1 # SPDX-License-Identifier: GPL-2.0 !! 1 VERSION = 2
2 VERSION = 6 !! 2 PATCHLEVEL = 6
3 PATCHLEVEL = 11 !! 3 SUBLEVEL = 0
4 SUBLEVEL = 5 <<
5 EXTRAVERSION = 4 EXTRAVERSION =
6 NAME = Baby Opossum Posse <<
7 5
8 # *DOCUMENTATION* 6 # *DOCUMENTATION*
9 # To see a list of typical targets execute "ma 7 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README 8 # More info can be located in ./README
11 # Comments in this file are targeted only to t 9 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel read 10 # expect to learn how to build the kernel reading this file.
13 11
14 ifeq ($(filter output-sync,$(.FEATURES)),) !! 12 # Do not print "Entering directory ..."
15 $(error GNU Make >= 4.0 is required. Your Make !! 13 MAKEFLAGS += --no-print-directory
16 endif <<
17 <<
18 $(if $(filter __%, $(MAKECMDGOALS)), \ <<
19 $(error targets prefixed with '__' are <<
20 <<
21 # That's our default target when none is given <<
22 PHONY := __all <<
23 __all: <<
24 14
25 # We are using a recursive build, so we need t 15 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right. 16 # to get the ordering right.
27 # 17 #
28 # Most importantly: sub-Makefiles should only 18 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we 19 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen !! 20 # a file in another dir (which doesn't happen often, but it's of
31 # unavoidable when linking the built-in.a targ !! 21 # unavoidable when linking the built-in.o targets which finally
32 # turn into vmlinux), we will call a sub make 22 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which 23 # after that we are sure that everything which is in that other dir
34 # is now up to date. 24 # is now up to date.
35 # 25 #
36 # The only cases where we need to modify files 26 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done befo 27 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicit 28 # descending is started. They are now explicitly listed as the
39 # prepare rule. 29 # prepare rule.
40 30
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 <<
61 # -------------------------------------------- <<
62 # <<
63 # Most of build commands in Kbuild start with <<
64 # "quiet_cmd_*". If defined, the short log is <<
65 # that command is printed by default. <<
66 # <<
67 # e.g.) <<
68 # quiet_cmd_depmod = DEPMOD $(MODLIB) <<
69 # cmd_depmod = $(srctree)/scripts/dep <<
70 # <<
71 # A simple variant is to prefix commands with <<
72 # for commands that shall be hidden in non-ver <<
73 # <<
74 # $(Q)$(MAKE) $(build)=scripts/basic <<
75 # <<
76 # If KBUILD_VERBOSE contains 1, the whole comm <<
77 # If KBUILD_VERBOSE contains 2, the reason for <<
78 # <<
79 # To put more focus on warnings, be less verbo 31 # To put more focus on warnings, be less verbose as default
80 # Use 'make V=1' to see the full commands 32 # Use 'make V=1' to see the full commands
81 33
82 ifeq ("$(origin V)", "command line") !! 34 ifdef V
83 KBUILD_VERBOSE = $(V) !! 35 ifeq ("$(origin V)", "command line")
>> 36 KBUILD_VERBOSE = $(V)
>> 37 endif
84 endif 38 endif
85 !! 39 ifndef KBUILD_VERBOSE
86 quiet = quiet_ !! 40 KBUILD_VERBOSE = 0
87 Q = @ <<
88 <<
89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),) <<
90 quiet = <<
91 Q = <<
92 endif 41 endif
93 42
94 # If the user is running make -s (silent mode) !! 43 # Call sparse as part of compilation of C files
95 # commands !! 44 # Use 'make C=1' to enable sparse checking
96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS <<
97 quiet=silent_ <<
98 override KBUILD_VERBOSE := <<
99 endif <<
100 45
101 export quiet Q KBUILD_VERBOSE !! 46 ifdef C
102 !! 47 ifeq ("$(origin C)", "command line")
103 # Call a source code checker (by default, "spa !! 48 KBUILD_CHECKSRC = $(C)
104 # C compilation. !! 49 endif
105 # <<
106 # Use 'make C=1' to enable checking of only re <<
107 # Use 'make C=2' to enable checking of *all* s <<
108 # of whether they are re-compiled or not. <<
109 # <<
110 # See the file "Documentation/dev-tools/sparse <<
111 # including where to get the "sparse" utility. <<
112 <<
113 ifeq ("$(origin C)", "command line") <<
114 KBUILD_CHECKSRC = $(C) <<
115 endif 50 endif
116 ifndef KBUILD_CHECKSRC 51 ifndef KBUILD_CHECKSRC
117 KBUILD_CHECKSRC = 0 52 KBUILD_CHECKSRC = 0
118 endif 53 endif
119 54
120 export KBUILD_CHECKSRC !! 55 # kbuild supports saving output files in a separate directory.
121 !! 56 # To locate output files in a separate directory two syntax'es are supported.
122 # Enable "clippy" (a linter) as part of the Ru !! 57 # In both cases the working directory must be the root of the kernel src.
123 # <<
124 # Use 'make CLIPPY=1' to enable it. <<
125 ifeq ("$(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 := $(W) <<
155 endif <<
156 <<
157 export KBUILD_EXTRA_WARN <<
158 <<
159 # Kbuild will save output files in the current <<
160 # This does not need to match to the root of t <<
161 # <<
162 # For example, you can do this: <<
163 # <<
164 # cd /dir/to/store/output/files; make -f /dir <<
165 # <<
166 # If you want to save output files in a differ <<
167 # two syntaxes to specify it. <<
168 # <<
169 # 1) O= 58 # 1) O=
170 # Use "make O=dir/to/store/output/files/" 59 # Use "make O=dir/to/store/output/files/"
171 # !! 60 #
172 # 2) Set KBUILD_OUTPUT 61 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t !! 62 # Set the environment variable KBUILD_OUTPUT to point to the directory
174 # export KBUILD_OUTPUT=dir/to/store/output/fil !! 63 # where the output files shall be placed.
175 # !! 64 # export KBUILD_OUTPUT=dir/to/store/output/files/
176 # The O= assignment takes precedence over the !! 65 # make
177 # variable. !! 66 #
178 !! 67 # The O= assigment takes precedence over the KBUILD_OUTPUT environment variable.
179 # Do we want to change the working directory? !! 68
180 ifeq ("$(origin O)", "command line") !! 69
181 KBUILD_OUTPUT := $(O) !! 70 # KBUILD_SRC is set on invocation of make in OBJ directory
>> 71 # KBUILD_SRC is not intended to be used by the regular user (for now)
>> 72 ifeq ($(KBUILD_SRC),)
>> 73
>> 74 # OK, Make called in directory where kernel src resides
>> 75 # Do we want to locate output files in a separate directory?
>> 76 ifdef O
>> 77 ifeq ("$(origin O)", "command line")
>> 78 KBUILD_OUTPUT := $(O)
>> 79 endif
182 endif 80 endif
183 81
>> 82 # That's our default target when none is given on the command line
>> 83 .PHONY: all
>> 84 all:
>> 85
184 ifneq ($(KBUILD_OUTPUT),) 86 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does <<
186 $(shell mkdir -p "$(KBUILD_OUTPUT)") <<
187 # $(realpath ...) resolves symlinks <<
188 abs_objtree := $(realpath $(KBUILD_OUTPUT)) <<
189 $(if $(abs_objtree),,$(error failed to create <<
190 endif # ifneq ($(KBUILD_OUTPUT),) <<
191 <<
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 <<
193 $(error source directory cannot contain spaces <<
194 endif <<
195 <<
196 export sub_make_done := 1 <<
197 <<
198 endif # sub_make_done <<
199 <<
200 ifeq ($(abs_objtree),$(CURDIR)) <<
201 # Suppress "Entering directory ..." if we are <<
202 no-print-directory := --no-print-directory <<
203 else <<
204 # Recursion to show "Entering directory ..." <<
205 need-sub-make := 1 <<
206 endif <<
207 <<
208 ifeq ($(filter --no-print-directory, $(MAKEFLA <<
209 # If --no-print-directory is unset, recurse on <<
210 # You may end up recursing into __sub-make twi <<
211 # behavior change in GNU Make 4.4.1. <<
212 need-sub-make := 1 <<
213 endif <<
214 <<
215 ifeq ($(need-sub-make),1) <<
216 <<
217 PHONY += $(MAKECMDGOALS) __sub-make <<
218 <<
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) <<
220 @: <<
221 <<
222 # Invoke a second make in the output directory 87 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make: !! 88 # check that the output directory actually exists
224 $(Q)$(MAKE) $(no-print-directory) -C $ !! 89 saved-output := $(KBUILD_OUTPUT)
225 -f $(abs_srctree)/Makefile $(MAKECMDGO !! 90 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
>> 91 $(if $(wildcard $(KBUILD_OUTPUT)),, \
>> 92 $(error output directory "$(saved-output)" does not exist))
>> 93
>> 94 .PHONY: $(MAKECMDGOALS)
>> 95
>> 96 $(filter-out all,$(MAKECMDGOALS)) all:
>> 97 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
>> 98 KBUILD_SRC=$(CURDIR) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \
>> 99 KBUILD_CHECK=$(KBUILD_CHECK) -f $(CURDIR)/Makefile $@
226 100
227 else # need-sub-make !! 101 # Leave processing to above invocation of make
>> 102 skip-makefile := 1
>> 103 endif # ifneq ($(KBUILD_OUTPUT),)
>> 104 endif # ifeq ($(KBUILD_SRC),)
228 105
229 # We process the rest of the Makefile if this 106 # We process the rest of the Makefile if this is the final invocation of make
>> 107 ifeq ($(skip-makefile),)
230 108
231 ifeq ($(abs_srctree),$(abs_objtree)) !! 109 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
232 # building in the source tree !! 110 TOPDIR := $(srctree)
233 srctree := . !! 111 # FIXME - TOPDIR is obsolete, use srctree/objtree
234 building_out_of_srctree := !! 112 objtree := $(CURDIR)
235 else !! 113 src := $(srctree)
236 ifeq ($(abs_srctree)/,$(dir $(abs_objt !! 114 obj := $(objtree)
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 := $(abs_srctree) <<
247 endif <<
248 115
249 objtree := . <<
250 <<
251 VPATH := <<
252 <<
253 ifeq ($(KBUILD_EXTMOD),) <<
254 ifdef building_out_of_srctree <<
255 VPATH := $(srctree) 116 VPATH := $(srctree)
256 endif <<
257 endif <<
258 <<
259 export building_out_of_srctree srctree objtree <<
260 117
261 # To make sure we do not include .config for a !! 118 export srctree objtree VPATH TOPDIR
262 # catch them early, and hand them over to scri <<
263 # It is allowed to specify more targets when c <<
264 # mixing *config targets and build targets. <<
265 # For example 'make oldconfig all'. <<
266 # Detect when mixed targets is specified, and <<
267 # of make so .config is not included in this c <<
268 119
269 version_h := include/generated/uapi/linux/vers !! 120 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
270 121
271 clean-targets := %clean mrproper cleandocs !! 122 # SUBARCH tells the usermode build what the underlying arch is. That is set
272 no-dot-config-targets := $(clean-targets) \ !! 123 # first, and if a usermode build is happening, the "ARCH=um" on the command
273 cscope gtags TAGS tag !! 124 # line overrides the setting of ARCH below. If a native build is happening,
274 $(version_h) headers !! 125 # then ARCH is assigned, getting whatever value it gets normally, and
275 %asm-generic kernelve !! 126 # SUBARCH is subsequently ignored.
276 outputmakefile rustav !! 127
277 no-sync-config-targets := $(no-dot-config-targ !! 128 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
278 image_name !! 129 -e s/arm.*/arm/ -e s/sa110/arm/ \
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 130 -e s/s390x/s390/ -e s/parisc64/parisc/ )
280 <<
281 config-build := <<
282 mixed-build := <<
283 need-config := 1 <<
284 may-sync-config := 1 <<
285 single-build := <<
286 <<
287 ifneq ($(filter $(no-dot-config-targets), $(MA <<
288 ifeq ($(filter-out $(no-dot-config-targets <<
289 need-config := <<
290 endif <<
291 endif <<
292 <<
293 ifneq ($(filter $(no-sync-config-targets), $(M <<
294 ifeq ($(filter-out $(no-sync-config-target <<
295 may-sync-config := <<
296 endif <<
297 endif <<
298 <<
299 need-compiler := $(may-sync-config) <<
300 <<
301 ifneq ($(KBUILD_EXTMOD),) <<
302 may-sync-config := <<
303 endif <<
304 <<
305 ifeq ($(KBUILD_EXTMOD),) <<
306 ifneq ($(filter %config,$(MAKECMDGOALS)),) <<
307 config-build := 1 <<
308 ifneq ($(words $(MAKECMDGOALS)),1) <<
309 mixed-build := 1 <<
310 endif <<
311 endif <<
312 endif <<
313 <<
314 # We cannot build single targets and the other <<
315 ifneq ($(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 <<
328 <<
329 # install and modules_install need also be pro <<
330 ifneq ($(filter install,$(MAKECMDGOALS)),) <<
331 ifneq ($(filter modules_install,$(MAKECMDG <<
332 mixed-build := 1 <<
333 endif <<
334 endif <<
335 <<
336 ifdef mixed-build <<
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 <<
354 include $(srctree)/scripts/Kbuild.include <<
355 <<
356 # Read KERNELRELEASE from include/config/kerne <<
357 KERNELRELEASE = $(call read-file, include/conf <<
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. <<
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA <<
360 <<
361 include $(srctree)/scripts/subarch.include <<
362 131
363 # Cross compiling and selecting different set 132 # Cross compiling and selecting different set of gcc/bin-utils
364 # -------------------------------------------- 133 # ---------------------------------------------------------------------------
365 # 134 #
366 # When performing cross compilation for other 135 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for 136 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make: 137 # ARCH can be set during invocation of make:
369 # make ARCH=arm64 !! 138 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir 139 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e 140 # The default ARCH is the host where make is executed.
372 141
373 # CROSS_COMPILE specify the prefix used for al 142 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin 143 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE). 144 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line 145 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu- !! 146 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th 147 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr 148 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL 149 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
>> 150
381 ARCH ?= $(SUBARCH) 151 ARCH ?= $(SUBARCH)
>> 152 CROSS_COMPILE ?=
382 153
383 # Architecture as present in compile.h 154 # Architecture as present in compile.h
384 UTS_MACHINE := $(ARCH) !! 155 UTS_MACHINE := $(ARCH)
385 SRCARCH := $(ARCH) <<
386 156
387 # Additional ARCH settings for x86 !! 157 # SHELL used by kbuild
388 ifeq ($(ARCH),i386) !! 158 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
389 SRCARCH := x86 !! 159 else if [ -x /bin/bash ]; then echo /bin/bash; \
390 endif !! 160 else echo sh; fi ; fi)
391 ifeq ($(ARCH),x86_64) !! 161
392 SRCARCH := x86 !! 162 HOSTCC = gcc
393 endif !! 163 HOSTCXX = g++
>> 164 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
>> 165 HOSTCXXFLAGS = -O2
394 166
395 # Additional ARCH settings for sparc !! 167 # Decide whether to build built-in, modular, or both.
396 ifeq ($(ARCH),sparc32) !! 168 # Normally, just do built-in.
397 SRCARCH := sparc !! 169
398 endif !! 170 KBUILD_MODULES :=
399 ifeq ($(ARCH),sparc64) !! 171 KBUILD_BUILTIN := 1
400 SRCARCH := sparc <<
401 endif <<
402 172
403 # Additional ARCH settings for parisc !! 173 # If we have only "make modules", don't compile built-in objects.
404 ifeq ($(ARCH),parisc64) !! 174 # When we're building modules with modversions, we need to consider
405 SRCARCH := parisc !! 175 # the built-in objects during the descend as well, in order to
>> 176 # make sure the checksums are uptodate before we record them.
>> 177
>> 178 ifeq ($(MAKECMDGOALS),modules)
>> 179 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
406 endif 180 endif
407 181
408 export cross_compiling := !! 182 # If we have "make <whatever> modules", compile modules
409 ifneq ($(SRCARCH),$(SUBARCH)) !! 183 # in addition to whatever we do anyway.
410 cross_compiling := 1 !! 184 # Just "make" or "make all" shall build modules as well
>> 185
>> 186 ifneq ($(filter all modules,$(MAKECMDGOALS)),)
>> 187 KBUILD_MODULES := 1
411 endif 188 endif
412 189
413 KCONFIG_CONFIG ?= .config !! 190 ifeq ($(MAKECMDGOALS),)
414 export KCONFIG_CONFIG !! 191 KBUILD_MODULES := 1
>> 192 endif
415 193
416 # SHELL used by kbuild !! 194 export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE
417 CONFIG_SHELL := sh !! 195 export KBUILD_CHECKSRC KBUILD_SRC
418 196
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS !! 197 # Beautify output
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG !! 198 # ---------------------------------------------------------------------------
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d !! 199 #
>> 200 # Normally, we echo the whole command before executing it. By making
>> 201 # that echo $($(quiet)$(cmd)), we now have the possibility to set
>> 202 # $(quiet) to choose other forms of output instead, e.g.
>> 203 #
>> 204 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
>> 205 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
>> 206 #
>> 207 # If $(quiet) is empty, the whole command will be printed.
>> 208 # If it is set to "quiet_", only the short version will be printed.
>> 209 # If it is set to "silent_", nothing wil be printed at all, since
>> 210 # the variable $(silent_cmd_cc_o_c) doesn't exist.
>> 211 #
>> 212 # A simple variant is to prefix commands with $(Q) - that's usefull
>> 213 # for commands that shall be hidden in non-verbose mode.
>> 214 #
>> 215 # $(Q)ln $@ :<
>> 216 #
>> 217 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
>> 218 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
422 219
423 ifneq ($(LLVM),) !! 220 ifeq ($(KBUILD_VERBOSE),1)
424 ifneq ($(filter %/,$(LLVM)),) !! 221 quiet =
425 LLVM_PREFIX := $(LLVM) !! 222 Q =
426 else ifneq ($(filter -%,$(LLVM)),) !! 223 else
427 LLVM_SUFFIX := $(LLVM) !! 224 quiet=quiet_
>> 225 Q = @
428 endif 226 endif
429 227
430 HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) !! 228 # If the user is running make -s (silent mode), suppress echoing of
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) !! 229 # commands
432 else !! 230
433 HOSTCC = gcc !! 231 ifneq ($(findstring s,$(MAKEFLAGS)),)
434 HOSTCXX = g++ !! 232 quiet=silent_
435 endif 233 endif
436 HOSTRUSTC = rustc <<
437 HOSTPKG_CONFIG = pkg-config <<
438 234
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 235 check_gcc = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
440 -O2 -fomit-frame-poin !! 236
441 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) !! 237 export quiet Q KBUILD_VERBOSE check_gcc
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS) !! 238
443 !! 239 # Look for make include files relative to root of kernel src
444 # These flags apply to all Rust code in the tr !! 240 MAKEFLAGS += --include-dir=$(srctree)
445 # host programs. !! 241
446 export rust_common_flags := --edition=2021 \ !! 242 # For maximum performance (+ possibly random breakage, uncomment
447 -Zbinary_dep_depin !! 243 # the following)
448 -Astable_features !! 244
449 -Dunsafe_op_in_uns !! 245 #MAKEFLAGS += -rR
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 <<
470 246
471 # Make variables (CC, etc...) 247 # Make variables (CC, etc...)
472 CPP = $(CC) -E !! 248
473 ifneq ($(LLVM),) !! 249 AS = $(CROSS_COMPILE)as
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 250 LD = $(CROSS_COMPILE)ld
>> 251 CC = $(CROSS_COMPILE)gcc
>> 252 CPP = $(CC) -E
485 AR = $(CROSS_COMPILE)ar 253 AR = $(CROSS_COMPILE)ar
486 NM = $(CROSS_COMPILE)nm 254 NM = $(CROSS_COMPILE)nm
>> 255 STRIP = $(CROSS_COMPILE)strip
487 OBJCOPY = $(CROSS_COMPILE)objcopy 256 OBJCOPY = $(CROSS_COMPILE)objcopy
488 OBJDUMP = $(CROSS_COMPILE)objdump 257 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 258 AWK = awk
502 INSTALLKERNEL := installkernel !! 259 RPM := $(shell if [ -x "/usr/bin/rpmbuild" ]; then echo rpmbuild; \
>> 260 else echo rpm; fi)
>> 261 GENKSYMS = scripts/genksyms/genksyms
>> 262 DEPMOD = /sbin/depmod
>> 263 KALLSYMS = scripts/kallsyms
503 PERL = perl 264 PERL = perl
504 PYTHON3 = python3 <<
505 CHECK = sparse 265 CHECK = sparse
506 BASH = bash !! 266 MODFLAGS = -DMODULE
507 KGZIP = gzip !! 267 CFLAGS_MODULE = $(MODFLAGS)
508 KBZIP2 = bzip2 !! 268 AFLAGS_MODULE = $(MODFLAGS)
509 KLZOP = lzop !! 269 LDFLAGS_MODULE = -r
510 LZMA = lzma <<
511 LZ4 = lz4c <<
512 XZ = xz <<
513 ZSTD = zstd <<
514 <<
515 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC <<
516 -Wbitwise -Wno-return-void - <<
517 NOSTDINC_FLAGS := <<
518 CFLAGS_MODULE = <<
519 RUSTFLAGS_MODULE = <<
520 AFLAGS_MODULE = <<
521 LDFLAGS_MODULE = <<
522 CFLAGS_KERNEL = 270 CFLAGS_KERNEL =
523 RUSTFLAGS_KERNEL = <<
524 AFLAGS_KERNEL = 271 AFLAGS_KERNEL =
525 LDFLAGS_vmlinux = <<
526 272
527 # Use USERINCLUDE when you must reference the !! 273 NOSTDINC_FLAGS = -nostdinc -iwithprefix include
528 USERINCLUDE := \ <<
529 -I$(srctree)/arch/$(SRCARCH)/i <<
530 -I$(objtree)/arch/$(SRCARCH)/i <<
531 -I$(srctree)/include/uapi \ <<
532 -I$(objtree)/include/generated <<
533 -include $(srctree)/include/li <<
534 -include $(srctree)/include/li <<
535 <<
536 # Use LINUXINCLUDE when you must reference the <<
537 # Needed to be compatible with the O= option <<
538 LINUXINCLUDE := \ <<
539 -I$(srctree)/arch/$(SRCARCH)/i <<
540 -I$(objtree)/arch/$(SRCARCH)/i <<
541 $(if $(building_out_of_srctree <<
542 -I$(objtree)/include \ <<
543 $(USERINCLUDE) <<
544 <<
545 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE <<
546 <<
547 KBUILD_CFLAGS := <<
548 KBUILD_CFLAGS += -std=gnu11 <<
549 KBUILD_CFLAGS += -fshort-wchar <<
550 KBUILD_CFLAGS += -funsigned-char <<
551 KBUILD_CFLAGS += -fno-common <<
552 KBUILD_CFLAGS += -fno-PIE <<
553 KBUILD_CFLAGS += -fno-strict-aliasing <<
554 <<
555 KBUILD_CPPFLAGS := -D__KERNEL__ <<
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \ <<
557 -Cpanic=abort -Cembed-bitc <<
558 -Cforce-unwind-tables=n -C <<
559 -Csymbol-mangling-version= <<
560 -Crelocation-model=static <<
561 -Zfunction-sections=n \ <<
562 -Wclippy::float_arithmetic <<
563 <<
564 KBUILD_AFLAGS_KERNEL := <<
565 KBUILD_CFLAGS_KERNEL := <<
566 KBUILD_RUSTFLAGS_KERNEL := <<
567 KBUILD_AFLAGS_MODULE := -DMODULE <<
568 KBUILD_CFLAGS_MODULE := -DMODULE <<
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE <<
570 KBUILD_LDFLAGS_MODULE := <<
571 KBUILD_LDFLAGS := <<
572 CLANG_FLAGS := <<
573 <<
574 ifeq ($(KBUILD_CLIPPY),1) <<
575 RUSTC_OR_CLIPPY_QUIET := CLIPPY <<
576 RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER) <<
577 else <<
578 RUSTC_OR_CLIPPY_QUIET := RUSTC <<
579 RUSTC_OR_CLIPPY = $(RUSTC) <<
580 endif <<
581 274
582 ifdef RUST_LIB_SRC !! 275 CPPFLAGS := -D__KERNEL__ -Iinclude \
583 export RUST_LIB_SRC !! 276 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
584 endif <<
585 277
586 # Allows the usage of unstable features in sta !! 278 CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
587 export RUSTC_BOOTSTRAP := 1 !! 279 -fno-strict-aliasing -fno-common
588 !! 280 AFLAGS := -D__ASSEMBLY__
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K !! 281
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q !! 282 export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS !! 283 CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF !! 284 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ !! 285 HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE CHECK
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD !! 286
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS !! 287 export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS !! 288 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
597 !! 289 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC !! 290
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU !! 291 export MODVERDIR := .tmp_versions
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 292
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU !! 293 # The temporary file to save gcc -MD generated dependencies must not
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 294 # contain a comma
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 295 comma := ,
>> 296 depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
604 297
605 # Files to ignore in find ... statements 298 # Files to ignore in find ... statements
606 299
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na !! 300 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \) -prune -o
608 -name CVS -o -name . !! 301 RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS
609 -prune -o <<
610 302
611 # ============================================ 303 # ===========================================================================
612 # Rules shared between *config targets and bui 304 # Rules shared between *config targets and build targets
613 305
614 # Basic helpers built in scripts/basic/ !! 306 # Helpers built in scripts/
615 PHONY += scripts_basic <<
616 scripts_basic: <<
617 $(Q)$(MAKE) $(build)=scripts/basic <<
618 <<
619 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 <<
623 # separate output directory. This allows conve <<
624 # 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: <<
635 @if [ -f $(srctree)/.config -o \ <<
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 <<
645 $(call cmd,makefile) <<
646 $(Q)test -e .gitignore || \ <<
647 { echo "# this is build directory, ign <<
648 endif <<
649 307
650 # The expansion should be delayed until arch/$ !! 308 scripts/docproc scripts/split-include : scripts ;
651 # Some architectures define CROSS_COMPILE in a <<
652 # CC_VERSION_TEXT is referenced from Kconfig ( <<
653 # and from include/config/auto.conf.cmd to det <<
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC <<
655 309
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), !! 310 .PHONY: scripts scripts/fixdep
657 include $(srctree)/scripts/Makefile.clang !! 311 scripts:
658 endif !! 312 $(Q)$(MAKE) $(build)=scripts
659 313
660 # Include this also for config targets because !! 314 scripts/fixdep:
661 # cc-cross-prefix to determine CROSS_COMPILE. !! 315 $(Q)$(MAKE) $(build)=scripts $@
662 ifdef need-compiler <<
663 include $(srctree)/scripts/Makefile.compiler <<
664 endif <<
665 316
666 ifdef config-build <<
667 # ============================================ <<
668 # *config targets only - make sure prerequisit <<
669 # in scripts/kconfig to make the *config targe <<
670 317
671 # Read arch-specific Makefile to set KBUILD_DE !! 318 # To make sure we do not include .config for any of the *config targets
672 # KBUILD_DEFCONFIG may point out an alternativ !! 319 # catch them early, and hand them over to scripts/kconfig/Makefile
673 # used for 'make defconfig' !! 320 # It is allowed to specify more targets when calling make, including
674 include $(srctree)/arch/$(SRCARCH)/Makefile !! 321 # mixing *config targets and build targets.
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 322 # For example 'make oldconfig all'.
676 !! 323 # Detect when mixed targets is specified, and make a second invocation
677 config: outputmakefile scripts_basic FORCE !! 324 # of make so .config is not included in this case either (for *config).
678 $(Q)$(MAKE) $(build)=scripts/kconfig $ <<
679 <<
680 %config: outputmakefile scripts_basic FORCE <<
681 $(Q)$(MAKE) $(build)=scripts/kconfig $ <<
682 <<
683 else #!config-build <<
684 # ============================================ <<
685 # Build targets only - this includes vmlinux, <<
686 # targets and others. In general all targets e <<
687 <<
688 # If building an external module we do not car <<
689 # but instead __all depend on modules <<
690 PHONY += all <<
691 ifeq ($(KBUILD_EXTMOD),) <<
692 __all: all <<
693 else <<
694 __all: modules <<
695 endif <<
696 <<
697 targets := <<
698 <<
699 # Decide whether to build built-in, modular, o <<
700 # Normally, just do built-in. <<
701 <<
702 KBUILD_MODULES := <<
703 KBUILD_BUILTIN := 1 <<
704 325
705 # If we have only "make modules", don't compil !! 326 no-dot-config-targets := clean mrproper distclean \
706 ifeq ($(MAKECMDGOALS),modules) !! 327 cscope TAGS tags help %docs check%
707 KBUILD_BUILTIN := <<
708 endif <<
709 328
710 # If we have "make <whatever> modules", compil !! 329 config-targets := 0
711 # in addition to whatever we do anyway. !! 330 mixed-targets := 0
712 # Just "make" or "make all" shall build module !! 331 dot-config := 1
713 332
714 ifneq ($(filter all modules nsdeps %compile_co !! 333 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
715 KBUILD_MODULES := 1 !! 334 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
>> 335 dot-config := 0
>> 336 endif
716 endif 337 endif
717 338
718 ifeq ($(MAKECMDGOALS),) !! 339 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
719 KBUILD_MODULES := 1 !! 340 config-targets := 1
>> 341 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
>> 342 mixed-targets := 1
>> 343 endif
720 endif 344 endif
721 345
722 export KBUILD_MODULES KBUILD_BUILTIN !! 346 ifeq ($(mixed-targets),1)
723 !! 347 # ===========================================================================
724 ifdef need-config !! 348 # We're called with mixed targets (*config and build targets).
725 include include/config/auto.conf !! 349 # Handle them one by one.
726 endif <<
727 350
728 ifeq ($(KBUILD_EXTMOD),) !! 351 %:: FORCE
729 # Objects we will link into vmlinux / subdirs !! 352 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
730 core-y := <<
731 drivers-y := <<
732 libs-y := lib/ <<
733 endif # KBUILD_EXTMOD <<
734 353
735 # The all: target is the default when no targe <<
736 # command line. <<
737 # This allow a user to issue only 'make' to bu <<
738 # Defaults to vmlinux, but the arch makefile u <<
739 all: vmlinux <<
740 <<
741 CFLAGS_GCOV := -fprofile-arcs -ftest-cover <<
742 ifdef CONFIG_CC_IS_GCC <<
743 CFLAGS_GCOV += -fno-tree-loop-im <<
744 endif <<
745 export CFLAGS_GCOV <<
746 <<
747 # The arch Makefiles can override CC_FLAGS_FTR <<
748 ifdef CONFIG_FUNCTION_TRACER <<
749 CC_FLAGS_FTRACE := -pg <<
750 endif <<
751 <<
752 include $(srctree)/arch/$(SRCARCH)/Makefile <<
753 <<
754 ifdef need-config <<
755 ifdef may-sync-config <<
756 # Read in dependencies to all Kconfig* files, <<
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 <<
816 # Tell gcc to never replace conditional load w <<
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 <<
821 KBUILD_CFLAGS += $(call cc-option,-fno-allow <<
822 endif <<
823 <<
824 ifdef CONFIG_READABLE_ASM <<
825 # Disable optimizations that make assembler li <<
826 # reorder blocks reorders the control in the f <<
827 # ipa clone creates specialized cloned functio <<
828 # partial inlining inlines only parts of funct <<
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- <<
830 endif <<
831 <<
832 stackp-flags-y <<
833 stackp-flags-$(CONFIG_STACKPROTECTOR) <<
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) <<
835 <<
836 KBUILD_CFLAGS += $(stackp-flags-y) <<
837 <<
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning <<
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) <<
840 <<
841 ifdef CONFIG_FRAME_POINTER <<
842 KBUILD_CFLAGS += -fno-omit-frame-pointer -fn <<
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y <<
844 else 354 else
845 # Some targets (ARM with Thumb2, for example), !! 355 ifeq ($(config-targets),1)
846 # pointers. For those, we don't have FUNCTION !! 356 # ===========================================================================
847 # select FRAME_POINTER. However, FUNCTION_TRA !! 357 # *config targets only - make sure prerequisites are updated, and descend
848 # incompatible with -fomit-frame-pointer with !! 358 # in scripts/kconfig to make the *config target
849 # -fomit-frame-pointer with FUNCTION_TRACER. <<
850 # In the Rust target specification, "frame-poi <<
851 # to "may-omit". <<
852 ifndef CONFIG_FUNCTION_TRACER <<
853 KBUILD_CFLAGS += -fomit-frame-pointer <<
854 endif <<
855 endif <<
856 <<
857 # Initialize all stack variables with a 0xAA p <<
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN <<
859 KBUILD_CFLAGS += -ftrivial-auto-var-init=pat <<
860 endif <<
861 <<
862 # Initialize all stack variables with a zero v <<
863 ifdef CONFIG_INIT_STACK_ALL_ZERO <<
864 KBUILD_CFLAGS += -ftrivial-auto-var-init=zer <<
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER <<
866 # https://github.com/llvm/llvm-project/issues/ <<
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 <<
871 endif <<
872 <<
873 # While VLAs have been removed, GCC produces u <<
874 # for the randomize_kstack_offset feature. Dis <<
875 KBUILD_CFLAGS += $(call cc-option, -fno-stac <<
876 <<
877 # Clear used registers at func exit (to reduce <<
878 ifdef CONFIG_ZERO_CALL_USED_REGS <<
879 KBUILD_CFLAGS += -fzero-call-used-regs=used- <<
880 endif <<
881 <<
882 ifdef CONFIG_FUNCTION_TRACER <<
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC <<
884 CC_FLAGS_FTRACE += -mrecord-mcount <<
885 ifdef CONFIG_HAVE_NOP_MCOUNT <<
886 ifeq ($(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 <<
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL <<
893 ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT <<
894 CC_FLAGS_USING += -DCC_USING_NOP_MCOU <<
895 endif <<
896 endif <<
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT <<
898 ifdef CONFIG_HAVE_C_RECORDMCOUNT <<
899 BUILD_C_RECORDMCOUNT := y <<
900 export BUILD_C_RECORDMCOUNT <<
901 endif <<
902 endif <<
903 ifdef CONFIG_HAVE_FENTRY <<
904 # s390-linux-gnu-gcc did not support -mfentr <<
905 ifeq ($(call cc-option-yn, -mfentry),y) <<
906 CC_FLAGS_FTRACE += -mfentry <<
907 CC_FLAGS_USING += -DCC_USING_FENTRY <<
908 endif <<
909 endif <<
910 export CC_FLAGS_FTRACE <<
911 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLA <<
912 KBUILD_AFLAGS += $(CC_FLAGS_USING) <<
913 endif <<
914 <<
915 # We trigger additional mismatches with less i <<
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH <<
917 KBUILD_CFLAGS += -fno-inline-functions-called- <<
918 endif <<
919 <<
920 # `rustc`'s `-Zfunction-sections` applies to d <<
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION <<
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f <<
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections <<
924 LDFLAGS_vmlinux += --gc-sections <<
925 endif <<
926 359
927 ifdef CONFIG_SHADOW_CALL_STACK !! 360 %config: scripts/fixdep FORCE
928 ifndef CONFIG_DYNAMIC_SCS !! 361 $(Q)$(MAKE) $(build)=scripts/kconfig $@
929 CC_FLAGS_SCS := -fsanitize=shadow-call-stac !! 362 config : scripts/fixdep FORCE
930 KBUILD_CFLAGS += $(CC_FLAGS_SCS) !! 363 $(Q)$(MAKE) $(build)=scripts/kconfig $@
931 endif <<
932 export CC_FLAGS_SCS <<
933 endif <<
934 364
935 ifdef CONFIG_LTO_CLANG <<
936 ifdef CONFIG_LTO_CLANG_THIN <<
937 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit <<
938 else 365 else
939 CC_FLAGS_LTO := -flto !! 366 # ===========================================================================
940 endif !! 367 # Build targets only - this includes vmlinux, arch specific targets, clean
941 CC_FLAGS_LTO += -fvisibility=hidden !! 368 # targets and others. In general all targets except *config targets.
942 <<
943 # Limit inlining across translation units to r <<
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 <<
945 endif <<
946 <<
947 ifdef CONFIG_LTO <<
948 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) <<
949 KBUILD_AFLAGS += -fno-lto <<
950 export CC_FLAGS_LTO <<
951 endif <<
952 369
953 ifdef CONFIG_CFI_CLANG !! 370 # That's our default target when none is given on the command line
954 CC_FLAGS_CFI := -fsanitize=kcfi !! 371 # Note that 'modules' will be added as a prerequisite as well,
955 KBUILD_CFLAGS += $(CC_FLAGS_CFI) !! 372 # in the CONFIG_MODULES part below
956 export CC_FLAGS_CFI <<
957 endif <<
958 373
959 # Architectures can define flags to add/remove !! 374 all: vmlinux
960 CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UN <<
961 export CC_FLAGS_FPU <<
962 export CC_FLAGS_NO_FPU <<
963 375
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0) !! 376 # Objects we will link into vmlinux / subdirs we need to visit
965 # Set the minimal function alignment. Use the !! 377 init-y := init/
966 # -fmin-function-alignment if it is available, !! 378 drivers-y := drivers/ sound/
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME !! 379 net-y := net/
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT !! 380 libs-y := lib/
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO !! 381 core-y := usr/
970 else !! 382 SUBDIRS :=
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU <<
972 endif <<
973 endif <<
974 383
975 # arch Makefile may override CC so keep this a !! 384 ifeq ($(dot-config),1)
976 NOSTDINC_FLAGS += -nostdinc !! 385 # In this section, we need .config
977 386
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 387 # Read in dependencies to all Kconfig* files, make sure to run
979 # the kernel uses only C99 flexible arrays for !! 388 # oldconfig if changes are detected.
980 # arrays. Enforce this for everything that may !! 389 -include .config.cmd
981 # perform bounds checking. <<
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl <<
983 390
984 #Currently, disable -Wstringop-overflow for GC !! 391 include .config
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW <<
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + <<
987 392
988 # disable invalid "can't wrap" optimizations f !! 393 # If .config needs to be updated, it will be done via the dependency
989 KBUILD_CFLAGS += -fno-strict-overflow !! 394 # that autoconf has on .config.
>> 395 # To avoid any implicit rule to kick in, define an empty command
>> 396 .config: ;
990 397
991 # Make sure -fstack-check isn't enabled (like !! 398 # If .config is newer than include/linux/autoconf.h, someone tinkered
992 KBUILD_CFLAGS += -fno-stack-check !! 399 # with it and forgot to run make oldconfig
>> 400 include/linux/autoconf.h: .config
>> 401 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
993 402
994 # conserve stack if available <<
995 ifdef CONFIG_CC_IS_GCC <<
996 KBUILD_CFLAGS += -fconserve-stack <<
997 endif 403 endif
998 404
999 # change __FILE__ to the relative path from th !! 405 include $(srctree)/arch/$(ARCH)/Makefile
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p <<
1001 406
1002 # include additional Makefiles when needed !! 407 # Let architecture Makefiles change CPPFLAGS if needed
1003 include-y := scripts/Ma !! 408 CFLAGS := $(CPPFLAGS) $(CFLAGS)
1004 include-$(CONFIG_DEBUG_INFO) += scripts/Ma !! 409 AFLAGS := $(CPPFLAGS) $(AFLAGS)
1005 include-$(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 410
1014 include $(addprefix $(srctree)/, $(include-y) !! 411 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
1015 412
1016 # scripts/Makefile.gcc-plugins is intentional !! 413 SUBDIRS += $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
1017 # Do not add $(call cc-option,...) below this !! 414 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1018 # from the clean source tree, the GCC plugins !! 415 $(net-y) $(net-m) $(libs-y) $(libs-m)))
1019 416
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS !! 417 ALL_SUBDIRS := $(sort $(SUBDIRS) $(patsubst %/,%,$(filter %/, \
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS) !! 418 $(init-n) $(init-) \
1022 KBUILD_AFLAGS += $(KAFLAGS) !! 419 $(core-n) $(core-) $(drivers-n) $(drivers-) \
1023 KBUILD_CFLAGS += $(KCFLAGS) !! 420 $(net-n) $(net-) $(libs-n) $(libs-))))
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS) <<
1025 421
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1 !! 422 init-y := $(patsubst %/, %/built-in.o, $(init-y))
1027 LDFLAGS_vmlinux += --build-id=sha1 !! 423 core-y := $(patsubst %/, %/built-in.o, $(core-y))
>> 424 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
>> 425 net-y := $(patsubst %/, %/built-in.o, $(net-y))
>> 426 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
>> 427 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
>> 428 libs-y := $(libs-y1) $(libs-y2)
1028 429
1029 KBUILD_LDFLAGS += -z noexecstack !! 430 # Here goes the main Makefile
1030 ifeq ($(CONFIG_LD_IS_BFD),y) !! 431 # ---------------------------------------------------------------------------
1031 KBUILD_LDFLAGS += $(call ld-option,--no-warn <<
1032 endif <<
1033 432
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) <<
1035 LDFLAGS_vmlinux += -X <<
1036 endif <<
1037 433
1038 ifeq ($(CONFIG_RELR),y) !! 434 ifndef CONFIG_FRAME_POINTER
1039 # ld.lld before 15 did not support -z pack-re !! 435 CFLAGS += -fomit-frame-pointer
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy <<
1041 endif 436 endif
1042 437
1043 # We never want expected sections to be place !! 438 ifdef CONFIG_DEBUG_INFO
1044 # linker. All sections should be explicitly n !! 439 CFLAGS += -g
1045 ifdef CONFIG_LD_ORPHAN_WARN <<
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG <<
1047 endif 440 endif
1048 441
1049 # Align the bit size of userspace programs wi !! 442 # warn about C99 declaration after statement
1050 KBUILD_USERCFLAGS += $(filter -m32 -m64 --ta !! 443 CFLAGS += $(call check_gcc,-Wdeclaration-after-statement,)
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta <<
1052 <<
1053 # make the checker run with the right archite <<
1054 CHECKFLAGS += --arch=$(ARCH) <<
1055 <<
1056 # insure the checker run with the right endia <<
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- <<
1058 <<
1059 # the checker needs the correct machine size <<
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) <<
1061 <<
1062 # Default kernel image to build when no speci <<
1063 # KBUILD_IMAGE may be overruled on the comman <<
1064 # set in the environment <<
1065 # Also any assignments in arch/$(ARCH)/Makefi <<
1066 # this default value <<
1067 export KBUILD_IMAGE ?= vmlinux <<
1068 444
1069 # 445 #
1070 # INSTALL_PATH specifies where to place the u 446 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i !! 447 # images. Uncomment if you want to place them anywhere other than root.
1072 export INSTALL_PATH ?= /boot <<
1073 <<
1074 # <<
1075 # INSTALL_DTBS_PATH specifies a prefix for re <<
1076 # Like INSTALL_MOD_PATH, it isn't defined in <<
1077 # an argument if needed. Otherwise it default <<
1078 # 448 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d !! 449
>> 450 #export INSTALL_PATH=/boot
1080 451
1081 # 452 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL 453 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots. This 454 # relocations required by build roots. This is not defined in the
1084 # makefile but the argument can be passed to !! 455 # makefile but the arguement can be passed to make if needed.
1085 # 456 #
1086 457
1087 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(K !! 458 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB 459 export MODLIB
1089 460
1090 PHONY += prepare0 !! 461 # Build vmlinux
1091 <<
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), <<
1093 export MODORDER := $(extmod_prefix)modules.or <<
1094 export MODULES_NSDEPS := $(extmod_prefix)modu <<
1095 <<
1096 ifeq ($(KBUILD_EXTMOD),) <<
1097 <<
1098 build-dir := . <<
1099 clean-dirs := $(sort . Documentation \ <<
1100 $(patsubst %/,%,$(filter <<
1101 $(drivers-) $(libs-)) <<
1102 <<
1103 export ARCH_CORE := $(core-y) <<
1104 export ARCH_LIB := $(filter %/, $(lib <<
1105 export ARCH_DRIVERS := $(drivers-y) $(dri <<
1106 # Externally visible symbols (used by link-vm <<
1107 <<
1108 KBUILD_VMLINUX_OBJS := ./built-in.a <<
1109 ifdef CONFIG_MODULES <<
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a <<
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib <<
1112 else <<
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, <<
1114 endif <<
1115 <<
1116 export KBUILD_VMLINUX_LIBS <<
1117 export KBUILD_LDS := arch/$(SRCARCH) <<
1118 <<
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS <<
1120 # For the kernel to actually contain only the <<
1121 # we have to build modules as well to determi <<
1122 KBUILD_MODULES := 1 <<
1123 endif <<
1124 <<
1125 # '$(AR) mPi' needs 'T' to workaround the bug <<
1126 quiet_cmd_ar_vmlinux.a = AR $@ <<
1127 cmd_ar_vmlinux.a = \ <<
1128 rm -f $@; \ <<
1129 $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS <<
1130 $(AR) mPiT $$($(AR) t $@ | sed -n 1p) <<
1131 <<
1132 targets += vmlinux.a <<
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea <<
1134 $(call if_changed,ar_vmlinux.a) <<
1135 <<
1136 PHONY += vmlinux_o <<
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) <<
1138 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1139 <<
1140 vmlinux.o modules.builtin.modinfo modules.bui <<
1141 @: <<
1142 <<
1143 PHONY += vmlinux <<
1144 # LDFLAGS_vmlinux in the top Makefile defines <<
1145 # not for decompressors. LDFLAGS_vmlinux in a <<
1146 # unrelated; the decompressors just happen to <<
1147 # arch/*/boot/compressed/vmlinux. <<
1148 # Export LDFLAGS_vmlinux only to scripts/Make <<
1149 # <<
1150 # _LDFLAGS_vmlinux is a workaround for the 'p <<
1151 # https://savannah.gnu.org/bugs/?61463 <<
1152 # For Make > 4.4, the following simple code w <<
1153 # vmlinux: private export LDFLAGS_vmlinux := <<
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG <<
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ <<
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost <<
1157 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1158 <<
1159 # The actual objects are generated when desce <<
1160 # make sure no implicit rule kicks in <<
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ <<
1162 <<
1163 ifeq ($(origin KERNELRELEASE),file) <<
1164 filechk_kernel.release = $(srctree)/scripts/s <<
1165 else <<
1166 filechk_kernel.release = echo $(KERNELRELEASE <<
1167 endif <<
1168 <<
1169 # Store (new) KERNELRELEASE string in include <<
1170 include/config/kernel.release: FORCE <<
1171 $(call filechk,kernel.release) <<
1172 <<
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 <<
1180 # Things we need to do before we recursively <<
1181 # or the modules are listed in "prepare". <<
1182 # A multi level approach is used. prepareN is <<
1183 # archprepare is used in arch Makefiles and w <<
1184 # version.h and scripts_basic is processed / <<
1185 <<
1186 PHONY += prepare archprepare <<
1187 <<
1188 archprepare: outputmakefile archheaders archs <<
1189 asm-generic $(version_h) include/gene <<
1190 include/generated/compile.h include/g <<
1191 <<
1192 prepare0: archprepare <<
1193 $(Q)$(MAKE) $(build)=scripts/mod <<
1194 $(Q)$(MAKE) $(build)=. prepare <<
1195 <<
1196 # All the preparing.. <<
1197 prepare: prepare0 <<
1198 ifdef CONFIG_RUST <<
1199 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1200 $(Q)$(MAKE) $(build)=rust <<
1201 endif <<
1202 <<
1203 PHONY += remove-stale-files <<
1204 remove-stale-files: <<
1205 $(Q)$(srctree)/scripts/remove-stale-f <<
1206 <<
1207 # Support for using generic headers in asm-ge <<
1208 asm-generic := -f $(srctree)/scripts/Makefile <<
1209 <<
1210 PHONY += asm-generic uapi-asm-generic <<
1211 asm-generic: uapi-asm-generic <<
1212 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC <<
1213 generic=include/asm-generic <<
1214 uapi-asm-generic: <<
1215 $(Q)$(MAKE) $(asm-generic)=arch/$(SRC <<
1216 generic=include/uapi/asm-generic <<
1217 <<
1218 # Generate some files <<
1219 # ------------------------------------------- 462 # ---------------------------------------------------------------------------
1220 463
1221 # KERNELRELEASE can change from a few differe !! 464 # This is a bit tricky: If we need to relink vmlinux, we want
1222 # needs to be updated, so this check is force !! 465 # the version number incremented, which means recompile init/version.o
1223 !! 466 # and relink init/init.o. However, we cannot do this during the
1224 uts_len := 64 !! 467 # normal descending-into-subdirs phase, since at that time
1225 define filechk_utsrelease.h !! 468 # we cannot yet know if we will need to relink vmlinux.
1226 if [ `echo -n "$(KERNELRELEASE)" | wc !! 469 # So we descend into init/ inside the rule for vmlinux again.
1227 echo '"$(KERNELRELEASE)" exceeds $( !! 470 head-y += $(HEAD)
1228 exit 1; !! 471 vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y)
1229 fi; !! 472
1230 echo \#define UTS_RELEASE \"$(KERNELR !! 473 quiet_cmd_vmlinux__ = LD $@
>> 474 define cmd_vmlinux__
>> 475 $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \
>> 476 --start-group \
>> 477 $(core-y) \
>> 478 $(libs-y) \
>> 479 $(drivers-y) \
>> 480 $(net-y) \
>> 481 --end-group \
>> 482 $(filter .tmp_kallsyms%,$^) \
>> 483 -o $@
1231 endef 484 endef
1232 485
1233 define filechk_version.h !! 486 # set -e makes the rule exit immediately on error
1234 if [ $(SUBLEVEL) -gt 255 ]; then <<
1235 echo \#define LINUX_VERSION_C <<
1236 expr $(VERSION) \* 65536 + $( <<
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 <<
1247 487
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 488 define rule_vmlinux__
1249 $(version_h): private SUBLEVEL := $(or $(SUBL !! 489 +set -e; \
1250 $(version_h): FORCE !! 490 $(if $(filter .tmp_kallsyms%,$^),, \
1251 $(call filechk,version.h) !! 491 echo ' GEN .version'; \
1252 !! 492 . $(srctree)/scripts/mkversion > .tmp_version; \
1253 include/generated/utsrelease.h: include/confi !! 493 mv -f .tmp_version .version; \
1254 $(call filechk,utsrelease.h) !! 494 $(MAKE) $(build)=init; \
>> 495 ) \
>> 496 $(if $($(quiet)cmd_vmlinux__), \
>> 497 echo ' $($(quiet)cmd_vmlinux__)' &&) \
>> 498 $(cmd_vmlinux__); \
>> 499 echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
>> 500 endef
1255 501
1256 filechk_compile.h = $(srctree)/scripts/mkcomp !! 502 define rule_vmlinux
1257 "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION !! 503 $(rule_vmlinux__); \
>> 504 $(NM) $@ | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > System.map
>> 505 endef
1258 506
1259 include/generated/compile.h: FORCE !! 507 LDFLAGS_vmlinux += -T arch/$(ARCH)/kernel/vmlinux.lds.s
1260 $(call filechk,compile.h) <<
1261 508
1262 PHONY += headerdep !! 509 # Generate section listing all symbols and add it into vmlinux
1263 headerdep: !! 510 # It's a three stage process:
1264 $(Q)find $(srctree)/include/ -name '* !! 511 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
1265 $(srctree)/scripts/headerdep.pl -I$(s !! 512 # empty
>> 513 # Running kallsyms on that gives us .tmp_kallsyms1.o with
>> 514 # the right size
>> 515 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
>> 516 # but due to the added section, some addresses have shifted
>> 517 # From here, we generate a correct .tmp_kallsyms2.o
>> 518 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
1266 519
1267 # ------------------------------------------- !! 520 ifdef CONFIG_KALLSYMS
1268 # Kernel headers <<
1269 521
1270 #Default location for installed headers !! 522 kallsyms.o := .tmp_kallsyms2.o
1271 export INSTALL_HDR_PATH = $(objtree)/usr <<
1272 523
1273 quiet_cmd_headers_install = INSTALL $(INSTALL !! 524 quiet_cmd_kallsyms = KSYM $@
1274 cmd_headers_install = \ !! 525 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) > $@
1275 mkdir -p $(INSTALL_HDR_PATH); \ <<
1276 rsync -mrl --include='*/' --include=' <<
1277 usr/include $(INSTALL_HDR_PATH) <<
1278 526
1279 PHONY += headers_install !! 527 .tmp_kallsyms1.o .tmp_kallsyms2.o: %.o: %.S scripts FORCE
1280 headers_install: headers !! 528 $(call if_changed_dep,as_o_S)
1281 $(call cmd,headers_install) <<
1282 529
1283 PHONY += archheaders archscripts !! 530 .tmp_kallsyms%.S: .tmp_vmlinux%
>> 531 $(call cmd,kallsyms)
1284 532
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he !! 533 .tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
>> 534 +$(call if_changed_rule,vmlinux__)
1286 535
1287 PHONY += headers !! 536 .tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
1288 headers: $(version_h) scripts_unifdef uapi-as !! 537 $(call if_changed_rule,vmlinux__)
1289 $(if $(filter um, $(SRCARCH)), $(erro <<
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi <<
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC <<
1292 538
1293 ifdef CONFIG_HEADERS_INSTALL <<
1294 prepare: headers <<
1295 endif 539 endif
1296 540
1297 PHONY += scripts_unifdef !! 541 # Finally the vmlinux rule
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 542
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH) !! 543 vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE
1310 cmd_install = unset sub_make_done; $(sr !! 544 $(call if_changed_rule,vmlinux)
1311 545
1312 # ------------------------------------------- !! 546 # The actual objects are generated when descending,
1313 # vDSO install !! 547 # make sure no implicit rule kicks in
1314 548
1315 PHONY += vdso_install !! 549 $(sort $(vmlinux-objs)) arch/$(ARCH)/kernel/vmlinux.lds.s: $(SUBDIRS) ;
1316 vdso_install: export INSTALL_FILES = $(vdso-i <<
1317 vdso_install: <<
1318 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1319 550
1320 # ------------------------------------------- !! 551 # Handle descending into subdirectories listed in $(SUBDIRS)
1321 # Tools <<
1322 552
1323 ifdef CONFIG_OBJTOOL !! 553 .PHONY: $(SUBDIRS)
1324 prepare: tools/objtool !! 554 $(SUBDIRS): prepare-all
1325 endif !! 555 $(Q)$(MAKE) $(build)=$@
1326 556
1327 ifdef CONFIG_BPF !! 557 # Things we need to do before we recursively start building the kernel
1328 ifdef CONFIG_DEBUG_INFO_BTF !! 558 # or the modules are listed in "prepare-all".
1329 prepare: tools/bpf/resolve_btfids !! 559 # A multi level approach is used. prepare1 is updated first, then prepare0.
1330 endif !! 560 # prepare-all is the collection point for the prepare targets.
>> 561
>> 562 .PHONY: prepare-all prepare prepare0 prepare1
>> 563
>> 564 # prepare1 is used to check if we are building in a separate output directory,
>> 565 # and if so do:
>> 566 # 1) Check that make has not been executed in the kernel src $(srctree)
>> 567 # 2) Create the include2 directory, used for the second asm symlink
>> 568
>> 569 prepare1:
>> 570 ifneq ($(KBUILD_SRC),)
>> 571 @echo ' Using $(srctree) as source for kernel'
>> 572 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \
>> 573 echo " $(srctree) is not clean, please run 'make mrproper'";\
>> 574 echo " in the '$(srctree)' directory.";\
>> 575 /bin/false; \
>> 576 fi;
>> 577 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
>> 578 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
>> 579 endif
>> 580
>> 581 prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER
>> 582 ifdef KBUILD_MODULES
>> 583 ifeq ($(origin SUBDIRS),file)
>> 584 $(Q)rm -rf $(MODVERDIR)
>> 585 else
>> 586 @echo '*** Warning: Overriding SUBDIRS on the command line can cause'
>> 587 @echo '*** inconsistencies'
1331 endif 588 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 589 endif
>> 590 $(if $(CONFIG_MODULES),$(Q)mkdir -p $(MODVERDIR))
1349 591
1350 # Clear a bunch of variables before executing !! 592 # All the preparing..
1351 ifeq ($(quiet),silent_) !! 593 prepare-all: prepare0 prepare
1352 tools_silent=s <<
1353 endif <<
1354 594
1355 tools/: FORCE !! 595 # Leave this as default for preprocessing vmlinux.lds.S, which is now
1356 $(Q)mkdir -p $(objtree)/tools !! 596 # done in arch/$(ARCH)/kernel/Makefile
1357 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1358 597
1359 tools/%: FORCE !! 598 export AFLAGS_vmlinux.lds.o += -P -C -U$(ARCH)
1360 $(Q)mkdir -p $(objtree)/tools <<
1361 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too <<
1362 599
>> 600 # Single targets
1363 # ------------------------------------------- 601 # ---------------------------------------------------------------------------
1364 # Kernel selftest <<
1365 602
1366 PHONY += kselftest !! 603 %.s: %.c scripts FORCE
1367 kselftest: headers !! 604 $(Q)$(MAKE) $(build)=$(@D) $@
1368 $(Q)$(MAKE) -C $(srctree)/tools/testi !! 605 %.i: %.c scripts FORCE
1369 !! 606 $(Q)$(MAKE) $(build)=$(@D) $@
1370 kselftest-%: headers FORCE !! 607 %.o: %.c scripts FORCE
1371 $(Q)$(MAKE) -C $(srctree)/tools/testi !! 608 $(Q)$(MAKE) $(build)=$(@D) $@
1372 !! 609 %/: scripts prepare FORCE
1373 PHONY += kselftest-merge !! 610 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
1374 kselftest-merge: !! 611 %.lst: %.c scripts FORCE
1375 $(if $(wildcard $(objtree)/.config),, !! 612 $(Q)$(MAKE) $(build)=$(@D) $@
1376 $(Q)find $(srctree)/tools/testing/sel !! 613 %.s: %.S scripts FORCE
1377 xargs $(srctree)/scripts/kcon !! 614 $(Q)$(MAKE) $(build)=$(@D) $@
1378 $(Q)$(MAKE) -f $(srctree)/Makefile ol !! 615 %.o: %.S scripts FORCE
>> 616 $(Q)$(MAKE) $(build)=$(@D) $@
>> 617
>> 618 # FIXME: The asm symlink changes when $(ARCH) changes. That's
>> 619 # hard to detect, but I suppose "make mrproper" is a good idea
>> 620 # before switching between archs anyway.
>> 621
>> 622 include/asm:
>> 623 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
>> 624 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
>> 625 @ln -fsn asm-$(ARCH) $@
>> 626
>> 627 # Split autoconf.h into include/linux/config/*
>> 628
>> 629 include/config/MARKER: scripts/split-include include/linux/autoconf.h
>> 630 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
>> 631 @scripts/split-include include/linux/autoconf.h include/config
>> 632 @touch $@
1379 633
>> 634 # Generate some files
1380 # ------------------------------------------- 635 # ---------------------------------------------------------------------------
1381 # Devicetree files <<
1382 636
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ !! 637 # version.h changes when $(KERNELRELEASE) etc change, as defined in
1384 dtstree := arch/$(SRCARCH)/boot/dts !! 638 # this Makefile
1385 endif <<
1386 639
1387 ifneq ($(dtstree),) !! 640 uts_len := 64
1388 641
1389 %.dtb: dtbs_prepare !! 642 define filechk_version.h
1390 $(Q)$(MAKE) $(build)=$(dtstree) $(dts !! 643 if expr length "$(KERNELRELEASE)" \> $(uts_len) >/dev/null ; then \
>> 644 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
>> 645 exit 1; \
>> 646 fi; \
>> 647 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
>> 648 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
>> 649 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
>> 650 )
>> 651 endef
1391 652
1392 %.dtbo: dtbs_prepare !! 653 include/linux/version.h: Makefile
1393 $(Q)$(MAKE) $(build)=$(dtstree) $(dts !! 654 $(call filechk,version.h)
1394 655
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 656 # ---------------------------------------------------------------------------
1396 dtbs: dtbs_prepare <<
1397 $(Q)$(MAKE) $(build)=$(dtstree) need- <<
1398 657
1399 # include/config/kernel.release is actually n !! 658 .PHONY: depend dep
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) !! 659 depend dep:
1401 # dtbs_install depend on it as dtbs_install m !! 660 @echo '*** Warning: make $@ is unnecessary now.'
1402 dtbs_prepare: include/config/kernel.release s <<
1403 661
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), !! 662 # ---------------------------------------------------------------------------
1405 export CHECK_DTBS=y !! 663 # Modules
1406 endif <<
1407 664
1408 ifneq ($(CHECK_DTBS),) !! 665 ifdef CONFIG_MODULES
1409 dtbs_prepare: dt_binding_schemas <<
1410 endif <<
1411 666
1412 dtbs_check: dtbs !! 667 # By default, build modules as well
1413 668
1414 dtbs_install: !! 669 all: modules
1415 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1416 670
1417 ifdef CONFIG_OF_EARLY_FLATTREE !! 671 # Build modules
1418 all: dtbs <<
1419 endif <<
1420 672
>> 673 .PHONY: modules
>> 674 modules: $(SUBDIRS) $(if $(KBUILD_BUILTIN),vmlinux)
>> 675 @echo ' Building modules, stage 2.';
>> 676 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
>> 677
>> 678 # Install modules
>> 679
>> 680 .PHONY: modules_install
>> 681 modules_install: _modinst_ _modinst_post
>> 682
>> 683 .PHONY: _modinst_
>> 684 _modinst_:
>> 685 @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \
>> 686 echo "Warning: you may need to install module-init-tools"; \
>> 687 echo "See http://www.codemonkey.org.uk/post-halloween-2.5.txt";\
>> 688 sleep 1; \
>> 689 fi
>> 690 @rm -rf $(MODLIB)/kernel
>> 691 @rm -f $(MODLIB)/build
>> 692 @mkdir -p $(MODLIB)/kernel
>> 693 @ln -s $(TOPDIR) $(MODLIB)/build
>> 694 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
>> 695
>> 696 # If System.map exists, run depmod. This deliberately does not have a
>> 697 # dependency on System.map since that would run the dependency tree on
>> 698 # vmlinux. This depmod is only for convenience to give the initial
>> 699 # boot a modules.dep even before / is mounted read-write. However the
>> 700 # boot script depmod is the master version.
>> 701 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
>> 702 depmod_opts :=
>> 703 else
>> 704 depmod_opts := -b $(INSTALL_MOD_PATH) -r
1421 endif 705 endif
>> 706 .PHONY: _modinst_post
>> 707 _modinst_post: _modinst_
>> 708 if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1422 709
1423 PHONY += scripts_dtc !! 710 else # CONFIG_MODULES
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 711
1431 PHONY += dt_binding_check dt_binding_schemas !! 712 # Modules not configured
1432 dt_binding_check: dt_binding_schemas scripts_ !! 713 # ---------------------------------------------------------------------------
1433 $(Q)$(MAKE) $(build)=Documentation/de <<
1434 714
1435 dt_binding_schemas: !! 715 modules modules_install: FORCE
1436 $(Q)$(MAKE) $(build)=Documentation/de !! 716 @echo
>> 717 @echo "The present kernel configuration has modules disabled."
>> 718 @echo "Type 'make config' and enable loadable module support."
>> 719 @echo "Then build a kernel with module support enabled."
>> 720 @echo
>> 721 @exit 1
1437 722
1438 PHONY += dt_compatible_check !! 723 endif # CONFIG_MODULES
1439 dt_compatible_check: dt_binding_schemas <<
1440 $(Q)$(MAKE) $(build)=Documentation/de <<
1441 724
>> 725 # Generate asm-offsets.h
1442 # ------------------------------------------- 726 # ---------------------------------------------------------------------------
1443 # Modules <<
1444 727
1445 ifdef CONFIG_MODULES !! 728 define filechk_gen-asm-offsets
>> 729 (set -e; \
>> 730 echo "#ifndef __ASM_OFFSETS_H__"; \
>> 731 echo "#define __ASM_OFFSETS_H__"; \
>> 732 echo "/*"; \
>> 733 echo " * DO NOT MODIFY."; \
>> 734 echo " *"; \
>> 735 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
>> 736 echo " *"; \
>> 737 echo " */"; \
>> 738 echo ""; \
>> 739 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
>> 740 echo ""; \
>> 741 echo "#endif" )
>> 742 endef
1446 743
1447 # By default, build modules as well <<
1448 744
1449 all: modules !! 745 ###
>> 746 # Cleaning is done on three levels.
>> 747 # make clean Delete all automatically generated files, including
>> 748 # tools and firmware.
>> 749 # make mrproper Delete the current configuration, and related files
>> 750 # Any core files spread around are deleted as well
>> 751 # make distclean Remove editor backup files, patch leftover files and the like
1450 752
1451 # When we're building modules with modversion !! 753 # Files removed with 'make clean'
1452 # the built-in objects during the descend as !! 754 CLEAN_FILES += vmlinux System.map MC*
1453 # make sure the checksums are up to date befo <<
1454 ifdef CONFIG_MODVERSIONS <<
1455 KBUILD_BUILTIN := 1 <<
1456 endif <<
1457 755
1458 # Build modules !! 756 # Files removed with 'make mrproper'
>> 757 MRPROPER_FILES += \
>> 758 include/linux/autoconf.h include/linux/version.h \
>> 759 .version .config .config.old config.in config.old \
>> 760 .menuconfig.log \
>> 761 include/asm \
>> 762 .hdepend include/linux/modversions.h \
>> 763 tags TAGS cscope* kernel.spec \
>> 764 .tmp*
>> 765
>> 766 # Directories removed with 'make mrproper'
>> 767 MRPROPER_DIRS += \
>> 768 $(MODVERDIR) \
>> 769 .tmp_export-objs \
>> 770 include/config \
>> 771 include/linux/modules \
>> 772 include2
>> 773
>> 774 # clean - Delete all intermediate files
1459 # 775 #
>> 776 clean-dirs += $(addprefix _clean_,$(ALL_SUBDIRS) Documentation/DocBook scripts)
>> 777 .PHONY: $(clean-dirs) clean archclean mrproper archmrproper distclean
>> 778 $(clean-dirs):
>> 779 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1460 780
1461 # *.ko are usually independent of vmlinux, bu !! 781 quiet_cmd_rmclean = RM $$(CLEAN_FILES)
1462 # is an exception. !! 782 cmd_rmclean = rm -f $(CLEAN_FILES)
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES !! 783 clean: archclean $(clean-dirs)
1464 KBUILD_BUILTIN := 1 !! 784 $(call cmd,rmclean)
1465 modules: vmlinux !! 785 @find . $(RCS_FIND_IGNORE) \
1466 endif !! 786 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
>> 787 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
>> 788 -type f -print | xargs rm -f
1467 789
1468 modules: modules_prepare !! 790 # mrproper - delete configuration + modules + core files
>> 791 #
>> 792 quiet_cmd_mrproper = RM $$(MRPROPER_DIRS) + $$(MRPROPER_FILES)
>> 793 cmd_mrproper = rm -rf $(MRPROPER_DIRS) && rm -f $(MRPROPER_FILES)
>> 794 mrproper distclean: clean archmrproper
>> 795 @echo ' Making $@ in the srctree'
>> 796 @find . $(RCS_FIND_IGNORE) \
>> 797 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
>> 798 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
>> 799 -o -name '.*.rej' -o -size 0 \
>> 800 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
>> 801 -type f -print | xargs rm -f
>> 802 $(call cmd,mrproper)
1469 803
1470 # Target to prepare building external modules !! 804 # Generate tags for editors
1471 modules_prepare: prepare !! 805 # ---------------------------------------------------------------------------
1472 $(Q)$(MAKE) $(build)=scripts scripts/ <<
1473 806
1474 endif # CONFIG_MODULES !! 807 define all-sources
>> 808 ( find . $(RCS_FIND_IGNORE) \
>> 809 \( -name include -o -name arch \) -prune -o \
>> 810 -name '*.[chS]' -print; \
>> 811 find arch/$(ARCH) $(RCS_FIND_IGNORE) \
>> 812 -name '*.[chS]' -print; \
>> 813 find include $(RCS_FIND_IGNORE) \
>> 814 \( -name config -o -name 'asm-*' \) -prune \
>> 815 -o -name '*.[chS]' -print; \
>> 816 find include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
>> 817 -name '*.[chS]' -print; \
>> 818 find include/asm-generic $(RCS_FIND_IGNORE) \
>> 819 -name '*.[chS]' -print )
>> 820 endef
1475 821
1476 ### !! 822 quiet_cmd_cscope = MAKE $@
1477 # Cleaning is done on three levels. !! 823 cmd_cscope = $(all-sources) | cscope -k -b -i -
1478 # make clean Delete most generated files <<
1479 # Leave enough to build extern <<
1480 # make mrproper Delete the current configura <<
1481 # make distclean Remove editor backup files, <<
1482 824
1483 # Directories & files removed with 'make clea !! 825 quiet_cmd_TAGS = MAKE $@
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 826 cmd_TAGS = $(all-sources) | etags -
1485 modules.builtin modules.builti <<
1486 compile_commands.json rust/tes <<
1487 rust-project.json .vmlinux.obj <<
1488 <<
1489 # Directories & files removed with 'make mrpr <<
1490 MRPROPER_FILES += include/config include/gene <<
1491 arch/$(SRCARCH)/include/gen <<
1492 debian snap tar-install PKG <<
1493 .config .config.old .versio <<
1494 Module.symvers \ <<
1495 certs/signing_key.pem \ <<
1496 certs/x509.genkey \ <<
1497 vmlinux-gdb.py \ <<
1498 rpmbuild \ <<
1499 rust/libmacros.so <<
1500 827
1501 # clean - Delete most, but leave enough to bu !! 828 # Exuberant ctags works better with -I
1502 # <<
1503 clean: private rm-files := $(CLEAN_FILES) <<
1504 829
1505 PHONY += archclean vmlinuxclean !! 830 quiet_cmd_tags = MAKE $@
>> 831 define cmd_tags
>> 832 rm -f $@; \
>> 833 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_NOVERS"`; \
>> 834 $(all-sources) | xargs ctags $$CTAGSF -a
>> 835 endef
1506 836
1507 vmlinuxclean: !! 837 cscope: FORCE
1508 $(Q)$(CONFIG_SHELL) $(srctree)/script !! 838 $(call cmd,cscope)
1509 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f <<
1510 839
1511 clean: archclean vmlinuxclean resolve_btfids_ !! 840 TAGS: FORCE
>> 841 $(call cmd,TAGS)
1512 842
1513 # mrproper - Delete all generated files, incl !! 843 tags: FORCE
1514 # !! 844 $(call cmd,tags)
1515 mrproper: private rm-files := $(MRPROPER_FILE <<
1516 mrproper-dirs := $(addprefix _mrproper_, <<
1517 845
1518 PHONY += $(mrproper-dirs) mrproper !! 846 # RPM target
1519 $(mrproper-dirs): !! 847 # ---------------------------------------------------------------------------
1520 $(Q)$(MAKE) $(clean)=$(patsubst _mrpr <<
1521 848
1522 mrproper: clean $(mrproper-dirs) !! 849 .PHONY: rpm
1523 $(call cmd,rmfiles) <<
1524 @find . $(RCS_FIND_IGNORE) \ <<
1525 \( -name '*.rmeta' \) \ <<
1526 -type f -print | xargs rm -f <<
1527 850
1528 # distclean !! 851 # Remove hyphens since they have special meaning in RPM filenames
1529 # !! 852 KERNELPATH=kernel-$(subst -,,$(KERNELRELEASE))
1530 PHONY += distclean <<
1531 853
1532 distclean: mrproper !! 854 # If you do a make spec before packing the tarball you can rpm -ta it
1533 @find . $(RCS_FIND_IGNORE) \ <<
1534 \( -name '*.orig' -o -name '* <<
1535 -o -name '*.bak' -o -name '#* <<
1536 -o -name 'core' -o -name tags <<
1537 -o -name GPATH -o -name GRTAG <<
1538 -type f -print | xargs rm -f <<
1539 855
>> 856 spec:
>> 857 $(CONFIG_SHELL) $(srctree)/scripts/mkspec > $(objtree)/kernel.spec
1540 858
1541 # Packaging of the kernel to various formats !! 859 # a) Build a tar ball
1542 # ------------------------------------------- !! 860 # b) generate an rpm from it
>> 861 # c) and pack the result
>> 862 # - Use /. to avoid tar packing just the symlink
>> 863
>> 864 rpm: clean spec
>> 865 set -e; \
>> 866 cd .. ; \
>> 867 ln -sf $(srctree) $(KERNELPATH) ; \
>> 868 tar -cvz $(RCS_TAR_IGNORE) -f $(KERNELPATH).tar.gz $(KERNELPATH)/. ; \
>> 869 rm $(KERNELPATH)
>> 870
>> 871 set -e; \
>> 872 $(CONFIG_SHELL) $(srctree)/scripts/mkversion > $(objtree)/.tmp_version;\
>> 873 mv -f $(objtree)/.tmp_version $(objtree)/.version;
1543 874
1544 %src-pkg: FORCE !! 875 $(RPM) -ta ../$(KERNELPATH).tar.gz
1545 $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 876 rm ../$(KERNELPATH).tar.gz
1546 %pkg: include/config/kernel.release FORCE <<
1547 $(Q)$(MAKE) -f $(srctree)/scripts/Mak <<
1548 877
1549 # Brief documentation of the typical targets 878 # Brief documentation of the typical targets used
1550 # ------------------------------------------- 879 # ---------------------------------------------------------------------------
1551 880
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC <<
1553 boards := $(sort $(notdir $(boards))) <<
1554 board-dirs := $(dir $(wildcard $(srctree)/arc <<
1555 board-dirs := $(sort $(notdir $(board-dirs:/= <<
1556 <<
1557 PHONY += help <<
1558 help: 881 help:
1559 @echo 'Cleaning targets:' 882 @echo 'Cleaning targets:'
1560 @echo ' clean - Remove mo !! 883 @echo ' clean - remove most generated files but keep the config'
1561 @echo ' enough bu !! 884 @echo ' mrproper - remove all generated files + config + various backup files'
1562 @echo ' mrproper - Remove al <<
1563 @echo ' distclean - mrproper <<
1564 @echo '' 885 @echo ''
>> 886 @echo 'Configuration targets:'
1565 @$(MAKE) -f $(srctree)/scripts/kconfi 887 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566 @echo '' 888 @echo ''
1567 @echo 'Other generic targets:' 889 @echo 'Other generic targets:'
1568 @echo ' all - Build all 890 @echo ' all - Build all targets marked with [*]'
1569 @echo '* vmlinux - Build the 891 @echo '* vmlinux - Build the bare kernel'
1570 @echo '* modules - Build all 892 @echo '* modules - Build all modules'
1571 @echo ' modules_install - Install a !! 893 @echo ' modules_install - Install all modules'
1572 @echo ' vdso_install - Install u <<
1573 @echo ' dir/ - Build all 894 @echo ' dir/ - Build all files in dir and below'
1574 @echo ' dir/file.[ois] - Build spe 895 @echo ' dir/file.[ois] - Build specified target only'
1575 @echo ' dir/file.ll - Build the !! 896 @echo ' rpm - Build a kernel as an RPM package'
1576 @echo ' (requires <<
1577 @echo ' dir/file.lst - Build spe <<
1578 @echo ' (requires <<
1579 @echo ' dir/file.ko - Build mod <<
1580 @echo ' modules_prepare - Set up fo <<
1581 @echo ' tags/TAGS - Generate 897 @echo ' tags/TAGS - Generate tags file for editors'
1582 @echo ' cscope - Generate <<
1583 @echo ' gtags - Generate <<
1584 @echo ' kernelrelease - Output th <<
1585 @echo ' kernelversion - Output th <<
1586 @echo ' image_name - Output th <<
1587 @echo ' headers_install - Install s <<
1588 echo ' (default: <<
1589 echo '' <<
1590 @echo 'Static analysers:' <<
1591 @echo ' checkstack - Generate <<
1592 @echo ' with a st <<
1593 @echo ' versioncheck - Sanity ch <<
1594 @echo ' includecheck - Check for <<
1595 @echo ' export_report - List the <<
1596 @echo ' headerdep - Detect in <<
1597 @echo ' coccicheck - Check wit <<
1598 @echo ' clang-analyzer - Check wit <<
1599 @echo ' clang-tidy - Check wit <<
1600 @echo '' <<
1601 @echo 'Tools:' <<
1602 @echo ' nsdeps - Generate <<
1603 @echo '' <<
1604 @echo 'Kernel selftest:' <<
1605 @echo ' kselftest - Build a <<
1606 @echo ' Build, <<
1607 @echo ' running <<
1608 @echo ' Run as <<
1609 @echo ' kselftest-all - Build k <<
1610 @echo ' kselftest-install - Build a <<
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 $(dtstree), \ <<
1634 echo 'Devicetree:'; \ <<
1635 echo '* dtbs - <<
1636 echo ' dtbs_install - <<
1637 echo ' dt_binding_check - <<
1638 echo ' dt_binding_schema - <<
1639 echo ' dtbs_check - <<
1640 echo '') <<
1641 <<
1642 @echo 'Userspace tools targets:' <<
1643 @echo ' use "make tools/help"' <<
1644 @echo ' or "cd tools; make help"' <<
1645 @echo '' <<
1646 @echo 'Kernel packaging:' <<
1647 @$(MAKE) -f $(srctree)/scripts/Makefi <<
1648 @echo '' 898 @echo ''
1649 @echo 'Documentation targets:' 899 @echo 'Documentation targets:'
1650 @$(MAKE) -f $(srctree)/Documentation/ !! 900 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1651 @echo '' 901 @echo ''
1652 @echo 'Architecture-specific targets !! 902 @echo 'Architecture specific targets ($(ARCH)):'
1653 @$(or $(archhelp),\ !! 903 @$(if $(archhelp),$(archhelp),\
1654 echo ' No architecture-speci !! 904 echo ' No architecture specific help defined for $(ARCH)')
1655 @echo '' 905 @echo ''
1656 @$(if $(boards), \ !! 906 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1657 $(foreach b, $(boards), \ <<
1658 printf " %-27s - Build for % <<
1659 echo '') <<
1660 @$(if $(board-dirs), \ <<
1661 $(foreach b, $(board-dirs), \ <<
1662 printf " %-16s - Show %s-spe <<
1663 printf " %-16s - Show all of <<
1664 echo '') <<
1665 <<
1666 @echo ' make V=n [targets] 1: ver <<
1667 @echo ' 2: giv <<
1668 @echo ' V=1 an <<
1669 @echo ' make O=dir [targets] Locate 907 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1670 @echo ' make C=1 [targets] Check !! 908 @echo ' make C=1 [targets] Check all c source with checker tool'
1671 @echo ' (spars <<
1672 @echo ' make C=2 [targets] Force <<
1673 @echo ' make RECORDMCOUNT_WARN=1 [t <<
1674 @echo ' make W=n [targets] Enable <<
1675 @echo ' 1: warnings w <<
1676 @echo ' 2: warnings w <<
1677 @echo ' 3: more obscu <<
1678 @echo ' c: extra chec <<
1679 @echo ' e: warnings a <<
1680 @echo ' Multiple leve <<
1681 @$(if $(dtstree), \ <<
1682 echo ' make CHECK_DTBS=1 [ta <<
1683 echo ' This can be ap <<
1684 ) <<
1685 @echo '' 909 @echo ''
1686 @echo 'Execute "make" or "make all" 910 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1687 @echo 'For further info see the ./RE 911 @echo 'For further info see the ./README file'
1688 912
1689 913
1690 help-board-dirs := $(addprefix help-,$(board- <<
1691 <<
1692 help-boards: $(help-board-dirs) <<
1693 <<
1694 boards-per-dir = $(sort $(notdir $(wildcard $ <<
1695 <<
1696 $(help-board-dirs): help-%: <<
1697 @echo 'Architecture-specific targets <<
1698 @$(if $(boards-per-dir), \ <<
1699 $(foreach b, $(boards-per-dir <<
1700 printf " %-24s - Build for % <<
1701 echo '') <<
1702 <<
1703 <<
1704 # Documentation targets 914 # Documentation targets
1705 # ------------------------------------------- 915 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html !! 916 %docs: scripts/docproc FORCE
1707 linkcheckdocs dochelp refcheck !! 917 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1708 PHONY += $(DOC_TARGETS) <<
1709 $(DOC_TARGETS): <<
1710 $(Q)$(MAKE) $(build)=Documentation $@ <<
1711 <<
1712 <<
1713 # Rust targets <<
1714 # ------------------------------------------- <<
1715 <<
1716 # "Is Rust available?" target <<
1717 PHONY += rustavailable <<
1718 rustavailable: <<
1719 +$(Q)$(CONFIG_SHELL) $(srctree)/scrip <<
1720 <<
1721 # Documentation target <<
1722 # <<
1723 # Using the singular to avoid running afoul o <<
1724 PHONY += rustdoc <<
1725 rustdoc: prepare <<
1726 $(Q)$(MAKE) $(build)=rust $@ <<
1727 <<
1728 # Testing target <<
1729 PHONY += rusttest <<
1730 rusttest: prepare <<
1731 $(Q)$(MAKE) $(build)=rust $@ <<
1732 <<
1733 # Formatting targets <<
1734 PHONY += rustfmt rustfmtcheck <<
1735 <<
1736 # We skip `rust/alloc` since we want to minim <<
1737 # <<
1738 # We match using absolute paths since `find` <<
1739 # when matching, which is a problem when e.g. <<
1740 # We `grep` afterwards in order to remove the <<
1741 rustfmt: <<
1742 $(Q)find $(abs_srctree) -type f -name <<
1743 -o -path $(abs_srctree)/rust/ <<
1744 -o -path $(abs_objtree)/rust/ <<
1745 | grep -Fv $(abs_srctree)/rus <<
1746 | grep -Fv $(abs_objtree)/rus <<
1747 | grep -Fv generated \ <<
1748 | xargs $(RUSTFMT) $(rustfmt_ <<
1749 <<
1750 rustfmtcheck: rustfmt_flags = --check <<
1751 rustfmtcheck: rustfmt <<
1752 <<
1753 # Misc <<
1754 # ------------------------------------------- <<
1755 <<
1756 PHONY += misc-check <<
1757 misc-check: <<
1758 $(Q)$(srctree)/scripts/misc-check <<
1759 <<
1760 all: misc-check <<
1761 <<
1762 PHONY += scripts_gdb <<
1763 scripts_gdb: prepare0 <<
1764 $(Q)$(MAKE) $(build)=scripts/gdb <<
1765 $(Q)ln -fsn $(abspath $(srctree)/scri <<
1766 <<
1767 ifdef CONFIG_GDB_SCRIPTS <<
1768 all: scripts_gdb <<
1769 endif <<
1770 <<
1771 else # KBUILD_EXTMOD <<
1772 <<
1773 filechk_kernel.release = echo $(KERNELRELEASE <<
1774 <<
1775 ### <<
1776 # External module support. <<
1777 # When building external modules the kernel u <<
1778 # read-only, and no consistency checks are ma <<
1779 # system is not used on the basis kernel. If <<
1780 # in the basis kernel ordinary make commands <<
1781 <<
1782 # We are always building only modules. <<
1783 KBUILD_BUILTIN := <<
1784 KBUILD_MODULES := 1 <<
1785 <<
1786 build-dir := $(KBUILD_EXTMOD) <<
1787 <<
1788 compile_commands.json: $(extmod_prefix)compil <<
1789 PHONY += compile_commands.json <<
1790 <<
1791 clean-dirs := $(KBUILD_EXTMOD) <<
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M <<
1793 $(KBUILD_EXTMOD)/compile_commands.jso <<
1794 <<
1795 PHONY += prepare <<
1796 # now expand this into a simple variable to r <<
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT <<
1798 prepare: <<
1799 @if [ "$(CC_VERSION_TEXT)" != "$(CONF <<
1800 echo >&2 "warning: the compil <<
1801 echo >&2 " The kernel was bu <<
1802 echo >&2 " You are using: <<
1803 fi <<
1804 <<
1805 PHONY += help <<
1806 help: <<
1807 @echo ' Building external modules.' <<
1808 @echo ' Syntax: make -C path/to/ker <<
1809 @echo '' <<
1810 @echo ' modules - default t <<
1811 @echo ' modules_install - install t <<
1812 @echo ' clean - remove ge <<
1813 @echo ' rust-analyzer - generate <<
1814 @echo '' <<
1815 <<
1816 ifndef CONFIG_MODULES <<
1817 modules modules_install: __external_modules_e <<
1818 __external_modules_error: <<
1819 @echo >&2 '***' <<
1820 @echo >&2 '*** The present kernel dis <<
1821 @echo >&2 '*** You cannot build or in <<
1822 @echo >&2 '***' <<
1823 @false <<
1824 endif <<
1825 <<
1826 endif # KBUILD_EXTMOD <<
1827 <<
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) <<
1934 $(call cmd,rmfiles) <<
1935 @find $(or $(KBUILD_EXTMOD), .) $(RCS <<
1936 \( -name '*.[aios]' -o -name <<
1937 -o -name '*.ko.*' \ <<
1938 -o -name '*.dtb' -o -name '*. <<
1939 -o -name '*.dtb.S' -o -name ' <<
1940 -o -name '*.dt.yaml' -o -name <<
1941 -o -name '*.dwo' -o -name '*. <<
1942 -o -name '*.su' -o -name '*.m <<
1943 -o -name '.*.d' -o -name '.*. <<
1944 -o -name '*.lex.c' -o -name ' <<
1945 -o -name '*.asn1.[ch]' \ <<
1946 -o -name '*.symtypes' -o -nam <<
1947 -o -name '*.c.[012]*.*' \ <<
1948 -o -name '*.ll' \ <<
1949 -o -name '*.gcno' \ <<
1950 -o -name '*.*.symversions' \) <<
1951 -o -name '.tmp_*' -print \ <<
1952 | xargs rm -rf <<
1953 <<
1954 # Generate tags for editors <<
1955 # ------------------------------------------- <<
1956 quiet_cmd_tags = GEN $@ <<
1957 cmd_tags = $(BASH) $(srctree)/scripts/t <<
1958 <<
1959 tags TAGS cscope gtags: FORCE <<
1960 $(call cmd,tags) <<
1961 <<
1962 # Generate rust-project.json (a file that des <<
1963 # Rust projects) for rust-analyzer (an implem <<
1964 # Protocol). <<
1965 PHONY += rust-analyzer <<
1966 rust-analyzer: <<
1967 +$(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 918
2005 # Scripts to check various things for consist 919 # Scripts to check various things for consistency
2006 # ------------------------------------------- 920 # ---------------------------------------------------------------------------
2007 921
2008 PHONY += includecheck versioncheck coccicheck !! 922 configcheck:
>> 923 find * $(RCS_FIND_IGNORE) \
>> 924 -name '*.[hcS]' -type f -print | sort \
>> 925 | xargs $(PERL) -w scripts/checkconfig.pl
2009 926
2010 includecheck: 927 includecheck:
2011 find $(srctree)/* $(RCS_FIND_IGNORE) !! 928 find * $(RCS_FIND_IGNORE) \
2012 -name '*.[hcS]' -type f -prin 929 -name '*.[hcS]' -type f -print | sort \
2013 | xargs $(PERL) -w $(srctree) !! 930 | xargs $(PERL) -w scripts/checkincludes.pl
2014 931
2015 versioncheck: 932 versioncheck:
2016 find $(srctree)/* $(RCS_FIND_IGNORE) !! 933 find * $(RCS_FIND_IGNORE) \
2017 -name '*.[hcS]' -type f -prin 934 -name '*.[hcS]' -type f -print | sort \
2018 | xargs $(PERL) -w $(srctree) !! 935 | xargs $(PERL) -w scripts/checkversion.pl
2019 <<
2020 coccicheck: <<
2021 $(Q)$(BASH) $(srctree)/scripts/$@ <<
2022 <<
2023 export_report: <<
2024 $(PERL) $(srctree)/scripts/export_rep <<
2025 <<
2026 PHONY += checkstack kernelrelease kernelversi <<
2027 <<
2028 # UML needs a little special treatment here. <<
2029 # toolchain, so needs $(SUBARCH) passed to ch <<
2030 # else wants $(ARCH), including people doing <<
2031 # that $(SUBARCH) doesn't work here. <<
2032 ifeq ($(ARCH), um) <<
2033 CHECKSTACK_ARCH := $(SUBARCH) <<
2034 else <<
2035 CHECKSTACK_ARCH := $(ARCH) <<
2036 endif <<
2037 MINSTACKSIZE ?= 100 <<
2038 checkstack: <<
2039 $(OBJDUMP) -d vmlinux $$(find . -name <<
2040 $(PERL) $(srctree)/scripts/checkstack <<
2041 936
2042 kernelrelease: !! 937 endif #ifeq ($(config-targets),1)
2043 @$(filechk_kernel.release) !! 938 endif #ifeq ($(mixed-targets),1)
2044 939
2045 kernelversion: !! 940 # FIXME Should go into a make.lib or something
2046 @echo $(KERNELVERSION) !! 941 # ===========================================================================
2047 <<
2048 image_name: <<
2049 @echo $(KBUILD_IMAGE) <<
2050 <<
2051 PHONY += run-command <<
2052 run-command: <<
2053 $(Q)$(KBUILD_RUN_COMMAND) <<
2054 <<
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file <<
2056 cmd_rmfiles = rm -rf $(rm-files) <<
2057 942
2058 # read saved command lines for existing targe !! 943 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
2059 existing-targets := $(wildcard $(sort $(targe !! 944 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
>> 945 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
>> 946
>> 947 quiet_cmd_as_o_S = AS $@
>> 948 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
>> 949
>> 950 # read all saved command lines
>> 951
>> 952 targets := $(wildcard $(sort $(targets)))
>> 953 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
>> 954
>> 955 ifneq ($(cmd_files),)
>> 956 $(cmd_files): ; # Do not try to update included dependency files
>> 957 include $(cmd_files)
>> 958 endif
>> 959
>> 960 # execute the command and also postprocess generated .d dependencies
>> 961 # file
>> 962
>> 963 if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
>> 964 $(filter-out $(cmd_$(1)),$(cmd_$@))\
>> 965 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
>> 966 @set -e; \
>> 967 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
>> 968 $(cmd_$(1)); \
>> 969 scripts/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
>> 970 rm -f $(depfile); \
>> 971 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
>> 972
>> 973 # Usage: $(call if_changed_rule,foo)
>> 974 # will check if $(cmd_foo) changed, or any of the prequisites changed,
>> 975 # and if so will execute $(rule_foo)
>> 976
>> 977 if_changed_rule = $(if $(strip $? \
>> 978 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
>> 979 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
>> 980 @$(rule_$(1)))
>> 981
>> 982 # If quiet is set, only print short version of command
>> 983
>> 984 cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
>> 985
>> 986 # filechk is used to check if the content of a generated file is updated.
>> 987 # Sample usage:
>> 988 # define filechk_sample
>> 989 # echo $KERNELRELEASE
>> 990 # endef
>> 991 # version.h : Makefile
>> 992 # $(call filechk,sample)
>> 993 # The rule defined shall write to stdout the content of the new file.
>> 994 # The existing file will be compared with the new one.
>> 995 # - If no file exist it is created
>> 996 # - If the content differ the new file is used
>> 997 # - If they are equal no change, and no timestamp update
>> 998
>> 999 define filechk
>> 1000 @set -e; \
>> 1001 echo ' CHK $@'; \
>> 1002 mkdir -p $(dir $@); \
>> 1003 $(filechk_$(1)) < $< > $@.tmp; \
>> 1004 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
>> 1005 rm -f $@.tmp; \
>> 1006 else \
>> 1007 echo ' UPD $@'; \
>> 1008 mv -f $@.tmp $@; \
>> 1009 fi
>> 1010 endef
2060 1011
2061 -include $(foreach f,$(existing-targets),$(di !! 1012 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
>> 1013 # Usage:
>> 1014 # $(Q)$(MAKE) $(build)=dir
>> 1015 build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
>> 1016
>> 1017 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
>> 1018 # Usage:
>> 1019 # $(Q)$(MAKE) $(clean)=dir
>> 1020 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
>> 1021
>> 1022 # $(call descend,<dir>,<target>)
>> 1023 # Recursively call a sub-make in <dir> with target <target>
>> 1024 # Usage is deprecated, because make does not see this as an invocation of make.
>> 1025 descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2)
2062 1026
2063 endif # config-build !! 1027 endif # skip-makefile
2064 endif # mixed-build <<
2065 endif # need-sub-make <<
2066 1028
2067 PHONY += FORCE <<
2068 FORCE: 1029 FORCE:
2069 <<
2070 # Declare the contents of the PHONY variable <<
2071 # information in a variable so we can use it <<
2072 .PHONY: $(PHONY) <<
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