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TOMOYO Linux Cross Reference
Linux/Makefile

Version: ~ [ linux-6.11.5 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.58 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.114 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.169 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.228 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.284 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.322 ] ~ [ 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-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /Makefile (Version linux-6.11.5) and /Makefile (Version linux-5.14.21)


  1 # SPDX-License-Identifier: GPL-2.0                  1 # SPDX-License-Identifier: GPL-2.0
  2 VERSION = 6                                    !!   2 VERSION = 5
  3 PATCHLEVEL = 11                                !!   3 PATCHLEVEL = 14
  4 SUBLEVEL = 5                                   !!   4 SUBLEVEL = 21
  5 EXTRAVERSION =                                      5 EXTRAVERSION =
  6 NAME = Baby Opossum Posse                      !!   6 NAME = Opossums on Parade
  7                                                     7 
  8 # *DOCUMENTATION*                                   8 # *DOCUMENTATION*
  9 # To see a list of typical targets execute "ma      9 # To see a list of typical targets execute "make help"
 10 # More info can be located in ./README             10 # More info can be located in ./README
 11 # Comments in this file are targeted only to t     11 # Comments in this file are targeted only to the developer, do not
 12 # expect to learn how to build the kernel read     12 # expect to learn how to build the kernel reading this file.
 13                                                    13 
 14 ifeq ($(filter output-sync,$(.FEATURES)),)     << 
 15 $(error GNU Make >= 4.0 is required. Your Make << 
 16 endif                                          << 
 17                                                << 
 18 $(if $(filter __%, $(MAKECMDGOALS)), \             14 $(if $(filter __%, $(MAKECMDGOALS)), \
 19         $(error targets prefixed with '__' are     15         $(error targets prefixed with '__' are only for internal use))
 20                                                    16 
 21 # That's our default target when none is given     17 # That's our default target when none is given on the command line
 22 PHONY := __all                                     18 PHONY := __all
 23 __all:                                             19 __all:
 24                                                    20 
 25 # We are using a recursive build, so we need t     21 # We are using a recursive build, so we need to do a little thinking
 26 # to get the ordering right.                       22 # to get the ordering right.
 27 #                                                  23 #
 28 # Most importantly: sub-Makefiles should only      24 # Most importantly: sub-Makefiles should only ever modify files in
 29 # their own directory. If in some directory we     25 # their own directory. If in some directory we have a dependency on
 30 # a file in another dir (which doesn't happen      26 # a file in another dir (which doesn't happen often, but it's often
 31 # unavoidable when linking the built-in.a targ     27 # unavoidable when linking the built-in.a targets which finally
 32 # turn into vmlinux), we will call a sub make      28 # turn into vmlinux), we will call a sub make in that other dir, and
 33 # after that we are sure that everything which     29 # after that we are sure that everything which is in that other dir
 34 # is now up to date.                               30 # is now up to date.
 35 #                                                  31 #
 36 # The only cases where we need to modify files     32 # The only cases where we need to modify files which have global
 37 # effects are thus separated out and done befo     33 # effects are thus separated out and done before the recursive
 38 # descending is started. They are now explicit     34 # descending is started. They are now explicitly listed as the
 39 # prepare rule.                                    35 # prepare rule.
 40                                                    36 
 41 this-makefile := $(lastword $(MAKEFILE_LIST))  << 
 42 abs_srctree := $(realpath $(dir $(this-makefil << 
 43 abs_objtree := $(CURDIR)                       << 
 44                                                << 
 45 ifneq ($(sub_make_done),1)                         37 ifneq ($(sub_make_done),1)
 46                                                    38 
 47 # Do not use make's built-in rules and variabl     39 # Do not use make's built-in rules and variables
 48 # (this increases performance and avoids hard-     40 # (this increases performance and avoids hard-to-debug behaviour)
 49 MAKEFLAGS += -rR                                   41 MAKEFLAGS += -rR
 50                                                    42 
 51 # Avoid funny character set dependencies           43 # Avoid funny character set dependencies
 52 unexport LC_ALL                                    44 unexport LC_ALL
 53 LC_COLLATE=C                                       45 LC_COLLATE=C
 54 LC_NUMERIC=C                                       46 LC_NUMERIC=C
 55 export LC_COLLATE LC_NUMERIC                       47 export LC_COLLATE LC_NUMERIC
 56                                                    48 
 57 # Avoid interference with shell env settings       49 # Avoid interference with shell env settings
 58 unexport GREP_OPTIONS                              50 unexport GREP_OPTIONS
 59                                                    51 
 60 # Beautify output                                  52 # Beautify output
 61 # --------------------------------------------     53 # ---------------------------------------------------------------------------
 62 #                                                  54 #
 63 # Most of build commands in Kbuild start with  !!  55 # Normally, we echo the whole command before executing it. By making
 64 # "quiet_cmd_*". If defined, the short log is  !!  56 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 65 # that command is printed by default.          !!  57 # $(quiet) to choose other forms of output instead, e.g.
 66 #                                              !!  58 #
 67 # e.g.)                                        !!  59 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)      !!  60 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 69 #          cmd_depmod = $(srctree)/scripts/dep !!  61 #
                                                   >>  62 # If $(quiet) is empty, the whole command will be printed.
                                                   >>  63 # If it is set to "quiet_", only the short version will be printed.
                                                   >>  64 # If it is set to "silent_", nothing will be printed at all, since
                                                   >>  65 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 70 #                                                  66 #
 71 # A simple variant is to prefix commands with      67 # A simple variant is to prefix commands with $(Q) - that's useful
 72 # for commands that shall be hidden in non-ver     68 # for commands that shall be hidden in non-verbose mode.
 73 #                                                  69 #
 74 #    $(Q)$(MAKE) $(build)=scripts/basic        !!  70 #       $(Q)ln $@ :<
 75 #                                                  71 #
 76 # If KBUILD_VERBOSE contains 1, the whole comm !!  72 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 77 # If KBUILD_VERBOSE contains 2, the reason for !!  73 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
                                                   >>  74 # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
 78 #                                                  75 #
 79 # To put more focus on warnings, be less verbo     76 # To put more focus on warnings, be less verbose as default
 80 # Use 'make V=1' to see the full commands          77 # Use 'make V=1' to see the full commands
 81                                                    78 
 82 ifeq ("$(origin V)", "command line")               79 ifeq ("$(origin V)", "command line")
 83   KBUILD_VERBOSE = $(V)                            80   KBUILD_VERBOSE = $(V)
 84 endif                                              81 endif
                                                   >>  82 ifndef KBUILD_VERBOSE
                                                   >>  83   KBUILD_VERBOSE = 0
                                                   >>  84 endif
 85                                                    85 
 86 quiet = quiet_                                 !!  86 ifeq ($(KBUILD_VERBOSE),1)
 87 Q = @                                          << 
 88                                                << 
 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)    << 
 90   quiet =                                          87   quiet =
 91   Q =                                              88   Q =
                                                   >>  89 else
                                                   >>  90   quiet=quiet_
                                                   >>  91   Q = @
 92 endif                                              92 endif
 93                                                    93 
 94 # If the user is running make -s (silent mode)     94 # If the user is running make -s (silent mode), suppress echoing of
 95 # commands                                         95 # commands
 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !!  96 
 97 quiet=silent_                                  !!  97 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
 98 override KBUILD_VERBOSE :=                     !!  98   quiet=silent_
                                                   >>  99   KBUILD_VERBOSE = 0
 99 endif                                             100 endif
100                                                   101 
101 export quiet Q KBUILD_VERBOSE                     102 export quiet Q KBUILD_VERBOSE
102                                                   103 
103 # Call a source code checker (by default, "spa    104 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation.                                  105 # C compilation.
105 #                                                 106 #
106 # Use 'make C=1' to enable checking of only re    107 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s    108 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not.         109 # of whether they are re-compiled or not.
109 #                                                 110 #
110 # See the file "Documentation/dev-tools/sparse    111 # See the file "Documentation/dev-tools/sparse.rst" for more details,
111 # including where to get the "sparse" utility.    112 # including where to get the "sparse" utility.
112                                                   113 
113 ifeq ("$(origin C)", "command line")              114 ifeq ("$(origin C)", "command line")
114   KBUILD_CHECKSRC = $(C)                          115   KBUILD_CHECKSRC = $(C)
115 endif                                             116 endif
116 ifndef KBUILD_CHECKSRC                            117 ifndef KBUILD_CHECKSRC
117   KBUILD_CHECKSRC = 0                             118   KBUILD_CHECKSRC = 0
118 endif                                             119 endif
119                                                   120 
120 export KBUILD_CHECKSRC                            121 export KBUILD_CHECKSRC
121                                                   122 
122 # Enable "clippy" (a linter) as part of the Ru << 
123 #                                              << 
124 # Use 'make CLIPPY=1' to enable it.            << 
125 ifeq ("$(origin CLIPPY)", "command line")      << 
126   KBUILD_CLIPPY := $(CLIPPY)                   << 
127 endif                                          << 
128                                                << 
129 export KBUILD_CLIPPY                           << 
130                                                << 
131 # Use make M=dir or set the environment variab    123 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
132 # directory of external module to build. Setti    124 # directory of external module to build. Setting M= takes precedence.
133 ifeq ("$(origin M)", "command line")              125 ifeq ("$(origin M)", "command line")
134   KBUILD_EXTMOD := $(M)                           126   KBUILD_EXTMOD := $(M)
135 endif                                             127 endif
136                                                   128 
137 $(if $(word 2, $(KBUILD_EXTMOD)), \               129 $(if $(word 2, $(KBUILD_EXTMOD)), \
138         $(error building multiple external mod    130         $(error building multiple external modules is not supported))
139                                                   131 
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI << 
141         $(error module directory path cannot c << 
142                                                << 
143 # Remove trailing slashes                         132 # Remove trailing slashes
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)           133 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM    134 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
146 endif                                             135 endif
147                                                   136 
148 export KBUILD_EXTMOD                              137 export KBUILD_EXTMOD
149                                                   138 
150 # backward compatibility                       << 
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC << 
152                                                << 
153 ifeq ("$(origin W)", "command line")           << 
154   KBUILD_EXTRA_WARN := $(W)                    << 
155 endif                                          << 
156                                                << 
157 export KBUILD_EXTRA_WARN                       << 
158                                                << 
159 # Kbuild will save output files in the current    139 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t    140 # This does not need to match to the root of the kernel source tree.
161 #                                                 141 #
162 # For example, you can do this:                   142 # For example, you can do this:
163 #                                                 143 #
164 #  cd /dir/to/store/output/files; make -f /dir    144 #  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 #                                                 145 #
166 # If you want to save output files in a differ    146 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it.                     147 # two syntaxes to specify it.
168 #                                                 148 #
169 # 1) O=                                           149 # 1) O=
170 # Use "make O=dir/to/store/output/files/"         150 # Use "make O=dir/to/store/output/files/"
171 #                                                 151 #
172 # 2) Set KBUILD_OUTPUT                            152 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t    153 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil    154 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 #                                                 155 #
176 # The O= assignment takes precedence over the     156 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable.                                       157 # variable.
178                                                   158 
179 # Do we want to change the working directory?     159 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line")              160 ifeq ("$(origin O)", "command line")
181   KBUILD_OUTPUT := $(O)                           161   KBUILD_OUTPUT := $(O)
182 endif                                             162 endif
183                                                   163 
184 ifneq ($(KBUILD_OUTPUT),)                         164 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does  !! 165 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")           !! 166 # expand a shell special character '~'. We use a somewhat tedious way here.
                                                   >> 167 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
                                                   >> 168 $(if $(abs_objtree),, \
                                                   >> 169      $(error failed to create output directory "$(KBUILD_OUTPUT)"))
                                                   >> 170 
187 # $(realpath ...) resolves symlinks               171 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))    !! 172 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create  !! 173 else
                                                   >> 174 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),)                 175 endif # ifneq ($(KBUILD_OUTPUT),)
191                                                   176 
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 177 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 178 # Suppress "Entering directory ..." unless we are changing the work directory.
                                                   >> 179 MAKEFLAGS += --no-print-directory
                                                   >> 180 else
                                                   >> 181 need-sub-make := 1
194 endif                                             182 endif
195                                                   183 
196 export sub_make_done := 1                      !! 184 this-makefile := $(lastword $(MAKEFILE_LIST))
                                                   >> 185 abs_srctree := $(realpath $(dir $(this-makefile)))
197                                                   186 
198 endif # sub_make_done                          !! 187 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
                                                   >> 188 $(error source directory cannot contain spaces or colons)
                                                   >> 189 endif
199                                                   190 
200 ifeq ($(abs_objtree),$(CURDIR))                !! 191 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are  !! 192 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory     !! 193 #
203 else                                           !! 194 # This does not become effective immediately because MAKEFLAGS is re-parsed
204 # Recursion to show "Entering directory ..."   !! 195 # once after the Makefile is read. We need to invoke sub-make.
                                                   >> 196 MAKEFLAGS += --include-dir=$(abs_srctree)
205 need-sub-make := 1                                197 need-sub-make := 1
206 endif                                             198 endif
207                                                   199 
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 200 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 201 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 202 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
211 # behavior change in GNU Make 4.4.1.           << 
212 need-sub-make := 1                                203 need-sub-make := 1
                                                   >> 204 # Cancel implicit rules for this Makefile.
                                                   >> 205 $(this-makefile): ;
213 endif                                             206 endif
214                                                   207 
                                                   >> 208 export abs_srctree abs_objtree
                                                   >> 209 export sub_make_done := 1
                                                   >> 210 
215 ifeq ($(need-sub-make),1)                         211 ifeq ($(need-sub-make),1)
216                                                   212 
217 PHONY += $(MAKECMDGOALS) __sub-make               213 PHONY += $(MAKECMDGOALS) __sub-make
218                                                   214 
219 $(filter-out $(this-makefile), $(MAKECMDGOALS)    215 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
220         @:                                        216         @:
221                                                   217 
222 # Invoke a second make in the output directory    218 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make:                                       219 __sub-make:
224         $(Q)$(MAKE) $(no-print-directory) -C $ !! 220         $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225         -f $(abs_srctree)/Makefile $(MAKECMDGO << 
226                                                   221 
227 else # need-sub-make                           !! 222 endif # need-sub-make
                                                   >> 223 endif # sub_make_done
228                                                   224 
229 # We process the rest of the Makefile if this     225 # We process the rest of the Makefile if this is the final invocation of make
                                                   >> 226 ifeq ($(need-sub-make),)
                                                   >> 227 
                                                   >> 228 # Do not print "Entering directory ...",
                                                   >> 229 # but we want to display it when entering to the output directory
                                                   >> 230 # so that IDEs/editors are able to understand relative filenames.
                                                   >> 231 MAKEFLAGS += --no-print-directory
230                                                   232 
231 ifeq ($(abs_srctree),$(abs_objtree))              233 ifeq ($(abs_srctree),$(abs_objtree))
232         # building in the source tree             234         # building in the source tree
233         srctree := .                              235         srctree := .
234         building_out_of_srctree :=                236         building_out_of_srctree :=
235 else                                              237 else
236         ifeq ($(abs_srctree)/,$(dir $(abs_objt    238         ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237                 # building in a subdirectory o    239                 # building in a subdirectory of the source tree
238                 srctree := ..                     240                 srctree := ..
239         else                                      241         else
240                 srctree := $(abs_srctree)         242                 srctree := $(abs_srctree)
241         endif                                     243         endif
242         building_out_of_srctree := 1              244         building_out_of_srctree := 1
243 endif                                             245 endif
244                                                   246 
245 ifneq ($(KBUILD_ABS_SRCTREE),)                    247 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree)                         248 srctree := $(abs_srctree)
247 endif                                             249 endif
248                                                   250 
249 objtree         := .                              251 objtree         := .
250                                                << 
251 VPATH           :=                             << 
252                                                << 
253 ifeq ($(KBUILD_EXTMOD),)                       << 
254 ifdef building_out_of_srctree                  << 
255 VPATH           := $(srctree)                     252 VPATH           := $(srctree)
256 endif                                          << 
257 endif                                          << 
258                                                   253 
259 export building_out_of_srctree srctree objtree    254 export building_out_of_srctree srctree objtree VPATH
260                                                   255 
261 # To make sure we do not include .config for a    256 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri    257 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c    258 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets.       259 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'.               260 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and     261 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c    262 # of make so .config is not included in this case either (for *config).
268                                                   263 
269 version_h := include/generated/uapi/linux/vers    264 version_h := include/generated/uapi/linux/version.h
270                                                   265 
271 clean-targets := %clean mrproper cleandocs        266 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \       267 no-dot-config-targets := $(clean-targets) \
273                          cscope gtags TAGS tag    268                          cscope gtags TAGS tags help% %docs check% coccicheck \
274                          $(version_h) headers     269                          $(version_h) headers headers_% archheaders archscripts \
275                          %asm-generic kernelve    270                          %asm-generic kernelversion %src-pkg dt_binding_check \
276                          outputmakefile rustav !! 271                          outputmakefile
277 no-sync-config-targets := $(no-dot-config-targ !! 272 # Installation targets should not require compiler. Unfortunately, vdso_install
                                                   >> 273 # is an exception where build artifacts may be updated. This must be fixed.
                                                   >> 274 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
                                                   >> 275                         headers_install modules_install kernelrelease image_name
                                                   >> 276 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
278                           image_name              277                           image_name
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls !! 278 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
280                                                   279 
281 config-build    :=                                280 config-build    :=
282 mixed-build     :=                                281 mixed-build     :=
283 need-config     := 1                              282 need-config     := 1
                                                   >> 283 need-compiler   := 1
284 may-sync-config := 1                              284 may-sync-config := 1
285 single-build    :=                                285 single-build    :=
286                                                   286 
287 ifneq ($(filter $(no-dot-config-targets), $(MA    287 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288     ifeq ($(filter-out $(no-dot-config-targets !! 288         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289         need-config :=                         !! 289                 need-config :=
290     endif                                      !! 290         endif
291 endif                                             291 endif
292                                                   292 
293 ifneq ($(filter $(no-sync-config-targets), $(M !! 293 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
294     ifeq ($(filter-out $(no-sync-config-target !! 294         ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
295         may-sync-config :=                     !! 295                 need-compiler :=
296     endif                                      !! 296         endif
297 endif                                             297 endif
298                                                   298 
299 need-compiler := $(may-sync-config)            !! 299 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
                                                   >> 300         ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
                                                   >> 301                 may-sync-config :=
                                                   >> 302         endif
                                                   >> 303 endif
300                                                   304 
301 ifneq ($(KBUILD_EXTMOD),)                         305 ifneq ($(KBUILD_EXTMOD),)
302     may-sync-config :=                         !! 306         may-sync-config :=
303 endif                                             307 endif
304                                                   308 
305 ifeq ($(KBUILD_EXTMOD),)                          309 ifeq ($(KBUILD_EXTMOD),)
306     ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 310         ifneq ($(filter %config,$(MAKECMDGOALS)),)
307         config-build := 1                      !! 311                 config-build := 1
308         ifneq ($(words $(MAKECMDGOALS)),1)     !! 312                 ifneq ($(words $(MAKECMDGOALS)),1)
309             mixed-build := 1                   !! 313                         mixed-build := 1
                                                   >> 314                 endif
310         endif                                     315         endif
311     endif                                      << 
312 endif                                             316 endif
313                                                   317 
314 # We cannot build single targets and the other    318 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO    319 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316     single-build := 1                          !! 320         single-build := 1
317     ifneq ($(filter-out $(single-targets), $(M !! 321         ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318         mixed-build := 1                       !! 322                 mixed-build := 1
319     endif                                      !! 323         endif
320 endif                                             324 endif
321                                                   325 
322 # For "make -j clean all", "make -j mrproper d    326 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL    327 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324     ifneq ($(filter-out $(clean-targets),$(MAK !! 328         ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325         mixed-build := 1                       !! 329                 mixed-build := 1
326     endif                                      !! 330         endif
327 endif                                             331 endif
328                                                   332 
329 # install and modules_install need also be pro    333 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),)        334 ifneq ($(filter install,$(MAKECMDGOALS)),)
331     ifneq ($(filter modules_install,$(MAKECMDG !! 335         ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332         mixed-build := 1                       !! 336                 mixed-build := 1
333     endif                                      !! 337         endif
334 endif                                             338 endif
335                                                   339 
336 ifdef mixed-build                                 340 ifdef mixed-build
337 # ============================================    341 # ===========================================================================
338 # We're called with mixed targets (*config and    342 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one.                         343 # Handle them one by one.
340                                                   344 
341 PHONY += $(MAKECMDGOALS) __build_one_by_one       345 PHONY += $(MAKECMDGOALS) __build_one_by_one
342                                                   346 
343 $(MAKECMDGOALS): __build_one_by_one               347 $(MAKECMDGOALS): __build_one_by_one
344         @:                                        348         @:
345                                                   349 
346 __build_one_by_one:                               350 __build_one_by_one:
347         $(Q)set -e; \                             351         $(Q)set -e; \
348         for i in $(MAKECMDGOALS); do \            352         for i in $(MAKECMDGOALS); do \
349                 $(MAKE) -f $(srctree)/Makefile    353                 $(MAKE) -f $(srctree)/Makefile $$i; \
350         done                                      354         done
351                                                   355 
352 else # !mixed-build                               356 else # !mixed-build
353                                                   357 
354 include $(srctree)/scripts/Kbuild.include         358 include $(srctree)/scripts/Kbuild.include
355                                                   359 
356 # Read KERNELRELEASE from include/config/kerne    360 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 361 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.    362 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA    363 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360                                                   364 
361 include $(srctree)/scripts/subarch.include        365 include $(srctree)/scripts/subarch.include
362                                                   366 
363 # Cross compiling and selecting different set     367 # Cross compiling and selecting different set of gcc/bin-utils
364 # --------------------------------------------    368 # ---------------------------------------------------------------------------
365 #                                                 369 #
366 # When performing cross compilation for other     370 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for     371 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make:      372 # ARCH can be set during invocation of make:
369 # make ARCH=arm64                              !! 373 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir    374 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e    375 # The default ARCH is the host where make is executed.
372                                                   376 
373 # CROSS_COMPILE specify the prefix used for al    377 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin    378 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE).             379 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line    380 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu-        !! 381 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th    382 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr    383 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL    384 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH            ?= $(SUBARCH)                     385 ARCH            ?= $(SUBARCH)
382                                                   386 
383 # Architecture as present in compile.h            387 # Architecture as present in compile.h
384 UTS_MACHINE     := $(ARCH)                        388 UTS_MACHINE     := $(ARCH)
385 SRCARCH         := $(ARCH)                        389 SRCARCH         := $(ARCH)
386                                                   390 
387 # Additional ARCH settings for x86                391 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386)                               392 ifeq ($(ARCH),i386)
389         SRCARCH := x86                            393         SRCARCH := x86
390 endif                                             394 endif
391 ifeq ($(ARCH),x86_64)                             395 ifeq ($(ARCH),x86_64)
392         SRCARCH := x86                            396         SRCARCH := x86
393 endif                                             397 endif
394                                                   398 
395 # Additional ARCH settings for sparc              399 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32)                            400 ifeq ($(ARCH),sparc32)
397        SRCARCH := sparc                           401        SRCARCH := sparc
398 endif                                             402 endif
399 ifeq ($(ARCH),sparc64)                            403 ifeq ($(ARCH),sparc64)
400        SRCARCH := sparc                           404        SRCARCH := sparc
401 endif                                             405 endif
402                                                   406 
403 # Additional ARCH settings for parisc             407 # Additional ARCH settings for parisc
404 ifeq ($(ARCH),parisc64)                           408 ifeq ($(ARCH),parisc64)
405        SRCARCH := parisc                          409        SRCARCH := parisc
406 endif                                             410 endif
407                                                   411 
408 export cross_compiling :=                         412 export cross_compiling :=
409 ifneq ($(SRCARCH),$(SUBARCH))                     413 ifneq ($(SRCARCH),$(SUBARCH))
410 cross_compiling := 1                              414 cross_compiling := 1
411 endif                                             415 endif
412                                                   416 
413 KCONFIG_CONFIG  ?= .config                        417 KCONFIG_CONFIG  ?= .config
414 export KCONFIG_CONFIG                             418 export KCONFIG_CONFIG
415                                                   419 
416 # SHELL used by kbuild                            420 # SHELL used by kbuild
417 CONFIG_SHELL := sh                                421 CONFIG_SHELL := sh
418                                                   422 
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS     423 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG    424 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d    425 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422                                                   426 
423 ifneq ($(LLVM),)                                  427 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),)                  !! 428 HOSTCC  = clang
425 LLVM_PREFIX := $(LLVM)                         !! 429 HOSTCXX = clang++
426 else ifneq ($(filter -%,$(LLVM)),)             << 
427 LLVM_SUFFIX := $(LLVM)                         << 
428 endif                                          << 
429                                                << 
430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)    << 
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)  << 
432 else                                              430 else
433 HOSTCC  = gcc                                     431 HOSTCC  = gcc
434 HOSTCXX = g++                                     432 HOSTCXX = g++
435 endif                                             433 endif
436 HOSTRUSTC = rustc                              << 
437 HOSTPKG_CONFIG  = pkg-config                   << 
438                                                   434 
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 435 export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
440                          -O2 -fomit-frame-poin !! 436                               -O2 -fomit-frame-pointer -std=gnu89
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) !! 437 export KBUILD_USERLDFLAGS :=
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)           !! 438 
443                                                !! 439 KBUILD_HOSTCFLAGS   := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
444 # These flags apply to all Rust code in the tr !! 440 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
445 # host programs.                               << 
446 export rust_common_flags := --edition=2021 \   << 
447                             -Zbinary_dep_depin << 
448                             -Astable_features  << 
449                             -Dunsafe_op_in_uns << 
450                             -Dnon_ascii_idents << 
451                             -Wrust_2018_idioms << 
452                             -Wunreachable_pub  << 
453                             -Wmissing_docs \   << 
454                             -Wrustdoc::missing << 
455                             -Wclippy::all \    << 
456                             -Wclippy::mut_mut  << 
457                             -Wclippy::needless << 
458                             -Wclippy::needless << 
459                             -Wclippy::no_mangl << 
460                             -Wclippy::dbg_macr << 
461                                                << 
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS << 
463                        $(HOSTCFLAGS) -I $(srct << 
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 
465                        -I $(srctree)/scripts/i << 
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 
467                         -Zallow-features= $(HO << 
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H    441 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST    442 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470                                                   443 
471 # Make variables (CC, etc...)                     444 # Make variables (CC, etc...)
472 CPP             = $(CC) -E                        445 CPP             = $(CC) -E
473 ifneq ($(LLVM),)                                  446 ifneq ($(LLVM),)
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU !! 447 CC              = clang
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S !! 448 LD              = ld.lld
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_ !! 449 AR              = llvm-ar
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_ !! 450 NM              = llvm-nm
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$( !! 451 OBJCOPY         = llvm-objcopy
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$( !! 452 OBJDUMP         = llvm-objdump
480 READELF         = $(LLVM_PREFIX)llvm-readelf$( !! 453 READELF         = llvm-readelf
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL !! 454 STRIP           = llvm-strip
482 else                                              455 else
483 CC              = $(CROSS_COMPILE)gcc             456 CC              = $(CROSS_COMPILE)gcc
484 LD              = $(CROSS_COMPILE)ld              457 LD              = $(CROSS_COMPILE)ld
485 AR              = $(CROSS_COMPILE)ar              458 AR              = $(CROSS_COMPILE)ar
486 NM              = $(CROSS_COMPILE)nm              459 NM              = $(CROSS_COMPILE)nm
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         460 OBJCOPY         = $(CROSS_COMPILE)objcopy
488 OBJDUMP         = $(CROSS_COMPILE)objdump         461 OBJDUMP         = $(CROSS_COMPILE)objdump
489 READELF         = $(CROSS_COMPILE)readelf         462 READELF         = $(CROSS_COMPILE)readelf
490 STRIP           = $(CROSS_COMPILE)strip           463 STRIP           = $(CROSS_COMPILE)strip
491 endif                                             464 endif
492 RUSTC           = rustc                        << 
493 RUSTDOC         = rustdoc                      << 
494 RUSTFMT         = rustfmt                      << 
495 CLIPPY_DRIVER   = clippy-driver                << 
496 BINDGEN         = bindgen                      << 
497 PAHOLE          = pahole                          465 PAHOLE          = pahole
498 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve    466 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
499 LEX             = flex                            467 LEX             = flex
500 YACC            = bison                           468 YACC            = bison
501 AWK             = awk                             469 AWK             = awk
502 INSTALLKERNEL  := installkernel                   470 INSTALLKERNEL  := installkernel
                                                   >> 471 DEPMOD          = depmod
503 PERL            = perl                            472 PERL            = perl
504 PYTHON3         = python3                         473 PYTHON3         = python3
505 CHECK           = sparse                          474 CHECK           = sparse
506 BASH            = bash                            475 BASH            = bash
507 KGZIP           = gzip                            476 KGZIP           = gzip
508 KBZIP2          = bzip2                           477 KBZIP2          = bzip2
509 KLZOP           = lzop                            478 KLZOP           = lzop
510 LZMA            = lzma                            479 LZMA            = lzma
511 LZ4             = lz4c                            480 LZ4             = lz4c
512 XZ              = xz                              481 XZ              = xz
513 ZSTD            = zstd                            482 ZSTD            = zstd
514                                                   483 
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    484 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516                   -Wbitwise -Wno-return-void -    485                   -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS :=                                 486 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE   =                                 487 CFLAGS_MODULE   =
519 RUSTFLAGS_MODULE =                             << 
520 AFLAGS_MODULE   =                                 488 AFLAGS_MODULE   =
521 LDFLAGS_MODULE  =                                 489 LDFLAGS_MODULE  =
522 CFLAGS_KERNEL   =                                 490 CFLAGS_KERNEL   =
523 RUSTFLAGS_KERNEL =                             << 
524 AFLAGS_KERNEL   =                                 491 AFLAGS_KERNEL   =
525 LDFLAGS_vmlinux =                                 492 LDFLAGS_vmlinux =
526                                                   493 
527 # Use USERINCLUDE when you must reference the     494 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE    := \                               495 USERINCLUDE    := \
529                 -I$(srctree)/arch/$(SRCARCH)/i    496                 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530                 -I$(objtree)/arch/$(SRCARCH)/i    497                 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531                 -I$(srctree)/include/uapi \       498                 -I$(srctree)/include/uapi \
532                 -I$(objtree)/include/generated    499                 -I$(objtree)/include/generated/uapi \
533                 -include $(srctree)/include/li    500                 -include $(srctree)/include/linux/compiler-version.h \
534                 -include $(srctree)/include/li    501                 -include $(srctree)/include/linux/kconfig.h
535                                                   502 
536 # Use LINUXINCLUDE when you must reference the    503 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option      504 # Needed to be compatible with the O= option
538 LINUXINCLUDE    := \                              505 LINUXINCLUDE    := \
539                 -I$(srctree)/arch/$(SRCARCH)/i    506                 -I$(srctree)/arch/$(SRCARCH)/include \
540                 -I$(objtree)/arch/$(SRCARCH)/i    507                 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541                 $(if $(building_out_of_srctree    508                 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542                 -I$(objtree)/include \            509                 -I$(objtree)/include \
543                 $(USERINCLUDE)                    510                 $(USERINCLUDE)
544                                                   511 
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE        512 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
546                                                !! 513 KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS :=                               !! 514                    -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11                    !! 515                    -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar                 !! 516                    -Werror=return-type -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char               !! 517                    -std=gnu89
551 KBUILD_CFLAGS += -fno-common                   << 
552 KBUILD_CFLAGS += -fno-PIE                      << 
553 KBUILD_CFLAGS += -fno-strict-aliasing          << 
554                                                << 
555 KBUILD_CPPFLAGS := -D__KERNEL__                   518 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \     << 
557                     -Cpanic=abort -Cembed-bitc << 
558                     -Cforce-unwind-tables=n -C << 
559                     -Csymbol-mangling-version= << 
560                     -Crelocation-model=static  << 
561                     -Zfunction-sections=n \    << 
562                     -Wclippy::float_arithmetic << 
563                                                << 
564 KBUILD_AFLAGS_KERNEL :=                           519 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL :=                           520 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL :=                     << 
567 KBUILD_AFLAGS_MODULE  := -DMODULE                 521 KBUILD_AFLAGS_MODULE  := -DMODULE
568 KBUILD_CFLAGS_MODULE  := -DMODULE                 522 KBUILD_CFLAGS_MODULE  := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE        << 
570 KBUILD_LDFLAGS_MODULE :=                          523 KBUILD_LDFLAGS_MODULE :=
571 KBUILD_LDFLAGS :=                                 524 KBUILD_LDFLAGS :=
572 CLANG_FLAGS :=                                    525 CLANG_FLAGS :=
573                                                   526 
574 ifeq ($(KBUILD_CLIPPY),1)                      !! 527 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
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                                                << 
582 ifdef RUST_LIB_SRC                             << 
583         export RUST_LIB_SRC                    << 
584 endif                                          << 
585                                                << 
586 # Allows the usage of unstable features in sta << 
587 export RUSTC_BOOTSTRAP := 1                    << 
588                                                << 
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K << 
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q << 
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS          << 
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF    528 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_    529 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD        530 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS     531 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS    << 
597                                                   532 
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC    533 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU    534 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF << 
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    535 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 536 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 537 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
604                                                   538 
605 # Files to ignore in find ... statements          539 # Files to ignore in find ... statements
606                                                   540 
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na    541 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
608                           -name CVS -o -name .    542                           -name CVS -o -name .pc -o -name .hg -o -name .git \) \
609                           -prune -o               543                           -prune -o
                                                   >> 544 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
                                                   >> 545                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
610                                                   546 
611 # ============================================    547 # ===========================================================================
612 # Rules shared between *config targets and bui    548 # Rules shared between *config targets and build targets
613                                                   549 
614 # Basic helpers built in scripts/basic/           550 # Basic helpers built in scripts/basic/
615 PHONY += scripts_basic                            551 PHONY += scripts_basic
616 scripts_basic:                                    552 scripts_basic:
617         $(Q)$(MAKE) $(build)=scripts/basic        553         $(Q)$(MAKE) $(build)=scripts/basic
618                                                   554 
619 PHONY += outputmakefile                           555 PHONY += outputmakefile
620 ifdef building_out_of_srctree                     556 ifdef building_out_of_srctree
621 # Before starting out-of-tree build, make sure    557 # Before starting out-of-tree build, make sure the source tree is clean.
622 # outputmakefile generates a Makefile in the o    558 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve    559 # separate output directory. This allows convenient use of make in the
624 # output directory.                               560 # output directory.
625 # At the same time when output Makefile genera    561 # At the same time when output Makefile generated, generate .gitignore to
626 # ignore whole output directory                   562 # ignore whole output directory
627                                                   563 
628 quiet_cmd_makefile = GEN     Makefile             564 quiet_cmd_makefile = GEN     Makefile
629       cmd_makefile = { \                          565       cmd_makefile = { \
630         echo "\# Automatically generated by $(    566         echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
631         echo "include $(srctree)/Makefile"; \     567         echo "include $(srctree)/Makefile"; \
632         } > Makefile                              568         } > Makefile
633                                                   569 
634 outputmakefile:                                   570 outputmakefile:
635         @if [ -f $(srctree)/.config -o \       !! 571         $(Q)if [ -f $(srctree)/.config -o \
636                  -d $(srctree)/include/config     572                  -d $(srctree)/include/config -o \
637                  -d $(srctree)/arch/$(SRCARCH)    573                  -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
638                 echo >&2 "***"; \                 574                 echo >&2 "***"; \
639                 echo >&2 "*** The source tree     575                 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
640                 echo >&2 "*** in $(abs_srctree    576                 echo >&2 "*** in $(abs_srctree)";\
641                 echo >&2 "***"; \                 577                 echo >&2 "***"; \
642                 false; \                          578                 false; \
643         fi                                        579         fi
644         $(Q)ln -fsn $(srctree) source             580         $(Q)ln -fsn $(srctree) source
645         $(call cmd,makefile)                      581         $(call cmd,makefile)
646         $(Q)test -e .gitignore || \               582         $(Q)test -e .gitignore || \
647         { echo "# this is build directory, ign    583         { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
648 endif                                             584 endif
649                                                   585 
650 # The expansion should be delayed until arch/$    586 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
651 # Some architectures define CROSS_COMPILE in a    587 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
652 # CC_VERSION_TEXT is referenced from Kconfig (    588 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
653 # and from include/config/auto.conf.cmd to det    589 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 590 CC_VERSION_TEXT = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1))
655                                                   591 
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),    592 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
657 include $(srctree)/scripts/Makefile.clang      !! 593 ifneq ($(CROSS_COMPILE),)
                                                   >> 594 CLANG_FLAGS     += --target=$(notdir $(CROSS_COMPILE:%-=%))
                                                   >> 595 endif
                                                   >> 596 ifeq ($(LLVM_IAS),1)
                                                   >> 597 CLANG_FLAGS     += -integrated-as
                                                   >> 598 else
                                                   >> 599 CLANG_FLAGS     += -no-integrated-as
                                                   >> 600 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
                                                   >> 601 CLANG_FLAGS     += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
                                                   >> 602 endif
                                                   >> 603 CLANG_FLAGS     += -Werror=unknown-warning-option
                                                   >> 604 KBUILD_CFLAGS   += $(CLANG_FLAGS)
                                                   >> 605 KBUILD_AFLAGS   += $(CLANG_FLAGS)
                                                   >> 606 export CLANG_FLAGS
658 endif                                             607 endif
659                                                   608 
660 # Include this also for config targets because    609 # Include this also for config targets because some architectures need
661 # cc-cross-prefix to determine CROSS_COMPILE.     610 # cc-cross-prefix to determine CROSS_COMPILE.
662 ifdef need-compiler                               611 ifdef need-compiler
663 include $(srctree)/scripts/Makefile.compiler      612 include $(srctree)/scripts/Makefile.compiler
664 endif                                             613 endif
665                                                   614 
666 ifdef config-build                                615 ifdef config-build
667 # ============================================    616 # ===========================================================================
668 # *config targets only - make sure prerequisit    617 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe    618 # in scripts/kconfig to make the *config target
670                                                   619 
671 # Read arch-specific Makefile to set KBUILD_DE !! 620 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ    621 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig'                       622 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile       623 include $(srctree)/arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS    624 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
676                                                   625 
677 config: outputmakefile scripts_basic FORCE        626 config: outputmakefile scripts_basic FORCE
678         $(Q)$(MAKE) $(build)=scripts/kconfig $    627         $(Q)$(MAKE) $(build)=scripts/kconfig $@
679                                                   628 
680 %config: outputmakefile scripts_basic FORCE       629 %config: outputmakefile scripts_basic FORCE
681         $(Q)$(MAKE) $(build)=scripts/kconfig $    630         $(Q)$(MAKE) $(build)=scripts/kconfig $@
682                                                   631 
683 else #!config-build                               632 else #!config-build
684 # ============================================    633 # ===========================================================================
685 # Build targets only - this includes vmlinux,  !! 634 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e    635 # targets and others. In general all targets except *config targets.
687                                                   636 
688 # If building an external module we do not car    637 # If building an external module we do not care about the all: rule
689 # but instead __all depend on modules             638 # but instead __all depend on modules
690 PHONY += all                                      639 PHONY += all
691 ifeq ($(KBUILD_EXTMOD),)                          640 ifeq ($(KBUILD_EXTMOD),)
692 __all: all                                        641 __all: all
693 else                                              642 else
694 __all: modules                                    643 __all: modules
695 endif                                             644 endif
696                                                   645 
697 targets :=                                     << 
698                                                << 
699 # Decide whether to build built-in, modular, o    646 # Decide whether to build built-in, modular, or both.
700 # Normally, just do built-in.                     647 # Normally, just do built-in.
701                                                   648 
702 KBUILD_MODULES :=                                 649 KBUILD_MODULES :=
703 KBUILD_BUILTIN := 1                               650 KBUILD_BUILTIN := 1
704                                                   651 
705 # If we have only "make modules", don't compil    652 # If we have only "make modules", don't compile built-in objects.
706 ifeq ($(MAKECMDGOALS),modules)                    653 ifeq ($(MAKECMDGOALS),modules)
707   KBUILD_BUILTIN :=                               654   KBUILD_BUILTIN :=
708 endif                                             655 endif
709                                                   656 
710 # If we have "make <whatever> modules", compil    657 # If we have "make <whatever> modules", compile modules
711 # in addition to whatever we do anyway.           658 # in addition to whatever we do anyway.
712 # Just "make" or "make all" shall build module    659 # Just "make" or "make all" shall build modules as well
713                                                   660 
714 ifneq ($(filter all modules nsdeps %compile_co    661 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
715   KBUILD_MODULES := 1                             662   KBUILD_MODULES := 1
716 endif                                             663 endif
717                                                   664 
718 ifeq ($(MAKECMDGOALS),)                           665 ifeq ($(MAKECMDGOALS),)
719   KBUILD_MODULES := 1                             666   KBUILD_MODULES := 1
720 endif                                             667 endif
721                                                   668 
722 export KBUILD_MODULES KBUILD_BUILTIN              669 export KBUILD_MODULES KBUILD_BUILTIN
723                                                   670 
724 ifdef need-config                                 671 ifdef need-config
725 include include/config/auto.conf                  672 include include/config/auto.conf
726 endif                                             673 endif
727                                                   674 
728 ifeq ($(KBUILD_EXTMOD),)                          675 ifeq ($(KBUILD_EXTMOD),)
729 # Objects we will link into vmlinux / subdirs     676 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y          :=                             !! 677 core-y          := init/ usr/ arch/$(SRCARCH)/
731 drivers-y       :=                             !! 678 drivers-y       := drivers/ sound/
                                                   >> 679 drivers-$(CONFIG_SAMPLES) += samples/
                                                   >> 680 drivers-$(CONFIG_NET) += net/
                                                   >> 681 drivers-y       += virt/
732 libs-y          := lib/                           682 libs-y          := lib/
733 endif # KBUILD_EXTMOD                             683 endif # KBUILD_EXTMOD
734                                                   684 
735 # The all: target is the default when no targe    685 # The all: target is the default when no target is given on the
736 # command line.                                   686 # command line.
737 # This allow a user to issue only 'make' to bu    687 # This allow a user to issue only 'make' to build a kernel including modules
738 # Defaults to vmlinux, but the arch makefile u    688 # Defaults to vmlinux, but the arch makefile usually adds further targets
739 all: vmlinux                                      689 all: vmlinux
740                                                   690 
741 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover !! 691 CFLAGS_GCOV     := -fprofile-arcs -ftest-coverage \
742 ifdef CONFIG_CC_IS_GCC                         !! 692         $(call cc-option,-fno-tree-loop-im) \
743 CFLAGS_GCOV     += -fno-tree-loop-im           !! 693         $(call cc-disable-warning,maybe-uninitialized,)
744 endif                                          << 
745 export CFLAGS_GCOV                                694 export CFLAGS_GCOV
746                                                   695 
747 # The arch Makefiles can override CC_FLAGS_FTR    696 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
748 ifdef CONFIG_FUNCTION_TRACER                      697 ifdef CONFIG_FUNCTION_TRACER
749   CC_FLAGS_FTRACE := -pg                          698   CC_FLAGS_FTRACE := -pg
750 endif                                             699 endif
751                                                   700 
                                                   >> 701 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
                                                   >> 702 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
                                                   >> 703 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
                                                   >> 704 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
                                                   >> 705 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
                                                   >> 706 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
                                                   >> 707 export RETPOLINE_CFLAGS
                                                   >> 708 export RETPOLINE_VDSO_CFLAGS
                                                   >> 709 
752 include $(srctree)/arch/$(SRCARCH)/Makefile       710 include $(srctree)/arch/$(SRCARCH)/Makefile
753                                                   711 
754 ifdef need-config                                 712 ifdef need-config
755 ifdef may-sync-config                             713 ifdef may-sync-config
756 # Read in dependencies to all Kconfig* files,     714 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
757 # changes are detected. This should be include    715 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
758 # because some architectures define CROSS_COMP    716 # because some architectures define CROSS_COMPILE there.
759 include include/config/auto.conf.cmd              717 include include/config/auto.conf.cmd
760                                                   718 
761 $(KCONFIG_CONFIG):                                719 $(KCONFIG_CONFIG):
762         @echo >&2 '***'                           720         @echo >&2 '***'
763         @echo >&2 '*** Configuration file "$@"    721         @echo >&2 '*** Configuration file "$@" not found!'
764         @echo >&2 '***'                           722         @echo >&2 '***'
765         @echo >&2 '*** Please run some configu    723         @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
766         @echo >&2 '*** "make menuconfig" or "m    724         @echo >&2 '*** "make menuconfig" or "make xconfig").'
767         @echo >&2 '***'                           725         @echo >&2 '***'
768         @/bin/false                               726         @/bin/false
769                                                   727 
770 # The actual configuration files used during t    728 # The actual configuration files used during the build are stored in
771 # include/generated/ and include/config/. Upda    729 # include/generated/ and include/config/. Update them if .config is newer than
772 # include/config/auto.conf (which mirrors .con    730 # include/config/auto.conf (which mirrors .config).
773 #                                                 731 #
774 # This exploits the 'multi-target pattern rule    732 # This exploits the 'multi-target pattern rule' trick.
775 # The syncconfig should be executed only once     733 # The syncconfig should be executed only once to make all the targets.
776 # (Note: use the grouped target '&:' when we b    734 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
777 #                                                 735 #
778 # Do not use $(call cmd,...) here. That would     736 # Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
779 # so you cannot notice that Kconfig is waiting    737 # so you cannot notice that Kconfig is waiting for the user input.
780 %/config/auto.conf %/config/auto.conf.cmd %/ge !! 738 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
781         $(Q)$(kecho) "  SYNC    $@"               739         $(Q)$(kecho) "  SYNC    $@"
782         $(Q)$(MAKE) -f $(srctree)/Makefile syn    740         $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
783 else # !may-sync-config                           741 else # !may-sync-config
784 # External modules and some install targets ne    742 # External modules and some install targets need include/generated/autoconf.h
785 # and include/config/auto.conf but do not care    743 # and include/config/auto.conf but do not care if they are up-to-date.
786 # Use auto.conf to trigger the test               744 # Use auto.conf to trigger the test
787 PHONY += include/config/auto.conf                 745 PHONY += include/config/auto.conf
788                                                   746 
789 include/config/auto.conf:                         747 include/config/auto.conf:
790         @test -e include/generated/autoconf.h  !! 748         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
791         echo >&2;                                 749         echo >&2;                                                       \
792         echo >&2 "  ERROR: Kernel configuratio    750         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
793         echo >&2 "         include/generated/a    751         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
794         echo >&2 "         Run 'make oldconfig    752         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
795         echo >&2 ;                                753         echo >&2 ;                                                      \
796         /bin/false)                               754         /bin/false)
797                                                   755 
798 endif # may-sync-config                           756 endif # may-sync-config
799 endif # need-config                               757 endif # need-config
800                                                   758 
801 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch !! 759 KBUILD_CFLAGS   += $(call cc-option,-fno-delete-null-pointer-checks,)
                                                   >> 760 KBUILD_CFLAGS   += $(call cc-disable-warning,frame-address,)
                                                   >> 761 KBUILD_CFLAGS   += $(call cc-disable-warning, format-truncation)
                                                   >> 762 KBUILD_CFLAGS   += $(call cc-disable-warning, format-overflow)
                                                   >> 763 KBUILD_CFLAGS   += $(call cc-disable-warning, address-of-packed-member)
802                                                   764 
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE          765 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
804 KBUILD_CFLAGS += -O2                              766 KBUILD_CFLAGS += -O2
805 KBUILD_RUSTFLAGS += -Copt-level=2              !! 767 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
                                                   >> 768 KBUILD_CFLAGS += -O3
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE            769 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
807 KBUILD_CFLAGS += -Os                              770 KBUILD_CFLAGS += -Os
808 KBUILD_RUSTFLAGS += -Copt-level=s              << 
809 endif                                             771 endif
810                                                   772 
811 # Always set `debug-assertions` and `overflow- << 
812 # depends on `opt-level` and `debug-assertions << 
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( << 
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 
815                                                << 
816 # Tell gcc to never replace conditional load w    773 # Tell gcc to never replace conditional load with a non-conditional one
817 ifdef CONFIG_CC_IS_GCC                         << 
818 # gcc-10 renamed --param=allow-store-data-race << 
819 # -fno-allow-store-data-races.                 << 
820 KBUILD_CFLAGS   += $(call cc-option,--param=al    774 KBUILD_CFLAGS   += $(call cc-option,--param=allow-store-data-races=0)
821 KBUILD_CFLAGS   += $(call cc-option,-fno-allow    775 KBUILD_CFLAGS   += $(call cc-option,-fno-allow-store-data-races)
822 endif                                          << 
823                                                   776 
824 ifdef CONFIG_READABLE_ASM                         777 ifdef CONFIG_READABLE_ASM
825 # Disable optimizations that make assembler li    778 # Disable optimizations that make assembler listings hard to read.
826 # reorder blocks reorders the control in the f    779 # reorder blocks reorders the control in the function
827 # ipa clone creates specialized cloned functio    780 # ipa clone creates specialized cloned functions
828 # partial inlining inlines only parts of funct    781 # partial inlining inlines only parts of functions
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 782 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
                                                   >> 783                  $(call cc-option,-fno-ipa-cp-clone,) \
                                                   >> 784                  $(call cc-option,-fno-partial-inlining)
                                                   >> 785 endif
                                                   >> 786 
                                                   >> 787 ifneq ($(CONFIG_FRAME_WARN),0)
                                                   >> 788 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
830 endif                                             789 endif
831                                                   790 
832 stackp-flags-y                                    791 stackp-flags-y                                    := -fno-stack-protector
833 stackp-flags-$(CONFIG_STACKPROTECTOR)             792 stackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      793 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
835                                                   794 
836 KBUILD_CFLAGS += $(stackp-flags-y)                795 KBUILD_CFLAGS += $(stackp-flags-y)
837                                                   796 
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 797 ifdef CONFIG_CC_IS_CLANG
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)      !! 798 KBUILD_CPPFLAGS += -Qunused-arguments
                                                   >> 799 KBUILD_CFLAGS += -Wno-format-invalid-specifier
                                                   >> 800 KBUILD_CFLAGS += -Wno-gnu
                                                   >> 801 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
                                                   >> 802 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
                                                   >> 803 # See modpost pattern 2
                                                   >> 804 KBUILD_CFLAGS += -mno-global-merge
                                                   >> 805 else
                                                   >> 806 
                                                   >> 807 # Warn about unmarked fall-throughs in switch statement.
                                                   >> 808 # Disabled for clang while comment to attribute conversion happens and
                                                   >> 809 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
                                                   >> 810 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,)
                                                   >> 811 # gcc inanely warns about local variables called 'main'
                                                   >> 812 KBUILD_CFLAGS += -Wno-main
                                                   >> 813 endif
                                                   >> 814 
                                                   >> 815 # These warnings generated too much noise in a regular build.
                                                   >> 816 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
                                                   >> 817 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
840                                                   818 
                                                   >> 819 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
841 ifdef CONFIG_FRAME_POINTER                        820 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    821 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y   << 
844 else                                              822 else
845 # Some targets (ARM with Thumb2, for example),    823 # Some targets (ARM with Thumb2, for example), can't be built with frame
846 # pointers.  For those, we don't have FUNCTION    824 # pointers.  For those, we don't have FUNCTION_TRACER automatically
847 # select FRAME_POINTER.  However, FUNCTION_TRA    825 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
848 # incompatible with -fomit-frame-pointer with     826 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
849 # -fomit-frame-pointer with FUNCTION_TRACER.      827 # -fomit-frame-pointer with FUNCTION_TRACER.
850 # In the Rust target specification, "frame-poi << 
851 # to "may-omit".                               << 
852 ifndef CONFIG_FUNCTION_TRACER                     828 ifndef CONFIG_FUNCTION_TRACER
853 KBUILD_CFLAGS   += -fomit-frame-pointer           829 KBUILD_CFLAGS   += -fomit-frame-pointer
854 endif                                             830 endif
855 endif                                             831 endif
856                                                   832 
857 # Initialize all stack variables with a 0xAA p    833 # Initialize all stack variables with a 0xAA pattern.
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN               834 ifdef CONFIG_INIT_STACK_ALL_PATTERN
859 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat    835 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pattern
860 endif                                             836 endif
861                                                   837 
862 # Initialize all stack variables with a zero v    838 # Initialize all stack variables with a zero value.
863 ifdef CONFIG_INIT_STACK_ALL_ZERO                  839 ifdef CONFIG_INIT_STACK_ALL_ZERO
                                                   >> 840 # Future support for zero initialization is still being debated, see
                                                   >> 841 # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
                                                   >> 842 # renamed or dropped.
864 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer    843 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zero
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 844 KBUILD_CFLAGS   += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
866 # https://github.com/llvm/llvm-project/issues/ << 
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi << 
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER           << 
869 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA << 
870 endif                                          << 
871 endif                                             845 endif
872                                                   846 
873 # While VLAs have been removed, GCC produces u    847 # While VLAs have been removed, GCC produces unreachable stack probes
874 # for the randomize_kstack_offset feature. Dis    848 # for the randomize_kstack_offset feature. Disable it for all compilers.
875 KBUILD_CFLAGS   += $(call cc-option, -fno-stac    849 KBUILD_CFLAGS   += $(call cc-option, -fno-stack-clash-protection)
876                                                   850 
877 # Clear used registers at func exit (to reduce !! 851 DEBUG_CFLAGS    :=
878 ifdef CONFIG_ZERO_CALL_USED_REGS               !! 852 
879 KBUILD_CFLAGS   += -fzero-call-used-regs=used- !! 853 # Workaround for GCC versions < 5.0
                                                   >> 854 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
                                                   >> 855 ifdef CONFIG_CC_IS_GCC
                                                   >> 856 DEBUG_CFLAGS    += $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
                                                   >> 857 endif
                                                   >> 858 
                                                   >> 859 ifdef CONFIG_DEBUG_INFO
                                                   >> 860 
                                                   >> 861 ifdef CONFIG_DEBUG_INFO_SPLIT
                                                   >> 862 DEBUG_CFLAGS    += -gsplit-dwarf
                                                   >> 863 else
                                                   >> 864 DEBUG_CFLAGS    += -g
                                                   >> 865 endif
                                                   >> 866 
                                                   >> 867 ifneq ($(LLVM_IAS),1)
                                                   >> 868 KBUILD_AFLAGS   += -Wa,-gdwarf-2
                                                   >> 869 endif
                                                   >> 870 
                                                   >> 871 ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
                                                   >> 872 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
                                                   >> 873 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
                                                   >> 874 DEBUG_CFLAGS    += -gdwarf-$(dwarf-version-y)
                                                   >> 875 endif
                                                   >> 876 
                                                   >> 877 ifdef CONFIG_DEBUG_INFO_REDUCED
                                                   >> 878 DEBUG_CFLAGS    += $(call cc-option, -femit-struct-debug-baseonly) \
                                                   >> 879                    $(call cc-option,-fno-var-tracking)
                                                   >> 880 endif
                                                   >> 881 
                                                   >> 882 ifdef CONFIG_DEBUG_INFO_COMPRESSED
                                                   >> 883 DEBUG_CFLAGS    += -gz=zlib
                                                   >> 884 KBUILD_AFLAGS   += -gz=zlib
                                                   >> 885 KBUILD_LDFLAGS  += --compress-debug-sections=zlib
880 endif                                             886 endif
881                                                   887 
                                                   >> 888 endif # CONFIG_DEBUG_INFO
                                                   >> 889 
                                                   >> 890 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
                                                   >> 891 export DEBUG_CFLAGS
                                                   >> 892 
882 ifdef CONFIG_FUNCTION_TRACER                      893 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC                 894 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
884   CC_FLAGS_FTRACE       += -mrecord-mcount        895   CC_FLAGS_FTRACE       += -mrecord-mcount
885   ifdef CONFIG_HAVE_NOP_MCOUNT                    896   ifdef CONFIG_HAVE_NOP_MCOUNT
886     ifeq ($(call cc-option-yn, -mnop-mcount),y    897     ifeq ($(call cc-option-yn, -mnop-mcount),y)
887       CC_FLAGS_FTRACE   += -mnop-mcount           898       CC_FLAGS_FTRACE   += -mnop-mcount
888       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU    899       CC_FLAGS_USING    += -DCC_USING_NOP_MCOUNT
889     endif                                         900     endif
890   endif                                           901   endif
891 endif                                             902 endif
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL            903 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
893   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT         !! 904   CC_FLAGS_USING        += -DCC_USING_NOP_MCOUNT
894     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU << 
895   endif                                        << 
896 endif                                             905 endif
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT       906 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
898   ifdef CONFIG_HAVE_C_RECORDMCOUNT                907   ifdef CONFIG_HAVE_C_RECORDMCOUNT
899     BUILD_C_RECORDMCOUNT := y                     908     BUILD_C_RECORDMCOUNT := y
900     export BUILD_C_RECORDMCOUNT                   909     export BUILD_C_RECORDMCOUNT
901   endif                                           910   endif
902 endif                                             911 endif
903 ifdef CONFIG_HAVE_FENTRY                          912 ifdef CONFIG_HAVE_FENTRY
904   # s390-linux-gnu-gcc did not support -mfentr << 
905   ifeq ($(call cc-option-yn, -mfentry),y)         913   ifeq ($(call cc-option-yn, -mfentry),y)
906     CC_FLAGS_FTRACE     += -mfentry               914     CC_FLAGS_FTRACE     += -mfentry
907     CC_FLAGS_USING      += -DCC_USING_FENTRY      915     CC_FLAGS_USING      += -DCC_USING_FENTRY
908   endif                                           916   endif
909 endif                                             917 endif
910 export CC_FLAGS_FTRACE                            918 export CC_FLAGS_FTRACE
911 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA    919 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
912 KBUILD_AFLAGS   += $(CC_FLAGS_USING)              920 KBUILD_AFLAGS   += $(CC_FLAGS_USING)
913 endif                                             921 endif
914                                                   922 
915 # We trigger additional mismatches with less i    923 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH               924 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 925 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif                                             926 endif
919                                                   927 
920 # `rustc`'s `-Zfunction-sections` applies to d << 
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION        928 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f    929 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections << 
924 LDFLAGS_vmlinux += --gc-sections                  930 LDFLAGS_vmlinux += --gc-sections
925 endif                                             931 endif
926                                                   932 
927 ifdef CONFIG_SHADOW_CALL_STACK                    933 ifdef CONFIG_SHADOW_CALL_STACK
928 ifndef CONFIG_DYNAMIC_SCS                      << 
929 CC_FLAGS_SCS    := -fsanitize=shadow-call-stac    934 CC_FLAGS_SCS    := -fsanitize=shadow-call-stack
930 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)                935 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)
931 endif                                          << 
932 export CC_FLAGS_SCS                               936 export CC_FLAGS_SCS
933 endif                                             937 endif
934                                                   938 
935 ifdef CONFIG_LTO_CLANG                            939 ifdef CONFIG_LTO_CLANG
936 ifdef CONFIG_LTO_CLANG_THIN                       940 ifdef CONFIG_LTO_CLANG_THIN
937 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit    941 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit
                                                   >> 942 KBUILD_LDFLAGS  += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
938 else                                              943 else
939 CC_FLAGS_LTO    := -flto                          944 CC_FLAGS_LTO    := -flto
940 endif                                             945 endif
941 CC_FLAGS_LTO    += -fvisibility=hidden            946 CC_FLAGS_LTO    += -fvisibility=hidden
942                                                   947 
943 # Limit inlining across translation units to r    948 # Limit inlining across translation units to reduce binary size
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5    949 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
                                                   >> 950 
                                                   >> 951 # Check for frame size exceeding threshold during prolog/epilog insertion
                                                   >> 952 # when using lld < 13.0.0.
                                                   >> 953 ifneq ($(CONFIG_FRAME_WARN),0)
                                                   >> 954 ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
                                                   >> 955 KBUILD_LDFLAGS  += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
                                                   >> 956 endif
                                                   >> 957 endif
945 endif                                             958 endif
946                                                   959 
947 ifdef CONFIG_LTO                                  960 ifdef CONFIG_LTO
948 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)       961 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)
949 KBUILD_AFLAGS   += -fno-lto                       962 KBUILD_AFLAGS   += -fno-lto
950 export CC_FLAGS_LTO                               963 export CC_FLAGS_LTO
951 endif                                             964 endif
952                                                   965 
953 ifdef CONFIG_CFI_CLANG                            966 ifdef CONFIG_CFI_CLANG
954 CC_FLAGS_CFI    := -fsanitize=kcfi             !! 967 CC_FLAGS_CFI    := -fsanitize=cfi \
                                                   >> 968                    -fsanitize-cfi-cross-dso \
                                                   >> 969                    -fno-sanitize-cfi-canonical-jump-tables \
                                                   >> 970                    -fno-sanitize-trap=cfi \
                                                   >> 971                    -fno-sanitize-blacklist
                                                   >> 972 
                                                   >> 973 ifdef CONFIG_CFI_PERMISSIVE
                                                   >> 974 CC_FLAGS_CFI    += -fsanitize-recover=cfi
                                                   >> 975 endif
                                                   >> 976 
                                                   >> 977 # If LTO flags are filtered out, we must also filter out CFI.
                                                   >> 978 CC_FLAGS_LTO    += $(CC_FLAGS_CFI)
955 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)                979 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)
956 export CC_FLAGS_CFI                               980 export CC_FLAGS_CFI
957 endif                                             981 endif
958                                                   982 
959 # Architectures can define flags to add/remove !! 983 ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
960 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UN !! 984 KBUILD_CFLAGS += -falign-functions=64
961 export CC_FLAGS_FPU                            << 
962 export CC_FLAGS_NO_FPU                         << 
963                                                << 
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)         << 
965 # Set the minimal function alignment. Use the  << 
966 # -fmin-function-alignment if it is available, << 
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME << 
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT     << 
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 
970 else                                           << 
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 
972 endif                                          << 
973 endif                                             985 endif
974                                                   986 
975 # arch Makefile may override CC so keep this a    987 # arch Makefile may override CC so keep this after arch Makefile is included
976 NOSTDINC_FLAGS += -nostdinc                    !! 988 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
                                                   >> 989 
                                                   >> 990 # warn about C99 declaration after statement
                                                   >> 991 KBUILD_CFLAGS += -Wdeclaration-after-statement
977                                                   992 
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 993 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
979 # the kernel uses only C99 flexible arrays for !! 994 KBUILD_CFLAGS += -Wvla
980 # arrays. Enforce this for everything that may !! 995 
981 # perform bounds checking.                     !! 996 # disable pointer signed / unsigned warnings in gcc 4.0
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl !! 997 KBUILD_CFLAGS += -Wno-pointer-sign
983                                                !! 998 
984 #Currently, disable -Wstringop-overflow for GC !! 999 # disable stringop warnings in gcc 8+
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW !! 1000 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + !! 1001 
                                                   >> 1002 # We'll want to enable this eventually, but it's not going away for 5.7 at least
                                                   >> 1003 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
                                                   >> 1004 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
                                                   >> 1005 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
                                                   >> 1006 
                                                   >> 1007 # Another good warning that we'll want to enable eventually
                                                   >> 1008 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
                                                   >> 1009 
                                                   >> 1010 # Enabled with W=2, disabled by default as noisy
                                                   >> 1011 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
987                                                   1012 
988 # disable invalid "can't wrap" optimizations f    1013 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS   += -fno-strict-overflow           1014 KBUILD_CFLAGS   += -fno-strict-overflow
990                                                   1015 
991 # Make sure -fstack-check isn't enabled (like     1016 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
992 KBUILD_CFLAGS  += -fno-stack-check                1017 KBUILD_CFLAGS  += -fno-stack-check
993                                                   1018 
994 # conserve stack if available                     1019 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC                         !! 1020 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
996 KBUILD_CFLAGS   += -fconserve-stack            !! 1021 
997 endif                                          !! 1022 # Prohibit date/time macros, which would make the build non-deterministic
                                                   >> 1023 KBUILD_CFLAGS   += -Werror=date-time
                                                   >> 1024 
                                                   >> 1025 # enforce correct pointer usage
                                                   >> 1026 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
                                                   >> 1027 
                                                   >> 1028 # Require designated initializers for all marked structures
                                                   >> 1029 KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
998                                                   1030 
999 # change __FILE__ to the relative path from th    1031 # change __FILE__ to the relative path from the srctree
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p    1032 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1001                                                  1033 
1002 # include additional Makefiles when needed       1034 # include additional Makefiles when needed
1003 include-y                       := scripts/Ma    1035 include-y                       := scripts/Makefile.extrawarn
1004 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma << 
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma << 
1006 include-$(CONFIG_KASAN)         += scripts/Ma    1036 include-$(CONFIG_KASAN)         += scripts/Makefile.kasan
1007 include-$(CONFIG_KCSAN)         += scripts/Ma    1037 include-$(CONFIG_KCSAN)         += scripts/Makefile.kcsan
1008 include-$(CONFIG_KMSAN)         += scripts/Ma << 
1009 include-$(CONFIG_UBSAN)         += scripts/Ma    1038 include-$(CONFIG_UBSAN)         += scripts/Makefile.ubsan
1010 include-$(CONFIG_KCOV)          += scripts/Ma    1039 include-$(CONFIG_KCOV)          += scripts/Makefile.kcov
1011 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma << 
1012 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma    1040 include-$(CONFIG_GCC_PLUGINS)   += scripts/Makefile.gcc-plugins
1013                                                  1041 
1014 include $(addprefix $(srctree)/, $(include-y)    1042 include $(addprefix $(srctree)/, $(include-y))
1015                                                  1043 
1016 # scripts/Makefile.gcc-plugins is intentional    1044 # scripts/Makefile.gcc-plugins is intentionally included last.
1017 # Do not add $(call cc-option,...) below this    1045 # Do not add $(call cc-option,...) below this line. When you build the kernel
1018 # from the clean source tree, the GCC plugins    1046 # from the clean source tree, the GCC plugins do not exist at this point.
1019                                                  1047 
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS  !! 1048 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS)                  1049 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1022 KBUILD_AFLAGS   += $(KAFLAGS)                    1050 KBUILD_AFLAGS   += $(KAFLAGS)
1023 KBUILD_CFLAGS   += $(KCFLAGS)                    1051 KBUILD_CFLAGS   += $(KCFLAGS)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)             << 
1025                                                  1052 
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1         1053 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1027 LDFLAGS_vmlinux += --build-id=sha1               1054 LDFLAGS_vmlinux += --build-id=sha1
1028                                                  1055 
1029 KBUILD_LDFLAGS  += -z noexecstack             << 
1030 ifeq ($(CONFIG_LD_IS_BFD),y)                  << 
1031 KBUILD_LDFLAGS  += $(call ld-option,--no-warn << 
1032 endif                                         << 
1033                                               << 
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)                1056 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X                         !! 1057 LDFLAGS_vmlinux += $(call ld-option, -X,)
1036 endif                                            1058 endif
1037                                                  1059 
1038 ifeq ($(CONFIG_RELR),y)                          1060 ifeq ($(CONFIG_RELR),y)
1039 # ld.lld before 15 did not support -z pack-re !! 1061 LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy << 
1041 endif                                            1062 endif
1042                                                  1063 
1043 # We never want expected sections to be place    1064 # We never want expected sections to be placed heuristically by the
1044 # linker. All sections should be explicitly n    1065 # linker. All sections should be explicitly named in the linker script.
1045 ifdef CONFIG_LD_ORPHAN_WARN                      1066 ifdef CONFIG_LD_ORPHAN_WARN
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG !! 1067 LDFLAGS_vmlinux += --orphan-handling=warn
1047 endif                                            1068 endif
1048                                                  1069 
1049 # Align the bit size of userspace programs wi    1070 # Align the bit size of userspace programs with the kernel
1050 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --ta    1071 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta    1072 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1052                                                  1073 
1053 # make the checker run with the right archite    1074 # make the checker run with the right architecture
1054 CHECKFLAGS += --arch=$(ARCH)                     1075 CHECKFLAGS += --arch=$(ARCH)
1055                                                  1076 
1056 # insure the checker run with the right endia    1077 # insure the checker run with the right endianness
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-    1078 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1058                                                  1079 
1059 # the checker needs the correct machine size     1080 # the checker needs the correct machine size
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)    1081 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1061                                                  1082 
1062 # Default kernel image to build when no speci    1083 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman    1084 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment                         1085 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi    1086 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value                             1087 # this default value
1067 export KBUILD_IMAGE ?= vmlinux                   1088 export KBUILD_IMAGE ?= vmlinux
1068                                                  1089 
1069 #                                                1090 #
1070 # INSTALL_PATH specifies where to place the u    1091 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i    1092 # images. Default is /boot, but you can set it to other values
1072 export  INSTALL_PATH ?= /boot                    1093 export  INSTALL_PATH ?= /boot
1073                                                  1094 
1074 #                                                1095 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re    1096 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1076 # Like INSTALL_MOD_PATH, it isn't defined in     1097 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1077 # an argument if needed. Otherwise it default    1098 # an argument if needed. Otherwise it defaults to the kernel install path
1078 #                                                1099 #
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d    1100 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1080                                                  1101 
1081 #                                                1102 #
1082 # INSTALL_MOD_PATH specifies a prefix to MODL    1103 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots.  This     1104 # relocations required by build roots.  This is not defined in the
1084 # makefile but the argument can be passed to     1105 # makefile but the argument can be passed to make if needed.
1085 #                                                1106 #
1086                                                  1107 
1087 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    1108 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB                                    1109 export MODLIB
1089                                                  1110 
1090 PHONY += prepare0                                1111 PHONY += prepare0
1091                                                  1112 
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD),    1113 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1093 export MODORDER := $(extmod_prefix)modules.or    1114 export MODORDER := $(extmod_prefix)modules.order
1094 export MODULES_NSDEPS := $(extmod_prefix)modu    1115 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1095                                                  1116 
1096 ifeq ($(KBUILD_EXTMOD),)                         1117 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 1118 core-y          += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1097                                                  1119 
1098 build-dir       := .                          !! 1120 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, \
1099 clean-dirs      := $(sort . Documentation \   !! 1121                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
                                                   >> 1122                      $(libs-y) $(libs-m)))
                                                   >> 1123 
                                                   >> 1124 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1100                      $(patsubst %/,%,$(filter    1125                      $(patsubst %/,%,$(filter %/, $(core-) \
1101                         $(drivers-) $(libs-))    1126                         $(drivers-) $(libs-))))
1102                                                  1127 
1103 export ARCH_CORE        := $(core-y)          !! 1128 subdir-modorder := $(addsuffix modules.order,$(filter %/, \
1104 export ARCH_LIB         := $(filter %/, $(lib !! 1129                         $(core-y) $(core-m) $(libs-y) $(libs-m) \
1105 export ARCH_DRIVERS     := $(drivers-y) $(dri !! 1130                         $(drivers-y) $(drivers-m)))
1106 # Externally visible symbols (used by link-vm !! 1131 
                                                   >> 1132 build-dirs      := $(vmlinux-dirs)
                                                   >> 1133 clean-dirs      := $(vmlinux-alldirs)
1107                                                  1134 
1108 KBUILD_VMLINUX_OBJS := ./built-in.a           !! 1135 # Externally visible symbols (used by link-vmlinux.sh)
                                                   >> 1136 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
                                                   >> 1137 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1109 ifdef CONFIG_MODULES                             1138 ifdef CONFIG_MODULES
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a    1139 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib    1140 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1112 else                                             1141 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a,    1142 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1114 endif                                            1143 endif
                                                   >> 1144 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1115                                                  1145 
1116 export KBUILD_VMLINUX_LIBS                    !! 1146 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1117 export KBUILD_LDS          := arch/$(SRCARCH)    1147 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
                                                   >> 1148 # used by scripts/Makefile.package
                                                   >> 1149 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
                                                   >> 1150 
                                                   >> 1151 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1118                                                  1152 
                                                   >> 1153 # Recurse until adjust_autoksyms.sh is satisfied
                                                   >> 1154 PHONY += autoksyms_recursive
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS                   1155 ifdef CONFIG_TRIM_UNUSED_KSYMS
1120 # For the kernel to actually contain only the    1156 # For the kernel to actually contain only the needed exported symbols,
1121 # we have to build modules as well to determi    1157 # we have to build modules as well to determine what those symbols are.
                                                   >> 1158 # (this can be evaluated only once include/config/auto.conf has been included)
1122 KBUILD_MODULES := 1                              1159 KBUILD_MODULES := 1
                                                   >> 1160 
                                                   >> 1161 autoksyms_recursive: descend modules.order
                                                   >> 1162         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
                                                   >> 1163           "$(MAKE) -f $(srctree)/Makefile vmlinux"
1123 endif                                            1164 endif
1124                                                  1165 
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 1166 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1126 quiet_cmd_ar_vmlinux.a = AR      $@           << 
1127       cmd_ar_vmlinux.a = \                    << 
1128         rm -f $@; \                           << 
1129         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 
1130         $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 
1131                                               << 
1132 targets += vmlinux.a                          << 
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 
1134         $(call if_changed,ar_vmlinux.a)       << 
1135                                               << 
1136 PHONY += vmlinux_o                            << 
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)   << 
1138         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1139                                                  1167 
1140 vmlinux.o modules.builtin.modinfo modules.bui !! 1168 quiet_cmd_autoksyms_h = GEN     $@
1141         @:                                    !! 1169       cmd_autoksyms_h = mkdir -p $(dir $@); \
                                                   >> 1170                         $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
                                                   >> 1171 
                                                   >> 1172 $(autoksyms_h):
                                                   >> 1173         $(call cmd,autoksyms_h)
                                                   >> 1174 
                                                   >> 1175 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
                                                   >> 1176 
                                                   >> 1177 # Final link of vmlinux with optional arch pass after final link
                                                   >> 1178 cmd_link-vmlinux =                                                 \
                                                   >> 1179         $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
                                                   >> 1180         $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1142                                                  1181 
1143 PHONY += vmlinux                              !! 1182 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1144 # LDFLAGS_vmlinux in the top Makefile defines !! 1183         +$(call if_changed_dep,link-vmlinux)
1145 # not for decompressors. LDFLAGS_vmlinux in a !! 1184 
1146 # unrelated; the decompressors just happen to !! 1185 targets := vmlinux
1147 # arch/*/boot/compressed/vmlinux.             << 
1148 # Export LDFLAGS_vmlinux only to scripts/Make << 
1149 #                                             << 
1150 # _LDFLAGS_vmlinux is a workaround for the 'p << 
1151 #   https://savannah.gnu.org/bugs/?61463      << 
1152 # For Make > 4.4, the following simple code w << 
1153 #  vmlinux: private export LDFLAGS_vmlinux := << 
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost      << 
1157         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1158                                                  1186 
1159 # The actual objects are generated when desce    1187 # The actual objects are generated when descending,
1160 # make sure no implicit rule kicks in            1188 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1189 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1162                                                  1190 
1163 ifeq ($(origin KERNELRELEASE),file)           !! 1191 filechk_kernel.release = \
1164 filechk_kernel.release = $(srctree)/scripts/s !! 1192         echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1165 else                                          << 
1166 filechk_kernel.release = echo $(KERNELRELEASE << 
1167 endif                                         << 
1168                                                  1193 
1169 # Store (new) KERNELRELEASE string in include    1194 # Store (new) KERNELRELEASE string in include/config/kernel.release
1170 include/config/kernel.release: FORCE             1195 include/config/kernel.release: FORCE
1171         $(call filechk,kernel.release)           1196         $(call filechk,kernel.release)
1172                                                  1197 
1173 # Additional helpers built in scripts/           1198 # Additional helpers built in scripts/
1174 # Carefully list dependencies so we do not tr    1199 # Carefully list dependencies so we do not try to build scripts twice
1175 # in parallel                                    1200 # in parallel
1176 PHONY += scripts                                 1201 PHONY += scripts
1177 scripts: scripts_basic scripts_dtc               1202 scripts: scripts_basic scripts_dtc
1178         $(Q)$(MAKE) $(build)=$(@)                1203         $(Q)$(MAKE) $(build)=$(@)
1179                                                  1204 
1180 # Things we need to do before we recursively     1205 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare".        1206 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is    1207 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w    1208 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed /     1209 # version.h and scripts_basic is processed / created.
1185                                                  1210 
1186 PHONY += prepare archprepare                     1211 PHONY += prepare archprepare
1187                                                  1212 
1188 archprepare: outputmakefile archheaders archs    1213 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1189         asm-generic $(version_h) include/gene !! 1214         asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1190         include/generated/compile.h include/g !! 1215         include/generated/autoconf.h remove-stale-files
1191                                                  1216 
1192 prepare0: archprepare                            1217 prepare0: archprepare
1193         $(Q)$(MAKE) $(build)=scripts/mod         1218         $(Q)$(MAKE) $(build)=scripts/mod
1194         $(Q)$(MAKE) $(build)=. prepare        !! 1219         $(Q)$(MAKE) $(build)=.
1195                                                  1220 
1196 # All the preparing..                            1221 # All the preparing..
1197 prepare: prepare0                                1222 prepare: prepare0
1198 ifdef CONFIG_RUST                             << 
1199         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1200         $(Q)$(MAKE) $(build)=rust             << 
1201 endif                                         << 
1202                                                  1223 
1203 PHONY += remove-stale-files                      1224 PHONY += remove-stale-files
1204 remove-stale-files:                              1225 remove-stale-files:
1205         $(Q)$(srctree)/scripts/remove-stale-f    1226         $(Q)$(srctree)/scripts/remove-stale-files
1206                                                  1227 
1207 # Support for using generic headers in asm-ge    1228 # Support for using generic headers in asm-generic
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1229 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209                                                  1230 
1210 PHONY += asm-generic uapi-asm-generic            1231 PHONY += asm-generic uapi-asm-generic
1211 asm-generic: uapi-asm-generic                    1232 asm-generic: uapi-asm-generic
1212         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1233         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1213         generic=include/asm-generic              1234         generic=include/asm-generic
1214 uapi-asm-generic:                                1235 uapi-asm-generic:
1215         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1236         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1216         generic=include/uapi/asm-generic         1237         generic=include/uapi/asm-generic
1217                                                  1238 
1218 # Generate some files                            1239 # Generate some files
1219 # -------------------------------------------    1240 # ---------------------------------------------------------------------------
1220                                                  1241 
1221 # KERNELRELEASE can change from a few differe    1242 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force    1243 # needs to be updated, so this check is forced on all builds
1223                                                  1244 
1224 uts_len := 64                                    1245 uts_len := 64
1225 define filechk_utsrelease.h                      1246 define filechk_utsrelease.h
1226         if [ `echo -n "$(KERNELRELEASE)" | wc    1247         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227           echo '"$(KERNELRELEASE)" exceeds $(    1248           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1228           exit 1;                                1249           exit 1;                                                         \
1229         fi;                                      1250         fi;                                                               \
1230         echo \#define UTS_RELEASE \"$(KERNELR    1251         echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 endef                                            1252 endef
1232                                                  1253 
1233 define filechk_version.h                         1254 define filechk_version.h
1234         if [ $(SUBLEVEL) -gt 255 ]; then         1255         if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1235                 echo \#define LINUX_VERSION_C    1256                 echo \#define LINUX_VERSION_CODE $(shell                 \
1236                 expr $(VERSION) \* 65536 + $(    1257                 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1237         else                                     1258         else                                                             \
1238                 echo \#define LINUX_VERSION_C    1259                 echo \#define LINUX_VERSION_CODE $(shell                 \
1239                 expr $(VERSION) \* 65536 + $(    1260                 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1240         fi;                                      1261         fi;                                                              \
1241         echo '#define KERNEL_VERSION(a,b,c) (    1262         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
1242         ((c) > 255 ? 255 : (c)))';               1263         ((c) > 255 ? 255 : (c)))';                                       \
1243         echo \#define LINUX_VERSION_MAJOR $(V    1264         echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
1244         echo \#define LINUX_VERSION_PATCHLEVE    1265         echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
1245         echo \#define LINUX_VERSION_SUBLEVEL     1266         echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1246 endef                                            1267 endef
1247                                                  1268 
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1269 $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1249 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1270 $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
1250 $(version_h): FORCE                              1271 $(version_h): FORCE
1251         $(call filechk,version.h)                1272         $(call filechk,version.h)
1252                                                  1273 
1253 include/generated/utsrelease.h: include/confi    1274 include/generated/utsrelease.h: include/config/kernel.release FORCE
1254         $(call filechk,utsrelease.h)             1275         $(call filechk,utsrelease.h)
1255                                                  1276 
1256 filechk_compile.h = $(srctree)/scripts/mkcomp << 
1257         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 
1258                                               << 
1259 include/generated/compile.h: FORCE            << 
1260         $(call filechk,compile.h)             << 
1261                                               << 
1262 PHONY += headerdep                               1277 PHONY += headerdep
1263 headerdep:                                       1278 headerdep:
1264         $(Q)find $(srctree)/include/ -name '*    1279         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1265         $(srctree)/scripts/headerdep.pl -I$(s    1280         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266                                                  1281 
1267 # -------------------------------------------    1282 # ---------------------------------------------------------------------------
1268 # Kernel headers                                 1283 # Kernel headers
1269                                                  1284 
1270 #Default location for installed headers          1285 #Default location for installed headers
1271 export INSTALL_HDR_PATH = $(objtree)/usr         1286 export INSTALL_HDR_PATH = $(objtree)/usr
1272                                                  1287 
1273 quiet_cmd_headers_install = INSTALL $(INSTALL    1288 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1274       cmd_headers_install = \                    1289       cmd_headers_install = \
1275         mkdir -p $(INSTALL_HDR_PATH); \          1290         mkdir -p $(INSTALL_HDR_PATH); \
1276         rsync -mrl --include='*/' --include='    1291         rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1277         usr/include $(INSTALL_HDR_PATH)          1292         usr/include $(INSTALL_HDR_PATH)
1278                                                  1293 
1279 PHONY += headers_install                         1294 PHONY += headers_install
1280 headers_install: headers                         1295 headers_install: headers
1281         $(call cmd,headers_install)              1296         $(call cmd,headers_install)
1282                                                  1297 
1283 PHONY += archheaders archscripts                 1298 PHONY += archheaders archscripts
1284                                                  1299 
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he    1300 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1286                                                  1301 
1287 PHONY += headers                                 1302 PHONY += headers
1288 headers: $(version_h) scripts_unifdef uapi-as    1303 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1289         $(if $(filter um, $(SRCARCH)), $(erro !! 1304         $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
                                                   >> 1305           $(error Headers not exportable for the $(SRCARCH) architecture))
1290         $(Q)$(MAKE) $(hdr-inst)=include/uapi     1306         $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC    1307         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1292                                                  1308 
                                                   >> 1309 # Deprecated. It is no-op now.
                                                   >> 1310 PHONY += headers_check
                                                   >> 1311 headers_check:
                                                   >> 1312         @echo >&2 "=================== WARNING ==================="
                                                   >> 1313         @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
                                                   >> 1314         @echo >&2 "and will be removed after Linux 5.15 release."
                                                   >> 1315         @echo >&2 "Please remove headers_check from your scripts."
                                                   >> 1316         @echo >&2 "==============================================="
                                                   >> 1317 
1293 ifdef CONFIG_HEADERS_INSTALL                     1318 ifdef CONFIG_HEADERS_INSTALL
1294 prepare: headers                                 1319 prepare: headers
1295 endif                                            1320 endif
1296                                                  1321 
1297 PHONY += scripts_unifdef                         1322 PHONY += scripts_unifdef
1298 scripts_unifdef: scripts_basic                   1323 scripts_unifdef: scripts_basic
1299         $(Q)$(MAKE) $(build)=scripts scripts/    1324         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1300                                                  1325 
1301 # -------------------------------------------    1326 # ---------------------------------------------------------------------------
1302 # Install                                        1327 # Install
1303                                                  1328 
1304 # Many distributions have the custom install     1329 # Many distributions have the custom install script, /sbin/installkernel.
1305 # If DKMS is installed, 'make install' will e !! 1330 # If DKMS is installed, 'make install' will eventually recuses back
1306 # to this Makefile to build and install exter !! 1331 # to the this Makefile to build and install external modules.
1307 # Cancel sub_make_done so that options such a    1332 # Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
1308                                                  1333 
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH)   !! 1334 install: sub_make_done :=
1310       cmd_install = unset sub_make_done; $(sr << 
1311                                               << 
1312 # ------------------------------------------- << 
1313 # vDSO install                                << 
1314                                               << 
1315 PHONY += vdso_install                         << 
1316 vdso_install: export INSTALL_FILES = $(vdso-i << 
1317 vdso_install:                                 << 
1318         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1319                                                  1335 
1320 # -------------------------------------------    1336 # ---------------------------------------------------------------------------
1321 # Tools                                          1337 # Tools
1322                                                  1338 
1323 ifdef CONFIG_OBJTOOL                          !! 1339 ifdef CONFIG_STACK_VALIDATION
1324 prepare: tools/objtool                           1340 prepare: tools/objtool
1325 endif                                            1341 endif
1326                                                  1342 
1327 ifdef CONFIG_BPF                                 1343 ifdef CONFIG_BPF
1328 ifdef CONFIG_DEBUG_INFO_BTF                      1344 ifdef CONFIG_DEBUG_INFO_BTF
1329 prepare: tools/bpf/resolve_btfids                1345 prepare: tools/bpf/resolve_btfids
1330 endif                                            1346 endif
1331 endif                                            1347 endif
1332                                                  1348 
1333 # The tools build system is not a part of Kbu << 
1334 # its own unique issues. If you need to integ << 
1335 # please consider locating that tool outside  << 
1336 # standard Kbuild "hostprogs" syntax instead  << 
1337 # here. See Documentation/kbuild/makefiles.rs << 
1338                                               << 
1339 PHONY += resolve_btfids_clean                    1349 PHONY += resolve_btfids_clean
1340                                                  1350 
1341 resolve_btfids_O = $(abspath $(objtree))/tool    1351 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1342                                                  1352 
1343 # tools/bpf/resolve_btfids directory might no    1353 # tools/bpf/resolve_btfids directory might not exist
1344 # in output directory, skip its clean in that    1354 # in output directory, skip its clean in that case
1345 resolve_btfids_clean:                            1355 resolve_btfids_clean:
1346 ifneq ($(wildcard $(resolve_btfids_O)),)         1356 ifneq ($(wildcard $(resolve_btfids_O)),)
1347         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/    1357         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1348 endif                                            1358 endif
1349                                                  1359 
1350 # Clear a bunch of variables before executing    1360 # Clear a bunch of variables before executing the submake
1351 ifeq ($(quiet),silent_)                          1361 ifeq ($(quiet),silent_)
1352 tools_silent=s                                   1362 tools_silent=s
1353 endif                                            1363 endif
1354                                                  1364 
1355 tools/: FORCE                                    1365 tools/: FORCE
1356         $(Q)mkdir -p $(objtree)/tools            1366         $(Q)mkdir -p $(objtree)/tools
1357         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too    1367         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1358                                                  1368 
1359 tools/%: FORCE                                   1369 tools/%: FORCE
1360         $(Q)mkdir -p $(objtree)/tools            1370         $(Q)mkdir -p $(objtree)/tools
1361         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too    1371         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1362                                                  1372 
1363 # -------------------------------------------    1373 # ---------------------------------------------------------------------------
1364 # Kernel selftest                                1374 # Kernel selftest
1365                                                  1375 
1366 PHONY += kselftest                               1376 PHONY += kselftest
1367 kselftest: headers                            !! 1377 kselftest:
1368         $(Q)$(MAKE) -C $(srctree)/tools/testi    1378         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1369                                                  1379 
1370 kselftest-%: headers FORCE                    !! 1380 kselftest-%: FORCE
1371         $(Q)$(MAKE) -C $(srctree)/tools/testi    1381         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1372                                                  1382 
1373 PHONY += kselftest-merge                         1383 PHONY += kselftest-merge
1374 kselftest-merge:                                 1384 kselftest-merge:
1375         $(if $(wildcard $(objtree)/.config),,    1385         $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1376         $(Q)find $(srctree)/tools/testing/sel !! 1386         $(Q)find $(srctree)/tools/testing/selftests -name config | \
1377                 xargs $(srctree)/scripts/kcon !! 1387                 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1378         $(Q)$(MAKE) -f $(srctree)/Makefile ol    1388         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1379                                                  1389 
1380 # -------------------------------------------    1390 # ---------------------------------------------------------------------------
1381 # Devicetree files                               1391 # Devicetree files
1382                                                  1392 
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/    1393 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1384 dtstree := arch/$(SRCARCH)/boot/dts              1394 dtstree := arch/$(SRCARCH)/boot/dts
1385 endif                                            1395 endif
1386                                                  1396 
1387 ifneq ($(dtstree),)                              1397 ifneq ($(dtstree),)
1388                                                  1398 
1389 %.dtb: dtbs_prepare                           !! 1399 %.dtb: include/config/kernel.release scripts_dtc
1390         $(Q)$(MAKE) $(build)=$(dtstree) $(dts    1400         $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1391                                                  1401 
1392 %.dtbo: dtbs_prepare                          !! 1402 %.dtbo: include/config/kernel.release scripts_dtc
1393         $(Q)$(MAKE) $(build)=$(dtstree) $(dts    1403         $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1394                                                  1404 
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1405 PHONY += dtbs dtbs_install dtbs_check
1396 dtbs: dtbs_prepare                            !! 1406 dtbs: include/config/kernel.release scripts_dtc
1397         $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1407         $(Q)$(MAKE) $(build)=$(dtstree)
1398                                               << 
1399 # include/config/kernel.release is actually n << 
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) << 
1401 # dtbs_install depend on it as dtbs_install m << 
1402 dtbs_prepare: include/config/kernel.release s << 
1403                                                  1408 
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),    1409 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1405 export CHECK_DTBS=y                              1410 export CHECK_DTBS=y
1406 endif                                         !! 1411 dtbs: dt_binding_check
1407                                               << 
1408 ifneq ($(CHECK_DTBS),)                        << 
1409 dtbs_prepare: dt_binding_schemas              << 
1410 endif                                            1412 endif
1411                                                  1413 
1412 dtbs_check: dtbs                                 1414 dtbs_check: dtbs
1413                                                  1415 
1414 dtbs_install:                                    1416 dtbs_install:
1415         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1417         $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1416                                                  1418 
1417 ifdef CONFIG_OF_EARLY_FLATTREE                   1419 ifdef CONFIG_OF_EARLY_FLATTREE
1418 all: dtbs                                        1420 all: dtbs
1419 endif                                            1421 endif
1420                                                  1422 
1421 endif                                            1423 endif
1422                                                  1424 
1423 PHONY += scripts_dtc                             1425 PHONY += scripts_dtc
1424 scripts_dtc: scripts_basic                       1426 scripts_dtc: scripts_basic
1425         $(Q)$(MAKE) $(build)=scripts/dtc         1427         $(Q)$(MAKE) $(build)=scripts/dtc
1426                                                  1428 
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO    1429 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1428 export CHECK_DTBS=y                           !! 1430 export CHECK_DT_BINDING=y
1429 endif                                            1431 endif
1430                                                  1432 
1431 PHONY += dt_binding_check dt_binding_schemas  !! 1433 PHONY += dt_binding_check
1432 dt_binding_check: dt_binding_schemas scripts_ !! 1434 dt_binding_check: scripts_dtc
1433         $(Q)$(MAKE) $(build)=Documentation/de << 
1434                                               << 
1435 dt_binding_schemas:                           << 
1436         $(Q)$(MAKE) $(build)=Documentation/de    1435         $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1437                                                  1436 
1438 PHONY += dt_compatible_check                  << 
1439 dt_compatible_check: dt_binding_schemas       << 
1440         $(Q)$(MAKE) $(build)=Documentation/de << 
1441                                               << 
1442 # -------------------------------------------    1437 # ---------------------------------------------------------------------------
1443 # Modules                                        1438 # Modules
1444                                                  1439 
1445 ifdef CONFIG_MODULES                             1440 ifdef CONFIG_MODULES
1446                                                  1441 
1447 # By default, build modules as well              1442 # By default, build modules as well
1448                                                  1443 
1449 all: modules                                     1444 all: modules
1450                                                  1445 
1451 # When we're building modules with modversion    1446 # When we're building modules with modversions, we need to consider
1452 # the built-in objects during the descend as     1447 # the built-in objects during the descend as well, in order to
1453 # make sure the checksums are up to date befo    1448 # make sure the checksums are up to date before we record them.
1454 ifdef CONFIG_MODVERSIONS                         1449 ifdef CONFIG_MODVERSIONS
1455   KBUILD_BUILTIN := 1                            1450   KBUILD_BUILTIN := 1
1456 endif                                            1451 endif
1457                                                  1452 
1458 # Build modules                                  1453 # Build modules
1459 #                                                1454 #
                                                   >> 1455 # A module can be listed more than once in obj-m resulting in
                                                   >> 1456 # duplicate lines in modules.order files.  Those are removed
                                                   >> 1457 # using awk while concatenating to the final file.
1460                                                  1458 
1461 # *.ko are usually independent of vmlinux, bu !! 1459 PHONY += modules
1462 # is an exception.                            !! 1460 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES           << 
1464 KBUILD_BUILTIN := 1                           << 
1465 modules: vmlinux                              << 
1466 endif                                         << 
1467                                                  1461 
1468 modules: modules_prepare                      !! 1462 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
                                                   >> 1463 
                                                   >> 1464 modules.order: $(subdir-modorder) FORCE
                                                   >> 1465         $(call if_changed,modules_order)
                                                   >> 1466 
                                                   >> 1467 targets += modules.order
1469                                                  1468 
1470 # Target to prepare building external modules    1469 # Target to prepare building external modules
                                                   >> 1470 PHONY += modules_prepare
1471 modules_prepare: prepare                         1471 modules_prepare: prepare
1472         $(Q)$(MAKE) $(build)=scripts scripts/    1472         $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1473                                                  1473 
                                                   >> 1474 export modules_sign_only :=
                                                   >> 1475 
                                                   >> 1476 ifeq ($(CONFIG_MODULE_SIG),y)
                                                   >> 1477 PHONY += modules_sign
                                                   >> 1478 modules_sign: modules_install
                                                   >> 1479         @:
                                                   >> 1480 
                                                   >> 1481 # modules_sign is a subset of modules_install.
                                                   >> 1482 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
                                                   >> 1483 ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
                                                   >> 1484 modules_sign_only := y
                                                   >> 1485 endif
                                                   >> 1486 endif
                                                   >> 1487 
                                                   >> 1488 modinst_pre :=
                                                   >> 1489 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
                                                   >> 1490 modinst_pre := __modinst_pre
                                                   >> 1491 endif
                                                   >> 1492 
                                                   >> 1493 modules_install: $(modinst_pre)
                                                   >> 1494 PHONY += __modinst_pre
                                                   >> 1495 __modinst_pre:
                                                   >> 1496         @rm -rf $(MODLIB)/kernel
                                                   >> 1497         @rm -f $(MODLIB)/source
                                                   >> 1498         @mkdir -p $(MODLIB)/kernel
                                                   >> 1499         @ln -s $(abspath $(srctree)) $(MODLIB)/source
                                                   >> 1500         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                                                   >> 1501                 rm -f $(MODLIB)/build ; \
                                                   >> 1502                 ln -s $(CURDIR) $(MODLIB)/build ; \
                                                   >> 1503         fi
                                                   >> 1504         @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
                                                   >> 1505         @cp -f modules.builtin $(MODLIB)/
                                                   >> 1506         @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
                                                   >> 1507 
1474 endif # CONFIG_MODULES                           1508 endif # CONFIG_MODULES
1475                                                  1509 
1476 ###                                              1510 ###
1477 # Cleaning is done on three levels.              1511 # Cleaning is done on three levels.
1478 # make clean     Delete most generated files     1512 # make clean     Delete most generated files
1479 #                Leave enough to build extern    1513 #                Leave enough to build external modules
1480 # make mrproper  Delete the current configura    1514 # make mrproper  Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files,     1515 # make distclean Remove editor backup files, patch leftover files and the like
1482                                                  1516 
1483 # Directories & files removed with 'make clea    1517 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1518 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
1485                modules.builtin modules.builti    1519                modules.builtin modules.builtin.modinfo modules.nsdeps \
1486                compile_commands.json rust/tes !! 1520                compile_commands.json .thinlto-cache
1487                rust-project.json .vmlinux.obj << 
1488                                                  1521 
1489 # Directories & files removed with 'make mrpr    1522 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene    1523 MRPROPER_FILES += include/config include/generated          \
1491                   arch/$(SRCARCH)/include/gen !! 1524                   arch/$(SRCARCH)/include/generated .tmp_objdiff \
1492                   debian snap tar-install PKG !! 1525                   debian snap tar-install \
1493                   .config .config.old .versio    1526                   .config .config.old .version \
1494                   Module.symvers \               1527                   Module.symvers \
1495                   certs/signing_key.pem \     !! 1528                   certs/signing_key.pem certs/signing_key.x509 \
1496                   certs/x509.genkey \            1529                   certs/x509.genkey \
1497                   vmlinux-gdb.py \               1530                   vmlinux-gdb.py \
1498                   rpmbuild \                  !! 1531                   *.spec
1499                   rust/libmacros.so           << 
1500                                                  1532 
1501 # clean - Delete most, but leave enough to bu    1533 # clean - Delete most, but leave enough to build external modules
1502 #                                                1534 #
1503 clean: private rm-files := $(CLEAN_FILES)     !! 1535 clean: rm-files := $(CLEAN_FILES)
1504                                                  1536 
1505 PHONY += archclean vmlinuxclean                  1537 PHONY += archclean vmlinuxclean
1506                                                  1538 
1507 vmlinuxclean:                                    1539 vmlinuxclean:
1508         $(Q)$(CONFIG_SHELL) $(srctree)/script    1540         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1509         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f    1541         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1510                                                  1542 
1511 clean: archclean vmlinuxclean resolve_btfids_    1543 clean: archclean vmlinuxclean resolve_btfids_clean
1512                                                  1544 
1513 # mrproper - Delete all generated files, incl    1545 # mrproper - Delete all generated files, including .config
1514 #                                                1546 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1547 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1516 mrproper-dirs      := $(addprefix _mrproper_,    1548 mrproper-dirs      := $(addprefix _mrproper_,scripts)
1517                                                  1549 
1518 PHONY += $(mrproper-dirs) mrproper               1550 PHONY += $(mrproper-dirs) mrproper
1519 $(mrproper-dirs):                                1551 $(mrproper-dirs):
1520         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    1552         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521                                                  1553 
1522 mrproper: clean $(mrproper-dirs)                 1554 mrproper: clean $(mrproper-dirs)
1523         $(call cmd,rmfiles)                      1555         $(call cmd,rmfiles)
1524         @find . $(RCS_FIND_IGNORE) \          << 
1525                 \( -name '*.rmeta' \) \       << 
1526                 -type f -print | xargs rm -f  << 
1527                                                  1556 
1528 # distclean                                      1557 # distclean
1529 #                                                1558 #
1530 PHONY += distclean                               1559 PHONY += distclean
1531                                                  1560 
1532 distclean: mrproper                              1561 distclean: mrproper
1533         @find . $(RCS_FIND_IGNORE) \             1562         @find . $(RCS_FIND_IGNORE) \
1534                 \( -name '*.orig' -o -name '*    1563                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535                 -o -name '*.bak' -o -name '#*    1564                 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1536                 -o -name 'core' -o -name tags    1565                 -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
1537                 -o -name GPATH -o -name GRTAG    1566                 -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
1538                 -type f -print | xargs rm -f     1567                 -type f -print | xargs rm -f
1539                                                  1568 
1540                                                  1569 
1541 # Packaging of the kernel to various formats     1570 # Packaging of the kernel to various formats
1542 # -------------------------------------------    1571 # ---------------------------------------------------------------------------
1543                                                  1572 
1544 %src-pkg: FORCE                                  1573 %src-pkg: FORCE
1545         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1574         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1546 %pkg: include/config/kernel.release FORCE        1575 %pkg: include/config/kernel.release FORCE
1547         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1576         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1548                                                  1577 
1549 # Brief documentation of the typical targets     1578 # Brief documentation of the typical targets used
1550 # -------------------------------------------    1579 # ---------------------------------------------------------------------------
1551                                                  1580 
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC    1581 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards)))            1582 boards := $(sort $(notdir $(boards)))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc    1583 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/=    1584 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556                                                  1585 
1557 PHONY += help                                    1586 PHONY += help
1558 help:                                            1587 help:
1559         @echo  'Cleaning targets:'               1588         @echo  'Cleaning targets:'
1560         @echo  '  clean           - Remove mo    1589         @echo  '  clean           - Remove most generated files but keep the config and'
1561         @echo  '                    enough bu    1590         @echo  '                    enough build support to build external modules'
1562         @echo  '  mrproper        - Remove al    1591         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1563         @echo  '  distclean       - mrproper     1592         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1564         @echo  ''                                1593         @echo  ''
                                                   >> 1594         @echo  'Configuration targets:'
1565         @$(MAKE) -f $(srctree)/scripts/kconfi    1595         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566         @echo  ''                                1596         @echo  ''
1567         @echo  'Other generic targets:'          1597         @echo  'Other generic targets:'
1568         @echo  '  all             - Build all    1598         @echo  '  all             - Build all targets marked with [*]'
1569         @echo  '* vmlinux         - Build the    1599         @echo  '* vmlinux         - Build the bare kernel'
1570         @echo  '* modules         - Build all    1600         @echo  '* modules         - Build all modules'
1571         @echo  '  modules_install - Install a    1601         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572         @echo  '  vdso_install    - Install u << 
1573         @echo  '  dir/            - Build all    1602         @echo  '  dir/            - Build all files in dir and below'
1574         @echo  '  dir/file.[ois]  - Build spe    1603         @echo  '  dir/file.[ois]  - Build specified target only'
1575         @echo  '  dir/file.ll     - Build the    1604         @echo  '  dir/file.ll     - Build the LLVM assembly file'
1576         @echo  '                    (requires    1605         @echo  '                    (requires compiler support for LLVM assembly generation)'
1577         @echo  '  dir/file.lst    - Build spe    1606         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1578         @echo  '                    (requires    1607         @echo  '                    (requires a recent binutils and recent build (System.map))'
1579         @echo  '  dir/file.ko     - Build mod    1608         @echo  '  dir/file.ko     - Build module including final link'
1580         @echo  '  modules_prepare - Set up fo    1609         @echo  '  modules_prepare - Set up for building external modules'
1581         @echo  '  tags/TAGS       - Generate     1610         @echo  '  tags/TAGS       - Generate tags file for editors'
1582         @echo  '  cscope          - Generate     1611         @echo  '  cscope          - Generate cscope index'
1583         @echo  '  gtags           - Generate     1612         @echo  '  gtags           - Generate GNU GLOBAL index'
1584         @echo  '  kernelrelease   - Output th    1613         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
1585         @echo  '  kernelversion   - Output th    1614         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
1586         @echo  '  image_name      - Output th    1615         @echo  '  image_name      - Output the image name (use with make -s)'
1587         @echo  '  headers_install - Install s    1616         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588          echo  '                    (default:    1617          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1589          echo  ''                                1618          echo  ''
1590         @echo  'Static analysers:'               1619         @echo  'Static analysers:'
1591         @echo  '  checkstack      - Generate  !! 1620         @echo  '  checkstack      - Generate a list of stack hogs'
1592         @echo  '                    with a st << 
1593         @echo  '  versioncheck    - Sanity ch    1621         @echo  '  versioncheck    - Sanity check on version.h usage'
1594         @echo  '  includecheck    - Check for    1622         @echo  '  includecheck    - Check for duplicate included header files'
1595         @echo  '  export_report   - List the     1623         @echo  '  export_report   - List the usages of all exported symbols'
1596         @echo  '  headerdep       - Detect in    1624         @echo  '  headerdep       - Detect inclusion cycles in headers'
1597         @echo  '  coccicheck      - Check wit    1625         @echo  '  coccicheck      - Check with Coccinelle'
1598         @echo  '  clang-analyzer  - Check wit    1626         @echo  '  clang-analyzer  - Check with clang static analyzer'
1599         @echo  '  clang-tidy      - Check wit    1627         @echo  '  clang-tidy      - Check with clang-tidy'
1600         @echo  ''                                1628         @echo  ''
1601         @echo  'Tools:'                          1629         @echo  'Tools:'
1602         @echo  '  nsdeps          - Generate     1630         @echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1603         @echo  ''                                1631         @echo  ''
1604         @echo  'Kernel selftest:'                1632         @echo  'Kernel selftest:'
1605         @echo  '  kselftest         - Build a    1633         @echo  '  kselftest         - Build and run kernel selftest'
1606         @echo  '                      Build,     1634         @echo  '                      Build, install, and boot kernel before'
1607         @echo  '                      running    1635         @echo  '                      running kselftest on it'
1608         @echo  '                      Run as     1636         @echo  '                      Run as root for full coverage'
1609         @echo  '  kselftest-all     - Build k    1637         @echo  '  kselftest-all     - Build kernel selftest'
1610         @echo  '  kselftest-install - Build a    1638         @echo  '  kselftest-install - Build and install kernel selftest'
1611         @echo  '  kselftest-clean   - Remove     1639         @echo  '  kselftest-clean   - Remove all generated kselftest files'
1612         @echo  '  kselftest-merge   - Merge a    1640         @echo  '  kselftest-merge   - Merge all the config dependencies of'
1613         @echo  '                      kselfte    1641         @echo  '                      kselftest to existing .config.'
1614         @echo  ''                                1642         @echo  ''
1615         @echo  'Rust targets:'                << 
1616         @echo  '  rustavailable   - Checks wh << 
1617         @echo  '                    available << 
1618         @echo  '  rustfmt         - Reformat  << 
1619         @echo  '  rustfmtcheck    - Checks if << 
1620         @echo  '                    is format << 
1621         @echo  '  rustdoc         - Generate  << 
1622         @echo  '                    (requires << 
1623         @echo  '  rusttest        - Runs the  << 
1624         @echo  '                    (requires << 
1625         @echo  '  rust-analyzer   - Generate  << 
1626         @echo  '                    (requires << 
1627         @echo  '  dir/file.[os]   - Build spe << 
1628         @echo  '  dir/file.rsi    - Build mac << 
1629         @echo  '                    Run with  << 
1630         @echo  '                    The outpu << 
1631         @echo  '  dir/file.ll     - Build the << 
1632         @echo  ''                             << 
1633         @$(if $(dtstree), \                      1643         @$(if $(dtstree), \
1634                 echo 'Devicetree:'; \            1644                 echo 'Devicetree:'; \
1635                 echo '* dtbs               -  !! 1645                 echo '* dtbs             - Build device tree blobs for enabled boards'; \
1636                 echo '  dtbs_install       -  !! 1646                 echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1637                 echo '  dt_binding_check   -  !! 1647                 echo '  dt_binding_check - Validate device tree binding documents'; \
1638                 echo '  dt_binding_schema  -  !! 1648                 echo '  dtbs_check       - Validate device tree source files';\
1639                 echo '  dtbs_check         -  << 
1640                 echo '')                         1649                 echo '')
1641                                                  1650 
1642         @echo 'Userspace tools targets:'         1651         @echo 'Userspace tools targets:'
1643         @echo '  use "make tools/help"'          1652         @echo '  use "make tools/help"'
1644         @echo '  or  "cd tools; make help"'      1653         @echo '  or  "cd tools; make help"'
1645         @echo  ''                                1654         @echo  ''
1646         @echo  'Kernel packaging:'               1655         @echo  'Kernel packaging:'
1647         @$(MAKE) -f $(srctree)/scripts/Makefi    1656         @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1648         @echo  ''                                1657         @echo  ''
1649         @echo  'Documentation targets:'          1658         @echo  'Documentation targets:'
1650         @$(MAKE) -f $(srctree)/Documentation/    1659         @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1651         @echo  ''                                1660         @echo  ''
1652         @echo  'Architecture-specific targets !! 1661         @echo  'Architecture specific targets ($(SRCARCH)):'
1653         @$(or $(archhelp),\                   !! 1662         @$(if $(archhelp),$(archhelp),\
1654                 echo '  No architecture-speci !! 1663                 echo '  No architecture specific help defined for $(SRCARCH)')
1655         @echo  ''                                1664         @echo  ''
1656         @$(if $(boards), \                       1665         @$(if $(boards), \
1657                 $(foreach b, $(boards), \        1666                 $(foreach b, $(boards), \
1658                 printf "  %-27s - Build for %    1667                 printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659                 echo '')                         1668                 echo '')
1660         @$(if $(board-dirs), \                   1669         @$(if $(board-dirs), \
1661                 $(foreach b, $(board-dirs), \    1670                 $(foreach b, $(board-dirs), \
1662                 printf "  %-16s - Show %s-spe    1671                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663                 printf "  %-16s - Show all of    1672                 printf "  %-16s - Show all of the above\\n" help-boards; \
1664                 echo '')                         1673                 echo '')
1665                                                  1674 
1666         @echo  '  make V=n   [targets] 1: ver !! 1675         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667         @echo  '                       2: giv !! 1676         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1668         @echo  '                       V=1 an << 
1669         @echo  '  make O=dir [targets] Locate    1677         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1670         @echo  '  make C=1   [targets] Check     1678         @echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1671         @echo  '                       (spars    1679         @echo  '                       (sparse by default)'
1672         @echo  '  make C=2   [targets] Force     1680         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1673         @echo  '  make RECORDMCOUNT_WARN=1 [t    1681         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1674         @echo  '  make W=n   [targets] Enable !! 1682         @echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1675         @echo  '                1: warnings w    1683         @echo  '                1: warnings which may be relevant and do not occur too often'
1676         @echo  '                2: warnings w    1684         @echo  '                2: warnings which occur quite often but may still be relevant'
1677         @echo  '                3: more obscu    1685         @echo  '                3: more obscure warnings, can most likely be ignored'
1678         @echo  '                c: extra chec << 
1679         @echo  '                e: warnings a << 
1680         @echo  '                Multiple leve    1686         @echo  '                Multiple levels can be combined with W=12 or W=123'
1681         @$(if $(dtstree), \                   << 
1682                 echo '  make CHECK_DTBS=1 [ta << 
1683                 echo '         This can be ap << 
1684                 )                             << 
1685         @echo  ''                                1687         @echo  ''
1686         @echo  'Execute "make" or "make all"     1688         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1687         @echo  'For further info see the ./RE    1689         @echo  'For further info see the ./README file'
1688                                                  1690 
1689                                                  1691 
1690 help-board-dirs := $(addprefix help-,$(board-    1692 help-board-dirs := $(addprefix help-,$(board-dirs))
1691                                                  1693 
1692 help-boards: $(help-board-dirs)                  1694 help-boards: $(help-board-dirs)
1693                                                  1695 
1694 boards-per-dir = $(sort $(notdir $(wildcard $    1696 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1695                                                  1697 
1696 $(help-board-dirs): help-%:                      1698 $(help-board-dirs): help-%:
1697         @echo  'Architecture-specific targets !! 1699         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1698         @$(if $(boards-per-dir), \               1700         @$(if $(boards-per-dir), \
1699                 $(foreach b, $(boards-per-dir    1701                 $(foreach b, $(boards-per-dir), \
1700                 printf "  %-24s - Build for %    1702                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701                 echo '')                         1703                 echo '')
1702                                                  1704 
1703                                                  1705 
1704 # Documentation targets                          1706 # Documentation targets
1705 # -------------------------------------------    1707 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html    1708 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1707                linkcheckdocs dochelp refcheck !! 1709                linkcheckdocs dochelp refcheckdocs
1708 PHONY += $(DOC_TARGETS)                          1710 PHONY += $(DOC_TARGETS)
1709 $(DOC_TARGETS):                                  1711 $(DOC_TARGETS):
1710         $(Q)$(MAKE) $(build)=Documentation $@    1712         $(Q)$(MAKE) $(build)=Documentation $@
1711                                                  1713 
1712                                               << 
1713 # Rust targets                                << 
1714 # ------------------------------------------- << 
1715                                               << 
1716 # "Is Rust available?" target                 << 
1717 PHONY += rustavailable                        << 
1718 rustavailable:                                << 
1719         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1720                                               << 
1721 # Documentation target                        << 
1722 #                                             << 
1723 # Using the singular to avoid running afoul o << 
1724 PHONY += rustdoc                              << 
1725 rustdoc: prepare                              << 
1726         $(Q)$(MAKE) $(build)=rust $@          << 
1727                                               << 
1728 # Testing target                              << 
1729 PHONY += rusttest                             << 
1730 rusttest: prepare                             << 
1731         $(Q)$(MAKE) $(build)=rust $@          << 
1732                                               << 
1733 # Formatting targets                          << 
1734 PHONY += rustfmt rustfmtcheck                 << 
1735                                               << 
1736 # We skip `rust/alloc` since we want to minim << 
1737 #                                             << 
1738 # We match using absolute paths since `find`  << 
1739 # when matching, which is a problem when e.g. << 
1740 # We `grep` afterwards in order to remove the << 
1741 rustfmt:                                      << 
1742         $(Q)find $(abs_srctree) -type f -name << 
1743                 -o -path $(abs_srctree)/rust/ << 
1744                 -o -path $(abs_objtree)/rust/ << 
1745                 | grep -Fv $(abs_srctree)/rus << 
1746                 | grep -Fv $(abs_objtree)/rus << 
1747                 | grep -Fv generated \        << 
1748                 | xargs $(RUSTFMT) $(rustfmt_ << 
1749                                               << 
1750 rustfmtcheck: rustfmt_flags = --check         << 
1751 rustfmtcheck: rustfmt                         << 
1752                                               << 
1753 # Misc                                           1714 # Misc
1754 # -------------------------------------------    1715 # ---------------------------------------------------------------------------
1755                                                  1716 
1756 PHONY += misc-check                           << 
1757 misc-check:                                   << 
1758         $(Q)$(srctree)/scripts/misc-check     << 
1759                                               << 
1760 all: misc-check                               << 
1761                                               << 
1762 PHONY += scripts_gdb                             1717 PHONY += scripts_gdb
1763 scripts_gdb: prepare0                            1718 scripts_gdb: prepare0
1764         $(Q)$(MAKE) $(build)=scripts/gdb         1719         $(Q)$(MAKE) $(build)=scripts/gdb
1765         $(Q)ln -fsn $(abspath $(srctree)/scri    1720         $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1766                                                  1721 
1767 ifdef CONFIG_GDB_SCRIPTS                         1722 ifdef CONFIG_GDB_SCRIPTS
1768 all: scripts_gdb                                 1723 all: scripts_gdb
1769 endif                                            1724 endif
1770                                                  1725 
1771 else # KBUILD_EXTMOD                             1726 else # KBUILD_EXTMOD
1772                                                  1727 
1773 filechk_kernel.release = echo $(KERNELRELEASE << 
1774                                               << 
1775 ###                                              1728 ###
1776 # External module support.                       1729 # External module support.
1777 # When building external modules the kernel u    1730 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma    1731 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If     1732 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands     1733 # in the basis kernel ordinary make commands (without M=...) must be used.
1781                                                  1734 
1782 # We are always building only modules.           1735 # We are always building only modules.
1783 KBUILD_BUILTIN :=                                1736 KBUILD_BUILTIN :=
1784 KBUILD_MODULES := 1                              1737 KBUILD_MODULES := 1
1785                                                  1738 
1786 build-dir := $(KBUILD_EXTMOD)                 !! 1739 build-dirs := $(KBUILD_EXTMOD)
                                                   >> 1740 $(MODORDER): descend
                                                   >> 1741         @:
1787                                                  1742 
1788 compile_commands.json: $(extmod_prefix)compil    1743 compile_commands.json: $(extmod_prefix)compile_commands.json
1789 PHONY += compile_commands.json                   1744 PHONY += compile_commands.json
1790                                                  1745 
1791 clean-dirs := $(KBUILD_EXTMOD)                   1746 clean-dirs := $(KBUILD_EXTMOD)
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1747 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1793         $(KBUILD_EXTMOD)/compile_commands.jso !! 1748         $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
1794                                               << 
1795 PHONY += prepare                              << 
1796 # now expand this into a simple variable to r << 
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT << 
1798 prepare:                                      << 
1799         @if [ "$(CC_VERSION_TEXT)" != "$(CONF << 
1800                 echo >&2 "warning: the compil << 
1801                 echo >&2 "  The kernel was bu << 
1802                 echo >&2 "  You are using:    << 
1803         fi                                    << 
1804                                                  1749 
1805 PHONY += help                                    1750 PHONY += help
1806 help:                                            1751 help:
1807         @echo  '  Building external modules.'    1752         @echo  '  Building external modules.'
1808         @echo  '  Syntax: make -C path/to/ker    1753         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1809         @echo  ''                                1754         @echo  ''
1810         @echo  '  modules         - default t    1755         @echo  '  modules         - default target, build the module(s)'
1811         @echo  '  modules_install - install t    1756         @echo  '  modules_install - install the module'
1812         @echo  '  clean           - remove ge    1757         @echo  '  clean           - remove generated files in module directory only'
1813         @echo  '  rust-analyzer   - generate  << 
1814         @echo  ''                                1758         @echo  ''
1815                                                  1759 
1816 ifndef CONFIG_MODULES                         !! 1760 # no-op for external module builds
1817 modules modules_install: __external_modules_e !! 1761 PHONY += prepare modules_prepare
1818 __external_modules_error:                     << 
1819         @echo >&2 '***'                       << 
1820         @echo >&2 '*** The present kernel dis << 
1821         @echo >&2 '*** You cannot build or in << 
1822         @echo >&2 '***'                       << 
1823         @false                                << 
1824 endif                                         << 
1825                                                  1762 
1826 endif # KBUILD_EXTMOD                            1763 endif # KBUILD_EXTMOD
1827                                                  1764 
1828 # -------------------------------------------    1765 # ---------------------------------------------------------------------------
1829 # Modules                                        1766 # Modules
1830                                                  1767 
1831 PHONY += modules modules_install modules_sign !! 1768 PHONY += modules modules_install
1832                                               << 
1833 modules_install:                              << 
1834         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1835         sign-only=$(if $(filter modules_insta << 
1836                                               << 
1837 ifeq ($(CONFIG_MODULE_SIG),y)                 << 
1838 # modules_sign is a subset of modules_install << 
1839 # 'make modules_install modules_sign' is equi << 
1840 modules_sign: modules_install                 << 
1841         @:                                    << 
1842 else                                          << 
1843 modules_sign:                                 << 
1844         @echo >&2 '***'                       << 
1845         @echo >&2 '*** CONFIG_MODULE_SIG is d << 
1846         @echo >&2 '***'                       << 
1847         @false                                << 
1848 endif                                         << 
1849                                                  1769 
1850 ifdef CONFIG_MODULES                             1770 ifdef CONFIG_MODULES
1851                                                  1771 
1852 $(MODORDER): $(build-dir)                     !! 1772 modules: modules_check
1853         @:                                    !! 1773         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1854                                               << 
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t << 
1856 # This is solely useful to speed up test comp << 
1857 modules: modpost                              << 
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1859         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1860 endif                                         << 
1861                                                  1774 
1862 PHONY += modules_check                           1775 PHONY += modules_check
1863 modules_check: $(MODORDER)                       1776 modules_check: $(MODORDER)
1864         $(Q)$(CONFIG_SHELL) $(srctree)/script    1777         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1865                                                  1778 
                                                   >> 1779 quiet_cmd_depmod = DEPMOD  $(MODLIB)
                                                   >> 1780       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
                                                   >> 1781                    $(KERNELRELEASE)
                                                   >> 1782 
                                                   >> 1783 modules_install:
                                                   >> 1784         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1785         $(call cmd,depmod)
                                                   >> 1786 
1866 else # CONFIG_MODULES                            1787 else # CONFIG_MODULES
1867                                                  1788 
1868 modules:                                      !! 1789 # Modules not configured
1869         @:                                    !! 1790 # ---------------------------------------------------------------------------
1870                                                  1791 
1871 KBUILD_MODULES :=                             !! 1792 modules modules_install:
                                                   >> 1793         @echo >&2 '***'
                                                   >> 1794         @echo >&2 '*** The present kernel configuration has modules disabled.'
                                                   >> 1795         @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
                                                   >> 1796         @echo >&2 '*** to enable CONFIG_MODULES.'
                                                   >> 1797         @echo >&2 '***'
                                                   >> 1798         @exit 1
1872                                                  1799 
1873 endif # CONFIG_MODULES                           1800 endif # CONFIG_MODULES
1874                                                  1801 
1875 PHONY += modpost                              << 
1876 modpost: $(if $(single-build),, $(if $(KBUILD << 
1877          $(if $(KBUILD_MODULES), modules_chec << 
1878         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1879                                               << 
1880 # Single targets                                 1802 # Single targets
1881 # -------------------------------------------    1803 # ---------------------------------------------------------------------------
1882 # To build individual files in subdirectories    1804 # To build individual files in subdirectories, you can do like this:
1883 #                                                1805 #
1884 #   make foo/bar/baz.s                           1806 #   make foo/bar/baz.s
1885 #                                                1807 #
1886 # The supported suffixes for single-target ar    1808 # The supported suffixes for single-target are listed in 'single-targets'
1887 #                                                1809 #
1888 # To build only under specific subdirectories    1810 # To build only under specific subdirectories, you can do like this:
1889 #                                                1811 #
1890 #   make foo/bar/baz/                            1812 #   make foo/bar/baz/
1891                                                  1813 
1892 ifdef single-build                               1814 ifdef single-build
1893                                                  1815 
1894 # .ko is special because modpost is needed       1816 # .ko is special because modpost is needed
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG    1817 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1896 single-no-ko := $(filter-out $(single-ko), $( !! 1818 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1897                 $(foreach x, o mod, $(patsubs << 
1898                                                  1819 
1899 $(single-ko): single_modules                  !! 1820 $(single-ko): single_modpost
1900         @:                                       1821         @:
1901 $(single-no-ko): $(build-dir)                 !! 1822 $(single-no-ko): descend
1902         @:                                       1823         @:
1903                                                  1824 
1904 # Remove MODORDER when done because it is not !! 1825 ifeq ($(KBUILD_EXTMOD),)
1905 PHONY += single_modules                       !! 1826 # For the single build of in-tree modules, use a temporary file to avoid
1906 single_modules: $(single-no-ko) modules_prepa !! 1827 # the situation of modules_install installing an invalid modules.order.
1907         $(Q){ $(foreach m, $(single-ko), echo !! 1828 MODORDER := .modules.tmp
1908         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1910         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1911 endif                                            1829 endif
1912         $(Q)rm -f $(MODORDER)                 << 
1913                                                  1830 
1914 single-goals := $(addprefix $(build-dir)/, $( !! 1831 PHONY += single_modpost
                                                   >> 1832 single_modpost: $(single-no-ko) modules_prepare
                                                   >> 1833         $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
                                                   >> 1834         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1915                                                  1835 
1916 KBUILD_MODULES := 1                              1836 KBUILD_MODULES := 1
1917                                                  1837 
                                                   >> 1838 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
                                                   >> 1839 
                                                   >> 1840 # trim unrelated directories
                                                   >> 1841 build-dirs := $(foreach d, $(build-dirs), \
                                                   >> 1842                         $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
                                                   >> 1843 
1918 endif                                            1844 endif
1919                                                  1845 
                                                   >> 1846 ifndef CONFIG_MODULES
                                                   >> 1847 KBUILD_MODULES :=
                                                   >> 1848 endif
                                                   >> 1849 
                                                   >> 1850 # Handle descending into subdirectories listed in $(build-dirs)
1920 # Preset locale variables to speed up the bui    1851 # Preset locale variables to speed up the build process. Limit locale
1921 # tweaks to this spot to avoid wrong language    1852 # tweaks to this spot to avoid wrong language settings when running
1922 # make menuconfig etc.                           1853 # make menuconfig etc.
1923 # Error messages still appears in the origina    1854 # Error messages still appears in the original language
1924 PHONY += $(build-dir)                         !! 1855 PHONY += descend $(build-dirs)
1925 $(build-dir): prepare                         !! 1856 descend: $(build-dirs)
1926         $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1857 $(build-dirs): prepare
                                                   >> 1858         $(Q)$(MAKE) $(build)=$@ \
                                                   >> 1859         single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
                                                   >> 1860         need-builtin=1 need-modorder=1
1927                                                  1861 
1928 clean-dirs := $(addprefix _clean_, $(clean-di    1862 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1929 PHONY += $(clean-dirs) clean                     1863 PHONY += $(clean-dirs) clean
1930 $(clean-dirs):                                   1864 $(clean-dirs):
1931         $(Q)$(MAKE) $(clean)=$(patsubst _clea    1865         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1932                                                  1866 
1933 clean: $(clean-dirs)                             1867 clean: $(clean-dirs)
1934         $(call cmd,rmfiles)                      1868         $(call cmd,rmfiles)
1935         @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1869         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1936                 \( -name '*.[aios]' -o -name  !! 1870                 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1937                 -o -name '*.ko.*' \              1871                 -o -name '*.ko.*' \
1938                 -o -name '*.dtb' -o -name '*. !! 1872                 -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1939                 -o -name '*.dtb.S' -o -name ' << 
1940                 -o -name '*.dt.yaml' -o -name << 
1941                 -o -name '*.dwo' -o -name '*.    1873                 -o -name '*.dwo' -o -name '*.lst' \
1942                 -o -name '*.su' -o -name '*.m    1874                 -o -name '*.su' -o -name '*.mod' \
1943                 -o -name '.*.d' -o -name '.*.    1875                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1944                 -o -name '*.lex.c' -o -name '    1876                 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1945                 -o -name '*.asn1.[ch]' \         1877                 -o -name '*.asn1.[ch]' \
1946                 -o -name '*.symtypes' -o -nam    1878                 -o -name '*.symtypes' -o -name 'modules.order' \
                                                   >> 1879                 -o -name '.tmp_*.o.*' \
1947                 -o -name '*.c.[012]*.*' \        1880                 -o -name '*.c.[012]*.*' \
1948                 -o -name '*.ll' \                1881                 -o -name '*.ll' \
1949                 -o -name '*.gcno' \              1882                 -o -name '*.gcno' \
1950                 -o -name '*.*.symversions' \) !! 1883                 -o -name '*.*.symversions' \) -type f -print | xargs rm -f
1951                 -o -name '.tmp_*' -print \    << 
1952                 | xargs rm -rf                << 
1953                                                  1884 
1954 # Generate tags for editors                      1885 # Generate tags for editors
1955 # -------------------------------------------    1886 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN     $@                      1887 quiet_cmd_tags = GEN     $@
1957       cmd_tags = $(BASH) $(srctree)/scripts/t    1888       cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1958                                                  1889 
1959 tags TAGS cscope gtags: FORCE                    1890 tags TAGS cscope gtags: FORCE
1960         $(call cmd,tags)                         1891         $(call cmd,tags)
1961                                                  1892 
1962 # Generate rust-project.json (a file that des << 
1963 # Rust projects) for rust-analyzer (an implem << 
1964 # Protocol).                                  << 
1965 PHONY += rust-analyzer                        << 
1966 rust-analyzer:                                << 
1967         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1968         $(Q)$(MAKE) $(build)=rust $@          << 
1969                                               << 
1970 # Script to generate missing namespace depend    1893 # Script to generate missing namespace dependencies
1971 # -------------------------------------------    1894 # ---------------------------------------------------------------------------
1972                                                  1895 
1973 PHONY += nsdeps                                  1896 PHONY += nsdeps
1974 nsdeps: export KBUILD_NSDEPS=1                   1897 nsdeps: export KBUILD_NSDEPS=1
1975 nsdeps: modules                                  1898 nsdeps: modules
1976         $(Q)$(CONFIG_SHELL) $(srctree)/script    1899         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1977                                                  1900 
1978 # Clang Tooling                                  1901 # Clang Tooling
1979 # -------------------------------------------    1902 # ---------------------------------------------------------------------------
1980                                                  1903 
1981 quiet_cmd_gen_compile_commands = GEN     $@      1904 quiet_cmd_gen_compile_commands = GEN     $@
1982       cmd_gen_compile_commands = $(PYTHON3) $    1905       cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1983                                                  1906 
1984 $(extmod_prefix)compile_commands.json: $(srct !! 1907 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1985         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K !! 1908         $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
1986         $(if $(CONFIG_MODULES), $(MODORDER))     1909         $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1987         $(call if_changed,gen_compile_command    1910         $(call if_changed,gen_compile_commands)
1988                                                  1911 
1989 targets += $(extmod_prefix)compile_commands.j    1912 targets += $(extmod_prefix)compile_commands.json
1990                                                  1913 
1991 PHONY += clang-tidy clang-analyzer               1914 PHONY += clang-tidy clang-analyzer
1992                                                  1915 
1993 ifdef CONFIG_CC_IS_CLANG                         1916 ifdef CONFIG_CC_IS_CLANG
1994 quiet_cmd_clang_tools = CHECK   $<               1917 quiet_cmd_clang_tools = CHECK   $<
1995       cmd_clang_tools = $(PYTHON3) $(srctree)    1918       cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1996                                                  1919 
1997 clang-tidy clang-analyzer: $(extmod_prefix)co    1920 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
1998         $(call cmd,clang_tools)                  1921         $(call cmd,clang_tools)
1999 else                                             1922 else
2000 clang-tidy clang-analyzer:                       1923 clang-tidy clang-analyzer:
2001         @echo "$@ requires CC=clang" >&2         1924         @echo "$@ requires CC=clang" >&2
2002         @false                                   1925         @false
2003 endif                                            1926 endif
2004                                                  1927 
2005 # Scripts to check various things for consist    1928 # Scripts to check various things for consistency
2006 # -------------------------------------------    1929 # ---------------------------------------------------------------------------
2007                                                  1930 
2008 PHONY += includecheck versioncheck coccicheck    1931 PHONY += includecheck versioncheck coccicheck export_report
2009                                                  1932 
2010 includecheck:                                    1933 includecheck:
2011         find $(srctree)/* $(RCS_FIND_IGNORE)     1934         find $(srctree)/* $(RCS_FIND_IGNORE) \
2012                 -name '*.[hcS]' -type f -prin    1935                 -name '*.[hcS]' -type f -print | sort \
2013                 | xargs $(PERL) -w $(srctree)    1936                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014                                                  1937 
2015 versioncheck:                                    1938 versioncheck:
2016         find $(srctree)/* $(RCS_FIND_IGNORE)     1939         find $(srctree)/* $(RCS_FIND_IGNORE) \
2017                 -name '*.[hcS]' -type f -prin    1940                 -name '*.[hcS]' -type f -print | sort \
2018                 | xargs $(PERL) -w $(srctree)    1941                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019                                                  1942 
2020 coccicheck:                                      1943 coccicheck:
2021         $(Q)$(BASH) $(srctree)/scripts/$@        1944         $(Q)$(BASH) $(srctree)/scripts/$@
2022                                                  1945 
2023 export_report:                                   1946 export_report:
2024         $(PERL) $(srctree)/scripts/export_rep    1947         $(PERL) $(srctree)/scripts/export_report.pl
2025                                                  1948 
2026 PHONY += checkstack kernelrelease kernelversi    1949 PHONY += checkstack kernelrelease kernelversion image_name
2027                                                  1950 
2028 # UML needs a little special treatment here.     1951 # UML needs a little special treatment here.  It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch    1952 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2030 # else wants $(ARCH), including people doing     1953 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here.             1954 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um)                               1955 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH)                    1956 CHECKSTACK_ARCH := $(SUBARCH)
2034 else                                             1957 else
2035 CHECKSTACK_ARCH := $(ARCH)                       1958 CHECKSTACK_ARCH := $(ARCH)
2036 endif                                            1959 endif
2037 MINSTACKSIZE    ?= 100                        << 
2038 checkstack:                                      1960 checkstack:
2039         $(OBJDUMP) -d vmlinux $$(find . -name    1961         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040         $(PERL) $(srctree)/scripts/checkstack !! 1962         $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041                                                  1963 
2042 kernelrelease:                                   1964 kernelrelease:
2043         @$(filechk_kernel.release)            !! 1965         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2044                                                  1966 
2045 kernelversion:                                   1967 kernelversion:
2046         @echo $(KERNELVERSION)                   1968         @echo $(KERNELVERSION)
2047                                                  1969 
2048 image_name:                                      1970 image_name:
2049         @echo $(KBUILD_IMAGE)                    1971         @echo $(KBUILD_IMAGE)
2050                                               << 
2051 PHONY += run-command                          << 
2052 run-command:                                  << 
2053         $(Q)$(KBUILD_RUN_COMMAND)             << 
2054                                                  1972 
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    1973 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
2056       cmd_rmfiles = rm -rf $(rm-files)           1974       cmd_rmfiles = rm -rf $(rm-files)
2057                                                  1975 
2058 # read saved command lines for existing targe    1976 # read saved command lines for existing targets
2059 existing-targets := $(wildcard $(sort $(targe    1977 existing-targets := $(wildcard $(sort $(targets)))
2060                                                  1978 
2061 -include $(foreach f,$(existing-targets),$(di    1979 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2062                                                  1980 
2063 endif # config-build                             1981 endif # config-build
2064 endif # mixed-build                              1982 endif # mixed-build
2065 endif # need-sub-make                            1983 endif # need-sub-make
2066                                                  1984 
2067 PHONY += FORCE                                   1985 PHONY += FORCE
2068 FORCE:                                           1986 FORCE:
2069                                                  1987 
2070 # Declare the contents of the PHONY variable     1988 # Declare the contents of the PHONY variable as phony.  We keep that
2071 # information in a variable so we can use it     1989 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY)                                 1990 .PHONY: $(PHONY)
                                                      

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