)test -e .gitignore || \
647 { echo "# this is build directory, ign 671 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
648 endif 672 endif
649 673
650 # The expansion should be delayed until arch/$ 674 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a 675 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig ( 676 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det 677 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC 678 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
655 679
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), 680 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
657 include $(srctree)/scripts/Makefile.clang 681 include $(srctree)/scripts/Makefile.clang
658 endif 682 endif
659 683
660 # Include this also for config targets because 684 # Include this also for config targets because some architectures need
661 # cc-cross-prefix to determine CROSS_COMPILE. 685 # cc-cross-prefix to determine CROSS_COMPILE.
662 ifdef need-compiler 686 ifdef need-compiler
663 include $(srctree)/scripts/Makefile.compiler 687 include $(srctree)/scripts/Makefile.compiler
664 endif 688 endif
665 689
666 ifdef config-build 690 ifdef config-build
667 # ============================================ 691 # ===========================================================================
668 # *config targets only - make sure prerequisit 692 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 693 # in scripts/kconfig to make the *config target
670 694
671 # Read arch-specific Makefile to set KBUILD_DE !! 695 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 696 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 697 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile 698 include $(srctree)/arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 699 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676 700
677 config: outputmakefile scripts_basic FORCE 701 config: outputmakefile scripts_basic FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 702 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 703
680 %config: outputmakefile scripts_basic FORCE 704 %config: outputmakefile scripts_basic FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 705 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 706
683 else #!config-build 707 else #!config-build
684 # ============================================ 708 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 709 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 710 # targets and others. In general all targets except *config targets.
687 711
688 # If building an external module we do not car 712 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules 713 # but instead __all depend on modules
690 PHONY += all 714 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),) 715 ifeq ($(KBUILD_EXTMOD),)
692 __all: all 716 __all: all
693 else 717 else
694 __all: modules 718 __all: modules
695 endif 719 endif
696 720
697 targets := 721 targets :=
698 722
699 # Decide whether to build built-in, modular, o 723 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in. 724 # Normally, just do built-in.
701 725
702 KBUILD_MODULES := 726 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1 727 KBUILD_BUILTIN := 1
704 728
705 # If we have only "make modules", don't compil 729 # If we have only "make modules", don't compile built-in objects.
706 ifeq ($(MAKECMDGOALS),modules) 730 ifeq ($(MAKECMDGOALS),modules)
707 KBUILD_BUILTIN := 731 KBUILD_BUILTIN :=
708 endif 732 endif
709 733
710 # If we have "make <whatever> modules", compil 734 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway. 735 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module 736 # Just "make" or "make all" shall build modules as well
713 737
714 ifneq ($(filter all modules nsdeps %compile_co 738 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 739 KBUILD_MODULES := 1
716 endif 740 endif
717 741
718 ifeq ($(MAKECMDGOALS),) 742 ifeq ($(MAKECMDGOALS),)
719 KBUILD_MODULES := 1 743 KBUILD_MODULES := 1
720 endif 744 endif
721 745
722 export KBUILD_MODULES KBUILD_BUILTIN 746 export KBUILD_MODULES KBUILD_BUILTIN
723 747
724 ifdef need-config 748 ifdef need-config
725 include include/config/auto.conf 749 include include/config/auto.conf
726 endif 750 endif
727 751
728 ifeq ($(KBUILD_EXTMOD),) 752 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs 753 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y := 754 core-y :=
731 drivers-y := 755 drivers-y :=
732 libs-y := lib/ 756 libs-y := lib/
733 endif # KBUILD_EXTMOD 757 endif # KBUILD_EXTMOD
734 758
735 # The all: target is the default when no targe 759 # The all: target is the default when no target is given on the
736 # command line. 760 # command line.
737 # This allow a user to issue only 'make' to bu 761 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 762 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 763 all: vmlinux
740 764
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover 765 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
742 ifdef CONFIG_CC_IS_GCC 766 ifdef CONFIG_CC_IS_GCC
743 CFLAGS_GCOV += -fno-tree-loop-im 767 CFLAGS_GCOV += -fno-tree-loop-im
744 endif 768 endif
745 export CFLAGS_GCOV 769 export CFLAGS_GCOV
746 770
747 # The arch Makefiles can override CC_FLAGS_FTR 771 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER 772 ifdef CONFIG_FUNCTION_TRACER
749 CC_FLAGS_FTRACE := -pg 773 CC_FLAGS_FTRACE := -pg
750 endif 774 endif
751 775
752 include $(srctree)/arch/$(SRCARCH)/Makefile 776 include $(srctree)/arch/$(SRCARCH)/Makefile
753 777
754 ifdef need-config 778 ifdef need-config
755 ifdef may-sync-config 779 ifdef may-sync-config
756 # Read in dependencies to all Kconfig* files, 780 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include 781 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP 782 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd 783 include include/config/auto.conf.cmd
760 784
761 $(KCONFIG_CONFIG): 785 $(KCONFIG_CONFIG):
762 @echo >&2 '***' 786 @echo >&2 '***'
763 @echo >&2 '*** Configuration file "$@" 787 @echo >&2 '*** Configuration file "$@" not found!'
764 @echo >&2 '***' 788 @echo >&2 '***'
765 @echo >&2 '*** Please run some configu 789 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
766 @echo >&2 '*** "make menuconfig" or "m 790 @echo >&2 '*** "make menuconfig" or "make xconfig").'
767 @echo >&2 '***' 791 @echo >&2 '***'
768 @/bin/false 792 @/bin/false
769 793
770 # The actual configuration files used during t 794 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda 795 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con 796 # include/config/auto.conf (which mirrors .config).
773 # 797 #
774 # This exploits the 'multi-target pattern rule 798 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once 799 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b 800 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
777 # 801 #
778 # Do not use $(call cmd,...) here. That would 802 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
779 # so you cannot notice that Kconfig is waiting 803 # so you cannot notice that Kconfig is waiting for the user input.
780 %/config/auto.conf %/config/auto.conf.cmd %/ge 804 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
781 $(Q)$(kecho) " SYNC $@" 805 $(Q)$(kecho) " SYNC $@"
782 $(Q)$(MAKE) -f $(srctree)/Makefile syn 806 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config 807 else # !may-sync-config
784 # External modules and some install targets ne 808 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care 809 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test 810 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf 811 PHONY += include/config/auto.conf
788 812
789 include/config/auto.conf: 813 include/config/auto.conf:
790 @test -e include/generated/autoconf.h 814 @test -e include/generated/autoconf.h -a -e $@ || ( \
791 echo >&2; 815 echo >&2; \
792 echo >&2 " ERROR: Kernel configuratio 816 echo >&2 " ERROR: Kernel configuration is invalid."; \
793 echo >&2 " include/generated/a 817 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
794 echo >&2 " Run 'make oldconfig 818 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
795 echo >&2 ; 819 echo >&2 ; \
796 /bin/false) 820 /bin/false)
797 821
798 endif # may-sync-config 822 endif # may-sync-config
799 endif # need-config 823 endif # need-config
800 824
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch 825 KBUILD_CFLAGS += -fno-delete-null-pointer-checks
>> 826 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 827 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 828 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 829 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
802 830
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 831 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
804 KBUILD_CFLAGS += -O2 832 KBUILD_CFLAGS += -O2
805 KBUILD_RUSTFLAGS += -Copt-level=2 833 KBUILD_RUSTFLAGS += -Copt-level=2
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 834 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
807 KBUILD_CFLAGS += -Os 835 KBUILD_CFLAGS += -Os
808 KBUILD_RUSTFLAGS += -Copt-level=s 836 KBUILD_RUSTFLAGS += -Copt-level=s
809 endif 837 endif
810 838
811 # Always set `debug-assertions` and `overflow- 839 # Always set `debug-assertions` and `overflow-checks` because their default
812 # depends on `opt-level` and `debug-assertions 840 # depends on `opt-level` and `debug-assertions`, respectively.
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( 841 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C 842 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
815 843
816 # Tell gcc to never replace conditional load w 844 # Tell gcc to never replace conditional load with a non-conditional one
817 ifdef CONFIG_CC_IS_GCC 845 ifdef CONFIG_CC_IS_GCC
818 # gcc-10 renamed --param=allow-store-data-race 846 # gcc-10 renamed --param=allow-store-data-races=0 to
819 # -fno-allow-store-data-races. 847 # -fno-allow-store-data-races.
820 KBUILD_CFLAGS += $(call cc-option,--param=al 848 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 849 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
822 endif 850 endif
823 851
824 ifdef CONFIG_READABLE_ASM 852 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 853 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 854 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 855 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 856 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- 857 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
830 endif 858 endif
831 859
>> 860 ifneq ($(CONFIG_FRAME_WARN),0)
>> 861 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
>> 862 endif
>> 863
832 stackp-flags-y 864 stackp-flags-y := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR) 865 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 866 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
835 867
836 KBUILD_CFLAGS += $(stackp-flags-y) 868 KBUILD_CFLAGS += $(stackp-flags-y)
837 869
>> 870 KBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror
>> 871 KBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y)
>> 872 KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
>> 873
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning 874 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) 875 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
840 876
>> 877 ifdef CONFIG_CC_IS_CLANG
>> 878 # The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable.
>> 879 KBUILD_CFLAGS += -Wno-gnu
>> 880 else
>> 881
>> 882 # gcc inanely warns about local variables called 'main'
>> 883 KBUILD_CFLAGS += -Wno-main
>> 884 endif
>> 885
>> 886 # These warnings generated too much noise in a regular build.
>> 887 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 888 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
>> 889 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
>> 890
>> 891 # These result in bogus false positives
>> 892 KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
>> 893
841 ifdef CONFIG_FRAME_POINTER 894 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 895 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 896 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
844 else 897 else
845 # Some targets (ARM with Thumb2, for example), 898 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 899 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 900 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 901 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 902 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi 903 # In the Rust target specification, "frame-pointer" is set explicitly
851 # to "may-omit". 904 # to "may-omit".
852 ifndef CONFIG_FUNCTION_TRACER 905 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 906 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 907 endif
855 endif 908 endif
856 909
857 # Initialize all stack variables with a 0xAA p 910 # Initialize all stack variables with a 0xAA pattern.
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN 911 ifdef CONFIG_INIT_STACK_ALL_PATTERN
859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 912 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
860 endif 913 endif
861 914
862 # Initialize all stack variables with a zero v 915 # Initialize all stack variables with a zero value.
863 ifdef CONFIG_INIT_STACK_ALL_ZERO 916 ifdef CONFIG_INIT_STACK_ALL_ZERO
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer 917 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 918 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
866 # https://github.com/llvm/llvm-project/issues/ 919 # https://github.com/llvm/llvm-project/issues/44842
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi 920 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER 921 export CC_AUTO_VAR_INIT_ZERO_ENABLER
869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA 922 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER)
870 endif 923 endif
871 endif 924 endif
872 925
873 # While VLAs have been removed, GCC produces u 926 # While VLAs have been removed, GCC produces unreachable stack probes
874 # for the randomize_kstack_offset feature. Dis 927 # for the randomize_kstack_offset feature. Disable it for all compilers.
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac 928 KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
876 929
877 # Clear used registers at func exit (to reduce 930 # Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
878 ifdef CONFIG_ZERO_CALL_USED_REGS 931 ifdef CONFIG_ZERO_CALL_USED_REGS
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- 932 KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr
880 endif 933 endif
881 934
882 ifdef CONFIG_FUNCTION_TRACER 935 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 936 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
884 CC_FLAGS_FTRACE += -mrecord-mcount 937 CC_FLAGS_FTRACE += -mrecord-mcount
885 ifdef CONFIG_HAVE_NOP_MCOUNT 938 ifdef CONFIG_HAVE_NOP_MCOUNT
886 ifeq ($(call cc-option-yn, -mnop-mcount),y 939 ifeq ($(call cc-option-yn, -mnop-mcount),y)
887 CC_FLAGS_FTRACE += -mnop-mcount 940 CC_FLAGS_FTRACE += -mnop-mcount
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 941 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
889 endif 942 endif
890 endif 943 endif
891 endif 944 endif
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 945 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 946 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT
894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 947 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
895 endif 948 endif
896 endif 949 endif
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 950 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
898 ifdef CONFIG_HAVE_C_RECORDMCOUNT 951 ifdef CONFIG_HAVE_C_RECORDMCOUNT
899 BUILD_C_RECORDMCOUNT := y 952 BUILD_C_RECORDMCOUNT := y
900 export BUILD_C_RECORDMCOUNT 953 export BUILD_C_RECORDMCOUNT
901 endif 954 endif
902 endif 955 endif
903 ifdef CONFIG_HAVE_FENTRY 956 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr 957 # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
905 ifeq ($(call cc-option-yn, -mfentry),y) 958 ifeq ($(call cc-option-yn, -mfentry),y)
906 CC_FLAGS_FTRACE += -mfentry 959 CC_FLAGS_FTRACE += -mfentry
907 CC_FLAGS_USING += -DCC_USING_FENTRY 960 CC_FLAGS_USING += -DCC_USING_FENTRY
908 endif 961 endif
909 endif 962 endif
910 export CC_FLAGS_FTRACE 963 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 964 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 965 KBUILD_AFLAGS += $(CC_FLAGS_USING)
913 endif 966 endif
914 967
915 # We trigger additional mismatches with less i 968 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 969 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- 970 KBUILD_CFLAGS += -fno-inline-functions-called-once
918 endif 971 endif
919 972
920 # `rustc`'s `-Zfunction-sections` applies to d 973 # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 974 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 975 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections 976 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
924 LDFLAGS_vmlinux += --gc-sections 977 LDFLAGS_vmlinux += --gc-sections
925 endif 978 endif
926 979
927 ifdef CONFIG_SHADOW_CALL_STACK 980 ifdef CONFIG_SHADOW_CALL_STACK
928 ifndef CONFIG_DYNAMIC_SCS 981 ifndef CONFIG_DYNAMIC_SCS
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac 982 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 983 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
931 endif 984 endif
932 export CC_FLAGS_SCS 985 export CC_FLAGS_SCS
933 endif 986 endif
934 987
935 ifdef CONFIG_LTO_CLANG 988 ifdef CONFIG_LTO_CLANG
936 ifdef CONFIG_LTO_CLANG_THIN 989 ifdef CONFIG_LTO_CLANG_THIN
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 990 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
>> 991 KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
938 else 992 else
939 CC_FLAGS_LTO := -flto 993 CC_FLAGS_LTO := -flto
940 endif 994 endif
941 CC_FLAGS_LTO += -fvisibility=hidden 995 CC_FLAGS_LTO += -fvisibility=hidden
942 996
943 # Limit inlining across translation units to r 997 # Limit inlining across translation units to reduce binary size
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 998 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
>> 999
>> 1000 # Check for frame size exceeding threshold during prolog/epilog insertion
>> 1001 # when using lld < 13.0.0.
>> 1002 ifneq ($(CONFIG_FRAME_WARN),0)
>> 1003 ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y)
>> 1004 KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
>> 1005 endif
>> 1006 endif
945 endif 1007 endif
946 1008
947 ifdef CONFIG_LTO 1009 ifdef CONFIG_LTO
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 1010 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
949 KBUILD_AFLAGS += -fno-lto 1011 KBUILD_AFLAGS += -fno-lto
950 export CC_FLAGS_LTO 1012 export CC_FLAGS_LTO
951 endif 1013 endif
952 1014
953 ifdef CONFIG_CFI_CLANG 1015 ifdef CONFIG_CFI_CLANG
954 CC_FLAGS_CFI := -fsanitize=kcfi 1016 CC_FLAGS_CFI := -fsanitize=kcfi
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 1017 KBUILD_CFLAGS += $(CC_FLAGS_CFI)
956 export CC_FLAGS_CFI 1018 export CC_FLAGS_CFI
957 endif 1019 endif
958 1020
959 # Architectures can define flags to add/remove <<
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN <<
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 <<
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 1021 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)
965 # Set the minimal function alignment. Use the <<
966 # -fmin-function-alignment if it is available, <<
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
970 else <<
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU 1022 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT)
972 endif 1023 endif
973 endif <<
974 1024
975 # arch Makefile may override CC so keep this a 1025 # arch Makefile may override CC so keep this after arch Makefile is included
976 NOSTDINC_FLAGS += -nostdinc 1026 NOSTDINC_FLAGS += -nostdinc
977 1027
>> 1028 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
>> 1029 KBUILD_CFLAGS += -Wvla
>> 1030
>> 1031 # disable pointer signed / unsigned warnings in gcc 4.0
>> 1032 KBUILD_CFLAGS += -Wno-pointer-sign
>> 1033
>> 1034 # In order to make sure new function cast mismatches are not introduced
>> 1035 # in the kernel (to avoid tripping CFI checking), the kernel should be
>> 1036 # globally built with -Wcast-function-type.
>> 1037 KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
>> 1038
978 # To gain proper coverage for CONFIG_UBSAN_BOU 1039 # To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE,
979 # the kernel uses only C99 flexible arrays for 1040 # the kernel uses only C99 flexible arrays for dynamically sized trailing
980 # arrays. Enforce this for everything that may 1041 # arrays. Enforce this for everything that may examine structure sizes and
981 # perform bounds checking. 1042 # perform bounds checking.
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl 1043 KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)
983 1044
984 #Currently, disable -Wstringop-overflow for GC !! 1045 # disable stringop warnings in gcc 8+
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW !! 1046 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + !! 1047
>> 1048 # We'll want to enable this eventually, but it's not going away for 5.7 at least
>> 1049 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
>> 1050
>> 1051 # Another good warning that we'll want to enable eventually
>> 1052 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
>> 1053
>> 1054 # Enabled with W=2, disabled by default as noisy
>> 1055 ifdef CONFIG_CC_IS_GCC
>> 1056 KBUILD_CFLAGS += -Wno-maybe-uninitialized
>> 1057 endif
>> 1058
>> 1059 # The allocators already balk at large sizes, so silence the compiler
>> 1060 # warnings for bounds checks involving those possible values. While
>> 1061 # -Wno-alloc-size-larger-than would normally be used here, earlier versions
>> 1062 # of gcc (<9.1) weirdly don't handle the option correctly when _other_
>> 1063 # warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
>> 1064 # doesn't work (as it is documented to), silently resolving to "0" prior to
>> 1065 # version 9.1 (and producing an error more recently). Numeric values larger
>> 1066 # than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
>> 1067 # ignored, continuing to default to PTRDIFF_MAX. So, left with no other
>> 1068 # choice, we must perform a versioned check to disable this warning.
>> 1069 # https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
>> 1070 KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than
>> 1071 KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
987 1072
988 # disable invalid "can't wrap" optimizations f 1073 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow 1074 KBUILD_CFLAGS += -fno-strict-overflow
990 1075
991 # Make sure -fstack-check isn't enabled (like 1076 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check 1077 KBUILD_CFLAGS += -fno-stack-check
993 1078
994 # conserve stack if available 1079 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC 1080 ifdef CONFIG_CC_IS_GCC
996 KBUILD_CFLAGS += -fconserve-stack 1081 KBUILD_CFLAGS += -fconserve-stack
997 endif 1082 endif
998 1083
>> 1084 # Prohibit date/time macros, which would make the build non-deterministic
>> 1085 KBUILD_CFLAGS += -Werror=date-time
>> 1086
>> 1087 # enforce correct pointer usage
>> 1088 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>> 1089
>> 1090 # Require designated initializers for all marked structures
>> 1091 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
>> 1092
999 # change __FILE__ to the relative path from th 1093 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p 1094 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001 1095
1002 # include additional Makefiles when needed 1096 # include additional Makefiles when needed
1003 include-y := scripts/Ma 1097 include-y := scripts/Makefile.extrawarn
1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma 1098 include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma <<
1006 include-$(CONFIG_KASAN) += scripts/Ma 1099 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
1007 include-$(CONFIG_KCSAN) += scripts/Ma 1100 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
1008 include-$(CONFIG_KMSAN) += scripts/Ma 1101 include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan
1009 include-$(CONFIG_UBSAN) += scripts/Ma 1102 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
1010 include-$(CONFIG_KCOV) += scripts/Ma 1103 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
1011 include-$(CONFIG_RANDSTRUCT) += scripts/Ma 1104 include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct
1012 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma 1105 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
1013 1106
1014 include $(addprefix $(srctree)/, $(include-y) 1107 include $(addprefix $(srctree)/, $(include-y))
1015 1108
1016 # scripts/Makefile.gcc-plugins is intentional 1109 # scripts/Makefile.gcc-plugins is intentionally included last.
1017 # Do not add $(call cc-option,...) below this 1110 # Do not add $(call cc-option,...) below this line. When you build the kernel
1018 # from the clean source tree, the GCC plugins 1111 # from the clean source tree, the GCC plugins do not exist at this point.
1019 1112
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS 1113 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1114 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1022 KBUILD_AFLAGS += $(KAFLAGS) 1115 KBUILD_AFLAGS += $(KAFLAGS)
1023 KBUILD_CFLAGS += $(KCFLAGS) 1116 KBUILD_CFLAGS += $(KCFLAGS)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) 1117 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)
1025 1118
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1119 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1027 LDFLAGS_vmlinux += --build-id=sha1 1120 LDFLAGS_vmlinux += --build-id=sha1
1028 1121
1029 KBUILD_LDFLAGS += -z noexecstack 1122 KBUILD_LDFLAGS += -z noexecstack
1030 ifeq ($(CONFIG_LD_IS_BFD),y) 1123 ifeq ($(CONFIG_LD_IS_BFD),y)
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn 1124 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
1032 endif 1125 endif
1033 1126
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1127 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X 1128 LDFLAGS_vmlinux += -X
1036 endif 1129 endif
1037 1130
1038 ifeq ($(CONFIG_RELR),y) 1131 ifeq ($(CONFIG_RELR),y)
1039 # ld.lld before 15 did not support -z pack-re 1132 # ld.lld before 15 did not support -z pack-relative-relocs.
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy 1133 LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs)
1041 endif 1134 endif
1042 1135
1043 # We never want expected sections to be place 1136 # We never want expected sections to be placed heuristically by the
1044 # linker. All sections should be explicitly n 1137 # linker. All sections should be explicitly named in the linker script.
1045 ifdef CONFIG_LD_ORPHAN_WARN 1138 ifdef CONFIG_LD_ORPHAN_WARN
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG 1139 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
1047 endif 1140 endif
1048 1141
1049 # Align the bit size of userspace programs wi 1142 # Align the bit size of userspace programs with the kernel
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta 1143 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta 1144 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1052 1145
1053 # make the checker run with the right archite 1146 # make the checker run with the right architecture
1054 CHECKFLAGS += --arch=$(ARCH) 1147 CHECKFLAGS += --arch=$(ARCH)
1055 1148
1056 # insure the checker run with the right endia 1149 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 1150 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058 1151
1059 # the checker needs the correct machine size 1152 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1153 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061 1154
1062 # Default kernel image to build when no speci 1155 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 1156 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 1157 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 1158 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 1159 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 1160 export KBUILD_IMAGE ?= vmlinux
1068 1161
1069 # 1162 #
1070 # INSTALL_PATH specifies where to place the u 1163 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 1164 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 1165 export INSTALL_PATH ?= /boot
1073 1166
1074 # 1167 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 1168 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 1169 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 1170 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 1171 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 1172 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 1173
1081 # 1174 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 1175 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 1176 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 1177 # makefile but the argument can be passed to make if needed.
1085 # 1178 #
1086 1179
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 1180 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 1181 export MODLIB
1089 1182
1090 PHONY += prepare0 1183 PHONY += prepare0
1091 1184
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), 1185 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1093 export MODORDER := $(extmod_prefix)modules.or 1186 export MODORDER := $(extmod_prefix)modules.order
1094 export MODULES_NSDEPS := $(extmod_prefix)modu 1187 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1095 1188
1096 ifeq ($(KBUILD_EXTMOD),) 1189 ifeq ($(KBUILD_EXTMOD),)
1097 1190
1098 build-dir := . 1191 build-dir := .
1099 clean-dirs := $(sort . Documentation \ 1192 clean-dirs := $(sort . Documentation \
1100 $(patsubst %/,%,$(filter 1193 $(patsubst %/,%,$(filter %/, $(core-) \
1101 $(drivers-) $(libs-)) 1194 $(drivers-) $(libs-))))
1102 1195
1103 export ARCH_CORE := $(core-y) 1196 export ARCH_CORE := $(core-y)
1104 export ARCH_LIB := $(filter %/, $(lib 1197 export ARCH_LIB := $(filter %/, $(libs-y))
1105 export ARCH_DRIVERS := $(drivers-y) $(dri 1198 export ARCH_DRIVERS := $(drivers-y) $(drivers-m)
1106 # Externally visible symbols (used by link-vm 1199 # Externally visible symbols (used by link-vmlinux.sh)
1107 1200
1108 KBUILD_VMLINUX_OBJS := ./built-in.a 1201 KBUILD_VMLINUX_OBJS := ./built-in.a
1109 ifdef CONFIG_MODULES 1202 ifdef CONFIG_MODULES
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a 1203 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib 1204 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1112 else 1205 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, 1206 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1114 endif 1207 endif
1115 1208
1116 export KBUILD_VMLINUX_LIBS 1209 export KBUILD_VMLINUX_LIBS
1117 export KBUILD_LDS := arch/$(SRCARCH) 1210 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1118 1211
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1212 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the 1213 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi 1214 # we have to build modules as well to determine what those symbols are.
1122 KBUILD_MODULES := 1 1215 KBUILD_MODULES := 1
1123 endif 1216 endif
1124 1217
1125 # '$(AR) mPi' needs 'T' to workaround the bug 1218 # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
1126 quiet_cmd_ar_vmlinux.a = AR $@ 1219 quiet_cmd_ar_vmlinux.a = AR $@
1127 cmd_ar_vmlinux.a = \ 1220 cmd_ar_vmlinux.a = \
1128 rm -f $@; \ 1221 rm -f $@; \
1129 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS 1222 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
1130 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) 1223 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
1131 1224
1132 targets += vmlinux.a 1225 targets += vmlinux.a
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea 1226 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
1134 $(call if_changed,ar_vmlinux.a) 1227 $(call if_changed,ar_vmlinux.a)
1135 1228
1136 PHONY += vmlinux_o 1229 PHONY += vmlinux_o
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 1230 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)
1138 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1231 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o
1139 1232
1140 vmlinux.o modules.builtin.modinfo modules.bui 1233 vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
1141 @: 1234 @:
1142 1235
1143 PHONY += vmlinux 1236 PHONY += vmlinux
1144 # LDFLAGS_vmlinux in the top Makefile defines 1237 # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux,
1145 # not for decompressors. LDFLAGS_vmlinux in a 1238 # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is
1146 # unrelated; the decompressors just happen to 1239 # unrelated; the decompressors just happen to have the same base name,
1147 # arch/*/boot/compressed/vmlinux. 1240 # arch/*/boot/compressed/vmlinux.
1148 # Export LDFLAGS_vmlinux only to scripts/Make 1241 # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux.
1149 # 1242 #
1150 # _LDFLAGS_vmlinux is a workaround for the 'p 1243 # _LDFLAGS_vmlinux is a workaround for the 'private export' bug:
1151 # https://savannah.gnu.org/bugs/?61463 1244 # https://savannah.gnu.org/bugs/?61463
1152 # For Make > 4.4, the following simple code w 1245 # For Make > 4.4, the following simple code will work:
1153 # vmlinux: private export LDFLAGS_vmlinux := 1246 # vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG 1247 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ 1248 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux)
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost 1249 vmlinux: vmlinux.o $(KBUILD_LDS) modpost
1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1250 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
1158 1251
1159 # The actual objects are generated when desce 1252 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1253 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ 1254 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ;
1162 1255
1163 ifeq ($(origin KERNELRELEASE),file) 1256 ifeq ($(origin KERNELRELEASE),file)
1164 filechk_kernel.release = $(srctree)/scripts/s 1257 filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree)
1165 else 1258 else
1166 filechk_kernel.release = echo $(KERNELRELEASE 1259 filechk_kernel.release = echo $(KERNELRELEASE)
1167 endif 1260 endif
1168 1261
1169 # Store (new) KERNELRELEASE string in include 1262 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE 1263 include/config/kernel.release: FORCE
1171 $(call filechk,kernel.release) 1264 $(call filechk,kernel.release)
1172 1265
1173 # Additional helpers built in scripts/ 1266 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr 1267 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel 1268 # in parallel
1176 PHONY += scripts 1269 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc 1270 scripts: scripts_basic scripts_dtc
1178 $(Q)$(MAKE) $(build)=$(@) 1271 $(Q)$(MAKE) $(build)=$(@)
1179 1272
1180 # Things we need to do before we recursively 1273 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1274 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1275 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1276 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1277 # version.h and scripts_basic is processed / created.
1185 1278
1186 PHONY += prepare archprepare 1279 PHONY += prepare archprepare
1187 1280
1188 archprepare: outputmakefile archheaders archs 1281 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1189 asm-generic $(version_h) include/gene 1282 asm-generic $(version_h) include/generated/utsrelease.h \
1190 include/generated/compile.h include/g 1283 include/generated/compile.h include/generated/autoconf.h remove-stale-files
1191 1284
1192 prepare0: archprepare 1285 prepare0: archprepare
1193 $(Q)$(MAKE) $(build)=scripts/mod 1286 $(Q)$(MAKE) $(build)=scripts/mod
1194 $(Q)$(MAKE) $(build)=. prepare 1287 $(Q)$(MAKE) $(build)=. prepare
1195 1288
1196 # All the preparing.. 1289 # All the preparing..
1197 prepare: prepare0 1290 prepare: prepare0
1198 ifdef CONFIG_RUST 1291 ifdef CONFIG_RUST
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip !! 1292 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh
1200 $(Q)$(MAKE) $(build)=rust 1293 $(Q)$(MAKE) $(build)=rust
1201 endif 1294 endif
1202 1295
1203 PHONY += remove-stale-files 1296 PHONY += remove-stale-files
1204 remove-stale-files: 1297 remove-stale-files:
1205 $(Q)$(srctree)/scripts/remove-stale-f 1298 $(Q)$(srctree)/scripts/remove-stale-files
1206 1299
1207 # Support for using generic headers in asm-ge 1300 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1301 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209 1302
1210 PHONY += asm-generic uapi-asm-generic 1303 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic 1304 asm-generic: uapi-asm-generic
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1305 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1213 generic=include/asm-generic 1306 generic=include/asm-generic
1214 uapi-asm-generic: 1307 uapi-asm-generic:
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1308 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1216 generic=include/uapi/asm-generic 1309 generic=include/uapi/asm-generic
1217 1310
1218 # Generate some files 1311 # Generate some files
1219 # ------------------------------------------- 1312 # ---------------------------------------------------------------------------
1220 1313
1221 # KERNELRELEASE can change from a few differe 1314 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1315 # needs to be updated, so this check is forced on all builds
1223 1316
1224 uts_len := 64 1317 uts_len := 64
1225 define filechk_utsrelease.h 1318 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1319 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1320 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1321 exit 1; \
1229 fi; 1322 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR 1323 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef 1324 endef
1232 1325
1233 define filechk_version.h 1326 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then 1327 if [ $(SUBLEVEL) -gt 255 ]; then \
1235 echo \#define LINUX_VERSION_C 1328 echo \#define LINUX_VERSION_CODE $(shell \
1236 expr $(VERSION) \* 65536 + $( 1329 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1237 else 1330 else \
1238 echo \#define LINUX_VERSION_C 1331 echo \#define LINUX_VERSION_CODE $(shell \
1239 expr $(VERSION) \* 65536 + $( 1332 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1240 fi; 1333 fi; \
1241 echo '#define KERNEL_VERSION(a,b,c) ( 1334 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
1242 ((c) > 255 ? 255 : (c)))'; 1335 ((c) > 255 ? 255 : (c)))'; \
1243 echo \#define LINUX_VERSION_MAJOR $(V 1336 echo \#define LINUX_VERSION_MAJOR $(VERSION); \
1244 echo \#define LINUX_VERSION_PATCHLEVE 1337 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
1245 echo \#define LINUX_VERSION_SUBLEVEL 1338 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1246 endef 1339 endef
1247 1340
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1341 $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
1249 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1342 $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
1250 $(version_h): FORCE 1343 $(version_h): FORCE
1251 $(call filechk,version.h) 1344 $(call filechk,version.h)
1252 1345
1253 include/generated/utsrelease.h: include/confi 1346 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1347 $(call filechk,utsrelease.h)
1255 1348
1256 filechk_compile.h = $(srctree)/scripts/mkcomp 1349 filechk_compile.h = $(srctree)/scripts/mkcompile_h \
1257 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION 1350 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)"
1258 1351
1259 include/generated/compile.h: FORCE 1352 include/generated/compile.h: FORCE
1260 $(call filechk,compile.h) 1353 $(call filechk,compile.h)
1261 1354
1262 PHONY += headerdep 1355 PHONY += headerdep
1263 headerdep: 1356 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1357 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1358 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1359
1267 # ------------------------------------------- 1360 # ---------------------------------------------------------------------------
1268 # Kernel headers 1361 # Kernel headers
1269 1362
1270 #Default location for installed headers 1363 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1364 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1365
1273 quiet_cmd_headers_install = INSTALL $(INSTALL 1366 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1274 cmd_headers_install = \ 1367 cmd_headers_install = \
1275 mkdir -p $(INSTALL_HDR_PATH); \ 1368 mkdir -p $(INSTALL_HDR_PATH); \
1276 rsync -mrl --include='*/' --include=' 1369 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1277 usr/include $(INSTALL_HDR_PATH) 1370 usr/include $(INSTALL_HDR_PATH)
1278 1371
1279 PHONY += headers_install 1372 PHONY += headers_install
1280 headers_install: headers 1373 headers_install: headers
1281 $(call cmd,headers_install) 1374 $(call cmd,headers_install)
1282 1375
1283 PHONY += archheaders archscripts 1376 PHONY += archheaders archscripts
1284 1377
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he 1378 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1286 1379
1287 PHONY += headers 1380 PHONY += headers
1288 headers: $(version_h) scripts_unifdef uapi-as 1381 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1289 $(if $(filter um, $(SRCARCH)), $(erro 1382 $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1383 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1384 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1292 1385
1293 ifdef CONFIG_HEADERS_INSTALL 1386 ifdef CONFIG_HEADERS_INSTALL
1294 prepare: headers 1387 prepare: headers
1295 endif 1388 endif
1296 1389
1297 PHONY += scripts_unifdef 1390 PHONY += scripts_unifdef
1298 scripts_unifdef: scripts_basic 1391 scripts_unifdef: scripts_basic
1299 $(Q)$(MAKE) $(build)=scripts scripts/ 1392 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1300 1393
1301 # ------------------------------------------- 1394 # ---------------------------------------------------------------------------
1302 # Install 1395 # Install
1303 1396
1304 # Many distributions have the custom install 1397 # Many distributions have the custom install script, /sbin/installkernel.
1305 # If DKMS is installed, 'make install' will e 1398 # If DKMS is installed, 'make install' will eventually recurse back
1306 # to this Makefile to build and install exter 1399 # to this Makefile to build and install external modules.
1307 # Cancel sub_make_done so that options such a 1400 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1308 1401
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) 1402 quiet_cmd_install = INSTALL $(INSTALL_PATH)
1310 cmd_install = unset sub_make_done; $(sr 1403 cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
1311 1404
1312 # ------------------------------------------- 1405 # ---------------------------------------------------------------------------
1313 # vDSO install <<
1314 <<
1315 PHONY += vdso_install <<
1316 vdso_install: export INSTALL_FILES = $(vdso-i <<
1317 vdso_install: <<
1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1319 <<
1320 # ------------------------------------------- <<
1321 # Tools 1406 # Tools
1322 1407
1323 ifdef CONFIG_OBJTOOL 1408 ifdef CONFIG_OBJTOOL
1324 prepare: tools/objtool 1409 prepare: tools/objtool
1325 endif 1410 endif
1326 1411
1327 ifdef CONFIG_BPF 1412 ifdef CONFIG_BPF
1328 ifdef CONFIG_DEBUG_INFO_BTF 1413 ifdef CONFIG_DEBUG_INFO_BTF
1329 prepare: tools/bpf/resolve_btfids 1414 prepare: tools/bpf/resolve_btfids
1330 endif 1415 endif
1331 endif 1416 endif
1332 1417
1333 # The tools build system is not a part of Kbu <<
1334 # its own unique issues. If you need to integ <<
1335 # please consider locating that tool outside <<
1336 # standard Kbuild "hostprogs" syntax instead <<
1337 # here. See Documentation/kbuild/makefiles.rs <<
1338 <<
1339 PHONY += resolve_btfids_clean 1418 PHONY += resolve_btfids_clean
1340 1419
1341 resolve_btfids_O = $(abspath $(objtree))/tool 1420 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1342 1421
1343 # tools/bpf/resolve_btfids directory might no 1422 # tools/bpf/resolve_btfids directory might not exist
1344 # in output directory, skip its clean in that 1423 # in output directory, skip its clean in that case
1345 resolve_btfids_clean: 1424 resolve_btfids_clean:
1346 ifneq ($(wildcard $(resolve_btfids_O)),) 1425 ifneq ($(wildcard $(resolve_btfids_O)),)
1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ 1426 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1348 endif 1427 endif
1349 1428
1350 # Clear a bunch of variables before executing 1429 # Clear a bunch of variables before executing the submake
1351 ifeq ($(quiet),silent_) 1430 ifeq ($(quiet),silent_)
1352 tools_silent=s 1431 tools_silent=s
1353 endif 1432 endif
1354 1433
1355 tools/: FORCE 1434 tools/: FORCE
1356 $(Q)mkdir -p $(objtree)/tools 1435 $(Q)mkdir -p $(objtree)/tools
1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1436 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1358 1437
1359 tools/%: FORCE 1438 tools/%: FORCE
1360 $(Q)mkdir -p $(objtree)/tools 1439 $(Q)mkdir -p $(objtree)/tools
1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1440 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1362 1441
1363 # ------------------------------------------- 1442 # ---------------------------------------------------------------------------
1364 # Kernel selftest 1443 # Kernel selftest
1365 1444
1366 PHONY += kselftest 1445 PHONY += kselftest
1367 kselftest: headers 1446 kselftest: headers
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1447 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369 1448
1370 kselftest-%: headers FORCE 1449 kselftest-%: headers FORCE
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi 1450 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1372 1451
1373 PHONY += kselftest-merge 1452 PHONY += kselftest-merge
1374 kselftest-merge: 1453 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1454 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1455 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1377 xargs $(srctree)/scripts/kcon !! 1456 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1457 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379 1458
1380 # ------------------------------------------- 1459 # ---------------------------------------------------------------------------
1381 # Devicetree files 1460 # Devicetree files
1382 1461
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1462 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts 1463 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif 1464 endif
1386 1465
1387 ifneq ($(dtstree),) 1466 ifneq ($(dtstree),)
1388 1467
1389 %.dtb: dtbs_prepare 1468 %.dtb: dtbs_prepare
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1469 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1391 1470
1392 %.dtbo: dtbs_prepare 1471 %.dtbo: dtbs_prepare
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1472 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394 1473
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ 1474 PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
1396 dtbs: dtbs_prepare 1475 dtbs: dtbs_prepare
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1476 $(Q)$(MAKE) $(build)=$(dtstree)
1398 1477
1399 # include/config/kernel.release is actually n 1478 # include/config/kernel.release is actually needed when installing DTBs because
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) 1479 # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
1401 # dtbs_install depend on it as dtbs_install m 1480 # dtbs_install depend on it as dtbs_install may run as root.
1402 dtbs_prepare: include/config/kernel.release s 1481 dtbs_prepare: include/config/kernel.release scripts_dtc
1403 1482
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1483 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1405 export CHECK_DTBS=y 1484 export CHECK_DTBS=y
1406 endif 1485 endif
1407 1486
1408 ifneq ($(CHECK_DTBS),) 1487 ifneq ($(CHECK_DTBS),)
1409 dtbs_prepare: dt_binding_schemas !! 1488 dtbs_prepare: dt_binding_check
1410 endif 1489 endif
1411 1490
1412 dtbs_check: dtbs 1491 dtbs_check: dtbs
1413 1492
1414 dtbs_install: 1493 dtbs_install:
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1494 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1416 1495
1417 ifdef CONFIG_OF_EARLY_FLATTREE 1496 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs 1497 all: dtbs
1419 endif 1498 endif
1420 1499
1421 endif 1500 endif
1422 1501
1423 PHONY += scripts_dtc 1502 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic 1503 scripts_dtc: scripts_basic
1425 $(Q)$(MAKE) $(build)=scripts/dtc 1504 $(Q)$(MAKE) $(build)=scripts/dtc
1426 1505
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO 1506 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1428 export CHECK_DTBS=y !! 1507 export CHECK_DT_BINDING=y
1429 endif 1508 endif
1430 1509
1431 PHONY += dt_binding_check dt_binding_schemas !! 1510 PHONY += dt_binding_check
1432 dt_binding_check: dt_binding_schemas scripts_ !! 1511 dt_binding_check: scripts_dtc
1433 $(Q)$(MAKE) $(build)=Documentation/de <<
1434 <<
1435 dt_binding_schemas: <<
1436 $(Q)$(MAKE) $(build)=Documentation/de 1512 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437 1513
1438 PHONY += dt_compatible_check 1514 PHONY += dt_compatible_check
1439 dt_compatible_check: dt_binding_schemas !! 1515 dt_compatible_check: dt_binding_check
1440 $(Q)$(MAKE) $(build)=Documentation/de 1516 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@
1441 1517
1442 # ------------------------------------------- 1518 # ---------------------------------------------------------------------------
1443 # Modules 1519 # Modules
1444 1520
1445 ifdef CONFIG_MODULES 1521 ifdef CONFIG_MODULES
1446 1522
1447 # By default, build modules as well 1523 # By default, build modules as well
1448 1524
1449 all: modules 1525 all: modules
1450 1526
1451 # When we're building modules with modversion 1527 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as 1528 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo 1529 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS 1530 ifdef CONFIG_MODVERSIONS
1455 KBUILD_BUILTIN := 1 1531 KBUILD_BUILTIN := 1
1456 endif 1532 endif
1457 1533
1458 # Build modules 1534 # Build modules
1459 # 1535 #
1460 1536
1461 # *.ko are usually independent of vmlinux, bu 1537 # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES
1462 # is an exception. 1538 # is an exception.
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES 1539 ifdef CONFIG_DEBUG_INFO_BTF_MODULES
1464 KBUILD_BUILTIN := 1 1540 KBUILD_BUILTIN := 1
1465 modules: vmlinux 1541 modules: vmlinux
1466 endif 1542 endif
1467 1543
1468 modules: modules_prepare 1544 modules: modules_prepare
1469 1545
1470 # Target to prepare building external modules 1546 # Target to prepare building external modules
1471 modules_prepare: prepare 1547 modules_prepare: prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ 1548 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1473 1549
>> 1550 export modules_sign_only :=
>> 1551
>> 1552 ifeq ($(CONFIG_MODULE_SIG),y)
>> 1553 PHONY += modules_sign
>> 1554 modules_sign: modules_install
>> 1555 @:
>> 1556
>> 1557 # modules_sign is a subset of modules_install.
>> 1558 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
>> 1559 ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1560 modules_sign_only := y
>> 1561 endif
>> 1562 endif
>> 1563
1474 endif # CONFIG_MODULES 1564 endif # CONFIG_MODULES
1475 1565
>> 1566 modinst_pre :=
>> 1567 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1568 modinst_pre := __modinst_pre
>> 1569 endif
>> 1570
>> 1571 modules_install: $(modinst_pre)
>> 1572 PHONY += __modinst_pre
>> 1573 __modinst_pre:
>> 1574 @rm -rf $(MODLIB)/kernel
>> 1575 @rm -f $(MODLIB)/source
>> 1576 @mkdir -p $(MODLIB)
>> 1577 ifdef CONFIG_MODULES
>> 1578 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1579 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1580 rm -f $(MODLIB)/build ; \
>> 1581 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1582 fi
>> 1583 @sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order
>> 1584 endif
>> 1585 @cp -f modules.builtin $(MODLIB)/
>> 1586 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
>> 1587
1476 ### 1588 ###
1477 # Cleaning is done on three levels. 1589 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1590 # make clean Delete most generated files
1479 # Leave enough to build extern 1591 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1592 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1593 # make distclean Remove editor backup files, patch leftover files and the like
1482 1594
1483 # Directories & files removed with 'make clea 1595 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1596 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
1485 modules.builtin modules.builti 1597 modules.builtin modules.builtin.modinfo modules.nsdeps \
1486 compile_commands.json rust/tes !! 1598 compile_commands.json .thinlto-cache rust/test \
1487 rust-project.json .vmlinux.obj 1599 rust-project.json .vmlinux.objs .vmlinux.export.c
1488 1600
1489 # Directories & files removed with 'make mrpr 1601 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene 1602 MRPROPER_FILES += include/config include/generated \
1491 arch/$(SRCARCH)/include/gen 1603 arch/$(SRCARCH)/include/generated .objdiff \
1492 debian snap tar-install PKG !! 1604 debian snap tar-install \
1493 .config .config.old .versio 1605 .config .config.old .version \
1494 Module.symvers \ 1606 Module.symvers \
1495 certs/signing_key.pem \ 1607 certs/signing_key.pem \
1496 certs/x509.genkey \ 1608 certs/x509.genkey \
1497 vmlinux-gdb.py \ 1609 vmlinux-gdb.py \
1498 rpmbuild \ !! 1610 *.spec rpmbuild \
1499 rust/libmacros.so 1611 rust/libmacros.so
1500 1612
1501 # clean - Delete most, but leave enough to bu 1613 # clean - Delete most, but leave enough to build external modules
1502 # 1614 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1615 clean: rm-files := $(CLEAN_FILES)
1504 1616
1505 PHONY += archclean vmlinuxclean 1617 PHONY += archclean vmlinuxclean
1506 1618
1507 vmlinuxclean: 1619 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1620 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1621 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1622
1511 clean: archclean vmlinuxclean resolve_btfids_ 1623 clean: archclean vmlinuxclean resolve_btfids_clean
1512 1624
1513 # mrproper - Delete all generated files, incl 1625 # mrproper - Delete all generated files, including .config
1514 # 1626 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1627 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs := $(addprefix _mrproper_, 1628 mrproper-dirs := $(addprefix _mrproper_,scripts)
1517 1629
1518 PHONY += $(mrproper-dirs) mrproper 1630 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs): 1631 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1632 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1633
1522 mrproper: clean $(mrproper-dirs) 1634 mrproper: clean $(mrproper-dirs)
1523 $(call cmd,rmfiles) 1635 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ 1636 @find . $(RCS_FIND_IGNORE) \
1525 \( -name '*.rmeta' \) \ 1637 \( -name '*.rmeta' \) \
1526 -type f -print | xargs rm -f 1638 -type f -print | xargs rm -f
1527 1639
1528 # distclean 1640 # distclean
1529 # 1641 #
1530 PHONY += distclean 1642 PHONY += distclean
1531 1643
1532 distclean: mrproper 1644 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ 1645 @find . $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1646 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* 1647 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536 -o -name 'core' -o -name tags 1648 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1537 -o -name GPATH -o -name GRTAG 1649 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
1538 -type f -print | xargs rm -f 1650 -type f -print | xargs rm -f
1539 1651
1540 1652
1541 # Packaging of the kernel to various formats 1653 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1654 # ---------------------------------------------------------------------------
1543 1655
1544 %src-pkg: FORCE 1656 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1657 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1546 %pkg: include/config/kernel.release FORCE 1658 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1659 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1548 1660
1549 # Brief documentation of the typical targets 1661 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1662 # ---------------------------------------------------------------------------
1551 1663
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1664 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1665 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1666 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1667 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1668
1557 PHONY += help 1669 PHONY += help
1558 help: 1670 help:
1559 @echo 'Cleaning targets:' 1671 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1672 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1673 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1674 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1675 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1676 @echo ''
>> 1677 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1678 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1679 @echo ''
1567 @echo 'Other generic targets:' 1680 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1681 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1682 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1683 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1684 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 1685 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1686 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1687 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1688 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1689 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1690 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1691 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1692 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1693 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1694 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1695 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1696 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1697 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1698 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1699 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1700 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1701 echo ''
1590 @echo 'Static analysers:' 1702 @echo 'Static analysers:'
1591 @echo ' checkstack - Generate !! 1703 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st <<
1593 @echo ' versioncheck - Sanity ch 1704 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1705 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1706 @echo ' export_report - List the usages of all exported symbols'
1596 @echo ' headerdep - Detect in 1707 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit 1708 @echo ' coccicheck - Check with Coccinelle'
1598 @echo ' clang-analyzer - Check wit 1709 @echo ' clang-analyzer - Check with clang static analyzer'
1599 @echo ' clang-tidy - Check wit 1710 @echo ' clang-tidy - Check with clang-tidy'
1600 @echo '' 1711 @echo ''
1601 @echo 'Tools:' 1712 @echo 'Tools:'
1602 @echo ' nsdeps - Generate 1713 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1603 @echo '' 1714 @echo ''
1604 @echo 'Kernel selftest:' 1715 @echo 'Kernel selftest:'
1605 @echo ' kselftest - Build a 1716 @echo ' kselftest - Build and run kernel selftest'
1606 @echo ' Build, 1717 @echo ' Build, install, and boot kernel before'
1607 @echo ' running 1718 @echo ' running kselftest on it'
1608 @echo ' Run as 1719 @echo ' Run as root for full coverage'
1609 @echo ' kselftest-all - Build k 1720 @echo ' kselftest-all - Build kernel selftest'
1610 @echo ' kselftest-install - Build a 1721 @echo ' kselftest-install - Build and install kernel selftest'
1611 @echo ' kselftest-clean - Remove 1722 @echo ' kselftest-clean - Remove all generated kselftest files'
1612 @echo ' kselftest-merge - Merge a 1723 @echo ' kselftest-merge - Merge all the config dependencies of'
1613 @echo ' kselfte 1724 @echo ' kselftest to existing .config.'
1614 @echo '' 1725 @echo ''
1615 @echo 'Rust targets:' 1726 @echo 'Rust targets:'
1616 @echo ' rustavailable - Checks wh 1727 @echo ' rustavailable - Checks whether the Rust toolchain is'
1617 @echo ' available 1728 @echo ' available and, if not, explains why.'
1618 @echo ' rustfmt - Reformat 1729 @echo ' rustfmt - Reformat all the Rust code in the kernel'
1619 @echo ' rustfmtcheck - Checks if 1730 @echo ' rustfmtcheck - Checks if all the Rust code in the kernel'
1620 @echo ' is format 1731 @echo ' is formatted, printing a diff otherwise.'
1621 @echo ' rustdoc - Generate 1732 @echo ' rustdoc - Generate Rust documentation'
1622 @echo ' (requires 1733 @echo ' (requires kernel .config)'
1623 @echo ' rusttest - Runs the 1734 @echo ' rusttest - Runs the Rust tests'
1624 @echo ' (requires 1735 @echo ' (requires kernel .config; downloads external repos)'
1625 @echo ' rust-analyzer - Generate 1736 @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file'
1626 @echo ' (requires 1737 @echo ' (requires kernel .config)'
1627 @echo ' dir/file.[os] - Build spe 1738 @echo ' dir/file.[os] - Build specified target only'
1628 @echo ' dir/file.rsi - Build mac 1739 @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.'
1629 @echo ' Run with 1740 @echo ' Run with RUSTFMT=n to skip reformatting if needed.'
1630 @echo ' The outpu 1741 @echo ' The output is not intended to be compilable.'
1631 @echo ' dir/file.ll - Build the 1742 @echo ' dir/file.ll - Build the LLVM assembly file'
1632 @echo '' 1743 @echo ''
1633 @$(if $(dtstree), \ 1744 @$(if $(dtstree), \
1634 echo 'Devicetree:'; \ 1745 echo 'Devicetree:'; \
1635 echo '* dtbs - !! 1746 echo '* dtbs - Build device tree blobs for enabled boards'; \
1636 echo ' dtbs_install - !! 1747 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637 echo ' dt_binding_check - !! 1748 echo ' dt_binding_check - Validate device tree binding documents'; \
1638 echo ' dt_binding_schema - !! 1749 echo ' dtbs_check - Validate device tree source files';\
1639 echo ' dtbs_check - <<
1640 echo '') 1750 echo '')
1641 1751
1642 @echo 'Userspace tools targets:' 1752 @echo 'Userspace tools targets:'
1643 @echo ' use "make tools/help"' 1753 @echo ' use "make tools/help"'
1644 @echo ' or "cd tools; make help"' 1754 @echo ' or "cd tools; make help"'
1645 @echo '' 1755 @echo ''
1646 @echo 'Kernel packaging:' 1756 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi 1757 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1648 @echo '' 1758 @echo ''
1649 @echo 'Documentation targets:' 1759 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ 1760 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651 @echo '' 1761 @echo ''
1652 @echo 'Architecture-specific targets !! 1762 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ 1763 @$(or $(archhelp),\
1654 echo ' No architecture-speci !! 1764 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1765 @echo ''
1656 @$(if $(boards), \ 1766 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1767 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % 1768 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1769 echo '')
1660 @$(if $(board-dirs), \ 1770 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1771 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1772 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1773 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1774 echo '')
1665 1775
1666 @echo ' make V=n [targets] 1: ver 1776 @echo ' make V=n [targets] 1: verbose build'
1667 @echo ' 2: giv 1777 @echo ' 2: give reason for rebuild of target'
1668 @echo ' V=1 an 1778 @echo ' V=1 and V=2 can be combined with V=12'
1669 @echo ' make O=dir [targets] Locate 1779 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check 1780 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1671 @echo ' (spars 1781 @echo ' (sparse by default)'
1672 @echo ' make C=2 [targets] Force 1782 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1783 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1784 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1785 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1786 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1787 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a 1788 @echo ' e: warnings are being treated as errors'
1680 @echo ' Multiple leve 1789 @echo ' Multiple levels can be combined with W=12 or W=123'
1681 @$(if $(dtstree), \ 1790 @$(if $(dtstree), \
1682 echo ' make CHECK_DTBS=1 [ta 1791 echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \
1683 echo ' This can be ap 1792 echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \
1684 ) 1793 )
1685 @echo '' 1794 @echo ''
1686 @echo 'Execute "make" or "make all" 1795 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1796 @echo 'For further info see the ./README file'
1688 1797
1689 1798
1690 help-board-dirs := $(addprefix help-,$(board- 1799 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1800
1692 help-boards: $(help-board-dirs) 1801 help-boards: $(help-board-dirs)
1693 1802
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1803 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1804
1696 $(help-board-dirs): help-%: 1805 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1806 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1807 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1808 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1809 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1810 echo '')
1702 1811
1703 1812
1704 # Documentation targets 1813 # Documentation targets
1705 # ------------------------------------------- 1814 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1815 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707 linkcheckdocs dochelp refcheck 1816 linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
1708 PHONY += $(DOC_TARGETS) 1817 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): 1818 $(DOC_TARGETS):
1710 $(Q)$(MAKE) $(build)=Documentation $@ 1819 $(Q)$(MAKE) $(build)=Documentation $@
1711 1820
1712 1821
1713 # Rust targets 1822 # Rust targets
1714 # ------------------------------------------- 1823 # ---------------------------------------------------------------------------
1715 1824
1716 # "Is Rust available?" target 1825 # "Is Rust available?" target
1717 PHONY += rustavailable 1826 PHONY += rustavailable
1718 rustavailable: 1827 rustavailable:
1719 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip !! 1828 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!"
1720 1829
1721 # Documentation target 1830 # Documentation target
1722 # 1831 #
1723 # Using the singular to avoid running afoul o 1832 # Using the singular to avoid running afoul of `no-dot-config-targets`.
1724 PHONY += rustdoc 1833 PHONY += rustdoc
1725 rustdoc: prepare 1834 rustdoc: prepare
1726 $(Q)$(MAKE) $(build)=rust $@ 1835 $(Q)$(MAKE) $(build)=rust $@
1727 1836
1728 # Testing target 1837 # Testing target
1729 PHONY += rusttest 1838 PHONY += rusttest
1730 rusttest: prepare 1839 rusttest: prepare
1731 $(Q)$(MAKE) $(build)=rust $@ 1840 $(Q)$(MAKE) $(build)=rust $@
1732 1841
1733 # Formatting targets 1842 # Formatting targets
1734 PHONY += rustfmt rustfmtcheck 1843 PHONY += rustfmt rustfmtcheck
1735 1844
1736 # We skip `rust/alloc` since we want to minim 1845 # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
1737 # 1846 #
1738 # We match using absolute paths since `find` 1847 # We match using absolute paths since `find` does not resolve them
1739 # when matching, which is a problem when e.g. 1848 # when matching, which is a problem when e.g. `srctree` is `..`.
1740 # We `grep` afterwards in order to remove the 1849 # We `grep` afterwards in order to remove the directory entry itself.
1741 rustfmt: 1850 rustfmt:
1742 $(Q)find $(abs_srctree) -type f -name 1851 $(Q)find $(abs_srctree) -type f -name '*.rs' \
1743 -o -path $(abs_srctree)/rust/ 1852 -o -path $(abs_srctree)/rust/alloc -prune \
1744 -o -path $(abs_objtree)/rust/ 1853 -o -path $(abs_objtree)/rust/test -prune \
1745 | grep -Fv $(abs_srctree)/rus 1854 | grep -Fv $(abs_srctree)/rust/alloc \
1746 | grep -Fv $(abs_objtree)/rus 1855 | grep -Fv $(abs_objtree)/rust/test \
1747 | grep -Fv generated \ 1856 | grep -Fv generated \
1748 | xargs $(RUSTFMT) $(rustfmt_ 1857 | xargs $(RUSTFMT) $(rustfmt_flags)
1749 1858
1750 rustfmtcheck: rustfmt_flags = --check 1859 rustfmtcheck: rustfmt_flags = --check
1751 rustfmtcheck: rustfmt 1860 rustfmtcheck: rustfmt
1752 1861
>> 1862 # IDE support targets
>> 1863 PHONY += rust-analyzer
>> 1864 rust-analyzer:
>> 1865 $(Q)$(MAKE) $(build)=rust $@
>> 1866
1753 # Misc 1867 # Misc
1754 # ------------------------------------------- 1868 # ---------------------------------------------------------------------------
1755 1869
1756 PHONY += misc-check 1870 PHONY += misc-check
1757 misc-check: 1871 misc-check:
1758 $(Q)$(srctree)/scripts/misc-check 1872 $(Q)$(srctree)/scripts/misc-check
1759 1873
1760 all: misc-check 1874 all: misc-check
1761 1875
1762 PHONY += scripts_gdb 1876 PHONY += scripts_gdb
1763 scripts_gdb: prepare0 1877 scripts_gdb: prepare0
1764 $(Q)$(MAKE) $(build)=scripts/gdb 1878 $(Q)$(MAKE) $(build)=scripts/gdb
1765 $(Q)ln -fsn $(abspath $(srctree)/scri 1879 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1766 1880
1767 ifdef CONFIG_GDB_SCRIPTS 1881 ifdef CONFIG_GDB_SCRIPTS
1768 all: scripts_gdb 1882 all: scripts_gdb
1769 endif 1883 endif
1770 1884
1771 else # KBUILD_EXTMOD 1885 else # KBUILD_EXTMOD
1772 1886
1773 filechk_kernel.release = echo $(KERNELRELEASE 1887 filechk_kernel.release = echo $(KERNELRELEASE)
1774 1888
1775 ### 1889 ###
1776 # External module support. 1890 # External module support.
1777 # When building external modules the kernel u 1891 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1892 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1893 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands 1894 # in the basis kernel ordinary make commands (without M=...) must be used.
1781 1895
1782 # We are always building only modules. 1896 # We are always building only modules.
1783 KBUILD_BUILTIN := 1897 KBUILD_BUILTIN :=
1784 KBUILD_MODULES := 1 1898 KBUILD_MODULES := 1
1785 1899
1786 build-dir := $(KBUILD_EXTMOD) 1900 build-dir := $(KBUILD_EXTMOD)
1787 1901
1788 compile_commands.json: $(extmod_prefix)compil 1902 compile_commands.json: $(extmod_prefix)compile_commands.json
1789 PHONY += compile_commands.json 1903 PHONY += compile_commands.json
1790 1904
1791 clean-dirs := $(KBUILD_EXTMOD) 1905 clean-dirs := $(KBUILD_EXTMOD)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1906 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1793 $(KBUILD_EXTMOD)/compile_commands.jso !! 1907 $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
1794 1908
1795 PHONY += prepare 1909 PHONY += prepare
1796 # now expand this into a simple variable to r 1910 # now expand this into a simple variable to reduce the cost of shell evaluations
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT 1911 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
1798 prepare: 1912 prepare:
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF 1913 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
1800 echo >&2 "warning: the compil 1914 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1801 echo >&2 " The kernel was bu 1915 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
1802 echo >&2 " You are using: 1916 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
1803 fi 1917 fi
1804 1918
1805 PHONY += help 1919 PHONY += help
1806 help: 1920 help:
1807 @echo ' Building external modules.' 1921 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1922 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1923 @echo ''
1810 @echo ' modules - default t 1924 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1925 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1926 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1927 @echo ''
1815 1928
1816 ifndef CONFIG_MODULES <<
1817 modules modules_install: __external_modules_e <<
1818 __external_modules_error: 1929 __external_modules_error:
1819 @echo >&2 '***' 1930 @echo >&2 '***'
1820 @echo >&2 '*** The present kernel dis 1931 @echo >&2 '*** The present kernel disabled CONFIG_MODULES.'
1821 @echo >&2 '*** You cannot build or in 1932 @echo >&2 '*** You cannot build or install external modules.'
1822 @echo >&2 '***' 1933 @echo >&2 '***'
1823 @false 1934 @false
1824 endif <<
1825 1935
1826 endif # KBUILD_EXTMOD 1936 endif # KBUILD_EXTMOD
1827 1937
1828 # ------------------------------------------- 1938 # ---------------------------------------------------------------------------
1829 # Modules 1939 # Modules
1830 1940
1831 PHONY += modules modules_install modules_sign !! 1941 PHONY += modules modules_install modules_prepare
1832 <<
1833 modules_install: <<
1834 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1835 sign-only=$(if $(filter modules_insta <<
1836 <<
1837 ifeq ($(CONFIG_MODULE_SIG),y) <<
1838 # modules_sign is a subset of modules_install <<
1839 # 'make modules_install modules_sign' is equi <<
1840 modules_sign: modules_install <<
1841 @: <<
1842 else <<
1843 modules_sign: <<
1844 @echo >&2 '***' <<
1845 @echo >&2 '*** CONFIG_MODULE_SIG is d <<
1846 @echo >&2 '***' <<
1847 @false <<
1848 endif <<
1849 1942
1850 ifdef CONFIG_MODULES 1943 ifdef CONFIG_MODULES
1851 1944
1852 $(MODORDER): $(build-dir) 1945 $(MODORDER): $(build-dir)
1853 @: 1946 @:
1854 1947
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t 1948 # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
1856 # This is solely useful to speed up test comp 1949 # This is solely useful to speed up test compiles.
1857 modules: modpost 1950 modules: modpost
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1) 1951 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
1859 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1952 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1860 endif 1953 endif
1861 1954
1862 PHONY += modules_check 1955 PHONY += modules_check
1863 modules_check: $(MODORDER) 1956 modules_check: $(MODORDER)
1864 $(Q)$(CONFIG_SHELL) $(srctree)/script 1957 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1865 1958
>> 1959 quiet_cmd_depmod = DEPMOD $(MODLIB)
>> 1960 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1961 $(KERNELRELEASE)
>> 1962
>> 1963 modules_install:
>> 1964 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1965 ifndef modules_sign_only
>> 1966 $(call cmd,depmod)
>> 1967 endif
>> 1968
1866 else # CONFIG_MODULES 1969 else # CONFIG_MODULES
1867 1970
1868 modules: !! 1971 # Modules not configured
>> 1972 # ---------------------------------------------------------------------------
>> 1973
>> 1974 PHONY += __external_modules_error
>> 1975
>> 1976 modules modules_install: __external_modules_error
1869 @: 1977 @:
1870 1978
1871 KBUILD_MODULES := 1979 KBUILD_MODULES :=
1872 1980
1873 endif # CONFIG_MODULES 1981 endif # CONFIG_MODULES
1874 1982
1875 PHONY += modpost 1983 PHONY += modpost
1876 modpost: $(if $(single-build),, $(if $(KBUILD 1984 modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \
1877 $(if $(KBUILD_MODULES), modules_chec 1985 $(if $(KBUILD_MODULES), modules_check)
1878 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1986 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1879 1987
1880 # Single targets 1988 # Single targets
1881 # ------------------------------------------- 1989 # ---------------------------------------------------------------------------
1882 # To build individual files in subdirectories 1990 # To build individual files in subdirectories, you can do like this:
1883 # 1991 #
1884 # make foo/bar/baz.s 1992 # make foo/bar/baz.s
1885 # 1993 #
1886 # The supported suffixes for single-target ar 1994 # The supported suffixes for single-target are listed in 'single-targets'
1887 # 1995 #
1888 # To build only under specific subdirectories 1996 # To build only under specific subdirectories, you can do like this:
1889 # 1997 #
1890 # make foo/bar/baz/ 1998 # make foo/bar/baz/
1891 1999
1892 ifdef single-build 2000 ifdef single-build
1893 2001
1894 # .ko is special because modpost is needed 2002 # .ko is special because modpost is needed
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG 2003 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1896 single-no-ko := $(filter-out $(single-ko), $( 2004 single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
1897 $(foreach x, o mod, $(patsubs 2005 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
1898 2006
1899 $(single-ko): single_modules 2007 $(single-ko): single_modules
1900 @: 2008 @:
1901 $(single-no-ko): $(build-dir) 2009 $(single-no-ko): $(build-dir)
1902 @: 2010 @:
1903 2011
1904 # Remove MODORDER when done because it is not 2012 # Remove MODORDER when done because it is not the real one.
1905 PHONY += single_modules 2013 PHONY += single_modules
1906 single_modules: $(single-no-ko) modules_prepa 2014 single_modules: $(single-no-ko) modules_prepare
1907 $(Q){ $(foreach m, $(single-ko), echo 2015 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER)
1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 2016 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) 2017 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 2018 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1911 endif 2019 endif
1912 $(Q)rm -f $(MODORDER) 2020 $(Q)rm -f $(MODORDER)
1913 2021
1914 single-goals := $(addprefix $(build-dir)/, $( 2022 single-goals := $(addprefix $(build-dir)/, $(single-no-ko))
1915 2023
1916 KBUILD_MODULES := 1 2024 KBUILD_MODULES := 1
1917 2025
1918 endif 2026 endif
1919 2027
1920 # Preset locale variables to speed up the bui 2028 # Preset locale variables to speed up the build process. Limit locale
1921 # tweaks to this spot to avoid wrong language 2029 # tweaks to this spot to avoid wrong language settings when running
1922 # make menuconfig etc. 2030 # make menuconfig etc.
1923 # Error messages still appears in the origina 2031 # Error messages still appears in the original language
1924 PHONY += $(build-dir) 2032 PHONY += $(build-dir)
1925 $(build-dir): prepare 2033 $(build-dir): prepare
1926 $(Q)$(MAKE) $(build)=$@ need-builtin= 2034 $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals)
1927 2035
1928 clean-dirs := $(addprefix _clean_, $(clean-di 2036 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1929 PHONY += $(clean-dirs) clean 2037 PHONY += $(clean-dirs) clean
1930 $(clean-dirs): 2038 $(clean-dirs):
1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea 2039 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1932 2040
1933 clean: $(clean-dirs) 2041 clean: $(clean-dirs)
1934 $(call cmd,rmfiles) 2042 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS 2043 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name 2044 \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ 2045 -o -name '*.ko.*' \
1938 -o -name '*.dtb' -o -name '*. 2046 -o -name '*.dtb' -o -name '*.dtbo' \
1939 -o -name '*.dtb.S' -o -name ' 2047 -o -name '*.dtb.S' -o -name '*.dtbo.S' \
1940 -o -name '*.dt.yaml' -o -name !! 2048 -o -name '*.dt.yaml' \
1941 -o -name '*.dwo' -o -name '*. 2049 -o -name '*.dwo' -o -name '*.lst' \
1942 -o -name '*.su' -o -name '*.m 2050 -o -name '*.su' -o -name '*.mod' \
1943 -o -name '.*.d' -o -name '.*. 2051 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' 2052 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945 -o -name '*.asn1.[ch]' \ 2053 -o -name '*.asn1.[ch]' \
1946 -o -name '*.symtypes' -o -nam 2054 -o -name '*.symtypes' -o -name 'modules.order' \
1947 -o -name '*.c.[012]*.*' \ 2055 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 2056 -o -name '*.ll' \
1949 -o -name '*.gcno' \ 2057 -o -name '*.gcno' \
1950 -o -name '*.*.symversions' \) 2058 -o -name '*.*.symversions' \) -type f -print \
1951 -o -name '.tmp_*' -print \ 2059 -o -name '.tmp_*' -print \
1952 | xargs rm -rf 2060 | xargs rm -rf
1953 2061
1954 # Generate tags for editors 2062 # Generate tags for editors
1955 # ------------------------------------------- 2063 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 2064 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t 2065 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1958 2066
1959 tags TAGS cscope gtags: FORCE 2067 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 2068 $(call cmd,tags)
1961 2069
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1968 $(Q)$(MAKE) $(build)=rust $@ <<
1969 <<
1970 # Script to generate missing namespace depend 2070 # Script to generate missing namespace dependencies
1971 # ------------------------------------------- 2071 # ---------------------------------------------------------------------------
1972 2072
1973 PHONY += nsdeps 2073 PHONY += nsdeps
1974 nsdeps: export KBUILD_NSDEPS=1 2074 nsdeps: export KBUILD_NSDEPS=1
1975 nsdeps: modules 2075 nsdeps: modules
1976 $(Q)$(CONFIG_SHELL) $(srctree)/script 2076 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1977 2077
1978 # Clang Tooling 2078 # Clang Tooling
1979 # ------------------------------------------- 2079 # ---------------------------------------------------------------------------
1980 2080
1981 quiet_cmd_gen_compile_commands = GEN $@ 2081 quiet_cmd_gen_compile_commands = GEN $@
1982 cmd_gen_compile_commands = $(PYTHON3) $ 2082 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1983 2083
1984 $(extmod_prefix)compile_commands.json: $(srct !! 2084 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1985 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K 2085 $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \
1986 $(if $(CONFIG_MODULES), $(MODORDER)) 2086 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1987 $(call if_changed,gen_compile_command 2087 $(call if_changed,gen_compile_commands)
1988 2088
1989 targets += $(extmod_prefix)compile_commands.j 2089 targets += $(extmod_prefix)compile_commands.json
1990 2090
1991 PHONY += clang-tidy clang-analyzer 2091 PHONY += clang-tidy clang-analyzer
1992 2092
1993 ifdef CONFIG_CC_IS_CLANG 2093 ifdef CONFIG_CC_IS_CLANG
1994 quiet_cmd_clang_tools = CHECK $< 2094 quiet_cmd_clang_tools = CHECK $<
1995 cmd_clang_tools = $(PYTHON3) $(srctree) 2095 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1996 2096
1997 clang-tidy clang-analyzer: $(extmod_prefix)co 2097 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
1998 $(call cmd,clang_tools) 2098 $(call cmd,clang_tools)
1999 else 2099 else
2000 clang-tidy clang-analyzer: 2100 clang-tidy clang-analyzer:
2001 @echo "$@ requires CC=clang" >&2 2101 @echo "$@ requires CC=clang" >&2
2002 @false 2102 @false
2003 endif 2103 endif
2004 2104
2005 # Scripts to check various things for consist 2105 # Scripts to check various things for consistency
2006 # ------------------------------------------- 2106 # ---------------------------------------------------------------------------
2007 2107
2008 PHONY += includecheck versioncheck coccicheck 2108 PHONY += includecheck versioncheck coccicheck export_report
2009 2109
2010 includecheck: 2110 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 2111 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 2112 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 2113 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 2114
2015 versioncheck: 2115 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 2116 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 2117 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 2118 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 2119
2020 coccicheck: 2120 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ 2121 $(Q)$(BASH) $(srctree)/scripts/$@
2022 2122
2023 export_report: 2123 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 2124 $(PERL) $(srctree)/scripts/export_report.pl
2025 2125
2026 PHONY += checkstack kernelrelease kernelversi 2126 PHONY += checkstack kernelrelease kernelversion image_name
2027 2127
2028 # UML needs a little special treatment here. 2128 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 2129 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 2130 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 2131 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 2132 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 2133 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 2134 else
2035 CHECKSTACK_ARCH := $(ARCH) 2135 CHECKSTACK_ARCH := $(ARCH)
2036 endif 2136 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 2137 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 2138 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 2139 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 2140
2042 kernelrelease: 2141 kernelrelease:
2043 @$(filechk_kernel.release) 2142 @$(filechk_kernel.release)
2044 2143
2045 kernelversion: 2144 kernelversion:
2046 @echo $(KERNELVERSION) 2145 @echo $(KERNELVERSION)
2047 2146
2048 image_name: 2147 image_name:
2049 @echo $(KBUILD_IMAGE) 2148 @echo $(KBUILD_IMAGE)
2050 <<
2051 PHONY += run-command <<
2052 run-command: <<
2053 $(Q)$(KBUILD_RUN_COMMAND) <<
2054 2149
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 2150 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) 2151 cmd_rmfiles = rm -rf $(rm-files)
2057 2152
2058 # read saved command lines for existing targe 2153 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe 2154 existing-targets := $(wildcard $(sort $(targets)))
2060 2155
2061 -include $(foreach f,$(existing-targets),$(di 2156 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062 2157
2063 endif # config-build 2158 endif # config-build
2064 endif # mixed-build 2159 endif # mixed-build
2065 endif # need-sub-make 2160 endif # need-sub-make
2066 2161
2067 PHONY += FORCE 2162 PHONY += FORCE
2068 FORCE: 2163 FORCE:
2069 2164
2070 # Declare the contents of the PHONY variable 2165 # Declare the contents of the PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 2166 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 2167 .PHONY: $(PHONY)
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