1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 !! 2 VERSION = 5
3 PATCHLEVEL = 12 !! 3 PATCHLEVEL = 13
4 SUBLEVEL = 0 !! 4 SUBLEVEL = 19
5 EXTRAVERSION = -rc7 !! 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Opossums on Parade
7 7
8 # *DOCUMENTATION* 8 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 10 # More info can be located in ./README
11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file.
13 13
14 ifeq ($(filter output-sync,$(.FEATURES)),) <<
15 $(error GNU Make >= 4.0 is required. Your Make <<
16 endif <<
17 <<
18 $(if $(filter __%, $(MAKECMDGOALS)), \ 14 $(if $(filter __%, $(MAKECMDGOALS)), \
19 $(error targets prefixed with '__' are 15 $(error targets prefixed with '__' are only for internal use))
20 16
21 # That's our default target when none is given 17 # That's our default target when none is given on the command line
22 PHONY := __all 18 PHONY := __all
23 __all: 19 __all:
24 20
25 # We are using a recursive build, so we need t 21 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 22 # to get the ordering right.
27 # 23 #
28 # Most importantly: sub-Makefiles should only 24 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 25 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 26 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 27 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 28 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 29 # after that we are sure that everything which is in that other dir
34 # is now up to date. 30 # is now up to date.
35 # 31 #
36 # The only cases where we need to modify files 32 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 33 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 34 # descending is started. They are now explicitly listed as the
39 # prepare rule. 35 # prepare rule.
40 36
41 this-makefile := $(lastword $(MAKEFILE_LIST)) <<
42 abs_srctree := $(realpath $(dir $(this-makefil <<
43 abs_objtree := $(CURDIR) <<
44 <<
45 ifneq ($(sub_make_done),1) 37 ifneq ($(sub_make_done),1)
46 38
47 # Do not use make's built-in rules and variabl 39 # Do not use make's built-in rules and variables
48 # (this increases performance and avoids hard- 40 # (this increases performance and avoids hard-to-debug behaviour)
49 MAKEFLAGS += -rR 41 MAKEFLAGS += -rR
50 42
51 # Avoid funny character set dependencies 43 # Avoid funny character set dependencies
52 unexport LC_ALL 44 unexport LC_ALL
53 LC_COLLATE=C 45 LC_COLLATE=C
54 LC_NUMERIC=C 46 LC_NUMERIC=C
55 export LC_COLLATE LC_NUMERIC 47 export LC_COLLATE LC_NUMERIC
56 48
57 # Avoid interference with shell env settings 49 # Avoid interference with shell env settings
58 unexport GREP_OPTIONS 50 unexport GREP_OPTIONS
59 51
60 # Beautify output 52 # Beautify output
61 # -------------------------------------------- 53 # ---------------------------------------------------------------------------
62 # 54 #
63 # Most of build commands in Kbuild start with !! 55 # Normally, we echo the whole command before executing it. By making
64 # "quiet_cmd_*". If defined, the short log is !! 56 # that echo $($(quiet)$(cmd)), we now have the possibility to set
65 # that command is printed by default. !! 57 # $(quiet) to choose other forms of output instead, e.g.
66 # !! 58 #
67 # e.g.) !! 59 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 60 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
69 # cmd_depmod = $(srctree)/scripts/dep !! 61 #
>> 62 # If $(quiet) is empty, the whole command will be printed.
>> 63 # If it is set to "quiet_", only the short version will be printed.
>> 64 # If it is set to "silent_", nothing will be printed at all, since
>> 65 # the variable $(silent_cmd_cc_o_c) doesn't exist.
70 # 66 #
71 # A simple variant is to prefix commands with 67 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 68 # for commands that shall be hidden in non-verbose mode.
73 # 69 #
74 # $(Q)$(MAKE) $(build)=scripts/basic !! 70 # $(Q)ln $@ :<
75 # 71 #
76 # If KBUILD_VERBOSE contains 1, the whole comm !! 72 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
77 # If KBUILD_VERBOSE contains 2, the reason for !! 73 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
>> 74 # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
78 # 75 #
79 # To put more focus on warnings, be less verbo 76 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 77 # Use 'make V=1' to see the full commands
81 78
82 ifeq ("$(origin V)", "command line") 79 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 80 KBUILD_VERBOSE = $(V)
84 endif 81 endif
>> 82 ifndef KBUILD_VERBOSE
>> 83 KBUILD_VERBOSE = 0
>> 84 endif
85 85
86 quiet = quiet_ !! 86 ifeq ($(KBUILD_VERBOSE),1)
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = 87 quiet =
91 Q = 88 Q =
>> 89 else
>> 90 quiet=quiet_
>> 91 Q = @
92 endif 92 endif
93 93
94 # If the user is running make -s (silent mode) 94 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 95 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 96
97 quiet=silent_ !! 97 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
98 override KBUILD_VERBOSE := !! 98 quiet=silent_
>> 99 KBUILD_VERBOSE = 0
99 endif 100 endif
100 101
101 export quiet Q KBUILD_VERBOSE 102 export quiet Q KBUILD_VERBOSE
102 103
103 # Call a source code checker (by default, "spa 104 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation. 105 # C compilation.
105 # 106 #
106 # Use 'make C=1' to enable checking of only re 107 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s 108 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not. 109 # of whether they are re-compiled or not.
109 # 110 #
110 # See the file "Documentation/dev-tools/sparse 111 # See the file "Documentation/dev-tools/sparse.rst" for more details,
111 # including where to get the "sparse" utility. 112 # including where to get the "sparse" utility.
112 113
113 ifeq ("$(origin C)", "command line") 114 ifeq ("$(origin C)", "command line")
114 KBUILD_CHECKSRC = $(C) 115 KBUILD_CHECKSRC = $(C)
115 endif 116 endif
116 ifndef KBUILD_CHECKSRC 117 ifndef KBUILD_CHECKSRC
117 KBUILD_CHECKSRC = 0 118 KBUILD_CHECKSRC = 0
118 endif 119 endif
119 120
120 export KBUILD_CHECKSRC 121 export KBUILD_CHECKSRC
121 122
122 # Enable "clippy" (a linter) as part of the Ru <<
123 # <<
124 # Use 'make CLIPPY=1' to enable it. <<
125 ifeq ("$(origin CLIPPY)", "command line") <<
126 KBUILD_CLIPPY := $(CLIPPY) <<
127 endif <<
128 <<
129 export KBUILD_CLIPPY <<
130 <<
131 # Use make M=dir or set the environment variab 123 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
132 # directory of external module to build. Setti 124 # directory of external module to build. Setting M= takes precedence.
133 ifeq ("$(origin M)", "command line") 125 ifeq ("$(origin M)", "command line")
134 KBUILD_EXTMOD := $(M) 126 KBUILD_EXTMOD := $(M)
135 endif 127 endif
136 128
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ 129 $(if $(word 2, $(KBUILD_EXTMOD)), \
138 $(error building multiple external mod 130 $(error building multiple external modules is not supported))
139 131
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI <<
141 $(error module directory path cannot c <<
142 <<
143 # Remove trailing slashes 132 # Remove trailing slashes
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) 133 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM 134 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
146 endif 135 endif
147 136
148 export KBUILD_EXTMOD 137 export KBUILD_EXTMOD
149 138
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif <<
156 <<
157 export KBUILD_EXTRA_WARN <<
158 <<
159 # Kbuild will save output files in the current 139 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t 140 # This does not need to match to the root of the kernel source tree.
161 # 141 #
162 # For example, you can do this: 142 # For example, you can do this:
163 # 143 #
164 # cd /dir/to/store/output/files; make -f /dir 144 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 # 145 #
166 # If you want to save output files in a differ 146 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it. 147 # two syntaxes to specify it.
168 # 148 #
169 # 1) O= 149 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 150 # Use "make O=dir/to/store/output/files/"
171 # 151 #
172 # 2) Set KBUILD_OUTPUT 152 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t 153 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil 154 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 # 155 #
176 # The O= assignment takes precedence over the 156 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 157 # variable.
178 158
179 # Do we want to change the working directory? 159 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line") 160 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 161 KBUILD_OUTPUT := $(O)
182 endif 162 endif
183 163
184 ifneq ($(KBUILD_OUTPUT),) 164 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does !! 165 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 166 # expand a shell special character '~'. We use a somewhat tedious way here.
>> 167 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
>> 168 $(if $(abs_objtree),, \
>> 169 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
>> 170
187 # $(realpath ...) resolves symlinks 171 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 172 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create !! 173 else
>> 174 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),) 175 endif # ifneq ($(KBUILD_OUTPUT),)
191 176
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 177 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 178 # Suppress "Entering directory ..." unless we are changing the work directory.
>> 179 MAKEFLAGS += --no-print-directory
>> 180 else
>> 181 need-sub-make := 1
194 endif 182 endif
195 183
196 export sub_make_done := 1 !! 184 this-makefile := $(lastword $(MAKEFILE_LIST))
>> 185 abs_srctree := $(realpath $(dir $(this-makefile)))
197 186
198 endif # sub_make_done !! 187 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
>> 188 $(error source directory cannot contain spaces or colons)
>> 189 endif
199 190
200 ifeq ($(abs_objtree),$(CURDIR)) !! 191 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are !! 192 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory !! 193 #
203 else !! 194 # This does not become effective immediately because MAKEFLAGS is re-parsed
204 # Recursion to show "Entering directory ..." !! 195 # once after the Makefile is read. We need to invoke sub-make.
>> 196 MAKEFLAGS += --include-dir=$(abs_srctree)
205 need-sub-make := 1 197 need-sub-make := 1
206 endif 198 endif
207 199
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 200 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 201 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 202 # 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 := 1 203 need-sub-make := 1
>> 204 # Cancel implicit rules for this Makefile.
>> 205 $(this-makefile): ;
213 endif 206 endif
214 207
>> 208 export abs_srctree abs_objtree
>> 209 export sub_make_done := 1
>> 210
215 ifeq ($(need-sub-make),1) 211 ifeq ($(need-sub-make),1)
216 212
217 PHONY += $(MAKECMDGOALS) __sub-make 213 PHONY += $(MAKECMDGOALS) __sub-make
218 214
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) 215 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220 @: 216 @:
221 217
222 # Invoke a second make in the output directory 218 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: 219 __sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 220 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225 -f $(abs_srctree)/Makefile $(MAKECMDGO <<
226 221
227 else # need-sub-make !! 222 endif # need-sub-make
>> 223 endif # sub_make_done
228 224
229 # We process the rest of the Makefile if this 225 # We process the rest of the Makefile if this is the final invocation of make
>> 226 ifeq ($(need-sub-make),)
>> 227
>> 228 # Do not print "Entering directory ...",
>> 229 # but we want to display it when entering to the output directory
>> 230 # so that IDEs/editors are able to understand relative filenames.
>> 231 MAKEFLAGS += --no-print-directory
230 232
231 ifeq ($(abs_srctree),$(abs_objtree)) 233 ifeq ($(abs_srctree),$(abs_objtree))
232 # building in the source tree 234 # building in the source tree
233 srctree := . 235 srctree := .
234 building_out_of_srctree := 236 building_out_of_srctree :=
235 else 237 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 238 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237 # building in a subdirectory o 239 # building in a subdirectory of the source tree
238 srctree := .. 240 srctree := ..
239 else 241 else
240 srctree := $(abs_srctree) 242 srctree := $(abs_srctree)
241 endif 243 endif
242 building_out_of_srctree := 1 244 building_out_of_srctree := 1
243 endif 245 endif
244 246
245 ifneq ($(KBUILD_ABS_SRCTREE),) 247 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree) 248 srctree := $(abs_srctree)
247 endif 249 endif
248 250
249 objtree := . 251 objtree := .
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 252 VPATH := $(srctree)
256 endif <<
257 endif <<
258 253
259 export building_out_of_srctree srctree objtree 254 export building_out_of_srctree srctree objtree VPATH
260 255
261 # To make sure we do not include .config for a 256 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 257 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 258 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 259 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 260 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 261 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 262 # of make so .config is not included in this case either (for *config).
268 263
269 version_h := include/generated/uapi/linux/vers 264 version_h := include/generated/uapi/linux/version.h
270 265
271 clean-targets := %clean mrproper cleandocs 266 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 267 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 268 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers 269 $(version_h) headers headers_% archheaders archscripts \
275 %asm-generic kernelve 270 %asm-generic kernelversion %src-pkg dt_binding_check \
276 outputmakefile rustav !! 271 outputmakefile
277 no-sync-config-targets := $(no-dot-config-targ !! 272 # Installation targets should not require compiler. Unfortunately, vdso_install
>> 273 # is an exception where build artifacts may be updated. This must be fixed.
>> 274 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
>> 275 headers_install modules_install kernelrelease image_name
>> 276 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
278 image_name 277 image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 278 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
280 279
281 config-build := 280 config-build :=
282 mixed-build := 281 mixed-build :=
283 need-config := 1 282 need-config := 1
>> 283 need-compiler := 1
284 may-sync-config := 1 284 may-sync-config := 1
285 single-build := 285 single-build :=
286 286
287 ifneq ($(filter $(no-dot-config-targets), $(MA 287 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 288 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 289 need-config :=
290 endif !! 290 endif
291 endif 291 endif
292 292
293 ifneq ($(filter $(no-sync-config-targets), $(M !! 293 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 294 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 295 need-compiler :=
296 endif !! 296 endif
297 endif 297 endif
298 298
299 need-compiler := $(may-sync-config) !! 299 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 300 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
>> 301 may-sync-config :=
>> 302 endif
>> 303 endif
300 304
301 ifneq ($(KBUILD_EXTMOD),) 305 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 306 may-sync-config :=
303 endif 307 endif
304 308
305 ifeq ($(KBUILD_EXTMOD),) 309 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 310 ifneq ($(filter %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 311 config-build := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 312 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 313 mixed-build := 1
>> 314 endif
310 endif 315 endif
311 endif <<
312 endif 316 endif
313 317
314 # We cannot build single targets and the other 318 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO 319 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 single-build := 1 !! 320 single-build := 1
317 ifneq ($(filter-out $(single-targets), $(M !! 321 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318 mixed-build := 1 !! 322 mixed-build := 1
319 endif !! 323 endif
320 endif 324 endif
321 325
322 # For "make -j clean all", "make -j mrproper d 326 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 327 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 328 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 329 mixed-build := 1
326 endif !! 330 endif
327 endif 331 endif
328 332
329 # install and modules_install need also be pro 333 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 334 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 335 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 336 mixed-build := 1
333 endif !! 337 endif
334 endif 338 endif
335 339
336 ifdef mixed-build 340 ifdef mixed-build
337 # ============================================ 341 # ===========================================================================
338 # We're called with mixed targets (*config and 342 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 343 # Handle them one by one.
340 344
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 345 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 346
343 $(MAKECMDGOALS): __build_one_by_one 347 $(MAKECMDGOALS): __build_one_by_one
344 @: 348 @:
345 349
346 __build_one_by_one: 350 __build_one_by_one:
347 $(Q)set -e; \ 351 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 352 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 353 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 354 done
351 355
352 else # !mixed-build 356 else # !mixed-build
353 357
354 include $(srctree)/scripts/Kbuild.include 358 include $(srctree)/scripts/Kbuild.include
355 359
356 # Read KERNELRELEASE from include/config/kerne 360 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 361 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 362 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 363 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 364
361 include $(srctree)/scripts/subarch.include 365 include $(srctree)/scripts/subarch.include
362 366
363 # Cross compiling and selecting different set 367 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 368 # ---------------------------------------------------------------------------
365 # 369 #
366 # When performing cross compilation for other 370 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 371 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 372 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 373 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 374 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 375 # The default ARCH is the host where make is executed.
372 376
373 # CROSS_COMPILE specify the prefix used for al 377 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 378 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 379 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 380 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 381 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 382 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 383 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 384 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 385 ARCH ?= $(SUBARCH)
382 386
383 # Architecture as present in compile.h 387 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 388 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 389 SRCARCH := $(ARCH)
386 390
387 # Additional ARCH settings for x86 391 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 392 ifeq ($(ARCH),i386)
389 SRCARCH := x86 393 SRCARCH := x86
390 endif 394 endif
391 ifeq ($(ARCH),x86_64) 395 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 396 SRCARCH := x86
393 endif 397 endif
394 398
395 # Additional ARCH settings for sparc 399 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 400 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 401 SRCARCH := sparc
398 endif 402 endif
399 ifeq ($(ARCH),sparc64) 403 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 404 SRCARCH := sparc
401 endif 405 endif
402 406
403 # Additional ARCH settings for parisc 407 # Additional ARCH settings for parisc
404 ifeq ($(ARCH),parisc64) 408 ifeq ($(ARCH),parisc64)
405 SRCARCH := parisc 409 SRCARCH := parisc
406 endif 410 endif
407 411
408 export cross_compiling := 412 export cross_compiling :=
409 ifneq ($(SRCARCH),$(SUBARCH)) 413 ifneq ($(SRCARCH),$(SUBARCH))
410 cross_compiling := 1 414 cross_compiling := 1
411 endif 415 endif
412 416
413 KCONFIG_CONFIG ?= .config 417 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 418 export KCONFIG_CONFIG
415 419
416 # SHELL used by kbuild 420 # SHELL used by kbuild
417 CONFIG_SHELL := sh 421 CONFIG_SHELL := sh
418 422
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 423 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 424 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 425 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 426
423 ifneq ($(LLVM),) 427 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),) !! 428 HOSTCC = clang
425 LLVM_PREFIX := $(LLVM) !! 429 HOSTCXX = clang++
426 else ifneq ($(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 430 else
433 HOSTCC = gcc 431 HOSTCC = gcc
434 HOSTCXX = g++ 432 HOSTCXX = g++
435 endif 433 endif
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config <<
438 434
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 435 export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440 -O2 -fomit-frame-poin !! 436 -O2 -fomit-frame-pointer -std=gnu89
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) !! 437 export KBUILD_USERLDFLAGS :=
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) !! 438
443 !! 439 KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
444 # These flags apply to all Rust code in the tr !! 440 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 441 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 442 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 443
471 # Make variables (CC, etc...) 444 # Make variables (CC, etc...)
472 CPP = $(CC) -E 445 CPP = $(CC) -E
473 ifneq ($(LLVM),) 446 ifneq ($(LLVM),)
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU !! 447 CC = clang
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S !! 448 LD = ld.lld
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ !! 449 AR = llvm-ar
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ !! 450 NM = llvm-nm
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( !! 451 OBJCOPY = llvm-objcopy
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( !! 452 OBJDUMP = llvm-objdump
480 READELF = $(LLVM_PREFIX)llvm-readelf$( !! 453 READELF = llvm-readelf
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL !! 454 STRIP = llvm-strip
482 else 455 else
483 CC = $(CROSS_COMPILE)gcc 456 CC = $(CROSS_COMPILE)gcc
484 LD = $(CROSS_COMPILE)ld 457 LD = $(CROSS_COMPILE)ld
485 AR = $(CROSS_COMPILE)ar 458 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 459 NM = $(CROSS_COMPILE)nm
487 OBJCOPY = $(CROSS_COMPILE)objcopy 460 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 461 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf 462 READELF = $(CROSS_COMPILE)readelf
490 STRIP = $(CROSS_COMPILE)strip 463 STRIP = $(CROSS_COMPILE)strip
491 endif 464 endif
492 RUSTC = rustc <<
493 RUSTDOC = rustdoc <<
494 RUSTFMT = rustfmt <<
495 CLIPPY_DRIVER = clippy-driver <<
496 BINDGEN = bindgen <<
497 PAHOLE = pahole 465 PAHOLE = pahole
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve 466 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX = flex 467 LEX = flex
500 YACC = bison 468 YACC = bison
501 AWK = awk 469 AWK = awk
502 INSTALLKERNEL := installkernel 470 INSTALLKERNEL := installkernel
>> 471 DEPMOD = depmod
503 PERL = perl 472 PERL = perl
504 PYTHON3 = python3 473 PYTHON3 = python3
505 CHECK = sparse 474 CHECK = sparse
506 BASH = bash 475 BASH = bash
507 KGZIP = gzip 476 KGZIP = gzip
508 KBZIP2 = bzip2 477 KBZIP2 = bzip2
509 KLZOP = lzop 478 KLZOP = lzop
510 LZMA = lzma 479 LZMA = lzma
511 LZ4 = lz4c 480 LZ4 = lz4c
512 XZ = xz 481 XZ = xz
513 ZSTD = zstd 482 ZSTD = zstd
514 483
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 484 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 485 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := 486 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE = 487 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 488 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 489 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 490 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 491 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 492 LDFLAGS_vmlinux =
526 493
527 # Use USERINCLUDE when you must reference the 494 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 495 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 496 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 497 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 498 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 499 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li 500 -include $(srctree)/include/linux/compiler-version.h \
534 -include $(srctree)/include/li 501 -include $(srctree)/include/linux/kconfig.h
535 502
536 # Use LINUXINCLUDE when you must reference the 503 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 504 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 505 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 506 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 507 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree 508 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542 -I$(objtree)/include \ 509 -I$(objtree)/include \
543 $(USERINCLUDE) 510 $(USERINCLUDE)
544 511
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 512 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 !! 513 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS := !! 514 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11 !! 515 -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar !! 516 -Werror=return-type -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char !! 517 -std=gnu89
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 518 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ <<
557 -Cpanic=abort -Cembed-bitc <<
558 -Cforce-unwind-tables=n -C <<
559 -Csymbol-mangling-version= <<
560 -Crelocation-model=static <<
561 -Zfunction-sections=n \ <<
562 -Wclippy::float_arithmetic <<
563 <<
564 KBUILD_AFLAGS_KERNEL := 519 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 520 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 521 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 522 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE <<
570 KBUILD_LDFLAGS_MODULE := 523 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS := 524 KBUILD_LDFLAGS :=
572 CLANG_FLAGS := 525 CLANG_FLAGS :=
573 526
574 ifeq ($(KBUILD_CLIPPY),1) !! 527 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
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 # Allows the usage of unstable features in sta <<
583 export RUSTC_BOOTSTRAP := 1 <<
584 <<
585 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K <<
586 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q <<
587 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS <<
588 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF 528 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
589 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ 529 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
590 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 530 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
591 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 531 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
592 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS <<
593 532
594 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 533 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
595 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 534 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
596 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF <<
597 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 535 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
598 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 536 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
599 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 537 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
600 538
601 # Files to ignore in find ... statements 539 # Files to ignore in find ... statements
602 540
603 export RCS_FIND_IGNORE := \( -name SCCS -o -na 541 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
604 -name CVS -o -name . 542 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
605 -prune -o 543 -prune -o
>> 544 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 545 --exclude CVS --exclude .pc --exclude .hg --exclude .git
606 546
607 # ============================================ 547 # ===========================================================================
608 # Rules shared between *config targets and bui 548 # Rules shared between *config targets and build targets
609 549
610 # Basic helpers built in scripts/basic/ 550 # Basic helpers built in scripts/basic/
611 PHONY += scripts_basic 551 PHONY += scripts_basic
612 scripts_basic: 552 scripts_basic:
613 $(Q)$(MAKE) $(build)=scripts/basic 553 $(Q)$(MAKE) $(build)=scripts/basic
>> 554 $(Q)rm -f .tmp_quiet_recordmcount
614 555
615 PHONY += outputmakefile 556 PHONY += outputmakefile
616 ifdef building_out_of_srctree <<
617 # Before starting out-of-tree build, make sure 557 # Before starting out-of-tree build, make sure the source tree is clean.
618 # outputmakefile generates a Makefile in the o 558 # outputmakefile generates a Makefile in the output directory, if using a
619 # separate output directory. This allows conve 559 # separate output directory. This allows convenient use of make in the
620 # output directory. 560 # output directory.
621 # At the same time when output Makefile genera 561 # At the same time when output Makefile generated, generate .gitignore to
622 # ignore whole output directory 562 # ignore whole output directory
623 <<
624 quiet_cmd_makefile = GEN Makefile <<
625 cmd_makefile = { \ <<
626 echo "\# Automatically generated by $( <<
627 echo "include $(srctree)/Makefile"; \ <<
628 } > Makefile <<
629 <<
630 outputmakefile: 563 outputmakefile:
631 @if [ -f $(srctree)/.config -o \ !! 564 ifdef building_out_of_srctree
>> 565 $(Q)if [ -f $(srctree)/.config -o \
632 -d $(srctree)/include/config 566 -d $(srctree)/include/config -o \
633 -d $(srctree)/arch/$(SRCARCH) 567 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
634 echo >&2 "***"; \ 568 echo >&2 "***"; \
635 echo >&2 "*** The source tree 569 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
636 echo >&2 "*** in $(abs_srctree 570 echo >&2 "*** in $(abs_srctree)";\
637 echo >&2 "***"; \ 571 echo >&2 "***"; \
638 false; \ 572 false; \
639 fi 573 fi
640 $(Q)ln -fsn $(srctree) source 574 $(Q)ln -fsn $(srctree) source
641 $(call cmd,makefile) !! 575 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
642 $(Q)test -e .gitignore || \ 576 $(Q)test -e .gitignore || \
643 { echo "# this is build directory, ign 577 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
644 endif 578 endif
645 579
646 # The expansion should be delayed until arch/$ 580 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
647 # Some architectures define CROSS_COMPILE in a 581 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
648 # CC_VERSION_TEXT and RUSTC_VERSION_TEXT are r !! 582 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
649 # need export), and from include/config/auto.c !! 583 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
650 # upgrade. !! 584 CC_VERSION_TEXT = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1))
651 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC <<
652 RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell <<
653 585
654 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), 586 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
655 include $(srctree)/scripts/Makefile.clang !! 587 ifneq ($(CROSS_COMPILE),)
>> 588 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
>> 589 endif
>> 590 ifeq ($(LLVM_IAS),1)
>> 591 CLANG_FLAGS += -integrated-as
>> 592 else
>> 593 CLANG_FLAGS += -no-integrated-as
>> 594 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
>> 595 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
>> 596 endif
>> 597 CLANG_FLAGS += -Werror=unknown-warning-option
>> 598 KBUILD_CFLAGS += $(CLANG_FLAGS)
>> 599 KBUILD_AFLAGS += $(CLANG_FLAGS)
>> 600 export CLANG_FLAGS
656 endif 601 endif
657 602
658 # Include this also for config targets because 603 # Include this also for config targets because some architectures need
659 # cc-cross-prefix to determine CROSS_COMPILE. 604 # cc-cross-prefix to determine CROSS_COMPILE.
660 ifdef need-compiler 605 ifdef need-compiler
661 include $(srctree)/scripts/Makefile.compiler 606 include $(srctree)/scripts/Makefile.compiler
662 endif 607 endif
663 608
664 ifdef config-build 609 ifdef config-build
665 # ============================================ 610 # ===========================================================================
666 # *config targets only - make sure prerequisit 611 # *config targets only - make sure prerequisites are updated, and descend
667 # in scripts/kconfig to make the *config targe 612 # in scripts/kconfig to make the *config target
668 613
669 # Read arch-specific Makefile to set KBUILD_DE !! 614 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
670 # KBUILD_DEFCONFIG may point out an alternativ 615 # KBUILD_DEFCONFIG may point out an alternative default configuration
671 # used for 'make defconfig' 616 # used for 'make defconfig'
672 include $(srctree)/arch/$(SRCARCH)/Makefile 617 include $(srctree)/arch/$(SRCARCH)/Makefile
673 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 618 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
674 619
675 config: outputmakefile scripts_basic FORCE 620 config: outputmakefile scripts_basic FORCE
676 $(Q)$(MAKE) $(build)=scripts/kconfig $ 621 $(Q)$(MAKE) $(build)=scripts/kconfig $@
677 622
678 %config: outputmakefile scripts_basic FORCE 623 %config: outputmakefile scripts_basic FORCE
679 $(Q)$(MAKE) $(build)=scripts/kconfig $ 624 $(Q)$(MAKE) $(build)=scripts/kconfig $@
680 625
681 else #!config-build 626 else #!config-build
682 # ============================================ 627 # ===========================================================================
683 # Build targets only - this includes vmlinux, !! 628 # Build targets only - this includes vmlinux, arch specific targets, clean
684 # targets and others. In general all targets e 629 # targets and others. In general all targets except *config targets.
685 630
686 # If building an external module we do not car 631 # If building an external module we do not care about the all: rule
687 # but instead __all depend on modules 632 # but instead __all depend on modules
688 PHONY += all 633 PHONY += all
689 ifeq ($(KBUILD_EXTMOD),) 634 ifeq ($(KBUILD_EXTMOD),)
690 __all: all 635 __all: all
691 else 636 else
692 __all: modules 637 __all: modules
693 endif 638 endif
694 639
695 targets := <<
696 <<
697 # Decide whether to build built-in, modular, o 640 # Decide whether to build built-in, modular, or both.
698 # Normally, just do built-in. 641 # Normally, just do built-in.
699 642
700 KBUILD_MODULES := 643 KBUILD_MODULES :=
701 KBUILD_BUILTIN := 1 644 KBUILD_BUILTIN := 1
702 645
703 # If we have only "make modules", don't compil 646 # If we have only "make modules", don't compile built-in objects.
704 ifeq ($(MAKECMDGOALS),modules) 647 ifeq ($(MAKECMDGOALS),modules)
705 KBUILD_BUILTIN := 648 KBUILD_BUILTIN :=
706 endif 649 endif
707 650
708 # If we have "make <whatever> modules", compil 651 # If we have "make <whatever> modules", compile modules
709 # in addition to whatever we do anyway. 652 # in addition to whatever we do anyway.
710 # Just "make" or "make all" shall build module 653 # Just "make" or "make all" shall build modules as well
711 654
712 ifneq ($(filter all modules nsdeps %compile_co 655 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
713 KBUILD_MODULES := 1 656 KBUILD_MODULES := 1
714 endif 657 endif
715 658
716 ifeq ($(MAKECMDGOALS),) 659 ifeq ($(MAKECMDGOALS),)
717 KBUILD_MODULES := 1 660 KBUILD_MODULES := 1
718 endif 661 endif
719 662
720 export KBUILD_MODULES KBUILD_BUILTIN 663 export KBUILD_MODULES KBUILD_BUILTIN
721 664
722 ifdef need-config 665 ifdef need-config
723 include include/config/auto.conf 666 include include/config/auto.conf
724 endif 667 endif
725 668
726 ifeq ($(KBUILD_EXTMOD),) 669 ifeq ($(KBUILD_EXTMOD),)
727 # Objects we will link into vmlinux / subdirs 670 # Objects we will link into vmlinux / subdirs we need to visit
728 core-y := !! 671 core-y := init/ usr/
729 drivers-y := !! 672 drivers-y := drivers/ sound/
>> 673 drivers-$(CONFIG_SAMPLES) += samples/
>> 674 drivers-$(CONFIG_NET) += net/
>> 675 drivers-y += virt/
730 libs-y := lib/ 676 libs-y := lib/
731 endif # KBUILD_EXTMOD 677 endif # KBUILD_EXTMOD
732 678
733 # The all: target is the default when no targe 679 # The all: target is the default when no target is given on the
734 # command line. 680 # command line.
735 # This allow a user to issue only 'make' to bu 681 # This allow a user to issue only 'make' to build a kernel including modules
736 # Defaults to vmlinux, but the arch makefile u 682 # Defaults to vmlinux, but the arch makefile usually adds further targets
737 all: vmlinux 683 all: vmlinux
738 684
739 CFLAGS_GCOV := -fprofile-arcs -ftest-cover !! 685 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
740 ifdef CONFIG_CC_IS_GCC !! 686 $(call cc-option,-fno-tree-loop-im) \
741 CFLAGS_GCOV += -fno-tree-loop-im !! 687 $(call cc-disable-warning,maybe-uninitialized,)
742 endif <<
743 export CFLAGS_GCOV 688 export CFLAGS_GCOV
744 689
745 # The arch Makefiles can override CC_FLAGS_FTR 690 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
746 ifdef CONFIG_FUNCTION_TRACER 691 ifdef CONFIG_FUNCTION_TRACER
747 CC_FLAGS_FTRACE := -pg 692 CC_FLAGS_FTRACE := -pg
748 endif 693 endif
749 694
>> 695 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
>> 696 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
>> 697 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
>> 698 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
>> 699 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
>> 700 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
>> 701 export RETPOLINE_CFLAGS
>> 702 export RETPOLINE_VDSO_CFLAGS
>> 703
750 include $(srctree)/arch/$(SRCARCH)/Makefile 704 include $(srctree)/arch/$(SRCARCH)/Makefile
751 705
752 ifdef need-config 706 ifdef need-config
753 ifdef may-sync-config 707 ifdef may-sync-config
754 # Read in dependencies to all Kconfig* files, 708 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
755 # changes are detected. This should be include 709 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
756 # because some architectures define CROSS_COMP 710 # because some architectures define CROSS_COMPILE there.
757 include include/config/auto.conf.cmd 711 include include/config/auto.conf.cmd
758 712
759 $(KCONFIG_CONFIG): 713 $(KCONFIG_CONFIG):
760 @echo >&2 '***' 714 @echo >&2 '***'
761 @echo >&2 '*** Configuration file "$@" 715 @echo >&2 '*** Configuration file "$@" not found!'
762 @echo >&2 '***' 716 @echo >&2 '***'
763 @echo >&2 '*** Please run some configu 717 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
764 @echo >&2 '*** "make menuconfig" or "m 718 @echo >&2 '*** "make menuconfig" or "make xconfig").'
765 @echo >&2 '***' 719 @echo >&2 '***'
766 @/bin/false 720 @/bin/false
767 721
768 # The actual configuration files used during t 722 # The actual configuration files used during the build are stored in
769 # include/generated/ and include/config/. Upda 723 # include/generated/ and include/config/. Update them if .config is newer than
770 # include/config/auto.conf (which mirrors .con 724 # include/config/auto.conf (which mirrors .config).
771 # 725 #
772 # This exploits the 'multi-target pattern rule 726 # This exploits the 'multi-target pattern rule' trick.
773 # The syncconfig should be executed only once 727 # The syncconfig should be executed only once to make all the targets.
774 # (Note: use the grouped target '&:' when we b 728 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
775 # 729 #
776 # Do not use $(call cmd,...) here. That would 730 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
777 # so you cannot notice that Kconfig is waiting 731 # so you cannot notice that Kconfig is waiting for the user input.
778 %/config/auto.conf %/config/auto.conf.cmd %/ge !! 732 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
779 $(Q)$(kecho) " SYNC $@" 733 $(Q)$(kecho) " SYNC $@"
780 $(Q)$(MAKE) -f $(srctree)/Makefile syn 734 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
781 else # !may-sync-config 735 else # !may-sync-config
782 # External modules and some install targets ne 736 # External modules and some install targets need include/generated/autoconf.h
783 # and include/config/auto.conf but do not care 737 # and include/config/auto.conf but do not care if they are up-to-date.
784 # Use auto.conf to trigger the test 738 # Use auto.conf to trigger the test
785 PHONY += include/config/auto.conf 739 PHONY += include/config/auto.conf
786 740
787 include/config/auto.conf: 741 include/config/auto.conf:
788 @test -e include/generated/autoconf.h !! 742 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
789 echo >&2; 743 echo >&2; \
790 echo >&2 " ERROR: Kernel configuratio 744 echo >&2 " ERROR: Kernel configuration is invalid."; \
791 echo >&2 " include/generated/a 745 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
792 echo >&2 " Run 'make oldconfig 746 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
793 echo >&2 ; 747 echo >&2 ; \
794 /bin/false) 748 /bin/false)
795 749
796 endif # may-sync-config 750 endif # may-sync-config
797 endif # need-config 751 endif # need-config
798 752
799 KBUILD_CFLAGS += -fno-delete-null-pointer-ch !! 753 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
>> 754 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 755 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 756 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 757 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
800 758
801 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 759 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
802 KBUILD_CFLAGS += -O2 760 KBUILD_CFLAGS += -O2
803 KBUILD_RUSTFLAGS += -Copt-level=2 !! 761 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
>> 762 KBUILD_CFLAGS += -O3
804 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 763 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
805 KBUILD_CFLAGS += -Os 764 KBUILD_CFLAGS += -Os
806 KBUILD_RUSTFLAGS += -Copt-level=s <<
807 endif 765 endif
808 766
809 # Always set `debug-assertions` and `overflow- <<
810 # depends on `opt-level` and `debug-assertions <<
811 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( <<
812 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C <<
813 <<
814 # Tell gcc to never replace conditional load w 767 # Tell gcc to never replace conditional load with a non-conditional one
815 ifdef CONFIG_CC_IS_GCC <<
816 # gcc-10 renamed --param=allow-store-data-race <<
817 # -fno-allow-store-data-races. <<
818 KBUILD_CFLAGS += $(call cc-option,--param=al 768 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
819 KBUILD_CFLAGS += $(call cc-option,-fno-allow 769 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
820 endif <<
821 770
822 ifdef CONFIG_READABLE_ASM 771 ifdef CONFIG_READABLE_ASM
823 # Disable optimizations that make assembler li 772 # Disable optimizations that make assembler listings hard to read.
824 # reorder blocks reorders the control in the f 773 # reorder blocks reorders the control in the function
825 # ipa clone creates specialized cloned functio 774 # ipa clone creates specialized cloned functions
826 # partial inlining inlines only parts of funct 775 # partial inlining inlines only parts of functions
827 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 776 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
>> 777 $(call cc-option,-fno-ipa-cp-clone,) \
>> 778 $(call cc-option,-fno-partial-inlining)
>> 779 endif
>> 780
>> 781 ifneq ($(CONFIG_FRAME_WARN),0)
>> 782 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
828 endif 783 endif
829 784
830 stackp-flags-y 785 stackp-flags-y := -fno-stack-protector
831 stackp-flags-$(CONFIG_STACKPROTECTOR) 786 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
832 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 787 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
833 788
834 KBUILD_CFLAGS += $(stackp-flags-y) 789 KBUILD_CFLAGS += $(stackp-flags-y)
835 790
836 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 791 ifdef CONFIG_CC_IS_CLANG
837 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 792 KBUILD_CPPFLAGS += -Qunused-arguments
>> 793 KBUILD_CFLAGS += -Wno-format-invalid-specifier
>> 794 KBUILD_CFLAGS += -Wno-gnu
>> 795 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
>> 796 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>> 797 # See modpost pattern 2
>> 798 KBUILD_CFLAGS += -mno-global-merge
>> 799 else
838 800
>> 801 # Warn about unmarked fall-throughs in switch statement.
>> 802 # Disabled for clang while comment to attribute conversion happens and
>> 803 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
>> 804 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
>> 805 endif
>> 806
>> 807 # These warnings generated too much noise in a regular build.
>> 808 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 809 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
>> 810
>> 811 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
839 ifdef CONFIG_FRAME_POINTER 812 ifdef CONFIG_FRAME_POINTER
840 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 813 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
841 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
842 else 814 else
843 # Some targets (ARM with Thumb2, for example), 815 # Some targets (ARM with Thumb2, for example), can't be built with frame
844 # pointers. For those, we don't have FUNCTION 816 # pointers. For those, we don't have FUNCTION_TRACER automatically
845 # select FRAME_POINTER. However, FUNCTION_TRA 817 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
846 # incompatible with -fomit-frame-pointer with 818 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
847 # -fomit-frame-pointer with FUNCTION_TRACER. 819 # -fomit-frame-pointer with FUNCTION_TRACER.
848 # In the Rust target specification, "frame-poi <<
849 # to "may-omit". <<
850 ifndef CONFIG_FUNCTION_TRACER 820 ifndef CONFIG_FUNCTION_TRACER
851 KBUILD_CFLAGS += -fomit-frame-pointer 821 KBUILD_CFLAGS += -fomit-frame-pointer
852 endif 822 endif
853 endif 823 endif
854 824
855 # Initialize all stack variables with a 0xAA p 825 # Initialize all stack variables with a 0xAA pattern.
856 ifdef CONFIG_INIT_STACK_ALL_PATTERN 826 ifdef CONFIG_INIT_STACK_ALL_PATTERN
857 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 827 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
858 endif 828 endif
859 829
860 # Initialize all stack variables with a zero v 830 # Initialize all stack variables with a zero value.
861 ifdef CONFIG_INIT_STACK_ALL_ZERO 831 ifdef CONFIG_INIT_STACK_ALL_ZERO
>> 832 # Future support for zero initialization is still being debated, see
>> 833 # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
>> 834 # renamed or dropped.
862 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer 835 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
863 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 836 KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
864 # https://github.com/llvm/llvm-project/issues/ <<
865 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi <<
866 export CC_AUTO_VAR_INIT_ZERO_ENABLER <<
867 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA <<
868 endif <<
869 endif 837 endif
870 838
871 # While VLAs have been removed, GCC produces u 839 # While VLAs have been removed, GCC produces unreachable stack probes
872 # for the randomize_kstack_offset feature. Dis 840 # for the randomize_kstack_offset feature. Disable it for all compilers.
873 KBUILD_CFLAGS += $(call cc-option, -fno-stac 841 KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
874 842
875 # Clear used registers at func exit (to reduce !! 843 DEBUG_CFLAGS :=
876 ifdef CONFIG_ZERO_CALL_USED_REGS !! 844
877 KBUILD_CFLAGS += -fzero-call-used-regs=used- !! 845 # Workaround for GCC versions < 5.0
>> 846 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
>> 847 ifdef CONFIG_CC_IS_GCC
>> 848 DEBUG_CFLAGS += $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
>> 849 endif
>> 850
>> 851 ifdef CONFIG_DEBUG_INFO
>> 852
>> 853 ifdef CONFIG_DEBUG_INFO_SPLIT
>> 854 DEBUG_CFLAGS += -gsplit-dwarf
>> 855 else
>> 856 DEBUG_CFLAGS += -g
>> 857 endif
>> 858
>> 859 ifneq ($(LLVM_IAS),1)
>> 860 KBUILD_AFLAGS += -Wa,-gdwarf-2
>> 861 endif
>> 862
>> 863 ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
>> 864 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
>> 865 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
>> 866 DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y)
>> 867 endif
>> 868
>> 869 ifdef CONFIG_DEBUG_INFO_REDUCED
>> 870 DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
>> 871 $(call cc-option,-fno-var-tracking)
>> 872 endif
>> 873
>> 874 ifdef CONFIG_DEBUG_INFO_COMPRESSED
>> 875 DEBUG_CFLAGS += -gz=zlib
>> 876 KBUILD_AFLAGS += -gz=zlib
>> 877 KBUILD_LDFLAGS += --compress-debug-sections=zlib
878 endif 878 endif
879 879
>> 880 endif # CONFIG_DEBUG_INFO
>> 881
>> 882 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
>> 883 export DEBUG_CFLAGS
>> 884
880 ifdef CONFIG_FUNCTION_TRACER 885 ifdef CONFIG_FUNCTION_TRACER
881 ifdef CONFIG_FTRACE_MCOUNT_USE_CC 886 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
882 CC_FLAGS_FTRACE += -mrecord-mcount 887 CC_FLAGS_FTRACE += -mrecord-mcount
883 ifdef CONFIG_HAVE_NOP_MCOUNT 888 ifdef CONFIG_HAVE_NOP_MCOUNT
884 ifeq ($(call cc-option-yn, -mnop-mcount),y 889 ifeq ($(call cc-option-yn, -mnop-mcount),y)
885 CC_FLAGS_FTRACE += -mnop-mcount 890 CC_FLAGS_FTRACE += -mnop-mcount
886 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 891 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
887 endif 892 endif
888 endif 893 endif
889 endif 894 endif
890 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL 895 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
891 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT !! 896 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
892 CC_FLAGS_USING += -DCC_USING_NOP_MCOU <<
893 endif <<
894 endif 897 endif
895 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT 898 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
896 ifdef CONFIG_HAVE_C_RECORDMCOUNT 899 ifdef CONFIG_HAVE_C_RECORDMCOUNT
897 BUILD_C_RECORDMCOUNT := y 900 BUILD_C_RECORDMCOUNT := y
898 export BUILD_C_RECORDMCOUNT 901 export BUILD_C_RECORDMCOUNT
899 endif 902 endif
900 endif 903 endif
901 ifdef CONFIG_HAVE_FENTRY 904 ifdef CONFIG_HAVE_FENTRY
902 # s390-linux-gnu-gcc did not support -mfentr <<
903 ifeq ($(call cc-option-yn, -mfentry),y) 905 ifeq ($(call cc-option-yn, -mfentry),y)
904 CC_FLAGS_FTRACE += -mfentry 906 CC_FLAGS_FTRACE += -mfentry
905 CC_FLAGS_USING += -DCC_USING_FENTRY 907 CC_FLAGS_USING += -DCC_USING_FENTRY
906 endif 908 endif
907 endif 909 endif
908 export CC_FLAGS_FTRACE 910 export CC_FLAGS_FTRACE
909 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
910 KBUILD_AFLAGS += $(CC_FLAGS_USING) 912 KBUILD_AFLAGS += $(CC_FLAGS_USING)
911 endif 913 endif
912 914
913 # We trigger additional mismatches with less i 915 # We trigger additional mismatches with less inlining
914 ifdef CONFIG_DEBUG_SECTION_MISMATCH 916 ifdef CONFIG_DEBUG_SECTION_MISMATCH
915 KBUILD_CFLAGS += -fno-inline-functions-called- !! 917 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
916 endif 918 endif
917 919
918 # `rustc`'s `-Zfunction-sections` applies to d <<
919 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 920 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
920 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 921 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
921 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
922 LDFLAGS_vmlinux += --gc-sections 922 LDFLAGS_vmlinux += --gc-sections
923 endif 923 endif
924 924
925 ifdef CONFIG_SHADOW_CALL_STACK 925 ifdef CONFIG_SHADOW_CALL_STACK
926 ifndef CONFIG_DYNAMIC_SCS <<
927 CC_FLAGS_SCS := -fsanitize=shadow-call-stac 926 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
928 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 927 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
929 KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-st <<
930 endif <<
931 export CC_FLAGS_SCS 928 export CC_FLAGS_SCS
932 endif 929 endif
933 930
934 ifdef CONFIG_LTO_CLANG 931 ifdef CONFIG_LTO_CLANG
935 ifdef CONFIG_LTO_CLANG_THIN 932 ifdef CONFIG_LTO_CLANG_THIN
936 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit 933 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
>> 934 KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
937 else 935 else
938 CC_FLAGS_LTO := -flto 936 CC_FLAGS_LTO := -flto
939 endif 937 endif
940 CC_FLAGS_LTO += -fvisibility=hidden 938 CC_FLAGS_LTO += -fvisibility=hidden
941 939
942 # Limit inlining across translation units to r 940 # Limit inlining across translation units to reduce binary size
943 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 941 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
>> 942
>> 943 # Check for frame size exceeding threshold during prolog/epilog insertion
>> 944 # when using lld < 13.0.0.
>> 945 ifneq ($(CONFIG_FRAME_WARN),0)
>> 946 ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
>> 947 KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
>> 948 endif
>> 949 endif
944 endif 950 endif
945 951
946 ifdef CONFIG_LTO 952 ifdef CONFIG_LTO
947 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) 953 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
948 KBUILD_AFLAGS += -fno-lto 954 KBUILD_AFLAGS += -fno-lto
949 export CC_FLAGS_LTO 955 export CC_FLAGS_LTO
950 endif 956 endif
951 957
952 ifdef CONFIG_CFI_CLANG 958 ifdef CONFIG_CFI_CLANG
953 CC_FLAGS_CFI := -fsanitize=kcfi !! 959 CC_FLAGS_CFI := -fsanitize=cfi \
954 ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS !! 960 -fsanitize-cfi-cross-dso \
955 CC_FLAGS_CFI += -fsanitize-cfi-ical !! 961 -fno-sanitize-cfi-canonical-jump-tables \
956 endif !! 962 -fno-sanitize-trap=cfi \
957 ifdef CONFIG_RUST !! 963 -fno-sanitize-blacklist
958 # Always pass -Zsanitizer-cfi-normaliz !! 964
959 # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. !! 965 ifdef CONFIG_CFI_PERMISSIVE
960 RUSTC_FLAGS_CFI := -Zsanitizer=kcfi !! 966 CC_FLAGS_CFI += -fsanitize-recover=cfi
961 KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) <<
962 export RUSTC_FLAGS_CFI <<
963 endif 967 endif
>> 968
>> 969 # If LTO flags are filtered out, we must also filter out CFI.
>> 970 CC_FLAGS_LTO += $(CC_FLAGS_CFI)
964 KBUILD_CFLAGS += $(CC_FLAGS_CFI) 971 KBUILD_CFLAGS += $(CC_FLAGS_CFI)
965 export CC_FLAGS_CFI 972 export CC_FLAGS_CFI
966 endif 973 endif
967 974
968 # Architectures can define flags to add/remove !! 975 ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
969 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 976 KBUILD_CFLAGS += -falign-functions=32
970 export CC_FLAGS_FPU <<
971 export CC_FLAGS_NO_FPU <<
972 <<
973 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) <<
974 # Set the minimal function alignment. Use the <<
975 # -fmin-function-alignment if it is available, <<
976 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
977 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
978 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
979 else <<
980 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
981 endif <<
982 endif 977 endif
983 978
984 # arch Makefile may override CC so keep this a 979 # arch Makefile may override CC so keep this after arch Makefile is included
985 NOSTDINC_FLAGS += -nostdinc !! 980 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
986 981
987 # To gain proper coverage for CONFIG_UBSAN_BOU !! 982 # warn about C99 declaration after statement
988 # the kernel uses only C99 flexible arrays for !! 983 KBUILD_CFLAGS += -Wdeclaration-after-statement
989 # arrays. Enforce this for everything that may !! 984
990 # perform bounds checking. !! 985 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
991 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl !! 986 KBUILD_CFLAGS += -Wvla
992 !! 987
993 #Currently, disable -Wstringop-overflow for GC !! 988 # disable pointer signed / unsigned warnings in gcc 4.0
994 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW !! 989 KBUILD_CFLAGS += -Wno-pointer-sign
995 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + !! 990
>> 991 # disable stringop warnings in gcc 8+
>> 992 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
>> 993
>> 994 # We'll want to enable this eventually, but it's not going away for 5.7 at least
>> 995 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
>> 996 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
>> 997 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
>> 998
>> 999 # Another good warning that we'll want to enable eventually
>> 1000 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
>> 1001
>> 1002 # Enabled with W=2, disabled by default as noisy
>> 1003 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
996 1004
997 # disable invalid "can't wrap" optimizations f 1005 # disable invalid "can't wrap" optimizations for signed / pointers
998 KBUILD_CFLAGS += -fno-strict-overflow 1006 KBUILD_CFLAGS += -fno-strict-overflow
999 1007
1000 # Make sure -fstack-check isn't enabled (like 1008 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
1001 KBUILD_CFLAGS += -fno-stack-check 1009 KBUILD_CFLAGS += -fno-stack-check
1002 1010
1003 # conserve stack if available 1011 # conserve stack if available
1004 ifdef CONFIG_CC_IS_GCC !! 1012 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
1005 KBUILD_CFLAGS += -fconserve-stack !! 1013
1006 endif !! 1014 # Prohibit date/time macros, which would make the build non-deterministic
>> 1015 KBUILD_CFLAGS += -Werror=date-time
>> 1016
>> 1017 # enforce correct pointer usage
>> 1018 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>> 1019
>> 1020 # Require designated initializers for all marked structures
>> 1021 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
1007 1022
1008 # change __FILE__ to the relative path from t 1023 # change __FILE__ to the relative path from the srctree
1009 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p 1024 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1010 1025
1011 # include additional Makefiles when needed 1026 # include additional Makefiles when needed
1012 include-y := scripts/Ma 1027 include-y := scripts/Makefile.extrawarn
1013 include-$(CONFIG_DEBUG_INFO) += scripts/Ma <<
1014 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma <<
1015 include-$(CONFIG_KASAN) += scripts/Ma 1028 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
1016 include-$(CONFIG_KCSAN) += scripts/Ma 1029 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
1017 include-$(CONFIG_KMSAN) += scripts/Ma <<
1018 include-$(CONFIG_UBSAN) += scripts/Ma 1030 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
1019 include-$(CONFIG_KCOV) += scripts/Ma 1031 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
1020 include-$(CONFIG_RANDSTRUCT) += scripts/Ma <<
1021 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma 1032 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
1022 1033
1023 include $(addprefix $(srctree)/, $(include-y) 1034 include $(addprefix $(srctree)/, $(include-y))
1024 1035
1025 # scripts/Makefile.gcc-plugins is intentional 1036 # scripts/Makefile.gcc-plugins is intentionally included last.
1026 # Do not add $(call cc-option,...) below this 1037 # Do not add $(call cc-option,...) below this line. When you build the kernel
1027 # from the clean source tree, the GCC plugins 1038 # from the clean source tree, the GCC plugins do not exist at this point.
1028 1039
1029 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS !! 1040 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1030 KBUILD_CPPFLAGS += $(KCPPFLAGS) 1041 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1031 KBUILD_AFLAGS += $(KAFLAGS) 1042 KBUILD_AFLAGS += $(KAFLAGS)
1032 KBUILD_CFLAGS += $(KCFLAGS) 1043 KBUILD_CFLAGS += $(KCFLAGS)
1033 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) <<
1034 1044
1035 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1045 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1036 LDFLAGS_vmlinux += --build-id=sha1 1046 LDFLAGS_vmlinux += --build-id=sha1
1037 1047
1038 KBUILD_LDFLAGS += -z noexecstack <<
1039 ifeq ($(CONFIG_LD_IS_BFD),y) <<
1040 KBUILD_LDFLAGS += $(call ld-option,--no-warn <<
1041 endif <<
1042 <<
1043 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1048 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1044 LDFLAGS_vmlinux += -X !! 1049 LDFLAGS_vmlinux += $(call ld-option, -X,)
1045 endif 1050 endif
1046 1051
1047 ifeq ($(CONFIG_RELR),y) 1052 ifeq ($(CONFIG_RELR),y)
1048 # ld.lld before 15 did not support -z pack-re !! 1053 LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
1049 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1050 endif 1054 endif
1051 1055
1052 # We never want expected sections to be place 1056 # We never want expected sections to be placed heuristically by the
1053 # linker. All sections should be explicitly n 1057 # linker. All sections should be explicitly named in the linker script.
1054 ifdef CONFIG_LD_ORPHAN_WARN 1058 ifdef CONFIG_LD_ORPHAN_WARN
1055 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG !! 1059 LDFLAGS_vmlinux += --orphan-handling=warn
1056 endif 1060 endif
1057 1061
1058 # Align the bit size of userspace programs wi 1062 # Align the bit size of userspace programs with the kernel
1059 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta 1063 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1060 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta 1064 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1061 1065
1062 # make the checker run with the right archite 1066 # make the checker run with the right architecture
1063 CHECKFLAGS += --arch=$(ARCH) 1067 CHECKFLAGS += --arch=$(ARCH)
1064 1068
1065 # insure the checker run with the right endia 1069 # insure the checker run with the right endianness
1066 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 1070 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1067 1071
1068 # the checker needs the correct machine size 1072 # the checker needs the correct machine size
1069 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1073 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1070 1074
1071 # Default kernel image to build when no speci 1075 # Default kernel image to build when no specific target is given.
1072 # KBUILD_IMAGE may be overruled on the comman 1076 # KBUILD_IMAGE may be overruled on the command line or
1073 # set in the environment 1077 # set in the environment
1074 # Also any assignments in arch/$(ARCH)/Makefi 1078 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1075 # this default value 1079 # this default value
1076 export KBUILD_IMAGE ?= vmlinux 1080 export KBUILD_IMAGE ?= vmlinux
1077 1081
1078 # 1082 #
1079 # INSTALL_PATH specifies where to place the u 1083 # INSTALL_PATH specifies where to place the updated kernel and system map
1080 # images. Default is /boot, but you can set i 1084 # images. Default is /boot, but you can set it to other values
1081 export INSTALL_PATH ?= /boot 1085 export INSTALL_PATH ?= /boot
1082 1086
1083 # 1087 #
1084 # INSTALL_DTBS_PATH specifies a prefix for re 1088 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1085 # Like INSTALL_MOD_PATH, it isn't defined in 1089 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1086 # an argument if needed. Otherwise it default 1090 # an argument if needed. Otherwise it defaults to the kernel install path
1087 # 1091 #
1088 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 1092 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1089 1093
1090 # 1094 #
1091 # INSTALL_MOD_PATH specifies a prefix to MODL 1095 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1092 # relocations required by build roots. This 1096 # relocations required by build roots. This is not defined in the
1093 # makefile but the argument can be passed to 1097 # makefile but the argument can be passed to make if needed.
1094 # 1098 #
1095 1099
1096 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 1100 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1097 export MODLIB 1101 export MODLIB
1098 1102
>> 1103 HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
>> 1104
>> 1105 has_libelf = $(call try-run,\
>> 1106 echo "int main() {}" | $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
>> 1107
>> 1108 ifdef CONFIG_STACK_VALIDATION
>> 1109 ifeq ($(has_libelf),1)
>> 1110 objtool_target := tools/objtool FORCE
>> 1111 else
>> 1112 SKIP_STACK_VALIDATION := 1
>> 1113 export SKIP_STACK_VALIDATION
>> 1114 endif
>> 1115 endif
>> 1116
>> 1117 PHONY += resolve_btfids_clean
>> 1118
>> 1119 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
>> 1120
>> 1121 # tools/bpf/resolve_btfids directory might not exist
>> 1122 # in output directory, skip its clean in that case
>> 1123 resolve_btfids_clean:
>> 1124 ifneq ($(wildcard $(resolve_btfids_O)),)
>> 1125 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
>> 1126 endif
>> 1127
>> 1128 ifdef CONFIG_BPF
>> 1129 ifdef CONFIG_DEBUG_INFO_BTF
>> 1130 ifeq ($(has_libelf),1)
>> 1131 resolve_btfids_target := tools/bpf/resolve_btfids FORCE
>> 1132 else
>> 1133 ERROR_RESOLVE_BTFIDS := 1
>> 1134 endif
>> 1135 endif # CONFIG_DEBUG_INFO_BTF
>> 1136 endif # CONFIG_BPF
>> 1137
1099 PHONY += prepare0 1138 PHONY += prepare0
1100 1139
1101 export extmod_prefix = $(if $(KBUILD_EXTMOD), 1140 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1102 export MODORDER := $(extmod_prefix)modules.or 1141 export MODORDER := $(extmod_prefix)modules.order
1103 export MODULES_NSDEPS := $(extmod_prefix)modu 1142 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1104 1143
1105 ifeq ($(KBUILD_EXTMOD),) 1144 ifeq ($(KBUILD_EXTMOD),)
>> 1145 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
>> 1146
>> 1147 vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
>> 1148 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 1149 $(libs-y) $(libs-m)))
1106 1150
1107 build-dir := . !! 1151 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1108 clean-dirs := $(sort . Documentation \ <<
1109 $(patsubst %/,%,$(filter 1152 $(patsubst %/,%,$(filter %/, $(core-) \
1110 $(drivers-) $(libs-)) 1153 $(drivers-) $(libs-))))
1111 1154
1112 export ARCH_CORE := $(core-y) !! 1155 subdir-modorder := $(addsuffix modules.order,$(filter %/, \
1113 export ARCH_LIB := $(filter %/, $(lib !! 1156 $(core-y) $(core-m) $(libs-y) $(libs-m) \
1114 export ARCH_DRIVERS := $(drivers-y) $(dri !! 1157 $(drivers-y) $(drivers-m)))
1115 # Externally visible symbols (used by link-vm !! 1158
>> 1159 build-dirs := $(vmlinux-dirs)
>> 1160 clean-dirs := $(vmlinux-alldirs)
1116 1161
1117 KBUILD_VMLINUX_OBJS := ./built-in.a !! 1162 # Externally visible symbols (used by link-vmlinux.sh)
>> 1163 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
>> 1164 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1118 ifdef CONFIG_MODULES 1165 ifdef CONFIG_MODULES
1119 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a 1166 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1120 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib 1167 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1121 else 1168 else
1122 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, 1169 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1123 endif 1170 endif
>> 1171 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1124 1172
1125 export KBUILD_VMLINUX_LIBS !! 1173 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1126 export KBUILD_LDS := arch/$(SRCARCH) 1174 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 1175 # used by scripts/Makefile.package
>> 1176 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
>> 1177
>> 1178 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1127 1179
>> 1180 # Recurse until adjust_autoksyms.sh is satisfied
>> 1181 PHONY += autoksyms_recursive
1128 ifdef CONFIG_TRIM_UNUSED_KSYMS 1182 ifdef CONFIG_TRIM_UNUSED_KSYMS
1129 # For the kernel to actually contain only the 1183 # For the kernel to actually contain only the needed exported symbols,
1130 # we have to build modules as well to determi 1184 # we have to build modules as well to determine what those symbols are.
>> 1185 # (this can be evaluated only once include/config/auto.conf has been included)
1131 KBUILD_MODULES := 1 1186 KBUILD_MODULES := 1
>> 1187
>> 1188 autoksyms_recursive: descend modules.order
>> 1189 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
>> 1190 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1132 endif 1191 endif
1133 1192
1134 # '$(AR) mPi' needs 'T' to workaround the bug !! 1193 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1135 quiet_cmd_ar_vmlinux.a = AR $@ <<
1136 cmd_ar_vmlinux.a = \ <<
1137 rm -f $@; \ <<
1138 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS <<
1139 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) <<
1140 <<
1141 targets += vmlinux.a <<
1142 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea <<
1143 $(call if_changed,ar_vmlinux.a) <<
1144 <<
1145 PHONY += vmlinux_o <<
1146 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) <<
1147 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1148 1194
1149 vmlinux.o modules.builtin.modinfo modules.bui !! 1195 quiet_cmd_autoksyms_h = GEN $@
1150 @: !! 1196 cmd_autoksyms_h = mkdir -p $(dir $@); \
>> 1197 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
>> 1198
>> 1199 $(autoksyms_h):
>> 1200 $(call cmd,autoksyms_h)
>> 1201
>> 1202 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
>> 1203
>> 1204 # Final link of vmlinux with optional arch pass after final link
>> 1205 cmd_link-vmlinux = \
>> 1206 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
>> 1207 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1151 1208
1152 PHONY += vmlinux !! 1209 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1153 # LDFLAGS_vmlinux in the top Makefile defines !! 1210 +$(call if_changed_dep,link-vmlinux)
1154 # not for decompressors. LDFLAGS_vmlinux in a !! 1211
1155 # unrelated; the decompressors just happen to !! 1212 targets := vmlinux
1156 # arch/*/boot/compressed/vmlinux. <<
1157 # Export LDFLAGS_vmlinux only to scripts/Make <<
1158 # <<
1159 # _LDFLAGS_vmlinux is a workaround for the 'p <<
1160 # https://savannah.gnu.org/bugs/?61463 <<
1161 # For Make > 4.4, the following simple code w <<
1162 # vmlinux: private export LDFLAGS_vmlinux := <<
1163 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG <<
1164 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ <<
1165 vmlinux: vmlinux.o $(KBUILD_LDS) modpost <<
1166 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1167 1213
1168 # The actual objects are generated when desce 1214 # The actual objects are generated when descending,
1169 # make sure no implicit rule kicks in 1215 # make sure no implicit rule kicks in
1170 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1216 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1171 1217
1172 ifeq ($(origin KERNELRELEASE),file) !! 1218 filechk_kernel.release = \
1173 filechk_kernel.release = $(srctree)/scripts/s !! 1219 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1174 else <<
1175 filechk_kernel.release = echo $(KERNELRELEASE <<
1176 endif <<
1177 1220
1178 # Store (new) KERNELRELEASE string in include 1221 # Store (new) KERNELRELEASE string in include/config/kernel.release
1179 include/config/kernel.release: FORCE 1222 include/config/kernel.release: FORCE
1180 $(call filechk,kernel.release) 1223 $(call filechk,kernel.release)
1181 1224
1182 # Additional helpers built in scripts/ 1225 # Additional helpers built in scripts/
1183 # Carefully list dependencies so we do not tr 1226 # Carefully list dependencies so we do not try to build scripts twice
1184 # in parallel 1227 # in parallel
1185 PHONY += scripts 1228 PHONY += scripts
1186 scripts: scripts_basic scripts_dtc 1229 scripts: scripts_basic scripts_dtc
1187 $(Q)$(MAKE) $(build)=$(@) 1230 $(Q)$(MAKE) $(build)=$(@)
1188 1231
1189 # Things we need to do before we recursively 1232 # Things we need to do before we recursively start building the kernel
1190 # or the modules are listed in "prepare". 1233 # or the modules are listed in "prepare".
1191 # A multi level approach is used. prepareN is 1234 # A multi level approach is used. prepareN is processed before prepareN-1.
1192 # archprepare is used in arch Makefiles and w 1235 # archprepare is used in arch Makefiles and when processed asm symlink,
1193 # version.h and scripts_basic is processed / 1236 # version.h and scripts_basic is processed / created.
1194 1237
1195 PHONY += prepare archprepare 1238 PHONY += prepare archprepare
1196 1239
1197 archprepare: outputmakefile archheaders archs 1240 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1198 asm-generic $(version_h) include/gene !! 1241 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1199 include/generated/compile.h include/g !! 1242 include/generated/autoconf.h remove-stale-files
1200 1243
1201 prepare0: archprepare 1244 prepare0: archprepare
1202 $(Q)$(MAKE) $(build)=scripts/mod 1245 $(Q)$(MAKE) $(build)=scripts/mod
1203 $(Q)$(MAKE) $(build)=. prepare !! 1246 $(Q)$(MAKE) $(build)=.
1204 1247
1205 # All the preparing.. 1248 # All the preparing..
1206 prepare: prepare0 !! 1249 prepare: prepare0 prepare-objtool prepare-resolve_btfids
1207 ifdef CONFIG_RUST <<
1208 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1209 $(Q)$(MAKE) $(build)=rust <<
1210 endif <<
1211 1250
1212 PHONY += remove-stale-files 1251 PHONY += remove-stale-files
1213 remove-stale-files: 1252 remove-stale-files:
1214 $(Q)$(srctree)/scripts/remove-stale-f 1253 $(Q)$(srctree)/scripts/remove-stale-files
1215 1254
1216 # Support for using generic headers in asm-ge 1255 # Support for using generic headers in asm-generic
1217 asm-generic := -f $(srctree)/scripts/Makefile !! 1256 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1218 1257
1219 PHONY += asm-generic uapi-asm-generic 1258 PHONY += asm-generic uapi-asm-generic
1220 asm-generic: uapi-asm-generic 1259 asm-generic: uapi-asm-generic
1221 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1260 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1222 generic=include/asm-generic 1261 generic=include/asm-generic
1223 uapi-asm-generic: 1262 uapi-asm-generic:
1224 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1263 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1225 generic=include/uapi/asm-generic 1264 generic=include/uapi/asm-generic
1226 1265
>> 1266 PHONY += prepare-objtool prepare-resolve_btfids
>> 1267 prepare-objtool: $(objtool_target)
>> 1268 ifeq ($(SKIP_STACK_VALIDATION),1)
>> 1269 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
>> 1270 @echo "error: Cannot generate __mcount_loc for CONFIG_DYNAMIC_FTRACE=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1271 @false
>> 1272 endif
>> 1273 ifdef CONFIG_UNWINDER_ORC
>> 1274 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1275 @false
>> 1276 else
>> 1277 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1278 endif
>> 1279 endif
>> 1280
>> 1281 prepare-resolve_btfids: $(resolve_btfids_target)
>> 1282 ifeq ($(ERROR_RESOLVE_BTFIDS),1)
>> 1283 @echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1284 @false
>> 1285 endif
1227 # Generate some files 1286 # Generate some files
1228 # ------------------------------------------- 1287 # ---------------------------------------------------------------------------
1229 1288
1230 # KERNELRELEASE can change from a few differe 1289 # KERNELRELEASE can change from a few different places, meaning version.h
1231 # needs to be updated, so this check is force 1290 # needs to be updated, so this check is forced on all builds
1232 1291
1233 uts_len := 64 1292 uts_len := 64
1234 define filechk_utsrelease.h 1293 define filechk_utsrelease.h
1235 if [ `echo -n "$(KERNELRELEASE)" | wc 1294 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1236 echo '"$(KERNELRELEASE)" exceeds $( 1295 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1237 exit 1; 1296 exit 1; \
1238 fi; 1297 fi; \
1239 echo \#define UTS_RELEASE \"$(KERNELR 1298 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1240 endef 1299 endef
1241 1300
1242 define filechk_version.h 1301 define filechk_version.h
1243 if [ $(SUBLEVEL) -gt 255 ]; then 1302 if [ $(SUBLEVEL) -gt 255 ]; then \
1244 echo \#define LINUX_VERSION_C 1303 echo \#define LINUX_VERSION_CODE $(shell \
1245 expr $(VERSION) \* 65536 + $( 1304 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1246 else 1305 else \
1247 echo \#define LINUX_VERSION_C 1306 echo \#define LINUX_VERSION_CODE $(shell \
1248 expr $(VERSION) \* 65536 + $( 1307 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1249 fi; 1308 fi; \
1250 echo '#define KERNEL_VERSION(a,b,c) ( 1309 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
1251 ((c) > 255 ? 255 : (c)))'; 1310 ((c) > 255 ? 255 : (c)))'; \
1252 echo \#define LINUX_VERSION_MAJOR $(V 1311 echo \#define LINUX_VERSION_MAJOR $(VERSION); \
1253 echo \#define LINUX_VERSION_PATCHLEVE 1312 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
1254 echo \#define LINUX_VERSION_SUBLEVEL 1313 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1255 endef 1314 endef
1256 1315
1257 $(version_h): private PATCHLEVEL := $(or $(PA !! 1316 $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1258 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1317 $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
1259 $(version_h): FORCE 1318 $(version_h): FORCE
1260 $(call filechk,version.h) 1319 $(call filechk,version.h)
1261 1320
1262 include/generated/utsrelease.h: include/confi 1321 include/generated/utsrelease.h: include/config/kernel.release FORCE
1263 $(call filechk,utsrelease.h) 1322 $(call filechk,utsrelease.h)
1264 1323
1265 filechk_compile.h = $(srctree)/scripts/mkcomp <<
1266 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION <<
1267 <<
1268 include/generated/compile.h: FORCE <<
1269 $(call filechk,compile.h) <<
1270 <<
1271 PHONY += headerdep 1324 PHONY += headerdep
1272 headerdep: 1325 headerdep:
1273 $(Q)find $(srctree)/include/ -name '* 1326 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1274 $(srctree)/scripts/headerdep.pl -I$(s 1327 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1275 1328
1276 # ------------------------------------------- 1329 # ---------------------------------------------------------------------------
1277 # Kernel headers 1330 # Kernel headers
1278 1331
1279 #Default location for installed headers 1332 #Default location for installed headers
1280 export INSTALL_HDR_PATH = $(objtree)/usr 1333 export INSTALL_HDR_PATH = $(objtree)/usr
1281 1334
1282 quiet_cmd_headers_install = INSTALL $(INSTALL 1335 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1283 cmd_headers_install = \ 1336 cmd_headers_install = \
1284 mkdir -p $(INSTALL_HDR_PATH); \ 1337 mkdir -p $(INSTALL_HDR_PATH); \
1285 rsync -mrl --include='*/' --include=' 1338 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1286 usr/include $(INSTALL_HDR_PATH) 1339 usr/include $(INSTALL_HDR_PATH)
1287 1340
1288 PHONY += headers_install 1341 PHONY += headers_install
1289 headers_install: headers 1342 headers_install: headers
1290 $(call cmd,headers_install) 1343 $(call cmd,headers_install)
1291 1344
1292 PHONY += archheaders archscripts 1345 PHONY += archheaders archscripts
1293 1346
1294 hdr-inst := -f $(srctree)/scripts/Makefile.he 1347 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1295 1348
1296 PHONY += headers 1349 PHONY += headers
1297 headers: $(version_h) scripts_unifdef uapi-as 1350 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1298 $(if $(filter um, $(SRCARCH)), $(erro !! 1351 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
>> 1352 $(error Headers not exportable for the $(SRCARCH) architecture))
1299 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1353 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1300 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1354 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1301 1355
>> 1356 # Deprecated. It is no-op now.
>> 1357 PHONY += headers_check
>> 1358 headers_check:
>> 1359 @echo >&2 "=================== WARNING ==================="
>> 1360 @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
>> 1361 @echo >&2 "and will be removed after Linux 5.15 release."
>> 1362 @echo >&2 "Please remove headers_check from your scripts."
>> 1363 @echo >&2 "==============================================="
>> 1364
1302 ifdef CONFIG_HEADERS_INSTALL 1365 ifdef CONFIG_HEADERS_INSTALL
1303 prepare: headers 1366 prepare: headers
1304 endif 1367 endif
1305 1368
1306 PHONY += scripts_unifdef 1369 PHONY += scripts_unifdef
1307 scripts_unifdef: scripts_basic 1370 scripts_unifdef: scripts_basic
1308 $(Q)$(MAKE) $(build)=scripts scripts/ 1371 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1309 1372
1310 # ------------------------------------------- 1373 # ---------------------------------------------------------------------------
1311 # Install 1374 # Install
1312 1375
1313 # Many distributions have the custom install 1376 # Many distributions have the custom install script, /sbin/installkernel.
1314 # If DKMS is installed, 'make install' will e !! 1377 # If DKMS is installed, 'make install' will eventually recuses back
1315 # to this Makefile to build and install exter !! 1378 # to the this Makefile to build and install external modules.
1316 # Cancel sub_make_done so that options such a 1379 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1317 1380
1318 quiet_cmd_install = INSTALL $(INSTALL_PATH) !! 1381 install: sub_make_done :=
1319 cmd_install = unset sub_make_done; $(sr <<
1320 <<
1321 # ------------------------------------------- <<
1322 # vDSO install <<
1323 <<
1324 PHONY += vdso_install <<
1325 vdso_install: export INSTALL_FILES = $(vdso-i <<
1326 vdso_install: <<
1327 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1328 <<
1329 # ------------------------------------------- <<
1330 # Tools <<
1331 <<
1332 ifdef CONFIG_OBJTOOL <<
1333 prepare: tools/objtool <<
1334 endif <<
1335 <<
1336 ifdef CONFIG_BPF <<
1337 ifdef CONFIG_DEBUG_INFO_BTF <<
1338 prepare: tools/bpf/resolve_btfids <<
1339 endif <<
1340 endif <<
1341 <<
1342 # The tools build system is not a part of Kbu <<
1343 # its own unique issues. If you need to integ <<
1344 # please consider locating that tool outside <<
1345 # standard Kbuild "hostprogs" syntax instead <<
1346 # here. See Documentation/kbuild/makefiles.rs <<
1347 <<
1348 PHONY += resolve_btfids_clean <<
1349 <<
1350 resolve_btfids_O = $(abspath $(objtree))/tool <<
1351 <<
1352 # tools/bpf/resolve_btfids directory might no <<
1353 # in output directory, skip its clean in that <<
1354 resolve_btfids_clean: <<
1355 ifneq ($(wildcard $(resolve_btfids_O)),) <<
1356 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ <<
1357 endif <<
1358 <<
1359 # Clear a bunch of variables before executing <<
1360 ifeq ($(quiet),silent_) <<
1361 tools_silent=s <<
1362 endif <<
1363 <<
1364 tools/: FORCE <<
1365 $(Q)mkdir -p $(objtree)/tools <<
1366 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1367 <<
1368 tools/%: FORCE <<
1369 $(Q)mkdir -p $(objtree)/tools <<
1370 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1371 1382
1372 # ------------------------------------------- <<
1373 # Kernel selftest 1383 # Kernel selftest
1374 1384
1375 PHONY += kselftest 1385 PHONY += kselftest
1376 kselftest: headers !! 1386 kselftest:
1377 $(Q)$(MAKE) -C $(srctree)/tools/testi 1387 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1378 1388
1379 kselftest-%: headers FORCE !! 1389 kselftest-%: FORCE
1380 $(Q)$(MAKE) -C $(srctree)/tools/testi 1390 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1381 1391
1382 PHONY += kselftest-merge 1392 PHONY += kselftest-merge
1383 kselftest-merge: 1393 kselftest-merge:
1384 $(if $(wildcard $(objtree)/.config),, 1394 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1385 $(Q)find $(srctree)/tools/testing/sel !! 1395 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1386 xargs $(srctree)/scripts/kcon !! 1396 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1387 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1397 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1388 1398
1389 # ------------------------------------------- 1399 # ---------------------------------------------------------------------------
1390 # Devicetree files 1400 # Devicetree files
1391 1401
1392 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1402 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1393 dtstree := arch/$(SRCARCH)/boot/dts 1403 dtstree := arch/$(SRCARCH)/boot/dts
1394 endif 1404 endif
1395 1405
1396 ifneq ($(dtstree),) 1406 ifneq ($(dtstree),)
1397 1407
1398 %.dtb: dtbs_prepare !! 1408 %.dtb: include/config/kernel.release scripts_dtc
1399 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1409 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1400 1410
1401 %.dtbo: dtbs_prepare !! 1411 %.dtbo: include/config/kernel.release scripts_dtc
1402 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1412 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1403 1413
1404 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1414 PHONY += dtbs dtbs_install dtbs_check
1405 dtbs: dtbs_prepare !! 1415 dtbs: include/config/kernel.release scripts_dtc
1406 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1416 $(Q)$(MAKE) $(build)=$(dtstree)
1407 <<
1408 # include/config/kernel.release is actually n <<
1409 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) <<
1410 # dtbs_install depend on it as dtbs_install m <<
1411 dtbs_prepare: include/config/kernel.release s <<
1412 1417
1413 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1418 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1414 export CHECK_DTBS=y 1419 export CHECK_DTBS=y
1415 endif !! 1420 dtbs: dt_binding_check
1416 <<
1417 ifneq ($(CHECK_DTBS),) <<
1418 dtbs_prepare: dt_binding_schemas <<
1419 endif 1421 endif
1420 1422
1421 dtbs_check: dtbs 1423 dtbs_check: dtbs
1422 1424
1423 dtbs_install: 1425 dtbs_install:
1424 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1426 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1425 1427
1426 ifdef CONFIG_OF_EARLY_FLATTREE 1428 ifdef CONFIG_OF_EARLY_FLATTREE
1427 all: dtbs 1429 all: dtbs
1428 endif 1430 endif
1429 1431
1430 endif 1432 endif
1431 1433
1432 PHONY += scripts_dtc 1434 PHONY += scripts_dtc
1433 scripts_dtc: scripts_basic 1435 scripts_dtc: scripts_basic
1434 $(Q)$(MAKE) $(build)=scripts/dtc 1436 $(Q)$(MAKE) $(build)=scripts/dtc
1435 1437
1436 ifneq ($(filter dt_binding_check, $(MAKECMDGO 1438 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1437 export CHECK_DTBS=y !! 1439 export CHECK_DT_BINDING=y
1438 endif 1440 endif
1439 1441
1440 PHONY += dt_binding_check dt_binding_schemas !! 1442 PHONY += dt_binding_check
1441 dt_binding_check: dt_binding_schemas scripts_ !! 1443 dt_binding_check: scripts_dtc
1442 $(Q)$(MAKE) $(build)=Documentation/de <<
1443 <<
1444 dt_binding_schemas: <<
1445 $(Q)$(MAKE) $(build)=Documentation/de 1444 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1446 1445
1447 PHONY += dt_compatible_check <<
1448 dt_compatible_check: dt_binding_schemas <<
1449 $(Q)$(MAKE) $(build)=Documentation/de <<
1450 <<
1451 # ------------------------------------------- 1446 # ---------------------------------------------------------------------------
1452 # Modules 1447 # Modules
1453 1448
1454 ifdef CONFIG_MODULES 1449 ifdef CONFIG_MODULES
1455 1450
1456 # By default, build modules as well 1451 # By default, build modules as well
1457 1452
1458 all: modules 1453 all: modules
1459 1454
1460 # When we're building modules with modversion 1455 # When we're building modules with modversions, we need to consider
1461 # the built-in objects during the descend as 1456 # the built-in objects during the descend as well, in order to
1462 # make sure the checksums are up to date befo 1457 # make sure the checksums are up to date before we record them.
1463 ifdef CONFIG_MODVERSIONS 1458 ifdef CONFIG_MODVERSIONS
1464 KBUILD_BUILTIN := 1 1459 KBUILD_BUILTIN := 1
1465 endif 1460 endif
1466 1461
1467 # Build modules 1462 # Build modules
1468 # 1463 #
>> 1464 # A module can be listed more than once in obj-m resulting in
>> 1465 # duplicate lines in modules.order files. Those are removed
>> 1466 # using awk while concatenating to the final file.
1469 1467
1470 # *.ko are usually independent of vmlinux, bu !! 1468 PHONY += modules
1471 # is an exception. !! 1469 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1472 ifdef CONFIG_DEBUG_INFO_BTF_MODULES <<
1473 KBUILD_BUILTIN := 1 <<
1474 modules: vmlinux <<
1475 endif <<
1476 1470
1477 modules: modules_prepare !! 1471 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
>> 1472
>> 1473 modules.order: $(subdir-modorder) FORCE
>> 1474 $(call if_changed,modules_order)
>> 1475
>> 1476 targets += modules.order
1478 1477
1479 # Target to prepare building external modules 1478 # Target to prepare building external modules
>> 1479 PHONY += modules_prepare
1480 modules_prepare: prepare 1480 modules_prepare: prepare
1481 $(Q)$(MAKE) $(build)=scripts scripts/ 1481 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1482 1482
>> 1483 export modules_sign_only :=
>> 1484
>> 1485 ifeq ($(CONFIG_MODULE_SIG),y)
>> 1486 PHONY += modules_sign
>> 1487 modules_sign: modules_install
>> 1488 @:
>> 1489
>> 1490 # modules_sign is a subset of modules_install.
>> 1491 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
>> 1492 ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1493 modules_sign_only := y
>> 1494 endif
>> 1495 endif
>> 1496
>> 1497 modinst_pre :=
>> 1498 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 1499 modinst_pre := __modinst_pre
>> 1500 endif
>> 1501
>> 1502 modules_install: $(modinst_pre)
>> 1503 PHONY += __modinst_pre
>> 1504 __modinst_pre:
>> 1505 @rm -rf $(MODLIB)/kernel
>> 1506 @rm -f $(MODLIB)/source
>> 1507 @mkdir -p $(MODLIB)/kernel
>> 1508 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1509 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1510 rm -f $(MODLIB)/build ; \
>> 1511 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1512 fi
>> 1513 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
>> 1514 @cp -f modules.builtin $(MODLIB)/
>> 1515 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
>> 1516
1483 endif # CONFIG_MODULES 1517 endif # CONFIG_MODULES
1484 1518
1485 ### 1519 ###
1486 # Cleaning is done on three levels. 1520 # Cleaning is done on three levels.
1487 # make clean Delete most generated files 1521 # make clean Delete most generated files
1488 # Leave enough to build extern 1522 # Leave enough to build external modules
1489 # make mrproper Delete the current configura 1523 # make mrproper Delete the current configuration, and all generated files
1490 # make distclean Remove editor backup files, 1524 # make distclean Remove editor backup files, patch leftover files and the like
1491 1525
1492 # Directories & files removed with 'make clea 1526 # Directories & files removed with 'make clean'
1493 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1527 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
1494 modules.builtin modules.builti 1528 modules.builtin modules.builtin.modinfo modules.nsdeps \
1495 modules.builtin.ranges vmlinux !! 1529 compile_commands.json .thinlto-cache
1496 compile_commands.json rust/tes <<
1497 rust-project.json .vmlinux.obj <<
1498 1530
1499 # Directories & files removed with 'make mrpr 1531 # Directories & files removed with 'make mrproper'
1500 MRPROPER_FILES += include/config include/gene 1532 MRPROPER_FILES += include/config include/generated \
1501 arch/$(SRCARCH)/include/gen !! 1533 arch/$(SRCARCH)/include/generated .tmp_objdiff \
1502 debian snap tar-install PKG !! 1534 debian snap tar-install \
1503 .config .config.old .versio 1535 .config .config.old .version \
1504 Module.symvers \ 1536 Module.symvers \
1505 certs/signing_key.pem \ !! 1537 certs/signing_key.pem certs/signing_key.x509 \
1506 certs/x509.genkey \ 1538 certs/x509.genkey \
1507 vmlinux-gdb.py \ 1539 vmlinux-gdb.py \
1508 rpmbuild \ !! 1540 *.spec
1509 rust/libmacros.so <<
1510 1541
1511 # clean - Delete most, but leave enough to bu 1542 # clean - Delete most, but leave enough to build external modules
1512 # 1543 #
1513 clean: private rm-files := $(CLEAN_FILES) !! 1544 clean: rm-files := $(CLEAN_FILES)
1514 1545
1515 PHONY += archclean vmlinuxclean 1546 PHONY += archclean vmlinuxclean
1516 1547
1517 vmlinuxclean: 1548 vmlinuxclean:
1518 $(Q)$(CONFIG_SHELL) $(srctree)/script 1549 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1519 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1550 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1520 1551
1521 clean: archclean vmlinuxclean resolve_btfids_ 1552 clean: archclean vmlinuxclean resolve_btfids_clean
1522 1553
1523 # mrproper - Delete all generated files, incl 1554 # mrproper - Delete all generated files, including .config
1524 # 1555 #
1525 mrproper: private rm-files := $(MRPROPER_FILE !! 1556 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1526 mrproper-dirs := $(addprefix _mrproper_, 1557 mrproper-dirs := $(addprefix _mrproper_,scripts)
1527 1558
1528 PHONY += $(mrproper-dirs) mrproper 1559 PHONY += $(mrproper-dirs) mrproper
1529 $(mrproper-dirs): 1560 $(mrproper-dirs):
1530 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1561 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1531 1562
1532 mrproper: clean $(mrproper-dirs) 1563 mrproper: clean $(mrproper-dirs)
1533 $(call cmd,rmfiles) 1564 $(call cmd,rmfiles)
1534 @find . $(RCS_FIND_IGNORE) \ <<
1535 \( -name '*.rmeta' \) \ <<
1536 -type f -print | xargs rm -f <<
1537 1565
1538 # distclean 1566 # distclean
1539 # 1567 #
1540 PHONY += distclean 1568 PHONY += distclean
1541 1569
1542 distclean: mrproper 1570 distclean: mrproper
1543 @find . $(RCS_FIND_IGNORE) \ 1571 @find . $(RCS_FIND_IGNORE) \
1544 \( -name '*.orig' -o -name '* 1572 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1545 -o -name '*.bak' -o -name '#* 1573 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1546 -o -name 'core' -o -name tags 1574 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1547 -o -name GPATH -o -name GRTAG 1575 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
1548 -type f -print | xargs rm -f 1576 -type f -print | xargs rm -f
1549 1577
1550 1578
1551 # Packaging of the kernel to various formats 1579 # Packaging of the kernel to various formats
1552 # ------------------------------------------- 1580 # ---------------------------------------------------------------------------
1553 1581
1554 %src-pkg: FORCE 1582 %src-pkg: FORCE
1555 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1583 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1556 %pkg: include/config/kernel.release FORCE 1584 %pkg: include/config/kernel.release FORCE
1557 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1585 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1558 1586
1559 # Brief documentation of the typical targets 1587 # Brief documentation of the typical targets used
1560 # ------------------------------------------- 1588 # ---------------------------------------------------------------------------
1561 1589
1562 boards := $(wildcard $(srctree)/arch/$(SRCARC 1590 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1563 boards := $(sort $(notdir $(boards))) 1591 boards := $(sort $(notdir $(boards)))
1564 board-dirs := $(dir $(wildcard $(srctree)/arc 1592 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1565 board-dirs := $(sort $(notdir $(board-dirs:/= 1593 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1566 1594
1567 PHONY += help 1595 PHONY += help
1568 help: 1596 help:
1569 @echo 'Cleaning targets:' 1597 @echo 'Cleaning targets:'
1570 @echo ' clean - Remove mo 1598 @echo ' clean - Remove most generated files but keep the config and'
1571 @echo ' enough bu 1599 @echo ' enough build support to build external modules'
1572 @echo ' mrproper - Remove al 1600 @echo ' mrproper - Remove all generated files + config + various backup files'
1573 @echo ' distclean - mrproper 1601 @echo ' distclean - mrproper + remove editor backup and patch files'
1574 @echo '' 1602 @echo ''
>> 1603 @echo 'Configuration targets:'
1575 @$(MAKE) -f $(srctree)/scripts/kconfi 1604 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1576 @echo '' 1605 @echo ''
1577 @echo 'Other generic targets:' 1606 @echo 'Other generic targets:'
1578 @echo ' all - Build all 1607 @echo ' all - Build all targets marked with [*]'
1579 @echo '* vmlinux - Build the 1608 @echo '* vmlinux - Build the bare kernel'
1580 @echo '* modules - Build all 1609 @echo '* modules - Build all modules'
1581 @echo ' modules_install - Install a 1610 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1582 @echo ' vdso_install - Install u <<
1583 @echo ' dir/ - Build all 1611 @echo ' dir/ - Build all files in dir and below'
1584 @echo ' dir/file.[ois] - Build spe 1612 @echo ' dir/file.[ois] - Build specified target only'
1585 @echo ' dir/file.ll - Build the 1613 @echo ' dir/file.ll - Build the LLVM assembly file'
1586 @echo ' (requires 1614 @echo ' (requires compiler support for LLVM assembly generation)'
1587 @echo ' dir/file.lst - Build spe 1615 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1588 @echo ' (requires 1616 @echo ' (requires a recent binutils and recent build (System.map))'
1589 @echo ' dir/file.ko - Build mod 1617 @echo ' dir/file.ko - Build module including final link'
1590 @echo ' modules_prepare - Set up fo 1618 @echo ' modules_prepare - Set up for building external modules'
1591 @echo ' tags/TAGS - Generate 1619 @echo ' tags/TAGS - Generate tags file for editors'
1592 @echo ' cscope - Generate 1620 @echo ' cscope - Generate cscope index'
1593 @echo ' gtags - Generate 1621 @echo ' gtags - Generate GNU GLOBAL index'
1594 @echo ' kernelrelease - Output th 1622 @echo ' kernelrelease - Output the release version string (use with make -s)'
1595 @echo ' kernelversion - Output th 1623 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1596 @echo ' image_name - Output th 1624 @echo ' image_name - Output the image name (use with make -s)'
1597 @echo ' headers_install - Install s 1625 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1598 echo ' (default: 1626 echo ' (default: $(INSTALL_HDR_PATH))'; \
1599 echo '' 1627 echo ''
1600 @echo 'Static analysers:' 1628 @echo 'Static analysers:'
1601 @echo ' checkstack - Generate !! 1629 @echo ' checkstack - Generate a list of stack hogs'
1602 @echo ' with a st <<
1603 @echo ' versioncheck - Sanity ch 1630 @echo ' versioncheck - Sanity check on version.h usage'
1604 @echo ' includecheck - Check for 1631 @echo ' includecheck - Check for duplicate included header files'
1605 @echo ' export_report - List the 1632 @echo ' export_report - List the usages of all exported symbols'
1606 @echo ' headerdep - Detect in 1633 @echo ' headerdep - Detect inclusion cycles in headers'
1607 @echo ' coccicheck - Check wit 1634 @echo ' coccicheck - Check with Coccinelle'
1608 @echo ' clang-analyzer - Check wit 1635 @echo ' clang-analyzer - Check with clang static analyzer'
1609 @echo ' clang-tidy - Check wit 1636 @echo ' clang-tidy - Check with clang-tidy'
1610 @echo '' 1637 @echo ''
1611 @echo 'Tools:' 1638 @echo 'Tools:'
1612 @echo ' nsdeps - Generate 1639 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1613 @echo '' 1640 @echo ''
1614 @echo 'Kernel selftest:' 1641 @echo 'Kernel selftest:'
1615 @echo ' kselftest - Build a 1642 @echo ' kselftest - Build and run kernel selftest'
1616 @echo ' Build, 1643 @echo ' Build, install, and boot kernel before'
1617 @echo ' running 1644 @echo ' running kselftest on it'
1618 @echo ' Run as 1645 @echo ' Run as root for full coverage'
1619 @echo ' kselftest-all - Build k 1646 @echo ' kselftest-all - Build kernel selftest'
1620 @echo ' kselftest-install - Build a 1647 @echo ' kselftest-install - Build and install kernel selftest'
1621 @echo ' kselftest-clean - Remove 1648 @echo ' kselftest-clean - Remove all generated kselftest files'
1622 @echo ' kselftest-merge - Merge a 1649 @echo ' kselftest-merge - Merge all the config dependencies of'
1623 @echo ' kselfte 1650 @echo ' kselftest to existing .config.'
1624 @echo '' 1651 @echo ''
1625 @echo 'Rust targets:' <<
1626 @echo ' rustavailable - Checks wh <<
1627 @echo ' available <<
1628 @echo ' rustfmt - Reformat <<
1629 @echo ' rustfmtcheck - Checks if <<
1630 @echo ' is format <<
1631 @echo ' rustdoc - Generate <<
1632 @echo ' (requires <<
1633 @echo ' rusttest - Runs the <<
1634 @echo ' (requires <<
1635 @echo ' rust-analyzer - Generate <<
1636 @echo ' (requires <<
1637 @echo ' dir/file.[os] - Build spe <<
1638 @echo ' dir/file.rsi - Build mac <<
1639 @echo ' Run with <<
1640 @echo ' The outpu <<
1641 @echo ' dir/file.ll - Build the <<
1642 @echo '' <<
1643 @$(if $(dtstree), \ 1652 @$(if $(dtstree), \
1644 echo 'Devicetree:'; \ 1653 echo 'Devicetree:'; \
1645 echo '* dtbs - !! 1654 echo '* dtbs - Build device tree blobs for enabled boards'; \
1646 echo ' dtbs_install - !! 1655 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1647 echo ' dt_binding_check - !! 1656 echo ' dt_binding_check - Validate device tree binding documents'; \
1648 echo ' dt_binding_schemas - !! 1657 echo ' dtbs_check - Validate device tree source files';\
1649 echo ' dtbs_check - <<
1650 echo '') 1658 echo '')
1651 1659
1652 @echo 'Userspace tools targets:' 1660 @echo 'Userspace tools targets:'
1653 @echo ' use "make tools/help"' 1661 @echo ' use "make tools/help"'
1654 @echo ' or "cd tools; make help"' 1662 @echo ' or "cd tools; make help"'
1655 @echo '' 1663 @echo ''
1656 @echo 'Kernel packaging:' 1664 @echo 'Kernel packaging:'
1657 @$(MAKE) -f $(srctree)/scripts/Makefi 1665 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1658 @echo '' 1666 @echo ''
1659 @echo 'Documentation targets:' 1667 @echo 'Documentation targets:'
1660 @$(MAKE) -f $(srctree)/Documentation/ 1668 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1661 @echo '' 1669 @echo ''
1662 @echo 'Architecture-specific targets !! 1670 @echo 'Architecture specific targets ($(SRCARCH)):'
1663 @$(or $(archhelp),\ !! 1671 @$(if $(archhelp),$(archhelp),\
1664 echo ' No architecture-speci !! 1672 echo ' No architecture specific help defined for $(SRCARCH)')
1665 @echo '' 1673 @echo ''
1666 @$(if $(boards), \ 1674 @$(if $(boards), \
1667 $(foreach b, $(boards), \ 1675 $(foreach b, $(boards), \
1668 printf " %-27s - Build for % 1676 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1669 echo '') 1677 echo '')
1670 @$(if $(board-dirs), \ 1678 @$(if $(board-dirs), \
1671 $(foreach b, $(board-dirs), \ 1679 $(foreach b, $(board-dirs), \
1672 printf " %-16s - Show %s-spe 1680 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1673 printf " %-16s - Show all of 1681 printf " %-16s - Show all of the above\\n" help-boards; \
1674 echo '') 1682 echo '')
1675 1683
1676 @echo ' make V=n [targets] 1: ver !! 1684 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1677 @echo ' 2: giv !! 1685 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1678 @echo ' V=1 an <<
1679 @echo ' make O=dir [targets] Locate 1686 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1680 @echo ' make C=1 [targets] Check 1687 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1681 @echo ' (spars 1688 @echo ' (sparse by default)'
1682 @echo ' make C=2 [targets] Force 1689 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1683 @echo ' make RECORDMCOUNT_WARN=1 [t 1690 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1684 @echo ' make W=n [targets] Enable !! 1691 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1685 @echo ' 1: warnings w 1692 @echo ' 1: warnings which may be relevant and do not occur too often'
1686 @echo ' 2: warnings w 1693 @echo ' 2: warnings which occur quite often but may still be relevant'
1687 @echo ' 3: more obscu 1694 @echo ' 3: more obscure warnings, can most likely be ignored'
1688 @echo ' c: extra chec <<
1689 @echo ' e: warnings a <<
1690 @echo ' Multiple leve 1695 @echo ' Multiple levels can be combined with W=12 or W=123'
1691 @$(if $(dtstree), \ <<
1692 echo ' make CHECK_DTBS=1 [ta <<
1693 echo ' This can be ap <<
1694 ) <<
1695 @echo '' 1696 @echo ''
1696 @echo 'Execute "make" or "make all" 1697 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1697 @echo 'For further info see the ./RE 1698 @echo 'For further info see the ./README file'
1698 1699
1699 1700
1700 help-board-dirs := $(addprefix help-,$(board- 1701 help-board-dirs := $(addprefix help-,$(board-dirs))
1701 1702
1702 help-boards: $(help-board-dirs) 1703 help-boards: $(help-board-dirs)
1703 1704
1704 boards-per-dir = $(sort $(notdir $(wildcard $ 1705 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1705 1706
1706 $(help-board-dirs): help-%: 1707 $(help-board-dirs): help-%:
1707 @echo 'Architecture-specific targets !! 1708 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1708 @$(if $(boards-per-dir), \ 1709 @$(if $(boards-per-dir), \
1709 $(foreach b, $(boards-per-dir 1710 $(foreach b, $(boards-per-dir), \
1710 printf " %-24s - Build for % 1711 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1711 echo '') 1712 echo '')
1712 1713
1713 1714
1714 # Documentation targets 1715 # Documentation targets
1715 # ------------------------------------------- 1716 # ---------------------------------------------------------------------------
1716 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1717 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1717 linkcheckdocs dochelp refcheck !! 1718 linkcheckdocs dochelp refcheckdocs
1718 PHONY += $(DOC_TARGETS) 1719 PHONY += $(DOC_TARGETS)
1719 $(DOC_TARGETS): 1720 $(DOC_TARGETS):
1720 $(Q)$(MAKE) $(build)=Documentation $@ 1721 $(Q)$(MAKE) $(build)=Documentation $@
1721 1722
1722 <<
1723 # Rust targets <<
1724 # ------------------------------------------- <<
1725 <<
1726 # "Is Rust available?" target <<
1727 PHONY += rustavailable <<
1728 rustavailable: <<
1729 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1730 <<
1731 # Documentation target <<
1732 # <<
1733 # Using the singular to avoid running afoul o <<
1734 PHONY += rustdoc <<
1735 rustdoc: prepare <<
1736 $(Q)$(MAKE) $(build)=rust $@ <<
1737 <<
1738 # Testing target <<
1739 PHONY += rusttest <<
1740 rusttest: prepare <<
1741 $(Q)$(MAKE) $(build)=rust $@ <<
1742 <<
1743 # Formatting targets <<
1744 PHONY += rustfmt rustfmtcheck <<
1745 <<
1746 # We skip `rust/alloc` since we want to minim <<
1747 # <<
1748 # We match using absolute paths since `find` <<
1749 # when matching, which is a problem when e.g. <<
1750 # We `grep` afterwards in order to remove the <<
1751 rustfmt: <<
1752 $(Q)find $(abs_srctree) -type f -name <<
1753 -o -path $(abs_srctree)/rust/ <<
1754 -o -path $(abs_objtree)/rust/ <<
1755 | grep -Fv $(abs_srctree)/rus <<
1756 | grep -Fv $(abs_objtree)/rus <<
1757 | grep -Fv generated \ <<
1758 | xargs $(RUSTFMT) $(rustfmt_ <<
1759 <<
1760 rustfmtcheck: rustfmt_flags = --check <<
1761 rustfmtcheck: rustfmt <<
1762 <<
1763 # Misc 1723 # Misc
1764 # ------------------------------------------- 1724 # ---------------------------------------------------------------------------
1765 1725
1766 PHONY += misc-check <<
1767 misc-check: <<
1768 $(Q)$(srctree)/scripts/misc-check <<
1769 <<
1770 all: misc-check <<
1771 <<
1772 PHONY += scripts_gdb 1726 PHONY += scripts_gdb
1773 scripts_gdb: prepare0 1727 scripts_gdb: prepare0
1774 $(Q)$(MAKE) $(build)=scripts/gdb 1728 $(Q)$(MAKE) $(build)=scripts/gdb
1775 $(Q)ln -fsn $(abspath $(srctree)/scri 1729 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1776 1730
1777 ifdef CONFIG_GDB_SCRIPTS 1731 ifdef CONFIG_GDB_SCRIPTS
1778 all: scripts_gdb 1732 all: scripts_gdb
1779 endif 1733 endif
1780 1734
1781 else # KBUILD_EXTMOD 1735 else # KBUILD_EXTMOD
1782 1736
1783 filechk_kernel.release = echo $(KERNELRELEASE <<
1784 <<
1785 ### 1737 ###
1786 # External module support. 1738 # External module support.
1787 # When building external modules the kernel u 1739 # When building external modules the kernel used as basis is considered
1788 # read-only, and no consistency checks are ma 1740 # read-only, and no consistency checks are made and the make
1789 # system is not used on the basis kernel. If 1741 # system is not used on the basis kernel. If updates are required
1790 # in the basis kernel ordinary make commands 1742 # in the basis kernel ordinary make commands (without M=...) must be used.
1791 1743
1792 # We are always building only modules. 1744 # We are always building only modules.
1793 KBUILD_BUILTIN := 1745 KBUILD_BUILTIN :=
1794 KBUILD_MODULES := 1 1746 KBUILD_MODULES := 1
1795 1747
1796 build-dir := $(KBUILD_EXTMOD) !! 1748 build-dirs := $(KBUILD_EXTMOD)
>> 1749 $(MODORDER): descend
>> 1750 @:
1797 1751
1798 compile_commands.json: $(extmod_prefix)compil 1752 compile_commands.json: $(extmod_prefix)compile_commands.json
1799 PHONY += compile_commands.json 1753 PHONY += compile_commands.json
1800 1754
1801 clean-dirs := $(KBUILD_EXTMOD) 1755 clean-dirs := $(KBUILD_EXTMOD)
1802 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1756 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1803 $(KBUILD_EXTMOD)/compile_commands.jso !! 1757 $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
1804 <<
1805 PHONY += prepare <<
1806 # now expand this into a simple variable to r <<
1807 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT <<
1808 prepare: <<
1809 @if [ "$(CC_VERSION_TEXT)" != "$(CONF <<
1810 echo >&2 "warning: the compil <<
1811 echo >&2 " The kernel was bu <<
1812 echo >&2 " You are using: <<
1813 fi <<
1814 1758
1815 PHONY += help 1759 PHONY += help
1816 help: 1760 help:
1817 @echo ' Building external modules.' 1761 @echo ' Building external modules.'
1818 @echo ' Syntax: make -C path/to/ker 1762 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1819 @echo '' 1763 @echo ''
1820 @echo ' modules - default t 1764 @echo ' modules - default target, build the module(s)'
1821 @echo ' modules_install - install t 1765 @echo ' modules_install - install the module'
1822 @echo ' clean - remove ge 1766 @echo ' clean - remove generated files in module directory only'
1823 @echo ' rust-analyzer - generate <<
1824 @echo '' 1767 @echo ''
1825 1768
1826 ifndef CONFIG_MODULES !! 1769 # no-op for external module builds
1827 modules modules_install: __external_modules_e !! 1770 PHONY += prepare modules_prepare
1828 __external_modules_error: <<
1829 @echo >&2 '***' <<
1830 @echo >&2 '*** The present kernel dis <<
1831 @echo >&2 '*** You cannot build or in <<
1832 @echo >&2 '***' <<
1833 @false <<
1834 endif <<
1835 1771
1836 endif # KBUILD_EXTMOD 1772 endif # KBUILD_EXTMOD
1837 1773
1838 # ------------------------------------------- 1774 # ---------------------------------------------------------------------------
1839 # Modules 1775 # Modules
1840 1776
1841 PHONY += modules modules_install modules_sign !! 1777 PHONY += modules modules_install
1842 <<
1843 modules_install: <<
1844 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1845 sign-only=$(if $(filter modules_insta <<
1846 <<
1847 ifeq ($(CONFIG_MODULE_SIG),y) <<
1848 # modules_sign is a subset of modules_install <<
1849 # 'make modules_install modules_sign' is equi <<
1850 modules_sign: modules_install <<
1851 @: <<
1852 else <<
1853 modules_sign: <<
1854 @echo >&2 '***' <<
1855 @echo >&2 '*** CONFIG_MODULE_SIG is d <<
1856 @echo >&2 '***' <<
1857 @false <<
1858 endif <<
1859 1778
1860 ifdef CONFIG_MODULES 1779 ifdef CONFIG_MODULES
1861 1780
1862 $(MODORDER): $(build-dir) !! 1781 modules: modules_check
1863 @: !! 1782 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1864 <<
1865 # KBUILD_MODPOST_NOFINAL can be set to skip t <<
1866 # This is solely useful to speed up test comp <<
1867 modules: modpost <<
1868 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1869 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1870 endif <<
1871 1783
1872 PHONY += modules_check 1784 PHONY += modules_check
1873 modules_check: $(MODORDER) 1785 modules_check: $(MODORDER)
1874 $(Q)$(CONFIG_SHELL) $(srctree)/script 1786 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1875 1787
>> 1788 quiet_cmd_depmod = DEPMOD $(MODLIB)
>> 1789 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1790 $(KERNELRELEASE)
>> 1791
>> 1792 modules_install:
>> 1793 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1794 $(call cmd,depmod)
>> 1795
1876 else # CONFIG_MODULES 1796 else # CONFIG_MODULES
1877 1797
1878 modules: !! 1798 # Modules not configured
1879 @: !! 1799 # ---------------------------------------------------------------------------
1880 1800
1881 KBUILD_MODULES := !! 1801 modules modules_install:
>> 1802 @echo >&2 '***'
>> 1803 @echo >&2 '*** The present kernel configuration has modules disabled.'
>> 1804 @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
>> 1805 @echo >&2 '*** to enable CONFIG_MODULES.'
>> 1806 @echo >&2 '***'
>> 1807 @exit 1
1882 1808
1883 endif # CONFIG_MODULES 1809 endif # CONFIG_MODULES
1884 1810
1885 PHONY += modpost <<
1886 modpost: $(if $(single-build),, $(if $(KBUILD <<
1887 $(if $(KBUILD_MODULES), modules_chec <<
1888 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1889 <<
1890 # Single targets 1811 # Single targets
1891 # ------------------------------------------- 1812 # ---------------------------------------------------------------------------
1892 # To build individual files in subdirectories 1813 # To build individual files in subdirectories, you can do like this:
1893 # 1814 #
1894 # make foo/bar/baz.s 1815 # make foo/bar/baz.s
1895 # 1816 #
1896 # The supported suffixes for single-target ar 1817 # The supported suffixes for single-target are listed in 'single-targets'
1897 # 1818 #
1898 # To build only under specific subdirectories 1819 # To build only under specific subdirectories, you can do like this:
1899 # 1820 #
1900 # make foo/bar/baz/ 1821 # make foo/bar/baz/
1901 1822
1902 ifdef single-build 1823 ifdef single-build
1903 1824
1904 # .ko is special because modpost is needed 1825 # .ko is special because modpost is needed
1905 single-ko := $(sort $(filter %.ko, $(MAKECMDG 1826 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1906 single-no-ko := $(filter-out $(single-ko), $( !! 1827 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1907 $(foreach x, o mod, $(patsubs <<
1908 1828
1909 $(single-ko): single_modules !! 1829 $(single-ko): single_modpost
1910 @: 1830 @:
1911 $(single-no-ko): $(build-dir) !! 1831 $(single-no-ko): descend
1912 @: 1832 @:
1913 1833
1914 # Remove MODORDER when done because it is not !! 1834 ifeq ($(KBUILD_EXTMOD),)
1915 PHONY += single_modules !! 1835 # For the single build of in-tree modules, use a temporary file to avoid
1916 single_modules: $(single-no-ko) modules_prepa !! 1836 # the situation of modules_install installing an invalid modules.order.
1917 $(Q){ $(foreach m, $(single-ko), echo !! 1837 MODORDER := .modules.tmp
1918 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1919 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1920 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1921 endif 1838 endif
1922 $(Q)rm -f $(MODORDER) <<
1923 1839
1924 single-goals := $(addprefix $(build-dir)/, $( !! 1840 PHONY += single_modpost
>> 1841 single_modpost: $(single-no-ko) modules_prepare
>> 1842 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
>> 1843 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1925 1844
1926 KBUILD_MODULES := 1 1845 KBUILD_MODULES := 1
1927 1846
>> 1847 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
>> 1848
>> 1849 # trim unrelated directories
>> 1850 build-dirs := $(foreach d, $(build-dirs), \
>> 1851 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
>> 1852
>> 1853 endif
>> 1854
>> 1855 ifndef CONFIG_MODULES
>> 1856 KBUILD_MODULES :=
1928 endif 1857 endif
1929 1858
>> 1859 # Handle descending into subdirectories listed in $(build-dirs)
1930 # Preset locale variables to speed up the bui 1860 # Preset locale variables to speed up the build process. Limit locale
1931 # tweaks to this spot to avoid wrong language 1861 # tweaks to this spot to avoid wrong language settings when running
1932 # make menuconfig etc. 1862 # make menuconfig etc.
1933 # Error messages still appears in the origina 1863 # Error messages still appears in the original language
1934 PHONY += $(build-dir) !! 1864 PHONY += descend $(build-dirs)
1935 $(build-dir): prepare !! 1865 descend: $(build-dirs)
1936 $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1866 $(build-dirs): prepare
>> 1867 $(Q)$(MAKE) $(build)=$@ \
>> 1868 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
>> 1869 need-builtin=1 need-modorder=1
1937 1870
1938 clean-dirs := $(addprefix _clean_, $(clean-di 1871 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1939 PHONY += $(clean-dirs) clean 1872 PHONY += $(clean-dirs) clean
1940 $(clean-dirs): 1873 $(clean-dirs):
1941 $(Q)$(MAKE) $(clean)=$(patsubst _clea 1874 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1942 1875
1943 clean: $(clean-dirs) 1876 clean: $(clean-dirs)
1944 $(call cmd,rmfiles) 1877 $(call cmd,rmfiles)
1945 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1878 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1946 \( -name '*.[aios]' -o -name !! 1879 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1947 -o -name '*.ko.*' \ 1880 -o -name '*.ko.*' \
1948 -o -name '*.dtb' -o -name '*. !! 1881 -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1949 -o -name '*.dtb.S' -o -name ' <<
1950 -o -name '*.dt.yaml' -o -name <<
1951 -o -name '*.dwo' -o -name '*. 1882 -o -name '*.dwo' -o -name '*.lst' \
1952 -o -name '*.su' -o -name '*.m 1883 -o -name '*.su' -o -name '*.mod' \
1953 -o -name '.*.d' -o -name '.*. 1884 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1954 -o -name '*.lex.c' -o -name ' 1885 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1955 -o -name '*.asn1.[ch]' \ 1886 -o -name '*.asn1.[ch]' \
1956 -o -name '*.symtypes' -o -nam 1887 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1888 -o -name '.tmp_*.o.*' \
1957 -o -name '*.c.[012]*.*' \ 1889 -o -name '*.c.[012]*.*' \
1958 -o -name '*.ll' \ 1890 -o -name '*.ll' \
1959 -o -name '*.gcno' \ 1891 -o -name '*.gcno' \
1960 \) -type f -print \ !! 1892 -o -name '*.*.symversions' \) -type f -print | xargs rm -f
1961 -o -name '.tmp_*' -print \ <<
1962 | xargs rm -rf <<
1963 1893
1964 # Generate tags for editors 1894 # Generate tags for editors
1965 # ------------------------------------------- 1895 # ---------------------------------------------------------------------------
1966 quiet_cmd_tags = GEN $@ 1896 quiet_cmd_tags = GEN $@
1967 cmd_tags = $(BASH) $(srctree)/scripts/t 1897 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1968 1898
1969 tags TAGS cscope gtags: FORCE 1899 tags TAGS cscope gtags: FORCE
1970 $(call cmd,tags) 1900 $(call cmd,tags)
1971 1901
1972 # Generate rust-project.json (a file that des <<
1973 # Rust projects) for rust-analyzer (an implem <<
1974 # Protocol). <<
1975 PHONY += rust-analyzer <<
1976 rust-analyzer: <<
1977 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1978 $(Q)$(MAKE) $(build)=rust $@ <<
1979 <<
1980 # Script to generate missing namespace depend 1902 # Script to generate missing namespace dependencies
1981 # ------------------------------------------- 1903 # ---------------------------------------------------------------------------
1982 1904
1983 PHONY += nsdeps 1905 PHONY += nsdeps
1984 nsdeps: export KBUILD_NSDEPS=1 1906 nsdeps: export KBUILD_NSDEPS=1
1985 nsdeps: modules 1907 nsdeps: modules
1986 $(Q)$(CONFIG_SHELL) $(srctree)/script 1908 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1987 1909
1988 # Clang Tooling 1910 # Clang Tooling
1989 # ------------------------------------------- 1911 # ---------------------------------------------------------------------------
1990 1912
1991 quiet_cmd_gen_compile_commands = GEN $@ 1913 quiet_cmd_gen_compile_commands = GEN $@
1992 cmd_gen_compile_commands = $(PYTHON3) $ 1914 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1993 1915
1994 $(extmod_prefix)compile_commands.json: $(srct !! 1916 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1995 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K !! 1917 $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
1996 $(if $(CONFIG_MODULES), $(MODORDER)) 1918 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1997 $(call if_changed,gen_compile_command 1919 $(call if_changed,gen_compile_commands)
1998 1920
1999 targets += $(extmod_prefix)compile_commands.j 1921 targets += $(extmod_prefix)compile_commands.json
2000 1922
2001 PHONY += clang-tidy clang-analyzer 1923 PHONY += clang-tidy clang-analyzer
2002 1924
2003 ifdef CONFIG_CC_IS_CLANG 1925 ifdef CONFIG_CC_IS_CLANG
2004 quiet_cmd_clang_tools = CHECK $< 1926 quiet_cmd_clang_tools = CHECK $<
2005 cmd_clang_tools = $(PYTHON3) $(srctree) 1927 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
2006 1928
2007 clang-tidy clang-analyzer: $(extmod_prefix)co 1929 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
2008 $(call cmd,clang_tools) 1930 $(call cmd,clang_tools)
2009 else 1931 else
2010 clang-tidy clang-analyzer: 1932 clang-tidy clang-analyzer:
2011 @echo "$@ requires CC=clang" >&2 1933 @echo "$@ requires CC=clang" >&2
2012 @false 1934 @false
2013 endif 1935 endif
2014 1936
2015 # Scripts to check various things for consist 1937 # Scripts to check various things for consistency
2016 # ------------------------------------------- 1938 # ---------------------------------------------------------------------------
2017 1939
2018 PHONY += includecheck versioncheck coccicheck 1940 PHONY += includecheck versioncheck coccicheck export_report
2019 1941
2020 includecheck: 1942 includecheck:
2021 find $(srctree)/* $(RCS_FIND_IGNORE) 1943 find $(srctree)/* $(RCS_FIND_IGNORE) \
2022 -name '*.[hcS]' -type f -prin 1944 -name '*.[hcS]' -type f -print | sort \
2023 | xargs $(PERL) -w $(srctree) 1945 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2024 1946
2025 versioncheck: 1947 versioncheck:
2026 find $(srctree)/* $(RCS_FIND_IGNORE) 1948 find $(srctree)/* $(RCS_FIND_IGNORE) \
2027 -name '*.[hcS]' -type f -prin 1949 -name '*.[hcS]' -type f -print | sort \
2028 | xargs $(PERL) -w $(srctree) 1950 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2029 1951
2030 coccicheck: 1952 coccicheck:
2031 $(Q)$(BASH) $(srctree)/scripts/$@ 1953 $(Q)$(BASH) $(srctree)/scripts/$@
2032 1954
2033 export_report: 1955 export_report:
2034 $(PERL) $(srctree)/scripts/export_rep 1956 $(PERL) $(srctree)/scripts/export_report.pl
2035 1957
2036 PHONY += checkstack kernelrelease kernelversi 1958 PHONY += checkstack kernelrelease kernelversion image_name
2037 1959
2038 # UML needs a little special treatment here. 1960 # UML needs a little special treatment here. It wants to use the host
2039 # toolchain, so needs $(SUBARCH) passed to ch 1961 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2040 # else wants $(ARCH), including people doing 1962 # else wants $(ARCH), including people doing cross-builds, which means
2041 # that $(SUBARCH) doesn't work here. 1963 # that $(SUBARCH) doesn't work here.
2042 ifeq ($(ARCH), um) 1964 ifeq ($(ARCH), um)
2043 CHECKSTACK_ARCH := $(SUBARCH) 1965 CHECKSTACK_ARCH := $(SUBARCH)
2044 else 1966 else
2045 CHECKSTACK_ARCH := $(ARCH) 1967 CHECKSTACK_ARCH := $(ARCH)
2046 endif 1968 endif
2047 MINSTACKSIZE ?= 100 <<
2048 checkstack: 1969 checkstack:
2049 $(OBJDUMP) -d vmlinux $$(find . -name 1970 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2050 $(PERL) $(srctree)/scripts/checkstack !! 1971 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2051 1972
2052 kernelrelease: 1973 kernelrelease:
2053 @$(filechk_kernel.release) !! 1974 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2054 1975
2055 kernelversion: 1976 kernelversion:
2056 @echo $(KERNELVERSION) 1977 @echo $(KERNELVERSION)
2057 1978
2058 image_name: 1979 image_name:
2059 @echo $(KBUILD_IMAGE) 1980 @echo $(KBUILD_IMAGE)
2060 1981
2061 PHONY += run-command !! 1982 # Clear a bunch of variables before executing the submake
2062 run-command: !! 1983
2063 $(Q)$(KBUILD_RUN_COMMAND) !! 1984 ifeq ($(quiet),silent_)
>> 1985 tools_silent=s
>> 1986 endif
>> 1987
>> 1988 tools/: FORCE
>> 1989 $(Q)mkdir -p $(objtree)/tools
>> 1990 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
>> 1991
>> 1992 tools/%: FORCE
>> 1993 $(Q)mkdir -p $(objtree)/tools
>> 1994 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
2064 1995
2065 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1996 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2066 cmd_rmfiles = rm -rf $(rm-files) 1997 cmd_rmfiles = rm -rf $(rm-files)
2067 1998
2068 # read saved command lines for existing targe 1999 # read saved command lines for existing targets
2069 existing-targets := $(wildcard $(sort $(targe 2000 existing-targets := $(wildcard $(sort $(targets)))
2070 2001
2071 -include $(foreach f,$(existing-targets),$(di 2002 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2072 2003
2073 endif # config-build 2004 endif # config-build
2074 endif # mixed-build 2005 endif # mixed-build
2075 endif # need-sub-make 2006 endif # need-sub-make
2076 2007
2077 PHONY += FORCE 2008 PHONY += FORCE
2078 FORCE: 2009 FORCE:
2079 2010
2080 # Declare the contents of the PHONY variable 2011 # Declare the contents of the PHONY variable as phony. We keep that
2081 # information in a variable so we can use it 2012 # information in a variable so we can use it in if_changed and friends.
2082 .PHONY: $(PHONY) 2013 .PHONY: $(PHONY)
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