1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 6 !! 2 VERSION = 5
3 PATCHLEVEL = 11 !! 3 PATCHLEVEL = 0
4 SUBLEVEL = 5 !! 4 SUBLEVEL = 21
5 EXTRAVERSION = 5 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 6 NAME = Shy Crocodile
7 7
8 # *DOCUMENTATION* 8 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 10 # More info can be located in ./README
11 # Comments in this file are targeted only to t 11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 12 # expect to learn how to build the kernel reading this file.
13 13
14 ifeq ($(filter output-sync,$(.FEATURES)),) <<
15 $(error GNU Make >= 4.0 is required. Your Make <<
16 endif <<
17 <<
18 $(if $(filter __%, $(MAKECMDGOALS)), \ <<
19 $(error targets prefixed with '__' are <<
20 <<
21 # That's our default target when none is given 14 # That's our default target when none is given on the command line
22 PHONY := __all !! 15 PHONY := _all
23 __all: !! 16 _all:
24 17
25 # We are using a recursive build, so we need t 18 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 19 # to get the ordering right.
27 # 20 #
28 # Most importantly: sub-Makefiles should only 21 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 22 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 23 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ 24 # unavoidable when linking the built-in.a targets which finally
32 # turn into vmlinux), we will call a sub make 25 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 26 # after that we are sure that everything which is in that other dir
34 # is now up to date. 27 # is now up to date.
35 # 28 #
36 # The only cases where we need to modify files 29 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 30 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 31 # descending is started. They are now explicitly listed as the
39 # prepare rule. 32 # prepare rule.
40 33
41 this-makefile := $(lastword $(MAKEFILE_LIST)) <<
42 abs_srctree := $(realpath $(dir $(this-makefil <<
43 abs_objtree := $(CURDIR) <<
44 <<
45 ifneq ($(sub_make_done),1) 34 ifneq ($(sub_make_done),1)
46 35
47 # Do not use make's built-in rules and variabl 36 # Do not use make's built-in rules and variables
48 # (this increases performance and avoids hard- 37 # (this increases performance and avoids hard-to-debug behaviour)
49 MAKEFLAGS += -rR 38 MAKEFLAGS += -rR
50 39
51 # Avoid funny character set dependencies 40 # Avoid funny character set dependencies
52 unexport LC_ALL 41 unexport LC_ALL
53 LC_COLLATE=C 42 LC_COLLATE=C
54 LC_NUMERIC=C 43 LC_NUMERIC=C
55 export LC_COLLATE LC_NUMERIC 44 export LC_COLLATE LC_NUMERIC
56 45
57 # Avoid interference with shell env settings 46 # Avoid interference with shell env settings
58 unexport GREP_OPTIONS 47 unexport GREP_OPTIONS
59 48
60 # Beautify output 49 # Beautify output
61 # -------------------------------------------- 50 # ---------------------------------------------------------------------------
62 # 51 #
63 # Most of build commands in Kbuild start with !! 52 # Normally, we echo the whole command before executing it. By making
64 # "quiet_cmd_*". If defined, the short log is !! 53 # that echo $($(quiet)$(cmd)), we now have the possibility to set
65 # that command is printed by default. !! 54 # $(quiet) to choose other forms of output instead, e.g.
66 # !! 55 #
67 # e.g.) !! 56 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 57 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
69 # cmd_depmod = $(srctree)/scripts/dep !! 58 #
>> 59 # If $(quiet) is empty, the whole command will be printed.
>> 60 # If it is set to "quiet_", only the short version will be printed.
>> 61 # If it is set to "silent_", nothing will be printed at all, since
>> 62 # the variable $(silent_cmd_cc_o_c) doesn't exist.
70 # 63 #
71 # A simple variant is to prefix commands with 64 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 65 # for commands that shall be hidden in non-verbose mode.
73 # 66 #
74 # $(Q)$(MAKE) $(build)=scripts/basic !! 67 # $(Q)ln $@ :<
75 # 68 #
76 # If KBUILD_VERBOSE contains 1, the whole comm !! 69 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
77 # If KBUILD_VERBOSE contains 2, the reason for !! 70 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
78 # 71 #
79 # To put more focus on warnings, be less verbo 72 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 73 # Use 'make V=1' to see the full commands
81 74
82 ifeq ("$(origin V)", "command line") 75 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 76 KBUILD_VERBOSE = $(V)
84 endif 77 endif
>> 78 ifndef KBUILD_VERBOSE
>> 79 KBUILD_VERBOSE = 0
>> 80 endif
85 81
86 quiet = quiet_ !! 82 ifeq ($(KBUILD_VERBOSE),1)
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = 83 quiet =
91 Q = 84 Q =
>> 85 else
>> 86 quiet=quiet_
>> 87 Q = @
92 endif 88 endif
93 89
94 # If the user is running make -s (silent mode) 90 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 91 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS <<
97 quiet=silent_ <<
98 override KBUILD_VERBOSE := <<
99 endif <<
100 <<
101 export quiet Q KBUILD_VERBOSE <<
102 <<
103 # Call a source code checker (by default, "spa <<
104 # C compilation. <<
105 # <<
106 # Use 'make C=1' to enable checking of only re <<
107 # Use 'make C=2' to enable checking of *all* s <<
108 # of whether they are re-compiled or not. <<
109 # <<
110 # See the file "Documentation/dev-tools/sparse <<
111 # including where to get the "sparse" utility. <<
112 <<
113 ifeq ("$(origin C)", "command line") <<
114 KBUILD_CHECKSRC = $(C) <<
115 endif <<
116 ifndef KBUILD_CHECKSRC <<
117 KBUILD_CHECKSRC = 0 <<
118 endif <<
119 <<
120 export KBUILD_CHECKSRC <<
121 92
122 # Enable "clippy" (a linter) as part of the Ru !! 93 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
123 # !! 94 quiet=silent_
124 # Use 'make CLIPPY=1' to enable it. !! 95 tools_silent=s
125 ifeq ("$(origin CLIPPY)", "command line") <<
126 KBUILD_CLIPPY := $(CLIPPY) <<
127 endif <<
128 <<
129 export KBUILD_CLIPPY <<
130 <<
131 # Use make M=dir or set the environment variab <<
132 # directory of external module to build. Setti <<
133 ifeq ("$(origin M)", "command line") <<
134 KBUILD_EXTMOD := $(M) <<
135 endif <<
136 <<
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ <<
138 $(error building multiple external mod <<
139 <<
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI <<
141 $(error module directory path cannot c <<
142 <<
143 # Remove trailing slashes <<
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) <<
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM <<
146 endif <<
147 <<
148 export KBUILD_EXTMOD <<
149 <<
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif 96 endif
156 97
157 export KBUILD_EXTRA_WARN !! 98 export quiet Q KBUILD_VERBOSE
158 99
159 # Kbuild will save output files in the current !! 100 # kbuild supports saving output files in a separate directory.
160 # This does not need to match to the root of t !! 101 # To locate output files in a separate directory two syntaxes are supported.
161 # !! 102 # In both cases the working directory must be the root of the kernel src.
162 # For example, you can do this: <<
163 # <<
164 # cd /dir/to/store/output/files; make -f /dir <<
165 # <<
166 # If you want to save output files in a differ <<
167 # two syntaxes to specify it. <<
168 # <<
169 # 1) O= 103 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 104 # Use "make O=dir/to/store/output/files/"
171 # 105 #
172 # 2) Set KBUILD_OUTPUT 106 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t !! 107 # Set the environment variable KBUILD_OUTPUT to point to the directory
174 # export KBUILD_OUTPUT=dir/to/store/output/fil !! 108 # where the output files shall be placed.
>> 109 # export KBUILD_OUTPUT=dir/to/store/output/files/
>> 110 # make
175 # 111 #
176 # The O= assignment takes precedence over the 112 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 113 # variable.
178 114
179 # Do we want to change the working directory? !! 115 # KBUILD_SRC is not intended to be used by the regular user (for now),
>> 116 # it is set on invocation of make with KBUILD_OUTPUT or O= specified.
>> 117
>> 118 # OK, Make called in directory where kernel src resides
>> 119 # Do we want to locate output files in a separate directory?
180 ifeq ("$(origin O)", "command line") 120 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 121 KBUILD_OUTPUT := $(O)
182 endif 122 endif
183 123
184 ifneq ($(KBUILD_OUTPUT),) !! 124 # Cancel implicit rules on top Makefile
185 # $(realpath ...) gets empty if the path does !! 125 $(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 ($(KBUILD_OUTPUT),) <<
191 126
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 127 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
193 $(error source directory cannot contain spaces !! 128 $(error main directory cannot contain spaces nor colons)
194 endif 129 endif
195 130
196 export sub_make_done := 1 !! 131 ifneq ($(KBUILD_OUTPUT),)
197 !! 132 # check that the output directory actually exists
198 endif # sub_make_done !! 133 saved-output := $(KBUILD_OUTPUT)
>> 134 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
>> 135 && pwd)
>> 136 $(if $(KBUILD_OUTPUT),, \
>> 137 $(error failed to create output directory "$(saved-output)"))
>> 138
>> 139 # Look for make include files relative to root of kernel src
>> 140 #
>> 141 # This does not become effective immediately because MAKEFLAGS is re-parsed
>> 142 # once after the Makefile is read. It is OK since we are going to invoke
>> 143 # 'sub-make' below.
>> 144 MAKEFLAGS += --include-dir=$(CURDIR)
199 145
200 ifeq ($(abs_objtree),$(CURDIR)) <<
201 # Suppress "Entering directory ..." if we are <<
202 no-print-directory := --no-print-directory <<
203 else <<
204 # Recursion to show "Entering directory ..." <<
205 need-sub-make := 1 146 need-sub-make := 1
206 endif !! 147 else
>> 148
>> 149 # Do not print "Entering directory ..." at all for in-tree build.
>> 150 MAKEFLAGS += --no-print-directory
>> 151
>> 152 endif # ifneq ($(KBUILD_OUTPUT),)
207 153
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 154 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 155 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 156 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
211 # behavior change in GNU Make 4.4.1. <<
212 need-sub-make := 1 157 need-sub-make := 1
>> 158 # Cancel implicit rules for this Makefile.
>> 159 $(lastword $(MAKEFILE_LIST)): ;
213 endif 160 endif
214 161
>> 162 export sub_make_done := 1
>> 163
215 ifeq ($(need-sub-make),1) 164 ifeq ($(need-sub-make),1)
216 165
217 PHONY += $(MAKECMDGOALS) __sub-make !! 166 PHONY += $(MAKECMDGOALS) sub-make
218 167
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 168 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
220 @: 169 @:
221 170
222 # Invoke a second make in the output directory 171 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: !! 172 sub-make:
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 173 $(Q)$(MAKE) \
225 -f $(abs_srctree)/Makefile $(MAKECMDGO !! 174 $(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \
>> 175 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
226 176
227 else # need-sub-make !! 177 endif # need-sub-make
>> 178 endif # sub_make_done
228 179
229 # We process the rest of the Makefile if this 180 # We process the rest of the Makefile if this is the final invocation of make
>> 181 ifeq ($(need-sub-make),)
>> 182
>> 183 # Do not print "Entering directory ...",
>> 184 # but we want to display it when entering to the output directory
>> 185 # so that IDEs/editors are able to understand relative filenames.
>> 186 MAKEFLAGS += --no-print-directory
>> 187
>> 188 # Call a source code checker (by default, "sparse") as part of the
>> 189 # C compilation.
>> 190 #
>> 191 # Use 'make C=1' to enable checking of only re-compiled files.
>> 192 # Use 'make C=2' to enable checking of *all* source files, regardless
>> 193 # of whether they are re-compiled or not.
>> 194 #
>> 195 # See the file "Documentation/dev-tools/sparse.rst" for more details,
>> 196 # including where to get the "sparse" utility.
>> 197
>> 198 ifeq ("$(origin C)", "command line")
>> 199 KBUILD_CHECKSRC = $(C)
>> 200 endif
>> 201 ifndef KBUILD_CHECKSRC
>> 202 KBUILD_CHECKSRC = 0
>> 203 endif
>> 204
>> 205 # Use make M=dir to specify directory of external module to build
>> 206 # Old syntax make ... SUBDIRS=$PWD is still supported
>> 207 # Setting the environment variable KBUILD_EXTMOD take precedence
>> 208 ifdef SUBDIRS
>> 209 $(warning ================= WARNING ================)
>> 210 $(warning 'SUBDIRS' will be removed after Linux 5.3)
>> 211 $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead)
>> 212 $(warning ==========================================)
>> 213 KBUILD_EXTMOD ?= $(SUBDIRS)
>> 214 endif
230 215
231 ifeq ($(abs_srctree),$(abs_objtree)) !! 216 ifeq ("$(origin M)", "command line")
>> 217 KBUILD_EXTMOD := $(M)
>> 218 endif
>> 219
>> 220 ifeq ($(KBUILD_SRC),)
232 # building in the source tree 221 # building in the source tree
233 srctree := . 222 srctree := .
234 building_out_of_srctree := <<
235 else 223 else
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt !! 224 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
237 # building in a subdirectory o 225 # building in a subdirectory of the source tree
238 srctree := .. 226 srctree := ..
239 else 227 else
240 srctree := $(abs_srctree) !! 228 srctree := $(KBUILD_SRC)
241 endif 229 endif
242 building_out_of_srctree := 1 <<
243 endif 230 endif
244 231
245 ifneq ($(KBUILD_ABS_SRCTREE),) !! 232 export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
246 srctree := $(abs_srctree) <<
247 endif <<
248 233
249 objtree := . 234 objtree := .
>> 235 src := $(srctree)
>> 236 obj := $(objtree)
250 237
251 VPATH := !! 238 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) <<
256 endif <<
257 endif <<
258 239
259 export building_out_of_srctree srctree objtree !! 240 export srctree objtree VPATH
260 241
261 # To make sure we do not include .config for a 242 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri 243 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c 244 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets. 245 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'. 246 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and 247 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c 248 # of make so .config is not included in this case either (for *config).
268 249
269 version_h := include/generated/uapi/linux/vers 250 version_h := include/generated/uapi/linux/version.h
>> 251 old_version_h := include/linux/version.h
270 252
271 clean-targets := %clean mrproper cleandocs 253 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \ 254 no-dot-config-targets := $(clean-targets) \
273 cscope gtags TAGS tag 255 cscope gtags TAGS tags help% %docs check% coccicheck \
274 $(version_h) headers !! 256 $(version_h) headers_% archheaders archscripts \
275 %asm-generic kernelve !! 257 %asm-generic kernelversion %src-pkg
276 outputmakefile rustav !! 258 no-sync-config-targets := $(no-dot-config-targets) install %install \
277 no-sync-config-targets := $(no-dot-config-targ !! 259 kernelrelease
278 image_name !! 260
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 261 config-targets := 0
280 !! 262 mixed-targets := 0
281 config-build := !! 263 dot-config := 1
282 mixed-build := !! 264 may-sync-config := 1
283 need-config := 1 <<
284 may-sync-config := 1 <<
285 single-build := <<
286 265
287 ifneq ($(filter $(no-dot-config-targets), $(MA 266 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifeq ($(filter-out $(no-dot-config-targets !! 267 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289 need-config := !! 268 dot-config := 0
290 endif !! 269 endif
291 endif 270 endif
292 271
293 ifneq ($(filter $(no-sync-config-targets), $(M 272 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294 ifeq ($(filter-out $(no-sync-config-target !! 273 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295 may-sync-config := !! 274 may-sync-config := 0
296 endif !! 275 endif
297 endif 276 endif
298 277
299 need-compiler := $(may-sync-config) <<
300 <<
301 ifneq ($(KBUILD_EXTMOD),) 278 ifneq ($(KBUILD_EXTMOD),)
302 may-sync-config := !! 279 may-sync-config := 0
303 endif 280 endif
304 281
305 ifeq ($(KBUILD_EXTMOD),) 282 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 283 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
307 config-build := 1 !! 284 config-targets := 1
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 285 ifneq ($(words $(MAKECMDGOALS)),1)
309 mixed-build := 1 !! 286 mixed-targets := 1
>> 287 endif
310 endif 288 endif
311 endif <<
312 endif <<
313 <<
314 # We cannot build single targets and the other <<
315 ifneq ($(filter $(single-targets), $(MAKECMDGO <<
316 single-build := 1 <<
317 ifneq ($(filter-out $(single-targets), $(M <<
318 mixed-build := 1 <<
319 endif <<
320 endif 289 endif
321 290
322 # For "make -j clean all", "make -j mrproper d 291 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL 292 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324 ifneq ($(filter-out $(clean-targets),$(MAK !! 293 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325 mixed-build := 1 !! 294 mixed-targets := 1
326 endif !! 295 endif
327 endif 296 endif
328 297
329 # install and modules_install need also be pro 298 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),) 299 ifneq ($(filter install,$(MAKECMDGOALS)),)
331 ifneq ($(filter modules_install,$(MAKECMDG !! 300 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332 mixed-build := 1 !! 301 mixed-targets := 1
333 endif !! 302 endif
334 endif 303 endif
335 304
336 ifdef mixed-build !! 305 ifeq ($(mixed-targets),1)
337 # ============================================ 306 # ===========================================================================
338 # We're called with mixed targets (*config and 307 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one. 308 # Handle them one by one.
340 309
341 PHONY += $(MAKECMDGOALS) __build_one_by_one 310 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 311
343 $(MAKECMDGOALS): __build_one_by_one !! 312 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
344 @: 313 @:
345 314
346 __build_one_by_one: 315 __build_one_by_one:
347 $(Q)set -e; \ 316 $(Q)set -e; \
348 for i in $(MAKECMDGOALS); do \ 317 for i in $(MAKECMDGOALS); do \
349 $(MAKE) -f $(srctree)/Makefile 318 $(MAKE) -f $(srctree)/Makefile $$i; \
350 done 319 done
351 320
352 else # !mixed-build !! 321 else
353 322
354 include $(srctree)/scripts/Kbuild.include !! 323 # We need some generic definitions (do not try to remake the file).
>> 324 scripts/Kbuild.include: ;
>> 325 include scripts/Kbuild.include
355 326
356 # Read KERNELRELEASE from include/config/kerne 327 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 328 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. 329 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA 330 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 331
361 include $(srctree)/scripts/subarch.include !! 332 include scripts/subarch.include
362 333
363 # Cross compiling and selecting different set 334 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 335 # ---------------------------------------------------------------------------
365 # 336 #
366 # When performing cross compilation for other 337 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 338 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 339 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 340 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 341 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 342 # The default ARCH is the host where make is executed.
372 343
373 # CROSS_COMPILE specify the prefix used for al 344 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 345 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 346 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 347 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 348 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 349 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 350 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 351 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 352 ARCH ?= $(SUBARCH)
382 353
383 # Architecture as present in compile.h 354 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 355 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 356 SRCARCH := $(ARCH)
386 357
387 # Additional ARCH settings for x86 358 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 359 ifeq ($(ARCH),i386)
389 SRCARCH := x86 360 SRCARCH := x86
390 endif 361 endif
391 ifeq ($(ARCH),x86_64) 362 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 363 SRCARCH := x86
393 endif 364 endif
394 365
395 # Additional ARCH settings for sparc 366 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 367 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 368 SRCARCH := sparc
398 endif 369 endif
399 ifeq ($(ARCH),sparc64) 370 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 371 SRCARCH := sparc
401 endif 372 endif
402 373
403 # Additional ARCH settings for parisc !! 374 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64) !! 375 ifeq ($(ARCH),sh64)
405 SRCARCH := parisc !! 376 SRCARCH := sh
406 endif <<
407 <<
408 export cross_compiling := <<
409 ifneq ($(SRCARCH),$(SUBARCH)) <<
410 cross_compiling := 1 <<
411 endif 377 endif
412 378
413 KCONFIG_CONFIG ?= .config 379 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 380 export KCONFIG_CONFIG
415 381
416 # SHELL used by kbuild 382 # SHELL used by kbuild
417 CONFIG_SHELL := sh !! 383 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
>> 384 else if [ -x /bin/bash ]; then echo /bin/bash; \
>> 385 else echo sh; fi ; fi)
418 386
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 387 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG 388 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d 389 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422 390
423 ifneq ($(LLVM),) !! 391 HOSTCC = gcc
424 ifneq ($(filter %/,$(LLVM)),) !! 392 HOSTCXX = g++
425 LLVM_PREFIX := $(LLVM) !! 393 KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
426 else ifneq ($(filter -%,$(LLVM)),) !! 394 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
427 LLVM_SUFFIX := $(LLVM) !! 395 $(HOSTCFLAGS)
428 endif !! 396 KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
429 <<
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) <<
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) <<
432 else <<
433 HOSTCC = gcc <<
434 HOSTCXX = g++ <<
435 endif <<
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config <<
438 <<
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto <<
440 -O2 -fomit-frame-poin <<
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) <<
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) <<
443 <<
444 # These flags apply to all Rust code in the tr <<
445 # host programs. <<
446 export rust_common_flags := --edition=2021 \ <<
447 -Zbinary_dep_depin <<
448 -Astable_features <<
449 -Dunsafe_op_in_uns <<
450 -Dnon_ascii_idents <<
451 -Wrust_2018_idioms <<
452 -Wunreachable_pub <<
453 -Wmissing_docs \ <<
454 -Wrustdoc::missing <<
455 -Wclippy::all \ <<
456 -Wclippy::mut_mut <<
457 -Wclippy::needless <<
458 -Wclippy::needless <<
459 -Wclippy::no_mangl <<
460 -Wclippy::dbg_macr <<
461 <<
462 KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS <<
463 $(HOSTCFLAGS) -I $(srct <<
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF <<
465 -I $(srctree)/scripts/i <<
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - <<
467 -Zallow-features= $(HO <<
468 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(H 397 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST 398 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470 399
471 # Make variables (CC, etc...) 400 # Make variables (CC, etc...)
472 CPP = $(CC) -E !! 401 AS = $(CROSS_COMPILE)as
473 ifneq ($(LLVM),) <<
474 CC = $(LLVM_PREFIX)clang$(LLVM_SU <<
475 LD = $(LLVM_PREFIX)ld.lld$(LLVM_S <<
476 AR = $(LLVM_PREFIX)llvm-ar$(LLVM_ <<
477 NM = $(LLVM_PREFIX)llvm-nm$(LLVM_ <<
478 OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$( <<
479 OBJDUMP = $(LLVM_PREFIX)llvm-objdump$( <<
480 READELF = $(LLVM_PREFIX)llvm-readelf$( <<
481 STRIP = $(LLVM_PREFIX)llvm-strip$(LL <<
482 else <<
483 CC = $(CROSS_COMPILE)gcc <<
484 LD = $(CROSS_COMPILE)ld 402 LD = $(CROSS_COMPILE)ld
>> 403 CC = $(CROSS_COMPILE)gcc
>> 404 CPP = $(CC) -E
485 AR = $(CROSS_COMPILE)ar 405 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 406 NM = $(CROSS_COMPILE)nm
>> 407 STRIP = $(CROSS_COMPILE)strip
487 OBJCOPY = $(CROSS_COMPILE)objcopy 408 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 409 OBJDUMP = $(CROSS_COMPILE)objdump
489 READELF = $(CROSS_COMPILE)readelf <<
490 STRIP = $(CROSS_COMPILE)strip <<
491 endif <<
492 RUSTC = rustc <<
493 RUSTDOC = rustdoc <<
494 RUSTFMT = rustfmt <<
495 CLIPPY_DRIVER = clippy-driver <<
496 BINDGEN = bindgen <<
497 PAHOLE = pahole <<
498 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve <<
499 LEX = flex 410 LEX = flex
500 YACC = bison 411 YACC = bison
501 AWK = awk 412 AWK = awk
>> 413 GENKSYMS = scripts/genksyms/genksyms
502 INSTALLKERNEL := installkernel 414 INSTALLKERNEL := installkernel
>> 415 DEPMOD = /sbin/depmod
503 PERL = perl 416 PERL = perl
>> 417 PYTHON = python
>> 418 PYTHON2 = python2
504 PYTHON3 = python3 419 PYTHON3 = python3
505 CHECK = sparse 420 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 <<
514 421
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 422 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - 423 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS := !! 424 NOSTDINC_FLAGS =
518 CFLAGS_MODULE = 425 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 426 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 427 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 428 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 429 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 430 LDFLAGS_vmlinux =
526 431
527 # Use USERINCLUDE when you must reference the 432 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 433 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i 434 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i 435 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 436 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 437 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li <<
534 -include $(srctree)/include/li 438 -include $(srctree)/include/linux/kconfig.h
535 439
536 # Use LINUXINCLUDE when you must reference the 440 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 441 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 442 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i 443 -I$(srctree)/arch/$(SRCARCH)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i 444 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541 $(if $(building_out_of_srctree !! 445 $(if $(KBUILD_SRC), -I$(srctree)/include) \
542 -I$(objtree)/include \ 446 -I$(objtree)/include \
543 $(USERINCLUDE) 447 $(USERINCLUDE)
544 448
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 449 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
546 !! 450 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS := !! 451 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11 !! 452 -Werror-implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar !! 453 -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char !! 454 -std=gnu89
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 455 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 := 456 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 457 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 458 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 459 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE !! 460 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
570 KBUILD_LDFLAGS_MODULE := <<
571 KBUILD_LDFLAGS := 461 KBUILD_LDFLAGS :=
572 CLANG_FLAGS := !! 462 GCC_PLUGINS_CFLAGS :=
573 <<
574 ifeq ($(KBUILD_CLIPPY),1) <<
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY <<
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) <<
577 else <<
578 RUSTC_OR_CLIPPY_QUIET := RUSTC <<
579 RUSTC_OR_CLIPPY = $(RUSTC) <<
580 endif <<
581 463
582 ifdef RUST_LIB_SRC !! 464 export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
583 export RUST_LIB_SRC !! 465 export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
584 endif !! 466 export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
585 !! 467 export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
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 <<
597 468
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC 469 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 470 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 471 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 472 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 473 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 474 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
>> 475 export KBUILD_ARFLAGS
>> 476
>> 477 # When compiling out-of-tree modules, put MODVERDIR in the module
>> 478 # tree rather than in the kernel tree. The kernel tree might
>> 479 # even be read-only.
>> 480 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
604 481
605 # Files to ignore in find ... statements 482 # Files to ignore in find ... statements
606 483
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 484 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 485 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 486 -prune -o
>> 487 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 488 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 489
611 # ============================================ 490 # ===========================================================================
612 # Rules shared between *config targets and bui 491 # Rules shared between *config targets and build targets
613 492
614 # Basic helpers built in scripts/basic/ 493 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic 494 PHONY += scripts_basic
616 scripts_basic: 495 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 496 $(Q)$(MAKE) $(build)=scripts/basic
>> 497 $(Q)rm -f .tmp_quiet_recordmcount
>> 498
>> 499 # To avoid any implicit rule to kick in, define an empty command.
>> 500 scripts/basic/%: scripts_basic ;
618 501
619 PHONY += outputmakefile 502 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 503 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 504 # separate output directory. This allows convenient use of make in the
624 # output directory. 505 # 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: 506 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ !! 507 ifneq ($(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 508 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) !! 509 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
646 $(Q)test -e .gitignore || \ <<
647 { echo "# this is build directory, ign <<
648 endif 510 endif
649 511
>> 512 ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
>> 513 ifneq ($(CROSS_COMPILE),)
>> 514 CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%))
>> 515 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
>> 516 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)
>> 517 GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
>> 518 endif
>> 519 ifneq ($(GCC_TOOLCHAIN),)
>> 520 CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
>> 521 endif
>> 522 CLANG_FLAGS += -no-integrated-as
>> 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
650 # The expansion should be delayed until arch/$ 537 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a 538 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig ( 539 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det 540 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 541 CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1)
655 <<
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), <<
657 include $(srctree)/scripts/Makefile.clang <<
658 endif <<
659 542
660 # Include this also for config targets because !! 543 ifeq ($(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 # ============================================ 544 # ===========================================================================
668 # *config targets only - make sure prerequisit 545 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 546 # in scripts/kconfig to make the *config target
670 547
671 # Read arch-specific Makefile to set KBUILD_DE !! 548 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 549 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 550 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile !! 551 include arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS 552 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676 553
677 config: outputmakefile scripts_basic FORCE !! 554 config: scripts_basic outputmakefile FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 555 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 556
680 %config: outputmakefile scripts_basic FORCE !! 557 %config: scripts_basic outputmakefile FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 558 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 559
683 else #!config-build !! 560 else
684 # ============================================ 561 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 562 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 563 # targets and others. In general all targets except *config targets.
687 564
688 # If building an external module we do not car 565 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules !! 566 # but instead _all depend on modules
690 PHONY += all 567 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),) 568 ifeq ($(KBUILD_EXTMOD),)
692 __all: all !! 569 _all: all
693 else 570 else
694 __all: modules !! 571 _all: modules
695 endif 572 endif
696 573
697 targets := <<
698 <<
699 # Decide whether to build built-in, modular, o 574 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in. 575 # Normally, just do built-in.
701 576
702 KBUILD_MODULES := 577 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1 578 KBUILD_BUILTIN := 1
704 579
705 # If we have only "make modules", don't compil 580 # If we have only "make modules", don't compile built-in objects.
>> 581 # When we're building modules with modversions, we need to consider
>> 582 # the built-in objects during the descend as well, in order to
>> 583 # make sure the checksums are up to date before we record them.
>> 584
706 ifeq ($(MAKECMDGOALS),modules) 585 ifeq ($(MAKECMDGOALS),modules)
707 KBUILD_BUILTIN := !! 586 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
708 endif 587 endif
709 588
710 # If we have "make <whatever> modules", compil 589 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway. 590 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module 591 # Just "make" or "make all" shall build modules as well
713 592
714 ifneq ($(filter all modules nsdeps %compile_co !! 593 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 594 KBUILD_MODULES := 1
716 endif 595 endif
717 596
718 ifeq ($(MAKECMDGOALS),) 597 ifeq ($(MAKECMDGOALS),)
719 KBUILD_MODULES := 1 598 KBUILD_MODULES := 1
720 endif 599 endif
721 600
722 export KBUILD_MODULES KBUILD_BUILTIN 601 export KBUILD_MODULES KBUILD_BUILTIN
723 602
724 ifdef need-config <<
725 include include/config/auto.conf <<
726 endif <<
727 <<
728 ifeq ($(KBUILD_EXTMOD),) 603 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs 604 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y := !! 605 init-y := init/
731 drivers-y := !! 606 drivers-y := drivers/ sound/ firmware/
>> 607 net-y := net/
732 libs-y := lib/ 608 libs-y := lib/
>> 609 core-y := usr/
>> 610 virt-y := virt/
733 endif # KBUILD_EXTMOD 611 endif # KBUILD_EXTMOD
734 612
>> 613 ifeq ($(dot-config),1)
>> 614 include include/config/auto.conf
>> 615 endif
>> 616
735 # The all: target is the default when no targe 617 # The all: target is the default when no target is given on the
736 # command line. 618 # command line.
737 # This allow a user to issue only 'make' to bu 619 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 620 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 621 all: vmlinux
740 622
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover !! 623 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
742 ifdef CONFIG_CC_IS_GCC !! 624 $(call cc-option,-fno-tree-loop-im) \
743 CFLAGS_GCOV += -fno-tree-loop-im !! 625 $(call cc-disable-warning,maybe-uninitialized,)
744 endif <<
745 export CFLAGS_GCOV 626 export CFLAGS_GCOV
746 627
747 # The arch Makefiles can override CC_FLAGS_FTR 628 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER 629 ifdef CONFIG_FUNCTION_TRACER
749 CC_FLAGS_FTRACE := -pg 630 CC_FLAGS_FTRACE := -pg
750 endif 631 endif
751 632
752 include $(srctree)/arch/$(SRCARCH)/Makefile !! 633 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
>> 634 # values of the respective KBUILD_* variables
>> 635 ARCH_CPPFLAGS :=
>> 636 ARCH_AFLAGS :=
>> 637 ARCH_CFLAGS :=
>> 638 include arch/$(SRCARCH)/Makefile
753 639
754 ifdef need-config !! 640 ifeq ($(dot-config),1)
755 ifdef may-sync-config !! 641 ifeq ($(may-sync-config),1)
756 # Read in dependencies to all Kconfig* files, 642 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include 643 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP 644 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd 645 include include/config/auto.conf.cmd
760 646
761 $(KCONFIG_CONFIG): !! 647 # To avoid any implicit rule to kick in, define an empty command
762 @echo >&2 '***' !! 648 $(KCONFIG_CONFIG): ;
763 @echo >&2 '*** Configuration file "$@" <<
764 @echo >&2 '***' <<
765 @echo >&2 '*** Please run some configu <<
766 @echo >&2 '*** "make menuconfig" or "m <<
767 @echo >&2 '***' <<
768 @/bin/false <<
769 649
770 # The actual configuration files used during t 650 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda 651 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con 652 # include/config/auto.conf (which mirrors .config).
773 # 653 #
774 # This exploits the 'multi-target pattern rule 654 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once 655 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b !! 656 %/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 657 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config !! 658 else
784 # External modules and some install targets ne 659 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care 660 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test 661 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf 662 PHONY += include/config/auto.conf
788 663
789 include/config/auto.conf: 664 include/config/auto.conf:
790 @test -e include/generated/autoconf.h !! 665 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
791 echo >&2; 666 echo >&2; \
792 echo >&2 " ERROR: Kernel configuratio 667 echo >&2 " ERROR: Kernel configuration is invalid."; \
793 echo >&2 " include/generated/a 668 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
794 echo >&2 " Run 'make oldconfig 669 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
795 echo >&2 ; 670 echo >&2 ; \
796 /bin/false) 671 /bin/false)
797 672
798 endif # may-sync-config 673 endif # may-sync-config
799 endif # need-config !! 674 endif # $(dot-config)
>> 675
>> 676 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
>> 677 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 678 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 679 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 680 KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
800 681
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch !! 682 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
>> 683 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
>> 684 else
>> 685 ifdef CONFIG_PROFILE_ALL_BRANCHES
>> 686 KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
>> 687 else
>> 688 KBUILD_CFLAGS += -O2
>> 689 endif
>> 690 endif
802 691
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE !! 692 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
804 KBUILD_CFLAGS += -O2 !! 693 $(call cc-disable-warning,maybe-uninitialized,))
805 KBUILD_RUSTFLAGS += -Copt-level=2 <<
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE <<
807 KBUILD_CFLAGS += -Os <<
808 KBUILD_RUSTFLAGS += -Copt-level=s <<
809 endif <<
810 <<
811 # Always set `debug-assertions` and `overflow- <<
812 # depends on `opt-level` and `debug-assertions <<
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( <<
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C <<
815 694
816 # Tell gcc to never replace conditional load w 695 # 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 696 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow !! 697
822 endif !! 698 include scripts/Makefile.kcov
>> 699 include scripts/Makefile.gcc-plugins
823 700
824 ifdef CONFIG_READABLE_ASM 701 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 702 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 703 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 704 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 705 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 706 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
>> 707 $(call cc-option,-fno-ipa-cp-clone,) \
>> 708 $(call cc-option,-fno-partial-inlining)
>> 709 endif
>> 710
>> 711 ifneq ($(CONFIG_FRAME_WARN),0)
>> 712 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
830 endif 713 endif
831 714
832 stackp-flags-y !! 715 stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR) 716 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) 717 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
835 718
836 KBUILD_CFLAGS += $(stackp-flags-y) 719 KBUILD_CFLAGS += $(stackp-flags-y)
837 720
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 721 ifdef CONFIG_CC_IS_CLANG
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 722 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
>> 723 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
>> 724 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
>> 725 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
>> 726 # Quiet clang warning: comparison of unsigned expression < 0 is always false
>> 727 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
>> 728 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
>> 729 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>> 730 # See modpost pattern 2
>> 731 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
>> 732 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
>> 733 else
840 734
>> 735 # These warnings generated too much noise in a regular build.
>> 736 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 737 KBUILD_CFLAGS += -Wno-unused-but-set-variable
>> 738 endif
>> 739
>> 740 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
841 ifdef CONFIG_FRAME_POINTER 741 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 742 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 743 else
845 # Some targets (ARM with Thumb2, for example), 744 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 745 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 746 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 747 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 748 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER 749 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 750 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 751 endif
855 endif 752 endif
856 753
857 # Initialize all stack variables with a 0xAA p !! 754 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 <<
861 755
862 # Initialize all stack variables with a zero v !! 756 ifdef CONFIG_DEBUG_INFO
863 ifdef CONFIG_INIT_STACK_ALL_ZERO !! 757 ifdef CONFIG_DEBUG_INFO_SPLIT
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer !! 758 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 759 else
866 # https://github.com/llvm/llvm-project/issues/ !! 760 KBUILD_CFLAGS += -g
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi <<
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER <<
869 KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENA <<
870 endif 761 endif
>> 762 KBUILD_AFLAGS += -Wa,-gdwarf-2
>> 763 endif
>> 764 ifdef CONFIG_DEBUG_INFO_DWARF4
>> 765 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
871 endif 766 endif
872 767
873 # While VLAs have been removed, GCC produces u !! 768 ifdef CONFIG_DEBUG_INFO_REDUCED
874 # for the randomize_kstack_offset feature. Dis !! 769 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac !! 770 $(call cc-option,-fno-var-tracking)
876 <<
877 # Clear used registers at func exit (to reduce <<
878 ifdef CONFIG_ZERO_CALL_USED_REGS <<
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- <<
880 endif 771 endif
881 772
882 ifdef CONFIG_FUNCTION_TRACER 773 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC !! 774 ifdef CONFIG_FTRACE_MCOUNT_RECORD
884 CC_FLAGS_FTRACE += -mrecord-mcount !! 775 # gcc 5 supports generating the mcount tables directly
>> 776 ifeq ($(call cc-option-yn,-mrecord-mcount),y)
>> 777 CC_FLAGS_FTRACE += -mrecord-mcount
>> 778 export CC_USING_RECORD_MCOUNT := 1
>> 779 endif
885 ifdef CONFIG_HAVE_NOP_MCOUNT 780 ifdef CONFIG_HAVE_NOP_MCOUNT
886 ifeq ($(call cc-option-yn, -mnop-mcount),y 781 ifeq ($(call cc-option-yn, -mnop-mcount),y)
887 CC_FLAGS_FTRACE += -mnop-mcount 782 CC_FLAGS_FTRACE += -mnop-mcount
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU 783 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
889 endif 784 endif
890 endif 785 endif
891 endif 786 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 787 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr <<
905 ifeq ($(call cc-option-yn, -mfentry),y) 788 ifeq ($(call cc-option-yn, -mfentry),y)
906 CC_FLAGS_FTRACE += -mfentry 789 CC_FLAGS_FTRACE += -mfentry
907 CC_FLAGS_USING += -DCC_USING_FENTRY 790 CC_FLAGS_USING += -DCC_USING_FENTRY
908 endif 791 endif
909 endif 792 endif
910 export CC_FLAGS_FTRACE 793 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA 794 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) 795 KBUILD_AFLAGS += $(CC_FLAGS_USING)
>> 796 ifdef CONFIG_DYNAMIC_FTRACE
>> 797 ifdef CONFIG_HAVE_C_RECORDMCOUNT
>> 798 BUILD_C_RECORDMCOUNT := y
>> 799 export BUILD_C_RECORDMCOUNT
>> 800 endif
>> 801 endif
913 endif 802 endif
914 803
915 # We trigger additional mismatches with less i 804 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 805 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 806 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif 807 endif
919 808
920 # `rustc`'s `-Zfunction-sections` applies to d <<
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 809 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f 810 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections 811 LDFLAGS_vmlinux += --gc-sections
925 endif 812 endif
926 813
927 ifdef CONFIG_SHADOW_CALL_STACK !! 814 # arch Makefile may override CC so keep this after arch Makefile is included
928 ifndef CONFIG_DYNAMIC_SCS !! 815 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 <<
935 ifdef CONFIG_LTO_CLANG <<
936 ifdef CONFIG_LTO_CLANG_THIN <<
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 <<
943 # Limit inlining across translation units to r <<
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 <<
945 endif <<
946 <<
947 ifdef CONFIG_LTO <<
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) <<
949 KBUILD_AFLAGS += -fno-lto <<
950 export CC_FLAGS_LTO <<
951 endif <<
952 <<
953 ifdef CONFIG_CFI_CLANG <<
954 CC_FLAGS_CFI := -fsanitize=kcfi <<
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) <<
956 export CC_FLAGS_CFI <<
957 endif <<
958 816
959 # Architectures can define flags to add/remove !! 817 # warn about C99 declaration after statement
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 818 KBUILD_CFLAGS += -Wdeclaration-after-statement
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 819
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) !! 820 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
965 # Set the minimal function alignment. Use the !! 821 KBUILD_CFLAGS += $(call cc-option,-Wvla)
966 # -fmin-function-alignment if it is available, <<
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
970 else <<
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
972 endif <<
973 endif <<
974 822
975 # arch Makefile may override CC so keep this a !! 823 # disable pointer signed / unsigned warnings in gcc 4.0
976 NOSTDINC_FLAGS += -nostdinc !! 824 KBUILD_CFLAGS += -Wno-pointer-sign
977 825
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 826 # disable stringop warnings in gcc 8+
979 # the kernel uses only C99 flexible arrays for !! 827 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
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) + <<
987 828
988 # disable invalid "can't wrap" optimizations f 829 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow !! 830 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
>> 831
>> 832 # clang sets -fmerge-all-constants by default as optimization, but this
>> 833 # is non-conforming behavior for C and in fact breaks the kernel, so we
>> 834 # need to disable it here generally.
>> 835 KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
>> 836
>> 837 # for gcc -fno-merge-all-constants disables everything, but it is fine
>> 838 # to have actual conforming behavior enabled.
>> 839 KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
990 840
991 # Make sure -fstack-check isn't enabled (like 841 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check !! 842 KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
993 843
994 # conserve stack if available 844 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC !! 845 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
996 KBUILD_CFLAGS += -fconserve-stack <<
997 endif <<
998 846
999 # change __FILE__ to the relative path from th !! 847 # Prohibit date/time macros, which would make the build non-deterministic
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 848 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
1001 849
1002 # include additional Makefiles when needed !! 850 # enforce correct pointer usage
1003 include-y := scripts/Ma !! 851 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
1004 include-$(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 += $(KRUSTFLAGS) <<
1025 <<
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 <<
1027 LDFLAGS_vmlinux += --build-id=sha1 <<
1028 <<
1029 KBUILD_LDFLAGS += -z noexecstack <<
1030 ifeq ($(CONFIG_LD_IS_BFD),y) <<
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn <<
1032 endif <<
1033 852
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) !! 853 # Require designated initializers for all marked structures
1035 LDFLAGS_vmlinux += -X !! 854 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
1036 endif <<
1037 855
1038 ifeq ($(CONFIG_RELR),y) !! 856 # change __FILE__ to the relative path from the srctree
1039 # ld.lld before 15 did not support -z pack-re !! 857 KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1041 endif <<
1042 858
1043 # We never want expected sections to be place !! 859 # use the deterministic mode of AR if available
1044 # linker. All sections should be explicitly n !! 860 KBUILD_ARFLAGS := $(call ar-option,D)
1045 ifdef CONFIG_LD_ORPHAN_WARN <<
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG <<
1047 endif <<
1048 861
1049 # Align the bit size of userspace programs wi !! 862 include scripts/Makefile.kasan
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta !! 863 include scripts/Makefile.extrawarn
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta !! 864 include scripts/Makefile.ubsan
>> 865
>> 866 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
>> 867 # last assignments
>> 868 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
>> 869 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
>> 870 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
>> 871
>> 872 # Use --build-id when available.
>> 873 LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
>> 874 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
>> 875 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
1052 876
1053 # make the checker run with the right archite !! 877 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1054 CHECKFLAGS += --arch=$(ARCH) !! 878 LDFLAGS_vmlinux += $(call ld-option, -X,)
>> 879 endif
1055 880
1056 # insure the checker run with the right endia 881 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- 882 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058 883
1059 # the checker needs the correct machine size 884 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 885 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061 886
1062 # Default kernel image to build when no speci 887 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 888 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 889 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 890 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 891 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 892 export KBUILD_IMAGE ?= vmlinux
1068 893
1069 # 894 #
1070 # INSTALL_PATH specifies where to place the u 895 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 896 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 897 export INSTALL_PATH ?= /boot
1073 898
1074 # 899 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 900 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 901 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 902 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 903 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 904 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 905
1081 # 906 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 907 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 908 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 909 # makefile but the argument can be passed to make if needed.
1085 # 910 #
1086 911
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 912 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 913 export MODLIB
1089 914
1090 PHONY += prepare0 !! 915 #
>> 916 # INSTALL_MOD_STRIP, if defined, will cause modules to be
>> 917 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
>> 918 # the default option --strip-debug will be used. Otherwise,
>> 919 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
>> 920
>> 921 ifdef INSTALL_MOD_STRIP
>> 922 ifeq ($(INSTALL_MOD_STRIP),1)
>> 923 mod_strip_cmd = $(STRIP) --strip-debug
>> 924 else
>> 925 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
>> 926 endif # INSTALL_MOD_STRIP=1
>> 927 else
>> 928 mod_strip_cmd = true
>> 929 endif # INSTALL_MOD_STRIP
>> 930 export mod_strip_cmd
>> 931
>> 932 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
>> 933 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
>> 934 # or CONFIG_MODULE_COMPRESS_XZ.
>> 935
>> 936 mod_compress_cmd = true
>> 937 ifdef CONFIG_MODULE_COMPRESS
>> 938 ifdef CONFIG_MODULE_COMPRESS_GZIP
>> 939 mod_compress_cmd = gzip -n -f
>> 940 endif # CONFIG_MODULE_COMPRESS_GZIP
>> 941 ifdef CONFIG_MODULE_COMPRESS_XZ
>> 942 mod_compress_cmd = xz -f
>> 943 endif # CONFIG_MODULE_COMPRESS_XZ
>> 944 endif # CONFIG_MODULE_COMPRESS
>> 945 export mod_compress_cmd
>> 946
>> 947 # Select initial ramdisk compression format, default is gzip(1).
>> 948 # This shall be used by the dracut(8) tool while creating an initramfs image.
>> 949 #
>> 950 INITRD_COMPRESS-y := gzip
>> 951 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
>> 952 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
>> 953 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
>> 954 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
>> 955 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
>> 956 # do not export INITRD_COMPRESS, since we didn't actually
>> 957 # choose a sane default compression above.
>> 958 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1091 959
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 960 ifdef CONFIG_MODULE_SIG_ALL
1093 export MODORDER := $(extmod_prefix)modules.or !! 961 $(eval $(call config_filename,MODULE_SIG_KEY))
1094 export MODULES_NSDEPS := $(extmod_prefix)modu <<
1095 962
1096 ifeq ($(KBUILD_EXTMOD),) !! 963 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
>> 964 else
>> 965 mod_sign_cmd = true
>> 966 endif
>> 967 export mod_sign_cmd
1097 968
1098 build-dir := . !! 969 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 970
1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 971 ifdef CONFIG_STACK_VALIDATION
1109 ifdef CONFIG_MODULES !! 972 has_libelf := $(call try-run,\
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a !! 973 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib !! 974 ifeq ($(has_libelf),1)
1112 else !! 975 objtool_target := tools/objtool FORCE
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 976 else
>> 977 SKIP_STACK_VALIDATION := 1
>> 978 export SKIP_STACK_VALIDATION
>> 979 endif
1114 endif 980 endif
1115 981
1116 export KBUILD_VMLINUX_LIBS !! 982 PHONY += prepare0
1117 export KBUILD_LDS := arch/$(SRCARCH) !! 983
>> 984 ifeq ($(KBUILD_EXTMOD),)
>> 985 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
>> 986
>> 987 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
>> 988 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 989 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
>> 990
>> 991 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
>> 992 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
>> 993
>> 994 init-y := $(patsubst %/, %/built-in.a, $(init-y))
>> 995 core-y := $(patsubst %/, %/built-in.a, $(core-y))
>> 996 drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
>> 997 net-y := $(patsubst %/, %/built-in.a, $(net-y))
>> 998 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
>> 999 libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
>> 1000 virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
1118 1001
>> 1002 # Externally visible symbols (used by link-vmlinux.sh)
>> 1003 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
>> 1004 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
>> 1005 export KBUILD_VMLINUX_LIBS := $(libs-y1)
>> 1006 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 1007 export LDFLAGS_vmlinux
>> 1008 # used by scripts/package/Makefile
>> 1009 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
>> 1010
>> 1011 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
>> 1012
>> 1013 # Recurse until adjust_autoksyms.sh is satisfied
>> 1014 PHONY += autoksyms_recursive
>> 1015 autoksyms_recursive: $(vmlinux-deps)
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1016 ifdef CONFIG_TRIM_UNUSED_KSYMS
>> 1017 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
>> 1018 "$(MAKE) -f $(srctree)/Makefile vmlinux"
>> 1019 endif
>> 1020
1120 # For the kernel to actually contain only the 1021 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi 1022 # we have to build modules as well to determine what those symbols are.
1122 KBUILD_MODULES := 1 !! 1023 # (this can be evaluated only once include/config/auto.conf has been included)
>> 1024 ifdef CONFIG_TRIM_UNUSED_KSYMS
>> 1025 KBUILD_MODULES := 1
1123 endif 1026 endif
1124 1027
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1028 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 1029
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1030 $(autoksyms_h):
1141 @: !! 1031 $(Q)mkdir -p $(dir $@)
>> 1032 $(Q)touch $@
>> 1033
>> 1034 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
>> 1035
>> 1036 # Final link of vmlinux with optional arch pass after final link
>> 1037 cmd_link-vmlinux = \
>> 1038 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \
>> 1039 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
>> 1040
>> 1041 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
>> 1042 ifdef CONFIG_GDB_SCRIPTS
>> 1043 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
>> 1044 endif
>> 1045 +$(call if_changed,link-vmlinux)
1142 1046
1143 PHONY += vmlinux !! 1047 targets := vmlinux
1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1048
1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1049 # Build samples along the rest of the kernel. This needs headers_install.
1146 # unrelated; the decompressors just happen to !! 1050 ifdef CONFIG_SAMPLES
1147 # arch/*/boot/compressed/vmlinux. !! 1051 vmlinux-dirs += samples
1148 # Export LDFLAGS_vmlinux only to scripts/Make !! 1052 samples: headers_install
1149 # !! 1053 endif
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 1054
1159 # The actual objects are generated when desce 1055 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1056 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1057 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1162 1058
1163 ifeq ($(origin KERNELRELEASE),file) !! 1059 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1060 # Preset locale variables to speed up the build process. Limit locale
1165 else !! 1061 # tweaks to this spot to avoid wrong language settings when running
1166 filechk_kernel.release = echo $(KERNELRELEASE !! 1062 # make menuconfig etc.
1167 endif !! 1063 # Error messages still appears in the original language
>> 1064
>> 1065 PHONY += $(vmlinux-dirs)
>> 1066 $(vmlinux-dirs): prepare
>> 1067 $(Q)$(MAKE) $(build)=$@ need-builtin=1
>> 1068
>> 1069 filechk_kernel.release = \
>> 1070 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1168 1071
1169 # Store (new) KERNELRELEASE string in include 1072 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE !! 1073 include/config/kernel.release: $(srctree)/Makefile FORCE
1171 $(call filechk,kernel.release) 1074 $(call filechk,kernel.release)
1172 1075
1173 # Additional helpers built in scripts/ 1076 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr 1077 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel 1078 # in parallel
1176 PHONY += scripts 1079 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc 1080 scripts: scripts_basic scripts_dtc
1178 $(Q)$(MAKE) $(build)=$(@) 1081 $(Q)$(MAKE) $(build)=$(@)
1179 1082
1180 # Things we need to do before we recursively 1083 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1084 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1085 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1086 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1087 # version.h and scripts_basic is processed / created.
1185 1088
1186 PHONY += prepare archprepare !! 1089 PHONY += prepare archprepare prepare1 prepare2 prepare3
>> 1090
>> 1091 # prepare3 is used to check if we are building in a separate output directory,
>> 1092 # and if so do:
>> 1093 # 1) Check that make has not been executed in the kernel src $(srctree)
>> 1094 prepare3: include/config/kernel.release
>> 1095 ifneq ($(KBUILD_SRC),)
>> 1096 @$(kecho) ' Using $(srctree) as source for kernel'
>> 1097 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
>> 1098 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
>> 1099 echo >&2 " in the '$(srctree)' directory.";\
>> 1100 /bin/false; \
>> 1101 fi;
>> 1102 endif
>> 1103
>> 1104 # prepare2 creates a makefile if using a separate output directory.
>> 1105 # From this point forward, .config has been reprocessed, so any rules
>> 1106 # that need to depend on updated CONFIG_* values can be checked here.
>> 1107 prepare2: prepare3 outputmakefile asm-generic
>> 1108
>> 1109 prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h
>> 1110 $(cmd_crmodverdir)
1187 1111
1188 archprepare: outputmakefile archheaders archs !! 1112 archprepare: archheaders archscripts prepare1 scripts
1189 asm-generic $(version_h) include/gene <<
1190 include/generated/compile.h include/g <<
1191 1113
1192 prepare0: archprepare 1114 prepare0: archprepare
1193 $(Q)$(MAKE) $(build)=scripts/mod 1115 $(Q)$(MAKE) $(build)=scripts/mod
1194 $(Q)$(MAKE) $(build)=. prepare !! 1116 $(Q)$(MAKE) $(build)=.
1195 1117
1196 # All the preparing.. 1118 # All the preparing..
1197 prepare: prepare0 !! 1119 prepare: prepare0 prepare-objtool
1198 ifdef CONFIG_RUST <<
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1200 $(Q)$(MAKE) $(build)=rust <<
1201 endif <<
1202 <<
1203 PHONY += remove-stale-files <<
1204 remove-stale-files: <<
1205 $(Q)$(srctree)/scripts/remove-stale-f <<
1206 1120
1207 # Support for using generic headers in asm-ge 1121 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1122 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209 1123
1210 PHONY += asm-generic uapi-asm-generic 1124 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic 1125 asm-generic: uapi-asm-generic
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1126 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm
1213 generic=include/asm-generic <<
1214 uapi-asm-generic: 1127 uapi-asm-generic:
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1128 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm
1216 generic=include/uapi/asm-generic !! 1129
>> 1130 PHONY += prepare-objtool
>> 1131 prepare-objtool: $(objtool_target)
>> 1132 ifeq ($(SKIP_STACK_VALIDATION),1)
>> 1133 ifdef CONFIG_UNWINDER_ORC
>> 1134 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1135 @false
>> 1136 else
>> 1137 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
>> 1138 endif
>> 1139 endif
1217 1140
1218 # Generate some files 1141 # Generate some files
1219 # ------------------------------------------- 1142 # ---------------------------------------------------------------------------
1220 1143
1221 # KERNELRELEASE can change from a few differe 1144 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1145 # needs to be updated, so this check is forced on all builds
1223 1146
1224 uts_len := 64 1147 uts_len := 64
1225 define filechk_utsrelease.h 1148 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1149 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1150 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1151 exit 1; \
1229 fi; 1152 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR 1153 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef 1154 endef
1232 1155
1233 define filechk_version.h 1156 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then !! 1157 echo \#define LINUX_VERSION_CODE $(shell \
1235 echo \#define LINUX_VERSION_C !! 1158 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1236 expr $(VERSION) \* 65536 + $( !! 1159 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 1160 endef
1247 1161
1248 $(version_h): private PATCHLEVEL := $(or $(PA <<
1249 $(version_h): private SUBLEVEL := $(or $(SUBL <<
1250 $(version_h): FORCE 1162 $(version_h): FORCE
1251 $(call filechk,version.h) 1163 $(call filechk,version.h)
>> 1164 $(Q)rm -f $(old_version_h)
1252 1165
1253 include/generated/utsrelease.h: include/confi 1166 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1167 $(call filechk,utsrelease.h)
1255 1168
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 1169 PHONY += headerdep
1263 headerdep: 1170 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1171 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1172 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1173
1267 # ------------------------------------------- 1174 # ---------------------------------------------------------------------------
1268 # Kernel headers 1175 # Kernel headers
1269 1176
1270 #Default location for installed headers 1177 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1178 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1179
1273 quiet_cmd_headers_install = INSTALL $(INSTALL !! 1180 # If we do an all arch process set dst to include/arch-$(SRCARCH)
1274 cmd_headers_install = \ !! 1181 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 <<
1279 PHONY += headers_install <<
1280 headers_install: headers <<
1281 $(call cmd,headers_install) <<
1282 1182
1283 PHONY += archheaders archscripts 1183 PHONY += archheaders archscripts
1284 1184
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he !! 1185 PHONY += __headers
1286 !! 1186 __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
1287 PHONY += headers !! 1187 $(Q)$(MAKE) $(build)=scripts build_unifdef
1288 headers: $(version_h) scripts_unifdef uapi-as !! 1188
1289 $(if $(filter um, $(SRCARCH)), $(erro !! 1189 PHONY += headers_install_all
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi !! 1190 headers_install_all:
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC !! 1191 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1292 <<
1293 ifdef CONFIG_HEADERS_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 <<
1304 # Many distributions have the custom install <<
1305 # If DKMS is installed, 'make install' will e <<
1306 # to this Makefile to build and install exter <<
1307 # Cancel sub_make_done so that options such a <<
1308 <<
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) <<
1310 cmd_install = unset sub_make_done; $(sr <<
1311 <<
1312 # ------------------------------------------- <<
1313 # vDSO install <<
1314 <<
1315 PHONY += vdso_install <<
1316 vdso_install: export INSTALL_FILES = $(vdso-i <<
1317 vdso_install: <<
1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1319 <<
1320 # ------------------------------------------- <<
1321 # Tools <<
1322 <<
1323 ifdef CONFIG_OBJTOOL <<
1324 prepare: tools/objtool <<
1325 endif <<
1326 <<
1327 ifdef CONFIG_BPF <<
1328 ifdef CONFIG_DEBUG_INFO_BTF <<
1329 prepare: tools/bpf/resolve_btfids <<
1330 endif <<
1331 endif <<
1332 <<
1333 # The tools build system is not a part of Kbu <<
1334 # its own unique issues. If you need to integ <<
1335 # please consider locating that tool outside <<
1336 # standard Kbuild "hostprogs" syntax instead <<
1337 # here. See Documentation/kbuild/makefiles.rs <<
1338 <<
1339 PHONY += resolve_btfids_clean <<
1340 <<
1341 resolve_btfids_O = $(abspath $(objtree))/tool <<
1342 1192
1343 # tools/bpf/resolve_btfids directory might no !! 1193 PHONY += headers_install
1344 # in output directory, skip its clean in that !! 1194 headers_install: __headers
1345 resolve_btfids_clean: !! 1195 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1346 ifneq ($(wildcard $(resolve_btfids_O)),) !! 1196 $(error Headers not exportable for the $(SRCARCH) architecture))
1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ !! 1197 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
1348 endif !! 1198 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
>> 1199
>> 1200 PHONY += headers_check_all
>> 1201 headers_check_all: headers_install_all
>> 1202 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
>> 1203
>> 1204 PHONY += headers_check
>> 1205 headers_check: headers_install
>> 1206 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
>> 1207 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
1349 1208
1350 # Clear a bunch of variables before executing !! 1209 ifdef CONFIG_HEADERS_CHECK
1351 ifeq ($(quiet),silent_) !! 1210 all: headers_check
1352 tools_silent=s <<
1353 endif 1211 endif
1354 1212
1355 tools/: FORCE <<
1356 $(Q)mkdir -p $(objtree)/tools <<
1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1358 <<
1359 tools/%: FORCE <<
1360 $(Q)mkdir -p $(objtree)/tools <<
1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1362 <<
1363 # ------------------------------------------- 1213 # ---------------------------------------------------------------------------
1364 # Kernel selftest 1214 # Kernel selftest
1365 1215
1366 PHONY += kselftest 1216 PHONY += kselftest
1367 kselftest: headers !! 1217 kselftest:
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi 1218 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369 1219
1370 kselftest-%: headers FORCE !! 1220 PHONY += kselftest-clean
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1221 kselftest-clean:
>> 1222 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1372 1223
1373 PHONY += kselftest-merge 1224 PHONY += kselftest-merge
1374 kselftest-merge: 1225 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1226 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1227 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1377 xargs $(srctree)/scripts/kcon !! 1228 -m $(objtree)/.config \
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol !! 1229 $(srctree)/tools/testing/selftests/*/config
>> 1230 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379 1231
1380 # ------------------------------------------- 1232 # ---------------------------------------------------------------------------
1381 # Devicetree files 1233 # Devicetree files
1382 1234
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ 1235 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts 1236 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif 1237 endif
1386 1238
1387 ifneq ($(dtstree),) 1239 ifneq ($(dtstree),)
1388 1240
1389 %.dtb: dtbs_prepare !! 1241 %.dtb: prepare3 scripts_dtc
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts <<
1391 <<
1392 %.dtbo: dtbs_prepare <<
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts 1242 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394 1243
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1244 PHONY += dtbs dtbs_install dt_binding_check
1396 dtbs: dtbs_prepare !! 1245 dtbs dtbs_check: prepare3 scripts_dtc
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1246 $(Q)$(MAKE) $(build)=$(dtstree)
1398 <<
1399 # include/config/kernel.release is actually n <<
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) <<
1401 # dtbs_install depend on it as dtbs_install m <<
1402 dtbs_prepare: include/config/kernel.release s <<
1403 1247
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), !! 1248 dtbs_check: export CHECK_DTBS=1
1405 export CHECK_DTBS=y !! 1249 dtbs_check: dt_binding_check
1406 endif <<
1407 <<
1408 ifneq ($(CHECK_DTBS),) <<
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif <<
1411 <<
1412 dtbs_check: dtbs <<
1413 1250
1414 dtbs_install: 1251 dtbs_install:
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1252 $(Q)$(MAKE) $(dtbinst)=$(dtstree)
1416 1253
1417 ifdef CONFIG_OF_EARLY_FLATTREE 1254 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs 1255 all: dtbs
1419 endif 1256 endif
1420 1257
1421 endif 1258 endif
1422 1259
1423 PHONY += scripts_dtc 1260 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic 1261 scripts_dtc: scripts_basic
1425 $(Q)$(MAKE) $(build)=scripts/dtc 1262 $(Q)$(MAKE) $(build)=scripts/dtc
1426 1263
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1264 dt_binding_check: scripts_dtc
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 1265 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437 1266
1438 PHONY += dt_compatible_check <<
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 <<
1442 # ------------------------------------------- 1267 # ---------------------------------------------------------------------------
1443 # Modules 1268 # Modules
1444 1269
1445 ifdef CONFIG_MODULES 1270 ifdef CONFIG_MODULES
1446 1271
1447 # By default, build modules as well 1272 # By default, build modules as well
1448 1273
1449 all: modules 1274 all: modules
1450 1275
1451 # When we're building modules with modversion <<
1452 # the built-in objects during the descend as <<
1453 # make sure the checksums are up to date befo <<
1454 ifdef CONFIG_MODVERSIONS <<
1455 KBUILD_BUILTIN := 1 <<
1456 endif <<
1457 <<
1458 # Build modules 1276 # Build modules
1459 # 1277 #
>> 1278 # A module can be listed more than once in obj-m resulting in
>> 1279 # duplicate lines in modules.order files. Those are removed
>> 1280 # using awk while concatenating to the final file.
>> 1281
>> 1282 PHONY += modules
>> 1283 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
>> 1284 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
>> 1285 @$(kecho) ' Building modules, stage 2.';
>> 1286 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1460 1287
1461 # *.ko are usually independent of vmlinux, bu !! 1288 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1462 # is an exception. !! 1289 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES !! 1290
1464 KBUILD_BUILTIN := 1 !! 1291 %/modules.builtin: include/config/auto.conf include/config/tristate.conf
1465 modules: vmlinux !! 1292 $(Q)$(MAKE) $(modbuiltin)=$*
1466 endif <<
1467 1293
1468 modules: modules_prepare <<
1469 1294
1470 # Target to prepare building external modules 1295 # Target to prepare building external modules
>> 1296 PHONY += modules_prepare
1471 modules_prepare: prepare 1297 modules_prepare: prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ !! 1298
>> 1299 # Target to install modules
>> 1300 PHONY += modules_install
>> 1301 modules_install: _modinst_ _modinst_post
>> 1302
>> 1303 PHONY += _modinst_
>> 1304 _modinst_:
>> 1305 @rm -rf $(MODLIB)/kernel
>> 1306 @rm -f $(MODLIB)/source
>> 1307 @mkdir -p $(MODLIB)/kernel
>> 1308 @ln -s $(abspath $(srctree)) $(MODLIB)/source
>> 1309 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1310 rm -f $(MODLIB)/build ; \
>> 1311 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1312 fi
>> 1313 @cp -f $(objtree)/modules.order $(MODLIB)/
>> 1314 @cp -f $(objtree)/modules.builtin $(MODLIB)/
>> 1315 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1316
>> 1317 # This depmod is only for convenience to give the initial
>> 1318 # boot a modules.dep even before / is mounted read-write. However the
>> 1319 # boot script depmod is the master version.
>> 1320 PHONY += _modinst_post
>> 1321 _modinst_post: _modinst_
>> 1322 $(call cmd,depmod)
>> 1323
>> 1324 ifeq ($(CONFIG_MODULE_SIG), y)
>> 1325 PHONY += modules_sign
>> 1326 modules_sign:
>> 1327 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
>> 1328 endif
>> 1329
>> 1330 else # CONFIG_MODULES
>> 1331
>> 1332 # Modules not configured
>> 1333 # ---------------------------------------------------------------------------
>> 1334
>> 1335 PHONY += modules modules_install
>> 1336 modules modules_install:
>> 1337 @echo >&2
>> 1338 @echo >&2 "The present kernel configuration has modules disabled."
>> 1339 @echo >&2 "Type 'make config' and enable loadable module support."
>> 1340 @echo >&2 "Then build a kernel with module support enabled."
>> 1341 @echo >&2
>> 1342 @exit 1
1473 1343
1474 endif # CONFIG_MODULES 1344 endif # CONFIG_MODULES
1475 1345
1476 ### 1346 ###
1477 # Cleaning is done on three levels. 1347 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1348 # make clean Delete most generated files
1479 # Leave enough to build extern 1349 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1350 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1351 # make distclean Remove editor backup files, patch leftover files and the like
1482 1352
1483 # Directories & files removed with 'make clea 1353 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1354 CLEAN_DIRS += $(MODVERDIR) include/ksym
1485 modules.builtin modules.builti <<
1486 compile_commands.json rust/tes <<
1487 rust-project.json .vmlinux.obj <<
1488 1355
1489 # Directories & files removed with 'make mrpr 1356 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene !! 1357 MRPROPER_DIRS += include/config usr/include include/generated \
1491 arch/$(SRCARCH)/include/gen !! 1358 arch/*/include/generated .tmp_objdiff
1492 debian snap tar-install PKG !! 1359 MRPROPER_FILES += .config .config.old .version \
1493 .config .config.old .versio !! 1360 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1494 Module.symvers \ !! 1361 signing_key.pem signing_key.priv signing_key.x509 \
1495 certs/signing_key.pem \ !! 1362 x509.genkey extra_certificates signing_key.x509.keyid \
1496 certs/x509.genkey \ !! 1363 signing_key.x509.signer vmlinux-gdb.py
1497 vmlinux-gdb.py \ <<
1498 rpmbuild \ <<
1499 rust/libmacros.so <<
1500 1364
1501 # clean - Delete most, but leave enough to bu 1365 # clean - Delete most, but leave enough to build external modules
1502 # 1366 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1367 clean: rm-dirs := $(CLEAN_DIRS)
>> 1368 clean: rm-files := $(CLEAN_FILES)
>> 1369 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1504 1370
1505 PHONY += archclean vmlinuxclean !! 1371 PHONY += $(clean-dirs) clean archclean vmlinuxclean
>> 1372 $(clean-dirs):
>> 1373 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1506 1374
1507 vmlinuxclean: 1375 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1376 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1377 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1378
1511 clean: archclean vmlinuxclean resolve_btfids_ !! 1379 clean: archclean vmlinuxclean
1512 1380
1513 # mrproper - Delete all generated files, incl 1381 # mrproper - Delete all generated files, including .config
1514 # 1382 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1383 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
>> 1384 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs := $(addprefix _mrproper_, 1385 mrproper-dirs := $(addprefix _mrproper_,scripts)
1517 1386
1518 PHONY += $(mrproper-dirs) mrproper 1387 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs): 1388 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1389 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1390
1522 mrproper: clean $(mrproper-dirs) 1391 mrproper: clean $(mrproper-dirs)
>> 1392 $(call cmd,rmdirs)
1523 $(call cmd,rmfiles) 1393 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 1394
1528 # distclean 1395 # distclean
1529 # 1396 #
1530 PHONY += distclean 1397 PHONY += distclean
1531 1398
1532 distclean: mrproper 1399 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ !! 1400 @find $(srctree) $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1401 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* 1402 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536 -o -name 'core' -o -name tags !! 1403 -o -name 'core' \) \
1537 -o -name GPATH -o -name GRTAG <<
1538 -type f -print | xargs rm -f 1404 -type f -print | xargs rm -f
1539 1405
1540 1406
1541 # Packaging of the kernel to various formats 1407 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1408 # ---------------------------------------------------------------------------
>> 1409 package-dir := scripts/package
1543 1410
1544 %src-pkg: FORCE 1411 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1412 $(Q)$(MAKE) $(build)=$(package-dir) $@
1546 %pkg: include/config/kernel.release FORCE 1413 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1414 $(Q)$(MAKE) $(build)=$(package-dir) $@
>> 1415
1548 1416
1549 # Brief documentation of the typical targets 1417 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1418 # ---------------------------------------------------------------------------
1551 1419
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1420 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1421 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1422 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1423 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1424
1557 PHONY += help 1425 PHONY += help
1558 help: 1426 help:
1559 @echo 'Cleaning targets:' 1427 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1428 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1429 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1430 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1431 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1432 @echo ''
>> 1433 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1434 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1435 @echo ''
1567 @echo 'Other generic targets:' 1436 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1437 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1438 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1439 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1440 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 1441 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1442 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1443 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1444 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1445 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1446 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1447 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1448 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1449 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1450 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1451 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1452 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1453 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1454 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1455 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1456 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1457 echo ''
1590 @echo 'Static analysers:' 1458 @echo 'Static analysers:'
1591 @echo ' checkstack - Generate !! 1459 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st !! 1460 @echo ' namespacecheck - Name space analysis on compiled kernel'
1593 @echo ' versioncheck - Sanity ch 1461 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1462 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1463 @echo ' export_report - List the usages of all exported symbols'
>> 1464 @echo ' headers_check - Sanity check on exported headers'
1596 @echo ' headerdep - Detect in 1465 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit 1466 @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 '' 1467 @echo ''
1604 @echo 'Kernel selftest:' 1468 @echo 'Kernel selftest:'
1605 @echo ' kselftest - Build a !! 1469 @echo ' kselftest - Build and run kernel selftest (run as root)'
1606 @echo ' Build, !! 1470 @echo ' Build, install, and boot kernel before'
1607 @echo ' running !! 1471 @echo ' running kselftest on it'
1608 @echo ' Run as !! 1472 @echo ' kselftest-clean - Remove all generated kselftest files'
1609 @echo ' kselftest-all - Build k !! 1473 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
1610 @echo ' kselftest-install - Build a !! 1474 @echo ' .config.'
1611 @echo ' kselftest-clean - Remove <<
1612 @echo ' kselftest-merge - Merge a <<
1613 @echo ' kselfte <<
1614 @echo '' <<
1615 @echo 'Rust targets:' <<
1616 @echo ' rustavailable - Checks wh <<
1617 @echo ' available <<
1618 @echo ' rustfmt - Reformat <<
1619 @echo ' rustfmtcheck - Checks if <<
1620 @echo ' is format <<
1621 @echo ' rustdoc - Generate <<
1622 @echo ' (requires <<
1623 @echo ' rusttest - Runs the <<
1624 @echo ' (requires <<
1625 @echo ' rust-analyzer - Generate <<
1626 @echo ' (requires <<
1627 @echo ' dir/file.[os] - Build spe <<
1628 @echo ' dir/file.rsi - Build mac <<
1629 @echo ' Run with <<
1630 @echo ' The outpu <<
1631 @echo ' dir/file.ll - Build the <<
1632 @echo '' 1475 @echo ''
1633 @$(if $(dtstree), \ 1476 @$(if $(dtstree), \
1634 echo 'Devicetree:'; \ 1477 echo 'Devicetree:'; \
1635 echo '* dtbs - !! 1478 echo '* dtbs - Build device tree blobs for enabled boards'; \
1636 echo ' dtbs_install - !! 1479 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637 echo ' dt_binding_check - <<
1638 echo ' dt_binding_schema - <<
1639 echo ' dtbs_check - <<
1640 echo '') 1480 echo '')
1641 1481
1642 @echo 'Userspace tools targets:' 1482 @echo 'Userspace tools targets:'
1643 @echo ' use "make tools/help"' 1483 @echo ' use "make tools/help"'
1644 @echo ' or "cd tools; make help"' 1484 @echo ' or "cd tools; make help"'
1645 @echo '' 1485 @echo ''
1646 @echo 'Kernel packaging:' 1486 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi !! 1487 @$(MAKE) $(build)=$(package-dir) help
1648 @echo '' 1488 @echo ''
1649 @echo 'Documentation targets:' 1489 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ 1490 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651 @echo '' 1491 @echo ''
1652 @echo 'Architecture-specific targets !! 1492 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ !! 1493 @$(if $(archhelp),$(archhelp),\
1654 echo ' No architecture-speci !! 1494 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1495 @echo ''
1656 @$(if $(boards), \ 1496 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1497 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % !! 1498 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1499 echo '')
1660 @$(if $(board-dirs), \ 1500 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1501 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1502 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1503 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1504 echo '')
1665 1505
1666 @echo ' make V=n [targets] 1: ver !! 1506 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667 @echo ' 2: giv !! 1507 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 1508 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check !! 1509 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1671 @echo ' (spars <<
1672 @echo ' make C=2 [targets] Force 1510 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1511 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1512 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1513 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1514 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1515 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a <<
1680 @echo ' Multiple leve 1516 @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 '' 1517 @echo ''
1686 @echo 'Execute "make" or "make all" 1518 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1519 @echo 'For further info see the ./README file'
1688 1520
1689 1521
1690 help-board-dirs := $(addprefix help-,$(board- 1522 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1523
1692 help-boards: $(help-board-dirs) 1524 help-boards: $(help-board-dirs)
1693 1525
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1526 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1527
1696 $(help-board-dirs): help-%: 1528 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1529 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1530 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1531 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1532 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1533 echo '')
1702 1534
1703 1535
1704 # Documentation targets 1536 # Documentation targets
1705 # ------------------------------------------- 1537 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html 1538 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707 linkcheckdocs dochelp refcheck !! 1539 linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS) 1540 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): !! 1541 $(DOC_TARGETS): scripts_basic FORCE
1710 $(Q)$(MAKE) $(build)=Documentation $@ 1542 $(Q)$(MAKE) $(build)=Documentation $@
1711 1543
1712 <<
1713 # Rust targets <<
1714 # ------------------------------------------- <<
1715 <<
1716 # "Is Rust available?" target <<
1717 PHONY += rustavailable <<
1718 rustavailable: <<
1719 +$(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 1544 else # KBUILD_EXTMOD
1772 1545
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### 1546 ###
1776 # External module support. 1547 # External module support.
1777 # When building external modules the kernel u 1548 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1549 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1550 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands !! 1551 # in the basis kernel ordinary make commands (without M=...) must
>> 1552 # be used.
>> 1553 #
>> 1554 # The following are the only valid targets when building external
>> 1555 # modules.
>> 1556 # make M=dir clean Delete all automatically generated files
>> 1557 # make M=dir modules Make all modules in specified dir
>> 1558 # make M=dir Same as 'make M=dir modules'
>> 1559 # make M=dir modules_install
>> 1560 # Install the modules built in the module directory
>> 1561 # Assumes install directory is already created
1781 1562
1782 # We are always building only modules. !! 1563 # We are always building modules
1783 KBUILD_BUILTIN := <<
1784 KBUILD_MODULES := 1 1564 KBUILD_MODULES := 1
1785 1565
1786 build-dir := $(KBUILD_EXTMOD) !! 1566 PHONY += $(objtree)/Module.symvers
>> 1567 $(objtree)/Module.symvers:
>> 1568 @test -e $(objtree)/Module.symvers || ( \
>> 1569 echo; \
>> 1570 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
>> 1571 echo " is missing; modules will have no dependencies and modversions."; \
>> 1572 echo )
>> 1573
>> 1574 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
>> 1575 PHONY += $(module-dirs) modules
>> 1576 $(module-dirs): prepare $(objtree)/Module.symvers
>> 1577 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1787 1578
1788 compile_commands.json: $(extmod_prefix)compil !! 1579 modules: $(module-dirs)
1789 PHONY += compile_commands.json !! 1580 @$(kecho) ' Building modules, stage 2.';
>> 1581 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1790 1582
1791 clean-dirs := $(KBUILD_EXTMOD) !! 1583 PHONY += modules_install
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1584 modules_install: _emodinst_ _emodinst_post
1793 $(KBUILD_EXTMOD)/compile_commands.jso <<
1794 1585
1795 PHONY += prepare !! 1586 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1796 # now expand this into a simple variable to r !! 1587 PHONY += _emodinst_
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1588 _emodinst_:
1798 prepare: !! 1589 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1590 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1800 echo >&2 "warning: the compil !! 1591
1801 echo >&2 " The kernel was bu !! 1592 PHONY += _emodinst_post
1802 echo >&2 " You are using: !! 1593 _emodinst_post: _emodinst_
1803 fi !! 1594 $(call cmd,depmod)
>> 1595
>> 1596 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
>> 1597
>> 1598 PHONY += $(clean-dirs) clean
>> 1599 $(clean-dirs):
>> 1600 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
>> 1601
>> 1602 clean: rm-dirs := $(MODVERDIR)
>> 1603 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1804 1604
1805 PHONY += help 1605 PHONY += help
1806 help: 1606 help:
1807 @echo ' Building external modules.' 1607 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1608 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1609 @echo ''
1810 @echo ' modules - default t 1610 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1611 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1612 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1613 @echo ''
1815 1614
1816 ifndef CONFIG_MODULES !! 1615 PHONY += prepare
1817 modules modules_install: __external_modules_e !! 1616 prepare:
1818 __external_modules_error: !! 1617 $(cmd_crmodverdir)
1819 @echo >&2 '***' <<
1820 @echo >&2 '*** The present kernel dis <<
1821 @echo >&2 '*** You cannot build or in <<
1822 @echo >&2 '***' <<
1823 @false <<
1824 endif <<
1825 <<
1826 endif # KBUILD_EXTMOD 1618 endif # KBUILD_EXTMOD
1827 1619
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) 1620 clean: $(clean-dirs)
>> 1621 $(call cmd,rmdirs)
1934 $(call cmd,rmfiles) 1622 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1623 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name !! 1624 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ 1625 -o -name '*.ko.*' \
1938 -o -name '*.dtb' -o -name '*. !! 1626 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1939 -o -name '*.dtb.S' -o -name ' <<
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. 1627 -o -name '*.dwo' -o -name '*.lst' \
1942 -o -name '*.su' -o -name '*.m !! 1628 -o -name '*.su' \
1943 -o -name '.*.d' -o -name '.*. 1629 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' 1630 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945 -o -name '*.asn1.[ch]' \ 1631 -o -name '*.asn1.[ch]' \
1946 -o -name '*.symtypes' -o -nam 1632 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1633 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1947 -o -name '*.c.[012]*.*' \ 1634 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 1635 -o -name '*.ll' \
1949 -o -name '*.gcno' \ !! 1636 -o -name '*.gcno' \) -type f -print | xargs rm -f
1950 -o -name '*.*.symversions' \) <<
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 1637
1954 # Generate tags for editors 1638 # Generate tags for editors
1955 # ------------------------------------------- 1639 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 1640 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t !! 1641 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1958 1642
1959 tags TAGS cscope gtags: FORCE 1643 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 1644 $(call cmd,tags)
1961 1645
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(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 1646 # Scripts to check various things for consistency
2006 # ------------------------------------------- 1647 # ---------------------------------------------------------------------------
2007 1648
2008 PHONY += includecheck versioncheck coccicheck !! 1649 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2009 1650
2010 includecheck: 1651 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1652 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 1653 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 1654 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 1655
2015 versioncheck: 1656 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1657 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 1658 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 1659 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 1660
2020 coccicheck: 1661 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ !! 1662 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
>> 1663
>> 1664 namespacecheck:
>> 1665 $(PERL) $(srctree)/scripts/namespace.pl
2022 1666
2023 export_report: 1667 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 1668 $(PERL) $(srctree)/scripts/export_report.pl
2025 1669
2026 PHONY += checkstack kernelrelease kernelversi 1670 PHONY += checkstack kernelrelease kernelversion image_name
2027 1671
2028 # UML needs a little special treatment here. 1672 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 1673 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 1674 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 1675 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 1676 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 1677 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 1678 else
2035 CHECKSTACK_ARCH := $(ARCH) 1679 CHECKSTACK_ARCH := $(ARCH)
2036 endif 1680 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 1681 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 1682 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 1683 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 1684
2042 kernelrelease: 1685 kernelrelease:
2043 @$(filechk_kernel.release) !! 1686 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044 1687
2045 kernelversion: 1688 kernelversion:
2046 @echo $(KERNELVERSION) 1689 @echo $(KERNELVERSION)
2047 1690
2048 image_name: 1691 image_name:
2049 @echo $(KBUILD_IMAGE) 1692 @echo $(KBUILD_IMAGE)
2050 1693
2051 PHONY += run-command !! 1694 # Clear a bunch of variables before executing the submake
2052 run-command: !! 1695 tools/: FORCE
2053 $(Q)$(KBUILD_RUN_COMMAND) !! 1696 $(Q)mkdir -p $(objtree)/tools
>> 1697 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
>> 1698
>> 1699 tools/%: FORCE
>> 1700 $(Q)mkdir -p $(objtree)/tools
>> 1701 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
>> 1702
>> 1703 # Single targets
>> 1704 # ---------------------------------------------------------------------------
>> 1705 # Single targets are compatible with:
>> 1706 # - build with mixed source and output
>> 1707 # - build with separate output dir 'make O=...'
>> 1708 # - external modules
>> 1709 #
>> 1710 # target-dir => where to store outputfile
>> 1711 # build-dir => directory in kernel source tree to use
>> 1712
>> 1713 ifeq ($(KBUILD_EXTMOD),)
>> 1714 build-dir = $(patsubst %/,%,$(dir $@))
>> 1715 target-dir = $(dir $@)
>> 1716 else
>> 1717 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
>> 1718 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
>> 1719 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
>> 1720 endif
>> 1721
>> 1722 %.s: %.c prepare FORCE
>> 1723 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1724 %.i: %.c prepare FORCE
>> 1725 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1726 %.o: %.c prepare FORCE
>> 1727 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1728 %.lst: %.c prepare FORCE
>> 1729 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1730 %.s: %.S prepare FORCE
>> 1731 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1732 %.o: %.S prepare FORCE
>> 1733 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1734 %.symtypes: %.c prepare FORCE
>> 1735 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1736 %.ll: %.c prepare FORCE
>> 1737 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1738
>> 1739 # Modules
>> 1740 /: prepare FORCE
>> 1741 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1742 $(build)=$(build-dir)
>> 1743 # Make sure the latest headers are built for Documentation
>> 1744 Documentation/ samples/: headers_install
>> 1745 %/: prepare FORCE
>> 1746 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1747 $(build)=$(build-dir)
>> 1748 %.ko: prepare FORCE
>> 1749 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1750 $(build)=$(build-dir) $(@:.ko=.o)
>> 1751 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
>> 1752
>> 1753 # FIXME Should go into a make.lib or something
>> 1754 # ===========================================================================
>> 1755
>> 1756 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
>> 1757 cmd_rmdirs = rm -rf $(rm-dirs)
2054 1758
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1759 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) !! 1760 cmd_rmfiles = rm -f $(rm-files)
>> 1761
>> 1762 # Run depmod only if we have System.map and depmod is executable
>> 1763 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
>> 1764 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1765 $(KERNELRELEASE)
>> 1766
>> 1767 # Create temporary dir for module support files
>> 1768 # clean it up only when building all modules
>> 1769 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
>> 1770 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
2057 1771
2058 # read saved command lines for existing targe 1772 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe 1773 existing-targets := $(wildcard $(sort $(targets)))
2060 1774
2061 -include $(foreach f,$(existing-targets),$(di !! 1775 cmd_files := $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062 !! 1776 $(cmd_files): ; # Do not try to update included dependency files
2063 endif # config-build !! 1777 -include $(cmd_files)
2064 endif # mixed-build !! 1778
2065 endif # need-sub-make !! 1779 endif # ifeq ($(config-targets),1)
>> 1780 endif # ifeq ($(mixed-targets),1)
>> 1781 endif # need-sub-make
2066 1782
2067 PHONY += FORCE 1783 PHONY += FORCE
2068 FORCE: 1784 FORCE:
2069 1785
2070 # Declare the contents of the PHONY variable 1786 # Declare the contents of the PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 1787 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 1788 .PHONY: $(PHONY)
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.