1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 2 VERSION = 6
3 PATCHLEVEL = 12 !! 3 PATCHLEVEL = 7
4 SUBLEVEL = 0 !! 4 SUBLEVEL = 12
5 EXTRAVERSION = -rc7 !! 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Hurr durr I'ma ninja sloth
7 7
8 # *DOCUMENTATION* 8 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 10 # More info can be located in ./README
11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file.
13 13
14 ifeq ($(filter output-sync,$(.FEATURES)),) !! 14 ifeq ($(filter undefine,$(.FEATURES)),)
15 $(error GNU Make >= 4.0 is required. Your Make !! 15 $(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION))
16 endif 16 endif
17 17
18 $(if $(filter __%, $(MAKECMDGOALS)), \ 18 $(if $(filter __%, $(MAKECMDGOALS)), \
19 $(error targets prefixed with '__' are 19 $(error targets prefixed with '__' are only for internal use))
20 20
21 # That's our default target when none is given 21 # That's our default target when none is given on the command line
22 PHONY := __all 22 PHONY := __all
23 __all: 23 __all:
24 24
25 # We are using a recursive build, so we need t 25 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 26 # to get the ordering right.
27 # 27 #
28 # Most importantly: sub-Makefiles should only 28 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 29 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 30 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 31 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 32 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 33 # after that we are sure that everything which is in that other dir
34 # is now up to date. 34 # is now up to date.
35 # 35 #
36 # The only cases where we need to modify files 36 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 37 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 38 # descending is started. They are now explicitly listed as the
39 # prepare rule. 39 # prepare rule.
40 40
41 this-makefile := $(lastword $(MAKEFILE_LIST)) 41 this-makefile := $(lastword $(MAKEFILE_LIST))
42 abs_srctree := $(realpath $(dir $(this-makefil !! 42 export abs_srctree := $(realpath $(dir $(this-makefile)))
43 abs_objtree := $(CURDIR) !! 43 export abs_objtree := $(CURDIR)
44 44
45 ifneq ($(sub_make_done),1) 45 ifneq ($(sub_make_done),1)
46 46
47 # Do not use make's built-in rules and variabl 47 # Do not use make's built-in rules and variables
48 # (this increases performance and avoids hard- 48 # (this increases performance and avoids hard-to-debug behaviour)
49 MAKEFLAGS += -rR 49 MAKEFLAGS += -rR
50 50
51 # Avoid funny character set dependencies 51 # Avoid funny character set dependencies
52 unexport LC_ALL 52 unexport LC_ALL
53 LC_COLLATE=C 53 LC_COLLATE=C
54 LC_NUMERIC=C 54 LC_NUMERIC=C
55 export LC_COLLATE LC_NUMERIC 55 export LC_COLLATE LC_NUMERIC
56 56
57 # Avoid interference with shell env settings 57 # Avoid interference with shell env settings
58 unexport GREP_OPTIONS 58 unexport GREP_OPTIONS
59 59
60 # Beautify output 60 # Beautify output
61 # -------------------------------------------- 61 # ---------------------------------------------------------------------------
62 # 62 #
63 # Most of build commands in Kbuild start with 63 # Most of build commands in Kbuild start with "cmd_". You can optionally define
64 # "quiet_cmd_*". If defined, the short log is 64 # "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from
65 # that command is printed by default. 65 # that command is printed by default.
66 # 66 #
67 # e.g.) 67 # e.g.)
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) 68 # quiet_cmd_depmod = DEPMOD $(MODLIB)
69 # cmd_depmod = $(srctree)/scripts/dep 69 # cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE)
70 # 70 #
71 # A simple variant is to prefix commands with 71 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 72 # for commands that shall be hidden in non-verbose mode.
73 # 73 #
74 # $(Q)$(MAKE) $(build)=scripts/basic 74 # $(Q)$(MAKE) $(build)=scripts/basic
75 # 75 #
76 # If KBUILD_VERBOSE contains 1, the whole comm 76 # If KBUILD_VERBOSE contains 1, the whole command is echoed.
77 # If KBUILD_VERBOSE contains 2, the reason for 77 # If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed.
78 # 78 #
79 # To put more focus on warnings, be less verbo 79 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 80 # Use 'make V=1' to see the full commands
81 81
82 ifeq ("$(origin V)", "command line") 82 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 83 KBUILD_VERBOSE = $(V)
84 endif 84 endif
85 85
86 quiet = quiet_ 86 quiet = quiet_
87 Q = @ 87 Q = @
88 88
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)
90 quiet = 90 quiet =
91 Q = 91 Q =
92 endif 92 endif
93 93
94 # If the user is running make -s (silent mode) 94 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 95 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 96 # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
>> 97
>> 98 ifeq ($(filter 3.%,$(MAKE_VERSION)),)
>> 99 short-opts := $(firstword -$(MAKEFLAGS))
>> 100 else
>> 101 short-opts := $(filter-out --%,$(MAKEFLAGS))
>> 102 endif
>> 103
>> 104 ifneq ($(findstring s,$(short-opts)),)
97 quiet=silent_ 105 quiet=silent_
98 override KBUILD_VERBOSE := 106 override KBUILD_VERBOSE :=
99 endif 107 endif
100 108
101 export quiet Q KBUILD_VERBOSE 109 export quiet Q KBUILD_VERBOSE
102 110
103 # Call a source code checker (by default, "spa 111 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation. 112 # C compilation.
105 # 113 #
106 # Use 'make C=1' to enable checking of only re 114 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s 115 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not. 116 # of whether they are re-compiled or not.
109 # 117 #
110 # See the file "Documentation/dev-tools/sparse 118 # See the file "Documentation/dev-tools/sparse.rst" for more details,
111 # including where to get the "sparse" utility. 119 # including where to get the "sparse" utility.
112 120
113 ifeq ("$(origin C)", "command line") 121 ifeq ("$(origin C)", "command line")
114 KBUILD_CHECKSRC = $(C) 122 KBUILD_CHECKSRC = $(C)
115 endif 123 endif
116 ifndef KBUILD_CHECKSRC 124 ifndef KBUILD_CHECKSRC
117 KBUILD_CHECKSRC = 0 125 KBUILD_CHECKSRC = 0
118 endif 126 endif
119 127
120 export KBUILD_CHECKSRC 128 export KBUILD_CHECKSRC
121 129
122 # Enable "clippy" (a linter) as part of the Ru 130 # Enable "clippy" (a linter) as part of the Rust compilation.
123 # 131 #
124 # Use 'make CLIPPY=1' to enable it. 132 # Use 'make CLIPPY=1' to enable it.
125 ifeq ("$(origin CLIPPY)", "command line") 133 ifeq ("$(origin CLIPPY)", "command line")
126 KBUILD_CLIPPY := $(CLIPPY) 134 KBUILD_CLIPPY := $(CLIPPY)
127 endif 135 endif
128 136
129 export KBUILD_CLIPPY 137 export KBUILD_CLIPPY
130 138
131 # Use make M=dir or set the environment variab 139 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
132 # directory of external module to build. Setti 140 # directory of external module to build. Setting M= takes precedence.
133 ifeq ("$(origin M)", "command line") 141 ifeq ("$(origin M)", "command line")
134 KBUILD_EXTMOD := $(M) 142 KBUILD_EXTMOD := $(M)
135 endif 143 endif
136 144
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ 145 $(if $(word 2, $(KBUILD_EXTMOD)), \
138 $(error building multiple external mod 146 $(error building multiple external modules is not supported))
139 147
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI 148 $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
141 $(error module directory path cannot c 149 $(error module directory path cannot contain '$x')))
142 150
143 # Remove trailing slashes 151 # Remove trailing slashes
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 152 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM 153 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
146 endif 154 endif
147 155
148 export KBUILD_EXTMOD 156 export KBUILD_EXTMOD
149 157
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif <<
156 <<
157 export KBUILD_EXTRA_WARN <<
158 <<
159 # Kbuild will save output files in the current 158 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t 159 # This does not need to match to the root of the kernel source tree.
161 # 160 #
162 # For example, you can do this: 161 # For example, you can do this:
163 # 162 #
164 # cd /dir/to/store/output/files; make -f /dir 163 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 # 164 #
166 # If you want to save output files in a differ 165 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it. 166 # two syntaxes to specify it.
168 # 167 #
169 # 1) O= 168 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 169 # Use "make O=dir/to/store/output/files/"
171 # 170 #
172 # 2) Set KBUILD_OUTPUT 171 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t 172 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil 173 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 # 174 #
176 # The O= assignment takes precedence over the 175 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 176 # variable.
178 177
179 # Do we want to change the working directory? 178 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line") 179 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 180 KBUILD_OUTPUT := $(O)
182 endif 181 endif
183 182
184 ifneq ($(KBUILD_OUTPUT),) 183 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does !! 184 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 185 # expand a shell special character '~'. We use a somewhat tedious way here.
>> 186 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
>> 187 $(if $(abs_objtree),, \
>> 188 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
>> 189
187 # $(realpath ...) resolves symlinks 190 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 191 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create <<
190 endif # ifneq ($(KBUILD_OUTPUT),) 192 endif # ifneq ($(KBUILD_OUTPUT),)
191 193
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 194 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
193 $(error source directory cannot contain spaces 195 $(error source directory cannot contain spaces or colons)
194 endif 196 endif
195 197
>> 198 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
>> 199 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
>> 200 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
>> 201 need-sub-make := 1
>> 202 # Cancel implicit rules for this Makefile.
>> 203 $(this-makefile): ;
>> 204 endif
>> 205
196 export sub_make_done := 1 206 export sub_make_done := 1
197 207
198 endif # sub_make_done 208 endif # sub_make_done
199 209
200 ifeq ($(abs_objtree),$(CURDIR)) 210 ifeq ($(abs_objtree),$(CURDIR))
201 # Suppress "Entering directory ..." if we are 211 # Suppress "Entering directory ..." if we are at the final work directory.
202 no-print-directory := --no-print-directory 212 no-print-directory := --no-print-directory
203 else 213 else
204 # Recursion to show "Entering directory ..." 214 # Recursion to show "Entering directory ..."
205 need-sub-make := 1 215 need-sub-make := 1
206 endif 216 endif
207 217
208 ifeq ($(filter --no-print-directory, $(MAKEFLA 218 ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),)
209 # If --no-print-directory is unset, recurse on 219 # If --no-print-directory is unset, recurse once again to set it.
210 # You may end up recursing into __sub-make twi 220 # You may end up recursing into __sub-make twice. This is needed due to the
211 # behavior change in GNU Make 4.4.1. 221 # behavior change in GNU Make 4.4.1.
212 need-sub-make := 1 222 need-sub-make := 1
213 endif 223 endif
214 224
215 ifeq ($(need-sub-make),1) 225 ifeq ($(need-sub-make),1)
216 226
217 PHONY += $(MAKECMDGOALS) __sub-make 227 PHONY += $(MAKECMDGOALS) __sub-make
218 228
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) 229 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220 @: 230 @:
221 231
222 # Invoke a second make in the output directory 232 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: 233 __sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ 234 $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \
225 -f $(abs_srctree)/Makefile $(MAKECMDGO 235 -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
226 236
227 else # need-sub-make 237 else # need-sub-make
228 238
229 # We process the rest of the Makefile if this 239 # We process the rest of the Makefile if this is the final invocation of make
230 240
231 ifeq ($(abs_srctree),$(abs_objtree)) 241 ifeq ($(abs_srctree),$(abs_objtree))
232 # building in the source tree 242 # building in the source tree
233 srctree := . 243 srctree := .
234 building_out_of_srctree := 244 building_out_of_srctree :=
235 else 245 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 246 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237 # building in a subdirectory o 247 # building in a subdirectory of the source tree
238 srctree := .. 248 srctree := ..
239 else 249 else
240 srctree := $(abs_srctree) 250 srctree := $(abs_srctree)
241 endif 251 endif
242 building_out_of_srctree := 1 252 building_out_of_srctree := 1
243 endif 253 endif
244 254
245 ifneq ($(KBUILD_ABS_SRCTREE),) 255 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree) 256 srctree := $(abs_srctree)
247 endif 257 endif
248 258
249 objtree := . 259 objtree := .
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 260 VPATH := $(srctree)
256 endif <<
257 endif <<
258 261
259 export building_out_of_srctree srctree objtree 262 export building_out_of_srctree srctree objtree VPATH
260 263
261 # To make sure we do not include .config for a 264 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 265 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 266 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 267 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 268 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 269 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 270 # of make so .config is not included in this case either (for *config).
268 271
269 version_h := include/generated/uapi/linux/vers 272 version_h := include/generated/uapi/linux/version.h
270 273
271 clean-targets := %clean mrproper cleandocs 274 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 275 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 276 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers 277 $(version_h) headers headers_% archheaders archscripts \
275 %asm-generic kernelve 278 %asm-generic kernelversion %src-pkg dt_binding_check \
276 outputmakefile rustav 279 outputmakefile rustavailable rustfmt rustfmtcheck
277 no-sync-config-targets := $(no-dot-config-targ 280 no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \
278 image_name 281 image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls 282 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/
280 283
281 config-build := 284 config-build :=
282 mixed-build := 285 mixed-build :=
283 need-config := 1 286 need-config := 1
284 may-sync-config := 1 287 may-sync-config := 1
285 single-build := 288 single-build :=
286 289
287 ifneq ($(filter $(no-dot-config-targets), $(MA 290 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 291 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 292 need-config :=
290 endif !! 293 endif
291 endif 294 endif
292 295
293 ifneq ($(filter $(no-sync-config-targets), $(M 296 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 297 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 298 may-sync-config :=
296 endif !! 299 endif
297 endif 300 endif
298 301
299 need-compiler := $(may-sync-config) 302 need-compiler := $(may-sync-config)
300 303
301 ifneq ($(KBUILD_EXTMOD),) 304 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 305 may-sync-config :=
303 endif 306 endif
304 307
305 ifeq ($(KBUILD_EXTMOD),) 308 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 309 ifneq ($(filter %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 310 config-build := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 311 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 312 mixed-build := 1
>> 313 endif
310 endif 314 endif
311 endif <<
312 endif 315 endif
313 316
314 # We cannot build single targets and the other 317 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO 318 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 single-build := 1 !! 319 single-build := 1
317 ifneq ($(filter-out $(single-targets), $(M !! 320 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318 mixed-build := 1 !! 321 mixed-build := 1
319 endif !! 322 endif
320 endif 323 endif
321 324
322 # For "make -j clean all", "make -j mrproper d 325 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 326 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 327 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 328 mixed-build := 1
326 endif !! 329 endif
327 endif 330 endif
328 331
329 # install and modules_install need also be pro 332 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 333 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 334 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 335 mixed-build := 1
333 endif !! 336 endif
334 endif 337 endif
335 338
336 ifdef mixed-build 339 ifdef mixed-build
337 # ============================================ 340 # ===========================================================================
338 # We're called with mixed targets (*config and 341 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 342 # Handle them one by one.
340 343
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 344 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 345
343 $(MAKECMDGOALS): __build_one_by_one 346 $(MAKECMDGOALS): __build_one_by_one
344 @: 347 @:
345 348
346 __build_one_by_one: 349 __build_one_by_one:
347 $(Q)set -e; \ 350 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 351 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 352 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 353 done
351 354
352 else # !mixed-build 355 else # !mixed-build
353 356
354 include $(srctree)/scripts/Kbuild.include 357 include $(srctree)/scripts/Kbuild.include
355 358
356 # Read KERNELRELEASE from include/config/kerne 359 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf 360 KERNELRELEASE = $(call read-file, include/config/kernel.release)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 361 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 362 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 363
361 include $(srctree)/scripts/subarch.include 364 include $(srctree)/scripts/subarch.include
362 365
363 # Cross compiling and selecting different set 366 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 367 # ---------------------------------------------------------------------------
365 # 368 #
366 # When performing cross compilation for other 369 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 370 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 371 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 372 # make ARCH=arm64
370 # Another way is to have ARCH set in the envir 373 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 374 # The default ARCH is the host where make is executed.
372 375
373 # CROSS_COMPILE specify the prefix used for al 376 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 377 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 378 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 379 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- 380 # make CROSS_COMPILE=aarch64-linux-gnu-
378 # Alternatively CROSS_COMPILE can be set in th 381 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 382 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 383 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 384 ARCH ?= $(SUBARCH)
382 385
383 # Architecture as present in compile.h 386 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 387 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 388 SRCARCH := $(ARCH)
386 389
387 # Additional ARCH settings for x86 390 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 391 ifeq ($(ARCH),i386)
389 SRCARCH := x86 392 SRCARCH := x86
390 endif 393 endif
391 ifeq ($(ARCH),x86_64) 394 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 395 SRCARCH := x86
393 endif 396 endif
394 397
395 # Additional ARCH settings for sparc 398 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 399 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 400 SRCARCH := sparc
398 endif 401 endif
399 ifeq ($(ARCH),sparc64) 402 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 403 SRCARCH := sparc
401 endif 404 endif
402 405
403 # Additional ARCH settings for parisc 406 # Additional ARCH settings for parisc
404 ifeq ($(ARCH),parisc64) 407 ifeq ($(ARCH),parisc64)
405 SRCARCH := parisc 408 SRCARCH := parisc
406 endif 409 endif
407 410
408 export cross_compiling := 411 export cross_compiling :=
409 ifneq ($(SRCARCH),$(SUBARCH)) 412 ifneq ($(SRCARCH),$(SUBARCH))
410 cross_compiling := 1 413 cross_compiling := 1
411 endif 414 endif
412 415
413 KCONFIG_CONFIG ?= .config 416 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 417 export KCONFIG_CONFIG
415 418
416 # SHELL used by kbuild 419 # SHELL used by kbuild
417 CONFIG_SHELL := sh 420 CONFIG_SHELL := sh
418 421
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 422 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 423 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 424 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 425
423 ifneq ($(LLVM),) 426 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),) 427 ifneq ($(filter %/,$(LLVM)),)
425 LLVM_PREFIX := $(LLVM) 428 LLVM_PREFIX := $(LLVM)
426 else ifneq ($(filter -%,$(LLVM)),) 429 else ifneq ($(filter -%,$(LLVM)),)
427 LLVM_SUFFIX := $(LLVM) 430 LLVM_SUFFIX := $(LLVM)
428 endif 431 endif
429 432
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 433 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 434 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
432 else 435 else
433 HOSTCC = gcc 436 HOSTCC = gcc
434 HOSTCXX = g++ 437 HOSTCXX = g++
435 endif 438 endif
436 HOSTRUSTC = rustc 439 HOSTRUSTC = rustc
437 HOSTPKG_CONFIG = pkg-config 440 HOSTPKG_CONFIG = pkg-config
438 441
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto 442 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440 -O2 -fomit-frame-poin 443 -O2 -fomit-frame-pointer -std=gnu11
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) 444 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) 445 KBUILD_USERLDFLAGS := $(USERLDFLAGS)
443 446
444 # These flags apply to all Rust code in the tr 447 # These flags apply to all Rust code in the tree, including the kernel and
445 # host programs. 448 # host programs.
446 export rust_common_flags := --edition=2021 \ 449 export rust_common_flags := --edition=2021 \
447 -Zbinary_dep_depin 450 -Zbinary_dep_depinfo=y \
448 -Astable_features !! 451 -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \
449 -Dunsafe_op_in_uns !! 452 -Dunreachable_pub -Dnon_ascii_idents \
450 -Dnon_ascii_idents <<
451 -Wrust_2018_idioms <<
452 -Wunreachable_pub <<
453 -Wmissing_docs \ 453 -Wmissing_docs \
454 -Wrustdoc::missing !! 454 -Drustdoc::missing_crate_level_docs \
455 -Wclippy::all \ !! 455 -Dclippy::correctness -Dclippy::style \
456 -Wclippy::mut_mut !! 456 -Dclippy::suspicious -Dclippy::complexity \
457 -Wclippy::needless !! 457 -Dclippy::perf \
458 -Wclippy::needless !! 458 -Dclippy::let_unit_value -Dclippy::mut_mut \
459 -Wclippy::no_mangl !! 459 -Dclippy::needless_bitwise_bool \
>> 460 -Dclippy::needless_continue \
>> 461 -Dclippy::no_mangle_with_rust_abi \
460 -Wclippy::dbg_macr 462 -Wclippy::dbg_macro
461 463
462 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS !! 464 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
463 $(HOSTCFLAGS) -I $(srct !! 465 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) - 466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
467 -Zallow-features= $(HO 467 -Zallow-features= $(HOSTRUSTFLAGS)
468 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(H 468 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 470
471 # Make variables (CC, etc...) 471 # Make variables (CC, etc...)
472 CPP = $(CC) -E 472 CPP = $(CC) -E
473 ifneq ($(LLVM),) 473 ifneq ($(LLVM),)
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU 474 CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S 475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ 476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ 477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( 478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( 479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
480 READELF = $(LLVM_PREFIX)llvm-readelf$( 480 READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL 481 STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
482 else 482 else
483 CC = $(CROSS_COMPILE)gcc 483 CC = $(CROSS_COMPILE)gcc
484 LD = $(CROSS_COMPILE)ld 484 LD = $(CROSS_COMPILE)ld
485 AR = $(CROSS_COMPILE)ar 485 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 486 NM = $(CROSS_COMPILE)nm
487 OBJCOPY = $(CROSS_COMPILE)objcopy 487 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 488 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf 489 READELF = $(CROSS_COMPILE)readelf
490 STRIP = $(CROSS_COMPILE)strip 490 STRIP = $(CROSS_COMPILE)strip
491 endif 491 endif
492 RUSTC = rustc 492 RUSTC = rustc
493 RUSTDOC = rustdoc 493 RUSTDOC = rustdoc
494 RUSTFMT = rustfmt 494 RUSTFMT = rustfmt
495 CLIPPY_DRIVER = clippy-driver 495 CLIPPY_DRIVER = clippy-driver
496 BINDGEN = bindgen 496 BINDGEN = bindgen
>> 497 CARGO = cargo
497 PAHOLE = pahole 498 PAHOLE = pahole
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve 499 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX = flex 500 LEX = flex
500 YACC = bison 501 YACC = bison
501 AWK = awk 502 AWK = awk
502 INSTALLKERNEL := installkernel 503 INSTALLKERNEL := installkernel
503 PERL = perl 504 PERL = perl
504 PYTHON3 = python3 505 PYTHON3 = python3
505 CHECK = sparse 506 CHECK = sparse
506 BASH = bash 507 BASH = bash
507 KGZIP = gzip 508 KGZIP = gzip
508 KBZIP2 = bzip2 509 KBZIP2 = bzip2
509 KLZOP = lzop 510 KLZOP = lzop
510 LZMA = lzma 511 LZMA = lzma
511 LZ4 = lz4c 512 LZ4 = lz4c
512 XZ = xz 513 XZ = xz
513 ZSTD = zstd 514 ZSTD = zstd
514 515
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 516 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 517 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := 518 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE = 519 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = 520 RUSTFLAGS_MODULE =
520 AFLAGS_MODULE = 521 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 522 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 523 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = 524 RUSTFLAGS_KERNEL =
524 AFLAGS_KERNEL = 525 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 526 LDFLAGS_vmlinux =
526 527
527 # Use USERINCLUDE when you must reference the 528 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 529 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 530 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 531 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 532 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 533 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li 534 -include $(srctree)/include/linux/compiler-version.h \
534 -include $(srctree)/include/li 535 -include $(srctree)/include/linux/kconfig.h
535 536
536 # Use LINUXINCLUDE when you must reference the 537 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 538 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 539 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 540 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 541 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree 542 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542 -I$(objtree)/include \ 543 -I$(objtree)/include \
543 $(USERINCLUDE) 544 $(USERINCLUDE)
544 545
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 546 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 547
547 KBUILD_CFLAGS := 548 KBUILD_CFLAGS :=
548 KBUILD_CFLAGS += -std=gnu11 549 KBUILD_CFLAGS += -std=gnu11
549 KBUILD_CFLAGS += -fshort-wchar 550 KBUILD_CFLAGS += -fshort-wchar
550 KBUILD_CFLAGS += -funsigned-char 551 KBUILD_CFLAGS += -funsigned-char
551 KBUILD_CFLAGS += -fno-common 552 KBUILD_CFLAGS += -fno-common
552 KBUILD_CFLAGS += -fno-PIE 553 KBUILD_CFLAGS += -fno-PIE
553 KBUILD_CFLAGS += -fno-strict-aliasing 554 KBUILD_CFLAGS += -fno-strict-aliasing
554 555
555 KBUILD_CPPFLAGS := -D__KERNEL__ 556 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ 557 KBUILD_RUSTFLAGS := $(rust_common_flags) \
>> 558 --target=$(objtree)/scripts/target.json \
557 -Cpanic=abort -Cembed-bitc 559 -Cpanic=abort -Cembed-bitcode=n -Clto=n \
558 -Cforce-unwind-tables=n -C 560 -Cforce-unwind-tables=n -Ccodegen-units=1 \
559 -Csymbol-mangling-version= 561 -Csymbol-mangling-version=v0 \
560 -Crelocation-model=static 562 -Crelocation-model=static \
561 -Zfunction-sections=n \ 563 -Zfunction-sections=n \
562 -Wclippy::float_arithmetic !! 564 -Dclippy::float_arithmetic
563 565
564 KBUILD_AFLAGS_KERNEL := 566 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 567 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := 568 KBUILD_RUSTFLAGS_KERNEL :=
567 KBUILD_AFLAGS_MODULE := -DMODULE 569 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 570 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE 571 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE
570 KBUILD_LDFLAGS_MODULE := 572 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS := 573 KBUILD_LDFLAGS :=
572 CLANG_FLAGS := 574 CLANG_FLAGS :=
573 575
574 ifeq ($(KBUILD_CLIPPY),1) 576 ifeq ($(KBUILD_CLIPPY),1)
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY 577 RUSTC_OR_CLIPPY_QUIET := CLIPPY
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) 578 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
577 else 579 else
578 RUSTC_OR_CLIPPY_QUIET := RUSTC 580 RUSTC_OR_CLIPPY_QUIET := RUSTC
579 RUSTC_OR_CLIPPY = $(RUSTC) 581 RUSTC_OR_CLIPPY = $(RUSTC)
580 endif 582 endif
581 583
>> 584 ifdef RUST_LIB_SRC
>> 585 export RUST_LIB_SRC
>> 586 endif
>> 587
582 # Allows the usage of unstable features in sta 588 # Allows the usage of unstable features in stable compilers.
583 export RUSTC_BOOTSTRAP := 1 589 export RUSTC_BOOTSTRAP := 1
584 590
585 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K 591 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
586 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q !! 592 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO
587 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS 593 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS
588 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF 594 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
589 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ 595 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
590 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 596 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
591 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 597 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
592 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 598 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
593 599
594 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 600 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
595 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 601 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
596 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF 602 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
597 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 603 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
598 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU 604 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
599 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN 605 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
600 606
601 # Files to ignore in find ... statements 607 # Files to ignore in find ... statements
602 608
603 export RCS_FIND_IGNORE := \( -name SCCS -o -na 609 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
604 -name CVS -o -name . 610 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
605 -prune -o 611 -prune -o
>> 612 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 613 --exclude CVS --exclude .pc --exclude .hg --exclude .git
606 614
607 # ============================================ 615 # ===========================================================================
608 # Rules shared between *config targets and bui 616 # Rules shared between *config targets and build targets
609 617
610 # Basic helpers built in scripts/basic/ 618 # Basic helpers built in scripts/basic/
611 PHONY += scripts_basic 619 PHONY += scripts_basic
612 scripts_basic: 620 scripts_basic:
613 $(Q)$(MAKE) $(build)=scripts/basic 621 $(Q)$(MAKE) $(build)=scripts/basic
614 622
615 PHONY += outputmakefile 623 PHONY += outputmakefile
616 ifdef building_out_of_srctree 624 ifdef building_out_of_srctree
617 # Before starting out-of-tree build, make sure 625 # Before starting out-of-tree build, make sure the source tree is clean.
618 # outputmakefile generates a Makefile in the o 626 # outputmakefile generates a Makefile in the output directory, if using a
619 # separate output directory. This allows conve 627 # separate output directory. This allows convenient use of make in the
620 # output directory. 628 # output directory.
621 # At the same time when output Makefile genera 629 # At the same time when output Makefile generated, generate .gitignore to
622 # ignore whole output directory 630 # ignore whole output directory
623 631
624 quiet_cmd_makefile = GEN Makefile 632 quiet_cmd_makefile = GEN Makefile
625 cmd_makefile = { \ 633 cmd_makefile = { \
626 echo "\# Automatically generated by $( 634 echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
627 echo "include $(srctree)/Makefile"; \ 635 echo "include $(srctree)/Makefile"; \
628 } > Makefile 636 } > Makefile
629 637
630 outputmakefile: 638 outputmakefile:
631 @if [ -f $(srctree)/.config -o \ 639 @if [ -f $(srctree)/.config -o \
632 -d $(srctree)/include/config 640 -d $(srctree)/include/config -o \
633 -d $(srctree)/arch/$(SRCARCH) 641 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
634 echo >&2 "***"; \ 642 echo >&2 "***"; \
635 echo >&2 "*** The source tree 643 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
636 echo >&2 "*** in $(abs_srctree 644 echo >&2 "*** in $(abs_srctree)";\
637 echo >&2 "***"; \ 645 echo >&2 "***"; \
638 false; \ 646 false; \
639 fi 647 fi
640 $(Q)ln -fsn $(srctree) source 648 $(Q)ln -fsn $(srctree) source
641 $(call cmd,makefile) 649 $(call cmd,makefile)
642 $(Q)test -e .gitignore || \ 650 $(Q)test -e .gitignore || \
643 { echo "# this is build directory, ign 651 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
644 endif 652 endif
645 653
646 # The expansion should be delayed until arch/$ 654 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
647 # Some architectures define CROSS_COMPILE in a 655 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
648 # CC_VERSION_TEXT and RUSTC_VERSION_TEXT are r !! 656 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
649 # need export), and from include/config/auto.c !! 657 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
650 # upgrade. <<
651 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC 658 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
652 RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell <<
653 659
654 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), 660 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
655 include $(srctree)/scripts/Makefile.clang 661 include $(srctree)/scripts/Makefile.clang
656 endif 662 endif
657 663
658 # Include this also for config targets because 664 # Include this also for config targets because some architectures need
659 # cc-cross-prefix to determine CROSS_COMPILE. 665 # cc-cross-prefix to determine CROSS_COMPILE.
660 ifdef need-compiler 666 ifdef need-compiler
661 include $(srctree)/scripts/Makefile.compiler 667 include $(srctree)/scripts/Makefile.compiler
662 endif 668 endif
663 669
664 ifdef config-build 670 ifdef config-build
665 # ============================================ 671 # ===========================================================================
666 # *config targets only - make sure prerequisit 672 # *config targets only - make sure prerequisites are updated, and descend
667 # in scripts/kconfig to make the *config targe 673 # in scripts/kconfig to make the *config target
668 674
669 # Read arch-specific Makefile to set KBUILD_DE 675 # Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed.
670 # KBUILD_DEFCONFIG may point out an alternativ 676 # KBUILD_DEFCONFIG may point out an alternative default configuration
671 # used for 'make defconfig' 677 # used for 'make defconfig'
672 include $(srctree)/arch/$(SRCARCH)/Makefile 678 include $(srctree)/arch/$(SRCARCH)/Makefile
673 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 679 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
674 680
675 config: outputmakefile scripts_basic FORCE 681 config: outputmakefile scripts_basic FORCE
676 $(Q)$(MAKE) $(build)=scripts/kconfig $ 682 $(Q)$(MAKE) $(build)=scripts/kconfig $@
677 683
678 %config: outputmakefile scripts_basic FORCE 684 %config: outputmakefile scripts_basic FORCE
679 $(Q)$(MAKE) $(build)=scripts/kconfig $ 685 $(Q)$(MAKE) $(build)=scripts/kconfig $@
680 686
681 else #!config-build 687 else #!config-build
682 # ============================================ 688 # ===========================================================================
683 # Build targets only - this includes vmlinux, 689 # Build targets only - this includes vmlinux, arch-specific targets, clean
684 # targets and others. In general all targets e 690 # targets and others. In general all targets except *config targets.
685 691
686 # If building an external module we do not car 692 # If building an external module we do not care about the all: rule
687 # but instead __all depend on modules 693 # but instead __all depend on modules
688 PHONY += all 694 PHONY += all
689 ifeq ($(KBUILD_EXTMOD),) 695 ifeq ($(KBUILD_EXTMOD),)
690 __all: all 696 __all: all
691 else 697 else
692 __all: modules 698 __all: modules
693 endif 699 endif
694 700
695 targets := 701 targets :=
696 702
697 # Decide whether to build built-in, modular, o 703 # Decide whether to build built-in, modular, or both.
698 # Normally, just do built-in. 704 # Normally, just do built-in.
699 705
700 KBUILD_MODULES := 706 KBUILD_MODULES :=
701 KBUILD_BUILTIN := 1 707 KBUILD_BUILTIN := 1
702 708
703 # If we have only "make modules", don't compil 709 # If we have only "make modules", don't compile built-in objects.
704 ifeq ($(MAKECMDGOALS),modules) 710 ifeq ($(MAKECMDGOALS),modules)
705 KBUILD_BUILTIN := 711 KBUILD_BUILTIN :=
706 endif 712 endif
707 713
708 # If we have "make <whatever> modules", compil 714 # If we have "make <whatever> modules", compile modules
709 # in addition to whatever we do anyway. 715 # in addition to whatever we do anyway.
710 # Just "make" or "make all" shall build module 716 # Just "make" or "make all" shall build modules as well
711 717
712 ifneq ($(filter all modules nsdeps %compile_co 718 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
713 KBUILD_MODULES := 1 719 KBUILD_MODULES := 1
714 endif 720 endif
715 721
716 ifeq ($(MAKECMDGOALS),) 722 ifeq ($(MAKECMDGOALS),)
717 KBUILD_MODULES := 1 723 KBUILD_MODULES := 1
718 endif 724 endif
719 725
720 export KBUILD_MODULES KBUILD_BUILTIN 726 export KBUILD_MODULES KBUILD_BUILTIN
721 727
722 ifdef need-config 728 ifdef need-config
723 include include/config/auto.conf 729 include include/config/auto.conf
724 endif 730 endif
725 731
726 ifeq ($(KBUILD_EXTMOD),) 732 ifeq ($(KBUILD_EXTMOD),)
727 # Objects we will link into vmlinux / subdirs 733 # Objects we will link into vmlinux / subdirs we need to visit
728 core-y := 734 core-y :=
729 drivers-y := 735 drivers-y :=
730 libs-y := lib/ 736 libs-y := lib/
731 endif # KBUILD_EXTMOD 737 endif # KBUILD_EXTMOD
732 738
733 # The all: target is the default when no targe 739 # The all: target is the default when no target is given on the
734 # command line. 740 # command line.
735 # This allow a user to issue only 'make' to bu 741 # This allow a user to issue only 'make' to build a kernel including modules
736 # Defaults to vmlinux, but the arch makefile u 742 # Defaults to vmlinux, but the arch makefile usually adds further targets
737 all: vmlinux 743 all: vmlinux
738 744
739 CFLAGS_GCOV := -fprofile-arcs -ftest-cover 745 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
740 ifdef CONFIG_CC_IS_GCC 746 ifdef CONFIG_CC_IS_GCC
741 CFLAGS_GCOV += -fno-tree-loop-im 747 CFLAGS_GCOV += -fno-tree-loop-im
742 endif 748 endif
743 export CFLAGS_GCOV 749 export CFLAGS_GCOV
744 750
745 # The arch Makefiles can override CC_FLAGS_FTR 751 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
746 ifdef CONFIG_FUNCTION_TRACER 752 ifdef CONFIG_FUNCTION_TRACER
747 CC_FLAGS_FTRACE := -pg 753 CC_FLAGS_FTRACE := -pg
748 endif 754 endif
749 755
750 include $(srctree)/arch/$(SRCARCH)/Makefile 756 include $(srctree)/arch/$(SRCARCH)/Makefile
751 757
752 ifdef need-config 758 ifdef need-config
753 ifdef may-sync-config 759 ifdef may-sync-config
754 # Read in dependencies to all Kconfig* files, 760 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
755 # changes are detected. This should be include 761 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
756 # because some architectures define CROSS_COMP 762 # because some architectures define CROSS_COMPILE there.
757 include include/config/auto.conf.cmd 763 include include/config/auto.conf.cmd
758 764
759 $(KCONFIG_CONFIG): 765 $(KCONFIG_CONFIG):
760 @echo >&2 '***' 766 @echo >&2 '***'
761 @echo >&2 '*** Configuration file "$@" 767 @echo >&2 '*** Configuration file "$@" not found!'
762 @echo >&2 '***' 768 @echo >&2 '***'
763 @echo >&2 '*** Please run some configu 769 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
764 @echo >&2 '*** "make menuconfig" or "m 770 @echo >&2 '*** "make menuconfig" or "make xconfig").'
765 @echo >&2 '***' 771 @echo >&2 '***'
766 @/bin/false 772 @/bin/false
767 773
768 # The actual configuration files used during t 774 # The actual configuration files used during the build are stored in
769 # include/generated/ and include/config/. Upda 775 # include/generated/ and include/config/. Update them if .config is newer than
770 # include/config/auto.conf (which mirrors .con 776 # include/config/auto.conf (which mirrors .config).
771 # 777 #
772 # This exploits the 'multi-target pattern rule 778 # This exploits the 'multi-target pattern rule' trick.
773 # The syncconfig should be executed only once 779 # The syncconfig should be executed only once to make all the targets.
774 # (Note: use the grouped target '&:' when we b 780 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
775 # 781 #
776 # Do not use $(call cmd,...) here. That would 782 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
777 # so you cannot notice that Kconfig is waiting 783 # so you cannot notice that Kconfig is waiting for the user input.
778 %/config/auto.conf %/config/auto.conf.cmd %/ge 784 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
779 $(Q)$(kecho) " SYNC $@" 785 $(Q)$(kecho) " SYNC $@"
780 $(Q)$(MAKE) -f $(srctree)/Makefile syn 786 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
781 else # !may-sync-config 787 else # !may-sync-config
782 # External modules and some install targets ne 788 # External modules and some install targets need include/generated/autoconf.h
783 # and include/config/auto.conf but do not care 789 # and include/config/auto.conf but do not care if they are up-to-date.
784 # Use auto.conf to trigger the test 790 # Use auto.conf to trigger the test
785 PHONY += include/config/auto.conf 791 PHONY += include/config/auto.conf
786 792
787 include/config/auto.conf: 793 include/config/auto.conf:
788 @test -e include/generated/autoconf.h 794 @test -e include/generated/autoconf.h -a -e $@ || ( \
789 echo >&2; 795 echo >&2; \
790 echo >&2 " ERROR: Kernel configuratio 796 echo >&2 " ERROR: Kernel configuration is invalid."; \
791 echo >&2 " include/generated/a 797 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
792 echo >&2 " Run 'make oldconfig 798 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
793 echo >&2 ; 799 echo >&2 ; \
794 /bin/false) 800 /bin/false)
795 801
796 endif # may-sync-config 802 endif # may-sync-config
797 endif # need-config 803 endif # need-config
798 804
799 KBUILD_CFLAGS += -fno-delete-null-pointer-ch 805 KBUILD_CFLAGS += -fno-delete-null-pointer-checks
800 806
801 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 807 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
802 KBUILD_CFLAGS += -O2 808 KBUILD_CFLAGS += -O2
803 KBUILD_RUSTFLAGS += -Copt-level=2 809 KBUILD_RUSTFLAGS += -Copt-level=2
804 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 810 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
805 KBUILD_CFLAGS += -Os 811 KBUILD_CFLAGS += -Os
806 KBUILD_RUSTFLAGS += -Copt-level=s 812 KBUILD_RUSTFLAGS += -Copt-level=s
807 endif 813 endif
808 814
809 # Always set `debug-assertions` and `overflow- 815 # Always set `debug-assertions` and `overflow-checks` because their default
810 # depends on `opt-level` and `debug-assertions 816 # depends on `opt-level` and `debug-assertions`, respectively.
811 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( 817 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
812 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C 818 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
813 819
814 # Tell gcc to never replace conditional load w 820 # Tell gcc to never replace conditional load with a non-conditional one
815 ifdef CONFIG_CC_IS_GCC 821 ifdef CONFIG_CC_IS_GCC
816 # gcc-10 renamed --param=allow-store-data-race 822 # gcc-10 renamed --param=allow-store-data-races=0 to
817 # -fno-allow-store-data-races. 823 # -fno-allow-store-data-races.
818 KBUILD_CFLAGS += $(call cc-option,--param=al 824 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
819 KBUILD_CFLAGS += $(call cc-option,-fno-allow 825 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
820 endif 826 endif
821 827
822 ifdef CONFIG_READABLE_ASM 828 ifdef CONFIG_READABLE_ASM
823 # Disable optimizations that make assembler li 829 # Disable optimizations that make assembler listings hard to read.
824 # reorder blocks reorders the control in the f 830 # reorder blocks reorders the control in the function
825 # ipa clone creates specialized cloned functio 831 # ipa clone creates specialized cloned functions
826 # partial inlining inlines only parts of funct 832 # partial inlining inlines only parts of functions
827 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- 833 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
828 endif 834 endif
829 835
830 stackp-flags-y 836 stackp-flags-y := -fno-stack-protector
831 stackp-flags-$(CONFIG_STACKPROTECTOR) 837 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
832 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 838 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
833 839
834 KBUILD_CFLAGS += $(stackp-flags-y) 840 KBUILD_CFLAGS += $(stackp-flags-y)
835 841
836 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning 842 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
837 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) 843 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
838 844
839 ifdef CONFIG_FRAME_POINTER 845 ifdef CONFIG_FRAME_POINTER
840 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 846 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
841 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y 847 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
842 else 848 else
843 # Some targets (ARM with Thumb2, for example), 849 # Some targets (ARM with Thumb2, for example), can't be built with frame
844 # pointers. For those, we don't have FUNCTION 850 # pointers. For those, we don't have FUNCTION_TRACER automatically
845 # select FRAME_POINTER. However, FUNCTION_TRA 851 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
846 # incompatible with -fomit-frame-pointer with 852 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
847 # -fomit-frame-pointer with FUNCTION_TRACER. 853 # -fomit-frame-pointer with FUNCTION_TRACER.
848 # In the Rust target specification, "frame-poi 854 # In the Rust target specification, "frame-pointer" is set explicitly
849 # to "may-omit". 855 # to "may-omit".
850 ifndef CONFIG_FUNCTION_TRACER 856 ifndef CONFIG_FUNCTION_TRACER
851 KBUILD_CFLAGS += -fomit-frame-pointer 857 KBUILD_CFLAGS += -fomit-frame-pointer
852 endif 858 endif
853 endif 859 endif
854 860
855 # Initialize all stack variables with a 0xAA p 861 # Initialize all stack variables with a 0xAA pattern.
856 ifdef CONFIG_INIT_STACK_ALL_PATTERN 862 ifdef CONFIG_INIT_STACK_ALL_PATTERN
857 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 863 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
858 endif 864 endif
859 865
860 # Initialize all stack variables with a zero v 866 # Initialize all stack variables with a zero value.
861 ifdef CONFIG_INIT_STACK_ALL_ZERO 867 ifdef CONFIG_INIT_STACK_ALL_ZERO
862 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer 868 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
863 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 869 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
864 # https://github.com/llvm/llvm-project/issues/ 870 # https://github.com/llvm/llvm-project/issues/44842
865 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi 871 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
866 export CC_AUTO_VAR_INIT_ZERO_ENABLER 872 export CC_AUTO_VAR_INIT_ZERO_ENABLER
867 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA 873 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER)
868 endif 874 endif
869 endif 875 endif
870 876
871 # While VLAs have been removed, GCC produces u 877 # While VLAs have been removed, GCC produces unreachable stack probes
872 # for the randomize_kstack_offset feature. Dis 878 # for the randomize_kstack_offset feature. Disable it for all compilers.
873 KBUILD_CFLAGS += $(call cc-option, -fno-stac 879 KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
874 880
875 # Clear used registers at func exit (to reduce 881 # Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
876 ifdef CONFIG_ZERO_CALL_USED_REGS 882 ifdef CONFIG_ZERO_CALL_USED_REGS
877 KBUILD_CFLAGS += -fzero-call-used-regs=used- 883 KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr
878 endif 884 endif
879 885
880 ifdef CONFIG_FUNCTION_TRACER 886 ifdef CONFIG_FUNCTION_TRACER
881 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 887 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
882 CC_FLAGS_FTRACE += -mrecord-mcount 888 CC_FLAGS_FTRACE += -mrecord-mcount
883 ifdef CONFIG_HAVE_NOP_MCOUNT 889 ifdef CONFIG_HAVE_NOP_MCOUNT
884 ifeq ($(call cc-option-yn, -mnop-mcount),y 890 ifeq ($(call cc-option-yn, -mnop-mcount),y)
885 CC_FLAGS_FTRACE += -mnop-mcount 891 CC_FLAGS_FTRACE += -mnop-mcount
886 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 892 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
887 endif 893 endif
888 endif 894 endif
889 endif 895 endif
890 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 896 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
891 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT 897 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT
892 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 898 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
893 endif 899 endif
894 endif 900 endif
895 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 901 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
896 ifdef CONFIG_HAVE_C_RECORDMCOUNT 902 ifdef CONFIG_HAVE_C_RECORDMCOUNT
897 BUILD_C_RECORDMCOUNT := y 903 BUILD_C_RECORDMCOUNT := y
898 export BUILD_C_RECORDMCOUNT 904 export BUILD_C_RECORDMCOUNT
899 endif 905 endif
900 endif 906 endif
901 ifdef CONFIG_HAVE_FENTRY 907 ifdef CONFIG_HAVE_FENTRY
902 # s390-linux-gnu-gcc did not support -mfentr 908 # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
903 ifeq ($(call cc-option-yn, -mfentry),y) 909 ifeq ($(call cc-option-yn, -mfentry),y)
904 CC_FLAGS_FTRACE += -mfentry 910 CC_FLAGS_FTRACE += -mfentry
905 CC_FLAGS_USING += -DCC_USING_FENTRY 911 CC_FLAGS_USING += -DCC_USING_FENTRY
906 endif 912 endif
907 endif 913 endif
908 export CC_FLAGS_FTRACE 914 export CC_FLAGS_FTRACE
909 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 915 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
910 KBUILD_AFLAGS += $(CC_FLAGS_USING) 916 KBUILD_AFLAGS += $(CC_FLAGS_USING)
911 endif 917 endif
912 918
913 # We trigger additional mismatches with less i 919 # We trigger additional mismatches with less inlining
914 ifdef CONFIG_DEBUG_SECTION_MISMATCH 920 ifdef CONFIG_DEBUG_SECTION_MISMATCH
915 KBUILD_CFLAGS += -fno-inline-functions-called- 921 KBUILD_CFLAGS += -fno-inline-functions-called-once
916 endif 922 endif
917 923
918 # `rustc`'s `-Zfunction-sections` applies to d 924 # `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
919 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 925 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
920 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 926 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
921 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections 927 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
922 LDFLAGS_vmlinux += --gc-sections 928 LDFLAGS_vmlinux += --gc-sections
923 endif 929 endif
924 930
925 ifdef CONFIG_SHADOW_CALL_STACK 931 ifdef CONFIG_SHADOW_CALL_STACK
926 ifndef CONFIG_DYNAMIC_SCS 932 ifndef CONFIG_DYNAMIC_SCS
927 CC_FLAGS_SCS := -fsanitize=shadow-call-stac 933 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
928 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 934 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
929 KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-st <<
930 endif 935 endif
931 export CC_FLAGS_SCS 936 export CC_FLAGS_SCS
932 endif 937 endif
933 938
934 ifdef CONFIG_LTO_CLANG 939 ifdef CONFIG_LTO_CLANG
935 ifdef CONFIG_LTO_CLANG_THIN 940 ifdef CONFIG_LTO_CLANG_THIN
936 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 941 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
>> 942 KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
937 else 943 else
938 CC_FLAGS_LTO := -flto 944 CC_FLAGS_LTO := -flto
939 endif 945 endif
940 CC_FLAGS_LTO += -fvisibility=hidden 946 CC_FLAGS_LTO += -fvisibility=hidden
941 947
942 # Limit inlining across translation units to r 948 # Limit inlining across translation units to reduce binary size
943 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 949 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
>> 950
>> 951 # Check for frame size exceeding threshold during prolog/epilog insertion
>> 952 # when using lld < 13.0.0.
>> 953 ifneq ($(CONFIG_FRAME_WARN),0)
>> 954 ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y)
>> 955 KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
>> 956 endif
>> 957 endif
944 endif 958 endif
945 959
946 ifdef CONFIG_LTO 960 ifdef CONFIG_LTO
947 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 961 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
948 KBUILD_AFLAGS += -fno-lto 962 KBUILD_AFLAGS += -fno-lto
949 export CC_FLAGS_LTO 963 export CC_FLAGS_LTO
950 endif 964 endif
951 965
952 ifdef CONFIG_CFI_CLANG 966 ifdef CONFIG_CFI_CLANG
953 CC_FLAGS_CFI := -fsanitize=kcfi 967 CC_FLAGS_CFI := -fsanitize=kcfi
954 ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS <<
955 CC_FLAGS_CFI += -fsanitize-cfi-ical <<
956 endif <<
957 ifdef CONFIG_RUST <<
958 # Always pass -Zsanitizer-cfi-normaliz <<
959 # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. <<
960 RUSTC_FLAGS_CFI := -Zsanitizer=kcfi <<
961 KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) <<
962 export RUSTC_FLAGS_CFI <<
963 endif <<
964 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 968 KBUILD_CFLAGS += $(CC_FLAGS_CFI)
965 export CC_FLAGS_CFI 969 export CC_FLAGS_CFI
966 endif 970 endif
967 971
968 # Architectures can define flags to add/remove <<
969 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN <<
970 export CC_FLAGS_FPU <<
971 export CC_FLAGS_NO_FPU <<
972 <<
973 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 972 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)
974 # Set the minimal function alignment. Use the <<
975 # -fmin-function-alignment if it is available, <<
976 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
977 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
978 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
979 else <<
980 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU 973 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT)
981 endif 974 endif
982 endif <<
983 975
984 # arch Makefile may override CC so keep this a 976 # arch Makefile may override CC so keep this after arch Makefile is included
985 NOSTDINC_FLAGS += -nostdinc 977 NOSTDINC_FLAGS += -nostdinc
986 978
987 # To gain proper coverage for CONFIG_UBSAN_BOU 979 # To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE,
988 # the kernel uses only C99 flexible arrays for 980 # the kernel uses only C99 flexible arrays for dynamically sized trailing
989 # arrays. Enforce this for everything that may 981 # arrays. Enforce this for everything that may examine structure sizes and
990 # perform bounds checking. 982 # perform bounds checking.
991 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl 983 KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)
992 984
993 #Currently, disable -Wstringop-overflow for GC <<
994 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW <<
995 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + <<
996 <<
997 # disable invalid "can't wrap" optimizations f 985 # disable invalid "can't wrap" optimizations for signed / pointers
998 KBUILD_CFLAGS += -fno-strict-overflow 986 KBUILD_CFLAGS += -fno-strict-overflow
999 987
1000 # Make sure -fstack-check isn't enabled (like 988 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
1001 KBUILD_CFLAGS += -fno-stack-check 989 KBUILD_CFLAGS += -fno-stack-check
1002 990
1003 # conserve stack if available 991 # conserve stack if available
1004 ifdef CONFIG_CC_IS_GCC 992 ifdef CONFIG_CC_IS_GCC
1005 KBUILD_CFLAGS += -fconserve-stack 993 KBUILD_CFLAGS += -fconserve-stack
1006 endif 994 endif
1007 995
1008 # change __FILE__ to the relative path from t 996 # change __FILE__ to the relative path from the srctree
1009 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p 997 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1010 998
1011 # include additional Makefiles when needed 999 # include additional Makefiles when needed
1012 include-y := scripts/Ma 1000 include-y := scripts/Makefile.extrawarn
1013 include-$(CONFIG_DEBUG_INFO) += scripts/Ma 1001 include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug
1014 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma 1002 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf
1015 include-$(CONFIG_KASAN) += scripts/Ma 1003 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
1016 include-$(CONFIG_KCSAN) += scripts/Ma 1004 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
1017 include-$(CONFIG_KMSAN) += scripts/Ma 1005 include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan
1018 include-$(CONFIG_UBSAN) += scripts/Ma 1006 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
1019 include-$(CONFIG_KCOV) += scripts/Ma 1007 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
1020 include-$(CONFIG_RANDSTRUCT) += scripts/Ma 1008 include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct
1021 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma 1009 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
1022 1010
1023 include $(addprefix $(srctree)/, $(include-y) 1011 include $(addprefix $(srctree)/, $(include-y))
1024 1012
1025 # scripts/Makefile.gcc-plugins is intentional 1013 # scripts/Makefile.gcc-plugins is intentionally included last.
1026 # Do not add $(call cc-option,...) below this 1014 # Do not add $(call cc-option,...) below this line. When you build the kernel
1027 # from the clean source tree, the GCC plugins 1015 # from the clean source tree, the GCC plugins do not exist at this point.
1028 1016
1029 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS 1017 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
1030 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1018 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1031 KBUILD_AFLAGS += $(KAFLAGS) 1019 KBUILD_AFLAGS += $(KAFLAGS)
1032 KBUILD_CFLAGS += $(KCFLAGS) 1020 KBUILD_CFLAGS += $(KCFLAGS)
1033 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) 1021 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)
1034 1022
1035 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1023 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1036 LDFLAGS_vmlinux += --build-id=sha1 1024 LDFLAGS_vmlinux += --build-id=sha1
1037 1025
1038 KBUILD_LDFLAGS += -z noexecstack 1026 KBUILD_LDFLAGS += -z noexecstack
1039 ifeq ($(CONFIG_LD_IS_BFD),y) 1027 ifeq ($(CONFIG_LD_IS_BFD),y)
1040 KBUILD_LDFLAGS += $(call ld-option,--no-warn 1028 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
1041 endif 1029 endif
1042 1030
1043 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1031 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1044 LDFLAGS_vmlinux += -X 1032 LDFLAGS_vmlinux += -X
1045 endif 1033 endif
1046 1034
1047 ifeq ($(CONFIG_RELR),y) 1035 ifeq ($(CONFIG_RELR),y)
1048 # ld.lld before 15 did not support -z pack-re 1036 # ld.lld before 15 did not support -z pack-relative-relocs.
1049 LDFLAGS_vmlinux += $(call ld-option,--pack-dy 1037 LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs)
1050 endif 1038 endif
1051 1039
1052 # We never want expected sections to be place 1040 # We never want expected sections to be placed heuristically by the
1053 # linker. All sections should be explicitly n 1041 # linker. All sections should be explicitly named in the linker script.
1054 ifdef CONFIG_LD_ORPHAN_WARN 1042 ifdef CONFIG_LD_ORPHAN_WARN
1055 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG 1043 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
1056 endif 1044 endif
1057 1045
1058 # Align the bit size of userspace programs wi 1046 # Align the bit size of userspace programs with the kernel
1059 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta 1047 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1060 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta 1048 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1061 1049
1062 # make the checker run with the right archite 1050 # make the checker run with the right architecture
1063 CHECKFLAGS += --arch=$(ARCH) 1051 CHECKFLAGS += --arch=$(ARCH)
1064 1052
1065 # insure the checker run with the right endia 1053 # insure the checker run with the right endianness
1066 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 1054 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1067 1055
1068 # the checker needs the correct machine size 1056 # the checker needs the correct machine size
1069 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1057 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1070 1058
1071 # Default kernel image to build when no speci 1059 # Default kernel image to build when no specific target is given.
1072 # KBUILD_IMAGE may be overruled on the comman 1060 # KBUILD_IMAGE may be overruled on the command line or
1073 # set in the environment 1061 # set in the environment
1074 # Also any assignments in arch/$(ARCH)/Makefi 1062 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1075 # this default value 1063 # this default value
1076 export KBUILD_IMAGE ?= vmlinux 1064 export KBUILD_IMAGE ?= vmlinux
1077 1065
1078 # 1066 #
1079 # INSTALL_PATH specifies where to place the u 1067 # INSTALL_PATH specifies where to place the updated kernel and system map
1080 # images. Default is /boot, but you can set i 1068 # images. Default is /boot, but you can set it to other values
1081 export INSTALL_PATH ?= /boot 1069 export INSTALL_PATH ?= /boot
1082 1070
1083 # 1071 #
1084 # INSTALL_DTBS_PATH specifies a prefix for re 1072 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1085 # Like INSTALL_MOD_PATH, it isn't defined in 1073 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1086 # an argument if needed. Otherwise it default 1074 # an argument if needed. Otherwise it defaults to the kernel install path
1087 # 1075 #
1088 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 1076 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1089 1077
1090 # 1078 #
1091 # INSTALL_MOD_PATH specifies a prefix to MODL 1079 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1092 # relocations required by build roots. This 1080 # relocations required by build roots. This is not defined in the
1093 # makefile but the argument can be passed to 1081 # makefile but the argument can be passed to make if needed.
1094 # 1082 #
1095 1083
1096 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 1084 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1097 export MODLIB 1085 export MODLIB
1098 1086
1099 PHONY += prepare0 1087 PHONY += prepare0
1100 1088
1101 export extmod_prefix = $(if $(KBUILD_EXTMOD), 1089 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1102 export MODORDER := $(extmod_prefix)modules.or 1090 export MODORDER := $(extmod_prefix)modules.order
1103 export MODULES_NSDEPS := $(extmod_prefix)modu 1091 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1104 1092
1105 ifeq ($(KBUILD_EXTMOD),) 1093 ifeq ($(KBUILD_EXTMOD),)
1106 1094
1107 build-dir := . 1095 build-dir := .
1108 clean-dirs := $(sort . Documentation \ 1096 clean-dirs := $(sort . Documentation \
1109 $(patsubst %/,%,$(filter 1097 $(patsubst %/,%,$(filter %/, $(core-) \
1110 $(drivers-) $(libs-)) 1098 $(drivers-) $(libs-))))
1111 1099
1112 export ARCH_CORE := $(core-y) 1100 export ARCH_CORE := $(core-y)
1113 export ARCH_LIB := $(filter %/, $(lib 1101 export ARCH_LIB := $(filter %/, $(libs-y))
1114 export ARCH_DRIVERS := $(drivers-y) $(dri 1102 export ARCH_DRIVERS := $(drivers-y) $(drivers-m)
1115 # Externally visible symbols (used by link-vm 1103 # Externally visible symbols (used by link-vmlinux.sh)
1116 1104
1117 KBUILD_VMLINUX_OBJS := ./built-in.a 1105 KBUILD_VMLINUX_OBJS := ./built-in.a
1118 ifdef CONFIG_MODULES 1106 ifdef CONFIG_MODULES
1119 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a 1107 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1120 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib 1108 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1121 else 1109 else
1122 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, 1110 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1123 endif 1111 endif
1124 1112
1125 export KBUILD_VMLINUX_LIBS 1113 export KBUILD_VMLINUX_LIBS
1126 export KBUILD_LDS := arch/$(SRCARCH) 1114 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1127 1115
1128 ifdef CONFIG_TRIM_UNUSED_KSYMS 1116 ifdef CONFIG_TRIM_UNUSED_KSYMS
1129 # For the kernel to actually contain only the 1117 # For the kernel to actually contain only the needed exported symbols,
1130 # we have to build modules as well to determi 1118 # we have to build modules as well to determine what those symbols are.
1131 KBUILD_MODULES := 1 1119 KBUILD_MODULES := 1
1132 endif 1120 endif
1133 1121
1134 # '$(AR) mPi' needs 'T' to workaround the bug 1122 # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
1135 quiet_cmd_ar_vmlinux.a = AR $@ 1123 quiet_cmd_ar_vmlinux.a = AR $@
1136 cmd_ar_vmlinux.a = \ 1124 cmd_ar_vmlinux.a = \
1137 rm -f $@; \ 1125 rm -f $@; \
1138 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS 1126 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
1139 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) 1127 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
1140 1128
1141 targets += vmlinux.a 1129 targets += vmlinux.a
1142 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea 1130 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
1143 $(call if_changed,ar_vmlinux.a) 1131 $(call if_changed,ar_vmlinux.a)
1144 1132
1145 PHONY += vmlinux_o 1133 PHONY += vmlinux_o
1146 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) 1134 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)
1147 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1135 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o
1148 1136
1149 vmlinux.o modules.builtin.modinfo modules.bui 1137 vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
1150 @: 1138 @:
1151 1139
1152 PHONY += vmlinux 1140 PHONY += vmlinux
1153 # LDFLAGS_vmlinux in the top Makefile defines 1141 # LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux,
1154 # not for decompressors. LDFLAGS_vmlinux in a 1142 # not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is
1155 # unrelated; the decompressors just happen to 1143 # unrelated; the decompressors just happen to have the same base name,
1156 # arch/*/boot/compressed/vmlinux. 1144 # arch/*/boot/compressed/vmlinux.
1157 # Export LDFLAGS_vmlinux only to scripts/Make 1145 # Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux.
1158 # 1146 #
1159 # _LDFLAGS_vmlinux is a workaround for the 'p 1147 # _LDFLAGS_vmlinux is a workaround for the 'private export' bug:
1160 # https://savannah.gnu.org/bugs/?61463 1148 # https://savannah.gnu.org/bugs/?61463
1161 # For Make > 4.4, the following simple code w 1149 # For Make > 4.4, the following simple code will work:
1162 # vmlinux: private export LDFLAGS_vmlinux := 1150 # vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
1163 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG 1151 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
1164 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ 1152 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux)
1165 vmlinux: vmlinux.o $(KBUILD_LDS) modpost 1153 vmlinux: vmlinux.o $(KBUILD_LDS) modpost
1166 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1154 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
1167 1155
1168 # The actual objects are generated when desce 1156 # The actual objects are generated when descending,
1169 # make sure no implicit rule kicks in 1157 # make sure no implicit rule kicks in
1170 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ 1158 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ;
1171 1159
1172 ifeq ($(origin KERNELRELEASE),file) 1160 ifeq ($(origin KERNELRELEASE),file)
1173 filechk_kernel.release = $(srctree)/scripts/s 1161 filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree)
1174 else 1162 else
1175 filechk_kernel.release = echo $(KERNELRELEASE 1163 filechk_kernel.release = echo $(KERNELRELEASE)
1176 endif 1164 endif
1177 1165
1178 # Store (new) KERNELRELEASE string in include 1166 # Store (new) KERNELRELEASE string in include/config/kernel.release
1179 include/config/kernel.release: FORCE 1167 include/config/kernel.release: FORCE
1180 $(call filechk,kernel.release) 1168 $(call filechk,kernel.release)
1181 1169
1182 # Additional helpers built in scripts/ 1170 # Additional helpers built in scripts/
1183 # Carefully list dependencies so we do not tr 1171 # Carefully list dependencies so we do not try to build scripts twice
1184 # in parallel 1172 # in parallel
1185 PHONY += scripts 1173 PHONY += scripts
1186 scripts: scripts_basic scripts_dtc 1174 scripts: scripts_basic scripts_dtc
1187 $(Q)$(MAKE) $(build)=$(@) 1175 $(Q)$(MAKE) $(build)=$(@)
1188 1176
1189 # Things we need to do before we recursively 1177 # Things we need to do before we recursively start building the kernel
1190 # or the modules are listed in "prepare". 1178 # or the modules are listed in "prepare".
1191 # A multi level approach is used. prepareN is 1179 # A multi level approach is used. prepareN is processed before prepareN-1.
1192 # archprepare is used in arch Makefiles and w 1180 # archprepare is used in arch Makefiles and when processed asm symlink,
1193 # version.h and scripts_basic is processed / 1181 # version.h and scripts_basic is processed / created.
1194 1182
1195 PHONY += prepare archprepare 1183 PHONY += prepare archprepare
1196 1184
1197 archprepare: outputmakefile archheaders archs 1185 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1198 asm-generic $(version_h) include/gene 1186 asm-generic $(version_h) include/generated/utsrelease.h \
1199 include/generated/compile.h include/g 1187 include/generated/compile.h include/generated/autoconf.h remove-stale-files
1200 1188
1201 prepare0: archprepare 1189 prepare0: archprepare
1202 $(Q)$(MAKE) $(build)=scripts/mod 1190 $(Q)$(MAKE) $(build)=scripts/mod
1203 $(Q)$(MAKE) $(build)=. prepare 1191 $(Q)$(MAKE) $(build)=. prepare
1204 1192
1205 # All the preparing.. 1193 # All the preparing..
1206 prepare: prepare0 1194 prepare: prepare0
1207 ifdef CONFIG_RUST 1195 ifdef CONFIG_RUST
1208 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip !! 1196 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh
1209 $(Q)$(MAKE) $(build)=rust 1197 $(Q)$(MAKE) $(build)=rust
1210 endif 1198 endif
1211 1199
1212 PHONY += remove-stale-files 1200 PHONY += remove-stale-files
1213 remove-stale-files: 1201 remove-stale-files:
1214 $(Q)$(srctree)/scripts/remove-stale-f 1202 $(Q)$(srctree)/scripts/remove-stale-files
1215 1203
1216 # Support for using generic headers in asm-ge 1204 # Support for using generic headers in asm-generic
1217 asm-generic := -f $(srctree)/scripts/Makefile !! 1205 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1218 1206
1219 PHONY += asm-generic uapi-asm-generic 1207 PHONY += asm-generic uapi-asm-generic
1220 asm-generic: uapi-asm-generic 1208 asm-generic: uapi-asm-generic
1221 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1209 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1222 generic=include/asm-generic 1210 generic=include/asm-generic
1223 uapi-asm-generic: 1211 uapi-asm-generic:
1224 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1225 generic=include/uapi/asm-generic 1213 generic=include/uapi/asm-generic
1226 1214
1227 # Generate some files 1215 # Generate some files
1228 # ------------------------------------------- 1216 # ---------------------------------------------------------------------------
1229 1217
1230 # KERNELRELEASE can change from a few differe 1218 # KERNELRELEASE can change from a few different places, meaning version.h
1231 # needs to be updated, so this check is force 1219 # needs to be updated, so this check is forced on all builds
1232 1220
1233 uts_len := 64 1221 uts_len := 64
1234 define filechk_utsrelease.h 1222 define filechk_utsrelease.h
1235 if [ `echo -n "$(KERNELRELEASE)" | wc 1223 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1236 echo '"$(KERNELRELEASE)" exceeds $( 1224 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1237 exit 1; 1225 exit 1; \
1238 fi; 1226 fi; \
1239 echo \#define UTS_RELEASE \"$(KERNELR 1227 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1240 endef 1228 endef
1241 1229
1242 define filechk_version.h 1230 define filechk_version.h
1243 if [ $(SUBLEVEL) -gt 255 ]; then 1231 if [ $(SUBLEVEL) -gt 255 ]; then \
1244 echo \#define LINUX_VERSION_C 1232 echo \#define LINUX_VERSION_CODE $(shell \
1245 expr $(VERSION) \* 65536 + $( 1233 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1246 else 1234 else \
1247 echo \#define LINUX_VERSION_C 1235 echo \#define LINUX_VERSION_CODE $(shell \
1248 expr $(VERSION) \* 65536 + $( 1236 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1249 fi; 1237 fi; \
1250 echo '#define KERNEL_VERSION(a,b,c) ( 1238 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
1251 ((c) > 255 ? 255 : (c)))'; 1239 ((c) > 255 ? 255 : (c)))'; \
1252 echo \#define LINUX_VERSION_MAJOR $(V 1240 echo \#define LINUX_VERSION_MAJOR $(VERSION); \
1253 echo \#define LINUX_VERSION_PATCHLEVE 1241 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
1254 echo \#define LINUX_VERSION_SUBLEVEL 1242 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1255 endef 1243 endef
1256 1244
1257 $(version_h): private PATCHLEVEL := $(or $(PA !! 1245 $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
1258 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1246 $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
1259 $(version_h): FORCE 1247 $(version_h): FORCE
1260 $(call filechk,version.h) 1248 $(call filechk,version.h)
1261 1249
1262 include/generated/utsrelease.h: include/confi 1250 include/generated/utsrelease.h: include/config/kernel.release FORCE
1263 $(call filechk,utsrelease.h) 1251 $(call filechk,utsrelease.h)
1264 1252
1265 filechk_compile.h = $(srctree)/scripts/mkcomp 1253 filechk_compile.h = $(srctree)/scripts/mkcompile_h \
1266 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION 1254 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)"
1267 1255
1268 include/generated/compile.h: FORCE 1256 include/generated/compile.h: FORCE
1269 $(call filechk,compile.h) 1257 $(call filechk,compile.h)
1270 1258
1271 PHONY += headerdep 1259 PHONY += headerdep
1272 headerdep: 1260 headerdep:
1273 $(Q)find $(srctree)/include/ -name '* 1261 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1274 $(srctree)/scripts/headerdep.pl -I$(s 1262 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1275 1263
1276 # ------------------------------------------- 1264 # ---------------------------------------------------------------------------
1277 # Kernel headers 1265 # Kernel headers
1278 1266
1279 #Default location for installed headers 1267 #Default location for installed headers
1280 export INSTALL_HDR_PATH = $(objtree)/usr 1268 export INSTALL_HDR_PATH = $(objtree)/usr
1281 1269
1282 quiet_cmd_headers_install = INSTALL $(INSTALL 1270 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1283 cmd_headers_install = \ 1271 cmd_headers_install = \
1284 mkdir -p $(INSTALL_HDR_PATH); \ 1272 mkdir -p $(INSTALL_HDR_PATH); \
1285 rsync -mrl --include='*/' --include=' 1273 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1286 usr/include $(INSTALL_HDR_PATH) 1274 usr/include $(INSTALL_HDR_PATH)
1287 1275
1288 PHONY += headers_install 1276 PHONY += headers_install
1289 headers_install: headers 1277 headers_install: headers
1290 $(call cmd,headers_install) 1278 $(call cmd,headers_install)
1291 1279
1292 PHONY += archheaders archscripts 1280 PHONY += archheaders archscripts
1293 1281
1294 hdr-inst := -f $(srctree)/scripts/Makefile.he 1282 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1295 1283
1296 PHONY += headers 1284 PHONY += headers
1297 headers: $(version_h) scripts_unifdef uapi-as 1285 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1298 $(if $(filter um, $(SRCARCH)), $(erro 1286 $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
1299 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1287 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1300 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1288 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1301 1289
1302 ifdef CONFIG_HEADERS_INSTALL 1290 ifdef CONFIG_HEADERS_INSTALL
1303 prepare: headers 1291 prepare: headers
1304 endif 1292 endif
1305 1293
1306 PHONY += scripts_unifdef 1294 PHONY += scripts_unifdef
1307 scripts_unifdef: scripts_basic 1295 scripts_unifdef: scripts_basic
1308 $(Q)$(MAKE) $(build)=scripts scripts/ 1296 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1309 1297
1310 # ------------------------------------------- 1298 # ---------------------------------------------------------------------------
1311 # Install 1299 # Install
1312 1300
1313 # Many distributions have the custom install 1301 # Many distributions have the custom install script, /sbin/installkernel.
1314 # If DKMS is installed, 'make install' will e 1302 # If DKMS is installed, 'make install' will eventually recurse back
1315 # to this Makefile to build and install exter 1303 # to this Makefile to build and install external modules.
1316 # Cancel sub_make_done so that options such a 1304 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1317 1305
1318 quiet_cmd_install = INSTALL $(INSTALL_PATH) 1306 quiet_cmd_install = INSTALL $(INSTALL_PATH)
1319 cmd_install = unset sub_make_done; $(sr 1307 cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
1320 1308
1321 # ------------------------------------------- 1309 # ---------------------------------------------------------------------------
1322 # vDSO install 1310 # vDSO install
1323 1311
1324 PHONY += vdso_install 1312 PHONY += vdso_install
1325 vdso_install: export INSTALL_FILES = $(vdso-i 1313 vdso_install: export INSTALL_FILES = $(vdso-install-y)
1326 vdso_install: 1314 vdso_install:
1327 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1315 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst
1328 1316
1329 # ------------------------------------------- 1317 # ---------------------------------------------------------------------------
1330 # Tools 1318 # Tools
1331 1319
1332 ifdef CONFIG_OBJTOOL 1320 ifdef CONFIG_OBJTOOL
1333 prepare: tools/objtool 1321 prepare: tools/objtool
1334 endif 1322 endif
1335 1323
1336 ifdef CONFIG_BPF 1324 ifdef CONFIG_BPF
1337 ifdef CONFIG_DEBUG_INFO_BTF 1325 ifdef CONFIG_DEBUG_INFO_BTF
1338 prepare: tools/bpf/resolve_btfids 1326 prepare: tools/bpf/resolve_btfids
1339 endif 1327 endif
1340 endif 1328 endif
1341 1329
1342 # The tools build system is not a part of Kbu <<
1343 # its own unique issues. If you need to integ <<
1344 # please consider locating that tool outside <<
1345 # standard Kbuild "hostprogs" syntax instead <<
1346 # here. See Documentation/kbuild/makefiles.rs <<
1347 <<
1348 PHONY += resolve_btfids_clean 1330 PHONY += resolve_btfids_clean
1349 1331
1350 resolve_btfids_O = $(abspath $(objtree))/tool 1332 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1351 1333
1352 # tools/bpf/resolve_btfids directory might no 1334 # tools/bpf/resolve_btfids directory might not exist
1353 # in output directory, skip its clean in that 1335 # in output directory, skip its clean in that case
1354 resolve_btfids_clean: 1336 resolve_btfids_clean:
1355 ifneq ($(wildcard $(resolve_btfids_O)),) 1337 ifneq ($(wildcard $(resolve_btfids_O)),)
1356 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ 1338 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1357 endif 1339 endif
1358 1340
1359 # Clear a bunch of variables before executing 1341 # Clear a bunch of variables before executing the submake
1360 ifeq ($(quiet),silent_) 1342 ifeq ($(quiet),silent_)
1361 tools_silent=s 1343 tools_silent=s
1362 endif 1344 endif
1363 1345
1364 tools/: FORCE 1346 tools/: FORCE
1365 $(Q)mkdir -p $(objtree)/tools 1347 $(Q)mkdir -p $(objtree)/tools
1366 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1348 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1367 1349
1368 tools/%: FORCE 1350 tools/%: FORCE
1369 $(Q)mkdir -p $(objtree)/tools 1351 $(Q)mkdir -p $(objtree)/tools
1370 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1352 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1371 1353
1372 # ------------------------------------------- 1354 # ---------------------------------------------------------------------------
1373 # Kernel selftest 1355 # Kernel selftest
1374 1356
1375 PHONY += kselftest 1357 PHONY += kselftest
1376 kselftest: headers 1358 kselftest: headers
1377 $(Q)$(MAKE) -C $(srctree)/tools/testi 1359 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1378 1360
1379 kselftest-%: headers FORCE 1361 kselftest-%: headers FORCE
1380 $(Q)$(MAKE) -C $(srctree)/tools/testi 1362 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1381 1363
1382 PHONY += kselftest-merge 1364 PHONY += kselftest-merge
1383 kselftest-merge: 1365 kselftest-merge:
1384 $(if $(wildcard $(objtree)/.config),, 1366 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1385 $(Q)find $(srctree)/tools/testing/sel 1367 $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \
1386 xargs $(srctree)/scripts/kcon 1368 xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config
1387 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1369 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1388 1370
1389 # ------------------------------------------- 1371 # ---------------------------------------------------------------------------
1390 # Devicetree files 1372 # Devicetree files
1391 1373
1392 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1374 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1393 dtstree := arch/$(SRCARCH)/boot/dts 1375 dtstree := arch/$(SRCARCH)/boot/dts
1394 endif 1376 endif
1395 1377
1396 ifneq ($(dtstree),) 1378 ifneq ($(dtstree),)
1397 1379
1398 %.dtb: dtbs_prepare 1380 %.dtb: dtbs_prepare
1399 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1381 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1400 1382
1401 %.dtbo: dtbs_prepare 1383 %.dtbo: dtbs_prepare
1402 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1384 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1403 1385
1404 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ 1386 PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
1405 dtbs: dtbs_prepare 1387 dtbs: dtbs_prepare
1406 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1388 $(Q)$(MAKE) $(build)=$(dtstree)
1407 1389
1408 # include/config/kernel.release is actually n 1390 # include/config/kernel.release is actually needed when installing DTBs because
1409 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) 1391 # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
1410 # dtbs_install depend on it as dtbs_install m 1392 # dtbs_install depend on it as dtbs_install may run as root.
1411 dtbs_prepare: include/config/kernel.release s 1393 dtbs_prepare: include/config/kernel.release scripts_dtc
1412 1394
1413 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1395 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1414 export CHECK_DTBS=y 1396 export CHECK_DTBS=y
1415 endif 1397 endif
1416 1398
1417 ifneq ($(CHECK_DTBS),) 1399 ifneq ($(CHECK_DTBS),)
1418 dtbs_prepare: dt_binding_schemas !! 1400 dtbs_prepare: dt_binding_check
1419 endif 1401 endif
1420 1402
1421 dtbs_check: dtbs 1403 dtbs_check: dtbs
1422 1404
1423 dtbs_install: 1405 dtbs_install:
1424 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1406 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1425 1407
1426 ifdef CONFIG_OF_EARLY_FLATTREE 1408 ifdef CONFIG_OF_EARLY_FLATTREE
1427 all: dtbs 1409 all: dtbs
1428 endif 1410 endif
1429 1411
1430 endif 1412 endif
1431 1413
1432 PHONY += scripts_dtc 1414 PHONY += scripts_dtc
1433 scripts_dtc: scripts_basic 1415 scripts_dtc: scripts_basic
1434 $(Q)$(MAKE) $(build)=scripts/dtc 1416 $(Q)$(MAKE) $(build)=scripts/dtc
1435 1417
1436 ifneq ($(filter dt_binding_check, $(MAKECMDGO 1418 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1437 export CHECK_DTBS=y !! 1419 export CHECK_DT_BINDING=y
1438 endif 1420 endif
1439 1421
1440 PHONY += dt_binding_check dt_binding_schemas !! 1422 PHONY += dt_binding_check
1441 dt_binding_check: dt_binding_schemas scripts_ !! 1423 dt_binding_check: scripts_dtc
1442 $(Q)$(MAKE) $(build)=Documentation/de <<
1443 <<
1444 dt_binding_schemas: <<
1445 $(Q)$(MAKE) $(build)=Documentation/de 1424 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1446 1425
1447 PHONY += dt_compatible_check 1426 PHONY += dt_compatible_check
1448 dt_compatible_check: dt_binding_schemas !! 1427 dt_compatible_check: dt_binding_check
1449 $(Q)$(MAKE) $(build)=Documentation/de 1428 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@
1450 1429
1451 # ------------------------------------------- 1430 # ---------------------------------------------------------------------------
1452 # Modules 1431 # Modules
1453 1432
1454 ifdef CONFIG_MODULES 1433 ifdef CONFIG_MODULES
1455 1434
1456 # By default, build modules as well 1435 # By default, build modules as well
1457 1436
1458 all: modules 1437 all: modules
1459 1438
1460 # When we're building modules with modversion 1439 # When we're building modules with modversions, we need to consider
1461 # the built-in objects during the descend as 1440 # the built-in objects during the descend as well, in order to
1462 # make sure the checksums are up to date befo 1441 # make sure the checksums are up to date before we record them.
1463 ifdef CONFIG_MODVERSIONS 1442 ifdef CONFIG_MODVERSIONS
1464 KBUILD_BUILTIN := 1 1443 KBUILD_BUILTIN := 1
1465 endif 1444 endif
1466 1445
1467 # Build modules 1446 # Build modules
1468 # 1447 #
1469 1448
1470 # *.ko are usually independent of vmlinux, bu 1449 # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES
1471 # is an exception. 1450 # is an exception.
1472 ifdef CONFIG_DEBUG_INFO_BTF_MODULES 1451 ifdef CONFIG_DEBUG_INFO_BTF_MODULES
1473 KBUILD_BUILTIN := 1 1452 KBUILD_BUILTIN := 1
1474 modules: vmlinux 1453 modules: vmlinux
1475 endif 1454 endif
1476 1455
1477 modules: modules_prepare 1456 modules: modules_prepare
1478 1457
1479 # Target to prepare building external modules 1458 # Target to prepare building external modules
1480 modules_prepare: prepare 1459 modules_prepare: prepare
1481 $(Q)$(MAKE) $(build)=scripts scripts/ 1460 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1482 1461
1483 endif # CONFIG_MODULES 1462 endif # CONFIG_MODULES
1484 1463
1485 ### 1464 ###
1486 # Cleaning is done on three levels. 1465 # Cleaning is done on three levels.
1487 # make clean Delete most generated files 1466 # make clean Delete most generated files
1488 # Leave enough to build extern 1467 # Leave enough to build external modules
1489 # make mrproper Delete the current configura 1468 # make mrproper Delete the current configuration, and all generated files
1490 # make distclean Remove editor backup files, 1469 # make distclean Remove editor backup files, patch leftover files and the like
1491 1470
1492 # Directories & files removed with 'make clea 1471 # Directories & files removed with 'make clean'
1493 CLEAN_FILES += vmlinux.symvers modules-only.s 1472 CLEAN_FILES += vmlinux.symvers modules-only.symvers \
1494 modules.builtin modules.builti 1473 modules.builtin modules.builtin.modinfo modules.nsdeps \
1495 modules.builtin.ranges vmlinux !! 1474 compile_commands.json .thinlto-cache rust/test \
1496 compile_commands.json rust/tes <<
1497 rust-project.json .vmlinux.obj 1475 rust-project.json .vmlinux.objs .vmlinux.export.c
1498 1476
1499 # Directories & files removed with 'make mrpr 1477 # Directories & files removed with 'make mrproper'
1500 MRPROPER_FILES += include/config include/gene 1478 MRPROPER_FILES += include/config include/generated \
1501 arch/$(SRCARCH)/include/gen 1479 arch/$(SRCARCH)/include/generated .objdiff \
1502 debian snap tar-install PKG !! 1480 debian snap tar-install \
1503 .config .config.old .versio 1481 .config .config.old .version \
1504 Module.symvers \ 1482 Module.symvers \
1505 certs/signing_key.pem \ 1483 certs/signing_key.pem \
1506 certs/x509.genkey \ 1484 certs/x509.genkey \
1507 vmlinux-gdb.py \ 1485 vmlinux-gdb.py \
1508 rpmbuild \ 1486 rpmbuild \
1509 rust/libmacros.so 1487 rust/libmacros.so
1510 1488
1511 # clean - Delete most, but leave enough to bu 1489 # clean - Delete most, but leave enough to build external modules
1512 # 1490 #
1513 clean: private rm-files := $(CLEAN_FILES) !! 1491 clean: rm-files := $(CLEAN_FILES)
1514 1492
1515 PHONY += archclean vmlinuxclean 1493 PHONY += archclean vmlinuxclean
1516 1494
1517 vmlinuxclean: 1495 vmlinuxclean:
1518 $(Q)$(CONFIG_SHELL) $(srctree)/script 1496 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1519 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1497 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1520 1498
1521 clean: archclean vmlinuxclean resolve_btfids_ 1499 clean: archclean vmlinuxclean resolve_btfids_clean
1522 1500
1523 # mrproper - Delete all generated files, incl 1501 # mrproper - Delete all generated files, including .config
1524 # 1502 #
1525 mrproper: private rm-files := $(MRPROPER_FILE !! 1503 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1526 mrproper-dirs := $(addprefix _mrproper_, 1504 mrproper-dirs := $(addprefix _mrproper_,scripts)
1527 1505
1528 PHONY += $(mrproper-dirs) mrproper 1506 PHONY += $(mrproper-dirs) mrproper
1529 $(mrproper-dirs): 1507 $(mrproper-dirs):
1530 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1508 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1531 1509
1532 mrproper: clean $(mrproper-dirs) 1510 mrproper: clean $(mrproper-dirs)
1533 $(call cmd,rmfiles) 1511 $(call cmd,rmfiles)
1534 @find . $(RCS_FIND_IGNORE) \ 1512 @find . $(RCS_FIND_IGNORE) \
1535 \( -name '*.rmeta' \) \ 1513 \( -name '*.rmeta' \) \
1536 -type f -print | xargs rm -f 1514 -type f -print | xargs rm -f
1537 1515
1538 # distclean 1516 # distclean
1539 # 1517 #
1540 PHONY += distclean 1518 PHONY += distclean
1541 1519
1542 distclean: mrproper 1520 distclean: mrproper
1543 @find . $(RCS_FIND_IGNORE) \ 1521 @find . $(RCS_FIND_IGNORE) \
1544 \( -name '*.orig' -o -name '* 1522 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1545 -o -name '*.bak' -o -name '#* 1523 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1546 -o -name 'core' -o -name tags 1524 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1547 -o -name GPATH -o -name GRTAG 1525 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
1548 -type f -print | xargs rm -f 1526 -type f -print | xargs rm -f
1549 1527
1550 1528
1551 # Packaging of the kernel to various formats 1529 # Packaging of the kernel to various formats
1552 # ------------------------------------------- 1530 # ---------------------------------------------------------------------------
1553 1531
1554 %src-pkg: FORCE 1532 %src-pkg: FORCE
1555 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1533 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1556 %pkg: include/config/kernel.release FORCE 1534 %pkg: include/config/kernel.release FORCE
1557 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1535 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1558 1536
1559 # Brief documentation of the typical targets 1537 # Brief documentation of the typical targets used
1560 # ------------------------------------------- 1538 # ---------------------------------------------------------------------------
1561 1539
1562 boards := $(wildcard $(srctree)/arch/$(SRCARC 1540 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1563 boards := $(sort $(notdir $(boards))) 1541 boards := $(sort $(notdir $(boards)))
1564 board-dirs := $(dir $(wildcard $(srctree)/arc 1542 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1565 board-dirs := $(sort $(notdir $(board-dirs:/= 1543 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1566 1544
1567 PHONY += help 1545 PHONY += help
1568 help: 1546 help:
1569 @echo 'Cleaning targets:' 1547 @echo 'Cleaning targets:'
1570 @echo ' clean - Remove mo 1548 @echo ' clean - Remove most generated files but keep the config and'
1571 @echo ' enough bu 1549 @echo ' enough build support to build external modules'
1572 @echo ' mrproper - Remove al 1550 @echo ' mrproper - Remove all generated files + config + various backup files'
1573 @echo ' distclean - mrproper 1551 @echo ' distclean - mrproper + remove editor backup and patch files'
1574 @echo '' 1552 @echo ''
1575 @$(MAKE) -f $(srctree)/scripts/kconfi 1553 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1576 @echo '' 1554 @echo ''
1577 @echo 'Other generic targets:' 1555 @echo 'Other generic targets:'
1578 @echo ' all - Build all 1556 @echo ' all - Build all targets marked with [*]'
1579 @echo '* vmlinux - Build the 1557 @echo '* vmlinux - Build the bare kernel'
1580 @echo '* modules - Build all 1558 @echo '* modules - Build all modules'
1581 @echo ' modules_install - Install a 1559 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1582 @echo ' vdso_install - Install u 1560 @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)'
1583 @echo ' dir/ - Build all 1561 @echo ' dir/ - Build all files in dir and below'
1584 @echo ' dir/file.[ois] - Build spe 1562 @echo ' dir/file.[ois] - Build specified target only'
1585 @echo ' dir/file.ll - Build the 1563 @echo ' dir/file.ll - Build the LLVM assembly file'
1586 @echo ' (requires 1564 @echo ' (requires compiler support for LLVM assembly generation)'
1587 @echo ' dir/file.lst - Build spe 1565 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1588 @echo ' (requires 1566 @echo ' (requires a recent binutils and recent build (System.map))'
1589 @echo ' dir/file.ko - Build mod 1567 @echo ' dir/file.ko - Build module including final link'
1590 @echo ' modules_prepare - Set up fo 1568 @echo ' modules_prepare - Set up for building external modules'
1591 @echo ' tags/TAGS - Generate 1569 @echo ' tags/TAGS - Generate tags file for editors'
1592 @echo ' cscope - Generate 1570 @echo ' cscope - Generate cscope index'
1593 @echo ' gtags - Generate 1571 @echo ' gtags - Generate GNU GLOBAL index'
1594 @echo ' kernelrelease - Output th 1572 @echo ' kernelrelease - Output the release version string (use with make -s)'
1595 @echo ' kernelversion - Output th 1573 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1596 @echo ' image_name - Output th 1574 @echo ' image_name - Output the image name (use with make -s)'
1597 @echo ' headers_install - Install s 1575 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1598 echo ' (default: 1576 echo ' (default: $(INSTALL_HDR_PATH))'; \
1599 echo '' 1577 echo ''
1600 @echo 'Static analysers:' 1578 @echo 'Static analysers:'
1601 @echo ' checkstack - Generate !! 1579 @echo ' checkstack - Generate a list of stack hogs'
1602 @echo ' with a st <<
1603 @echo ' versioncheck - Sanity ch 1580 @echo ' versioncheck - Sanity check on version.h usage'
1604 @echo ' includecheck - Check for 1581 @echo ' includecheck - Check for duplicate included header files'
1605 @echo ' export_report - List the 1582 @echo ' export_report - List the usages of all exported symbols'
1606 @echo ' headerdep - Detect in 1583 @echo ' headerdep - Detect inclusion cycles in headers'
1607 @echo ' coccicheck - Check wit 1584 @echo ' coccicheck - Check with Coccinelle'
1608 @echo ' clang-analyzer - Check wit 1585 @echo ' clang-analyzer - Check with clang static analyzer'
1609 @echo ' clang-tidy - Check wit 1586 @echo ' clang-tidy - Check with clang-tidy'
1610 @echo '' 1587 @echo ''
1611 @echo 'Tools:' 1588 @echo 'Tools:'
1612 @echo ' nsdeps - Generate 1589 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1613 @echo '' 1590 @echo ''
1614 @echo 'Kernel selftest:' 1591 @echo 'Kernel selftest:'
1615 @echo ' kselftest - Build a 1592 @echo ' kselftest - Build and run kernel selftest'
1616 @echo ' Build, 1593 @echo ' Build, install, and boot kernel before'
1617 @echo ' running 1594 @echo ' running kselftest on it'
1618 @echo ' Run as 1595 @echo ' Run as root for full coverage'
1619 @echo ' kselftest-all - Build k 1596 @echo ' kselftest-all - Build kernel selftest'
1620 @echo ' kselftest-install - Build a 1597 @echo ' kselftest-install - Build and install kernel selftest'
1621 @echo ' kselftest-clean - Remove 1598 @echo ' kselftest-clean - Remove all generated kselftest files'
1622 @echo ' kselftest-merge - Merge a 1599 @echo ' kselftest-merge - Merge all the config dependencies of'
1623 @echo ' kselfte 1600 @echo ' kselftest to existing .config.'
1624 @echo '' 1601 @echo ''
1625 @echo 'Rust targets:' 1602 @echo 'Rust targets:'
1626 @echo ' rustavailable - Checks wh 1603 @echo ' rustavailable - Checks whether the Rust toolchain is'
1627 @echo ' available 1604 @echo ' available and, if not, explains why.'
1628 @echo ' rustfmt - Reformat 1605 @echo ' rustfmt - Reformat all the Rust code in the kernel'
1629 @echo ' rustfmtcheck - Checks if 1606 @echo ' rustfmtcheck - Checks if all the Rust code in the kernel'
1630 @echo ' is format 1607 @echo ' is formatted, printing a diff otherwise.'
1631 @echo ' rustdoc - Generate 1608 @echo ' rustdoc - Generate Rust documentation'
1632 @echo ' (requires 1609 @echo ' (requires kernel .config)'
1633 @echo ' rusttest - Runs the 1610 @echo ' rusttest - Runs the Rust tests'
1634 @echo ' (requires 1611 @echo ' (requires kernel .config; downloads external repos)'
1635 @echo ' rust-analyzer - Generate 1612 @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file'
1636 @echo ' (requires 1613 @echo ' (requires kernel .config)'
1637 @echo ' dir/file.[os] - Build spe 1614 @echo ' dir/file.[os] - Build specified target only'
1638 @echo ' dir/file.rsi - Build mac 1615 @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.'
1639 @echo ' Run with 1616 @echo ' Run with RUSTFMT=n to skip reformatting if needed.'
1640 @echo ' The outpu 1617 @echo ' The output is not intended to be compilable.'
1641 @echo ' dir/file.ll - Build the 1618 @echo ' dir/file.ll - Build the LLVM assembly file'
1642 @echo '' 1619 @echo ''
1643 @$(if $(dtstree), \ 1620 @$(if $(dtstree), \
1644 echo 'Devicetree:'; \ 1621 echo 'Devicetree:'; \
1645 echo '* dtbs - !! 1622 echo '* dtbs - Build device tree blobs for enabled boards'; \
1646 echo ' dtbs_install - !! 1623 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1647 echo ' dt_binding_check - !! 1624 echo ' dt_binding_check - Validate device tree binding documents'; \
1648 echo ' dt_binding_schemas - !! 1625 echo ' dtbs_check - Validate device tree source files';\
1649 echo ' dtbs_check - <<
1650 echo '') 1626 echo '')
1651 1627
1652 @echo 'Userspace tools targets:' 1628 @echo 'Userspace tools targets:'
1653 @echo ' use "make tools/help"' 1629 @echo ' use "make tools/help"'
1654 @echo ' or "cd tools; make help"' 1630 @echo ' or "cd tools; make help"'
1655 @echo '' 1631 @echo ''
1656 @echo 'Kernel packaging:' 1632 @echo 'Kernel packaging:'
1657 @$(MAKE) -f $(srctree)/scripts/Makefi 1633 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1658 @echo '' 1634 @echo ''
1659 @echo 'Documentation targets:' 1635 @echo 'Documentation targets:'
1660 @$(MAKE) -f $(srctree)/Documentation/ 1636 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1661 @echo '' 1637 @echo ''
1662 @echo 'Architecture-specific targets 1638 @echo 'Architecture-specific targets ($(SRCARCH)):'
1663 @$(or $(archhelp),\ 1639 @$(or $(archhelp),\
1664 echo ' No architecture-speci 1640 echo ' No architecture-specific help defined for $(SRCARCH)')
1665 @echo '' 1641 @echo ''
1666 @$(if $(boards), \ 1642 @$(if $(boards), \
1667 $(foreach b, $(boards), \ 1643 $(foreach b, $(boards), \
1668 printf " %-27s - Build for % 1644 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1669 echo '') 1645 echo '')
1670 @$(if $(board-dirs), \ 1646 @$(if $(board-dirs), \
1671 $(foreach b, $(board-dirs), \ 1647 $(foreach b, $(board-dirs), \
1672 printf " %-16s - Show %s-spe 1648 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1673 printf " %-16s - Show all of 1649 printf " %-16s - Show all of the above\\n" help-boards; \
1674 echo '') 1650 echo '')
1675 1651
1676 @echo ' make V=n [targets] 1: ver 1652 @echo ' make V=n [targets] 1: verbose build'
1677 @echo ' 2: giv 1653 @echo ' 2: give reason for rebuild of target'
1678 @echo ' V=1 an 1654 @echo ' V=1 and V=2 can be combined with V=12'
1679 @echo ' make O=dir [targets] Locate 1655 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1680 @echo ' make C=1 [targets] Check 1656 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1681 @echo ' (spars 1657 @echo ' (sparse by default)'
1682 @echo ' make C=2 [targets] Force 1658 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1683 @echo ' make RECORDMCOUNT_WARN=1 [t 1659 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1684 @echo ' make W=n [targets] Enable !! 1660 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1685 @echo ' 1: warnings w 1661 @echo ' 1: warnings which may be relevant and do not occur too often'
1686 @echo ' 2: warnings w 1662 @echo ' 2: warnings which occur quite often but may still be relevant'
1687 @echo ' 3: more obscu 1663 @echo ' 3: more obscure warnings, can most likely be ignored'
1688 @echo ' c: extra chec <<
1689 @echo ' e: warnings a 1664 @echo ' e: warnings are being treated as errors'
1690 @echo ' Multiple leve 1665 @echo ' Multiple levels can be combined with W=12 or W=123'
1691 @$(if $(dtstree), \ 1666 @$(if $(dtstree), \
1692 echo ' make CHECK_DTBS=1 [ta 1667 echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \
1693 echo ' This can be ap 1668 echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \
1694 ) 1669 )
1695 @echo '' 1670 @echo ''
1696 @echo 'Execute "make" or "make all" 1671 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1697 @echo 'For further info see the ./RE 1672 @echo 'For further info see the ./README file'
1698 1673
1699 1674
1700 help-board-dirs := $(addprefix help-,$(board- 1675 help-board-dirs := $(addprefix help-,$(board-dirs))
1701 1676
1702 help-boards: $(help-board-dirs) 1677 help-boards: $(help-board-dirs)
1703 1678
1704 boards-per-dir = $(sort $(notdir $(wildcard $ 1679 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1705 1680
1706 $(help-board-dirs): help-%: 1681 $(help-board-dirs): help-%:
1707 @echo 'Architecture-specific targets 1682 @echo 'Architecture-specific targets ($(SRCARCH) $*):'
1708 @$(if $(boards-per-dir), \ 1683 @$(if $(boards-per-dir), \
1709 $(foreach b, $(boards-per-dir 1684 $(foreach b, $(boards-per-dir), \
1710 printf " %-24s - Build for % 1685 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1711 echo '') 1686 echo '')
1712 1687
1713 1688
1714 # Documentation targets 1689 # Documentation targets
1715 # ------------------------------------------- 1690 # ---------------------------------------------------------------------------
1716 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1691 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1717 linkcheckdocs dochelp refcheck 1692 linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
1718 PHONY += $(DOC_TARGETS) 1693 PHONY += $(DOC_TARGETS)
1719 $(DOC_TARGETS): 1694 $(DOC_TARGETS):
1720 $(Q)$(MAKE) $(build)=Documentation $@ 1695 $(Q)$(MAKE) $(build)=Documentation $@
1721 1696
1722 1697
1723 # Rust targets 1698 # Rust targets
1724 # ------------------------------------------- 1699 # ---------------------------------------------------------------------------
1725 1700
1726 # "Is Rust available?" target 1701 # "Is Rust available?" target
1727 PHONY += rustavailable 1702 PHONY += rustavailable
1728 rustavailable: 1703 rustavailable:
1729 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip !! 1704 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!"
1730 1705
1731 # Documentation target 1706 # Documentation target
1732 # 1707 #
1733 # Using the singular to avoid running afoul o 1708 # Using the singular to avoid running afoul of `no-dot-config-targets`.
1734 PHONY += rustdoc 1709 PHONY += rustdoc
1735 rustdoc: prepare 1710 rustdoc: prepare
1736 $(Q)$(MAKE) $(build)=rust $@ 1711 $(Q)$(MAKE) $(build)=rust $@
1737 1712
1738 # Testing target 1713 # Testing target
1739 PHONY += rusttest 1714 PHONY += rusttest
1740 rusttest: prepare 1715 rusttest: prepare
1741 $(Q)$(MAKE) $(build)=rust $@ 1716 $(Q)$(MAKE) $(build)=rust $@
1742 1717
1743 # Formatting targets 1718 # Formatting targets
1744 PHONY += rustfmt rustfmtcheck 1719 PHONY += rustfmt rustfmtcheck
1745 1720
1746 # We skip `rust/alloc` since we want to minim 1721 # We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
1747 # 1722 #
1748 # We match using absolute paths since `find` 1723 # We match using absolute paths since `find` does not resolve them
1749 # when matching, which is a problem when e.g. 1724 # when matching, which is a problem when e.g. `srctree` is `..`.
1750 # We `grep` afterwards in order to remove the 1725 # We `grep` afterwards in order to remove the directory entry itself.
1751 rustfmt: 1726 rustfmt:
1752 $(Q)find $(abs_srctree) -type f -name 1727 $(Q)find $(abs_srctree) -type f -name '*.rs' \
1753 -o -path $(abs_srctree)/rust/ 1728 -o -path $(abs_srctree)/rust/alloc -prune \
1754 -o -path $(abs_objtree)/rust/ 1729 -o -path $(abs_objtree)/rust/test -prune \
1755 | grep -Fv $(abs_srctree)/rus 1730 | grep -Fv $(abs_srctree)/rust/alloc \
1756 | grep -Fv $(abs_objtree)/rus 1731 | grep -Fv $(abs_objtree)/rust/test \
1757 | grep -Fv generated \ 1732 | grep -Fv generated \
1758 | xargs $(RUSTFMT) $(rustfmt_ 1733 | xargs $(RUSTFMT) $(rustfmt_flags)
1759 1734
1760 rustfmtcheck: rustfmt_flags = --check 1735 rustfmtcheck: rustfmt_flags = --check
1761 rustfmtcheck: rustfmt 1736 rustfmtcheck: rustfmt
1762 1737
1763 # Misc 1738 # Misc
1764 # ------------------------------------------- 1739 # ---------------------------------------------------------------------------
1765 1740
1766 PHONY += misc-check 1741 PHONY += misc-check
1767 misc-check: 1742 misc-check:
1768 $(Q)$(srctree)/scripts/misc-check 1743 $(Q)$(srctree)/scripts/misc-check
1769 1744
1770 all: misc-check 1745 all: misc-check
1771 1746
1772 PHONY += scripts_gdb 1747 PHONY += scripts_gdb
1773 scripts_gdb: prepare0 1748 scripts_gdb: prepare0
1774 $(Q)$(MAKE) $(build)=scripts/gdb 1749 $(Q)$(MAKE) $(build)=scripts/gdb
1775 $(Q)ln -fsn $(abspath $(srctree)/scri 1750 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1776 1751
1777 ifdef CONFIG_GDB_SCRIPTS 1752 ifdef CONFIG_GDB_SCRIPTS
1778 all: scripts_gdb 1753 all: scripts_gdb
1779 endif 1754 endif
1780 1755
1781 else # KBUILD_EXTMOD 1756 else # KBUILD_EXTMOD
1782 1757
1783 filechk_kernel.release = echo $(KERNELRELEASE 1758 filechk_kernel.release = echo $(KERNELRELEASE)
1784 1759
1785 ### 1760 ###
1786 # External module support. 1761 # External module support.
1787 # When building external modules the kernel u 1762 # When building external modules the kernel used as basis is considered
1788 # read-only, and no consistency checks are ma 1763 # read-only, and no consistency checks are made and the make
1789 # system is not used on the basis kernel. If 1764 # system is not used on the basis kernel. If updates are required
1790 # in the basis kernel ordinary make commands 1765 # in the basis kernel ordinary make commands (without M=...) must be used.
1791 1766
1792 # We are always building only modules. 1767 # We are always building only modules.
1793 KBUILD_BUILTIN := 1768 KBUILD_BUILTIN :=
1794 KBUILD_MODULES := 1 1769 KBUILD_MODULES := 1
1795 1770
1796 build-dir := $(KBUILD_EXTMOD) 1771 build-dir := $(KBUILD_EXTMOD)
1797 1772
1798 compile_commands.json: $(extmod_prefix)compil 1773 compile_commands.json: $(extmod_prefix)compile_commands.json
1799 PHONY += compile_commands.json 1774 PHONY += compile_commands.json
1800 1775
1801 clean-dirs := $(KBUILD_EXTMOD) 1776 clean-dirs := $(KBUILD_EXTMOD)
1802 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1777 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1803 $(KBUILD_EXTMOD)/compile_commands.jso !! 1778 $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
1804 1779
1805 PHONY += prepare 1780 PHONY += prepare
1806 # now expand this into a simple variable to r 1781 # now expand this into a simple variable to reduce the cost of shell evaluations
1807 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT 1782 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
1808 prepare: 1783 prepare:
1809 @if [ "$(CC_VERSION_TEXT)" != "$(CONF 1784 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
1810 echo >&2 "warning: the compil 1785 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1811 echo >&2 " The kernel was bu 1786 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
1812 echo >&2 " You are using: 1787 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
1813 fi 1788 fi
1814 1789
1815 PHONY += help 1790 PHONY += help
1816 help: 1791 help:
1817 @echo ' Building external modules.' 1792 @echo ' Building external modules.'
1818 @echo ' Syntax: make -C path/to/ker 1793 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1819 @echo '' 1794 @echo ''
1820 @echo ' modules - default t 1795 @echo ' modules - default target, build the module(s)'
1821 @echo ' modules_install - install t 1796 @echo ' modules_install - install the module'
1822 @echo ' clean - remove ge 1797 @echo ' clean - remove generated files in module directory only'
1823 @echo ' rust-analyzer - generate 1798 @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file'
1824 @echo '' 1799 @echo ''
1825 1800
1826 ifndef CONFIG_MODULES 1801 ifndef CONFIG_MODULES
1827 modules modules_install: __external_modules_e 1802 modules modules_install: __external_modules_error
1828 __external_modules_error: 1803 __external_modules_error:
1829 @echo >&2 '***' 1804 @echo >&2 '***'
1830 @echo >&2 '*** The present kernel dis 1805 @echo >&2 '*** The present kernel disabled CONFIG_MODULES.'
1831 @echo >&2 '*** You cannot build or in 1806 @echo >&2 '*** You cannot build or install external modules.'
1832 @echo >&2 '***' 1807 @echo >&2 '***'
1833 @false 1808 @false
1834 endif 1809 endif
1835 1810
1836 endif # KBUILD_EXTMOD 1811 endif # KBUILD_EXTMOD
1837 1812
1838 # ------------------------------------------- 1813 # ---------------------------------------------------------------------------
1839 # Modules 1814 # Modules
1840 1815
1841 PHONY += modules modules_install modules_sign 1816 PHONY += modules modules_install modules_sign modules_prepare
1842 1817
1843 modules_install: 1818 modules_install:
1844 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1819 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \
1845 sign-only=$(if $(filter modules_insta 1820 sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y)
1846 1821
1847 ifeq ($(CONFIG_MODULE_SIG),y) 1822 ifeq ($(CONFIG_MODULE_SIG),y)
1848 # modules_sign is a subset of modules_install 1823 # modules_sign is a subset of modules_install.
1849 # 'make modules_install modules_sign' is equi 1824 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1850 modules_sign: modules_install 1825 modules_sign: modules_install
1851 @: 1826 @:
1852 else 1827 else
1853 modules_sign: 1828 modules_sign:
1854 @echo >&2 '***' 1829 @echo >&2 '***'
1855 @echo >&2 '*** CONFIG_MODULE_SIG is d 1830 @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.'
1856 @echo >&2 '***' 1831 @echo >&2 '***'
1857 @false 1832 @false
1858 endif 1833 endif
1859 1834
1860 ifdef CONFIG_MODULES 1835 ifdef CONFIG_MODULES
1861 1836
1862 $(MODORDER): $(build-dir) 1837 $(MODORDER): $(build-dir)
1863 @: 1838 @:
1864 1839
1865 # KBUILD_MODPOST_NOFINAL can be set to skip t 1840 # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
1866 # This is solely useful to speed up test comp 1841 # This is solely useful to speed up test compiles.
1867 modules: modpost 1842 modules: modpost
1868 ifneq ($(KBUILD_MODPOST_NOFINAL),1) 1843 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
1869 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1844 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1870 endif 1845 endif
1871 1846
1872 PHONY += modules_check 1847 PHONY += modules_check
1873 modules_check: $(MODORDER) 1848 modules_check: $(MODORDER)
1874 $(Q)$(CONFIG_SHELL) $(srctree)/script 1849 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1875 1850
1876 else # CONFIG_MODULES 1851 else # CONFIG_MODULES
1877 1852
1878 modules: 1853 modules:
1879 @: 1854 @:
1880 1855
1881 KBUILD_MODULES := 1856 KBUILD_MODULES :=
1882 1857
1883 endif # CONFIG_MODULES 1858 endif # CONFIG_MODULES
1884 1859
1885 PHONY += modpost 1860 PHONY += modpost
1886 modpost: $(if $(single-build),, $(if $(KBUILD 1861 modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \
1887 $(if $(KBUILD_MODULES), modules_chec 1862 $(if $(KBUILD_MODULES), modules_check)
1888 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1863 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1889 1864
1890 # Single targets 1865 # Single targets
1891 # ------------------------------------------- 1866 # ---------------------------------------------------------------------------
1892 # To build individual files in subdirectories 1867 # To build individual files in subdirectories, you can do like this:
1893 # 1868 #
1894 # make foo/bar/baz.s 1869 # make foo/bar/baz.s
1895 # 1870 #
1896 # The supported suffixes for single-target ar 1871 # The supported suffixes for single-target are listed in 'single-targets'
1897 # 1872 #
1898 # To build only under specific subdirectories 1873 # To build only under specific subdirectories, you can do like this:
1899 # 1874 #
1900 # make foo/bar/baz/ 1875 # make foo/bar/baz/
1901 1876
1902 ifdef single-build 1877 ifdef single-build
1903 1878
1904 # .ko is special because modpost is needed 1879 # .ko is special because modpost is needed
1905 single-ko := $(sort $(filter %.ko, $(MAKECMDG 1880 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1906 single-no-ko := $(filter-out $(single-ko), $( 1881 single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
1907 $(foreach x, o mod, $(patsubs 1882 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
1908 1883
1909 $(single-ko): single_modules 1884 $(single-ko): single_modules
1910 @: 1885 @:
1911 $(single-no-ko): $(build-dir) 1886 $(single-no-ko): $(build-dir)
1912 @: 1887 @:
1913 1888
1914 # Remove MODORDER when done because it is not 1889 # Remove MODORDER when done because it is not the real one.
1915 PHONY += single_modules 1890 PHONY += single_modules
1916 single_modules: $(single-no-ko) modules_prepa 1891 single_modules: $(single-no-ko) modules_prepare
1917 $(Q){ $(foreach m, $(single-ko), echo 1892 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER)
1918 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1893 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1919 ifneq ($(KBUILD_MODPOST_NOFINAL),1) 1894 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
1920 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1895 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
1921 endif 1896 endif
1922 $(Q)rm -f $(MODORDER) 1897 $(Q)rm -f $(MODORDER)
1923 1898
1924 single-goals := $(addprefix $(build-dir)/, $( 1899 single-goals := $(addprefix $(build-dir)/, $(single-no-ko))
1925 1900
1926 KBUILD_MODULES := 1 1901 KBUILD_MODULES := 1
1927 1902
1928 endif 1903 endif
1929 1904
1930 # Preset locale variables to speed up the bui 1905 # Preset locale variables to speed up the build process. Limit locale
1931 # tweaks to this spot to avoid wrong language 1906 # tweaks to this spot to avoid wrong language settings when running
1932 # make menuconfig etc. 1907 # make menuconfig etc.
1933 # Error messages still appears in the origina 1908 # Error messages still appears in the original language
1934 PHONY += $(build-dir) 1909 PHONY += $(build-dir)
1935 $(build-dir): prepare 1910 $(build-dir): prepare
1936 $(Q)$(MAKE) $(build)=$@ need-builtin= 1911 $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals)
1937 1912
1938 clean-dirs := $(addprefix _clean_, $(clean-di 1913 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1939 PHONY += $(clean-dirs) clean 1914 PHONY += $(clean-dirs) clean
1940 $(clean-dirs): 1915 $(clean-dirs):
1941 $(Q)$(MAKE) $(clean)=$(patsubst _clea 1916 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1942 1917
1943 clean: $(clean-dirs) 1918 clean: $(clean-dirs)
1944 $(call cmd,rmfiles) 1919 $(call cmd,rmfiles)
1945 @find $(or $(KBUILD_EXTMOD), .) $(RCS 1920 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1946 \( -name '*.[aios]' -o -name 1921 \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
1947 -o -name '*.ko.*' \ 1922 -o -name '*.ko.*' \
1948 -o -name '*.dtb' -o -name '*. 1923 -o -name '*.dtb' -o -name '*.dtbo' \
1949 -o -name '*.dtb.S' -o -name ' 1924 -o -name '*.dtb.S' -o -name '*.dtbo.S' \
1950 -o -name '*.dt.yaml' -o -name !! 1925 -o -name '*.dt.yaml' \
1951 -o -name '*.dwo' -o -name '*. 1926 -o -name '*.dwo' -o -name '*.lst' \
1952 -o -name '*.su' -o -name '*.m 1927 -o -name '*.su' -o -name '*.mod' \
1953 -o -name '.*.d' -o -name '.*. 1928 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1954 -o -name '*.lex.c' -o -name ' 1929 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1955 -o -name '*.asn1.[ch]' \ 1930 -o -name '*.asn1.[ch]' \
1956 -o -name '*.symtypes' -o -nam 1931 -o -name '*.symtypes' -o -name 'modules.order' \
1957 -o -name '*.c.[012]*.*' \ 1932 -o -name '*.c.[012]*.*' \
1958 -o -name '*.ll' \ 1933 -o -name '*.ll' \
1959 -o -name '*.gcno' \ 1934 -o -name '*.gcno' \
1960 \) -type f -print \ !! 1935 -o -name '*.*.symversions' \) -type f -print \
1961 -o -name '.tmp_*' -print \ 1936 -o -name '.tmp_*' -print \
1962 | xargs rm -rf 1937 | xargs rm -rf
1963 1938
1964 # Generate tags for editors 1939 # Generate tags for editors
1965 # ------------------------------------------- 1940 # ---------------------------------------------------------------------------
1966 quiet_cmd_tags = GEN $@ 1941 quiet_cmd_tags = GEN $@
1967 cmd_tags = $(BASH) $(srctree)/scripts/t 1942 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1968 1943
1969 tags TAGS cscope gtags: FORCE 1944 tags TAGS cscope gtags: FORCE
1970 $(call cmd,tags) 1945 $(call cmd,tags)
1971 1946
1972 # Generate rust-project.json (a file that des !! 1947 # IDE support targets
1973 # Rust projects) for rust-analyzer (an implem <<
1974 # Protocol). <<
1975 PHONY += rust-analyzer 1948 PHONY += rust-analyzer
1976 rust-analyzer: 1949 rust-analyzer:
1977 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1978 $(Q)$(MAKE) $(build)=rust $@ 1950 $(Q)$(MAKE) $(build)=rust $@
1979 1951
1980 # Script to generate missing namespace depend 1952 # Script to generate missing namespace dependencies
1981 # ------------------------------------------- 1953 # ---------------------------------------------------------------------------
1982 1954
1983 PHONY += nsdeps 1955 PHONY += nsdeps
1984 nsdeps: export KBUILD_NSDEPS=1 1956 nsdeps: export KBUILD_NSDEPS=1
1985 nsdeps: modules 1957 nsdeps: modules
1986 $(Q)$(CONFIG_SHELL) $(srctree)/script 1958 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1987 1959
1988 # Clang Tooling 1960 # Clang Tooling
1989 # ------------------------------------------- 1961 # ---------------------------------------------------------------------------
1990 1962
1991 quiet_cmd_gen_compile_commands = GEN $@ 1963 quiet_cmd_gen_compile_commands = GEN $@
1992 cmd_gen_compile_commands = $(PYTHON3) $ 1964 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1993 1965
1994 $(extmod_prefix)compile_commands.json: $(srct !! 1966 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1995 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K 1967 $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \
1996 $(if $(CONFIG_MODULES), $(MODORDER)) 1968 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1997 $(call if_changed,gen_compile_command 1969 $(call if_changed,gen_compile_commands)
1998 1970
1999 targets += $(extmod_prefix)compile_commands.j 1971 targets += $(extmod_prefix)compile_commands.json
2000 1972
2001 PHONY += clang-tidy clang-analyzer 1973 PHONY += clang-tidy clang-analyzer
2002 1974
2003 ifdef CONFIG_CC_IS_CLANG 1975 ifdef CONFIG_CC_IS_CLANG
2004 quiet_cmd_clang_tools = CHECK $< 1976 quiet_cmd_clang_tools = CHECK $<
2005 cmd_clang_tools = $(PYTHON3) $(srctree) 1977 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
2006 1978
2007 clang-tidy clang-analyzer: $(extmod_prefix)co 1979 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
2008 $(call cmd,clang_tools) 1980 $(call cmd,clang_tools)
2009 else 1981 else
2010 clang-tidy clang-analyzer: 1982 clang-tidy clang-analyzer:
2011 @echo "$@ requires CC=clang" >&2 1983 @echo "$@ requires CC=clang" >&2
2012 @false 1984 @false
2013 endif 1985 endif
2014 1986
2015 # Scripts to check various things for consist 1987 # Scripts to check various things for consistency
2016 # ------------------------------------------- 1988 # ---------------------------------------------------------------------------
2017 1989
2018 PHONY += includecheck versioncheck coccicheck 1990 PHONY += includecheck versioncheck coccicheck export_report
2019 1991
2020 includecheck: 1992 includecheck:
2021 find $(srctree)/* $(RCS_FIND_IGNORE) 1993 find $(srctree)/* $(RCS_FIND_IGNORE) \
2022 -name '*.[hcS]' -type f -prin 1994 -name '*.[hcS]' -type f -print | sort \
2023 | xargs $(PERL) -w $(srctree) 1995 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2024 1996
2025 versioncheck: 1997 versioncheck:
2026 find $(srctree)/* $(RCS_FIND_IGNORE) 1998 find $(srctree)/* $(RCS_FIND_IGNORE) \
2027 -name '*.[hcS]' -type f -prin 1999 -name '*.[hcS]' -type f -print | sort \
2028 | xargs $(PERL) -w $(srctree) 2000 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2029 2001
2030 coccicheck: 2002 coccicheck:
2031 $(Q)$(BASH) $(srctree)/scripts/$@ 2003 $(Q)$(BASH) $(srctree)/scripts/$@
2032 2004
2033 export_report: 2005 export_report:
2034 $(PERL) $(srctree)/scripts/export_rep 2006 $(PERL) $(srctree)/scripts/export_report.pl
2035 2007
2036 PHONY += checkstack kernelrelease kernelversi 2008 PHONY += checkstack kernelrelease kernelversion image_name
2037 2009
2038 # UML needs a little special treatment here. 2010 # UML needs a little special treatment here. It wants to use the host
2039 # toolchain, so needs $(SUBARCH) passed to ch 2011 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2040 # else wants $(ARCH), including people doing 2012 # else wants $(ARCH), including people doing cross-builds, which means
2041 # that $(SUBARCH) doesn't work here. 2013 # that $(SUBARCH) doesn't work here.
2042 ifeq ($(ARCH), um) 2014 ifeq ($(ARCH), um)
2043 CHECKSTACK_ARCH := $(SUBARCH) 2015 CHECKSTACK_ARCH := $(SUBARCH)
2044 else 2016 else
2045 CHECKSTACK_ARCH := $(ARCH) 2017 CHECKSTACK_ARCH := $(ARCH)
2046 endif 2018 endif
2047 MINSTACKSIZE ?= 100 <<
2048 checkstack: 2019 checkstack:
2049 $(OBJDUMP) -d vmlinux $$(find . -name 2020 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2050 $(PERL) $(srctree)/scripts/checkstack !! 2021 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2051 2022
2052 kernelrelease: 2023 kernelrelease:
2053 @$(filechk_kernel.release) 2024 @$(filechk_kernel.release)
2054 2025
2055 kernelversion: 2026 kernelversion:
2056 @echo $(KERNELVERSION) 2027 @echo $(KERNELVERSION)
2057 2028
2058 image_name: 2029 image_name:
2059 @echo $(KBUILD_IMAGE) 2030 @echo $(KBUILD_IMAGE)
2060 2031
2061 PHONY += run-command 2032 PHONY += run-command
2062 run-command: 2033 run-command:
2063 $(Q)$(KBUILD_RUN_COMMAND) 2034 $(Q)$(KBUILD_RUN_COMMAND)
2064 2035
2065 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 2036 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2066 cmd_rmfiles = rm -rf $(rm-files) 2037 cmd_rmfiles = rm -rf $(rm-files)
2067 2038
2068 # read saved command lines for existing targe 2039 # read saved command lines for existing targets
2069 existing-targets := $(wildcard $(sort $(targe 2040 existing-targets := $(wildcard $(sort $(targets)))
2070 2041
2071 -include $(foreach f,$(existing-targets),$(di 2042 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2072 2043
2073 endif # config-build 2044 endif # config-build
2074 endif # mixed-build 2045 endif # mixed-build
2075 endif # need-sub-make 2046 endif # need-sub-make
2076 2047
2077 PHONY += FORCE 2048 PHONY += FORCE
2078 FORCE: 2049 FORCE:
2079 2050
2080 # Declare the contents of the PHONY variable 2051 # Declare the contents of the PHONY variable as phony. We keep that
2081 # information in a variable so we can use it 2052 # information in a variable so we can use it in if_changed and friends.
2082 .PHONY: $(PHONY) 2053 .PHONY: $(PHONY)
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