1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 !! 2 VERSION = 5
3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 15
4 SUBLEVEL = 5 !! 4 SUBLEVEL = 169
5 EXTRAVERSION = 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Trick or Treat
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 # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
>> 97
>> 98 ifeq ($(filter 3.%,$(MAKE_VERSION)),)
>> 99 silence:=$(findstring s,$(firstword -$(MAKEFLAGS)))
>> 100 else
>> 101 silence:=$(findstring s,$(filter-out --%,$(MAKEFLAGS)))
>> 102 endif
>> 103
>> 104 ifeq ($(silence),s)
97 quiet=silent_ 105 quiet=silent_
98 override KBUILD_VERBOSE := !! 106 KBUILD_VERBOSE = 0
99 endif 107 endif
100 108
101 export quiet Q KBUILD_VERBOSE 109 export quiet Q KBUILD_VERBOSE
102 110
103 # Call a source code checker (by default, "spa 111 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation. 112 # C compilation.
105 # 113 #
106 # Use 'make C=1' to enable checking of only re 114 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s 115 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not. 116 # of whether they are re-compiled or not.
109 # 117 #
110 # See the file "Documentation/dev-tools/sparse 118 # See the file "Documentation/dev-tools/sparse.rst" for more details,
111 # including where to get the "sparse" utility. 119 # including where to get the "sparse" utility.
112 120
113 ifeq ("$(origin C)", "command line") 121 ifeq ("$(origin C)", "command line")
114 KBUILD_CHECKSRC = $(C) 122 KBUILD_CHECKSRC = $(C)
115 endif 123 endif
116 ifndef KBUILD_CHECKSRC 124 ifndef KBUILD_CHECKSRC
117 KBUILD_CHECKSRC = 0 125 KBUILD_CHECKSRC = 0
118 endif 126 endif
119 127
120 export KBUILD_CHECKSRC 128 export KBUILD_CHECKSRC
121 129
122 # Enable "clippy" (a linter) as part of the Ru <<
123 # <<
124 # Use 'make CLIPPY=1' to enable it. <<
125 ifeq ("$(origin CLIPPY)", "command line") <<
126 KBUILD_CLIPPY := $(CLIPPY) <<
127 endif <<
128 <<
129 export KBUILD_CLIPPY <<
130 <<
131 # Use make M=dir or set the environment variab 130 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
132 # directory of external module to build. Setti 131 # directory of external module to build. Setting M= takes precedence.
133 ifeq ("$(origin M)", "command line") 132 ifeq ("$(origin M)", "command line")
134 KBUILD_EXTMOD := $(M) 133 KBUILD_EXTMOD := $(M)
135 endif 134 endif
136 135
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ 136 $(if $(word 2, $(KBUILD_EXTMOD)), \
138 $(error building multiple external mod 137 $(error building multiple external modules is not supported))
139 138
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI <<
141 $(error module directory path cannot c <<
142 <<
143 # Remove trailing slashes 139 # Remove trailing slashes
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 140 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM 141 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
146 endif 142 endif
147 143
148 export KBUILD_EXTMOD 144 export KBUILD_EXTMOD
149 145
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif <<
156 <<
157 export KBUILD_EXTRA_WARN <<
158 <<
159 # Kbuild will save output files in the current 146 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t 147 # This does not need to match to the root of the kernel source tree.
161 # 148 #
162 # For example, you can do this: 149 # For example, you can do this:
163 # 150 #
164 # cd /dir/to/store/output/files; make -f /dir 151 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 # 152 #
166 # If you want to save output files in a differ 153 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it. 154 # two syntaxes to specify it.
168 # 155 #
169 # 1) O= 156 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 157 # Use "make O=dir/to/store/output/files/"
171 # 158 #
172 # 2) Set KBUILD_OUTPUT 159 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t 160 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil 161 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 # 162 #
176 # The O= assignment takes precedence over the 163 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 164 # variable.
178 165
179 # Do we want to change the working directory? 166 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line") 167 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 168 KBUILD_OUTPUT := $(O)
182 endif 169 endif
183 170
184 ifneq ($(KBUILD_OUTPUT),) 171 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does !! 172 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 173 # expand a shell special character '~'. We use a somewhat tedious way here.
>> 174 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
>> 175 $(if $(abs_objtree),, \
>> 176 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
>> 177
187 # $(realpath ...) resolves symlinks 178 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 179 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create !! 180 else
>> 181 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),) 182 endif # ifneq ($(KBUILD_OUTPUT),)
191 183
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 184 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 185 # Suppress "Entering directory ..." unless we are changing the work directory.
>> 186 MAKEFLAGS += --no-print-directory
>> 187 else
>> 188 need-sub-make := 1
194 endif 189 endif
195 190
196 export sub_make_done := 1 !! 191 this-makefile := $(lastword $(MAKEFILE_LIST))
>> 192 abs_srctree := $(realpath $(dir $(this-makefile)))
197 193
198 endif # sub_make_done !! 194 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
>> 195 $(error source directory cannot contain spaces or colons)
>> 196 endif
199 197
200 ifeq ($(abs_objtree),$(CURDIR)) !! 198 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are !! 199 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory !! 200 #
203 else !! 201 # --included-dir is added for backward compatibility, but you should not rely on
204 # Recursion to show "Entering directory ..." !! 202 # it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
205 need-sub-make := 1 !! 203 MAKEFLAGS += --include-dir=$(abs_srctree)
206 endif 204 endif
207 205
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 206 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 207 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 208 # 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 := 1 209 need-sub-make := 1
>> 210 # Cancel implicit rules for this Makefile.
>> 211 $(this-makefile): ;
213 endif 212 endif
214 213
>> 214 export abs_srctree abs_objtree
>> 215 export sub_make_done := 1
>> 216
215 ifeq ($(need-sub-make),1) 217 ifeq ($(need-sub-make),1)
216 218
217 PHONY += $(MAKECMDGOALS) __sub-make 219 PHONY += $(MAKECMDGOALS) __sub-make
218 220
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) 221 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220 @: 222 @:
221 223
222 # Invoke a second make in the output directory 224 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: 225 __sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 226 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225 -f $(abs_srctree)/Makefile $(MAKECMDGO <<
226 227
227 else # need-sub-make !! 228 endif # need-sub-make
>> 229 endif # sub_make_done
228 230
229 # We process the rest of the Makefile if this 231 # We process the rest of the Makefile if this is the final invocation of make
>> 232 ifeq ($(need-sub-make),)
>> 233
>> 234 # Do not print "Entering directory ...",
>> 235 # but we want to display it when entering to the output directory
>> 236 # so that IDEs/editors are able to understand relative filenames.
>> 237 MAKEFLAGS += --no-print-directory
230 238
231 ifeq ($(abs_srctree),$(abs_objtree)) 239 ifeq ($(abs_srctree),$(abs_objtree))
232 # building in the source tree 240 # building in the source tree
233 srctree := . 241 srctree := .
234 building_out_of_srctree := 242 building_out_of_srctree :=
235 else 243 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 244 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237 # building in a subdirectory o 245 # building in a subdirectory of the source tree
238 srctree := .. 246 srctree := ..
239 else 247 else
240 srctree := $(abs_srctree) 248 srctree := $(abs_srctree)
241 endif 249 endif
242 building_out_of_srctree := 1 250 building_out_of_srctree := 1
243 endif 251 endif
244 252
245 ifneq ($(KBUILD_ABS_SRCTREE),) 253 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree) 254 srctree := $(abs_srctree)
247 endif 255 endif
248 256
249 objtree := . 257 objtree := .
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 258 VPATH := $(srctree)
256 endif <<
257 endif <<
258 259
259 export building_out_of_srctree srctree objtree 260 export building_out_of_srctree srctree objtree VPATH
260 261
261 # To make sure we do not include .config for a 262 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 263 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 264 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 265 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 266 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 267 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 268 # of make so .config is not included in this case either (for *config).
268 269
269 version_h := include/generated/uapi/linux/vers 270 version_h := include/generated/uapi/linux/version.h
270 271
271 clean-targets := %clean mrproper cleandocs 272 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 273 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 274 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers 275 $(version_h) headers headers_% archheaders archscripts \
275 %asm-generic kernelve 276 %asm-generic kernelversion %src-pkg dt_binding_check \
276 outputmakefile rustav !! 277 outputmakefile
277 no-sync-config-targets := $(no-dot-config-targ !! 278 # Installation targets should not require compiler. Unfortunately, vdso_install
>> 279 # is an exception where build artifacts may be updated. This must be fixed.
>> 280 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
>> 281 headers_install modules_install kernelrelease image_name
>> 282 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
278 image_name 283 image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 284 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
280 285
281 config-build := 286 config-build :=
282 mixed-build := 287 mixed-build :=
283 need-config := 1 288 need-config := 1
>> 289 need-compiler := 1
284 may-sync-config := 1 290 may-sync-config := 1
285 single-build := 291 single-build :=
286 292
287 ifneq ($(filter $(no-dot-config-targets), $(MA 293 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 294 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 295 need-config :=
290 endif !! 296 endif
291 endif 297 endif
292 298
293 ifneq ($(filter $(no-sync-config-targets), $(M !! 299 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 300 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 301 need-compiler :=
296 endif !! 302 endif
297 endif 303 endif
298 304
299 need-compiler := $(may-sync-config) !! 305 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 306 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 307 may-sync-config :=
>> 308 endif
>> 309 endif
300 310
301 ifneq ($(KBUILD_EXTMOD),) 311 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 312 may-sync-config :=
303 endif 313 endif
304 314
305 ifeq ($(KBUILD_EXTMOD),) 315 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 316 ifneq ($(filter %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 317 config-build := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 318 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 319 mixed-build := 1
>> 320 endif
310 endif 321 endif
311 endif <<
312 endif 322 endif
313 323
314 # We cannot build single targets and the other 324 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO 325 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 single-build := 1 !! 326 single-build := 1
317 ifneq ($(filter-out $(single-targets), $(M !! 327 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318 mixed-build := 1 !! 328 mixed-build := 1
319 endif !! 329 endif
320 endif 330 endif
321 331
322 # For "make -j clean all", "make -j mrproper d 332 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 333 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 334 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 335 mixed-build := 1
326 endif !! 336 endif
327 endif 337 endif
328 338
329 # install and modules_install need also be pro 339 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 340 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 341 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 342 mixed-build := 1
333 endif !! 343 endif
334 endif 344 endif
335 345
336 ifdef mixed-build 346 ifdef mixed-build
337 # ============================================ 347 # ===========================================================================
338 # We're called with mixed targets (*config and 348 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 349 # Handle them one by one.
340 350
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 351 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 352
343 $(MAKECMDGOALS): __build_one_by_one 353 $(MAKECMDGOALS): __build_one_by_one
344 @: 354 @:
345 355
346 __build_one_by_one: 356 __build_one_by_one:
347 $(Q)set -e; \ 357 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 358 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 359 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 360 done
351 361
352 else # !mixed-build 362 else # !mixed-build
353 363
354 include $(srctree)/scripts/Kbuild.include 364 include $(srctree)/scripts/Kbuild.include
355 365
356 # Read KERNELRELEASE from include/config/kerne 366 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 367 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 368 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 369 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 370
361 include $(srctree)/scripts/subarch.include 371 include $(srctree)/scripts/subarch.include
362 372
363 # Cross compiling and selecting different set 373 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 374 # ---------------------------------------------------------------------------
365 # 375 #
366 # When performing cross compilation for other 376 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 377 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 378 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 379 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 380 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 381 # The default ARCH is the host where make is executed.
372 382
373 # CROSS_COMPILE specify the prefix used for al 383 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 384 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 385 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 386 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 387 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 388 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 389 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 390 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 391 ARCH ?= $(SUBARCH)
382 392
383 # Architecture as present in compile.h 393 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 394 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 395 SRCARCH := $(ARCH)
386 396
387 # Additional ARCH settings for x86 397 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 398 ifeq ($(ARCH),i386)
389 SRCARCH := x86 399 SRCARCH := x86
390 endif 400 endif
391 ifeq ($(ARCH),x86_64) 401 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 402 SRCARCH := x86
393 endif 403 endif
394 404
395 # Additional ARCH settings for sparc 405 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 406 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 407 SRCARCH := sparc
398 endif 408 endif
399 ifeq ($(ARCH),sparc64) 409 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 410 SRCARCH := sparc
401 endif 411 endif
402 412
403 # Additional ARCH settings for parisc 413 # Additional ARCH settings for parisc
404 ifeq ($(ARCH),parisc64) 414 ifeq ($(ARCH),parisc64)
405 SRCARCH := parisc 415 SRCARCH := parisc
406 endif 416 endif
407 417
408 export cross_compiling := 418 export cross_compiling :=
409 ifneq ($(SRCARCH),$(SUBARCH)) 419 ifneq ($(SRCARCH),$(SUBARCH))
410 cross_compiling := 1 420 cross_compiling := 1
411 endif 421 endif
412 422
413 KCONFIG_CONFIG ?= .config 423 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 424 export KCONFIG_CONFIG
415 425
416 # SHELL used by kbuild 426 # SHELL used by kbuild
417 CONFIG_SHELL := sh 427 CONFIG_SHELL := sh
418 428
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 429 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 430 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 431 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 432
423 ifneq ($(LLVM),) 433 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),) !! 434 HOSTCC = clang
425 LLVM_PREFIX := $(LLVM) !! 435 HOSTCXX = clang++
426 else ifneq ($(filter -%,$(LLVM)),) <<
427 LLVM_SUFFIX := $(LLVM) <<
428 endif <<
429 <<
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) <<
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) <<
432 else 436 else
433 HOSTCC = gcc 437 HOSTCC = gcc
434 HOSTCXX = g++ 438 HOSTCXX = g++
435 endif 439 endif
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config 440 HOSTPKG_CONFIG = pkg-config
438 441
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 442 export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440 -O2 -fomit-frame-poin !! 443 -O2 -fomit-frame-pointer -std=gnu89
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) !! 444 export KBUILD_USERLDFLAGS :=
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) !! 445
443 !! 446 KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
444 # These flags apply to all Rust code in the tr !! 447 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
445 # host programs. <<
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 448 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 449 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 450
471 # Make variables (CC, etc...) 451 # Make variables (CC, etc...)
472 CPP = $(CC) -E 452 CPP = $(CC) -E
473 ifneq ($(LLVM),) 453 ifneq ($(LLVM),)
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU !! 454 CC = clang
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S !! 455 LD = ld.lld
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ !! 456 AR = llvm-ar
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ !! 457 NM = llvm-nm
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( !! 458 OBJCOPY = llvm-objcopy
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( !! 459 OBJDUMP = llvm-objdump
480 READELF = $(LLVM_PREFIX)llvm-readelf$( !! 460 READELF = llvm-readelf
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL !! 461 STRIP = llvm-strip
482 else 462 else
483 CC = $(CROSS_COMPILE)gcc 463 CC = $(CROSS_COMPILE)gcc
484 LD = $(CROSS_COMPILE)ld 464 LD = $(CROSS_COMPILE)ld
485 AR = $(CROSS_COMPILE)ar 465 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 466 NM = $(CROSS_COMPILE)nm
487 OBJCOPY = $(CROSS_COMPILE)objcopy 467 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 468 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf 469 READELF = $(CROSS_COMPILE)readelf
490 STRIP = $(CROSS_COMPILE)strip 470 STRIP = $(CROSS_COMPILE)strip
491 endif 471 endif
492 RUSTC = rustc <<
493 RUSTDOC = rustdoc <<
494 RUSTFMT = rustfmt <<
495 CLIPPY_DRIVER = clippy-driver <<
496 BINDGEN = bindgen <<
497 PAHOLE = pahole 472 PAHOLE = pahole
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve 473 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX = flex 474 LEX = flex
500 YACC = bison 475 YACC = bison
501 AWK = awk 476 AWK = awk
502 INSTALLKERNEL := installkernel 477 INSTALLKERNEL := installkernel
>> 478 DEPMOD = depmod
503 PERL = perl 479 PERL = perl
504 PYTHON3 = python3 480 PYTHON3 = python3
505 CHECK = sparse 481 CHECK = sparse
506 BASH = bash 482 BASH = bash
507 KGZIP = gzip 483 KGZIP = gzip
508 KBZIP2 = bzip2 484 KBZIP2 = bzip2
509 KLZOP = lzop 485 KLZOP = lzop
510 LZMA = lzma 486 LZMA = lzma
511 LZ4 = lz4c 487 LZ4 = lz4c
512 XZ = xz 488 XZ = xz
513 ZSTD = zstd 489 ZSTD = zstd
514 490
>> 491 PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
>> 492
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 493 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 494 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := 495 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE = 496 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 497 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 498 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 499 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 500 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 501 LDFLAGS_vmlinux =
526 502
527 # Use USERINCLUDE when you must reference the 503 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 504 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 505 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 506 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 507 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 508 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li 509 -include $(srctree)/include/linux/compiler-version.h \
534 -include $(srctree)/include/li 510 -include $(srctree)/include/linux/kconfig.h
535 511
536 # Use LINUXINCLUDE when you must reference the 512 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 513 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 514 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 515 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 516 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree 517 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542 -I$(objtree)/include \ 518 -I$(objtree)/include \
543 $(USERINCLUDE) 519 $(USERINCLUDE)
544 520
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 521 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 !! 522 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS := !! 523 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11 !! 524 -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar !! 525 -Werror=return-type -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char !! 526 -std=gnu89
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 527 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ <<
557 -Cpanic=abort -Cembed-bitc <<
558 -Cforce-unwind-tables=n -C <<
559 -Csymbol-mangling-version= <<
560 -Crelocation-model=static <<
561 -Zfunction-sections=n \ <<
562 -Wclippy::float_arithmetic <<
563 <<
564 KBUILD_AFLAGS_KERNEL := 528 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 529 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 530 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 531 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE <<
570 KBUILD_LDFLAGS_MODULE := 532 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS := 533 KBUILD_LDFLAGS :=
572 CLANG_FLAGS := 534 CLANG_FLAGS :=
573 535
574 ifeq ($(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 536 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 537 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ 538 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 539 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 540 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS <<
597 541
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 542 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 543 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF <<
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 544 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 545 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 546 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
>> 547 export PAHOLE_FLAGS
604 548
605 # Files to ignore in find ... statements 549 # Files to ignore in find ... statements
606 550
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 551 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 552 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 553 -prune -o
>> 554 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 555 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 556
611 # ============================================ 557 # ===========================================================================
612 # Rules shared between *config targets and bui 558 # Rules shared between *config targets and build targets
613 559
614 # Basic helpers built in scripts/basic/ 560 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic 561 PHONY += scripts_basic
616 scripts_basic: 562 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 563 $(Q)$(MAKE) $(build)=scripts/basic
618 564
619 PHONY += outputmakefile 565 PHONY += outputmakefile
620 ifdef building_out_of_srctree 566 ifdef building_out_of_srctree
621 # Before starting out-of-tree build, make sure 567 # Before starting out-of-tree build, make sure the source tree is clean.
622 # outputmakefile generates a Makefile in the o 568 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 569 # separate output directory. This allows convenient use of make in the
624 # output directory. 570 # output directory.
625 # At the same time when output Makefile genera 571 # At the same time when output Makefile generated, generate .gitignore to
626 # ignore whole output directory 572 # ignore whole output directory
627 573
628 quiet_cmd_makefile = GEN Makefile 574 quiet_cmd_makefile = GEN Makefile
629 cmd_makefile = { \ 575 cmd_makefile = { \
630 echo "\# Automatically generated by $( 576 echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
631 echo "include $(srctree)/Makefile"; \ 577 echo "include $(srctree)/Makefile"; \
632 } > Makefile 578 } > Makefile
633 579
634 outputmakefile: 580 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ !! 581 $(Q)if [ -f $(srctree)/.config -o \
636 -d $(srctree)/include/config 582 -d $(srctree)/include/config -o \
637 -d $(srctree)/arch/$(SRCARCH) 583 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
638 echo >&2 "***"; \ 584 echo >&2 "***"; \
639 echo >&2 "*** The source tree 585 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 586 echo >&2 "*** in $(abs_srctree)";\
641 echo >&2 "***"; \ 587 echo >&2 "***"; \
642 false; \ 588 false; \
643 fi 589 fi
644 $(Q)ln -fsn $(srctree) source 590 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) 591 $(call cmd,makefile)
646 $(Q)test -e .gitignore || \ 592 $(Q)test -e .gitignore || \
647 { echo "# this is build directory, ign 593 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
648 endif 594 endif
649 595
650 # The expansion should be delayed until arch/$ 596 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a 597 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig ( 598 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det 599 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC 600 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
655 601
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), 602 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
657 include $(srctree)/scripts/Makefile.clang 603 include $(srctree)/scripts/Makefile.clang
658 endif 604 endif
659 605
660 # Include this also for config targets because 606 # Include this also for config targets because some architectures need
661 # cc-cross-prefix to determine CROSS_COMPILE. 607 # cc-cross-prefix to determine CROSS_COMPILE.
662 ifdef need-compiler 608 ifdef need-compiler
663 include $(srctree)/scripts/Makefile.compiler 609 include $(srctree)/scripts/Makefile.compiler
664 endif 610 endif
665 611
666 ifdef config-build 612 ifdef config-build
667 # ============================================ 613 # ===========================================================================
668 # *config targets only - make sure prerequisit 614 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 615 # in scripts/kconfig to make the *config target
670 616
671 # Read arch-specific Makefile to set KBUILD_DE !! 617 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 618 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 619 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile 620 include $(srctree)/arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 621 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676 622
677 config: outputmakefile scripts_basic FORCE 623 config: outputmakefile scripts_basic FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 624 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 625
680 %config: outputmakefile scripts_basic FORCE 626 %config: outputmakefile scripts_basic FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 627 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 628
683 else #!config-build 629 else #!config-build
684 # ============================================ 630 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 631 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 632 # targets and others. In general all targets except *config targets.
687 633
688 # If building an external module we do not car 634 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules 635 # but instead __all depend on modules
690 PHONY += all 636 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),) 637 ifeq ($(KBUILD_EXTMOD),)
692 __all: all 638 __all: all
693 else 639 else
694 __all: modules 640 __all: modules
695 endif 641 endif
696 642
697 targets := <<
698 <<
699 # Decide whether to build built-in, modular, o 643 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in. 644 # Normally, just do built-in.
701 645
702 KBUILD_MODULES := 646 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1 647 KBUILD_BUILTIN := 1
704 648
705 # If we have only "make modules", don't compil 649 # If we have only "make modules", don't compile built-in objects.
706 ifeq ($(MAKECMDGOALS),modules) 650 ifeq ($(MAKECMDGOALS),modules)
707 KBUILD_BUILTIN := 651 KBUILD_BUILTIN :=
708 endif 652 endif
709 653
710 # If we have "make <whatever> modules", compil 654 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway. 655 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module 656 # Just "make" or "make all" shall build modules as well
713 657
714 ifneq ($(filter all modules nsdeps %compile_co 658 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 659 KBUILD_MODULES := 1
716 endif 660 endif
717 661
718 ifeq ($(MAKECMDGOALS),) 662 ifeq ($(MAKECMDGOALS),)
719 KBUILD_MODULES := 1 663 KBUILD_MODULES := 1
720 endif 664 endif
721 665
722 export KBUILD_MODULES KBUILD_BUILTIN 666 export KBUILD_MODULES KBUILD_BUILTIN
723 667
724 ifdef need-config 668 ifdef need-config
725 include include/config/auto.conf 669 include include/config/auto.conf
726 endif 670 endif
727 671
728 ifeq ($(KBUILD_EXTMOD),) 672 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs 673 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y := !! 674 core-y := init/ usr/ arch/$(SRCARCH)/
731 drivers-y := !! 675 drivers-y := drivers/ sound/
>> 676 drivers-$(CONFIG_SAMPLES) += samples/
>> 677 drivers-$(CONFIG_NET) += net/
>> 678 drivers-y += virt/
732 libs-y := lib/ 679 libs-y := lib/
733 endif # KBUILD_EXTMOD 680 endif # KBUILD_EXTMOD
734 681
735 # The all: target is the default when no targe 682 # The all: target is the default when no target is given on the
736 # command line. 683 # command line.
737 # This allow a user to issue only 'make' to bu 684 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 685 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 686 all: vmlinux
740 687
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover 688 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
742 ifdef CONFIG_CC_IS_GCC 689 ifdef CONFIG_CC_IS_GCC
743 CFLAGS_GCOV += -fno-tree-loop-im 690 CFLAGS_GCOV += -fno-tree-loop-im
744 endif 691 endif
745 export CFLAGS_GCOV 692 export CFLAGS_GCOV
746 693
747 # The arch Makefiles can override CC_FLAGS_FTR 694 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER 695 ifdef CONFIG_FUNCTION_TRACER
749 CC_FLAGS_FTRACE := -pg 696 CC_FLAGS_FTRACE := -pg
750 endif 697 endif
751 698
>> 699 ifdef CONFIG_CC_IS_GCC
>> 700 RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
>> 701 RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch-cs-prefix)
>> 702 RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
>> 703 endif
>> 704 ifdef CONFIG_CC_IS_CLANG
>> 705 RETPOLINE_CFLAGS := -mretpoline-external-thunk
>> 706 RETPOLINE_VDSO_CFLAGS := -mretpoline
>> 707 endif
>> 708
>> 709 ifdef CONFIG_RETHUNK
>> 710 RETHUNK_CFLAGS := -mfunction-return=thunk-extern
>> 711 RETPOLINE_CFLAGS += $(RETHUNK_CFLAGS)
>> 712 endif
>> 713
>> 714 export RETPOLINE_CFLAGS
>> 715 export RETPOLINE_VDSO_CFLAGS
>> 716
752 include $(srctree)/arch/$(SRCARCH)/Makefile 717 include $(srctree)/arch/$(SRCARCH)/Makefile
753 718
754 ifdef need-config 719 ifdef need-config
755 ifdef may-sync-config 720 ifdef may-sync-config
756 # Read in dependencies to all Kconfig* files, 721 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include 722 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP 723 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd 724 include include/config/auto.conf.cmd
760 725
761 $(KCONFIG_CONFIG): 726 $(KCONFIG_CONFIG):
762 @echo >&2 '***' 727 @echo >&2 '***'
763 @echo >&2 '*** Configuration file "$@" 728 @echo >&2 '*** Configuration file "$@" not found!'
764 @echo >&2 '***' 729 @echo >&2 '***'
765 @echo >&2 '*** Please run some configu 730 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
766 @echo >&2 '*** "make menuconfig" or "m 731 @echo >&2 '*** "make menuconfig" or "make xconfig").'
767 @echo >&2 '***' 732 @echo >&2 '***'
768 @/bin/false 733 @/bin/false
769 734
770 # The actual configuration files used during t 735 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda 736 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con 737 # include/config/auto.conf (which mirrors .config).
773 # 738 #
774 # This exploits the 'multi-target pattern rule 739 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once 740 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b 741 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
777 # 742 #
778 # Do not use $(call cmd,...) here. That would 743 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
779 # so you cannot notice that Kconfig is waiting 744 # so you cannot notice that Kconfig is waiting for the user input.
780 %/config/auto.conf %/config/auto.conf.cmd %/ge !! 745 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
781 $(Q)$(kecho) " SYNC $@" 746 $(Q)$(kecho) " SYNC $@"
782 $(Q)$(MAKE) -f $(srctree)/Makefile syn 747 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config 748 else # !may-sync-config
784 # External modules and some install targets ne 749 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care 750 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test 751 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf 752 PHONY += include/config/auto.conf
788 753
789 include/config/auto.conf: 754 include/config/auto.conf:
790 @test -e include/generated/autoconf.h !! 755 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
791 echo >&2; 756 echo >&2; \
792 echo >&2 " ERROR: Kernel configuratio 757 echo >&2 " ERROR: Kernel configuration is invalid."; \
793 echo >&2 " include/generated/a 758 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
794 echo >&2 " Run 'make oldconfig 759 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
795 echo >&2 ; 760 echo >&2 ; \
796 /bin/false) 761 /bin/false)
797 762
798 endif # may-sync-config 763 endif # may-sync-config
799 endif # need-config 764 endif # need-config
800 765
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch 766 KBUILD_CFLAGS += -fno-delete-null-pointer-checks
>> 767 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 768 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 769 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 770 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
802 771
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 772 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
804 KBUILD_CFLAGS += -O2 773 KBUILD_CFLAGS += -O2
805 KBUILD_RUSTFLAGS += -Copt-level=2 !! 774 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
>> 775 KBUILD_CFLAGS += -O3
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 776 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
807 KBUILD_CFLAGS += -Os 777 KBUILD_CFLAGS += -Os
808 KBUILD_RUSTFLAGS += -Copt-level=s <<
809 endif 778 endif
810 779
811 # Always set `debug-assertions` and `overflow- <<
812 # depends on `opt-level` and `debug-assertions <<
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( <<
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C <<
815 <<
816 # Tell gcc to never replace conditional load w 780 # Tell gcc to never replace conditional load with a non-conditional one
817 ifdef CONFIG_CC_IS_GCC 781 ifdef CONFIG_CC_IS_GCC
818 # gcc-10 renamed --param=allow-store-data-race 782 # gcc-10 renamed --param=allow-store-data-races=0 to
819 # -fno-allow-store-data-races. 783 # -fno-allow-store-data-races.
820 KBUILD_CFLAGS += $(call cc-option,--param=al 784 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 785 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
822 endif 786 endif
823 787
824 ifdef CONFIG_READABLE_ASM 788 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 789 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 790 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 791 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 792 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- 793 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
830 endif 794 endif
831 795
>> 796 ifneq ($(CONFIG_FRAME_WARN),0)
>> 797 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
>> 798 endif
>> 799
832 stackp-flags-y 800 stackp-flags-y := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR) 801 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 802 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
835 803
836 KBUILD_CFLAGS += $(stackp-flags-y) 804 KBUILD_CFLAGS += $(stackp-flags-y)
837 805
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 806 KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 807 KBUILD_CFLAGS += $(KBUILD_CFLAGS-y)
>> 808
>> 809 ifdef CONFIG_CC_IS_CLANG
>> 810 KBUILD_CPPFLAGS += -Qunused-arguments
>> 811 # The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable.
>> 812 KBUILD_CFLAGS += -Wno-gnu
>> 813 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
>> 814 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>> 815 # See modpost pattern 2
>> 816 KBUILD_CFLAGS += -mno-global-merge
>> 817 else
>> 818
>> 819 # Warn about unmarked fall-throughs in switch statement.
>> 820 # Disabled for clang while comment to attribute conversion happens and
>> 821 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
>> 822 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,)
>> 823 # gcc inanely warns about local variables called 'main'
>> 824 KBUILD_CFLAGS += -Wno-main
>> 825 endif
>> 826
>> 827 # These warnings generated too much noise in a regular build.
>> 828 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 829 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
>> 830 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
>> 831
>> 832 # These result in bogus false positives
>> 833 KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
840 834
841 ifdef CONFIG_FRAME_POINTER 835 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 836 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 837 else
845 # Some targets (ARM with Thumb2, for example), 838 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 839 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 840 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 841 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 842 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER 843 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 844 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 845 endif
855 endif 846 endif
856 847
857 # Initialize all stack variables with a 0xAA p 848 # Initialize all stack variables with a 0xAA pattern.
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN 849 ifdef CONFIG_INIT_STACK_ALL_PATTERN
859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 850 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
860 endif 851 endif
861 852
862 # Initialize all stack variables with a zero v 853 # Initialize all stack variables with a zero value.
863 ifdef CONFIG_INIT_STACK_ALL_ZERO 854 ifdef CONFIG_INIT_STACK_ALL_ZERO
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer 855 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 856 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
866 # https://github.com/llvm/llvm-project/issues/ 857 # https://github.com/llvm/llvm-project/issues/44842
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 858 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 859 endif
871 endif 860 endif
872 861
873 # While VLAs have been removed, GCC produces u 862 # While VLAs have been removed, GCC produces unreachable stack probes
874 # for the randomize_kstack_offset feature. Dis 863 # for the randomize_kstack_offset feature. Disable it for all compilers.
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac 864 KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
876 865
877 # Clear used registers at func exit (to reduce 866 # Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
878 ifdef CONFIG_ZERO_CALL_USED_REGS 867 ifdef CONFIG_ZERO_CALL_USED_REGS
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- 868 KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr
880 endif 869 endif
881 870
>> 871 DEBUG_CFLAGS :=
>> 872
>> 873 ifdef CONFIG_DEBUG_INFO
>> 874
>> 875 ifdef CONFIG_DEBUG_INFO_SPLIT
>> 876 DEBUG_CFLAGS += -gsplit-dwarf
>> 877 else
>> 878 DEBUG_CFLAGS += -g
>> 879 endif
>> 880
>> 881 ifdef CONFIG_AS_IS_LLVM
>> 882 KBUILD_AFLAGS += -g
>> 883 else
>> 884 KBUILD_AFLAGS += -Wa,-gdwarf-2
>> 885 endif
>> 886
>> 887 ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
>> 888 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
>> 889 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
>> 890 DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y)
>> 891 KBUILD_AFLAGS += -gdwarf-$(dwarf-version-y)
>> 892 endif
>> 893
>> 894 ifdef CONFIG_DEBUG_INFO_REDUCED
>> 895 DEBUG_CFLAGS += -fno-var-tracking
>> 896 ifdef CONFIG_CC_IS_GCC
>> 897 DEBUG_CFLAGS += -femit-struct-debug-baseonly
>> 898 endif
>> 899 endif
>> 900
>> 901 ifdef CONFIG_DEBUG_INFO_COMPRESSED
>> 902 DEBUG_CFLAGS += -gz=zlib
>> 903 KBUILD_AFLAGS += -gz=zlib
>> 904 KBUILD_LDFLAGS += --compress-debug-sections=zlib
>> 905 endif
>> 906
>> 907 endif # CONFIG_DEBUG_INFO
>> 908
>> 909 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
>> 910 export DEBUG_CFLAGS
>> 911
882 ifdef CONFIG_FUNCTION_TRACER 912 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 913 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
884 CC_FLAGS_FTRACE += -mrecord-mcount 914 CC_FLAGS_FTRACE += -mrecord-mcount
885 ifdef CONFIG_HAVE_NOP_MCOUNT 915 ifdef CONFIG_HAVE_NOP_MCOUNT
886 ifeq ($(call cc-option-yn, -mnop-mcount),y 916 ifeq ($(call cc-option-yn, -mnop-mcount),y)
887 CC_FLAGS_FTRACE += -mnop-mcount 917 CC_FLAGS_FTRACE += -mnop-mcount
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 918 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
889 endif 919 endif
890 endif 920 endif
891 endif 921 endif
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 922 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT !! 923 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU <<
895 endif <<
896 endif 924 endif
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 925 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
898 ifdef CONFIG_HAVE_C_RECORDMCOUNT 926 ifdef CONFIG_HAVE_C_RECORDMCOUNT
899 BUILD_C_RECORDMCOUNT := y 927 BUILD_C_RECORDMCOUNT := y
900 export BUILD_C_RECORDMCOUNT 928 export BUILD_C_RECORDMCOUNT
901 endif 929 endif
902 endif 930 endif
903 ifdef CONFIG_HAVE_FENTRY 931 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr 932 # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
905 ifeq ($(call cc-option-yn, -mfentry),y) 933 ifeq ($(call cc-option-yn, -mfentry),y)
906 CC_FLAGS_FTRACE += -mfentry 934 CC_FLAGS_FTRACE += -mfentry
907 CC_FLAGS_USING += -DCC_USING_FENTRY 935 CC_FLAGS_USING += -DCC_USING_FENTRY
908 endif 936 endif
909 endif 937 endif
910 export CC_FLAGS_FTRACE 938 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 939 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 940 KBUILD_AFLAGS += $(CC_FLAGS_USING)
913 endif 941 endif
914 942
915 # We trigger additional mismatches with less i 943 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 944 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- 945 KBUILD_CFLAGS += -fno-inline-functions-called-once
918 endif 946 endif
919 947
920 # `rustc`'s `-Zfunction-sections` applies to d <<
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 948 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 949 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections 950 LDFLAGS_vmlinux += --gc-sections
925 endif 951 endif
926 952
927 ifdef CONFIG_SHADOW_CALL_STACK 953 ifdef CONFIG_SHADOW_CALL_STACK
928 ifndef CONFIG_DYNAMIC_SCS <<
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac 954 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 955 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
931 endif <<
932 export CC_FLAGS_SCS 956 export CC_FLAGS_SCS
933 endif 957 endif
934 958
935 ifdef CONFIG_LTO_CLANG 959 ifdef CONFIG_LTO_CLANG
936 ifdef CONFIG_LTO_CLANG_THIN 960 ifdef CONFIG_LTO_CLANG_THIN
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 961 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
938 else 962 else
939 CC_FLAGS_LTO := -flto 963 CC_FLAGS_LTO := -flto
940 endif 964 endif
941 CC_FLAGS_LTO += -fvisibility=hidden 965 CC_FLAGS_LTO += -fvisibility=hidden
942 966
943 # Limit inlining across translation units to r 967 # Limit inlining across translation units to reduce binary size
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 968 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
>> 969
>> 970 # Check for frame size exceeding threshold during prolog/epilog insertion
>> 971 # when using lld < 13.0.0.
>> 972 ifneq ($(CONFIG_FRAME_WARN),0)
>> 973 ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
>> 974 KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
>> 975 endif
>> 976 endif
945 endif 977 endif
946 978
947 ifdef CONFIG_LTO 979 ifdef CONFIG_LTO
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 980 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
949 KBUILD_AFLAGS += -fno-lto 981 KBUILD_AFLAGS += -fno-lto
950 export CC_FLAGS_LTO 982 export CC_FLAGS_LTO
951 endif 983 endif
952 984
953 ifdef CONFIG_CFI_CLANG 985 ifdef CONFIG_CFI_CLANG
954 CC_FLAGS_CFI := -fsanitize=kcfi !! 986 CC_FLAGS_CFI := -fsanitize=cfi \
>> 987 -fsanitize-cfi-cross-dso \
>> 988 -fno-sanitize-cfi-canonical-jump-tables \
>> 989 -fno-sanitize-trap=cfi \
>> 990 -fno-sanitize-blacklist
>> 991
>> 992 ifdef CONFIG_CFI_PERMISSIVE
>> 993 CC_FLAGS_CFI += -fsanitize-recover=cfi
>> 994 endif
>> 995
>> 996 # If LTO flags are filtered out, we must also filter out CFI.
>> 997 CC_FLAGS_LTO += $(CC_FLAGS_CFI)
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 998 KBUILD_CFLAGS += $(CC_FLAGS_CFI)
956 export CC_FLAGS_CFI 999 export CC_FLAGS_CFI
957 endif 1000 endif
958 1001
959 # Architectures can define flags to add/remove <<
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN <<
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 <<
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) 1002 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 1003 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT)
972 endif 1004 endif
973 endif <<
974 1005
975 # arch Makefile may override CC so keep this a 1006 # arch Makefile may override CC so keep this after arch Makefile is included
976 NOSTDINC_FLAGS += -nostdinc !! 1007 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
>> 1008
>> 1009 # warn about C99 declaration after statement
>> 1010 KBUILD_CFLAGS += -Wdeclaration-after-statement
>> 1011
>> 1012 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
>> 1013 KBUILD_CFLAGS += -Wvla
>> 1014
>> 1015 # disable pointer signed / unsigned warnings in gcc 4.0
>> 1016 KBUILD_CFLAGS += -Wno-pointer-sign
977 1017
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 1018 # disable stringop warnings in gcc 8+
979 # the kernel uses only C99 flexible arrays for !! 1019 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
980 # arrays. Enforce this for everything that may !! 1020
981 # perform bounds checking. !! 1021 # We'll want to enable this eventually, but it's not going away for 5.7 at least
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl !! 1022 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
983 !! 1023 KBUILD_CFLAGS += -Wno-array-bounds
984 #Currently, disable -Wstringop-overflow for GC !! 1024 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW !! 1025
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + !! 1026 # Another good warning that we'll want to enable eventually
>> 1027 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
>> 1028
>> 1029 # Enabled with W=2, disabled by default as noisy
>> 1030 ifdef CONFIG_CC_IS_GCC
>> 1031 KBUILD_CFLAGS += -Wno-maybe-uninitialized
>> 1032 endif
>> 1033
>> 1034 ifdef CONFIG_CC_IS_GCC
>> 1035 # The allocators already balk at large sizes, so silence the compiler
>> 1036 # warnings for bounds checks involving those possible values. While
>> 1037 # -Wno-alloc-size-larger-than would normally be used here, earlier versions
>> 1038 # of gcc (<9.1) weirdly don't handle the option correctly when _other_
>> 1039 # warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
>> 1040 # doesn't work (as it is documented to), silently resolving to "0" prior to
>> 1041 # version 9.1 (and producing an error more recently). Numeric values larger
>> 1042 # than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
>> 1043 # ignored, continuing to default to PTRDIFF_MAX. So, left with no other
>> 1044 # choice, we must perform a versioned check to disable this warning.
>> 1045 # https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
>> 1046 KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than)
>> 1047 endif
987 1048
988 # disable invalid "can't wrap" optimizations f 1049 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow 1050 KBUILD_CFLAGS += -fno-strict-overflow
990 1051
991 # Make sure -fstack-check isn't enabled (like 1052 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check 1053 KBUILD_CFLAGS += -fno-stack-check
993 1054
994 # conserve stack if available 1055 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC 1056 ifdef CONFIG_CC_IS_GCC
996 KBUILD_CFLAGS += -fconserve-stack 1057 KBUILD_CFLAGS += -fconserve-stack
997 endif 1058 endif
998 1059
>> 1060 # Prohibit date/time macros, which would make the build non-deterministic
>> 1061 KBUILD_CFLAGS += -Werror=date-time
>> 1062
>> 1063 # enforce correct pointer usage
>> 1064 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>> 1065
>> 1066 # Require designated initializers for all marked structures
>> 1067 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
>> 1068
999 # change __FILE__ to the relative path from th 1069 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p 1070 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001 1071
1002 # include additional Makefiles when needed 1072 # include additional Makefiles when needed
1003 include-y := scripts/Ma 1073 include-y := scripts/Makefile.extrawarn
1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma <<
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma <<
1006 include-$(CONFIG_KASAN) += scripts/Ma 1074 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
1007 include-$(CONFIG_KCSAN) += scripts/Ma 1075 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
1008 include-$(CONFIG_KMSAN) += scripts/Ma <<
1009 include-$(CONFIG_UBSAN) += scripts/Ma 1076 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
1010 include-$(CONFIG_KCOV) += scripts/Ma 1077 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
1011 include-$(CONFIG_RANDSTRUCT) += scripts/Ma <<
1012 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma 1078 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
1013 1079
1014 include $(addprefix $(srctree)/, $(include-y) 1080 include $(addprefix $(srctree)/, $(include-y))
1015 1081
1016 # scripts/Makefile.gcc-plugins is intentional 1082 # scripts/Makefile.gcc-plugins is intentionally included last.
1017 # Do not add $(call cc-option,...) below this 1083 # Do not add $(call cc-option,...) below this line. When you build the kernel
1018 # from the clean source tree, the GCC plugins 1084 # from the clean source tree, the GCC plugins do not exist at this point.
1019 1085
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS !! 1086 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1087 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1022 KBUILD_AFLAGS += $(KAFLAGS) 1088 KBUILD_AFLAGS += $(KAFLAGS)
1023 KBUILD_CFLAGS += $(KCFLAGS) 1089 KBUILD_CFLAGS += $(KCFLAGS)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) <<
1025 1090
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1091 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1027 LDFLAGS_vmlinux += --build-id=sha1 1092 LDFLAGS_vmlinux += --build-id=sha1
1028 1093
1029 KBUILD_LDFLAGS += -z noexecstack 1094 KBUILD_LDFLAGS += -z noexecstack
1030 ifeq ($(CONFIG_LD_IS_BFD),y) 1095 ifeq ($(CONFIG_LD_IS_BFD),y)
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn 1096 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
1032 endif 1097 endif
1033 1098
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1099 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X !! 1100 LDFLAGS_vmlinux += $(call ld-option, -X,)
1036 endif 1101 endif
1037 1102
1038 ifeq ($(CONFIG_RELR),y) 1103 ifeq ($(CONFIG_RELR),y)
1039 # ld.lld before 15 did not support -z pack-re !! 1104 LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1041 endif 1105 endif
1042 1106
1043 # We never want expected sections to be place 1107 # We never want expected sections to be placed heuristically by the
1044 # linker. All sections should be explicitly n 1108 # linker. All sections should be explicitly named in the linker script.
1045 ifdef CONFIG_LD_ORPHAN_WARN 1109 ifdef CONFIG_LD_ORPHAN_WARN
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG !! 1110 LDFLAGS_vmlinux += --orphan-handling=warn
1047 endif 1111 endif
1048 1112
1049 # Align the bit size of userspace programs wi 1113 # Align the bit size of userspace programs with the kernel
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta 1114 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta 1115 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1052 1116
1053 # make the checker run with the right archite 1117 # make the checker run with the right architecture
1054 CHECKFLAGS += --arch=$(ARCH) 1118 CHECKFLAGS += --arch=$(ARCH)
1055 1119
1056 # insure the checker run with the right endia 1120 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 1121 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058 1122
1059 # the checker needs the correct machine size 1123 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1124 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061 1125
1062 # Default kernel image to build when no speci 1126 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 1127 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 1128 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 1129 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 1130 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 1131 export KBUILD_IMAGE ?= vmlinux
1068 1132
1069 # 1133 #
1070 # INSTALL_PATH specifies where to place the u 1134 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 1135 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 1136 export INSTALL_PATH ?= /boot
1073 1137
1074 # 1138 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 1139 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 1140 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 1141 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 1142 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 1143 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 1144
1081 # 1145 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 1146 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 1147 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 1148 # makefile but the argument can be passed to make if needed.
1085 # 1149 #
1086 1150
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 1151 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 1152 export MODLIB
1089 1153
1090 PHONY += prepare0 1154 PHONY += prepare0
1091 1155
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), 1156 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1093 export MODORDER := $(extmod_prefix)modules.or 1157 export MODORDER := $(extmod_prefix)modules.order
1094 export MODULES_NSDEPS := $(extmod_prefix)modu 1158 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1095 1159
1096 ifeq ($(KBUILD_EXTMOD),) 1160 ifeq ($(KBUILD_EXTMOD),)
>> 1161 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
>> 1162 core-$(CONFIG_BLOCK) += block/
>> 1163 core-$(CONFIG_IO_URING) += io_uring/
>> 1164
>> 1165 vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
>> 1166 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 1167 $(libs-y) $(libs-m)))
1097 1168
1098 build-dir := . !! 1169 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1099 clean-dirs := $(sort . Documentation \ <<
1100 $(patsubst %/,%,$(filter 1170 $(patsubst %/,%,$(filter %/, $(core-) \
1101 $(drivers-) $(libs-)) 1171 $(drivers-) $(libs-))))
1102 1172
1103 export ARCH_CORE := $(core-y) !! 1173 build-dirs := $(vmlinux-dirs)
1104 export ARCH_LIB := $(filter %/, $(lib !! 1174 clean-dirs := $(vmlinux-alldirs)
1105 export ARCH_DRIVERS := $(drivers-y) $(dri <<
1106 # Externally visible symbols (used by link-vm <<
1107 1175
1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 1176 subdir-modorder := $(addsuffix /modules.order, $(build-dirs))
>> 1177
>> 1178 # Externally visible symbols (used by link-vmlinux.sh)
>> 1179 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
>> 1180 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1109 ifdef CONFIG_MODULES 1181 ifdef CONFIG_MODULES
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a 1182 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib 1183 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1112 else 1184 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, 1185 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1114 endif 1186 endif
>> 1187 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1115 1188
1116 export KBUILD_VMLINUX_LIBS !! 1189 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1117 export KBUILD_LDS := arch/$(SRCARCH) 1190 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 1191 # used by scripts/Makefile.package
>> 1192 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1118 1193
>> 1194 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
>> 1195
>> 1196 # Recurse until adjust_autoksyms.sh is satisfied
>> 1197 PHONY += autoksyms_recursive
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1198 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the 1199 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi 1200 # we have to build modules as well to determine what those symbols are.
>> 1201 # (this can be evaluated only once include/config/auto.conf has been included)
1122 KBUILD_MODULES := 1 1202 KBUILD_MODULES := 1
>> 1203
>> 1204 autoksyms_recursive: descend modules.order
>> 1205 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
>> 1206 "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
1123 endif 1207 endif
1124 1208
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1209 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 1210
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1211 quiet_cmd_autoksyms_h = GEN $@
1141 @: !! 1212 cmd_autoksyms_h = mkdir -p $(dir $@); \
>> 1213 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
1142 1214
1143 PHONY += vmlinux !! 1215 $(autoksyms_h):
1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1216 $(call cmd,autoksyms_h)
1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1217
1146 # unrelated; the decompressors just happen to !! 1218 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1147 # arch/*/boot/compressed/vmlinux. !! 1219
1148 # Export LDFLAGS_vmlinux only to scripts/Make !! 1220 # Final link of vmlinux with optional arch pass after final link
1149 # !! 1221 cmd_link-vmlinux = \
1150 # _LDFLAGS_vmlinux is a workaround for the 'p !! 1222 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
1151 # https://savannah.gnu.org/bugs/?61463 !! 1223 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1152 # For Make > 4.4, the following simple code w !! 1224
1153 # vmlinux: private export LDFLAGS_vmlinux := !! 1225 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG !! 1226 +$(call if_changed_dep,link-vmlinux)
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ !! 1227
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost !! 1228 targets := vmlinux
1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1158 1229
1159 # The actual objects are generated when desce 1230 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1231 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1232 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1162 1233
1163 ifeq ($(origin KERNELRELEASE),file) !! 1234 filechk_kernel.release = \
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1235 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1165 else <<
1166 filechk_kernel.release = echo $(KERNELRELEASE <<
1167 endif <<
1168 1236
1169 # Store (new) KERNELRELEASE string in include 1237 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE 1238 include/config/kernel.release: FORCE
1171 $(call filechk,kernel.release) 1239 $(call filechk,kernel.release)
1172 1240
1173 # Additional helpers built in scripts/ 1241 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr 1242 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel 1243 # in parallel
1176 PHONY += scripts 1244 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc 1245 scripts: scripts_basic scripts_dtc
1178 $(Q)$(MAKE) $(build)=$(@) 1246 $(Q)$(MAKE) $(build)=$(@)
1179 1247
1180 # Things we need to do before we recursively 1248 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1249 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1250 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1251 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1252 # version.h and scripts_basic is processed / created.
1185 1253
1186 PHONY += prepare archprepare 1254 PHONY += prepare archprepare
1187 1255
1188 archprepare: outputmakefile archheaders archs 1256 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1189 asm-generic $(version_h) include/gene !! 1257 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1190 include/generated/compile.h include/g !! 1258 include/generated/autoconf.h remove-stale-files
1191 1259
1192 prepare0: archprepare 1260 prepare0: archprepare
1193 $(Q)$(MAKE) $(build)=scripts/mod 1261 $(Q)$(MAKE) $(build)=scripts/mod
1194 $(Q)$(MAKE) $(build)=. prepare !! 1262 $(Q)$(MAKE) $(build)=.
1195 1263
1196 # All the preparing.. 1264 # All the preparing..
1197 prepare: prepare0 1265 prepare: prepare0
1198 ifdef CONFIG_RUST <<
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1200 $(Q)$(MAKE) $(build)=rust <<
1201 endif <<
1202 1266
1203 PHONY += remove-stale-files 1267 PHONY += remove-stale-files
1204 remove-stale-files: 1268 remove-stale-files:
1205 $(Q)$(srctree)/scripts/remove-stale-f 1269 $(Q)$(srctree)/scripts/remove-stale-files
1206 1270
1207 # Support for using generic headers in asm-ge 1271 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1272 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209 1273
1210 PHONY += asm-generic uapi-asm-generic 1274 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic 1275 asm-generic: uapi-asm-generic
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1276 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1213 generic=include/asm-generic 1277 generic=include/asm-generic
1214 uapi-asm-generic: 1278 uapi-asm-generic:
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1279 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1216 generic=include/uapi/asm-generic 1280 generic=include/uapi/asm-generic
1217 1281
1218 # Generate some files 1282 # Generate some files
1219 # ------------------------------------------- 1283 # ---------------------------------------------------------------------------
1220 1284
1221 # KERNELRELEASE can change from a few differe 1285 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1286 # needs to be updated, so this check is forced on all builds
1223 1287
1224 uts_len := 64 1288 uts_len := 64
1225 define filechk_utsrelease.h 1289 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1290 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1291 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1292 exit 1; \
1229 fi; 1293 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR 1294 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef 1295 endef
1232 1296
1233 define filechk_version.h 1297 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then 1298 if [ $(SUBLEVEL) -gt 255 ]; then \
1235 echo \#define LINUX_VERSION_C 1299 echo \#define LINUX_VERSION_CODE $(shell \
1236 expr $(VERSION) \* 65536 + $( 1300 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1237 else 1301 else \
1238 echo \#define LINUX_VERSION_C 1302 echo \#define LINUX_VERSION_CODE $(shell \
1239 expr $(VERSION) \* 65536 + $( 1303 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1240 fi; 1304 fi; \
1241 echo '#define KERNEL_VERSION(a,b,c) ( 1305 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
1242 ((c) > 255 ? 255 : (c)))'; 1306 ((c) > 255 ? 255 : (c)))'; \
1243 echo \#define LINUX_VERSION_MAJOR $(V 1307 echo \#define LINUX_VERSION_MAJOR $(VERSION); \
1244 echo \#define LINUX_VERSION_PATCHLEVE 1308 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
1245 echo \#define LINUX_VERSION_SUBLEVEL 1309 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1246 endef 1310 endef
1247 1311
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1312 $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1249 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1313 $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
1250 $(version_h): FORCE 1314 $(version_h): FORCE
1251 $(call filechk,version.h) 1315 $(call filechk,version.h)
1252 1316
1253 include/generated/utsrelease.h: include/confi 1317 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1318 $(call filechk,utsrelease.h)
1255 1319
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 1320 PHONY += headerdep
1263 headerdep: 1321 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1322 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1323 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1324
1267 # ------------------------------------------- 1325 # ---------------------------------------------------------------------------
1268 # Kernel headers 1326 # Kernel headers
1269 1327
1270 #Default location for installed headers 1328 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1329 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1330
1273 quiet_cmd_headers_install = INSTALL $(INSTALL 1331 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1274 cmd_headers_install = \ 1332 cmd_headers_install = \
1275 mkdir -p $(INSTALL_HDR_PATH); \ 1333 mkdir -p $(INSTALL_HDR_PATH); \
1276 rsync -mrl --include='*/' --include=' 1334 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1277 usr/include $(INSTALL_HDR_PATH) 1335 usr/include $(INSTALL_HDR_PATH)
1278 1336
1279 PHONY += headers_install 1337 PHONY += headers_install
1280 headers_install: headers 1338 headers_install: headers
1281 $(call cmd,headers_install) 1339 $(call cmd,headers_install)
1282 1340
1283 PHONY += archheaders archscripts 1341 PHONY += archheaders archscripts
1284 1342
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he 1343 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1286 1344
1287 PHONY += headers 1345 PHONY += headers
1288 headers: $(version_h) scripts_unifdef uapi-as 1346 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1289 $(if $(filter um, $(SRCARCH)), $(erro 1347 $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1348 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1349 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1292 1350
>> 1351 # Deprecated. It is no-op now.
>> 1352 PHONY += headers_check
>> 1353 headers_check:
>> 1354 @echo >&2 "=================== WARNING ==================="
>> 1355 @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
>> 1356 @echo >&2 "and will be removed after Linux 5.15 release."
>> 1357 @echo >&2 "Please remove headers_check from your scripts."
>> 1358 @echo >&2 "==============================================="
>> 1359
1293 ifdef CONFIG_HEADERS_INSTALL 1360 ifdef CONFIG_HEADERS_INSTALL
1294 prepare: headers 1361 prepare: headers
1295 endif 1362 endif
1296 1363
1297 PHONY += scripts_unifdef 1364 PHONY += scripts_unifdef
1298 scripts_unifdef: scripts_basic 1365 scripts_unifdef: scripts_basic
1299 $(Q)$(MAKE) $(build)=scripts scripts/ 1366 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1300 1367
1301 # ------------------------------------------- 1368 # ---------------------------------------------------------------------------
1302 # Install 1369 # Install
1303 1370
1304 # Many distributions have the custom install 1371 # Many distributions have the custom install script, /sbin/installkernel.
1305 # If DKMS is installed, 'make install' will e !! 1372 # If DKMS is installed, 'make install' will eventually recuses back
1306 # to this Makefile to build and install exter !! 1373 # to the this Makefile to build and install external modules.
1307 # Cancel sub_make_done so that options such a 1374 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1308 1375
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) !! 1376 install: sub_make_done :=
1310 cmd_install = unset sub_make_done; $(sr <<
1311 <<
1312 # ------------------------------------------- <<
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 1377
1320 # ------------------------------------------- 1378 # ---------------------------------------------------------------------------
1321 # Tools 1379 # Tools
1322 1380
1323 ifdef CONFIG_OBJTOOL !! 1381 ifdef CONFIG_STACK_VALIDATION
1324 prepare: tools/objtool 1382 prepare: tools/objtool
1325 endif 1383 endif
1326 1384
1327 ifdef CONFIG_BPF 1385 ifdef CONFIG_BPF
1328 ifdef CONFIG_DEBUG_INFO_BTF 1386 ifdef CONFIG_DEBUG_INFO_BTF
1329 prepare: tools/bpf/resolve_btfids 1387 prepare: tools/bpf/resolve_btfids
1330 endif 1388 endif
1331 endif 1389 endif
1332 1390
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 1391 PHONY += resolve_btfids_clean
1340 1392
1341 resolve_btfids_O = $(abspath $(objtree))/tool 1393 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1342 1394
1343 # tools/bpf/resolve_btfids directory might no 1395 # tools/bpf/resolve_btfids directory might not exist
1344 # in output directory, skip its clean in that 1396 # in output directory, skip its clean in that case
1345 resolve_btfids_clean: 1397 resolve_btfids_clean:
1346 ifneq ($(wildcard $(resolve_btfids_O)),) 1398 ifneq ($(wildcard $(resolve_btfids_O)),)
1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ 1399 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1348 endif 1400 endif
1349 1401
1350 # Clear a bunch of variables before executing 1402 # Clear a bunch of variables before executing the submake
1351 ifeq ($(quiet),silent_) 1403 ifeq ($(quiet),silent_)
1352 tools_silent=s 1404 tools_silent=s
1353 endif 1405 endif
1354 1406
1355 tools/: FORCE 1407 tools/: FORCE
1356 $(Q)mkdir -p $(objtree)/tools 1408 $(Q)mkdir -p $(objtree)/tools
1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1409 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1358 1410
1359 tools/%: FORCE 1411 tools/%: FORCE
1360 $(Q)mkdir -p $(objtree)/tools 1412 $(Q)mkdir -p $(objtree)/tools
1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too 1413 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1362 1414
1363 # ------------------------------------------- 1415 # ---------------------------------------------------------------------------
1364 # Kernel selftest 1416 # Kernel selftest
1365 1417
1366 PHONY += kselftest 1418 PHONY += kselftest
1367 kselftest: headers !! 1419 kselftest:
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1420 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369 1421
1370 kselftest-%: headers FORCE !! 1422 kselftest-%: FORCE
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi 1423 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1372 1424
1373 PHONY += kselftest-merge 1425 PHONY += kselftest-merge
1374 kselftest-merge: 1426 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1427 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1428 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1377 xargs $(srctree)/scripts/kcon !! 1429 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1430 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379 1431
1380 # ------------------------------------------- 1432 # ---------------------------------------------------------------------------
1381 # Devicetree files 1433 # Devicetree files
1382 1434
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1435 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts 1436 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif 1437 endif
1386 1438
1387 ifneq ($(dtstree),) 1439 ifneq ($(dtstree),)
1388 1440
1389 %.dtb: dtbs_prepare !! 1441 %.dtb: include/config/kernel.release scripts_dtc
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1442 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1391 1443
1392 %.dtbo: dtbs_prepare !! 1444 %.dtbo: include/config/kernel.release scripts_dtc
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1445 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394 1446
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1447 PHONY += dtbs dtbs_install dtbs_check
1396 dtbs: dtbs_prepare !! 1448 dtbs: include/config/kernel.release scripts_dtc
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1449 $(Q)$(MAKE) $(build)=$(dtstree)
1398 <<
1399 # include/config/kernel.release is actually n <<
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) <<
1401 # dtbs_install depend on it as dtbs_install m <<
1402 dtbs_prepare: include/config/kernel.release s <<
1403 1450
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1451 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1405 export CHECK_DTBS=y 1452 export CHECK_DTBS=y
1406 endif !! 1453 dtbs: dt_binding_check
1407 <<
1408 ifneq ($(CHECK_DTBS),) <<
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif 1454 endif
1411 1455
1412 dtbs_check: dtbs 1456 dtbs_check: dtbs
1413 1457
1414 dtbs_install: 1458 dtbs_install:
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1459 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1416 1460
1417 ifdef CONFIG_OF_EARLY_FLATTREE 1461 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs 1462 all: dtbs
1419 endif 1463 endif
1420 1464
1421 endif 1465 endif
1422 1466
1423 PHONY += scripts_dtc 1467 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic 1468 scripts_dtc: scripts_basic
1425 $(Q)$(MAKE) $(build)=scripts/dtc 1469 $(Q)$(MAKE) $(build)=scripts/dtc
1426 1470
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO 1471 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1428 export CHECK_DTBS=y !! 1472 export CHECK_DT_BINDING=y
1429 endif 1473 endif
1430 1474
1431 PHONY += dt_binding_check dt_binding_schemas !! 1475 PHONY += dt_binding_check
1432 dt_binding_check: dt_binding_schemas scripts_ !! 1476 dt_binding_check: scripts_dtc
1433 $(Q)$(MAKE) $(build)=Documentation/de <<
1434 <<
1435 dt_binding_schemas: <<
1436 $(Q)$(MAKE) $(build)=Documentation/de 1477 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437 1478
1438 PHONY += dt_compatible_check <<
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 <<
1442 # ------------------------------------------- 1479 # ---------------------------------------------------------------------------
1443 # Modules 1480 # Modules
1444 1481
1445 ifdef CONFIG_MODULES 1482 ifdef CONFIG_MODULES
1446 1483
1447 # By default, build modules as well 1484 # By default, build modules as well
1448 1485
1449 all: modules 1486 all: modules
1450 1487
1451 # When we're building modules with modversion 1488 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as 1489 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo 1490 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS 1491 ifdef CONFIG_MODVERSIONS
1455 KBUILD_BUILTIN := 1 1492 KBUILD_BUILTIN := 1
1456 endif 1493 endif
1457 1494
1458 # Build modules 1495 # Build modules
1459 # 1496 #
>> 1497 # A module can be listed more than once in obj-m resulting in
>> 1498 # duplicate lines in modules.order files. Those are removed
>> 1499 # using awk while concatenating to the final file.
1460 1500
1461 # *.ko are usually independent of vmlinux, bu !! 1501 PHONY += modules
1462 # is an exception. !! 1502 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 1503
1468 modules: modules_prepare !! 1504 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
>> 1505
>> 1506 modules.order: $(subdir-modorder) FORCE
>> 1507 $(call if_changed,modules_order)
>> 1508
>> 1509 targets += modules.order
1469 1510
1470 # Target to prepare building external modules 1511 # Target to prepare building external modules
>> 1512 PHONY += modules_prepare
1471 modules_prepare: prepare 1513 modules_prepare: prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ 1514 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1473 1515
>> 1516 export modules_sign_only :=
>> 1517
>> 1518 ifeq ($(CONFIG_MODULE_SIG),y)
>> 1519 PHONY += modules_sign
>> 1520 modules_sign: modules_install
>> 1521 @:
>> 1522
>> 1523 # modules_sign is a subset of modules_install.
>> 1524 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
>> 1525 ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1526 modules_sign_only := y
>> 1527 endif
>> 1528 endif
>> 1529
>> 1530 modinst_pre :=
>> 1531 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1532 modinst_pre := __modinst_pre
>> 1533 endif
>> 1534
>> 1535 modules_install: $(modinst_pre)
>> 1536 PHONY += __modinst_pre
>> 1537 __modinst_pre:
>> 1538 @rm -rf $(MODLIB)/kernel
>> 1539 @rm -f $(MODLIB)/source
>> 1540 @mkdir -p $(MODLIB)/kernel
>> 1541 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1542 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1543 rm -f $(MODLIB)/build ; \
>> 1544 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1545 fi
>> 1546 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
>> 1547 @cp -f modules.builtin $(MODLIB)/
>> 1548 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
>> 1549
1474 endif # CONFIG_MODULES 1550 endif # CONFIG_MODULES
1475 1551
1476 ### 1552 ###
1477 # Cleaning is done on three levels. 1553 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1554 # make clean Delete most generated files
1479 # Leave enough to build extern 1555 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1556 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1557 # make distclean Remove editor backup files, patch leftover files and the like
1482 1558
1483 # Directories & files removed with 'make clea 1559 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1560 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
1485 modules.builtin modules.builti 1561 modules.builtin modules.builtin.modinfo modules.nsdeps \
1486 compile_commands.json rust/tes !! 1562 compile_commands.json
1487 rust-project.json .vmlinux.obj <<
1488 1563
1489 # Directories & files removed with 'make mrpr 1564 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene 1565 MRPROPER_FILES += include/config include/generated \
1491 arch/$(SRCARCH)/include/gen !! 1566 arch/$(SRCARCH)/include/generated .tmp_objdiff \
1492 debian snap tar-install PKG !! 1567 debian snap tar-install \
1493 .config .config.old .versio 1568 .config .config.old .version \
1494 Module.symvers \ 1569 Module.symvers \
1495 certs/signing_key.pem \ !! 1570 certs/signing_key.pem certs/signing_key.x509 \
1496 certs/x509.genkey \ 1571 certs/x509.genkey \
1497 vmlinux-gdb.py \ 1572 vmlinux-gdb.py \
1498 rpmbuild \ !! 1573 *.spec
1499 rust/libmacros.so <<
1500 1574
1501 # clean - Delete most, but leave enough to bu 1575 # clean - Delete most, but leave enough to build external modules
1502 # 1576 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1577 clean: rm-files := $(CLEAN_FILES)
1504 1578
1505 PHONY += archclean vmlinuxclean 1579 PHONY += archclean vmlinuxclean
1506 1580
1507 vmlinuxclean: 1581 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1582 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1583 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1584
1511 clean: archclean vmlinuxclean resolve_btfids_ 1585 clean: archclean vmlinuxclean resolve_btfids_clean
1512 1586
1513 # mrproper - Delete all generated files, incl 1587 # mrproper - Delete all generated files, including .config
1514 # 1588 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1589 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs := $(addprefix _mrproper_, 1590 mrproper-dirs := $(addprefix _mrproper_,scripts)
1517 1591
1518 PHONY += $(mrproper-dirs) mrproper 1592 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs): 1593 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1594 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1595
1522 mrproper: clean $(mrproper-dirs) 1596 mrproper: clean $(mrproper-dirs)
1523 $(call cmd,rmfiles) 1597 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 1598
1528 # distclean 1599 # distclean
1529 # 1600 #
1530 PHONY += distclean 1601 PHONY += distclean
1531 1602
1532 distclean: mrproper 1603 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ 1604 @find . $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1605 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* 1606 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536 -o -name 'core' -o -name tags 1607 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1537 -o -name GPATH -o -name GRTAG 1608 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
1538 -type f -print | xargs rm -f 1609 -type f -print | xargs rm -f
1539 1610
1540 1611
1541 # Packaging of the kernel to various formats 1612 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1613 # ---------------------------------------------------------------------------
1543 1614
1544 %src-pkg: FORCE 1615 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1616 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1546 %pkg: include/config/kernel.release FORCE 1617 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1618 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1548 1619
1549 # Brief documentation of the typical targets 1620 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1621 # ---------------------------------------------------------------------------
1551 1622
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1623 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1624 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1625 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1626 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1627
1557 PHONY += help 1628 PHONY += help
1558 help: 1629 help:
1559 @echo 'Cleaning targets:' 1630 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1631 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1632 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1633 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1634 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1635 @echo ''
>> 1636 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1637 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1638 @echo ''
1567 @echo 'Other generic targets:' 1639 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1640 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1641 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1642 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1643 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 1644 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1645 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1646 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1647 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1648 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1649 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1650 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1651 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1652 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1653 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1654 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1655 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1656 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1657 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1658 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1659 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1660 echo ''
1590 @echo 'Static analysers:' 1661 @echo 'Static analysers:'
1591 @echo ' checkstack - Generate !! 1662 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st <<
1593 @echo ' versioncheck - Sanity ch 1663 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1664 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1665 @echo ' export_report - List the usages of all exported symbols'
1596 @echo ' headerdep - Detect in 1666 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit 1667 @echo ' coccicheck - Check with Coccinelle'
1598 @echo ' clang-analyzer - Check wit 1668 @echo ' clang-analyzer - Check with clang static analyzer'
1599 @echo ' clang-tidy - Check wit 1669 @echo ' clang-tidy - Check with clang-tidy'
1600 @echo '' 1670 @echo ''
1601 @echo 'Tools:' 1671 @echo 'Tools:'
1602 @echo ' nsdeps - Generate 1672 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1603 @echo '' 1673 @echo ''
1604 @echo 'Kernel selftest:' 1674 @echo 'Kernel selftest:'
1605 @echo ' kselftest - Build a 1675 @echo ' kselftest - Build and run kernel selftest'
1606 @echo ' Build, 1676 @echo ' Build, install, and boot kernel before'
1607 @echo ' running 1677 @echo ' running kselftest on it'
1608 @echo ' Run as 1678 @echo ' Run as root for full coverage'
1609 @echo ' kselftest-all - Build k 1679 @echo ' kselftest-all - Build kernel selftest'
1610 @echo ' kselftest-install - Build a 1680 @echo ' kselftest-install - Build and install kernel selftest'
1611 @echo ' kselftest-clean - Remove 1681 @echo ' kselftest-clean - Remove all generated kselftest files'
1612 @echo ' kselftest-merge - Merge a 1682 @echo ' kselftest-merge - Merge all the config dependencies of'
1613 @echo ' kselfte 1683 @echo ' kselftest to existing .config.'
1614 @echo '' 1684 @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 $(dtstree), \ 1685 @$(if $(dtstree), \
1634 echo 'Devicetree:'; \ 1686 echo 'Devicetree:'; \
1635 echo '* dtbs - !! 1687 echo '* dtbs - Build device tree blobs for enabled boards'; \
1636 echo ' dtbs_install - !! 1688 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637 echo ' dt_binding_check - !! 1689 echo ' dt_binding_check - Validate device tree binding documents'; \
1638 echo ' dt_binding_schema - !! 1690 echo ' dtbs_check - Validate device tree source files';\
1639 echo ' dtbs_check - <<
1640 echo '') 1691 echo '')
1641 1692
1642 @echo 'Userspace tools targets:' 1693 @echo 'Userspace tools targets:'
1643 @echo ' use "make tools/help"' 1694 @echo ' use "make tools/help"'
1644 @echo ' or "cd tools; make help"' 1695 @echo ' or "cd tools; make help"'
1645 @echo '' 1696 @echo ''
1646 @echo 'Kernel packaging:' 1697 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi 1698 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1648 @echo '' 1699 @echo ''
1649 @echo 'Documentation targets:' 1700 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ 1701 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651 @echo '' 1702 @echo ''
1652 @echo 'Architecture-specific targets !! 1703 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ !! 1704 @$(if $(archhelp),$(archhelp),\
1654 echo ' No architecture-speci !! 1705 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1706 @echo ''
1656 @$(if $(boards), \ 1707 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1708 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % 1709 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1710 echo '')
1660 @$(if $(board-dirs), \ 1711 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1712 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1713 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1714 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1715 echo '')
1665 1716
1666 @echo ' make V=n [targets] 1: ver !! 1717 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667 @echo ' 2: giv !! 1718 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 1719 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check 1720 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1671 @echo ' (spars 1721 @echo ' (sparse by default)'
1672 @echo ' make C=2 [targets] Force 1722 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1723 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1724 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1725 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1726 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1727 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a <<
1680 @echo ' Multiple leve 1728 @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 '' 1729 @echo ''
1686 @echo 'Execute "make" or "make all" 1730 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1731 @echo 'For further info see the ./README file'
1688 1732
1689 1733
1690 help-board-dirs := $(addprefix help-,$(board- 1734 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1735
1692 help-boards: $(help-board-dirs) 1736 help-boards: $(help-board-dirs)
1693 1737
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1738 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1739
1696 $(help-board-dirs): help-%: 1740 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1741 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1742 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1743 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1744 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1745 echo '')
1702 1746
1703 1747
1704 # Documentation targets 1748 # Documentation targets
1705 # ------------------------------------------- 1749 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1750 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707 linkcheckdocs dochelp refcheck !! 1751 linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS) 1752 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): 1753 $(DOC_TARGETS):
1710 $(Q)$(MAKE) $(build)=Documentation $@ 1754 $(Q)$(MAKE) $(build)=Documentation $@
1711 1755
1712 <<
1713 # Rust targets <<
1714 # ------------------------------------------- <<
1715 <<
1716 # "Is Rust available?" target <<
1717 PHONY += rustavailable <<
1718 rustavailable: <<
1719 +$(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 1756 # Misc
1754 # ------------------------------------------- 1757 # ---------------------------------------------------------------------------
1755 1758
1756 PHONY += misc-check <<
1757 misc-check: <<
1758 $(Q)$(srctree)/scripts/misc-check <<
1759 <<
1760 all: misc-check <<
1761 <<
1762 PHONY += scripts_gdb 1759 PHONY += scripts_gdb
1763 scripts_gdb: prepare0 1760 scripts_gdb: prepare0
1764 $(Q)$(MAKE) $(build)=scripts/gdb 1761 $(Q)$(MAKE) $(build)=scripts/gdb
1765 $(Q)ln -fsn $(abspath $(srctree)/scri 1762 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1766 1763
1767 ifdef CONFIG_GDB_SCRIPTS 1764 ifdef CONFIG_GDB_SCRIPTS
1768 all: scripts_gdb 1765 all: scripts_gdb
1769 endif 1766 endif
1770 1767
1771 else # KBUILD_EXTMOD 1768 else # KBUILD_EXTMOD
1772 1769
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### 1770 ###
1776 # External module support. 1771 # External module support.
1777 # When building external modules the kernel u 1772 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1773 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1774 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands 1775 # in the basis kernel ordinary make commands (without M=...) must be used.
1781 1776
1782 # We are always building only modules. 1777 # We are always building only modules.
1783 KBUILD_BUILTIN := 1778 KBUILD_BUILTIN :=
1784 KBUILD_MODULES := 1 1779 KBUILD_MODULES := 1
1785 1780
1786 build-dir := $(KBUILD_EXTMOD) !! 1781 build-dirs := $(KBUILD_EXTMOD)
>> 1782 $(MODORDER): descend
>> 1783 @:
1787 1784
1788 compile_commands.json: $(extmod_prefix)compil 1785 compile_commands.json: $(extmod_prefix)compile_commands.json
1789 PHONY += compile_commands.json 1786 PHONY += compile_commands.json
1790 1787
1791 clean-dirs := $(KBUILD_EXTMOD) 1788 clean-dirs := $(KBUILD_EXTMOD)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1789 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1793 $(KBUILD_EXTMOD)/compile_commands.jso 1790 $(KBUILD_EXTMOD)/compile_commands.json
1794 1791
1795 PHONY += prepare 1792 PHONY += prepare
1796 # now expand this into a simple variable to r 1793 # now expand this into a simple variable to reduce the cost of shell evaluations
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT 1794 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
1798 prepare: 1795 prepare:
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1796 @if [ "$(CC_VERSION_TEXT)" != $(CONFIG_CC_VERSION_TEXT) ]; then \
1800 echo >&2 "warning: the compil 1797 echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1801 echo >&2 " The kernel was bu !! 1798 echo >&2 " The kernel was built by: "$(CONFIG_CC_VERSION_TEXT); \
1802 echo >&2 " You are using: 1799 echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
1803 fi 1800 fi
1804 1801
1805 PHONY += help 1802 PHONY += help
1806 help: 1803 help:
1807 @echo ' Building external modules.' 1804 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1805 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1806 @echo ''
1810 @echo ' modules - default t 1807 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1808 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1809 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1810 @echo ''
1815 1811
1816 ifndef CONFIG_MODULES !! 1812 # no-op for external module builds
1817 modules modules_install: __external_modules_e !! 1813 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 1814
1826 endif # KBUILD_EXTMOD 1815 endif # KBUILD_EXTMOD
1827 1816
1828 # ------------------------------------------- 1817 # ---------------------------------------------------------------------------
1829 # Modules 1818 # Modules
1830 1819
1831 PHONY += modules modules_install modules_sign !! 1820 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 1821
1850 ifdef CONFIG_MODULES 1822 ifdef CONFIG_MODULES
1851 1823
1852 $(MODORDER): $(build-dir) !! 1824 modules: modules_check
1853 @: !! 1825 $(Q)$(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 1826
1862 PHONY += modules_check 1827 PHONY += modules_check
1863 modules_check: $(MODORDER) 1828 modules_check: $(MODORDER)
1864 $(Q)$(CONFIG_SHELL) $(srctree)/script 1829 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1865 1830
>> 1831 quiet_cmd_depmod = DEPMOD $(MODLIB)
>> 1832 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1833 $(KERNELRELEASE)
>> 1834
>> 1835 modules_install:
>> 1836 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1837 ifndef modules_sign_only
>> 1838 $(call cmd,depmod)
>> 1839 endif
>> 1840
1866 else # CONFIG_MODULES 1841 else # CONFIG_MODULES
1867 1842
1868 modules: !! 1843 # Modules not configured
1869 @: !! 1844 # ---------------------------------------------------------------------------
>> 1845
>> 1846 modules modules_install:
>> 1847 @echo >&2 '***'
>> 1848 @echo >&2 '*** The present kernel configuration has modules disabled.'
>> 1849 @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
>> 1850 @echo >&2 '*** to enable CONFIG_MODULES.'
>> 1851 @echo >&2 '***'
>> 1852 @exit 1
1870 1853
1871 KBUILD_MODULES := 1854 KBUILD_MODULES :=
1872 1855
1873 endif # CONFIG_MODULES 1856 endif # CONFIG_MODULES
1874 1857
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 1858 # Single targets
1881 # ------------------------------------------- 1859 # ---------------------------------------------------------------------------
1882 # To build individual files in subdirectories 1860 # To build individual files in subdirectories, you can do like this:
1883 # 1861 #
1884 # make foo/bar/baz.s 1862 # make foo/bar/baz.s
1885 # 1863 #
1886 # The supported suffixes for single-target ar 1864 # The supported suffixes for single-target are listed in 'single-targets'
1887 # 1865 #
1888 # To build only under specific subdirectories 1866 # To build only under specific subdirectories, you can do like this:
1889 # 1867 #
1890 # make foo/bar/baz/ 1868 # make foo/bar/baz/
1891 1869
1892 ifdef single-build 1870 ifdef single-build
1893 1871
1894 # .ko is special because modpost is needed 1872 # .ko is special because modpost is needed
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG 1873 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1896 single-no-ko := $(filter-out $(single-ko), $( !! 1874 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1897 $(foreach x, o mod, $(patsubs <<
1898 1875
1899 $(single-ko): single_modules !! 1876 $(single-ko): single_modpost
1900 @: 1877 @:
1901 $(single-no-ko): $(build-dir) !! 1878 $(single-no-ko): descend
1902 @: 1879 @:
1903 1880
1904 # Remove MODORDER when done because it is not 1881 # Remove MODORDER when done because it is not the real one.
1905 PHONY += single_modules !! 1882 PHONY += single_modpost
1906 single_modules: $(single-no-ko) modules_prepa !! 1883 single_modpost: $(single-no-ko) modules_prepare
1907 $(Q){ $(foreach m, $(single-ko), echo !! 1884 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1885 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1911 endif <<
1912 $(Q)rm -f $(MODORDER) 1886 $(Q)rm -f $(MODORDER)
1913 1887
1914 single-goals := $(addprefix $(build-dir)/, $( !! 1888 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
>> 1889
>> 1890 # trim unrelated directories
>> 1891 build-dirs := $(foreach d, $(build-dirs), \
>> 1892 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1915 1893
1916 KBUILD_MODULES := 1 1894 KBUILD_MODULES := 1
1917 1895
1918 endif 1896 endif
1919 1897
>> 1898 # Handle descending into subdirectories listed in $(build-dirs)
1920 # Preset locale variables to speed up the bui 1899 # Preset locale variables to speed up the build process. Limit locale
1921 # tweaks to this spot to avoid wrong language 1900 # tweaks to this spot to avoid wrong language settings when running
1922 # make menuconfig etc. 1901 # make menuconfig etc.
1923 # Error messages still appears in the origina 1902 # Error messages still appears in the original language
1924 PHONY += $(build-dir) !! 1903 PHONY += descend $(build-dirs)
1925 $(build-dir): prepare !! 1904 descend: $(build-dirs)
1926 $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1905 $(build-dirs): prepare
>> 1906 $(Q)$(MAKE) $(build)=$@ \
>> 1907 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
>> 1908 need-builtin=1 need-modorder=1
1927 1909
1928 clean-dirs := $(addprefix _clean_, $(clean-di 1910 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1929 PHONY += $(clean-dirs) clean 1911 PHONY += $(clean-dirs) clean
1930 $(clean-dirs): 1912 $(clean-dirs):
1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea 1913 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1932 1914
1933 clean: $(clean-dirs) 1915 clean: $(clean-dirs)
1934 $(call cmd,rmfiles) 1916 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1917 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name !! 1918 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ 1919 -o -name '*.ko.*' \
1938 -o -name '*.dtb' -o -name '*. !! 1920 -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1939 -o -name '*.dtb.S' -o -name ' <<
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. 1921 -o -name '*.dwo' -o -name '*.lst' \
1942 -o -name '*.su' -o -name '*.m 1922 -o -name '*.su' -o -name '*.mod' \
1943 -o -name '.*.d' -o -name '.*. 1923 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' 1924 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945 -o -name '*.asn1.[ch]' \ 1925 -o -name '*.asn1.[ch]' \
1946 -o -name '*.symtypes' -o -nam 1926 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1927 -o -name '.tmp_*.o.*' \
1947 -o -name '*.c.[012]*.*' \ 1928 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 1929 -o -name '*.ll' \
1949 -o -name '*.gcno' \ 1930 -o -name '*.gcno' \
1950 -o -name '*.*.symversions' \) !! 1931 -o -name '*.*.symversions' \) -type f -print | xargs rm -f
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 1932
1954 # Generate tags for editors 1933 # Generate tags for editors
1955 # ------------------------------------------- 1934 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 1935 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t 1936 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1958 1937
1959 tags TAGS cscope gtags: FORCE 1938 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 1939 $(call cmd,tags)
1961 1940
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1968 $(Q)$(MAKE) $(build)=rust $@ <<
1969 <<
1970 # Script to generate missing namespace depend 1941 # Script to generate missing namespace dependencies
1971 # ------------------------------------------- 1942 # ---------------------------------------------------------------------------
1972 1943
1973 PHONY += nsdeps 1944 PHONY += nsdeps
1974 nsdeps: export KBUILD_NSDEPS=1 1945 nsdeps: export KBUILD_NSDEPS=1
1975 nsdeps: modules 1946 nsdeps: modules
1976 $(Q)$(CONFIG_SHELL) $(srctree)/script 1947 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1977 1948
1978 # Clang Tooling 1949 # Clang Tooling
1979 # ------------------------------------------- 1950 # ---------------------------------------------------------------------------
1980 1951
1981 quiet_cmd_gen_compile_commands = GEN $@ 1952 quiet_cmd_gen_compile_commands = GEN $@
1982 cmd_gen_compile_commands = $(PYTHON3) $ 1953 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1983 1954
1984 $(extmod_prefix)compile_commands.json: $(srct !! 1955 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1985 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K !! 1956 $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
1986 $(if $(CONFIG_MODULES), $(MODORDER)) 1957 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1987 $(call if_changed,gen_compile_command 1958 $(call if_changed,gen_compile_commands)
1988 1959
1989 targets += $(extmod_prefix)compile_commands.j 1960 targets += $(extmod_prefix)compile_commands.json
1990 1961
1991 PHONY += clang-tidy clang-analyzer 1962 PHONY += clang-tidy clang-analyzer
1992 1963
1993 ifdef CONFIG_CC_IS_CLANG 1964 ifdef CONFIG_CC_IS_CLANG
1994 quiet_cmd_clang_tools = CHECK $< 1965 quiet_cmd_clang_tools = CHECK $<
1995 cmd_clang_tools = $(PYTHON3) $(srctree) 1966 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1996 1967
1997 clang-tidy clang-analyzer: $(extmod_prefix)co 1968 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
1998 $(call cmd,clang_tools) 1969 $(call cmd,clang_tools)
1999 else 1970 else
2000 clang-tidy clang-analyzer: 1971 clang-tidy clang-analyzer:
2001 @echo "$@ requires CC=clang" >&2 1972 @echo "$@ requires CC=clang" >&2
2002 @false 1973 @false
2003 endif 1974 endif
2004 1975
2005 # Scripts to check various things for consist 1976 # Scripts to check various things for consistency
2006 # ------------------------------------------- 1977 # ---------------------------------------------------------------------------
2007 1978
2008 PHONY += includecheck versioncheck coccicheck 1979 PHONY += includecheck versioncheck coccicheck export_report
2009 1980
2010 includecheck: 1981 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1982 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 1983 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 1984 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 1985
2015 versioncheck: 1986 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1987 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 1988 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 1989 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 1990
2020 coccicheck: 1991 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ 1992 $(Q)$(BASH) $(srctree)/scripts/$@
2022 1993
2023 export_report: 1994 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 1995 $(PERL) $(srctree)/scripts/export_report.pl
2025 1996
2026 PHONY += checkstack kernelrelease kernelversi 1997 PHONY += checkstack kernelrelease kernelversion image_name
2027 1998
2028 # UML needs a little special treatment here. 1999 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 2000 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 2001 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 2002 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 2003 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 2004 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 2005 else
2035 CHECKSTACK_ARCH := $(ARCH) 2006 CHECKSTACK_ARCH := $(ARCH)
2036 endif 2007 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 2008 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 2009 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 2010 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 2011
2042 kernelrelease: 2012 kernelrelease:
2043 @$(filechk_kernel.release) !! 2013 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044 2014
2045 kernelversion: 2015 kernelversion:
2046 @echo $(KERNELVERSION) 2016 @echo $(KERNELVERSION)
2047 2017
2048 image_name: 2018 image_name:
2049 @echo $(KBUILD_IMAGE) 2019 @echo $(KBUILD_IMAGE)
2050 <<
2051 PHONY += run-command <<
2052 run-command: <<
2053 $(Q)$(KBUILD_RUN_COMMAND) <<
2054 2020
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 2021 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) 2022 cmd_rmfiles = rm -rf $(rm-files)
2057 2023
2058 # read saved command lines for existing targe 2024 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe 2025 existing-targets := $(wildcard $(sort $(targets)))
2060 2026
2061 -include $(foreach f,$(existing-targets),$(di 2027 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062 2028
2063 endif # config-build 2029 endif # config-build
2064 endif # mixed-build 2030 endif # mixed-build
2065 endif # need-sub-make 2031 endif # need-sub-make
2066 2032
2067 PHONY += FORCE 2033 PHONY += FORCE
2068 FORCE: 2034 FORCE:
2069 2035
2070 # Declare the contents of the PHONY variable 2036 # Declare the contents of the PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 2037 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 2038 .PHONY: $(PHONY)
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