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