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TOMOYO Linux Cross Reference
Linux/Makefile

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

Diff markup

Differences between /Makefile (Version linux-6.12-rc7) and /Makefile (Version linux-5.4.285)


  1 # SPDX-License-Identifier: GPL-2.0                  1 # SPDX-License-Identifier: GPL-2.0
  2 VERSION = 6                                    !!   2 VERSION = 5
  3 PATCHLEVEL = 12                                !!   3 PATCHLEVEL = 4
  4 SUBLEVEL = 0                                   !!   4 SUBLEVEL = 285
  5 EXTRAVERSION = -rc7                            !!   5 EXTRAVERSION =
  6 NAME = Baby Opossum Posse                      !!   6 NAME = Kleptomaniac Octopus
  7                                                     7 
  8 # *DOCUMENTATION*                                   8 # *DOCUMENTATION*
  9 # To see a list of typical targets execute "ma      9 # To see a list of typical targets execute "make help"
 10 # More info can be located in ./README             10 # More info can be located in ./README
 11 # Comments in this file are targeted only to t     11 # Comments in this file are targeted only to the developer, do not
 12 # expect to learn how to build the kernel read     12 # expect to learn how to build the kernel reading this file.
 13                                                    13 
 14 ifeq ($(filter output-sync,$(.FEATURES)),)     << 
 15 $(error GNU Make >= 4.0 is required. Your Make << 
 16 endif                                          << 
 17                                                << 
 18 $(if $(filter __%, $(MAKECMDGOALS)), \         << 
 19         $(error targets prefixed with '__' are << 
 20                                                << 
 21 # That's our default target when none is given     14 # That's our default target when none is given on the command line
 22 PHONY := __all                                 !!  15 PHONY := _all
 23 __all:                                         !!  16 _all:
 24                                                    17 
 25 # We are using a recursive build, so we need t     18 # We are using a recursive build, so we need to do a little thinking
 26 # to get the ordering right.                       19 # to get the ordering right.
 27 #                                                  20 #
 28 # Most importantly: sub-Makefiles should only      21 # Most importantly: sub-Makefiles should only ever modify files in
 29 # their own directory. If in some directory we     22 # their own directory. If in some directory we have a dependency on
 30 # a file in another dir (which doesn't happen      23 # a file in another dir (which doesn't happen often, but it's often
 31 # unavoidable when linking the built-in.a targ     24 # unavoidable when linking the built-in.a targets which finally
 32 # turn into vmlinux), we will call a sub make      25 # turn into vmlinux), we will call a sub make in that other dir, and
 33 # after that we are sure that everything which     26 # after that we are sure that everything which is in that other dir
 34 # is now up to date.                               27 # is now up to date.
 35 #                                                  28 #
 36 # The only cases where we need to modify files     29 # The only cases where we need to modify files which have global
 37 # effects are thus separated out and done befo     30 # effects are thus separated out and done before the recursive
 38 # descending is started. They are now explicit     31 # descending is started. They are now explicitly listed as the
 39 # prepare rule.                                    32 # prepare rule.
 40                                                    33 
 41 this-makefile := $(lastword $(MAKEFILE_LIST))  << 
 42 abs_srctree := $(realpath $(dir $(this-makefil << 
 43 abs_objtree := $(CURDIR)                       << 
 44                                                << 
 45 ifneq ($(sub_make_done),1)                         34 ifneq ($(sub_make_done),1)
 46                                                    35 
 47 # Do not use make's built-in rules and variabl     36 # Do not use make's built-in rules and variables
 48 # (this increases performance and avoids hard-     37 # (this increases performance and avoids hard-to-debug behaviour)
 49 MAKEFLAGS += -rR                                   38 MAKEFLAGS += -rR
 50                                                    39 
 51 # Avoid funny character set dependencies           40 # Avoid funny character set dependencies
 52 unexport LC_ALL                                    41 unexport LC_ALL
 53 LC_COLLATE=C                                       42 LC_COLLATE=C
 54 LC_NUMERIC=C                                       43 LC_NUMERIC=C
 55 export LC_COLLATE LC_NUMERIC                       44 export LC_COLLATE LC_NUMERIC
 56                                                    45 
 57 # Avoid interference with shell env settings       46 # Avoid interference with shell env settings
 58 unexport GREP_OPTIONS                              47 unexport GREP_OPTIONS
 59                                                    48 
 60 # Beautify output                                  49 # Beautify output
 61 # --------------------------------------------     50 # ---------------------------------------------------------------------------
 62 #                                                  51 #
 63 # Most of build commands in Kbuild start with  !!  52 # Normally, we echo the whole command before executing it. By making
 64 # "quiet_cmd_*". If defined, the short log is  !!  53 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 65 # that command is printed by default.          !!  54 # $(quiet) to choose other forms of output instead, e.g.
 66 #                                              !!  55 #
 67 # e.g.)                                        !!  56 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)      !!  57 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 69 #          cmd_depmod = $(srctree)/scripts/dep !!  58 #
                                                   >>  59 # If $(quiet) is empty, the whole command will be printed.
                                                   >>  60 # If it is set to "quiet_", only the short version will be printed.
                                                   >>  61 # If it is set to "silent_", nothing will be printed at all, since
                                                   >>  62 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 70 #                                                  63 #
 71 # A simple variant is to prefix commands with      64 # A simple variant is to prefix commands with $(Q) - that's useful
 72 # for commands that shall be hidden in non-ver     65 # for commands that shall be hidden in non-verbose mode.
 73 #                                                  66 #
 74 #    $(Q)$(MAKE) $(build)=scripts/basic        !!  67 #       $(Q)ln $@ :<
 75 #                                                  68 #
 76 # If KBUILD_VERBOSE contains 1, the whole comm !!  69 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 77 # If KBUILD_VERBOSE contains 2, the reason for !!  70 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 78 #                                                  71 #
 79 # To put more focus on warnings, be less verbo     72 # To put more focus on warnings, be less verbose as default
 80 # Use 'make V=1' to see the full commands          73 # Use 'make V=1' to see the full commands
 81                                                    74 
 82 ifeq ("$(origin V)", "command line")               75 ifeq ("$(origin V)", "command line")
 83   KBUILD_VERBOSE = $(V)                            76   KBUILD_VERBOSE = $(V)
 84 endif                                              77 endif
                                                   >>  78 ifndef KBUILD_VERBOSE
                                                   >>  79   KBUILD_VERBOSE = 0
                                                   >>  80 endif
 85                                                    81 
 86 quiet = quiet_                                 !!  82 ifeq ($(KBUILD_VERBOSE),1)
 87 Q = @                                          << 
 88                                                << 
 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)    << 
 90   quiet =                                          83   quiet =
 91   Q =                                              84   Q =
                                                   >>  85 else
                                                   >>  86   quiet=quiet_
                                                   >>  87   Q = @
 92 endif                                              88 endif
 93                                                    89 
 94 # If the user is running make -s (silent mode)     90 # If the user is running make -s (silent mode), suppress echoing of
 95 # commands                                         91 # commands
 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS !!  92 # make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
 97 quiet=silent_                                  << 
 98 override KBUILD_VERBOSE :=                     << 
 99 endif                                          << 
100                                                << 
101 export quiet Q KBUILD_VERBOSE                  << 
102                                                << 
103 # Call a source code checker (by default, "spa << 
104 # C compilation.                               << 
105 #                                              << 
106 # Use 'make C=1' to enable checking of only re << 
107 # Use 'make C=2' to enable checking of *all* s << 
108 # of whether they are re-compiled or not.      << 
109 #                                              << 
110 # See the file "Documentation/dev-tools/sparse << 
111 # including where to get the "sparse" utility. << 
112                                                << 
113 ifeq ("$(origin C)", "command line")           << 
114   KBUILD_CHECKSRC = $(C)                       << 
115 endif                                          << 
116 ifndef KBUILD_CHECKSRC                         << 
117   KBUILD_CHECKSRC = 0                          << 
118 endif                                          << 
119                                                    93 
120 export KBUILD_CHECKSRC                         !!  94 ifeq ($(filter 3.%,$(MAKE_VERSION)),)
121                                                !!  95 silence:=$(findstring s,$(firstword -$(MAKEFLAGS)))
122 # Enable "clippy" (a linter) as part of the Ru !!  96 else
123 #                                              !!  97 silence:=$(findstring s,$(filter-out --%,$(MAKEFLAGS)))
124 # Use 'make CLIPPY=1' to enable it.            << 
125 ifeq ("$(origin CLIPPY)", "command line")      << 
126   KBUILD_CLIPPY := $(CLIPPY)                   << 
127 endif                                          << 
128                                                << 
129 export KBUILD_CLIPPY                           << 
130                                                << 
131 # Use make M=dir or set the environment variab << 
132 # directory of external module to build. Setti << 
133 ifeq ("$(origin M)", "command line")           << 
134   KBUILD_EXTMOD := $(M)                        << 
135 endif                                          << 
136                                                << 
137 $(if $(word 2, $(KBUILD_EXTMOD)), \            << 
138         $(error building multiple external mod << 
139                                                << 
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI << 
141         $(error module directory path cannot c << 
142                                                << 
143 # Remove trailing slashes                      << 
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)        << 
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM << 
146 endif                                              98 endif
147                                                    99 
148 export KBUILD_EXTMOD                           !! 100 ifeq ($(silence),s)
149                                                !! 101 quiet=silent_
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                                             102 endif
156                                                   103 
157 export KBUILD_EXTRA_WARN                       !! 104 export quiet Q KBUILD_VERBOSE
158                                                   105 
159 # Kbuild will save output files in the current    106 # Kbuild will save output files in the current working directory.
160 # This does not need to match to the root of t    107 # This does not need to match to the root of the kernel source tree.
161 #                                                 108 #
162 # For example, you can do this:                   109 # For example, you can do this:
163 #                                                 110 #
164 #  cd /dir/to/store/output/files; make -f /dir    111 #  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
165 #                                                 112 #
166 # If you want to save output files in a differ    113 # If you want to save output files in a different location, there are
167 # two syntaxes to specify it.                     114 # two syntaxes to specify it.
168 #                                                 115 #
169 # 1) O=                                           116 # 1) O=
170 # Use "make O=dir/to/store/output/files/"         117 # Use "make O=dir/to/store/output/files/"
171 #                                                 118 #
172 # 2) Set KBUILD_OUTPUT                            119 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t    120 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
174 # export KBUILD_OUTPUT=dir/to/store/output/fil    121 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
175 #                                                 122 #
176 # The O= assignment takes precedence over the     123 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable.                                       124 # variable.
178                                                   125 
179 # Do we want to change the working directory?     126 # Do we want to change the working directory?
180 ifeq ("$(origin O)", "command line")              127 ifeq ("$(origin O)", "command line")
181   KBUILD_OUTPUT := $(O)                           128   KBUILD_OUTPUT := $(O)
182 endif                                             129 endif
183                                                   130 
184 ifneq ($(KBUILD_OUTPUT),)                         131 ifneq ($(KBUILD_OUTPUT),)
185 # $(realpath ...) gets empty if the path does  !! 132 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")           !! 133 # expand a shell special character '~'. We use a somewhat tedious way here.
                                                   >> 134 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
                                                   >> 135 $(if $(abs_objtree),, \
                                                   >> 136      $(error failed to create output directory "$(KBUILD_OUTPUT)"))
                                                   >> 137 
187 # $(realpath ...) resolves symlinks               138 # $(realpath ...) resolves symlinks
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))    !! 139 abs_objtree := $(realpath $(abs_objtree))
189 $(if $(abs_objtree),,$(error failed to create  !! 140 else
                                                   >> 141 abs_objtree := $(CURDIR)
190 endif # ifneq ($(KBUILD_OUTPUT),)                 142 endif # ifneq ($(KBUILD_OUTPUT),)
191                                                   143 
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 !! 144 ifeq ($(abs_objtree),$(CURDIR))
193 $(error source directory cannot contain spaces !! 145 # Suppress "Entering directory ..." unless we are changing the work directory.
                                                   >> 146 MAKEFLAGS += --no-print-directory
                                                   >> 147 else
                                                   >> 148 need-sub-make := 1
194 endif                                             149 endif
195                                                   150 
196 export sub_make_done := 1                      !! 151 abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
197                                                   152 
198 endif # sub_make_done                          !! 153 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
                                                   >> 154 $(error source directory cannot contain spaces or colons)
                                                   >> 155 endif
199                                                   156 
200 ifeq ($(abs_objtree),$(CURDIR))                !! 157 ifneq ($(abs_srctree),$(abs_objtree))
201 # Suppress "Entering directory ..." if we are  !! 158 # Look for make include files relative to root of kernel src
202 no-print-directory := --no-print-directory     !! 159 #
203 else                                           !! 160 # This does not become effective immediately because MAKEFLAGS is re-parsed
204 # Recursion to show "Entering directory ..."   !! 161 # once after the Makefile is read. We need to invoke sub-make.
                                                   >> 162 MAKEFLAGS += --include-dir=$(abs_srctree)
205 need-sub-make := 1                                163 need-sub-make := 1
206 endif                                             164 endif
207                                                   165 
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !! 166 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
209 # If --no-print-directory is unset, recurse on !! 167 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
210 # You may end up recursing into __sub-make twi !! 168 # 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                                169 need-sub-make := 1
                                                   >> 170 # Cancel implicit rules for this Makefile.
                                                   >> 171 $(lastword $(MAKEFILE_LIST)): ;
213 endif                                             172 endif
214                                                   173 
                                                   >> 174 export abs_srctree abs_objtree
                                                   >> 175 export sub_make_done := 1
                                                   >> 176 
215 ifeq ($(need-sub-make),1)                         177 ifeq ($(need-sub-make),1)
216                                                   178 
217 PHONY += $(MAKECMDGOALS) __sub-make            !! 179 PHONY += $(MAKECMDGOALS) sub-make
218                                                   180 
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 181 $(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
220         @:                                        182         @:
221                                                   183 
222 # Invoke a second make in the output directory    184 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make:                                    !! 185 sub-make:
224         $(Q)$(MAKE) $(no-print-directory) -C $ !! 186         $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
225         -f $(abs_srctree)/Makefile $(MAKECMDGO << 
226                                                   187 
227 else # need-sub-make                           !! 188 endif # need-sub-make
                                                   >> 189 endif # sub_make_done
228                                                   190 
229 # We process the rest of the Makefile if this     191 # We process the rest of the Makefile if this is the final invocation of make
                                                   >> 192 ifeq ($(need-sub-make),)
                                                   >> 193 
                                                   >> 194 # Do not print "Entering directory ...",
                                                   >> 195 # but we want to display it when entering to the output directory
                                                   >> 196 # so that IDEs/editors are able to understand relative filenames.
                                                   >> 197 MAKEFLAGS += --no-print-directory
                                                   >> 198 
                                                   >> 199 # Call a source code checker (by default, "sparse") as part of the
                                                   >> 200 # C compilation.
                                                   >> 201 #
                                                   >> 202 # Use 'make C=1' to enable checking of only re-compiled files.
                                                   >> 203 # Use 'make C=2' to enable checking of *all* source files, regardless
                                                   >> 204 # of whether they are re-compiled or not.
                                                   >> 205 #
                                                   >> 206 # See the file "Documentation/dev-tools/sparse.rst" for more details,
                                                   >> 207 # including where to get the "sparse" utility.
                                                   >> 208 
                                                   >> 209 ifeq ("$(origin C)", "command line")
                                                   >> 210   KBUILD_CHECKSRC = $(C)
                                                   >> 211 endif
                                                   >> 212 ifndef KBUILD_CHECKSRC
                                                   >> 213   KBUILD_CHECKSRC = 0
                                                   >> 214 endif
                                                   >> 215 
                                                   >> 216 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
                                                   >> 217 # directory of external module to build. Setting M= takes precedence.
                                                   >> 218 ifeq ("$(origin M)", "command line")
                                                   >> 219   KBUILD_EXTMOD := $(M)
                                                   >> 220 endif
                                                   >> 221 
                                                   >> 222 export KBUILD_CHECKSRC KBUILD_EXTMOD
                                                   >> 223 
                                                   >> 224 extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
230                                                   225 
231 ifeq ($(abs_srctree),$(abs_objtree))              226 ifeq ($(abs_srctree),$(abs_objtree))
232         # building in the source tree             227         # building in the source tree
233         srctree := .                              228         srctree := .
234         building_out_of_srctree :=                229         building_out_of_srctree :=
235 else                                              230 else
236         ifeq ($(abs_srctree)/,$(dir $(abs_objt    231         ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
237                 # building in a subdirectory o    232                 # building in a subdirectory of the source tree
238                 srctree := ..                     233                 srctree := ..
239         else                                      234         else
240                 srctree := $(abs_srctree)         235                 srctree := $(abs_srctree)
241         endif                                     236         endif
242         building_out_of_srctree := 1              237         building_out_of_srctree := 1
243 endif                                             238 endif
244                                                   239 
245 ifneq ($(KBUILD_ABS_SRCTREE),)                    240 ifneq ($(KBUILD_ABS_SRCTREE),)
246 srctree := $(abs_srctree)                         241 srctree := $(abs_srctree)
247 endif                                             242 endif
248                                                   243 
249 objtree         := .                              244 objtree         := .
250                                                << 
251 VPATH           :=                             << 
252                                                << 
253 ifeq ($(KBUILD_EXTMOD),)                       << 
254 ifdef building_out_of_srctree                  << 
255 VPATH           := $(srctree)                     245 VPATH           := $(srctree)
256 endif                                          << 
257 endif                                          << 
258                                                   246 
259 export building_out_of_srctree srctree objtree    247 export building_out_of_srctree srctree objtree VPATH
260                                                   248 
261 # To make sure we do not include .config for a    249 # To make sure we do not include .config for any of the *config targets
262 # catch them early, and hand them over to scri    250 # catch them early, and hand them over to scripts/kconfig/Makefile
263 # It is allowed to specify more targets when c    251 # It is allowed to specify more targets when calling make, including
264 # mixing *config targets and build targets.       252 # mixing *config targets and build targets.
265 # For example 'make oldconfig all'.               253 # For example 'make oldconfig all'.
266 # Detect when mixed targets is specified, and     254 # Detect when mixed targets is specified, and make a second invocation
267 # of make so .config is not included in this c    255 # of make so .config is not included in this case either (for *config).
268                                                   256 
269 version_h := include/generated/uapi/linux/vers    257 version_h := include/generated/uapi/linux/version.h
                                                   >> 258 old_version_h := include/linux/version.h
270                                                   259 
271 clean-targets := %clean mrproper cleandocs        260 clean-targets := %clean mrproper cleandocs
272 no-dot-config-targets := $(clean-targets) \       261 no-dot-config-targets := $(clean-targets) \
273                          cscope gtags TAGS tag    262                          cscope gtags TAGS tags help% %docs check% coccicheck \
274                          $(version_h) headers     263                          $(version_h) headers headers_% archheaders archscripts \
275                          %asm-generic kernelve !! 264                          %asm-generic kernelversion %src-pkg
276                          outputmakefile rustav !! 265 no-sync-config-targets := $(no-dot-config-targets) install %install \
277 no-sync-config-targets := $(no-dot-config-targ !! 266                            kernelrelease
278                           image_name           !! 267 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls << 
280                                                   268 
281 config-build    :=                                269 config-build    :=
282 mixed-build     :=                                270 mixed-build     :=
283 need-config     := 1                              271 need-config     := 1
284 may-sync-config := 1                              272 may-sync-config := 1
285 single-build    :=                                273 single-build    :=
286                                                   274 
287 ifneq ($(filter $(no-dot-config-targets), $(MA    275 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
288     ifeq ($(filter-out $(no-dot-config-targets !! 276         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
289         need-config :=                         !! 277                 need-config :=
290     endif                                      !! 278         endif
291 endif                                             279 endif
292                                                   280 
293 ifneq ($(filter $(no-sync-config-targets), $(M    281 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
294     ifeq ($(filter-out $(no-sync-config-target !! 282         ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
295         may-sync-config :=                     !! 283                 may-sync-config :=
296     endif                                      !! 284         endif
297 endif                                             285 endif
298                                                   286 
299 need-compiler := $(may-sync-config)            << 
300                                                << 
301 ifneq ($(KBUILD_EXTMOD),)                         287 ifneq ($(KBUILD_EXTMOD),)
302     may-sync-config :=                         !! 288         may-sync-config :=
303 endif                                             289 endif
304                                                   290 
305 ifeq ($(KBUILD_EXTMOD),)                          291 ifeq ($(KBUILD_EXTMOD),)
306     ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 292         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
307         config-build := 1                      !! 293                 config-build := 1
308         ifneq ($(words $(MAKECMDGOALS)),1)     !! 294                 ifneq ($(words $(MAKECMDGOALS)),1)
309             mixed-build := 1                   !! 295                         mixed-build := 1
                                                   >> 296                 endif
310         endif                                     297         endif
311     endif                                      << 
312 endif                                             298 endif
313                                                   299 
314 # We cannot build single targets and the other    300 # We cannot build single targets and the others at the same time
315 ifneq ($(filter $(single-targets), $(MAKECMDGO    301 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316     single-build := 1                          !! 302         single-build := 1
317     ifneq ($(filter-out $(single-targets), $(M !! 303         ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
318         mixed-build := 1                       !! 304                 mixed-build := 1
319     endif                                      !! 305         endif
320 endif                                             306 endif
321                                                   307 
322 # For "make -j clean all", "make -j mrproper d    308 # For "make -j clean all", "make -j mrproper defconfig all", etc.
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL    309 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
324     ifneq ($(filter-out $(clean-targets),$(MAK !! 310         ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
325         mixed-build := 1                       !! 311                 mixed-build := 1
326     endif                                      !! 312         endif
327 endif                                             313 endif
328                                                   314 
329 # install and modules_install need also be pro    315 # install and modules_install need also be processed one by one
330 ifneq ($(filter install,$(MAKECMDGOALS)),)        316 ifneq ($(filter install,$(MAKECMDGOALS)),)
331     ifneq ($(filter modules_install,$(MAKECMDG !! 317         ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
332         mixed-build := 1                       !! 318                 mixed-build := 1
333     endif                                      !! 319         endif
334 endif                                             320 endif
335                                                   321 
336 ifdef mixed-build                                 322 ifdef mixed-build
337 # ============================================    323 # ===========================================================================
338 # We're called with mixed targets (*config and    324 # We're called with mixed targets (*config and build targets).
339 # Handle them one by one.                         325 # Handle them one by one.
340                                                   326 
341 PHONY += $(MAKECMDGOALS) __build_one_by_one       327 PHONY += $(MAKECMDGOALS) __build_one_by_one
342                                                   328 
343 $(MAKECMDGOALS): __build_one_by_one            !! 329 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
344         @:                                        330         @:
345                                                   331 
346 __build_one_by_one:                               332 __build_one_by_one:
347         $(Q)set -e; \                             333         $(Q)set -e; \
348         for i in $(MAKECMDGOALS); do \            334         for i in $(MAKECMDGOALS); do \
349                 $(MAKE) -f $(srctree)/Makefile    335                 $(MAKE) -f $(srctree)/Makefile $$i; \
350         done                                      336         done
351                                                   337 
352 else # !mixed-build                               338 else # !mixed-build
353                                                   339 
354 include $(srctree)/scripts/Kbuild.include      !! 340 include scripts/Kbuild.include
355                                                   341 
356 # Read KERNELRELEASE from include/config/kerne    342 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(call read-file, include/conf !! 343 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.    344 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA    345 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360                                                   346 
361 include $(srctree)/scripts/subarch.include     !! 347 include scripts/subarch.include
362                                                   348 
363 # Cross compiling and selecting different set     349 # Cross compiling and selecting different set of gcc/bin-utils
364 # --------------------------------------------    350 # ---------------------------------------------------------------------------
365 #                                                 351 #
366 # When performing cross compilation for other     352 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for     353 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make:      354 # ARCH can be set during invocation of make:
369 # make ARCH=arm64                              !! 355 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir    356 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e    357 # The default ARCH is the host where make is executed.
372                                                   358 
373 # CROSS_COMPILE specify the prefix used for al    359 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin    360 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE).             361 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line    362 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu-        !! 363 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th    364 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr    365 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL    366 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
381 ARCH            ?= $(SUBARCH)                     367 ARCH            ?= $(SUBARCH)
382                                                   368 
383 # Architecture as present in compile.h            369 # Architecture as present in compile.h
384 UTS_MACHINE     := $(ARCH)                        370 UTS_MACHINE     := $(ARCH)
385 SRCARCH         := $(ARCH)                        371 SRCARCH         := $(ARCH)
386                                                   372 
387 # Additional ARCH settings for x86                373 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386)                               374 ifeq ($(ARCH),i386)
389         SRCARCH := x86                            375         SRCARCH := x86
390 endif                                             376 endif
391 ifeq ($(ARCH),x86_64)                             377 ifeq ($(ARCH),x86_64)
392         SRCARCH := x86                            378         SRCARCH := x86
393 endif                                             379 endif
394                                                   380 
395 # Additional ARCH settings for sparc              381 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32)                            382 ifeq ($(ARCH),sparc32)
397        SRCARCH := sparc                           383        SRCARCH := sparc
398 endif                                             384 endif
399 ifeq ($(ARCH),sparc64)                            385 ifeq ($(ARCH),sparc64)
400        SRCARCH := sparc                           386        SRCARCH := sparc
401 endif                                             387 endif
402                                                   388 
403 # Additional ARCH settings for parisc          !! 389 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64)                        !! 390 ifeq ($(ARCH),sh64)
405        SRCARCH := parisc                       !! 391        SRCARCH := sh
406 endif                                          << 
407                                                << 
408 export cross_compiling :=                      << 
409 ifneq ($(SRCARCH),$(SUBARCH))                  << 
410 cross_compiling := 1                           << 
411 endif                                             392 endif
412                                                   393 
413 KCONFIG_CONFIG  ?= .config                        394 KCONFIG_CONFIG  ?= .config
414 export KCONFIG_CONFIG                             395 export KCONFIG_CONFIG
415                                                   396 
416 # SHELL used by kbuild                            397 # SHELL used by kbuild
417 CONFIG_SHELL := sh                                398 CONFIG_SHELL := sh
418                                                   399 
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS     400 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG    401 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d    402 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
422                                                   403 
423 ifneq ($(LLVM),)                                  404 ifneq ($(LLVM),)
424 ifneq ($(filter %/,$(LLVM)),)                  !! 405 HOSTCC  = clang
425 LLVM_PREFIX := $(LLVM)                         !! 406 HOSTCXX = clang++
426 else ifneq ($(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                                              407 else
433 HOSTCC  = gcc                                     408 HOSTCC  = gcc
434 HOSTCXX = g++                                     409 HOSTCXX = g++
435 endif                                             410 endif
436 HOSTRUSTC = rustc                              !! 411 KBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
437 HOSTPKG_CONFIG  = pkg-config                   !! 412                 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
438                                                !! 413                 $(HOSTCFLAGS)
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 414 KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
440                          -O2 -fomit-frame-poin << 
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) << 
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)           << 
443                                                << 
444 # These flags apply to all Rust code in the tr << 
445 # host programs.                               << 
446 export rust_common_flags := --edition=2021 \   << 
447                             -Zbinary_dep_depin << 
448                             -Astable_features  << 
449                             -Dunsafe_op_in_uns << 
450                             -Dnon_ascii_idents << 
451                             -Wrust_2018_idioms << 
452                             -Wunreachable_pub  << 
453                             -Wmissing_docs \   << 
454                             -Wrustdoc::missing << 
455                             -Wclippy::all \    << 
456                             -Wclippy::mut_mut  << 
457                             -Wclippy::needless << 
458                             -Wclippy::needless << 
459                             -Wclippy::no_mangl << 
460                             -Wclippy::dbg_macr << 
461                                                << 
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS << 
463                        $(HOSTCFLAGS) -I $(srct << 
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 
465                        -I $(srctree)/scripts/i << 
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 
467                         -Zallow-features= $(HO << 
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H    415 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST    416 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
470                                                   417 
471 # Make variables (CC, etc...)                     418 # Make variables (CC, etc...)
472 CPP             = $(CC) -E                        419 CPP             = $(CC) -E
473 ifneq ($(LLVM),)                                  420 ifneq ($(LLVM),)
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU !! 421 CC              = clang
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S !! 422 LD              = ld.lld
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_ !! 423 AR              = llvm-ar
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_ !! 424 NM              = llvm-nm
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$( !! 425 OBJCOPY         = llvm-objcopy
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$( !! 426 OBJDUMP         = llvm-objdump
480 READELF         = $(LLVM_PREFIX)llvm-readelf$( !! 427 READELF         = llvm-readelf
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL !! 428 OBJSIZE         = llvm-size
                                                   >> 429 STRIP           = llvm-strip
482 else                                              430 else
483 CC              = $(CROSS_COMPILE)gcc             431 CC              = $(CROSS_COMPILE)gcc
484 LD              = $(CROSS_COMPILE)ld              432 LD              = $(CROSS_COMPILE)ld
485 AR              = $(CROSS_COMPILE)ar              433 AR              = $(CROSS_COMPILE)ar
486 NM              = $(CROSS_COMPILE)nm              434 NM              = $(CROSS_COMPILE)nm
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         435 OBJCOPY         = $(CROSS_COMPILE)objcopy
488 OBJDUMP         = $(CROSS_COMPILE)objdump         436 OBJDUMP         = $(CROSS_COMPILE)objdump
489 READELF         = $(CROSS_COMPILE)readelf         437 READELF         = $(CROSS_COMPILE)readelf
                                                   >> 438 OBJSIZE         = $(CROSS_COMPILE)size
490 STRIP           = $(CROSS_COMPILE)strip           439 STRIP           = $(CROSS_COMPILE)strip
491 endif                                             440 endif
492 RUSTC           = rustc                        << 
493 RUSTDOC         = rustdoc                      << 
494 RUSTFMT         = rustfmt                      << 
495 CLIPPY_DRIVER   = clippy-driver                << 
496 BINDGEN         = bindgen                      << 
497 PAHOLE          = pahole                          441 PAHOLE          = pahole
498 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve << 
499 LEX             = flex                            442 LEX             = flex
500 YACC            = bison                           443 YACC            = bison
501 AWK             = awk                             444 AWK             = awk
502 INSTALLKERNEL  := installkernel                   445 INSTALLKERNEL  := installkernel
                                                   >> 446 DEPMOD          = depmod
503 PERL            = perl                            447 PERL            = perl
                                                   >> 448 PYTHON          = python
504 PYTHON3         = python3                         449 PYTHON3         = python3
505 CHECK           = sparse                          450 CHECK           = sparse
506 BASH            = bash                            451 BASH            = bash
507 KGZIP           = gzip                            452 KGZIP           = gzip
508 KBZIP2          = bzip2                           453 KBZIP2          = bzip2
509 KLZOP           = lzop                            454 KLZOP           = lzop
510 LZMA            = lzma                            455 LZMA            = lzma
511 LZ4             = lz4c                            456 LZ4             = lz4c
512 XZ              = xz                              457 XZ              = xz
513 ZSTD            = zstd                         << 
514                                                   458 
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    459 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516                   -Wbitwise -Wno-return-void -    460                   -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
517 NOSTDINC_FLAGS :=                                 461 NOSTDINC_FLAGS :=
518 CFLAGS_MODULE   =                                 462 CFLAGS_MODULE   =
519 RUSTFLAGS_MODULE =                             << 
520 AFLAGS_MODULE   =                                 463 AFLAGS_MODULE   =
521 LDFLAGS_MODULE  =                                 464 LDFLAGS_MODULE  =
522 CFLAGS_KERNEL   =                                 465 CFLAGS_KERNEL   =
523 RUSTFLAGS_KERNEL =                             << 
524 AFLAGS_KERNEL   =                                 466 AFLAGS_KERNEL   =
525 LDFLAGS_vmlinux =                                 467 LDFLAGS_vmlinux =
526                                                   468 
527 # Use USERINCLUDE when you must reference the     469 # Use USERINCLUDE when you must reference the UAPI directories only.
528 USERINCLUDE    := \                               470 USERINCLUDE    := \
529                 -I$(srctree)/arch/$(SRCARCH)/i    471                 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
530                 -I$(objtree)/arch/$(SRCARCH)/i    472                 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
531                 -I$(srctree)/include/uapi \       473                 -I$(srctree)/include/uapi \
532                 -I$(objtree)/include/generated    474                 -I$(objtree)/include/generated/uapi \
533                 -include $(srctree)/include/li << 
534                 -include $(srctree)/include/li    475                 -include $(srctree)/include/linux/kconfig.h
535                                                   476 
536 # Use LINUXINCLUDE when you must reference the    477 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option      478 # Needed to be compatible with the O= option
538 LINUXINCLUDE    := \                              479 LINUXINCLUDE    := \
539                 -I$(srctree)/arch/$(SRCARCH)/i    480                 -I$(srctree)/arch/$(SRCARCH)/include \
540                 -I$(objtree)/arch/$(SRCARCH)/i    481                 -I$(objtree)/arch/$(SRCARCH)/include/generated \
541                 $(if $(building_out_of_srctree    482                 $(if $(building_out_of_srctree),-I$(srctree)/include) \
542                 -I$(objtree)/include \            483                 -I$(objtree)/include \
543                 $(USERINCLUDE)                    484                 $(USERINCLUDE)
544                                                   485 
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE        486 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
546                                                !! 487 KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
547 KBUILD_CFLAGS :=                               !! 488                    -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
548 KBUILD_CFLAGS += -std=gnu11                    !! 489                    -Werror=implicit-function-declaration -Werror=implicit-int \
549 KBUILD_CFLAGS += -fshort-wchar                 !! 490                    -Werror=return-type -Wno-format-security \
550 KBUILD_CFLAGS += -funsigned-char               !! 491                    -std=gnu89
551 KBUILD_CFLAGS += -fno-common                   << 
552 KBUILD_CFLAGS += -fno-PIE                      << 
553 KBUILD_CFLAGS += -fno-strict-aliasing          << 
554                                                << 
555 KBUILD_CPPFLAGS := -D__KERNEL__                   492 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 :=                           493 KBUILD_AFLAGS_KERNEL :=
565 KBUILD_CFLAGS_KERNEL :=                           494 KBUILD_CFLAGS_KERNEL :=
566 KBUILD_RUSTFLAGS_KERNEL :=                     << 
567 KBUILD_AFLAGS_MODULE  := -DMODULE                 495 KBUILD_AFLAGS_MODULE  := -DMODULE
568 KBUILD_CFLAGS_MODULE  := -DMODULE                 496 KBUILD_CFLAGS_MODULE  := -DMODULE
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE        << 
570 KBUILD_LDFLAGS_MODULE :=                          497 KBUILD_LDFLAGS_MODULE :=
                                                   >> 498 export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
571 KBUILD_LDFLAGS :=                                 499 KBUILD_LDFLAGS :=
                                                   >> 500 GCC_PLUGINS_CFLAGS :=
572 CLANG_FLAGS :=                                    501 CLANG_FLAGS :=
573                                                   502 
574 ifeq ($(KBUILD_CLIPPY),1)                      !! 503 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
575         RUSTC_OR_CLIPPY_QUIET := CLIPPY        !! 504 export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
576         RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)     !! 505 export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
577 else                                           !! 506 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ
578         RUSTC_OR_CLIPPY_QUIET := RUSTC         << 
579         RUSTC_OR_CLIPPY = $(RUSTC)             << 
580 endif                                          << 
581                                                << 
582 # Allows the usage of unstable features in sta << 
583 export RUSTC_BOOTSTRAP := 1                    << 
584                                                << 
585 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K << 
586 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q << 
587 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS          << 
588 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF << 
589 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ << 
590 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD     << 
591 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS     507 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
592 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS    << 
593                                                   508 
594 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC    509 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
595 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU    510 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
596 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF !! 511 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
597 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    512 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
598 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 513 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
599 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 514 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
600                                                   515 
601 # Files to ignore in find ... statements          516 # Files to ignore in find ... statements
602                                                   517 
603 export RCS_FIND_IGNORE := \( -name SCCS -o -na    518 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
604                           -name CVS -o -name .    519                           -name CVS -o -name .pc -o -name .hg -o -name .git \) \
605                           -prune -o               520                           -prune -o
                                                   >> 521 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
                                                   >> 522                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
606                                                   523 
607 # ============================================    524 # ===========================================================================
608 # Rules shared between *config targets and bui    525 # Rules shared between *config targets and build targets
609                                                   526 
610 # Basic helpers built in scripts/basic/           527 # Basic helpers built in scripts/basic/
611 PHONY += scripts_basic                            528 PHONY += scripts_basic
612 scripts_basic:                                    529 scripts_basic:
613         $(Q)$(MAKE) $(build)=scripts/basic        530         $(Q)$(MAKE) $(build)=scripts/basic
                                                   >> 531         $(Q)rm -f .tmp_quiet_recordmcount
614                                                   532 
615 PHONY += outputmakefile                           533 PHONY += outputmakefile
616 ifdef building_out_of_srctree                  << 
617 # Before starting out-of-tree build, make sure    534 # Before starting out-of-tree build, make sure the source tree is clean.
618 # outputmakefile generates a Makefile in the o    535 # outputmakefile generates a Makefile in the output directory, if using a
619 # separate output directory. This allows conve    536 # separate output directory. This allows convenient use of make in the
620 # output directory.                               537 # output directory.
621 # At the same time when output Makefile genera    538 # At the same time when output Makefile generated, generate .gitignore to
622 # ignore whole output directory                   539 # ignore whole output directory
623                                                << 
624 quiet_cmd_makefile = GEN     Makefile          << 
625       cmd_makefile = { \                       << 
626         echo "\# Automatically generated by $( << 
627         echo "include $(srctree)/Makefile"; \  << 
628         } > Makefile                           << 
629                                                << 
630 outputmakefile:                                   540 outputmakefile:
631         @if [ -f $(srctree)/.config -o \       !! 541 ifdef building_out_of_srctree
                                                   >> 542         $(Q)if [ -f $(srctree)/.config -o \
632                  -d $(srctree)/include/config     543                  -d $(srctree)/include/config -o \
633                  -d $(srctree)/arch/$(SRCARCH)    544                  -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
634                 echo >&2 "***"; \                 545                 echo >&2 "***"; \
635                 echo >&2 "*** The source tree     546                 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
636                 echo >&2 "*** in $(abs_srctree    547                 echo >&2 "*** in $(abs_srctree)";\
637                 echo >&2 "***"; \                 548                 echo >&2 "***"; \
638                 false; \                          549                 false; \
639         fi                                        550         fi
640         $(Q)ln -fsn $(srctree) source             551         $(Q)ln -fsn $(srctree) source
641         $(call cmd,makefile)                   !! 552         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
642         $(Q)test -e .gitignore || \               553         $(Q)test -e .gitignore || \
643         { echo "# this is build directory, ign    554         { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
644 endif                                             555 endif
645                                                   556 
646 # The expansion should be delayed until arch/$ !! 557 ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
647 # Some architectures define CROSS_COMPILE in a !! 558 ifneq ($(CROSS_COMPILE),)
648 # CC_VERSION_TEXT and RUSTC_VERSION_TEXT are r !! 559 CLANG_FLAGS     += --target=$(notdir $(CROSS_COMPILE:%-=%))
649 # need export), and from include/config/auto.c !! 560 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
650 # upgrade.                                     !! 561 CLANG_FLAGS     += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
651 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 562 GCC_TOOLCHAIN   := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
652 RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell !! 563 endif
653                                                !! 564 ifneq ($(GCC_TOOLCHAIN),)
654 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), !! 565 CLANG_FLAGS     += --gcc-toolchain=$(GCC_TOOLCHAIN)
655 include $(srctree)/scripts/Makefile.clang      !! 566 endif
                                                   >> 567 ifneq ($(LLVM_IAS),1)
                                                   >> 568 CLANG_FLAGS     += -no-integrated-as
                                                   >> 569 endif
                                                   >> 570 CLANG_FLAGS     += -Werror=unknown-warning-option
                                                   >> 571 KBUILD_CFLAGS   += $(CLANG_FLAGS)
                                                   >> 572 KBUILD_AFLAGS   += $(CLANG_FLAGS)
                                                   >> 573 export CLANG_FLAGS
656 endif                                             574 endif
657                                                   575 
658 # Include this also for config targets because !! 576 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
659 # cc-cross-prefix to determine CROSS_COMPILE.  !! 577 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
660 ifdef need-compiler                            !! 578 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
661 include $(srctree)/scripts/Makefile.compiler   !! 579 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
662 endif                                          !! 580 CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
663                                                   581 
664 ifdef config-build                                582 ifdef config-build
665 # ============================================    583 # ===========================================================================
666 # *config targets only - make sure prerequisit    584 # *config targets only - make sure prerequisites are updated, and descend
667 # in scripts/kconfig to make the *config targe    585 # in scripts/kconfig to make the *config target
668                                                   586 
669 # Read arch-specific Makefile to set KBUILD_DE !! 587 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
670 # KBUILD_DEFCONFIG may point out an alternativ    588 # KBUILD_DEFCONFIG may point out an alternative default configuration
671 # used for 'make defconfig'                       589 # used for 'make defconfig'
672 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 590 include arch/$(SRCARCH)/Makefile
673 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 591 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
674                                                   592 
675 config: outputmakefile scripts_basic FORCE        593 config: outputmakefile scripts_basic FORCE
676         $(Q)$(MAKE) $(build)=scripts/kconfig $    594         $(Q)$(MAKE) $(build)=scripts/kconfig $@
677                                                   595 
678 %config: outputmakefile scripts_basic FORCE       596 %config: outputmakefile scripts_basic FORCE
679         $(Q)$(MAKE) $(build)=scripts/kconfig $    597         $(Q)$(MAKE) $(build)=scripts/kconfig $@
680                                                   598 
681 else #!config-build                               599 else #!config-build
682 # ============================================    600 # ===========================================================================
683 # Build targets only - this includes vmlinux,  !! 601 # Build targets only - this includes vmlinux, arch specific targets, clean
684 # targets and others. In general all targets e    602 # targets and others. In general all targets except *config targets.
685                                                   603 
686 # If building an external module we do not car    604 # If building an external module we do not care about the all: rule
687 # but instead __all depend on modules          !! 605 # but instead _all depend on modules
688 PHONY += all                                      606 PHONY += all
689 ifeq ($(KBUILD_EXTMOD),)                          607 ifeq ($(KBUILD_EXTMOD),)
690 __all: all                                     !! 608 _all: all
691 else                                              609 else
692 __all: modules                                 !! 610 _all: modules
693 endif                                             611 endif
694                                                   612 
695 targets :=                                     << 
696                                                << 
697 # Decide whether to build built-in, modular, o    613 # Decide whether to build built-in, modular, or both.
698 # Normally, just do built-in.                     614 # Normally, just do built-in.
699                                                   615 
700 KBUILD_MODULES :=                                 616 KBUILD_MODULES :=
701 KBUILD_BUILTIN := 1                               617 KBUILD_BUILTIN := 1
702                                                   618 
703 # If we have only "make modules", don't compil    619 # If we have only "make modules", don't compile built-in objects.
704 ifeq ($(MAKECMDGOALS),modules)                    620 ifeq ($(MAKECMDGOALS),modules)
705   KBUILD_BUILTIN :=                               621   KBUILD_BUILTIN :=
706 endif                                             622 endif
707                                                   623 
708 # If we have "make <whatever> modules", compil    624 # If we have "make <whatever> modules", compile modules
709 # in addition to whatever we do anyway.           625 # in addition to whatever we do anyway.
710 # Just "make" or "make all" shall build module    626 # Just "make" or "make all" shall build modules as well
711                                                   627 
712 ifneq ($(filter all modules nsdeps %compile_co !! 628 ifneq ($(filter all _all modules nsdeps,$(MAKECMDGOALS)),)
713   KBUILD_MODULES := 1                             629   KBUILD_MODULES := 1
714 endif                                             630 endif
715                                                   631 
716 ifeq ($(MAKECMDGOALS),)                           632 ifeq ($(MAKECMDGOALS),)
717   KBUILD_MODULES := 1                             633   KBUILD_MODULES := 1
718 endif                                             634 endif
719                                                   635 
720 export KBUILD_MODULES KBUILD_BUILTIN              636 export KBUILD_MODULES KBUILD_BUILTIN
721                                                   637 
722 ifdef need-config                                 638 ifdef need-config
723 include include/config/auto.conf                  639 include include/config/auto.conf
724 endif                                             640 endif
725                                                   641 
726 ifeq ($(KBUILD_EXTMOD),)                          642 ifeq ($(KBUILD_EXTMOD),)
727 # Objects we will link into vmlinux / subdirs     643 # Objects we will link into vmlinux / subdirs we need to visit
728 core-y          :=                             !! 644 init-y          := init/
729 drivers-y       :=                             !! 645 drivers-y       := drivers/ sound/
                                                   >> 646 drivers-$(CONFIG_SAMPLES) += samples/
                                                   >> 647 net-y           := net/
730 libs-y          := lib/                           648 libs-y          := lib/
                                                   >> 649 core-y          := usr/
                                                   >> 650 virt-y          := virt/
731 endif # KBUILD_EXTMOD                             651 endif # KBUILD_EXTMOD
732                                                   652 
733 # The all: target is the default when no targe    653 # The all: target is the default when no target is given on the
734 # command line.                                   654 # command line.
735 # This allow a user to issue only 'make' to bu    655 # This allow a user to issue only 'make' to build a kernel including modules
736 # Defaults to vmlinux, but the arch makefile u    656 # Defaults to vmlinux, but the arch makefile usually adds further targets
737 all: vmlinux                                      657 all: vmlinux
738                                                   658 
739 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover !! 659 CFLAGS_GCOV     := -fprofile-arcs -ftest-coverage \
740 ifdef CONFIG_CC_IS_GCC                         !! 660         $(call cc-option,-fno-tree-loop-im) \
741 CFLAGS_GCOV     += -fno-tree-loop-im           !! 661         $(call cc-disable-warning,maybe-uninitialized,)
742 endif                                          << 
743 export CFLAGS_GCOV                                662 export CFLAGS_GCOV
744                                                   663 
745 # The arch Makefiles can override CC_FLAGS_FTR    664 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
746 ifdef CONFIG_FUNCTION_TRACER                      665 ifdef CONFIG_FUNCTION_TRACER
747   CC_FLAGS_FTRACE := -pg                          666   CC_FLAGS_FTRACE := -pg
748 endif                                             667 endif
749                                                   668 
750 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 669 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
                                                   >> 670 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
                                                   >> 671 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
                                                   >> 672 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
                                                   >> 673 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
                                                   >> 674 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
                                                   >> 675 export RETPOLINE_CFLAGS
                                                   >> 676 export RETPOLINE_VDSO_CFLAGS
                                                   >> 677 
                                                   >> 678 include arch/$(SRCARCH)/Makefile
751                                                   679 
752 ifdef need-config                                 680 ifdef need-config
753 ifdef may-sync-config                             681 ifdef may-sync-config
754 # Read in dependencies to all Kconfig* files,     682 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
755 # changes are detected. This should be include    683 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
756 # because some architectures define CROSS_COMP    684 # because some architectures define CROSS_COMPILE there.
757 include include/config/auto.conf.cmd              685 include include/config/auto.conf.cmd
758                                                   686 
759 $(KCONFIG_CONFIG):                                687 $(KCONFIG_CONFIG):
760         @echo >&2 '***'                           688         @echo >&2 '***'
761         @echo >&2 '*** Configuration file "$@"    689         @echo >&2 '*** Configuration file "$@" not found!'
762         @echo >&2 '***'                           690         @echo >&2 '***'
763         @echo >&2 '*** Please run some configu    691         @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
764         @echo >&2 '*** "make menuconfig" or "m    692         @echo >&2 '*** "make menuconfig" or "make xconfig").'
765         @echo >&2 '***'                           693         @echo >&2 '***'
766         @/bin/false                               694         @/bin/false
767                                                   695 
768 # The actual configuration files used during t    696 # The actual configuration files used during the build are stored in
769 # include/generated/ and include/config/. Upda    697 # include/generated/ and include/config/. Update them if .config is newer than
770 # include/config/auto.conf (which mirrors .con    698 # include/config/auto.conf (which mirrors .config).
771 #                                                 699 #
772 # This exploits the 'multi-target pattern rule    700 # This exploits the 'multi-target pattern rule' trick.
773 # The syncconfig should be executed only once     701 # The syncconfig should be executed only once to make all the targets.
774 # (Note: use the grouped target '&:' when we b !! 702 %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
775 #                                              << 
776 # Do not use $(call cmd,...) here. That would  << 
777 # so you cannot notice that Kconfig is waiting << 
778 %/config/auto.conf %/config/auto.conf.cmd %/ge << 
779         $(Q)$(kecho) "  SYNC    $@"            << 
780         $(Q)$(MAKE) -f $(srctree)/Makefile syn    703         $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
781 else # !may-sync-config                           704 else # !may-sync-config
782 # External modules and some install targets ne    705 # External modules and some install targets need include/generated/autoconf.h
783 # and include/config/auto.conf but do not care    706 # and include/config/auto.conf but do not care if they are up-to-date.
784 # Use auto.conf to trigger the test               707 # Use auto.conf to trigger the test
785 PHONY += include/config/auto.conf                 708 PHONY += include/config/auto.conf
786                                                   709 
787 include/config/auto.conf:                         710 include/config/auto.conf:
788         @test -e include/generated/autoconf.h  !! 711         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
789         echo >&2;                                 712         echo >&2;                                                       \
790         echo >&2 "  ERROR: Kernel configuratio    713         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
791         echo >&2 "         include/generated/a    714         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
792         echo >&2 "         Run 'make oldconfig    715         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
793         echo >&2 ;                                716         echo >&2 ;                                                      \
794         /bin/false)                               717         /bin/false)
795                                                   718 
796 endif # may-sync-config                           719 endif # may-sync-config
797 endif # need-config                               720 endif # need-config
798                                                   721 
799 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch !! 722 KBUILD_CFLAGS   += $(call cc-option,-fno-delete-null-pointer-checks,)
                                                   >> 723 KBUILD_CFLAGS   += $(call cc-disable-warning,frame-address,)
                                                   >> 724 KBUILD_CFLAGS   += $(call cc-disable-warning, format-truncation)
                                                   >> 725 KBUILD_CFLAGS   += $(call cc-disable-warning, format-overflow)
                                                   >> 726 KBUILD_CFLAGS   += $(call cc-disable-warning, address-of-packed-member)
800                                                   727 
801 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE          728 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
802 KBUILD_CFLAGS += -O2                              729 KBUILD_CFLAGS += -O2
803 KBUILD_RUSTFLAGS += -Copt-level=2              !! 730 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
                                                   >> 731 KBUILD_CFLAGS += -O3
804 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE            732 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
805 KBUILD_CFLAGS += -Os                              733 KBUILD_CFLAGS += -Os
806 KBUILD_RUSTFLAGS += -Copt-level=s              << 
807 endif                                             734 endif
808                                                   735 
809 # Always set `debug-assertions` and `overflow- << 
810 # depends on `opt-level` and `debug-assertions << 
811 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( << 
812 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 
813                                                << 
814 # Tell gcc to never replace conditional load w    736 # Tell gcc to never replace conditional load with a non-conditional one
815 ifdef CONFIG_CC_IS_GCC                         << 
816 # gcc-10 renamed --param=allow-store-data-race << 
817 # -fno-allow-store-data-races.                 << 
818 KBUILD_CFLAGS   += $(call cc-option,--param=al    737 KBUILD_CFLAGS   += $(call cc-option,--param=allow-store-data-races=0)
819 KBUILD_CFLAGS   += $(call cc-option,-fno-allow    738 KBUILD_CFLAGS   += $(call cc-option,-fno-allow-store-data-races)
820 endif                                          !! 739 
                                                   >> 740 include scripts/Makefile.kcov
                                                   >> 741 include scripts/Makefile.gcc-plugins
821                                                   742 
822 ifdef CONFIG_READABLE_ASM                         743 ifdef CONFIG_READABLE_ASM
823 # Disable optimizations that make assembler li    744 # Disable optimizations that make assembler listings hard to read.
824 # reorder blocks reorders the control in the f    745 # reorder blocks reorders the control in the function
825 # ipa clone creates specialized cloned functio    746 # ipa clone creates specialized cloned functions
826 # partial inlining inlines only parts of funct    747 # partial inlining inlines only parts of functions
827 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- !! 748 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
                                                   >> 749                  $(call cc-option,-fno-ipa-cp-clone,) \
                                                   >> 750                  $(call cc-option,-fno-partial-inlining)
828 endif                                             751 endif
829                                                   752 
830 stackp-flags-y                                 !! 753 ifneq ($(CONFIG_FRAME_WARN),0)
                                                   >> 754 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
                                                   >> 755 endif
                                                   >> 756 
                                                   >> 757 stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
831 stackp-flags-$(CONFIG_STACKPROTECTOR)             758 stackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
832 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      759 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
833                                                   760 
834 KBUILD_CFLAGS += $(stackp-flags-y)                761 KBUILD_CFLAGS += $(stackp-flags-y)
835                                                   762 
836 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning !! 763 ifdef CONFIG_CC_IS_CLANG
837 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)      !! 764 KBUILD_CPPFLAGS += -Qunused-arguments
                                                   >> 765 KBUILD_CFLAGS += -Wno-format-invalid-specifier
                                                   >> 766 KBUILD_CFLAGS += -Wno-gnu
                                                   >> 767 # Quiet clang warning: comparison of unsigned expression < 0 is always false
                                                   >> 768 KBUILD_CFLAGS += -Wno-tautological-compare
                                                   >> 769 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
                                                   >> 770 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
                                                   >> 771 # See modpost pattern 2
                                                   >> 772 KBUILD_CFLAGS += -mno-global-merge
                                                   >> 773 else
                                                   >> 774 
                                                   >> 775 # Warn about unmarked fall-throughs in switch statement.
                                                   >> 776 # Disabled for clang while comment to attribute conversion happens and
                                                   >> 777 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
                                                   >> 778 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
                                                   >> 779 endif
                                                   >> 780 
                                                   >> 781 # These warnings generated too much noise in a regular build.
                                                   >> 782 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
                                                   >> 783 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
                                                   >> 784 
                                                   >> 785 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
                                                   >> 786 
                                                   >> 787 # These result in bogus false positives
                                                   >> 788 KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
838                                                   789 
839 ifdef CONFIG_FRAME_POINTER                        790 ifdef CONFIG_FRAME_POINTER
840 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    791 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
841 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y   << 
842 else                                              792 else
843 # Some targets (ARM with Thumb2, for example),    793 # Some targets (ARM with Thumb2, for example), can't be built with frame
844 # pointers.  For those, we don't have FUNCTION    794 # pointers.  For those, we don't have FUNCTION_TRACER automatically
845 # select FRAME_POINTER.  However, FUNCTION_TRA    795 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
846 # incompatible with -fomit-frame-pointer with     796 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
847 # -fomit-frame-pointer with FUNCTION_TRACER.      797 # -fomit-frame-pointer with FUNCTION_TRACER.
848 # In the Rust target specification, "frame-poi << 
849 # to "may-omit".                               << 
850 ifndef CONFIG_FUNCTION_TRACER                     798 ifndef CONFIG_FUNCTION_TRACER
851 KBUILD_CFLAGS   += -fomit-frame-pointer           799 KBUILD_CFLAGS   += -fomit-frame-pointer
852 endif                                             800 endif
853 endif                                             801 endif
854                                                   802 
855 # Initialize all stack variables with a 0xAA p !! 803 # Initialize all stack variables with a pattern, if desired.
856 ifdef CONFIG_INIT_STACK_ALL_PATTERN            !! 804 ifdef CONFIG_INIT_STACK_ALL
857 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat    805 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pattern
858 endif                                             806 endif
859                                                   807 
860 # Initialize all stack variables with a zero v !! 808 DEBUG_CFLAGS    := $(call cc-option, -fno-var-tracking-assignments)
861 ifdef CONFIG_INIT_STACK_ALL_ZERO               !! 809 
862 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer !! 810 ifdef CONFIG_DEBUG_INFO
863 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER !! 811 ifdef CONFIG_DEBUG_INFO_SPLIT
864 # https://github.com/llvm/llvm-project/issues/ !! 812 DEBUG_CFLAGS    += -gsplit-dwarf
865 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi !! 813 else
866 export CC_AUTO_VAR_INIT_ZERO_ENABLER           !! 814 DEBUG_CFLAGS    += -g
867 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA !! 815 endif
                                                   >> 816 ifeq ($(LLVM_IAS),1)
                                                   >> 817 KBUILD_AFLAGS   += -g
                                                   >> 818 else
                                                   >> 819 KBUILD_AFLAGS   += -Wa,-gdwarf-2
                                                   >> 820 endif
868 endif                                             821 endif
                                                   >> 822 
                                                   >> 823 ifdef CONFIG_DEBUG_INFO_DWARF4
                                                   >> 824 DEBUG_CFLAGS    += -gdwarf-4
869 endif                                             825 endif
870                                                   826 
871 # While VLAs have been removed, GCC produces u !! 827 ifdef CONFIG_DEBUG_INFO_REDUCED
872 # for the randomize_kstack_offset feature. Dis !! 828 DEBUG_CFLAGS    += $(call cc-option, -femit-struct-debug-baseonly) \
873 KBUILD_CFLAGS   += $(call cc-option, -fno-stac !! 829                    $(call cc-option,-fno-var-tracking)
874                                                << 
875 # Clear used registers at func exit (to reduce << 
876 ifdef CONFIG_ZERO_CALL_USED_REGS               << 
877 KBUILD_CFLAGS   += -fzero-call-used-regs=used- << 
878 endif                                             830 endif
879                                                   831 
                                                   >> 832 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
                                                   >> 833 export DEBUG_CFLAGS
                                                   >> 834 
880 ifdef CONFIG_FUNCTION_TRACER                      835 ifdef CONFIG_FUNCTION_TRACER
881 ifdef CONFIG_FTRACE_MCOUNT_USE_CC              !! 836 ifdef CONFIG_FTRACE_MCOUNT_RECORD
882   CC_FLAGS_FTRACE       += -mrecord-mcount     !! 837   # gcc 5 supports generating the mcount tables directly
                                                   >> 838   ifeq ($(call cc-option-yn,-mrecord-mcount),y)
                                                   >> 839     CC_FLAGS_FTRACE     += -mrecord-mcount
                                                   >> 840     export CC_USING_RECORD_MCOUNT := 1
                                                   >> 841   endif
883   ifdef CONFIG_HAVE_NOP_MCOUNT                    842   ifdef CONFIG_HAVE_NOP_MCOUNT
884     ifeq ($(call cc-option-yn, -mnop-mcount),y    843     ifeq ($(call cc-option-yn, -mnop-mcount),y)
885       CC_FLAGS_FTRACE   += -mnop-mcount           844       CC_FLAGS_FTRACE   += -mnop-mcount
886       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU    845       CC_FLAGS_USING    += -DCC_USING_NOP_MCOUNT
887     endif                                         846     endif
888   endif                                           847   endif
889 endif                                             848 endif
890 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL         << 
891   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT         << 
892     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU << 
893   endif                                        << 
894 endif                                          << 
895 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT    << 
896   ifdef CONFIG_HAVE_C_RECORDMCOUNT             << 
897     BUILD_C_RECORDMCOUNT := y                  << 
898     export BUILD_C_RECORDMCOUNT                << 
899   endif                                        << 
900 endif                                          << 
901 ifdef CONFIG_HAVE_FENTRY                          849 ifdef CONFIG_HAVE_FENTRY
902   # s390-linux-gnu-gcc did not support -mfentr << 
903   ifeq ($(call cc-option-yn, -mfentry),y)         850   ifeq ($(call cc-option-yn, -mfentry),y)
904     CC_FLAGS_FTRACE     += -mfentry               851     CC_FLAGS_FTRACE     += -mfentry
905     CC_FLAGS_USING      += -DCC_USING_FENTRY      852     CC_FLAGS_USING      += -DCC_USING_FENTRY
906   endif                                           853   endif
907 endif                                             854 endif
908 export CC_FLAGS_FTRACE                            855 export CC_FLAGS_FTRACE
909 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA    856 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
910 KBUILD_AFLAGS   += $(CC_FLAGS_USING)              857 KBUILD_AFLAGS   += $(CC_FLAGS_USING)
                                                   >> 858 ifdef CONFIG_DYNAMIC_FTRACE
                                                   >> 859         ifdef CONFIG_HAVE_C_RECORDMCOUNT
                                                   >> 860                 BUILD_C_RECORDMCOUNT := y
                                                   >> 861                 export BUILD_C_RECORDMCOUNT
                                                   >> 862         endif
                                                   >> 863 endif
911 endif                                             864 endif
912                                                   865 
913 # We trigger additional mismatches with less i    866 # We trigger additional mismatches with less inlining
914 ifdef CONFIG_DEBUG_SECTION_MISMATCH               867 ifdef CONFIG_DEBUG_SECTION_MISMATCH
915 KBUILD_CFLAGS += -fno-inline-functions-called- !! 868 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
916 endif                                             869 endif
917                                                   870 
918 # `rustc`'s `-Zfunction-sections` applies to d << 
919 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION        871 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
920 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f    872 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
921 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections << 
922 LDFLAGS_vmlinux += --gc-sections                  873 LDFLAGS_vmlinux += --gc-sections
923 endif                                             874 endif
924                                                   875 
925 ifdef CONFIG_SHADOW_CALL_STACK                 !! 876 ifdef CONFIG_LIVEPATCH
926 ifndef CONFIG_DYNAMIC_SCS                      !! 877 KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
927 CC_FLAGS_SCS    := -fsanitize=shadow-call-stac << 
928 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)             << 
929 KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-st << 
930 endif                                          << 
931 export CC_FLAGS_SCS                            << 
932 endif                                             878 endif
933                                                   879 
934 ifdef CONFIG_LTO_CLANG                         !! 880 # arch Makefile may override CC so keep this after arch Makefile is included
935 ifdef CONFIG_LTO_CLANG_THIN                    !! 881 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
936 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit << 
937 else                                           << 
938 CC_FLAGS_LTO    := -flto                       << 
939 endif                                          << 
940 CC_FLAGS_LTO    += -fvisibility=hidden         << 
941                                                   882 
942 # Limit inlining across translation units to r !! 883 # warn about C99 declaration after statement
943 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 !! 884 KBUILD_CFLAGS += -Wdeclaration-after-statement
944 endif                                          << 
945                                                   885 
946 ifdef CONFIG_LTO                               !! 886 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
947 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)    !! 887 KBUILD_CFLAGS += -Wvla
948 KBUILD_AFLAGS   += -fno-lto                    << 
949 export CC_FLAGS_LTO                            << 
950 endif                                          << 
951                                                   888 
952 ifdef CONFIG_CFI_CLANG                         !! 889 # disable pointer signed / unsigned warnings in gcc 4.0
953 CC_FLAGS_CFI    := -fsanitize=kcfi             !! 890 KBUILD_CFLAGS += -Wno-pointer-sign
954 ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS      << 
955         CC_FLAGS_CFI    += -fsanitize-cfi-ical << 
956 endif                                          << 
957 ifdef CONFIG_RUST                              << 
958         # Always pass -Zsanitizer-cfi-normaliz << 
959         # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. << 
960         RUSTC_FLAGS_CFI   := -Zsanitizer=kcfi  << 
961         KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) << 
962         export RUSTC_FLAGS_CFI                 << 
963 endif                                          << 
964 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)             << 
965 export CC_FLAGS_CFI                            << 
966 endif                                          << 
967                                                   891 
968 # Architectures can define flags to add/remove !! 892 # disable stringop warnings in gcc 8+
969 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UN !! 893 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
970 export CC_FLAGS_FPU                            << 
971 export CC_FLAGS_NO_FPU                         << 
972                                                   894 
973 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)         !! 895 # We'll want to enable this eventually, but it's not going away for 5.7 at least
974 # Set the minimal function alignment. Use the  !! 896 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
975 # -fmin-function-alignment if it is available, !! 897 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
976 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME !! 898 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
977 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT     << 
978 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 
979 else                                           << 
980 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 
981 endif                                          << 
982 endif                                          << 
983                                                   899 
984 # arch Makefile may override CC so keep this a !! 900 # Another good warning that we'll want to enable eventually
985 NOSTDINC_FLAGS += -nostdinc                    !! 901 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
986                                                   902 
987 # To gain proper coverage for CONFIG_UBSAN_BOU !! 903 # Enabled with W=2, disabled by default as noisy
988 # the kernel uses only C99 flexible arrays for !! 904 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
989 # arrays. Enforce this for everything that may << 
990 # perform bounds checking.                     << 
991 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl << 
992                                                << 
993 #Currently, disable -Wstringop-overflow for GC << 
994 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW << 
995 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + << 
996                                                   905 
997 # disable invalid "can't wrap" optimizations f    906 # disable invalid "can't wrap" optimizations for signed / pointers
998 KBUILD_CFLAGS   += -fno-strict-overflow        !! 907 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
                                                   >> 908 
                                                   >> 909 # clang sets -fmerge-all-constants by default as optimization, but this
                                                   >> 910 # is non-conforming behavior for C and in fact breaks the kernel, so we
                                                   >> 911 # need to disable it here generally.
                                                   >> 912 KBUILD_CFLAGS   += $(call cc-option,-fno-merge-all-constants)
                                                   >> 913 
                                                   >> 914 # for gcc -fno-merge-all-constants disables everything, but it is fine
                                                   >> 915 # to have actual conforming behavior enabled.
                                                   >> 916 KBUILD_CFLAGS   += $(call cc-option,-fmerge-constants)
999                                                   917 
1000 # Make sure -fstack-check isn't enabled (like    918 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
1001 KBUILD_CFLAGS  += -fno-stack-check            !! 919 KBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
1002                                                  920 
1003 # conserve stack if available                    921 # conserve stack if available
1004 ifdef CONFIG_CC_IS_GCC                        !! 922 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
1005 KBUILD_CFLAGS   += -fconserve-stack           !! 923 
1006 endif                                         !! 924 # Prohibit date/time macros, which would make the build non-deterministic
                                                   >> 925 KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
                                                   >> 926 
                                                   >> 927 # enforce correct pointer usage
                                                   >> 928 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
                                                   >> 929 
                                                   >> 930 # Require designated initializers for all marked structures
                                                   >> 931 KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
1007                                                  932 
1008 # change __FILE__ to the relative path from t    933 # change __FILE__ to the relative path from the srctree
1009 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p !! 934 KBUILD_CFLAGS   += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1010                                                  935 
1011 # include additional Makefiles when needed    !! 936 include scripts/Makefile.kasan
1012 include-y                       := scripts/Ma !! 937 include scripts/Makefile.extrawarn
1013 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma !! 938 include scripts/Makefile.ubsan
1014 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma << 
1015 include-$(CONFIG_KASAN)         += scripts/Ma << 
1016 include-$(CONFIG_KCSAN)         += scripts/Ma << 
1017 include-$(CONFIG_KMSAN)         += scripts/Ma << 
1018 include-$(CONFIG_UBSAN)         += scripts/Ma << 
1019 include-$(CONFIG_KCOV)          += scripts/Ma << 
1020 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma << 
1021 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma << 
1022                                               << 
1023 include $(addprefix $(srctree)/, $(include-y) << 
1024                                               << 
1025 # scripts/Makefile.gcc-plugins is intentional << 
1026 # Do not add $(call cc-option,...) below this << 
1027 # from the clean source tree, the GCC plugins << 
1028                                                  939 
1029 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS  !! 940 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1030 KBUILD_CPPFLAGS += $(KCPPFLAGS)                  941 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1031 KBUILD_AFLAGS   += $(KAFLAGS)                    942 KBUILD_AFLAGS   += $(KAFLAGS)
1032 KBUILD_CFLAGS   += $(KCFLAGS)                    943 KBUILD_CFLAGS   += $(KCFLAGS)
1033 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)             << 
1034                                                  944 
1035 KBUILD_LDFLAGS_MODULE += --build-id=sha1      !! 945 KBUILD_LDFLAGS_MODULE += --build-id
1036 LDFLAGS_vmlinux += --build-id=sha1            !! 946 LDFLAGS_vmlinux += --build-id
1037                                                  947 
1038 KBUILD_LDFLAGS  += -z noexecstack                948 KBUILD_LDFLAGS  += -z noexecstack
1039 ifeq ($(CONFIG_LD_IS_BFD),y)                  << 
1040 KBUILD_LDFLAGS  += $(call ld-option,--no-warn    949 KBUILD_LDFLAGS  += $(call ld-option,--no-warn-rwx-segments)
1041 endif                                         << 
1042                                                  950 
1043 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)                951 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1044 LDFLAGS_vmlinux += -X                         !! 952 LDFLAGS_vmlinux += $(call ld-option, -X,)
1045 endif                                            953 endif
1046                                                  954 
1047 ifeq ($(CONFIG_RELR),y)                          955 ifeq ($(CONFIG_RELR),y)
1048 # ld.lld before 15 did not support -z pack-re !! 956 LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags
1049 LDFLAGS_vmlinux += $(call ld-option,--pack-dy << 
1050 endif                                            957 endif
1051                                                  958 
1052 # We never want expected sections to be place << 
1053 # linker. All sections should be explicitly n << 
1054 ifdef CONFIG_LD_ORPHAN_WARN                   << 
1055 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG << 
1056 endif                                         << 
1057                                               << 
1058 # Align the bit size of userspace programs wi << 
1059 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --ta << 
1060 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta << 
1061                                               << 
1062 # make the checker run with the right archite    959 # make the checker run with the right architecture
1063 CHECKFLAGS += --arch=$(ARCH)                     960 CHECKFLAGS += --arch=$(ARCH)
1064                                                  961 
1065 # insure the checker run with the right endia    962 # insure the checker run with the right endianness
1066 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-    963 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1067                                                  964 
1068 # the checker needs the correct machine size     965 # the checker needs the correct machine size
1069 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)    966 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1070                                                  967 
1071 # Default kernel image to build when no speci    968 # Default kernel image to build when no specific target is given.
1072 # KBUILD_IMAGE may be overruled on the comman    969 # KBUILD_IMAGE may be overruled on the command line or
1073 # set in the environment                         970 # set in the environment
1074 # Also any assignments in arch/$(ARCH)/Makefi    971 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1075 # this default value                             972 # this default value
1076 export KBUILD_IMAGE ?= vmlinux                   973 export KBUILD_IMAGE ?= vmlinux
1077                                                  974 
1078 #                                                975 #
1079 # INSTALL_PATH specifies where to place the u    976 # INSTALL_PATH specifies where to place the updated kernel and system map
1080 # images. Default is /boot, but you can set i    977 # images. Default is /boot, but you can set it to other values
1081 export  INSTALL_PATH ?= /boot                    978 export  INSTALL_PATH ?= /boot
1082                                                  979 
1083 #                                                980 #
1084 # INSTALL_DTBS_PATH specifies a prefix for re    981 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1085 # Like INSTALL_MOD_PATH, it isn't defined in     982 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1086 # an argument if needed. Otherwise it default    983 # an argument if needed. Otherwise it defaults to the kernel install path
1087 #                                                984 #
1088 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d    985 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1089                                                  986 
1090 #                                                987 #
1091 # INSTALL_MOD_PATH specifies a prefix to MODL    988 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1092 # relocations required by build roots.  This     989 # relocations required by build roots.  This is not defined in the
1093 # makefile but the argument can be passed to     990 # makefile but the argument can be passed to make if needed.
1094 #                                                991 #
1095                                                  992 
1096 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    993 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1097 export MODLIB                                    994 export MODLIB
1098                                                  995 
1099 PHONY += prepare0                             !! 996 #
                                                   >> 997 # INSTALL_MOD_STRIP, if defined, will cause modules to be
                                                   >> 998 # stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
                                                   >> 999 # the default option --strip-debug will be used.  Otherwise,
                                                   >> 1000 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
                                                   >> 1001 
                                                   >> 1002 ifdef INSTALL_MOD_STRIP
                                                   >> 1003 ifeq ($(INSTALL_MOD_STRIP),1)
                                                   >> 1004 mod_strip_cmd = $(STRIP) --strip-debug
                                                   >> 1005 else
                                                   >> 1006 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
                                                   >> 1007 endif # INSTALL_MOD_STRIP=1
                                                   >> 1008 else
                                                   >> 1009 mod_strip_cmd = true
                                                   >> 1010 endif # INSTALL_MOD_STRIP
                                                   >> 1011 export mod_strip_cmd
                                                   >> 1012 
                                                   >> 1013 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
                                                   >> 1014 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 1015 # or CONFIG_MODULE_COMPRESS_XZ.
                                                   >> 1016 
                                                   >> 1017 mod_compress_cmd = true
                                                   >> 1018 ifdef CONFIG_MODULE_COMPRESS
                                                   >> 1019   ifdef CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 1020     mod_compress_cmd = $(KGZIP) -n -f
                                                   >> 1021   endif # CONFIG_MODULE_COMPRESS_GZIP
                                                   >> 1022   ifdef CONFIG_MODULE_COMPRESS_XZ
                                                   >> 1023     mod_compress_cmd = $(XZ) -f
                                                   >> 1024   endif # CONFIG_MODULE_COMPRESS_XZ
                                                   >> 1025 endif # CONFIG_MODULE_COMPRESS
                                                   >> 1026 export mod_compress_cmd
1100                                                  1027 
1101 export extmod_prefix = $(if $(KBUILD_EXTMOD), !! 1028 ifdef CONFIG_MODULE_SIG_ALL
1102 export MODORDER := $(extmod_prefix)modules.or !! 1029 $(eval $(call config_filename,MODULE_SIG_KEY))
1103 export MODULES_NSDEPS := $(extmod_prefix)modu << 
1104                                                  1030 
1105 ifeq ($(KBUILD_EXTMOD),)                      !! 1031 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
                                                   >> 1032 else
                                                   >> 1033 mod_sign_cmd = true
                                                   >> 1034 endif
                                                   >> 1035 export mod_sign_cmd
1106                                                  1036 
1107 build-dir       := .                          !! 1037 HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1108 clean-dirs      := $(sort . Documentation \   << 
1109                      $(patsubst %/,%,$(filter << 
1110                         $(drivers-) $(libs-)) << 
1111                                               << 
1112 export ARCH_CORE        := $(core-y)          << 
1113 export ARCH_LIB         := $(filter %/, $(lib << 
1114 export ARCH_DRIVERS     := $(drivers-y) $(dri << 
1115 # Externally visible symbols (used by link-vm << 
1116                                                  1038 
1117 KBUILD_VMLINUX_OBJS := ./built-in.a           !! 1039 ifdef CONFIG_STACK_VALIDATION
1118 ifdef CONFIG_MODULES                          !! 1040   has_libelf := $(call try-run,\
1119 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a !! 1041                 echo "int main() {}" | $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1120 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib !! 1042   ifeq ($(has_libelf),1)
1121 else                                          !! 1043     objtool_target := tools/objtool FORCE
1122 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 1044   else
                                                   >> 1045     SKIP_STACK_VALIDATION := 1
                                                   >> 1046     export SKIP_STACK_VALIDATION
                                                   >> 1047   endif
1123 endif                                            1048 endif
1124                                                  1049 
1125 export KBUILD_VMLINUX_LIBS                    !! 1050 PHONY += prepare0
                                                   >> 1051 
                                                   >> 1052 export MODORDER := $(extmod-prefix)modules.order
                                                   >> 1053 
                                                   >> 1054 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 1055 core-y          += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
                                                   >> 1056 
                                                   >> 1057 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
                                                   >> 1058                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
                                                   >> 1059                      $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
                                                   >> 1060 
                                                   >> 1061 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
                                                   >> 1062                      $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
                                                   >> 1063                         $(drivers-) $(net-) $(libs-) $(virt-))))
                                                   >> 1064 
                                                   >> 1065 build-dirs      := $(vmlinux-dirs)
                                                   >> 1066 clean-dirs      := $(vmlinux-alldirs)
                                                   >> 1067 
                                                   >> 1068 init-y          := $(patsubst %/, %/built-in.a, $(init-y))
                                                   >> 1069 core-y          := $(patsubst %/, %/built-in.a, $(core-y))
                                                   >> 1070 drivers-y       := $(patsubst %/, %/built-in.a, $(drivers-y))
                                                   >> 1071 net-y           := $(patsubst %/, %/built-in.a, $(net-y))
                                                   >> 1072 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
                                                   >> 1073 libs-y2         := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
                                                   >> 1074 virt-y          := $(patsubst %/, %/built-in.a, $(virt-y))
                                                   >> 1075 
                                                   >> 1076 # Externally visible symbols (used by link-vmlinux.sh)
                                                   >> 1077 export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
                                                   >> 1078                               $(drivers-y) $(net-y) $(virt-y)
                                                   >> 1079 export KBUILD_VMLINUX_LIBS := $(libs-y1)
1126 export KBUILD_LDS          := arch/$(SRCARCH)    1080 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
                                                   >> 1081 export LDFLAGS_vmlinux
                                                   >> 1082 # used by scripts/Makefile.package
                                                   >> 1083 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
                                                   >> 1084 
                                                   >> 1085 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1127                                                  1086 
                                                   >> 1087 # Recurse until adjust_autoksyms.sh is satisfied
                                                   >> 1088 PHONY += autoksyms_recursive
1128 ifdef CONFIG_TRIM_UNUSED_KSYMS                   1089 ifdef CONFIG_TRIM_UNUSED_KSYMS
                                                   >> 1090 autoksyms_recursive: descend modules.order
                                                   >> 1091         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
                                                   >> 1092           "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
                                                   >> 1093 endif
                                                   >> 1094 
1129 # For the kernel to actually contain only the    1095 # For the kernel to actually contain only the needed exported symbols,
1130 # we have to build modules as well to determi    1096 # we have to build modules as well to determine what those symbols are.
1131 KBUILD_MODULES := 1                           !! 1097 # (this can be evaluated only once include/config/auto.conf has been included)
                                                   >> 1098 ifdef CONFIG_TRIM_UNUSED_KSYMS
                                                   >> 1099   KBUILD_MODULES := 1
1132 endif                                            1100 endif
1133                                                  1101 
1134 # '$(AR) mPi' needs 'T' to workaround the bug !! 1102 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1135 quiet_cmd_ar_vmlinux.a = AR      $@           << 
1136       cmd_ar_vmlinux.a = \                    << 
1137         rm -f $@; \                           << 
1138         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 
1139         $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 
1140                                               << 
1141 targets += vmlinux.a                          << 
1142 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 
1143         $(call if_changed,ar_vmlinux.a)       << 
1144                                               << 
1145 PHONY += vmlinux_o                            << 
1146 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)   << 
1147         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1148                                                  1103 
1149 vmlinux.o modules.builtin.modinfo modules.bui !! 1104 $(autoksyms_h):
1150         @:                                    !! 1105         $(Q)mkdir -p $(dir $@)
                                                   >> 1106         $(Q)touch $@
                                                   >> 1107 
                                                   >> 1108 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
                                                   >> 1109 
                                                   >> 1110 # Final link of vmlinux with optional arch pass after final link
                                                   >> 1111 cmd_link-vmlinux =                                                 \
                                                   >> 1112         $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ;    \
                                                   >> 1113         $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
                                                   >> 1114 
                                                   >> 1115 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
                                                   >> 1116         +$(call if_changed,link-vmlinux)
1151                                                  1117 
1152 PHONY += vmlinux                              !! 1118 targets := vmlinux
1153 # LDFLAGS_vmlinux in the top Makefile defines << 
1154 # not for decompressors. LDFLAGS_vmlinux in a << 
1155 # unrelated; the decompressors just happen to << 
1156 # arch/*/boot/compressed/vmlinux.             << 
1157 # Export LDFLAGS_vmlinux only to scripts/Make << 
1158 #                                             << 
1159 # _LDFLAGS_vmlinux is a workaround for the 'p << 
1160 #   https://savannah.gnu.org/bugs/?61463      << 
1161 # For Make > 4.4, the following simple code w << 
1162 #  vmlinux: private export LDFLAGS_vmlinux := << 
1163 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 
1164 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 
1165 vmlinux: vmlinux.o $(KBUILD_LDS) modpost      << 
1166         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1167                                                  1119 
1168 # The actual objects are generated when desce    1120 # The actual objects are generated when descending,
1169 # make sure no implicit rule kicks in            1121 # make sure no implicit rule kicks in
1170 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 1122 $(sort $(vmlinux-deps)): descend ;
1171                                                  1123 
1172 ifeq ($(origin KERNELRELEASE),file)           !! 1124 filechk_kernel.release = \
1173 filechk_kernel.release = $(srctree)/scripts/s !! 1125         echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1174 else                                          << 
1175 filechk_kernel.release = echo $(KERNELRELEASE << 
1176 endif                                         << 
1177                                                  1126 
1178 # Store (new) KERNELRELEASE string in include    1127 # Store (new) KERNELRELEASE string in include/config/kernel.release
1179 include/config/kernel.release: FORCE             1128 include/config/kernel.release: FORCE
1180         $(call filechk,kernel.release)           1129         $(call filechk,kernel.release)
1181                                                  1130 
1182 # Additional helpers built in scripts/           1131 # Additional helpers built in scripts/
1183 # Carefully list dependencies so we do not tr    1132 # Carefully list dependencies so we do not try to build scripts twice
1184 # in parallel                                    1133 # in parallel
1185 PHONY += scripts                                 1134 PHONY += scripts
1186 scripts: scripts_basic scripts_dtc               1135 scripts: scripts_basic scripts_dtc
1187         $(Q)$(MAKE) $(build)=$(@)                1136         $(Q)$(MAKE) $(build)=$(@)
1188                                                  1137 
1189 # Things we need to do before we recursively     1138 # Things we need to do before we recursively start building the kernel
1190 # or the modules are listed in "prepare".        1139 # or the modules are listed in "prepare".
1191 # A multi level approach is used. prepareN is    1140 # A multi level approach is used. prepareN is processed before prepareN-1.
1192 # archprepare is used in arch Makefiles and w    1141 # archprepare is used in arch Makefiles and when processed asm symlink,
1193 # version.h and scripts_basic is processed /     1142 # version.h and scripts_basic is processed / created.
1194                                                  1143 
1195 PHONY += prepare archprepare                     1144 PHONY += prepare archprepare
1196                                                  1145 
1197 archprepare: outputmakefile archheaders archs    1146 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1198         asm-generic $(version_h) include/gene !! 1147         asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
1199         include/generated/compile.h include/g << 
1200                                                  1148 
1201 prepare0: archprepare                            1149 prepare0: archprepare
1202         $(Q)$(MAKE) $(build)=scripts/mod         1150         $(Q)$(MAKE) $(build)=scripts/mod
1203         $(Q)$(MAKE) $(build)=. prepare        !! 1151         $(Q)$(MAKE) $(build)=.
1204                                                  1152 
1205 # All the preparing..                            1153 # All the preparing..
1206 prepare: prepare0                             !! 1154 prepare: prepare0 prepare-objtool
1207 ifdef CONFIG_RUST                             << 
1208         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1209         $(Q)$(MAKE) $(build)=rust             << 
1210 endif                                         << 
1211                                               << 
1212 PHONY += remove-stale-files                   << 
1213 remove-stale-files:                           << 
1214         $(Q)$(srctree)/scripts/remove-stale-f << 
1215                                                  1155 
1216 # Support for using generic headers in asm-ge    1156 # Support for using generic headers in asm-generic
1217 asm-generic := -f $(srctree)/scripts/Makefile !! 1157 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1218                                                  1158 
1219 PHONY += asm-generic uapi-asm-generic            1159 PHONY += asm-generic uapi-asm-generic
1220 asm-generic: uapi-asm-generic                    1160 asm-generic: uapi-asm-generic
1221         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1161         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1222         generic=include/asm-generic              1162         generic=include/asm-generic
1223 uapi-asm-generic:                                1163 uapi-asm-generic:
1224         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    1164         $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1225         generic=include/uapi/asm-generic         1165         generic=include/uapi/asm-generic
1226                                                  1166 
                                                   >> 1167 PHONY += prepare-objtool
                                                   >> 1168 prepare-objtool: $(objtool_target)
                                                   >> 1169 ifeq ($(SKIP_STACK_VALIDATION),1)
                                                   >> 1170 ifdef CONFIG_UNWINDER_ORC
                                                   >> 1171         @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
                                                   >> 1172         @false
                                                   >> 1173 else
                                                   >> 1174         @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
                                                   >> 1175 endif
                                                   >> 1176 endif
                                                   >> 1177 
1227 # Generate some files                            1178 # Generate some files
1228 # -------------------------------------------    1179 # ---------------------------------------------------------------------------
1229                                                  1180 
1230 # KERNELRELEASE can change from a few differe    1181 # KERNELRELEASE can change from a few different places, meaning version.h
1231 # needs to be updated, so this check is force    1182 # needs to be updated, so this check is forced on all builds
1232                                                  1183 
1233 uts_len := 64                                    1184 uts_len := 64
1234 define filechk_utsrelease.h                      1185 define filechk_utsrelease.h
1235         if [ `echo -n "$(KERNELRELEASE)" | wc    1186         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1236           echo '"$(KERNELRELEASE)" exceeds $(    1187           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1237           exit 1;                                1188           exit 1;                                                         \
1238         fi;                                      1189         fi;                                                               \
1239         echo \#define UTS_RELEASE \"$(KERNELR    1190         echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1240 endef                                            1191 endef
1241                                                  1192 
1242 define filechk_version.h                         1193 define filechk_version.h
1243         if [ $(SUBLEVEL) -gt 255 ]; then         1194         if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1244                 echo \#define LINUX_VERSION_C    1195                 echo \#define LINUX_VERSION_CODE $(shell                 \
1245                 expr $(VERSION) \* 65536 + $(    1196                 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1246         else                                     1197         else                                                             \
1247                 echo \#define LINUX_VERSION_C    1198                 echo \#define LINUX_VERSION_CODE $(shell                 \
1248                 expr $(VERSION) \* 65536 + $(    1199                 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1249         fi;                                      1200         fi;                                                              \
1250         echo '#define KERNEL_VERSION(a,b,c) (    1201         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
1251         ((c) > 255 ? 255 : (c)))';            !! 1202         ((c) > 255 ? 255 : (c)))'
1252         echo \#define LINUX_VERSION_MAJOR $(V << 
1253         echo \#define LINUX_VERSION_PATCHLEVE << 
1254         echo \#define LINUX_VERSION_SUBLEVEL  << 
1255 endef                                            1203 endef
1256                                                  1204 
1257 $(version_h): private PATCHLEVEL := $(or $(PA !! 1205 $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1258 $(version_h): private SUBLEVEL := $(or $(SUBL !! 1206 $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
1259 $(version_h): FORCE                              1207 $(version_h): FORCE
1260         $(call filechk,version.h)                1208         $(call filechk,version.h)
                                                   >> 1209         $(Q)rm -f $(old_version_h)
1261                                                  1210 
1262 include/generated/utsrelease.h: include/confi    1211 include/generated/utsrelease.h: include/config/kernel.release FORCE
1263         $(call filechk,utsrelease.h)             1212         $(call filechk,utsrelease.h)
1264                                                  1213 
1265 filechk_compile.h = $(srctree)/scripts/mkcomp << 
1266         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 
1267                                               << 
1268 include/generated/compile.h: FORCE            << 
1269         $(call filechk,compile.h)             << 
1270                                               << 
1271 PHONY += headerdep                               1214 PHONY += headerdep
1272 headerdep:                                       1215 headerdep:
1273         $(Q)find $(srctree)/include/ -name '*    1216         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1274         $(srctree)/scripts/headerdep.pl -I$(s    1217         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1275                                                  1218 
1276 # -------------------------------------------    1219 # ---------------------------------------------------------------------------
1277 # Kernel headers                                 1220 # Kernel headers
1278                                                  1221 
1279 #Default location for installed headers          1222 #Default location for installed headers
1280 export INSTALL_HDR_PATH = $(objtree)/usr         1223 export INSTALL_HDR_PATH = $(objtree)/usr
1281                                                  1224 
1282 quiet_cmd_headers_install = INSTALL $(INSTALL    1225 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1283       cmd_headers_install = \                    1226       cmd_headers_install = \
1284         mkdir -p $(INSTALL_HDR_PATH); \          1227         mkdir -p $(INSTALL_HDR_PATH); \
1285         rsync -mrl --include='*/' --include='    1228         rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1286         usr/include $(INSTALL_HDR_PATH)          1229         usr/include $(INSTALL_HDR_PATH)
1287                                                  1230 
1288 PHONY += headers_install                         1231 PHONY += headers_install
1289 headers_install: headers                         1232 headers_install: headers
1290         $(call cmd,headers_install)              1233         $(call cmd,headers_install)
1291                                                  1234 
1292 PHONY += archheaders archscripts                 1235 PHONY += archheaders archscripts
1293                                                  1236 
1294 hdr-inst := -f $(srctree)/scripts/Makefile.he    1237 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1295                                                  1238 
1296 PHONY += headers                                 1239 PHONY += headers
1297 headers: $(version_h) scripts_unifdef uapi-as    1240 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1298         $(if $(filter um, $(SRCARCH)), $(erro !! 1241         $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
                                                   >> 1242           $(error Headers not exportable for the $(SRCARCH) architecture))
1299         $(Q)$(MAKE) $(hdr-inst)=include/uapi     1243         $(Q)$(MAKE) $(hdr-inst)=include/uapi
1300         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC    1244         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1301                                                  1245 
                                                   >> 1246 # Deprecated. It is no-op now.
                                                   >> 1247 PHONY += headers_check
                                                   >> 1248 headers_check:
                                                   >> 1249         @:
                                                   >> 1250 
1302 ifdef CONFIG_HEADERS_INSTALL                     1251 ifdef CONFIG_HEADERS_INSTALL
1303 prepare: headers                                 1252 prepare: headers
1304 endif                                            1253 endif
1305                                                  1254 
1306 PHONY += scripts_unifdef                         1255 PHONY += scripts_unifdef
1307 scripts_unifdef: scripts_basic                   1256 scripts_unifdef: scripts_basic
1308         $(Q)$(MAKE) $(build)=scripts scripts/    1257         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1309                                                  1258 
1310 # -------------------------------------------    1259 # ---------------------------------------------------------------------------
1311 # Install                                     << 
1312                                               << 
1313 # Many distributions have the custom install  << 
1314 # If DKMS is installed, 'make install' will e << 
1315 # to this Makefile to build and install exter << 
1316 # Cancel sub_make_done so that options such a << 
1317                                               << 
1318 quiet_cmd_install = INSTALL $(INSTALL_PATH)   << 
1319       cmd_install = unset sub_make_done; $(sr << 
1320                                               << 
1321 # ------------------------------------------- << 
1322 # vDSO install                                << 
1323                                               << 
1324 PHONY += vdso_install                         << 
1325 vdso_install: export INSTALL_FILES = $(vdso-i << 
1326 vdso_install:                                 << 
1327         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1328                                               << 
1329 # ------------------------------------------- << 
1330 # Tools                                       << 
1331                                               << 
1332 ifdef CONFIG_OBJTOOL                          << 
1333 prepare: tools/objtool                        << 
1334 endif                                         << 
1335                                               << 
1336 ifdef CONFIG_BPF                              << 
1337 ifdef CONFIG_DEBUG_INFO_BTF                   << 
1338 prepare: tools/bpf/resolve_btfids             << 
1339 endif                                         << 
1340 endif                                         << 
1341                                               << 
1342 # The tools build system is not a part of Kbu << 
1343 # its own unique issues. If you need to integ << 
1344 # please consider locating that tool outside  << 
1345 # standard Kbuild "hostprogs" syntax instead  << 
1346 # here. See Documentation/kbuild/makefiles.rs << 
1347                                               << 
1348 PHONY += resolve_btfids_clean                 << 
1349                                               << 
1350 resolve_btfids_O = $(abspath $(objtree))/tool << 
1351                                               << 
1352 # tools/bpf/resolve_btfids directory might no << 
1353 # in output directory, skip its clean in that << 
1354 resolve_btfids_clean:                         << 
1355 ifneq ($(wildcard $(resolve_btfids_O)),)      << 
1356         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ << 
1357 endif                                         << 
1358                                               << 
1359 # Clear a bunch of variables before executing << 
1360 ifeq ($(quiet),silent_)                       << 
1361 tools_silent=s                                << 
1362 endif                                         << 
1363                                               << 
1364 tools/: FORCE                                 << 
1365         $(Q)mkdir -p $(objtree)/tools         << 
1366         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1367                                               << 
1368 tools/%: FORCE                                << 
1369         $(Q)mkdir -p $(objtree)/tools         << 
1370         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1371                                               << 
1372 # ------------------------------------------- << 
1373 # Kernel selftest                                1260 # Kernel selftest
1374                                                  1261 
1375 PHONY += kselftest                               1262 PHONY += kselftest
1376 kselftest: headers                            !! 1263 kselftest:
1377         $(Q)$(MAKE) -C $(srctree)/tools/testi    1264         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1378                                                  1265 
1379 kselftest-%: headers FORCE                    !! 1266 kselftest-%: FORCE
1380         $(Q)$(MAKE) -C $(srctree)/tools/testi    1267         $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1381                                                  1268 
1382 PHONY += kselftest-merge                         1269 PHONY += kselftest-merge
1383 kselftest-merge:                                 1270 kselftest-merge:
1384         $(if $(wildcard $(objtree)/.config),,    1271         $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1385         $(Q)find $(srctree)/tools/testing/sel !! 1272         $(Q)find $(srctree)/tools/testing/selftests -name config | \
1386                 xargs $(srctree)/scripts/kcon !! 1273                 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1387         $(Q)$(MAKE) -f $(srctree)/Makefile ol    1274         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1388                                                  1275 
1389 # -------------------------------------------    1276 # ---------------------------------------------------------------------------
1390 # Devicetree files                               1277 # Devicetree files
1391                                                  1278 
1392 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/    1279 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1393 dtstree := arch/$(SRCARCH)/boot/dts              1280 dtstree := arch/$(SRCARCH)/boot/dts
1394 endif                                            1281 endif
1395                                                  1282 
1396 ifneq ($(dtstree),)                              1283 ifneq ($(dtstree),)
1397                                                  1284 
1398 %.dtb: dtbs_prepare                           !! 1285 %.dtb: include/config/kernel.release scripts_dtc
1399         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1400                                               << 
1401 %.dtbo: dtbs_prepare                          << 
1402         $(Q)$(MAKE) $(build)=$(dtstree) $(dts    1286         $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1403                                                  1287 
1404 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ !! 1288 PHONY += dtbs dtbs_install dtbs_check
1405 dtbs: dtbs_prepare                            !! 1289 dtbs: include/config/kernel.release scripts_dtc
1406         $(Q)$(MAKE) $(build)=$(dtstree) need- !! 1290         $(Q)$(MAKE) $(build)=$(dtstree)
1407                                               << 
1408 # include/config/kernel.release is actually n << 
1409 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) << 
1410 # dtbs_install depend on it as dtbs_install m << 
1411 dtbs_prepare: include/config/kernel.release s << 
1412                                                  1291 
1413 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),    1292 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1414 export CHECK_DTBS=y                           !! 1293 dtbs: dt_binding_check
1415 endif                                         << 
1416                                               << 
1417 ifneq ($(CHECK_DTBS),)                        << 
1418 dtbs_prepare: dt_binding_schemas              << 
1419 endif                                            1294 endif
1420                                                  1295 
                                                   >> 1296 dtbs_check: export CHECK_DTBS=1
1421 dtbs_check: dtbs                                 1297 dtbs_check: dtbs
1422                                                  1298 
1423 dtbs_install:                                    1299 dtbs_install:
1424         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1300         $(Q)$(MAKE) $(dtbinst)=$(dtstree)
1425                                                  1301 
1426 ifdef CONFIG_OF_EARLY_FLATTREE                   1302 ifdef CONFIG_OF_EARLY_FLATTREE
1427 all: dtbs                                        1303 all: dtbs
1428 endif                                            1304 endif
1429                                                  1305 
1430 endif                                            1306 endif
1431                                                  1307 
1432 PHONY += scripts_dtc                             1308 PHONY += scripts_dtc
1433 scripts_dtc: scripts_basic                       1309 scripts_dtc: scripts_basic
1434         $(Q)$(MAKE) $(build)=scripts/dtc         1310         $(Q)$(MAKE) $(build)=scripts/dtc
1435                                                  1311 
1436 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1312 PHONY += dt_binding_check
1437 export CHECK_DTBS=y                           !! 1313 dt_binding_check: scripts_dtc
1438 endif                                         << 
1439                                               << 
1440 PHONY += dt_binding_check dt_binding_schemas  << 
1441 dt_binding_check: dt_binding_schemas scripts_ << 
1442         $(Q)$(MAKE) $(build)=Documentation/de << 
1443                                               << 
1444 dt_binding_schemas:                           << 
1445         $(Q)$(MAKE) $(build)=Documentation/de    1314         $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1446                                                  1315 
1447 PHONY += dt_compatible_check                  << 
1448 dt_compatible_check: dt_binding_schemas       << 
1449         $(Q)$(MAKE) $(build)=Documentation/de << 
1450                                               << 
1451 # -------------------------------------------    1316 # ---------------------------------------------------------------------------
1452 # Modules                                        1317 # Modules
1453                                                  1318 
1454 ifdef CONFIG_MODULES                             1319 ifdef CONFIG_MODULES
1455                                                  1320 
1456 # By default, build modules as well              1321 # By default, build modules as well
1457                                                  1322 
1458 all: modules                                     1323 all: modules
1459                                                  1324 
1460 # When we're building modules with modversion    1325 # When we're building modules with modversions, we need to consider
1461 # the built-in objects during the descend as     1326 # the built-in objects during the descend as well, in order to
1462 # make sure the checksums are up to date befo    1327 # make sure the checksums are up to date before we record them.
1463 ifdef CONFIG_MODVERSIONS                         1328 ifdef CONFIG_MODVERSIONS
1464   KBUILD_BUILTIN := 1                            1329   KBUILD_BUILTIN := 1
1465 endif                                            1330 endif
1466                                                  1331 
1467 # Build modules                                  1332 # Build modules
1468 #                                                1333 #
                                                   >> 1334 # A module can be listed more than once in obj-m resulting in
                                                   >> 1335 # duplicate lines in modules.order files.  Those are removed
                                                   >> 1336 # using awk while concatenating to the final file.
1469                                                  1337 
1470 # *.ko are usually independent of vmlinux, bu !! 1338 PHONY += modules
1471 # is an exception.                            !! 1339 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
1472 ifdef CONFIG_DEBUG_INFO_BTF_MODULES           !! 1340         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1473 KBUILD_BUILTIN := 1                           !! 1341         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
1474 modules: vmlinux                              !! 1342 
1475 endif                                         !! 1343 modules.order: descend
                                                   >> 1344         $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
                                                   >> 1345 
                                                   >> 1346 modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs))
1476                                                  1347 
1477 modules: modules_prepare                      !! 1348 modules.builtin: $(modbuiltin-dirs)
                                                   >> 1349         $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
                                                   >> 1350 
                                                   >> 1351 PHONY += $(modbuiltin-dirs)
                                                   >> 1352 # tristate.conf is not included from this Makefile. Add it as a prerequisite
                                                   >> 1353 # here to make it self-healing in case somebody accidentally removes it.
                                                   >> 1354 $(modbuiltin-dirs): include/config/tristate.conf
                                                   >> 1355         $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
1478                                                  1356 
1479 # Target to prepare building external modules    1357 # Target to prepare building external modules
                                                   >> 1358 PHONY += modules_prepare
1480 modules_prepare: prepare                         1359 modules_prepare: prepare
1481         $(Q)$(MAKE) $(build)=scripts scripts/ !! 1360 
                                                   >> 1361 # Target to install modules
                                                   >> 1362 PHONY += modules_install
                                                   >> 1363 modules_install: _modinst_ _modinst_post
                                                   >> 1364 
                                                   >> 1365 PHONY += _modinst_
                                                   >> 1366 _modinst_:
                                                   >> 1367         @rm -rf $(MODLIB)/kernel
                                                   >> 1368         @rm -f $(MODLIB)/source
                                                   >> 1369         @mkdir -p $(MODLIB)/kernel
                                                   >> 1370         @ln -s $(abspath $(srctree)) $(MODLIB)/source
                                                   >> 1371         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                                                   >> 1372                 rm -f $(MODLIB)/build ; \
                                                   >> 1373                 ln -s $(CURDIR) $(MODLIB)/build ; \
                                                   >> 1374         fi
                                                   >> 1375         @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
                                                   >> 1376         @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin
                                                   >> 1377         @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
                                                   >> 1378         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1379 
                                                   >> 1380 # This depmod is only for convenience to give the initial
                                                   >> 1381 # boot a modules.dep even before / is mounted read-write.  However the
                                                   >> 1382 # boot script depmod is the master version.
                                                   >> 1383 PHONY += _modinst_post
                                                   >> 1384 _modinst_post: _modinst_
                                                   >> 1385         $(call cmd,depmod)
                                                   >> 1386 
                                                   >> 1387 ifeq ($(CONFIG_MODULE_SIG), y)
                                                   >> 1388 PHONY += modules_sign
                                                   >> 1389 modules_sign:
                                                   >> 1390         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
                                                   >> 1391 endif
                                                   >> 1392 
                                                   >> 1393 else # CONFIG_MODULES
                                                   >> 1394 
                                                   >> 1395 # Modules not configured
                                                   >> 1396 # ---------------------------------------------------------------------------
                                                   >> 1397 
                                                   >> 1398 PHONY += modules modules_install
                                                   >> 1399 modules modules_install:
                                                   >> 1400         @echo >&2
                                                   >> 1401         @echo >&2 "The present kernel configuration has modules disabled."
                                                   >> 1402         @echo >&2 "Type 'make config' and enable loadable module support."
                                                   >> 1403         @echo >&2 "Then build a kernel with module support enabled."
                                                   >> 1404         @echo >&2
                                                   >> 1405         @exit 1
1482                                                  1406 
1483 endif # CONFIG_MODULES                           1407 endif # CONFIG_MODULES
1484                                                  1408 
1485 ###                                              1409 ###
1486 # Cleaning is done on three levels.              1410 # Cleaning is done on three levels.
1487 # make clean     Delete most generated files     1411 # make clean     Delete most generated files
1488 #                Leave enough to build extern    1412 #                Leave enough to build external modules
1489 # make mrproper  Delete the current configura    1413 # make mrproper  Delete the current configuration, and all generated files
1490 # make distclean Remove editor backup files,     1414 # make distclean Remove editor backup files, patch leftover files and the like
1491                                                  1415 
1492 # Directories & files removed with 'make clea    1416 # Directories & files removed with 'make clean'
1493 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1417 CLEAN_DIRS  += include/ksym
1494                modules.builtin modules.builti !! 1418 CLEAN_FILES += modules.builtin.modinfo
1495                modules.builtin.ranges vmlinux << 
1496                compile_commands.json rust/tes << 
1497                rust-project.json .vmlinux.obj << 
1498                                                  1419 
1499 # Directories & files removed with 'make mrpr    1420 # Directories & files removed with 'make mrproper'
1500 MRPROPER_FILES += include/config include/gene !! 1421 MRPROPER_DIRS  += include/config include/generated          \
1501                   arch/$(SRCARCH)/include/gen !! 1422                   arch/$(SRCARCH)/include/generated .tmp_objdiff \
1502                   debian snap tar-install PKG !! 1423                   debian/ snap/ tar-install/
1503                   .config .config.old .versio !! 1424 MRPROPER_FILES += .config .config.old .version \
1504                   Module.symvers \               1425                   Module.symvers \
1505                   certs/signing_key.pem \     !! 1426                   signing_key.pem signing_key.priv signing_key.x509     \
1506                   certs/x509.genkey \         !! 1427                   x509.genkey extra_certificates signing_key.x509.keyid \
1507                   vmlinux-gdb.py \            !! 1428                   signing_key.x509.signer vmlinux-gdb.py \
1508                   rpmbuild \                  !! 1429                   *.spec
1509                   rust/libmacros.so           !! 1430 
                                                   >> 1431 # Directories & files removed with 'make distclean'
                                                   >> 1432 DISTCLEAN_DIRS  +=
                                                   >> 1433 DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1510                                                  1434 
1511 # clean - Delete most, but leave enough to bu    1435 # clean - Delete most, but leave enough to build external modules
1512 #                                                1436 #
1513 clean: private rm-files := $(CLEAN_FILES)     !! 1437 clean: rm-dirs  := $(CLEAN_DIRS)
                                                   >> 1438 clean: rm-files := $(CLEAN_FILES)
1514                                                  1439 
1515 PHONY += archclean vmlinuxclean                  1440 PHONY += archclean vmlinuxclean
1516                                                  1441 
1517 vmlinuxclean:                                    1442 vmlinuxclean:
1518         $(Q)$(CONFIG_SHELL) $(srctree)/script    1443         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1519         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f    1444         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1520                                                  1445 
1521 clean: archclean vmlinuxclean resolve_btfids_ !! 1446 clean: archclean vmlinuxclean
1522                                                  1447 
1523 # mrproper - Delete all generated files, incl    1448 # mrproper - Delete all generated files, including .config
1524 #                                                1449 #
1525 mrproper: private rm-files := $(MRPROPER_FILE !! 1450 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
                                                   >> 1451 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1526 mrproper-dirs      := $(addprefix _mrproper_,    1452 mrproper-dirs      := $(addprefix _mrproper_,scripts)
1527                                                  1453 
1528 PHONY += $(mrproper-dirs) mrproper               1454 PHONY += $(mrproper-dirs) mrproper
1529 $(mrproper-dirs):                                1455 $(mrproper-dirs):
1530         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    1456         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1531                                                  1457 
1532 mrproper: clean $(mrproper-dirs)                 1458 mrproper: clean $(mrproper-dirs)
                                                   >> 1459         $(call cmd,rmdirs)
1533         $(call cmd,rmfiles)                      1460         $(call cmd,rmfiles)
1534         @find . $(RCS_FIND_IGNORE) \          << 
1535                 \( -name '*.rmeta' \) \       << 
1536                 -type f -print | xargs rm -f  << 
1537                                                  1461 
1538 # distclean                                      1462 # distclean
1539 #                                                1463 #
                                                   >> 1464 distclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
                                                   >> 1465 distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
                                                   >> 1466 
1540 PHONY += distclean                               1467 PHONY += distclean
1541                                                  1468 
1542 distclean: mrproper                              1469 distclean: mrproper
1543         @find . $(RCS_FIND_IGNORE) \          !! 1470         $(call cmd,rmdirs)
                                                   >> 1471         $(call cmd,rmfiles)
                                                   >> 1472         @find $(srctree) $(RCS_FIND_IGNORE) \
1544                 \( -name '*.orig' -o -name '*    1473                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1545                 -o -name '*.bak' -o -name '#*    1474                 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1546                 -o -name 'core' -o -name tags !! 1475                 -o -name 'core' \) \
1547                 -o -name GPATH -o -name GRTAG << 
1548                 -type f -print | xargs rm -f     1476                 -type f -print | xargs rm -f
1549                                                  1477 
1550                                                  1478 
1551 # Packaging of the kernel to various formats     1479 # Packaging of the kernel to various formats
1552 # -------------------------------------------    1480 # ---------------------------------------------------------------------------
1553                                                  1481 
1554 %src-pkg: FORCE                                  1482 %src-pkg: FORCE
1555         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1483         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1556 %pkg: include/config/kernel.release FORCE        1484 %pkg: include/config/kernel.release FORCE
1557         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    1485         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1558                                                  1486 
1559 # Brief documentation of the typical targets     1487 # Brief documentation of the typical targets used
1560 # -------------------------------------------    1488 # ---------------------------------------------------------------------------
1561                                                  1489 
1562 boards := $(wildcard $(srctree)/arch/$(SRCARC    1490 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1563 boards := $(sort $(notdir $(boards)))            1491 boards := $(sort $(notdir $(boards)))
1564 board-dirs := $(dir $(wildcard $(srctree)/arc    1492 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1565 board-dirs := $(sort $(notdir $(board-dirs:/=    1493 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1566                                                  1494 
1567 PHONY += help                                    1495 PHONY += help
1568 help:                                            1496 help:
1569         @echo  'Cleaning targets:'               1497         @echo  'Cleaning targets:'
1570         @echo  '  clean           - Remove mo    1498         @echo  '  clean           - Remove most generated files but keep the config and'
1571         @echo  '                    enough bu    1499         @echo  '                    enough build support to build external modules'
1572         @echo  '  mrproper        - Remove al    1500         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1573         @echo  '  distclean       - mrproper     1501         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1574         @echo  ''                                1502         @echo  ''
                                                   >> 1503         @echo  'Configuration targets:'
1575         @$(MAKE) -f $(srctree)/scripts/kconfi    1504         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1576         @echo  ''                                1505         @echo  ''
1577         @echo  'Other generic targets:'          1506         @echo  'Other generic targets:'
1578         @echo  '  all             - Build all    1507         @echo  '  all             - Build all targets marked with [*]'
1579         @echo  '* vmlinux         - Build the    1508         @echo  '* vmlinux         - Build the bare kernel'
1580         @echo  '* modules         - Build all    1509         @echo  '* modules         - Build all modules'
1581         @echo  '  modules_install - Install a    1510         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1582         @echo  '  vdso_install    - Install u << 
1583         @echo  '  dir/            - Build all    1511         @echo  '  dir/            - Build all files in dir and below'
1584         @echo  '  dir/file.[ois]  - Build spe    1512         @echo  '  dir/file.[ois]  - Build specified target only'
1585         @echo  '  dir/file.ll     - Build the    1513         @echo  '  dir/file.ll     - Build the LLVM assembly file'
1586         @echo  '                    (requires    1514         @echo  '                    (requires compiler support for LLVM assembly generation)'
1587         @echo  '  dir/file.lst    - Build spe    1515         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1588         @echo  '                    (requires    1516         @echo  '                    (requires a recent binutils and recent build (System.map))'
1589         @echo  '  dir/file.ko     - Build mod    1517         @echo  '  dir/file.ko     - Build module including final link'
1590         @echo  '  modules_prepare - Set up fo    1518         @echo  '  modules_prepare - Set up for building external modules'
1591         @echo  '  tags/TAGS       - Generate     1519         @echo  '  tags/TAGS       - Generate tags file for editors'
1592         @echo  '  cscope          - Generate     1520         @echo  '  cscope          - Generate cscope index'
1593         @echo  '  gtags           - Generate     1521         @echo  '  gtags           - Generate GNU GLOBAL index'
1594         @echo  '  kernelrelease   - Output th    1522         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
1595         @echo  '  kernelversion   - Output th    1523         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
1596         @echo  '  image_name      - Output th    1524         @echo  '  image_name      - Output the image name (use with make -s)'
1597         @echo  '  headers_install - Install s    1525         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1598          echo  '                    (default:    1526          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1599          echo  ''                                1527          echo  ''
1600         @echo  'Static analysers:'               1528         @echo  'Static analysers:'
1601         @echo  '  checkstack      - Generate  !! 1529         @echo  '  checkstack      - Generate a list of stack hogs'
1602         @echo  '                    with a st !! 1530         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1603         @echo  '  versioncheck    - Sanity ch    1531         @echo  '  versioncheck    - Sanity check on version.h usage'
1604         @echo  '  includecheck    - Check for    1532         @echo  '  includecheck    - Check for duplicate included header files'
1605         @echo  '  export_report   - List the     1533         @echo  '  export_report   - List the usages of all exported symbols'
1606         @echo  '  headerdep       - Detect in    1534         @echo  '  headerdep       - Detect inclusion cycles in headers'
1607         @echo  '  coccicheck      - Check wit    1535         @echo  '  coccicheck      - Check with Coccinelle'
1608         @echo  '  clang-analyzer  - Check wit << 
1609         @echo  '  clang-tidy      - Check wit << 
1610         @echo  ''                                1536         @echo  ''
1611         @echo  'Tools:'                          1537         @echo  'Tools:'
1612         @echo  '  nsdeps          - Generate     1538         @echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1613         @echo  ''                                1539         @echo  ''
1614         @echo  'Kernel selftest:'                1540         @echo  'Kernel selftest:'
1615         @echo  '  kselftest         - Build a !! 1541         @echo  '  kselftest       - Build and run kernel selftest (run as root)'
1616         @echo  '                      Build,  !! 1542         @echo  '                    Build, install, and boot kernel before'
1617         @echo  '                      running !! 1543         @echo  '                    running kselftest on it'
1618         @echo  '                      Run as  !! 1544         @echo  '  kselftest-clean - Remove all generated kselftest files'
1619         @echo  '  kselftest-all     - Build k !! 1545         @echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
1620         @echo  '  kselftest-install - Build a !! 1546         @echo  '                    .config.'
1621         @echo  '  kselftest-clean   - Remove  << 
1622         @echo  '  kselftest-merge   - Merge a << 
1623         @echo  '                      kselfte << 
1624         @echo  ''                             << 
1625         @echo  'Rust targets:'                << 
1626         @echo  '  rustavailable   - Checks wh << 
1627         @echo  '                    available << 
1628         @echo  '  rustfmt         - Reformat  << 
1629         @echo  '  rustfmtcheck    - Checks if << 
1630         @echo  '                    is format << 
1631         @echo  '  rustdoc         - Generate  << 
1632         @echo  '                    (requires << 
1633         @echo  '  rusttest        - Runs the  << 
1634         @echo  '                    (requires << 
1635         @echo  '  rust-analyzer   - Generate  << 
1636         @echo  '                    (requires << 
1637         @echo  '  dir/file.[os]   - Build spe << 
1638         @echo  '  dir/file.rsi    - Build mac << 
1639         @echo  '                    Run with  << 
1640         @echo  '                    The outpu << 
1641         @echo  '  dir/file.ll     - Build the << 
1642         @echo  ''                                1547         @echo  ''
1643         @$(if $(dtstree), \                      1548         @$(if $(dtstree), \
1644                 echo 'Devicetree:'; \            1549                 echo 'Devicetree:'; \
1645                 echo '* dtbs               -  !! 1550                 echo '* dtbs             - Build device tree blobs for enabled boards'; \
1646                 echo '  dtbs_install       -  !! 1551                 echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1647                 echo '  dt_binding_check   -  !! 1552                 echo '  dt_binding_check - Validate device tree binding documents'; \
1648                 echo '  dt_binding_schemas -  !! 1553                 echo '  dtbs_check       - Validate device tree source files';\
1649                 echo '  dtbs_check         -  << 
1650                 echo '')                         1554                 echo '')
1651                                                  1555 
1652         @echo 'Userspace tools targets:'         1556         @echo 'Userspace tools targets:'
1653         @echo '  use "make tools/help"'          1557         @echo '  use "make tools/help"'
1654         @echo '  or  "cd tools; make help"'      1558         @echo '  or  "cd tools; make help"'
1655         @echo  ''                                1559         @echo  ''
1656         @echo  'Kernel packaging:'               1560         @echo  'Kernel packaging:'
1657         @$(MAKE) -f $(srctree)/scripts/Makefi    1561         @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1658         @echo  ''                                1562         @echo  ''
1659         @echo  'Documentation targets:'          1563         @echo  'Documentation targets:'
1660         @$(MAKE) -f $(srctree)/Documentation/    1564         @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1661         @echo  ''                                1565         @echo  ''
1662         @echo  'Architecture-specific targets !! 1566         @echo  'Architecture specific targets ($(SRCARCH)):'
1663         @$(or $(archhelp),\                   !! 1567         @$(if $(archhelp),$(archhelp),\
1664                 echo '  No architecture-speci !! 1568                 echo '  No architecture specific help defined for $(SRCARCH)')
1665         @echo  ''                                1569         @echo  ''
1666         @$(if $(boards), \                       1570         @$(if $(boards), \
1667                 $(foreach b, $(boards), \        1571                 $(foreach b, $(boards), \
1668                 printf "  %-27s - Build for % !! 1572                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1669                 echo '')                         1573                 echo '')
1670         @$(if $(board-dirs), \                   1574         @$(if $(board-dirs), \
1671                 $(foreach b, $(board-dirs), \    1575                 $(foreach b, $(board-dirs), \
1672                 printf "  %-16s - Show %s-spe    1576                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1673                 printf "  %-16s - Show all of    1577                 printf "  %-16s - Show all of the above\\n" help-boards; \
1674                 echo '')                         1578                 echo '')
1675                                                  1579 
1676         @echo  '  make V=n   [targets] 1: ver !! 1580         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1677         @echo  '                       2: giv !! 1581         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1678         @echo  '                       V=1 an << 
1679         @echo  '  make O=dir [targets] Locate    1582         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1680         @echo  '  make C=1   [targets] Check  !! 1583         @echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1681         @echo  '                       (spars << 
1682         @echo  '  make C=2   [targets] Force     1584         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1683         @echo  '  make RECORDMCOUNT_WARN=1 [t    1585         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1684         @echo  '  make W=n   [targets] Enable !! 1586         @echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
1685         @echo  '                1: warnings w    1587         @echo  '                1: warnings which may be relevant and do not occur too often'
1686         @echo  '                2: warnings w    1588         @echo  '                2: warnings which occur quite often but may still be relevant'
1687         @echo  '                3: more obscu    1589         @echo  '                3: more obscure warnings, can most likely be ignored'
1688         @echo  '                c: extra chec << 
1689         @echo  '                e: warnings a << 
1690         @echo  '                Multiple leve    1590         @echo  '                Multiple levels can be combined with W=12 or W=123'
1691         @$(if $(dtstree), \                   << 
1692                 echo '  make CHECK_DTBS=1 [ta << 
1693                 echo '         This can be ap << 
1694                 )                             << 
1695         @echo  ''                                1591         @echo  ''
1696         @echo  'Execute "make" or "make all"     1592         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1697         @echo  'For further info see the ./RE    1593         @echo  'For further info see the ./README file'
1698                                                  1594 
1699                                                  1595 
1700 help-board-dirs := $(addprefix help-,$(board-    1596 help-board-dirs := $(addprefix help-,$(board-dirs))
1701                                                  1597 
1702 help-boards: $(help-board-dirs)                  1598 help-boards: $(help-board-dirs)
1703                                                  1599 
1704 boards-per-dir = $(sort $(notdir $(wildcard $    1600 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1705                                                  1601 
1706 $(help-board-dirs): help-%:                      1602 $(help-board-dirs): help-%:
1707         @echo  'Architecture-specific targets !! 1603         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1708         @$(if $(boards-per-dir), \               1604         @$(if $(boards-per-dir), \
1709                 $(foreach b, $(boards-per-dir    1605                 $(foreach b, $(boards-per-dir), \
1710                 printf "  %-24s - Build for %    1606                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1711                 echo '')                         1607                 echo '')
1712                                                  1608 
1713                                                  1609 
1714 # Documentation targets                          1610 # Documentation targets
1715 # -------------------------------------------    1611 # ---------------------------------------------------------------------------
1716 DOC_TARGETS := xmldocs latexdocs pdfdocs html    1612 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1717                linkcheckdocs dochelp refcheck !! 1613                linkcheckdocs dochelp refcheckdocs
1718 PHONY += $(DOC_TARGETS)                          1614 PHONY += $(DOC_TARGETS)
1719 $(DOC_TARGETS):                                  1615 $(DOC_TARGETS):
1720         $(Q)$(MAKE) $(build)=Documentation $@    1616         $(Q)$(MAKE) $(build)=Documentation $@
1721                                                  1617 
1722                                               << 
1723 # Rust targets                                << 
1724 # ------------------------------------------- << 
1725                                               << 
1726 # "Is Rust available?" target                 << 
1727 PHONY += rustavailable                        << 
1728 rustavailable:                                << 
1729         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1730                                               << 
1731 # Documentation target                        << 
1732 #                                             << 
1733 # Using the singular to avoid running afoul o << 
1734 PHONY += rustdoc                              << 
1735 rustdoc: prepare                              << 
1736         $(Q)$(MAKE) $(build)=rust $@          << 
1737                                               << 
1738 # Testing target                              << 
1739 PHONY += rusttest                             << 
1740 rusttest: prepare                             << 
1741         $(Q)$(MAKE) $(build)=rust $@          << 
1742                                               << 
1743 # Formatting targets                          << 
1744 PHONY += rustfmt rustfmtcheck                 << 
1745                                               << 
1746 # We skip `rust/alloc` since we want to minim << 
1747 #                                             << 
1748 # We match using absolute paths since `find`  << 
1749 # when matching, which is a problem when e.g. << 
1750 # We `grep` afterwards in order to remove the << 
1751 rustfmt:                                      << 
1752         $(Q)find $(abs_srctree) -type f -name << 
1753                 -o -path $(abs_srctree)/rust/ << 
1754                 -o -path $(abs_objtree)/rust/ << 
1755                 | grep -Fv $(abs_srctree)/rus << 
1756                 | grep -Fv $(abs_objtree)/rus << 
1757                 | grep -Fv generated \        << 
1758                 | xargs $(RUSTFMT) $(rustfmt_ << 
1759                                               << 
1760 rustfmtcheck: rustfmt_flags = --check         << 
1761 rustfmtcheck: rustfmt                         << 
1762                                               << 
1763 # Misc                                           1618 # Misc
1764 # -------------------------------------------    1619 # ---------------------------------------------------------------------------
1765                                                  1620 
1766 PHONY += misc-check                           << 
1767 misc-check:                                   << 
1768         $(Q)$(srctree)/scripts/misc-check     << 
1769                                               << 
1770 all: misc-check                               << 
1771                                               << 
1772 PHONY += scripts_gdb                             1621 PHONY += scripts_gdb
1773 scripts_gdb: prepare0                            1622 scripts_gdb: prepare0
1774         $(Q)$(MAKE) $(build)=scripts/gdb         1623         $(Q)$(MAKE) $(build)=scripts/gdb
1775         $(Q)ln -fsn $(abspath $(srctree)/scri    1624         $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1776                                                  1625 
1777 ifdef CONFIG_GDB_SCRIPTS                         1626 ifdef CONFIG_GDB_SCRIPTS
1778 all: scripts_gdb                                 1627 all: scripts_gdb
1779 endif                                            1628 endif
1780                                                  1629 
1781 else # KBUILD_EXTMOD                             1630 else # KBUILD_EXTMOD
1782                                                  1631 
1783 filechk_kernel.release = echo $(KERNELRELEASE << 
1784                                               << 
1785 ###                                              1632 ###
1786 # External module support.                       1633 # External module support.
1787 # When building external modules the kernel u    1634 # When building external modules the kernel used as basis is considered
1788 # read-only, and no consistency checks are ma    1635 # read-only, and no consistency checks are made and the make
1789 # system is not used on the basis kernel. If     1636 # system is not used on the basis kernel. If updates are required
1790 # in the basis kernel ordinary make commands  !! 1637 # in the basis kernel ordinary make commands (without M=...) must
                                                   >> 1638 # be used.
                                                   >> 1639 #
                                                   >> 1640 # The following are the only valid targets when building external
                                                   >> 1641 # modules.
                                                   >> 1642 # make M=dir clean     Delete all automatically generated files
                                                   >> 1643 # make M=dir modules   Make all modules in specified dir
                                                   >> 1644 # make M=dir           Same as 'make M=dir modules'
                                                   >> 1645 # make M=dir modules_install
                                                   >> 1646 #                      Install the modules built in the module directory
                                                   >> 1647 #                      Assumes install directory is already created
1791                                                  1648 
1792 # We are always building only modules.        !! 1649 # We are always building modules
1793 KBUILD_BUILTIN :=                             << 
1794 KBUILD_MODULES := 1                              1650 KBUILD_MODULES := 1
1795                                                  1651 
1796 build-dir := $(KBUILD_EXTMOD)                 !! 1652 PHONY += $(objtree)/Module.symvers
                                                   >> 1653 $(objtree)/Module.symvers:
                                                   >> 1654         @test -e $(objtree)/Module.symvers || ( \
                                                   >> 1655         echo; \
                                                   >> 1656         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
                                                   >> 1657         echo "           is missing; modules will have no dependencies and modversions."; \
                                                   >> 1658         echo )
                                                   >> 1659 
                                                   >> 1660 build-dirs := $(KBUILD_EXTMOD)
                                                   >> 1661 PHONY += modules
                                                   >> 1662 modules: descend $(objtree)/Module.symvers
                                                   >> 1663         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
                                                   >> 1664 
                                                   >> 1665 PHONY += modules_install
                                                   >> 1666 modules_install: _emodinst_ _emodinst_post
1797                                                  1667 
1798 compile_commands.json: $(extmod_prefix)compil !! 1668 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1799 PHONY += compile_commands.json                !! 1669 PHONY += _emodinst_
                                                   >> 1670 _emodinst_:
                                                   >> 1671         $(Q)mkdir -p $(MODLIB)/$(install-dir)
                                                   >> 1672         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1673 
                                                   >> 1674 PHONY += _emodinst_post
                                                   >> 1675 _emodinst_post: _emodinst_
                                                   >> 1676         $(call cmd,depmod)
1800                                                  1677 
1801 clean-dirs := $(KBUILD_EXTMOD)                   1678 clean-dirs := $(KBUILD_EXTMOD)
1802 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1679 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1803         $(KBUILD_EXTMOD)/compile_commands.jso << 
1804                                                  1680 
1805 PHONY += prepare                              !! 1681 PHONY += /
1806 # now expand this into a simple variable to r !! 1682 /:
1807 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1683         @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1808 prepare:                                      << 
1809         @if [ "$(CC_VERSION_TEXT)" != "$(CONF << 
1810                 echo >&2 "warning: the compil << 
1811                 echo >&2 "  The kernel was bu << 
1812                 echo >&2 "  You are using:    << 
1813         fi                                    << 
1814                                                  1684 
1815 PHONY += help                                    1685 PHONY += help
1816 help:                                            1686 help:
1817         @echo  '  Building external modules.'    1687         @echo  '  Building external modules.'
1818         @echo  '  Syntax: make -C path/to/ker    1688         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1819         @echo  ''                                1689         @echo  ''
1820         @echo  '  modules         - default t    1690         @echo  '  modules         - default target, build the module(s)'
1821         @echo  '  modules_install - install t    1691         @echo  '  modules_install - install the module'
1822         @echo  '  clean           - remove ge    1692         @echo  '  clean           - remove generated files in module directory only'
1823         @echo  '  rust-analyzer   - generate  << 
1824         @echo  ''                                1693         @echo  ''
1825                                                  1694 
1826 ifndef CONFIG_MODULES                         !! 1695 PHONY += prepare
1827 modules modules_install: __external_modules_e << 
1828 __external_modules_error:                     << 
1829         @echo >&2 '***'                       << 
1830         @echo >&2 '*** The present kernel dis << 
1831         @echo >&2 '*** You cannot build or in << 
1832         @echo >&2 '***'                       << 
1833         @false                                << 
1834 endif                                         << 
1835                                               << 
1836 endif # KBUILD_EXTMOD                            1696 endif # KBUILD_EXTMOD
1837                                                  1697 
1838 # ------------------------------------------- << 
1839 # Modules                                     << 
1840                                               << 
1841 PHONY += modules modules_install modules_sign << 
1842                                               << 
1843 modules_install:                              << 
1844         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1845         sign-only=$(if $(filter modules_insta << 
1846                                               << 
1847 ifeq ($(CONFIG_MODULE_SIG),y)                 << 
1848 # modules_sign is a subset of modules_install << 
1849 # 'make modules_install modules_sign' is equi << 
1850 modules_sign: modules_install                 << 
1851         @:                                    << 
1852 else                                          << 
1853 modules_sign:                                 << 
1854         @echo >&2 '***'                       << 
1855         @echo >&2 '*** CONFIG_MODULE_SIG is d << 
1856         @echo >&2 '***'                       << 
1857         @false                                << 
1858 endif                                         << 
1859                                               << 
1860 ifdef CONFIG_MODULES                          << 
1861                                               << 
1862 $(MODORDER): $(build-dir)                     << 
1863         @:                                    << 
1864                                               << 
1865 # KBUILD_MODPOST_NOFINAL can be set to skip t << 
1866 # This is solely useful to speed up test comp << 
1867 modules: modpost                              << 
1868 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1869         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1870 endif                                         << 
1871                                               << 
1872 PHONY += modules_check                        << 
1873 modules_check: $(MODORDER)                    << 
1874         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1875                                               << 
1876 else # CONFIG_MODULES                         << 
1877                                               << 
1878 modules:                                      << 
1879         @:                                    << 
1880                                               << 
1881 KBUILD_MODULES :=                             << 
1882                                               << 
1883 endif # CONFIG_MODULES                        << 
1884                                               << 
1885 PHONY += modpost                              << 
1886 modpost: $(if $(single-build),, $(if $(KBUILD << 
1887          $(if $(KBUILD_MODULES), modules_chec << 
1888         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1889                                               << 
1890 # Single targets                                 1698 # Single targets
1891 # -------------------------------------------    1699 # ---------------------------------------------------------------------------
1892 # To build individual files in subdirectories    1700 # To build individual files in subdirectories, you can do like this:
1893 #                                                1701 #
1894 #   make foo/bar/baz.s                           1702 #   make foo/bar/baz.s
1895 #                                                1703 #
1896 # The supported suffixes for single-target ar    1704 # The supported suffixes for single-target are listed in 'single-targets'
1897 #                                                1705 #
1898 # To build only under specific subdirectories    1706 # To build only under specific subdirectories, you can do like this:
1899 #                                                1707 #
1900 #   make foo/bar/baz/                            1708 #   make foo/bar/baz/
1901                                                  1709 
1902 ifdef single-build                               1710 ifdef single-build
1903                                                  1711 
1904 # .ko is special because modpost is needed       1712 # .ko is special because modpost is needed
1905 single-ko := $(sort $(filter %.ko, $(MAKECMDG    1713 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1906 single-no-ko := $(filter-out $(single-ko), $( !! 1714 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1907                 $(foreach x, o mod, $(patsubs << 
1908                                                  1715 
1909 $(single-ko): single_modules                  !! 1716 $(single-ko): single_modpost
1910         @:                                       1717         @:
1911 $(single-no-ko): $(build-dir)                 !! 1718 $(single-no-ko): descend
1912         @:                                       1719         @:
1913                                                  1720 
1914 # Remove MODORDER when done because it is not !! 1721 ifeq ($(KBUILD_EXTMOD),)
1915 PHONY += single_modules                       !! 1722 # For the single build of in-tree modules, use a temporary file to avoid
1916 single_modules: $(single-no-ko) modules_prepa !! 1723 # the situation of modules_install installing an invalid modules.order.
1917         $(Q){ $(foreach m, $(single-ko), echo !! 1724 MODORDER := .modules.tmp
1918         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1919 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1920         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1921 endif                                            1725 endif
1922         $(Q)rm -f $(MODORDER)                 << 
1923                                                  1726 
1924 single-goals := $(addprefix $(build-dir)/, $( !! 1727 PHONY += single_modpost
                                                   >> 1728 single_modpost: $(single-no-ko)
                                                   >> 1729         $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
                                                   >> 1730         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1925                                                  1731 
1926 KBUILD_MODULES := 1                              1732 KBUILD_MODULES := 1
1927                                                  1733 
                                                   >> 1734 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
                                                   >> 1735 
                                                   >> 1736 # trim unrelated directories
                                                   >> 1737 build-dirs := $(foreach d, $(build-dirs), \
                                                   >> 1738                         $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
                                                   >> 1739 
1928 endif                                            1740 endif
1929                                                  1741 
                                                   >> 1742 # Handle descending into subdirectories listed in $(build-dirs)
1930 # Preset locale variables to speed up the bui    1743 # Preset locale variables to speed up the build process. Limit locale
1931 # tweaks to this spot to avoid wrong language    1744 # tweaks to this spot to avoid wrong language settings when running
1932 # make menuconfig etc.                           1745 # make menuconfig etc.
1933 # Error messages still appears in the origina    1746 # Error messages still appears in the original language
1934 PHONY += $(build-dir)                         !! 1747 PHONY += descend $(build-dirs)
1935 $(build-dir): prepare                         !! 1748 descend: $(build-dirs)
1936         $(Q)$(MAKE) $(build)=$@ need-builtin= !! 1749 $(build-dirs): prepare
                                                   >> 1750         $(Q)$(MAKE) $(build)=$@ \
                                                   >> 1751         single-build=$(if $(filter-out $@/, $(single-no-ko)),1) \
                                                   >> 1752         need-builtin=1 need-modorder=1
1937                                                  1753 
1938 clean-dirs := $(addprefix _clean_, $(clean-di    1754 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1939 PHONY += $(clean-dirs) clean                     1755 PHONY += $(clean-dirs) clean
1940 $(clean-dirs):                                   1756 $(clean-dirs):
1941         $(Q)$(MAKE) $(clean)=$(patsubst _clea    1757         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1942                                                  1758 
1943 clean: $(clean-dirs)                             1759 clean: $(clean-dirs)
                                                   >> 1760         $(call cmd,rmdirs)
1944         $(call cmd,rmfiles)                      1761         $(call cmd,rmfiles)
1945         @find $(or $(KBUILD_EXTMOD), .) $(RCS !! 1762         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1946                 \( -name '*.[aios]' -o -name  !! 1763                 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1947                 -o -name '*.ko.*' \              1764                 -o -name '*.ko.*' \
1948                 -o -name '*.dtb' -o -name '*. !! 1765                 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1949                 -o -name '*.dtb.S' -o -name ' << 
1950                 -o -name '*.dt.yaml' -o -name << 
1951                 -o -name '*.dwo' -o -name '*.    1766                 -o -name '*.dwo' -o -name '*.lst' \
1952                 -o -name '*.su' -o -name '*.m !! 1767                 -o -name '*.su' -o -name '*.mod' -o -name '*.ns_deps' \
1953                 -o -name '.*.d' -o -name '.*.    1768                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1954                 -o -name '*.lex.c' -o -name '    1769                 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1955                 -o -name '*.asn1.[ch]' \         1770                 -o -name '*.asn1.[ch]' \
1956                 -o -name '*.symtypes' -o -nam    1771                 -o -name '*.symtypes' -o -name 'modules.order' \
                                                   >> 1772                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1957                 -o -name '*.c.[012]*.*' \        1773                 -o -name '*.c.[012]*.*' \
1958                 -o -name '*.ll' \                1774                 -o -name '*.ll' \
1959                 -o -name '*.gcno' \           !! 1775                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1960                 \) -type f -print \           << 
1961                 -o -name '.tmp_*' -print \    << 
1962                 | xargs rm -rf                << 
1963                                                  1776 
1964 # Generate tags for editors                      1777 # Generate tags for editors
1965 # -------------------------------------------    1778 # ---------------------------------------------------------------------------
1966 quiet_cmd_tags = GEN     $@                      1779 quiet_cmd_tags = GEN     $@
1967       cmd_tags = $(BASH) $(srctree)/scripts/t    1780       cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1968                                                  1781 
1969 tags TAGS cscope gtags: FORCE                    1782 tags TAGS cscope gtags: FORCE
1970         $(call cmd,tags)                         1783         $(call cmd,tags)
1971                                                  1784 
1972 # Generate rust-project.json (a file that des << 
1973 # Rust projects) for rust-analyzer (an implem << 
1974 # Protocol).                                  << 
1975 PHONY += rust-analyzer                        << 
1976 rust-analyzer:                                << 
1977         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1978         $(Q)$(MAKE) $(build)=rust $@          << 
1979                                               << 
1980 # Script to generate missing namespace depend    1785 # Script to generate missing namespace dependencies
1981 # -------------------------------------------    1786 # ---------------------------------------------------------------------------
1982                                                  1787 
1983 PHONY += nsdeps                                  1788 PHONY += nsdeps
1984 nsdeps: export KBUILD_NSDEPS=1                << 
1985 nsdeps: modules                               << 
1986         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1987                                               << 
1988 # Clang Tooling                               << 
1989 # ------------------------------------------- << 
1990                                               << 
1991 quiet_cmd_gen_compile_commands = GEN     $@   << 
1992       cmd_gen_compile_commands = $(PYTHON3) $ << 
1993                                               << 
1994 $(extmod_prefix)compile_commands.json: $(srct << 
1995         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K << 
1996         $(if $(CONFIG_MODULES), $(MODORDER))  << 
1997         $(call if_changed,gen_compile_command << 
1998                                               << 
1999 targets += $(extmod_prefix)compile_commands.j << 
2000                                               << 
2001 PHONY += clang-tidy clang-analyzer            << 
2002                                               << 
2003 ifdef CONFIG_CC_IS_CLANG                      << 
2004 quiet_cmd_clang_tools = CHECK   $<            << 
2005       cmd_clang_tools = $(PYTHON3) $(srctree) << 
2006                                                  1789 
2007 clang-tidy clang-analyzer: $(extmod_prefix)co !! 1790 nsdeps: modules
2008         $(call cmd,clang_tools)               !! 1791         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps
2009 else                                          !! 1792         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
2010 clang-tidy clang-analyzer:                    << 
2011         @echo "$@ requires CC=clang" >&2      << 
2012         @false                                << 
2013 endif                                         << 
2014                                                  1793 
2015 # Scripts to check various things for consist    1794 # Scripts to check various things for consistency
2016 # -------------------------------------------    1795 # ---------------------------------------------------------------------------
2017                                                  1796 
2018 PHONY += includecheck versioncheck coccicheck !! 1797 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
2019                                                  1798 
2020 includecheck:                                    1799 includecheck:
2021         find $(srctree)/* $(RCS_FIND_IGNORE)     1800         find $(srctree)/* $(RCS_FIND_IGNORE) \
2022                 -name '*.[hcS]' -type f -prin    1801                 -name '*.[hcS]' -type f -print | sort \
2023                 | xargs $(PERL) -w $(srctree)    1802                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2024                                                  1803 
2025 versioncheck:                                    1804 versioncheck:
2026         find $(srctree)/* $(RCS_FIND_IGNORE)     1805         find $(srctree)/* $(RCS_FIND_IGNORE) \
2027                 -name '*.[hcS]' -type f -prin    1806                 -name '*.[hcS]' -type f -print | sort \
2028                 | xargs $(PERL) -w $(srctree)    1807                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2029                                                  1808 
2030 coccicheck:                                      1809 coccicheck:
2031         $(Q)$(BASH) $(srctree)/scripts/$@        1810         $(Q)$(BASH) $(srctree)/scripts/$@
2032                                                  1811 
                                                   >> 1812 namespacecheck:
                                                   >> 1813         $(PERL) $(srctree)/scripts/namespace.pl
                                                   >> 1814 
2033 export_report:                                   1815 export_report:
2034         $(PERL) $(srctree)/scripts/export_rep    1816         $(PERL) $(srctree)/scripts/export_report.pl
2035                                                  1817 
2036 PHONY += checkstack kernelrelease kernelversi    1818 PHONY += checkstack kernelrelease kernelversion image_name
2037                                                  1819 
2038 # UML needs a little special treatment here.     1820 # UML needs a little special treatment here.  It wants to use the host
2039 # toolchain, so needs $(SUBARCH) passed to ch    1821 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2040 # else wants $(ARCH), including people doing     1822 # else wants $(ARCH), including people doing cross-builds, which means
2041 # that $(SUBARCH) doesn't work here.             1823 # that $(SUBARCH) doesn't work here.
2042 ifeq ($(ARCH), um)                               1824 ifeq ($(ARCH), um)
2043 CHECKSTACK_ARCH := $(SUBARCH)                    1825 CHECKSTACK_ARCH := $(SUBARCH)
2044 else                                             1826 else
2045 CHECKSTACK_ARCH := $(ARCH)                       1827 CHECKSTACK_ARCH := $(ARCH)
2046 endif                                            1828 endif
2047 MINSTACKSIZE    ?= 100                        << 
2048 checkstack:                                      1829 checkstack:
2049         $(OBJDUMP) -d vmlinux $$(find . -name    1830         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2050         $(PERL) $(srctree)/scripts/checkstack !! 1831         $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2051                                                  1832 
2052 kernelrelease:                                   1833 kernelrelease:
2053         @$(filechk_kernel.release)            !! 1834         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
2054                                                  1835 
2055 kernelversion:                                   1836 kernelversion:
2056         @echo $(KERNELVERSION)                   1837         @echo $(KERNELVERSION)
2057                                                  1838 
2058 image_name:                                      1839 image_name:
2059         @echo $(KBUILD_IMAGE)                    1840         @echo $(KBUILD_IMAGE)
2060                                                  1841 
2061 PHONY += run-command                          !! 1842 # Clear a bunch of variables before executing the submake
2062 run-command:                                  !! 1843 
2063         $(Q)$(KBUILD_RUN_COMMAND)             !! 1844 ifeq ($(quiet),silent_)
                                                   >> 1845 tools_silent=s
                                                   >> 1846 endif
                                                   >> 1847 
                                                   >> 1848 tools/: FORCE
                                                   >> 1849         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1850         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
                                                   >> 1851 
                                                   >> 1852 tools/%: FORCE
                                                   >> 1853         $(Q)mkdir -p $(objtree)/tools
                                                   >> 1854         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
                                                   >> 1855 
                                                   >> 1856 # FIXME Should go into a make.lib or something
                                                   >> 1857 # ===========================================================================
                                                   >> 1858 
                                                   >> 1859 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
                                                   >> 1860       cmd_rmdirs = rm -rf $(rm-dirs)
2064                                                  1861 
2065 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    1862 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
2066       cmd_rmfiles = rm -rf $(rm-files)        !! 1863       cmd_rmfiles = rm -f $(rm-files)
                                                   >> 1864 
                                                   >> 1865 # Run depmod only if we have System.map and depmod is executable
                                                   >> 1866 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
                                                   >> 1867       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
                                                   >> 1868                    $(KERNELRELEASE)
2067                                                  1869 
2068 # read saved command lines for existing targe    1870 # read saved command lines for existing targets
2069 existing-targets := $(wildcard $(sort $(targe    1871 existing-targets := $(wildcard $(sort $(targets)))
2070                                                  1872 
2071 -include $(foreach f,$(existing-targets),$(di    1873 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
2072                                                  1874 
2073 endif # config-build                          !! 1875 endif # config-targets
2074 endif # mixed-build                              1876 endif # mixed-build
2075 endif # need-sub-make                            1877 endif # need-sub-make
2076                                                  1878 
2077 PHONY += FORCE                                   1879 PHONY += FORCE
2078 FORCE:                                           1880 FORCE:
2079                                                  1881 
2080 # Declare the contents of the PHONY variable     1882 # Declare the contents of the PHONY variable as phony.  We keep that
2081 # information in a variable so we can use it     1883 # information in a variable so we can use it in if_changed and friends.
2082 .PHONY: $(PHONY)                                 1884 .PHONY: $(PHONY)
                                                      

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