1 # SPDX-License-Identifier: GPL-2.0 !! 1 VERSION = 4
2 VERSION = 6 !! 2 PATCHLEVEL = 9
3 PATCHLEVEL = 11 !! 3 SUBLEVEL = 337
4 SUBLEVEL = 5 <<
5 EXTRAVERSION = 4 EXTRAVERSION =
6 NAME = Baby Opossum Posse !! 5 NAME = Roaring Lionus
7 6
8 # *DOCUMENTATION* 7 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 8 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 9 # More info can be located in ./README
11 # Comments in this file are targeted only to t 10 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 11 # expect to learn how to build the kernel reading this file.
13 12
14 ifeq ($(filter output-sync,$(.FEATURES)),) !! 13 # o Do not use make's built-in rules and variables
15 $(error GNU Make >= 4.0 is required. Your Make !! 14 # (this increases performance and avoids hard-to-debug behaviour);
16 endif !! 15 # o Look for make include files relative to root of kernel src
>> 16 MAKEFLAGS += -rR --include-dir=$(CURDIR)
17 17
18 $(if $(filter __%, $(MAKECMDGOALS)), \ !! 18 # Avoid funny character set dependencies
19 $(error targets prefixed with '__' are !! 19 unexport LC_ALL
>> 20 LC_COLLATE=C
>> 21 LC_NUMERIC=C
>> 22 export LC_COLLATE LC_NUMERIC
20 23
21 # That's our default target when none is given !! 24 # Avoid interference with shell env settings
22 PHONY := __all !! 25 unexport GREP_OPTIONS
23 __all: <<
24 26
25 # We are using a recursive build, so we need t 27 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 28 # to get the ordering right.
27 # 29 #
28 # Most importantly: sub-Makefiles should only 30 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 31 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen 32 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.a targ !! 33 # unavoidable when linking the built-in.o targets which finally
32 # turn into vmlinux), we will call a sub make 34 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 35 # after that we are sure that everything which is in that other dir
34 # is now up to date. 36 # is now up to date.
35 # 37 #
36 # The only cases where we need to modify files 38 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 39 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 40 # descending is started. They are now explicitly listed as the
39 # prepare rule. 41 # prepare rule.
40 42
41 this-makefile := $(lastword $(MAKEFILE_LIST)) <<
42 abs_srctree := $(realpath $(dir $(this-makefil <<
43 abs_objtree := $(CURDIR) <<
44 <<
45 ifneq ($(sub_make_done),1) <<
46 <<
47 # Do not use make's built-in rules and variabl <<
48 # (this increases performance and avoids hard- <<
49 MAKEFLAGS += -rR <<
50 <<
51 # Avoid funny character set dependencies <<
52 unexport LC_ALL <<
53 LC_COLLATE=C <<
54 LC_NUMERIC=C <<
55 export LC_COLLATE LC_NUMERIC <<
56 <<
57 # Avoid interference with shell env settings <<
58 unexport GREP_OPTIONS <<
59 <<
60 # Beautify output 43 # Beautify output
61 # -------------------------------------------- 44 # ---------------------------------------------------------------------------
62 # 45 #
63 # Most of build commands in Kbuild start with !! 46 # Normally, we echo the whole command before executing it. By making
64 # "quiet_cmd_*". If defined, the short log is !! 47 # that echo $($(quiet)$(cmd)), we now have the possibility to set
65 # that command is printed by default. !! 48 # $(quiet) to choose other forms of output instead, e.g.
66 # !! 49 #
67 # e.g.) !! 50 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) !! 51 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
69 # cmd_depmod = $(srctree)/scripts/dep !! 52 #
>> 53 # If $(quiet) is empty, the whole command will be printed.
>> 54 # If it is set to "quiet_", only the short version will be printed.
>> 55 # If it is set to "silent_", nothing will be printed at all, since
>> 56 # the variable $(silent_cmd_cc_o_c) doesn't exist.
70 # 57 #
71 # A simple variant is to prefix commands with 58 # A simple variant is to prefix commands with $(Q) - that's useful
72 # for commands that shall be hidden in non-ver 59 # for commands that shall be hidden in non-verbose mode.
73 # 60 #
74 # $(Q)$(MAKE) $(build)=scripts/basic !! 61 # $(Q)ln $@ :<
75 # 62 #
76 # If KBUILD_VERBOSE contains 1, the whole comm !! 63 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
77 # If KBUILD_VERBOSE contains 2, the reason for !! 64 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
78 # 65 #
79 # To put more focus on warnings, be less verbo 66 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 67 # Use 'make V=1' to see the full commands
81 68
82 ifeq ("$(origin V)", "command line") 69 ifeq ("$(origin V)", "command line")
83 KBUILD_VERBOSE = $(V) 70 KBUILD_VERBOSE = $(V)
84 endif 71 endif
>> 72 ifndef KBUILD_VERBOSE
>> 73 KBUILD_VERBOSE = 0
>> 74 endif
85 75
86 quiet = quiet_ !! 76 ifeq ($(KBUILD_VERBOSE),1)
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = 77 quiet =
91 Q = 78 Q =
>> 79 else
>> 80 quiet=quiet_
>> 81 Q = @
92 endif 82 endif
93 83
94 # If the user is running make -s (silent mode) 84 # If the user is running make -s (silent mode), suppress echoing of
95 # commands 85 # commands
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS <<
97 quiet=silent_ <<
98 override KBUILD_VERBOSE := <<
99 endif <<
100 <<
101 export quiet Q KBUILD_VERBOSE <<
102 86
103 # Call a source code checker (by default, "spa !! 87 ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
104 # C compilation. !! 88 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
105 # !! 89 quiet=silent_
106 # Use 'make C=1' to enable checking of only re !! 90 tools_silent=s
107 # Use 'make C=2' to enable checking of *all* s !! 91 endif
108 # of whether they are re-compiled or not. !! 92 else # make-3.8x
109 # !! 93 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
110 # See the file "Documentation/dev-tools/sparse !! 94 quiet=silent_
111 # including where to get the "sparse" utility. !! 95 tools_silent=-s
112 <<
113 ifeq ("$(origin C)", "command line") <<
114 KBUILD_CHECKSRC = $(C) <<
115 endif 96 endif
116 ifndef KBUILD_CHECKSRC <<
117 KBUILD_CHECKSRC = 0 <<
118 endif 97 endif
119 98
120 export KBUILD_CHECKSRC !! 99 export quiet Q KBUILD_VERBOSE
121 <<
122 # Enable "clippy" (a linter) as part of the Ru <<
123 # <<
124 # Use 'make CLIPPY=1' to enable it. <<
125 ifeq ("$(origin CLIPPY)", "command line") <<
126 KBUILD_CLIPPY := $(CLIPPY) <<
127 endif <<
128 <<
129 export KBUILD_CLIPPY <<
130 <<
131 # Use make M=dir or set the environment variab <<
132 # directory of external module to build. Setti <<
133 ifeq ("$(origin M)", "command line") <<
134 KBUILD_EXTMOD := $(M) <<
135 endif <<
136 <<
137 $(if $(word 2, $(KBUILD_EXTMOD)), \ <<
138 $(error building multiple external mod <<
139 <<
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI <<
141 $(error module directory path cannot c <<
142 <<
143 # Remove trailing slashes <<
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),) <<
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM <<
146 endif <<
147 <<
148 export KBUILD_EXTMOD <<
149 <<
150 # backward compatibility <<
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC <<
152 <<
153 ifeq ("$(origin W)", "command line") <<
154 KBUILD_EXTRA_WARN := $(W) <<
155 endif <<
156 <<
157 export KBUILD_EXTRA_WARN <<
158 100
159 # Kbuild will save output files in the current !! 101 # kbuild supports saving output files in a separate directory.
160 # This does not need to match to the root of t !! 102 # To locate output files in a separate directory two syntaxes are supported.
161 # !! 103 # In both cases the working directory must be the root of the kernel src.
162 # For example, you can do this: <<
163 # <<
164 # cd /dir/to/store/output/files; make -f /dir <<
165 # <<
166 # If you want to save output files in a differ <<
167 # two syntaxes to specify it. <<
168 # <<
169 # 1) O= 104 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 105 # Use "make O=dir/to/store/output/files/"
171 # 106 #
172 # 2) Set KBUILD_OUTPUT 107 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t !! 108 # Set the environment variable KBUILD_OUTPUT to point to the directory
174 # export KBUILD_OUTPUT=dir/to/store/output/fil !! 109 # where the output files shall be placed.
>> 110 # export KBUILD_OUTPUT=dir/to/store/output/files/
>> 111 # make
175 # 112 #
176 # The O= assignment takes precedence over the 113 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable. 114 # variable.
178 115
179 # Do we want to change the working directory? !! 116 # KBUILD_SRC is set on invocation of make in OBJ directory
>> 117 # KBUILD_SRC is not intended to be used by the regular user (for now)
>> 118 ifeq ($(KBUILD_SRC),)
>> 119
>> 120 # OK, Make called in directory where kernel src resides
>> 121 # Do we want to locate output files in a separate directory?
180 ifeq ("$(origin O)", "command line") 122 ifeq ("$(origin O)", "command line")
181 KBUILD_OUTPUT := $(O) 123 KBUILD_OUTPUT := $(O)
182 endif 124 endif
183 125
184 ifneq ($(KBUILD_OUTPUT),) !! 126 # That's our default target when none is given on the command line
185 # $(realpath ...) gets empty if the path does !! 127 PHONY := _all
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") !! 128 _all:
187 # $(realpath ...) resolves symlinks <<
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) <<
189 $(if $(abs_objtree),,$(error failed to create <<
190 endif # ifneq ($(KBUILD_OUTPUT),) <<
191 <<
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 <<
193 $(error source directory cannot contain spaces <<
194 endif <<
195 <<
196 export sub_make_done := 1 <<
197 129
198 endif # sub_make_done !! 130 # Cancel implicit rules on top Makefile
>> 131 $(CURDIR)/Makefile Makefile: ;
199 132
200 ifeq ($(abs_objtree),$(CURDIR)) !! 133 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
201 # Suppress "Entering directory ..." if we are !! 134 $(error main directory cannot contain spaces nor colons)
202 no-print-directory := --no-print-directory <<
203 else <<
204 # Recursion to show "Entering directory ..." <<
205 need-sub-make := 1 <<
206 endif 135 endif
207 136
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 137 ifneq ($(KBUILD_OUTPUT),)
209 # If --no-print-directory is unset, recurse on !! 138 # Invoke a second make in the output directory, passing relevant variables
210 # You may end up recursing into __sub-make twi !! 139 # check that the output directory actually exists
211 # behavior change in GNU Make 4.4.1. !! 140 saved-output := $(KBUILD_OUTPUT)
212 need-sub-make := 1 !! 141 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
213 endif !! 142 && /bin/pwd)
214 !! 143 $(if $(KBUILD_OUTPUT),, \
215 ifeq ($(need-sub-make),1) !! 144 $(error failed to create output directory "$(saved-output)"))
216 145
217 PHONY += $(MAKECMDGOALS) __sub-make !! 146 PHONY += $(MAKECMDGOALS) sub-make
218 147
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 148 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
220 @: 149 @:
221 150
222 # Invoke a second make in the output directory !! 151 sub-make:
223 __sub-make: !! 152 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 153 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
225 -f $(abs_srctree)/Makefile $(MAKECMDGO <<
226 154
227 else # need-sub-make !! 155 # Leave processing to above invocation of make
>> 156 skip-makefile := 1
>> 157 endif # ifneq ($(KBUILD_OUTPUT),)
>> 158 endif # ifeq ($(KBUILD_SRC),)
228 159
229 # We process the rest of the Makefile if this 160 # We process the rest of the Makefile if this is the final invocation of make
>> 161 ifeq ($(skip-makefile),)
230 162
231 ifeq ($(abs_srctree),$(abs_objtree)) !! 163 # Do not print "Entering directory ...",
232 # building in the source tree !! 164 # but we want to display it when entering to the output directory
233 srctree := . !! 165 # so that IDEs/editors are able to understand relative filenames.
234 building_out_of_srctree := !! 166 MAKEFLAGS += --no-print-directory
235 else <<
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt <<
237 # building in a subdirectory o <<
238 srctree := .. <<
239 else <<
240 srctree := $(abs_srctree) <<
241 endif <<
242 building_out_of_srctree := 1 <<
243 endif <<
244 <<
245 ifneq ($(KBUILD_ABS_SRCTREE),) <<
246 srctree := $(abs_srctree) <<
247 endif <<
248 <<
249 objtree := . <<
250 167
251 VPATH := !! 168 # Call a source code checker (by default, "sparse") as part of the
>> 169 # C compilation.
>> 170 #
>> 171 # Use 'make C=1' to enable checking of only re-compiled files.
>> 172 # Use 'make C=2' to enable checking of *all* source files, regardless
>> 173 # of whether they are re-compiled or not.
>> 174 #
>> 175 # See the file "Documentation/sparse.txt" for more details, including
>> 176 # where to get the "sparse" utility.
252 177
253 ifeq ($(KBUILD_EXTMOD),) !! 178 ifeq ("$(origin C)", "command line")
254 ifdef building_out_of_srctree !! 179 KBUILD_CHECKSRC = $(C)
255 VPATH := $(srctree) <<
256 endif <<
257 endif 180 endif
258 !! 181 ifndef KBUILD_CHECKSRC
259 export building_out_of_srctree srctree objtree !! 182 KBUILD_CHECKSRC = 0
260 <<
261 # To make sure we do not include .config for a <<
262 # catch them early, and hand them over to scri <<
263 # It is allowed to specify more targets when c <<
264 # mixing *config targets and build targets. <<
265 # For example 'make oldconfig all'. <<
266 # Detect when mixed targets is specified, and <<
267 # of make so .config is not included in this c <<
268 <<
269 version_h := include/generated/uapi/linux/vers <<
270 <<
271 clean-targets := %clean mrproper cleandocs <<
272 no-dot-config-targets := $(clean-targets) \ <<
273 cscope gtags TAGS tag <<
274 $(version_h) headers <<
275 %asm-generic kernelve <<
276 outputmakefile rustav <<
277 no-sync-config-targets := $(no-dot-config-targ <<
278 image_name <<
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls <<
280 <<
281 config-build := <<
282 mixed-build := <<
283 need-config := 1 <<
284 may-sync-config := 1 <<
285 single-build := <<
286 <<
287 ifneq ($(filter $(no-dot-config-targets), $(MA <<
288 ifeq ($(filter-out $(no-dot-config-targets <<
289 need-config := <<
290 endif <<
291 endif 183 endif
292 184
293 ifneq ($(filter $(no-sync-config-targets), $(M !! 185 # Use make M=dir to specify directory of external module to build
294 ifeq ($(filter-out $(no-sync-config-target !! 186 # Old syntax make ... SUBDIRS=$PWD is still supported
295 may-sync-config := !! 187 # Setting the environment variable KBUILD_EXTMOD take precedence
296 endif !! 188 ifdef SUBDIRS
>> 189 KBUILD_EXTMOD ?= $(SUBDIRS)
297 endif 190 endif
298 191
299 need-compiler := $(may-sync-config) !! 192 ifeq ("$(origin M)", "command line")
300 !! 193 KBUILD_EXTMOD := $(M)
301 ifneq ($(KBUILD_EXTMOD),) <<
302 may-sync-config := <<
303 endif 194 endif
304 195
>> 196 # If building an external module we do not care about the all: rule
>> 197 # but instead _all depend on modules
>> 198 PHONY += all
305 ifeq ($(KBUILD_EXTMOD),) 199 ifeq ($(KBUILD_EXTMOD),)
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 200 _all: all
307 config-build := 1 !! 201 else
308 ifneq ($(words $(MAKECMDGOALS)),1) !! 202 _all: modules
309 mixed-build := 1 <<
310 endif <<
311 endif <<
312 endif <<
313 <<
314 # We cannot build single targets and the other <<
315 ifneq ($(filter $(single-targets), $(MAKECMDGO <<
316 single-build := 1 <<
317 ifneq ($(filter-out $(single-targets), $(M <<
318 mixed-build := 1 <<
319 endif <<
320 endif <<
321 <<
322 # For "make -j clean all", "make -j mrproper d <<
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL <<
324 ifneq ($(filter-out $(clean-targets),$(MAK <<
325 mixed-build := 1 <<
326 endif <<
327 endif 203 endif
328 204
329 # install and modules_install need also be pro !! 205 ifeq ($(KBUILD_SRC),)
330 ifneq ($(filter install,$(MAKECMDGOALS)),) !! 206 # building in the source tree
331 ifneq ($(filter modules_install,$(MAKECMDG !! 207 srctree := .
332 mixed-build := 1 !! 208 else
333 endif !! 209 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
>> 210 # building in a subdirectory of the source tree
>> 211 srctree := ..
>> 212 else
>> 213 srctree := $(KBUILD_SRC)
>> 214 endif
334 endif 215 endif
>> 216 objtree := .
>> 217 src := $(srctree)
>> 218 obj := $(objtree)
335 219
336 ifdef mixed-build !! 220 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
337 # ============================================ <<
338 # We're called with mixed targets (*config and <<
339 # Handle them one by one. <<
340 <<
341 PHONY += $(MAKECMDGOALS) __build_one_by_one <<
342 <<
343 $(MAKECMDGOALS): __build_one_by_one <<
344 @: <<
345 <<
346 __build_one_by_one: <<
347 $(Q)set -e; \ <<
348 for i in $(MAKECMDGOALS); do \ <<
349 $(MAKE) -f $(srctree)/Makefile <<
350 done <<
351 <<
352 else # !mixed-build <<
353 221
354 include $(srctree)/scripts/Kbuild.include !! 222 export srctree objtree VPATH
355 223
356 # Read KERNELRELEASE from include/config/kerne !! 224 # SUBARCH tells the usermode build what the underlying arch is. That is set
357 KERNELRELEASE = $(call read-file, include/conf !! 225 # first, and if a usermode build is happening, the "ARCH=um" on the command
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. !! 226 # line overrides the setting of ARCH below. If a native build is happening,
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA !! 227 # then ARCH is assigned, getting whatever value it gets normally, and
360 !! 228 # SUBARCH is subsequently ignored.
361 include $(srctree)/scripts/subarch.include !! 229
>> 230 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
>> 231 -e s/sun4u/sparc64/ \
>> 232 -e s/arm.*/arm/ -e s/sa110/arm/ \
>> 233 -e s/s390x/s390/ -e s/parisc64/parisc/ \
>> 234 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
>> 235 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
362 236
363 # Cross compiling and selecting different set 237 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 238 # ---------------------------------------------------------------------------
365 # 239 #
366 # When performing cross compilation for other 240 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 241 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 242 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 243 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 244 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 245 # The default ARCH is the host where make is executed.
372 246
373 # CROSS_COMPILE specify the prefix used for al 247 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 248 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 249 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 250 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 251 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 252 # Alternatively CROSS_COMPILE can be set in the environment.
>> 253 # A third alternative is to store a setting in .config so that plain
>> 254 # "make" in the configured kernel build directory always uses that.
379 # Default value for CROSS_COMPILE is not to pr 255 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 256 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH ?= $(SUBARCH) 257 ARCH ?= $(SUBARCH)
>> 258 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
382 259
383 # Architecture as present in compile.h 260 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) 261 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) 262 SRCARCH := $(ARCH)
386 263
387 # Additional ARCH settings for x86 264 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386) 265 ifeq ($(ARCH),i386)
389 SRCARCH := x86 266 SRCARCH := x86
390 endif 267 endif
391 ifeq ($(ARCH),x86_64) 268 ifeq ($(ARCH),x86_64)
392 SRCARCH := x86 269 SRCARCH := x86
393 endif 270 endif
394 271
395 # Additional ARCH settings for sparc 272 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32) 273 ifeq ($(ARCH),sparc32)
397 SRCARCH := sparc 274 SRCARCH := sparc
398 endif 275 endif
399 ifeq ($(ARCH),sparc64) 276 ifeq ($(ARCH),sparc64)
400 SRCARCH := sparc 277 SRCARCH := sparc
401 endif 278 endif
402 279
403 # Additional ARCH settings for parisc !! 280 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64) !! 281 ifeq ($(ARCH),sh64)
405 SRCARCH := parisc !! 282 SRCARCH := sh
406 endif 283 endif
407 284
408 export cross_compiling := !! 285 # Additional ARCH settings for tile
409 ifneq ($(SRCARCH),$(SUBARCH)) !! 286 ifeq ($(ARCH),tilepro)
410 cross_compiling := 1 !! 287 SRCARCH := tile
411 endif 288 endif
>> 289 ifeq ($(ARCH),tilegx)
>> 290 SRCARCH := tile
>> 291 endif
>> 292
>> 293 # Where to locate arch specific headers
>> 294 hdr-arch := $(SRCARCH)
412 295
413 KCONFIG_CONFIG ?= .config 296 KCONFIG_CONFIG ?= .config
414 export KCONFIG_CONFIG 297 export KCONFIG_CONFIG
415 298
416 # SHELL used by kbuild 299 # SHELL used by kbuild
417 CONFIG_SHELL := sh !! 300 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
>> 301 else if [ -x /bin/bash ]; then echo /bin/bash; \
>> 302 else echo sh; fi ; fi)
>> 303
>> 304 HOSTCC = gcc
>> 305 HOSTCXX = g++
>> 306 HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
>> 307 HOSTCXXFLAGS = -O2
418 308
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS !! 309 # Decide whether to build built-in, modular, or both.
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG !! 310 # Normally, just do built-in.
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d !! 311
>> 312 KBUILD_MODULES :=
>> 313 KBUILD_BUILTIN := 1
422 314
423 ifneq ($(LLVM),) !! 315 # If we have only "make modules", don't compile built-in objects.
424 ifneq ($(filter %/,$(LLVM)),) !! 316 ifeq ($(MAKECMDGOALS),modules)
425 LLVM_PREFIX := $(LLVM) !! 317 KBUILD_BUILTIN :=
426 else ifneq ($(filter -%,$(LLVM)),) <<
427 LLVM_SUFFIX := $(LLVM) <<
428 endif 318 endif
429 319
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) !! 320 # If we have "make <whatever> modules", compile modules
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) !! 321 # in addition to whatever we do anyway.
432 else !! 322 # Just "make" or "make all" shall build modules as well
433 HOSTCC = gcc !! 323
434 HOSTCXX = g++ !! 324 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
>> 325 KBUILD_MODULES := 1
435 endif 326 endif
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config <<
438 327
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 328 ifeq ($(MAKECMDGOALS),)
440 -O2 -fomit-frame-poin !! 329 KBUILD_MODULES := 1
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) !! 330 endif
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) !! 331
443 !! 332 export KBUILD_MODULES KBUILD_BUILTIN
444 # These flags apply to all Rust code in the tr !! 333 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
445 # host programs. !! 334
446 export rust_common_flags := --edition=2021 \ !! 335 # We need some generic definitions (do not try to remake the file).
447 -Zbinary_dep_depin !! 336 scripts/Kbuild.include: ;
448 -Astable_features !! 337 include scripts/Kbuild.include
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 <<
469 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOST <<
470 338
471 # Make variables (CC, etc...) 339 # Make variables (CC, etc...)
472 CPP = $(CC) -E !! 340 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 341 LD = $(CROSS_COMPILE)ld
>> 342 CC = $(CROSS_COMPILE)gcc
>> 343 CPP = $(CC) -E
485 AR = $(CROSS_COMPILE)ar 344 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 345 NM = $(CROSS_COMPILE)nm
>> 346 STRIP = $(CROSS_COMPILE)strip
487 OBJCOPY = $(CROSS_COMPILE)objcopy 347 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 348 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 <<
500 YACC = bison <<
501 AWK = awk 349 AWK = awk
>> 350 GENKSYMS = scripts/genksyms/genksyms
502 INSTALLKERNEL := installkernel 351 INSTALLKERNEL := installkernel
>> 352 DEPMOD = depmod
503 PERL = perl 353 PERL = perl
504 PYTHON3 = python3 !! 354 PYTHON = python
505 CHECK = sparse 355 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 <<
514 356
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC 357 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516 -Wbitwise -Wno-return-void - !! 358 -Wbitwise -Wno-return-void $(CF)
517 NOSTDINC_FLAGS := !! 359 NOSTDINC_FLAGS =
518 CFLAGS_MODULE = 360 CFLAGS_MODULE =
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = 361 AFLAGS_MODULE =
521 LDFLAGS_MODULE = 362 LDFLAGS_MODULE =
522 CFLAGS_KERNEL = 363 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 364 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = 365 LDFLAGS_vmlinux =
526 366
527 # Use USERINCLUDE when you must reference the 367 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE := \ 368 USERINCLUDE := \
529 -I$(srctree)/arch/$(SRCARCH)/i !! 369 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
530 -I$(objtree)/arch/$(SRCARCH)/i !! 370 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
531 -I$(srctree)/include/uapi \ 371 -I$(srctree)/include/uapi \
532 -I$(objtree)/include/generated 372 -I$(objtree)/include/generated/uapi \
533 -include $(srctree)/include/li <<
534 -include $(srctree)/include/li 373 -include $(srctree)/include/linux/kconfig.h
535 374
536 # Use LINUXINCLUDE when you must reference the 375 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option 376 # Needed to be compatible with the O= option
538 LINUXINCLUDE := \ 377 LINUXINCLUDE := \
539 -I$(srctree)/arch/$(SRCARCH)/i !! 378 -I$(srctree)/arch/$(hdr-arch)/include \
540 -I$(objtree)/arch/$(SRCARCH)/i !! 379 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
541 $(if $(building_out_of_srctree !! 380 -I$(objtree)/arch/$(hdr-arch)/include/generated \
542 -I$(objtree)/include \ !! 381 $(if $(KBUILD_SRC), -I$(srctree)/include) \
543 $(USERINCLUDE) !! 382 -I$(objtree)/include
544 !! 383
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE !! 384 LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))
546 !! 385
547 KBUILD_CFLAGS := !! 386 KBUILD_AFLAGS := -D__ASSEMBLY__
548 KBUILD_CFLAGS += -std=gnu11 !! 387 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
549 KBUILD_CFLAGS += -fshort-wchar !! 388 -fno-strict-aliasing -fno-common -fshort-wchar \
550 KBUILD_CFLAGS += -funsigned-char !! 389 -Werror-implicit-function-declaration \
551 KBUILD_CFLAGS += -fno-common !! 390 -Wno-format-security \
552 KBUILD_CFLAGS += -fno-PIE !! 391 -std=gnu89
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ 392 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 := 393 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL := 394 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE 395 KBUILD_AFLAGS_MODULE := -DMODULE
568 KBUILD_CFLAGS_MODULE := -DMODULE 396 KBUILD_CFLAGS_MODULE := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE !! 397 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
570 KBUILD_LDFLAGS_MODULE := !! 398 GCC_PLUGINS_CFLAGS :=
571 KBUILD_LDFLAGS := <<
572 CLANG_FLAGS := 399 CLANG_FLAGS :=
573 400
574 ifeq ($(KBUILD_CLIPPY),1) !! 401 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY !! 402 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) !! 403 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
577 else <<
578 RUSTC_OR_CLIPPY_QUIET := RUSTC <<
579 RUSTC_OR_CLIPPY = $(RUSTC) <<
580 endif <<
581 <<
582 ifdef RUST_LIB_SRC <<
583 export RUST_LIB_SRC <<
584 endif <<
585 <<
586 # Allows the usage of unstable features in sta <<
587 export RUSTC_BOOTSTRAP := 1 <<
588 404
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K !! 405 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q !! 406 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS !! 407 export CPP AR NM STRIP OBJCOPY OBJDUMP
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF !! 408 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ !! 409 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD <<
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS <<
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS <<
597 410
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC !! 411 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU 412 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 413 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU 414 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 415 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 416 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
>> 417 export KBUILD_ARFLAGS
>> 418
>> 419 # When compiling out-of-tree modules, put MODVERDIR in the module
>> 420 # tree rather than in the kernel tree. The kernel tree might
>> 421 # even be read-only.
>> 422 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
604 423
605 # Files to ignore in find ... statements 424 # Files to ignore in find ... statements
606 425
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na 426 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
608 -name CVS -o -name . 427 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609 -prune -o 428 -prune -o
>> 429 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
>> 430 --exclude CVS --exclude .pc --exclude .hg --exclude .git
610 431
611 # ============================================ 432 # ===========================================================================
612 # Rules shared between *config targets and bui 433 # Rules shared between *config targets and build targets
613 434
614 # Basic helpers built in scripts/basic/ !! 435 # Basic helpers built in scripts/
615 PHONY += scripts_basic 436 PHONY += scripts_basic
616 scripts_basic: 437 scripts_basic:
617 $(Q)$(MAKE) $(build)=scripts/basic 438 $(Q)$(MAKE) $(build)=scripts/basic
>> 439 $(Q)rm -f .tmp_quiet_recordmcount
>> 440
>> 441 # To avoid any implicit rule to kick in, define an empty command.
>> 442 scripts/basic/%: scripts_basic ;
618 443
619 PHONY += outputmakefile 444 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 445 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve 446 # separate output directory. This allows convenient use of make in the
624 # output directory. 447 # 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: 448 outputmakefile:
635 @if [ -f $(srctree)/.config -o \ !! 449 ifneq ($(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 450 $(Q)ln -fsn $(srctree) source
645 $(call cmd,makefile) !! 451 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
646 $(Q)test -e .gitignore || \ !! 452 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
647 { echo "# this is build directory, ign <<
648 endif 453 endif
649 454
650 # The expansion should be delayed until arch/$ !! 455 # Support for using generic headers in asm-generic
651 # Some architectures define CROSS_COMPILE in a !! 456 PHONY += asm-generic
652 # CC_VERSION_TEXT is referenced from Kconfig ( !! 457 asm-generic:
653 # and from include/config/auto.conf.cmd to det !! 458 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 459 src=asm obj=arch/$(SRCARCH)/include/generated/asm
>> 460 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
>> 461 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
>> 462
>> 463 # To make sure we do not include .config for any of the *config targets
>> 464 # catch them early, and hand them over to scripts/kconfig/Makefile
>> 465 # It is allowed to specify more targets when calling make, including
>> 466 # mixing *config targets and build targets.
>> 467 # For example 'make oldconfig all'.
>> 468 # Detect when mixed targets is specified, and make a second invocation
>> 469 # of make so .config is not included in this case either (for *config).
>> 470
>> 471 version_h := include/generated/uapi/linux/version.h
>> 472 old_version_h := include/linux/version.h
>> 473
>> 474 no-dot-config-targets := clean mrproper distclean \
>> 475 cscope gtags TAGS tags help% %docs check% coccicheck \
>> 476 $(version_h) headers_% archheaders archscripts \
>> 477 kernelversion %src-pkg
>> 478
>> 479 config-targets := 0
>> 480 mixed-targets := 0
>> 481 dot-config := 1
>> 482
>> 483 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
>> 484 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
>> 485 dot-config := 0
>> 486 endif
>> 487 endif
655 488
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), !! 489 ifeq ($(KBUILD_EXTMOD),)
657 include $(srctree)/scripts/Makefile.clang !! 490 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
>> 491 config-targets := 1
>> 492 ifneq ($(words $(MAKECMDGOALS)),1)
>> 493 mixed-targets := 1
>> 494 endif
>> 495 endif
>> 496 endif
>> 497 # install and module_install need also be processed one by one
>> 498 ifneq ($(filter install,$(MAKECMDGOALS)),)
>> 499 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
>> 500 mixed-targets := 1
>> 501 endif
658 endif 502 endif
659 503
660 # Include this also for config targets because !! 504 ifeq ($(cc-name),clang)
661 # cc-cross-prefix to determine CROSS_COMPILE. !! 505 ifneq ($(CROSS_COMPILE),)
662 ifdef need-compiler !! 506 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
663 include $(srctree)/scripts/Makefile.compiler !! 507 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
>> 508 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
>> 509 GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
>> 510 endif
>> 511 ifneq ($(GCC_TOOLCHAIN),)
>> 512 CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
664 endif 513 endif
>> 514 CLANG_FLAGS += -no-integrated-as
>> 515 CLANG_FLAGS += -Werror=unknown-warning-option
>> 516 KBUILD_CFLAGS += $(CLANG_FLAGS)
>> 517 KBUILD_AFLAGS += $(CLANG_FLAGS)
>> 518 endif
>> 519
>> 520
>> 521 ifeq ($(mixed-targets),1)
>> 522 # ===========================================================================
>> 523 # We're called with mixed targets (*config and build targets).
>> 524 # Handle them one by one.
>> 525
>> 526 PHONY += $(MAKECMDGOALS) __build_one_by_one
>> 527
>> 528 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
>> 529 @:
>> 530
>> 531 __build_one_by_one:
>> 532 $(Q)set -e; \
>> 533 for i in $(MAKECMDGOALS); do \
>> 534 $(MAKE) -f $(srctree)/Makefile $$i; \
>> 535 done
665 536
666 ifdef config-build !! 537 else
>> 538 ifeq ($(config-targets),1)
667 # ============================================ 539 # ===========================================================================
668 # *config targets only - make sure prerequisit 540 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe 541 # in scripts/kconfig to make the *config target
670 542
671 # Read arch-specific Makefile to set KBUILD_DE !! 543 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ 544 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig' 545 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile !! 546 include arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 547 export KBUILD_DEFCONFIG KBUILD_KCONFIG
676 548
677 config: outputmakefile scripts_basic FORCE !! 549 config: scripts_basic outputmakefile FORCE
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ 550 $(Q)$(MAKE) $(build)=scripts/kconfig $@
679 551
680 %config: outputmakefile scripts_basic FORCE !! 552 %config: scripts_basic outputmakefile FORCE
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ 553 $(Q)$(MAKE) $(build)=scripts/kconfig $@
682 554
683 else #!config-build !! 555 else
684 # ============================================ 556 # ===========================================================================
685 # Build targets only - this includes vmlinux, !! 557 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e 558 # targets and others. In general all targets except *config targets.
687 559
688 # If building an external module we do not car <<
689 # but instead __all depend on modules <<
690 PHONY += all <<
691 ifeq ($(KBUILD_EXTMOD),) 560 ifeq ($(KBUILD_EXTMOD),)
692 __all: all !! 561 # Additional helpers built in scripts/
693 else !! 562 # Carefully list dependencies so we do not try to build scripts twice
694 __all: modules !! 563 # in parallel
695 endif !! 564 PHONY += scripts
>> 565 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
>> 566 asm-generic gcc-plugins
>> 567 $(Q)$(MAKE) $(build)=$(@)
696 568
697 targets := !! 569 # Objects we will link into vmlinux / subdirs we need to visit
>> 570 init-y := init/
>> 571 drivers-y := drivers/ sound/ firmware/
>> 572 net-y := net/
>> 573 libs-y := lib/
>> 574 core-y := usr/
>> 575 virt-y := virt/
>> 576 endif # KBUILD_EXTMOD
698 577
699 # Decide whether to build built-in, modular, o !! 578 ifeq ($(dot-config),1)
700 # Normally, just do built-in. !! 579 # Read in config
>> 580 -include include/config/auto.conf
701 581
702 KBUILD_MODULES := !! 582 ifeq ($(KBUILD_EXTMOD),)
703 KBUILD_BUILTIN := 1 !! 583 # Read in dependencies to all Kconfig* files, make sure to run
>> 584 # oldconfig if changes are detected.
>> 585 -include include/config/auto.conf.cmd
>> 586
>> 587 # To avoid any implicit rule to kick in, define an empty command
>> 588 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
>> 589
>> 590 # If .config is newer than include/config/auto.conf, someone tinkered
>> 591 # with it and forgot to run make oldconfig.
>> 592 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
>> 593 # we execute the config step to be sure to catch updated Kconfig files
>> 594 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
>> 595 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
>> 596 else
>> 597 # external modules needs include/generated/autoconf.h and include/config/auto.conf
>> 598 # but do not care if they are up-to-date. Use auto.conf to trigger the test
>> 599 PHONY += include/config/auto.conf
704 600
705 # If we have only "make modules", don't compil !! 601 include/config/auto.conf:
706 ifeq ($(MAKECMDGOALS),modules) !! 602 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
707 KBUILD_BUILTIN := !! 603 echo >&2; \
708 endif !! 604 echo >&2 " ERROR: Kernel configuration is invalid."; \
>> 605 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
>> 606 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
>> 607 echo >&2 ; \
>> 608 /bin/false)
709 609
710 # If we have "make <whatever> modules", compil !! 610 endif # KBUILD_EXTMOD
711 # in addition to whatever we do anyway. <<
712 # Just "make" or "make all" shall build module <<
713 611
714 ifneq ($(filter all modules nsdeps %compile_co !! 612 else
715 KBUILD_MODULES := 1 !! 613 # Dummy target needed, because used as prerequisite
716 endif !! 614 include/config/auto.conf: ;
>> 615 endif # $(dot-config)
717 616
718 ifeq ($(MAKECMDGOALS),) !! 617 # For the kernel to actually contain only the needed exported symbols,
>> 618 # we have to build modules as well to determine what those symbols are.
>> 619 # (this can be evaluated only once include/config/auto.conf has been included)
>> 620 ifdef CONFIG_TRIM_UNUSED_KSYMS
719 KBUILD_MODULES := 1 621 KBUILD_MODULES := 1
720 endif 622 endif
721 623
722 export KBUILD_MODULES KBUILD_BUILTIN <<
723 <<
724 ifdef need-config <<
725 include include/config/auto.conf <<
726 endif <<
727 <<
728 ifeq ($(KBUILD_EXTMOD),) <<
729 # Objects we will link into vmlinux / subdirs <<
730 core-y := <<
731 drivers-y := <<
732 libs-y := lib/ <<
733 endif # KBUILD_EXTMOD <<
734 <<
735 # The all: target is the default when no targe 624 # The all: target is the default when no target is given on the
736 # command line. 625 # command line.
737 # This allow a user to issue only 'make' to bu 626 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u 627 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux 628 all: vmlinux
740 629
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover !! 630 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
742 ifdef CONFIG_CC_IS_GCC !! 631 KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
743 CFLAGS_GCOV += -fno-tree-loop-im !! 632 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
744 endif !! 633 CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
745 export CFLAGS_GCOV !! 634 export CFLAGS_GCOV CFLAGS_KCOV
>> 635
>> 636 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
>> 637 # values of the respective KBUILD_* variables
>> 638 ARCH_CPPFLAGS :=
>> 639 ARCH_AFLAGS :=
>> 640 ARCH_CFLAGS :=
>> 641 include arch/$(SRCARCH)/Makefile
>> 642
>> 643 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
>> 644 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
>> 645 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
>> 646 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
>> 647 KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
>> 648 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
>> 649 KBUILD_CFLAGS += $(call cc-disable-warning, attribute-alias)
746 650
747 # The arch Makefiles can override CC_FLAGS_FTR !! 651 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
748 ifdef CONFIG_FUNCTION_TRACER !! 652 KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
749 CC_FLAGS_FTRACE := -pg !! 653 KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
750 endif 654 endif
751 655
752 include $(srctree)/arch/$(SRCARCH)/Makefile !! 656 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
753 !! 657 KBUILD_CFLAGS += -Os
754 ifdef need-config !! 658 else
755 ifdef may-sync-config !! 659 KBUILD_CFLAGS += -O2
756 # Read in dependencies to all Kconfig* files, !! 660 endif
757 # changes are detected. This should be include <<
758 # because some architectures define CROSS_COMP <<
759 include include/config/auto.conf.cmd <<
760 <<
761 $(KCONFIG_CONFIG): <<
762 @echo >&2 '***' <<
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 <<
770 # The actual configuration files used during t <<
771 # include/generated/ and include/config/. Upda <<
772 # include/config/auto.conf (which mirrors .con <<
773 # <<
774 # This exploits the 'multi-target pattern rule <<
775 # The syncconfig should be executed only once <<
776 # (Note: use the grouped target '&:' when we b <<
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 <<
783 else # !may-sync-config <<
784 # External modules and some install targets ne <<
785 # and include/config/auto.conf but do not care <<
786 # Use auto.conf to trigger the test <<
787 PHONY += include/config/auto.conf <<
788 <<
789 include/config/auto.conf: <<
790 @test -e include/generated/autoconf.h <<
791 echo >&2; <<
792 echo >&2 " ERROR: Kernel configuratio <<
793 echo >&2 " include/generated/a <<
794 echo >&2 " Run 'make oldconfig <<
795 echo >&2 ; <<
796 /bin/false) <<
797 <<
798 endif # may-sync-config <<
799 endif # need-config <<
800 <<
801 KBUILD_CFLAGS += -fno-delete-null-pointer-ch <<
802 <<
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE <<
804 KBUILD_CFLAGS += -O2 <<
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 <<
815 661
816 # Tell gcc to never replace conditional load w 662 # 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 663 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow 664 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
>> 665
>> 666 # check for 'asm goto'
>> 667 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
>> 668 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
>> 669 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
822 endif 670 endif
823 671
>> 672 include scripts/Makefile.gcc-plugins
>> 673
824 ifdef CONFIG_READABLE_ASM 674 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li 675 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f 676 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio 677 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct 678 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 679 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
>> 680 $(call cc-option,-fno-ipa-cp-clone,) \
>> 681 $(call cc-option,-fno-partial-inlining)
830 endif 682 endif
831 683
832 stackp-flags-y !! 684 ifneq ($(CONFIG_FRAME_WARN),0)
833 stackp-flags-$(CONFIG_STACKPROTECTOR) !! 685 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) !! 686 endif
835 <<
836 KBUILD_CFLAGS += $(stackp-flags-y) <<
837 687
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 688 # This selects the stack protector compiler flag. Testing it is delayed
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) !! 689 # until after .config has been reprocessed, in the prepare-compiler-check
>> 690 # target.
>> 691 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
>> 692 stackp-flag := -fstack-protector
>> 693 stackp-name := REGULAR
>> 694 else
>> 695 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
>> 696 stackp-flag := -fstack-protector-strong
>> 697 stackp-name := STRONG
>> 698 else
>> 699 # Force off for distro compilers that enable stack protector by default.
>> 700 stackp-flag := $(call cc-option, -fno-stack-protector)
>> 701 endif
>> 702 endif
>> 703 # Find arch-specific stack protector compiler sanity-checking script.
>> 704 ifdef CONFIG_CC_STACKPROTECTOR
>> 705 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
>> 706 stackp-check := $(wildcard $(stackp-path))
>> 707 endif
>> 708 KBUILD_CFLAGS += $(stackp-flag)
>> 709
>> 710 ifeq ($(cc-name),clang)
>> 711 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
>> 712 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
>> 713 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
>> 714 # Quiet clang warning: comparison of unsigned expression < 0 is always false
>> 715 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
>> 716 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
>> 717 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>> 718 # See modpost pattern 2
>> 719 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
>> 720 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
>> 721 endif
>> 722
>> 723 # These warnings generated too much noise in a regular build.
>> 724 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
>> 725 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
840 726
>> 727 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
841 ifdef CONFIG_FRAME_POINTER 728 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn 729 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 730 else
845 # Some targets (ARM with Thumb2, for example), 731 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers. For those, we don't have FUNCTION 732 # pointers. For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER. However, FUNCTION_TRA 733 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with 734 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER. 735 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER 736 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS += -fomit-frame-pointer 737 KBUILD_CFLAGS += -fomit-frame-pointer
854 endif 738 endif
855 endif 739 endif
856 740
857 # Initialize all stack variables with a 0xAA p !! 741 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 <<
861 742
862 # Initialize all stack variables with a zero v !! 743 ifdef CONFIG_DEBUG_INFO
863 ifdef CONFIG_INIT_STACK_ALL_ZERO !! 744 ifdef CONFIG_DEBUG_INFO_SPLIT
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer !! 745 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 746 else
866 # https://github.com/llvm/llvm-project/issues/ !! 747 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 748 endif
>> 749 KBUILD_AFLAGS += -Wa,-gdwarf-2
>> 750 endif
>> 751 ifdef CONFIG_DEBUG_INFO_DWARF4
>> 752 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
871 endif 753 endif
872 754
873 # While VLAs have been removed, GCC produces u !! 755 ifdef CONFIG_DEBUG_INFO_REDUCED
874 # for the randomize_kstack_offset feature. Dis !! 756 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac !! 757 $(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 758 endif
881 759
882 ifdef CONFIG_FUNCTION_TRACER 760 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC !! 761 ifndef CC_FLAGS_FTRACE
884 CC_FLAGS_FTRACE += -mrecord-mcount !! 762 CC_FLAGS_FTRACE := -pg
885 ifdef CONFIG_HAVE_NOP_MCOUNT <<
886 ifeq ($(call cc-option-yn, -mnop-mcount),y <<
887 CC_FLAGS_FTRACE += -mnop-mcount <<
888 CC_FLAGS_USING += -DCC_USING_NOP_MCOU <<
889 endif <<
890 endif <<
891 endif 763 endif
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL !! 764 ifdef CONFIG_FTRACE_MCOUNT_RECORD
893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT !! 765 # gcc 5 supports generating the mcount tables directly
894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU !! 766 ifeq ($(call cc-option-yn,-mrecord-mcount),y)
895 endif !! 767 CC_FLAGS_FTRACE += -mrecord-mcount
896 endif !! 768 export CC_USING_RECORD_MCOUNT := 1
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 769 endif
902 endif 770 endif
>> 771 export CC_FLAGS_FTRACE
903 ifdef CONFIG_HAVE_FENTRY 772 ifdef CONFIG_HAVE_FENTRY
904 # s390-linux-gnu-gcc did not support -mfentr !! 773 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
905 ifeq ($(call cc-option-yn, -mfentry),y) !! 774 endif
906 CC_FLAGS_FTRACE += -mfentry !! 775 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
907 CC_FLAGS_USING += -DCC_USING_FENTRY !! 776 KBUILD_AFLAGS += $(CC_USING_FENTRY)
908 endif !! 777 ifdef CONFIG_DYNAMIC_FTRACE
>> 778 ifdef CONFIG_HAVE_C_RECORDMCOUNT
>> 779 BUILD_C_RECORDMCOUNT := y
>> 780 export BUILD_C_RECORDMCOUNT
>> 781 endif
909 endif 782 endif
910 export CC_FLAGS_FTRACE <<
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA <<
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) <<
913 endif 783 endif
914 784
915 # We trigger additional mismatches with less i 785 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH 786 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 787 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif 788 endif
919 789
920 # `rustc`'s `-Zfunction-sections` applies to d !! 790 # arch Makefile may override CC so keep this after arch Makefile is included
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION !! 791 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f !! 792 CHECKFLAGS += $(NOSTDINC_FLAGS)
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections <<
925 endif <<
926 793
927 ifdef CONFIG_SHADOW_CALL_STACK !! 794 # warn about C99 declaration after statement
928 ifndef CONFIG_DYNAMIC_SCS !! 795 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac <<
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) <<
931 endif <<
932 export CC_FLAGS_SCS <<
933 endif <<
934 796
935 ifdef CONFIG_LTO_CLANG !! 797 # disable pointer signed / unsigned warnings in gcc 4.0
936 ifdef CONFIG_LTO_CLANG_THIN !! 798 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit <<
938 else <<
939 CC_FLAGS_LTO := -flto <<
940 endif <<
941 CC_FLAGS_LTO += -fvisibility=hidden <<
942 799
943 # Limit inlining across translation units to r !! 800 # disable stringop warnings in gcc 8+
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 !! 801 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
945 endif <<
946 802
947 ifdef CONFIG_LTO !! 803 # We'll want to enable this eventually, but it's not going away for 5.7 at least
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) !! 804 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
949 KBUILD_AFLAGS += -fno-lto !! 805 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
950 export CC_FLAGS_LTO !! 806 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
951 endif <<
952 807
953 ifdef CONFIG_CFI_CLANG !! 808 # Another good warning that we'll want to enable eventually
954 CC_FLAGS_CFI := -fsanitize=kcfi !! 809 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) <<
956 export CC_FLAGS_CFI <<
957 endif <<
958 810
959 # Architectures can define flags to add/remove !! 811 # Enabled with W=2, disabled by default as noisy
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN !! 812 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 <<
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) <<
965 # Set the minimal function alignment. Use the <<
966 # -fmin-function-alignment if it is available, <<
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME <<
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT <<
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO <<
970 else <<
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
972 endif <<
973 endif <<
974 <<
975 # arch Makefile may override CC so keep this a <<
976 NOSTDINC_FLAGS += -nostdinc <<
977 <<
978 # To gain proper coverage for CONFIG_UBSAN_BOU <<
979 # the kernel uses only C99 flexible arrays for <<
980 # arrays. Enforce this for everything that may <<
981 # perform bounds checking. <<
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl <<
983 <<
984 #Currently, disable -Wstringop-overflow for GC <<
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW <<
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + <<
987 813
988 # disable invalid "can't wrap" optimizations f 814 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS += -fno-strict-overflow !! 815 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
>> 816
>> 817 # clang sets -fmerge-all-constants by default as optimization, but this
>> 818 # is non-conforming behavior for C and in fact breaks the kernel, so we
>> 819 # need to disable it here generally.
>> 820 KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
>> 821
>> 822 # for gcc -fno-merge-all-constants disables everything, but it is fine
>> 823 # to have actual conforming behavior enabled.
>> 824 KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
990 825
991 # Make sure -fstack-check isn't enabled (like 826 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS += -fno-stack-check !! 827 KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
993 828
994 # conserve stack if available 829 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC !! 830 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
996 KBUILD_CFLAGS += -fconserve-stack <<
997 endif <<
998 831
999 # change __FILE__ to the relative path from th !! 832 # disallow errors like 'EXPORT_GPL(foo);' with missing header
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 833 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
1001 834
1002 # include additional Makefiles when needed !! 835 # require functions to have arguments in prototypes, not empty 'int foo()'
1003 include-y := scripts/Ma !! 836 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
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 837
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) !! 838 # Prohibit date/time macros, which would make the build non-deterministic
1035 LDFLAGS_vmlinux += -X !! 839 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
1036 endif <<
1037 840
1038 ifeq ($(CONFIG_RELR),y) !! 841 # enforce correct pointer usage
1039 # ld.lld before 15 did not support -z pack-re !! 842 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1041 endif <<
1042 843
1043 # We never want expected sections to be place !! 844 # Require designated initializers for all marked structures
1044 # linker. All sections should be explicitly n !! 845 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
1045 ifdef CONFIG_LD_ORPHAN_WARN !! 846
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG !! 847 # change __FILE__ to the relative path from the srctree
1047 endif !! 848 KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1048 849
1049 # Align the bit size of userspace programs wi !! 850 # use the deterministic mode of AR if available
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta !! 851 KBUILD_ARFLAGS := $(call ar-option,D)
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta <<
1052 852
1053 # make the checker run with the right archite !! 853 include scripts/Makefile.kasan
1054 CHECKFLAGS += --arch=$(ARCH) !! 854 include scripts/Makefile.extrawarn
>> 855 include scripts/Makefile.ubsan
>> 856
>> 857 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
>> 858 # last assignments
>> 859 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
>> 860 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
>> 861 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
>> 862
>> 863 # Use --build-id when available.
>> 864 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
>> 865 $(call cc-ldoption, -Wl$(comma)--build-id,))
>> 866 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
>> 867 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
1055 868
1056 # insure the checker run with the right endia !! 869 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- !! 870 LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
>> 871 endif
1058 872
1059 # the checker needs the correct machine size !! 873 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) !! 874 LDFLAGS_vmlinux += $(call ld-option, -X,)
>> 875 endif
1061 876
1062 # Default kernel image to build when no speci 877 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman 878 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment 879 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi 880 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value 881 # this default value
1067 export KBUILD_IMAGE ?= vmlinux 882 export KBUILD_IMAGE ?= vmlinux
1068 883
1069 # 884 #
1070 # INSTALL_PATH specifies where to place the u 885 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i 886 # images. Default is /boot, but you can set it to other values
1072 export INSTALL_PATH ?= /boot 887 export INSTALL_PATH ?= /boot
1073 888
1074 # 889 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re 890 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in 891 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default 892 # an argument if needed. Otherwise it defaults to the kernel install path
1078 # 893 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d 894 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080 895
1081 # 896 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 897 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 898 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to 899 # makefile but the argument can be passed to make if needed.
1085 # 900 #
1086 901
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K 902 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 903 export MODLIB
1089 904
1090 PHONY += prepare0 !! 905 #
1091 !! 906 # INSTALL_MOD_STRIP, if defined, will cause modules to be
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 907 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
1093 export MODORDER := $(extmod_prefix)modules.or !! 908 # the default option --strip-debug will be used. Otherwise,
1094 export MODULES_NSDEPS := $(extmod_prefix)modu !! 909 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
1095 !! 910
1096 ifeq ($(KBUILD_EXTMOD),) !! 911 ifdef INSTALL_MOD_STRIP
>> 912 ifeq ($(INSTALL_MOD_STRIP),1)
>> 913 mod_strip_cmd = $(STRIP) --strip-debug
>> 914 else
>> 915 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
>> 916 endif # INSTALL_MOD_STRIP=1
>> 917 else
>> 918 mod_strip_cmd = true
>> 919 endif # INSTALL_MOD_STRIP
>> 920 export mod_strip_cmd
>> 921
>> 922 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
>> 923 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
>> 924 # or CONFIG_MODULE_COMPRESS_XZ.
>> 925
>> 926 mod_compress_cmd = true
>> 927 ifdef CONFIG_MODULE_COMPRESS
>> 928 ifdef CONFIG_MODULE_COMPRESS_GZIP
>> 929 mod_compress_cmd = gzip -n -f
>> 930 endif # CONFIG_MODULE_COMPRESS_GZIP
>> 931 ifdef CONFIG_MODULE_COMPRESS_XZ
>> 932 mod_compress_cmd = xz -f
>> 933 endif # CONFIG_MODULE_COMPRESS_XZ
>> 934 endif # CONFIG_MODULE_COMPRESS
>> 935 export mod_compress_cmd
>> 936
>> 937 # Select initial ramdisk compression format, default is gzip(1).
>> 938 # This shall be used by the dracut(8) tool while creating an initramfs image.
>> 939 #
>> 940 INITRD_COMPRESS-y := gzip
>> 941 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
>> 942 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
>> 943 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
>> 944 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
>> 945 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
>> 946 # do not export INITRD_COMPRESS, since we didn't actually
>> 947 # choose a sane default compression above.
>> 948 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1097 949
1098 build-dir := . !! 950 ifdef CONFIG_MODULE_SIG_ALL
1099 clean-dirs := $(sort . Documentation \ !! 951 $(eval $(call config_filename,MODULE_SIG_KEY))
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 952
1108 KBUILD_VMLINUX_OBJS := ./built-in.a !! 953 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1109 ifdef CONFIG_MODULES <<
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a <<
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib <<
1112 else 954 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 955 mod_sign_cmd = true
1114 endif 956 endif
>> 957 export mod_sign_cmd
1115 958
1116 export KBUILD_VMLINUX_LIBS <<
1117 export KBUILD_LDS := arch/$(SRCARCH) <<
1118 959
>> 960 ifeq ($(KBUILD_EXTMOD),)
>> 961 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
>> 962
>> 963 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
>> 964 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
>> 965 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
>> 966
>> 967 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
>> 968 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
>> 969
>> 970 init-y := $(patsubst %/, %/built-in.o, $(init-y))
>> 971 core-y := $(patsubst %/, %/built-in.o, $(core-y))
>> 972 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
>> 973 net-y := $(patsubst %/, %/built-in.o, $(net-y))
>> 974 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
>> 975 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
>> 976 libs-y := $(libs-y1) $(libs-y2)
>> 977 virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
>> 978
>> 979 # Externally visible symbols (used by link-vmlinux.sh)
>> 980 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
>> 981 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
>> 982 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
>> 983 export LDFLAGS_vmlinux
>> 984 # used by scripts/pacmage/Makefile
>> 985 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
>> 986
>> 987 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
>> 988
>> 989 # Include targets which we want to execute sequentially if the rest of the
>> 990 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
>> 991 # evaluated more than once.
>> 992 PHONY += vmlinux_prereq
>> 993 vmlinux_prereq: $(vmlinux-deps) FORCE
>> 994 ifdef CONFIG_HEADERS_CHECK
>> 995 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
>> 996 endif
>> 997 ifdef CONFIG_GDB_SCRIPTS
>> 998 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
>> 999 endif
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS 1000 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the !! 1001 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1121 # we have to build modules as well to determi !! 1002 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1122 KBUILD_MODULES := 1 <<
1123 endif 1003 endif
1124 1004
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1005 # standalone target for easier testing
1126 quiet_cmd_ar_vmlinux.a = AR $@ !! 1006 include/generated/autoksyms.h: FORCE
1127 cmd_ar_vmlinux.a = \ !! 1007 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
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 1008
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1009 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1141 @: !! 1010
>> 1011 # Final link of vmlinux with optional arch pass after final link
>> 1012 cmd_link-vmlinux = \
>> 1013 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
>> 1014 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1142 1015
1143 PHONY += vmlinux !! 1016 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1017 +$(call if_changed,link-vmlinux)
1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1018
1146 # unrelated; the decompressors just happen to !! 1019 # Build samples along the rest of the kernel
1147 # arch/*/boot/compressed/vmlinux. !! 1020 ifdef CONFIG_SAMPLES
1148 # Export LDFLAGS_vmlinux only to scripts/Make !! 1021 vmlinux-dirs += samples
1149 # !! 1022 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 1023
1159 # The actual objects are generated when desce 1024 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in 1025 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1026 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1162 1027
1163 ifeq ($(origin KERNELRELEASE),file) !! 1028 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1029 # Preset locale variables to speed up the build process. Limit locale
1165 else !! 1030 # tweaks to this spot to avoid wrong language settings when running
1166 filechk_kernel.release = echo $(KERNELRELEASE !! 1031 # make menuconfig etc.
1167 endif !! 1032 # Error messages still appears in the original language
>> 1033
>> 1034 PHONY += $(vmlinux-dirs)
>> 1035 $(vmlinux-dirs): prepare scripts
>> 1036 $(Q)$(MAKE) $(build)=$@
>> 1037
>> 1038 define filechk_kernel.release
>> 1039 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
>> 1040 endef
1168 1041
1169 # Store (new) KERNELRELEASE string in include 1042 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE !! 1043 include/config/kernel.release: include/config/auto.conf FORCE
1171 $(call filechk,kernel.release) 1044 $(call filechk,kernel.release)
1172 1045
1173 # Additional helpers built in scripts/ <<
1174 # Carefully list dependencies so we do not tr <<
1175 # in parallel <<
1176 PHONY += scripts <<
1177 scripts: scripts_basic scripts_dtc <<
1178 $(Q)$(MAKE) $(build)=$(@) <<
1179 1046
1180 # Things we need to do before we recursively 1047 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare". 1048 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is 1049 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w 1050 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed / 1051 # version.h and scripts_basic is processed / created.
1185 1052
1186 PHONY += prepare archprepare !! 1053 # Listed in dependency order
>> 1054 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1187 1055
1188 archprepare: outputmakefile archheaders archs !! 1056 # prepare3 is used to check if we are building in a separate output directory,
1189 asm-generic $(version_h) include/gene !! 1057 # and if so do:
1190 include/generated/compile.h include/g !! 1058 # 1) Check that make has not been executed in the kernel src $(srctree)
1191 !! 1059 prepare3: include/config/kernel.release
1192 prepare0: archprepare !! 1060 ifneq ($(KBUILD_SRC),)
1193 $(Q)$(MAKE) $(build)=scripts/mod !! 1061 @$(kecho) ' Using $(srctree) as source for kernel'
1194 $(Q)$(MAKE) $(build)=. prepare !! 1062 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
>> 1063 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
>> 1064 echo >&2 " in the '$(srctree)' directory.";\
>> 1065 /bin/false; \
>> 1066 fi;
>> 1067 endif
>> 1068
>> 1069 # prepare2 creates a makefile if using a separate output directory.
>> 1070 # From this point forward, .config has been reprocessed, so any rules
>> 1071 # that need to depend on updated CONFIG_* values can be checked here.
>> 1072 prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
>> 1073
>> 1074 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
>> 1075 include/config/auto.conf
>> 1076 $(cmd_crmodverdir)
>> 1077
>> 1078 archprepare: archheaders archscripts prepare1 scripts_basic
>> 1079
>> 1080 prepare0: archprepare gcc-plugins
>> 1081 $(Q)$(MAKE) $(build)=.
1195 1082
1196 # All the preparing.. 1083 # All the preparing..
1197 prepare: prepare0 !! 1084 prepare: prepare0 prepare-objtool
1198 ifdef CONFIG_RUST !! 1085
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip !! 1086 ifdef CONFIG_STACK_VALIDATION
1200 $(Q)$(MAKE) $(build)=rust !! 1087 has_libelf := $(call try-run,\
>> 1088 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
>> 1089 ifeq ($(has_libelf),1)
>> 1090 objtool_target := tools/objtool FORCE
>> 1091 else
>> 1092 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
>> 1093 SKIP_STACK_VALIDATION := 1
>> 1094 export SKIP_STACK_VALIDATION
>> 1095 endif
1201 endif 1096 endif
1202 1097
1203 PHONY += remove-stale-files !! 1098 PHONY += prepare-objtool
1204 remove-stale-files: !! 1099 prepare-objtool: $(objtool_target)
1205 $(Q)$(srctree)/scripts/remove-stale-f <<
1206 1100
1207 # Support for using generic headers in asm-ge !! 1101 # Check for CONFIG flags that require compiler support. Abort the build
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1102 # after .config has been processed, but before the kernel build starts.
1209 !! 1103 #
1210 PHONY += asm-generic uapi-asm-generic !! 1104 # For security-sensitive CONFIG options, we don't want to fallback and/or
1211 asm-generic: uapi-asm-generic !! 1105 # silently change which compiler flags will be used, since that leads to
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1106 # producing kernels with different security feature characteristics
1213 generic=include/asm-generic !! 1107 # depending on the compiler used. (For example, "But I selected
1214 uapi-asm-generic: !! 1108 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1109 PHONY += prepare-compiler-check
1216 generic=include/uapi/asm-generic !! 1110 prepare-compiler-check: FORCE
>> 1111 # Make sure compiler supports requested stack protector flag.
>> 1112 ifdef stackp-name
>> 1113 ifeq ($(call cc-option, $(stackp-flag)),)
>> 1114 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
>> 1115 $(stackp-flag) not supported by compiler >&2 && exit 1
>> 1116 endif
>> 1117 endif
>> 1118 # Make sure compiler does not have buggy stack-protector support.
>> 1119 ifdef stackp-check
>> 1120 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
>> 1121 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
>> 1122 $(stackp-flag) available but compiler is broken >&2 && exit 1
>> 1123 endif
>> 1124 endif
>> 1125 @:
1217 1126
1218 # Generate some files 1127 # Generate some files
1219 # ------------------------------------------- 1128 # ---------------------------------------------------------------------------
1220 1129
1221 # KERNELRELEASE can change from a few differe 1130 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force 1131 # needs to be updated, so this check is forced on all builds
1223 1132
1224 uts_len := 64 1133 uts_len := 64
1225 define filechk_utsrelease.h 1134 define filechk_utsrelease.h
1226 if [ `echo -n "$(KERNELRELEASE)" | wc 1135 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227 echo '"$(KERNELRELEASE)" exceeds $( 1136 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 exit 1; 1137 exit 1; \
1229 fi; 1138 fi; \
1230 echo \#define UTS_RELEASE \"$(KERNELR !! 1139 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1231 endef 1140 endef
1232 1141
1233 define filechk_version.h 1142 define filechk_version.h
1234 if [ $(SUBLEVEL) -gt 255 ]; then !! 1143 (echo \#define LINUX_VERSION_CODE $(shell \
1235 echo \#define LINUX_VERSION_C !! 1144 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 255); \
1236 expr $(VERSION) \* 65536 + $( !! 1145 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 1146 endef
1247 1147
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1148 $(version_h): $(srctree)/Makefile FORCE
1249 $(version_h): private SUBLEVEL := $(or $(SUBL <<
1250 $(version_h): FORCE <<
1251 $(call filechk,version.h) 1149 $(call filechk,version.h)
>> 1150 $(Q)rm -f $(old_version_h)
1252 1151
1253 include/generated/utsrelease.h: include/confi 1152 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254 $(call filechk,utsrelease.h) 1153 $(call filechk,utsrelease.h)
1255 1154
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 1155 PHONY += headerdep
1263 headerdep: 1156 headerdep:
1264 $(Q)find $(srctree)/include/ -name '* 1157 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265 $(srctree)/scripts/headerdep.pl -I$(s 1158 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 1159
1267 # ------------------------------------------- 1160 # ---------------------------------------------------------------------------
>> 1161 # Firmware install
>> 1162 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
>> 1163 export INSTALL_FW_PATH
>> 1164
>> 1165 PHONY += firmware_install
>> 1166 firmware_install:
>> 1167 @mkdir -p $(objtree)/firmware
>> 1168 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
>> 1169
>> 1170 # ---------------------------------------------------------------------------
1268 # Kernel headers 1171 # Kernel headers
1269 1172
1270 #Default location for installed headers 1173 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr 1174 export INSTALL_HDR_PATH = $(objtree)/usr
1272 1175
1273 quiet_cmd_headers_install = INSTALL $(INSTALL !! 1176 # If we do an all arch process set dst to asm-$(hdr-arch)
1274 cmd_headers_install = \ !! 1177 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1275 mkdir -p $(INSTALL_HDR_PATH); \ <<
1276 rsync -mrl --include='*/' --include=' <<
1277 usr/include $(INSTALL_HDR_PATH) <<
1278 1178
1279 PHONY += headers_install !! 1179 PHONY += archheaders
1280 headers_install: headers !! 1180 archheaders:
1281 $(call cmd,headers_install) <<
1282 1181
1283 PHONY += archheaders archscripts !! 1182 PHONY += archscripts
>> 1183 archscripts:
1284 1184
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he !! 1185 PHONY += __headers
>> 1186 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts
>> 1187 $(Q)$(MAKE) $(build)=scripts build_unifdef
>> 1188
>> 1189 PHONY += headers_install_all
>> 1190 headers_install_all:
>> 1191 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1286 1192
1287 PHONY += headers !! 1193 PHONY += headers_install
1288 headers: $(version_h) scripts_unifdef uapi-as !! 1194 headers_install: __headers
1289 $(if $(filter um, $(SRCARCH)), $(erro !! 1195 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
>> 1196 $(error Headers not exportable for the $(SRCARCH) architecture))
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1197 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC !! 1198 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
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 1199
1320 # ------------------------------------------- !! 1200 PHONY += headers_check_all
1321 # Tools !! 1201 headers_check_all: headers_install_all
1322 !! 1202 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1323 ifdef CONFIG_OBJTOOL !! 1203
1324 prepare: tools/objtool !! 1204 PHONY += headers_check
1325 endif !! 1205 headers_check: headers_install
1326 !! 1206 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1327 ifdef CONFIG_BPF !! 1207 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1328 ifdef CONFIG_DEBUG_INFO_BTF <<
1329 prepare: tools/bpf/resolve_btfids <<
1330 endif <<
1331 endif <<
1332 <<
1333 # The tools build system is not a part of Kbu <<
1334 # its own unique issues. If you need to integ <<
1335 # please consider locating that tool outside <<
1336 # standard Kbuild "hostprogs" syntax instead <<
1337 # here. See Documentation/kbuild/makefiles.rs <<
1338 <<
1339 PHONY += resolve_btfids_clean <<
1340 <<
1341 resolve_btfids_O = $(abspath $(objtree))/tool <<
1342 <<
1343 # tools/bpf/resolve_btfids directory might no <<
1344 # in output directory, skip its clean in that <<
1345 resolve_btfids_clean: <<
1346 ifneq ($(wildcard $(resolve_btfids_O)),) <<
1347 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ <<
1348 endif <<
1349 <<
1350 # Clear a bunch of variables before executing <<
1351 ifeq ($(quiet),silent_) <<
1352 tools_silent=s <<
1353 endif <<
1354 <<
1355 tools/: FORCE <<
1356 $(Q)mkdir -p $(objtree)/tools <<
1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1358 <<
1359 tools/%: FORCE <<
1360 $(Q)mkdir -p $(objtree)/tools <<
1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1362 1208
1363 # ------------------------------------------- 1209 # ---------------------------------------------------------------------------
1364 # Kernel selftest 1210 # Kernel selftest
1365 1211
1366 PHONY += kselftest 1212 PHONY += kselftest
1367 kselftest: headers !! 1213 kselftest:
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1214 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1369 1215
1370 kselftest-%: headers FORCE !! 1216 kselftest-clean:
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1217 $(Q)$(MAKE) -C tools/testing/selftests clean
1372 1218
1373 PHONY += kselftest-merge 1219 PHONY += kselftest-merge
1374 kselftest-merge: 1220 kselftest-merge:
1375 $(if $(wildcard $(objtree)/.config),, 1221 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376 $(Q)find $(srctree)/tools/testing/sel !! 1222 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1377 xargs $(srctree)/scripts/kcon !! 1223 -m $(objtree)/.config \
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol !! 1224 $(srctree)/tools/testing/selftests/*/config
1379 !! 1225 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1380 # ------------------------------------------- <<
1381 # Devicetree files <<
1382 <<
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ <<
1384 dtstree := arch/$(SRCARCH)/boot/dts <<
1385 endif <<
1386 <<
1387 ifneq ($(dtstree),) <<
1388 <<
1389 %.dtb: dtbs_prepare <<
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts <<
1391 <<
1392 %.dtbo: dtbs_prepare <<
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts <<
1394 <<
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ <<
1396 dtbs: dtbs_prepare <<
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- <<
1398 <<
1399 # include/config/kernel.release is actually n <<
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) <<
1401 # dtbs_install depend on it as dtbs_install m <<
1402 dtbs_prepare: include/config/kernel.release s <<
1403 <<
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), <<
1405 export CHECK_DTBS=y <<
1406 endif <<
1407 <<
1408 ifneq ($(CHECK_DTBS),) <<
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif <<
1411 <<
1412 dtbs_check: dtbs <<
1413 <<
1414 dtbs_install: <<
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1416 <<
1417 ifdef CONFIG_OF_EARLY_FLATTREE <<
1418 all: dtbs <<
1419 endif <<
1420 <<
1421 endif <<
1422 <<
1423 PHONY += scripts_dtc <<
1424 scripts_dtc: scripts_basic <<
1425 $(Q)$(MAKE) $(build)=scripts/dtc <<
1426 <<
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO <<
1428 export CHECK_DTBS=y <<
1429 endif <<
1430 <<
1431 PHONY += dt_binding_check dt_binding_schemas <<
1432 dt_binding_check: dt_binding_schemas scripts_ <<
1433 $(Q)$(MAKE) $(build)=Documentation/de <<
1434 <<
1435 dt_binding_schemas: <<
1436 $(Q)$(MAKE) $(build)=Documentation/de <<
1437 <<
1438 PHONY += dt_compatible_check <<
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 1226
1442 # ------------------------------------------- 1227 # ---------------------------------------------------------------------------
1443 # Modules 1228 # Modules
1444 1229
1445 ifdef CONFIG_MODULES 1230 ifdef CONFIG_MODULES
1446 1231
1447 # By default, build modules as well 1232 # By default, build modules as well
1448 1233
1449 all: modules 1234 all: modules
1450 1235
1451 # When we're building modules with modversion 1236 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as 1237 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo 1238 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS 1239 ifdef CONFIG_MODVERSIONS
1455 KBUILD_BUILTIN := 1 1240 KBUILD_BUILTIN := 1
1456 endif 1241 endif
1457 1242
1458 # Build modules 1243 # Build modules
1459 # 1244 #
>> 1245 # A module can be listed more than once in obj-m resulting in
>> 1246 # duplicate lines in modules.order files. Those are removed
>> 1247 # using awk while concatenating to the final file.
>> 1248
>> 1249 PHONY += modules
>> 1250 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
>> 1251 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
>> 1252 @$(kecho) ' Building modules, stage 2.';
>> 1253 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
>> 1254 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1460 1255
1461 # *.ko are usually independent of vmlinux, bu !! 1256 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1462 # is an exception. !! 1257 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES !! 1258
1464 KBUILD_BUILTIN := 1 !! 1259 %/modules.builtin: include/config/auto.conf
1465 modules: vmlinux !! 1260 $(Q)$(MAKE) $(modbuiltin)=$*
1466 endif <<
1467 1261
1468 modules: modules_prepare <<
1469 1262
1470 # Target to prepare building external modules 1263 # Target to prepare building external modules
1471 modules_prepare: prepare !! 1264 PHONY += modules_prepare
1472 $(Q)$(MAKE) $(build)=scripts scripts/ !! 1265 modules_prepare: prepare scripts
>> 1266
>> 1267 # Target to install modules
>> 1268 PHONY += modules_install
>> 1269 modules_install: _modinst_ _modinst_post
>> 1270
>> 1271 PHONY += _modinst_
>> 1272 _modinst_:
>> 1273 @rm -rf $(MODLIB)/kernel
>> 1274 @rm -f $(MODLIB)/source
>> 1275 @mkdir -p $(MODLIB)/kernel
>> 1276 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
>> 1277 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
>> 1278 rm -f $(MODLIB)/build ; \
>> 1279 ln -s $(CURDIR) $(MODLIB)/build ; \
>> 1280 fi
>> 1281 @cp -f $(objtree)/modules.order $(MODLIB)/
>> 1282 @cp -f $(objtree)/modules.builtin $(MODLIB)/
>> 1283 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
>> 1284
>> 1285 # This depmod is only for convenience to give the initial
>> 1286 # boot a modules.dep even before / is mounted read-write. However the
>> 1287 # boot script depmod is the master version.
>> 1288 PHONY += _modinst_post
>> 1289 _modinst_post: _modinst_
>> 1290 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
>> 1291 $(call cmd,depmod)
>> 1292
>> 1293 ifeq ($(CONFIG_MODULE_SIG), y)
>> 1294 PHONY += modules_sign
>> 1295 modules_sign:
>> 1296 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
>> 1297 endif
>> 1298
>> 1299 else # CONFIG_MODULES
>> 1300
>> 1301 # Modules not configured
>> 1302 # ---------------------------------------------------------------------------
>> 1303
>> 1304 PHONY += modules modules_install
>> 1305 modules modules_install:
>> 1306 @echo >&2
>> 1307 @echo >&2 "The present kernel configuration has modules disabled."
>> 1308 @echo >&2 "Type 'make config' and enable loadable module support."
>> 1309 @echo >&2 "Then build a kernel with module support enabled."
>> 1310 @echo >&2
>> 1311 @exit 1
1473 1312
1474 endif # CONFIG_MODULES 1313 endif # CONFIG_MODULES
1475 1314
1476 ### 1315 ###
1477 # Cleaning is done on three levels. 1316 # Cleaning is done on three levels.
1478 # make clean Delete most generated files 1317 # make clean Delete most generated files
1479 # Leave enough to build extern 1318 # Leave enough to build external modules
1480 # make mrproper Delete the current configura 1319 # make mrproper Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files, 1320 # make distclean Remove editor backup files, patch leftover files and the like
1482 1321
1483 # Directories & files removed with 'make clea 1322 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1323 CLEAN_DIRS += $(MODVERDIR)
1485 modules.builtin modules.builti <<
1486 compile_commands.json rust/tes <<
1487 rust-project.json .vmlinux.obj <<
1488 1324
1489 # Directories & files removed with 'make mrpr 1325 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene !! 1326 MRPROPER_DIRS += include/config usr/include include/generated \
1491 arch/$(SRCARCH)/include/gen !! 1327 arch/*/include/generated .tmp_objdiff
1492 debian snap tar-install PKG !! 1328 MRPROPER_FILES += .config .config.old .version .old_version \
1493 .config .config.old .versio !! 1329 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1494 Module.symvers \ !! 1330 signing_key.pem signing_key.priv signing_key.x509 \
1495 certs/signing_key.pem \ !! 1331 x509.genkey extra_certificates signing_key.x509.keyid \
1496 certs/x509.genkey \ !! 1332 signing_key.x509.signer vmlinux-gdb.py
1497 vmlinux-gdb.py \ <<
1498 rpmbuild \ <<
1499 rust/libmacros.so <<
1500 1333
1501 # clean - Delete most, but leave enough to bu 1334 # clean - Delete most, but leave enough to build external modules
1502 # 1335 #
1503 clean: private rm-files := $(CLEAN_FILES) !! 1336 clean: rm-dirs := $(CLEAN_DIRS)
>> 1337 clean: rm-files := $(CLEAN_FILES)
>> 1338 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1504 1339
1505 PHONY += archclean vmlinuxclean !! 1340 PHONY += $(clean-dirs) clean archclean vmlinuxclean
>> 1341 $(clean-dirs):
>> 1342 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1506 1343
1507 vmlinuxclean: 1344 vmlinuxclean:
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script 1345 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f 1346 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510 1347
1511 clean: archclean vmlinuxclean resolve_btfids_ !! 1348 clean: archclean vmlinuxclean
1512 1349
1513 # mrproper - Delete all generated files, incl 1350 # mrproper - Delete all generated files, including .config
1514 # 1351 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1352 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1516 mrproper-dirs := $(addprefix _mrproper_, !! 1353 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
>> 1354 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1517 1355
1518 PHONY += $(mrproper-dirs) mrproper !! 1356 PHONY += $(mrproper-dirs) mrproper archmrproper
1519 $(mrproper-dirs): 1357 $(mrproper-dirs):
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr 1358 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521 1359
1522 mrproper: clean $(mrproper-dirs) !! 1360 mrproper: clean archmrproper $(mrproper-dirs)
>> 1361 $(call cmd,rmdirs)
1523 $(call cmd,rmfiles) 1362 $(call cmd,rmfiles)
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 1363
1528 # distclean 1364 # distclean
1529 # 1365 #
1530 PHONY += distclean 1366 PHONY += distclean
1531 1367
1532 distclean: mrproper 1368 distclean: mrproper
1533 @find . $(RCS_FIND_IGNORE) \ !! 1369 @find $(srctree) $(RCS_FIND_IGNORE) \
1534 \( -name '*.orig' -o -name '* 1370 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535 -o -name '*.bak' -o -name '#* !! 1371 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1536 -o -name 'core' -o -name tags !! 1372 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1537 -o -name GPATH -o -name GRTAG <<
1538 -type f -print | xargs rm -f 1373 -type f -print | xargs rm -f
1539 1374
1540 1375
1541 # Packaging of the kernel to various formats 1376 # Packaging of the kernel to various formats
1542 # ------------------------------------------- 1377 # ---------------------------------------------------------------------------
>> 1378 # rpm target kept for backward compatibility
>> 1379 package-dir := scripts/package
1543 1380
1544 %src-pkg: FORCE 1381 %src-pkg: FORCE
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1382 $(Q)$(MAKE) $(build)=$(package-dir) $@
1546 %pkg: include/config/kernel.release FORCE 1383 %pkg: include/config/kernel.release FORCE
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1384 $(Q)$(MAKE) $(build)=$(package-dir) $@
>> 1385 rpm: include/config/kernel.release FORCE
>> 1386 $(Q)$(MAKE) $(build)=$(package-dir) $@
>> 1387
1548 1388
1549 # Brief documentation of the typical targets 1389 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 1390 # ---------------------------------------------------------------------------
1551 1391
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC 1392 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards))) 1393 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc 1394 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/= 1395 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556 1396
1557 PHONY += help 1397 PHONY += help
1558 help: 1398 help:
1559 @echo 'Cleaning targets:' 1399 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo 1400 @echo ' clean - Remove most generated files but keep the config and'
1561 @echo ' enough bu 1401 @echo ' enough build support to build external modules'
1562 @echo ' mrproper - Remove al 1402 @echo ' mrproper - Remove all generated files + config + various backup files'
1563 @echo ' distclean - mrproper 1403 @echo ' distclean - mrproper + remove editor backup and patch files'
1564 @echo '' 1404 @echo ''
>> 1405 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 1406 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 1407 @echo ''
1567 @echo 'Other generic targets:' 1408 @echo 'Other generic targets:'
1568 @echo ' all - Build all 1409 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 1410 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 1411 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a 1412 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572 @echo ' vdso_install - Install u !! 1413 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
>> 1414 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1573 @echo ' dir/ - Build all 1415 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 1416 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the 1417 @echo ' dir/file.ll - Build the LLVM assembly file'
1576 @echo ' (requires 1418 @echo ' (requires compiler support for LLVM assembly generation)'
1577 @echo ' dir/file.lst - Build spe 1419 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1578 @echo ' (requires 1420 @echo ' (requires a recent binutils and recent build (System.map))'
1579 @echo ' dir/file.ko - Build mod 1421 @echo ' dir/file.ko - Build module including final link'
1580 @echo ' modules_prepare - Set up fo 1422 @echo ' modules_prepare - Set up for building external modules'
1581 @echo ' tags/TAGS - Generate 1423 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate 1424 @echo ' cscope - Generate cscope index'
1583 @echo ' gtags - Generate 1425 @echo ' gtags - Generate GNU GLOBAL index'
1584 @echo ' kernelrelease - Output th 1426 @echo ' kernelrelease - Output the release version string (use with make -s)'
1585 @echo ' kernelversion - Output th 1427 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1586 @echo ' image_name - Output th 1428 @echo ' image_name - Output the image name (use with make -s)'
1587 @echo ' headers_install - Install s 1429 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588 echo ' (default: 1430 echo ' (default: $(INSTALL_HDR_PATH))'; \
1589 echo '' 1431 echo ''
1590 @echo 'Static analysers:' !! 1432 @echo 'Static analysers'
1591 @echo ' checkstack - Generate !! 1433 @echo ' checkstack - Generate a list of stack hogs'
1592 @echo ' with a st !! 1434 @echo ' namespacecheck - Name space analysis on compiled kernel'
1593 @echo ' versioncheck - Sanity ch 1435 @echo ' versioncheck - Sanity check on version.h usage'
1594 @echo ' includecheck - Check for 1436 @echo ' includecheck - Check for duplicate included header files'
1595 @echo ' export_report - List the 1437 @echo ' export_report - List the usages of all exported symbols'
>> 1438 @echo ' headers_check - Sanity check on exported headers'
1596 @echo ' headerdep - Detect in 1439 @echo ' headerdep - Detect inclusion cycles in headers'
1597 @echo ' coccicheck - Check wit !! 1440 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1598 @echo ' clang-analyzer - Check wit <<
1599 @echo ' clang-tidy - Check wit <<
1600 @echo '' <<
1601 @echo 'Tools:' <<
1602 @echo ' nsdeps - Generate <<
1603 @echo '' 1441 @echo ''
1604 @echo 'Kernel selftest:' !! 1442 @echo 'Kernel selftest'
1605 @echo ' kselftest - Build a !! 1443 @echo ' kselftest - Build and run kernel selftest (run as root)'
1606 @echo ' Build, !! 1444 @echo ' Build, install, and boot kernel before'
1607 @echo ' running !! 1445 @echo ' running kselftest on it'
1608 @echo ' Run as !! 1446 @echo ' kselftest-clean - Remove all generated kselftest files'
1609 @echo ' kselftest-all - Build k !! 1447 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed'
1610 @echo ' kselftest-install - Build a !! 1448 @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 '' <<
1633 @$(if $(dtstree), \ <<
1634 echo 'Devicetree:'; \ <<
1635 echo '* dtbs - <<
1636 echo ' dtbs_install - <<
1637 echo ' dt_binding_check - <<
1638 echo ' dt_binding_schema - <<
1639 echo ' dtbs_check - <<
1640 echo '') <<
1641 <<
1642 @echo 'Userspace tools targets:' <<
1643 @echo ' use "make tools/help"' <<
1644 @echo ' or "cd tools; make help"' <<
1645 @echo '' 1449 @echo ''
1646 @echo 'Kernel packaging:' 1450 @echo 'Kernel packaging:'
1647 @$(MAKE) -f $(srctree)/scripts/Makefi !! 1451 @$(MAKE) $(build)=$(package-dir) help
1648 @echo '' 1452 @echo ''
1649 @echo 'Documentation targets:' 1453 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ !! 1454 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp
>> 1455 @echo ''
>> 1456 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1651 @echo '' 1457 @echo ''
1652 @echo 'Architecture-specific targets !! 1458 @echo 'Architecture specific targets ($(SRCARCH)):'
1653 @$(or $(archhelp),\ !! 1459 @$(if $(archhelp),$(archhelp),\
1654 echo ' No architecture-speci !! 1460 echo ' No architecture specific help defined for $(SRCARCH)')
1655 @echo '' 1461 @echo ''
1656 @$(if $(boards), \ 1462 @$(if $(boards), \
1657 $(foreach b, $(boards), \ 1463 $(foreach b, $(boards), \
1658 printf " %-27s - Build for % !! 1464 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659 echo '') 1465 echo '')
1660 @$(if $(board-dirs), \ 1466 @$(if $(board-dirs), \
1661 $(foreach b, $(board-dirs), \ 1467 $(foreach b, $(board-dirs), \
1662 printf " %-16s - Show %s-spe 1468 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663 printf " %-16s - Show all of 1469 printf " %-16s - Show all of the above\\n" help-boards; \
1664 echo '') 1470 echo '')
1665 1471
1666 @echo ' make V=n [targets] 1: ver !! 1472 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667 @echo ' 2: giv !! 1473 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 1474 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check !! 1475 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1671 @echo ' (spars <<
1672 @echo ' make C=2 [targets] Force 1476 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1673 @echo ' make RECORDMCOUNT_WARN=1 [t 1477 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674 @echo ' make W=n [targets] Enable !! 1478 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1675 @echo ' 1: warnings w 1479 @echo ' 1: warnings which may be relevant and do not occur too often'
1676 @echo ' 2: warnings w 1480 @echo ' 2: warnings which occur quite often but may still be relevant'
1677 @echo ' 3: more obscu 1481 @echo ' 3: more obscure warnings, can most likely be ignored'
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a <<
1680 @echo ' Multiple leve 1482 @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 '' 1483 @echo ''
1686 @echo 'Execute "make" or "make all" 1484 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 1485 @echo 'For further info see the ./README file'
1688 1486
1689 1487
1690 help-board-dirs := $(addprefix help-,$(board- 1488 help-board-dirs := $(addprefix help-,$(board-dirs))
1691 1489
1692 help-boards: $(help-board-dirs) 1490 help-boards: $(help-board-dirs)
1693 1491
1694 boards-per-dir = $(sort $(notdir $(wildcard $ 1492 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695 1493
1696 $(help-board-dirs): help-%: 1494 $(help-board-dirs): help-%:
1697 @echo 'Architecture-specific targets !! 1495 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1698 @$(if $(boards-per-dir), \ 1496 @$(if $(boards-per-dir), \
1699 $(foreach b, $(boards-per-dir 1497 $(foreach b, $(boards-per-dir), \
1700 printf " %-24s - Build for % 1498 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701 echo '') 1499 echo '')
1702 1500
1703 1501
1704 # Documentation targets 1502 # Documentation targets
1705 # ------------------------------------------- 1503 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html !! 1504 DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs
1707 linkcheckdocs dochelp refcheck <<
1708 PHONY += $(DOC_TARGETS) 1505 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS): !! 1506 $(DOC_TARGETS): scripts_basic FORCE
1710 $(Q)$(MAKE) $(build)=Documentation $@ !! 1507 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1711 !! 1508 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@
1712 !! 1509 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
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 1510
1771 else # KBUILD_EXTMOD 1511 else # KBUILD_EXTMOD
1772 1512
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### 1513 ###
1776 # External module support. 1514 # External module support.
1777 # When building external modules the kernel u 1515 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma 1516 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If 1517 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands !! 1518 # in the basis kernel ordinary make commands (without M=...) must
>> 1519 # be used.
>> 1520 #
>> 1521 # The following are the only valid targets when building external
>> 1522 # modules.
>> 1523 # make M=dir clean Delete all automatically generated files
>> 1524 # make M=dir modules Make all modules in specified dir
>> 1525 # make M=dir Same as 'make M=dir modules'
>> 1526 # make M=dir modules_install
>> 1527 # Install the modules built in the module directory
>> 1528 # Assumes install directory is already created
1781 1529
1782 # We are always building only modules. !! 1530 # We are always building modules
1783 KBUILD_BUILTIN := <<
1784 KBUILD_MODULES := 1 1531 KBUILD_MODULES := 1
1785 1532
1786 build-dir := $(KBUILD_EXTMOD) !! 1533 PHONY += $(objtree)/Module.symvers
>> 1534 $(objtree)/Module.symvers:
>> 1535 @test -e $(objtree)/Module.symvers || ( \
>> 1536 echo; \
>> 1537 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
>> 1538 echo " is missing; modules will have no dependencies and modversions."; \
>> 1539 echo )
>> 1540
>> 1541 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
>> 1542 PHONY += $(module-dirs) modules
>> 1543 $(module-dirs): prepare $(objtree)/Module.symvers
>> 1544 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1787 1545
1788 compile_commands.json: $(extmod_prefix)compil !! 1546 modules: $(module-dirs)
1789 PHONY += compile_commands.json !! 1547 @$(kecho) ' Building modules, stage 2.';
>> 1548 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1790 1549
1791 clean-dirs := $(KBUILD_EXTMOD) !! 1550 PHONY += modules_install
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1551 modules_install: _emodinst_ _emodinst_post
1793 $(KBUILD_EXTMOD)/compile_commands.jso !! 1552
1794 !! 1553 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1795 PHONY += prepare !! 1554 PHONY += _emodinst_
1796 # now expand this into a simple variable to r !! 1555 _emodinst_:
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1556 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1798 prepare: !! 1557 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1558
1800 echo >&2 "warning: the compil !! 1559 PHONY += _emodinst_post
1801 echo >&2 " The kernel was bu !! 1560 _emodinst_post: _emodinst_
1802 echo >&2 " You are using: !! 1561 $(call cmd,depmod)
1803 fi !! 1562
>> 1563 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
>> 1564
>> 1565 PHONY += $(clean-dirs) clean
>> 1566 $(clean-dirs):
>> 1567 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
>> 1568
>> 1569 clean: rm-dirs := $(MODVERDIR)
>> 1570 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1804 1571
1805 PHONY += help 1572 PHONY += help
1806 help: 1573 help:
1807 @echo ' Building external modules.' 1574 @echo ' Building external modules.'
1808 @echo ' Syntax: make -C path/to/ker 1575 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1809 @echo '' 1576 @echo ''
1810 @echo ' modules - default t 1577 @echo ' modules - default target, build the module(s)'
1811 @echo ' modules_install - install t 1578 @echo ' modules_install - install the module'
1812 @echo ' clean - remove ge 1579 @echo ' clean - remove generated files in module directory only'
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' 1580 @echo ''
1815 1581
1816 ifndef CONFIG_MODULES !! 1582 # Dummies...
1817 modules modules_install: __external_modules_e !! 1583 PHONY += prepare scripts
1818 __external_modules_error: !! 1584 prepare:
1819 @echo >&2 '***' !! 1585 $(cmd_crmodverdir)
1820 @echo >&2 '*** The present kernel dis !! 1586 scripts: ;
1821 @echo >&2 '*** You cannot build or in <<
1822 @echo >&2 '***' <<
1823 @false <<
1824 endif <<
1825 <<
1826 endif # KBUILD_EXTMOD 1587 endif # KBUILD_EXTMOD
1827 1588
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) 1589 clean: $(clean-dirs)
>> 1590 $(call cmd,rmdirs)
1934 $(call cmd,rmfiles) 1591 $(call cmd,rmfiles)
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1592 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936 \( -name '*.[aios]' -o -name !! 1593 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1937 -o -name '*.ko.*' \ 1594 -o -name '*.ko.*' \
1938 -o -name '*.dtb' -o -name '*. !! 1595 -o -name '*.dwo' \
1939 -o -name '*.dtb.S' -o -name ' !! 1596 -o -name '*.su' \
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. <<
1942 -o -name '*.su' -o -name '*.m <<
1943 -o -name '.*.d' -o -name '.*. 1597 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944 -o -name '*.lex.c' -o -name ' <<
1945 -o -name '*.asn1.[ch]' \ <<
1946 -o -name '*.symtypes' -o -nam 1598 -o -name '*.symtypes' -o -name 'modules.order' \
>> 1599 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1947 -o -name '*.c.[012]*.*' \ 1600 -o -name '*.c.[012]*.*' \
1948 -o -name '*.ll' \ 1601 -o -name '*.ll' \
1949 -o -name '*.gcno' \ !! 1602 -o -name '*.gcno' \) -type f -print | xargs rm -f
1950 -o -name '*.*.symversions' \) <<
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 1603
1954 # Generate tags for editors 1604 # Generate tags for editors
1955 # ------------------------------------------- 1605 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN $@ 1606 quiet_cmd_tags = GEN $@
1957 cmd_tags = $(BASH) $(srctree)/scripts/t !! 1607 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1958 1608
1959 tags TAGS cscope gtags: FORCE 1609 tags TAGS cscope gtags: FORCE
1960 $(call cmd,tags) 1610 $(call cmd,tags)
1961 1611
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(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 1612 # Scripts to check various things for consistency
2006 # ------------------------------------------- 1613 # ---------------------------------------------------------------------------
2007 1614
2008 PHONY += includecheck versioncheck coccicheck !! 1615 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2009 1616
2010 includecheck: 1617 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) 1618 find $(srctree)/* $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 1619 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) 1620 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014 1621
2015 versioncheck: 1622 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) 1623 find $(srctree)/* $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 1624 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) 1625 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019 1626
2020 coccicheck: 1627 coccicheck:
2021 $(Q)$(BASH) $(srctree)/scripts/$@ !! 1628 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
>> 1629
>> 1630 namespacecheck:
>> 1631 $(PERL) $(srctree)/scripts/namespace.pl
2022 1632
2023 export_report: 1633 export_report:
2024 $(PERL) $(srctree)/scripts/export_rep 1634 $(PERL) $(srctree)/scripts/export_report.pl
2025 1635
>> 1636 endif #ifeq ($(config-targets),1)
>> 1637 endif #ifeq ($(mixed-targets),1)
>> 1638
2026 PHONY += checkstack kernelrelease kernelversi 1639 PHONY += checkstack kernelrelease kernelversion image_name
2027 1640
2028 # UML needs a little special treatment here. 1641 # UML needs a little special treatment here. It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch 1642 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
2030 # else wants $(ARCH), including people doing 1643 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here. 1644 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um) 1645 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH) 1646 CHECKSTACK_ARCH := $(SUBARCH)
2034 else 1647 else
2035 CHECKSTACK_ARCH := $(ARCH) 1648 CHECKSTACK_ARCH := $(ARCH)
2036 endif 1649 endif
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: 1650 checkstack:
2039 $(OBJDUMP) -d vmlinux $$(find . -name 1651 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040 $(PERL) $(srctree)/scripts/checkstack !! 1652 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041 1653
2042 kernelrelease: 1654 kernelrelease:
2043 @$(filechk_kernel.release) !! 1655 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044 1656
2045 kernelversion: 1657 kernelversion:
2046 @echo $(KERNELVERSION) 1658 @echo $(KERNELVERSION)
2047 1659
2048 image_name: 1660 image_name:
2049 @echo $(KBUILD_IMAGE) 1661 @echo $(KBUILD_IMAGE)
2050 1662
2051 PHONY += run-command !! 1663 # Clear a bunch of variables before executing the submake
2052 run-command: !! 1664 tools/: FORCE
2053 $(Q)$(KBUILD_RUN_COMMAND) !! 1665 $(Q)mkdir -p $(objtree)/tools
>> 1666 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
>> 1667
>> 1668 tools/%: FORCE
>> 1669 $(Q)mkdir -p $(objtree)/tools
>> 1670 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
>> 1671
>> 1672 # Single targets
>> 1673 # ---------------------------------------------------------------------------
>> 1674 # Single targets are compatible with:
>> 1675 # - build with mixed source and output
>> 1676 # - build with separate output dir 'make O=...'
>> 1677 # - external modules
>> 1678 #
>> 1679 # target-dir => where to store outputfile
>> 1680 # build-dir => directory in kernel source tree to use
>> 1681
>> 1682 ifeq ($(KBUILD_EXTMOD),)
>> 1683 build-dir = $(patsubst %/,%,$(dir $@))
>> 1684 target-dir = $(dir $@)
>> 1685 else
>> 1686 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
>> 1687 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
>> 1688 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
>> 1689 endif
>> 1690
>> 1691 %.s: %.c prepare scripts FORCE
>> 1692 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1693 %.i: %.c prepare scripts FORCE
>> 1694 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1695 %.o: %.c prepare scripts FORCE
>> 1696 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1697 %.lst: %.c prepare scripts FORCE
>> 1698 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1699 %.s: %.S prepare scripts FORCE
>> 1700 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1701 %.o: %.S prepare scripts FORCE
>> 1702 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1703 %.symtypes: %.c prepare scripts FORCE
>> 1704 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1705 %.ll: %.c prepare scripts FORCE
>> 1706 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>> 1707
>> 1708 # Modules
>> 1709 /: prepare scripts FORCE
>> 1710 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1711 $(build)=$(build-dir)
>> 1712 # Make sure the latest headers are built for Documentation
>> 1713 Documentation/ samples/: headers_install
>> 1714 %/: prepare scripts FORCE
>> 1715 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1716 $(build)=$(build-dir)
>> 1717 %.ko: prepare scripts FORCE
>> 1718 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>> 1719 $(build)=$(build-dir) $(@:.ko=.o)
>> 1720 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
>> 1721
>> 1722 # FIXME Should go into a make.lib or something
>> 1723 # ===========================================================================
>> 1724
>> 1725 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
>> 1726 cmd_rmdirs = rm -rf $(rm-dirs)
2054 1727
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file 1728 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
2056 cmd_rmfiles = rm -rf $(rm-files) !! 1729 cmd_rmfiles = rm -f $(rm-files)
2057 1730
2058 # read saved command lines for existing targe !! 1731 # Run depmod only if we have System.map and depmod is executable
2059 existing-targets := $(wildcard $(sort $(targe !! 1732 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
>> 1733 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
>> 1734 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
2060 1735
2061 -include $(foreach f,$(existing-targets),$(di !! 1736 # Create temporary dir for module support files
>> 1737 # clean it up only when building all modules
>> 1738 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
>> 1739 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
>> 1740
>> 1741 # read all saved command lines
>> 1742
>> 1743 targets := $(wildcard $(sort $(targets)))
>> 1744 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
>> 1745
>> 1746 ifneq ($(cmd_files),)
>> 1747 $(cmd_files): ; # Do not try to update included dependency files
>> 1748 include $(cmd_files)
>> 1749 endif
2062 1750
2063 endif # config-build !! 1751 endif # skip-makefile
2064 endif # mixed-build <<
2065 endif # need-sub-make <<
2066 1752
2067 PHONY += FORCE 1753 PHONY += FORCE
2068 FORCE: 1754 FORCE:
2069 1755
2070 # Declare the contents of the PHONY variable !! 1756 # Declare the contents of the .PHONY variable as phony. We keep that
2071 # information in a variable so we can use it 1757 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY) 1758 .PHONY: $(PHONY)
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