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