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 = 6
4 SUBLEVEL = 5 !! 4 SUBLEVEL = 19
5 EXTRAVERSION = 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Kleptomaniac Octopus
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)), \ <<
19 $(error targets prefixed with '__' are <<
20 <<
21 # That's our default target when none is given 14 # That's our default target when none is given on the command line
22 PHONY := __all !! 15 PHONY := _all
23 __all: !! 16 _all:
24 17
25 # We are using a recursive build, so we need t 18 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 19 # to get the ordering right.
27 # 20 #
28 # Most importantly: sub-Makefiles should only 21 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 22 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 23 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 24 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 25 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 26 # after that we are sure that everything which is in that other dir
34 # is now up to date. 27 # is now up to date.
35 # 28 #
36 # The only cases where we need to modify files 29 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 30 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 31 # descending is started. They are now explicitly listed as the
39 # prepare rule. 32 # prepare rule.
40 33
41 this-makefile := $(lastword $(MAKEFILE_LIST)) <<
42 abs_srctree := $(realpath $(dir $(this-makefil <<
43 abs_objtree := $(CURDIR) <<
44 <<
45 ifneq ($(sub_make_done),1) 34 ifneq ($(sub_make_done),1)
46 35
47 # Do not use make's built-in rules and variabl 36 # Do not use make's built-in rules and variables
48 # (this increases performance and avoids hard- 37 # (this increases performance and avoids hard-to-debug behaviour)
49 MAKEFLAGS += -rR 38 MAKEFLAGS += -rR
50 39
51 # Avoid funny character set dependencies 40 # Avoid funny character set dependencies
52 unexport LC_ALL 41 unexport LC_ALL
53 LC_COLLATE=C 42 LC_COLLATE=C
54 LC_NUMERIC=C 43 LC_NUMERIC=C
55 export LC_COLLATE LC_NUMERIC 44 export LC_COLLATE LC_NUMERIC
56 45
57 # Avoid interference with shell env settings 46 # Avoid interference with shell env settings
58 unexport GREP_OPTIONS 47 unexport GREP_OPTIONS
59 48
60 # Beautify output 49 # Beautify output
61 # -------------------------------------------- 50 # ---------------------------------------------------------------------------
62 # 51 #
63 # Most of build commands in Kbuild start with !! 52 # Normally, we echo the whole command before executing it. By making
64 # "quiet_cmd_*". If defined, the short log is !! 53 # that echo $($(quiet)$(cmd)), we now have the possibility to set
65 # that command is printed by default. !! 54 # $(quiet) to choose other forms of output instead, e.g.
66 # !! 55 #
67 # e.g.) !! 56 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 57 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
69 # cmd_depmod = $(srctree)/scripts/dep !! 58 #
>> 59 # If $(quiet) is empty, the whole command will be printed.
>> 60 # If it is set to "quiet_", only the short version will be printed.
>> 61 # If it is set to "silent_", nothing will be printed at all, since
>> 62 # the variable $(silent_cmd_cc_o_c) doesn't exist.
70 # 63 #
71 # A simple variant is to prefix commands with 64 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 65 # for commands that shall be hidden in non-verbose mode.
73 # 66 #
74 # $(Q)$(MAKE) $(build)=scripts/basic !! 67 # $(Q)ln $@ :<
75 # 68 #
76 # If KBUILD_VERBOSE contains 1, the whole comm !! 69 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
77 # If KBUILD_VERBOSE contains 2, the reason for !! 70 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
>> 71 # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
78 # 72 #
79 # To put more focus on warnings, be less verbo 73 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 74 # Use 'make V=1' to see the full commands
81 75
82 ifeq ("$(origin V)", "command line") 76 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 77 KBUILD_VERBOSE = $(V)
84 endif 78 endif
>> 79 ifndef KBUILD_VERBOSE
>> 80 KBUILD_VERBOSE = 0
>> 81 endif
85 82
86 quiet = quiet_ !! 83 ifeq ($(KBUILD_VERBOSE),1)
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = 84 quiet =
91 Q = 85 Q =
>> 86 else
>> 87 quiet=quiet_
>> 88 Q = @
92 endif 89 endif
93 90
94 # If the user is running make -s (silent mode) 91 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 92 # commands
96 ifneq ($(findstring s,$(firstword -$(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 $(error module directory path cannot c <<
142 <<
143 # Remove trailing slashes <<
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) <<
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM <<
146 endif <<
147 <<
148 export KBUILD_EXTMOD <<
149 <<
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 93
153 ifeq ("$(origin W)", "command line") !! 94 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
154 KBUILD_EXTRA_WARN := $(W) !! 95 quiet=silent_
155 endif 96 endif
156 97
157 export KBUILD_EXTRA_WARN !! 98 export quiet Q KBUILD_VERBOSE
158 99
159 # Kbuild will save output files in the current 100 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t 101 # This does not need to match to the root of the kernel source tree.
161 # 102 #
162 # For example, you can do this: 103 # For example, you can do this:
163 # 104 #
164 # cd /dir/to/store/output/files; make -f /dir 105 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 # 106 #
166 # If you want to save output files in a differ 107 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it. 108 # two syntaxes to specify it.
168 # 109 #
169 # 1) O= 110 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 111 # Use "make O=dir/to/store/output/files/"
171 # 112 #
172 # 2) Set KBUILD_OUTPUT 113 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t 114 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil 115 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 # 116 #
176 # The O= assignment takes precedence over the 117 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 118 # variable.
178 119
179 # Do we want to change the working directory? 120 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line") 121 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 122 KBUILD_OUTPUT := $(O)
182 endif 123 endif
183 124
184 ifneq ($(KBUILD_OUTPUT),) 125 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does !! 126 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 127 # expand a shell special character '~'. We use a somewhat tedious way here.
>> 128 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
>> 129 $(if $(abs_objtree),, \
>> 130 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
>> 131
187 # $(realpath ...) resolves symlinks 132 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) !! 133 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create !! 134 else
>> 135 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),) 136 endif # ifneq ($(KBUILD_OUTPUT),)
191 137
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 138 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 139 # Suppress "Entering directory ..." unless we are changing the work directory.
>> 140 MAKEFLAGS += --no-print-directory
>> 141 else
>> 142 need-sub-make := 1
194 endif 143 endif
195 144
196 export sub_make_done := 1 !! 145 abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
197 146
198 endif # sub_make_done !! 147 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
>> 148 $(error source directory cannot contain spaces or colons)
>> 149 endif
199 150
200 ifeq ($(abs_objtree),$(CURDIR)) !! 151 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are !! 152 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory !! 153 #
203 else !! 154 # This does not become effective immediately because MAKEFLAGS is re-parsed
204 # Recursion to show "Entering directory ..." !! 155 # once after the Makefile is read. We need to invoke sub-make.
>> 156 MAKEFLAGS += --include-dir=$(abs_srctree)
205 need-sub-make := 1 157 need-sub-make := 1
206 endif 158 endif
207 159
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 160 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 161 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 162 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
211 # behavior change in GNU Make 4.4.1. <<
212 need-sub-make := 1 163 need-sub-make := 1
>> 164 # Cancel implicit rules for this Makefile.
>> 165 $(lastword $(MAKEFILE_LIST)): ;
213 endif 166 endif
214 167
>> 168 export abs_srctree abs_objtree
>> 169 export sub_make_done := 1
>> 170
215 ifeq ($(need-sub-make),1) 171 ifeq ($(need-sub-make),1)
216 172
217 PHONY += $(MAKECMDGOALS) __sub-make !! 173 PHONY += $(MAKECMDGOALS) sub-make
218 174
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 175 $(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
220 @: 176 @:
221 177
222 # Invoke a second make in the output directory 178 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: !! 179 sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 180 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225 -f $(abs_srctree)/Makefile $(MAKECMDGO <<
226 181
227 else # need-sub-make !! 182 endif # need-sub-make
>> 183 endif # sub_make_done
228 184
229 # We process the rest of the Makefile if this 185 # We process the rest of the Makefile if this is the final invocation of make
>> 186 ifeq ($(need-sub-make),)
>> 187
>> 188 # Do not print "Entering directory ...",
>> 189 # but we want to display it when entering to the output directory
>> 190 # so that IDEs/editors are able to understand relative filenames.
>> 191 MAKEFLAGS += --no-print-directory
>> 192
>> 193 # Call a source code checker (by default, "sparse") as part of the
>> 194 # C compilation.
>> 195 #
>> 196 # Use 'make C=1' to enable checking of only re-compiled files.
>> 197 # Use 'make C=2' to enable checking of *all* source files, regardless
>> 198 # of whether they are re-compiled or not.
>> 199 #
>> 200 # See the file "Documentation/dev-tools/sparse.rst" for more details,
>> 201 # including where to get the "sparse" utility.
>> 202
>> 203 ifeq ("$(origin C)", "command line")
>> 204 KBUILD_CHECKSRC = $(C)
>> 205 endif
>> 206 ifndef KBUILD_CHECKSRC
>> 207 KBUILD_CHECKSRC = 0
>> 208 endif
>> 209
>> 210 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
>> 211 # directory of external module to build. Setting M= takes precedence.
>> 212 ifeq ("$(origin M)", "command line")
>> 213 KBUILD_EXTMOD := $(M)
>> 214 endif
>> 215
>> 216 export KBUILD_CHECKSRC KBUILD_EXTMOD
>> 217
>> 218 extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
230 219
231 ifeq ($(abs_srctree),$(abs_objtree)) 220 ifeq ($(abs_srctree),$(abs_objtree))
232 # building in the source tree 221 # building in the source tree
233 srctree := . 222 srctree := .
234 building_out_of_srctree := 223 building_out_of_srctree :=
235 else 224 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt 225 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237 # building in a subdirectory o 226 # building in a subdirectory of the source tree
238 srctree := .. 227 srctree := ..
239 else 228 else
240 srctree := $(abs_srctree) 229 srctree := $(abs_srctree)
241 endif 230 endif
242 building_out_of_srctree := 1 231 building_out_of_srctree := 1
243 endif 232 endif
244 233
245 ifneq ($(KBUILD_ABS_SRCTREE),) 234 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree) 235 srctree := $(abs_srctree)
247 endif 236 endif
248 237
249 objtree := . 238 objtree := .
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 239 VPATH := $(srctree)
256 endif <<
257 endif <<
258 240
259 export building_out_of_srctree srctree objtree 241 export building_out_of_srctree srctree objtree VPATH
260 242
261 # To make sure we do not include .config for a 243 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 244 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 245 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 246 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 247 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 248 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 249 # of make so .config is not included in this case either (for *config).
268 250
269 version_h := include/generated/uapi/linux/vers 251 version_h := include/generated/uapi/linux/version.h
>> 252 old_version_h := include/linux/version.h
270 253
271 clean-targets := %clean mrproper cleandocs 254 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 255 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 256 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers 257 $(version_h) headers headers_% archheaders archscripts \
275 %asm-generic kernelve !! 258 %asm-generic kernelversion %src-pkg
276 outputmakefile rustav !! 259 no-sync-config-targets := $(no-dot-config-targets) install %install \
277 no-sync-config-targets := $(no-dot-config-targ !! 260 kernelrelease
278 image_name !! 261 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls <<
280 262
281 config-build := 263 config-build :=
282 mixed-build := 264 mixed-build :=
283 need-config := 1 265 need-config := 1
284 may-sync-config := 1 266 may-sync-config := 1
285 single-build := 267 single-build :=
286 268
287 ifneq ($(filter $(no-dot-config-targets), $(MA 269 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 270 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 271 need-config :=
290 endif !! 272 endif
291 endif 273 endif
292 274
293 ifneq ($(filter $(no-sync-config-targets), $(M 275 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 276 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 277 may-sync-config :=
296 endif !! 278 endif
297 endif 279 endif
298 280
299 need-compiler := $(may-sync-config) <<
300 <<
301 ifneq ($(KBUILD_EXTMOD),) 281 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 282 may-sync-config :=
303 endif 283 endif
304 284
305 ifeq ($(KBUILD_EXTMOD),) 285 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 286 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 287 config-build := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 288 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 289 mixed-build := 1
>> 290 endif
310 endif 291 endif
311 endif <<
312 endif 292 endif
313 293
314 # We cannot build single targets and the other 294 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO 295 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 single-build := 1 !! 296 single-build := 1
317 ifneq ($(filter-out $(single-targets), $(M !! 297 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318 mixed-build := 1 !! 298 mixed-build := 1
319 endif !! 299 endif
320 endif 300 endif
321 301
322 # For "make -j clean all", "make -j mrproper d 302 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 303 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 304 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 305 mixed-build := 1
326 endif !! 306 endif
327 endif 307 endif
328 308
329 # install and modules_install need also be pro 309 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 310 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 311 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 312 mixed-build := 1
333 endif !! 313 endif
334 endif 314 endif
335 315
336 ifdef mixed-build 316 ifdef mixed-build
337 # ============================================ 317 # ===========================================================================
338 # We're called with mixed targets (*config and 318 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 319 # Handle them one by one.
340 320
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 321 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 322
343 $(MAKECMDGOALS): __build_one_by_one !! 323 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
344 @: 324 @:
345 325
346 __build_one_by_one: 326 __build_one_by_one:
347 $(Q)set -e; \ 327 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 328 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 329 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 330 done
351 331
352 else # !mixed-build 332 else # !mixed-build
353 333
354 include $(srctree)/scripts/Kbuild.include !! 334 include scripts/Kbuild.include
355 335
356 # Read KERNELRELEASE from include/config/kerne 336 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 337 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 338 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 339 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 340
361 include $(srctree)/scripts/subarch.include !! 341 include scripts/subarch.include
362 342
363 # Cross compiling and selecting different set 343 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 344 # ---------------------------------------------------------------------------
365 # 345 #
366 # When performing cross compilation for other 346 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 347 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 348 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 349 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 350 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 351 # The default ARCH is the host where make is executed.
372 352
373 # CROSS_COMPILE specify the prefix used for al 353 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 354 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 355 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 356 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 357 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 358 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 359 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 360 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 361 ARCH ?= $(SUBARCH)
382 362
383 # Architecture as present in compile.h 363 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 364 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 365 SRCARCH := $(ARCH)
386 366
387 # Additional ARCH settings for x86 367 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 368 ifeq ($(ARCH),i386)
389 SRCARCH := x86 369 SRCARCH := x86
390 endif 370 endif
391 ifeq ($(ARCH),x86_64) 371 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 372 SRCARCH := x86
393 endif 373 endif
394 374
395 # Additional ARCH settings for sparc 375 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 376 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 377 SRCARCH := sparc
398 endif 378 endif
399 ifeq ($(ARCH),sparc64) 379 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 380 SRCARCH := sparc
401 endif 381 endif
402 382
403 # Additional ARCH settings for parisc !! 383 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64) !! 384 ifeq ($(ARCH),sh64)
405 SRCARCH := parisc !! 385 SRCARCH := sh
406 endif <<
407 <<
408 export cross_compiling := <<
409 ifneq ($(SRCARCH),$(SUBARCH)) <<
410 cross_compiling := 1 <<
411 endif 386 endif
412 387
413 KCONFIG_CONFIG ?= .config 388 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 389 export KCONFIG_CONFIG
415 390
416 # SHELL used by kbuild 391 # SHELL used by kbuild
417 CONFIG_SHELL := sh 392 CONFIG_SHELL := sh
418 393
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 394 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 395 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 396 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 397
423 ifneq ($(LLVM),) !! 398 HOSTCC = gcc
424 ifneq ($(filter %/,$(LLVM)),) !! 399 HOSTCXX = g++
425 LLVM_PREFIX := $(LLVM) !! 400 KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
426 else ifneq ($(filter -%,$(LLVM)),) !! 401 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
427 LLVM_SUFFIX := $(LLVM) !! 402 $(HOSTCFLAGS)
428 endif !! 403 KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
429 <<
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) <<
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) <<
432 else <<
433 HOSTCC = gcc <<
434 HOSTCXX = g++ <<
435 endif <<
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config <<
438 <<
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto <<
440 -O2 -fomit-frame-poin <<
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) <<
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) <<
443 <<
444 # These flags apply to all Rust code in the tr <<
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 404 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 405 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 406
471 # Make variables (CC, etc...) 407 # Make variables (CC, etc...)
472 CPP = $(CC) -E !! 408 AS = $(CROSS_COMPILE)as
473 ifneq ($(LLVM),) <<
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU <<
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S <<
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ <<
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ <<
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( <<
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( <<
480 READELF = $(LLVM_PREFIX)llvm-readelf$( <<
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL <<
482 else <<
483 CC = $(CROSS_COMPILE)gcc <<
484 LD = $(CROSS_COMPILE)ld 409 LD = $(CROSS_COMPILE)ld
>> 410 CC = $(CROSS_COMPILE)gcc
>> 411 CPP = $(CC) -E
485 AR = $(CROSS_COMPILE)ar 412 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 413 NM = $(CROSS_COMPILE)nm
>> 414 STRIP = $(CROSS_COMPILE)strip
487 OBJCOPY = $(CROSS_COMPILE)objcopy 415 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 416 OBJDUMP = $(CROSS_COMPILE)objdump
>> 417 OBJSIZE = $(CROSS_COMPILE)size
489 READELF = $(CROSS_COMPILE)readelf 418 READELF = $(CROSS_COMPILE)readelf
490 STRIP = $(CROSS_COMPILE)strip <<
491 endif <<
492 RUSTC = rustc <<
493 RUSTDOC = rustdoc <<
494 RUSTFMT = rustfmt <<
495 CLIPPY_DRIVER = clippy-driver <<
496 BINDGEN = bindgen <<
497 PAHOLE = pahole 419 PAHOLE = pahole
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve <<
499 LEX = flex 420 LEX = flex
500 YACC = bison 421 YACC = bison
501 AWK = awk 422 AWK = awk
502 INSTALLKERNEL := installkernel 423 INSTALLKERNEL := installkernel
>> 424 DEPMOD = /sbin/depmod
503 PERL = perl 425 PERL = perl
>> 426 PYTHON = python
504 PYTHON3 = python3 427 PYTHON3 = python3
505 CHECK = sparse 428 CHECK = sparse
506 BASH = bash 429 BASH = bash
507 KGZIP = gzip <<
508 KBZIP2 = bzip2 <<
509 KLZOP = lzop <<
510 LZMA = lzma <<
511 LZ4 = lz4c <<
512 XZ = xz <<
513 ZSTD = zstd <<
514 430
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 431 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 432 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := 433 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE = 434 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 435 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 436 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 437 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 438 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 439 LDFLAGS_vmlinux =
526 440
527 # Use USERINCLUDE when you must reference the 441 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 442 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 443 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 444 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 445 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 446 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li <<
534 -include $(srctree)/include/li 447 -include $(srctree)/include/linux/kconfig.h
535 448
536 # Use LINUXINCLUDE when you must reference the 449 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 450 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 451 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 452 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 453 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree 454 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542 -I$(objtree)/include \ 455 -I$(objtree)/include \
543 $(USERINCLUDE) 456 $(USERINCLUDE)
544 457
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 458 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 !! 459 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS := !! 460 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11 !! 461 -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar !! 462 -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char !! 463 -std=gnu89
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 464 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 := 465 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 466 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 467 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 468 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE <<
570 KBUILD_LDFLAGS_MODULE := 469 KBUILD_LDFLAGS_MODULE :=
>> 470 export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
571 KBUILD_LDFLAGS := 471 KBUILD_LDFLAGS :=
>> 472 GCC_PLUGINS_CFLAGS :=
572 CLANG_FLAGS := 473 CLANG_FLAGS :=
573 474
574 ifeq ($(KBUILD_CLIPPY),1) !! 475 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY !! 476 export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) !! 477 export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
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 <<
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ <<
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD <<
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS 478 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS <<
597 479
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 480 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 481 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 482 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 483 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 484 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 485 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
604 486
605 # Files to ignore in find ... statements 487 # Files to ignore in find ... statements
606 488
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 489 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 490 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 491 -prune -o
>> 492 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 493 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 494
611 # ============================================ 495 # ===========================================================================
612 # Rules shared between *config targets and bui 496 # Rules shared between *config targets and build targets
613 497
614 # Basic helpers built in scripts/basic/ 498 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic 499 PHONY += scripts_basic
616 scripts_basic: 500 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 501 $(Q)$(MAKE) $(build)=scripts/basic
>> 502 $(Q)rm -f .tmp_quiet_recordmcount
618 503
619 PHONY += outputmakefile 504 PHONY += outputmakefile
620 ifdef building_out_of_srctree <<
621 # Before starting out-of-tree build, make sure 505 # Before starting out-of-tree build, make sure the source tree is clean.
622 # outputmakefile generates a Makefile in the o 506 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 507 # separate output directory. This allows convenient use of make in the
624 # output directory. 508 # output directory.
625 # At the same time when output Makefile genera 509 # At the same time when output Makefile generated, generate .gitignore to
626 # ignore whole output directory 510 # 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: 511 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ !! 512 ifdef building_out_of_srctree
>> 513 $(Q)if [ -f $(srctree)/.config -o \
636 -d $(srctree)/include/config 514 -d $(srctree)/include/config -o \
637 -d $(srctree)/arch/$(SRCARCH) 515 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
638 echo >&2 "***"; \ 516 echo >&2 "***"; \
639 echo >&2 "*** The source tree 517 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 518 echo >&2 "*** in $(abs_srctree)";\
641 echo >&2 "***"; \ 519 echo >&2 "***"; \
642 false; \ 520 false; \
643 fi 521 fi
644 $(Q)ln -fsn $(srctree) source 522 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) !! 523 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
646 $(Q)test -e .gitignore || \ 524 $(Q)test -e .gitignore || \
647 { echo "# this is build directory, ign 525 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
648 endif 526 endif
649 527
>> 528 ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
>> 529 ifneq ($(CROSS_COMPILE),)
>> 530 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
>> 531 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
>> 532 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)
>> 533 GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
>> 534 endif
>> 535 ifneq ($(GCC_TOOLCHAIN),)
>> 536 CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
>> 537 endif
>> 538 ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
>> 539 CLANG_FLAGS += -no-integrated-as
>> 540 endif
>> 541 CLANG_FLAGS += -Werror=unknown-warning-option
>> 542 KBUILD_CFLAGS += $(CLANG_FLAGS)
>> 543 KBUILD_AFLAGS += $(CLANG_FLAGS)
>> 544 export CLANG_FLAGS
>> 545 endif
>> 546
650 # The expansion should be delayed until arch/$ 547 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a 548 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig ( 549 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det 550 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 551 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 <<
665 552
666 ifdef config-build 553 ifdef config-build
667 # ============================================ 554 # ===========================================================================
668 # *config targets only - make sure prerequisit 555 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 556 # in scripts/kconfig to make the *config target
670 557
671 # Read arch-specific Makefile to set KBUILD_DE !! 558 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 559 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 560 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile !! 561 include arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 562 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676 563
677 config: outputmakefile scripts_basic FORCE 564 config: outputmakefile scripts_basic FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 565 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 566
680 %config: outputmakefile scripts_basic FORCE 567 %config: outputmakefile scripts_basic FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 568 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 569
683 else #!config-build 570 else #!config-build
684 # ============================================ 571 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 572 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 573 # targets and others. In general all targets except *config targets.
687 574
688 # If building an external module we do not car 575 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules !! 576 # but instead _all depend on modules
690 PHONY += all 577 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),) 578 ifeq ($(KBUILD_EXTMOD),)
692 __all: all !! 579 _all: all
693 else 580 else
694 __all: modules !! 581 _all: modules
695 endif 582 endif
696 583
697 targets := <<
698 <<
699 # Decide whether to build built-in, modular, o 584 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in. 585 # Normally, just do built-in.
701 586
702 KBUILD_MODULES := 587 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1 588 KBUILD_BUILTIN := 1
704 589
705 # If we have only "make modules", don't compil 590 # If we have only "make modules", don't compile built-in objects.
>> 591 # When we're building modules with modversions, we need to consider
>> 592 # the built-in objects during the descend as well, in order to
>> 593 # make sure the checksums are up to date before we record them.
>> 594
706 ifeq ($(MAKECMDGOALS),modules) 595 ifeq ($(MAKECMDGOALS),modules)
707 KBUILD_BUILTIN := !! 596 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
708 endif 597 endif
709 598
710 # If we have "make <whatever> modules", compil 599 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway. 600 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module 601 # Just "make" or "make all" shall build modules as well
713 602
714 ifneq ($(filter all modules nsdeps %compile_co !! 603 ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 604 KBUILD_MODULES := 1
716 endif 605 endif
717 606
718 ifeq ($(MAKECMDGOALS),) 607 ifeq ($(MAKECMDGOALS),)
719 KBUILD_MODULES := 1 608 KBUILD_MODULES := 1
720 endif 609 endif
721 610
722 export KBUILD_MODULES KBUILD_BUILTIN 611 export KBUILD_MODULES KBUILD_BUILTIN
723 612
724 ifdef need-config 613 ifdef need-config
725 include include/config/auto.conf 614 include include/config/auto.conf
726 endif 615 endif
727 616
728 ifeq ($(KBUILD_EXTMOD),) 617 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs 618 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y := !! 619 init-y := init/
731 drivers-y := !! 620 drivers-y := drivers/ sound/
>> 621 drivers-$(CONFIG_SAMPLES) += samples/
>> 622 net-y := net/
732 libs-y := lib/ 623 libs-y := lib/
>> 624 core-y := usr/
>> 625 virt-y := virt/
733 endif # KBUILD_EXTMOD 626 endif # KBUILD_EXTMOD
734 627
735 # The all: target is the default when no targe 628 # The all: target is the default when no target is given on the
736 # command line. 629 # command line.
737 # This allow a user to issue only 'make' to bu 630 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 631 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 632 all: vmlinux
740 633
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover !! 634 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
742 ifdef CONFIG_CC_IS_GCC !! 635 $(call cc-option,-fno-tree-loop-im) \
743 CFLAGS_GCOV += -fno-tree-loop-im !! 636 $(call cc-disable-warning,maybe-uninitialized,)
744 endif <<
745 export CFLAGS_GCOV 637 export CFLAGS_GCOV
746 638
747 # The arch Makefiles can override CC_FLAGS_FTR 639 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER 640 ifdef CONFIG_FUNCTION_TRACER
749 CC_FLAGS_FTRACE := -pg 641 CC_FLAGS_FTRACE := -pg
750 endif 642 endif
751 643
752 include $(srctree)/arch/$(SRCARCH)/Makefile !! 644 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
>> 645 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
>> 646 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
>> 647 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
>> 648 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
>> 649 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
>> 650 export RETPOLINE_CFLAGS
>> 651 export RETPOLINE_VDSO_CFLAGS
>> 652
>> 653 include arch/$(SRCARCH)/Makefile
753 654
754 ifdef need-config 655 ifdef need-config
755 ifdef may-sync-config 656 ifdef may-sync-config
756 # Read in dependencies to all Kconfig* files, 657 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include 658 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP 659 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd 660 include include/config/auto.conf.cmd
760 661
761 $(KCONFIG_CONFIG): 662 $(KCONFIG_CONFIG):
762 @echo >&2 '***' 663 @echo >&2 '***'
763 @echo >&2 '*** Configuration file "$@" 664 @echo >&2 '*** Configuration file "$@" not found!'
764 @echo >&2 '***' 665 @echo >&2 '***'
765 @echo >&2 '*** Please run some configu 666 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
766 @echo >&2 '*** "make menuconfig" or "m 667 @echo >&2 '*** "make menuconfig" or "make xconfig").'
767 @echo >&2 '***' 668 @echo >&2 '***'
768 @/bin/false 669 @/bin/false
769 670
770 # The actual configuration files used during t 671 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda 672 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con 673 # include/config/auto.conf (which mirrors .config).
773 # 674 #
774 # This exploits the 'multi-target pattern rule 675 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once 676 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b !! 677 %/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG)
777 # <<
778 # Do not use $(call cmd,...) here. That would <<
779 # so you cannot notice that Kconfig is waiting <<
780 %/config/auto.conf %/config/auto.conf.cmd %/ge <<
781 $(Q)$(kecho) " SYNC $@" <<
782 $(Q)$(MAKE) -f $(srctree)/Makefile syn 678 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config 679 else # !may-sync-config
784 # External modules and some install targets ne 680 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care 681 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test 682 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf 683 PHONY += include/config/auto.conf
788 684
789 include/config/auto.conf: 685 include/config/auto.conf:
790 @test -e include/generated/autoconf.h !! 686 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
791 echo >&2; 687 echo >&2; \
792 echo >&2 " ERROR: Kernel configuratio 688 echo >&2 " ERROR: Kernel configuration is invalid."; \
793 echo >&2 " include/generated/a 689 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
794 echo >&2 " Run 'make oldconfig 690 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
795 echo >&2 ; 691 echo >&2 ; \
796 /bin/false) 692 /bin/false)
797 693
798 endif # may-sync-config 694 endif # may-sync-config
799 endif # need-config 695 endif # need-config
800 696
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch !! 697 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
>> 698 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 699 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 700 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 701 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
802 702
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE 703 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
804 KBUILD_CFLAGS += -O2 704 KBUILD_CFLAGS += -O2
805 KBUILD_RUSTFLAGS += -Copt-level=2 !! 705 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
>> 706 KBUILD_CFLAGS += -O3
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 707 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
807 KBUILD_CFLAGS += -Os 708 KBUILD_CFLAGS += -Os
808 KBUILD_RUSTFLAGS += -Copt-level=s <<
809 endif 709 endif
810 710
811 # Always set `debug-assertions` and `overflow- <<
812 # depends on `opt-level` and `debug-assertions <<
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( <<
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C <<
815 <<
816 # Tell gcc to never replace conditional load w 711 # 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 712 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 713 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
822 endif !! 714
>> 715 include scripts/Makefile.kcov
>> 716 include scripts/Makefile.gcc-plugins
823 717
824 ifdef CONFIG_READABLE_ASM 718 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 719 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 720 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 721 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 722 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 723 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
>> 724 $(call cc-option,-fno-ipa-cp-clone,) \
>> 725 $(call cc-option,-fno-partial-inlining)
>> 726 endif
>> 727
>> 728 ifneq ($(CONFIG_FRAME_WARN),0)
>> 729 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
830 endif 730 endif
831 731
832 stackp-flags-y !! 732 stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR) 733 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 734 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
835 735
836 KBUILD_CFLAGS += $(stackp-flags-y) 736 KBUILD_CFLAGS += $(stackp-flags-y)
837 737
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 738 ifdef CONFIG_CC_IS_CLANG
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 739 KBUILD_CPPFLAGS += -Qunused-arguments
>> 740 KBUILD_CFLAGS += -Wno-format-invalid-specifier
>> 741 KBUILD_CFLAGS += -Wno-gnu
>> 742 # Quiet clang warning: comparison of unsigned expression < 0 is always false
>> 743 KBUILD_CFLAGS += -Wno-tautological-compare
>> 744 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
>> 745 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>> 746 # See modpost pattern 2
>> 747 KBUILD_CFLAGS += -mno-global-merge
>> 748 else
>> 749
>> 750 # These warnings generated too much noise in a regular build.
>> 751 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 752 KBUILD_CFLAGS += -Wno-unused-but-set-variable
>> 753
>> 754 # Warn about unmarked fall-throughs in switch statement.
>> 755 # Disabled for clang while comment to attribute conversion happens and
>> 756 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
>> 757 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
>> 758 endif
840 759
>> 760 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
841 ifdef CONFIG_FRAME_POINTER 761 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 762 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 763 else
845 # Some targets (ARM with Thumb2, for example), 764 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 765 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 766 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 767 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 768 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER 769 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 770 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 771 endif
855 endif 772 endif
856 773
857 # Initialize all stack variables with a 0xAA p !! 774 # Initialize all stack variables with a pattern, if desired.
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN !! 775 ifdef CONFIG_INIT_STACK_ALL
859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat 776 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
860 endif 777 endif
861 778
862 # Initialize all stack variables with a zero v !! 779 DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments)
863 ifdef CONFIG_INIT_STACK_ALL_ZERO !! 780
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer !! 781 ifdef CONFIG_DEBUG_INFO
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 782 ifdef CONFIG_DEBUG_INFO_SPLIT
866 # https://github.com/llvm/llvm-project/issues/ !! 783 DEBUG_CFLAGS += -gsplit-dwarf
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 784 else
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER !! 785 DEBUG_CFLAGS += -g
869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA !! 786 endif
>> 787 KBUILD_AFLAGS += -Wa,-gdwarf-2
870 endif 788 endif
>> 789 ifdef CONFIG_DEBUG_INFO_DWARF4
>> 790 DEBUG_CFLAGS += -gdwarf-4
871 endif 791 endif
872 792
873 # While VLAs have been removed, GCC produces u !! 793 ifdef CONFIG_DEBUG_INFO_REDUCED
874 # for the randomize_kstack_offset feature. Dis !! 794 DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac !! 795 $(call cc-option,-fno-var-tracking)
876 <<
877 # Clear used registers at func exit (to reduce <<
878 ifdef CONFIG_ZERO_CALL_USED_REGS <<
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- <<
880 endif 796 endif
881 797
>> 798 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
>> 799 export DEBUG_CFLAGS
>> 800
882 ifdef CONFIG_FUNCTION_TRACER 801 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC !! 802 ifdef CONFIG_FTRACE_MCOUNT_RECORD
884 CC_FLAGS_FTRACE += -mrecord-mcount !! 803 # gcc 5 supports generating the mcount tables directly
>> 804 ifeq ($(call cc-option-yn,-mrecord-mcount),y)
>> 805 CC_FLAGS_FTRACE += -mrecord-mcount
>> 806 export CC_USING_RECORD_MCOUNT := 1
>> 807 endif
885 ifdef CONFIG_HAVE_NOP_MCOUNT 808 ifdef CONFIG_HAVE_NOP_MCOUNT
886 ifeq ($(call cc-option-yn, -mnop-mcount),y 809 ifeq ($(call cc-option-yn, -mnop-mcount),y)
887 CC_FLAGS_FTRACE += -mnop-mcount 810 CC_FLAGS_FTRACE += -mnop-mcount
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 811 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
889 endif 812 endif
890 endif 813 endif
891 endif 814 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 815 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr <<
905 ifeq ($(call cc-option-yn, -mfentry),y) 816 ifeq ($(call cc-option-yn, -mfentry),y)
906 CC_FLAGS_FTRACE += -mfentry 817 CC_FLAGS_FTRACE += -mfentry
907 CC_FLAGS_USING += -DCC_USING_FENTRY 818 CC_FLAGS_USING += -DCC_USING_FENTRY
908 endif 819 endif
909 endif 820 endif
910 export CC_FLAGS_FTRACE 821 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 822 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 823 KBUILD_AFLAGS += $(CC_FLAGS_USING)
>> 824 ifdef CONFIG_DYNAMIC_FTRACE
>> 825 ifdef CONFIG_HAVE_C_RECORDMCOUNT
>> 826 BUILD_C_RECORDMCOUNT := y
>> 827 export BUILD_C_RECORDMCOUNT
>> 828 endif
>> 829 endif
913 endif 830 endif
914 831
915 # We trigger additional mismatches with less i 832 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 833 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 834 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif 835 endif
919 836
920 # `rustc`'s `-Zfunction-sections` applies to d <<
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 837 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 838 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections 839 LDFLAGS_vmlinux += --gc-sections
925 endif 840 endif
926 841
927 ifdef CONFIG_SHADOW_CALL_STACK !! 842 ifdef CONFIG_LIVEPATCH
928 ifndef CONFIG_DYNAMIC_SCS !! 843 KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac <<
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) <<
931 endif <<
932 export CC_FLAGS_SCS <<
933 endif 844 endif
934 845
935 ifdef CONFIG_LTO_CLANG !! 846 # arch Makefile may override CC so keep this after arch Makefile is included
936 ifdef CONFIG_LTO_CLANG_THIN !! 847 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit <<
938 else <<
939 CC_FLAGS_LTO := -flto <<
940 endif <<
941 CC_FLAGS_LTO += -fvisibility=hidden <<
942 848
943 # Limit inlining across translation units to r !! 849 # warn about C99 declaration after statement
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 !! 850 KBUILD_CFLAGS += -Wdeclaration-after-statement
945 endif <<
946 851
947 ifdef CONFIG_LTO !! 852 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) !! 853 KBUILD_CFLAGS += -Wvla
949 KBUILD_AFLAGS += -fno-lto <<
950 export CC_FLAGS_LTO <<
951 endif <<
952 854
953 ifdef CONFIG_CFI_CLANG !! 855 # disable pointer signed / unsigned warnings in gcc 4.0
954 CC_FLAGS_CFI := -fsanitize=kcfi !! 856 KBUILD_CFLAGS += -Wno-pointer-sign
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) <<
956 export CC_FLAGS_CFI <<
957 endif <<
958 857
959 # Architectures can define flags to add/remove !! 858 # disable stringop warnings in gcc 8+
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 859 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 860
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) !! 861 # We'll want to enable this eventually, but it's not going away for 5.7 at least
965 # Set the minimal function alignment. Use the !! 862 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
966 # -fmin-function-alignment if it is available, !! 863 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME !! 864 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
970 else <<
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
972 endif <<
973 endif <<
974 865
975 # arch Makefile may override CC so keep this a !! 866 # Another good warning that we'll want to enable eventually
976 NOSTDINC_FLAGS += -nostdinc !! 867 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
977 868
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 869 # Enabled with W=2, disabled by default as noisy
979 # the kernel uses only C99 flexible arrays for !! 870 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) + <<
987 871
988 # disable invalid "can't wrap" optimizations f 872 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow !! 873 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
>> 874
>> 875 # clang sets -fmerge-all-constants by default as optimization, but this
>> 876 # is non-conforming behavior for C and in fact breaks the kernel, so we
>> 877 # need to disable it here generally.
>> 878 KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
>> 879
>> 880 # for gcc -fno-merge-all-constants disables everything, but it is fine
>> 881 # to have actual conforming behavior enabled.
>> 882 KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
990 883
991 # Make sure -fstack-check isn't enabled (like 884 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check !! 885 KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
993 886
994 # conserve stack if available 887 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC !! 888 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
996 KBUILD_CFLAGS += -fconserve-stack !! 889
997 endif !! 890 # Prohibit date/time macros, which would make the build non-deterministic
>> 891 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
>> 892
>> 893 # enforce correct pointer usage
>> 894 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>> 895
>> 896 # Require designated initializers for all marked structures
>> 897 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
998 898
999 # change __FILE__ to the relative path from th 899 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 900 KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001 901
1002 # include additional Makefiles when needed !! 902 # ensure -fcf-protection is disabled when using retpoline as it is
1003 include-y := scripts/Ma !! 903 # incompatible with -mindirect-branch=thunk-extern
1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma !! 904 ifdef CONFIG_RETPOLINE
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma !! 905 KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
1006 include-$(CONFIG_KASAN) += scripts/Ma !! 906 endif
1007 include-$(CONFIG_KCSAN) += scripts/Ma <<
1008 include-$(CONFIG_KMSAN) += scripts/Ma <<
1009 include-$(CONFIG_UBSAN) += scripts/Ma <<
1010 include-$(CONFIG_KCOV) += scripts/Ma <<
1011 include-$(CONFIG_RANDSTRUCT) += scripts/Ma <<
1012 include-$(CONFIG_GCC_PLUGINS) += scripts/Ma <<
1013 <<
1014 include $(addprefix $(srctree)/, $(include-y) <<
1015 <<
1016 # scripts/Makefile.gcc-plugins is intentional <<
1017 # Do not add $(call cc-option,...) below this <<
1018 # from the clean source tree, the GCC plugins <<
1019 907
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS !! 908 include scripts/Makefile.kasan
>> 909 include scripts/Makefile.extrawarn
>> 910 include scripts/Makefile.ubsan
>> 911
>> 912 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) 913 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1022 KBUILD_AFLAGS += $(KAFLAGS) 914 KBUILD_AFLAGS += $(KAFLAGS)
1023 KBUILD_CFLAGS += $(KCFLAGS) 915 KBUILD_CFLAGS += $(KCFLAGS)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) <<
1025 <<
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 <<
1027 LDFLAGS_vmlinux += --build-id=sha1 <<
1028 916
1029 KBUILD_LDFLAGS += -z noexecstack !! 917 KBUILD_LDFLAGS_MODULE += --build-id
1030 ifeq ($(CONFIG_LD_IS_BFD),y) !! 918 LDFLAGS_vmlinux += --build-id
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn <<
1032 endif <<
1033 919
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 920 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X !! 921 LDFLAGS_vmlinux += $(call ld-option, -X,)
1036 endif 922 endif
1037 923
1038 ifeq ($(CONFIG_RELR),y) 924 ifeq ($(CONFIG_RELR),y)
1039 # ld.lld before 15 did not support -z pack-re !! 925 LDFLAGS_vmlinux += --pack-dyn-relocs=relr
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1041 endif <<
1042 <<
1043 # We never want expected sections to be place <<
1044 # linker. All sections should be explicitly n <<
1045 ifdef CONFIG_LD_ORPHAN_WARN <<
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG <<
1047 endif 926 endif
1048 927
1049 # Align the bit size of userspace programs wi <<
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta <<
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta <<
1052 <<
1053 # make the checker run with the right archite 928 # make the checker run with the right architecture
1054 CHECKFLAGS += --arch=$(ARCH) 929 CHECKFLAGS += --arch=$(ARCH)
1055 930
1056 # insure the checker run with the right endia 931 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 932 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058 933
1059 # the checker needs the correct machine size 934 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 935 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061 936
1062 # Default kernel image to build when no speci 937 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 938 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 939 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 940 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 941 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 942 export KBUILD_IMAGE ?= vmlinux
1068 943
1069 # 944 #
1070 # INSTALL_PATH specifies where to place the u 945 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 946 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 947 export INSTALL_PATH ?= /boot
1073 948
1074 # 949 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 950 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 951 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 952 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 953 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 954 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 955
1081 # 956 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 957 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 958 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 959 # makefile but the argument can be passed to make if needed.
1085 # 960 #
1086 961
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 962 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 963 export MODLIB
1089 964
1090 PHONY += prepare0 !! 965 #
>> 966 # INSTALL_MOD_STRIP, if defined, will cause modules to be
>> 967 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
>> 968 # the default option --strip-debug will be used. Otherwise,
>> 969 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
>> 970
>> 971 ifdef INSTALL_MOD_STRIP
>> 972 ifeq ($(INSTALL_MOD_STRIP),1)
>> 973 mod_strip_cmd = $(STRIP) --strip-debug
>> 974 else
>> 975 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
>> 976 endif # INSTALL_MOD_STRIP=1
>> 977 else
>> 978 mod_strip_cmd = true
>> 979 endif # INSTALL_MOD_STRIP
>> 980 export mod_strip_cmd
>> 981
>> 982 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
>> 983 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
>> 984 # or CONFIG_MODULE_COMPRESS_XZ.
>> 985
>> 986 mod_compress_cmd = true
>> 987 ifdef CONFIG_MODULE_COMPRESS
>> 988 ifdef CONFIG_MODULE_COMPRESS_GZIP
>> 989 mod_compress_cmd = gzip -n -f
>> 990 endif # CONFIG_MODULE_COMPRESS_GZIP
>> 991 ifdef CONFIG_MODULE_COMPRESS_XZ
>> 992 mod_compress_cmd = xz -f
>> 993 endif # CONFIG_MODULE_COMPRESS_XZ
>> 994 endif # CONFIG_MODULE_COMPRESS
>> 995 export mod_compress_cmd
1091 996
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 997 ifdef CONFIG_MODULE_SIG_ALL
1093 export MODORDER := $(extmod_prefix)modules.or !! 998 $(eval $(call config_filename,MODULE_SIG_KEY))
1094 export MODULES_NSDEPS := $(extmod_prefix)modu <<
1095 999
1096 ifeq ($(KBUILD_EXTMOD),) !! 1000 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
>> 1001 else
>> 1002 mod_sign_cmd = true
>> 1003 endif
>> 1004 export mod_sign_cmd
1097 1005
1098 build-dir := . !! 1006 HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1099 clean-dirs := $(sort . Documentation \ <<
1100 $(patsubst %/,%,$(filter <<
1101 $(drivers-) $(libs-)) <<
1102 <<
1103 export ARCH_CORE := $(core-y) <<
1104 export ARCH_LIB := $(filter %/, $(lib <<
1105 export ARCH_DRIVERS := $(drivers-y) $(dri <<
1106 # Externally visible symbols (used by link-vm <<
1107 1007
1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 1008 ifdef CONFIG_STACK_VALIDATION
1109 ifdef CONFIG_MODULES !! 1009 has_libelf := $(call try-run,\
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a !! 1010 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib !! 1011 ifeq ($(has_libelf),1)
1112 else !! 1012 objtool_target := tools/objtool FORCE
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 1013 else
>> 1014 SKIP_STACK_VALIDATION := 1
>> 1015 export SKIP_STACK_VALIDATION
>> 1016 endif
1114 endif 1017 endif
1115 1018
1116 export KBUILD_VMLINUX_LIBS !! 1019 PHONY += prepare0
>> 1020
>> 1021 export MODORDER := $(extmod-prefix)modules.order
>> 1022 export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
>> 1023
>> 1024 ifeq ($(KBUILD_EXTMOD),)
>> 1025 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
>> 1026
>> 1027 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
>> 1028 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 1029 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
>> 1030
>> 1031 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
>> 1032 $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
>> 1033 $(drivers-) $(net-) $(libs-) $(virt-))))
>> 1034
>> 1035 build-dirs := $(vmlinux-dirs)
>> 1036 clean-dirs := $(vmlinux-alldirs)
>> 1037
>> 1038 init-y := $(patsubst %/, %/built-in.a, $(init-y))
>> 1039 core-y := $(patsubst %/, %/built-in.a, $(core-y))
>> 1040 drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
>> 1041 net-y := $(patsubst %/, %/built-in.a, $(net-y))
>> 1042 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
>> 1043 libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
>> 1044 virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
>> 1045
>> 1046 # Externally visible symbols (used by link-vmlinux.sh)
>> 1047 export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
>> 1048 $(drivers-y) $(net-y) $(virt-y)
>> 1049 export KBUILD_VMLINUX_LIBS := $(libs-y1)
1117 export KBUILD_LDS := arch/$(SRCARCH) 1050 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 1051 export LDFLAGS_vmlinux
>> 1052 # used by scripts/Makefile.package
>> 1053 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
>> 1054
>> 1055 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1118 1056
>> 1057 # Recurse until adjust_autoksyms.sh is satisfied
>> 1058 PHONY += autoksyms_recursive
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1059 ifdef CONFIG_TRIM_UNUSED_KSYMS
>> 1060 autoksyms_recursive: descend modules.order
>> 1061 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
>> 1062 "$(MAKE) -f $(srctree)/Makefile vmlinux"
>> 1063 endif
>> 1064
1120 # For the kernel to actually contain only the 1065 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi 1066 # we have to build modules as well to determine what those symbols are.
1122 KBUILD_MODULES := 1 !! 1067 # (this can be evaluated only once include/config/auto.conf has been included)
>> 1068 ifdef CONFIG_TRIM_UNUSED_KSYMS
>> 1069 KBUILD_MODULES := 1
1123 endif 1070 endif
1124 1071
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1072 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 1073
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1074 $(autoksyms_h):
1141 @: !! 1075 $(Q)mkdir -p $(dir $@)
>> 1076 $(Q)touch $@
>> 1077
>> 1078 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1142 1079
1143 PHONY += vmlinux !! 1080 # Final link of vmlinux with optional arch pass after final link
1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1081 cmd_link-vmlinux = \
1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1082 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \
1146 # unrelated; the decompressors just happen to !! 1083 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1147 # arch/*/boot/compressed/vmlinux. !! 1084
1148 # Export LDFLAGS_vmlinux only to scripts/Make !! 1085 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1149 # !! 1086 +$(call if_changed,link-vmlinux)
1150 # _LDFLAGS_vmlinux is a workaround for the 'p !! 1087
1151 # https://savannah.gnu.org/bugs/?61463 !! 1088 targets := vmlinux
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 1089
1159 # The actual objects are generated when desce 1090 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1091 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1092 $(sort $(vmlinux-deps)): descend ;
1162 1093
1163 ifeq ($(origin KERNELRELEASE),file) !! 1094 filechk_kernel.release = \
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1095 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1165 else <<
1166 filechk_kernel.release = echo $(KERNELRELEASE <<
1167 endif <<
1168 1096
1169 # Store (new) KERNELRELEASE string in include 1097 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE 1098 include/config/kernel.release: FORCE
1171 $(call filechk,kernel.release) 1099 $(call filechk,kernel.release)
1172 1100
1173 # Additional helpers built in scripts/ 1101 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr 1102 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel 1103 # in parallel
1176 PHONY += scripts 1104 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc 1105 scripts: scripts_basic scripts_dtc
1178 $(Q)$(MAKE) $(build)=$(@) 1106 $(Q)$(MAKE) $(build)=$(@)
1179 1107
1180 # Things we need to do before we recursively 1108 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1109 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1110 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1111 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1112 # version.h and scripts_basic is processed / created.
1185 1113
1186 PHONY += prepare archprepare 1114 PHONY += prepare archprepare
1187 1115
1188 archprepare: outputmakefile archheaders archs 1116 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1189 asm-generic $(version_h) include/gene !! 1117 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
1190 include/generated/compile.h include/g <<
1191 1118
1192 prepare0: archprepare 1119 prepare0: archprepare
1193 $(Q)$(MAKE) $(build)=scripts/mod 1120 $(Q)$(MAKE) $(build)=scripts/mod
1194 $(Q)$(MAKE) $(build)=. prepare !! 1121 $(Q)$(MAKE) $(build)=.
1195 1122
1196 # All the preparing.. 1123 # All the preparing..
1197 prepare: prepare0 !! 1124 prepare: prepare0 prepare-objtool
1198 ifdef CONFIG_RUST <<
1199 +$(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 1125
1207 # Support for using generic headers in asm-ge 1126 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1127 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209 1128
1210 PHONY += asm-generic uapi-asm-generic 1129 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic 1130 asm-generic: uapi-asm-generic
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1131 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1213 generic=include/asm-generic 1132 generic=include/asm-generic
1214 uapi-asm-generic: 1133 uapi-asm-generic:
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC 1134 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1216 generic=include/uapi/asm-generic 1135 generic=include/uapi/asm-generic
1217 1136
>> 1137 PHONY += prepare-objtool
>> 1138 prepare-objtool: $(objtool_target)
>> 1139 ifeq ($(SKIP_STACK_VALIDATION),1)
>> 1140 ifdef CONFIG_UNWINDER_ORC
>> 1141 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1142 @false
>> 1143 else
>> 1144 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1145 endif
>> 1146 endif
>> 1147
1218 # Generate some files 1148 # Generate some files
1219 # ------------------------------------------- 1149 # ---------------------------------------------------------------------------
1220 1150
1221 # KERNELRELEASE can change from a few differe 1151 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1152 # needs to be updated, so this check is forced on all builds
1223 1153
1224 uts_len := 64 1154 uts_len := 64
1225 define filechk_utsrelease.h 1155 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1156 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1157 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1158 exit 1; \
1229 fi; 1159 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR 1160 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef 1161 endef
1232 1162
1233 define filechk_version.h 1163 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then !! 1164 echo \#define LINUX_VERSION_CODE $(shell \
1235 echo \#define LINUX_VERSION_C !! 1165 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1236 expr $(VERSION) \* 65536 + $( !! 1166 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1237 else <<
1238 echo \#define LINUX_VERSION_C <<
1239 expr $(VERSION) \* 65536 + $( <<
1240 fi; <<
1241 echo '#define KERNEL_VERSION(a,b,c) ( <<
1242 ((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 1167 endef
1247 1168
1248 $(version_h): private PATCHLEVEL := $(or $(PA <<
1249 $(version_h): private SUBLEVEL := $(or $(SUBL <<
1250 $(version_h): FORCE 1169 $(version_h): FORCE
1251 $(call filechk,version.h) 1170 $(call filechk,version.h)
>> 1171 $(Q)rm -f $(old_version_h)
1252 1172
1253 include/generated/utsrelease.h: include/confi 1173 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1174 $(call filechk,utsrelease.h)
1255 1175
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 1176 PHONY += headerdep
1263 headerdep: 1177 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1178 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1179 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1180
1267 # ------------------------------------------- 1181 # ---------------------------------------------------------------------------
1268 # Kernel headers 1182 # Kernel headers
1269 1183
1270 #Default location for installed headers 1184 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1185 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1186
1273 quiet_cmd_headers_install = INSTALL $(INSTALL 1187 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1274 cmd_headers_install = \ 1188 cmd_headers_install = \
1275 mkdir -p $(INSTALL_HDR_PATH); \ 1189 mkdir -p $(INSTALL_HDR_PATH); \
1276 rsync -mrl --include='*/' --include=' 1190 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1277 usr/include $(INSTALL_HDR_PATH) 1191 usr/include $(INSTALL_HDR_PATH)
1278 1192
1279 PHONY += headers_install 1193 PHONY += headers_install
1280 headers_install: headers 1194 headers_install: headers
1281 $(call cmd,headers_install) 1195 $(call cmd,headers_install)
1282 1196
1283 PHONY += archheaders archscripts 1197 PHONY += archheaders archscripts
1284 1198
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he 1199 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1286 1200
1287 PHONY += headers 1201 PHONY += headers
1288 headers: $(version_h) scripts_unifdef uapi-as 1202 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1289 $(if $(filter um, $(SRCARCH)), $(erro !! 1203 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
>> 1204 $(error Headers not exportable for the $(SRCARCH) architecture))
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1205 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC 1206 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1292 1207
>> 1208 # Deprecated. It is no-op now.
>> 1209 PHONY += headers_check
>> 1210 headers_check:
>> 1211 @:
>> 1212
1293 ifdef CONFIG_HEADERS_INSTALL 1213 ifdef CONFIG_HEADERS_INSTALL
1294 prepare: headers 1214 prepare: headers
1295 endif 1215 endif
1296 1216
1297 PHONY += scripts_unifdef 1217 PHONY += scripts_unifdef
1298 scripts_unifdef: scripts_basic 1218 scripts_unifdef: scripts_basic
1299 $(Q)$(MAKE) $(build)=scripts scripts/ 1219 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1300 1220
1301 # ------------------------------------------- 1221 # ---------------------------------------------------------------------------
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 1222 # Kernel selftest
1365 1223
1366 PHONY += kselftest 1224 PHONY += kselftest
1367 kselftest: headers !! 1225 kselftest:
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1226 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369 1227
1370 kselftest-%: headers FORCE !! 1228 kselftest-%: FORCE
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi 1229 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1372 1230
1373 PHONY += kselftest-merge 1231 PHONY += kselftest-merge
1374 kselftest-merge: 1232 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1233 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1234 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1377 xargs $(srctree)/scripts/kcon !! 1235 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol 1236 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379 1237
1380 # ------------------------------------------- 1238 # ---------------------------------------------------------------------------
1381 # Devicetree files 1239 # Devicetree files
1382 1240
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1241 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts 1242 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif 1243 endif
1386 1244
1387 ifneq ($(dtstree),) 1245 ifneq ($(dtstree),)
1388 1246
1389 %.dtb: dtbs_prepare !! 1247 %.dtb: include/config/kernel.release scripts_dtc
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts <<
1391 <<
1392 %.dtbo: dtbs_prepare <<
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1248 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394 1249
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1250 PHONY += dtbs dtbs_install dtbs_check
1396 dtbs: dtbs_prepare !! 1251 dtbs: include/config/kernel.release scripts_dtc
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1252 $(Q)$(MAKE) $(build)=$(dtstree)
1398 <<
1399 # include/config/kernel.release is actually n <<
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) <<
1401 # dtbs_install depend on it as dtbs_install m <<
1402 dtbs_prepare: include/config/kernel.release s <<
1403 1253
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), 1254 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1405 export CHECK_DTBS=y !! 1255 dtbs: dt_binding_check
1406 endif <<
1407 <<
1408 ifneq ($(CHECK_DTBS),) <<
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif 1256 endif
1411 1257
>> 1258 dtbs_check: export CHECK_DTBS=1
1412 dtbs_check: dtbs 1259 dtbs_check: dtbs
1413 1260
1414 dtbs_install: 1261 dtbs_install:
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1262 $(Q)$(MAKE) $(dtbinst)=$(dtstree)
1416 1263
1417 ifdef CONFIG_OF_EARLY_FLATTREE 1264 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs 1265 all: dtbs
1419 endif 1266 endif
1420 1267
1421 endif 1268 endif
1422 1269
1423 PHONY += scripts_dtc 1270 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic 1271 scripts_dtc: scripts_basic
1425 $(Q)$(MAKE) $(build)=scripts/dtc 1272 $(Q)$(MAKE) $(build)=scripts/dtc
1426 1273
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1274 PHONY += dt_binding_check
1428 export CHECK_DTBS=y !! 1275 dt_binding_check: scripts_dtc
1429 endif <<
1430 <<
1431 PHONY += dt_binding_check dt_binding_schemas <<
1432 dt_binding_check: dt_binding_schemas scripts_ <<
1433 $(Q)$(MAKE) $(build)=Documentation/de <<
1434 <<
1435 dt_binding_schemas: <<
1436 $(Q)$(MAKE) $(build)=Documentation/de 1276 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437 1277
1438 PHONY += dt_compatible_check <<
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 <<
1442 # ------------------------------------------- 1278 # ---------------------------------------------------------------------------
1443 # Modules 1279 # Modules
1444 1280
1445 ifdef CONFIG_MODULES 1281 ifdef CONFIG_MODULES
1446 1282
1447 # By default, build modules as well 1283 # By default, build modules as well
1448 1284
1449 all: modules 1285 all: modules
1450 1286
1451 # When we're building modules with modversion <<
1452 # the built-in objects during the descend as <<
1453 # make sure the checksums are up to date befo <<
1454 ifdef CONFIG_MODVERSIONS <<
1455 KBUILD_BUILTIN := 1 <<
1456 endif <<
1457 <<
1458 # Build modules 1287 # Build modules
1459 # 1288 #
>> 1289 # A module can be listed more than once in obj-m resulting in
>> 1290 # duplicate lines in modules.order files. Those are removed
>> 1291 # using awk while concatenating to the final file.
1460 1292
1461 # *.ko are usually independent of vmlinux, bu !! 1293 PHONY += modules
1462 # is an exception. !! 1294 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES !! 1295 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1464 KBUILD_BUILTIN := 1 !! 1296 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
1465 modules: vmlinux <<
1466 endif <<
1467 1297
1468 modules: modules_prepare !! 1298 modules.order: descend
>> 1299 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
1469 1300
1470 # Target to prepare building external modules 1301 # Target to prepare building external modules
>> 1302 PHONY += modules_prepare
1471 modules_prepare: prepare 1303 modules_prepare: prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ !! 1304
>> 1305 # Target to install modules
>> 1306 PHONY += modules_install
>> 1307 modules_install: _modinst_ _modinst_post
>> 1308
>> 1309 PHONY += _modinst_
>> 1310 _modinst_:
>> 1311 @rm -rf $(MODLIB)/kernel
>> 1312 @rm -f $(MODLIB)/source
>> 1313 @mkdir -p $(MODLIB)/kernel
>> 1314 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1315 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1316 rm -f $(MODLIB)/build ; \
>> 1317 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1318 fi
>> 1319 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
>> 1320 @cp -f modules.builtin $(MODLIB)/
>> 1321 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
>> 1322 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1323
>> 1324 # This depmod is only for convenience to give the initial
>> 1325 # boot a modules.dep even before / is mounted read-write. However the
>> 1326 # boot script depmod is the master version.
>> 1327 PHONY += _modinst_post
>> 1328 _modinst_post: _modinst_
>> 1329 $(call cmd,depmod)
>> 1330
>> 1331 ifeq ($(CONFIG_MODULE_SIG), y)
>> 1332 PHONY += modules_sign
>> 1333 modules_sign:
>> 1334 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
>> 1335 endif
>> 1336
>> 1337 else # CONFIG_MODULES
>> 1338
>> 1339 # Modules not configured
>> 1340 # ---------------------------------------------------------------------------
>> 1341
>> 1342 PHONY += modules modules_install
>> 1343 modules modules_install:
>> 1344 @echo >&2
>> 1345 @echo >&2 "The present kernel configuration has modules disabled."
>> 1346 @echo >&2 "Type 'make config' and enable loadable module support."
>> 1347 @echo >&2 "Then build a kernel with module support enabled."
>> 1348 @echo >&2
>> 1349 @exit 1
1473 1350
1474 endif # CONFIG_MODULES 1351 endif # CONFIG_MODULES
1475 1352
1476 ### 1353 ###
1477 # Cleaning is done on three levels. 1354 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1355 # make clean Delete most generated files
1479 # Leave enough to build extern 1356 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1357 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1358 # make distclean Remove editor backup files, patch leftover files and the like
1482 1359
1483 # Directories & files removed with 'make clea 1360 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1361 CLEAN_DIRS += include/ksym
1485 modules.builtin modules.builti !! 1362 CLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps
1486 compile_commands.json rust/tes <<
1487 rust-project.json .vmlinux.obj <<
1488 1363
1489 # Directories & files removed with 'make mrpr 1364 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene !! 1365 MRPROPER_DIRS += include/config include/generated \
1491 arch/$(SRCARCH)/include/gen !! 1366 arch/$(SRCARCH)/include/generated .tmp_objdiff \
1492 debian snap tar-install PKG !! 1367 debian/ snap/ tar-install/
1493 .config .config.old .versio !! 1368 MRPROPER_FILES += .config .config.old .version \
1494 Module.symvers \ 1369 Module.symvers \
1495 certs/signing_key.pem \ !! 1370 signing_key.pem signing_key.priv signing_key.x509 \
1496 certs/x509.genkey \ !! 1371 x509.genkey extra_certificates signing_key.x509.keyid \
1497 vmlinux-gdb.py \ !! 1372 signing_key.x509.signer vmlinux-gdb.py \
1498 rpmbuild \ !! 1373 *.spec
1499 rust/libmacros.so !! 1374
>> 1375 # Directories & files removed with 'make distclean'
>> 1376 DISTCLEAN_DIRS +=
>> 1377 DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1500 1378
1501 # clean - Delete most, but leave enough to bu 1379 # clean - Delete most, but leave enough to build external modules
1502 # 1380 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1381 clean: rm-dirs := $(CLEAN_DIRS)
>> 1382 clean: rm-files := $(CLEAN_FILES)
1504 1383
1505 PHONY += archclean vmlinuxclean 1384 PHONY += archclean vmlinuxclean
1506 1385
1507 vmlinuxclean: 1386 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1387 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1388 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1389
1511 clean: archclean vmlinuxclean resolve_btfids_ !! 1390 clean: archclean vmlinuxclean
1512 1391
1513 # mrproper - Delete all generated files, incl 1392 # mrproper - Delete all generated files, including .config
1514 # 1393 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1394 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
>> 1395 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs := $(addprefix _mrproper_, 1396 mrproper-dirs := $(addprefix _mrproper_,scripts)
1517 1397
1518 PHONY += $(mrproper-dirs) mrproper 1398 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs): 1399 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1400 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1401
1522 mrproper: clean $(mrproper-dirs) 1402 mrproper: clean $(mrproper-dirs)
>> 1403 $(call cmd,rmdirs)
1523 $(call cmd,rmfiles) 1404 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 1405
1528 # distclean 1406 # distclean
1529 # 1407 #
>> 1408 distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS))
>> 1409 distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
>> 1410
1530 PHONY += distclean 1411 PHONY += distclean
1531 1412
1532 distclean: mrproper 1413 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ !! 1414 $(call cmd,rmdirs)
>> 1415 $(call cmd,rmfiles)
>> 1416 @find $(srctree) $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1417 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* 1418 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536 -o -name 'core' -o -name tags !! 1419 -o -name 'core' \) \
1537 -o -name GPATH -o -name GRTAG <<
1538 -type f -print | xargs rm -f 1420 -type f -print | xargs rm -f
1539 1421
1540 1422
1541 # Packaging of the kernel to various formats 1423 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1424 # ---------------------------------------------------------------------------
1543 1425
1544 %src-pkg: FORCE 1426 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1427 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1546 %pkg: include/config/kernel.release FORCE 1428 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak 1429 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1548 1430
1549 # Brief documentation of the typical targets 1431 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1432 # ---------------------------------------------------------------------------
1551 1433
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1434 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1435 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1436 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1437 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1438
1557 PHONY += help 1439 PHONY += help
1558 help: 1440 help:
1559 @echo 'Cleaning targets:' 1441 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1442 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1443 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1444 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1445 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1446 @echo ''
>> 1447 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1448 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1449 @echo ''
1567 @echo 'Other generic targets:' 1450 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1451 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1452 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1453 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1454 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 1455 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1456 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1457 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1458 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1459 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1460 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1461 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1462 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1463 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1464 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1465 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1466 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1467 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1468 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1469 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1470 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1471 echo ''
1590 @echo 'Static analysers:' 1472 @echo 'Static analysers:'
1591 @echo ' checkstack - Generate !! 1473 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st !! 1474 @echo ' namespacecheck - Name space analysis on compiled kernel'
1593 @echo ' versioncheck - Sanity ch 1475 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1476 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1477 @echo ' export_report - List the usages of all exported symbols'
1596 @echo ' headerdep - Detect in 1478 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit 1479 @echo ' coccicheck - Check with Coccinelle'
1598 @echo ' clang-analyzer - Check wit <<
1599 @echo ' clang-tidy - Check wit <<
1600 @echo '' 1480 @echo ''
1601 @echo 'Tools:' 1481 @echo 'Tools:'
1602 @echo ' nsdeps - Generate 1482 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1603 @echo '' 1483 @echo ''
1604 @echo 'Kernel selftest:' 1484 @echo 'Kernel selftest:'
1605 @echo ' kselftest - Build a !! 1485 @echo ' kselftest - Build and run kernel selftest (run as root)'
1606 @echo ' Build, !! 1486 @echo ' Build, install, and boot kernel before'
1607 @echo ' running !! 1487 @echo ' running kselftest on it'
1608 @echo ' Run as !! 1488 @echo ' kselftest-clean - Remove all generated kselftest files'
1609 @echo ' kselftest-all - Build k !! 1489 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
1610 @echo ' kselftest-install - Build a !! 1490 @echo ' .config.'
1611 @echo ' kselftest-clean - Remove <<
1612 @echo ' kselftest-merge - Merge a <<
1613 @echo ' kselfte <<
1614 @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 '' 1491 @echo ''
1633 @$(if $(dtstree), \ 1492 @$(if $(dtstree), \
1634 echo 'Devicetree:'; \ 1493 echo 'Devicetree:'; \
1635 echo '* dtbs - !! 1494 echo '* dtbs - Build device tree blobs for enabled boards'; \
1636 echo ' dtbs_install - !! 1495 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637 echo ' dt_binding_check - !! 1496 echo ' dt_binding_check - Validate device tree binding documents'; \
1638 echo ' dt_binding_schema - !! 1497 echo ' dtbs_check - Validate device tree source files';\
1639 echo ' dtbs_check - <<
1640 echo '') 1498 echo '')
1641 1499
1642 @echo 'Userspace tools targets:' 1500 @echo 'Userspace tools targets:'
1643 @echo ' use "make tools/help"' 1501 @echo ' use "make tools/help"'
1644 @echo ' or "cd tools; make help"' 1502 @echo ' or "cd tools; make help"'
1645 @echo '' 1503 @echo ''
1646 @echo 'Kernel packaging:' 1504 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi 1505 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1648 @echo '' 1506 @echo ''
1649 @echo 'Documentation targets:' 1507 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ 1508 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651 @echo '' 1509 @echo ''
1652 @echo 'Architecture-specific targets !! 1510 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ !! 1511 @$(if $(archhelp),$(archhelp),\
1654 echo ' No architecture-speci !! 1512 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1513 @echo ''
1656 @$(if $(boards), \ 1514 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1515 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % 1516 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1517 echo '')
1660 @$(if $(board-dirs), \ 1518 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1519 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1520 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1521 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1522 echo '')
1665 1523
1666 @echo ' make V=n [targets] 1: ver !! 1524 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667 @echo ' 2: giv !! 1525 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 1526 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check 1527 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1671 @echo ' (spars 1528 @echo ' (sparse by default)'
1672 @echo ' make C=2 [targets] Force 1529 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1530 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1531 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1532 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1533 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1534 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a <<
1680 @echo ' Multiple leve 1535 @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 '' 1536 @echo ''
1686 @echo 'Execute "make" or "make all" 1537 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1538 @echo 'For further info see the ./README file'
1688 1539
1689 1540
1690 help-board-dirs := $(addprefix help-,$(board- 1541 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1542
1692 help-boards: $(help-board-dirs) 1543 help-boards: $(help-board-dirs)
1693 1544
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1545 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1546
1696 $(help-board-dirs): help-%: 1547 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1548 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1549 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1550 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1551 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1552 echo '')
1702 1553
1703 1554
1704 # Documentation targets 1555 # Documentation targets
1705 # ------------------------------------------- 1556 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1557 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707 linkcheckdocs dochelp refcheck !! 1558 linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS) 1559 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): 1560 $(DOC_TARGETS):
1710 $(Q)$(MAKE) $(build)=Documentation $@ 1561 $(Q)$(MAKE) $(build)=Documentation $@
1711 1562
1712 <<
1713 # Rust targets <<
1714 # ------------------------------------------- <<
1715 <<
1716 # "Is Rust available?" target <<
1717 PHONY += rustavailable <<
1718 rustavailable: <<
1719 +$(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 1563 # Misc
1754 # ------------------------------------------- 1564 # ---------------------------------------------------------------------------
1755 1565
1756 PHONY += misc-check <<
1757 misc-check: <<
1758 $(Q)$(srctree)/scripts/misc-check <<
1759 <<
1760 all: misc-check <<
1761 <<
1762 PHONY += scripts_gdb 1566 PHONY += scripts_gdb
1763 scripts_gdb: prepare0 1567 scripts_gdb: prepare0
1764 $(Q)$(MAKE) $(build)=scripts/gdb 1568 $(Q)$(MAKE) $(build)=scripts/gdb
1765 $(Q)ln -fsn $(abspath $(srctree)/scri 1569 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1766 1570
1767 ifdef CONFIG_GDB_SCRIPTS 1571 ifdef CONFIG_GDB_SCRIPTS
1768 all: scripts_gdb 1572 all: scripts_gdb
1769 endif 1573 endif
1770 1574
1771 else # KBUILD_EXTMOD 1575 else # KBUILD_EXTMOD
1772 1576
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### 1577 ###
1776 # External module support. 1578 # External module support.
1777 # When building external modules the kernel u 1579 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1580 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1581 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands !! 1582 # in the basis kernel ordinary make commands (without M=...) must
>> 1583 # be used.
>> 1584 #
>> 1585 # The following are the only valid targets when building external
>> 1586 # modules.
>> 1587 # make M=dir clean Delete all automatically generated files
>> 1588 # make M=dir modules Make all modules in specified dir
>> 1589 # make M=dir Same as 'make M=dir modules'
>> 1590 # make M=dir modules_install
>> 1591 # Install the modules built in the module directory
>> 1592 # Assumes install directory is already created
1781 1593
1782 # We are always building only modules. !! 1594 # We are always building modules
1783 KBUILD_BUILTIN := <<
1784 KBUILD_MODULES := 1 1595 KBUILD_MODULES := 1
1785 1596
1786 build-dir := $(KBUILD_EXTMOD) !! 1597 PHONY += $(objtree)/Module.symvers
>> 1598 $(objtree)/Module.symvers:
>> 1599 @test -e $(objtree)/Module.symvers || ( \
>> 1600 echo; \
>> 1601 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
>> 1602 echo " is missing; modules will have no dependencies and modversions."; \
>> 1603 echo )
>> 1604
>> 1605 build-dirs := $(KBUILD_EXTMOD)
>> 1606 PHONY += modules
>> 1607 modules: descend $(objtree)/Module.symvers
>> 1608 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
>> 1609
>> 1610 PHONY += modules_install
>> 1611 modules_install: _emodinst_ _emodinst_post
1787 1612
1788 compile_commands.json: $(extmod_prefix)compil !! 1613 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1789 PHONY += compile_commands.json !! 1614 PHONY += _emodinst_
>> 1615 _emodinst_:
>> 1616 $(Q)mkdir -p $(MODLIB)/$(install-dir)
>> 1617 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1618
>> 1619 PHONY += _emodinst_post
>> 1620 _emodinst_post: _emodinst_
>> 1621 $(call cmd,depmod)
1790 1622
1791 clean-dirs := $(KBUILD_EXTMOD) 1623 clean-dirs := $(KBUILD_EXTMOD)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1624 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
1793 $(KBUILD_EXTMOD)/compile_commands.jso <<
1794 1625
1795 PHONY += prepare !! 1626 PHONY += /
1796 # now expand this into a simple variable to r !! 1627 /:
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1628 @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1798 prepare: <<
1799 @if [ "$(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 1629
1805 PHONY += help 1630 PHONY += help
1806 help: 1631 help:
1807 @echo ' Building external modules.' 1632 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1633 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1634 @echo ''
1810 @echo ' modules - default t 1635 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1636 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1637 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1638 @echo ''
1815 1639
1816 ifndef CONFIG_MODULES !! 1640 PHONY += prepare
1817 modules modules_install: __external_modules_e <<
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 <<
1826 endif # KBUILD_EXTMOD 1641 endif # KBUILD_EXTMOD
1827 1642
1828 # ------------------------------------------- <<
1829 # Modules <<
1830 <<
1831 PHONY += modules modules_install modules_sign <<
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 <<
1850 ifdef CONFIG_MODULES <<
1851 <<
1852 $(MODORDER): $(build-dir) <<
1853 @: <<
1854 <<
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t <<
1856 # This is solely useful to speed up test comp <<
1857 modules: modpost <<
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1859 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1860 endif <<
1861 <<
1862 PHONY += modules_check <<
1863 modules_check: $(MODORDER) <<
1864 $(Q)$(CONFIG_SHELL) $(srctree)/script <<
1865 <<
1866 else # CONFIG_MODULES <<
1867 <<
1868 modules: <<
1869 @: <<
1870 <<
1871 KBUILD_MODULES := <<
1872 <<
1873 endif # CONFIG_MODULES <<
1874 <<
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 1643 # Single targets
1881 # ------------------------------------------- 1644 # ---------------------------------------------------------------------------
1882 # To build individual files in subdirectories 1645 # To build individual files in subdirectories, you can do like this:
1883 # 1646 #
1884 # make foo/bar/baz.s 1647 # make foo/bar/baz.s
1885 # 1648 #
1886 # The supported suffixes for single-target ar 1649 # The supported suffixes for single-target are listed in 'single-targets'
1887 # 1650 #
1888 # To build only under specific subdirectories 1651 # To build only under specific subdirectories, you can do like this:
1889 # 1652 #
1890 # make foo/bar/baz/ 1653 # make foo/bar/baz/
1891 1654
1892 ifdef single-build 1655 ifdef single-build
1893 1656
1894 # .ko is special because modpost is needed 1657 # .ko is special because modpost is needed
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG 1658 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1896 single-no-ko := $(filter-out $(single-ko), $( !! 1659 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1897 $(foreach x, o mod, $(patsubs <<
1898 1660
1899 $(single-ko): single_modules !! 1661 $(single-ko): single_modpost
1900 @: 1662 @:
1901 $(single-no-ko): $(build-dir) !! 1663 $(single-no-ko): descend
1902 @: 1664 @:
1903 1665
1904 # Remove MODORDER when done because it is not !! 1666 ifeq ($(KBUILD_EXTMOD),)
1905 PHONY += single_modules !! 1667 # For the single build of in-tree modules, use a temporary file to avoid
1906 single_modules: $(single-no-ko) modules_prepa !! 1668 # the situation of modules_install installing an invalid modules.order.
1907 $(Q){ $(foreach m, $(single-ko), echo !! 1669 MODORDER := .modules.tmp
1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1911 endif 1670 endif
1912 $(Q)rm -f $(MODORDER) <<
1913 1671
1914 single-goals := $(addprefix $(build-dir)/, $( !! 1672 PHONY += single_modpost
>> 1673 single_modpost: $(single-no-ko)
>> 1674 $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
>> 1675 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1915 1676
1916 KBUILD_MODULES := 1 1677 KBUILD_MODULES := 1
1917 1678
>> 1679 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
>> 1680
>> 1681 # trim unrelated directories
>> 1682 build-dirs := $(foreach d, $(build-dirs), \
>> 1683 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
>> 1684
1918 endif 1685 endif
1919 1686
>> 1687 # Handle descending into subdirectories listed in $(build-dirs)
1920 # Preset locale variables to speed up the bui 1688 # Preset locale variables to speed up the build process. Limit locale
1921 # tweaks to this spot to avoid wrong language 1689 # tweaks to this spot to avoid wrong language settings when running
1922 # make menuconfig etc. 1690 # make menuconfig etc.
1923 # Error messages still appears in the origina 1691 # Error messages still appears in the original language
1924 PHONY += $(build-dir) !! 1692 PHONY += descend $(build-dirs)
1925 $(build-dir): prepare !! 1693 descend: $(build-dirs)
1926 $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1694 $(build-dirs): prepare
>> 1695 $(Q)$(MAKE) $(build)=$@ \
>> 1696 single-build=$(if $(filter-out $@/, $(filter $@/%, $(single-no-ko))),1) \
>> 1697 need-builtin=1 need-modorder=1
1927 1698
1928 clean-dirs := $(addprefix _clean_, $(clean-di 1699 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1929 PHONY += $(clean-dirs) clean 1700 PHONY += $(clean-dirs) clean
1930 $(clean-dirs): 1701 $(clean-dirs):
1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea 1702 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1932 1703
1933 clean: $(clean-dirs) 1704 clean: $(clean-dirs)
>> 1705 $(call cmd,rmdirs)
1934 $(call cmd,rmfiles) 1706 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1707 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name !! 1708 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ 1709 -o -name '*.ko.*' \
1938 -o -name '*.dtb' -o -name '*. !! 1710 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1939 -o -name '*.dtb.S' -o -name ' <<
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. 1711 -o -name '*.dwo' -o -name '*.lst' \
1942 -o -name '*.su' -o -name '*.m 1712 -o -name '*.su' -o -name '*.mod' \
1943 -o -name '.*.d' -o -name '.*. 1713 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' 1714 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945 -o -name '*.asn1.[ch]' \ 1715 -o -name '*.asn1.[ch]' \
1946 -o -name '*.symtypes' -o -nam 1716 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1717 -o -name '.tmp_*.o.*' \
1947 -o -name '*.c.[012]*.*' \ 1718 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 1719 -o -name '*.ll' \
1949 -o -name '*.gcno' \ !! 1720 -o -name '*.gcno' \) -type f -print | xargs rm -f
1950 -o -name '*.*.symversions' \) <<
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 1721
1954 # Generate tags for editors 1722 # Generate tags for editors
1955 # ------------------------------------------- 1723 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 1724 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t 1725 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1958 1726
1959 tags TAGS cscope gtags: FORCE 1727 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 1728 $(call cmd,tags)
1961 1729
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1968 $(Q)$(MAKE) $(build)=rust $@ <<
1969 <<
1970 # Script to generate missing namespace depend 1730 # Script to generate missing namespace dependencies
1971 # ------------------------------------------- 1731 # ---------------------------------------------------------------------------
1972 1732
1973 PHONY += nsdeps 1733 PHONY += nsdeps
1974 nsdeps: export KBUILD_NSDEPS=1 1734 nsdeps: export KBUILD_NSDEPS=1
1975 nsdeps: modules 1735 nsdeps: modules
1976 $(Q)$(CONFIG_SHELL) $(srctree)/script 1736 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1977 1737
1978 # Clang Tooling <<
1979 # ------------------------------------------- <<
1980 <<
1981 quiet_cmd_gen_compile_commands = GEN $@ <<
1982 cmd_gen_compile_commands = $(PYTHON3) $ <<
1983 <<
1984 $(extmod_prefix)compile_commands.json: $(srct <<
1985 $(if $(KBUILD_EXTMOD),, vmlinux.a $(K <<
1986 $(if $(CONFIG_MODULES), $(MODORDER)) <<
1987 $(call if_changed,gen_compile_command <<
1988 <<
1989 targets += $(extmod_prefix)compile_commands.j <<
1990 <<
1991 PHONY += clang-tidy clang-analyzer <<
1992 <<
1993 ifdef CONFIG_CC_IS_CLANG <<
1994 quiet_cmd_clang_tools = CHECK $< <<
1995 cmd_clang_tools = $(PYTHON3) $(srctree) <<
1996 <<
1997 clang-tidy clang-analyzer: $(extmod_prefix)co <<
1998 $(call cmd,clang_tools) <<
1999 else <<
2000 clang-tidy clang-analyzer: <<
2001 @echo "$@ requires CC=clang" >&2 <<
2002 @false <<
2003 endif <<
2004 <<
2005 # Scripts to check various things for consist 1738 # Scripts to check various things for consistency
2006 # ------------------------------------------- 1739 # ---------------------------------------------------------------------------
2007 1740
2008 PHONY += includecheck versioncheck coccicheck !! 1741 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2009 1742
2010 includecheck: 1743 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1744 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 1745 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 1746 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 1747
2015 versioncheck: 1748 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1749 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 1750 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 1751 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 1752
2020 coccicheck: 1753 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ 1754 $(Q)$(BASH) $(srctree)/scripts/$@
2022 1755
>> 1756 namespacecheck:
>> 1757 $(PERL) $(srctree)/scripts/namespace.pl
>> 1758
2023 export_report: 1759 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 1760 $(PERL) $(srctree)/scripts/export_report.pl
2025 1761
2026 PHONY += checkstack kernelrelease kernelversi 1762 PHONY += checkstack kernelrelease kernelversion image_name
2027 1763
2028 # UML needs a little special treatment here. 1764 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 1765 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 1766 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 1767 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 1768 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 1769 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 1770 else
2035 CHECKSTACK_ARCH := $(ARCH) 1771 CHECKSTACK_ARCH := $(ARCH)
2036 endif 1772 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 1773 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 1774 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 1775 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 1776
2042 kernelrelease: 1777 kernelrelease:
2043 @$(filechk_kernel.release) !! 1778 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044 1779
2045 kernelversion: 1780 kernelversion:
2046 @echo $(KERNELVERSION) 1781 @echo $(KERNELVERSION)
2047 1782
2048 image_name: 1783 image_name:
2049 @echo $(KBUILD_IMAGE) 1784 @echo $(KBUILD_IMAGE)
2050 1785
2051 PHONY += run-command !! 1786 # Clear a bunch of variables before executing the submake
2052 run-command: !! 1787
2053 $(Q)$(KBUILD_RUN_COMMAND) !! 1788 ifeq ($(quiet),silent_)
>> 1789 tools_silent=s
>> 1790 endif
>> 1791
>> 1792 tools/: FORCE
>> 1793 $(Q)mkdir -p $(objtree)/tools
>> 1794 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
>> 1795
>> 1796 tools/%: FORCE
>> 1797 $(Q)mkdir -p $(objtree)/tools
>> 1798 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
>> 1799
>> 1800 # FIXME Should go into a make.lib or something
>> 1801 # ===========================================================================
>> 1802
>> 1803 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
>> 1804 cmd_rmdirs = rm -rf $(rm-dirs)
2054 1805
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1806 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) !! 1807 cmd_rmfiles = rm -f $(rm-files)
>> 1808
>> 1809 # Run depmod only if we have System.map and depmod is executable
>> 1810 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
>> 1811 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1812 $(KERNELRELEASE)
2057 1813
2058 # read saved command lines for existing targe 1814 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe 1815 existing-targets := $(wildcard $(sort $(targets)))
2060 1816
2061 -include $(foreach f,$(existing-targets),$(di 1817 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062 1818
2063 endif # config-build 1819 endif # config-build
2064 endif # mixed-build 1820 endif # mixed-build
2065 endif # need-sub-make 1821 endif # need-sub-make
2066 1822
2067 PHONY += FORCE 1823 PHONY += FORCE
2068 FORCE: 1824 FORCE:
2069 1825
2070 # Declare the contents of the PHONY variable 1826 # Declare the contents of the PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 1827 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 1828 .PHONY: $(PHONY)
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