1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 !! 2 VERSION = 5
3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 10
4 SUBLEVEL = 5 !! 4 SUBLEVEL = 228
5 EXTRAVERSION = 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Dare mighty things
7 7
8 # *DOCUMENTATION* 8 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 10 # More info can be located in ./README
11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file.
13 13
14 ifeq ($(filter output-sync,$(.FEATURES)),) <<
15 $(error GNU Make >= 4.0 is required. Your Make <<
16 endif <<
17 <<
18 $(if $(filter __%, $(MAKECMDGOALS)), \ 14 $(if $(filter __%, $(MAKECMDGOALS)), \
19 $(error targets prefixed with '__' are 15 $(error targets prefixed with '__' are only for internal use))
20 16
21 # That's our default target when none is given 17 # That's our default target when none is given on the command line
22 PHONY := __all 18 PHONY := __all
23 __all: 19 __all:
24 20
25 # We are using a recursive build, so we need t 21 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 22 # to get the ordering right.
27 # 23 #
28 # Most importantly: sub-Makefiles should only 24 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 25 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 26 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 27 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 28 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 29 # after that we are sure that everything which is in that other dir
34 # is now up to date. 30 # is now up to date.
35 # 31 #
36 # The only cases where we need to modify files 32 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 33 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 34 # descending is started. They are now explicitly listed as the
39 # prepare rule. 35 # prepare rule.
40 36
41 this-makefile := $(lastword $(MAKEFILE_LIST)) <<
42 abs_srctree := $(realpath $(dir $(this-makefil <<
43 abs_objtree := $(CURDIR) <<
44 <<
45 ifneq ($(sub_make_done),1) 37 ifneq ($(sub_make_done),1)
46 38
47 # Do not use make's built-in rules and variabl 39 # Do not use make's built-in rules and variables
48 # (this increases performance and avoids hard- 40 # (this increases performance and avoids hard-to-debug behaviour)
49 MAKEFLAGS += -rR 41 MAKEFLAGS += -rR
50 42
51 # Avoid funny character set dependencies 43 # Avoid funny character set dependencies
52 unexport LC_ALL 44 unexport LC_ALL
53 LC_COLLATE=C 45 LC_COLLATE=C
54 LC_NUMERIC=C 46 LC_NUMERIC=C
55 export LC_COLLATE LC_NUMERIC 47 export LC_COLLATE LC_NUMERIC
56 48
57 # Avoid interference with shell env settings 49 # Avoid interference with shell env settings
58 unexport GREP_OPTIONS 50 unexport GREP_OPTIONS
59 51
60 # Beautify output 52 # Beautify output
61 # -------------------------------------------- 53 # ---------------------------------------------------------------------------
62 # 54 #
63 # Most of build commands in Kbuild start with !! 55 # Normally, we echo the whole command before executing it. By making
64 # "quiet_cmd_*". If defined, the short log is !! 56 # that echo $($(quiet)$(cmd)), we now have the possibility to set
65 # that command is printed by default. !! 57 # $(quiet) to choose other forms of output instead, e.g.
66 # !! 58 #
67 # e.g.) !! 59 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 60 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
69 # cmd_depmod = $(srctree)/scripts/dep !! 61 #
>> 62 # If $(quiet) is empty, the whole command will be printed.
>> 63 # If it is set to "quiet_", only the short version will be printed.
>> 64 # If it is set to "silent_", nothing will be printed at all, since
>> 65 # the variable $(silent_cmd_cc_o_c) doesn't exist.
70 # 66 #
71 # A simple variant is to prefix commands with 67 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 68 # for commands that shall be hidden in non-verbose mode.
73 # 69 #
74 # $(Q)$(MAKE) $(build)=scripts/basic !! 70 # $(Q)ln $@ :<
75 # 71 #
76 # If KBUILD_VERBOSE contains 1, the whole comm !! 72 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
77 # If KBUILD_VERBOSE contains 2, the reason for !! 73 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
>> 74 # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
78 # 75 #
79 # To put more focus on warnings, be less verbo 76 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 77 # Use 'make V=1' to see the full commands
81 78
82 ifeq ("$(origin V)", "command line") 79 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 80 KBUILD_VERBOSE = $(V)
84 endif 81 endif
>> 82 ifndef KBUILD_VERBOSE
>> 83 KBUILD_VERBOSE = 0
>> 84 endif
85 85
86 quiet = quiet_ !! 86 ifeq ($(KBUILD_VERBOSE),1)
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = 87 quiet =
91 Q = 88 Q =
>> 89 else
>> 90 quiet=quiet_
>> 91 Q = @
92 endif 92 endif
93 93
94 # If the user is running make -s (silent mode) 94 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 95 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 96 # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
97 quiet=silent_ <<
98 override KBUILD_VERBOSE := <<
99 endif <<
100 <<
101 export quiet Q KBUILD_VERBOSE <<
102 <<
103 # Call a source code checker (by default, "spa <<
104 # C compilation. <<
105 # <<
106 # Use 'make C=1' to enable checking of only re <<
107 # Use 'make C=2' to enable checking of *all* s <<
108 # of whether they are re-compiled or not. <<
109 # <<
110 # See the file "Documentation/dev-tools/sparse <<
111 # including where to get the "sparse" utility. <<
112 <<
113 ifeq ("$(origin C)", "command line") <<
114 KBUILD_CHECKSRC = $(C) <<
115 endif <<
116 ifndef KBUILD_CHECKSRC <<
117 KBUILD_CHECKSRC = 0 <<
118 endif <<
119 <<
120 export KBUILD_CHECKSRC <<
121 <<
122 # Enable "clippy" (a linter) as part of the Ru <<
123 # <<
124 # Use 'make CLIPPY=1' to enable it. <<
125 ifeq ("$(origin CLIPPY)", "command line") <<
126 KBUILD_CLIPPY := $(CLIPPY) <<
127 endif <<
128 <<
129 export KBUILD_CLIPPY <<
130 <<
131 # Use make M=dir or set the environment variab <<
132 # directory of external module to build. Setti <<
133 ifeq ("$(origin M)", "command line") <<
134 KBUILD_EXTMOD := $(M) <<
135 endif <<
136 <<
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ <<
138 $(error building multiple external mod <<
139 <<
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI <<
141 $(error module directory path cannot c <<
142 97
143 # Remove trailing slashes !! 98 ifeq ($(filter 3.%,$(MAKE_VERSION)),)
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) !! 99 silence:=$(findstring s,$(firstword -$(MAKEFLAGS)))
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM !! 100 else
>> 101 silence:=$(findstring s,$(filter-out --%,$(MAKEFLAGS)))
146 endif 102 endif
147 103
148 export KBUILD_EXTMOD !! 104 ifeq ($(silence),s)
149 !! 105 quiet=silent_
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif 106 endif
156 107
157 export KBUILD_EXTRA_WARN !! 108 export quiet Q KBUILD_VERBOSE
158 109
159 # Kbuild will save output files in the current 110 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t 111 # This does not need to match to the root of the kernel source tree.
161 # 112 #
162 # For example, you can do this: 113 # For example, you can do this:
163 # 114 #
164 # cd /dir/to/store/output/files; make -f /dir 115 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 # 116 #
166 # If you want to save output files in a differ 117 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it. 118 # two syntaxes to specify it.
168 # 119 #
169 # 1) O= 120 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 121 # Use "make O=dir/to/store/output/files/"
171 # 122 #
172 # 2) Set KBUILD_OUTPUT 123 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t 124 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil 125 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 # 126 #
176 # The O= assignment takes precedence over the 127 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 128 # variable.
178 129
179 # Do we want to change the working directory? 130 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line") 131 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 132 KBUILD_OUTPUT := $(O)
182 endif 133 endif
183 134
184 ifneq ($(KBUILD_OUTPUT),) 135 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does !! 136 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 137 # expand a shell special character '~'. We use a somewhat tedious way here.
>> 138 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
>> 139 $(if $(abs_objtree),, \
>> 140 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
>> 141
187 # $(realpath ...) resolves symlinks 142 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 143 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create !! 144 else
>> 145 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),) 146 endif # ifneq ($(KBUILD_OUTPUT),)
191 147
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 148 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 149 # Suppress "Entering directory ..." unless we are changing the work directory.
>> 150 MAKEFLAGS += --no-print-directory
>> 151 else
>> 152 need-sub-make := 1
194 endif 153 endif
195 154
196 export sub_make_done := 1 !! 155 abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
197 156
198 endif # sub_make_done !! 157 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
>> 158 $(error source directory cannot contain spaces or colons)
>> 159 endif
199 160
200 ifeq ($(abs_objtree),$(CURDIR)) !! 161 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are !! 162 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory !! 163 #
203 else !! 164 # This does not become effective immediately because MAKEFLAGS is re-parsed
204 # Recursion to show "Entering directory ..." !! 165 # once after the Makefile is read. We need to invoke sub-make.
>> 166 MAKEFLAGS += --include-dir=$(abs_srctree)
205 need-sub-make := 1 167 need-sub-make := 1
206 endif 168 endif
207 169
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 170 this-makefile := $(lastword $(MAKEFILE_LIST))
209 # If --no-print-directory is unset, recurse on !! 171
210 # You may end up recursing into __sub-make twi !! 172 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
211 # behavior change in GNU Make 4.4.1. !! 173 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
>> 174 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
212 need-sub-make := 1 175 need-sub-make := 1
>> 176 # Cancel implicit rules for this Makefile.
>> 177 $(this-makefile): ;
213 endif 178 endif
214 179
>> 180 export abs_srctree abs_objtree
>> 181 export sub_make_done := 1
>> 182
215 ifeq ($(need-sub-make),1) 183 ifeq ($(need-sub-make),1)
216 184
217 PHONY += $(MAKECMDGOALS) __sub-make 185 PHONY += $(MAKECMDGOALS) __sub-make
218 186
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) 187 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220 @: 188 @:
221 189
222 # Invoke a second make in the output directory 190 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: 191 __sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 192 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225 -f $(abs_srctree)/Makefile $(MAKECMDGO <<
226 193
227 else # need-sub-make !! 194 endif # need-sub-make
>> 195 endif # sub_make_done
228 196
229 # We process the rest of the Makefile if this 197 # We process the rest of the Makefile if this is the final invocation of make
>> 198 ifeq ($(need-sub-make),)
>> 199
>> 200 # Do not print "Entering directory ...",
>> 201 # but we want to display it when entering to the output directory
>> 202 # so that IDEs/editors are able to understand relative filenames.
>> 203 MAKEFLAGS += --no-print-directory
>> 204
>> 205 # Call a source code checker (by default, "sparse") as part of the
>> 206 # C compilation.
>> 207 #
>> 208 # Use 'make C=1' to enable checking of only re-compiled files.
>> 209 # Use 'make C=2' to enable checking of *all* source files, regardless
>> 210 # of whether they are re-compiled or not.
>> 211 #
>> 212 # See the file "Documentation/dev-tools/sparse.rst" for more details,
>> 213 # including where to get the "sparse" utility.
>> 214
>> 215 ifeq ("$(origin C)", "command line")
>> 216 KBUILD_CHECKSRC = $(C)
>> 217 endif
>> 218 ifndef KBUILD_CHECKSRC
>> 219 KBUILD_CHECKSRC = 0
>> 220 endif
>> 221
>> 222 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
>> 223 # directory of external module to build. Setting M= takes precedence.
>> 224 ifeq ("$(origin M)", "command line")
>> 225 KBUILD_EXTMOD := $(M)
>> 226 endif
>> 227
>> 228 $(if $(word 2, $(KBUILD_EXTMOD)), \
>> 229 $(error building multiple external modules is not supported))
>> 230
>> 231 export KBUILD_CHECKSRC KBUILD_EXTMOD
>> 232
>> 233 extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
230 234
231 ifeq ($(abs_srctree),$(abs_objtree)) 235 ifeq ($(abs_srctree),$(abs_objtree))
232 # building in the source tree 236 # building in the source tree
233 srctree := . 237 srctree := .
234 building_out_of_srctree := 238 building_out_of_srctree :=
235 else 239 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 240 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237 # building in a subdirectory o 241 # building in a subdirectory of the source tree
238 srctree := .. 242 srctree := ..
239 else 243 else
240 srctree := $(abs_srctree) 244 srctree := $(abs_srctree)
241 endif 245 endif
242 building_out_of_srctree := 1 246 building_out_of_srctree := 1
243 endif 247 endif
244 248
245 ifneq ($(KBUILD_ABS_SRCTREE),) 249 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree) 250 srctree := $(abs_srctree)
247 endif 251 endif
248 252
249 objtree := . 253 objtree := .
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 254 VPATH := $(srctree)
256 endif <<
257 endif <<
258 255
259 export building_out_of_srctree srctree objtree 256 export building_out_of_srctree srctree objtree VPATH
260 257
261 # To make sure we do not include .config for a 258 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 259 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 260 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 261 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 262 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 263 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 264 # of make so .config is not included in this case either (for *config).
268 265
269 version_h := include/generated/uapi/linux/vers 266 version_h := include/generated/uapi/linux/version.h
>> 267 old_version_h := include/linux/version.h
270 268
271 clean-targets := %clean mrproper cleandocs 269 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 270 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 271 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers 272 $(version_h) headers headers_% archheaders archscripts \
275 %asm-generic kernelve 273 %asm-generic kernelversion %src-pkg dt_binding_check \
276 outputmakefile rustav !! 274 outputmakefile
277 no-sync-config-targets := $(no-dot-config-targ !! 275 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
278 image_name 276 image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 277 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
280 278
281 config-build := 279 config-build :=
282 mixed-build := 280 mixed-build :=
283 need-config := 1 281 need-config := 1
284 may-sync-config := 1 282 may-sync-config := 1
285 single-build := 283 single-build :=
286 284
287 ifneq ($(filter $(no-dot-config-targets), $(MA 285 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 286 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 287 need-config :=
290 endif !! 288 endif
291 endif 289 endif
292 290
293 ifneq ($(filter $(no-sync-config-targets), $(M 291 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 292 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 293 may-sync-config :=
296 endif !! 294 endif
297 endif 295 endif
298 296
299 need-compiler := $(may-sync-config) <<
300 <<
301 ifneq ($(KBUILD_EXTMOD),) 297 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 298 may-sync-config :=
303 endif 299 endif
304 300
305 ifeq ($(KBUILD_EXTMOD),) 301 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 302 ifneq ($(filter %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 303 config-build := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 304 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 305 mixed-build := 1
>> 306 endif
310 endif 307 endif
311 endif <<
312 endif 308 endif
313 309
314 # We cannot build single targets and the other 310 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO 311 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 single-build := 1 !! 312 single-build := 1
317 ifneq ($(filter-out $(single-targets), $(M !! 313 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318 mixed-build := 1 !! 314 mixed-build := 1
319 endif !! 315 endif
320 endif 316 endif
321 317
322 # For "make -j clean all", "make -j mrproper d 318 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 319 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 320 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 321 mixed-build := 1
326 endif !! 322 endif
327 endif 323 endif
328 324
329 # install and modules_install need also be pro 325 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 326 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 327 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 328 mixed-build := 1
333 endif !! 329 endif
334 endif 330 endif
335 331
336 ifdef mixed-build 332 ifdef mixed-build
337 # ============================================ 333 # ===========================================================================
338 # We're called with mixed targets (*config and 334 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 335 # Handle them one by one.
340 336
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 337 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 338
343 $(MAKECMDGOALS): __build_one_by_one 339 $(MAKECMDGOALS): __build_one_by_one
344 @: 340 @:
345 341
346 __build_one_by_one: 342 __build_one_by_one:
347 $(Q)set -e; \ 343 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 344 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 345 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 346 done
351 347
352 else # !mixed-build 348 else # !mixed-build
353 349
354 include $(srctree)/scripts/Kbuild.include !! 350 include scripts/Kbuild.include
355 351
356 # Read KERNELRELEASE from include/config/kerne 352 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 353 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 354 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 355 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 356
361 include $(srctree)/scripts/subarch.include !! 357 include scripts/subarch.include
362 358
363 # Cross compiling and selecting different set 359 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 360 # ---------------------------------------------------------------------------
365 # 361 #
366 # When performing cross compilation for other 362 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 363 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 364 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 365 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 366 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 367 # The default ARCH is the host where make is executed.
372 368
373 # CROSS_COMPILE specify the prefix used for al 369 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 370 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 371 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 372 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 373 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 374 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 375 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 376 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 377 ARCH ?= $(SUBARCH)
382 378
383 # Architecture as present in compile.h 379 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 380 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 381 SRCARCH := $(ARCH)
386 382
387 # Additional ARCH settings for x86 383 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 384 ifeq ($(ARCH),i386)
389 SRCARCH := x86 385 SRCARCH := x86
390 endif 386 endif
391 ifeq ($(ARCH),x86_64) 387 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 388 SRCARCH := x86
393 endif 389 endif
394 390
395 # Additional ARCH settings for sparc 391 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 392 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 393 SRCARCH := sparc
398 endif 394 endif
399 ifeq ($(ARCH),sparc64) 395 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 396 SRCARCH := sparc
401 endif 397 endif
402 398
403 # Additional ARCH settings for parisc !! 399 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64) !! 400 ifeq ($(ARCH),sh64)
405 SRCARCH := parisc !! 401 SRCARCH := sh
406 endif <<
407 <<
408 export cross_compiling := <<
409 ifneq ($(SRCARCH),$(SUBARCH)) <<
410 cross_compiling := 1 <<
411 endif 402 endif
412 403
413 KCONFIG_CONFIG ?= .config 404 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 405 export KCONFIG_CONFIG
415 406
>> 407 # Default file for 'make defconfig'. This may be overridden by arch-Makefile.
>> 408 export KBUILD_DEFCONFIG := defconfig
>> 409
416 # SHELL used by kbuild 410 # SHELL used by kbuild
417 CONFIG_SHELL := sh 411 CONFIG_SHELL := sh
418 412
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 413 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 414 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 415 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 416
423 ifneq ($(LLVM),) 417 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),) !! 418 HOSTCC = clang
425 LLVM_PREFIX := $(LLVM) !! 419 HOSTCXX = clang++
426 else ifneq ($(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 420 else
433 HOSTCC = gcc 421 HOSTCC = gcc
434 HOSTCXX = g++ 422 HOSTCXX = g++
435 endif 423 endif
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config <<
438 424
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 425 export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440 -O2 -fomit-frame-poin !! 426 -O2 -fomit-frame-pointer -std=gnu89
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) !! 427 export KBUILD_USERLDFLAGS :=
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) !! 428
443 !! 429 KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
444 # These flags apply to all Rust code in the tr !! 430 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 431 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 432 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 433
471 # Make variables (CC, etc...) 434 # Make variables (CC, etc...)
472 CPP = $(CC) -E 435 CPP = $(CC) -E
473 ifneq ($(LLVM),) 436 ifneq ($(LLVM),)
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU !! 437 CC = clang
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S !! 438 LD = ld.lld
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ !! 439 AR = llvm-ar
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ !! 440 NM = llvm-nm
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( !! 441 OBJCOPY = llvm-objcopy
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( !! 442 OBJDUMP = llvm-objdump
480 READELF = $(LLVM_PREFIX)llvm-readelf$( !! 443 READELF = llvm-readelf
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL !! 444 STRIP = llvm-strip
482 else 445 else
483 CC = $(CROSS_COMPILE)gcc 446 CC = $(CROSS_COMPILE)gcc
484 LD = $(CROSS_COMPILE)ld 447 LD = $(CROSS_COMPILE)ld
485 AR = $(CROSS_COMPILE)ar 448 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 449 NM = $(CROSS_COMPILE)nm
487 OBJCOPY = $(CROSS_COMPILE)objcopy 450 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 451 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf 452 READELF = $(CROSS_COMPILE)readelf
490 STRIP = $(CROSS_COMPILE)strip 453 STRIP = $(CROSS_COMPILE)strip
491 endif 454 endif
492 RUSTC = rustc <<
493 RUSTDOC = rustdoc <<
494 RUSTFMT = rustfmt <<
495 CLIPPY_DRIVER = clippy-driver <<
496 BINDGEN = bindgen <<
497 PAHOLE = pahole 455 PAHOLE = pahole
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve 456 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX = flex 457 LEX = flex
500 YACC = bison 458 YACC = bison
501 AWK = awk 459 AWK = awk
502 INSTALLKERNEL := installkernel 460 INSTALLKERNEL := installkernel
>> 461 DEPMOD = depmod
503 PERL = perl 462 PERL = perl
>> 463 PYTHON = python
504 PYTHON3 = python3 464 PYTHON3 = python3
505 CHECK = sparse 465 CHECK = sparse
506 BASH = bash 466 BASH = bash
507 KGZIP = gzip 467 KGZIP = gzip
508 KBZIP2 = bzip2 468 KBZIP2 = bzip2
509 KLZOP = lzop 469 KLZOP = lzop
510 LZMA = lzma 470 LZMA = lzma
511 LZ4 = lz4c 471 LZ4 = lz4c
512 XZ = xz 472 XZ = xz
513 ZSTD = zstd 473 ZSTD = zstd
514 474
>> 475 PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
>> 476
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 477 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 478 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := 479 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE = 480 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 481 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 482 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 483 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 484 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 485 LDFLAGS_vmlinux =
526 486
527 # Use USERINCLUDE when you must reference the 487 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 488 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 489 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 490 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 491 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 492 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li <<
534 -include $(srctree)/include/li 493 -include $(srctree)/include/linux/kconfig.h
535 494
536 # Use LINUXINCLUDE when you must reference the 495 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 496 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 497 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 498 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 499 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree 500 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542 -I$(objtree)/include \ 501 -I$(objtree)/include \
543 $(USERINCLUDE) 502 $(USERINCLUDE)
544 503
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 504 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 !! 505 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS := !! 506 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11 !! 507 -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar !! 508 -Werror=return-type -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char !! 509 -std=gnu89
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 510 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ <<
557 -Cpanic=abort -Cembed-bitc <<
558 -Cforce-unwind-tables=n -C <<
559 -Csymbol-mangling-version= <<
560 -Crelocation-model=static <<
561 -Zfunction-sections=n \ <<
562 -Wclippy::float_arithmetic <<
563 <<
564 KBUILD_AFLAGS_KERNEL := 511 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 512 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 513 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 514 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE <<
570 KBUILD_LDFLAGS_MODULE := 515 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS := 516 KBUILD_LDFLAGS :=
572 CLANG_FLAGS := 517 CLANG_FLAGS :=
573 518
574 ifeq ($(KBUILD_CLIPPY),1) !! 519 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 ifdef RUST_LIB_SRC <<
583 export RUST_LIB_SRC <<
584 endif <<
585 <<
586 # Allows the usage of unstable features in sta <<
587 export RUSTC_BOOTSTRAP := 1 <<
588 <<
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K <<
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q <<
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS <<
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF 520 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ !! 521 export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD 522 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 523 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS <<
597 524
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 525 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 526 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF <<
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 527 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 528 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 529 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
>> 530 export PAHOLE_FLAGS
604 531
605 # Files to ignore in find ... statements 532 # Files to ignore in find ... statements
606 533
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 534 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 535 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 536 -prune -o
>> 537 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 538 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 539
611 # ============================================ 540 # ===========================================================================
612 # Rules shared between *config targets and bui 541 # Rules shared between *config targets and build targets
613 542
614 # Basic helpers built in scripts/basic/ 543 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic 544 PHONY += scripts_basic
616 scripts_basic: 545 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 546 $(Q)$(MAKE) $(build)=scripts/basic
>> 547 $(Q)rm -f .tmp_quiet_recordmcount
618 548
619 PHONY += outputmakefile 549 PHONY += outputmakefile
620 ifdef building_out_of_srctree <<
621 # Before starting out-of-tree build, make sure 550 # Before starting out-of-tree build, make sure the source tree is clean.
622 # outputmakefile generates a Makefile in the o 551 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 552 # separate output directory. This allows convenient use of make in the
624 # output directory. 553 # output directory.
625 # At the same time when output Makefile genera 554 # At the same time when output Makefile generated, generate .gitignore to
626 # ignore whole output directory 555 # ignore whole output directory
627 <<
628 quiet_cmd_makefile = GEN Makefile <<
629 cmd_makefile = { \ <<
630 echo "\# Automatically generated by $( <<
631 echo "include $(srctree)/Makefile"; \ <<
632 } > Makefile <<
633 <<
634 outputmakefile: 556 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ !! 557 ifdef building_out_of_srctree
>> 558 $(Q)if [ -f $(srctree)/.config -o \
636 -d $(srctree)/include/config 559 -d $(srctree)/include/config -o \
637 -d $(srctree)/arch/$(SRCARCH) 560 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
638 echo >&2 "***"; \ 561 echo >&2 "***"; \
639 echo >&2 "*** The source tree 562 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
640 echo >&2 "*** in $(abs_srctree 563 echo >&2 "*** in $(abs_srctree)";\
641 echo >&2 "***"; \ 564 echo >&2 "***"; \
642 false; \ 565 false; \
643 fi 566 fi
644 $(Q)ln -fsn $(srctree) source 567 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) !! 568 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
646 $(Q)test -e .gitignore || \ 569 $(Q)test -e .gitignore || \
647 { echo "# this is build directory, ign 570 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
648 endif 571 endif
649 572
>> 573 ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
>> 574 ifneq ($(CROSS_COMPILE),)
>> 575 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
>> 576 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
>> 577 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
>> 578 GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
>> 579 endif
>> 580 ifneq ($(GCC_TOOLCHAIN),)
>> 581 CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
>> 582 endif
>> 583 ifeq ($(LLVM_IAS),1)
>> 584 CLANG_FLAGS += -fintegrated-as
>> 585 else
>> 586 CLANG_FLAGS += -fno-integrated-as
>> 587 endif
>> 588 CLANG_FLAGS += -Werror=unknown-warning-option
>> 589 KBUILD_CFLAGS += $(CLANG_FLAGS)
>> 590 KBUILD_AFLAGS += $(CLANG_FLAGS)
>> 591 export CLANG_FLAGS
>> 592 endif
>> 593
650 # The expansion should be delayed until arch/$ 594 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a 595 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig ( 596 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det 597 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 598 CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
655 <<
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), <<
657 include $(srctree)/scripts/Makefile.clang <<
658 endif <<
659 <<
660 # Include this also for config targets because <<
661 # cc-cross-prefix to determine CROSS_COMPILE. <<
662 ifdef need-compiler <<
663 include $(srctree)/scripts/Makefile.compiler <<
664 endif <<
665 599
666 ifdef config-build 600 ifdef config-build
667 # ============================================ 601 # ===========================================================================
668 # *config targets only - make sure prerequisit 602 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 603 # in scripts/kconfig to make the *config target
670 604
671 # Read arch-specific Makefile to set KBUILD_DE !! 605 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 606 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 607 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile !! 608 include arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 609 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676 610
677 config: outputmakefile scripts_basic FORCE 611 config: outputmakefile scripts_basic FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 612 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 613
680 %config: outputmakefile scripts_basic FORCE 614 %config: outputmakefile scripts_basic FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 615 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 616
683 else #!config-build 617 else #!config-build
684 # ============================================ 618 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 619 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 620 # targets and others. In general all targets except *config targets.
687 621
688 # If building an external module we do not car 622 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules 623 # but instead __all depend on modules
690 PHONY += all 624 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),) 625 ifeq ($(KBUILD_EXTMOD),)
692 __all: all 626 __all: all
693 else 627 else
694 __all: modules 628 __all: modules
695 endif 629 endif
696 630
697 targets := <<
698 <<
699 # Decide whether to build built-in, modular, o 631 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in. 632 # Normally, just do built-in.
701 633
702 KBUILD_MODULES := 634 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1 635 KBUILD_BUILTIN := 1
704 636
705 # If we have only "make modules", don't compil 637 # If we have only "make modules", don't compile built-in objects.
706 ifeq ($(MAKECMDGOALS),modules) 638 ifeq ($(MAKECMDGOALS),modules)
707 KBUILD_BUILTIN := 639 KBUILD_BUILTIN :=
708 endif 640 endif
709 641
710 # If we have "make <whatever> modules", compil 642 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway. 643 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module 644 # Just "make" or "make all" shall build modules as well
713 645
714 ifneq ($(filter all modules nsdeps %compile_co 646 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 647 KBUILD_MODULES := 1
716 endif 648 endif
717 649
718 ifeq ($(MAKECMDGOALS),) 650 ifeq ($(MAKECMDGOALS),)
719 KBUILD_MODULES := 1 651 KBUILD_MODULES := 1
720 endif 652 endif
721 653
722 export KBUILD_MODULES KBUILD_BUILTIN 654 export KBUILD_MODULES KBUILD_BUILTIN
723 655
724 ifdef need-config 656 ifdef need-config
725 include include/config/auto.conf 657 include include/config/auto.conf
726 endif 658 endif
727 659
728 ifeq ($(KBUILD_EXTMOD),) 660 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs 661 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y := !! 662 core-y := init/ usr/
731 drivers-y := !! 663 drivers-y := drivers/ sound/
>> 664 drivers-$(CONFIG_SAMPLES) += samples/
>> 665 drivers-y += net/ virt/
732 libs-y := lib/ 666 libs-y := lib/
733 endif # KBUILD_EXTMOD 667 endif # KBUILD_EXTMOD
734 668
735 # The all: target is the default when no targe 669 # The all: target is the default when no target is given on the
736 # command line. 670 # command line.
737 # This allow a user to issue only 'make' to bu 671 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 672 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 673 all: vmlinux
740 674
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover !! 675 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
742 ifdef CONFIG_CC_IS_GCC !! 676 $(call cc-option,-fno-tree-loop-im) \
743 CFLAGS_GCOV += -fno-tree-loop-im !! 677 $(call cc-disable-warning,maybe-uninitialized,)
744 endif <<
745 export CFLAGS_GCOV 678 export CFLAGS_GCOV
746 679
747 # The arch Makefiles can override CC_FLAGS_FTR 680 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER 681 ifdef CONFIG_FUNCTION_TRACER
749 CC_FLAGS_FTRACE := -pg 682 CC_FLAGS_FTRACE := -pg
750 endif 683 endif
751 684
752 include $(srctree)/arch/$(SRCARCH)/Makefile !! 685 ifdef CONFIG_CC_IS_GCC
>> 686 RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
>> 687 RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch-cs-prefix)
>> 688 RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
>> 689 endif
>> 690 ifdef CONFIG_CC_IS_CLANG
>> 691 RETPOLINE_CFLAGS := -mretpoline-external-thunk
>> 692 RETPOLINE_VDSO_CFLAGS := -mretpoline
>> 693 endif
>> 694
>> 695 ifdef CONFIG_RETHUNK
>> 696 RETHUNK_CFLAGS := -mfunction-return=thunk-extern
>> 697 RETPOLINE_CFLAGS += $(RETHUNK_CFLAGS)
>> 698 endif
>> 699
>> 700 export RETPOLINE_CFLAGS
>> 701 export RETPOLINE_VDSO_CFLAGS
>> 702
>> 703 include arch/$(SRCARCH)/Makefile
753 704
754 ifdef need-config 705 ifdef need-config
755 ifdef may-sync-config 706 ifdef may-sync-config
756 # Read in dependencies to all Kconfig* files, 707 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include 708 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP 709 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd 710 include include/config/auto.conf.cmd
760 711
761 $(KCONFIG_CONFIG): 712 $(KCONFIG_CONFIG):
762 @echo >&2 '***' 713 @echo >&2 '***'
763 @echo >&2 '*** Configuration file "$@" 714 @echo >&2 '*** Configuration file "$@" not found!'
764 @echo >&2 '***' 715 @echo >&2 '***'
765 @echo >&2 '*** Please run some configu 716 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
766 @echo >&2 '*** "make menuconfig" or "m 717 @echo >&2 '*** "make menuconfig" or "make xconfig").'
767 @echo >&2 '***' 718 @echo >&2 '***'
768 @/bin/false 719 @/bin/false
769 720
770 # The actual configuration files used during t 721 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda 722 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con 723 # include/config/auto.conf (which mirrors .config).
773 # 724 #
774 # This exploits the 'multi-target pattern rule 725 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once 726 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b 727 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
777 # 728 #
778 # Do not use $(call cmd,...) here. That would 729 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
779 # so you cannot notice that Kconfig is waiting 730 # so you cannot notice that Kconfig is waiting for the user input.
780 %/config/auto.conf %/config/auto.conf.cmd %/ge !! 731 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
781 $(Q)$(kecho) " SYNC $@" 732 $(Q)$(kecho) " SYNC $@"
782 $(Q)$(MAKE) -f $(srctree)/Makefile syn 733 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config 734 else # !may-sync-config
784 # External modules and some install targets ne 735 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care 736 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test 737 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf 738 PHONY += include/config/auto.conf
788 739
789 include/config/auto.conf: 740 include/config/auto.conf:
790 @test -e include/generated/autoconf.h !! 741 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
791 echo >&2; 742 echo >&2; \
792 echo >&2 " ERROR: Kernel configuratio 743 echo >&2 " ERROR: Kernel configuration is invalid."; \
793 echo >&2 " include/generated/a 744 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
794 echo >&2 " Run 'make oldconfig 745 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
795 echo >&2 ; 746 echo >&2 ; \
796 /bin/false) 747 /bin/false)
797 748
798 endif # may-sync-config 749 endif # may-sync-config
799 endif # need-config 750 endif # need-config
800 751
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch !! 752 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
>> 753 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 754 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 755 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 756 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
802 757
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 758 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
804 KBUILD_CFLAGS += -O2 759 KBUILD_CFLAGS += -O2
805 KBUILD_RUSTFLAGS += -Copt-level=2 !! 760 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
>> 761 KBUILD_CFLAGS += -O3
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 762 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
807 KBUILD_CFLAGS += -Os 763 KBUILD_CFLAGS += -Os
808 KBUILD_RUSTFLAGS += -Copt-level=s <<
809 endif 764 endif
810 765
811 # Always set `debug-assertions` and `overflow- <<
812 # depends on `opt-level` and `debug-assertions <<
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( <<
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C <<
815 <<
816 # Tell gcc to never replace conditional load w 766 # Tell gcc to never replace conditional load with a non-conditional one
817 ifdef CONFIG_CC_IS_GCC <<
818 # gcc-10 renamed --param=allow-store-data-race <<
819 # -fno-allow-store-data-races. <<
820 KBUILD_CFLAGS += $(call cc-option,--param=al 767 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 768 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
822 endif <<
823 769
824 ifdef CONFIG_READABLE_ASM 770 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 771 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 772 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 773 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 774 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 775 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
>> 776 $(call cc-option,-fno-ipa-cp-clone,) \
>> 777 $(call cc-option,-fno-partial-inlining)
>> 778 endif
>> 779
>> 780 ifneq ($(CONFIG_FRAME_WARN),0)
>> 781 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
830 endif 782 endif
831 783
832 stackp-flags-y 784 stackp-flags-y := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR) 785 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 786 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
835 787
836 KBUILD_CFLAGS += $(stackp-flags-y) 788 KBUILD_CFLAGS += $(stackp-flags-y)
837 789
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 790 ifdef CONFIG_CC_IS_CLANG
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 791 KBUILD_CPPFLAGS += -Qunused-arguments
>> 792 KBUILD_CFLAGS += -Wno-format-invalid-specifier
>> 793 KBUILD_CFLAGS += -Wno-gnu
>> 794 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
>> 795 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>> 796 # See modpost pattern 2
>> 797 KBUILD_CFLAGS += -mno-global-merge
>> 798 else
>> 799
>> 800 # Warn about unmarked fall-throughs in switch statement.
>> 801 # Disabled for clang while comment to attribute conversion happens and
>> 802 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
>> 803 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
>> 804 endif
>> 805
>> 806 # These warnings generated too much noise in a regular build.
>> 807 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 808 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
>> 809
>> 810 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
>> 811
>> 812 # These result in bogus false positives
>> 813 KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
840 814
841 ifdef CONFIG_FRAME_POINTER 815 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 816 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 817 else
845 # Some targets (ARM with Thumb2, for example), 818 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 819 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 820 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 821 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 822 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER 823 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 824 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 825 endif
855 endif 826 endif
856 827
857 # Initialize all stack variables with a 0xAA p 828 # Initialize all stack variables with a 0xAA pattern.
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN 829 ifdef CONFIG_INIT_STACK_ALL_PATTERN
859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 830 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
860 endif 831 endif
861 832
862 # Initialize all stack variables with a zero v 833 # Initialize all stack variables with a zero value.
863 ifdef CONFIG_INIT_STACK_ALL_ZERO 834 ifdef CONFIG_INIT_STACK_ALL_ZERO
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer 835 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER 836 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
866 # https://github.com/llvm/llvm-project/issues/ 837 # https://github.com/llvm/llvm-project/issues/44842
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 838 KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER <<
869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA <<
870 endif 839 endif
871 endif 840 endif
872 841
873 # While VLAs have been removed, GCC produces u !! 842 DEBUG_CFLAGS :=
874 # for the randomize_kstack_offset feature. Dis <<
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac <<
876 843
877 # Clear used registers at func exit (to reduce !! 844 # Workaround for GCC versions < 5.0
878 ifdef CONFIG_ZERO_CALL_USED_REGS !! 845 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- !! 846 ifdef CONFIG_CC_IS_GCC
>> 847 DEBUG_CFLAGS += $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
880 endif 848 endif
881 849
>> 850 ifdef CONFIG_DEBUG_INFO
>> 851
>> 852 ifdef CONFIG_DEBUG_INFO_SPLIT
>> 853 DEBUG_CFLAGS += -gsplit-dwarf
>> 854 else
>> 855 DEBUG_CFLAGS += -g
>> 856 endif
>> 857
>> 858 ifdef CONFIG_AS_IS_LLVM
>> 859 KBUILD_AFLAGS += -g
>> 860 else
>> 861 KBUILD_AFLAGS += -Wa,-gdwarf-2
>> 862 endif
>> 863
>> 864 ifdef CONFIG_DEBUG_INFO_DWARF4
>> 865 DEBUG_CFLAGS += -gdwarf-4
>> 866 endif
>> 867
>> 868 ifdef CONFIG_DEBUG_INFO_REDUCED
>> 869 DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
>> 870 $(call cc-option,-fno-var-tracking)
>> 871 endif
>> 872
>> 873 ifdef CONFIG_DEBUG_INFO_COMPRESSED
>> 874 DEBUG_CFLAGS += -gz=zlib
>> 875 KBUILD_AFLAGS += -gz=zlib
>> 876 KBUILD_LDFLAGS += --compress-debug-sections=zlib
>> 877 endif
>> 878
>> 879 endif # CONFIG_DEBUG_INFO
>> 880
>> 881 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
>> 882 export DEBUG_CFLAGS
>> 883
882 ifdef CONFIG_FUNCTION_TRACER 884 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC !! 885 ifdef CONFIG_FTRACE_MCOUNT_RECORD
884 CC_FLAGS_FTRACE += -mrecord-mcount !! 886 # gcc 5 supports generating the mcount tables directly
>> 887 ifeq ($(call cc-option-yn,-mrecord-mcount),y)
>> 888 CC_FLAGS_FTRACE += -mrecord-mcount
>> 889 export CC_USING_RECORD_MCOUNT := 1
>> 890 endif
885 ifdef CONFIG_HAVE_NOP_MCOUNT 891 ifdef CONFIG_HAVE_NOP_MCOUNT
886 ifeq ($(call cc-option-yn, -mnop-mcount),y 892 ifeq ($(call cc-option-yn, -mnop-mcount),y)
887 CC_FLAGS_FTRACE += -mnop-mcount 893 CC_FLAGS_FTRACE += -mnop-mcount
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 894 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
889 endif 895 endif
890 endif 896 endif
891 endif 897 endif
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL <<
893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT <<
894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU <<
895 endif <<
896 endif <<
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT <<
898 ifdef CONFIG_HAVE_C_RECORDMCOUNT <<
899 BUILD_C_RECORDMCOUNT := y <<
900 export BUILD_C_RECORDMCOUNT <<
901 endif <<
902 endif <<
903 ifdef CONFIG_HAVE_FENTRY 898 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr <<
905 ifeq ($(call cc-option-yn, -mfentry),y) 899 ifeq ($(call cc-option-yn, -mfentry),y)
906 CC_FLAGS_FTRACE += -mfentry 900 CC_FLAGS_FTRACE += -mfentry
907 CC_FLAGS_USING += -DCC_USING_FENTRY 901 CC_FLAGS_USING += -DCC_USING_FENTRY
908 endif 902 endif
909 endif 903 endif
910 export CC_FLAGS_FTRACE 904 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 905 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 906 KBUILD_AFLAGS += $(CC_FLAGS_USING)
>> 907 ifdef CONFIG_DYNAMIC_FTRACE
>> 908 ifdef CONFIG_HAVE_C_RECORDMCOUNT
>> 909 BUILD_C_RECORDMCOUNT := y
>> 910 export BUILD_C_RECORDMCOUNT
>> 911 endif
>> 912 endif
913 endif 913 endif
914 914
915 # We trigger additional mismatches with less i 915 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 916 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 917 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif 918 endif
919 919
920 # `rustc`'s `-Zfunction-sections` applies to d <<
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 920 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 921 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections 922 LDFLAGS_vmlinux += --gc-sections
925 endif 923 endif
926 924
927 ifdef CONFIG_SHADOW_CALL_STACK 925 ifdef CONFIG_SHADOW_CALL_STACK
928 ifndef CONFIG_DYNAMIC_SCS <<
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac 926 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) 927 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
931 endif <<
932 export CC_FLAGS_SCS 928 export CC_FLAGS_SCS
933 endif 929 endif
934 930
935 ifdef CONFIG_LTO_CLANG !! 931 ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
936 ifdef CONFIG_LTO_CLANG_THIN !! 932 KBUILD_CFLAGS += -falign-functions=32
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit <<
938 else <<
939 CC_FLAGS_LTO := -flto <<
940 endif 933 endif
941 CC_FLAGS_LTO += -fvisibility=hidden <<
942 934
943 # Limit inlining across translation units to r !! 935 # arch Makefile may override CC so keep this after arch Makefile is included
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 !! 936 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
945 endif <<
946 937
947 ifdef CONFIG_LTO !! 938 # warn about C99 declaration after statement
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) !! 939 KBUILD_CFLAGS += -Wdeclaration-after-statement
949 KBUILD_AFLAGS += -fno-lto <<
950 export CC_FLAGS_LTO <<
951 endif <<
952 940
953 ifdef CONFIG_CFI_CLANG !! 941 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
954 CC_FLAGS_CFI := -fsanitize=kcfi !! 942 KBUILD_CFLAGS += -Wvla
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) <<
956 export CC_FLAGS_CFI <<
957 endif <<
958 943
959 # Architectures can define flags to add/remove !! 944 # disable pointer signed / unsigned warnings in gcc 4.0
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 945 KBUILD_CFLAGS += -Wno-pointer-sign
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 946
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) !! 947 # disable stringop warnings in gcc 8+
965 # Set the minimal function alignment. Use the !! 948 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
966 # -fmin-function-alignment if it is available, <<
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
970 else <<
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
972 endif <<
973 endif <<
974 949
975 # arch Makefile may override CC so keep this a !! 950 # We'll want to enable this eventually, but it's not going away for 5.7 at least
976 NOSTDINC_FLAGS += -nostdinc !! 951 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
>> 952 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
>> 953 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
>> 954
>> 955 # Another good warning that we'll want to enable eventually
>> 956 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
977 957
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 958 # Enabled with W=2, disabled by default as noisy
979 # the kernel uses only C99 flexible arrays for !! 959 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
980 # arrays. Enforce this for everything that may <<
981 # perform bounds checking. <<
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl <<
983 <<
984 #Currently, disable -Wstringop-overflow for GC <<
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW <<
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + <<
987 960
988 # disable invalid "can't wrap" optimizations f 961 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow 962 KBUILD_CFLAGS += -fno-strict-overflow
990 963
991 # Make sure -fstack-check isn't enabled (like 964 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check 965 KBUILD_CFLAGS += -fno-stack-check
993 966
994 # conserve stack if available 967 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC !! 968 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
996 KBUILD_CFLAGS += -fconserve-stack !! 969
997 endif !! 970 # Prohibit date/time macros, which would make the build non-deterministic
>> 971 KBUILD_CFLAGS += -Werror=date-time
>> 972
>> 973 # enforce correct pointer usage
>> 974 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>> 975
>> 976 # Require designated initializers for all marked structures
>> 977 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
998 978
999 # change __FILE__ to the relative path from th 979 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p 980 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001 981
1002 # include additional Makefiles when needed 982 # include additional Makefiles when needed
1003 include-y := scripts/Ma 983 include-y := scripts/Makefile.extrawarn
1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma <<
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma <<
1006 include-$(CONFIG_KASAN) += scripts/Ma 984 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
1007 include-$(CONFIG_KCSAN) += scripts/Ma 985 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
1008 include-$(CONFIG_KMSAN) += scripts/Ma <<
1009 include-$(CONFIG_UBSAN) += scripts/Ma 986 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
1010 include-$(CONFIG_KCOV) += scripts/Ma 987 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
1011 include-$(CONFIG_RANDSTRUCT) += scripts/Ma <<
1012 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma 988 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
1013 989
1014 include $(addprefix $(srctree)/, $(include-y) 990 include $(addprefix $(srctree)/, $(include-y))
1015 991
1016 # scripts/Makefile.gcc-plugins is intentional 992 # scripts/Makefile.gcc-plugins is intentionally included last.
1017 # Do not add $(call cc-option,...) below this 993 # Do not add $(call cc-option,...) below this line. When you build the kernel
1018 # from the clean source tree, the GCC plugins 994 # from the clean source tree, the GCC plugins do not exist at this point.
1019 995
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS !! 996 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) 997 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1022 KBUILD_AFLAGS += $(KAFLAGS) 998 KBUILD_AFLAGS += $(KAFLAGS)
1023 KBUILD_CFLAGS += $(KCFLAGS) 999 KBUILD_CFLAGS += $(KCFLAGS)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) <<
1025 1000
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 1001 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1027 LDFLAGS_vmlinux += --build-id=sha1 1002 LDFLAGS_vmlinux += --build-id=sha1
1028 1003
1029 KBUILD_LDFLAGS += -z noexecstack 1004 KBUILD_LDFLAGS += -z noexecstack
1030 ifeq ($(CONFIG_LD_IS_BFD),y) <<
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn 1005 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
1032 endif <<
1033 1006
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 1007 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X !! 1008 LDFLAGS_vmlinux += $(call ld-option, -X,)
1036 endif 1009 endif
1037 1010
1038 ifeq ($(CONFIG_RELR),y) 1011 ifeq ($(CONFIG_RELR),y)
1039 # ld.lld before 15 did not support -z pack-re !! 1012 LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1041 endif 1013 endif
1042 1014
1043 # We never want expected sections to be place 1015 # We never want expected sections to be placed heuristically by the
1044 # linker. All sections should be explicitly n 1016 # linker. All sections should be explicitly named in the linker script.
1045 ifdef CONFIG_LD_ORPHAN_WARN 1017 ifdef CONFIG_LD_ORPHAN_WARN
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG !! 1018 LDFLAGS_vmlinux += --orphan-handling=warn
1047 endif 1019 endif
1048 1020
1049 # Align the bit size of userspace programs wi 1021 # Align the bit size of userspace programs with the kernel
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta 1022 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta 1023 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1052 1024
1053 # make the checker run with the right archite 1025 # make the checker run with the right architecture
1054 CHECKFLAGS += --arch=$(ARCH) 1026 CHECKFLAGS += --arch=$(ARCH)
1055 1027
1056 # insure the checker run with the right endia 1028 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 1029 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058 1030
1059 # the checker needs the correct machine size 1031 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 1032 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061 1033
1062 # Default kernel image to build when no speci 1034 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 1035 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 1036 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 1037 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 1038 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 1039 export KBUILD_IMAGE ?= vmlinux
1068 1040
1069 # 1041 #
1070 # INSTALL_PATH specifies where to place the u 1042 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 1043 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 1044 export INSTALL_PATH ?= /boot
1073 1045
1074 # 1046 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 1047 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 1048 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 1049 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 1050 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 1051 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 1052
1081 # 1053 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 1054 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 1055 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 1056 # makefile but the argument can be passed to make if needed.
1085 # 1057 #
1086 1058
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 1059 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 1060 export MODLIB
1089 1061
>> 1062 #
>> 1063 # INSTALL_MOD_STRIP, if defined, will cause modules to be
>> 1064 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
>> 1065 # the default option --strip-debug will be used. Otherwise,
>> 1066 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
>> 1067
>> 1068 ifdef INSTALL_MOD_STRIP
>> 1069 ifeq ($(INSTALL_MOD_STRIP),1)
>> 1070 mod_strip_cmd = $(STRIP) --strip-debug
>> 1071 else
>> 1072 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
>> 1073 endif # INSTALL_MOD_STRIP=1
>> 1074 else
>> 1075 mod_strip_cmd = true
>> 1076 endif # INSTALL_MOD_STRIP
>> 1077 export mod_strip_cmd
>> 1078
>> 1079 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
>> 1080 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
>> 1081 # or CONFIG_MODULE_COMPRESS_XZ.
>> 1082
>> 1083 mod_compress_cmd = true
>> 1084 ifdef CONFIG_MODULE_COMPRESS
>> 1085 ifdef CONFIG_MODULE_COMPRESS_GZIP
>> 1086 mod_compress_cmd = $(KGZIP) -n -f
>> 1087 endif # CONFIG_MODULE_COMPRESS_GZIP
>> 1088 ifdef CONFIG_MODULE_COMPRESS_XZ
>> 1089 mod_compress_cmd = $(XZ) -f
>> 1090 endif # CONFIG_MODULE_COMPRESS_XZ
>> 1091 endif # CONFIG_MODULE_COMPRESS
>> 1092 export mod_compress_cmd
>> 1093
>> 1094 ifdef CONFIG_MODULE_SIG_ALL
>> 1095 $(eval $(call config_filename,MODULE_SIG_KEY))
>> 1096
>> 1097 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
>> 1098 else
>> 1099 mod_sign_cmd = true
>> 1100 endif
>> 1101 export mod_sign_cmd
>> 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
1090 PHONY += prepare0 1138 PHONY += prepare0
1091 1139
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 1140 export MODORDER := $(extmod-prefix)modules.order
1093 export MODORDER := $(extmod_prefix)modules.or !! 1141 export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
1094 export MODULES_NSDEPS := $(extmod_prefix)modu <<
1095 1142
1096 ifeq ($(KBUILD_EXTMOD),) 1143 ifeq ($(KBUILD_EXTMOD),)
>> 1144 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ io_uring/
>> 1145
>> 1146 vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
>> 1147 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 1148 $(libs-y) $(libs-m)))
1097 1149
1098 build-dir := . !! 1150 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1099 clean-dirs := $(sort . Documentation \ <<
1100 $(patsubst %/,%,$(filter 1151 $(patsubst %/,%,$(filter %/, $(core-) \
1101 $(drivers-) $(libs-)) 1152 $(drivers-) $(libs-))))
1102 1153
1103 export ARCH_CORE := $(core-y) !! 1154 build-dirs := $(vmlinux-dirs)
1104 export ARCH_LIB := $(filter %/, $(lib !! 1155 clean-dirs := $(vmlinux-alldirs)
1105 export ARCH_DRIVERS := $(drivers-y) $(dri <<
1106 # Externally visible symbols (used by link-vm <<
1107 1156
1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 1157 subdir-modorder := $(addsuffix /modules.order, $(build-dirs))
>> 1158
>> 1159 # Externally visible symbols (used by link-vmlinux.sh)
>> 1160 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
>> 1161 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1109 ifdef CONFIG_MODULES 1162 ifdef CONFIG_MODULES
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a 1163 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib 1164 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1112 else 1165 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, 1166 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1114 endif 1167 endif
>> 1168 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1115 1169
1116 export KBUILD_VMLINUX_LIBS !! 1170 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1117 export KBUILD_LDS := arch/$(SRCARCH) 1171 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 1172 # used by scripts/Makefile.package
>> 1173 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
>> 1174
>> 1175 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1118 1176
>> 1177 # Recurse until adjust_autoksyms.sh is satisfied
>> 1178 PHONY += autoksyms_recursive
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1179 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the 1180 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi 1181 # we have to build modules as well to determine what those symbols are.
>> 1182 # (this can be evaluated only once include/config/auto.conf has been included)
1122 KBUILD_MODULES := 1 1183 KBUILD_MODULES := 1
>> 1184
>> 1185 autoksyms_recursive: descend modules.order
>> 1186 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
>> 1187 "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
1123 endif 1188 endif
1124 1189
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1190 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1126 quiet_cmd_ar_vmlinux.a = AR $@ <<
1127 cmd_ar_vmlinux.a = \ <<
1128 rm -f $@; \ <<
1129 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS <<
1130 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) <<
1131 <<
1132 targets += vmlinux.a <<
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea <<
1134 $(call if_changed,ar_vmlinux.a) <<
1135 <<
1136 PHONY += vmlinux_o <<
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) <<
1138 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1139 1191
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1192 quiet_cmd_autoksyms_h = GEN $@
1141 @: !! 1193 cmd_autoksyms_h = mkdir -p $(dir $@); \
>> 1194 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
>> 1195
>> 1196 $(autoksyms_h):
>> 1197 $(call cmd,autoksyms_h)
>> 1198
>> 1199 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
>> 1200
>> 1201 # Final link of vmlinux with optional arch pass after final link
>> 1202 cmd_link-vmlinux = \
>> 1203 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
>> 1204 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
>> 1205
>> 1206 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
>> 1207 +$(call if_changed,link-vmlinux)
1142 1208
1143 PHONY += vmlinux !! 1209 targets := vmlinux
1144 # LDFLAGS_vmlinux in the top Makefile defines <<
1145 # not for decompressors. LDFLAGS_vmlinux in a <<
1146 # unrelated; the decompressors just happen to <<
1147 # arch/*/boot/compressed/vmlinux. <<
1148 # Export LDFLAGS_vmlinux only to scripts/Make <<
1149 # <<
1150 # _LDFLAGS_vmlinux is a workaround for the 'p <<
1151 # https://savannah.gnu.org/bugs/?61463 <<
1152 # For Make > 4.4, the following simple code w <<
1153 # vmlinux: private export LDFLAGS_vmlinux := <<
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG <<
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ <<
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost <<
1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1158 1210
1159 # The actual objects are generated when desce 1211 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1212 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1213 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1162 1214
1163 ifeq ($(origin KERNELRELEASE),file) !! 1215 filechk_kernel.release = \
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1216 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1165 else <<
1166 filechk_kernel.release = echo $(KERNELRELEASE <<
1167 endif <<
1168 1217
1169 # Store (new) KERNELRELEASE string in include 1218 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE 1219 include/config/kernel.release: FORCE
1171 $(call filechk,kernel.release) 1220 $(call filechk,kernel.release)
1172 1221
1173 # Additional helpers built in scripts/ 1222 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr 1223 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel 1224 # in parallel
1176 PHONY += scripts 1225 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc 1226 scripts: scripts_basic scripts_dtc
1178 $(Q)$(MAKE) $(build)=$(@) 1227 $(Q)$(MAKE) $(build)=$(@)
1179 1228
1180 # Things we need to do before we recursively 1229 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1230 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1231 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1232 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1233 # version.h and scripts_basic is processed / created.
1185 1234
1186 PHONY += prepare archprepare 1235 PHONY += prepare archprepare
1187 1236
1188 archprepare: outputmakefile archheaders archs 1237 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1189 asm-generic $(version_h) include/gene !! 1238 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1190 include/generated/compile.h include/g !! 1239 include/generated/autoconf.h
1191 1240
1192 prepare0: archprepare 1241 prepare0: archprepare
1193 $(Q)$(MAKE) $(build)=scripts/mod 1242 $(Q)$(MAKE) $(build)=scripts/mod
1194 $(Q)$(MAKE) $(build)=. prepare !! 1243 $(Q)$(MAKE) $(build)=.
1195 1244
1196 # All the preparing.. 1245 # All the preparing..
1197 prepare: prepare0 !! 1246 prepare: prepare0 prepare-objtool prepare-resolve_btfids
1198 ifdef CONFIG_RUST <<
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1200 $(Q)$(MAKE) $(build)=rust <<
1201 endif <<
1202 <<
1203 PHONY += remove-stale-files <<
1204 remove-stale-files: <<
1205 $(Q)$(srctree)/scripts/remove-stale-f <<
1206 1247
1207 # Support for using generic headers in asm-ge 1248 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1249 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209 1250
1210 PHONY += asm-generic uapi-asm-generic 1251 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic 1252 asm-generic: uapi-asm-generic
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1253 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1213 generic=include/asm-generic 1254 generic=include/asm-generic
1214 uapi-asm-generic: 1255 uapi-asm-generic:
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1256 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1216 generic=include/uapi/asm-generic 1257 generic=include/uapi/asm-generic
1217 1258
>> 1259 PHONY += prepare-objtool prepare-resolve_btfids
>> 1260 prepare-objtool: $(objtool_target)
>> 1261 ifeq ($(SKIP_STACK_VALIDATION),1)
>> 1262 ifdef CONFIG_UNWINDER_ORC
>> 1263 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1264 @false
>> 1265 else
>> 1266 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1267 endif
>> 1268 endif
>> 1269
>> 1270 prepare-resolve_btfids: $(resolve_btfids_target)
>> 1271 ifeq ($(ERROR_RESOLVE_BTFIDS),1)
>> 1272 @echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1273 @false
>> 1274 endif
1218 # Generate some files 1275 # Generate some files
1219 # ------------------------------------------- 1276 # ---------------------------------------------------------------------------
1220 1277
1221 # KERNELRELEASE can change from a few differe 1278 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1279 # needs to be updated, so this check is forced on all builds
1223 1280
1224 uts_len := 64 1281 uts_len := 64
1225 define filechk_utsrelease.h 1282 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1283 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1284 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1285 exit 1; \
1229 fi; 1286 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR 1287 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef 1288 endef
1232 1289
1233 define filechk_version.h 1290 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then 1291 if [ $(SUBLEVEL) -gt 255 ]; then \
1235 echo \#define LINUX_VERSION_C 1292 echo \#define LINUX_VERSION_CODE $(shell \
1236 expr $(VERSION) \* 65536 + $( 1293 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1237 else 1294 else \
1238 echo \#define LINUX_VERSION_C 1295 echo \#define LINUX_VERSION_CODE $(shell \
1239 expr $(VERSION) \* 65536 + $( 1296 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1240 fi; 1297 fi; \
1241 echo '#define KERNEL_VERSION(a,b,c) ( 1298 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
1242 ((c) > 255 ? 255 : (c)))'; !! 1299 ((c) > 255 ? 255 : (c)))'
1243 echo \#define LINUX_VERSION_MAJOR $(V <<
1244 echo \#define LINUX_VERSION_PATCHLEVE <<
1245 echo \#define LINUX_VERSION_SUBLEVEL <<
1246 endef 1300 endef
1247 1301
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1302 $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1249 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1303 $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
1250 $(version_h): FORCE 1304 $(version_h): FORCE
1251 $(call filechk,version.h) 1305 $(call filechk,version.h)
>> 1306 $(Q)rm -f $(old_version_h)
1252 1307
1253 include/generated/utsrelease.h: include/confi 1308 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1309 $(call filechk,utsrelease.h)
1255 1310
1256 filechk_compile.h = $(srctree)/scripts/mkcomp <<
1257 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION <<
1258 <<
1259 include/generated/compile.h: FORCE <<
1260 $(call filechk,compile.h) <<
1261 <<
1262 PHONY += headerdep 1311 PHONY += headerdep
1263 headerdep: 1312 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1313 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1314 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1315
1267 # ------------------------------------------- 1316 # ---------------------------------------------------------------------------
1268 # Kernel headers 1317 # Kernel headers
1269 1318
1270 #Default location for installed headers 1319 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1320 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1321
1273 quiet_cmd_headers_install = INSTALL $(INSTALL 1322 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1274 cmd_headers_install = \ 1323 cmd_headers_install = \
1275 mkdir -p $(INSTALL_HDR_PATH); \ 1324 mkdir -p $(INSTALL_HDR_PATH); \
1276 rsync -mrl --include='*/' --include=' 1325 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1277 usr/include $(INSTALL_HDR_PATH) 1326 usr/include $(INSTALL_HDR_PATH)
1278 1327
1279 PHONY += headers_install 1328 PHONY += headers_install
1280 headers_install: headers 1329 headers_install: headers
1281 $(call cmd,headers_install) 1330 $(call cmd,headers_install)
1282 1331
1283 PHONY += archheaders archscripts 1332 PHONY += archheaders archscripts
1284 1333
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he 1334 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1286 1335
1287 PHONY += headers 1336 PHONY += headers
1288 headers: $(version_h) scripts_unifdef uapi-as 1337 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1289 $(if $(filter um, $(SRCARCH)), $(erro !! 1338 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
>> 1339 $(error Headers not exportable for the $(SRCARCH) architecture))
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1340 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1341 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1292 1342
>> 1343 # Deprecated. It is no-op now.
>> 1344 PHONY += headers_check
>> 1345 headers_check:
>> 1346 @:
>> 1347
1293 ifdef CONFIG_HEADERS_INSTALL 1348 ifdef CONFIG_HEADERS_INSTALL
1294 prepare: headers 1349 prepare: headers
1295 endif 1350 endif
1296 1351
1297 PHONY += scripts_unifdef 1352 PHONY += scripts_unifdef
1298 scripts_unifdef: scripts_basic 1353 scripts_unifdef: scripts_basic
1299 $(Q)$(MAKE) $(build)=scripts scripts/ 1354 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1300 1355
1301 # ------------------------------------------- 1356 # ---------------------------------------------------------------------------
1302 # Install <<
1303 <<
1304 # Many distributions have the custom install <<
1305 # If DKMS is installed, 'make install' will e <<
1306 # to this Makefile to build and install exter <<
1307 # Cancel sub_make_done so that options such a <<
1308 <<
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) <<
1310 cmd_install = unset sub_make_done; $(sr <<
1311 <<
1312 # ------------------------------------------- <<
1313 # vDSO install <<
1314 <<
1315 PHONY += vdso_install <<
1316 vdso_install: export INSTALL_FILES = $(vdso-i <<
1317 vdso_install: <<
1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1319 <<
1320 # ------------------------------------------- <<
1321 # Tools <<
1322 <<
1323 ifdef CONFIG_OBJTOOL <<
1324 prepare: tools/objtool <<
1325 endif <<
1326 <<
1327 ifdef CONFIG_BPF <<
1328 ifdef CONFIG_DEBUG_INFO_BTF <<
1329 prepare: tools/bpf/resolve_btfids <<
1330 endif <<
1331 endif <<
1332 <<
1333 # The tools build system is not a part of Kbu <<
1334 # its own unique issues. If you need to integ <<
1335 # please consider locating that tool outside <<
1336 # standard Kbuild "hostprogs" syntax instead <<
1337 # here. See Documentation/kbuild/makefiles.rs <<
1338 <<
1339 PHONY += resolve_btfids_clean <<
1340 <<
1341 resolve_btfids_O = $(abspath $(objtree))/tool <<
1342 <<
1343 # tools/bpf/resolve_btfids directory might no <<
1344 # in output directory, skip its clean in that <<
1345 resolve_btfids_clean: <<
1346 ifneq ($(wildcard $(resolve_btfids_O)),) <<
1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ <<
1348 endif <<
1349 <<
1350 # Clear a bunch of variables before executing <<
1351 ifeq ($(quiet),silent_) <<
1352 tools_silent=s <<
1353 endif <<
1354 <<
1355 tools/: FORCE <<
1356 $(Q)mkdir -p $(objtree)/tools <<
1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1358 <<
1359 tools/%: FORCE <<
1360 $(Q)mkdir -p $(objtree)/tools <<
1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1362 <<
1363 # ------------------------------------------- <<
1364 # Kernel selftest 1357 # Kernel selftest
1365 1358
1366 PHONY += kselftest 1359 PHONY += kselftest
1367 kselftest: headers !! 1360 kselftest:
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1361 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369 1362
1370 kselftest-%: headers FORCE !! 1363 kselftest-%: FORCE
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi 1364 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1372 1365
1373 PHONY += kselftest-merge 1366 PHONY += kselftest-merge
1374 kselftest-merge: 1367 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1368 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1369 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1377 xargs $(srctree)/scripts/kcon !! 1370 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1371 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379 1372
1380 # ------------------------------------------- 1373 # ---------------------------------------------------------------------------
1381 # Devicetree files 1374 # Devicetree files
1382 1375
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1376 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts 1377 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif 1378 endif
1386 1379
1387 ifneq ($(dtstree),) 1380 ifneq ($(dtstree),)
1388 1381
1389 %.dtb: dtbs_prepare !! 1382 %.dtb: include/config/kernel.release scripts_dtc
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts <<
1391 <<
1392 %.dtbo: dtbs_prepare <<
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1383 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394 1384
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1385 PHONY += dtbs dtbs_install dtbs_check
1396 dtbs: dtbs_prepare !! 1386 dtbs: include/config/kernel.release scripts_dtc
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1387 $(Q)$(MAKE) $(build)=$(dtstree)
1398 <<
1399 # include/config/kernel.release is actually n <<
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) <<
1401 # dtbs_install depend on it as dtbs_install m <<
1402 dtbs_prepare: include/config/kernel.release s <<
1403 1388
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1389 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1405 export CHECK_DTBS=y 1390 export CHECK_DTBS=y
1406 endif !! 1391 dtbs: dt_binding_check
1407 <<
1408 ifneq ($(CHECK_DTBS),) <<
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif 1392 endif
1411 1393
1412 dtbs_check: dtbs 1394 dtbs_check: dtbs
1413 1395
1414 dtbs_install: 1396 dtbs_install:
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1397 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1416 1398
1417 ifdef CONFIG_OF_EARLY_FLATTREE 1399 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs 1400 all: dtbs
1419 endif 1401 endif
1420 1402
1421 endif 1403 endif
1422 1404
1423 PHONY += scripts_dtc 1405 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic 1406 scripts_dtc: scripts_basic
1425 $(Q)$(MAKE) $(build)=scripts/dtc 1407 $(Q)$(MAKE) $(build)=scripts/dtc
1426 1408
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO 1409 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1428 export CHECK_DTBS=y !! 1410 export CHECK_DT_BINDING=y
1429 endif 1411 endif
1430 1412
1431 PHONY += dt_binding_check dt_binding_schemas !! 1413 PHONY += dt_binding_check
1432 dt_binding_check: dt_binding_schemas scripts_ !! 1414 dt_binding_check: scripts_dtc
1433 $(Q)$(MAKE) $(build)=Documentation/de <<
1434 <<
1435 dt_binding_schemas: <<
1436 $(Q)$(MAKE) $(build)=Documentation/de 1415 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437 1416
1438 PHONY += dt_compatible_check <<
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 <<
1442 # ------------------------------------------- 1417 # ---------------------------------------------------------------------------
1443 # Modules 1418 # Modules
1444 1419
1445 ifdef CONFIG_MODULES 1420 ifdef CONFIG_MODULES
1446 1421
1447 # By default, build modules as well 1422 # By default, build modules as well
1448 1423
1449 all: modules 1424 all: modules
1450 1425
1451 # When we're building modules with modversion 1426 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as 1427 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo 1428 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS 1429 ifdef CONFIG_MODVERSIONS
1455 KBUILD_BUILTIN := 1 1430 KBUILD_BUILTIN := 1
1456 endif 1431 endif
1457 1432
1458 # Build modules 1433 # Build modules
1459 # 1434 #
>> 1435 # A module can be listed more than once in obj-m resulting in
>> 1436 # duplicate lines in modules.order files. Those are removed
>> 1437 # using awk while concatenating to the final file.
1460 1438
1461 # *.ko are usually independent of vmlinux, bu !! 1439 PHONY += modules
1462 # is an exception. !! 1440 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES !! 1441
1464 KBUILD_BUILTIN := 1 !! 1442 PHONY += modules_check
1465 modules: vmlinux !! 1443 modules_check: modules.order
1466 endif !! 1444 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
>> 1445
>> 1446 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1467 1447
1468 modules: modules_prepare !! 1448 modules.order: $(subdir-modorder) FORCE
>> 1449 $(call if_changed,modules_order)
>> 1450
>> 1451 targets += modules.order
1469 1452
1470 # Target to prepare building external modules 1453 # Target to prepare building external modules
>> 1454 PHONY += modules_prepare
1471 modules_prepare: prepare 1455 modules_prepare: prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ 1456 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1473 1457
>> 1458 modules_install: __modinst_pre
>> 1459 PHONY += __modinst_pre
>> 1460 __modinst_pre:
>> 1461 @rm -rf $(MODLIB)/kernel
>> 1462 @rm -f $(MODLIB)/source
>> 1463 @mkdir -p $(MODLIB)/kernel
>> 1464 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1465 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1466 rm -f $(MODLIB)/build ; \
>> 1467 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1468 fi
>> 1469 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
>> 1470 @cp -f modules.builtin $(MODLIB)/
>> 1471 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
>> 1472
>> 1473 ifeq ($(CONFIG_MODULE_SIG), y)
>> 1474 PHONY += modules_sign
>> 1475 modules_sign:
>> 1476 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
>> 1477 endif
>> 1478
1474 endif # CONFIG_MODULES 1479 endif # CONFIG_MODULES
1475 1480
1476 ### 1481 ###
1477 # Cleaning is done on three levels. 1482 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1483 # make clean Delete most generated files
1479 # Leave enough to build extern 1484 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1485 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1486 # make distclean Remove editor backup files, patch leftover files and the like
1482 1487
1483 # Directories & files removed with 'make clea 1488 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1489 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
1485 modules.builtin modules.builti 1490 modules.builtin modules.builtin.modinfo modules.nsdeps \
1486 compile_commands.json rust/tes !! 1491 compile_commands.json
1487 rust-project.json .vmlinux.obj <<
1488 1492
1489 # Directories & files removed with 'make mrpr 1493 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene 1494 MRPROPER_FILES += include/config include/generated \
1491 arch/$(SRCARCH)/include/gen !! 1495 arch/$(SRCARCH)/include/generated .tmp_objdiff \
1492 debian snap tar-install PKG !! 1496 debian snap tar-install \
1493 .config .config.old .versio 1497 .config .config.old .version \
1494 Module.symvers \ 1498 Module.symvers \
1495 certs/signing_key.pem \ !! 1499 signing_key.pem signing_key.priv signing_key.x509 \
1496 certs/x509.genkey \ !! 1500 x509.genkey extra_certificates signing_key.x509.keyid \
1497 vmlinux-gdb.py \ !! 1501 signing_key.x509.signer vmlinux-gdb.py \
1498 rpmbuild \ !! 1502 *.spec
1499 rust/libmacros.so !! 1503
>> 1504 # Directories & files removed with 'make distclean'
>> 1505 DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1500 1506
1501 # clean - Delete most, but leave enough to bu 1507 # clean - Delete most, but leave enough to build external modules
1502 # 1508 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1509 clean: rm-files := $(CLEAN_FILES)
1504 1510
1505 PHONY += archclean vmlinuxclean 1511 PHONY += archclean vmlinuxclean
1506 1512
1507 vmlinuxclean: 1513 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1514 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1515 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1516
1511 clean: archclean vmlinuxclean resolve_btfids_ 1517 clean: archclean vmlinuxclean resolve_btfids_clean
1512 1518
1513 # mrproper - Delete all generated files, incl 1519 # mrproper - Delete all generated files, including .config
1514 # 1520 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1521 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs := $(addprefix _mrproper_, 1522 mrproper-dirs := $(addprefix _mrproper_,scripts)
1517 1523
1518 PHONY += $(mrproper-dirs) mrproper 1524 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs): 1525 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1526 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1527
1522 mrproper: clean $(mrproper-dirs) 1528 mrproper: clean $(mrproper-dirs)
1523 $(call cmd,rmfiles) 1529 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 1530
1528 # distclean 1531 # distclean
1529 # 1532 #
>> 1533 distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
>> 1534
1530 PHONY += distclean 1535 PHONY += distclean
1531 1536
1532 distclean: mrproper 1537 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ !! 1538 $(call cmd,rmfiles)
>> 1539 @find $(srctree) $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1540 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* 1541 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536 -o -name 'core' -o -name tags !! 1542 -o -name 'core' \) \
1537 -o -name GPATH -o -name GRTAG <<
1538 -type f -print | xargs rm -f 1543 -type f -print | xargs rm -f
1539 1544
1540 1545
1541 # Packaging of the kernel to various formats 1546 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1547 # ---------------------------------------------------------------------------
1543 1548
1544 %src-pkg: FORCE 1549 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1550 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1546 %pkg: include/config/kernel.release FORCE 1551 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1552 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1548 1553
1549 # Brief documentation of the typical targets 1554 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1555 # ---------------------------------------------------------------------------
1551 1556
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1557 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1558 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1559 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1560 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1561
1557 PHONY += help 1562 PHONY += help
1558 help: 1563 help:
1559 @echo 'Cleaning targets:' 1564 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1565 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1566 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1567 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1568 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1569 @echo ''
>> 1570 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1571 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1572 @echo ''
1567 @echo 'Other generic targets:' 1573 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1574 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1575 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1576 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1577 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 1578 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1579 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1580 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1581 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1582 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1583 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1584 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1585 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1586 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1587 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1588 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1589 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1590 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1591 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1592 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1593 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1594 echo ''
1590 @echo 'Static analysers:' 1595 @echo 'Static analysers:'
1591 @echo ' checkstack - Generate !! 1596 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st <<
1593 @echo ' versioncheck - Sanity ch 1597 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1598 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1599 @echo ' export_report - List the usages of all exported symbols'
1596 @echo ' headerdep - Detect in 1600 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit 1601 @echo ' coccicheck - Check with Coccinelle'
1598 @echo ' clang-analyzer - Check wit 1602 @echo ' clang-analyzer - Check with clang static analyzer'
1599 @echo ' clang-tidy - Check wit 1603 @echo ' clang-tidy - Check with clang-tidy'
1600 @echo '' 1604 @echo ''
1601 @echo 'Tools:' 1605 @echo 'Tools:'
1602 @echo ' nsdeps - Generate 1606 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1603 @echo '' 1607 @echo ''
1604 @echo 'Kernel selftest:' 1608 @echo 'Kernel selftest:'
1605 @echo ' kselftest - Build a 1609 @echo ' kselftest - Build and run kernel selftest'
1606 @echo ' Build, 1610 @echo ' Build, install, and boot kernel before'
1607 @echo ' running 1611 @echo ' running kselftest on it'
1608 @echo ' Run as 1612 @echo ' Run as root for full coverage'
1609 @echo ' kselftest-all - Build k 1613 @echo ' kselftest-all - Build kernel selftest'
1610 @echo ' kselftest-install - Build a 1614 @echo ' kselftest-install - Build and install kernel selftest'
1611 @echo ' kselftest-clean - Remove 1615 @echo ' kselftest-clean - Remove all generated kselftest files'
1612 @echo ' kselftest-merge - Merge a 1616 @echo ' kselftest-merge - Merge all the config dependencies of'
1613 @echo ' kselfte 1617 @echo ' kselftest to existing .config.'
1614 @echo '' 1618 @echo ''
1615 @echo 'Rust targets:' <<
1616 @echo ' rustavailable - Checks wh <<
1617 @echo ' available <<
1618 @echo ' rustfmt - Reformat <<
1619 @echo ' rustfmtcheck - Checks if <<
1620 @echo ' is format <<
1621 @echo ' rustdoc - Generate <<
1622 @echo ' (requires <<
1623 @echo ' rusttest - Runs the <<
1624 @echo ' (requires <<
1625 @echo ' rust-analyzer - Generate <<
1626 @echo ' (requires <<
1627 @echo ' dir/file.[os] - Build spe <<
1628 @echo ' dir/file.rsi - Build mac <<
1629 @echo ' Run with <<
1630 @echo ' The outpu <<
1631 @echo ' dir/file.ll - Build the <<
1632 @echo '' <<
1633 @$(if $(dtstree), \ 1619 @$(if $(dtstree), \
1634 echo 'Devicetree:'; \ 1620 echo 'Devicetree:'; \
1635 echo '* dtbs - !! 1621 echo '* dtbs - Build device tree blobs for enabled boards'; \
1636 echo ' dtbs_install - !! 1622 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637 echo ' dt_binding_check - !! 1623 echo ' dt_binding_check - Validate device tree binding documents'; \
1638 echo ' dt_binding_schema - !! 1624 echo ' dtbs_check - Validate device tree source files';\
1639 echo ' dtbs_check - <<
1640 echo '') 1625 echo '')
1641 1626
1642 @echo 'Userspace tools targets:' 1627 @echo 'Userspace tools targets:'
1643 @echo ' use "make tools/help"' 1628 @echo ' use "make tools/help"'
1644 @echo ' or "cd tools; make help"' 1629 @echo ' or "cd tools; make help"'
1645 @echo '' 1630 @echo ''
1646 @echo 'Kernel packaging:' 1631 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi 1632 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1648 @echo '' 1633 @echo ''
1649 @echo 'Documentation targets:' 1634 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ 1635 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651 @echo '' 1636 @echo ''
1652 @echo 'Architecture-specific targets !! 1637 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ !! 1638 @$(if $(archhelp),$(archhelp),\
1654 echo ' No architecture-speci !! 1639 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1640 @echo ''
1656 @$(if $(boards), \ 1641 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1642 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % 1643 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1644 echo '')
1660 @$(if $(board-dirs), \ 1645 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1646 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1647 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1648 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1649 echo '')
1665 1650
1666 @echo ' make V=n [targets] 1: ver !! 1651 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667 @echo ' 2: giv !! 1652 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 1653 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check 1654 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1671 @echo ' (spars 1655 @echo ' (sparse by default)'
1672 @echo ' make C=2 [targets] Force 1656 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1657 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1658 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1659 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1660 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1661 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a <<
1680 @echo ' Multiple leve 1662 @echo ' Multiple levels can be combined with W=12 or W=123'
1681 @$(if $(dtstree), \ <<
1682 echo ' make CHECK_DTBS=1 [ta <<
1683 echo ' This can be ap <<
1684 ) <<
1685 @echo '' 1663 @echo ''
1686 @echo 'Execute "make" or "make all" 1664 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1665 @echo 'For further info see the ./README file'
1688 1666
1689 1667
1690 help-board-dirs := $(addprefix help-,$(board- 1668 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1669
1692 help-boards: $(help-board-dirs) 1670 help-boards: $(help-board-dirs)
1693 1671
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1672 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1673
1696 $(help-board-dirs): help-%: 1674 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1675 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1676 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1677 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1678 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1679 echo '')
1702 1680
1703 1681
1704 # Documentation targets 1682 # Documentation targets
1705 # ------------------------------------------- 1683 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1684 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707 linkcheckdocs dochelp refcheck !! 1685 linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS) 1686 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): 1687 $(DOC_TARGETS):
1710 $(Q)$(MAKE) $(build)=Documentation $@ 1688 $(Q)$(MAKE) $(build)=Documentation $@
1711 1689
1712 <<
1713 # Rust targets <<
1714 # ------------------------------------------- <<
1715 <<
1716 # "Is Rust available?" target <<
1717 PHONY += rustavailable <<
1718 rustavailable: <<
1719 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1720 <<
1721 # Documentation target <<
1722 # <<
1723 # Using the singular to avoid running afoul o <<
1724 PHONY += rustdoc <<
1725 rustdoc: prepare <<
1726 $(Q)$(MAKE) $(build)=rust $@ <<
1727 <<
1728 # Testing target <<
1729 PHONY += rusttest <<
1730 rusttest: prepare <<
1731 $(Q)$(MAKE) $(build)=rust $@ <<
1732 <<
1733 # Formatting targets <<
1734 PHONY += rustfmt rustfmtcheck <<
1735 <<
1736 # We skip `rust/alloc` since we want to minim <<
1737 # <<
1738 # We match using absolute paths since `find` <<
1739 # when matching, which is a problem when e.g. <<
1740 # We `grep` afterwards in order to remove the <<
1741 rustfmt: <<
1742 $(Q)find $(abs_srctree) -type f -name <<
1743 -o -path $(abs_srctree)/rust/ <<
1744 -o -path $(abs_objtree)/rust/ <<
1745 | grep -Fv $(abs_srctree)/rus <<
1746 | grep -Fv $(abs_objtree)/rus <<
1747 | grep -Fv generated \ <<
1748 | xargs $(RUSTFMT) $(rustfmt_ <<
1749 <<
1750 rustfmtcheck: rustfmt_flags = --check <<
1751 rustfmtcheck: rustfmt <<
1752 <<
1753 # Misc 1690 # Misc
1754 # ------------------------------------------- 1691 # ---------------------------------------------------------------------------
1755 1692
1756 PHONY += misc-check <<
1757 misc-check: <<
1758 $(Q)$(srctree)/scripts/misc-check <<
1759 <<
1760 all: misc-check <<
1761 <<
1762 PHONY += scripts_gdb 1693 PHONY += scripts_gdb
1763 scripts_gdb: prepare0 1694 scripts_gdb: prepare0
1764 $(Q)$(MAKE) $(build)=scripts/gdb 1695 $(Q)$(MAKE) $(build)=scripts/gdb
1765 $(Q)ln -fsn $(abspath $(srctree)/scri 1696 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1766 1697
1767 ifdef CONFIG_GDB_SCRIPTS 1698 ifdef CONFIG_GDB_SCRIPTS
1768 all: scripts_gdb 1699 all: scripts_gdb
1769 endif 1700 endif
1770 1701
1771 else # KBUILD_EXTMOD 1702 else # KBUILD_EXTMOD
1772 1703
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### 1704 ###
1776 # External module support. 1705 # External module support.
1777 # When building external modules the kernel u 1706 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1707 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1708 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands !! 1709 # in the basis kernel ordinary make commands (without M=...) must
>> 1710 # be used.
>> 1711 #
>> 1712 # The following are the only valid targets when building external
>> 1713 # modules.
>> 1714 # make M=dir clean Delete all automatically generated files
>> 1715 # make M=dir modules Make all modules in specified dir
>> 1716 # make M=dir Same as 'make M=dir modules'
>> 1717 # make M=dir modules_install
>> 1718 # Install the modules built in the module directory
>> 1719 # Assumes install directory is already created
1781 1720
1782 # We are always building only modules. 1721 # We are always building only modules.
1783 KBUILD_BUILTIN := 1722 KBUILD_BUILTIN :=
1784 KBUILD_MODULES := 1 1723 KBUILD_MODULES := 1
1785 1724
1786 build-dir := $(KBUILD_EXTMOD) !! 1725 build-dirs := $(KBUILD_EXTMOD)
>> 1726 $(MODORDER): descend
>> 1727 @:
1787 1728
1788 compile_commands.json: $(extmod_prefix)compil !! 1729 compile_commands.json: $(extmod-prefix)compile_commands.json
1789 PHONY += compile_commands.json 1730 PHONY += compile_commands.json
1790 1731
1791 clean-dirs := $(KBUILD_EXTMOD) 1732 clean-dirs := $(KBUILD_EXTMOD)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1733 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1793 $(KBUILD_EXTMOD)/compile_commands.jso 1734 $(KBUILD_EXTMOD)/compile_commands.json
1794 1735
1795 PHONY += prepare <<
1796 # now expand this into a simple variable to r <<
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT <<
1798 prepare: <<
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF <<
1800 echo >&2 "warning: the compil <<
1801 echo >&2 " The kernel was bu <<
1802 echo >&2 " You are using: <<
1803 fi <<
1804 <<
1805 PHONY += help 1736 PHONY += help
1806 help: 1737 help:
1807 @echo ' Building external modules.' 1738 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1739 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1740 @echo ''
1810 @echo ' modules - default t 1741 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1742 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1743 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1744 @echo ''
1815 1745
1816 ifndef CONFIG_MODULES !! 1746 # no-op for external module builds
1817 modules modules_install: __external_modules_e !! 1747 PHONY += prepare modules_prepare
1818 __external_modules_error: <<
1819 @echo >&2 '***' <<
1820 @echo >&2 '*** The present kernel dis <<
1821 @echo >&2 '*** You cannot build or in <<
1822 @echo >&2 '***' <<
1823 @false <<
1824 endif <<
1825 1748
1826 endif # KBUILD_EXTMOD 1749 endif # KBUILD_EXTMOD
1827 1750
1828 # ------------------------------------------- 1751 # ---------------------------------------------------------------------------
1829 # Modules 1752 # Modules
1830 1753
1831 PHONY += modules modules_install modules_sign !! 1754 PHONY += modules modules_install
1832 <<
1833 modules_install: <<
1834 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1835 sign-only=$(if $(filter modules_insta <<
1836 <<
1837 ifeq ($(CONFIG_MODULE_SIG),y) <<
1838 # modules_sign is a subset of modules_install <<
1839 # 'make modules_install modules_sign' is equi <<
1840 modules_sign: modules_install <<
1841 @: <<
1842 else <<
1843 modules_sign: <<
1844 @echo >&2 '***' <<
1845 @echo >&2 '*** CONFIG_MODULE_SIG is d <<
1846 @echo >&2 '***' <<
1847 @false <<
1848 endif <<
1849 1755
1850 ifdef CONFIG_MODULES 1756 ifdef CONFIG_MODULES
1851 1757
1852 $(MODORDER): $(build-dir) !! 1758 modules: $(MODORDER)
1853 @: !! 1759 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1854 1760
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t !! 1761 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1856 # This is solely useful to speed up test comp !! 1762 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1857 modules: modpost !! 1763 $(KERNELRELEASE)
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1859 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1860 endif <<
1861 1764
1862 PHONY += modules_check !! 1765 modules_install:
1863 modules_check: $(MODORDER) !! 1766 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1864 $(Q)$(CONFIG_SHELL) $(srctree)/script !! 1767 $(call cmd,depmod)
1865 1768
1866 else # CONFIG_MODULES 1769 else # CONFIG_MODULES
1867 1770
1868 modules: !! 1771 # Modules not configured
1869 @: !! 1772 # ---------------------------------------------------------------------------
>> 1773
>> 1774 modules modules_install:
>> 1775 @echo >&2 '***'
>> 1776 @echo >&2 '*** The present kernel configuration has modules disabled.'
>> 1777 @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
>> 1778 @echo >&2 '*** to enable CONFIG_MODULES.'
>> 1779 @echo >&2 '***'
>> 1780 @exit 1
1870 1781
1871 KBUILD_MODULES := 1782 KBUILD_MODULES :=
1872 1783
1873 endif # CONFIG_MODULES 1784 endif # CONFIG_MODULES
1874 1785
1875 PHONY += modpost <<
1876 modpost: $(if $(single-build),, $(if $(KBUILD <<
1877 $(if $(KBUILD_MODULES), modules_chec <<
1878 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1879 <<
1880 # Single targets 1786 # Single targets
1881 # ------------------------------------------- 1787 # ---------------------------------------------------------------------------
1882 # To build individual files in subdirectories 1788 # To build individual files in subdirectories, you can do like this:
1883 # 1789 #
1884 # make foo/bar/baz.s 1790 # make foo/bar/baz.s
1885 # 1791 #
1886 # The supported suffixes for single-target ar 1792 # The supported suffixes for single-target are listed in 'single-targets'
1887 # 1793 #
1888 # To build only under specific subdirectories 1794 # To build only under specific subdirectories, you can do like this:
1889 # 1795 #
1890 # make foo/bar/baz/ 1796 # make foo/bar/baz/
1891 1797
1892 ifdef single-build 1798 ifdef single-build
1893 1799
1894 # .ko is special because modpost is needed 1800 # .ko is special because modpost is needed
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG 1801 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1896 single-no-ko := $(filter-out $(single-ko), $( !! 1802 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1897 $(foreach x, o mod, $(patsubs <<
1898 1803
1899 $(single-ko): single_modules !! 1804 $(single-ko): single_modpost
1900 @: 1805 @:
1901 $(single-no-ko): $(build-dir) !! 1806 $(single-no-ko): descend
1902 @: 1807 @:
1903 1808
1904 # Remove MODORDER when done because it is not 1809 # Remove MODORDER when done because it is not the real one.
1905 PHONY += single_modules !! 1810 PHONY += single_modpost
1906 single_modules: $(single-no-ko) modules_prepa !! 1811 single_modpost: $(single-no-ko) modules_prepare
1907 $(Q){ $(foreach m, $(single-ko), echo !! 1812 $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1813 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1911 endif <<
1912 $(Q)rm -f $(MODORDER) 1814 $(Q)rm -f $(MODORDER)
1913 1815
1914 single-goals := $(addprefix $(build-dir)/, $( !! 1816 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1915 1817
1916 KBUILD_MODULES := 1 !! 1818 # trim unrelated directories
>> 1819 build-dirs := $(foreach d, $(build-dirs), \
>> 1820 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1917 1821
1918 endif 1822 endif
1919 1823
>> 1824 # Handle descending into subdirectories listed in $(build-dirs)
1920 # Preset locale variables to speed up the bui 1825 # Preset locale variables to speed up the build process. Limit locale
1921 # tweaks to this spot to avoid wrong language 1826 # tweaks to this spot to avoid wrong language settings when running
1922 # make menuconfig etc. 1827 # make menuconfig etc.
1923 # Error messages still appears in the origina 1828 # Error messages still appears in the original language
1924 PHONY += $(build-dir) !! 1829 PHONY += descend $(build-dirs)
1925 $(build-dir): prepare !! 1830 descend: $(build-dirs)
1926 $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1831 $(build-dirs): prepare
>> 1832 $(Q)$(MAKE) $(build)=$@ \
>> 1833 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
>> 1834 need-builtin=1 need-modorder=1
1927 1835
1928 clean-dirs := $(addprefix _clean_, $(clean-di 1836 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1929 PHONY += $(clean-dirs) clean 1837 PHONY += $(clean-dirs) clean
1930 $(clean-dirs): 1838 $(clean-dirs):
1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea 1839 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1932 1840
1933 clean: $(clean-dirs) 1841 clean: $(clean-dirs)
1934 $(call cmd,rmfiles) 1842 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1843 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name !! 1844 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ 1845 -o -name '*.ko.*' \
1938 -o -name '*.dtb' -o -name '*. !! 1846 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1939 -o -name '*.dtb.S' -o -name ' <<
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. 1847 -o -name '*.dwo' -o -name '*.lst' \
1942 -o -name '*.su' -o -name '*.m 1848 -o -name '*.su' -o -name '*.mod' \
1943 -o -name '.*.d' -o -name '.*. 1849 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' 1850 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945 -o -name '*.asn1.[ch]' \ 1851 -o -name '*.asn1.[ch]' \
1946 -o -name '*.symtypes' -o -nam 1852 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1853 -o -name '.tmp_*.o.*' \
1947 -o -name '*.c.[012]*.*' \ 1854 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 1855 -o -name '*.ll' \
1949 -o -name '*.gcno' \ !! 1856 -o -name '*.gcno' \) -type f -print | xargs rm -f
1950 -o -name '*.*.symversions' \) <<
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 1857
1954 # Generate tags for editors 1858 # Generate tags for editors
1955 # ------------------------------------------- 1859 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 1860 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t 1861 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1958 1862
1959 tags TAGS cscope gtags: FORCE 1863 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 1864 $(call cmd,tags)
1961 1865
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1968 $(Q)$(MAKE) $(build)=rust $@ <<
1969 <<
1970 # Script to generate missing namespace depend 1866 # Script to generate missing namespace dependencies
1971 # ------------------------------------------- 1867 # ---------------------------------------------------------------------------
1972 1868
1973 PHONY += nsdeps 1869 PHONY += nsdeps
1974 nsdeps: export KBUILD_NSDEPS=1 1870 nsdeps: export KBUILD_NSDEPS=1
1975 nsdeps: modules 1871 nsdeps: modules
1976 $(Q)$(CONFIG_SHELL) $(srctree)/script 1872 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1977 1873
1978 # Clang Tooling 1874 # Clang Tooling
1979 # ------------------------------------------- 1875 # ---------------------------------------------------------------------------
1980 1876
1981 quiet_cmd_gen_compile_commands = GEN $@ 1877 quiet_cmd_gen_compile_commands = GEN $@
1982 cmd_gen_compile_commands = $(PYTHON3) $ 1878 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1983 1879
1984 $(extmod_prefix)compile_commands.json: $(srct !! 1880 $(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1985 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K !! 1881 $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
1986 $(if $(CONFIG_MODULES), $(MODORDER)) 1882 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1987 $(call if_changed,gen_compile_command 1883 $(call if_changed,gen_compile_commands)
1988 1884
1989 targets += $(extmod_prefix)compile_commands.j !! 1885 targets += $(extmod-prefix)compile_commands.json
1990 1886
1991 PHONY += clang-tidy clang-analyzer 1887 PHONY += clang-tidy clang-analyzer
1992 1888
1993 ifdef CONFIG_CC_IS_CLANG 1889 ifdef CONFIG_CC_IS_CLANG
1994 quiet_cmd_clang_tools = CHECK $< 1890 quiet_cmd_clang_tools = CHECK $<
1995 cmd_clang_tools = $(PYTHON3) $(srctree) 1891 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1996 1892
1997 clang-tidy clang-analyzer: $(extmod_prefix)co !! 1893 clang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json
1998 $(call cmd,clang_tools) 1894 $(call cmd,clang_tools)
1999 else 1895 else
2000 clang-tidy clang-analyzer: 1896 clang-tidy clang-analyzer:
2001 @echo "$@ requires CC=clang" >&2 1897 @echo "$@ requires CC=clang" >&2
2002 @false 1898 @false
2003 endif 1899 endif
2004 1900
2005 # Scripts to check various things for consist 1901 # Scripts to check various things for consistency
2006 # ------------------------------------------- 1902 # ---------------------------------------------------------------------------
2007 1903
2008 PHONY += includecheck versioncheck coccicheck 1904 PHONY += includecheck versioncheck coccicheck export_report
2009 1905
2010 includecheck: 1906 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1907 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 1908 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 1909 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 1910
2015 versioncheck: 1911 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1912 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 1913 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 1914 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 1915
2020 coccicheck: 1916 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ 1917 $(Q)$(BASH) $(srctree)/scripts/$@
2022 1918
2023 export_report: 1919 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 1920 $(PERL) $(srctree)/scripts/export_report.pl
2025 1921
2026 PHONY += checkstack kernelrelease kernelversi 1922 PHONY += checkstack kernelrelease kernelversion image_name
2027 1923
2028 # UML needs a little special treatment here. 1924 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 1925 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 1926 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 1927 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 1928 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 1929 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 1930 else
2035 CHECKSTACK_ARCH := $(ARCH) 1931 CHECKSTACK_ARCH := $(ARCH)
2036 endif 1932 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 1933 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 1934 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 1935 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 1936
2042 kernelrelease: 1937 kernelrelease:
2043 @$(filechk_kernel.release) !! 1938 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044 1939
2045 kernelversion: 1940 kernelversion:
2046 @echo $(KERNELVERSION) 1941 @echo $(KERNELVERSION)
2047 1942
2048 image_name: 1943 image_name:
2049 @echo $(KBUILD_IMAGE) 1944 @echo $(KBUILD_IMAGE)
2050 1945
2051 PHONY += run-command !! 1946 # Clear a bunch of variables before executing the submake
2052 run-command: !! 1947
2053 $(Q)$(KBUILD_RUN_COMMAND) !! 1948 ifeq ($(quiet),silent_)
>> 1949 tools_silent=s
>> 1950 endif
>> 1951
>> 1952 tools/: FORCE
>> 1953 $(Q)mkdir -p $(objtree)/tools
>> 1954 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
>> 1955
>> 1956 tools/%: FORCE
>> 1957 $(Q)mkdir -p $(objtree)/tools
>> 1958 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
2054 1959
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1960 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) 1961 cmd_rmfiles = rm -rf $(rm-files)
2057 1962
2058 # read saved command lines for existing targe 1963 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe 1964 existing-targets := $(wildcard $(sort $(targets)))
2060 1965
2061 -include $(foreach f,$(existing-targets),$(di 1966 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062 1967
2063 endif # config-build 1968 endif # config-build
2064 endif # mixed-build 1969 endif # mixed-build
2065 endif # need-sub-make 1970 endif # need-sub-make
2066 1971
2067 PHONY += FORCE 1972 PHONY += FORCE
2068 FORCE: 1973 FORCE:
2069 1974
2070 # Declare the contents of the PHONY variable 1975 # Declare the contents of the PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 1976 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 1977 .PHONY: $(PHONY)
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