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