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TOMOYO Linux Cross Reference
Linux/Makefile

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /Makefile (Version linux-6.12-rc7) and /Makefile (Version linux-4.11.12)


  1 # SPDX-License-Identifier: GPL-2.0             !!   1 VERSION = 4
  2 VERSION = 6                                    !!   2 PATCHLEVEL = 11
  3 PATCHLEVEL = 12                                !!   3 SUBLEVEL = 12
  4 SUBLEVEL = 0                                   !!   4 EXTRAVERSION =
  5 EXTRAVERSION = -rc7                            !!   5 NAME = Fearless Coyote
  6 NAME = Baby Opossum Posse                      << 
  7                                                     6 
  8 # *DOCUMENTATION*                                   7 # *DOCUMENTATION*
  9 # To see a list of typical targets execute "ma      8 # To see a list of typical targets execute "make help"
 10 # More info can be located in ./README              9 # More info can be located in ./README
 11 # Comments in this file are targeted only to t     10 # Comments in this file are targeted only to the developer, do not
 12 # expect to learn how to build the kernel read     11 # expect to learn how to build the kernel reading this file.
 13                                                    12 
 14 ifeq ($(filter output-sync,$(.FEATURES)),)     !!  13 # o Do not use make's built-in rules and variables
 15 $(error GNU Make >= 4.0 is required. Your Make !!  14 #   (this increases performance and avoids hard-to-debug behaviour);
 16 endif                                          !!  15 # o Look for make include files relative to root of kernel src
                                                   >>  16 MAKEFLAGS += -rR --include-dir=$(CURDIR)
 17                                                    17 
 18 $(if $(filter __%, $(MAKECMDGOALS)), \         !!  18 # Avoid funny character set dependencies
 19         $(error targets prefixed with '__' are !!  19 unexport LC_ALL
                                                   >>  20 LC_COLLATE=C
                                                   >>  21 LC_NUMERIC=C
                                                   >>  22 export LC_COLLATE LC_NUMERIC
 20                                                    23 
 21 # That's our default target when none is given !!  24 # Avoid interference with shell env settings
 22 PHONY := __all                                 !!  25 unexport GREP_OPTIONS
 23 __all:                                         << 
 24                                                    26 
 25 # We are using a recursive build, so we need t     27 # We are using a recursive build, so we need to do a little thinking
 26 # to get the ordering right.                       28 # to get the ordering right.
 27 #                                                  29 #
 28 # Most importantly: sub-Makefiles should only      30 # Most importantly: sub-Makefiles should only ever modify files in
 29 # their own directory. If in some directory we     31 # their own directory. If in some directory we have a dependency on
 30 # a file in another dir (which doesn't happen      32 # a file in another dir (which doesn't happen often, but it's often
 31 # unavoidable when linking the built-in.a targ !!  33 # unavoidable when linking the built-in.o targets which finally
 32 # turn into vmlinux), we will call a sub make      34 # turn into vmlinux), we will call a sub make in that other dir, and
 33 # after that we are sure that everything which     35 # after that we are sure that everything which is in that other dir
 34 # is now up to date.                               36 # is now up to date.
 35 #                                                  37 #
 36 # The only cases where we need to modify files     38 # The only cases where we need to modify files which have global
 37 # effects are thus separated out and done befo     39 # effects are thus separated out and done before the recursive
 38 # descending is started. They are now explicit     40 # descending is started. They are now explicitly listed as the
 39 # prepare rule.                                    41 # prepare rule.
 40                                                    42 
 41 this-makefile := $(lastword $(MAKEFILE_LIST))  << 
 42 abs_srctree := $(realpath $(dir $(this-makefil << 
 43 abs_objtree := $(CURDIR)                       << 
 44                                                << 
 45 ifneq ($(sub_make_done),1)                     << 
 46                                                << 
 47 # Do not use make's built-in rules and variabl << 
 48 # (this increases performance and avoids hard- << 
 49 MAKEFLAGS += -rR                               << 
 50                                                << 
 51 # Avoid funny character set dependencies       << 
 52 unexport LC_ALL                                << 
 53 LC_COLLATE=C                                   << 
 54 LC_NUMERIC=C                                   << 
 55 export LC_COLLATE LC_NUMERIC                   << 
 56                                                << 
 57 # Avoid interference with shell env settings   << 
 58 unexport GREP_OPTIONS                          << 
 59                                                << 
 60 # Beautify output                                  43 # Beautify output
 61 # --------------------------------------------     44 # ---------------------------------------------------------------------------
 62 #                                                  45 #
 63 # Most of build commands in Kbuild start with  !!  46 # Normally, we echo the whole command before executing it. By making
 64 # "quiet_cmd_*". If defined, the short log is  !!  47 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 65 # that command is printed by default.          !!  48 # $(quiet) to choose other forms of output instead, e.g.
 66 #                                              !!  49 #
 67 # e.g.)                                        !!  50 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)      !!  51 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 69 #          cmd_depmod = $(srctree)/scripts/dep !!  52 #
                                                   >>  53 # If $(quiet) is empty, the whole command will be printed.
                                                   >>  54 # If it is set to "quiet_", only the short version will be printed.
                                                   >>  55 # If it is set to "silent_", nothing will be printed at all, since
                                                   >>  56 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 70 #                                                  57 #
 71 # A simple variant is to prefix commands with      58 # A simple variant is to prefix commands with $(Q) - that's useful
 72 # for commands that shall be hidden in non-ver     59 # for commands that shall be hidden in non-verbose mode.
 73 #                                                  60 #
 74 #    $(Q)$(MAKE) $(build)=scripts/basic        !!  61 #       $(Q)ln $@ :<
 75 #                                                  62 #
 76 # If KBUILD_VERBOSE contains 1, the whole comm !!  63 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 77 # If KBUILD_VERBOSE contains 2, the reason for !!  64 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 78 #                                                  65 #
 79 # To put more focus on warnings, be less verbo     66 # To put more focus on warnings, be less verbose as default
 80 # Use 'make V=1' to see the full commands          67 # Use 'make V=1' to see the full commands
 81                                                    68 
 82 ifeq ("$(origin V)", "command line")               69 ifeq ("$(origin V)", "command line")
 83   KBUILD_VERBOSE = $(V)                            70   KBUILD_VERBOSE = $(V)
 84 endif                                              71 endif
                                                   >>  72 ifndef KBUILD_VERBOSE
                                                   >>  73   KBUILD_VERBOSE = 0
                                                   >>  74 endif
 85                                                    75 
 86 quiet = quiet_                                 !!  76 ifeq ($(KBUILD_VERBOSE),1)
 87 Q = @                                          << 
 88                                                << 
 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)    << 
 90   quiet =                                          77   quiet =
 91   Q =                                              78   Q =
                                                   >>  79 else
                                                   >>  80   quiet=quiet_
                                                   >>  81   Q = @
 92 endif                                              82 endif
 93                                                    83 
 94 # If the user is running make -s (silent mode)     84 # If the user is running make -s (silent mode), suppress echoing of
 95 # commands                                         85 # commands
 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS << 
 97 quiet=silent_                                  << 
 98 override KBUILD_VERBOSE :=                     << 
 99 endif                                          << 
100                                                << 
101 export quiet Q KBUILD_VERBOSE                  << 
102                                                << 
103 # Call a source code checker (by default, "spa << 
104 # C compilation.                               << 
105 #                                              << 
106 # Use 'make C=1' to enable checking of only re << 
107 # Use 'make C=2' to enable checking of *all* s << 
108 # of whether they are re-compiled or not.      << 
109 #                                              << 
110 # See the file "Documentation/dev-tools/sparse << 
111 # including where to get the "sparse" utility. << 
112                                                << 
113 ifeq ("$(origin C)", "command line")           << 
114   KBUILD_CHECKSRC = $(C)                       << 
115 endif                                          << 
116 ifndef KBUILD_CHECKSRC                         << 
117   KBUILD_CHECKSRC = 0                          << 
118 endif                                          << 
119                                                << 
120 export KBUILD_CHECKSRC                         << 
121                                                << 
122 # Enable "clippy" (a linter) as part of the Ru << 
123 #                                              << 
124 # Use 'make CLIPPY=1' to enable it.            << 
125 ifeq ("$(origin CLIPPY)", "command line")      << 
126   KBUILD_CLIPPY := $(CLIPPY)                   << 
127 endif                                          << 
128                                                << 
129 export KBUILD_CLIPPY                           << 
130                                                << 
131 # Use make M=dir or set the environment variab << 
132 # directory of external module to build. Setti << 
133 ifeq ("$(origin M)", "command line")           << 
134   KBUILD_EXTMOD := $(M)                        << 
135 endif                                          << 
136                                                    86 
137 $(if $(word 2, $(KBUILD_EXTMOD)), \            !!  87 ifneq ($(filter 4.%,$(MAKE_VERSION)),)  # make-4
138         $(error building multiple external mod !!  88 ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
139                                                !!  89   quiet=silent_
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI !!  90   tools_silent=s
141         $(error module directory path cannot c !!  91 endif
142                                                !!  92 else                                    # make-3.8x
143 # Remove trailing slashes                      !!  93 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)        !!  94   quiet=silent_
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM !!  95   tools_silent=-s
146 endif                                              96 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                                              97 endif
156                                                    98 
157 export KBUILD_EXTRA_WARN                       !!  99 export quiet Q KBUILD_VERBOSE
158                                                   100 
159 # Kbuild will save output files in the current !! 101 # kbuild supports saving output files in a separate directory.
160 # This does not need to match to the root of t !! 102 # To locate output files in a separate directory two syntaxes are supported.
161 #                                              !! 103 # In both cases the working directory must be the root of the kernel src.
162 # For example, you can do this:                << 
163 #                                              << 
164 #  cd /dir/to/store/output/files; make -f /dir << 
165 #                                              << 
166 # If you want to save output files in a differ << 
167 # two syntaxes to specify it.                  << 
168 #                                              << 
169 # 1) O=                                           104 # 1) O=
170 # Use "make O=dir/to/store/output/files/"         105 # Use "make O=dir/to/store/output/files/"
171 #                                                 106 #
172 # 2) Set KBUILD_OUTPUT                            107 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t !! 108 # Set the environment variable KBUILD_OUTPUT to point to the directory
174 # export KBUILD_OUTPUT=dir/to/store/output/fil !! 109 # where the output files shall be placed.
                                                   >> 110 # export KBUILD_OUTPUT=dir/to/store/output/files/
                                                   >> 111 # make
175 #                                                 112 #
176 # The O= assignment takes precedence over the     113 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable.                                       114 # variable.
178                                                   115 
179 # Do we want to change the working directory?  !! 116 # KBUILD_SRC is set on invocation of make in OBJ directory
                                                   >> 117 # KBUILD_SRC is not intended to be used by the regular user (for now)
                                                   >> 118 ifeq ($(KBUILD_SRC),)
                                                   >> 119 
                                                   >> 120 # OK, Make called in directory where kernel src resides
                                                   >> 121 # Do we want to locate output files in a separate directory?
180 ifeq ("$(origin O)", "command line")              122 ifeq ("$(origin O)", "command line")
181   KBUILD_OUTPUT := $(O)                           123   KBUILD_OUTPUT := $(O)
182 endif                                             124 endif
183                                                   125 
184 ifneq ($(KBUILD_OUTPUT),)                      !! 126 # That's our default target when none is given on the command line
185 # $(realpath ...) gets empty if the path does  !! 127 PHONY := _all
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")           !! 128 _all:
187 # $(realpath ...) resolves symlinks            << 
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))    << 
189 $(if $(abs_objtree),,$(error failed to create  << 
190 endif # ifneq ($(KBUILD_OUTPUT),)              << 
191                                                << 
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 << 
193 $(error source directory cannot contain spaces << 
194 endif                                          << 
195                                                << 
196 export sub_make_done := 1                      << 
197                                                << 
198 endif # sub_make_done                          << 
199                                                   129 
200 ifeq ($(abs_objtree),$(CURDIR))                !! 130 # Cancel implicit rules on top Makefile
201 # Suppress "Entering directory ..." if we are  !! 131 $(CURDIR)/Makefile Makefile: ;
202 no-print-directory := --no-print-directory     << 
203 else                                           << 
204 # Recursion to show "Entering directory ..."   << 
205 need-sub-make := 1                             << 
206 endif                                          << 
207                                                   132 
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 133 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
209 # If --no-print-directory is unset, recurse on !! 134   $(error main directory cannot contain spaces nor colons)
210 # You may end up recursing into __sub-make twi << 
211 # behavior change in GNU Make 4.4.1.           << 
212 need-sub-make := 1                             << 
213 endif                                             135 endif
214                                                   136 
215 ifeq ($(need-sub-make),1)                      !! 137 ifneq ($(KBUILD_OUTPUT),)
                                                   >> 138 # Invoke a second make in the output directory, passing relevant variables
                                                   >> 139 # check that the output directory actually exists
                                                   >> 140 saved-output := $(KBUILD_OUTPUT)
                                                   >> 141 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
                                                   >> 142                                                                 && /bin/pwd)
                                                   >> 143 $(if $(KBUILD_OUTPUT),, \
                                                   >> 144      $(error failed to create output directory "$(saved-output)"))
216                                                   145 
217 PHONY += $(MAKECMDGOALS) __sub-make            !! 146 PHONY += $(MAKECMDGOALS) sub-make
218                                                   147 
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 148 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
220         @:                                        149         @:
221                                                   150 
222 # Invoke a second make in the output directory !! 151 sub-make:
223 __sub-make:                                    !! 152         $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
224         $(Q)$(MAKE) $(no-print-directory) -C $ !! 153         -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
225         -f $(abs_srctree)/Makefile $(MAKECMDGO << 
226                                                   154 
227 else # need-sub-make                           !! 155 # Leave processing to above invocation of make
                                                   >> 156 skip-makefile := 1
                                                   >> 157 endif # ifneq ($(KBUILD_OUTPUT),)
                                                   >> 158 endif # ifeq ($(KBUILD_SRC),)
228                                                   159 
229 # We process the rest of the Makefile if this     160 # We process the rest of the Makefile if this is the final invocation of make
                                                   >> 161 ifeq ($(skip-makefile),)
230                                                   162 
231 ifeq ($(abs_srctree),$(abs_objtree))           !! 163 # Do not print "Entering directory ...",
232         # building in the source tree          !! 164 # but we want to display it when entering to the output directory
233         srctree := .                           !! 165 # so that IDEs/editors are able to understand relative filenames.
234         building_out_of_srctree :=             !! 166 MAKEFLAGS += --no-print-directory
235 else                                           << 
236         ifeq ($(abs_srctree)/,$(dir $(abs_objt << 
237                 # building in a subdirectory o << 
238                 srctree := ..                  << 
239         else                                   << 
240                 srctree := $(abs_srctree)      << 
241         endif                                  << 
242         building_out_of_srctree := 1           << 
243 endif                                          << 
244                                                << 
245 ifneq ($(KBUILD_ABS_SRCTREE),)                 << 
246 srctree := $(abs_srctree)                      << 
247 endif                                          << 
248                                                   167 
249 objtree         := .                           !! 168 # Call a source code checker (by default, "sparse") as part of the
250                                                !! 169 # C compilation.
251 VPATH           :=                             !! 170 #
                                                   >> 171 # Use 'make C=1' to enable checking of only re-compiled files.
                                                   >> 172 # Use 'make C=2' to enable checking of *all* source files, regardless
                                                   >> 173 # of whether they are re-compiled or not.
                                                   >> 174 #
                                                   >> 175 # See the file "Documentation/sparse.txt" for more details, including
                                                   >> 176 # where to get the "sparse" utility.
252                                                   177 
253 ifeq ($(KBUILD_EXTMOD),)                       !! 178 ifeq ("$(origin C)", "command line")
254 ifdef building_out_of_srctree                  !! 179   KBUILD_CHECKSRC = $(C)
255 VPATH           := $(srctree)                  << 
256 endif                                          << 
257 endif                                             180 endif
258                                                !! 181 ifndef KBUILD_CHECKSRC
259 export building_out_of_srctree srctree objtree !! 182   KBUILD_CHECKSRC = 0
260                                                << 
261 # To make sure we do not include .config for a << 
262 # catch them early, and hand them over to scri << 
263 # It is allowed to specify more targets when c << 
264 # mixing *config targets and build targets.    << 
265 # For example 'make oldconfig all'.            << 
266 # Detect when mixed targets is specified, and  << 
267 # of make so .config is not included in this c << 
268                                                << 
269 version_h := include/generated/uapi/linux/vers << 
270                                                << 
271 clean-targets := %clean mrproper cleandocs     << 
272 no-dot-config-targets := $(clean-targets) \    << 
273                          cscope gtags TAGS tag << 
274                          $(version_h) headers  << 
275                          %asm-generic kernelve << 
276                          outputmakefile rustav << 
277 no-sync-config-targets := $(no-dot-config-targ << 
278                           image_name           << 
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls << 
280                                                << 
281 config-build    :=                             << 
282 mixed-build     :=                             << 
283 need-config     := 1                           << 
284 may-sync-config := 1                           << 
285 single-build    :=                             << 
286                                                << 
287 ifneq ($(filter $(no-dot-config-targets), $(MA << 
288     ifeq ($(filter-out $(no-dot-config-targets << 
289         need-config :=                         << 
290     endif                                      << 
291 endif                                             183 endif
292                                                   184 
293 ifneq ($(filter $(no-sync-config-targets), $(M !! 185 # Use make M=dir to specify directory of external module to build
294     ifeq ($(filter-out $(no-sync-config-target !! 186 # Old syntax make ... SUBDIRS=$PWD is still supported
295         may-sync-config :=                     !! 187 # Setting the environment variable KBUILD_EXTMOD take precedence
296     endif                                      !! 188 ifdef SUBDIRS
                                                   >> 189   KBUILD_EXTMOD ?= $(SUBDIRS)
297 endif                                             190 endif
298                                                   191 
299 need-compiler := $(may-sync-config)            !! 192 ifeq ("$(origin M)", "command line")
300                                                !! 193   KBUILD_EXTMOD := $(M)
301 ifneq ($(KBUILD_EXTMOD),)                      << 
302     may-sync-config :=                         << 
303 endif                                             194 endif
304                                                   195 
                                                   >> 196 # If building an external module we do not care about the all: rule
                                                   >> 197 # but instead _all depend on modules
                                                   >> 198 PHONY += all
305 ifeq ($(KBUILD_EXTMOD),)                          199 ifeq ($(KBUILD_EXTMOD),)
306     ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 200 _all: all
307         config-build := 1                      !! 201 else
308         ifneq ($(words $(MAKECMDGOALS)),1)     !! 202 _all: modules
309             mixed-build := 1                   << 
310         endif                                  << 
311     endif                                      << 
312 endif                                          << 
313                                                << 
314 # We cannot build single targets and the other << 
315 ifneq ($(filter $(single-targets), $(MAKECMDGO << 
316     single-build := 1                          << 
317     ifneq ($(filter-out $(single-targets), $(M << 
318         mixed-build := 1                       << 
319     endif                                      << 
320 endif                                          << 
321                                                << 
322 # For "make -j clean all", "make -j mrproper d << 
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL << 
324     ifneq ($(filter-out $(clean-targets),$(MAK << 
325         mixed-build := 1                       << 
326     endif                                      << 
327 endif                                             203 endif
328                                                   204 
329 # install and modules_install need also be pro !! 205 ifeq ($(KBUILD_SRC),)
330 ifneq ($(filter install,$(MAKECMDGOALS)),)     !! 206         # building in the source tree
331     ifneq ($(filter modules_install,$(MAKECMDG !! 207         srctree := .
332         mixed-build := 1                       !! 208 else
333     endif                                      !! 209         ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
                                                   >> 210                 # building in a subdirectory of the source tree
                                                   >> 211                 srctree := ..
                                                   >> 212         else
                                                   >> 213                 srctree := $(KBUILD_SRC)
                                                   >> 214         endif
334 endif                                             215 endif
                                                   >> 216 objtree         := .
                                                   >> 217 src             := $(srctree)
                                                   >> 218 obj             := $(objtree)
335                                                   219 
336 ifdef mixed-build                              !! 220 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
337 # ============================================ << 
338 # We're called with mixed targets (*config and << 
339 # Handle them one by one.                      << 
340                                                << 
341 PHONY += $(MAKECMDGOALS) __build_one_by_one    << 
342                                                << 
343 $(MAKECMDGOALS): __build_one_by_one            << 
344         @:                                     << 
345                                                << 
346 __build_one_by_one:                            << 
347         $(Q)set -e; \                          << 
348         for i in $(MAKECMDGOALS); do \         << 
349                 $(MAKE) -f $(srctree)/Makefile << 
350         done                                   << 
351                                                << 
352 else # !mixed-build                            << 
353                                                << 
354 include $(srctree)/scripts/Kbuild.include      << 
355                                                   221 
356 # Read KERNELRELEASE from include/config/kerne !! 222 export srctree objtree VPATH
357 KERNELRELEASE = $(call read-file, include/conf << 
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. << 
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA << 
360                                                   223 
361 include $(srctree)/scripts/subarch.include     !! 224 # SUBARCH tells the usermode build what the underlying arch is.  That is set
                                                   >> 225 # first, and if a usermode build is happening, the "ARCH=um" on the command
                                                   >> 226 # line overrides the setting of ARCH below.  If a native build is happening,
                                                   >> 227 # then ARCH is assigned, getting whatever value it gets normally, and
                                                   >> 228 # SUBARCH is subsequently ignored.
                                                   >> 229 
                                                   >> 230 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
                                                   >> 231                                   -e s/sun4u/sparc64/ \
                                                   >> 232                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
                                                   >> 233                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
                                                   >> 234                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
                                                   >> 235                                   -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
362                                                   236 
363 # Cross compiling and selecting different set     237 # Cross compiling and selecting different set of gcc/bin-utils
364 # --------------------------------------------    238 # ---------------------------------------------------------------------------
365 #                                                 239 #
366 # When performing cross compilation for other     240 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for     241 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make:      242 # ARCH can be set during invocation of make:
369 # make ARCH=arm64                              !! 243 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir    244 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e    245 # The default ARCH is the host where make is executed.
372                                                   246 
373 # CROSS_COMPILE specify the prefix used for al    247 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin    248 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE).             249 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line    250 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu-        !! 251 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th    252 # Alternatively CROSS_COMPILE can be set in the environment.
                                                   >> 253 # A third alternative is to store a setting in .config so that plain
                                                   >> 254 # "make" in the configured kernel build directory always uses that.
379 # Default value for CROSS_COMPILE is not to pr    255 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL    256 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH            ?= $(SUBARCH)                     257 ARCH            ?= $(SUBARCH)
                                                   >> 258 CROSS_COMPILE   ?= $(CONFIG_CROSS_COMPILE:"%"=%)
382                                                   259 
383 # Architecture as present in compile.h            260 # Architecture as present in compile.h
384 UTS_MACHINE     := $(ARCH)                        261 UTS_MACHINE     := $(ARCH)
385 SRCARCH         := $(ARCH)                        262 SRCARCH         := $(ARCH)
386                                                   263 
387 # Additional ARCH settings for x86                264 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386)                               265 ifeq ($(ARCH),i386)
389         SRCARCH := x86                            266         SRCARCH := x86
390 endif                                             267 endif
391 ifeq ($(ARCH),x86_64)                             268 ifeq ($(ARCH),x86_64)
392         SRCARCH := x86                            269         SRCARCH := x86
393 endif                                             270 endif
394                                                   271 
395 # Additional ARCH settings for sparc              272 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32)                            273 ifeq ($(ARCH),sparc32)
397        SRCARCH := sparc                           274        SRCARCH := sparc
398 endif                                             275 endif
399 ifeq ($(ARCH),sparc64)                            276 ifeq ($(ARCH),sparc64)
400        SRCARCH := sparc                           277        SRCARCH := sparc
401 endif                                             278 endif
402                                                   279 
403 # Additional ARCH settings for parisc          !! 280 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64)                        !! 281 ifeq ($(ARCH),sh64)
405        SRCARCH := parisc                       !! 282        SRCARCH := sh
406 endif                                             283 endif
407                                                   284 
408 export cross_compiling :=                      !! 285 # Additional ARCH settings for tile
409 ifneq ($(SRCARCH),$(SUBARCH))                  !! 286 ifeq ($(ARCH),tilepro)
410 cross_compiling := 1                           !! 287        SRCARCH := tile
411 endif                                             288 endif
                                                   >> 289 ifeq ($(ARCH),tilegx)
                                                   >> 290        SRCARCH := tile
                                                   >> 291 endif
                                                   >> 292 
                                                   >> 293 # Where to locate arch specific headers
                                                   >> 294 hdr-arch  := $(SRCARCH)
412                                                   295 
413 KCONFIG_CONFIG  ?= .config                        296 KCONFIG_CONFIG  ?= .config
414 export KCONFIG_CONFIG                             297 export KCONFIG_CONFIG
415                                                   298 
416 # SHELL used by kbuild                            299 # SHELL used by kbuild
417 CONFIG_SHELL := sh                             !! 300 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
                                                   >> 301           else if [ -x /bin/bash ]; then echo /bin/bash; \
                                                   >> 302           else echo sh; fi ; fi)
                                                   >> 303 
                                                   >> 304 HOSTCC       = gcc
                                                   >> 305 HOSTCXX      = g++
                                                   >> 306 HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
                                                   >> 307 HOSTCXXFLAGS = -O2
                                                   >> 308 
                                                   >> 309 ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
                                                   >> 310 HOSTCFLAGS  += -Wno-unused-value -Wno-unused-parameter \
                                                   >> 311                 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
                                                   >> 312 endif
418                                                   313 
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS  !! 314 # Decide whether to build built-in, modular, or both.
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG !! 315 # Normally, just do built-in.
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d !! 316 
                                                   >> 317 KBUILD_MODULES :=
                                                   >> 318 KBUILD_BUILTIN := 1
                                                   >> 319 
                                                   >> 320 # If we have only "make modules", don't compile built-in objects.
                                                   >> 321 # When we're building modules with modversions, we need to consider
                                                   >> 322 # the built-in objects during the descend as well, in order to
                                                   >> 323 # make sure the checksums are up to date before we record them.
422                                                   324 
423 ifneq ($(LLVM),)                               !! 325 ifeq ($(MAKECMDGOALS),modules)
424 ifneq ($(filter %/,$(LLVM)),)                  !! 326   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
425 LLVM_PREFIX := $(LLVM)                         << 
426 else ifneq ($(filter -%,$(LLVM)),)             << 
427 LLVM_SUFFIX := $(LLVM)                         << 
428 endif                                             327 endif
429                                                   328 
430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)    !! 329 # If we have "make <whatever> modules", compile modules
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)  !! 330 # in addition to whatever we do anyway.
432 else                                           !! 331 # Just "make" or "make all" shall build modules as well
433 HOSTCC  = gcc                                  !! 332 
434 HOSTCXX = g++                                  !! 333 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
                                                   >> 334   KBUILD_MODULES := 1
435 endif                                             335 endif
436 HOSTRUSTC = rustc                              << 
437 HOSTPKG_CONFIG  = pkg-config                   << 
438                                                   336 
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 337 ifeq ($(MAKECMDGOALS),)
440                          -O2 -fomit-frame-poin !! 338   KBUILD_MODULES := 1
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) !! 339 endif
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)           !! 340 
443                                                !! 341 export KBUILD_MODULES KBUILD_BUILTIN
444 # These flags apply to all Rust code in the tr !! 342 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
445 # host programs.                               !! 343 
446 export rust_common_flags := --edition=2021 \   !! 344 # We need some generic definitions (do not try to remake the file).
447                             -Zbinary_dep_depin !! 345 scripts/Kbuild.include: ;
448                             -Astable_features  !! 346 include scripts/Kbuild.include
449                             -Dunsafe_op_in_uns << 
450                             -Dnon_ascii_idents << 
451                             -Wrust_2018_idioms << 
452                             -Wunreachable_pub  << 
453                             -Wmissing_docs \   << 
454                             -Wrustdoc::missing << 
455                             -Wclippy::all \    << 
456                             -Wclippy::mut_mut  << 
457                             -Wclippy::needless << 
458                             -Wclippy::needless << 
459                             -Wclippy::no_mangl << 
460                             -Wclippy::dbg_macr << 
461                                                << 
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS << 
463                        $(HOSTCFLAGS) -I $(srct << 
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 
465                        -I $(srctree)/scripts/i << 
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 
467                         -Zallow-features= $(HO << 
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H << 
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST << 
470                                                   347 
471 # Make variables (CC, etc...)                     348 # Make variables (CC, etc...)
472 CPP             = $(CC) -E                     !! 349 AS              = $(CROSS_COMPILE)as
473 ifneq ($(LLVM),)                               << 
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU << 
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S << 
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_ << 
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_ << 
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$( << 
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$( << 
480 READELF         = $(LLVM_PREFIX)llvm-readelf$( << 
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL << 
482 else                                           << 
483 CC              = $(CROSS_COMPILE)gcc          << 
484 LD              = $(CROSS_COMPILE)ld              350 LD              = $(CROSS_COMPILE)ld
                                                   >> 351 CC              = $(CROSS_COMPILE)gcc
                                                   >> 352 CPP             = $(CC) -E
485 AR              = $(CROSS_COMPILE)ar              353 AR              = $(CROSS_COMPILE)ar
486 NM              = $(CROSS_COMPILE)nm              354 NM              = $(CROSS_COMPILE)nm
                                                   >> 355 STRIP           = $(CROSS_COMPILE)strip
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         356 OBJCOPY         = $(CROSS_COMPILE)objcopy
488 OBJDUMP         = $(CROSS_COMPILE)objdump         357 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                             358 AWK             = awk
                                                   >> 359 GENKSYMS        = scripts/genksyms/genksyms
502 INSTALLKERNEL  := installkernel                   360 INSTALLKERNEL  := installkernel
                                                   >> 361 DEPMOD          = /sbin/depmod
503 PERL            = perl                            362 PERL            = perl
504 PYTHON3         = python3                      !! 363 PYTHON          = python
505 CHECK           = sparse                          364 CHECK           = sparse
506 BASH            = bash                         << 
507 KGZIP           = gzip                         << 
508 KBZIP2          = bzip2                        << 
509 KLZOP           = lzop                         << 
510 LZMA            = lzma                         << 
511 LZ4             = lz4c                         << 
512 XZ              = xz                           << 
513 ZSTD            = zstd                         << 
514                                                   365 
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    366 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516                   -Wbitwise -Wno-return-void - !! 367                   -Wbitwise -Wno-return-void $(CF)
517 NOSTDINC_FLAGS :=                              !! 368 NOSTDINC_FLAGS  =
518 CFLAGS_MODULE   =                                 369 CFLAGS_MODULE   =
519 RUSTFLAGS_MODULE =                             << 
520 AFLAGS_MODULE   =                                 370 AFLAGS_MODULE   =
521 LDFLAGS_MODULE  =                                 371 LDFLAGS_MODULE  =
522 CFLAGS_KERNEL   =                                 372 CFLAGS_KERNEL   =
523 RUSTFLAGS_KERNEL =                             << 
524 AFLAGS_KERNEL   =                                 373 AFLAGS_KERNEL   =
525 LDFLAGS_vmlinux =                                 374 LDFLAGS_vmlinux =
                                                   >> 375 CFLAGS_GCOV     := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
                                                   >> 376 CFLAGS_KCOV     := $(call cc-option,-fsanitize-coverage=trace-pc,)
                                                   >> 377 
526                                                   378 
527 # Use USERINCLUDE when you must reference the     379 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE    := \                               380 USERINCLUDE    := \
529                 -I$(srctree)/arch/$(SRCARCH)/i !! 381                 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
530                 -I$(objtree)/arch/$(SRCARCH)/i !! 382                 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
531                 -I$(srctree)/include/uapi \       383                 -I$(srctree)/include/uapi \
532                 -I$(objtree)/include/generated    384                 -I$(objtree)/include/generated/uapi \
533                 -include $(srctree)/include/li << 
534                 -include $(srctree)/include/li    385                 -include $(srctree)/include/linux/kconfig.h
535                                                   386 
536 # Use LINUXINCLUDE when you must reference the    387 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option      388 # Needed to be compatible with the O= option
538 LINUXINCLUDE    := \                              389 LINUXINCLUDE    := \
539                 -I$(srctree)/arch/$(SRCARCH)/i !! 390                 -I$(srctree)/arch/$(hdr-arch)/include \
540                 -I$(objtree)/arch/$(SRCARCH)/i !! 391                 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
541                 $(if $(building_out_of_srctree !! 392                 -I$(objtree)/arch/$(hdr-arch)/include/generated \
542                 -I$(objtree)/include \         !! 393                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
543                 $(USERINCLUDE)                 !! 394                 -I$(objtree)/include
544                                                !! 395 
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE     !! 396 LINUXINCLUDE    += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))
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                                                   397 
555 KBUILD_CPPFLAGS := -D__KERNEL__                   398 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \     !! 399 
557                     -Cpanic=abort -Cembed-bitc !! 400 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
558                     -Cforce-unwind-tables=n -C !! 401                    -fno-strict-aliasing -fno-common \
559                     -Csymbol-mangling-version= !! 402                    -Werror-implicit-function-declaration \
560                     -Crelocation-model=static  !! 403                    -Wno-format-security \
561                     -Zfunction-sections=n \    !! 404                    -std=gnu89 $(call cc-option,-fno-PIE)
562                     -Wclippy::float_arithmetic !! 405 
563                                                   406 
564 KBUILD_AFLAGS_KERNEL :=                           407 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL :=                           408 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL :=                     !! 409 KBUILD_AFLAGS   := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
567 KBUILD_AFLAGS_MODULE  := -DMODULE                 410 KBUILD_AFLAGS_MODULE  := -DMODULE
568 KBUILD_CFLAGS_MODULE  := -DMODULE                 411 KBUILD_CFLAGS_MODULE  := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE        !! 412 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
570 KBUILD_LDFLAGS_MODULE :=                       << 
571 KBUILD_LDFLAGS :=                              << 
572 CLANG_FLAGS :=                                 << 
573                                                << 
574 ifeq ($(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                                                   413 
582 # Allows the usage of unstable features in sta !! 414 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
583 export RUSTC_BOOTSTRAP := 1                    !! 415 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
                                                   >> 416 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
584                                                   417 
585 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K !! 418 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
586 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q !! 419 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
587 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS          !! 420 export CPP AR NM STRIP OBJCOPY OBJDUMP
588 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF !! 421 export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
589 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ !! 422 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
590 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD     !! 423 
591 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS  !! 424 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
592 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS    !! 425 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
593                                                << 
594 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC << 
595 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU << 
596 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF << 
597 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    426 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
598 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 427 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
599 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 428 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
                                                   >> 429 export KBUILD_ARFLAGS
                                                   >> 430 
                                                   >> 431 # When compiling out-of-tree modules, put MODVERDIR in the module
                                                   >> 432 # tree rather than in the kernel tree. The kernel tree might
                                                   >> 433 # even be read-only.
                                                   >> 434 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
600                                                   435 
601 # Files to ignore in find ... statements          436 # Files to ignore in find ... statements
602                                                   437 
603 export RCS_FIND_IGNORE := \( -name SCCS -o -na    438 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
604                           -name CVS -o -name .    439                           -name CVS -o -name .pc -o -name .hg -o -name .git \) \
605                           -prune -o               440                           -prune -o
                                                   >> 441 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
                                                   >> 442                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
606                                                   443 
607 # ============================================    444 # ===========================================================================
608 # Rules shared between *config targets and bui    445 # Rules shared between *config targets and build targets
609                                                   446 
610 # Basic helpers built in scripts/basic/        !! 447 # Basic helpers built in scripts/
611 PHONY += scripts_basic                            448 PHONY += scripts_basic
612 scripts_basic:                                    449 scripts_basic:
613         $(Q)$(MAKE) $(build)=scripts/basic        450         $(Q)$(MAKE) $(build)=scripts/basic
                                                   >> 451         $(Q)rm -f .tmp_quiet_recordmcount
                                                   >> 452 
                                                   >> 453 # To avoid any implicit rule to kick in, define an empty command.
                                                   >> 454 scripts/basic/%: scripts_basic ;
614                                                   455 
615 PHONY += outputmakefile                           456 PHONY += outputmakefile
616 ifdef building_out_of_srctree                  << 
617 # Before starting out-of-tree build, make sure << 
618 # outputmakefile generates a Makefile in the o    457 # outputmakefile generates a Makefile in the output directory, if using a
619 # separate output directory. This allows conve    458 # separate output directory. This allows convenient use of make in the
620 # output directory.                               459 # output directory.
621 # At the same time when output Makefile genera << 
622 # ignore whole output directory                << 
623                                                << 
624 quiet_cmd_makefile = GEN     Makefile          << 
625       cmd_makefile = { \                       << 
626         echo "\# Automatically generated by $( << 
627         echo "include $(srctree)/Makefile"; \  << 
628         } > Makefile                           << 
629                                                << 
630 outputmakefile:                                   460 outputmakefile:
631         @if [ -f $(srctree)/.config -o \       !! 461 ifneq ($(KBUILD_SRC),)
632                  -d $(srctree)/include/config  << 
633                  -d $(srctree)/arch/$(SRCARCH) << 
634                 echo >&2 "***"; \              << 
635                 echo >&2 "*** The source tree  << 
636                 echo >&2 "*** in $(abs_srctree << 
637                 echo >&2 "***"; \              << 
638                 false; \                       << 
639         fi                                     << 
640         $(Q)ln -fsn $(srctree) source             462         $(Q)ln -fsn $(srctree) source
641         $(call cmd,makefile)                   !! 463         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
642         $(Q)test -e .gitignore || \            !! 464             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
643         { echo "# this is build directory, ign << 
644 endif                                             465 endif
645                                                   466 
646 # The expansion should be delayed until arch/$ !! 467 # Support for using generic headers in asm-generic
647 # Some architectures define CROSS_COMPILE in a !! 468 PHONY += asm-generic
648 # CC_VERSION_TEXT and RUSTC_VERSION_TEXT are r !! 469 asm-generic:
649 # need export), and from include/config/auto.c !! 470         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
650 # upgrade.                                     !! 471                     src=asm obj=arch/$(SRCARCH)/include/generated/asm
651 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 472         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
652 RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell !! 473                     src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
                                                   >> 474 
                                                   >> 475 # To make sure we do not include .config for any of the *config targets
                                                   >> 476 # catch them early, and hand them over to scripts/kconfig/Makefile
                                                   >> 477 # It is allowed to specify more targets when calling make, including
                                                   >> 478 # mixing *config targets and build targets.
                                                   >> 479 # For example 'make oldconfig all'.
                                                   >> 480 # Detect when mixed targets is specified, and make a second invocation
                                                   >> 481 # of make so .config is not included in this case either (for *config).
                                                   >> 482 
                                                   >> 483 version_h := include/generated/uapi/linux/version.h
                                                   >> 484 old_version_h := include/linux/version.h
                                                   >> 485 
                                                   >> 486 no-dot-config-targets := clean mrproper distclean \
                                                   >> 487                          cscope gtags TAGS tags help% %docs check% coccicheck \
                                                   >> 488                          $(version_h) headers_% archheaders archscripts \
                                                   >> 489                          kernelversion %src-pkg
                                                   >> 490 
                                                   >> 491 config-targets := 0
                                                   >> 492 mixed-targets  := 0
                                                   >> 493 dot-config     := 1
653                                                   494 
654 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), !! 495 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
655 include $(srctree)/scripts/Makefile.clang      !! 496         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
                                                   >> 497                 dot-config := 0
                                                   >> 498         endif
656 endif                                             499 endif
657                                                   500 
658 # Include this also for config targets because !! 501 ifeq ($(KBUILD_EXTMOD),)
659 # cc-cross-prefix to determine CROSS_COMPILE.  !! 502         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
660 ifdef need-compiler                            !! 503                 config-targets := 1
661 include $(srctree)/scripts/Makefile.compiler   !! 504                 ifneq ($(words $(MAKECMDGOALS)),1)
                                                   >> 505                         mixed-targets := 1
                                                   >> 506                 endif
                                                   >> 507         endif
                                                   >> 508 endif
                                                   >> 509 # install and module_install need also be processed one by one
                                                   >> 510 ifneq ($(filter install,$(MAKECMDGOALS)),)
                                                   >> 511         ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
                                                   >> 512                 mixed-targets := 1
                                                   >> 513         endif
662 endif                                             514 endif
663                                                   515 
664 ifdef config-build                             !! 516 ifeq ($(mixed-targets),1)
                                                   >> 517 # ===========================================================================
                                                   >> 518 # We're called with mixed targets (*config and build targets).
                                                   >> 519 # Handle them one by one.
                                                   >> 520 
                                                   >> 521 PHONY += $(MAKECMDGOALS) __build_one_by_one
                                                   >> 522 
                                                   >> 523 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
                                                   >> 524         @:
                                                   >> 525 
                                                   >> 526 __build_one_by_one:
                                                   >> 527         $(Q)set -e; \
                                                   >> 528         for i in $(MAKECMDGOALS); do \
                                                   >> 529                 $(MAKE) -f $(srctree)/Makefile $$i; \
                                                   >> 530         done
                                                   >> 531 
                                                   >> 532 else
                                                   >> 533 ifeq ($(config-targets),1)
665 # ============================================    534 # ===========================================================================
666 # *config targets only - make sure prerequisit    535 # *config targets only - make sure prerequisites are updated, and descend
667 # in scripts/kconfig to make the *config targe    536 # in scripts/kconfig to make the *config target
668                                                   537 
669 # Read arch-specific Makefile to set KBUILD_DE !! 538 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
670 # KBUILD_DEFCONFIG may point out an alternativ    539 # KBUILD_DEFCONFIG may point out an alternative default configuration
671 # used for 'make defconfig'                       540 # used for 'make defconfig'
672 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 541 include arch/$(SRCARCH)/Makefile
673 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 542 export KBUILD_DEFCONFIG KBUILD_KCONFIG
674                                                   543 
675 config: outputmakefile scripts_basic FORCE     !! 544 config: scripts_basic outputmakefile FORCE
676         $(Q)$(MAKE) $(build)=scripts/kconfig $    545         $(Q)$(MAKE) $(build)=scripts/kconfig $@
677                                                   546 
678 %config: outputmakefile scripts_basic FORCE    !! 547 %config: scripts_basic outputmakefile FORCE
679         $(Q)$(MAKE) $(build)=scripts/kconfig $    548         $(Q)$(MAKE) $(build)=scripts/kconfig $@
680                                                   549 
681 else #!config-build                            !! 550 else
682 # ============================================    551 # ===========================================================================
683 # Build targets only - this includes vmlinux,  !! 552 # Build targets only - this includes vmlinux, arch specific targets, clean
684 # targets and others. In general all targets e    553 # targets and others. In general all targets except *config targets.
685                                                   554 
686 # If building an external module we do not car << 
687 # but instead __all depend on modules          << 
688 PHONY += all                                   << 
689 ifeq ($(KBUILD_EXTMOD),)                          555 ifeq ($(KBUILD_EXTMOD),)
690 __all: all                                     !! 556 # Additional helpers built in scripts/
691 else                                           !! 557 # Carefully list dependencies so we do not try to build scripts twice
692 __all: modules                                 !! 558 # in parallel
693 endif                                          !! 559 PHONY += scripts
                                                   >> 560 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
                                                   >> 561          asm-generic gcc-plugins
                                                   >> 562         $(Q)$(MAKE) $(build)=$(@)
694                                                   563 
695 targets :=                                     !! 564 # Objects we will link into vmlinux / subdirs we need to visit
                                                   >> 565 init-y          := init/
                                                   >> 566 drivers-y       := drivers/ sound/ firmware/
                                                   >> 567 net-y           := net/
                                                   >> 568 libs-y          := lib/
                                                   >> 569 core-y          := usr/
                                                   >> 570 virt-y          := virt/
                                                   >> 571 endif # KBUILD_EXTMOD
696                                                   572 
697 # Decide whether to build built-in, modular, o !! 573 ifeq ($(dot-config),1)
698 # Normally, just do built-in.                  !! 574 # Read in config
                                                   >> 575 -include include/config/auto.conf
699                                                   576 
700 KBUILD_MODULES :=                              !! 577 ifeq ($(KBUILD_EXTMOD),)
701 KBUILD_BUILTIN := 1                            !! 578 # Read in dependencies to all Kconfig* files, make sure to run
                                                   >> 579 # oldconfig if changes are detected.
                                                   >> 580 -include include/config/auto.conf.cmd
                                                   >> 581 
                                                   >> 582 # To avoid any implicit rule to kick in, define an empty command
                                                   >> 583 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
                                                   >> 584 
                                                   >> 585 # If .config is newer than include/config/auto.conf, someone tinkered
                                                   >> 586 # with it and forgot to run make oldconfig.
                                                   >> 587 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
                                                   >> 588 # we execute the config step to be sure to catch updated Kconfig files
                                                   >> 589 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
                                                   >> 590         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
                                                   >> 591 else
                                                   >> 592 # external modules needs include/generated/autoconf.h and include/config/auto.conf
                                                   >> 593 # but do not care if they are up-to-date. Use auto.conf to trigger the test
                                                   >> 594 PHONY += include/config/auto.conf
702                                                   595 
703 # If we have only "make modules", don't compil !! 596 include/config/auto.conf:
704 ifeq ($(MAKECMDGOALS),modules)                 !! 597         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
705   KBUILD_BUILTIN :=                            !! 598         echo >&2;                                                       \
706 endif                                          !! 599         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
                                                   >> 600         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
                                                   >> 601         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
                                                   >> 602         echo >&2 ;                                                      \
                                                   >> 603         /bin/false)
707                                                   604 
708 # If we have "make <whatever> modules", compil !! 605 endif # KBUILD_EXTMOD
709 # in addition to whatever we do anyway.        << 
710 # Just "make" or "make all" shall build module << 
711                                                   606 
712 ifneq ($(filter all modules nsdeps %compile_co !! 607 else
713   KBUILD_MODULES := 1                          !! 608 # Dummy target needed, because used as prerequisite
714 endif                                          !! 609 include/config/auto.conf: ;
                                                   >> 610 endif # $(dot-config)
715                                                   611 
716 ifeq ($(MAKECMDGOALS),)                        !! 612 # For the kernel to actually contain only the needed exported symbols,
                                                   >> 613 # we have to build modules as well to determine what those symbols are.
                                                   >> 614 # (this can be evaluated only once include/config/auto.conf has been included)
                                                   >> 615 ifdef CONFIG_TRIM_UNUSED_KSYMS
717   KBUILD_MODULES := 1                             616   KBUILD_MODULES := 1
718 endif                                             617 endif
719                                                   618 
720 export KBUILD_MODULES KBUILD_BUILTIN           << 
721                                                << 
722 ifdef need-config                              << 
723 include include/config/auto.conf               << 
724 endif                                          << 
725                                                << 
726 ifeq ($(KBUILD_EXTMOD),)                       << 
727 # Objects we will link into vmlinux / subdirs  << 
728 core-y          :=                             << 
729 drivers-y       :=                             << 
730 libs-y          := lib/                        << 
731 endif # KBUILD_EXTMOD                          << 
732                                                << 
733 # The all: target is the default when no targe    619 # The all: target is the default when no target is given on the
734 # command line.                                   620 # command line.
735 # This allow a user to issue only 'make' to bu    621 # This allow a user to issue only 'make' to build a kernel including modules
736 # Defaults to vmlinux, but the arch makefile u    622 # Defaults to vmlinux, but the arch makefile usually adds further targets
737 all: vmlinux                                      623 all: vmlinux
738                                                   624 
739 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover !! 625 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
740 ifdef CONFIG_CC_IS_GCC                         !! 626 # values of the respective KBUILD_* variables
741 CFLAGS_GCOV     += -fno-tree-loop-im           !! 627 ARCH_CPPFLAGS :=
742 endif                                          !! 628 ARCH_AFLAGS :=
743 export CFLAGS_GCOV                             !! 629 ARCH_CFLAGS :=
744                                                !! 630 include arch/$(SRCARCH)/Makefile
745 # The arch Makefiles can override CC_FLAGS_FTR << 
746 ifdef CONFIG_FUNCTION_TRACER                   << 
747   CC_FLAGS_FTRACE := -pg                       << 
748 endif                                          << 
749                                                << 
750 include $(srctree)/arch/$(SRCARCH)/Makefile    << 
751                                                << 
752 ifdef need-config                              << 
753 ifdef may-sync-config                          << 
754 # Read in dependencies to all Kconfig* files,  << 
755 # changes are detected. This should be include << 
756 # because some architectures define CROSS_COMP << 
757 include include/config/auto.conf.cmd           << 
758                                                << 
759 $(KCONFIG_CONFIG):                             << 
760         @echo >&2 '***'                        << 
761         @echo >&2 '*** Configuration file "$@" << 
762         @echo >&2 '***'                        << 
763         @echo >&2 '*** Please run some configu << 
764         @echo >&2 '*** "make menuconfig" or "m << 
765         @echo >&2 '***'                        << 
766         @/bin/false                            << 
767                                                << 
768 # The actual configuration files used during t << 
769 # include/generated/ and include/config/. Upda << 
770 # include/config/auto.conf (which mirrors .con << 
771 #                                              << 
772 # This exploits the 'multi-target pattern rule << 
773 # The syncconfig should be executed only once  << 
774 # (Note: use the grouped target '&:' when we b << 
775 #                                              << 
776 # Do not use $(call cmd,...) here. That would  << 
777 # so you cannot notice that Kconfig is waiting << 
778 %/config/auto.conf %/config/auto.conf.cmd %/ge << 
779         $(Q)$(kecho) "  SYNC    $@"            << 
780         $(Q)$(MAKE) -f $(srctree)/Makefile syn << 
781 else # !may-sync-config                        << 
782 # External modules and some install targets ne << 
783 # and include/config/auto.conf but do not care << 
784 # Use auto.conf to trigger the test            << 
785 PHONY += include/config/auto.conf              << 
786                                                   631 
787 include/config/auto.conf:                      !! 632 KBUILD_CFLAGS   += $(call cc-option,-fno-delete-null-pointer-checks,)
788         @test -e include/generated/autoconf.h  !! 633 KBUILD_CFLAGS   += $(call cc-disable-warning,frame-address,)
789         echo >&2;                              << 
790         echo >&2 "  ERROR: Kernel configuratio << 
791         echo >&2 "         include/generated/a << 
792         echo >&2 "         Run 'make oldconfig << 
793         echo >&2 ;                             << 
794         /bin/false)                            << 
795                                                   634 
796 endif # may-sync-config                        !! 635 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
797 endif # need-config                            !! 636 KBUILD_CFLAGS   += $(call cc-option,-ffunction-sections,)
                                                   >> 637 KBUILD_CFLAGS   += $(call cc-option,-fdata-sections,)
                                                   >> 638 endif
798                                                   639 
799 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch !! 640 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
                                                   >> 641 KBUILD_CFLAGS   += -Os $(call cc-disable-warning,maybe-uninitialized,)
                                                   >> 642 else
                                                   >> 643 ifdef CONFIG_PROFILE_ALL_BRANCHES
                                                   >> 644 KBUILD_CFLAGS   += -O2 $(call cc-disable-warning,maybe-uninitialized,)
                                                   >> 645 else
                                                   >> 646 KBUILD_CFLAGS   += -O2
                                                   >> 647 endif
                                                   >> 648 endif
800                                                   649 
801 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE       !! 650 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
802 KBUILD_CFLAGS += -O2                           !! 651                         $(call cc-disable-warning,maybe-uninitialized,))
803 KBUILD_RUSTFLAGS += -Copt-level=2              << 
804 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE         << 
805 KBUILD_CFLAGS += -Os                           << 
806 KBUILD_RUSTFLAGS += -Copt-level=s              << 
807 endif                                          << 
808                                                << 
809 # Always set `debug-assertions` and `overflow- << 
810 # depends on `opt-level` and `debug-assertions << 
811 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( << 
812 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 
813                                                   652 
814 # Tell gcc to never replace conditional load w    653 # Tell gcc to never replace conditional load with a non-conditional one
815 ifdef CONFIG_CC_IS_GCC                         << 
816 # gcc-10 renamed --param=allow-store-data-race << 
817 # -fno-allow-store-data-races.                 << 
818 KBUILD_CFLAGS   += $(call cc-option,--param=al    654 KBUILD_CFLAGS   += $(call cc-option,--param=allow-store-data-races=0)
819 KBUILD_CFLAGS   += $(call cc-option,-fno-allow !! 655 
                                                   >> 656 # check for 'asm goto'
                                                   >> 657 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
                                                   >> 658         KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
                                                   >> 659         KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
820 endif                                             660 endif
821                                                   661 
                                                   >> 662 include scripts/Makefile.gcc-plugins
                                                   >> 663 
822 ifdef CONFIG_READABLE_ASM                         664 ifdef CONFIG_READABLE_ASM
823 # Disable optimizations that make assembler li    665 # Disable optimizations that make assembler listings hard to read.
824 # reorder blocks reorders the control in the f    666 # reorder blocks reorders the control in the function
825 # ipa clone creates specialized cloned functio    667 # ipa clone creates specialized cloned functions
826 # partial inlining inlines only parts of funct    668 # partial inlining inlines only parts of functions
827 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 669 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
                                                   >> 670                  $(call cc-option,-fno-ipa-cp-clone,) \
                                                   >> 671                  $(call cc-option,-fno-partial-inlining)
828 endif                                             672 endif
829                                                   673 
830 stackp-flags-y                                 !! 674 ifneq ($(CONFIG_FRAME_WARN),0)
831 stackp-flags-$(CONFIG_STACKPROTECTOR)          !! 675 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
832 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)   !! 676 endif
833                                                   677 
834 KBUILD_CFLAGS += $(stackp-flags-y)             !! 678 # This selects the stack protector compiler flag. Testing it is delayed
                                                   >> 679 # until after .config has been reprocessed, in the prepare-compiler-check
                                                   >> 680 # target.
                                                   >> 681 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
                                                   >> 682   stackp-flag := -fstack-protector
                                                   >> 683   stackp-name := REGULAR
                                                   >> 684 else
                                                   >> 685 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
                                                   >> 686   stackp-flag := -fstack-protector-strong
                                                   >> 687   stackp-name := STRONG
                                                   >> 688 else
                                                   >> 689   # Force off for distro compilers that enable stack protector by default.
                                                   >> 690   stackp-flag := $(call cc-option, -fno-stack-protector)
                                                   >> 691 endif
                                                   >> 692 endif
                                                   >> 693 # Find arch-specific stack protector compiler sanity-checking script.
                                                   >> 694 ifdef CONFIG_CC_STACKPROTECTOR
                                                   >> 695   stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
                                                   >> 696   stackp-check := $(wildcard $(stackp-path))
                                                   >> 697 endif
                                                   >> 698 KBUILD_CFLAGS += $(stackp-flag)
                                                   >> 699 
                                                   >> 700 ifeq ($(cc-name),clang)
                                                   >> 701 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
                                                   >> 702 KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
                                                   >> 703 KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
                                                   >> 704 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
                                                   >> 705 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
                                                   >> 706 # Quiet clang warning: comparison of unsigned expression < 0 is always false
                                                   >> 707 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
                                                   >> 708 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
                                                   >> 709 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
                                                   >> 710 # See modpost pattern 2
                                                   >> 711 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
                                                   >> 712 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
                                                   >> 713 else
835                                                   714 
836 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 715 # These warnings generated too much noise in a regular build.
837 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)      !! 716 # Use make W=1 to enable them (see scripts/Makefile.build)
                                                   >> 717 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
                                                   >> 718 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
                                                   >> 719 endif
838                                                   720 
839 ifdef CONFIG_FRAME_POINTER                        721 ifdef CONFIG_FRAME_POINTER
840 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    722 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
841 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y   << 
842 else                                              723 else
843 # Some targets (ARM with Thumb2, for example),    724 # Some targets (ARM with Thumb2, for example), can't be built with frame
844 # pointers.  For those, we don't have FUNCTION    725 # pointers.  For those, we don't have FUNCTION_TRACER automatically
845 # select FRAME_POINTER.  However, FUNCTION_TRA    726 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
846 # incompatible with -fomit-frame-pointer with     727 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
847 # -fomit-frame-pointer with FUNCTION_TRACER.      728 # -fomit-frame-pointer with FUNCTION_TRACER.
848 # In the Rust target specification, "frame-poi << 
849 # to "may-omit".                               << 
850 ifndef CONFIG_FUNCTION_TRACER                     729 ifndef CONFIG_FUNCTION_TRACER
851 KBUILD_CFLAGS   += -fomit-frame-pointer           730 KBUILD_CFLAGS   += -fomit-frame-pointer
852 endif                                             731 endif
853 endif                                             732 endif
854                                                   733 
855 # Initialize all stack variables with a 0xAA p !! 734 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
856 ifdef CONFIG_INIT_STACK_ALL_PATTERN            << 
857 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat << 
858 endif                                          << 
859                                                   735 
860 # Initialize all stack variables with a zero v !! 736 ifdef CONFIG_DEBUG_INFO
861 ifdef CONFIG_INIT_STACK_ALL_ZERO               !! 737 ifdef CONFIG_DEBUG_INFO_SPLIT
862 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer !! 738 KBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
863 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 739 else
864 # https://github.com/llvm/llvm-project/issues/ !! 740 KBUILD_CFLAGS   += -g
865 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi << 
866 export CC_AUTO_VAR_INIT_ZERO_ENABLER           << 
867 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA << 
868 endif                                             741 endif
                                                   >> 742 KBUILD_AFLAGS   += -Wa,-gdwarf-2
                                                   >> 743 endif
                                                   >> 744 ifdef CONFIG_DEBUG_INFO_DWARF4
                                                   >> 745 KBUILD_CFLAGS   += $(call cc-option, -gdwarf-4,)
869 endif                                             746 endif
870                                                   747 
871 # While VLAs have been removed, GCC produces u !! 748 ifdef CONFIG_DEBUG_INFO_REDUCED
872 # for the randomize_kstack_offset feature. Dis !! 749 KBUILD_CFLAGS   += $(call cc-option, -femit-struct-debug-baseonly) \
873 KBUILD_CFLAGS   += $(call cc-option, -fno-stac !! 750                    $(call cc-option,-fno-var-tracking)
874                                                << 
875 # Clear used registers at func exit (to reduce << 
876 ifdef CONFIG_ZERO_CALL_USED_REGS               << 
877 KBUILD_CFLAGS   += -fzero-call-used-regs=used- << 
878 endif                                             751 endif
879                                                   752 
880 ifdef CONFIG_FUNCTION_TRACER                      753 ifdef CONFIG_FUNCTION_TRACER
881 ifdef CONFIG_FTRACE_MCOUNT_USE_CC              !! 754 ifndef CC_FLAGS_FTRACE
882   CC_FLAGS_FTRACE       += -mrecord-mcount     !! 755 CC_FLAGS_FTRACE := -pg
883   ifdef CONFIG_HAVE_NOP_MCOUNT                 << 
884     ifeq ($(call cc-option-yn, -mnop-mcount),y << 
885       CC_FLAGS_FTRACE   += -mnop-mcount        << 
886       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU << 
887     endif                                      << 
888   endif                                        << 
889 endif                                          << 
890 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL         << 
891   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT         << 
892     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU << 
893   endif                                        << 
894 endif                                          << 
895 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT    << 
896   ifdef CONFIG_HAVE_C_RECORDMCOUNT             << 
897     BUILD_C_RECORDMCOUNT := y                  << 
898     export BUILD_C_RECORDMCOUNT                << 
899   endif                                        << 
900 endif                                             756 endif
                                                   >> 757 export CC_FLAGS_FTRACE
901 ifdef CONFIG_HAVE_FENTRY                          758 ifdef CONFIG_HAVE_FENTRY
902   # s390-linux-gnu-gcc did not support -mfentr !! 759 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
903   ifeq ($(call cc-option-yn, -mfentry),y)      !! 760 endif
904     CC_FLAGS_FTRACE     += -mfentry            !! 761 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
905     CC_FLAGS_USING      += -DCC_USING_FENTRY   !! 762 KBUILD_AFLAGS   += $(CC_USING_FENTRY)
906   endif                                        !! 763 ifdef CONFIG_DYNAMIC_FTRACE
                                                   >> 764         ifdef CONFIG_HAVE_C_RECORDMCOUNT
                                                   >> 765                 BUILD_C_RECORDMCOUNT := y
                                                   >> 766                 export BUILD_C_RECORDMCOUNT
                                                   >> 767         endif
907 endif                                             768 endif
908 export CC_FLAGS_FTRACE                         << 
909 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA << 
910 KBUILD_AFLAGS   += $(CC_FLAGS_USING)           << 
911 endif                                             769 endif
912                                                   770 
913 # We trigger additional mismatches with less i    771 # We trigger additional mismatches with less inlining
914 ifdef CONFIG_DEBUG_SECTION_MISMATCH               772 ifdef CONFIG_DEBUG_SECTION_MISMATCH
915 KBUILD_CFLAGS += -fno-inline-functions-called- !! 773 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
916 endif                                          << 
917                                                << 
918 # `rustc`'s `-Zfunction-sections` applies to d << 
919 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION     << 
920 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f << 
921 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections << 
922 LDFLAGS_vmlinux += --gc-sections               << 
923 endif                                          << 
924                                                << 
925 ifdef CONFIG_SHADOW_CALL_STACK                 << 
926 ifndef CONFIG_DYNAMIC_SCS                      << 
927 CC_FLAGS_SCS    := -fsanitize=shadow-call-stac << 
928 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)             << 
929 KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-st << 
930 endif                                          << 
931 export CC_FLAGS_SCS                            << 
932 endif                                          << 
933                                                << 
934 ifdef CONFIG_LTO_CLANG                         << 
935 ifdef CONFIG_LTO_CLANG_THIN                    << 
936 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit << 
937 else                                           << 
938 CC_FLAGS_LTO    := -flto                       << 
939 endif                                          << 
940 CC_FLAGS_LTO    += -fvisibility=hidden         << 
941                                                << 
942 # Limit inlining across translation units to r << 
943 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 << 
944 endif                                          << 
945                                                << 
946 ifdef CONFIG_LTO                               << 
947 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)    << 
948 KBUILD_AFLAGS   += -fno-lto                    << 
949 export CC_FLAGS_LTO                            << 
950 endif                                          << 
951                                                << 
952 ifdef CONFIG_CFI_CLANG                         << 
953 CC_FLAGS_CFI    := -fsanitize=kcfi             << 
954 ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS      << 
955         CC_FLAGS_CFI    += -fsanitize-cfi-ical << 
956 endif                                          << 
957 ifdef CONFIG_RUST                              << 
958         # Always pass -Zsanitizer-cfi-normaliz << 
959         # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. << 
960         RUSTC_FLAGS_CFI   := -Zsanitizer=kcfi  << 
961         KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) << 
962         export RUSTC_FLAGS_CFI                 << 
963 endif                                          << 
964 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)             << 
965 export CC_FLAGS_CFI                            << 
966 endif                                          << 
967                                                << 
968 # Architectures can define flags to add/remove << 
969 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UN << 
970 export CC_FLAGS_FPU                            << 
971 export CC_FLAGS_NO_FPU                         << 
972                                                << 
973 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)         << 
974 # Set the minimal function alignment. Use the  << 
975 # -fmin-function-alignment if it is available, << 
976 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME << 
977 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT     << 
978 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 
979 else                                           << 
980 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 
981 endif                                          << 
982 endif                                             774 endif
983                                                   775 
984 # arch Makefile may override CC so keep this a    776 # arch Makefile may override CC so keep this after arch Makefile is included
985 NOSTDINC_FLAGS += -nostdinc                    !! 777 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
                                                   >> 778 CHECKFLAGS     += $(NOSTDINC_FLAGS)
986                                                   779 
987 # To gain proper coverage for CONFIG_UBSAN_BOU !! 780 # warn about C99 declaration after statement
988 # the kernel uses only C99 flexible arrays for !! 781 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
989 # arrays. Enforce this for everything that may << 
990 # perform bounds checking.                     << 
991 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl << 
992                                                << 
993 #Currently, disable -Wstringop-overflow for GC << 
994 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW << 
995 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + << 
996                                                   782 
997 # disable invalid "can't wrap" optimizations f !! 783 # disable pointer signed / unsigned warnings in gcc 4.0
998 KBUILD_CFLAGS   += -fno-strict-overflow        !! 784 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
999                                                   785 
1000 # Make sure -fstack-check isn't enabled (like !! 786 # disable invalid "can't wrap" optimizations for signed / pointers
1001 KBUILD_CFLAGS  += -fno-stack-check            !! 787 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
1002                                                  788 
1003 # conserve stack if available                    789 # conserve stack if available
1004 ifdef CONFIG_CC_IS_GCC                        !! 790 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
1005 KBUILD_CFLAGS   += -fconserve-stack           << 
1006 endif                                         << 
1007                                                  791 
1008 # change __FILE__ to the relative path from t !! 792 # disallow errors like 'EXPORT_GPL(foo);' with missing header
1009 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 793 KBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
1010                                                  794 
1011 # include additional Makefiles when needed    !! 795 # require functions to have arguments in prototypes, not empty 'int foo()'
1012 include-y                       := scripts/Ma !! 796 KBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
1013 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma << 
1014 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma << 
1015 include-$(CONFIG_KASAN)         += scripts/Ma << 
1016 include-$(CONFIG_KCSAN)         += scripts/Ma << 
1017 include-$(CONFIG_KMSAN)         += scripts/Ma << 
1018 include-$(CONFIG_UBSAN)         += scripts/Ma << 
1019 include-$(CONFIG_KCOV)          += scripts/Ma << 
1020 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma << 
1021 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma << 
1022                                               << 
1023 include $(addprefix $(srctree)/, $(include-y) << 
1024                                               << 
1025 # scripts/Makefile.gcc-plugins is intentional << 
1026 # Do not add $(call cc-option,...) below this << 
1027 # from the clean source tree, the GCC plugins << 
1028                                               << 
1029 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS  << 
1030 KBUILD_CPPFLAGS += $(KCPPFLAGS)               << 
1031 KBUILD_AFLAGS   += $(KAFLAGS)                 << 
1032 KBUILD_CFLAGS   += $(KCFLAGS)                 << 
1033 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)             << 
1034                                               << 
1035 KBUILD_LDFLAGS_MODULE += --build-id=sha1      << 
1036 LDFLAGS_vmlinux += --build-id=sha1            << 
1037                                               << 
1038 KBUILD_LDFLAGS  += -z noexecstack             << 
1039 ifeq ($(CONFIG_LD_IS_BFD),y)                  << 
1040 KBUILD_LDFLAGS  += $(call ld-option,--no-warn << 
1041 endif                                         << 
1042                                                  797 
1043 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)             !! 798 # Prohibit date/time macros, which would make the build non-deterministic
1044 LDFLAGS_vmlinux += -X                         !! 799 KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
1045 endif                                         !! 800 
                                                   >> 801 # enforce correct pointer usage
                                                   >> 802 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
                                                   >> 803 
                                                   >> 804 # use the deterministic mode of AR if available
                                                   >> 805 KBUILD_ARFLAGS := $(call ar-option,D)
                                                   >> 806 
                                                   >> 807 include scripts/Makefile.kasan
                                                   >> 808 include scripts/Makefile.extrawarn
                                                   >> 809 include scripts/Makefile.ubsan
                                                   >> 810 
                                                   >> 811 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
                                                   >> 812 # last assignments
                                                   >> 813 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
                                                   >> 814 KBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
                                                   >> 815 KBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
                                                   >> 816 
                                                   >> 817 # Use --build-id when available.
                                                   >> 818 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
                                                   >> 819                               $(call cc-ldoption, -Wl$(comma)--build-id,))
                                                   >> 820 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
                                                   >> 821 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
1046                                                  822 
1047 ifeq ($(CONFIG_RELR),y)                       !! 823 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
1048 # ld.lld before 15 did not support -z pack-re !! 824 LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
1049 LDFLAGS_vmlinux += $(call ld-option,--pack-dy << 
1050 endif                                            825 endif
1051                                                  826 
1052 # We never want expected sections to be place !! 827 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1053 # linker. All sections should be explicitly n !! 828 LDFLAGS_vmlinux += $(call ld-option, -X,)
1054 ifdef CONFIG_LD_ORPHAN_WARN                   << 
1055 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG << 
1056 endif                                            829 endif
1057                                                  830 
1058 # Align the bit size of userspace programs wi << 
1059 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --ta << 
1060 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta << 
1061                                               << 
1062 # make the checker run with the right archite << 
1063 CHECKFLAGS += --arch=$(ARCH)                  << 
1064                                               << 
1065 # insure the checker run with the right endia << 
1066 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- << 
1067                                               << 
1068 # the checker needs the correct machine size  << 
1069 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) << 
1070                                               << 
1071 # Default kernel image to build when no speci    831 # Default kernel image to build when no specific target is given.
1072 # KBUILD_IMAGE may be overruled on the comman    832 # KBUILD_IMAGE may be overruled on the command line or
1073 # set in the environment                         833 # set in the environment
1074 # Also any assignments in arch/$(ARCH)/Makefi    834 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1075 # this default value                             835 # this default value
1076 export KBUILD_IMAGE ?= vmlinux                   836 export KBUILD_IMAGE ?= vmlinux
1077                                                  837 
1078 #                                                838 #
1079 # INSTALL_PATH specifies where to place the u    839 # INSTALL_PATH specifies where to place the updated kernel and system map
1080 # images. Default is /boot, but you can set i    840 # images. Default is /boot, but you can set it to other values
1081 export  INSTALL_PATH ?= /boot                    841 export  INSTALL_PATH ?= /boot
1082                                                  842 
1083 #                                                843 #
1084 # INSTALL_DTBS_PATH specifies a prefix for re    844 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1085 # Like INSTALL_MOD_PATH, it isn't defined in     845 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1086 # an argument if needed. Otherwise it default    846 # an argument if needed. Otherwise it defaults to the kernel install path
1087 #                                                847 #
1088 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d    848 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1089                                                  849 
1090 #                                                850 #
1091 # INSTALL_MOD_PATH specifies a prefix to MODL    851 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1092 # relocations required by build roots.  This     852 # relocations required by build roots.  This is not defined in the
1093 # makefile but the argument can be passed to     853 # makefile but the argument can be passed to make if needed.
1094 #                                                854 #
1095                                                  855 
1096 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    856 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1097 export MODLIB                                    857 export MODLIB
1098                                                  858 
1099 PHONY += prepare0                             !! 859 #
1100                                               !! 860 # INSTALL_MOD_STRIP, if defined, will cause modules to be
1101 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 861 # stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
1102 export MODORDER := $(extmod_prefix)modules.or !! 862 # the default option --strip-debug will be used.  Otherwise,
1103 export MODULES_NSDEPS := $(extmod_prefix)modu !! 863 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
1104                                               !! 864 
1105 ifeq ($(KBUILD_EXTMOD),)                      !! 865 ifdef INSTALL_MOD_STRIP
                                                   >> 866 ifeq ($(INSTALL_MOD_STRIP),1)
                                                   >> 867 mod_strip_cmd = $(STRIP) --strip-debug
                                                   >> 868 else
                                                   >> 869 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
                                                   >> 870 endif # INSTALL_MOD_STRIP=1
                                                   >> 871 else
                                                   >> 872 mod_strip_cmd = true
                                                   >> 873 endif # INSTALL_MOD_STRIP
                                                   >> 874 export mod_strip_cmd
                                                   >> 875 
                                                   >> 876 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
                                                   >> 877 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 878 # or CONFIG_MODULE_COMPRESS_XZ.
                                                   >> 879 
                                                   >> 880 mod_compress_cmd = true
                                                   >> 881 ifdef CONFIG_MODULE_COMPRESS
                                                   >> 882   ifdef CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 883     mod_compress_cmd = gzip -n -f
                                                   >> 884   endif # CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 885   ifdef CONFIG_MODULE_COMPRESS_XZ
                                                   >> 886     mod_compress_cmd = xz -f
                                                   >> 887   endif # CONFIG_MODULE_COMPRESS_XZ
                                                   >> 888 endif # CONFIG_MODULE_COMPRESS
                                                   >> 889 export mod_compress_cmd
                                                   >> 890 
                                                   >> 891 # Select initial ramdisk compression format, default is gzip(1).
                                                   >> 892 # This shall be used by the dracut(8) tool while creating an initramfs image.
                                                   >> 893 #
                                                   >> 894 INITRD_COMPRESS-y                  := gzip
                                                   >> 895 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
                                                   >> 896 INITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
                                                   >> 897 INITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
                                                   >> 898 INITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
                                                   >> 899 INITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4
                                                   >> 900 # do not export INITRD_COMPRESS, since we didn't actually
                                                   >> 901 # choose a sane default compression above.
                                                   >> 902 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1106                                                  903 
1107 build-dir       := .                          !! 904 ifdef CONFIG_MODULE_SIG_ALL
1108 clean-dirs      := $(sort . Documentation \   !! 905 $(eval $(call config_filename,MODULE_SIG_KEY))
1109                      $(patsubst %/,%,$(filter << 
1110                         $(drivers-) $(libs-)) << 
1111                                               << 
1112 export ARCH_CORE        := $(core-y)          << 
1113 export ARCH_LIB         := $(filter %/, $(lib << 
1114 export ARCH_DRIVERS     := $(drivers-y) $(dri << 
1115 # Externally visible symbols (used by link-vm << 
1116                                                  906 
1117 KBUILD_VMLINUX_OBJS := ./built-in.a           !! 907 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1118 ifdef CONFIG_MODULES                          << 
1119 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a << 
1120 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib << 
1121 else                                             908 else
1122 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 909 mod_sign_cmd = true
                                                   >> 910 endif
                                                   >> 911 export mod_sign_cmd
                                                   >> 912 
                                                   >> 913 ifdef CONFIG_STACK_VALIDATION
                                                   >> 914   has_libelf := $(call try-run,\
                                                   >> 915                 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
                                                   >> 916   ifeq ($(has_libelf),1)
                                                   >> 917     objtool_target := tools/objtool FORCE
                                                   >> 918   else
                                                   >> 919     $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
                                                   >> 920     SKIP_STACK_VALIDATION := 1
                                                   >> 921     export SKIP_STACK_VALIDATION
                                                   >> 922   endif
1123 endif                                            923 endif
1124                                                  924 
1125 export KBUILD_VMLINUX_LIBS                    << 
1126 export KBUILD_LDS          := arch/$(SRCARCH) << 
1127                                                  925 
                                                   >> 926 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 927 core-y          += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
                                                   >> 928 
                                                   >> 929 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
                                                   >> 930                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
                                                   >> 931                      $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
                                                   >> 932 
                                                   >> 933 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
                                                   >> 934                      $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
                                                   >> 935 
                                                   >> 936 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
                                                   >> 937 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
                                                   >> 938 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
                                                   >> 939 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
                                                   >> 940 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
                                                   >> 941 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
                                                   >> 942 libs-y          := $(libs-y1) $(libs-y2)
                                                   >> 943 virt-y          := $(patsubst %/, %/built-in.o, $(virt-y))
                                                   >> 944 
                                                   >> 945 # Externally visible symbols (used by link-vmlinux.sh)
                                                   >> 946 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
                                                   >> 947 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
                                                   >> 948 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
                                                   >> 949 export LDFLAGS_vmlinux
                                                   >> 950 # used by scripts/pacmage/Makefile
                                                   >> 951 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
                                                   >> 952 
                                                   >> 953 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
                                                   >> 954 
                                                   >> 955 # Include targets which we want to execute sequentially if the rest of the
                                                   >> 956 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
                                                   >> 957 # evaluated more than once.
                                                   >> 958 PHONY += vmlinux_prereq
                                                   >> 959 vmlinux_prereq: $(vmlinux-deps) FORCE
                                                   >> 960 ifdef CONFIG_HEADERS_CHECK
                                                   >> 961         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
                                                   >> 962 endif
                                                   >> 963 ifdef CONFIG_GDB_SCRIPTS
                                                   >> 964         $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
                                                   >> 965 endif
1128 ifdef CONFIG_TRIM_UNUSED_KSYMS                   966 ifdef CONFIG_TRIM_UNUSED_KSYMS
1129 # For the kernel to actually contain only the !! 967         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1130 # we have to build modules as well to determi !! 968           "$(MAKE) -f $(srctree)/Makefile vmlinux"
1131 KBUILD_MODULES := 1                           << 
1132 endif                                            969 endif
1133                                                  970 
1134 # '$(AR) mPi' needs 'T' to workaround the bug !! 971 # standalone target for easier testing
1135 quiet_cmd_ar_vmlinux.a = AR      $@           !! 972 include/generated/autoksyms.h: FORCE
1136       cmd_ar_vmlinux.a = \                    !! 973         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
1137         rm -f $@; \                           << 
1138         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 
1139         $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 
1140                                               << 
1141 targets += vmlinux.a                          << 
1142 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 
1143         $(call if_changed,ar_vmlinux.a)       << 
1144                                               << 
1145 PHONY += vmlinux_o                            << 
1146 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)   << 
1147         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1148                                                  974 
1149 vmlinux.o modules.builtin.modinfo modules.bui !! 975 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1150         @:                                    !! 976 
                                                   >> 977 # Final link of vmlinux with optional arch pass after final link
                                                   >> 978     cmd_link-vmlinux =                                                 \
                                                   >> 979         $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ;       \
                                                   >> 980         $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
                                                   >> 981 
                                                   >> 982 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
                                                   >> 983         +$(call if_changed,link-vmlinux)
1151                                                  984 
1152 PHONY += vmlinux                              !! 985 # Build samples along the rest of the kernel
1153 # LDFLAGS_vmlinux in the top Makefile defines !! 986 ifdef CONFIG_SAMPLES
1154 # not for decompressors. LDFLAGS_vmlinux in a !! 987 vmlinux-dirs += samples
1155 # unrelated; the decompressors just happen to !! 988 endif
1156 # arch/*/boot/compressed/vmlinux.             << 
1157 # Export LDFLAGS_vmlinux only to scripts/Make << 
1158 #                                             << 
1159 # _LDFLAGS_vmlinux is a workaround for the 'p << 
1160 #   https://savannah.gnu.org/bugs/?61463      << 
1161 # For Make > 4.4, the following simple code w << 
1162 #  vmlinux: private export LDFLAGS_vmlinux := << 
1163 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 
1164 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 
1165 vmlinux: vmlinux.o $(KBUILD_LDS) modpost      << 
1166         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1167                                                  989 
1168 # The actual objects are generated when desce    990 # The actual objects are generated when descending,
1169 # make sure no implicit rule kicks in            991 # make sure no implicit rule kicks in
1170 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 992 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1171                                                  993 
1172 ifeq ($(origin KERNELRELEASE),file)           !! 994 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1173 filechk_kernel.release = $(srctree)/scripts/s !! 995 # Preset locale variables to speed up the build process. Limit locale
1174 else                                          !! 996 # tweaks to this spot to avoid wrong language settings when running
1175 filechk_kernel.release = echo $(KERNELRELEASE !! 997 # make menuconfig etc.
1176 endif                                         !! 998 # Error messages still appears in the original language
                                                   >> 999 
                                                   >> 1000 PHONY += $(vmlinux-dirs)
                                                   >> 1001 $(vmlinux-dirs): prepare scripts
                                                   >> 1002         $(Q)$(MAKE) $(build)=$@
                                                   >> 1003 
                                                   >> 1004 define filechk_kernel.release
                                                   >> 1005         echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
                                                   >> 1006 endef
1177                                                  1007 
1178 # Store (new) KERNELRELEASE string in include    1008 # Store (new) KERNELRELEASE string in include/config/kernel.release
1179 include/config/kernel.release: FORCE          !! 1009 include/config/kernel.release: include/config/auto.conf FORCE
1180         $(call filechk,kernel.release)           1010         $(call filechk,kernel.release)
1181                                                  1011 
1182 # Additional helpers built in scripts/        << 
1183 # Carefully list dependencies so we do not tr << 
1184 # in parallel                                 << 
1185 PHONY += scripts                              << 
1186 scripts: scripts_basic scripts_dtc            << 
1187         $(Q)$(MAKE) $(build)=$(@)             << 
1188                                                  1012 
1189 # Things we need to do before we recursively     1013 # Things we need to do before we recursively start building the kernel
1190 # or the modules are listed in "prepare".        1014 # or the modules are listed in "prepare".
1191 # A multi level approach is used. prepareN is    1015 # A multi level approach is used. prepareN is processed before prepareN-1.
1192 # archprepare is used in arch Makefiles and w    1016 # archprepare is used in arch Makefiles and when processed asm symlink,
1193 # version.h and scripts_basic is processed /     1017 # version.h and scripts_basic is processed / created.
1194                                                  1018 
1195 PHONY += prepare archprepare                  !! 1019 # Listed in dependency order
                                                   >> 1020 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1196                                                  1021 
1197 archprepare: outputmakefile archheaders archs !! 1022 # prepare3 is used to check if we are building in a separate output directory,
1198         asm-generic $(version_h) include/gene !! 1023 # and if so do:
1199         include/generated/compile.h include/g !! 1024 # 1) Check that make has not been executed in the kernel src $(srctree)
1200                                               !! 1025 prepare3: include/config/kernel.release
1201 prepare0: archprepare                         !! 1026 ifneq ($(KBUILD_SRC),)
1202         $(Q)$(MAKE) $(build)=scripts/mod      !! 1027         @$(kecho) '  Using $(srctree) as source for kernel'
1203         $(Q)$(MAKE) $(build)=. prepare        !! 1028         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
                                                   >> 1029                 echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
                                                   >> 1030                 echo >&2 "  in the '$(srctree)' directory.";\
                                                   >> 1031                 /bin/false; \
                                                   >> 1032         fi;
                                                   >> 1033 endif
                                                   >> 1034 
                                                   >> 1035 # prepare2 creates a makefile if using a separate output directory.
                                                   >> 1036 # From this point forward, .config has been reprocessed, so any rules
                                                   >> 1037 # that need to depend on updated CONFIG_* values can be checked here.
                                                   >> 1038 prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
                                                   >> 1039 
                                                   >> 1040 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
                                                   >> 1041                    include/config/auto.conf
                                                   >> 1042         $(cmd_crmodverdir)
1204                                                  1043 
1205 # All the preparing..                         !! 1044 archprepare: archheaders archscripts prepare1 scripts_basic
1206 prepare: prepare0                             << 
1207 ifdef CONFIG_RUST                             << 
1208         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1209         $(Q)$(MAKE) $(build)=rust             << 
1210 endif                                         << 
1211                                                  1045 
1212 PHONY += remove-stale-files                   !! 1046 prepare0: archprepare gcc-plugins
1213 remove-stale-files:                           !! 1047         $(Q)$(MAKE) $(build)=.
1214         $(Q)$(srctree)/scripts/remove-stale-f << 
1215                                                  1048 
1216 # Support for using generic headers in asm-ge !! 1049 # All the preparing..
1217 asm-generic := -f $(srctree)/scripts/Makefile !! 1050 prepare: prepare0 prepare-objtool
1218                                                  1051 
1219 PHONY += asm-generic uapi-asm-generic         !! 1052 PHONY += prepare-objtool
1220 asm-generic: uapi-asm-generic                 !! 1053 prepare-objtool: $(objtool_target)
1221         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1054 
1222         generic=include/asm-generic           !! 1055 # Check for CONFIG flags that require compiler support. Abort the build
1223 uapi-asm-generic:                             !! 1056 # after .config has been processed, but before the kernel build starts.
1224         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1057 #
1225         generic=include/uapi/asm-generic      !! 1058 # For security-sensitive CONFIG options, we don't want to fallback and/or
                                                   >> 1059 # silently change which compiler flags will be used, since that leads to
                                                   >> 1060 # producing kernels with different security feature characteristics
                                                   >> 1061 # depending on the compiler used. (For example, "But I selected
                                                   >> 1062 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
                                                   >> 1063 PHONY += prepare-compiler-check
                                                   >> 1064 prepare-compiler-check: FORCE
                                                   >> 1065 # Make sure compiler supports requested stack protector flag.
                                                   >> 1066 ifdef stackp-name
                                                   >> 1067   ifeq ($(call cc-option, $(stackp-flag)),)
                                                   >> 1068         @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                                                   >> 1069                   $(stackp-flag) not supported by compiler >&2 && exit 1
                                                   >> 1070   endif
                                                   >> 1071 endif
                                                   >> 1072 # Make sure compiler does not have buggy stack-protector support.
                                                   >> 1073 ifdef stackp-check
                                                   >> 1074   ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
                                                   >> 1075         @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
                                                   >> 1076                   $(stackp-flag) available but compiler is broken >&2 && exit 1
                                                   >> 1077   endif
                                                   >> 1078 endif
                                                   >> 1079         @:
1226                                                  1080 
1227 # Generate some files                            1081 # Generate some files
1228 # -------------------------------------------    1082 # ---------------------------------------------------------------------------
1229                                                  1083 
1230 # KERNELRELEASE can change from a few differe    1084 # KERNELRELEASE can change from a few different places, meaning version.h
1231 # needs to be updated, so this check is force    1085 # needs to be updated, so this check is forced on all builds
1232                                                  1086 
1233 uts_len := 64                                    1087 uts_len := 64
1234 define filechk_utsrelease.h                      1088 define filechk_utsrelease.h
1235         if [ `echo -n "$(KERNELRELEASE)" | wc    1089         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1236           echo '"$(KERNELRELEASE)" exceeds $(    1090           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1237           exit 1;                                1091           exit 1;                                                         \
1238         fi;                                      1092         fi;                                                               \
1239         echo \#define UTS_RELEASE \"$(KERNELR !! 1093         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1240 endef                                            1094 endef
1241                                                  1095 
1242 define filechk_version.h                         1096 define filechk_version.h
1243         if [ $(SUBLEVEL) -gt 255 ]; then      !! 1097         (echo \#define LINUX_VERSION_CODE $(shell                         \
1244                 echo \#define LINUX_VERSION_C !! 1098         expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1245                 expr $(VERSION) \* 65536 + $( !! 1099         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1246         else                                  << 
1247                 echo \#define LINUX_VERSION_C << 
1248                 expr $(VERSION) \* 65536 + $( << 
1249         fi;                                   << 
1250         echo '#define KERNEL_VERSION(a,b,c) ( << 
1251         ((c) > 255 ? 255 : (c)))';            << 
1252         echo \#define LINUX_VERSION_MAJOR $(V << 
1253         echo \#define LINUX_VERSION_PATCHLEVE << 
1254         echo \#define LINUX_VERSION_SUBLEVEL  << 
1255 endef                                            1100 endef
1256                                                  1101 
1257 $(version_h): private PATCHLEVEL := $(or $(PA !! 1102 $(version_h): $(srctree)/Makefile FORCE
1258 $(version_h): private SUBLEVEL := $(or $(SUBL << 
1259 $(version_h): FORCE                           << 
1260         $(call filechk,version.h)                1103         $(call filechk,version.h)
                                                   >> 1104         $(Q)rm -f $(old_version_h)
1261                                                  1105 
1262 include/generated/utsrelease.h: include/confi    1106 include/generated/utsrelease.h: include/config/kernel.release FORCE
1263         $(call filechk,utsrelease.h)             1107         $(call filechk,utsrelease.h)
1264                                                  1108 
1265 filechk_compile.h = $(srctree)/scripts/mkcomp << 
1266         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 
1267                                               << 
1268 include/generated/compile.h: FORCE            << 
1269         $(call filechk,compile.h)             << 
1270                                               << 
1271 PHONY += headerdep                               1109 PHONY += headerdep
1272 headerdep:                                       1110 headerdep:
1273         $(Q)find $(srctree)/include/ -name '*    1111         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1274         $(srctree)/scripts/headerdep.pl -I$(s    1112         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1275                                                  1113 
1276 # -------------------------------------------    1114 # ---------------------------------------------------------------------------
                                                   >> 1115 # Firmware install
                                                   >> 1116 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
                                                   >> 1117 export INSTALL_FW_PATH
                                                   >> 1118 
                                                   >> 1119 PHONY += firmware_install
                                                   >> 1120 firmware_install:
                                                   >> 1121         @mkdir -p $(objtree)/firmware
                                                   >> 1122         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
                                                   >> 1123 
                                                   >> 1124 # ---------------------------------------------------------------------------
1277 # Kernel headers                                 1125 # Kernel headers
1278                                                  1126 
1279 #Default location for installed headers          1127 #Default location for installed headers
1280 export INSTALL_HDR_PATH = $(objtree)/usr         1128 export INSTALL_HDR_PATH = $(objtree)/usr
1281                                                  1129 
1282 quiet_cmd_headers_install = INSTALL $(INSTALL !! 1130 # If we do an all arch process set dst to asm-$(hdr-arch)
1283       cmd_headers_install = \                 !! 1131 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1284         mkdir -p $(INSTALL_HDR_PATH); \       << 
1285         rsync -mrl --include='*/' --include=' << 
1286         usr/include $(INSTALL_HDR_PATH)       << 
1287                                                  1132 
1288 PHONY += headers_install                      !! 1133 PHONY += archheaders
1289 headers_install: headers                      !! 1134 archheaders:
1290         $(call cmd,headers_install)           << 
1291                                                  1135 
1292 PHONY += archheaders archscripts              !! 1136 PHONY += archscripts
                                                   >> 1137 archscripts:
1293                                                  1138 
1294 hdr-inst := -f $(srctree)/scripts/Makefile.he !! 1139 PHONY += __headers
                                                   >> 1140 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts
                                                   >> 1141         $(Q)$(MAKE) $(build)=scripts build_unifdef
                                                   >> 1142 
                                                   >> 1143 PHONY += headers_install_all
                                                   >> 1144 headers_install_all:
                                                   >> 1145         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1295                                                  1146 
1296 PHONY += headers                              !! 1147 PHONY += headers_install
1297 headers: $(version_h) scripts_unifdef uapi-as !! 1148 headers_install: __headers
1298         $(if $(filter um, $(SRCARCH)), $(erro !! 1149         $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
                                                   >> 1150           $(error Headers not exportable for the $(SRCARCH) architecture))
1299         $(Q)$(MAKE) $(hdr-inst)=include/uapi     1151         $(Q)$(MAKE) $(hdr-inst)=include/uapi
1300         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC !! 1152         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1301                                                  1153 
1302 ifdef CONFIG_HEADERS_INSTALL                  !! 1154 PHONY += headers_check_all
1303 prepare: headers                              !! 1155 headers_check_all: headers_install_all
1304 endif                                         !! 1156         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1305                                               !! 1157 
1306 PHONY += scripts_unifdef                      !! 1158 PHONY += headers_check
1307 scripts_unifdef: scripts_basic                !! 1159 headers_check: headers_install
1308         $(Q)$(MAKE) $(build)=scripts scripts/ !! 1160         $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1309                                               !! 1161         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1310 # ------------------------------------------- << 
1311 # Install                                     << 
1312                                               << 
1313 # Many distributions have the custom install  << 
1314 # If DKMS is installed, 'make install' will e << 
1315 # to this Makefile to build and install exter << 
1316 # Cancel sub_make_done so that options such a << 
1317                                               << 
1318 quiet_cmd_install = INSTALL $(INSTALL_PATH)   << 
1319       cmd_install = unset sub_make_done; $(sr << 
1320                                               << 
1321 # ------------------------------------------- << 
1322 # vDSO install                                << 
1323                                               << 
1324 PHONY += vdso_install                         << 
1325 vdso_install: export INSTALL_FILES = $(vdso-i << 
1326 vdso_install:                                 << 
1327         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1328                                               << 
1329 # ------------------------------------------- << 
1330 # Tools                                       << 
1331                                               << 
1332 ifdef CONFIG_OBJTOOL                          << 
1333 prepare: tools/objtool                        << 
1334 endif                                         << 
1335                                               << 
1336 ifdef CONFIG_BPF                              << 
1337 ifdef CONFIG_DEBUG_INFO_BTF                   << 
1338 prepare: tools/bpf/resolve_btfids             << 
1339 endif                                         << 
1340 endif                                         << 
1341                                               << 
1342 # The tools build system is not a part of Kbu << 
1343 # its own unique issues. If you need to integ << 
1344 # please consider locating that tool outside  << 
1345 # standard Kbuild "hostprogs" syntax instead  << 
1346 # here. See Documentation/kbuild/makefiles.rs << 
1347                                               << 
1348 PHONY += resolve_btfids_clean                 << 
1349                                               << 
1350 resolve_btfids_O = $(abspath $(objtree))/tool << 
1351                                               << 
1352 # tools/bpf/resolve_btfids directory might no << 
1353 # in output directory, skip its clean in that << 
1354 resolve_btfids_clean:                         << 
1355 ifneq ($(wildcard $(resolve_btfids_O)),)      << 
1356         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ << 
1357 endif                                         << 
1358                                               << 
1359 # Clear a bunch of variables before executing << 
1360 ifeq ($(quiet),silent_)                       << 
1361 tools_silent=s                                << 
1362 endif                                         << 
1363                                               << 
1364 tools/: FORCE                                 << 
1365         $(Q)mkdir -p $(objtree)/tools         << 
1366         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1367                                               << 
1368 tools/%: FORCE                                << 
1369         $(Q)mkdir -p $(objtree)/tools         << 
1370         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1371                                                  1162 
1372 # -------------------------------------------    1163 # ---------------------------------------------------------------------------
1373 # Kernel selftest                                1164 # Kernel selftest
1374                                                  1165 
1375 PHONY += kselftest                               1166 PHONY += kselftest
1376 kselftest: headers                            !! 1167 kselftest:
1377         $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1168         $(Q)$(MAKE) -C tools/testing/selftests run_tests
1378                                                  1169 
1379 kselftest-%: headers FORCE                    !! 1170 kselftest-clean:
1380         $(Q)$(MAKE) -C $(srctree)/tools/testi !! 1171         $(Q)$(MAKE) -C tools/testing/selftests clean
1381                                                  1172 
1382 PHONY += kselftest-merge                         1173 PHONY += kselftest-merge
1383 kselftest-merge:                                 1174 kselftest-merge:
1384         $(if $(wildcard $(objtree)/.config),,    1175         $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1385         $(Q)find $(srctree)/tools/testing/sel !! 1176         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1386                 xargs $(srctree)/scripts/kcon !! 1177                 -m $(objtree)/.config \
1387         $(Q)$(MAKE) -f $(srctree)/Makefile ol !! 1178                 $(srctree)/tools/testing/selftests/*/config
                                                   >> 1179         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1388                                                  1180 
1389 # -------------------------------------------    1181 # ---------------------------------------------------------------------------
1390 # Devicetree files                            !! 1182 # Modules
1391                                               << 
1392 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ << 
1393 dtstree := arch/$(SRCARCH)/boot/dts           << 
1394 endif                                         << 
1395                                               << 
1396 ifneq ($(dtstree),)                           << 
1397                                               << 
1398 %.dtb: dtbs_prepare                           << 
1399         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1400                                               << 
1401 %.dtbo: dtbs_prepare                          << 
1402         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1403                                                  1183 
1404 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1184 ifdef CONFIG_MODULES
1405 dtbs: dtbs_prepare                            << 
1406         $(Q)$(MAKE) $(build)=$(dtstree) need- << 
1407                                                  1185 
1408 # include/config/kernel.release is actually n !! 1186 # By default, build modules as well
1409 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) << 
1410 # dtbs_install depend on it as dtbs_install m << 
1411 dtbs_prepare: include/config/kernel.release s << 
1412                                                  1187 
1413 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), !! 1188 all: modules
1414 export CHECK_DTBS=y                           << 
1415 endif                                         << 
1416                                                  1189 
1417 ifneq ($(CHECK_DTBS),)                        !! 1190 # Build modules
1418 dtbs_prepare: dt_binding_schemas              !! 1191 #
1419 endif                                         !! 1192 # A module can be listed more than once in obj-m resulting in
                                                   >> 1193 # duplicate lines in modules.order files.  Those are removed
                                                   >> 1194 # using awk while concatenating to the final file.
                                                   >> 1195 
                                                   >> 1196 PHONY += modules
                                                   >> 1197 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
                                                   >> 1198         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
                                                   >> 1199         @$(kecho) '  Building modules, stage 2.';
                                                   >> 1200         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
                                                   >> 1201         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1420                                                  1202 
1421 dtbs_check: dtbs                              !! 1203 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
                                                   >> 1204         $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1422                                                  1205 
1423 dtbs_install:                                 !! 1206 %/modules.builtin: include/config/auto.conf
1424         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1207         $(Q)$(MAKE) $(modbuiltin)=$*
1425                                                  1208 
1426 ifdef CONFIG_OF_EARLY_FLATTREE                << 
1427 all: dtbs                                     << 
1428 endif                                         << 
1429                                                  1209 
1430 endif                                         !! 1210 # Target to prepare building external modules
                                                   >> 1211 PHONY += modules_prepare
                                                   >> 1212 modules_prepare: prepare scripts
1431                                                  1213 
1432 PHONY += scripts_dtc                          !! 1214 # Target to install modules
1433 scripts_dtc: scripts_basic                    !! 1215 PHONY += modules_install
1434         $(Q)$(MAKE) $(build)=scripts/dtc      !! 1216 modules_install: _modinst_ _modinst_post
                                                   >> 1217 
                                                   >> 1218 PHONY += _modinst_
                                                   >> 1219 _modinst_:
                                                   >> 1220         @rm -rf $(MODLIB)/kernel
                                                   >> 1221         @rm -f $(MODLIB)/source
                                                   >> 1222         @mkdir -p $(MODLIB)/kernel
                                                   >> 1223         @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
                                                   >> 1224         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                                                   >> 1225                 rm -f $(MODLIB)/build ; \
                                                   >> 1226                 ln -s $(CURDIR) $(MODLIB)/build ; \
                                                   >> 1227         fi
                                                   >> 1228         @cp -f $(objtree)/modules.order $(MODLIB)/
                                                   >> 1229         @cp -f $(objtree)/modules.builtin $(MODLIB)/
                                                   >> 1230         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1231 
                                                   >> 1232 # This depmod is only for convenience to give the initial
                                                   >> 1233 # boot a modules.dep even before / is mounted read-write.  However the
                                                   >> 1234 # boot script depmod is the master version.
                                                   >> 1235 PHONY += _modinst_post
                                                   >> 1236 _modinst_post: _modinst_
                                                   >> 1237         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
                                                   >> 1238         $(call cmd,depmod)
1435                                                  1239 
1436 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1240 ifeq ($(CONFIG_MODULE_SIG), y)
1437 export CHECK_DTBS=y                           !! 1241 PHONY += modules_sign
                                                   >> 1242 modules_sign:
                                                   >> 1243         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1438 endif                                            1244 endif
1439                                                  1245 
1440 PHONY += dt_binding_check dt_binding_schemas  !! 1246 else # CONFIG_MODULES
1441 dt_binding_check: dt_binding_schemas scripts_ << 
1442         $(Q)$(MAKE) $(build)=Documentation/de << 
1443                                               << 
1444 dt_binding_schemas:                           << 
1445         $(Q)$(MAKE) $(build)=Documentation/de << 
1446                                               << 
1447 PHONY += dt_compatible_check                  << 
1448 dt_compatible_check: dt_binding_schemas       << 
1449         $(Q)$(MAKE) $(build)=Documentation/de << 
1450                                                  1247 
                                                   >> 1248 # Modules not configured
1451 # -------------------------------------------    1249 # ---------------------------------------------------------------------------
1452 # Modules                                     << 
1453                                               << 
1454 ifdef CONFIG_MODULES                          << 
1455                                                  1250 
1456 # By default, build modules as well           !! 1251 PHONY += modules modules_install
1457                                               !! 1252 modules modules_install:
1458 all: modules                                  !! 1253         @echo >&2
1459                                               !! 1254         @echo >&2 "The present kernel configuration has modules disabled."
1460 # When we're building modules with modversion !! 1255         @echo >&2 "Type 'make config' and enable loadable module support."
1461 # the built-in objects during the descend as  !! 1256         @echo >&2 "Then build a kernel with module support enabled."
1462 # make sure the checksums are up to date befo !! 1257         @echo >&2
1463 ifdef CONFIG_MODVERSIONS                      !! 1258         @exit 1
1464   KBUILD_BUILTIN := 1                         << 
1465 endif                                         << 
1466                                               << 
1467 # Build modules                               << 
1468 #                                             << 
1469                                               << 
1470 # *.ko are usually independent of vmlinux, bu << 
1471 # is an exception.                            << 
1472 ifdef CONFIG_DEBUG_INFO_BTF_MODULES           << 
1473 KBUILD_BUILTIN := 1                           << 
1474 modules: vmlinux                              << 
1475 endif                                         << 
1476                                               << 
1477 modules: modules_prepare                      << 
1478                                               << 
1479 # Target to prepare building external modules << 
1480 modules_prepare: prepare                      << 
1481         $(Q)$(MAKE) $(build)=scripts scripts/ << 
1482                                                  1259 
1483 endif # CONFIG_MODULES                           1260 endif # CONFIG_MODULES
1484                                                  1261 
1485 ###                                              1262 ###
1486 # Cleaning is done on three levels.              1263 # Cleaning is done on three levels.
1487 # make clean     Delete most generated files     1264 # make clean     Delete most generated files
1488 #                Leave enough to build extern    1265 #                Leave enough to build external modules
1489 # make mrproper  Delete the current configura    1266 # make mrproper  Delete the current configuration, and all generated files
1490 # make distclean Remove editor backup files,     1267 # make distclean Remove editor backup files, patch leftover files and the like
1491                                                  1268 
1492 # Directories & files removed with 'make clea    1269 # Directories & files removed with 'make clean'
1493 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1270 CLEAN_DIRS  += $(MODVERDIR)
1494                modules.builtin modules.builti << 
1495                modules.builtin.ranges vmlinux << 
1496                compile_commands.json rust/tes << 
1497                rust-project.json .vmlinux.obj << 
1498                                                  1271 
1499 # Directories & files removed with 'make mrpr    1272 # Directories & files removed with 'make mrproper'
1500 MRPROPER_FILES += include/config include/gene !! 1273 MRPROPER_DIRS  += include/config usr/include include/generated          \
1501                   arch/$(SRCARCH)/include/gen !! 1274                   arch/*/include/generated .tmp_objdiff
1502                   debian snap tar-install PKG !! 1275 MRPROPER_FILES += .config .config.old .version .old_version \
1503                   .config .config.old .versio !! 1276                   Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1504                   Module.symvers \            !! 1277                   signing_key.pem signing_key.priv signing_key.x509     \
1505                   certs/signing_key.pem \     !! 1278                   x509.genkey extra_certificates signing_key.x509.keyid \
1506                   certs/x509.genkey \         !! 1279                   signing_key.x509.signer vmlinux-gdb.py
1507                   vmlinux-gdb.py \            << 
1508                   rpmbuild \                  << 
1509                   rust/libmacros.so           << 
1510                                                  1280 
1511 # clean - Delete most, but leave enough to bu    1281 # clean - Delete most, but leave enough to build external modules
1512 #                                                1282 #
1513 clean: private rm-files := $(CLEAN_FILES)     !! 1283 clean: rm-dirs  := $(CLEAN_DIRS)
                                                   >> 1284 clean: rm-files := $(CLEAN_FILES)
                                                   >> 1285 clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1514                                                  1286 
1515 PHONY += archclean vmlinuxclean               !! 1287 PHONY += $(clean-dirs) clean archclean vmlinuxclean
                                                   >> 1288 $(clean-dirs):
                                                   >> 1289         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1516                                                  1290 
1517 vmlinuxclean:                                    1291 vmlinuxclean:
1518         $(Q)$(CONFIG_SHELL) $(srctree)/script    1292         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1519         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f    1293         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1520                                                  1294 
1521 clean: archclean vmlinuxclean resolve_btfids_ !! 1295 clean: archclean vmlinuxclean
1522                                                  1296 
1523 # mrproper - Delete all generated files, incl    1297 # mrproper - Delete all generated files, including .config
1524 #                                                1298 #
1525 mrproper: private rm-files := $(MRPROPER_FILE !! 1299 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1526 mrproper-dirs      := $(addprefix _mrproper_, !! 1300 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
                                                   >> 1301 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1527                                                  1302 
1528 PHONY += $(mrproper-dirs) mrproper            !! 1303 PHONY += $(mrproper-dirs) mrproper archmrproper
1529 $(mrproper-dirs):                                1304 $(mrproper-dirs):
1530         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    1305         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1531                                                  1306 
1532 mrproper: clean $(mrproper-dirs)              !! 1307 mrproper: clean archmrproper $(mrproper-dirs)
                                                   >> 1308         $(call cmd,rmdirs)
1533         $(call cmd,rmfiles)                      1309         $(call cmd,rmfiles)
1534         @find . $(RCS_FIND_IGNORE) \          << 
1535                 \( -name '*.rmeta' \) \       << 
1536                 -type f -print | xargs rm -f  << 
1537                                                  1310 
1538 # distclean                                      1311 # distclean
1539 #                                                1312 #
1540 PHONY += distclean                               1313 PHONY += distclean
1541                                                  1314 
1542 distclean: mrproper                              1315 distclean: mrproper
1543         @find . $(RCS_FIND_IGNORE) \          !! 1316         @find $(srctree) $(RCS_FIND_IGNORE) \
1544                 \( -name '*.orig' -o -name '*    1317                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1545                 -o -name '*.bak' -o -name '#* !! 1318                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1546                 -o -name 'core' -o -name tags !! 1319                 -o -name '.*.rej' -o -name '*%'  -o -name 'core' \) \
1547                 -o -name GPATH -o -name GRTAG << 
1548                 -type f -print | xargs rm -f     1320                 -type f -print | xargs rm -f
1549                                                  1321 
1550                                                  1322 
1551 # Packaging of the kernel to various formats     1323 # Packaging of the kernel to various formats
1552 # -------------------------------------------    1324 # ---------------------------------------------------------------------------
                                                   >> 1325 # rpm target kept for backward compatibility
                                                   >> 1326 package-dir     := scripts/package
1553                                                  1327 
1554 %src-pkg: FORCE                                  1328 %src-pkg: FORCE
1555         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1329         $(Q)$(MAKE) $(build)=$(package-dir) $@
1556 %pkg: include/config/kernel.release FORCE        1330 %pkg: include/config/kernel.release FORCE
1557         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1331         $(Q)$(MAKE) $(build)=$(package-dir) $@
                                                   >> 1332 rpm: include/config/kernel.release FORCE
                                                   >> 1333         $(Q)$(MAKE) $(build)=$(package-dir) $@
                                                   >> 1334 
1558                                                  1335 
1559 # Brief documentation of the typical targets     1336 # Brief documentation of the typical targets used
1560 # -------------------------------------------    1337 # ---------------------------------------------------------------------------
1561                                                  1338 
1562 boards := $(wildcard $(srctree)/arch/$(SRCARC    1339 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1563 boards := $(sort $(notdir $(boards)))            1340 boards := $(sort $(notdir $(boards)))
1564 board-dirs := $(dir $(wildcard $(srctree)/arc    1341 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1565 board-dirs := $(sort $(notdir $(board-dirs:/=    1342 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1566                                                  1343 
1567 PHONY += help                                    1344 PHONY += help
1568 help:                                            1345 help:
1569         @echo  'Cleaning targets:'               1346         @echo  'Cleaning targets:'
1570         @echo  '  clean           - Remove mo    1347         @echo  '  clean           - Remove most generated files but keep the config and'
1571         @echo  '                    enough bu    1348         @echo  '                    enough build support to build external modules'
1572         @echo  '  mrproper        - Remove al    1349         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1573         @echo  '  distclean       - mrproper     1350         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1574         @echo  ''                                1351         @echo  ''
                                                   >> 1352         @echo  'Configuration targets:'
1575         @$(MAKE) -f $(srctree)/scripts/kconfi    1353         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1576         @echo  ''                                1354         @echo  ''
1577         @echo  'Other generic targets:'          1355         @echo  'Other generic targets:'
1578         @echo  '  all             - Build all    1356         @echo  '  all             - Build all targets marked with [*]'
1579         @echo  '* vmlinux         - Build the    1357         @echo  '* vmlinux         - Build the bare kernel'
1580         @echo  '* modules         - Build all    1358         @echo  '* modules         - Build all modules'
1581         @echo  '  modules_install - Install a    1359         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1582         @echo  '  vdso_install    - Install u !! 1360         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
                                                   >> 1361         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1583         @echo  '  dir/            - Build all    1362         @echo  '  dir/            - Build all files in dir and below'
1584         @echo  '  dir/file.[ois]  - Build spe    1363         @echo  '  dir/file.[ois]  - Build specified target only'
1585         @echo  '  dir/file.ll     - Build the << 
1586         @echo  '                    (requires << 
1587         @echo  '  dir/file.lst    - Build spe    1364         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1588         @echo  '                    (requires    1365         @echo  '                    (requires a recent binutils and recent build (System.map))'
1589         @echo  '  dir/file.ko     - Build mod    1366         @echo  '  dir/file.ko     - Build module including final link'
1590         @echo  '  modules_prepare - Set up fo    1367         @echo  '  modules_prepare - Set up for building external modules'
1591         @echo  '  tags/TAGS       - Generate     1368         @echo  '  tags/TAGS       - Generate tags file for editors'
1592         @echo  '  cscope          - Generate     1369         @echo  '  cscope          - Generate cscope index'
1593         @echo  '  gtags           - Generate     1370         @echo  '  gtags           - Generate GNU GLOBAL index'
1594         @echo  '  kernelrelease   - Output th    1371         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
1595         @echo  '  kernelversion   - Output th    1372         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
1596         @echo  '  image_name      - Output th    1373         @echo  '  image_name      - Output the image name (use with make -s)'
1597         @echo  '  headers_install - Install s    1374         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1598          echo  '                    (default:    1375          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1599          echo  ''                                1376          echo  ''
1600         @echo  'Static analysers:'            !! 1377         @echo  'Static analysers'
1601         @echo  '  checkstack      - Generate  !! 1378         @echo  '  checkstack      - Generate a list of stack hogs'
1602         @echo  '                    with a st !! 1379         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1603         @echo  '  versioncheck    - Sanity ch    1380         @echo  '  versioncheck    - Sanity check on version.h usage'
1604         @echo  '  includecheck    - Check for    1381         @echo  '  includecheck    - Check for duplicate included header files'
1605         @echo  '  export_report   - List the     1382         @echo  '  export_report   - List the usages of all exported symbols'
                                                   >> 1383         @echo  '  headers_check   - Sanity check on exported headers'
1606         @echo  '  headerdep       - Detect in    1384         @echo  '  headerdep       - Detect inclusion cycles in headers'
1607         @echo  '  coccicheck      - Check wit !! 1385         @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1608         @echo  '  clang-analyzer  - Check wit << 
1609         @echo  '  clang-tidy      - Check wit << 
1610         @echo  ''                             << 
1611         @echo  'Tools:'                       << 
1612         @echo  '  nsdeps          - Generate  << 
1613         @echo  ''                             << 
1614         @echo  'Kernel selftest:'             << 
1615         @echo  '  kselftest         - Build a << 
1616         @echo  '                      Build,  << 
1617         @echo  '                      running << 
1618         @echo  '                      Run as  << 
1619         @echo  '  kselftest-all     - Build k << 
1620         @echo  '  kselftest-install - Build a << 
1621         @echo  '  kselftest-clean   - Remove  << 
1622         @echo  '  kselftest-merge   - Merge a << 
1623         @echo  '                      kselfte << 
1624         @echo  ''                                1386         @echo  ''
1625         @echo  'Rust targets:'                !! 1387         @echo  'Kernel selftest'
1626         @echo  '  rustavailable   - Checks wh !! 1388         @echo  '  kselftest       - Build and run kernel selftest (run as root)'
1627         @echo  '                    available !! 1389         @echo  '                    Build, install, and boot kernel before'
1628         @echo  '  rustfmt         - Reformat  !! 1390         @echo  '                    running kselftest on it'
1629         @echo  '  rustfmtcheck    - Checks if !! 1391         @echo  '  kselftest-clean - Remove all generated kselftest files'
1630         @echo  '                    is format !! 1392         @echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existed'
1631         @echo  '  rustdoc         - Generate  !! 1393         @echo  '                    .config.'
1632         @echo  '                    (requires << 
1633         @echo  '  rusttest        - Runs the  << 
1634         @echo  '                    (requires << 
1635         @echo  '  rust-analyzer   - Generate  << 
1636         @echo  '                    (requires << 
1637         @echo  '  dir/file.[os]   - Build spe << 
1638         @echo  '  dir/file.rsi    - Build mac << 
1639         @echo  '                    Run with  << 
1640         @echo  '                    The outpu << 
1641         @echo  '  dir/file.ll     - Build the << 
1642         @echo  ''                             << 
1643         @$(if $(dtstree), \                   << 
1644                 echo 'Devicetree:'; \         << 
1645                 echo '* dtbs               -  << 
1646                 echo '  dtbs_install       -  << 
1647                 echo '  dt_binding_check   -  << 
1648                 echo '  dt_binding_schemas -  << 
1649                 echo '  dtbs_check         -  << 
1650                 echo '')                      << 
1651                                               << 
1652         @echo 'Userspace tools targets:'      << 
1653         @echo '  use "make tools/help"'       << 
1654         @echo '  or  "cd tools; make help"'   << 
1655         @echo  ''                                1394         @echo  ''
1656         @echo  'Kernel packaging:'               1395         @echo  'Kernel packaging:'
1657         @$(MAKE) -f $(srctree)/scripts/Makefi !! 1396         @$(MAKE) $(build)=$(package-dir) help
1658         @echo  ''                                1397         @echo  ''
1659         @echo  'Documentation targets:'          1398         @echo  'Documentation targets:'
1660         @$(MAKE) -f $(srctree)/Documentation/ !! 1399         @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp
                                                   >> 1400         @echo  ''
                                                   >> 1401         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1661         @echo  ''                                1402         @echo  ''
1662         @echo  'Architecture-specific targets !! 1403         @echo  'Architecture specific targets ($(SRCARCH)):'
1663         @$(or $(archhelp),\                   !! 1404         @$(if $(archhelp),$(archhelp),\
1664                 echo '  No architecture-speci !! 1405                 echo '  No architecture specific help defined for $(SRCARCH)')
1665         @echo  ''                                1406         @echo  ''
1666         @$(if $(boards), \                       1407         @$(if $(boards), \
1667                 $(foreach b, $(boards), \        1408                 $(foreach b, $(boards), \
1668                 printf "  %-27s - Build for % !! 1409                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1669                 echo '')                         1410                 echo '')
1670         @$(if $(board-dirs), \                   1411         @$(if $(board-dirs), \
1671                 $(foreach b, $(board-dirs), \    1412                 $(foreach b, $(board-dirs), \
1672                 printf "  %-16s - Show %s-spe    1413                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1673                 printf "  %-16s - Show all of    1414                 printf "  %-16s - Show all of the above\\n" help-boards; \
1674                 echo '')                         1415                 echo '')
1675                                                  1416 
1676         @echo  '  make V=n   [targets] 1: ver !! 1417         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1677         @echo  '                       2: giv !! 1418         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1678         @echo  '                       V=1 an << 
1679         @echo  '  make O=dir [targets] Locate    1419         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1680         @echo  '  make C=1   [targets] Check  !! 1420         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1681         @echo  '                       (spars << 
1682         @echo  '  make C=2   [targets] Force     1421         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1683         @echo  '  make RECORDMCOUNT_WARN=1 [t    1422         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1684         @echo  '  make W=n   [targets] Enable !! 1423         @echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
1685         @echo  '                1: warnings w    1424         @echo  '                1: warnings which may be relevant and do not occur too often'
1686         @echo  '                2: warnings w    1425         @echo  '                2: warnings which occur quite often but may still be relevant'
1687         @echo  '                3: more obscu    1426         @echo  '                3: more obscure warnings, can most likely be ignored'
1688         @echo  '                c: extra chec << 
1689         @echo  '                e: warnings a << 
1690         @echo  '                Multiple leve    1427         @echo  '                Multiple levels can be combined with W=12 or W=123'
1691         @$(if $(dtstree), \                   << 
1692                 echo '  make CHECK_DTBS=1 [ta << 
1693                 echo '         This can be ap << 
1694                 )                             << 
1695         @echo  ''                                1428         @echo  ''
1696         @echo  'Execute "make" or "make all"     1429         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1697         @echo  'For further info see the ./RE    1430         @echo  'For further info see the ./README file'
1698                                                  1431 
1699                                                  1432 
1700 help-board-dirs := $(addprefix help-,$(board-    1433 help-board-dirs := $(addprefix help-,$(board-dirs))
1701                                                  1434 
1702 help-boards: $(help-board-dirs)                  1435 help-boards: $(help-board-dirs)
1703                                                  1436 
1704 boards-per-dir = $(sort $(notdir $(wildcard $    1437 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1705                                                  1438 
1706 $(help-board-dirs): help-%:                      1439 $(help-board-dirs): help-%:
1707         @echo  'Architecture-specific targets !! 1440         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1708         @$(if $(boards-per-dir), \               1441         @$(if $(boards-per-dir), \
1709                 $(foreach b, $(boards-per-dir    1442                 $(foreach b, $(boards-per-dir), \
1710                 printf "  %-24s - Build for %    1443                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1711                 echo '')                         1444                 echo '')
1712                                                  1445 
1713                                                  1446 
1714 # Documentation targets                          1447 # Documentation targets
1715 # -------------------------------------------    1448 # ---------------------------------------------------------------------------
1716 DOC_TARGETS := xmldocs latexdocs pdfdocs html !! 1449 DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs linkcheckdocs
1717                linkcheckdocs dochelp refcheck << 
1718 PHONY += $(DOC_TARGETS)                          1450 PHONY += $(DOC_TARGETS)
1719 $(DOC_TARGETS):                               !! 1451 $(DOC_TARGETS): scripts_basic FORCE
1720         $(Q)$(MAKE) $(build)=Documentation $@ !! 1452         $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1721                                               !! 1453         $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@
1722                                               !! 1454         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1723 # Rust targets                                << 
1724 # ------------------------------------------- << 
1725                                               << 
1726 # "Is Rust available?" target                 << 
1727 PHONY += rustavailable                        << 
1728 rustavailable:                                << 
1729         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1730                                               << 
1731 # Documentation target                        << 
1732 #                                             << 
1733 # Using the singular to avoid running afoul o << 
1734 PHONY += rustdoc                              << 
1735 rustdoc: prepare                              << 
1736         $(Q)$(MAKE) $(build)=rust $@          << 
1737                                               << 
1738 # Testing target                              << 
1739 PHONY += rusttest                             << 
1740 rusttest: prepare                             << 
1741         $(Q)$(MAKE) $(build)=rust $@          << 
1742                                               << 
1743 # Formatting targets                          << 
1744 PHONY += rustfmt rustfmtcheck                 << 
1745                                               << 
1746 # We skip `rust/alloc` since we want to minim << 
1747 #                                             << 
1748 # We match using absolute paths since `find`  << 
1749 # when matching, which is a problem when e.g. << 
1750 # We `grep` afterwards in order to remove the << 
1751 rustfmt:                                      << 
1752         $(Q)find $(abs_srctree) -type f -name << 
1753                 -o -path $(abs_srctree)/rust/ << 
1754                 -o -path $(abs_objtree)/rust/ << 
1755                 | grep -Fv $(abs_srctree)/rus << 
1756                 | grep -Fv $(abs_objtree)/rus << 
1757                 | grep -Fv generated \        << 
1758                 | xargs $(RUSTFMT) $(rustfmt_ << 
1759                                               << 
1760 rustfmtcheck: rustfmt_flags = --check         << 
1761 rustfmtcheck: rustfmt                         << 
1762                                               << 
1763 # Misc                                        << 
1764 # ------------------------------------------- << 
1765                                               << 
1766 PHONY += misc-check                           << 
1767 misc-check:                                   << 
1768         $(Q)$(srctree)/scripts/misc-check     << 
1769                                               << 
1770 all: misc-check                               << 
1771                                               << 
1772 PHONY += scripts_gdb                          << 
1773 scripts_gdb: prepare0                         << 
1774         $(Q)$(MAKE) $(build)=scripts/gdb      << 
1775         $(Q)ln -fsn $(abspath $(srctree)/scri << 
1776                                               << 
1777 ifdef CONFIG_GDB_SCRIPTS                      << 
1778 all: scripts_gdb                              << 
1779 endif                                         << 
1780                                                  1455 
1781 else # KBUILD_EXTMOD                             1456 else # KBUILD_EXTMOD
1782                                                  1457 
1783 filechk_kernel.release = echo $(KERNELRELEASE << 
1784                                               << 
1785 ###                                              1458 ###
1786 # External module support.                       1459 # External module support.
1787 # When building external modules the kernel u    1460 # When building external modules the kernel used as basis is considered
1788 # read-only, and no consistency checks are ma    1461 # read-only, and no consistency checks are made and the make
1789 # system is not used on the basis kernel. If     1462 # system is not used on the basis kernel. If updates are required
1790 # in the basis kernel ordinary make commands  !! 1463 # in the basis kernel ordinary make commands (without M=...) must
                                                   >> 1464 # be used.
                                                   >> 1465 #
                                                   >> 1466 # The following are the only valid targets when building external
                                                   >> 1467 # modules.
                                                   >> 1468 # make M=dir clean     Delete all automatically generated files
                                                   >> 1469 # make M=dir modules   Make all modules in specified dir
                                                   >> 1470 # make M=dir           Same as 'make M=dir modules'
                                                   >> 1471 # make M=dir modules_install
                                                   >> 1472 #                      Install the modules built in the module directory
                                                   >> 1473 #                      Assumes install directory is already created
1791                                                  1474 
1792 # We are always building only modules.        !! 1475 # We are always building modules
1793 KBUILD_BUILTIN :=                             << 
1794 KBUILD_MODULES := 1                              1476 KBUILD_MODULES := 1
                                                   >> 1477 PHONY += crmodverdir
                                                   >> 1478 crmodverdir:
                                                   >> 1479         $(cmd_crmodverdir)
                                                   >> 1480 
                                                   >> 1481 PHONY += $(objtree)/Module.symvers
                                                   >> 1482 $(objtree)/Module.symvers:
                                                   >> 1483         @test -e $(objtree)/Module.symvers || ( \
                                                   >> 1484         echo; \
                                                   >> 1485         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
                                                   >> 1486         echo "           is missing; modules will have no dependencies and modversions."; \
                                                   >> 1487         echo )
                                                   >> 1488 
                                                   >> 1489 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
                                                   >> 1490 PHONY += $(module-dirs) modules
                                                   >> 1491 $(module-dirs): crmodverdir $(objtree)/Module.symvers
                                                   >> 1492         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1795                                                  1493 
1796 build-dir := $(KBUILD_EXTMOD)                 !! 1494 modules: $(module-dirs)
                                                   >> 1495         @$(kecho) '  Building modules, stage 2.';
                                                   >> 1496         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1797                                                  1497 
1798 compile_commands.json: $(extmod_prefix)compil !! 1498 PHONY += modules_install
1799 PHONY += compile_commands.json                !! 1499 modules_install: _emodinst_ _emodinst_post
1800                                                  1500 
1801 clean-dirs := $(KBUILD_EXTMOD)                !! 1501 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1802 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1502 PHONY += _emodinst_
1803         $(KBUILD_EXTMOD)/compile_commands.jso !! 1503 _emodinst_:
1804                                               !! 1504         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1805 PHONY += prepare                              !! 1505         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1806 # now expand this into a simple variable to r !! 1506 
1807 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1507 PHONY += _emodinst_post
1808 prepare:                                      !! 1508 _emodinst_post: _emodinst_
1809         @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1509         $(call cmd,depmod)
1810                 echo >&2 "warning: the compil !! 1510 
1811                 echo >&2 "  The kernel was bu !! 1511 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1812                 echo >&2 "  You are using:    !! 1512 
1813         fi                                    !! 1513 PHONY += $(clean-dirs) clean
                                                   >> 1514 $(clean-dirs):
                                                   >> 1515         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
                                                   >> 1516 
                                                   >> 1517 clean:  rm-dirs := $(MODVERDIR)
                                                   >> 1518 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1814                                                  1519 
1815 PHONY += help                                    1520 PHONY += help
1816 help:                                            1521 help:
1817         @echo  '  Building external modules.'    1522         @echo  '  Building external modules.'
1818         @echo  '  Syntax: make -C path/to/ker    1523         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1819         @echo  ''                                1524         @echo  ''
1820         @echo  '  modules         - default t    1525         @echo  '  modules         - default target, build the module(s)'
1821         @echo  '  modules_install - install t    1526         @echo  '  modules_install - install the module'
1822         @echo  '  clean           - remove ge    1527         @echo  '  clean           - remove generated files in module directory only'
1823         @echo  '  rust-analyzer   - generate  << 
1824         @echo  ''                                1528         @echo  ''
1825                                                  1529 
1826 ifndef CONFIG_MODULES                         !! 1530 # Dummies...
1827 modules modules_install: __external_modules_e !! 1531 PHONY += prepare scripts
1828 __external_modules_error:                     !! 1532 prepare: ;
1829         @echo >&2 '***'                       !! 1533 scripts: ;
1830         @echo >&2 '*** The present kernel dis << 
1831         @echo >&2 '*** You cannot build or in << 
1832         @echo >&2 '***'                       << 
1833         @false                                << 
1834 endif                                         << 
1835                                               << 
1836 endif # KBUILD_EXTMOD                            1534 endif # KBUILD_EXTMOD
1837                                                  1535 
1838 # ------------------------------------------- << 
1839 # Modules                                     << 
1840                                               << 
1841 PHONY += modules modules_install modules_sign << 
1842                                               << 
1843 modules_install:                              << 
1844         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1845         sign-only=$(if $(filter modules_insta << 
1846                                               << 
1847 ifeq ($(CONFIG_MODULE_SIG),y)                 << 
1848 # modules_sign is a subset of modules_install << 
1849 # 'make modules_install modules_sign' is equi << 
1850 modules_sign: modules_install                 << 
1851         @:                                    << 
1852 else                                          << 
1853 modules_sign:                                 << 
1854         @echo >&2 '***'                       << 
1855         @echo >&2 '*** CONFIG_MODULE_SIG is d << 
1856         @echo >&2 '***'                       << 
1857         @false                                << 
1858 endif                                         << 
1859                                               << 
1860 ifdef CONFIG_MODULES                          << 
1861                                               << 
1862 $(MODORDER): $(build-dir)                     << 
1863         @:                                    << 
1864                                               << 
1865 # KBUILD_MODPOST_NOFINAL can be set to skip t << 
1866 # This is solely useful to speed up test comp << 
1867 modules: modpost                              << 
1868 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1869         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1870 endif                                         << 
1871                                               << 
1872 PHONY += modules_check                        << 
1873 modules_check: $(MODORDER)                    << 
1874         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1875                                               << 
1876 else # CONFIG_MODULES                         << 
1877                                               << 
1878 modules:                                      << 
1879         @:                                    << 
1880                                               << 
1881 KBUILD_MODULES :=                             << 
1882                                               << 
1883 endif # CONFIG_MODULES                        << 
1884                                               << 
1885 PHONY += modpost                              << 
1886 modpost: $(if $(single-build),, $(if $(KBUILD << 
1887          $(if $(KBUILD_MODULES), modules_chec << 
1888         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1889                                               << 
1890 # Single targets                              << 
1891 # ------------------------------------------- << 
1892 # To build individual files in subdirectories << 
1893 #                                             << 
1894 #   make foo/bar/baz.s                        << 
1895 #                                             << 
1896 # The supported suffixes for single-target ar << 
1897 #                                             << 
1898 # To build only under specific subdirectories << 
1899 #                                             << 
1900 #   make foo/bar/baz/                         << 
1901                                               << 
1902 ifdef single-build                            << 
1903                                               << 
1904 # .ko is special because modpost is needed    << 
1905 single-ko := $(sort $(filter %.ko, $(MAKECMDG << 
1906 single-no-ko := $(filter-out $(single-ko), $( << 
1907                 $(foreach x, o mod, $(patsubs << 
1908                                               << 
1909 $(single-ko): single_modules                  << 
1910         @:                                    << 
1911 $(single-no-ko): $(build-dir)                 << 
1912         @:                                    << 
1913                                               << 
1914 # Remove MODORDER when done because it is not << 
1915 PHONY += single_modules                       << 
1916 single_modules: $(single-no-ko) modules_prepa << 
1917         $(Q){ $(foreach m, $(single-ko), echo << 
1918         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1919 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1920         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1921 endif                                         << 
1922         $(Q)rm -f $(MODORDER)                 << 
1923                                               << 
1924 single-goals := $(addprefix $(build-dir)/, $( << 
1925                                               << 
1926 KBUILD_MODULES := 1                           << 
1927                                               << 
1928 endif                                         << 
1929                                               << 
1930 # Preset locale variables to speed up the bui << 
1931 # tweaks to this spot to avoid wrong language << 
1932 # make menuconfig etc.                        << 
1933 # Error messages still appears in the origina << 
1934 PHONY += $(build-dir)                         << 
1935 $(build-dir): prepare                         << 
1936         $(Q)$(MAKE) $(build)=$@ need-builtin= << 
1937                                               << 
1938 clean-dirs := $(addprefix _clean_, $(clean-di << 
1939 PHONY += $(clean-dirs) clean                  << 
1940 $(clean-dirs):                                << 
1941         $(Q)$(MAKE) $(clean)=$(patsubst _clea << 
1942                                               << 
1943 clean: $(clean-dirs)                             1536 clean: $(clean-dirs)
                                                   >> 1537         $(call cmd,rmdirs)
1944         $(call cmd,rmfiles)                      1538         $(call cmd,rmfiles)
1945         @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1539         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1946                 \( -name '*.[aios]' -o -name  !! 1540                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1947                 -o -name '*.ko.*' \              1541                 -o -name '*.ko.*' \
1948                 -o -name '*.dtb' -o -name '*. !! 1542                 -o -name '*.dwo'  \
1949                 -o -name '*.dtb.S' -o -name ' !! 1543                 -o -name '*.su'  \
1950                 -o -name '*.dt.yaml' -o -name << 
1951                 -o -name '*.dwo' -o -name '*. << 
1952                 -o -name '*.su' -o -name '*.m << 
1953                 -o -name '.*.d' -o -name '.*.    1544                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1954                 -o -name '*.lex.c' -o -name ' << 
1955                 -o -name '*.asn1.[ch]' \      << 
1956                 -o -name '*.symtypes' -o -nam    1545                 -o -name '*.symtypes' -o -name 'modules.order' \
                                                   >> 1546                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1957                 -o -name '*.c.[012]*.*' \        1547                 -o -name '*.c.[012]*.*' \
1958                 -o -name '*.ll' \             !! 1548                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1959                 -o -name '*.gcno' \           << 
1960                 \) -type f -print \           << 
1961                 -o -name '.tmp_*' -print \    << 
1962                 | xargs rm -rf                << 
1963                                                  1549 
1964 # Generate tags for editors                      1550 # Generate tags for editors
1965 # -------------------------------------------    1551 # ---------------------------------------------------------------------------
1966 quiet_cmd_tags = GEN     $@                      1552 quiet_cmd_tags = GEN     $@
1967       cmd_tags = $(BASH) $(srctree)/scripts/t !! 1553       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1968                                                  1554 
1969 tags TAGS cscope gtags: FORCE                    1555 tags TAGS cscope gtags: FORCE
1970         $(call cmd,tags)                         1556         $(call cmd,tags)
1971                                                  1557 
1972 # Generate rust-project.json (a file that des << 
1973 # Rust projects) for rust-analyzer (an implem << 
1974 # Protocol).                                  << 
1975 PHONY += rust-analyzer                        << 
1976 rust-analyzer:                                << 
1977         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1978         $(Q)$(MAKE) $(build)=rust $@          << 
1979                                               << 
1980 # Script to generate missing namespace depend << 
1981 # ------------------------------------------- << 
1982                                               << 
1983 PHONY += nsdeps                               << 
1984 nsdeps: export KBUILD_NSDEPS=1                << 
1985 nsdeps: modules                               << 
1986         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1987                                               << 
1988 # Clang Tooling                               << 
1989 # ------------------------------------------- << 
1990                                               << 
1991 quiet_cmd_gen_compile_commands = GEN     $@   << 
1992       cmd_gen_compile_commands = $(PYTHON3) $ << 
1993                                               << 
1994 $(extmod_prefix)compile_commands.json: $(srct << 
1995         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K << 
1996         $(if $(CONFIG_MODULES), $(MODORDER))  << 
1997         $(call if_changed,gen_compile_command << 
1998                                               << 
1999 targets += $(extmod_prefix)compile_commands.j << 
2000                                               << 
2001 PHONY += clang-tidy clang-analyzer            << 
2002                                               << 
2003 ifdef CONFIG_CC_IS_CLANG                      << 
2004 quiet_cmd_clang_tools = CHECK   $<            << 
2005       cmd_clang_tools = $(PYTHON3) $(srctree) << 
2006                                               << 
2007 clang-tidy clang-analyzer: $(extmod_prefix)co << 
2008         $(call cmd,clang_tools)               << 
2009 else                                          << 
2010 clang-tidy clang-analyzer:                    << 
2011         @echo "$@ requires CC=clang" >&2      << 
2012         @false                                << 
2013 endif                                         << 
2014                                               << 
2015 # Scripts to check various things for consist    1558 # Scripts to check various things for consistency
2016 # -------------------------------------------    1559 # ---------------------------------------------------------------------------
2017                                                  1560 
2018 PHONY += includecheck versioncheck coccicheck !! 1561 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2019                                                  1562 
2020 includecheck:                                    1563 includecheck:
2021         find $(srctree)/* $(RCS_FIND_IGNORE)     1564         find $(srctree)/* $(RCS_FIND_IGNORE) \
2022                 -name '*.[hcS]' -type f -prin    1565                 -name '*.[hcS]' -type f -print | sort \
2023                 | xargs $(PERL) -w $(srctree)    1566                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2024                                                  1567 
2025 versioncheck:                                    1568 versioncheck:
2026         find $(srctree)/* $(RCS_FIND_IGNORE)     1569         find $(srctree)/* $(RCS_FIND_IGNORE) \
2027                 -name '*.[hcS]' -type f -prin    1570                 -name '*.[hcS]' -type f -print | sort \
2028                 | xargs $(PERL) -w $(srctree)    1571                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2029                                                  1572 
2030 coccicheck:                                      1573 coccicheck:
2031         $(Q)$(BASH) $(srctree)/scripts/$@     !! 1574         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
                                                   >> 1575 
                                                   >> 1576 namespacecheck:
                                                   >> 1577         $(PERL) $(srctree)/scripts/namespace.pl
2032                                                  1578 
2033 export_report:                                   1579 export_report:
2034         $(PERL) $(srctree)/scripts/export_rep    1580         $(PERL) $(srctree)/scripts/export_report.pl
2035                                                  1581 
                                                   >> 1582 endif #ifeq ($(config-targets),1)
                                                   >> 1583 endif #ifeq ($(mixed-targets),1)
                                                   >> 1584 
2036 PHONY += checkstack kernelrelease kernelversi    1585 PHONY += checkstack kernelrelease kernelversion image_name
2037                                                  1586 
2038 # UML needs a little special treatment here.     1587 # UML needs a little special treatment here.  It wants to use the host
2039 # toolchain, so needs $(SUBARCH) passed to ch    1588 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2040 # else wants $(ARCH), including people doing     1589 # else wants $(ARCH), including people doing cross-builds, which means
2041 # that $(SUBARCH) doesn't work here.             1590 # that $(SUBARCH) doesn't work here.
2042 ifeq ($(ARCH), um)                               1591 ifeq ($(ARCH), um)
2043 CHECKSTACK_ARCH := $(SUBARCH)                    1592 CHECKSTACK_ARCH := $(SUBARCH)
2044 else                                             1593 else
2045 CHECKSTACK_ARCH := $(ARCH)                       1594 CHECKSTACK_ARCH := $(ARCH)
2046 endif                                            1595 endif
2047 MINSTACKSIZE    ?= 100                        << 
2048 checkstack:                                      1596 checkstack:
2049         $(OBJDUMP) -d vmlinux $$(find . -name    1597         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2050         $(PERL) $(srctree)/scripts/checkstack !! 1598         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2051                                                  1599 
2052 kernelrelease:                                   1600 kernelrelease:
2053         @$(filechk_kernel.release)            !! 1601         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2054                                                  1602 
2055 kernelversion:                                   1603 kernelversion:
2056         @echo $(KERNELVERSION)                   1604         @echo $(KERNELVERSION)
2057                                                  1605 
2058 image_name:                                      1606 image_name:
2059         @echo $(KBUILD_IMAGE)                    1607         @echo $(KBUILD_IMAGE)
2060                                                  1608 
2061 PHONY += run-command                          !! 1609 # Clear a bunch of variables before executing the submake
2062 run-command:                                  !! 1610 tools/: FORCE
2063         $(Q)$(KBUILD_RUN_COMMAND)             !! 1611         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1612         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
                                                   >> 1613 
                                                   >> 1614 tools/%: FORCE
                                                   >> 1615         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1616         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
                                                   >> 1617 
                                                   >> 1618 # Single targets
                                                   >> 1619 # ---------------------------------------------------------------------------
                                                   >> 1620 # Single targets are compatible with:
                                                   >> 1621 # - build with mixed source and output
                                                   >> 1622 # - build with separate output dir 'make O=...'
                                                   >> 1623 # - external modules
                                                   >> 1624 #
                                                   >> 1625 #  target-dir => where to store outputfile
                                                   >> 1626 #  build-dir  => directory in kernel source tree to use
                                                   >> 1627 
                                                   >> 1628 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 1629         build-dir  = $(patsubst %/,%,$(dir $@))
                                                   >> 1630         target-dir = $(dir $@)
                                                   >> 1631 else
                                                   >> 1632         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
                                                   >> 1633         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
                                                   >> 1634         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
                                                   >> 1635 endif
                                                   >> 1636 
                                                   >> 1637 %.s: %.c prepare scripts FORCE
                                                   >> 1638         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1639 %.i: %.c prepare scripts FORCE
                                                   >> 1640         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1641 %.o: %.c prepare scripts FORCE
                                                   >> 1642         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1643 %.lst: %.c prepare scripts FORCE
                                                   >> 1644         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1645 %.s: %.S prepare scripts FORCE
                                                   >> 1646         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1647 %.o: %.S prepare scripts FORCE
                                                   >> 1648         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1649 %.symtypes: %.c prepare scripts FORCE
                                                   >> 1650         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1651 
                                                   >> 1652 # Modules
                                                   >> 1653 /: prepare scripts FORCE
                                                   >> 1654         $(cmd_crmodverdir)
                                                   >> 1655         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
                                                   >> 1656         $(build)=$(build-dir)
                                                   >> 1657 # Make sure the latest headers are built for Documentation
                                                   >> 1658 Documentation/ samples/: headers_install
                                                   >> 1659 %/: prepare scripts FORCE
                                                   >> 1660         $(cmd_crmodverdir)
                                                   >> 1661         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
                                                   >> 1662         $(build)=$(build-dir)
                                                   >> 1663 %.ko: prepare scripts FORCE
                                                   >> 1664         $(cmd_crmodverdir)
                                                   >> 1665         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
                                                   >> 1666         $(build)=$(build-dir) $(@:.ko=.o)
                                                   >> 1667         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
                                                   >> 1668 
                                                   >> 1669 # FIXME Should go into a make.lib or something
                                                   >> 1670 # ===========================================================================
                                                   >> 1671 
                                                   >> 1672 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
                                                   >> 1673       cmd_rmdirs = rm -rf $(rm-dirs)
2064                                                  1674 
2065 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    1675 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
2066       cmd_rmfiles = rm -rf $(rm-files)        !! 1676       cmd_rmfiles = rm -f $(rm-files)
2067                                                  1677 
2068 # read saved command lines for existing targe !! 1678 # Run depmod only if we have System.map and depmod is executable
2069 existing-targets := $(wildcard $(sort $(targe !! 1679 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
                                                   >> 1680       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
                                                   >> 1681                    $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
2070                                                  1682 
2071 -include $(foreach f,$(existing-targets),$(di !! 1683 # Create temporary dir for module support files
                                                   >> 1684 # clean it up only when building all modules
                                                   >> 1685 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
                                                   >> 1686                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
                                                   >> 1687 
                                                   >> 1688 # read all saved command lines
                                                   >> 1689 
                                                   >> 1690 targets := $(wildcard $(sort $(targets)))
                                                   >> 1691 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
                                                   >> 1692 
                                                   >> 1693 ifneq ($(cmd_files),)
                                                   >> 1694   $(cmd_files): ;       # Do not try to update included dependency files
                                                   >> 1695   include $(cmd_files)
                                                   >> 1696 endif
2072                                                  1697 
2073 endif # config-build                          !! 1698 endif   # skip-makefile
2074 endif # mixed-build                           << 
2075 endif # need-sub-make                         << 
2076                                                  1699 
2077 PHONY += FORCE                                   1700 PHONY += FORCE
2078 FORCE:                                           1701 FORCE:
2079                                                  1702 
2080 # Declare the contents of the PHONY variable  !! 1703 # Declare the contents of the .PHONY variable as phony.  We keep that
2081 # information in a variable so we can use it     1704 # information in a variable so we can use it in if_changed and friends.
2082 .PHONY: $(PHONY)                                 1705 .PHONY: $(PHONY)
                                                      

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