1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 2 VERSION = 6
3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 0
4 SUBLEVEL = 5 !! 4 SUBLEVEL = 19
5 EXTRAVERSION = 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Hurr durr I'ma ninja sloth
7 7
8 # *DOCUMENTATION* 8 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 10 # More info can be located in ./README
11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file.
13 13
14 ifeq ($(filter output-sync,$(.FEATURES)),) <<
15 $(error GNU Make >= 4.0 is required. Your Make <<
16 endif <<
17 <<
18 $(if $(filter __%, $(MAKECMDGOALS)), \ 14 $(if $(filter __%, $(MAKECMDGOALS)), \
19 $(error targets prefixed with '__' are 15 $(error targets prefixed with '__' are only for internal use))
20 16
21 # That's our default target when none is given 17 # That's our default target when none is given on the command line
22 PHONY := __all 18 PHONY := __all
23 __all: 19 __all:
24 20
25 # We are using a recursive build, so we need t 21 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 22 # to get the ordering right.
27 # 23 #
28 # Most importantly: sub-Makefiles should only 24 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 25 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 26 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 27 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 28 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 29 # after that we are sure that everything which is in that other dir
34 # is now up to date. 30 # is now up to date.
35 # 31 #
36 # The only cases where we need to modify files 32 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 33 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 34 # descending is started. They are now explicitly listed as the
39 # prepare rule. 35 # prepare rule.
40 36
41 this-makefile := $(lastword $(MAKEFILE_LIST)) <<
42 abs_srctree := $(realpath $(dir $(this-makefil <<
43 abs_objtree := $(CURDIR) <<
44 <<
45 ifneq ($(sub_make_done),1) 37 ifneq ($(sub_make_done),1)
46 38
47 # Do not use make's built-in rules and variabl 39 # Do not use make's built-in rules and variables
48 # (this increases performance and avoids hard- 40 # (this increases performance and avoids hard-to-debug behaviour)
49 MAKEFLAGS += -rR 41 MAKEFLAGS += -rR
50 42
51 # Avoid funny character set dependencies 43 # Avoid funny character set dependencies
52 unexport LC_ALL 44 unexport LC_ALL
53 LC_COLLATE=C 45 LC_COLLATE=C
54 LC_NUMERIC=C 46 LC_NUMERIC=C
55 export LC_COLLATE LC_NUMERIC 47 export LC_COLLATE LC_NUMERIC
56 48
57 # Avoid interference with shell env settings 49 # Avoid interference with shell env settings
58 unexport GREP_OPTIONS 50 unexport GREP_OPTIONS
59 51
60 # Beautify output 52 # Beautify output
61 # -------------------------------------------- 53 # ---------------------------------------------------------------------------
62 # 54 #
63 # Most of build commands in Kbuild start with !! 55 # Normally, we echo the whole command before executing it. By making
64 # "quiet_cmd_*". If defined, the short log is !! 56 # that echo $($(quiet)$(cmd)), we now have the possibility to set
65 # that command is printed by default. !! 57 # $(quiet) to choose other forms of output instead, e.g.
66 # !! 58 #
67 # e.g.) !! 59 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 60 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
69 # cmd_depmod = $(srctree)/scripts/dep !! 61 #
>> 62 # If $(quiet) is empty, the whole command will be printed.
>> 63 # If it is set to "quiet_", only the short version will be printed.
>> 64 # If it is set to "silent_", nothing will be printed at all, since
>> 65 # the variable $(silent_cmd_cc_o_c) doesn't exist.
70 # 66 #
71 # A simple variant is to prefix commands with 67 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 68 # for commands that shall be hidden in non-verbose mode.
73 # 69 #
74 # $(Q)$(MAKE) $(build)=scripts/basic !! 70 # $(Q)ln $@ :<
75 # 71 #
76 # If KBUILD_VERBOSE contains 1, the whole comm !! 72 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
77 # If KBUILD_VERBOSE contains 2, the reason for !! 73 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
>> 74 # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
78 # 75 #
79 # To put more focus on warnings, be less verbo 76 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 77 # Use 'make V=1' to see the full commands
81 78
82 ifeq ("$(origin V)", "command line") 79 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 80 KBUILD_VERBOSE = $(V)
84 endif 81 endif
>> 82 ifndef KBUILD_VERBOSE
>> 83 KBUILD_VERBOSE = 0
>> 84 endif
85 85
86 quiet = quiet_ !! 86 ifeq ($(KBUILD_VERBOSE),1)
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = 87 quiet =
91 Q = 88 Q =
>> 89 else
>> 90 quiet=quiet_
>> 91 Q = @
92 endif 92 endif
93 93
94 # If the user is running make -s (silent mode) 94 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 95 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 96
97 quiet=silent_ !! 97 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
98 override KBUILD_VERBOSE := !! 98 quiet=silent_
>> 99 KBUILD_VERBOSE = 0
99 endif 100 endif
100 101
101 export quiet Q KBUILD_VERBOSE 102 export quiet Q KBUILD_VERBOSE
102 103
103 # Call a source code checker (by default, "spa 104 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation. 105 # C compilation.
105 # 106 #
106 # Use 'make C=1' to enable checking of only re 107 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s 108 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not. 109 # of whether they are re-compiled or not.
109 # 110 #
110 # See the file "Documentation/dev-tools/sparse 111 # See the file "Documentation/dev-tools/sparse.rst" for more details,
111 # including where to get the "sparse" utility. 112 # including where to get the "sparse" utility.
112 113
113 ifeq ("$(origin C)", "command line") 114 ifeq ("$(origin C)", "command line")
114 KBUILD_CHECKSRC = $(C) 115 KBUILD_CHECKSRC = $(C)
115 endif 116 endif
116 ifndef KBUILD_CHECKSRC 117 ifndef KBUILD_CHECKSRC
117 KBUILD_CHECKSRC = 0 118 KBUILD_CHECKSRC = 0
118 endif 119 endif
119 120
120 export KBUILD_CHECKSRC 121 export KBUILD_CHECKSRC
121 122
122 # Enable "clippy" (a linter) as part of the Ru <<
123 # <<
124 # Use 'make CLIPPY=1' to enable it. <<
125 ifeq ("$(origin CLIPPY)", "command line") <<
126 KBUILD_CLIPPY := $(CLIPPY) <<
127 endif <<
128 <<
129 export KBUILD_CLIPPY <<
130 <<
131 # Use make M=dir or set the environment variab 123 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
132 # directory of external module to build. Setti 124 # directory of external module to build. Setting M= takes precedence.
133 ifeq ("$(origin M)", "command line") 125 ifeq ("$(origin M)", "command line")
134 KBUILD_EXTMOD := $(M) 126 KBUILD_EXTMOD := $(M)
135 endif 127 endif
136 128
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ 129 $(if $(word 2, $(KBUILD_EXTMOD)), \
138 $(error building multiple external mod 130 $(error building multiple external modules is not supported))
139 131
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI 132 $(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
141 $(error module directory path cannot c 133 $(error module directory path cannot contain '$x')))
142 134
143 # Remove trailing slashes 135 # Remove trailing slashes
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 136 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM 137 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
146 endif 138 endif
147 139
148 export KBUILD_EXTMOD 140 export KBUILD_EXTMOD
149 141
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif <<
156 <<
157 export KBUILD_EXTRA_WARN <<
158 <<
159 # Kbuild will save output files in the current 142 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t 143 # This does not need to match to the root of the kernel source tree.
161 # 144 #
162 # For example, you can do this: 145 # For example, you can do this:
163 # 146 #
164 # cd /dir/to/store/output/files; make -f /dir 147 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 # 148 #
166 # If you want to save output files in a differ 149 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it. 150 # two syntaxes to specify it.
168 # 151 #
169 # 1) O= 152 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 153 # Use "make O=dir/to/store/output/files/"
171 # 154 #
172 # 2) Set KBUILD_OUTPUT 155 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t 156 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil 157 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 # 158 #
176 # The O= assignment takes precedence over the 159 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 160 # variable.
178 161
179 # Do we want to change the working directory? 162 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line") 163 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 164 KBUILD_OUTPUT := $(O)
182 endif 165 endif
183 166
184 ifneq ($(KBUILD_OUTPUT),) 167 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does !! 168 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 169 # expand a shell special character '~'. We use a somewhat tedious way here.
>> 170 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
>> 171 $(if $(abs_objtree),, \
>> 172 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
>> 173
187 # $(realpath ...) resolves symlinks 174 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 175 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create !! 176 else
>> 177 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),) 178 endif # ifneq ($(KBUILD_OUTPUT),)
191 179
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 180 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 181 # Suppress "Entering directory ..." unless we are changing the work directory.
>> 182 MAKEFLAGS += --no-print-directory
>> 183 else
>> 184 need-sub-make := 1
194 endif 185 endif
195 186
196 export sub_make_done := 1 !! 187 this-makefile := $(lastword $(MAKEFILE_LIST))
>> 188 abs_srctree := $(realpath $(dir $(this-makefile)))
197 189
198 endif # sub_make_done !! 190 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
>> 191 $(error source directory cannot contain spaces or colons)
>> 192 endif
199 193
200 ifeq ($(abs_objtree),$(CURDIR)) !! 194 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are !! 195 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory !! 196 #
203 else !! 197 # --included-dir is added for backward compatibility, but you should not rely on
204 # Recursion to show "Entering directory ..." !! 198 # it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
205 need-sub-make := 1 !! 199 MAKEFLAGS += --include-dir=$(abs_srctree)
206 endif 200 endif
207 201
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 202 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 203 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 204 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
211 # behavior change in GNU Make 4.4.1. <<
212 need-sub-make := 1 205 need-sub-make := 1
>> 206 # Cancel implicit rules for this Makefile.
>> 207 $(this-makefile): ;
213 endif 208 endif
214 209
>> 210 export abs_srctree abs_objtree
>> 211 export sub_make_done := 1
>> 212
215 ifeq ($(need-sub-make),1) 213 ifeq ($(need-sub-make),1)
216 214
217 PHONY += $(MAKECMDGOALS) __sub-make 215 PHONY += $(MAKECMDGOALS) __sub-make
218 216
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) 217 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220 @: 218 @:
221 219
222 # Invoke a second make in the output directory 220 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: 221 __sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 222 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225 -f $(abs_srctree)/Makefile $(MAKECMDGO <<
226 223
227 else # need-sub-make !! 224 endif # need-sub-make
>> 225 endif # sub_make_done
228 226
229 # We process the rest of the Makefile if this 227 # We process the rest of the Makefile if this is the final invocation of make
>> 228 ifeq ($(need-sub-make),)
>> 229
>> 230 # Do not print "Entering directory ...",
>> 231 # but we want to display it when entering to the output directory
>> 232 # so that IDEs/editors are able to understand relative filenames.
>> 233 MAKEFLAGS += --no-print-directory
230 234
231 ifeq ($(abs_srctree),$(abs_objtree)) 235 ifeq ($(abs_srctree),$(abs_objtree))
232 # building in the source tree 236 # building in the source tree
233 srctree := . 237 srctree := .
234 building_out_of_srctree := 238 building_out_of_srctree :=
235 else 239 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 240 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237 # building in a subdirectory o 241 # building in a subdirectory of the source tree
238 srctree := .. 242 srctree := ..
239 else 243 else
240 srctree := $(abs_srctree) 244 srctree := $(abs_srctree)
241 endif 245 endif
242 building_out_of_srctree := 1 246 building_out_of_srctree := 1
243 endif 247 endif
244 248
245 ifneq ($(KBUILD_ABS_SRCTREE),) 249 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree) 250 srctree := $(abs_srctree)
247 endif 251 endif
248 252
249 objtree := . 253 objtree := .
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 254 VPATH := $(srctree)
256 endif <<
257 endif <<
258 255
259 export building_out_of_srctree srctree objtree 256 export building_out_of_srctree srctree objtree VPATH
260 257
261 # To make sure we do not include .config for a 258 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 259 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 260 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 261 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 262 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 263 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 264 # of make so .config is not included in this case either (for *config).
268 265
269 version_h := include/generated/uapi/linux/vers 266 version_h := include/generated/uapi/linux/version.h
270 267
271 clean-targets := %clean mrproper cleandocs 268 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 269 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 270 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers 271 $(version_h) headers headers_% archheaders archscripts \
275 %asm-generic kernelve 272 %asm-generic kernelversion %src-pkg dt_binding_check \
276 outputmakefile rustav !! 273 outputmakefile
277 no-sync-config-targets := $(no-dot-config-targ !! 274 # Installation targets should not require compiler. Unfortunately, vdso_install
>> 275 # is an exception where build artifacts may be updated. This must be fixed.
>> 276 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
>> 277 headers_install modules_install kernelrelease image_name
>> 278 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
278 image_name 279 image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 280 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
280 281
281 config-build := 282 config-build :=
282 mixed-build := 283 mixed-build :=
283 need-config := 1 284 need-config := 1
>> 285 need-compiler := 1
284 may-sync-config := 1 286 may-sync-config := 1
285 single-build := 287 single-build :=
286 288
287 ifneq ($(filter $(no-dot-config-targets), $(MA 289 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 290 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 291 need-config :=
290 endif !! 292 endif
291 endif 293 endif
292 294
293 ifneq ($(filter $(no-sync-config-targets), $(M !! 295 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 296 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 297 need-compiler :=
296 endif !! 298 endif
297 endif 299 endif
298 300
299 need-compiler := $(may-sync-config) !! 301 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 302 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 303 may-sync-config :=
>> 304 endif
>> 305 endif
300 306
301 ifneq ($(KBUILD_EXTMOD),) 307 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 308 may-sync-config :=
303 endif 309 endif
304 310
305 ifeq ($(KBUILD_EXTMOD),) 311 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 312 ifneq ($(filter %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 313 config-build := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 314 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 315 mixed-build := 1
>> 316 endif
310 endif 317 endif
311 endif <<
312 endif 318 endif
313 319
314 # We cannot build single targets and the other 320 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO 321 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 single-build := 1 !! 322 single-build := 1
317 ifneq ($(filter-out $(single-targets), $(M !! 323 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318 mixed-build := 1 !! 324 mixed-build := 1
319 endif !! 325 endif
320 endif 326 endif
321 327
322 # For "make -j clean all", "make -j mrproper d 328 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 329 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 330 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 331 mixed-build := 1
326 endif !! 332 endif
327 endif 333 endif
328 334
329 # install and modules_install need also be pro 335 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 336 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 337 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 338 mixed-build := 1
333 endif !! 339 endif
334 endif 340 endif
335 341
336 ifdef mixed-build 342 ifdef mixed-build
337 # ============================================ 343 # ===========================================================================
338 # We're called with mixed targets (*config and 344 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 345 # Handle them one by one.
340 346
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 347 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 348
343 $(MAKECMDGOALS): __build_one_by_one 349 $(MAKECMDGOALS): __build_one_by_one
344 @: 350 @:
345 351
346 __build_one_by_one: 352 __build_one_by_one:
347 $(Q)set -e; \ 353 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 354 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 355 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 356 done
351 357
352 else # !mixed-build 358 else # !mixed-build
353 359
354 include $(srctree)/scripts/Kbuild.include 360 include $(srctree)/scripts/Kbuild.include
355 361
356 # Read KERNELRELEASE from include/config/kerne 362 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 363 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 364 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 365 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 366
361 include $(srctree)/scripts/subarch.include 367 include $(srctree)/scripts/subarch.include
362 368
363 # Cross compiling and selecting different set 369 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 370 # ---------------------------------------------------------------------------
365 # 371 #
366 # When performing cross compilation for other 372 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 373 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 374 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 375 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 376 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 377 # The default ARCH is the host where make is executed.
372 378
373 # CROSS_COMPILE specify the prefix used for al 379 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 380 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 381 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 382 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 383 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 384 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 385 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 386 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 387 ARCH ?= $(SUBARCH)
382 388
383 # Architecture as present in compile.h 389 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 390 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 391 SRCARCH := $(ARCH)
386 392
387 # Additional ARCH settings for x86 393 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 394 ifeq ($(ARCH),i386)
389 SRCARCH := x86 395 SRCARCH := x86
390 endif 396 endif
391 ifeq ($(ARCH),x86_64) 397 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 398 SRCARCH := x86
393 endif 399 endif
394 400
395 # Additional ARCH settings for sparc 401 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 402 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 403 SRCARCH := sparc
398 endif 404 endif
399 ifeq ($(ARCH),sparc64) 405 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 406 SRCARCH := sparc
401 endif 407 endif
402 408
403 # Additional ARCH settings for parisc 409 # Additional ARCH settings for parisc
404 ifeq ($(ARCH),parisc64) 410 ifeq ($(ARCH),parisc64)
405 SRCARCH := parisc 411 SRCARCH := parisc
406 endif 412 endif
407 413
408 export cross_compiling := 414 export cross_compiling :=
409 ifneq ($(SRCARCH),$(SUBARCH)) 415 ifneq ($(SRCARCH),$(SUBARCH))
410 cross_compiling := 1 416 cross_compiling := 1
411 endif 417 endif
412 418
413 KCONFIG_CONFIG ?= .config 419 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 420 export KCONFIG_CONFIG
415 421
416 # SHELL used by kbuild 422 # SHELL used by kbuild
417 CONFIG_SHELL := sh 423 CONFIG_SHELL := sh
418 424
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 425 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 426 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 427 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 428
423 ifneq ($(LLVM),) 429 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),) 430 ifneq ($(filter %/,$(LLVM)),)
425 LLVM_PREFIX := $(LLVM) 431 LLVM_PREFIX := $(LLVM)
426 else ifneq ($(filter -%,$(LLVM)),) 432 else ifneq ($(filter -%,$(LLVM)),)
427 LLVM_SUFFIX := $(LLVM) 433 LLVM_SUFFIX := $(LLVM)
428 endif 434 endif
429 435
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) 436 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) 437 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
432 else 438 else
433 HOSTCC = gcc 439 HOSTCC = gcc
434 HOSTCXX = g++ 440 HOSTCXX = g++
435 endif 441 endif
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config 442 HOSTPKG_CONFIG = pkg-config
438 443
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto 444 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440 -O2 -fomit-frame-poin !! 445 -O2 -fomit-frame-pointer -std=gnu11 \
>> 446 -Wdeclaration-after-statement
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) 447 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) 448 KBUILD_USERLDFLAGS := $(USERLDFLAGS)
443 449
444 # These flags apply to all Rust code in the tr !! 450 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
445 # host programs. !! 451 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
446 export rust_common_flags := --edition=2021 \ <<
447 -Zbinary_dep_depin <<
448 -Astable_features <<
449 -Dunsafe_op_in_uns <<
450 -Dnon_ascii_idents <<
451 -Wrust_2018_idioms <<
452 -Wunreachable_pub <<
453 -Wmissing_docs \ <<
454 -Wrustdoc::missing <<
455 -Wclippy::all \ <<
456 -Wclippy::mut_mut <<
457 -Wclippy::needless <<
458 -Wclippy::needless <<
459 -Wclippy::no_mangl <<
460 -Wclippy::dbg_macr <<
461 <<
462 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS <<
463 $(HOSTCFLAGS) -I $(srct <<
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF <<
465 -I $(srctree)/scripts/i <<
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - <<
467 -Zallow-features= $(HO <<
468 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(H 452 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 453 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 454
471 # Make variables (CC, etc...) 455 # Make variables (CC, etc...)
472 CPP = $(CC) -E 456 CPP = $(CC) -E
473 ifneq ($(LLVM),) 457 ifneq ($(LLVM),)
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU 458 CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S 459 LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ 460 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ 461 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( 462 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( 463 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
480 READELF = $(LLVM_PREFIX)llvm-readelf$( 464 READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL 465 STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
482 else 466 else
483 CC = $(CROSS_COMPILE)gcc 467 CC = $(CROSS_COMPILE)gcc
484 LD = $(CROSS_COMPILE)ld 468 LD = $(CROSS_COMPILE)ld
485 AR = $(CROSS_COMPILE)ar 469 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 470 NM = $(CROSS_COMPILE)nm
487 OBJCOPY = $(CROSS_COMPILE)objcopy 471 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 472 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf 473 READELF = $(CROSS_COMPILE)readelf
490 STRIP = $(CROSS_COMPILE)strip 474 STRIP = $(CROSS_COMPILE)strip
491 endif 475 endif
492 RUSTC = rustc <<
493 RUSTDOC = rustdoc <<
494 RUSTFMT = rustfmt <<
495 CLIPPY_DRIVER = clippy-driver <<
496 BINDGEN = bindgen <<
497 PAHOLE = pahole 476 PAHOLE = pahole
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve 477 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX = flex 478 LEX = flex
500 YACC = bison 479 YACC = bison
501 AWK = awk 480 AWK = awk
502 INSTALLKERNEL := installkernel 481 INSTALLKERNEL := installkernel
>> 482 DEPMOD = depmod
503 PERL = perl 483 PERL = perl
504 PYTHON3 = python3 484 PYTHON3 = python3
505 CHECK = sparse 485 CHECK = sparse
506 BASH = bash 486 BASH = bash
507 KGZIP = gzip 487 KGZIP = gzip
508 KBZIP2 = bzip2 488 KBZIP2 = bzip2
509 KLZOP = lzop 489 KLZOP = lzop
510 LZMA = lzma 490 LZMA = lzma
511 LZ4 = lz4c 491 LZ4 = lz4c
512 XZ = xz 492 XZ = xz
513 ZSTD = zstd 493 ZSTD = zstd
514 494
>> 495 PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
>> 496
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 497 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 498 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := 499 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE = 500 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 501 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 502 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 503 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 504 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 505 LDFLAGS_vmlinux =
526 506
527 # Use USERINCLUDE when you must reference the 507 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 508 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 509 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 510 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 511 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 512 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li 513 -include $(srctree)/include/linux/compiler-version.h \
534 -include $(srctree)/include/li 514 -include $(srctree)/include/linux/kconfig.h
535 515
536 # Use LINUXINCLUDE when you must reference the 516 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 517 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 518 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 519 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 520 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree 521 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542 -I$(objtree)/include \ 522 -I$(objtree)/include \
543 $(USERINCLUDE) 523 $(USERINCLUDE)
544 524
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 525 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 !! 526 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS := !! 527 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11 !! 528 -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar !! 529 -Werror=return-type -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char !! 530 -std=gnu11
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 531 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ <<
557 -Cpanic=abort -Cembed-bitc <<
558 -Cforce-unwind-tables=n -C <<
559 -Csymbol-mangling-version= <<
560 -Crelocation-model=static <<
561 -Zfunction-sections=n \ <<
562 -Wclippy::float_arithmetic <<
563 <<
564 KBUILD_AFLAGS_KERNEL := 532 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 533 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 534 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 535 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE <<
570 KBUILD_LDFLAGS_MODULE := 536 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS := 537 KBUILD_LDFLAGS :=
572 CLANG_FLAGS := 538 CLANG_FLAGS :=
573 539
574 ifeq ($(KBUILD_CLIPPY),1) <<
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY <<
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) <<
577 else <<
578 RUSTC_OR_CLIPPY_QUIET := RUSTC <<
579 RUSTC_OR_CLIPPY = $(RUSTC) <<
580 endif <<
581 <<
582 ifdef RUST_LIB_SRC <<
583 export RUST_LIB_SRC <<
584 endif <<
585 <<
586 # Allows the usage of unstable features in sta <<
587 export RUSTC_BOOTSTRAP := 1 <<
588 <<
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K 540 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q <<
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS <<
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF 541 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ 542 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 543 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 544 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS 545 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
597 546
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 547 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 548 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF <<
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 549 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 550 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 551 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
>> 552 export PAHOLE_FLAGS
604 553
605 # Files to ignore in find ... statements 554 # Files to ignore in find ... statements
606 555
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 556 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 557 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 558 -prune -o
>> 559 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 560 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 561
611 # ============================================ 562 # ===========================================================================
612 # Rules shared between *config targets and bui 563 # Rules shared between *config targets and build targets
613 564
614 # Basic helpers built in scripts/basic/ 565 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic 566 PHONY += scripts_basic
616 scripts_basic: 567 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 568 $(Q)$(MAKE) $(build)=scripts/basic
618 569
619 PHONY += outputmakefile 570 PHONY += outputmakefile
620 ifdef building_out_of_srctree 571 ifdef building_out_of_srctree
621 # Before starting out-of-tree build, make sure 572 # Before starting out-of-tree build, make sure the source tree is clean.
622 # outputmakefile generates a Makefile in the o 573 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 574 # separate output directory. This allows convenient use of make in the
624 # output directory. 575 # output directory.
625 # At the same time when output Makefile genera 576 # At the same time when output Makefile generated, generate .gitignore to
626 # ignore whole output directory 577 # ignore whole output directory
627 578
628 quiet_cmd_makefile = GEN Makefile 579 quiet_cmd_makefile = GEN Makefile
629 cmd_makefile = { \ 580 cmd_makefile = { \
630 echo "\# Automatically generated by $( 581 echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
631 echo "include $(srctree)/Makefile"; \ 582 echo "include $(srctree)/Makefile"; \
632 } > Makefile 583 } > Makefile
633 584
634 outputmakefile: 585 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ !! 586 $(Q)if [ -f $(srctree)/.config -o \
636 -d $(srctree)/include/config 587 -d $(srctree)/include/config -o \
637 -d $(srctree)/arch/$(SRCARCH) 588 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
638 echo >&2 "***"; \ 589 echo >&2 "***"; \
639 echo >&2 "*** The source tree 590 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
640 echo >&2 "*** in $(abs_srctree 591 echo >&2 "*** in $(abs_srctree)";\
641 echo >&2 "***"; \ 592 echo >&2 "***"; \
642 false; \ 593 false; \
643 fi 594 fi
644 $(Q)ln -fsn $(srctree) source 595 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) 596 $(call cmd,makefile)
646 $(Q)test -e .gitignore || \ 597 $(Q)test -e .gitignore || \
647 { echo "# this is build directory, ign 598 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
648 endif 599 endif
649 600
650 # The expansion should be delayed until arch/$ 601 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a 602 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig ( 603 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det 604 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC 605 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
655 606
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), 607 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
657 include $(srctree)/scripts/Makefile.clang 608 include $(srctree)/scripts/Makefile.clang
658 endif 609 endif
659 610
660 # Include this also for config targets because 611 # Include this also for config targets because some architectures need
661 # cc-cross-prefix to determine CROSS_COMPILE. 612 # cc-cross-prefix to determine CROSS_COMPILE.
662 ifdef need-compiler 613 ifdef need-compiler
663 include $(srctree)/scripts/Makefile.compiler 614 include $(srctree)/scripts/Makefile.compiler
664 endif 615 endif
665 616
666 ifdef config-build 617 ifdef config-build
667 # ============================================ 618 # ===========================================================================
668 # *config targets only - make sure prerequisit 619 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 620 # in scripts/kconfig to make the *config target
670 621
671 # Read arch-specific Makefile to set KBUILD_DE !! 622 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 623 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 624 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile 625 include $(srctree)/arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 626 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676 627
677 config: outputmakefile scripts_basic FORCE 628 config: outputmakefile scripts_basic FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 629 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 630
680 %config: outputmakefile scripts_basic FORCE 631 %config: outputmakefile scripts_basic FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 632 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 633
683 else #!config-build 634 else #!config-build
684 # ============================================ 635 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 636 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 637 # targets and others. In general all targets except *config targets.
687 638
688 # If building an external module we do not car 639 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules 640 # but instead __all depend on modules
690 PHONY += all 641 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),) 642 ifeq ($(KBUILD_EXTMOD),)
692 __all: all 643 __all: all
693 else 644 else
694 __all: modules 645 __all: modules
695 endif 646 endif
696 647
697 targets := <<
698 <<
699 # Decide whether to build built-in, modular, o 648 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in. 649 # Normally, just do built-in.
701 650
702 KBUILD_MODULES := 651 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1 652 KBUILD_BUILTIN := 1
704 653
705 # If we have only "make modules", don't compil 654 # If we have only "make modules", don't compile built-in objects.
706 ifeq ($(MAKECMDGOALS),modules) 655 ifeq ($(MAKECMDGOALS),modules)
707 KBUILD_BUILTIN := 656 KBUILD_BUILTIN :=
708 endif 657 endif
709 658
710 # If we have "make <whatever> modules", compil 659 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway. 660 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module 661 # Just "make" or "make all" shall build modules as well
713 662
714 ifneq ($(filter all modules nsdeps %compile_co 663 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 664 KBUILD_MODULES := 1
716 endif 665 endif
717 666
718 ifeq ($(MAKECMDGOALS),) 667 ifeq ($(MAKECMDGOALS),)
719 KBUILD_MODULES := 1 668 KBUILD_MODULES := 1
720 endif 669 endif
721 670
722 export KBUILD_MODULES KBUILD_BUILTIN 671 export KBUILD_MODULES KBUILD_BUILTIN
723 672
724 ifdef need-config 673 ifdef need-config
725 include include/config/auto.conf 674 include include/config/auto.conf
726 endif 675 endif
727 676
728 ifeq ($(KBUILD_EXTMOD),) 677 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs 678 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y := !! 679 core-y := init/ usr/ arch/$(SRCARCH)/
731 drivers-y := !! 680 drivers-y := drivers/ sound/
>> 681 drivers-$(CONFIG_SAMPLES) += samples/
>> 682 drivers-$(CONFIG_NET) += net/
>> 683 drivers-y += virt/
732 libs-y := lib/ 684 libs-y := lib/
733 endif # KBUILD_EXTMOD 685 endif # KBUILD_EXTMOD
734 686
735 # The all: target is the default when no targe 687 # The all: target is the default when no target is given on the
736 # command line. 688 # command line.
737 # This allow a user to issue only 'make' to bu 689 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 690 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 691 all: vmlinux
740 692
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover 693 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
742 ifdef CONFIG_CC_IS_GCC 694 ifdef CONFIG_CC_IS_GCC
743 CFLAGS_GCOV += -fno-tree-loop-im 695 CFLAGS_GCOV += -fno-tree-loop-im
744 endif 696 endif
745 export CFLAGS_GCOV 697 export CFLAGS_GCOV
746 698
747 # The arch Makefiles can override CC_FLAGS_FTR 699 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER 700 ifdef CONFIG_FUNCTION_TRACER
749 CC_FLAGS_FTRACE := -pg 701 CC_FLAGS_FTRACE := -pg
750 endif 702 endif
751 703
752 include $(srctree)/arch/$(SRCARCH)/Makefile 704 include $(srctree)/arch/$(SRCARCH)/Makefile
753 705
754 ifdef need-config 706 ifdef need-config
755 ifdef may-sync-config 707 ifdef may-sync-config
756 # Read in dependencies to all Kconfig* files, 708 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include 709 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP 710 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd 711 include include/config/auto.conf.cmd
760 712
761 $(KCONFIG_CONFIG): 713 $(KCONFIG_CONFIG):
762 @echo >&2 '***' 714 @echo >&2 '***'
763 @echo >&2 '*** Configuration file "$@" 715 @echo >&2 '*** Configuration file "$@" not found!'
764 @echo >&2 '***' 716 @echo >&2 '***'
765 @echo >&2 '*** Please run some configu 717 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
766 @echo >&2 '*** "make menuconfig" or "m 718 @echo >&2 '*** "make menuconfig" or "make xconfig").'
767 @echo >&2 '***' 719 @echo >&2 '***'
768 @/bin/false 720 @/bin/false
769 721
770 # The actual configuration files used during t 722 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda 723 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con 724 # include/config/auto.conf (which mirrors .config).
773 # 725 #
774 # This exploits the 'multi-target pattern rule 726 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once 727 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b 728 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
777 # 729 #
778 # Do not use $(call cmd,...) here. That would 730 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
779 # so you cannot notice that Kconfig is waiting 731 # so you cannot notice that Kconfig is waiting for the user input.
780 %/config/auto.conf %/config/auto.conf.cmd %/ge !! 732 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
781 $(Q)$(kecho) " SYNC $@" 733 $(Q)$(kecho) " SYNC $@"
782 $(Q)$(MAKE) -f $(srctree)/Makefile syn 734 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config 735 else # !may-sync-config
784 # External modules and some install targets ne 736 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care 737 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test 738 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf 739 PHONY += include/config/auto.conf
788 740
789 include/config/auto.conf: 741 include/config/auto.conf:
790 @test -e include/generated/autoconf.h !! 742 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
791 echo >&2; 743 echo >&2; \
792 echo >&2 " ERROR: Kernel configuratio 744 echo >&2 " ERROR: Kernel configuration is invalid."; \
793 echo >&2 " include/generated/a 745 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
794 echo >&2 " Run 'make oldconfig 746 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
795 echo >&2 ; 747 echo >&2 ; \
796 /bin/false) 748 /bin/false)
797 749
798 endif # may-sync-config 750 endif # may-sync-config
799 endif # need-config 751 endif # need-config
800 752
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch 753 KBUILD_CFLAGS += -fno-delete-null-pointer-checks
>> 754 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 755 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 756 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 757 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
802 758
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 759 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
804 KBUILD_CFLAGS += -O2 760 KBUILD_CFLAGS += -O2
805 KBUILD_RUSTFLAGS += -Copt-level=2 <<
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 761 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
807 KBUILD_CFLAGS += -Os 762 KBUILD_CFLAGS += -Os
808 KBUILD_RUSTFLAGS += -Copt-level=s <<
809 endif 763 endif
810 764
811 # Always set `debug-assertions` and `overflow- <<
812 # depends on `opt-level` and `debug-assertions <<
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( <<
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C <<
815 <<
816 # Tell gcc to never replace conditional load w 765 # Tell gcc to never replace conditional load with a non-conditional one
817 ifdef CONFIG_CC_IS_GCC 766 ifdef CONFIG_CC_IS_GCC
818 # gcc-10 renamed --param=allow-store-data-race 767 # gcc-10 renamed --param=allow-store-data-races=0 to
819 # -fno-allow-store-data-races. 768 # -fno-allow-store-data-races.
820 KBUILD_CFLAGS += $(call cc-option,--param=al 769 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 770 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
822 endif 771 endif
823 772
824 ifdef CONFIG_READABLE_ASM 773 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 774 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 775 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 776 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 777 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- 778 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
830 endif 779 endif
831 780
>> 781 ifneq ($(CONFIG_FRAME_WARN),0)
>> 782 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
>> 783 endif
>> 784
832 stackp-flags-y 785 stackp-flags-y := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR) 786 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 787 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
835 788
836 KBUILD_CFLAGS += $(stackp-flags-y) 789 KBUILD_CFLAGS += $(stackp-flags-y)
837 790
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 791 KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 792 KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
>> 793 KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
>> 794
>> 795 ifdef CONFIG_CC_IS_CLANG
>> 796 KBUILD_CPPFLAGS += -Qunused-arguments
>> 797 # The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable.
>> 798 KBUILD_CFLAGS += -Wno-gnu
>> 799 else
>> 800
>> 801 # gcc inanely warns about local variables called 'main'
>> 802 KBUILD_CFLAGS += -Wno-main
>> 803 endif
>> 804
>> 805 # These warnings generated too much noise in a regular build.
>> 806 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 807 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
>> 808 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
>> 809
>> 810 # These result in bogus false positives
>> 811 KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
840 812
841 ifdef CONFIG_FRAME_POINTER 813 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 814 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 815 else
845 # Some targets (ARM with Thumb2, for example), 816 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 817 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 818 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 819 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 820 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER 821 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 822 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 823 endif
855 endif 824 endif
856 825
857 # Initialize all stack variables with a 0xAA p 826 # Initialize all stack variables with a 0xAA pattern.
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN 827 ifdef CONFIG_INIT_STACK_ALL_PATTERN
859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 828 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
860 endif 829 endif
861 830
862 # Initialize all stack variables with a zero v 831 # Initialize all stack variables with a zero value.
863 ifdef CONFIG_INIT_STACK_ALL_ZERO 832 ifdef CONFIG_INIT_STACK_ALL_ZERO
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer 833 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 834 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
866 # https://github.com/llvm/llvm-project/issues/ 835 # https://github.com/llvm/llvm-project/issues/44842
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 836 KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER <<
869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA <<
870 endif 837 endif
871 endif 838 endif
872 839
873 # While VLAs have been removed, GCC produces u 840 # While VLAs have been removed, GCC produces unreachable stack probes
874 # for the randomize_kstack_offset feature. Dis 841 # for the randomize_kstack_offset feature. Disable it for all compilers.
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac 842 KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
876 843
877 # Clear used registers at func exit (to reduce 844 # Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
878 ifdef CONFIG_ZERO_CALL_USED_REGS 845 ifdef CONFIG_ZERO_CALL_USED_REGS
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- 846 KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr
880 endif 847 endif
881 848
882 ifdef CONFIG_FUNCTION_TRACER 849 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 850 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
884 CC_FLAGS_FTRACE += -mrecord-mcount 851 CC_FLAGS_FTRACE += -mrecord-mcount
885 ifdef CONFIG_HAVE_NOP_MCOUNT 852 ifdef CONFIG_HAVE_NOP_MCOUNT
886 ifeq ($(call cc-option-yn, -mnop-mcount),y 853 ifeq ($(call cc-option-yn, -mnop-mcount),y)
887 CC_FLAGS_FTRACE += -mnop-mcount 854 CC_FLAGS_FTRACE += -mnop-mcount
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 855 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
889 endif 856 endif
890 endif 857 endif
891 endif 858 endif
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 859 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT !! 860 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU <<
895 endif <<
896 endif 861 endif
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 862 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
898 ifdef CONFIG_HAVE_C_RECORDMCOUNT 863 ifdef CONFIG_HAVE_C_RECORDMCOUNT
899 BUILD_C_RECORDMCOUNT := y 864 BUILD_C_RECORDMCOUNT := y
900 export BUILD_C_RECORDMCOUNT 865 export BUILD_C_RECORDMCOUNT
901 endif 866 endif
902 endif 867 endif
903 ifdef CONFIG_HAVE_FENTRY 868 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr 869 # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
905 ifeq ($(call cc-option-yn, -mfentry),y) 870 ifeq ($(call cc-option-yn, -mfentry),y)
906 CC_FLAGS_FTRACE += -mfentry 871 CC_FLAGS_FTRACE += -mfentry
907 CC_FLAGS_USING += -DCC_USING_FENTRY 872 CC_FLAGS_USING += -DCC_USING_FENTRY
908 endif 873 endif
909 endif 874 endif
910 export CC_FLAGS_FTRACE 875 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 876 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 877 KBUILD_AFLAGS += $(CC_FLAGS_USING)
913 endif 878 endif
914 879
915 # We trigger additional mismatches with less i 880 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 881 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- 882 KBUILD_CFLAGS += -fno-inline-functions-called-once
918 endif 883 endif
919 884
920 # `rustc`'s `-Zfunction-sections` applies to d <<
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 885 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 886 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections 887 LDFLAGS_vmlinux += --gc-sections
925 endif 888 endif
926 889
927 ifdef CONFIG_SHADOW_CALL_STACK 890 ifdef CONFIG_SHADOW_CALL_STACK
928 ifndef CONFIG_DYNAMIC_SCS <<
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac 891 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 892 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
931 endif <<
932 export CC_FLAGS_SCS 893 export CC_FLAGS_SCS
933 endif 894 endif
934 895
935 ifdef CONFIG_LTO_CLANG 896 ifdef CONFIG_LTO_CLANG
936 ifdef CONFIG_LTO_CLANG_THIN 897 ifdef CONFIG_LTO_CLANG_THIN
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 898 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
>> 899 KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
938 else 900 else
939 CC_FLAGS_LTO := -flto 901 CC_FLAGS_LTO := -flto
940 endif 902 endif
941 CC_FLAGS_LTO += -fvisibility=hidden 903 CC_FLAGS_LTO += -fvisibility=hidden
942 904
943 # Limit inlining across translation units to r 905 # Limit inlining across translation units to reduce binary size
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 906 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
>> 907
>> 908 # Check for frame size exceeding threshold during prolog/epilog insertion
>> 909 # when using lld < 13.0.0.
>> 910 ifneq ($(CONFIG_FRAME_WARN),0)
>> 911 ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
>> 912 KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
>> 913 endif
>> 914 endif
945 endif 915 endif
946 916
947 ifdef CONFIG_LTO 917 ifdef CONFIG_LTO
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 918 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
949 KBUILD_AFLAGS += -fno-lto 919 KBUILD_AFLAGS += -fno-lto
950 export CC_FLAGS_LTO 920 export CC_FLAGS_LTO
951 endif 921 endif
952 922
953 ifdef CONFIG_CFI_CLANG 923 ifdef CONFIG_CFI_CLANG
954 CC_FLAGS_CFI := -fsanitize=kcfi !! 924 CC_FLAGS_CFI := -fsanitize=cfi \
>> 925 -fsanitize-cfi-cross-dso \
>> 926 -fno-sanitize-cfi-canonical-jump-tables \
>> 927 -fno-sanitize-trap=cfi \
>> 928 -fno-sanitize-blacklist
>> 929
>> 930 ifdef CONFIG_CFI_PERMISSIVE
>> 931 CC_FLAGS_CFI += -fsanitize-recover=cfi
>> 932 endif
>> 933
>> 934 # If LTO flags are filtered out, we must also filter out CFI.
>> 935 CC_FLAGS_LTO += $(CC_FLAGS_CFI)
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 936 KBUILD_CFLAGS += $(CC_FLAGS_CFI)
956 export CC_FLAGS_CFI 937 export CC_FLAGS_CFI
957 endif 938 endif
958 939
959 # Architectures can define flags to add/remove !! 940 ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 941 KBUILD_CFLAGS += -falign-functions=64
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 <<
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) <<
965 # Set the minimal function alignment. Use the <<
966 # -fmin-function-alignment if it is available, <<
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
970 else <<
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
972 endif <<
973 endif 942 endif
974 943
975 # arch Makefile may override CC so keep this a 944 # arch Makefile may override CC so keep this after arch Makefile is included
976 NOSTDINC_FLAGS += -nostdinc 945 NOSTDINC_FLAGS += -nostdinc
977 946
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 947 # warn about C99 declaration after statement
979 # the kernel uses only C99 flexible arrays for !! 948 KBUILD_CFLAGS += -Wdeclaration-after-statement
980 # arrays. Enforce this for everything that may !! 949
981 # perform bounds checking. !! 950 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl !! 951 KBUILD_CFLAGS += -Wvla
983 !! 952
984 #Currently, disable -Wstringop-overflow for GC !! 953 # disable pointer signed / unsigned warnings in gcc 4.0
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW !! 954 KBUILD_CFLAGS += -Wno-pointer-sign
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + !! 955
>> 956 # In order to make sure new function cast mismatches are not introduced
>> 957 # in the kernel (to avoid tripping CFI checking), the kernel should be
>> 958 # globally built with -Wcast-function-type.
>> 959 KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
>> 960
>> 961 # disable stringop warnings in gcc 8+
>> 962 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
>> 963
>> 964 # We'll want to enable this eventually, but it's not going away for 5.7 at least
>> 965 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
>> 966
>> 967 # Another good warning that we'll want to enable eventually
>> 968 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
>> 969
>> 970 # Enabled with W=2, disabled by default as noisy
>> 971 ifdef CONFIG_CC_IS_GCC
>> 972 KBUILD_CFLAGS += -Wno-maybe-uninitialized
>> 973 endif
>> 974
>> 975 ifdef CONFIG_CC_IS_GCC
>> 976 # The allocators already balk at large sizes, so silence the compiler
>> 977 # warnings for bounds checks involving those possible values. While
>> 978 # -Wno-alloc-size-larger-than would normally be used here, earlier versions
>> 979 # of gcc (<9.1) weirdly don't handle the option correctly when _other_
>> 980 # warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
>> 981 # doesn't work (as it is documented to), silently resolving to "0" prior to
>> 982 # version 9.1 (and producing an error more recently). Numeric values larger
>> 983 # than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
>> 984 # ignored, continuing to default to PTRDIFF_MAX. So, left with no other
>> 985 # choice, we must perform a versioned check to disable this warning.
>> 986 # https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
>> 987 KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than)
>> 988 endif
987 989
988 # disable invalid "can't wrap" optimizations f 990 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow 991 KBUILD_CFLAGS += -fno-strict-overflow
990 992
991 # Make sure -fstack-check isn't enabled (like 993 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check 994 KBUILD_CFLAGS += -fno-stack-check
993 995
994 # conserve stack if available 996 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC 997 ifdef CONFIG_CC_IS_GCC
996 KBUILD_CFLAGS += -fconserve-stack 998 KBUILD_CFLAGS += -fconserve-stack
997 endif 999 endif
998 1000
>> 1001 # Prohibit date/time macros, which would make the build non-deterministic
>> 1002 KBUILD_CFLAGS += -Werror=date-time
>> 1003
>> 1004 # enforce correct pointer usage
>> 1005 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>> 1006
>> 1007 # Require designated initializers for all marked structures
>> 1008 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
>> 1009
999 # change __FILE__ to the relative path from th 1010 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p 1011 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001 1012
1002 # include additional Makefiles when needed 1013 # include additional Makefiles when needed
1003 include-y := scripts/Ma 1014 include-y := scripts/Makefile.extrawarn
1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma 1015 include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma <<
1006 include-$(CONFIG_KASAN) += scripts/Ma 1016 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
1007 include-$(CONFIG_KCSAN) += scripts/Ma 1017 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
1008 include-$(CONFIG_KMSAN) += scripts/Ma <<
1009 include-$(CONFIG_UBSAN) += scripts/Ma 1018 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
1010 include-$(CONFIG_KCOV) += scripts/Ma 1019 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
1011 include-$(CONFIG_RANDSTRUCT) += scripts/Ma 1020 include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct
1012 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma 1021 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
1013 1022
1014 include $(addprefix $(srctree)/, $(include-y) 1023 include $(addprefix $(srctree)/, $(include-y))
1015 1024
1016 # scripts/Makefile.gcc-plugins is intentional 1025 # scripts/Makefile.gcc-plugins is intentionally included last.
1017 # Do not add $(call cc-option,...) below this 1026 # Do not add $(call cc-option,...) below this line. When you build the kernel
1018 # from the clean source tree, the GCC plugins 1027 # from the clean source tree, the GCC plugins do not exist at this point.
1019 1028
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS !! 1029 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1030 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1022 KBUILD_AFLAGS += $(KAFLAGS) 1031 KBUILD_AFLAGS += $(KAFLAGS)
1023 KBUILD_CFLAGS += $(KCFLAGS) 1032 KBUILD_CFLAGS += $(KCFLAGS)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) <<
1025 1033
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1034 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1027 LDFLAGS_vmlinux += --build-id=sha1 1035 LDFLAGS_vmlinux += --build-id=sha1
1028 1036
1029 KBUILD_LDFLAGS += -z noexecstack 1037 KBUILD_LDFLAGS += -z noexecstack
1030 ifeq ($(CONFIG_LD_IS_BFD),y) 1038 ifeq ($(CONFIG_LD_IS_BFD),y)
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn 1039 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
1032 endif 1040 endif
1033 1041
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1042 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X !! 1043 LDFLAGS_vmlinux += $(call ld-option, -X,)
1036 endif 1044 endif
1037 1045
1038 ifeq ($(CONFIG_RELR),y) 1046 ifeq ($(CONFIG_RELR),y)
1039 # ld.lld before 15 did not support -z pack-re !! 1047 LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1041 endif 1048 endif
1042 1049
1043 # We never want expected sections to be place 1050 # We never want expected sections to be placed heuristically by the
1044 # linker. All sections should be explicitly n 1051 # linker. All sections should be explicitly named in the linker script.
1045 ifdef CONFIG_LD_ORPHAN_WARN 1052 ifdef CONFIG_LD_ORPHAN_WARN
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG !! 1053 LDFLAGS_vmlinux += --orphan-handling=warn
1047 endif 1054 endif
1048 1055
1049 # Align the bit size of userspace programs wi 1056 # Align the bit size of userspace programs with the kernel
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta 1057 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta 1058 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1052 1059
1053 # make the checker run with the right archite 1060 # make the checker run with the right architecture
1054 CHECKFLAGS += --arch=$(ARCH) 1061 CHECKFLAGS += --arch=$(ARCH)
1055 1062
1056 # insure the checker run with the right endia 1063 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 1064 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058 1065
1059 # the checker needs the correct machine size 1066 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1067 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061 1068
1062 # Default kernel image to build when no speci 1069 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 1070 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 1071 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 1072 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 1073 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 1074 export KBUILD_IMAGE ?= vmlinux
1068 1075
1069 # 1076 #
1070 # INSTALL_PATH specifies where to place the u 1077 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 1078 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 1079 export INSTALL_PATH ?= /boot
1073 1080
1074 # 1081 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 1082 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 1083 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 1084 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 1085 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 1086 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 1087
1081 # 1088 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 1089 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 1090 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 1091 # makefile but the argument can be passed to make if needed.
1085 # 1092 #
1086 1093
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 1094 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 1095 export MODLIB
1089 1096
1090 PHONY += prepare0 1097 PHONY += prepare0
1091 1098
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), 1099 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1093 export MODORDER := $(extmod_prefix)modules.or 1100 export MODORDER := $(extmod_prefix)modules.order
1094 export MODULES_NSDEPS := $(extmod_prefix)modu 1101 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1095 1102
1096 ifeq ($(KBUILD_EXTMOD),) 1103 ifeq ($(KBUILD_EXTMOD),)
>> 1104 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
>> 1105 core-$(CONFIG_BLOCK) += block/
>> 1106 core-$(CONFIG_IO_URING) += io_uring/
>> 1107
>> 1108 vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
>> 1109 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 1110 $(libs-y) $(libs-m)))
1097 1111
1098 build-dir := . !! 1112 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1099 clean-dirs := $(sort . Documentation \ <<
1100 $(patsubst %/,%,$(filter 1113 $(patsubst %/,%,$(filter %/, $(core-) \
1101 $(drivers-) $(libs-)) 1114 $(drivers-) $(libs-))))
1102 1115
1103 export ARCH_CORE := $(core-y) !! 1116 build-dirs := $(vmlinux-dirs)
1104 export ARCH_LIB := $(filter %/, $(lib !! 1117 clean-dirs := $(vmlinux-alldirs)
1105 export ARCH_DRIVERS := $(drivers-y) $(dri <<
1106 # Externally visible symbols (used by link-vm <<
1107 1118
1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 1119 subdir-modorder := $(addsuffix /modules.order, $(build-dirs))
>> 1120
>> 1121 # Externally visible symbols (used by link-vmlinux.sh)
>> 1122 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
>> 1123 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1109 ifdef CONFIG_MODULES 1124 ifdef CONFIG_MODULES
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a 1125 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib 1126 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1112 else 1127 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, 1128 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1114 endif 1129 endif
>> 1130 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1115 1131
1116 export KBUILD_VMLINUX_LIBS !! 1132 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1117 export KBUILD_LDS := arch/$(SRCARCH) 1133 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 1134 # used by scripts/Makefile.package
>> 1135 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
>> 1136
>> 1137 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1118 1138
>> 1139 # Recurse until adjust_autoksyms.sh is satisfied
>> 1140 PHONY += autoksyms_recursive
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1141 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the 1142 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi 1143 # we have to build modules as well to determine what those symbols are.
>> 1144 # (this can be evaluated only once include/config/auto.conf has been included)
1122 KBUILD_MODULES := 1 1145 KBUILD_MODULES := 1
>> 1146
>> 1147 autoksyms_recursive: descend modules.order
>> 1148 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
>> 1149 "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
1123 endif 1150 endif
1124 1151
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1152 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1126 quiet_cmd_ar_vmlinux.a = AR $@ <<
1127 cmd_ar_vmlinux.a = \ <<
1128 rm -f $@; \ <<
1129 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS <<
1130 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) <<
1131 <<
1132 targets += vmlinux.a <<
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea <<
1134 $(call if_changed,ar_vmlinux.a) <<
1135 <<
1136 PHONY += vmlinux_o <<
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) <<
1138 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1139 1153
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1154 quiet_cmd_autoksyms_h = GEN $@
1141 @: !! 1155 cmd_autoksyms_h = mkdir -p $(dir $@); \
>> 1156 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
>> 1157
>> 1158 $(autoksyms_h):
>> 1159 $(call cmd,autoksyms_h)
>> 1160
>> 1161 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
>> 1162
>> 1163 # Final link of vmlinux with optional arch pass after final link
>> 1164 cmd_link-vmlinux = \
>> 1165 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
>> 1166 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
>> 1167
>> 1168 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
>> 1169 +$(call if_changed_dep,link-vmlinux)
1142 1170
1143 PHONY += vmlinux !! 1171 targets := vmlinux
1144 # LDFLAGS_vmlinux in the top Makefile defines <<
1145 # not for decompressors. LDFLAGS_vmlinux in a <<
1146 # unrelated; the decompressors just happen to <<
1147 # arch/*/boot/compressed/vmlinux. <<
1148 # Export LDFLAGS_vmlinux only to scripts/Make <<
1149 # <<
1150 # _LDFLAGS_vmlinux is a workaround for the 'p <<
1151 # https://savannah.gnu.org/bugs/?61463 <<
1152 # For Make > 4.4, the following simple code w <<
1153 # vmlinux: private export LDFLAGS_vmlinux := <<
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG <<
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ <<
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost <<
1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1158 1172
1159 # The actual objects are generated when desce 1173 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1174 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1175 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1162 1176
1163 ifeq ($(origin KERNELRELEASE),file) !! 1177 filechk_kernel.release = \
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1178 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1165 else <<
1166 filechk_kernel.release = echo $(KERNELRELEASE <<
1167 endif <<
1168 1179
1169 # Store (new) KERNELRELEASE string in include 1180 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE 1181 include/config/kernel.release: FORCE
1171 $(call filechk,kernel.release) 1182 $(call filechk,kernel.release)
1172 1183
1173 # Additional helpers built in scripts/ 1184 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr 1185 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel 1186 # in parallel
1176 PHONY += scripts 1187 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc 1188 scripts: scripts_basic scripts_dtc
1178 $(Q)$(MAKE) $(build)=$(@) 1189 $(Q)$(MAKE) $(build)=$(@)
1179 1190
1180 # Things we need to do before we recursively 1191 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1192 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1193 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1194 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1195 # version.h and scripts_basic is processed / created.
1185 1196
1186 PHONY += prepare archprepare 1197 PHONY += prepare archprepare
1187 1198
1188 archprepare: outputmakefile archheaders archs 1199 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1189 asm-generic $(version_h) include/gene !! 1200 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1190 include/generated/compile.h include/g !! 1201 include/generated/autoconf.h remove-stale-files
1191 1202
1192 prepare0: archprepare 1203 prepare0: archprepare
1193 $(Q)$(MAKE) $(build)=scripts/mod 1204 $(Q)$(MAKE) $(build)=scripts/mod
1194 $(Q)$(MAKE) $(build)=. prepare !! 1205 $(Q)$(MAKE) $(build)=.
1195 1206
1196 # All the preparing.. 1207 # All the preparing..
1197 prepare: prepare0 1208 prepare: prepare0
1198 ifdef CONFIG_RUST <<
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1200 $(Q)$(MAKE) $(build)=rust <<
1201 endif <<
1202 1209
1203 PHONY += remove-stale-files 1210 PHONY += remove-stale-files
1204 remove-stale-files: 1211 remove-stale-files:
1205 $(Q)$(srctree)/scripts/remove-stale-f 1212 $(Q)$(srctree)/scripts/remove-stale-files
1206 1213
1207 # Support for using generic headers in asm-ge 1214 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1215 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209 1216
1210 PHONY += asm-generic uapi-asm-generic 1217 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic 1218 asm-generic: uapi-asm-generic
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1219 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1213 generic=include/asm-generic 1220 generic=include/asm-generic
1214 uapi-asm-generic: 1221 uapi-asm-generic:
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1222 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1216 generic=include/uapi/asm-generic 1223 generic=include/uapi/asm-generic
1217 1224
1218 # Generate some files 1225 # Generate some files
1219 # ------------------------------------------- 1226 # ---------------------------------------------------------------------------
1220 1227
1221 # KERNELRELEASE can change from a few differe 1228 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1229 # needs to be updated, so this check is forced on all builds
1223 1230
1224 uts_len := 64 1231 uts_len := 64
1225 define filechk_utsrelease.h 1232 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1233 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1234 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1235 exit 1; \
1229 fi; 1236 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR 1237 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef 1238 endef
1232 1239
1233 define filechk_version.h 1240 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then 1241 if [ $(SUBLEVEL) -gt 255 ]; then \
1235 echo \#define LINUX_VERSION_C 1242 echo \#define LINUX_VERSION_CODE $(shell \
1236 expr $(VERSION) \* 65536 + $( 1243 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1237 else 1244 else \
1238 echo \#define LINUX_VERSION_C 1245 echo \#define LINUX_VERSION_CODE $(shell \
1239 expr $(VERSION) \* 65536 + $( 1246 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1240 fi; 1247 fi; \
1241 echo '#define KERNEL_VERSION(a,b,c) ( 1248 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
1242 ((c) > 255 ? 255 : (c)))'; 1249 ((c) > 255 ? 255 : (c)))'; \
1243 echo \#define LINUX_VERSION_MAJOR $(V 1250 echo \#define LINUX_VERSION_MAJOR $(VERSION); \
1244 echo \#define LINUX_VERSION_PATCHLEVE 1251 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
1245 echo \#define LINUX_VERSION_SUBLEVEL 1252 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1246 endef 1253 endef
1247 1254
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1255 $(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
1249 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1256 $(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
1250 $(version_h): FORCE 1257 $(version_h): FORCE
1251 $(call filechk,version.h) 1258 $(call filechk,version.h)
1252 1259
1253 include/generated/utsrelease.h: include/confi 1260 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1261 $(call filechk,utsrelease.h)
1255 1262
1256 filechk_compile.h = $(srctree)/scripts/mkcomp <<
1257 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION <<
1258 <<
1259 include/generated/compile.h: FORCE <<
1260 $(call filechk,compile.h) <<
1261 <<
1262 PHONY += headerdep 1263 PHONY += headerdep
1263 headerdep: 1264 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1265 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1266 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1267
1267 # ------------------------------------------- 1268 # ---------------------------------------------------------------------------
1268 # Kernel headers 1269 # Kernel headers
1269 1270
1270 #Default location for installed headers 1271 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1272 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1273
1273 quiet_cmd_headers_install = INSTALL $(INSTALL 1274 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1274 cmd_headers_install = \ 1275 cmd_headers_install = \
1275 mkdir -p $(INSTALL_HDR_PATH); \ 1276 mkdir -p $(INSTALL_HDR_PATH); \
1276 rsync -mrl --include='*/' --include=' 1277 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1277 usr/include $(INSTALL_HDR_PATH) 1278 usr/include $(INSTALL_HDR_PATH)
1278 1279
1279 PHONY += headers_install 1280 PHONY += headers_install
1280 headers_install: headers 1281 headers_install: headers
1281 $(call cmd,headers_install) 1282 $(call cmd,headers_install)
1282 1283
1283 PHONY += archheaders archscripts 1284 PHONY += archheaders archscripts
1284 1285
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he 1286 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1286 1287
1287 PHONY += headers 1288 PHONY += headers
1288 headers: $(version_h) scripts_unifdef uapi-as 1289 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1289 $(if $(filter um, $(SRCARCH)), $(erro 1290 $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1291 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1292 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1292 1293
1293 ifdef CONFIG_HEADERS_INSTALL 1294 ifdef CONFIG_HEADERS_INSTALL
1294 prepare: headers 1295 prepare: headers
1295 endif 1296 endif
1296 1297
1297 PHONY += scripts_unifdef 1298 PHONY += scripts_unifdef
1298 scripts_unifdef: scripts_basic 1299 scripts_unifdef: scripts_basic
1299 $(Q)$(MAKE) $(build)=scripts scripts/ 1300 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1300 1301
1301 # ------------------------------------------- 1302 # ---------------------------------------------------------------------------
1302 # Install 1303 # Install
1303 1304
1304 # Many distributions have the custom install 1305 # Many distributions have the custom install script, /sbin/installkernel.
1305 # If DKMS is installed, 'make install' will e 1306 # If DKMS is installed, 'make install' will eventually recurse back
1306 # to this Makefile to build and install exter 1307 # to this Makefile to build and install external modules.
1307 # Cancel sub_make_done so that options such a 1308 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1308 1309
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) 1310 quiet_cmd_install = INSTALL $(INSTALL_PATH)
1310 cmd_install = unset sub_make_done; $(sr 1311 cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
1311 1312
1312 # ------------------------------------------- 1313 # ---------------------------------------------------------------------------
1313 # vDSO install <<
1314 <<
1315 PHONY += vdso_install <<
1316 vdso_install: export INSTALL_FILES = $(vdso-i <<
1317 vdso_install: <<
1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1319 <<
1320 # ------------------------------------------- <<
1321 # Tools 1314 # Tools
1322 1315
1323 ifdef CONFIG_OBJTOOL 1316 ifdef CONFIG_OBJTOOL
1324 prepare: tools/objtool 1317 prepare: tools/objtool
1325 endif 1318 endif
1326 1319
1327 ifdef CONFIG_BPF 1320 ifdef CONFIG_BPF
1328 ifdef CONFIG_DEBUG_INFO_BTF 1321 ifdef CONFIG_DEBUG_INFO_BTF
1329 prepare: tools/bpf/resolve_btfids 1322 prepare: tools/bpf/resolve_btfids
1330 endif 1323 endif
1331 endif 1324 endif
1332 1325
1333 # The tools build system is not a part of Kbu <<
1334 # its own unique issues. If you need to integ <<
1335 # please consider locating that tool outside <<
1336 # standard Kbuild "hostprogs" syntax instead <<
1337 # here. See Documentation/kbuild/makefiles.rs <<
1338 <<
1339 PHONY += resolve_btfids_clean 1326 PHONY += resolve_btfids_clean
1340 1327
1341 resolve_btfids_O = $(abspath $(objtree))/tool 1328 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1342 1329
1343 # tools/bpf/resolve_btfids directory might no 1330 # tools/bpf/resolve_btfids directory might not exist
1344 # in output directory, skip its clean in that 1331 # in output directory, skip its clean in that case
1345 resolve_btfids_clean: 1332 resolve_btfids_clean:
1346 ifneq ($(wildcard $(resolve_btfids_O)),) 1333 ifneq ($(wildcard $(resolve_btfids_O)),)
1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ 1334 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1348 endif 1335 endif
1349 1336
1350 # Clear a bunch of variables before executing 1337 # Clear a bunch of variables before executing the submake
1351 ifeq ($(quiet),silent_) 1338 ifeq ($(quiet),silent_)
1352 tools_silent=s 1339 tools_silent=s
1353 endif 1340 endif
1354 1341
1355 tools/: FORCE 1342 tools/: FORCE
1356 $(Q)mkdir -p $(objtree)/tools 1343 $(Q)mkdir -p $(objtree)/tools
1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1344 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1358 1345
1359 tools/%: FORCE 1346 tools/%: FORCE
1360 $(Q)mkdir -p $(objtree)/tools 1347 $(Q)mkdir -p $(objtree)/tools
1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1348 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1362 1349
1363 # ------------------------------------------- 1350 # ---------------------------------------------------------------------------
1364 # Kernel selftest 1351 # Kernel selftest
1365 1352
1366 PHONY += kselftest 1353 PHONY += kselftest
1367 kselftest: headers 1354 kselftest: headers
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1355 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369 1356
1370 kselftest-%: headers FORCE 1357 kselftest-%: headers FORCE
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi 1358 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1372 1359
1373 PHONY += kselftest-merge 1360 PHONY += kselftest-merge
1374 kselftest-merge: 1361 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1362 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1363 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1377 xargs $(srctree)/scripts/kcon !! 1364 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1365 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379 1366
1380 # ------------------------------------------- 1367 # ---------------------------------------------------------------------------
1381 # Devicetree files 1368 # Devicetree files
1382 1369
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1370 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts 1371 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif 1372 endif
1386 1373
1387 ifneq ($(dtstree),) 1374 ifneq ($(dtstree),)
1388 1375
1389 %.dtb: dtbs_prepare 1376 %.dtb: dtbs_prepare
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1377 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1391 1378
1392 %.dtbo: dtbs_prepare 1379 %.dtbo: dtbs_prepare
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1380 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394 1381
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ 1382 PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
1396 dtbs: dtbs_prepare 1383 dtbs: dtbs_prepare
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1384 $(Q)$(MAKE) $(build)=$(dtstree)
1398 1385
1399 # include/config/kernel.release is actually n 1386 # include/config/kernel.release is actually needed when installing DTBs because
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) 1387 # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
1401 # dtbs_install depend on it as dtbs_install m 1388 # dtbs_install depend on it as dtbs_install may run as root.
1402 dtbs_prepare: include/config/kernel.release s 1389 dtbs_prepare: include/config/kernel.release scripts_dtc
1403 1390
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1391 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1405 export CHECK_DTBS=y 1392 export CHECK_DTBS=y
1406 endif !! 1393 dtbs: dt_binding_check
1407 <<
1408 ifneq ($(CHECK_DTBS),) <<
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif 1394 endif
1411 1395
1412 dtbs_check: dtbs 1396 dtbs_check: dtbs
1413 1397
1414 dtbs_install: 1398 dtbs_install:
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1399 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1416 1400
1417 ifdef CONFIG_OF_EARLY_FLATTREE 1401 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs 1402 all: dtbs
1419 endif 1403 endif
1420 1404
1421 endif 1405 endif
1422 1406
1423 PHONY += scripts_dtc 1407 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic 1408 scripts_dtc: scripts_basic
1425 $(Q)$(MAKE) $(build)=scripts/dtc 1409 $(Q)$(MAKE) $(build)=scripts/dtc
1426 1410
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO 1411 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1428 export CHECK_DTBS=y !! 1412 export CHECK_DT_BINDING=y
1429 endif 1413 endif
1430 1414
1431 PHONY += dt_binding_check dt_binding_schemas !! 1415 PHONY += dt_binding_check
1432 dt_binding_check: dt_binding_schemas scripts_ !! 1416 dt_binding_check: scripts_dtc
1433 $(Q)$(MAKE) $(build)=Documentation/de <<
1434 <<
1435 dt_binding_schemas: <<
1436 $(Q)$(MAKE) $(build)=Documentation/de 1417 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437 1418
1438 PHONY += dt_compatible_check <<
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 <<
1442 # ------------------------------------------- 1419 # ---------------------------------------------------------------------------
1443 # Modules 1420 # Modules
1444 1421
1445 ifdef CONFIG_MODULES 1422 ifdef CONFIG_MODULES
1446 1423
1447 # By default, build modules as well 1424 # By default, build modules as well
1448 1425
1449 all: modules 1426 all: modules
1450 1427
1451 # When we're building modules with modversion 1428 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as 1429 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo 1430 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS 1431 ifdef CONFIG_MODVERSIONS
1455 KBUILD_BUILTIN := 1 1432 KBUILD_BUILTIN := 1
1456 endif 1433 endif
1457 1434
1458 # Build modules 1435 # Build modules
1459 # 1436 #
>> 1437 # A module can be listed more than once in obj-m resulting in
>> 1438 # duplicate lines in modules.order files. Those are removed
>> 1439 # using awk while concatenating to the final file.
1460 1440
1461 # *.ko are usually independent of vmlinux, bu !! 1441 PHONY += modules
1462 # is an exception. !! 1442 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES <<
1464 KBUILD_BUILTIN := 1 <<
1465 modules: vmlinux <<
1466 endif <<
1467 1443
1468 modules: modules_prepare !! 1444 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
>> 1445
>> 1446 modules.order: $(subdir-modorder) FORCE
>> 1447 $(call if_changed,modules_order)
>> 1448
>> 1449 targets += modules.order
1469 1450
1470 # Target to prepare building external modules 1451 # Target to prepare building external modules
>> 1452 PHONY += modules_prepare
1471 modules_prepare: prepare 1453 modules_prepare: prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ 1454 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1473 1455
>> 1456 export modules_sign_only :=
>> 1457
>> 1458 ifeq ($(CONFIG_MODULE_SIG),y)
>> 1459 PHONY += modules_sign
>> 1460 modules_sign: modules_install
>> 1461 @:
>> 1462
>> 1463 # modules_sign is a subset of modules_install.
>> 1464 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
>> 1465 ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1466 modules_sign_only := y
>> 1467 endif
>> 1468 endif
>> 1469
>> 1470 modinst_pre :=
>> 1471 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1472 modinst_pre := __modinst_pre
>> 1473 endif
>> 1474
>> 1475 modules_install: $(modinst_pre)
>> 1476 PHONY += __modinst_pre
>> 1477 __modinst_pre:
>> 1478 @rm -rf $(MODLIB)/kernel
>> 1479 @rm -f $(MODLIB)/source
>> 1480 @mkdir -p $(MODLIB)/kernel
>> 1481 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1482 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1483 rm -f $(MODLIB)/build ; \
>> 1484 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1485 fi
>> 1486 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
>> 1487 @cp -f modules.builtin $(MODLIB)/
>> 1488 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
>> 1489
1474 endif # CONFIG_MODULES 1490 endif # CONFIG_MODULES
1475 1491
1476 ### 1492 ###
1477 # Cleaning is done on three levels. 1493 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1494 # make clean Delete most generated files
1479 # Leave enough to build extern 1495 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1496 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1497 # make distclean Remove editor backup files, patch leftover files and the like
1482 1498
1483 # Directories & files removed with 'make clea 1499 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1500 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
1485 modules.builtin modules.builti 1501 modules.builtin modules.builtin.modinfo modules.nsdeps \
1486 compile_commands.json rust/tes !! 1502 compile_commands.json .thinlto-cache
1487 rust-project.json .vmlinux.obj <<
1488 1503
1489 # Directories & files removed with 'make mrpr 1504 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene 1505 MRPROPER_FILES += include/config include/generated \
1491 arch/$(SRCARCH)/include/gen 1506 arch/$(SRCARCH)/include/generated .objdiff \
1492 debian snap tar-install PKG !! 1507 debian snap tar-install \
1493 .config .config.old .versio 1508 .config .config.old .version \
1494 Module.symvers \ 1509 Module.symvers \
1495 certs/signing_key.pem \ 1510 certs/signing_key.pem \
1496 certs/x509.genkey \ 1511 certs/x509.genkey \
1497 vmlinux-gdb.py \ 1512 vmlinux-gdb.py \
1498 rpmbuild \ !! 1513 *.spec
1499 rust/libmacros.so <<
1500 1514
1501 # clean - Delete most, but leave enough to bu 1515 # clean - Delete most, but leave enough to build external modules
1502 # 1516 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1517 clean: rm-files := $(CLEAN_FILES)
1504 1518
1505 PHONY += archclean vmlinuxclean 1519 PHONY += archclean vmlinuxclean
1506 1520
1507 vmlinuxclean: 1521 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1522 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1523 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1524
1511 clean: archclean vmlinuxclean resolve_btfids_ 1525 clean: archclean vmlinuxclean resolve_btfids_clean
1512 1526
1513 # mrproper - Delete all generated files, incl 1527 # mrproper - Delete all generated files, including .config
1514 # 1528 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1529 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs := $(addprefix _mrproper_, 1530 mrproper-dirs := $(addprefix _mrproper_,scripts)
1517 1531
1518 PHONY += $(mrproper-dirs) mrproper 1532 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs): 1533 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1534 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1535
1522 mrproper: clean $(mrproper-dirs) 1536 mrproper: clean $(mrproper-dirs)
1523 $(call cmd,rmfiles) 1537 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 1538
1528 # distclean 1539 # distclean
1529 # 1540 #
1530 PHONY += distclean 1541 PHONY += distclean
1531 1542
1532 distclean: mrproper 1543 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ 1544 @find . $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1545 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* 1546 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536 -o -name 'core' -o -name tags 1547 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1537 -o -name GPATH -o -name GRTAG 1548 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
1538 -type f -print | xargs rm -f 1549 -type f -print | xargs rm -f
1539 1550
1540 1551
1541 # Packaging of the kernel to various formats 1552 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1553 # ---------------------------------------------------------------------------
1543 1554
1544 %src-pkg: FORCE 1555 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1556 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1546 %pkg: include/config/kernel.release FORCE 1557 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1558 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1548 1559
1549 # Brief documentation of the typical targets 1560 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1561 # ---------------------------------------------------------------------------
1551 1562
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1563 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1564 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1565 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1566 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1567
1557 PHONY += help 1568 PHONY += help
1558 help: 1569 help:
1559 @echo 'Cleaning targets:' 1570 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1571 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1572 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1573 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1574 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1575 @echo ''
>> 1576 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1577 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1578 @echo ''
1567 @echo 'Other generic targets:' 1579 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1580 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1581 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1582 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1583 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 1584 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1585 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1586 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1587 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1588 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1589 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1590 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1591 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1592 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1593 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1594 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1595 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1596 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1597 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1598 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1599 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1600 echo ''
1590 @echo 'Static analysers:' 1601 @echo 'Static analysers:'
1591 @echo ' checkstack - Generate !! 1602 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st <<
1593 @echo ' versioncheck - Sanity ch 1603 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1604 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1605 @echo ' export_report - List the usages of all exported symbols'
1596 @echo ' headerdep - Detect in 1606 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit 1607 @echo ' coccicheck - Check with Coccinelle'
1598 @echo ' clang-analyzer - Check wit 1608 @echo ' clang-analyzer - Check with clang static analyzer'
1599 @echo ' clang-tidy - Check wit 1609 @echo ' clang-tidy - Check with clang-tidy'
1600 @echo '' 1610 @echo ''
1601 @echo 'Tools:' 1611 @echo 'Tools:'
1602 @echo ' nsdeps - Generate 1612 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1603 @echo '' 1613 @echo ''
1604 @echo 'Kernel selftest:' 1614 @echo 'Kernel selftest:'
1605 @echo ' kselftest - Build a 1615 @echo ' kselftest - Build and run kernel selftest'
1606 @echo ' Build, 1616 @echo ' Build, install, and boot kernel before'
1607 @echo ' running 1617 @echo ' running kselftest on it'
1608 @echo ' Run as 1618 @echo ' Run as root for full coverage'
1609 @echo ' kselftest-all - Build k 1619 @echo ' kselftest-all - Build kernel selftest'
1610 @echo ' kselftest-install - Build a 1620 @echo ' kselftest-install - Build and install kernel selftest'
1611 @echo ' kselftest-clean - Remove 1621 @echo ' kselftest-clean - Remove all generated kselftest files'
1612 @echo ' kselftest-merge - Merge a 1622 @echo ' kselftest-merge - Merge all the config dependencies of'
1613 @echo ' kselfte 1623 @echo ' kselftest to existing .config.'
1614 @echo '' 1624 @echo ''
1615 @echo 'Rust targets:' <<
1616 @echo ' rustavailable - Checks wh <<
1617 @echo ' available <<
1618 @echo ' rustfmt - Reformat <<
1619 @echo ' rustfmtcheck - Checks if <<
1620 @echo ' is format <<
1621 @echo ' rustdoc - Generate <<
1622 @echo ' (requires <<
1623 @echo ' rusttest - Runs the <<
1624 @echo ' (requires <<
1625 @echo ' rust-analyzer - Generate <<
1626 @echo ' (requires <<
1627 @echo ' dir/file.[os] - Build spe <<
1628 @echo ' dir/file.rsi - Build mac <<
1629 @echo ' Run with <<
1630 @echo ' The outpu <<
1631 @echo ' dir/file.ll - Build the <<
1632 @echo '' <<
1633 @$(if $(dtstree), \ 1625 @$(if $(dtstree), \
1634 echo 'Devicetree:'; \ 1626 echo 'Devicetree:'; \
1635 echo '* dtbs - !! 1627 echo '* dtbs - Build device tree blobs for enabled boards'; \
1636 echo ' dtbs_install - !! 1628 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637 echo ' dt_binding_check - !! 1629 echo ' dt_binding_check - Validate device tree binding documents'; \
1638 echo ' dt_binding_schema - !! 1630 echo ' dtbs_check - Validate device tree source files';\
1639 echo ' dtbs_check - <<
1640 echo '') 1631 echo '')
1641 1632
1642 @echo 'Userspace tools targets:' 1633 @echo 'Userspace tools targets:'
1643 @echo ' use "make tools/help"' 1634 @echo ' use "make tools/help"'
1644 @echo ' or "cd tools; make help"' 1635 @echo ' or "cd tools; make help"'
1645 @echo '' 1636 @echo ''
1646 @echo 'Kernel packaging:' 1637 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi 1638 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1648 @echo '' 1639 @echo ''
1649 @echo 'Documentation targets:' 1640 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ 1641 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651 @echo '' 1642 @echo ''
1652 @echo 'Architecture-specific targets !! 1643 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ 1644 @$(or $(archhelp),\
1654 echo ' No architecture-speci !! 1645 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1646 @echo ''
1656 @$(if $(boards), \ 1647 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1648 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % 1649 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1650 echo '')
1660 @$(if $(board-dirs), \ 1651 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1652 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1653 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1654 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1655 echo '')
1665 1656
1666 @echo ' make V=n [targets] 1: ver !! 1657 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667 @echo ' 2: giv !! 1658 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 1659 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check 1660 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1671 @echo ' (spars 1661 @echo ' (sparse by default)'
1672 @echo ' make C=2 [targets] Force 1662 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1663 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1664 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1665 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1666 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1667 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a 1668 @echo ' e: warnings are being treated as errors'
1680 @echo ' Multiple leve 1669 @echo ' Multiple levels can be combined with W=12 or W=123'
1681 @$(if $(dtstree), \ <<
1682 echo ' make CHECK_DTBS=1 [ta <<
1683 echo ' This can be ap <<
1684 ) <<
1685 @echo '' 1670 @echo ''
1686 @echo 'Execute "make" or "make all" 1671 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1672 @echo 'For further info see the ./README file'
1688 1673
1689 1674
1690 help-board-dirs := $(addprefix help-,$(board- 1675 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1676
1692 help-boards: $(help-board-dirs) 1677 help-boards: $(help-board-dirs)
1693 1678
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1679 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1680
1696 $(help-board-dirs): help-%: 1681 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1682 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1683 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1684 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1685 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1686 echo '')
1702 1687
1703 1688
1704 # Documentation targets 1689 # Documentation targets
1705 # ------------------------------------------- 1690 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1691 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707 linkcheckdocs dochelp refcheck !! 1692 linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS) 1693 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): 1694 $(DOC_TARGETS):
1710 $(Q)$(MAKE) $(build)=Documentation $@ 1695 $(Q)$(MAKE) $(build)=Documentation $@
1711 1696
1712 <<
1713 # Rust targets <<
1714 # ------------------------------------------- <<
1715 <<
1716 # "Is Rust available?" target <<
1717 PHONY += rustavailable <<
1718 rustavailable: <<
1719 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1720 <<
1721 # Documentation target <<
1722 # <<
1723 # Using the singular to avoid running afoul o <<
1724 PHONY += rustdoc <<
1725 rustdoc: prepare <<
1726 $(Q)$(MAKE) $(build)=rust $@ <<
1727 <<
1728 # Testing target <<
1729 PHONY += rusttest <<
1730 rusttest: prepare <<
1731 $(Q)$(MAKE) $(build)=rust $@ <<
1732 <<
1733 # Formatting targets <<
1734 PHONY += rustfmt rustfmtcheck <<
1735 <<
1736 # We skip `rust/alloc` since we want to minim <<
1737 # <<
1738 # We match using absolute paths since `find` <<
1739 # when matching, which is a problem when e.g. <<
1740 # We `grep` afterwards in order to remove the <<
1741 rustfmt: <<
1742 $(Q)find $(abs_srctree) -type f -name <<
1743 -o -path $(abs_srctree)/rust/ <<
1744 -o -path $(abs_objtree)/rust/ <<
1745 | grep -Fv $(abs_srctree)/rus <<
1746 | grep -Fv $(abs_objtree)/rus <<
1747 | grep -Fv generated \ <<
1748 | xargs $(RUSTFMT) $(rustfmt_ <<
1749 <<
1750 rustfmtcheck: rustfmt_flags = --check <<
1751 rustfmtcheck: rustfmt <<
1752 <<
1753 # Misc 1697 # Misc
1754 # ------------------------------------------- 1698 # ---------------------------------------------------------------------------
1755 1699
1756 PHONY += misc-check <<
1757 misc-check: <<
1758 $(Q)$(srctree)/scripts/misc-check <<
1759 <<
1760 all: misc-check <<
1761 <<
1762 PHONY += scripts_gdb 1700 PHONY += scripts_gdb
1763 scripts_gdb: prepare0 1701 scripts_gdb: prepare0
1764 $(Q)$(MAKE) $(build)=scripts/gdb 1702 $(Q)$(MAKE) $(build)=scripts/gdb
1765 $(Q)ln -fsn $(abspath $(srctree)/scri 1703 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1766 1704
1767 ifdef CONFIG_GDB_SCRIPTS 1705 ifdef CONFIG_GDB_SCRIPTS
1768 all: scripts_gdb 1706 all: scripts_gdb
1769 endif 1707 endif
1770 1708
1771 else # KBUILD_EXTMOD 1709 else # KBUILD_EXTMOD
1772 1710
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### 1711 ###
1776 # External module support. 1712 # External module support.
1777 # When building external modules the kernel u 1713 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1714 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1715 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands 1716 # in the basis kernel ordinary make commands (without M=...) must be used.
1781 1717
1782 # We are always building only modules. 1718 # We are always building only modules.
1783 KBUILD_BUILTIN := 1719 KBUILD_BUILTIN :=
1784 KBUILD_MODULES := 1 1720 KBUILD_MODULES := 1
1785 1721
1786 build-dir := $(KBUILD_EXTMOD) !! 1722 build-dirs := $(KBUILD_EXTMOD)
>> 1723 $(MODORDER): descend
>> 1724 @:
1787 1725
1788 compile_commands.json: $(extmod_prefix)compil 1726 compile_commands.json: $(extmod_prefix)compile_commands.json
1789 PHONY += compile_commands.json 1727 PHONY += compile_commands.json
1790 1728
1791 clean-dirs := $(KBUILD_EXTMOD) 1729 clean-dirs := $(KBUILD_EXTMOD)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1730 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1793 $(KBUILD_EXTMOD)/compile_commands.jso !! 1731 $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
1794 1732
1795 PHONY += prepare 1733 PHONY += prepare
1796 # now expand this into a simple variable to r 1734 # now expand this into a simple variable to reduce the cost of shell evaluations
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT 1735 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
1798 prepare: 1736 prepare:
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF 1737 @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
1800 echo >&2 "warning: the compil 1738 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1801 echo >&2 " The kernel was bu 1739 echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
1802 echo >&2 " You are using: 1740 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
1803 fi 1741 fi
1804 1742
1805 PHONY += help 1743 PHONY += help
1806 help: 1744 help:
1807 @echo ' Building external modules.' 1745 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1746 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1747 @echo ''
1810 @echo ' modules - default t 1748 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1749 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1750 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1751 @echo ''
1815 1752
1816 ifndef CONFIG_MODULES !! 1753 # no-op for external module builds
1817 modules modules_install: __external_modules_e !! 1754 PHONY += modules_prepare
1818 __external_modules_error: <<
1819 @echo >&2 '***' <<
1820 @echo >&2 '*** The present kernel dis <<
1821 @echo >&2 '*** You cannot build or in <<
1822 @echo >&2 '***' <<
1823 @false <<
1824 endif <<
1825 1755
1826 endif # KBUILD_EXTMOD 1756 endif # KBUILD_EXTMOD
1827 1757
1828 # ------------------------------------------- 1758 # ---------------------------------------------------------------------------
1829 # Modules 1759 # Modules
1830 1760
1831 PHONY += modules modules_install modules_sign !! 1761 PHONY += modules modules_install
1832 <<
1833 modules_install: <<
1834 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1835 sign-only=$(if $(filter modules_insta <<
1836 <<
1837 ifeq ($(CONFIG_MODULE_SIG),y) <<
1838 # modules_sign is a subset of modules_install <<
1839 # 'make modules_install modules_sign' is equi <<
1840 modules_sign: modules_install <<
1841 @: <<
1842 else <<
1843 modules_sign: <<
1844 @echo >&2 '***' <<
1845 @echo >&2 '*** CONFIG_MODULE_SIG is d <<
1846 @echo >&2 '***' <<
1847 @false <<
1848 endif <<
1849 1762
1850 ifdef CONFIG_MODULES 1763 ifdef CONFIG_MODULES
1851 1764
1852 $(MODORDER): $(build-dir) !! 1765 modules: modules_check
1853 @: !! 1766 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1854 <<
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t <<
1856 # This is solely useful to speed up test comp <<
1857 modules: modpost <<
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1859 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1860 endif <<
1861 1767
1862 PHONY += modules_check 1768 PHONY += modules_check
1863 modules_check: $(MODORDER) 1769 modules_check: $(MODORDER)
1864 $(Q)$(CONFIG_SHELL) $(srctree)/script 1770 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1865 1771
>> 1772 quiet_cmd_depmod = DEPMOD $(MODLIB)
>> 1773 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1774 $(KERNELRELEASE)
>> 1775
>> 1776 modules_install:
>> 1777 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1778 $(call cmd,depmod)
>> 1779
1866 else # CONFIG_MODULES 1780 else # CONFIG_MODULES
1867 1781
1868 modules: !! 1782 # Modules not configured
1869 @: !! 1783 # ---------------------------------------------------------------------------
1870 1784
1871 KBUILD_MODULES := !! 1785 modules modules_install:
>> 1786 @echo >&2 '***'
>> 1787 @echo >&2 '*** The present kernel configuration has modules disabled.'
>> 1788 @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
>> 1789 @echo >&2 '*** to enable CONFIG_MODULES.'
>> 1790 @echo >&2 '***'
>> 1791 @exit 1
1872 1792
1873 endif # CONFIG_MODULES 1793 endif # CONFIG_MODULES
1874 1794
1875 PHONY += modpost <<
1876 modpost: $(if $(single-build),, $(if $(KBUILD <<
1877 $(if $(KBUILD_MODULES), modules_chec <<
1878 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1879 <<
1880 # Single targets 1795 # Single targets
1881 # ------------------------------------------- 1796 # ---------------------------------------------------------------------------
1882 # To build individual files in subdirectories 1797 # To build individual files in subdirectories, you can do like this:
1883 # 1798 #
1884 # make foo/bar/baz.s 1799 # make foo/bar/baz.s
1885 # 1800 #
1886 # The supported suffixes for single-target ar 1801 # The supported suffixes for single-target are listed in 'single-targets'
1887 # 1802 #
1888 # To build only under specific subdirectories 1803 # To build only under specific subdirectories, you can do like this:
1889 # 1804 #
1890 # make foo/bar/baz/ 1805 # make foo/bar/baz/
1891 1806
1892 ifdef single-build 1807 ifdef single-build
1893 1808
1894 # .ko is special because modpost is needed 1809 # .ko is special because modpost is needed
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG 1810 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1896 single-no-ko := $(filter-out $(single-ko), $( 1811 single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
1897 $(foreach x, o mod, $(patsubs 1812 $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
1898 1813
1899 $(single-ko): single_modules !! 1814 $(single-ko): single_modpost
1900 @: 1815 @:
1901 $(single-no-ko): $(build-dir) !! 1816 $(single-no-ko): descend
1902 @: 1817 @:
1903 1818
1904 # Remove MODORDER when done because it is not !! 1819 ifeq ($(KBUILD_EXTMOD),)
1905 PHONY += single_modules !! 1820 # For the single build of in-tree modules, use a temporary file to avoid
1906 single_modules: $(single-no-ko) modules_prepa !! 1821 # the situation of modules_install installing an invalid modules.order.
1907 $(Q){ $(foreach m, $(single-ko), echo !! 1822 MODORDER := .modules.tmp
1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1911 endif 1823 endif
1912 $(Q)rm -f $(MODORDER) <<
1913 1824
1914 single-goals := $(addprefix $(build-dir)/, $( !! 1825 PHONY += single_modpost
>> 1826 single_modpost: $(single-no-ko) modules_prepare
>> 1827 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
>> 1828 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1915 1829
1916 KBUILD_MODULES := 1 1830 KBUILD_MODULES := 1
1917 1831
>> 1832 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
>> 1833
>> 1834 # trim unrelated directories
>> 1835 build-dirs := $(foreach d, $(build-dirs), \
>> 1836 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
>> 1837
1918 endif 1838 endif
1919 1839
>> 1840 ifndef CONFIG_MODULES
>> 1841 KBUILD_MODULES :=
>> 1842 endif
>> 1843
>> 1844 # Handle descending into subdirectories listed in $(build-dirs)
1920 # Preset locale variables to speed up the bui 1845 # Preset locale variables to speed up the build process. Limit locale
1921 # tweaks to this spot to avoid wrong language 1846 # tweaks to this spot to avoid wrong language settings when running
1922 # make menuconfig etc. 1847 # make menuconfig etc.
1923 # Error messages still appears in the origina 1848 # Error messages still appears in the original language
1924 PHONY += $(build-dir) !! 1849 PHONY += descend $(build-dirs)
1925 $(build-dir): prepare !! 1850 descend: $(build-dirs)
1926 $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1851 $(build-dirs): prepare
>> 1852 $(Q)$(MAKE) $(build)=$@ \
>> 1853 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
>> 1854 need-builtin=1 need-modorder=1
1927 1855
1928 clean-dirs := $(addprefix _clean_, $(clean-di 1856 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1929 PHONY += $(clean-dirs) clean 1857 PHONY += $(clean-dirs) clean
1930 $(clean-dirs): 1858 $(clean-dirs):
1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea 1859 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1932 1860
1933 clean: $(clean-dirs) 1861 clean: $(clean-dirs)
1934 $(call cmd,rmfiles) 1862 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS 1863 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name !! 1864 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ 1865 -o -name '*.ko.*' \
1938 -o -name '*.dtb' -o -name '*. !! 1866 -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1939 -o -name '*.dtb.S' -o -name ' <<
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. 1867 -o -name '*.dwo' -o -name '*.lst' \
1942 -o -name '*.su' -o -name '*.m !! 1868 -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \
1943 -o -name '.*.d' -o -name '.*. 1869 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' 1870 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945 -o -name '*.asn1.[ch]' \ 1871 -o -name '*.asn1.[ch]' \
1946 -o -name '*.symtypes' -o -nam 1872 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1873 -o -name '.tmp_*' \
1947 -o -name '*.c.[012]*.*' \ 1874 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 1875 -o -name '*.ll' \
1949 -o -name '*.gcno' \ 1876 -o -name '*.gcno' \
1950 -o -name '*.*.symversions' \) !! 1877 -o -name '*.*.symversions' \) -type f -print | xargs rm -f
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 1878
1954 # Generate tags for editors 1879 # Generate tags for editors
1955 # ------------------------------------------- 1880 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 1881 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t 1882 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1958 1883
1959 tags TAGS cscope gtags: FORCE 1884 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 1885 $(call cmd,tags)
1961 1886
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1968 $(Q)$(MAKE) $(build)=rust $@ <<
1969 <<
1970 # Script to generate missing namespace depend 1887 # Script to generate missing namespace dependencies
1971 # ------------------------------------------- 1888 # ---------------------------------------------------------------------------
1972 1889
1973 PHONY += nsdeps 1890 PHONY += nsdeps
1974 nsdeps: export KBUILD_NSDEPS=1 1891 nsdeps: export KBUILD_NSDEPS=1
1975 nsdeps: modules 1892 nsdeps: modules
1976 $(Q)$(CONFIG_SHELL) $(srctree)/script 1893 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1977 1894
1978 # Clang Tooling 1895 # Clang Tooling
1979 # ------------------------------------------- 1896 # ---------------------------------------------------------------------------
1980 1897
1981 quiet_cmd_gen_compile_commands = GEN $@ 1898 quiet_cmd_gen_compile_commands = GEN $@
1982 cmd_gen_compile_commands = $(PYTHON3) $ 1899 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1983 1900
1984 $(extmod_prefix)compile_commands.json: $(srct !! 1901 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1985 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K !! 1902 $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
1986 $(if $(CONFIG_MODULES), $(MODORDER)) 1903 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1987 $(call if_changed,gen_compile_command 1904 $(call if_changed,gen_compile_commands)
1988 1905
1989 targets += $(extmod_prefix)compile_commands.j 1906 targets += $(extmod_prefix)compile_commands.json
1990 1907
1991 PHONY += clang-tidy clang-analyzer 1908 PHONY += clang-tidy clang-analyzer
1992 1909
1993 ifdef CONFIG_CC_IS_CLANG 1910 ifdef CONFIG_CC_IS_CLANG
1994 quiet_cmd_clang_tools = CHECK $< 1911 quiet_cmd_clang_tools = CHECK $<
1995 cmd_clang_tools = $(PYTHON3) $(srctree) 1912 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1996 1913
1997 clang-tidy clang-analyzer: $(extmod_prefix)co 1914 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
1998 $(call cmd,clang_tools) 1915 $(call cmd,clang_tools)
1999 else 1916 else
2000 clang-tidy clang-analyzer: 1917 clang-tidy clang-analyzer:
2001 @echo "$@ requires CC=clang" >&2 1918 @echo "$@ requires CC=clang" >&2
2002 @false 1919 @false
2003 endif 1920 endif
2004 1921
2005 # Scripts to check various things for consist 1922 # Scripts to check various things for consistency
2006 # ------------------------------------------- 1923 # ---------------------------------------------------------------------------
2007 1924
2008 PHONY += includecheck versioncheck coccicheck 1925 PHONY += includecheck versioncheck coccicheck export_report
2009 1926
2010 includecheck: 1927 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1928 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 1929 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 1930 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 1931
2015 versioncheck: 1932 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1933 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 1934 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 1935 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 1936
2020 coccicheck: 1937 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ 1938 $(Q)$(BASH) $(srctree)/scripts/$@
2022 1939
2023 export_report: 1940 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 1941 $(PERL) $(srctree)/scripts/export_report.pl
2025 1942
2026 PHONY += checkstack kernelrelease kernelversi 1943 PHONY += checkstack kernelrelease kernelversion image_name
2027 1944
2028 # UML needs a little special treatment here. 1945 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 1946 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 1947 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 1948 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 1949 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 1950 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 1951 else
2035 CHECKSTACK_ARCH := $(ARCH) 1952 CHECKSTACK_ARCH := $(ARCH)
2036 endif 1953 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 1954 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 1955 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 1956 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 1957
2042 kernelrelease: 1958 kernelrelease:
2043 @$(filechk_kernel.release) !! 1959 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044 1960
2045 kernelversion: 1961 kernelversion:
2046 @echo $(KERNELVERSION) 1962 @echo $(KERNELVERSION)
2047 1963
2048 image_name: 1964 image_name:
2049 @echo $(KBUILD_IMAGE) 1965 @echo $(KBUILD_IMAGE)
2050 <<
2051 PHONY += run-command <<
2052 run-command: <<
2053 $(Q)$(KBUILD_RUN_COMMAND) <<
2054 1966
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1967 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) 1968 cmd_rmfiles = rm -rf $(rm-files)
2057 1969
2058 # read saved command lines for existing targe 1970 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe 1971 existing-targets := $(wildcard $(sort $(targets)))
2060 1972
2061 -include $(foreach f,$(existing-targets),$(di 1973 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062 1974
2063 endif # config-build 1975 endif # config-build
2064 endif # mixed-build 1976 endif # mixed-build
2065 endif # need-sub-make 1977 endif # need-sub-make
2066 1978
2067 PHONY += FORCE 1979 PHONY += FORCE
2068 FORCE: 1980 FORCE:
2069 1981
2070 # Declare the contents of the PHONY variable 1982 # Declare the contents of the PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 1983 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 1984 .PHONY: $(PHONY)
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