1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 !! 2 VERSION = 4
3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 19
4 SUBLEVEL = 5 !! 4 SUBLEVEL = 322
5 EXTRAVERSION = 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = "People's Front"
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)),) !! 14 # That's our default target when none is given on the command line
15 $(error GNU Make >= 4.0 is required. Your Make !! 15 PHONY := _all
16 endif !! 16 _all:
17 17
18 $(if $(filter __%, $(MAKECMDGOALS)), \ !! 18 # o Do not use make's built-in rules and variables
19 $(error targets prefixed with '__' are !! 19 # (this increases performance and avoids hard-to-debug behaviour);
>> 20 # o Look for make include files relative to root of kernel src
>> 21 MAKEFLAGS += -rR --include-dir=$(CURDIR)
20 22
21 # That's our default target when none is given !! 23 # Avoid funny character set dependencies
22 PHONY := __all !! 24 unexport LC_ALL
23 __all: !! 25 LC_COLLATE=C
>> 26 LC_NUMERIC=C
>> 27 export LC_COLLATE LC_NUMERIC
>> 28
>> 29 # Avoid interference with shell env settings
>> 30 unexport GREP_OPTIONS
24 31
25 # We are using a recursive build, so we need t 32 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 33 # to get the ordering right.
27 # 34 #
28 # Most importantly: sub-Makefiles should only 35 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 36 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 37 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 38 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 39 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 40 # after that we are sure that everything which is in that other dir
34 # is now up to date. 41 # is now up to date.
35 # 42 #
36 # The only cases where we need to modify files 43 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 44 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 45 # descending is started. They are now explicitly listed as the
39 # prepare rule. 46 # prepare rule.
40 47
41 this-makefile := $(lastword $(MAKEFILE_LIST)) <<
42 abs_srctree := $(realpath $(dir $(this-makefil <<
43 abs_objtree := $(CURDIR) <<
44 <<
45 ifneq ($(sub_make_done),1) <<
46 <<
47 # Do not use make's built-in rules and variabl <<
48 # (this increases performance and avoids hard- <<
49 MAKEFLAGS += -rR <<
50 <<
51 # Avoid funny character set dependencies <<
52 unexport LC_ALL <<
53 LC_COLLATE=C <<
54 LC_NUMERIC=C <<
55 export LC_COLLATE LC_NUMERIC <<
56 <<
57 # Avoid interference with shell env settings <<
58 unexport GREP_OPTIONS <<
59 <<
60 # Beautify output 48 # Beautify output
61 # -------------------------------------------- 49 # ---------------------------------------------------------------------------
62 # 50 #
63 # Most of build commands in Kbuild start with !! 51 # Normally, we echo the whole command before executing it. By making
64 # "quiet_cmd_*". If defined, the short log is !! 52 # that echo $($(quiet)$(cmd)), we now have the possibility to set
65 # that command is printed by default. !! 53 # $(quiet) to choose other forms of output instead, e.g.
66 # !! 54 #
67 # e.g.) !! 55 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 56 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
69 # cmd_depmod = $(srctree)/scripts/dep !! 57 #
>> 58 # If $(quiet) is empty, the whole command will be printed.
>> 59 # If it is set to "quiet_", only the short version will be printed.
>> 60 # If it is set to "silent_", nothing will be printed at all, since
>> 61 # the variable $(silent_cmd_cc_o_c) doesn't exist.
70 # 62 #
71 # A simple variant is to prefix commands with 63 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 64 # for commands that shall be hidden in non-verbose mode.
73 # 65 #
74 # $(Q)$(MAKE) $(build)=scripts/basic !! 66 # $(Q)ln $@ :<
75 # 67 #
76 # If KBUILD_VERBOSE contains 1, the whole comm !! 68 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
77 # If KBUILD_VERBOSE contains 2, the reason for !! 69 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
78 # 70 #
79 # To put more focus on warnings, be less verbo 71 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 72 # Use 'make V=1' to see the full commands
81 73
82 ifeq ("$(origin V)", "command line") 74 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 75 KBUILD_VERBOSE = $(V)
84 endif 76 endif
>> 77 ifndef KBUILD_VERBOSE
>> 78 KBUILD_VERBOSE = 0
>> 79 endif
85 80
86 quiet = quiet_ !! 81 ifeq ($(KBUILD_VERBOSE),1)
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = 82 quiet =
91 Q = 83 Q =
>> 84 else
>> 85 quiet=quiet_
>> 86 Q = @
92 endif 87 endif
93 88
94 # If the user is running make -s (silent mode) 89 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 90 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !! 91 # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
97 quiet=silent_ <<
98 override KBUILD_VERBOSE := <<
99 endif <<
100 92
101 export quiet Q KBUILD_VERBOSE !! 93 ifeq ($(filter 3.%,$(MAKE_VERSION)),)
102 !! 94 silence:=$(findstring s,$(firstword -$(MAKEFLAGS)))
103 # Call a source code checker (by default, "spa !! 95 else
104 # C compilation. !! 96 silence:=$(findstring s,$(filter-out --%,$(MAKEFLAGS)))
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 $(KBUILD_EXTM <<
146 endif 97 endif
147 98
148 export KBUILD_EXTMOD !! 99 ifeq ($(silence),s)
149 !! 100 quiet=silent_
150 # backward compatibility !! 101 tools_silent=s
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif 102 endif
156 103
157 export KBUILD_EXTRA_WARN !! 104 export quiet Q KBUILD_VERBOSE
158 105
159 # Kbuild will save output files in the current !! 106 # kbuild supports saving output files in a separate directory.
160 # This does not need to match to the root of t !! 107 # To locate output files in a separate directory two syntaxes are supported.
161 # !! 108 # In both cases the working directory must be the root of the kernel src.
162 # For example, you can do this: <<
163 # <<
164 # cd /dir/to/store/output/files; make -f /dir <<
165 # <<
166 # If you want to save output files in a differ <<
167 # two syntaxes to specify it. <<
168 # <<
169 # 1) O= 109 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 110 # Use "make O=dir/to/store/output/files/"
171 # 111 #
172 # 2) Set KBUILD_OUTPUT 112 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t !! 113 # Set the environment variable KBUILD_OUTPUT to point to the directory
174 # export KBUILD_OUTPUT=dir/to/store/output/fil !! 114 # where the output files shall be placed.
>> 115 # export KBUILD_OUTPUT=dir/to/store/output/files/
>> 116 # make
175 # 117 #
176 # The O= assignment takes precedence over the 118 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 119 # variable.
178 120
179 # Do we want to change the working directory? !! 121 # KBUILD_SRC is not intended to be used by the regular user (for now),
>> 122 # it is set on invocation of make with KBUILD_OUTPUT or O= specified.
>> 123 ifeq ($(KBUILD_SRC),)
>> 124
>> 125 # OK, Make called in directory where kernel src resides
>> 126 # Do we want to locate output files in a separate directory?
180 ifeq ("$(origin O)", "command line") 127 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 128 KBUILD_OUTPUT := $(O)
182 endif 129 endif
183 130
184 ifneq ($(KBUILD_OUTPUT),) !! 131 # Cancel implicit rules on top Makefile
185 # $(realpath ...) gets empty if the path does !! 132 $(CURDIR)/Makefile Makefile: ;
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") <<
187 # $(realpath ...) resolves symlinks <<
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) <<
189 $(if $(abs_objtree),,$(error failed to create <<
190 endif # ifneq ($(KBUILD_OUTPUT),) <<
191 133
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 134 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
193 $(error source directory cannot contain spaces !! 135 $(error main directory cannot contain spaces nor colons)
194 endif 136 endif
195 137
196 export sub_make_done := 1 !! 138 ifneq ($(KBUILD_OUTPUT),)
>> 139 # check that the output directory actually exists
>> 140 saved-output := $(KBUILD_OUTPUT)
>> 141 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
>> 142 && pwd)
>> 143 $(if $(KBUILD_OUTPUT),, \
>> 144 $(error failed to create output directory "$(saved-output)"))
197 145
198 endif # sub_make_done !! 146 PHONY += $(MAKECMDGOALS) sub-make
199 147
200 ifeq ($(abs_objtree),$(CURDIR)) !! 148 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
201 # Suppress "Entering directory ..." if we are !! 149 @:
202 no-print-directory := --no-print-directory <<
203 else <<
204 # Recursion to show "Entering directory ..." <<
205 need-sub-make := 1 <<
206 endif <<
207 150
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 151 # Invoke a second make in the output directory, passing relevant variables
209 # If --no-print-directory is unset, recurse on !! 152 sub-make:
210 # You may end up recursing into __sub-make twi !! 153 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
211 # behavior change in GNU Make 4.4.1. !! 154 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
212 need-sub-make := 1 <<
213 endif <<
214 155
215 ifeq ($(need-sub-make),1) !! 156 # Leave processing to above invocation of make
>> 157 skip-makefile := 1
>> 158 endif # ifneq ($(KBUILD_OUTPUT),)
>> 159 endif # ifeq ($(KBUILD_SRC),)
216 160
217 PHONY += $(MAKECMDGOALS) __sub-make !! 161 # We process the rest of the Makefile if this is the final invocation of make
>> 162 ifeq ($(skip-makefile),)
218 163
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 164 # Do not print "Entering directory ...",
220 @: !! 165 # but we want to display it when entering to the output directory
>> 166 # so that IDEs/editors are able to understand relative filenames.
>> 167 MAKEFLAGS += --no-print-directory
221 168
222 # Invoke a second make in the output directory !! 169 # Call a source code checker (by default, "sparse") as part of the
223 __sub-make: !! 170 # C compilation.
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 171 #
225 -f $(abs_srctree)/Makefile $(MAKECMDGO !! 172 # Use 'make C=1' to enable checking of only re-compiled files.
>> 173 # Use 'make C=2' to enable checking of *all* source files, regardless
>> 174 # of whether they are re-compiled or not.
>> 175 #
>> 176 # See the file "Documentation/dev-tools/sparse.rst" for more details,
>> 177 # including where to get the "sparse" utility.
>> 178
>> 179 ifeq ("$(origin C)", "command line")
>> 180 KBUILD_CHECKSRC = $(C)
>> 181 endif
>> 182 ifndef KBUILD_CHECKSRC
>> 183 KBUILD_CHECKSRC = 0
>> 184 endif
226 185
227 else # need-sub-make !! 186 # Use make M=dir to specify directory of external module to build
>> 187 # Old syntax make ... SUBDIRS=$PWD is still supported
>> 188 # Setting the environment variable KBUILD_EXTMOD take precedence
>> 189 ifdef SUBDIRS
>> 190 KBUILD_EXTMOD ?= $(SUBDIRS)
>> 191 endif
228 192
229 # We process the rest of the Makefile if this !! 193 ifeq ("$(origin M)", "command line")
>> 194 KBUILD_EXTMOD := $(M)
>> 195 endif
230 196
231 ifeq ($(abs_srctree),$(abs_objtree)) !! 197 ifeq ($(KBUILD_SRC),)
232 # building in the source tree 198 # building in the source tree
233 srctree := . 199 srctree := .
234 building_out_of_srctree := <<
235 else 200 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt !! 201 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
237 # building in a subdirectory o 202 # building in a subdirectory of the source tree
238 srctree := .. 203 srctree := ..
239 else 204 else
240 srctree := $(abs_srctree) !! 205 srctree := $(KBUILD_SRC)
241 endif 206 endif
242 building_out_of_srctree := 1 <<
243 endif 207 endif
244 208
245 ifneq ($(KBUILD_ABS_SRCTREE),) !! 209 export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
246 srctree := $(abs_srctree) <<
247 endif <<
248 210
249 objtree := . 211 objtree := .
>> 212 src := $(srctree)
>> 213 obj := $(objtree)
250 214
251 VPATH := !! 215 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
252 216
253 ifeq ($(KBUILD_EXTMOD),) !! 217 export srctree objtree VPATH
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) <<
256 endif <<
257 endif <<
258 <<
259 export building_out_of_srctree srctree objtree <<
260 218
261 # To make sure we do not include .config for a 219 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 220 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 221 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 222 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 223 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 224 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 225 # of make so .config is not included in this case either (for *config).
268 226
269 version_h := include/generated/uapi/linux/vers 227 version_h := include/generated/uapi/linux/version.h
>> 228 old_version_h := include/linux/version.h
270 229
271 clean-targets := %clean mrproper cleandocs 230 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 231 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 232 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers !! 233 $(version_h) headers_% archheaders archscripts \
275 %asm-generic kernelve !! 234 %asm-generic kernelversion %src-pkg
276 outputmakefile rustav !! 235 no-sync-config-targets := $(no-dot-config-targets) install %install \
277 no-sync-config-targets := $(no-dot-config-targ !! 236 kernelrelease
278 image_name !! 237
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 238 config-targets := 0
280 !! 239 mixed-targets := 0
281 config-build := !! 240 dot-config := 1
282 mixed-build := !! 241 may-sync-config := 1
283 need-config := 1 <<
284 may-sync-config := 1 <<
285 single-build := <<
286 242
287 ifneq ($(filter $(no-dot-config-targets), $(MA 243 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 244 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 245 dot-config := 0
290 endif !! 246 endif
291 endif 247 endif
292 248
293 ifneq ($(filter $(no-sync-config-targets), $(M 249 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 250 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 251 may-sync-config := 0
296 endif !! 252 endif
297 endif 253 endif
298 254
299 need-compiler := $(may-sync-config) <<
300 <<
301 ifneq ($(KBUILD_EXTMOD),) 255 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 256 may-sync-config := 0
303 endif 257 endif
304 258
305 ifeq ($(KBUILD_EXTMOD),) 259 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 260 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 261 config-targets := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 262 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 263 mixed-targets := 1
>> 264 endif
310 endif 265 endif
311 endif <<
312 endif <<
313 <<
314 # We cannot build single targets and the other <<
315 ifneq ($(filter $(single-targets), $(MAKECMDGO <<
316 single-build := 1 <<
317 ifneq ($(filter-out $(single-targets), $(M <<
318 mixed-build := 1 <<
319 endif <<
320 endif 266 endif
321 267
322 # For "make -j clean all", "make -j mrproper d 268 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 269 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 270 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 271 mixed-targets := 1
326 endif !! 272 endif
327 endif 273 endif
328 274
329 # install and modules_install need also be pro 275 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 276 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 277 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 278 mixed-targets := 1
333 endif !! 279 endif
334 endif 280 endif
335 281
336 ifdef mixed-build !! 282 ifeq ($(mixed-targets),1)
337 # ============================================ 283 # ===========================================================================
338 # We're called with mixed targets (*config and 284 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 285 # Handle them one by one.
340 286
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 287 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 288
343 $(MAKECMDGOALS): __build_one_by_one !! 289 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
344 @: 290 @:
345 291
346 __build_one_by_one: 292 __build_one_by_one:
347 $(Q)set -e; \ 293 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 294 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 295 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 296 done
351 297
352 else # !mixed-build !! 298 else
353 299
354 include $(srctree)/scripts/Kbuild.include !! 300 # We need some generic definitions (do not try to remake the file).
>> 301 scripts/Kbuild.include: ;
>> 302 include scripts/Kbuild.include
355 303
356 # Read KERNELRELEASE from include/config/kerne 304 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 305 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 306 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 307 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 308
361 include $(srctree)/scripts/subarch.include !! 309 include scripts/subarch.include
362 310
363 # Cross compiling and selecting different set 311 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 312 # ---------------------------------------------------------------------------
365 # 313 #
366 # When performing cross compilation for other 314 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 315 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 316 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 317 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 318 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 319 # The default ARCH is the host where make is executed.
372 320
373 # CROSS_COMPILE specify the prefix used for al 321 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 322 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 323 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 324 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 325 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 326 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 327 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 328 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 329 ARCH ?= $(SUBARCH)
382 330
383 # Architecture as present in compile.h 331 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 332 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 333 SRCARCH := $(ARCH)
386 334
387 # Additional ARCH settings for x86 335 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 336 ifeq ($(ARCH),i386)
389 SRCARCH := x86 337 SRCARCH := x86
390 endif 338 endif
391 ifeq ($(ARCH),x86_64) 339 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 340 SRCARCH := x86
393 endif 341 endif
394 342
395 # Additional ARCH settings for sparc 343 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 344 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 345 SRCARCH := sparc
398 endif 346 endif
399 ifeq ($(ARCH),sparc64) 347 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 348 SRCARCH := sparc
401 endif 349 endif
402 350
403 # Additional ARCH settings for parisc !! 351 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64) !! 352 ifeq ($(ARCH),sh64)
405 SRCARCH := parisc !! 353 SRCARCH := sh
406 endif <<
407 <<
408 export cross_compiling := <<
409 ifneq ($(SRCARCH),$(SUBARCH)) <<
410 cross_compiling := 1 <<
411 endif 354 endif
412 355
413 KCONFIG_CONFIG ?= .config 356 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 357 export KCONFIG_CONFIG
415 358
416 # SHELL used by kbuild 359 # SHELL used by kbuild
417 CONFIG_SHELL := sh !! 360 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
>> 361 else if [ -x /bin/bash ]; then echo /bin/bash; \
>> 362 else echo sh; fi ; fi)
418 363
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 364 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 365 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 366 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 367
423 ifneq ($(LLVM),) 368 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),) !! 369 HOSTCC = clang
425 LLVM_PREFIX := $(LLVM) !! 370 HOSTCXX = clang++
426 else ifneq ($(filter -%,$(LLVM)),) <<
427 LLVM_SUFFIX := $(LLVM) <<
428 endif <<
429 <<
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) <<
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) <<
432 else 371 else
433 HOSTCC = gcc 372 HOSTCC = gcc
434 HOSTCXX = g++ 373 HOSTCXX = g++
435 endif 374 endif
436 HOSTRUSTC = rustc !! 375 KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
437 HOSTPKG_CONFIG = pkg-config !! 376 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
438 !! 377 $(HOSTCFLAGS)
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 378 KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
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 379 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 380 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 381
471 # Make variables (CC, etc...) 382 # Make variables (CC, etc...)
472 CPP = $(CC) -E 383 CPP = $(CC) -E
473 ifneq ($(LLVM),) 384 ifneq ($(LLVM),)
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU !! 385 CC = clang
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S !! 386 LD = ld.lld
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ !! 387 AR = llvm-ar
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ !! 388 NM = llvm-nm
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( !! 389 OBJCOPY = llvm-objcopy
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( !! 390 OBJDUMP = llvm-objdump
480 READELF = $(LLVM_PREFIX)llvm-readelf$( !! 391 READELF = llvm-readelf
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL !! 392 OBJSIZE = llvm-size
>> 393 STRIP = llvm-strip
482 else 394 else
483 CC = $(CROSS_COMPILE)gcc 395 CC = $(CROSS_COMPILE)gcc
484 LD = $(CROSS_COMPILE)ld 396 LD = $(CROSS_COMPILE)ld
485 AR = $(CROSS_COMPILE)ar 397 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 398 NM = $(CROSS_COMPILE)nm
487 OBJCOPY = $(CROSS_COMPILE)objcopy 399 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 400 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf 401 READELF = $(CROSS_COMPILE)readelf
>> 402 OBJSIZE = $(CROSS_COMPILE)size
490 STRIP = $(CROSS_COMPILE)strip 403 STRIP = $(CROSS_COMPILE)strip
491 endif 404 endif
492 RUSTC = rustc <<
493 RUSTDOC = rustdoc <<
494 RUSTFMT = rustfmt <<
495 CLIPPY_DRIVER = clippy-driver <<
496 BINDGEN = bindgen <<
497 PAHOLE = pahole <<
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve <<
499 LEX = flex 405 LEX = flex
500 YACC = bison 406 YACC = bison
501 AWK = awk 407 AWK = awk
>> 408 GENKSYMS = scripts/genksyms/genksyms
502 INSTALLKERNEL := installkernel 409 INSTALLKERNEL := installkernel
>> 410 DEPMOD = depmod
503 PERL = perl 411 PERL = perl
>> 412 PYTHON = python
>> 413 PYTHON2 = python2
504 PYTHON3 = python3 414 PYTHON3 = python3
505 CHECK = sparse 415 CHECK = sparse
506 BASH = bash <<
507 KGZIP = gzip <<
508 KBZIP2 = bzip2 <<
509 KLZOP = lzop <<
510 LZMA = lzma <<
511 LZ4 = lz4c <<
512 XZ = xz <<
513 ZSTD = zstd <<
514 416
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 417 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 418 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := !! 419 NOSTDINC_FLAGS =
518 CFLAGS_MODULE = 420 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 421 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 422 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 423 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 424 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 425 LDFLAGS_vmlinux =
526 426
527 # Use USERINCLUDE when you must reference the 427 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 428 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 429 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 430 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 431 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 432 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li <<
534 -include $(srctree)/include/li 433 -include $(srctree)/include/linux/kconfig.h
535 434
536 # Use LINUXINCLUDE when you must reference the 435 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 436 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 437 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 438 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 439 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree !! 440 $(if $(KBUILD_SRC), -I$(srctree)/include) \
542 -I$(objtree)/include \ 441 -I$(objtree)/include \
543 $(USERINCLUDE) 442 $(USERINCLUDE)
544 443
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE !! 444 KBUILD_AFLAGS := -D__ASSEMBLY__
546 !! 445 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS := !! 446 -fno-strict-aliasing -fno-common -fshort-wchar \
548 KBUILD_CFLAGS += -std=gnu11 !! 447 -Werror-implicit-function-declaration \
549 KBUILD_CFLAGS += -fshort-wchar !! 448 -Werror=return-type -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char !! 449 -std=gnu89
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 450 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 := 451 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 452 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 453 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 454 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE !! 455 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
570 KBUILD_LDFLAGS_MODULE := <<
571 KBUILD_LDFLAGS := 456 KBUILD_LDFLAGS :=
>> 457 GCC_PLUGINS_CFLAGS :=
572 CLANG_FLAGS := 458 CLANG_FLAGS :=
573 459
574 ifeq ($(KBUILD_CLIPPY),1) !! 460 export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY !! 461 export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) !! 462 export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
577 else !! 463 export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
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 <<
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS <<
597 464
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 465 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 466 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 467 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 468 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 469 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 470 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
>> 471 export KBUILD_ARFLAGS
>> 472
>> 473 # When compiling out-of-tree modules, put MODVERDIR in the module
>> 474 # tree rather than in the kernel tree. The kernel tree might
>> 475 # even be read-only.
>> 476 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
604 477
605 # Files to ignore in find ... statements 478 # Files to ignore in find ... statements
606 479
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 480 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 481 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 482 -prune -o
>> 483 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 484 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 485
611 # ============================================ 486 # ===========================================================================
612 # Rules shared between *config targets and bui 487 # Rules shared between *config targets and build targets
613 488
614 # Basic helpers built in scripts/basic/ 489 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic 490 PHONY += scripts_basic
616 scripts_basic: 491 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 492 $(Q)$(MAKE) $(build)=scripts/basic
>> 493 $(Q)rm -f .tmp_quiet_recordmcount
>> 494
>> 495 # To avoid any implicit rule to kick in, define an empty command.
>> 496 scripts/basic/%: scripts_basic ;
618 497
619 PHONY += outputmakefile 498 PHONY += outputmakefile
620 ifdef building_out_of_srctree <<
621 # Before starting out-of-tree build, make sure <<
622 # outputmakefile generates a Makefile in the o 499 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 500 # separate output directory. This allows convenient use of make in the
624 # output directory. 501 # output directory.
625 # At the same time when output Makefile genera <<
626 # 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: 502 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ !! 503 ifneq ($(KBUILD_SRC),)
636 -d $(srctree)/include/config <<
637 -d $(srctree)/arch/$(SRCARCH) <<
638 echo >&2 "***"; \ <<
639 echo >&2 "*** The source tree <<
640 echo >&2 "*** in $(abs_srctree <<
641 echo >&2 "***"; \ <<
642 false; \ <<
643 fi <<
644 $(Q)ln -fsn $(srctree) source 504 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) !! 505 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
646 $(Q)test -e .gitignore || \ !! 506 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
647 { echo "# this is build directory, ign <<
648 endif 507 endif
649 508
>> 509 ifeq ($(cc-name),clang)
>> 510 ifneq ($(CROSS_COMPILE),)
>> 511 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
>> 512 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
>> 513 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
>> 514 GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
>> 515 endif
>> 516 ifneq ($(GCC_TOOLCHAIN),)
>> 517 CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
>> 518 endif
>> 519 ifneq ($(LLVM_IAS),1)
>> 520 CLANG_FLAGS += -no-integrated-as
>> 521 endif
>> 522 CLANG_FLAGS += -Werror=unknown-warning-option
>> 523 KBUILD_CFLAGS += $(CLANG_FLAGS)
>> 524 KBUILD_AFLAGS += $(CLANG_FLAGS)
>> 525 export CLANG_FLAGS
>> 526 endif
>> 527
>> 528 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
>> 529 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
>> 530 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
>> 531 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
>> 532 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
>> 533 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
>> 534 export RETPOLINE_CFLAGS
>> 535 export RETPOLINE_VDSO_CFLAGS
>> 536
>> 537 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
>> 538 KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
>> 539
650 # The expansion should be delayed until arch/$ 540 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a 541 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig ( 542 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det 543 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 544 CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1)
655 <<
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), <<
657 include $(srctree)/scripts/Makefile.clang <<
658 endif <<
659 545
660 # Include this also for config targets because !! 546 ifeq ($(config-targets),1)
661 # cc-cross-prefix to determine CROSS_COMPILE. <<
662 ifdef need-compiler <<
663 include $(srctree)/scripts/Makefile.compiler <<
664 endif <<
665 <<
666 ifdef config-build <<
667 # ============================================ 547 # ===========================================================================
668 # *config targets only - make sure prerequisit 548 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 549 # in scripts/kconfig to make the *config target
670 550
671 # Read arch-specific Makefile to set KBUILD_DE !! 551 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 552 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 553 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile !! 554 include arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 555 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676 556
677 config: outputmakefile scripts_basic FORCE !! 557 config: scripts_basic outputmakefile FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 558 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 559
680 %config: outputmakefile scripts_basic FORCE !! 560 %config: scripts_basic outputmakefile FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 561 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 562
683 else #!config-build !! 563 else
684 # ============================================ 564 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 565 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 566 # targets and others. In general all targets except *config targets.
687 567
688 # If building an external module we do not car 568 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules !! 569 # but instead _all depend on modules
690 PHONY += all 570 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),) 571 ifeq ($(KBUILD_EXTMOD),)
692 __all: all !! 572 _all: all
693 else 573 else
694 __all: modules !! 574 _all: modules
695 endif 575 endif
696 576
697 targets := <<
698 <<
699 # Decide whether to build built-in, modular, o 577 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in. 578 # Normally, just do built-in.
701 579
702 KBUILD_MODULES := 580 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1 581 KBUILD_BUILTIN := 1
704 582
705 # If we have only "make modules", don't compil 583 # If we have only "make modules", don't compile built-in objects.
706 ifeq ($(MAKECMDGOALS),modules) 584 ifeq ($(MAKECMDGOALS),modules)
707 KBUILD_BUILTIN := 585 KBUILD_BUILTIN :=
708 endif 586 endif
709 587
710 # If we have "make <whatever> modules", compil 588 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway. 589 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module 590 # Just "make" or "make all" shall build modules as well
713 591
714 ifneq ($(filter all modules nsdeps %compile_co !! 592 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 593 KBUILD_MODULES := 1
716 endif 594 endif
717 595
718 ifeq ($(MAKECMDGOALS),) 596 ifeq ($(MAKECMDGOALS),)
719 KBUILD_MODULES := 1 597 KBUILD_MODULES := 1
720 endif 598 endif
721 599
722 export KBUILD_MODULES KBUILD_BUILTIN 600 export KBUILD_MODULES KBUILD_BUILTIN
723 601
724 ifdef need-config <<
725 include include/config/auto.conf <<
726 endif <<
727 <<
728 ifeq ($(KBUILD_EXTMOD),) 602 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs 603 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y := !! 604 init-y := init/
731 drivers-y := !! 605 drivers-y := drivers/ sound/ firmware/
>> 606 net-y := net/
732 libs-y := lib/ 607 libs-y := lib/
>> 608 core-y := usr/
>> 609 virt-y := virt/
733 endif # KBUILD_EXTMOD 610 endif # KBUILD_EXTMOD
734 611
>> 612 ifeq ($(dot-config),1)
>> 613 include include/config/auto.conf
>> 614 endif
>> 615
735 # The all: target is the default when no targe 616 # The all: target is the default when no target is given on the
736 # command line. 617 # command line.
737 # This allow a user to issue only 'make' to bu 618 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 619 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 620 all: vmlinux
740 621
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover !! 622 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
742 ifdef CONFIG_CC_IS_GCC !! 623 $(call cc-option,-fno-tree-loop-im) \
743 CFLAGS_GCOV += -fno-tree-loop-im !! 624 $(call cc-disable-warning,maybe-uninitialized,)
744 endif <<
745 export CFLAGS_GCOV 625 export CFLAGS_GCOV
746 626
747 # The arch Makefiles can override CC_FLAGS_FTR 627 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER 628 ifdef CONFIG_FUNCTION_TRACER
749 CC_FLAGS_FTRACE := -pg 629 CC_FLAGS_FTRACE := -pg
750 endif 630 endif
751 631
752 include $(srctree)/arch/$(SRCARCH)/Makefile !! 632 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
>> 633 # values of the respective KBUILD_* variables
>> 634 ARCH_CPPFLAGS :=
>> 635 ARCH_AFLAGS :=
>> 636 ARCH_CFLAGS :=
>> 637 include arch/$(SRCARCH)/Makefile
753 638
754 ifdef need-config !! 639 ifeq ($(dot-config),1)
755 ifdef may-sync-config !! 640 ifeq ($(may-sync-config),1)
756 # Read in dependencies to all Kconfig* files, 641 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include 642 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP 643 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd 644 include include/config/auto.conf.cmd
760 645
761 $(KCONFIG_CONFIG): !! 646 # To avoid any implicit rule to kick in, define an empty command
762 @echo >&2 '***' !! 647 $(KCONFIG_CONFIG): ;
763 @echo >&2 '*** Configuration file "$@" <<
764 @echo >&2 '***' <<
765 @echo >&2 '*** Please run some configu <<
766 @echo >&2 '*** "make menuconfig" or "m <<
767 @echo >&2 '***' <<
768 @/bin/false <<
769 648
770 # The actual configuration files used during t 649 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda 650 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con 651 # include/config/auto.conf (which mirrors .config).
773 # 652 #
774 # This exploits the 'multi-target pattern rule 653 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once 654 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b !! 655 %/auto.conf %/auto.conf.cmd %/tristate.conf: $(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 656 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config !! 657 else
784 # External modules and some install targets ne 658 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care 659 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test 660 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf 661 PHONY += include/config/auto.conf
788 662
789 include/config/auto.conf: 663 include/config/auto.conf:
790 @test -e include/generated/autoconf.h !! 664 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
791 echo >&2; 665 echo >&2; \
792 echo >&2 " ERROR: Kernel configuratio 666 echo >&2 " ERROR: Kernel configuration is invalid."; \
793 echo >&2 " include/generated/a 667 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
794 echo >&2 " Run 'make oldconfig 668 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
795 echo >&2 ; 669 echo >&2 ; \
796 /bin/false) 670 /bin/false)
797 671
798 endif # may-sync-config 672 endif # may-sync-config
799 endif # need-config !! 673 endif # $(dot-config)
800 674
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch !! 675 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
>> 676 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 677 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 678 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 679 KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
>> 680 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
802 681
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE !! 682 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
804 KBUILD_CFLAGS += -O2 !! 683 KBUILD_CFLAGS += -Os
805 KBUILD_RUSTFLAGS += -Copt-level=2 !! 684 else
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE !! 685 KBUILD_CFLAGS += -O2
807 KBUILD_CFLAGS += -Os !! 686 endif
808 KBUILD_RUSTFLAGS += -Copt-level=s <<
809 endif <<
810 <<
811 # Always set `debug-assertions` and `overflow- <<
812 # depends on `opt-level` and `debug-assertions <<
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( <<
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C <<
815 687
816 # Tell gcc to never replace conditional load w 688 # 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 689 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 690 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
822 endif !! 691
>> 692 include scripts/Makefile.kcov
>> 693 include scripts/Makefile.gcc-plugins
823 694
824 ifdef CONFIG_READABLE_ASM 695 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 696 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 697 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 698 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 699 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 700 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
>> 701 $(call cc-option,-fno-ipa-cp-clone,) \
>> 702 $(call cc-option,-fno-partial-inlining)
>> 703 endif
>> 704
>> 705 ifneq ($(CONFIG_FRAME_WARN),0)
>> 706 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
830 endif 707 endif
831 708
832 stackp-flags-y !! 709 stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR) 710 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 711 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
835 712
836 KBUILD_CFLAGS += $(stackp-flags-y) 713 KBUILD_CFLAGS += $(stackp-flags-y)
837 714
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 715 ifeq ($(cc-name),clang)
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 716 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
>> 717 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
>> 718 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
>> 719 # Quiet clang warning: comparison of unsigned expression < 0 is always false
>> 720 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
>> 721 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
>> 722 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>> 723 # See modpost pattern 2
>> 724 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
>> 725 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
>> 726 endif
>> 727
>> 728 # These warnings generated too much noise in a regular build.
>> 729 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 730 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
>> 731
>> 732 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
>> 733
>> 734 # These result in bogus false positives
>> 735 KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
840 736
841 ifdef CONFIG_FRAME_POINTER 737 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 738 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 739 else
845 # Some targets (ARM with Thumb2, for example), 740 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 741 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 742 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 743 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 744 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER 745 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 746 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 747 endif
855 endif 748 endif
856 749
857 # Initialize all stack variables with a 0xAA p !! 750 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN <<
859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat <<
860 endif <<
861 751
862 # Initialize all stack variables with a zero v !! 752 ifdef CONFIG_DEBUG_INFO
863 ifdef CONFIG_INIT_STACK_ALL_ZERO !! 753 ifdef CONFIG_DEBUG_INFO_SPLIT
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer !! 754 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 755 else
866 # https://github.com/llvm/llvm-project/issues/ !! 756 KBUILD_CFLAGS += -g
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 757 endif
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER !! 758 ifeq ($(LLVM_IAS),1)
869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA !! 759 KBUILD_AFLAGS += -g
>> 760 else
>> 761 KBUILD_AFLAGS += -Wa,-gdwarf-2
870 endif 762 endif
871 endif 763 endif
872 764
873 # While VLAs have been removed, GCC produces u !! 765 ifdef CONFIG_DEBUG_INFO_DWARF4
874 # for the randomize_kstack_offset feature. Dis !! 766 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac !! 767 endif
876 768
877 # Clear used registers at func exit (to reduce !! 769 ifdef CONFIG_DEBUG_INFO_REDUCED
878 ifdef CONFIG_ZERO_CALL_USED_REGS !! 770 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- !! 771 $(call cc-option,-fno-var-tracking)
880 endif 772 endif
881 773
882 ifdef CONFIG_FUNCTION_TRACER 774 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC !! 775 ifdef CONFIG_FTRACE_MCOUNT_RECORD
884 CC_FLAGS_FTRACE += -mrecord-mcount !! 776 # gcc 5 supports generating the mcount tables directly
>> 777 ifeq ($(call cc-option-yn,-mrecord-mcount),y)
>> 778 CC_FLAGS_FTRACE += -mrecord-mcount
>> 779 export CC_USING_RECORD_MCOUNT := 1
>> 780 endif
885 ifdef CONFIG_HAVE_NOP_MCOUNT 781 ifdef CONFIG_HAVE_NOP_MCOUNT
886 ifeq ($(call cc-option-yn, -mnop-mcount),y 782 ifeq ($(call cc-option-yn, -mnop-mcount),y)
887 CC_FLAGS_FTRACE += -mnop-mcount 783 CC_FLAGS_FTRACE += -mnop-mcount
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 784 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
889 endif 785 endif
890 endif 786 endif
891 endif 787 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 788 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr <<
905 ifeq ($(call cc-option-yn, -mfentry),y) 789 ifeq ($(call cc-option-yn, -mfentry),y)
906 CC_FLAGS_FTRACE += -mfentry 790 CC_FLAGS_FTRACE += -mfentry
907 CC_FLAGS_USING += -DCC_USING_FENTRY 791 CC_FLAGS_USING += -DCC_USING_FENTRY
908 endif 792 endif
909 endif 793 endif
910 export CC_FLAGS_FTRACE 794 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 795 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 796 KBUILD_AFLAGS += $(CC_FLAGS_USING)
>> 797 ifdef CONFIG_DYNAMIC_FTRACE
>> 798 ifdef CONFIG_HAVE_C_RECORDMCOUNT
>> 799 BUILD_C_RECORDMCOUNT := y
>> 800 export BUILD_C_RECORDMCOUNT
>> 801 endif
>> 802 endif
913 endif 803 endif
914 804
915 # We trigger additional mismatches with less i 805 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 806 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 807 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif 808 endif
919 809
920 # `rustc`'s `-Zfunction-sections` applies to d <<
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 810 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 811 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections 812 LDFLAGS_vmlinux += --gc-sections
925 endif 813 endif
926 814
927 ifdef CONFIG_SHADOW_CALL_STACK !! 815 # arch Makefile may override CC so keep this after arch Makefile is included
928 ifndef CONFIG_DYNAMIC_SCS !! 816 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac <<
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) <<
931 endif <<
932 export CC_FLAGS_SCS <<
933 endif <<
934 817
935 ifdef CONFIG_LTO_CLANG !! 818 # warn about C99 declaration after statement
936 ifdef CONFIG_LTO_CLANG_THIN !! 819 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit <<
938 else <<
939 CC_FLAGS_LTO := -flto <<
940 endif <<
941 CC_FLAGS_LTO += -fvisibility=hidden <<
942 820
943 # Limit inlining across translation units to r !! 821 # disable pointer signed / unsigned warnings in gcc 4.0
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 !! 822 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
945 endif <<
946 823
947 ifdef CONFIG_LTO !! 824 # disable stringop warnings in gcc 8+
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) !! 825 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
949 KBUILD_AFLAGS += -fno-lto <<
950 export CC_FLAGS_LTO <<
951 endif <<
952 826
953 ifdef CONFIG_CFI_CLANG !! 827 # We'll want to enable this eventually, but it's not going away for 5.7 at least
954 CC_FLAGS_CFI := -fsanitize=kcfi !! 828 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) !! 829 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
956 export CC_FLAGS_CFI !! 830 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
957 endif <<
958 831
959 # Architectures can define flags to add/remove !! 832 # Another good warning that we'll want to enable eventually
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 833 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 834
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) !! 835 # Enabled with W=2, disabled by default as noisy
965 # Set the minimal function alignment. Use the !! 836 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
966 # -fmin-function-alignment if it is available, <<
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
970 else <<
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
972 endif <<
973 endif <<
974 <<
975 # arch Makefile may override CC so keep this a <<
976 NOSTDINC_FLAGS += -nostdinc <<
977 <<
978 # To gain proper coverage for CONFIG_UBSAN_BOU <<
979 # the kernel uses only C99 flexible arrays for <<
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) + <<
987 837
988 # disable invalid "can't wrap" optimizations f 838 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow !! 839 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
>> 840
>> 841 # clang sets -fmerge-all-constants by default as optimization, but this
>> 842 # is non-conforming behavior for C and in fact breaks the kernel, so we
>> 843 # need to disable it here generally.
>> 844 KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
>> 845
>> 846 # for gcc -fno-merge-all-constants disables everything, but it is fine
>> 847 # to have actual conforming behavior enabled.
>> 848 KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
990 849
991 # Make sure -fstack-check isn't enabled (like 850 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check !! 851 KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
993 852
994 # conserve stack if available 853 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC !! 854 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
996 KBUILD_CFLAGS += -fconserve-stack !! 855
997 endif !! 856 # disallow errors like 'EXPORT_GPL(foo);' with missing header
>> 857 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
>> 858
>> 859 # require functions to have arguments in prototypes, not empty 'int foo()'
>> 860 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
>> 861
>> 862 # Prohibit date/time macros, which would make the build non-deterministic
>> 863 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
>> 864
>> 865 # enforce correct pointer usage
>> 866 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
>> 867
>> 868 # Require designated initializers for all marked structures
>> 869 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
998 870
999 # change __FILE__ to the relative path from th 871 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 872 KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001 873
1002 # include additional Makefiles when needed !! 874 # use the deterministic mode of AR if available
1003 include-y := scripts/Ma !! 875 KBUILD_ARFLAGS := $(call ar-option,D)
1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma <<
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma <<
1006 include-$(CONFIG_KASAN) += scripts/Ma <<
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 <<
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS <<
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) <<
1022 KBUILD_AFLAGS += $(KAFLAGS) <<
1023 KBUILD_CFLAGS += $(KCFLAGS) <<
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) <<
1025 876
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 !! 877 include scripts/Makefile.kasan
1027 LDFLAGS_vmlinux += --build-id=sha1 !! 878 include scripts/Makefile.extrawarn
>> 879 include scripts/Makefile.ubsan
>> 880
>> 881 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
>> 882 # last assignments
>> 883 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
>> 884 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
>> 885 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
>> 886
>> 887 # Use --build-id when available.
>> 888 LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
>> 889 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
>> 890 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
1028 891
1029 KBUILD_LDFLAGS += -z noexecstack 892 KBUILD_LDFLAGS += -z noexecstack
1030 ifeq ($(CONFIG_LD_IS_BFD),y) <<
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn 893 KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
1032 endif <<
1033 894
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 895 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X !! 896 LDFLAGS_vmlinux += $(call ld-option, -X,)
1036 endif 897 endif
1037 898
1038 ifeq ($(CONFIG_RELR),y) <<
1039 # ld.lld before 15 did not support -z pack-re <<
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 <<
1048 <<
1049 # Align the bit size of userspace programs wi <<
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta <<
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta <<
1052 <<
1053 # make the checker run with the right archite <<
1054 CHECKFLAGS += --arch=$(ARCH) <<
1055 <<
1056 # insure the checker run with the right endia 899 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 900 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058 901
1059 # the checker needs the correct machine size 902 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 903 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061 904
1062 # Default kernel image to build when no speci 905 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 906 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 907 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 908 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 909 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 910 export KBUILD_IMAGE ?= vmlinux
1068 911
1069 # 912 #
1070 # INSTALL_PATH specifies where to place the u 913 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 914 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 915 export INSTALL_PATH ?= /boot
1073 916
1074 # 917 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 918 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 919 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 920 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 921 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 922 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 923
1081 # 924 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 925 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 926 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 927 # makefile but the argument can be passed to make if needed.
1085 # 928 #
1086 929
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 930 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 931 export MODLIB
1089 932
1090 PHONY += prepare0 !! 933 #
>> 934 # INSTALL_MOD_STRIP, if defined, will cause modules to be
>> 935 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
>> 936 # the default option --strip-debug will be used. Otherwise,
>> 937 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
>> 938
>> 939 ifdef INSTALL_MOD_STRIP
>> 940 ifeq ($(INSTALL_MOD_STRIP),1)
>> 941 mod_strip_cmd = $(STRIP) --strip-debug
>> 942 else
>> 943 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
>> 944 endif # INSTALL_MOD_STRIP=1
>> 945 else
>> 946 mod_strip_cmd = true
>> 947 endif # INSTALL_MOD_STRIP
>> 948 export mod_strip_cmd
>> 949
>> 950 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
>> 951 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
>> 952 # or CONFIG_MODULE_COMPRESS_XZ.
>> 953
>> 954 mod_compress_cmd = true
>> 955 ifdef CONFIG_MODULE_COMPRESS
>> 956 ifdef CONFIG_MODULE_COMPRESS_GZIP
>> 957 mod_compress_cmd = gzip -n -f
>> 958 endif # CONFIG_MODULE_COMPRESS_GZIP
>> 959 ifdef CONFIG_MODULE_COMPRESS_XZ
>> 960 mod_compress_cmd = xz -f
>> 961 endif # CONFIG_MODULE_COMPRESS_XZ
>> 962 endif # CONFIG_MODULE_COMPRESS
>> 963 export mod_compress_cmd
>> 964
>> 965 # Select initial ramdisk compression format, default is gzip(1).
>> 966 # This shall be used by the dracut(8) tool while creating an initramfs image.
>> 967 #
>> 968 INITRD_COMPRESS-y := gzip
>> 969 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
>> 970 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
>> 971 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
>> 972 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
>> 973 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
>> 974 # do not export INITRD_COMPRESS, since we didn't actually
>> 975 # choose a sane default compression above.
>> 976 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1091 977
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 978 ifdef CONFIG_MODULE_SIG_ALL
1093 export MODORDER := $(extmod_prefix)modules.or !! 979 $(eval $(call config_filename,MODULE_SIG_KEY))
1094 export MODULES_NSDEPS := $(extmod_prefix)modu <<
1095 980
1096 ifeq ($(KBUILD_EXTMOD),) !! 981 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
>> 982 else
>> 983 mod_sign_cmd = true
>> 984 endif
>> 985 export mod_sign_cmd
1097 986
1098 build-dir := . !! 987 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 988
1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 989 ifdef CONFIG_STACK_VALIDATION
1109 ifdef CONFIG_MODULES !! 990 has_libelf := $(call try-run,\
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a !! 991 echo "int main() {}" | $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib !! 992 ifeq ($(has_libelf),1)
1112 else !! 993 objtool_target := tools/objtool FORCE
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 994 else
>> 995 SKIP_STACK_VALIDATION := 1
>> 996 export SKIP_STACK_VALIDATION
>> 997 endif
1114 endif 998 endif
1115 999
1116 export KBUILD_VMLINUX_LIBS !! 1000 PHONY += prepare0
1117 export KBUILD_LDS := arch/$(SRCARCH) !! 1001
>> 1002 ifeq ($(KBUILD_EXTMOD),)
>> 1003 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1118 1004
>> 1005 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
>> 1006 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 1007 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
>> 1008
>> 1009 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
>> 1010 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
>> 1011
>> 1012 init-y := $(patsubst %/, %/built-in.a, $(init-y))
>> 1013 core-y := $(patsubst %/, %/built-in.a, $(core-y))
>> 1014 drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
>> 1015 net-y := $(patsubst %/, %/built-in.a, $(net-y))
>> 1016 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
>> 1017 libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
>> 1018 virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
>> 1019
>> 1020 # Externally visible symbols (used by link-vmlinux.sh)
>> 1021 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
>> 1022 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
>> 1023 export KBUILD_VMLINUX_LIBS := $(libs-y1)
>> 1024 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 1025 export LDFLAGS_vmlinux
>> 1026 # used by scripts/package/Makefile
>> 1027 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
>> 1028
>> 1029 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
>> 1030
>> 1031 # Recurse until adjust_autoksyms.sh is satisfied
>> 1032 PHONY += autoksyms_recursive
>> 1033 autoksyms_recursive: $(vmlinux-deps)
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1034 ifdef CONFIG_TRIM_UNUSED_KSYMS
>> 1035 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
>> 1036 "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
>> 1037 endif
>> 1038
1120 # For the kernel to actually contain only the 1039 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi 1040 # we have to build modules as well to determine what those symbols are.
1122 KBUILD_MODULES := 1 !! 1041 # (this can be evaluated only once include/config/auto.conf has been included)
>> 1042 ifdef CONFIG_TRIM_UNUSED_KSYMS
>> 1043 KBUILD_MODULES := 1
1123 endif 1044 endif
1124 1045
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1046 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 1047
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1048 $(autoksyms_h):
1141 @: !! 1049 $(Q)mkdir -p $(dir $@)
>> 1050 $(Q)touch $@
>> 1051
>> 1052 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
>> 1053
>> 1054 # Final link of vmlinux with optional arch pass after final link
>> 1055 cmd_link-vmlinux = \
>> 1056 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \
>> 1057 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
>> 1058
>> 1059 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
>> 1060 ifdef CONFIG_HEADERS_CHECK
>> 1061 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
>> 1062 endif
>> 1063 ifdef CONFIG_GDB_SCRIPTS
>> 1064 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
>> 1065 endif
>> 1066 +$(call if_changed,link-vmlinux)
1142 1067
1143 PHONY += vmlinux !! 1068 # Build samples along the rest of the kernel. This needs headers_install.
1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1069 ifdef CONFIG_SAMPLES
1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1070 vmlinux-dirs += samples
1146 # unrelated; the decompressors just happen to !! 1071 samples: headers_install
1147 # arch/*/boot/compressed/vmlinux. !! 1072 endif
1148 # Export LDFLAGS_vmlinux only to scripts/Make <<
1149 # <<
1150 # _LDFLAGS_vmlinux is a workaround for the 'p <<
1151 # https://savannah.gnu.org/bugs/?61463 <<
1152 # For Make > 4.4, the following simple code w <<
1153 # vmlinux: private export LDFLAGS_vmlinux := <<
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG <<
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ <<
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost <<
1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1158 1073
1159 # The actual objects are generated when desce 1074 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1075 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1076 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1162 1077
1163 ifeq ($(origin KERNELRELEASE),file) !! 1078 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1079 # Preset locale variables to speed up the build process. Limit locale
1165 else !! 1080 # tweaks to this spot to avoid wrong language settings when running
1166 filechk_kernel.release = echo $(KERNELRELEASE !! 1081 # make menuconfig etc.
1167 endif !! 1082 # Error messages still appears in the original language
>> 1083
>> 1084 PHONY += $(vmlinux-dirs)
>> 1085 $(vmlinux-dirs): prepare scripts
>> 1086 $(Q)$(MAKE) $(build)=$@ need-builtin=1
>> 1087
>> 1088 define filechk_kernel.release
>> 1089 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
>> 1090 endef
1168 1091
1169 # Store (new) KERNELRELEASE string in include 1092 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE !! 1093 include/config/kernel.release: $(srctree)/Makefile FORCE
1171 $(call filechk,kernel.release) 1094 $(call filechk,kernel.release)
1172 1095
1173 # Additional helpers built in scripts/ 1096 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr 1097 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel 1098 # in parallel
1176 PHONY += scripts 1099 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc !! 1100 scripts: scripts_basic asm-generic gcc-plugins $(autoksyms_h)
1178 $(Q)$(MAKE) $(build)=$(@) 1101 $(Q)$(MAKE) $(build)=$(@)
1179 1102
1180 # Things we need to do before we recursively 1103 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1104 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1105 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1106 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1107 # version.h and scripts_basic is processed / created.
1185 1108
1186 PHONY += prepare archprepare !! 1109 PHONY += prepare archprepare prepare1 prepare2 prepare3
1187 1110
1188 archprepare: outputmakefile archheaders archs !! 1111 # prepare3 is used to check if we are building in a separate output directory,
1189 asm-generic $(version_h) include/gene !! 1112 # and if so do:
1190 include/generated/compile.h include/g !! 1113 # 1) Check that make has not been executed in the kernel src $(srctree)
1191 !! 1114 prepare3: include/config/kernel.release
1192 prepare0: archprepare !! 1115 ifneq ($(KBUILD_SRC),)
1193 $(Q)$(MAKE) $(build)=scripts/mod !! 1116 @$(kecho) ' Using $(srctree) as source for kernel'
1194 $(Q)$(MAKE) $(build)=. prepare !! 1117 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
>> 1118 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
>> 1119 echo >&2 " in the '$(srctree)' directory.";\
>> 1120 /bin/false; \
>> 1121 fi;
>> 1122 endif
>> 1123
>> 1124 # prepare2 creates a makefile if using a separate output directory.
>> 1125 # From this point forward, .config has been reprocessed, so any rules
>> 1126 # that need to depend on updated CONFIG_* values can be checked here.
>> 1127 prepare2: prepare3 outputmakefile asm-generic
1195 1128
1196 # All the preparing.. !! 1129 prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h
1197 prepare: prepare0 !! 1130 $(cmd_crmodverdir)
1198 ifdef CONFIG_RUST <<
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1200 $(Q)$(MAKE) $(build)=rust <<
1201 endif <<
1202 1131
1203 PHONY += remove-stale-files !! 1132 archprepare: archheaders archscripts prepare1 scripts_basic
1204 remove-stale-files: <<
1205 $(Q)$(srctree)/scripts/remove-stale-f <<
1206 1133
1207 # Support for using generic headers in asm-ge !! 1134 prepare0: archprepare gcc-plugins
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1135 $(Q)$(MAKE) $(build)=.
1209 1136
>> 1137 # All the preparing..
>> 1138 prepare: prepare0 prepare-objtool
>> 1139
>> 1140 # Support for using generic headers in asm-generic
1210 PHONY += asm-generic uapi-asm-generic 1141 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic 1142 asm-generic: uapi-asm-generic
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1143 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1213 generic=include/asm-generic !! 1144 src=asm obj=arch/$(SRCARCH)/include/generated/asm
1214 uapi-asm-generic: 1145 uapi-asm-generic:
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1146 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1216 generic=include/uapi/asm-generic !! 1147 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
>> 1148
>> 1149 PHONY += prepare-objtool
>> 1150 prepare-objtool: $(objtool_target)
>> 1151 ifeq ($(SKIP_STACK_VALIDATION),1)
>> 1152 ifdef CONFIG_UNWINDER_ORC
>> 1153 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1154 @false
>> 1155 else
>> 1156 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1157 endif
>> 1158 endif
1217 1159
1218 # Generate some files 1160 # Generate some files
1219 # ------------------------------------------- 1161 # ---------------------------------------------------------------------------
1220 1162
1221 # KERNELRELEASE can change from a few differe 1163 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1164 # needs to be updated, so this check is forced on all builds
1223 1165
1224 uts_len := 64 1166 uts_len := 64
1225 define filechk_utsrelease.h 1167 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1168 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1169 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1170 exit 1; \
1229 fi; 1171 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR !! 1172 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1231 endef 1173 endef
1232 1174
1233 define filechk_version.h 1175 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then !! 1176 (echo \#define LINUX_VERSION_CODE $(shell \
1235 echo \#define LINUX_VERSION_C !! 1177 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 255); \
1236 expr $(VERSION) \* 65536 + $( !! 1178 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 1179 endef
1247 1180
1248 $(version_h): private PATCHLEVEL := $(or $(PA <<
1249 $(version_h): private SUBLEVEL := $(or $(SUBL <<
1250 $(version_h): FORCE 1181 $(version_h): FORCE
1251 $(call filechk,version.h) 1182 $(call filechk,version.h)
>> 1183 $(Q)rm -f $(old_version_h)
1252 1184
1253 include/generated/utsrelease.h: include/confi 1185 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1186 $(call filechk,utsrelease.h)
1255 1187
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 1188 PHONY += headerdep
1263 headerdep: 1189 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1190 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1191 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1192
1267 # ------------------------------------------- 1193 # ---------------------------------------------------------------------------
1268 # Kernel headers 1194 # Kernel headers
1269 1195
1270 #Default location for installed headers 1196 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1197 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1198
1273 quiet_cmd_headers_install = INSTALL $(INSTALL !! 1199 # If we do an all arch process set dst to include/arch-$(SRCARCH)
1274 cmd_headers_install = \ !! 1200 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
1275 mkdir -p $(INSTALL_HDR_PATH); \ <<
1276 rsync -mrl --include='*/' --include=' <<
1277 usr/include $(INSTALL_HDR_PATH) <<
1278 1201
1279 PHONY += headers_install !! 1202 PHONY += archheaders
1280 headers_install: headers !! 1203 archheaders:
1281 $(call cmd,headers_install) <<
1282 <<
1283 PHONY += archheaders archscripts <<
1284 1204
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he !! 1205 PHONY += archscripts
>> 1206 archscripts:
1286 1207
1287 PHONY += headers !! 1208 PHONY += __headers
1288 headers: $(version_h) scripts_unifdef uapi-as !! 1209 __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
1289 $(if $(filter um, $(SRCARCH)), $(erro !! 1210 $(Q)$(MAKE) $(build)=scripts build_unifdef
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi !! 1211
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC !! 1212 PHONY += headers_install_all
1292 !! 1213 headers_install_all:
1293 ifdef CONFIG_HEADERS_INSTALL !! 1214 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1294 prepare: headers <<
1295 endif <<
1296 <<
1297 PHONY += scripts_unifdef <<
1298 scripts_unifdef: scripts_basic <<
1299 $(Q)$(MAKE) $(build)=scripts scripts/ <<
1300 <<
1301 # ------------------------------------------- <<
1302 # Install <<
1303 1215
1304 # Many distributions have the custom install !! 1216 PHONY += headers_install
1305 # If DKMS is installed, 'make install' will e !! 1217 headers_install: __headers
1306 # to this Makefile to build and install exter !! 1218 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1307 # Cancel sub_make_done so that options such a !! 1219 $(error Headers not exportable for the $(SRCARCH) architecture))
1308 !! 1220 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) !! 1221 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
1310 cmd_install = unset sub_make_done; $(sr !! 1222
1311 !! 1223 PHONY += headers_check_all
1312 # ------------------------------------------- !! 1224 headers_check_all: headers_install_all
1313 # vDSO install !! 1225 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1314 !! 1226
1315 PHONY += vdso_install !! 1227 PHONY += headers_check
1316 vdso_install: export INSTALL_FILES = $(vdso-i !! 1228 headers_check: headers_install
1317 vdso_install: !! 1229 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1230 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
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 1231
1363 # ------------------------------------------- 1232 # ---------------------------------------------------------------------------
1364 # Kernel selftest 1233 # Kernel selftest
1365 1234
1366 PHONY += kselftest 1235 PHONY += kselftest
1367 kselftest: headers !! 1236 kselftest:
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1237 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369 1238
1370 kselftest-%: headers FORCE !! 1239 PHONY += kselftest-clean
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1240 kselftest-clean:
>> 1241 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1372 1242
1373 PHONY += kselftest-merge 1243 PHONY += kselftest-merge
1374 kselftest-merge: 1244 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1245 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1246 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1377 xargs $(srctree)/scripts/kcon !! 1247 -m $(objtree)/.config \
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol !! 1248 $(srctree)/tools/testing/selftests/*/config
1379 !! 1249 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1380 # ------------------------------------------- <<
1381 # Devicetree files <<
1382 <<
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ <<
1384 dtstree := arch/$(SRCARCH)/boot/dts <<
1385 endif <<
1386 <<
1387 ifneq ($(dtstree),) <<
1388 <<
1389 %.dtb: dtbs_prepare <<
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts <<
1391 <<
1392 %.dtbo: dtbs_prepare <<
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts <<
1394 <<
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ <<
1396 dtbs: dtbs_prepare <<
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- <<
1398 <<
1399 # include/config/kernel.release is actually n <<
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) <<
1401 # dtbs_install depend on it as dtbs_install m <<
1402 dtbs_prepare: include/config/kernel.release s <<
1403 <<
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), <<
1405 export CHECK_DTBS=y <<
1406 endif <<
1407 <<
1408 ifneq ($(CHECK_DTBS),) <<
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif <<
1411 <<
1412 dtbs_check: dtbs <<
1413 <<
1414 dtbs_install: <<
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1416 <<
1417 ifdef CONFIG_OF_EARLY_FLATTREE <<
1418 all: dtbs <<
1419 endif <<
1420 <<
1421 endif <<
1422 <<
1423 PHONY += scripts_dtc <<
1424 scripts_dtc: scripts_basic <<
1425 $(Q)$(MAKE) $(build)=scripts/dtc <<
1426 <<
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO <<
1428 export CHECK_DTBS=y <<
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 <<
1437 <<
1438 PHONY += dt_compatible_check <<
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 1250
1442 # ------------------------------------------- 1251 # ---------------------------------------------------------------------------
1443 # Modules 1252 # Modules
1444 1253
1445 ifdef CONFIG_MODULES 1254 ifdef CONFIG_MODULES
1446 1255
1447 # By default, build modules as well 1256 # By default, build modules as well
1448 1257
1449 all: modules 1258 all: modules
1450 1259
1451 # When we're building modules with modversion 1260 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as 1261 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo 1262 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS 1263 ifdef CONFIG_MODVERSIONS
1455 KBUILD_BUILTIN := 1 1264 KBUILD_BUILTIN := 1
1456 endif 1265 endif
1457 1266
1458 # Build modules 1267 # Build modules
1459 # 1268 #
>> 1269 # A module can be listed more than once in obj-m resulting in
>> 1270 # duplicate lines in modules.order files. Those are removed
>> 1271 # using awk while concatenating to the final file.
>> 1272
>> 1273 PHONY += modules
>> 1274 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
>> 1275 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
>> 1276 @$(kecho) ' Building modules, stage 2.';
>> 1277 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1460 1278
1461 # *.ko are usually independent of vmlinux, bu !! 1279 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1462 # is an exception. !! 1280 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES !! 1281
1464 KBUILD_BUILTIN := 1 !! 1282 %/modules.builtin: include/config/auto.conf include/config/tristate.conf
1465 modules: vmlinux !! 1283 $(Q)$(MAKE) $(modbuiltin)=$*
1466 endif <<
1467 1284
1468 modules: modules_prepare <<
1469 1285
1470 # Target to prepare building external modules 1286 # Target to prepare building external modules
1471 modules_prepare: prepare !! 1287 PHONY += modules_prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ !! 1288 modules_prepare: prepare scripts
>> 1289
>> 1290 # Target to install modules
>> 1291 PHONY += modules_install
>> 1292 modules_install: _modinst_ _modinst_post
>> 1293
>> 1294 PHONY += _modinst_
>> 1295 _modinst_:
>> 1296 @rm -rf $(MODLIB)/kernel
>> 1297 @rm -f $(MODLIB)/source
>> 1298 @mkdir -p $(MODLIB)/kernel
>> 1299 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1300 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1301 rm -f $(MODLIB)/build ; \
>> 1302 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1303 fi
>> 1304 @cp -f $(objtree)/modules.order $(MODLIB)/
>> 1305 @cp -f $(objtree)/modules.builtin $(MODLIB)/
>> 1306 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1307
>> 1308 # This depmod is only for convenience to give the initial
>> 1309 # boot a modules.dep even before / is mounted read-write. However the
>> 1310 # boot script depmod is the master version.
>> 1311 PHONY += _modinst_post
>> 1312 _modinst_post: _modinst_
>> 1313 $(call cmd,depmod)
>> 1314
>> 1315 ifeq ($(CONFIG_MODULE_SIG), y)
>> 1316 PHONY += modules_sign
>> 1317 modules_sign:
>> 1318 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
>> 1319 endif
>> 1320
>> 1321 else # CONFIG_MODULES
>> 1322
>> 1323 # Modules not configured
>> 1324 # ---------------------------------------------------------------------------
>> 1325
>> 1326 PHONY += modules modules_install
>> 1327 modules modules_install:
>> 1328 @echo >&2
>> 1329 @echo >&2 "The present kernel configuration has modules disabled."
>> 1330 @echo >&2 "Type 'make config' and enable loadable module support."
>> 1331 @echo >&2 "Then build a kernel with module support enabled."
>> 1332 @echo >&2
>> 1333 @exit 1
1473 1334
1474 endif # CONFIG_MODULES 1335 endif # CONFIG_MODULES
1475 1336
1476 ### 1337 ###
1477 # Cleaning is done on three levels. 1338 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1339 # make clean Delete most generated files
1479 # Leave enough to build extern 1340 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1341 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1342 # make distclean Remove editor backup files, patch leftover files and the like
1482 1343
1483 # Directories & files removed with 'make clea 1344 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1345 CLEAN_DIRS += $(MODVERDIR) include/ksym
1485 modules.builtin modules.builti <<
1486 compile_commands.json rust/tes <<
1487 rust-project.json .vmlinux.obj <<
1488 1346
1489 # Directories & files removed with 'make mrpr 1347 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene !! 1348 MRPROPER_DIRS += include/config usr/include include/generated \
1491 arch/$(SRCARCH)/include/gen !! 1349 arch/*/include/generated .tmp_objdiff
1492 debian snap tar-install PKG !! 1350 MRPROPER_FILES += .config .config.old .version \
1493 .config .config.old .versio !! 1351 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1494 Module.symvers \ !! 1352 signing_key.pem signing_key.priv signing_key.x509 \
1495 certs/signing_key.pem \ !! 1353 x509.genkey extra_certificates signing_key.x509.keyid \
1496 certs/x509.genkey \ !! 1354 signing_key.x509.signer vmlinux-gdb.py
1497 vmlinux-gdb.py \ <<
1498 rpmbuild \ <<
1499 rust/libmacros.so <<
1500 1355
1501 # clean - Delete most, but leave enough to bu 1356 # clean - Delete most, but leave enough to build external modules
1502 # 1357 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1358 clean: rm-dirs := $(CLEAN_DIRS)
>> 1359 clean: rm-files := $(CLEAN_FILES)
>> 1360 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1504 1361
1505 PHONY += archclean vmlinuxclean !! 1362 PHONY += $(clean-dirs) clean archclean vmlinuxclean
>> 1363 $(clean-dirs):
>> 1364 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1506 1365
1507 vmlinuxclean: 1366 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1367 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1368 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1369
1511 clean: archclean vmlinuxclean resolve_btfids_ !! 1370 clean: archclean vmlinuxclean
1512 1371
1513 # mrproper - Delete all generated files, incl 1372 # mrproper - Delete all generated files, including .config
1514 # 1373 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1374 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
>> 1375 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs := $(addprefix _mrproper_, 1376 mrproper-dirs := $(addprefix _mrproper_,scripts)
1517 1377
1518 PHONY += $(mrproper-dirs) mrproper !! 1378 PHONY += $(mrproper-dirs) mrproper archmrproper
1519 $(mrproper-dirs): 1379 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1380 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1381
1522 mrproper: clean $(mrproper-dirs) !! 1382 mrproper: clean archmrproper $(mrproper-dirs)
>> 1383 $(call cmd,rmdirs)
1523 $(call cmd,rmfiles) 1384 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 1385
1528 # distclean 1386 # distclean
1529 # 1387 #
1530 PHONY += distclean 1388 PHONY += distclean
1531 1389
1532 distclean: mrproper 1390 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ !! 1391 @find $(srctree) $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1392 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* 1393 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536 -o -name 'core' -o -name tags !! 1394 -o -name 'core' \) \
1537 -o -name GPATH -o -name GRTAG <<
1538 -type f -print | xargs rm -f 1395 -type f -print | xargs rm -f
1539 1396
1540 1397
1541 # Packaging of the kernel to various formats 1398 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1399 # ---------------------------------------------------------------------------
>> 1400 package-dir := scripts/package
1543 1401
1544 %src-pkg: FORCE 1402 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1403 $(Q)$(MAKE) $(build)=$(package-dir) $@
1546 %pkg: include/config/kernel.release FORCE 1404 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1405 $(Q)$(MAKE) $(build)=$(package-dir) $@
>> 1406
1548 1407
1549 # Brief documentation of the typical targets 1408 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1409 # ---------------------------------------------------------------------------
1551 1410
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1411 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1412 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1413 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1414 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1415
1557 PHONY += help 1416 PHONY += help
1558 help: 1417 help:
1559 @echo 'Cleaning targets:' 1418 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1419 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1420 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1421 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1422 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1423 @echo ''
>> 1424 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1425 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1426 @echo ''
1567 @echo 'Other generic targets:' 1427 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1428 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1429 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1430 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1431 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 1432 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1433 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1434 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1435 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1436 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1437 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1438 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1439 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1440 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1441 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1442 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1443 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1444 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1445 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1446 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1447 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1448 echo ''
1590 @echo 'Static analysers:' 1449 @echo 'Static analysers:'
1591 @echo ' checkstack - Generate !! 1450 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st !! 1451 @echo ' namespacecheck - Name space analysis on compiled kernel'
1593 @echo ' versioncheck - Sanity ch 1452 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1453 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1454 @echo ' export_report - List the usages of all exported symbols'
>> 1455 @echo ' headers_check - Sanity check on exported headers'
1596 @echo ' headerdep - Detect in 1456 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit 1457 @echo ' coccicheck - Check with Coccinelle'
1598 @echo ' clang-analyzer - Check wit <<
1599 @echo ' clang-tidy - Check wit <<
1600 @echo '' <<
1601 @echo 'Tools:' <<
1602 @echo ' nsdeps - Generate <<
1603 @echo '' 1458 @echo ''
1604 @echo 'Kernel selftest:' 1459 @echo 'Kernel selftest:'
1605 @echo ' kselftest - Build a !! 1460 @echo ' kselftest - Build and run kernel selftest (run as root)'
1606 @echo ' Build, !! 1461 @echo ' Build, install, and boot kernel before'
1607 @echo ' running !! 1462 @echo ' running kselftest on it'
1608 @echo ' Run as !! 1463 @echo ' kselftest-clean - Remove all generated kselftest files'
1609 @echo ' kselftest-all - Build k !! 1464 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
1610 @echo ' kselftest-install - Build a !! 1465 @echo ' .config.'
1611 @echo ' kselftest-clean - Remove <<
1612 @echo ' kselftest-merge - Merge a <<
1613 @echo ' kselfte <<
1614 @echo '' 1466 @echo ''
1615 @echo 'Rust targets:' <<
1616 @echo ' rustavailable - Checks wh <<
1617 @echo ' available <<
1618 @echo ' rustfmt - Reformat <<
1619 @echo ' rustfmtcheck - Checks if <<
1620 @echo ' is format <<
1621 @echo ' rustdoc - Generate <<
1622 @echo ' (requires <<
1623 @echo ' rusttest - Runs the <<
1624 @echo ' (requires <<
1625 @echo ' rust-analyzer - Generate <<
1626 @echo ' (requires <<
1627 @echo ' dir/file.[os] - Build spe <<
1628 @echo ' dir/file.rsi - Build mac <<
1629 @echo ' Run with <<
1630 @echo ' The outpu <<
1631 @echo ' dir/file.ll - Build the <<
1632 @echo '' <<
1633 @$(if $(dtstree), \ <<
1634 echo 'Devicetree:'; \ <<
1635 echo '* dtbs - <<
1636 echo ' dtbs_install - <<
1637 echo ' dt_binding_check - <<
1638 echo ' dt_binding_schema - <<
1639 echo ' dtbs_check - <<
1640 echo '') <<
1641 <<
1642 @echo 'Userspace tools targets:' 1467 @echo 'Userspace tools targets:'
1643 @echo ' use "make tools/help"' 1468 @echo ' use "make tools/help"'
1644 @echo ' or "cd tools; make help"' 1469 @echo ' or "cd tools; make help"'
1645 @echo '' 1470 @echo ''
1646 @echo 'Kernel packaging:' 1471 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi !! 1472 @$(MAKE) $(build)=$(package-dir) help
1648 @echo '' 1473 @echo ''
1649 @echo 'Documentation targets:' 1474 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ 1475 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651 @echo '' 1476 @echo ''
1652 @echo 'Architecture-specific targets !! 1477 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ !! 1478 @$(if $(archhelp),$(archhelp),\
1654 echo ' No architecture-speci !! 1479 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1480 @echo ''
1656 @$(if $(boards), \ 1481 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1482 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % !! 1483 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1484 echo '')
1660 @$(if $(board-dirs), \ 1485 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1486 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1487 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1488 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1489 echo '')
1665 1490
1666 @echo ' make V=n [targets] 1: ver !! 1491 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667 @echo ' 2: giv !! 1492 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 1493 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check !! 1494 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1671 @echo ' (spars <<
1672 @echo ' make C=2 [targets] Force 1495 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1496 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1497 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1498 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1499 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1500 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a <<
1680 @echo ' Multiple leve 1501 @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 '' 1502 @echo ''
1686 @echo 'Execute "make" or "make all" 1503 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1504 @echo 'For further info see the ./README file'
1688 1505
1689 1506
1690 help-board-dirs := $(addprefix help-,$(board- 1507 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1508
1692 help-boards: $(help-board-dirs) 1509 help-boards: $(help-board-dirs)
1693 1510
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1511 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1512
1696 $(help-board-dirs): help-%: 1513 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1514 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1515 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1516 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1517 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1518 echo '')
1702 1519
1703 1520
1704 # Documentation targets 1521 # Documentation targets
1705 # ------------------------------------------- 1522 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1523 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707 linkcheckdocs dochelp refcheck !! 1524 linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS) 1525 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): !! 1526 $(DOC_TARGETS): scripts_basic FORCE
1710 $(Q)$(MAKE) $(build)=Documentation $@ 1527 $(Q)$(MAKE) $(build)=Documentation $@
1711 1528
1712 <<
1713 # Rust targets <<
1714 # ------------------------------------------- <<
1715 <<
1716 # "Is Rust available?" target <<
1717 PHONY += rustavailable <<
1718 rustavailable: <<
1719 +$(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 <<
1754 # ------------------------------------------- <<
1755 <<
1756 PHONY += misc-check <<
1757 misc-check: <<
1758 $(Q)$(srctree)/scripts/misc-check <<
1759 <<
1760 all: misc-check <<
1761 <<
1762 PHONY += scripts_gdb <<
1763 scripts_gdb: prepare0 <<
1764 $(Q)$(MAKE) $(build)=scripts/gdb <<
1765 $(Q)ln -fsn $(abspath $(srctree)/scri <<
1766 <<
1767 ifdef CONFIG_GDB_SCRIPTS <<
1768 all: scripts_gdb <<
1769 endif <<
1770 <<
1771 else # KBUILD_EXTMOD 1529 else # KBUILD_EXTMOD
1772 1530
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### 1531 ###
1776 # External module support. 1532 # External module support.
1777 # When building external modules the kernel u 1533 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1534 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1535 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands !! 1536 # in the basis kernel ordinary make commands (without M=...) must
>> 1537 # be used.
>> 1538 #
>> 1539 # The following are the only valid targets when building external
>> 1540 # modules.
>> 1541 # make M=dir clean Delete all automatically generated files
>> 1542 # make M=dir modules Make all modules in specified dir
>> 1543 # make M=dir Same as 'make M=dir modules'
>> 1544 # make M=dir modules_install
>> 1545 # Install the modules built in the module directory
>> 1546 # Assumes install directory is already created
1781 1547
1782 # We are always building only modules. !! 1548 # We are always building modules
1783 KBUILD_BUILTIN := <<
1784 KBUILD_MODULES := 1 1549 KBUILD_MODULES := 1
1785 1550
1786 build-dir := $(KBUILD_EXTMOD) !! 1551 PHONY += $(objtree)/Module.symvers
>> 1552 $(objtree)/Module.symvers:
>> 1553 @test -e $(objtree)/Module.symvers || ( \
>> 1554 echo; \
>> 1555 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
>> 1556 echo " is missing; modules will have no dependencies and modversions."; \
>> 1557 echo )
>> 1558
>> 1559 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
>> 1560 PHONY += $(module-dirs) modules
>> 1561 $(module-dirs): prepare $(objtree)/Module.symvers
>> 1562 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1787 1563
1788 compile_commands.json: $(extmod_prefix)compil !! 1564 modules: $(module-dirs)
1789 PHONY += compile_commands.json !! 1565 @$(kecho) ' Building modules, stage 2.';
>> 1566 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1790 1567
1791 clean-dirs := $(KBUILD_EXTMOD) !! 1568 PHONY += modules_install
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1569 modules_install: _emodinst_ _emodinst_post
1793 $(KBUILD_EXTMOD)/compile_commands.jso !! 1570
1794 !! 1571 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1795 PHONY += prepare !! 1572 PHONY += _emodinst_
1796 # now expand this into a simple variable to r !! 1573 _emodinst_:
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1574 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1798 prepare: !! 1575 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1576
1800 echo >&2 "warning: the compil !! 1577 PHONY += _emodinst_post
1801 echo >&2 " The kernel was bu !! 1578 _emodinst_post: _emodinst_
1802 echo >&2 " You are using: !! 1579 $(call cmd,depmod)
1803 fi !! 1580
>> 1581 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
>> 1582
>> 1583 PHONY += $(clean-dirs) clean
>> 1584 $(clean-dirs):
>> 1585 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
>> 1586
>> 1587 clean: rm-dirs := $(MODVERDIR)
>> 1588 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1804 1589
1805 PHONY += help 1590 PHONY += help
1806 help: 1591 help:
1807 @echo ' Building external modules.' 1592 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1593 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1594 @echo ''
1810 @echo ' modules - default t 1595 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1596 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1597 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1598 @echo ''
1815 1599
1816 ifndef CONFIG_MODULES !! 1600 # Dummies...
1817 modules modules_install: __external_modules_e !! 1601 PHONY += prepare scripts
1818 __external_modules_error: !! 1602 prepare:
1819 @echo >&2 '***' !! 1603 $(cmd_crmodverdir)
1820 @echo >&2 '*** The present kernel dis !! 1604 scripts: ;
1821 @echo >&2 '*** You cannot build or in <<
1822 @echo >&2 '***' <<
1823 @false <<
1824 endif <<
1825 <<
1826 endif # KBUILD_EXTMOD 1605 endif # KBUILD_EXTMOD
1827 1606
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 <<
1881 # ------------------------------------------- <<
1882 # To build individual files in subdirectories <<
1883 # <<
1884 # make foo/bar/baz.s <<
1885 # <<
1886 # The supported suffixes for single-target ar <<
1887 # <<
1888 # To build only under specific subdirectories <<
1889 # <<
1890 # make foo/bar/baz/ <<
1891 <<
1892 ifdef single-build <<
1893 <<
1894 # .ko is special because modpost is needed <<
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG <<
1896 single-no-ko := $(filter-out $(single-ko), $( <<
1897 $(foreach x, o mod, $(patsubs <<
1898 <<
1899 $(single-ko): single_modules <<
1900 @: <<
1901 $(single-no-ko): $(build-dir) <<
1902 @: <<
1903 <<
1904 # Remove MODORDER when done because it is not <<
1905 PHONY += single_modules <<
1906 single_modules: $(single-no-ko) modules_prepa <<
1907 $(Q){ $(foreach m, $(single-ko), echo <<
1908 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1) <<
1910 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1911 endif <<
1912 $(Q)rm -f $(MODORDER) <<
1913 <<
1914 single-goals := $(addprefix $(build-dir)/, $( <<
1915 <<
1916 KBUILD_MODULES := 1 <<
1917 <<
1918 endif <<
1919 <<
1920 # Preset locale variables to speed up the bui <<
1921 # tweaks to this spot to avoid wrong language <<
1922 # make menuconfig etc. <<
1923 # Error messages still appears in the origina <<
1924 PHONY += $(build-dir) <<
1925 $(build-dir): prepare <<
1926 $(Q)$(MAKE) $(build)=$@ need-builtin= <<
1927 <<
1928 clean-dirs := $(addprefix _clean_, $(clean-di <<
1929 PHONY += $(clean-dirs) clean <<
1930 $(clean-dirs): <<
1931 $(Q)$(MAKE) $(clean)=$(patsubst _clea <<
1932 <<
1933 clean: $(clean-dirs) 1607 clean: $(clean-dirs)
>> 1608 $(call cmd,rmdirs)
1934 $(call cmd,rmfiles) 1609 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1610 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name !! 1611 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ !! 1612 -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
1938 -o -name '*.dtb' -o -name '*. <<
1939 -o -name '*.dtb.S' -o -name ' <<
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. 1613 -o -name '*.dwo' -o -name '*.lst' \
1942 -o -name '*.su' -o -name '*.m !! 1614 -o -name '*.su' \
1943 -o -name '.*.d' -o -name '.*. 1615 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' 1616 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945 -o -name '*.asn1.[ch]' \ 1617 -o -name '*.asn1.[ch]' \
1946 -o -name '*.symtypes' -o -nam 1618 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1619 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1947 -o -name '*.c.[012]*.*' \ 1620 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 1621 -o -name '*.ll' \
1949 -o -name '*.gcno' \ !! 1622 -o -name '*.gcno' \) -type f -print | xargs rm -f
1950 -o -name '*.*.symversions' \) <<
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 1623
1954 # Generate tags for editors 1624 # Generate tags for editors
1955 # ------------------------------------------- 1625 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 1626 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t !! 1627 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1958 1628
1959 tags TAGS cscope gtags: FORCE 1629 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 1630 $(call cmd,tags)
1961 1631
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1968 $(Q)$(MAKE) $(build)=rust $@ <<
1969 <<
1970 # Script to generate missing namespace depend <<
1971 # ------------------------------------------- <<
1972 <<
1973 PHONY += nsdeps <<
1974 nsdeps: export KBUILD_NSDEPS=1 <<
1975 nsdeps: modules <<
1976 $(Q)$(CONFIG_SHELL) $(srctree)/script <<
1977 <<
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 1632 # Scripts to check various things for consistency
2006 # ------------------------------------------- 1633 # ---------------------------------------------------------------------------
2007 1634
2008 PHONY += includecheck versioncheck coccicheck !! 1635 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2009 1636
2010 includecheck: 1637 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1638 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 1639 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 1640 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 1641
2015 versioncheck: 1642 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1643 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 1644 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 1645 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 1646
2020 coccicheck: 1647 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ !! 1648 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
>> 1649
>> 1650 namespacecheck:
>> 1651 $(PERL) $(srctree)/scripts/namespace.pl
2022 1652
2023 export_report: 1653 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 1654 $(PERL) $(srctree)/scripts/export_report.pl
2025 1655
>> 1656 endif #ifeq ($(config-targets),1)
>> 1657 endif #ifeq ($(mixed-targets),1)
>> 1658
2026 PHONY += checkstack kernelrelease kernelversi 1659 PHONY += checkstack kernelrelease kernelversion image_name
2027 1660
2028 # UML needs a little special treatment here. 1661 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 1662 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 1663 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 1664 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 1665 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 1666 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 1667 else
2035 CHECKSTACK_ARCH := $(ARCH) 1668 CHECKSTACK_ARCH := $(ARCH)
2036 endif 1669 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 1670 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 1671 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 1672 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 1673
2042 kernelrelease: 1674 kernelrelease:
2043 @$(filechk_kernel.release) !! 1675 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044 1676
2045 kernelversion: 1677 kernelversion:
2046 @echo $(KERNELVERSION) 1678 @echo $(KERNELVERSION)
2047 1679
2048 image_name: 1680 image_name:
2049 @echo $(KBUILD_IMAGE) 1681 @echo $(KBUILD_IMAGE)
2050 1682
2051 PHONY += run-command !! 1683 # Clear a bunch of variables before executing the submake
2052 run-command: !! 1684 tools/: FORCE
2053 $(Q)$(KBUILD_RUN_COMMAND) !! 1685 $(Q)mkdir -p $(objtree)/tools
>> 1686 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
>> 1687
>> 1688 tools/%: FORCE
>> 1689 $(Q)mkdir -p $(objtree)/tools
>> 1690 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
>> 1691
>> 1692 # Single targets
>> 1693 # ---------------------------------------------------------------------------
>> 1694 # Single targets are compatible with:
>> 1695 # - build with mixed source and output
>> 1696 # - build with separate output dir 'make O=...'
>> 1697 # - external modules
>> 1698 #
>> 1699 # target-dir => where to store outputfile
>> 1700 # build-dir => directory in kernel source tree to use
>> 1701
>> 1702 ifeq ($(KBUILD_EXTMOD),)
>> 1703 build-dir = $(patsubst %/,%,$(dir $@))
>> 1704 target-dir = $(dir $@)
>> 1705 else
>> 1706 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
>> 1707 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
>> 1708 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
>> 1709 endif
>> 1710
>> 1711 %.s: %.c prepare scripts FORCE
>> 1712 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1713 %.i: %.c prepare scripts FORCE
>> 1714 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1715 %.o: %.c prepare scripts FORCE
>> 1716 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1717 %.lst: %.c prepare scripts FORCE
>> 1718 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1719 %.s: %.S prepare scripts FORCE
>> 1720 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1721 %.o: %.S prepare scripts FORCE
>> 1722 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1723 %.symtypes: %.c prepare scripts FORCE
>> 1724 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1725 %.ll: %.c prepare scripts FORCE
>> 1726 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1727
>> 1728 # Modules
>> 1729 /: prepare scripts FORCE
>> 1730 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1731 $(build)=$(build-dir)
>> 1732 # Make sure the latest headers are built for Documentation
>> 1733 Documentation/ samples/: headers_install
>> 1734 %/: prepare scripts FORCE
>> 1735 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1736 $(build)=$(build-dir)
>> 1737 %.ko: prepare scripts FORCE
>> 1738 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1739 $(build)=$(build-dir) $(@:.ko=.o)
>> 1740 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
>> 1741
>> 1742 # FIXME Should go into a make.lib or something
>> 1743 # ===========================================================================
>> 1744
>> 1745 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
>> 1746 cmd_rmdirs = rm -rf $(rm-dirs)
2054 1747
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1748 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) !! 1749 cmd_rmfiles = rm -f $(rm-files)
>> 1750
>> 1751 # Run depmod only if we have System.map and depmod is executable
>> 1752 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
>> 1753 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1754 $(KERNELRELEASE)
2057 1755
2058 # read saved command lines for existing targe !! 1756 # Create temporary dir for module support files
2059 existing-targets := $(wildcard $(sort $(targe !! 1757 # clean it up only when building all modules
>> 1758 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
>> 1759 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
2060 1760
2061 -include $(foreach f,$(existing-targets),$(di !! 1761 # read all saved command lines
>> 1762
>> 1763 cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
>> 1764
>> 1765 ifneq ($(cmd_files),)
>> 1766 $(cmd_files): ; # Do not try to update included dependency files
>> 1767 include $(cmd_files)
>> 1768 endif
2062 1769
2063 endif # config-build !! 1770 endif # skip-makefile
2064 endif # mixed-build <<
2065 endif # need-sub-make <<
2066 1771
2067 PHONY += FORCE 1772 PHONY += FORCE
2068 FORCE: 1773 FORCE:
2069 1774
2070 # Declare the contents of the PHONY variable 1775 # Declare the contents of the PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 1776 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 1777 .PHONY: $(PHONY)
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