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TOMOYO Linux Cross Reference
Linux/Makefile

Version: ~ [ linux-6.11.5 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.58 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.114 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.169 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.228 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.284 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.322 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /Makefile (Version linux-6.11.5) and /Makefile (Version linux-2.6.32.71)


  1 # SPDX-License-Identifier: GPL-2.0             !!   1 VERSION = 2
  2 VERSION = 6                                    !!   2 PATCHLEVEL = 6
  3 PATCHLEVEL = 11                                !!   3 SUBLEVEL = 32
  4 SUBLEVEL = 5                                   !!   4 EXTRAVERSION = .71
  5 EXTRAVERSION =                                 !!   5 NAME = Man-Eating Seals of Antiquity
  6 NAME = Baby Opossum Posse                      << 
  7                                                     6 
  8 # *DOCUMENTATION*                                   7 # *DOCUMENTATION*
  9 # To see a list of typical targets execute "ma      8 # To see a list of typical targets execute "make help"
 10 # More info can be located in ./README              9 # More info can be located in ./README
 11 # Comments in this file are targeted only to t     10 # Comments in this file are targeted only to the developer, do not
 12 # expect to learn how to build the kernel read     11 # expect to learn how to build the kernel reading this file.
 13                                                    12 
 14 ifeq ($(filter output-sync,$(.FEATURES)),)     !!  13 # Do not:
 15 $(error GNU Make >= 4.0 is required. Your Make !!  14 # o  use make's built-in rules and variables
 16 endif                                          !!  15 #    (this increases performance and avoids hard-to-debug behaviour);
 17                                                !!  16 # o  print "Entering directory ...";
 18 $(if $(filter __%, $(MAKECMDGOALS)), \         !!  17 MAKEFLAGS += -rR --no-print-directory
 19         $(error targets prefixed with '__' are << 
 20                                                << 
 21 # That's our default target when none is given << 
 22 PHONY := __all                                 << 
 23 __all:                                         << 
 24                                                    18 
 25 # We are using a recursive build, so we need t     19 # We are using a recursive build, so we need to do a little thinking
 26 # to get the ordering right.                       20 # to get the ordering right.
 27 #                                                  21 #
 28 # Most importantly: sub-Makefiles should only      22 # Most importantly: sub-Makefiles should only ever modify files in
 29 # their own directory. If in some directory we     23 # their own directory. If in some directory we have a dependency on
 30 # a file in another dir (which doesn't happen      24 # a file in another dir (which doesn't happen often, but it's often
 31 # unavoidable when linking the built-in.a targ !!  25 # unavoidable when linking the built-in.o targets which finally
 32 # turn into vmlinux), we will call a sub make      26 # turn into vmlinux), we will call a sub make in that other dir, and
 33 # after that we are sure that everything which     27 # after that we are sure that everything which is in that other dir
 34 # is now up to date.                               28 # is now up to date.
 35 #                                                  29 #
 36 # The only cases where we need to modify files     30 # The only cases where we need to modify files which have global
 37 # effects are thus separated out and done befo     31 # effects are thus separated out and done before the recursive
 38 # descending is started. They are now explicit     32 # descending is started. They are now explicitly listed as the
 39 # prepare rule.                                    33 # prepare rule.
 40                                                    34 
 41 this-makefile := $(lastword $(MAKEFILE_LIST))  << 
 42 abs_srctree := $(realpath $(dir $(this-makefil << 
 43 abs_objtree := $(CURDIR)                       << 
 44                                                << 
 45 ifneq ($(sub_make_done),1)                     << 
 46                                                << 
 47 # Do not use make's built-in rules and variabl << 
 48 # (this increases performance and avoids hard- << 
 49 MAKEFLAGS += -rR                               << 
 50                                                << 
 51 # Avoid funny character set dependencies       << 
 52 unexport LC_ALL                                << 
 53 LC_COLLATE=C                                   << 
 54 LC_NUMERIC=C                                   << 
 55 export LC_COLLATE LC_NUMERIC                   << 
 56                                                << 
 57 # Avoid interference with shell env settings   << 
 58 unexport GREP_OPTIONS                          << 
 59                                                << 
 60 # Beautify output                              << 
 61 # -------------------------------------------- << 
 62 #                                              << 
 63 # Most of build commands in Kbuild start with  << 
 64 # "quiet_cmd_*". If defined, the short log is  << 
 65 # that command is printed by default.          << 
 66 #                                              << 
 67 # e.g.)                                        << 
 68 #    quiet_cmd_depmod = DEPMOD  $(MODLIB)      << 
 69 #          cmd_depmod = $(srctree)/scripts/dep << 
 70 #                                              << 
 71 # A simple variant is to prefix commands with  << 
 72 # for commands that shall be hidden in non-ver << 
 73 #                                              << 
 74 #    $(Q)$(MAKE) $(build)=scripts/basic        << 
 75 #                                              << 
 76 # If KBUILD_VERBOSE contains 1, the whole comm << 
 77 # If KBUILD_VERBOSE contains 2, the reason for << 
 78 #                                              << 
 79 # To put more focus on warnings, be less verbo     35 # To put more focus on warnings, be less verbose as default
 80 # Use 'make V=1' to see the full commands          36 # Use 'make V=1' to see the full commands
 81                                                    37 
 82 ifeq ("$(origin V)", "command line")               38 ifeq ("$(origin V)", "command line")
 83   KBUILD_VERBOSE = $(V)                            39   KBUILD_VERBOSE = $(V)
 84 endif                                              40 endif
 85                                                !!  41 ifndef KBUILD_VERBOSE
 86 quiet = quiet_                                 !!  42   KBUILD_VERBOSE = 0
 87 Q = @                                          << 
 88                                                << 
 89 ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)    << 
 90   quiet =                                      << 
 91   Q =                                          << 
 92 endif                                          << 
 93                                                << 
 94 # If the user is running make -s (silent mode) << 
 95 # commands                                     << 
 96 ifneq ($(findstring s,$(firstword -$(MAKEFLAGS << 
 97 quiet=silent_                                  << 
 98 override KBUILD_VERBOSE :=                     << 
 99 endif                                              43 endif
100                                                    44 
101 export quiet Q KBUILD_VERBOSE                  << 
102                                                << 
103 # Call a source code checker (by default, "spa     45 # Call a source code checker (by default, "sparse") as part of the
104 # C compilation.                                   46 # C compilation.
105 #                                                  47 #
106 # Use 'make C=1' to enable checking of only re     48 # Use 'make C=1' to enable checking of only re-compiled files.
107 # Use 'make C=2' to enable checking of *all* s     49 # Use 'make C=2' to enable checking of *all* source files, regardless
108 # of whether they are re-compiled or not.          50 # of whether they are re-compiled or not.
109 #                                                  51 #
110 # See the file "Documentation/dev-tools/sparse !!  52 # See the file "Documentation/sparse.txt" for more details, including
111 # including where to get the "sparse" utility. !!  53 # where to get the "sparse" utility.
112                                                    54 
113 ifeq ("$(origin C)", "command line")               55 ifeq ("$(origin C)", "command line")
114   KBUILD_CHECKSRC = $(C)                           56   KBUILD_CHECKSRC = $(C)
115 endif                                              57 endif
116 ifndef KBUILD_CHECKSRC                             58 ifndef KBUILD_CHECKSRC
117   KBUILD_CHECKSRC = 0                              59   KBUILD_CHECKSRC = 0
118 endif                                              60 endif
119                                                    61 
120 export KBUILD_CHECKSRC                         !!  62 # Use make M=dir to specify directory of external module to build
121                                                !!  63 # Old syntax make ... SUBDIRS=$PWD is still supported
122 # Enable "clippy" (a linter) as part of the Ru !!  64 # Setting the environment variable KBUILD_EXTMOD take precedence
123 #                                              !!  65 ifdef SUBDIRS
124 # Use 'make CLIPPY=1' to enable it.            !!  66   KBUILD_EXTMOD ?= $(SUBDIRS)
125 ifeq ("$(origin CLIPPY)", "command line")      << 
126   KBUILD_CLIPPY := $(CLIPPY)                   << 
127 endif                                              67 endif
128                                                    68 
129 export KBUILD_CLIPPY                           << 
130                                                << 
131 # Use make M=dir or set the environment variab << 
132 # directory of external module to build. Setti << 
133 ifeq ("$(origin M)", "command line")               69 ifeq ("$(origin M)", "command line")
134   KBUILD_EXTMOD := $(M)                            70   KBUILD_EXTMOD := $(M)
135 endif                                              71 endif
136                                                    72 
137 $(if $(word 2, $(KBUILD_EXTMOD)), \            !!  73 # kbuild supports saving output files in a separate directory.
138         $(error building multiple external mod !!  74 # To locate output files in a separate directory two syntaxes are supported.
139                                                !!  75 # In both cases the working directory must be the root of the kernel src.
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI << 
141         $(error module directory path cannot c << 
142                                                << 
143 # Remove trailing slashes                      << 
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)        << 
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM << 
146 endif                                          << 
147                                                << 
148 export KBUILD_EXTMOD                           << 
149                                                << 
150 # backward compatibility                       << 
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC << 
152                                                << 
153 ifeq ("$(origin W)", "command line")           << 
154   KBUILD_EXTRA_WARN := $(W)                    << 
155 endif                                          << 
156                                                << 
157 export KBUILD_EXTRA_WARN                       << 
158                                                << 
159 # Kbuild will save output files in the current << 
160 # This does not need to match to the root of t << 
161 #                                              << 
162 # For example, you can do this:                << 
163 #                                              << 
164 #  cd /dir/to/store/output/files; make -f /dir << 
165 #                                              << 
166 # If you want to save output files in a differ << 
167 # two syntaxes to specify it.                  << 
168 #                                              << 
169 # 1) O=                                            76 # 1) O=
170 # Use "make O=dir/to/store/output/files/"          77 # Use "make O=dir/to/store/output/files/"
171 #                                                  78 #
172 # 2) Set KBUILD_OUTPUT                             79 # 2) Set KBUILD_OUTPUT
173 # Set the environment variable KBUILD_OUTPUT t !!  80 # Set the environment variable KBUILD_OUTPUT to point to the directory
174 # export KBUILD_OUTPUT=dir/to/store/output/fil !!  81 # where the output files shall be placed.
                                                   >>  82 # export KBUILD_OUTPUT=dir/to/store/output/files/
                                                   >>  83 # make
175 #                                                  84 #
176 # The O= assignment takes precedence over the      85 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
177 # variable.                                        86 # variable.
178                                                    87 
179 # Do we want to change the working directory?  << 
180 ifeq ("$(origin O)", "command line")           << 
181   KBUILD_OUTPUT := $(O)                        << 
182 endif                                          << 
183                                                    88 
184 ifneq ($(KBUILD_OUTPUT),)                      !!  89 # KBUILD_SRC is set on invocation of make in OBJ directory
185 # $(realpath ...) gets empty if the path does  !!  90 # KBUILD_SRC is not intended to be used by the regular user (for now)
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")           !!  91 ifeq ($(KBUILD_SRC),)
187 # $(realpath ...) resolves symlinks            << 
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))    << 
189 $(if $(abs_objtree),,$(error failed to create  << 
190 endif # ifneq ($(KBUILD_OUTPUT),)              << 
191                                                << 
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1 << 
193 $(error source directory cannot contain spaces << 
194 endif                                          << 
195                                                << 
196 export sub_make_done := 1                      << 
197                                                << 
198 endif # sub_make_done                          << 
199                                                << 
200 ifeq ($(abs_objtree),$(CURDIR))                << 
201 # Suppress "Entering directory ..." if we are  << 
202 no-print-directory := --no-print-directory     << 
203 else                                           << 
204 # Recursion to show "Entering directory ..."   << 
205 need-sub-make := 1                             << 
206 endif                                          << 
207                                                    92 
208 ifeq ($(filter --no-print-directory, $(MAKEFLA !!  93 # OK, Make called in directory where kernel src resides
209 # If --no-print-directory is unset, recurse on !!  94 # Do we want to locate output files in a separate directory?
210 # You may end up recursing into __sub-make twi !!  95 ifeq ("$(origin O)", "command line")
211 # behavior change in GNU Make 4.4.1.           !!  96   KBUILD_OUTPUT := $(O)
212 need-sub-make := 1                             << 
213 endif                                              97 endif
214                                                    98 
215 ifeq ($(need-sub-make),1)                      !!  99 # That's our default target when none is given on the command line
216                                                !! 100 PHONY := _all
217 PHONY += $(MAKECMDGOALS) __sub-make            !! 101 _all:
218                                                   102 
219 $(filter-out $(this-makefile), $(MAKECMDGOALS) !! 103 # Cancel implicit rules on top Makefile
220         @:                                     !! 104 $(CURDIR)/Makefile Makefile: ;
221                                                   105 
                                                   >> 106 ifneq ($(KBUILD_OUTPUT),)
222 # Invoke a second make in the output directory    107 # Invoke a second make in the output directory, passing relevant variables
223 __sub-make:                                    !! 108 # check that the output directory actually exists
224         $(Q)$(MAKE) $(no-print-directory) -C $ !! 109 saved-output := $(KBUILD_OUTPUT)
225         -f $(abs_srctree)/Makefile $(MAKECMDGO !! 110 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
                                                   >> 111 $(if $(KBUILD_OUTPUT),, \
                                                   >> 112      $(error output directory "$(saved-output)" does not exist))
                                                   >> 113 
                                                   >> 114 PHONY += $(MAKECMDGOALS) sub-make
                                                   >> 115 
                                                   >> 116 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
                                                   >> 117         $(Q)@:
                                                   >> 118 
                                                   >> 119 sub-make: FORCE
                                                   >> 120         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
                                                   >> 121         KBUILD_SRC=$(CURDIR) \
                                                   >> 122         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
                                                   >> 123         $(filter-out _all sub-make,$(MAKECMDGOALS))
226                                                   124 
227 else # need-sub-make                           !! 125 # Leave processing to above invocation of make
                                                   >> 126 skip-makefile := 1
                                                   >> 127 endif # ifneq ($(KBUILD_OUTPUT),)
                                                   >> 128 endif # ifeq ($(KBUILD_SRC),)
228                                                   129 
229 # We process the rest of the Makefile if this     130 # We process the rest of the Makefile if this is the final invocation of make
                                                   >> 131 ifeq ($(skip-makefile),)
230                                                   132 
231 ifeq ($(abs_srctree),$(abs_objtree))           !! 133 # If building an external module we do not care about the all: rule
232         # building in the source tree          !! 134 # but instead _all depend on modules
233         srctree := .                           !! 135 PHONY += all
234         building_out_of_srctree :=             << 
235 else                                           << 
236         ifeq ($(abs_srctree)/,$(dir $(abs_objt << 
237                 # building in a subdirectory o << 
238                 srctree := ..                  << 
239         else                                   << 
240                 srctree := $(abs_srctree)      << 
241         endif                                  << 
242         building_out_of_srctree := 1           << 
243 endif                                          << 
244                                                << 
245 ifneq ($(KBUILD_ABS_SRCTREE),)                 << 
246 srctree := $(abs_srctree)                      << 
247 endif                                          << 
248                                                << 
249 objtree         := .                           << 
250                                                << 
251 VPATH           :=                             << 
252                                                << 
253 ifeq ($(KBUILD_EXTMOD),)                       << 
254 ifdef building_out_of_srctree                  << 
255 VPATH           := $(srctree)                  << 
256 endif                                          << 
257 endif                                          << 
258                                                << 
259 export building_out_of_srctree srctree objtree << 
260                                                << 
261 # To make sure we do not include .config for a << 
262 # catch them early, and hand them over to scri << 
263 # It is allowed to specify more targets when c << 
264 # mixing *config targets and build targets.    << 
265 # For example 'make oldconfig all'.            << 
266 # Detect when mixed targets is specified, and  << 
267 # of make so .config is not included in this c << 
268                                                << 
269 version_h := include/generated/uapi/linux/vers << 
270                                                << 
271 clean-targets := %clean mrproper cleandocs     << 
272 no-dot-config-targets := $(clean-targets) \    << 
273                          cscope gtags TAGS tag << 
274                          $(version_h) headers  << 
275                          %asm-generic kernelve << 
276                          outputmakefile rustav << 
277 no-sync-config-targets := $(no-dot-config-targ << 
278                           image_name           << 
279 single-targets := %.a %.i %.ko %.lds %.ll %.ls << 
280                                                << 
281 config-build    :=                             << 
282 mixed-build     :=                             << 
283 need-config     := 1                           << 
284 may-sync-config := 1                           << 
285 single-build    :=                             << 
286                                                << 
287 ifneq ($(filter $(no-dot-config-targets), $(MA << 
288     ifeq ($(filter-out $(no-dot-config-targets << 
289         need-config :=                         << 
290     endif                                      << 
291 endif                                          << 
292                                                << 
293 ifneq ($(filter $(no-sync-config-targets), $(M << 
294     ifeq ($(filter-out $(no-sync-config-target << 
295         may-sync-config :=                     << 
296     endif                                      << 
297 endif                                          << 
298                                                << 
299 need-compiler := $(may-sync-config)            << 
300                                                << 
301 ifneq ($(KBUILD_EXTMOD),)                      << 
302     may-sync-config :=                         << 
303 endif                                          << 
304                                                << 
305 ifeq ($(KBUILD_EXTMOD),)                          136 ifeq ($(KBUILD_EXTMOD),)
306     ifneq ($(filter %config,$(MAKECMDGOALS)),) !! 137 _all: all
307         config-build := 1                      !! 138 else
308         ifneq ($(words $(MAKECMDGOALS)),1)     !! 139 _all: modules
309             mixed-build := 1                   << 
310         endif                                  << 
311     endif                                      << 
312 endif                                          << 
313                                                << 
314 # We cannot build single targets and the other << 
315 ifneq ($(filter $(single-targets), $(MAKECMDGO << 
316     single-build := 1                          << 
317     ifneq ($(filter-out $(single-targets), $(M << 
318         mixed-build := 1                       << 
319     endif                                      << 
320 endif                                          << 
321                                                << 
322 # For "make -j clean all", "make -j mrproper d << 
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL << 
324     ifneq ($(filter-out $(clean-targets),$(MAK << 
325         mixed-build := 1                       << 
326     endif                                      << 
327 endif                                          << 
328                                                << 
329 # install and modules_install need also be pro << 
330 ifneq ($(filter install,$(MAKECMDGOALS)),)     << 
331     ifneq ($(filter modules_install,$(MAKECMDG << 
332         mixed-build := 1                       << 
333     endif                                      << 
334 endif                                             140 endif
335                                                   141 
336 ifdef mixed-build                              !! 142 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
337 # ============================================ !! 143 objtree         := $(CURDIR)
338 # We're called with mixed targets (*config and !! 144 src             := $(srctree)
339 # Handle them one by one.                      !! 145 obj             := $(objtree)
340                                                << 
341 PHONY += $(MAKECMDGOALS) __build_one_by_one    << 
342                                                << 
343 $(MAKECMDGOALS): __build_one_by_one            << 
344         @:                                     << 
345                                                   146 
346 __build_one_by_one:                            !! 147 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
347         $(Q)set -e; \                          << 
348         for i in $(MAKECMDGOALS); do \         << 
349                 $(MAKE) -f $(srctree)/Makefile << 
350         done                                   << 
351                                                   148 
352 else # !mixed-build                            !! 149 export srctree objtree VPATH
353                                                   150 
354 include $(srctree)/scripts/Kbuild.include      << 
355                                                   151 
356 # Read KERNELRELEASE from include/config/kerne !! 152 # SUBARCH tells the usermode build what the underlying arch is.  That is set
357 KERNELRELEASE = $(call read-file, include/conf !! 153 # first, and if a usermode build is happening, the "ARCH=um" on the command
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),. !! 154 # line overrides the setting of ARCH below.  If a native build is happening,
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA !! 155 # then ARCH is assigned, getting whatever value it gets normally, and 
                                                   >> 156 # SUBARCH is subsequently ignored.
360                                                   157 
361 include $(srctree)/scripts/subarch.include     !! 158 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
                                                   >> 159                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
                                                   >> 160                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
                                                   >> 161                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
                                                   >> 162                                   -e s/sh[234].*/sh/ )
362                                                   163 
363 # Cross compiling and selecting different set     164 # Cross compiling and selecting different set of gcc/bin-utils
364 # --------------------------------------------    165 # ---------------------------------------------------------------------------
365 #                                                 166 #
366 # When performing cross compilation for other     167 # When performing cross compilation for other architectures ARCH shall be set
367 # to the target architecture. (See arch/* for     168 # to the target architecture. (See arch/* for the possibilities).
368 # ARCH can be set during invocation of make:      169 # ARCH can be set during invocation of make:
369 # make ARCH=arm64                              !! 170 # make ARCH=ia64
370 # Another way is to have ARCH set in the envir    171 # Another way is to have ARCH set in the environment.
371 # The default ARCH is the host where make is e    172 # The default ARCH is the host where make is executed.
372                                                   173 
373 # CROSS_COMPILE specify the prefix used for al    174 # CROSS_COMPILE specify the prefix used for all executables used
374 # during compilation. Only gcc and related bin    175 # during compilation. Only gcc and related bin-utils executables
375 # are prefixed with $(CROSS_COMPILE).             176 # are prefixed with $(CROSS_COMPILE).
376 # CROSS_COMPILE can be set on the command line    177 # CROSS_COMPILE can be set on the command line
377 # make CROSS_COMPILE=aarch64-linux-gnu-        !! 178 # make CROSS_COMPILE=ia64-linux-
378 # Alternatively CROSS_COMPILE can be set in th    179 # Alternatively CROSS_COMPILE can be set in the environment.
379 # Default value for CROSS_COMPILE is not to pr    180 # Default value for CROSS_COMPILE is not to prefix executables
380 # Note: Some architectures assign CROSS_COMPIL    181 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
                                                   >> 182 export KBUILD_BUILDHOST := $(SUBARCH)
381 ARCH            ?= $(SUBARCH)                     183 ARCH            ?= $(SUBARCH)
                                                   >> 184 CROSS_COMPILE   ?=
382                                                   185 
383 # Architecture as present in compile.h            186 # Architecture as present in compile.h
384 UTS_MACHINE     := $(ARCH)                        187 UTS_MACHINE     := $(ARCH)
385 SRCARCH         := $(ARCH)                        188 SRCARCH         := $(ARCH)
386                                                   189 
387 # Additional ARCH settings for x86                190 # Additional ARCH settings for x86
388 ifeq ($(ARCH),i386)                               191 ifeq ($(ARCH),i386)
389         SRCARCH := x86                            192         SRCARCH := x86
390 endif                                             193 endif
391 ifeq ($(ARCH),x86_64)                             194 ifeq ($(ARCH),x86_64)
392         SRCARCH := x86                            195         SRCARCH := x86
393 endif                                             196 endif
394                                                   197 
395 # Additional ARCH settings for sparc              198 # Additional ARCH settings for sparc
396 ifeq ($(ARCH),sparc32)                         << 
397        SRCARCH := sparc                        << 
398 endif                                          << 
399 ifeq ($(ARCH),sparc64)                            199 ifeq ($(ARCH),sparc64)
400        SRCARCH := sparc                           200        SRCARCH := sparc
401 endif                                             201 endif
402                                                   202 
403 # Additional ARCH settings for parisc          !! 203 # Additional ARCH settings for sh
404 ifeq ($(ARCH),parisc64)                        !! 204 ifeq ($(ARCH),sh64)
405        SRCARCH := parisc                       !! 205        SRCARCH := sh
406 endif                                             206 endif
407                                                   207 
408 export cross_compiling :=                      !! 208 # Where to locate arch specific headers
409 ifneq ($(SRCARCH),$(SUBARCH))                  !! 209 hdr-arch  := $(SRCARCH)
410 cross_compiling := 1                           !! 210 
                                                   >> 211 ifeq ($(ARCH),m68knommu)
                                                   >> 212        hdr-arch  := m68k
411 endif                                             213 endif
412                                                   214 
413 KCONFIG_CONFIG  ?= .config                        215 KCONFIG_CONFIG  ?= .config
414 export KCONFIG_CONFIG                          << 
415                                                   216 
416 # SHELL used by kbuild                            217 # SHELL used by kbuild
417 CONFIG_SHELL := sh                             !! 218 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
                                                   >> 219           else if [ -x /bin/bash ]; then echo /bin/bash; \
                                                   >> 220           else echo sh; fi ; fi)
                                                   >> 221 
                                                   >> 222 HOSTCC       = gcc
                                                   >> 223 HOSTCXX      = g++
                                                   >> 224 HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
                                                   >> 225 HOSTCXXFLAGS = -O2
                                                   >> 226 
                                                   >> 227 # Decide whether to build built-in, modular, or both.
                                                   >> 228 # Normally, just do built-in.
                                                   >> 229 
                                                   >> 230 KBUILD_MODULES :=
                                                   >> 231 KBUILD_BUILTIN := 1
                                                   >> 232 
                                                   >> 233 #       If we have only "make modules", don't compile built-in objects.
                                                   >> 234 #       When we're building modules with modversions, we need to consider
                                                   >> 235 #       the built-in objects during the descend as well, in order to
                                                   >> 236 #       make sure the checksums are up to date before we record them.
                                                   >> 237 
                                                   >> 238 ifeq ($(MAKECMDGOALS),modules)
                                                   >> 239   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
                                                   >> 240 endif
418                                                   241 
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS  !! 242 #       If we have "make <whatever> modules", compile modules
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG !! 243 #       in addition to whatever we do anyway.
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d !! 244 #       Just "make" or "make all" shall build modules as well
422                                                   245 
423 ifneq ($(LLVM),)                               !! 246 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
424 ifneq ($(filter %/,$(LLVM)),)                  !! 247   KBUILD_MODULES := 1
425 LLVM_PREFIX := $(LLVM)                         << 
426 else ifneq ($(filter -%,$(LLVM)),)             << 
427 LLVM_SUFFIX := $(LLVM)                         << 
428 endif                                             248 endif
429                                                   249 
430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)    !! 250 ifeq ($(MAKECMDGOALS),)
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)  !! 251   KBUILD_MODULES := 1
                                                   >> 252 endif
                                                   >> 253 
                                                   >> 254 export KBUILD_MODULES KBUILD_BUILTIN
                                                   >> 255 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
                                                   >> 256 
                                                   >> 257 # Beautify output
                                                   >> 258 # ---------------------------------------------------------------------------
                                                   >> 259 #
                                                   >> 260 # Normally, we echo the whole command before executing it. By making
                                                   >> 261 # that echo $($(quiet)$(cmd)), we now have the possibility to set
                                                   >> 262 # $(quiet) to choose other forms of output instead, e.g.
                                                   >> 263 #
                                                   >> 264 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
                                                   >> 265 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
                                                   >> 266 #
                                                   >> 267 # If $(quiet) is empty, the whole command will be printed.
                                                   >> 268 # If it is set to "quiet_", only the short version will be printed. 
                                                   >> 269 # If it is set to "silent_", nothing will be printed at all, since
                                                   >> 270 # the variable $(silent_cmd_cc_o_c) doesn't exist.
                                                   >> 271 #
                                                   >> 272 # A simple variant is to prefix commands with $(Q) - that's useful
                                                   >> 273 # for commands that shall be hidden in non-verbose mode.
                                                   >> 274 #
                                                   >> 275 #       $(Q)ln $@ :<
                                                   >> 276 #
                                                   >> 277 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
                                                   >> 278 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
                                                   >> 279 
                                                   >> 280 ifeq ($(KBUILD_VERBOSE),1)
                                                   >> 281   quiet =
                                                   >> 282   Q =
432 else                                              283 else
433 HOSTCC  = gcc                                  !! 284   quiet=quiet_
434 HOSTCXX = g++                                  !! 285   Q = @
435 endif                                             286 endif
436 HOSTRUSTC = rustc                              << 
437 HOSTPKG_CONFIG  = pkg-config                   << 
438                                                   287 
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto !! 288 # If the user is running make -s (silent mode), suppress echoing of
440                          -O2 -fomit-frame-poin !! 289 # commands
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) !! 290 
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)           !! 291 ifneq ($(findstring s,$(MAKEFLAGS)),)
443                                                !! 292   quiet=silent_
444 # These flags apply to all Rust code in the tr !! 293 endif
445 # host programs.                               !! 294 
446 export rust_common_flags := --edition=2021 \   !! 295 export quiet Q KBUILD_VERBOSE
447                             -Zbinary_dep_depin !! 296 
448                             -Astable_features  !! 297 
449                             -Dunsafe_op_in_uns !! 298 # Look for make include files relative to root of kernel src
450                             -Dnon_ascii_idents !! 299 MAKEFLAGS += --include-dir=$(srctree)
451                             -Wrust_2018_idioms !! 300 
452                             -Wunreachable_pub  !! 301 # We need some generic definitions (do not try to remake the file).
453                             -Wmissing_docs \   !! 302 $(srctree)/scripts/Kbuild.include: ;
454                             -Wrustdoc::missing !! 303 include $(srctree)/scripts/Kbuild.include
455                             -Wclippy::all \    << 
456                             -Wclippy::mut_mut  << 
457                             -Wclippy::needless << 
458                             -Wclippy::needless << 
459                             -Wclippy::no_mangl << 
460                             -Wclippy::dbg_macr << 
461                                                << 
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS << 
463                        $(HOSTCFLAGS) -I $(srct << 
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF << 
465                        -I $(srctree)/scripts/i << 
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) - << 
467                         -Zallow-features= $(HO << 
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H << 
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST << 
470                                                   304 
471 # Make variables (CC, etc...)                     305 # Make variables (CC, etc...)
472 CPP             = $(CC) -E                     !! 306 
473 ifneq ($(LLVM),)                               !! 307 AS              = $(CROSS_COMPILE)as
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU << 
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S << 
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_ << 
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_ << 
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$( << 
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$( << 
480 READELF         = $(LLVM_PREFIX)llvm-readelf$( << 
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL << 
482 else                                           << 
483 CC              = $(CROSS_COMPILE)gcc          << 
484 LD              = $(CROSS_COMPILE)ld              308 LD              = $(CROSS_COMPILE)ld
                                                   >> 309 CC              = $(CROSS_COMPILE)gcc
                                                   >> 310 CPP             = $(CC) -E
485 AR              = $(CROSS_COMPILE)ar              311 AR              = $(CROSS_COMPILE)ar
486 NM              = $(CROSS_COMPILE)nm              312 NM              = $(CROSS_COMPILE)nm
                                                   >> 313 STRIP           = $(CROSS_COMPILE)strip
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         314 OBJCOPY         = $(CROSS_COMPILE)objcopy
488 OBJDUMP         = $(CROSS_COMPILE)objdump         315 OBJDUMP         = $(CROSS_COMPILE)objdump
489 READELF         = $(CROSS_COMPILE)readelf      << 
490 STRIP           = $(CROSS_COMPILE)strip        << 
491 endif                                          << 
492 RUSTC           = rustc                        << 
493 RUSTDOC         = rustdoc                      << 
494 RUSTFMT         = rustfmt                      << 
495 CLIPPY_DRIVER   = clippy-driver                << 
496 BINDGEN         = bindgen                      << 
497 PAHOLE          = pahole                       << 
498 RESOLVE_BTFIDS  = $(objtree)/tools/bpf/resolve << 
499 LEX             = flex                         << 
500 YACC            = bison                        << 
501 AWK             = awk                             316 AWK             = awk
                                                   >> 317 GENKSYMS        = scripts/genksyms/genksyms
502 INSTALLKERNEL  := installkernel                   318 INSTALLKERNEL  := installkernel
                                                   >> 319 DEPMOD          = /sbin/depmod
                                                   >> 320 KALLSYMS        = scripts/kallsyms
503 PERL            = perl                            321 PERL            = perl
504 PYTHON3         = python3                      << 
505 CHECK           = sparse                          322 CHECK           = sparse
506 BASH            = bash                         << 
507 KGZIP           = gzip                         << 
508 KBZIP2          = bzip2                        << 
509 KLZOP           = lzop                         << 
510 LZMA            = lzma                         << 
511 LZ4             = lz4c                         << 
512 XZ              = xz                           << 
513 ZSTD            = zstd                         << 
514                                                   323 
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    324 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
516                   -Wbitwise -Wno-return-void - !! 325                   -Wbitwise -Wno-return-void $(CF)
517 NOSTDINC_FLAGS :=                              !! 326 MODFLAGS        = -DMODULE
518 CFLAGS_MODULE   =                              !! 327 CFLAGS_MODULE   = $(MODFLAGS)
519 RUSTFLAGS_MODULE =                             !! 328 AFLAGS_MODULE   = $(MODFLAGS)
520 AFLAGS_MODULE   =                              !! 329 LDFLAGS_MODULE  = -T $(srctree)/scripts/module-common.lds
521 LDFLAGS_MODULE  =                              << 
522 CFLAGS_KERNEL   =                                 330 CFLAGS_KERNEL   =
523 RUSTFLAGS_KERNEL =                             << 
524 AFLAGS_KERNEL   =                                 331 AFLAGS_KERNEL   =
525 LDFLAGS_vmlinux =                              !! 332 CFLAGS_GCOV     = -fprofile-arcs -ftest-coverage
526                                                   333 
527 # Use USERINCLUDE when you must reference the  << 
528 USERINCLUDE    := \                            << 
529                 -I$(srctree)/arch/$(SRCARCH)/i << 
530                 -I$(objtree)/arch/$(SRCARCH)/i << 
531                 -I$(srctree)/include/uapi \    << 
532                 -I$(objtree)/include/generated << 
533                 -include $(srctree)/include/li << 
534                 -include $(srctree)/include/li << 
535                                                   334 
536 # Use LINUXINCLUDE when you must reference the    335 # Use LINUXINCLUDE when you must reference the include/ directory.
537 # Needed to be compatible with the O= option      336 # Needed to be compatible with the O= option
538 LINUXINCLUDE    := \                           !! 337 LINUXINCLUDE    := -Iinclude \
539                 -I$(srctree)/arch/$(SRCARCH)/i !! 338                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
540                 -I$(objtree)/arch/$(SRCARCH)/i !! 339                    -I$(srctree)/arch/$(hdr-arch)/include               \
541                 $(if $(building_out_of_srctree !! 340                    -include include/linux/autoconf.h
542                 -I$(objtree)/include \         << 
543                 $(USERINCLUDE)                 << 
544                                                << 
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE     << 
546                                                << 
547 KBUILD_CFLAGS :=                               << 
548 KBUILD_CFLAGS += -std=gnu11                    << 
549 KBUILD_CFLAGS += -fshort-wchar                 << 
550 KBUILD_CFLAGS += -funsigned-char               << 
551 KBUILD_CFLAGS += -fno-common                   << 
552 KBUILD_CFLAGS += -fno-PIE                      << 
553 KBUILD_CFLAGS += -fno-strict-aliasing          << 
554                                                   341 
555 KBUILD_CPPFLAGS := -D__KERNEL__                   342 KBUILD_CPPFLAGS := -D__KERNEL__
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \     << 
557                     -Cpanic=abort -Cembed-bitc << 
558                     -Cforce-unwind-tables=n -C << 
559                     -Csymbol-mangling-version= << 
560                     -Crelocation-model=static  << 
561                     -Zfunction-sections=n \    << 
562                     -Wclippy::float_arithmetic << 
563                                                << 
564 KBUILD_AFLAGS_KERNEL :=                        << 
565 KBUILD_CFLAGS_KERNEL :=                        << 
566 KBUILD_RUSTFLAGS_KERNEL :=                     << 
567 KBUILD_AFLAGS_MODULE  := -DMODULE              << 
568 KBUILD_CFLAGS_MODULE  := -DMODULE              << 
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE        << 
570 KBUILD_LDFLAGS_MODULE :=                       << 
571 KBUILD_LDFLAGS :=                              << 
572 CLANG_FLAGS :=                                 << 
573                                                << 
574 ifeq ($(KBUILD_CLIPPY),1)                      << 
575         RUSTC_OR_CLIPPY_QUIET := CLIPPY        << 
576         RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)     << 
577 else                                           << 
578         RUSTC_OR_CLIPPY_QUIET := RUSTC         << 
579         RUSTC_OR_CLIPPY = $(RUSTC)             << 
580 endif                                          << 
581                                                   343 
582 ifdef RUST_LIB_SRC                             !! 344 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
583         export RUST_LIB_SRC                    !! 345                    -fno-strict-aliasing -fno-common \
584 endif                                          !! 346                    -Werror-implicit-function-declaration \
                                                   >> 347                    -Wno-format-security \
                                                   >> 348                    -fno-delete-null-pointer-checks
                                                   >> 349 KBUILD_AFLAGS   := -D__ASSEMBLY__
585                                                   350 
586 # Allows the usage of unstable features in sta !! 351 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
587 export RUSTC_BOOTSTRAP := 1                    !! 352 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
                                                   >> 353 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
588                                                   354 
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K !! 355 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q !! 356 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS          !! 357 export CPP AR NM STRIP OBJCOPY OBJDUMP
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF !! 358 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_ !! 359 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD     << 
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS  << 
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS    << 
597                                                   360 
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC !! 361 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU !! 362 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF << 
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    363 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU !! 364 
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN !! 365 # When compiling out-of-tree modules, put MODVERDIR in the module
                                                   >> 366 # tree rather than in the kernel tree. The kernel tree might
                                                   >> 367 # even be read-only.
                                                   >> 368 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
604                                                   369 
605 # Files to ignore in find ... statements          370 # Files to ignore in find ... statements
606                                                   371 
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na !! 372 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
608                           -name CVS -o -name . !! 373 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
609                           -prune -o            << 
610                                                   374 
611 # ============================================    375 # ===========================================================================
612 # Rules shared between *config targets and bui    376 # Rules shared between *config targets and build targets
613                                                   377 
614 # Basic helpers built in scripts/basic/        !! 378 # Basic helpers built in scripts/
615 PHONY += scripts_basic                            379 PHONY += scripts_basic
616 scripts_basic:                                    380 scripts_basic:
617         $(Q)$(MAKE) $(build)=scripts/basic        381         $(Q)$(MAKE) $(build)=scripts/basic
618                                                   382 
                                                   >> 383 # To avoid any implicit rule to kick in, define an empty command.
                                                   >> 384 scripts/basic/%: scripts_basic ;
                                                   >> 385 
619 PHONY += outputmakefile                           386 PHONY += outputmakefile
620 ifdef building_out_of_srctree                  << 
621 # Before starting out-of-tree build, make sure << 
622 # outputmakefile generates a Makefile in the o    387 # outputmakefile generates a Makefile in the output directory, if using a
623 # separate output directory. This allows conve    388 # separate output directory. This allows convenient use of make in the
624 # output directory.                               389 # output directory.
625 # At the same time when output Makefile genera << 
626 # ignore whole output directory                << 
627                                                << 
628 quiet_cmd_makefile = GEN     Makefile          << 
629       cmd_makefile = { \                       << 
630         echo "\# Automatically generated by $( << 
631         echo "include $(srctree)/Makefile"; \  << 
632         } > Makefile                           << 
633                                                << 
634 outputmakefile:                                   390 outputmakefile:
635         @if [ -f $(srctree)/.config -o \       !! 391 ifneq ($(KBUILD_SRC),)
636                  -d $(srctree)/include/config  << 
637                  -d $(srctree)/arch/$(SRCARCH) << 
638                 echo >&2 "***"; \              << 
639                 echo >&2 "*** The source tree  << 
640                 echo >&2 "*** in $(abs_srctree << 
641                 echo >&2 "***"; \              << 
642                 false; \                       << 
643         fi                                     << 
644         $(Q)ln -fsn $(srctree) source             392         $(Q)ln -fsn $(srctree) source
645         $(call cmd,makefile)                   !! 393         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
646         $(Q)test -e .gitignore || \            !! 394             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
647         { echo "# this is build directory, ign << 
648 endif                                             395 endif
649                                                   396 
650 # The expansion should be delayed until arch/$ !! 397 # To make sure we do not include .config for any of the *config targets
651 # Some architectures define CROSS_COMPILE in a !! 398 # catch them early, and hand them over to scripts/kconfig/Makefile
652 # CC_VERSION_TEXT is referenced from Kconfig ( !! 399 # It is allowed to specify more targets when calling make, including
653 # and from include/config/auto.conf.cmd to det !! 400 # mixing *config targets and build targets.
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC !! 401 # For example 'make oldconfig all'.
                                                   >> 402 # Detect when mixed targets is specified, and make a second invocation
                                                   >> 403 # of make so .config is not included in this case either (for *config).
                                                   >> 404 
                                                   >> 405 no-dot-config-targets := clean mrproper distclean \
                                                   >> 406                          cscope TAGS tags help %docs check% \
                                                   >> 407                          include/linux/version.h headers_% \
                                                   >> 408                          kernelrelease kernelversion
                                                   >> 409 
                                                   >> 410 config-targets := 0
                                                   >> 411 mixed-targets  := 0
                                                   >> 412 dot-config     := 1
655                                                   413 
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)), !! 414 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
657 include $(srctree)/scripts/Makefile.clang      !! 415         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
                                                   >> 416                 dot-config := 0
                                                   >> 417         endif
658 endif                                             418 endif
659                                                   419 
660 # Include this also for config targets because !! 420 ifeq ($(KBUILD_EXTMOD),)
661 # cc-cross-prefix to determine CROSS_COMPILE.  !! 421         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
662 ifdef need-compiler                            !! 422                 config-targets := 1
663 include $(srctree)/scripts/Makefile.compiler   !! 423                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
                                                   >> 424                         mixed-targets := 1
                                                   >> 425                 endif
                                                   >> 426         endif
664 endif                                             427 endif
665                                                   428 
666 ifdef config-build                             !! 429 ifeq ($(mixed-targets),1)
                                                   >> 430 # ===========================================================================
                                                   >> 431 # We're called with mixed targets (*config and build targets).
                                                   >> 432 # Handle them one by one.
                                                   >> 433 
                                                   >> 434 %:: FORCE
                                                   >> 435         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
                                                   >> 436 
                                                   >> 437 else
                                                   >> 438 ifeq ($(config-targets),1)
667 # ============================================    439 # ===========================================================================
668 # *config targets only - make sure prerequisit    440 # *config targets only - make sure prerequisites are updated, and descend
669 # in scripts/kconfig to make the *config targe    441 # in scripts/kconfig to make the *config target
670                                                   442 
671 # Read arch-specific Makefile to set KBUILD_DE !! 443 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
672 # KBUILD_DEFCONFIG may point out an alternativ    444 # KBUILD_DEFCONFIG may point out an alternative default configuration
673 # used for 'make defconfig'                       445 # used for 'make defconfig'
674 include $(srctree)/arch/$(SRCARCH)/Makefile       446 include $(srctree)/arch/$(SRCARCH)/Makefile
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS !! 447 export KBUILD_DEFCONFIG KBUILD_KCONFIG
676                                                   448 
677 config: outputmakefile scripts_basic FORCE     !! 449 config: scripts_basic outputmakefile FORCE
                                                   >> 450         $(Q)mkdir -p include/linux include/config
678         $(Q)$(MAKE) $(build)=scripts/kconfig $    451         $(Q)$(MAKE) $(build)=scripts/kconfig $@
679                                                   452 
680 %config: outputmakefile scripts_basic FORCE    !! 453 %config: scripts_basic outputmakefile FORCE
                                                   >> 454         $(Q)mkdir -p include/linux include/config
681         $(Q)$(MAKE) $(build)=scripts/kconfig $    455         $(Q)$(MAKE) $(build)=scripts/kconfig $@
682                                                   456 
683 else #!config-build                            !! 457 else
684 # ============================================    458 # ===========================================================================
685 # Build targets only - this includes vmlinux,  !! 459 # Build targets only - this includes vmlinux, arch specific targets, clean
686 # targets and others. In general all targets e    460 # targets and others. In general all targets except *config targets.
687                                                   461 
688 # If building an external module we do not car << 
689 # but instead __all depend on modules          << 
690 PHONY += all                                   << 
691 ifeq ($(KBUILD_EXTMOD),)                          462 ifeq ($(KBUILD_EXTMOD),)
692 __all: all                                     !! 463 # Additional helpers built in scripts/
693 else                                           !! 464 # Carefully list dependencies so we do not try to build scripts twice
694 __all: modules                                 !! 465 # in parallel
695 endif                                          !! 466 PHONY += scripts
696                                                !! 467 scripts: scripts_basic include/config/auto.conf
697 targets :=                                     !! 468         $(Q)$(MAKE) $(build)=$(@)
698                                                << 
699 # Decide whether to build built-in, modular, o << 
700 # Normally, just do built-in.                  << 
701                                                << 
702 KBUILD_MODULES :=                              << 
703 KBUILD_BUILTIN := 1                            << 
704                                                << 
705 # If we have only "make modules", don't compil << 
706 ifeq ($(MAKECMDGOALS),modules)                 << 
707   KBUILD_BUILTIN :=                            << 
708 endif                                          << 
709                                                << 
710 # If we have "make <whatever> modules", compil << 
711 # in addition to whatever we do anyway.        << 
712 # Just "make" or "make all" shall build module << 
713                                                << 
714 ifneq ($(filter all modules nsdeps %compile_co << 
715   KBUILD_MODULES := 1                          << 
716 endif                                          << 
717                                                << 
718 ifeq ($(MAKECMDGOALS),)                        << 
719   KBUILD_MODULES := 1                          << 
720 endif                                          << 
721                                                << 
722 export KBUILD_MODULES KBUILD_BUILTIN           << 
723                                                << 
724 ifdef need-config                              << 
725 include include/config/auto.conf               << 
726 endif                                          << 
727                                                   469 
728 ifeq ($(KBUILD_EXTMOD),)                       << 
729 # Objects we will link into vmlinux / subdirs     470 # Objects we will link into vmlinux / subdirs we need to visit
730 core-y          :=                             !! 471 init-y          := init/
731 drivers-y       :=                             !! 472 drivers-y       := drivers/ sound/ firmware/
                                                   >> 473 net-y           := net/
732 libs-y          := lib/                           474 libs-y          := lib/
                                                   >> 475 core-y          := usr/
733 endif # KBUILD_EXTMOD                             476 endif # KBUILD_EXTMOD
734                                                   477 
735 # The all: target is the default when no targe !! 478 ifeq ($(dot-config),1)
736 # command line.                                !! 479 # Read in config
737 # This allow a user to issue only 'make' to bu !! 480 -include include/config/auto.conf
738 # Defaults to vmlinux, but the arch makefile u << 
739 all: vmlinux                                   << 
740                                                << 
741 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover << 
742 ifdef CONFIG_CC_IS_GCC                         << 
743 CFLAGS_GCOV     += -fno-tree-loop-im           << 
744 endif                                          << 
745 export CFLAGS_GCOV                             << 
746                                                << 
747 # The arch Makefiles can override CC_FLAGS_FTR << 
748 ifdef CONFIG_FUNCTION_TRACER                   << 
749   CC_FLAGS_FTRACE := -pg                       << 
750 endif                                          << 
751                                                   481 
752 include $(srctree)/arch/$(SRCARCH)/Makefile    !! 482 ifeq ($(KBUILD_EXTMOD),)
753                                                !! 483 # Read in dependencies to all Kconfig* files, make sure to run
754 ifdef need-config                              !! 484 # oldconfig if changes are detected.
755 ifdef may-sync-config                          !! 485 -include include/config/auto.conf.cmd
756 # Read in dependencies to all Kconfig* files,  !! 486 
757 # changes are detected. This should be include !! 487 # To avoid any implicit rule to kick in, define an empty command
758 # because some architectures define CROSS_COMP !! 488 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
759 include include/config/auto.conf.cmd           !! 489 
760                                                !! 490 # If .config is newer than include/config/auto.conf, someone tinkered
761 $(KCONFIG_CONFIG):                             !! 491 # with it and forgot to run make oldconfig.
762         @echo >&2 '***'                        !! 492 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
763         @echo >&2 '*** Configuration file "$@" !! 493 # we execute the config step to be sure to catch updated Kconfig files
764         @echo >&2 '***'                        !! 494 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
765         @echo >&2 '*** Please run some configu !! 495         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
766         @echo >&2 '*** "make menuconfig" or "m !! 496 else
767         @echo >&2 '***'                        !! 497 # external modules needs include/linux/autoconf.h and include/config/auto.conf
768         @/bin/false                            !! 498 # but do not care if they are up-to-date. Use auto.conf to trigger the test
769                                                << 
770 # The actual configuration files used during t << 
771 # include/generated/ and include/config/. Upda << 
772 # include/config/auto.conf (which mirrors .con << 
773 #                                              << 
774 # This exploits the 'multi-target pattern rule << 
775 # The syncconfig should be executed only once  << 
776 # (Note: use the grouped target '&:' when we b << 
777 #                                              << 
778 # Do not use $(call cmd,...) here. That would  << 
779 # so you cannot notice that Kconfig is waiting << 
780 %/config/auto.conf %/config/auto.conf.cmd %/ge << 
781         $(Q)$(kecho) "  SYNC    $@"            << 
782         $(Q)$(MAKE) -f $(srctree)/Makefile syn << 
783 else # !may-sync-config                        << 
784 # External modules and some install targets ne << 
785 # and include/config/auto.conf but do not care << 
786 # Use auto.conf to trigger the test            << 
787 PHONY += include/config/auto.conf                 499 PHONY += include/config/auto.conf
788                                                   500 
789 include/config/auto.conf:                         501 include/config/auto.conf:
790         @test -e include/generated/autoconf.h  !! 502         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
791         echo >&2;                              !! 503         echo;                                                           \
792         echo >&2 "  ERROR: Kernel configuratio !! 504         echo "  ERROR: Kernel configuration is invalid.";               \
793         echo >&2 "         include/generated/a !! 505         echo "         include/linux/autoconf.h or $@ are missing.";    \
794         echo >&2 "         Run 'make oldconfig !! 506         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
795         echo >&2 ;                             !! 507         echo;                                                           \
796         /bin/false)                               508         /bin/false)
797                                                   509 
798 endif # may-sync-config                        !! 510 endif # KBUILD_EXTMOD
799 endif # need-config                            !! 511 
                                                   >> 512 else
                                                   >> 513 # Dummy target needed, because used as prerequisite
                                                   >> 514 include/config/auto.conf: ;
                                                   >> 515 endif # $(dot-config)
800                                                   516 
801 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch !! 517 # The all: target is the default when no target is given on the
                                                   >> 518 # command line.
                                                   >> 519 # This allow a user to issue only 'make' to build a kernel including modules
                                                   >> 520 # Defaults vmlinux but it is usually overridden in the arch makefile
                                                   >> 521 all: vmlinux
802                                                   522 
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE       !! 523 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
804 KBUILD_CFLAGS += -O2                           !! 524 KBUILD_CFLAGS   += -Os
805 KBUILD_RUSTFLAGS += -Copt-level=2              !! 525 else
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE         !! 526 KBUILD_CFLAGS   += -O2
807 KBUILD_CFLAGS += -Os                           << 
808 KBUILD_RUSTFLAGS += -Copt-level=s              << 
809 endif                                             527 endif
810                                                   528 
811 # Always set `debug-assertions` and `overflow- !! 529 include $(srctree)/arch/$(SRCARCH)/Makefile
812 # depends on `opt-level` and `debug-assertions << 
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $( << 
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C << 
815                                                   530 
816 # Tell gcc to never replace conditional load w !! 531 ifneq ($(CONFIG_FRAME_WARN),0)
817 ifdef CONFIG_CC_IS_GCC                         !! 532 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
818 # gcc-10 renamed --param=allow-store-data-race << 
819 # -fno-allow-store-data-races.                 << 
820 KBUILD_CFLAGS   += $(call cc-option,--param=al << 
821 KBUILD_CFLAGS   += $(call cc-option,-fno-allow << 
822 endif                                             533 endif
823                                                   534 
824 ifdef CONFIG_READABLE_ASM                      !! 535 # Force gcc to behave correct even for buggy distributions
825 # Disable optimizations that make assembler li !! 536 ifndef CONFIG_CC_STACKPROTECTOR
826 # reorder blocks reorders the control in the f !! 537 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
827 # ipa clone creates specialized cloned functio << 
828 # partial inlining inlines only parts of funct << 
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa- << 
830 endif                                             538 endif
831                                                   539 
832 stackp-flags-y                                 !! 540 # This warning generated too much noise in a regular build.
833 stackp-flags-$(CONFIG_STACKPROTECTOR)          !! 541 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)   << 
835                                                << 
836 KBUILD_CFLAGS += $(stackp-flags-y)             << 
837                                                << 
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning << 
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)      << 
840                                                   542 
841 ifdef CONFIG_FRAME_POINTER                        543 ifdef CONFIG_FRAME_POINTER
842 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    544 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y   << 
844 else                                              545 else
845 # Some targets (ARM with Thumb2, for example), << 
846 # pointers.  For those, we don't have FUNCTION << 
847 # select FRAME_POINTER.  However, FUNCTION_TRA << 
848 # incompatible with -fomit-frame-pointer with  << 
849 # -fomit-frame-pointer with FUNCTION_TRACER.   << 
850 # In the Rust target specification, "frame-poi << 
851 # to "may-omit".                               << 
852 ifndef CONFIG_FUNCTION_TRACER                  << 
853 KBUILD_CFLAGS   += -fomit-frame-pointer           546 KBUILD_CFLAGS   += -fomit-frame-pointer
854 endif                                             547 endif
855 endif                                          << 
856                                                   548 
857 # Initialize all stack variables with a 0xAA p !! 549 ifdef CONFIG_DEBUG_INFO
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN            !! 550 KBUILD_CFLAGS   += -g
859 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat !! 551 KBUILD_AFLAGS   += -gdwarf-2
860 endif                                          << 
861                                                << 
862 # Initialize all stack variables with a zero v << 
863 ifdef CONFIG_INIT_STACK_ALL_ZERO               << 
864 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer << 
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER << 
866 # https://github.com/llvm/llvm-project/issues/ << 
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi << 
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER           << 
869 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA << 
870 endif                                          << 
871 endif                                          << 
872                                                << 
873 # While VLAs have been removed, GCC produces u << 
874 # for the randomize_kstack_offset feature. Dis << 
875 KBUILD_CFLAGS   += $(call cc-option, -fno-stac << 
876                                                << 
877 # Clear used registers at func exit (to reduce << 
878 ifdef CONFIG_ZERO_CALL_USED_REGS               << 
879 KBUILD_CFLAGS   += -fzero-call-used-regs=used- << 
880 endif                                             552 endif
881                                                   553 
882 ifdef CONFIG_FUNCTION_TRACER                      554 ifdef CONFIG_FUNCTION_TRACER
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC              !! 555 KBUILD_CFLAGS   += -pg
884   CC_FLAGS_FTRACE       += -mrecord-mcount     << 
885   ifdef CONFIG_HAVE_NOP_MCOUNT                 << 
886     ifeq ($(call cc-option-yn, -mnop-mcount),y << 
887       CC_FLAGS_FTRACE   += -mnop-mcount        << 
888       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU << 
889     endif                                      << 
890   endif                                        << 
891 endif                                          << 
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL         << 
893   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT         << 
894     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU << 
895   endif                                        << 
896 endif                                          << 
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT    << 
898   ifdef CONFIG_HAVE_C_RECORDMCOUNT             << 
899     BUILD_C_RECORDMCOUNT := y                  << 
900     export BUILD_C_RECORDMCOUNT                << 
901   endif                                        << 
902 endif                                          << 
903 ifdef CONFIG_HAVE_FENTRY                       << 
904   # s390-linux-gnu-gcc did not support -mfentr << 
905   ifeq ($(call cc-option-yn, -mfentry),y)      << 
906     CC_FLAGS_FTRACE     += -mfentry            << 
907     CC_FLAGS_USING      += -DCC_USING_FENTRY   << 
908   endif                                        << 
909 endif                                          << 
910 export CC_FLAGS_FTRACE                         << 
911 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA << 
912 KBUILD_AFLAGS   += $(CC_FLAGS_USING)           << 
913 endif                                             556 endif
914                                                   557 
915 # We trigger additional mismatches with less i    558 # We trigger additional mismatches with less inlining
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH               559 ifdef CONFIG_DEBUG_SECTION_MISMATCH
917 KBUILD_CFLAGS += -fno-inline-functions-called- !! 560 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
918 endif                                          << 
919                                                << 
920 # `rustc`'s `-Zfunction-sections` applies to d << 
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION     << 
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f << 
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections << 
924 LDFLAGS_vmlinux += --gc-sections               << 
925 endif                                          << 
926                                                << 
927 ifdef CONFIG_SHADOW_CALL_STACK                 << 
928 ifndef CONFIG_DYNAMIC_SCS                      << 
929 CC_FLAGS_SCS    := -fsanitize=shadow-call-stac << 
930 KBUILD_CFLAGS   += $(CC_FLAGS_SCS)             << 
931 endif                                          << 
932 export CC_FLAGS_SCS                            << 
933 endif                                          << 
934                                                << 
935 ifdef CONFIG_LTO_CLANG                         << 
936 ifdef CONFIG_LTO_CLANG_THIN                    << 
937 CC_FLAGS_LTO    := -flto=thin -fsplit-lto-unit << 
938 else                                           << 
939 CC_FLAGS_LTO    := -flto                       << 
940 endif                                          << 
941 CC_FLAGS_LTO    += -fvisibility=hidden         << 
942                                                << 
943 # Limit inlining across translation units to r << 
944 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 << 
945 endif                                          << 
946                                                << 
947 ifdef CONFIG_LTO                               << 
948 KBUILD_CFLAGS   += -fno-lto $(CC_FLAGS_LTO)    << 
949 KBUILD_AFLAGS   += -fno-lto                    << 
950 export CC_FLAGS_LTO                            << 
951 endif                                          << 
952                                                << 
953 ifdef CONFIG_CFI_CLANG                         << 
954 CC_FLAGS_CFI    := -fsanitize=kcfi             << 
955 KBUILD_CFLAGS   += $(CC_FLAGS_CFI)             << 
956 export CC_FLAGS_CFI                            << 
957 endif                                          << 
958                                                << 
959 # Architectures can define flags to add/remove << 
960 CC_FLAGS_FPU    += -D_LINUX_FPU_COMPILATION_UN << 
961 export CC_FLAGS_FPU                            << 
962 export CC_FLAGS_NO_FPU                         << 
963                                                << 
964 ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)         << 
965 # Set the minimal function alignment. Use the  << 
966 # -fmin-function-alignment if it is available, << 
967 # See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNME << 
968 ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT     << 
969 KBUILD_CFLAGS += -fmin-function-alignment=$(CO << 
970 else                                           << 
971 KBUILD_CFLAGS += -falign-functions=$(CONFIG_FU << 
972 endif                                          << 
973 endif                                             561 endif
974                                                   562 
975 # arch Makefile may override CC so keep this a    563 # arch Makefile may override CC so keep this after arch Makefile is included
976 NOSTDINC_FLAGS += -nostdinc                    !! 564 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
                                                   >> 565 CHECKFLAGS     += $(NOSTDINC_FLAGS)
                                                   >> 566 
                                                   >> 567 # warn about C99 declaration after statement
                                                   >> 568 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
977                                                   569 
978 # To gain proper coverage for CONFIG_UBSAN_BOU !! 570 # disable pointer signed / unsigned warnings in gcc 4.0
979 # the kernel uses only C99 flexible arrays for !! 571 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
980 # arrays. Enforce this for everything that may << 
981 # perform bounds checking.                     << 
982 KBUILD_CFLAGS += $(call cc-option, -fstrict-fl << 
983                                                << 
984 #Currently, disable -Wstringop-overflow for GC << 
985 KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW << 
986 KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) + << 
987                                                   572 
988 # disable invalid "can't wrap" optimizations f    573 # disable invalid "can't wrap" optimizations for signed / pointers
989 KBUILD_CFLAGS   += -fno-strict-overflow        !! 574 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
990                                                   575 
991 # Make sure -fstack-check isn't enabled (like  !! 576 # revert to pre-gcc-4.4 behaviour of .eh_frame
992 KBUILD_CFLAGS  += -fno-stack-check             !! 577 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
993                                                   578 
994 # conserve stack if available                     579 # conserve stack if available
995 ifdef CONFIG_CC_IS_GCC                         !! 580 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
996 KBUILD_CFLAGS   += -fconserve-stack            << 
997 endif                                          << 
998                                                << 
999 # change __FILE__ to the relative path from th << 
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p << 
1001                                                  581 
1002 # include additional Makefiles when needed    !! 582 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1003 include-y                       := scripts/Ma !! 583 # But warn user when we do so
1004 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma !! 584 warn-assign = \
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma !! 585 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
1006 include-$(CONFIG_KASAN)         += scripts/Ma !! 586 
1007 include-$(CONFIG_KCSAN)         += scripts/Ma !! 587 ifneq ($(KCPPFLAGS),)
1008 include-$(CONFIG_KMSAN)         += scripts/Ma !! 588         $(call warn-assign,CPPFLAGS)
1009 include-$(CONFIG_UBSAN)         += scripts/Ma !! 589         KBUILD_CPPFLAGS += $(KCPPFLAGS)
1010 include-$(CONFIG_KCOV)          += scripts/Ma !! 590 endif
1011 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma !! 591 ifneq ($(KAFLAGS),)
1012 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma !! 592         $(call warn-assign,AFLAGS)
1013                                               !! 593         KBUILD_AFLAGS += $(KAFLAGS)
1014 include $(addprefix $(srctree)/, $(include-y) !! 594 endif
1015                                               !! 595 ifneq ($(KCFLAGS),)
1016 # scripts/Makefile.gcc-plugins is intentional !! 596         $(call warn-assign,CFLAGS)
1017 # Do not add $(call cc-option,...) below this !! 597         KBUILD_CFLAGS += $(KCFLAGS)
1018 # from the clean source tree, the GCC plugins !! 598 endif
1019                                               !! 599 
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS  !! 600 # Use --build-id when available.
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS)               !! 601 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
1022 KBUILD_AFLAGS   += $(KAFLAGS)                 !! 602                               $(call cc-ldoption, -Wl$(comma)--build-id,))
1023 KBUILD_CFLAGS   += $(KCFLAGS)                 !! 603 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)             !! 604 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
1025                                               << 
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1      << 
1027 LDFLAGS_vmlinux += --build-id=sha1            << 
1028                                               << 
1029 KBUILD_LDFLAGS  += -z noexecstack             << 
1030 ifeq ($(CONFIG_LD_IS_BFD),y)                  << 
1031 KBUILD_LDFLAGS  += $(call ld-option,--no-warn << 
1032 endif                                         << 
1033                                                  605 
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)                606 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1035 LDFLAGS_vmlinux += -X                         !! 607 LDFLAGS_vmlinux += $(call ld-option, -X,)
1036 endif                                         << 
1037                                               << 
1038 ifeq ($(CONFIG_RELR),y)                       << 
1039 # ld.lld before 15 did not support -z pack-re << 
1040 LDFLAGS_vmlinux += $(call ld-option,--pack-dy << 
1041 endif                                         << 
1042                                               << 
1043 # We never want expected sections to be place << 
1044 # linker. All sections should be explicitly n << 
1045 ifdef CONFIG_LD_ORPHAN_WARN                   << 
1046 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG << 
1047 endif                                            608 endif
1048                                                  609 
1049 # Align the bit size of userspace programs wi << 
1050 KBUILD_USERCFLAGS  += $(filter -m32 -m64 --ta << 
1051 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --ta << 
1052                                               << 
1053 # make the checker run with the right archite << 
1054 CHECKFLAGS += --arch=$(ARCH)                  << 
1055                                               << 
1056 # insure the checker run with the right endia << 
1057 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),- << 
1058                                               << 
1059 # the checker needs the correct machine size  << 
1060 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) << 
1061                                               << 
1062 # Default kernel image to build when no speci    610 # Default kernel image to build when no specific target is given.
1063 # KBUILD_IMAGE may be overruled on the comman    611 # KBUILD_IMAGE may be overruled on the command line or
1064 # set in the environment                         612 # set in the environment
1065 # Also any assignments in arch/$(ARCH)/Makefi    613 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1066 # this default value                             614 # this default value
1067 export KBUILD_IMAGE ?= vmlinux                   615 export KBUILD_IMAGE ?= vmlinux
1068                                                  616 
1069 #                                                617 #
1070 # INSTALL_PATH specifies where to place the u    618 # INSTALL_PATH specifies where to place the updated kernel and system map
1071 # images. Default is /boot, but you can set i    619 # images. Default is /boot, but you can set it to other values
1072 export  INSTALL_PATH ?= /boot                    620 export  INSTALL_PATH ?= /boot
1073                                                  621 
1074 #                                                622 #
1075 # INSTALL_DTBS_PATH specifies a prefix for re << 
1076 # Like INSTALL_MOD_PATH, it isn't defined in  << 
1077 # an argument if needed. Otherwise it default << 
1078 #                                             << 
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d << 
1080                                               << 
1081 #                                             << 
1082 # INSTALL_MOD_PATH specifies a prefix to MODL    623 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1083 # relocations required by build roots.  This     624 # relocations required by build roots.  This is not defined in the
1084 # makefile but the argument can be passed to     625 # makefile but the argument can be passed to make if needed.
1085 #                                                626 #
1086                                                  627 
1087 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    628 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1088 export MODLIB                                    629 export MODLIB
1089                                                  630 
1090 PHONY += prepare0                             !! 631 #
                                                   >> 632 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
                                                   >> 633 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
                                                   >> 634 #  the default option --strip-debug will be used.  Otherwise,
                                                   >> 635 #  INSTALL_MOD_STRIP will used as the options to the strip command.
                                                   >> 636 
                                                   >> 637 ifdef INSTALL_MOD_STRIP
                                                   >> 638 ifeq ($(INSTALL_MOD_STRIP),1)
                                                   >> 639 mod_strip_cmd = $(STRIP) --strip-debug
                                                   >> 640 else
                                                   >> 641 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
                                                   >> 642 endif # INSTALL_MOD_STRIP=1
                                                   >> 643 else
                                                   >> 644 mod_strip_cmd = true
                                                   >> 645 endif # INSTALL_MOD_STRIP
                                                   >> 646 export mod_strip_cmd
1091                                                  647 
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD), << 
1093 export MODORDER := $(extmod_prefix)modules.or << 
1094 export MODULES_NSDEPS := $(extmod_prefix)modu << 
1095                                                  648 
1096 ifeq ($(KBUILD_EXTMOD),)                         649 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 650 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1097                                                  651 
1098 build-dir       := .                          !! 652 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
1099 clean-dirs      := $(sort . Documentation \   !! 653                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1100                      $(patsubst %/,%,$(filter !! 654                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
1101                         $(drivers-) $(libs-)) !! 655 
1102                                               !! 656 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
1103 export ARCH_CORE        := $(core-y)          !! 657                      $(init-n) $(init-) \
1104 export ARCH_LIB         := $(filter %/, $(lib !! 658                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
1105 export ARCH_DRIVERS     := $(drivers-y) $(dri !! 659                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
1106 # Externally visible symbols (used by link-vm !! 660 
                                                   >> 661 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
                                                   >> 662 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
                                                   >> 663 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
                                                   >> 664 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
                                                   >> 665 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
                                                   >> 666 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
                                                   >> 667 libs-y          := $(libs-y1) $(libs-y2)
                                                   >> 668 
                                                   >> 669 # Build vmlinux
                                                   >> 670 # ---------------------------------------------------------------------------
                                                   >> 671 # vmlinux is built from the objects selected by $(vmlinux-init) and
                                                   >> 672 # $(vmlinux-main). Most are built-in.o files from top-level directories
                                                   >> 673 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
                                                   >> 674 # Ordering when linking is important, and $(vmlinux-init) must be first.
                                                   >> 675 #
                                                   >> 676 # vmlinux
                                                   >> 677 #   ^
                                                   >> 678 #   |
                                                   >> 679 #   +-< $(vmlinux-init)
                                                   >> 680 #   |   +--< init/version.o + more
                                                   >> 681 #   |
                                                   >> 682 #   +--< $(vmlinux-main)
                                                   >> 683 #   |    +--< driver/built-in.o mm/built-in.o + more
                                                   >> 684 #   |
                                                   >> 685 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
                                                   >> 686 #
                                                   >> 687 # vmlinux version (uname -v) cannot be updated during normal
                                                   >> 688 # descending-into-subdirs phase since we do not yet know if we need to
                                                   >> 689 # update vmlinux.
                                                   >> 690 # Therefore this step is delayed until just before final link of vmlinux -
                                                   >> 691 # except in the kallsyms case where it is done just before adding the
                                                   >> 692 # symbols to the kernel.
                                                   >> 693 #
                                                   >> 694 # System.map is generated to document addresses of all kernel symbols
                                                   >> 695 
                                                   >> 696 vmlinux-init := $(head-y) $(init-y)
                                                   >> 697 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
                                                   >> 698 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
                                                   >> 699 vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
                                                   >> 700 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
                                                   >> 701 
                                                   >> 702 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
                                                   >> 703 # May be overridden by arch/$(ARCH)/Makefile
                                                   >> 704 quiet_cmd_vmlinux__ ?= LD      $@
                                                   >> 705       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
                                                   >> 706       -T $(vmlinux-lds) $(vmlinux-init)                          \
                                                   >> 707       --start-group $(vmlinux-main) --end-group                  \
                                                   >> 708       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
                                                   >> 709 
                                                   >> 710 # Generate new vmlinux version
                                                   >> 711 quiet_cmd_vmlinux_version = GEN     .version
                                                   >> 712       cmd_vmlinux_version = set -e;                     \
                                                   >> 713         if [ ! -r .version ]; then                      \
                                                   >> 714           rm -f .version;                               \
                                                   >> 715           echo 1 >.version;                             \
                                                   >> 716         else                                            \
                                                   >> 717           mv .version .old_version;                     \
                                                   >> 718           expr 0$$(cat .old_version) + 1 >.version;     \
                                                   >> 719         fi;                                             \
                                                   >> 720         $(MAKE) $(build)=init
                                                   >> 721 
                                                   >> 722 # Generate System.map
                                                   >> 723 quiet_cmd_sysmap = SYSMAP
                                                   >> 724       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
                                                   >> 725 
                                                   >> 726 # Link of vmlinux
                                                   >> 727 # If CONFIG_KALLSYMS is set .version is already updated
                                                   >> 728 # Generate System.map and verify that the content is consistent
                                                   >> 729 # Use + in front of the vmlinux_version rule to silent warning with make -j2
                                                   >> 730 # First command is ':' to allow us to use + in front of the rule
                                                   >> 731 define rule_vmlinux__
                                                   >> 732         :
                                                   >> 733         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
                                                   >> 734 
                                                   >> 735         $(call cmd,vmlinux__)
                                                   >> 736         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
                                                   >> 737 
                                                   >> 738         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
                                                   >> 739           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
                                                   >> 740         $(cmd_sysmap) $@ System.map;                                         \
                                                   >> 741         if [ $$? -ne 0 ]; then                                               \
                                                   >> 742                 rm -f $@;                                                    \
                                                   >> 743                 /bin/false;                                                  \
                                                   >> 744         fi;
                                                   >> 745         $(verify_kallsyms)
                                                   >> 746 endef
1107                                                  747 
1108 KBUILD_VMLINUX_OBJS := ./built-in.a           !! 748 
1109 ifdef CONFIG_MODULES                          !! 749 ifdef CONFIG_KALLSYMS
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a !! 750 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib !! 751 # It's a three stage process:
                                                   >> 752 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
                                                   >> 753 #   empty
                                                   >> 754 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
                                                   >> 755 #   the right size - vmlinux version (uname -v) is updated during this step
                                                   >> 756 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
                                                   >> 757 #   but due to the added section, some addresses have shifted.
                                                   >> 758 #   From here, we generate a correct .tmp_kallsyms2.o
                                                   >> 759 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
                                                   >> 760 # o Verify that the System.map from vmlinux matches the map from
                                                   >> 761 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
                                                   >> 762 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
                                                   >> 763 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
                                                   >> 764 #   temporary bypass to allow the kernel to be built while the
                                                   >> 765 #   maintainers work out what went wrong with kallsyms.
                                                   >> 766 
                                                   >> 767 ifdef CONFIG_KALLSYMS_EXTRA_PASS
                                                   >> 768 last_kallsyms := 3
1112 else                                             769 else
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, !! 770 last_kallsyms := 2
1114 endif                                            771 endif
1115                                                  772 
1116 export KBUILD_VMLINUX_LIBS                    !! 773 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
1117 export KBUILD_LDS          := arch/$(SRCARCH) << 
1118                                                  774 
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS                !! 775 define verify_kallsyms
1120 # For the kernel to actually contain only the !! 776         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
1121 # we have to build modules as well to determi !! 777           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
1122 KBUILD_MODULES := 1                           !! 778           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
                                                   >> 779         $(Q)cmp -s System.map .tmp_System.map ||                             \
                                                   >> 780                 (echo Inconsistent kallsyms data;                            \
                                                   >> 781                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
                                                   >> 782                  rm .tmp_kallsyms* ; /bin/false )
                                                   >> 783 endef
                                                   >> 784 
                                                   >> 785 # Update vmlinux version before link
                                                   >> 786 # Use + in front of this rule to silent warning about make -j1
                                                   >> 787 # First command is ':' to allow us to use + in front of this rule
                                                   >> 788 cmd_ksym_ld = $(cmd_vmlinux__)
                                                   >> 789 define rule_ksym_ld
                                                   >> 790         : 
                                                   >> 791         +$(call cmd,vmlinux_version)
                                                   >> 792         $(call cmd,vmlinux__)
                                                   >> 793         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
                                                   >> 794 endef
                                                   >> 795 
                                                   >> 796 # Generate .S file with all kernel symbols
                                                   >> 797 quiet_cmd_kallsyms = KSYM    $@
                                                   >> 798       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
                                                   >> 799                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
                                                   >> 800 
                                                   >> 801 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
                                                   >> 802         $(call if_changed_dep,as_o_S)
                                                   >> 803 
                                                   >> 804 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
                                                   >> 805         $(call cmd,kallsyms)
                                                   >> 806 
                                                   >> 807 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
                                                   >> 808 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
                                                   >> 809         $(call if_changed_rule,ksym_ld)
                                                   >> 810 
                                                   >> 811 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
                                                   >> 812         $(call if_changed,vmlinux__)
                                                   >> 813 
                                                   >> 814 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
                                                   >> 815         $(call if_changed,vmlinux__)
                                                   >> 816 
                                                   >> 817 # Needs to visit scripts/ before $(KALLSYMS) can be used.
                                                   >> 818 $(KALLSYMS): scripts ;
                                                   >> 819 
                                                   >> 820 # Generate some data for debugging strange kallsyms problems
                                                   >> 821 debug_kallsyms: .tmp_map$(last_kallsyms)
                                                   >> 822 
                                                   >> 823 .tmp_map%: .tmp_vmlinux% FORCE
                                                   >> 824         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
                                                   >> 825 
                                                   >> 826 .tmp_map3: .tmp_map2
                                                   >> 827 
                                                   >> 828 .tmp_map2: .tmp_map1
                                                   >> 829 
                                                   >> 830 endif # ifdef CONFIG_KALLSYMS
                                                   >> 831 
                                                   >> 832 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
                                                   >> 833 # relevant sections renamed as per the linker script.
                                                   >> 834 quiet_cmd_vmlinux-modpost = LD      $@
                                                   >> 835       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
                                                   >> 836          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
                                                   >> 837          $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
                                                   >> 838 define rule_vmlinux-modpost
                                                   >> 839         :
                                                   >> 840         +$(call cmd,vmlinux-modpost)
                                                   >> 841         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
                                                   >> 842         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
                                                   >> 843 endef
                                                   >> 844 
                                                   >> 845 # vmlinux image - including updated kernel symbols
                                                   >> 846 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
                                                   >> 847 ifdef CONFIG_HEADERS_CHECK
                                                   >> 848         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
                                                   >> 849 endif
                                                   >> 850 ifdef CONFIG_SAMPLES
                                                   >> 851         $(Q)$(MAKE) $(build)=samples
                                                   >> 852 endif
                                                   >> 853 ifdef CONFIG_BUILD_DOCSRC
                                                   >> 854         $(Q)$(MAKE) $(build)=Documentation
                                                   >> 855 endif
                                                   >> 856         $(call vmlinux-modpost)
                                                   >> 857         $(call if_changed_rule,vmlinux__)
                                                   >> 858         $(Q)rm -f .old_version
                                                   >> 859 
                                                   >> 860 # build vmlinux.o first to catch section mismatch errors early
                                                   >> 861 ifdef CONFIG_KALLSYMS
                                                   >> 862 .tmp_vmlinux1: vmlinux.o
1123 endif                                            863 endif
1124                                                  864 
1125 # '$(AR) mPi' needs 'T' to workaround the bug !! 865 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
1126 quiet_cmd_ar_vmlinux.a = AR      $@           !! 866 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
1127       cmd_ar_vmlinux.a = \                    !! 867         $(call if_changed_rule,vmlinux-modpost)
1128         rm -f $@; \                           << 
1129         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS << 
1130         $(AR) mPiT $$($(AR) t $@ | sed -n 1p) << 
1131                                               << 
1132 targets += vmlinux.a                          << 
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea << 
1134         $(call if_changed,ar_vmlinux.a)       << 
1135                                               << 
1136 PHONY += vmlinux_o                            << 
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)   << 
1138         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1139                                               << 
1140 vmlinux.o modules.builtin.modinfo modules.bui << 
1141         @:                                    << 
1142                                               << 
1143 PHONY += vmlinux                              << 
1144 # LDFLAGS_vmlinux in the top Makefile defines << 
1145 # not for decompressors. LDFLAGS_vmlinux in a << 
1146 # unrelated; the decompressors just happen to << 
1147 # arch/*/boot/compressed/vmlinux.             << 
1148 # Export LDFLAGS_vmlinux only to scripts/Make << 
1149 #                                             << 
1150 # _LDFLAGS_vmlinux is a workaround for the 'p << 
1151 #   https://savannah.gnu.org/bugs/?61463      << 
1152 # For Make > 4.4, the following simple code w << 
1153 #  vmlinux: private export LDFLAGS_vmlinux := << 
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG << 
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_ << 
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost      << 
1157         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1158                                                  868 
1159 # The actual objects are generated when desce !! 869 # The actual objects are generated when descending, 
1160 # make sure no implicit rule kicks in            870 # make sure no implicit rule kicks in
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $ !! 871 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
1162                                                  872 
1163 ifeq ($(origin KERNELRELEASE),file)           !! 873 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1164 filechk_kernel.release = $(srctree)/scripts/s !! 874 # Preset locale variables to speed up the build process. Limit locale
                                                   >> 875 # tweaks to this spot to avoid wrong language settings when running
                                                   >> 876 # make menuconfig etc.
                                                   >> 877 # Error messages still appears in the original language
                                                   >> 878 
                                                   >> 879 PHONY += $(vmlinux-dirs)
                                                   >> 880 $(vmlinux-dirs): prepare scripts
                                                   >> 881         $(Q)$(MAKE) $(build)=$@
                                                   >> 882 
                                                   >> 883 # Build the kernel release string
                                                   >> 884 #
                                                   >> 885 # The KERNELRELEASE value built here is stored in the file
                                                   >> 886 # include/config/kernel.release, and is used when executing several
                                                   >> 887 # make targets, such as "make install" or "make modules_install."
                                                   >> 888 #
                                                   >> 889 # The eventual kernel release string consists of the following fields,
                                                   >> 890 # shown in a hierarchical format to show how smaller parts are concatenated
                                                   >> 891 # to form the larger and final value, with values coming from places like
                                                   >> 892 # the Makefile, kernel config options, make command line options and/or
                                                   >> 893 # SCM tag information.
                                                   >> 894 #
                                                   >> 895 #       $(KERNELVERSION)
                                                   >> 896 #         $(VERSION)                    eg, 2
                                                   >> 897 #         $(PATCHLEVEL)                 eg, 6
                                                   >> 898 #         $(SUBLEVEL)                   eg, 18
                                                   >> 899 #         $(EXTRAVERSION)               eg, -rc6
                                                   >> 900 #       $(localver-full)
                                                   >> 901 #         $(localver)
                                                   >> 902 #           localversion*               (files without backups, containing '~')
                                                   >> 903 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
                                                   >> 904 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
                                                   >> 905 #           ./scripts/setlocalversion   (SCM tag, if one exists)
                                                   >> 906 #           $(LOCALVERSION)             (from make command line if provided)
                                                   >> 907 #
                                                   >> 908 #  Note how the final $(localver-auto) string is included *only* if the
                                                   >> 909 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
                                                   >> 910 # moment, only git is supported but other SCMs can edit the script
                                                   >> 911 # scripts/setlocalversion and add the appropriate checks as needed.
                                                   >> 912 
                                                   >> 913 pattern = ".*/localversion[^~]*"
                                                   >> 914 string  = $(shell cat /dev/null \
                                                   >> 915            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
                                                   >> 916 
                                                   >> 917 localver = $(subst $(space),, $(string) \
                                                   >> 918                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
                                                   >> 919 
                                                   >> 920 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
                                                   >> 921 # and if the SCM is know a tag from the SCM is appended.
                                                   >> 922 # The appended tag is determined by the SCM used.
                                                   >> 923 #
                                                   >> 924 # .scmversion is used when generating rpm packages so we do not loose
                                                   >> 925 # the version information from the SCM when we do the build of the kernel
                                                   >> 926 # from the copied source
                                                   >> 927 ifdef CONFIG_LOCALVERSION_AUTO
                                                   >> 928 
                                                   >> 929 ifeq ($(wildcard .scmversion),)
                                                   >> 930         _localver-auto = $(shell $(CONFIG_SHELL) \
                                                   >> 931                          $(srctree)/scripts/setlocalversion $(srctree))
1165 else                                             932 else
1166 filechk_kernel.release = echo $(KERNELRELEASE !! 933         _localver-auto = $(shell cat .scmversion 2> /dev/null)
1167 endif                                            934 endif
1168                                                  935 
1169 # Store (new) KERNELRELEASE string in include !! 936         localver-auto  = $(LOCALVERSION)$(_localver-auto)
1170 include/config/kernel.release: FORCE          !! 937 endif
1171         $(call filechk,kernel.release)        !! 938 
                                                   >> 939 localver-full = $(localver)$(localver-auto)
                                                   >> 940 
                                                   >> 941 # Store (new) KERNELRELASE string in include/config/kernel.release
                                                   >> 942 kernelrelease = $(KERNELVERSION)$(localver-full)
                                                   >> 943 include/config/kernel.release: include/config/auto.conf FORCE
                                                   >> 944         $(Q)rm -f $@
                                                   >> 945         $(Q)echo $(kernelrelease) > $@
1172                                                  946 
1173 # Additional helpers built in scripts/        << 
1174 # Carefully list dependencies so we do not tr << 
1175 # in parallel                                 << 
1176 PHONY += scripts                              << 
1177 scripts: scripts_basic scripts_dtc            << 
1178         $(Q)$(MAKE) $(build)=$(@)             << 
1179                                                  947 
1180 # Things we need to do before we recursively     948 # Things we need to do before we recursively start building the kernel
1181 # or the modules are listed in "prepare".        949 # or the modules are listed in "prepare".
1182 # A multi level approach is used. prepareN is    950 # A multi level approach is used. prepareN is processed before prepareN-1.
1183 # archprepare is used in arch Makefiles and w    951 # archprepare is used in arch Makefiles and when processed asm symlink,
1184 # version.h and scripts_basic is processed /     952 # version.h and scripts_basic is processed / created.
1185                                                  953 
1186 PHONY += prepare archprepare                  !! 954 # Listed in dependency order
                                                   >> 955 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
                                                   >> 956 
                                                   >> 957 # prepare3 is used to check if we are building in a separate output directory,
                                                   >> 958 # and if so do:
                                                   >> 959 # 1) Check that make has not been executed in the kernel src $(srctree)
                                                   >> 960 # 2) Create the include2 directory, used for the second asm symlink
                                                   >> 961 prepare3: include/config/kernel.release
                                                   >> 962 ifneq ($(KBUILD_SRC),)
                                                   >> 963         @$(kecho) '  Using $(srctree) as source for kernel'
                                                   >> 964         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
                                                   >> 965                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
                                                   >> 966                 echo "  in the '$(srctree)' directory.";\
                                                   >> 967                 /bin/false; \
                                                   >> 968         fi;
                                                   >> 969         $(Q)if [ ! -d include2 ]; then                                  \
                                                   >> 970             mkdir -p include2;                                          \
                                                   >> 971             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
                                                   >> 972         fi
                                                   >> 973 endif
                                                   >> 974 
                                                   >> 975 # prepare2 creates a makefile if using a separate output directory
                                                   >> 976 prepare2: prepare3 outputmakefile
1187                                                  977 
1188 archprepare: outputmakefile archheaders archs !! 978 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
1189         asm-generic $(version_h) include/gene !! 979                    include/asm include/config/auto.conf
1190         include/generated/compile.h include/g !! 980         $(cmd_crmodverdir)
1191                                               !! 981 
1192 prepare0: archprepare                         !! 982 archprepare: prepare1 scripts_basic
1193         $(Q)$(MAKE) $(build)=scripts/mod      !! 983 
1194         $(Q)$(MAKE) $(build)=. prepare        !! 984 prepare0: archprepare FORCE
                                                   >> 985         $(Q)$(MAKE) $(build)=.
                                                   >> 986         $(Q)$(MAKE) $(build)=. missing-syscalls
1195                                                  987 
1196 # All the preparing..                            988 # All the preparing..
1197 prepare: prepare0                                989 prepare: prepare0
1198 ifdef CONFIG_RUST                             !! 990 
1199         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip !! 991 # The asm symlink changes when $(ARCH) changes.
1200         $(Q)$(MAKE) $(build)=rust             !! 992 # Detect this and ask user to run make mrproper
1201 endif                                         !! 993 # If asm is a stale symlink (point to dir that does not exist) remove it
1202                                               !! 994 define check-symlink
1203 PHONY += remove-stale-files                   !! 995         set -e;                                                            \
1204 remove-stale-files:                           !! 996         if [ -L include/asm ]; then                                        \
1205         $(Q)$(srctree)/scripts/remove-stale-f !! 997                 asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
1206                                               !! 998                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
1207 # Support for using generic headers in asm-ge !! 999                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
1208 asm-generic := -f $(srctree)/scripts/Makefile !! 1000                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
1209                                               !! 1001                         exit 1;                                            \
1210 PHONY += asm-generic uapi-asm-generic         !! 1002                 fi;                                                        \
1211 asm-generic: uapi-asm-generic                 !! 1003                 test -e $$asmlink || rm include/asm;                       \
1212         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1004         elif [ -d include/asm ]; then                                      \
1213         generic=include/asm-generic           !! 1005                 echo "ERROR: $@ is a directory but a symlink was expected";\
1214 uapi-asm-generic:                             !! 1006                 exit 1;                                                    \
1215         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC !! 1007         fi
1216         generic=include/uapi/asm-generic      !! 1008 endef
                                                   >> 1009 
                                                   >> 1010 # We create the target directory of the symlink if it does
                                                   >> 1011 # not exist so the test in check-symlink works and we have a
                                                   >> 1012 # directory for generated filesas used by some architectures.
                                                   >> 1013 define create-symlink
                                                   >> 1014         if [ ! -L include/asm ]; then                                      \
                                                   >> 1015                         $(kecho) '  SYMLINK $@ -> include/asm-$(SRCARCH)'; \
                                                   >> 1016                         if [ ! -d include/asm-$(SRCARCH) ]; then           \
                                                   >> 1017                                 mkdir -p include/asm-$(SRCARCH);           \
                                                   >> 1018                         fi;                                                \
                                                   >> 1019                         ln -fsn asm-$(SRCARCH) $@;                         \
                                                   >> 1020         fi
                                                   >> 1021 endef
                                                   >> 1022 
                                                   >> 1023 include/asm: FORCE
                                                   >> 1024         $(Q)$(check-symlink)
                                                   >> 1025         $(Q)$(create-symlink)
1217                                                  1026 
1218 # Generate some files                            1027 # Generate some files
1219 # -------------------------------------------    1028 # ---------------------------------------------------------------------------
1220                                                  1029 
1221 # KERNELRELEASE can change from a few differe    1030 # KERNELRELEASE can change from a few different places, meaning version.h
1222 # needs to be updated, so this check is force    1031 # needs to be updated, so this check is forced on all builds
1223                                                  1032 
1224 uts_len := 64                                    1033 uts_len := 64
1225 define filechk_utsrelease.h                      1034 define filechk_utsrelease.h
1226         if [ `echo -n "$(KERNELRELEASE)" | wc    1035         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1227           echo '"$(KERNELRELEASE)" exceeds $(    1036           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1228           exit 1;                                1037           exit 1;                                                         \
1229         fi;                                      1038         fi;                                                               \
1230         echo \#define UTS_RELEASE \"$(KERNELR !! 1039         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1231 endef                                            1040 endef
1232                                                  1041 
1233 define filechk_version.h                         1042 define filechk_version.h
1234         if [ $(SUBLEVEL) -gt 255 ]; then      !! 1043         (echo \#define LINUX_VERSION_CODE $(shell                             \
1235                 echo \#define LINUX_VERSION_C !! 1044         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1236                 expr $(VERSION) \* 65536 + $( !! 1045         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1237         else                                  << 
1238                 echo \#define LINUX_VERSION_C << 
1239                 expr $(VERSION) \* 65536 + $( << 
1240         fi;                                   << 
1241         echo '#define KERNEL_VERSION(a,b,c) ( << 
1242         ((c) > 255 ? 255 : (c)))';            << 
1243         echo \#define LINUX_VERSION_MAJOR $(V << 
1244         echo \#define LINUX_VERSION_PATCHLEVE << 
1245         echo \#define LINUX_VERSION_SUBLEVEL  << 
1246 endef                                            1046 endef
1247                                                  1047 
1248 $(version_h): private PATCHLEVEL := $(or $(PA !! 1048 include/linux/version.h: $(srctree)/Makefile FORCE
1249 $(version_h): private SUBLEVEL := $(or $(SUBL << 
1250 $(version_h): FORCE                           << 
1251         $(call filechk,version.h)                1049         $(call filechk,version.h)
1252                                                  1050 
1253 include/generated/utsrelease.h: include/confi !! 1051 include/linux/utsrelease.h: include/config/kernel.release FORCE
1254         $(call filechk,utsrelease.h)             1052         $(call filechk,utsrelease.h)
1255                                                  1053 
1256 filechk_compile.h = $(srctree)/scripts/mkcomp << 
1257         "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION << 
1258                                               << 
1259 include/generated/compile.h: FORCE            << 
1260         $(call filechk,compile.h)             << 
1261                                               << 
1262 PHONY += headerdep                               1054 PHONY += headerdep
1263 headerdep:                                       1055 headerdep:
1264         $(Q)find $(srctree)/include/ -name '* !! 1056         $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1265         $(srctree)/scripts/headerdep.pl -I$(s << 
1266                                                  1057 
1267 # -------------------------------------------    1058 # ---------------------------------------------------------------------------
1268 # Kernel headers                              << 
1269                                                  1059 
1270 #Default location for installed headers       !! 1060 PHONY += depend dep
1271 export INSTALL_HDR_PATH = $(objtree)/usr      !! 1061 depend dep:
1272                                               !! 1062         @echo '*** Warning: make $@ is unnecessary now.'
1273 quiet_cmd_headers_install = INSTALL $(INSTALL << 
1274       cmd_headers_install = \                 << 
1275         mkdir -p $(INSTALL_HDR_PATH); \       << 
1276         rsync -mrl --include='*/' --include=' << 
1277         usr/include $(INSTALL_HDR_PATH)       << 
1278                                               << 
1279 PHONY += headers_install                      << 
1280 headers_install: headers                      << 
1281         $(call cmd,headers_install)           << 
1282                                               << 
1283 PHONY += archheaders archscripts              << 
1284                                               << 
1285 hdr-inst := -f $(srctree)/scripts/Makefile.he << 
1286                                               << 
1287 PHONY += headers                              << 
1288 headers: $(version_h) scripts_unifdef uapi-as << 
1289         $(if $(filter um, $(SRCARCH)), $(erro << 
1290         $(Q)$(MAKE) $(hdr-inst)=include/uapi  << 
1291         $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARC << 
1292                                               << 
1293 ifdef CONFIG_HEADERS_INSTALL                  << 
1294 prepare: headers                              << 
1295 endif                                         << 
1296                                               << 
1297 PHONY += scripts_unifdef                      << 
1298 scripts_unifdef: scripts_basic                << 
1299         $(Q)$(MAKE) $(build)=scripts scripts/ << 
1300                                               << 
1301 # ------------------------------------------- << 
1302 # Install                                     << 
1303                                               << 
1304 # Many distributions have the custom install  << 
1305 # If DKMS is installed, 'make install' will e << 
1306 # to this Makefile to build and install exter << 
1307 # Cancel sub_make_done so that options such a << 
1308                                               << 
1309 quiet_cmd_install = INSTALL $(INSTALL_PATH)   << 
1310       cmd_install = unset sub_make_done; $(sr << 
1311                                               << 
1312 # ------------------------------------------- << 
1313 # vDSO install                                << 
1314                                               << 
1315 PHONY += vdso_install                         << 
1316 vdso_install: export INSTALL_FILES = $(vdso-i << 
1317 vdso_install:                                 << 
1318         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1319                                                  1063 
1320 # -------------------------------------------    1064 # ---------------------------------------------------------------------------
1321 # Tools                                       !! 1065 # Firmware install
                                                   >> 1066 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
                                                   >> 1067 export INSTALL_FW_PATH
1322                                                  1068 
1323 ifdef CONFIG_OBJTOOL                          !! 1069 PHONY += firmware_install
1324 prepare: tools/objtool                        !! 1070 firmware_install: FORCE
1325 endif                                         !! 1071         @mkdir -p $(objtree)/firmware
1326                                               !! 1072         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1327 ifdef CONFIG_BPF                              << 
1328 ifdef CONFIG_DEBUG_INFO_BTF                   << 
1329 prepare: tools/bpf/resolve_btfids             << 
1330 endif                                         << 
1331 endif                                         << 
1332                                               << 
1333 # The tools build system is not a part of Kbu << 
1334 # its own unique issues. If you need to integ << 
1335 # please consider locating that tool outside  << 
1336 # standard Kbuild "hostprogs" syntax instead  << 
1337 # here. See Documentation/kbuild/makefiles.rs << 
1338                                               << 
1339 PHONY += resolve_btfids_clean                 << 
1340                                               << 
1341 resolve_btfids_O = $(abspath $(objtree))/tool << 
1342                                               << 
1343 # tools/bpf/resolve_btfids directory might no << 
1344 # in output directory, skip its clean in that << 
1345 resolve_btfids_clean:                         << 
1346 ifneq ($(wildcard $(resolve_btfids_O)),)      << 
1347         $(Q)$(MAKE) -sC $(srctree)/tools/bpf/ << 
1348 endif                                         << 
1349                                               << 
1350 # Clear a bunch of variables before executing << 
1351 ifeq ($(quiet),silent_)                       << 
1352 tools_silent=s                                << 
1353 endif                                         << 
1354                                               << 
1355 tools/: FORCE                                 << 
1356         $(Q)mkdir -p $(objtree)/tools         << 
1357         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1358                                               << 
1359 tools/%: FORCE                                << 
1360         $(Q)mkdir -p $(objtree)/tools         << 
1361         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(too << 
1362                                                  1073 
1363 # -------------------------------------------    1074 # ---------------------------------------------------------------------------
1364 # Kernel selftest                             !! 1075 # Kernel headers
1365                                               << 
1366 PHONY += kselftest                            << 
1367 kselftest: headers                            << 
1368         $(Q)$(MAKE) -C $(srctree)/tools/testi << 
1369                                               << 
1370 kselftest-%: headers FORCE                    << 
1371         $(Q)$(MAKE) -C $(srctree)/tools/testi << 
1372                                               << 
1373 PHONY += kselftest-merge                      << 
1374 kselftest-merge:                              << 
1375         $(if $(wildcard $(objtree)/.config),, << 
1376         $(Q)find $(srctree)/tools/testing/sel << 
1377                 xargs $(srctree)/scripts/kcon << 
1378         $(Q)$(MAKE) -f $(srctree)/Makefile ol << 
1379                                               << 
1380 # ------------------------------------------- << 
1381 # Devicetree files                            << 
1382                                               << 
1383 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/ << 
1384 dtstree := arch/$(SRCARCH)/boot/dts           << 
1385 endif                                         << 
1386                                               << 
1387 ifneq ($(dtstree),)                           << 
1388                                               << 
1389 %.dtb: dtbs_prepare                           << 
1390         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1391                                               << 
1392 %.dtbo: dtbs_prepare                          << 
1393         $(Q)$(MAKE) $(build)=$(dtstree) $(dts << 
1394                                               << 
1395 PHONY += dtbs dtbs_prepare dtbs_install dtbs_ << 
1396 dtbs: dtbs_prepare                            << 
1397         $(Q)$(MAKE) $(build)=$(dtstree) need- << 
1398                                               << 
1399 # include/config/kernel.release is actually n << 
1400 # INSTALL_DTBS_PATH contains $(KERNELRELEASE) << 
1401 # dtbs_install depend on it as dtbs_install m << 
1402 dtbs_prepare: include/config/kernel.release s << 
1403                                               << 
1404 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)), << 
1405 export CHECK_DTBS=y                           << 
1406 endif                                         << 
1407                                               << 
1408 ifneq ($(CHECK_DTBS),)                        << 
1409 dtbs_prepare: dt_binding_schemas              << 
1410 endif                                         << 
1411                                               << 
1412 dtbs_check: dtbs                              << 
1413                                               << 
1414 dtbs_install:                                 << 
1415         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1416                                               << 
1417 ifdef CONFIG_OF_EARLY_FLATTREE                << 
1418 all: dtbs                                     << 
1419 endif                                         << 
1420                                                  1076 
1421 endif                                         !! 1077 #Default location for installed headers
                                                   >> 1078 export INSTALL_HDR_PATH = $(objtree)/usr
1422                                                  1079 
1423 PHONY += scripts_dtc                          !! 1080 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1424 scripts_dtc: scripts_basic                    !! 1081 # Find out where the Kbuild file is located to support
1425         $(Q)$(MAKE) $(build)=scripts/dtc      !! 1082 # arch/$(ARCH)/include/asm
                                                   >> 1083 hdr-dir = $(strip                                                         \
                                                   >> 1084           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
                                                   >> 1085                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1426                                                  1086 
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO !! 1087 # If we do an all arch process set dst to asm-$(hdr-arch)
1428 export CHECK_DTBS=y                           !! 1088 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1429 endif                                         << 
1430                                                  1089 
1431 PHONY += dt_binding_check dt_binding_schemas  !! 1090 PHONY += __headers
1432 dt_binding_check: dt_binding_schemas scripts_ !! 1091 __headers: include/linux/version.h scripts_basic FORCE
1433         $(Q)$(MAKE) $(build)=Documentation/de !! 1092         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1434                                                  1093 
1435 dt_binding_schemas:                           !! 1094 PHONY += headers_install_all
1436         $(Q)$(MAKE) $(build)=Documentation/de !! 1095 headers_install_all:
                                                   >> 1096         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1437                                                  1097 
1438 PHONY += dt_compatible_check                  !! 1098 PHONY += headers_install
1439 dt_compatible_check: dt_binding_schemas       !! 1099 headers_install: __headers
1440         $(Q)$(MAKE) $(build)=Documentation/de !! 1100         $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
                                                   >> 1101         $(error Headers not exportable for the $(SRCARCH) architecture))
                                                   >> 1102         $(Q)$(MAKE) $(hdr-inst)=include
                                                   >> 1103         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
                                                   >> 1104 
                                                   >> 1105 PHONY += headers_check_all
                                                   >> 1106 headers_check_all: headers_install_all
                                                   >> 1107         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
                                                   >> 1108 
                                                   >> 1109 PHONY += headers_check
                                                   >> 1110 headers_check: headers_install
                                                   >> 1111         $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
                                                   >> 1112         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1441                                                  1113 
1442 # -------------------------------------------    1114 # ---------------------------------------------------------------------------
1443 # Modules                                        1115 # Modules
1444                                                  1116 
1445 ifdef CONFIG_MODULES                             1117 ifdef CONFIG_MODULES
1446                                                  1118 
1447 # By default, build modules as well              1119 # By default, build modules as well
1448                                                  1120 
1449 all: modules                                     1121 all: modules
1450                                                  1122 
1451 # When we're building modules with modversion !! 1123 #       Build modules
1452 # the built-in objects during the descend as  << 
1453 # make sure the checksums are up to date befo << 
1454 ifdef CONFIG_MODVERSIONS                      << 
1455   KBUILD_BUILTIN := 1                         << 
1456 endif                                         << 
1457                                               << 
1458 # Build modules                               << 
1459 #                                                1124 #
                                                   >> 1125 #       A module can be listed more than once in obj-m resulting in
                                                   >> 1126 #       duplicate lines in modules.order files.  Those are removed
                                                   >> 1127 #       using awk while concatenating to the final file.
                                                   >> 1128 
                                                   >> 1129 PHONY += modules
                                                   >> 1130 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
                                                   >> 1131         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
                                                   >> 1132         @$(kecho) '  Building modules, stage 2.';
                                                   >> 1133         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
                                                   >> 1134         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1460                                                  1135 
1461 # *.ko are usually independent of vmlinux, bu << 
1462 # is an exception.                            << 
1463 ifdef CONFIG_DEBUG_INFO_BTF_MODULES           << 
1464 KBUILD_BUILTIN := 1                           << 
1465 modules: vmlinux                              << 
1466 endif                                         << 
1467                                               << 
1468 modules: modules_prepare                      << 
1469                                                  1136 
1470 # Target to prepare building external modules    1137 # Target to prepare building external modules
1471 modules_prepare: prepare                      !! 1138 PHONY += modules_prepare
1472         $(Q)$(MAKE) $(build)=scripts scripts/ !! 1139 modules_prepare: prepare scripts
                                                   >> 1140 
                                                   >> 1141 # Target to install modules
                                                   >> 1142 PHONY += modules_install
                                                   >> 1143 modules_install: _modinst_ _modinst_post
                                                   >> 1144 
                                                   >> 1145 PHONY += _modinst_
                                                   >> 1146 _modinst_:
                                                   >> 1147         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
                                                   >> 1148                 echo "Warning: you may need to install module-init-tools"; \
                                                   >> 1149                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
                                                   >> 1150                 sleep 1; \
                                                   >> 1151         fi
                                                   >> 1152         @rm -rf $(MODLIB)/kernel
                                                   >> 1153         @rm -f $(MODLIB)/source
                                                   >> 1154         @mkdir -p $(MODLIB)/kernel
                                                   >> 1155         @ln -s $(srctree) $(MODLIB)/source
                                                   >> 1156         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                                                   >> 1157                 rm -f $(MODLIB)/build ; \
                                                   >> 1158                 ln -s $(objtree) $(MODLIB)/build ; \
                                                   >> 1159         fi
                                                   >> 1160         @cp -f $(objtree)/modules.order $(MODLIB)/
                                                   >> 1161         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1162 
                                                   >> 1163 # This depmod is only for convenience to give the initial
                                                   >> 1164 # boot a modules.dep even before / is mounted read-write.  However the
                                                   >> 1165 # boot script depmod is the master version.
                                                   >> 1166 PHONY += _modinst_post
                                                   >> 1167 _modinst_post: _modinst_
                                                   >> 1168         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
                                                   >> 1169         $(call cmd,depmod)
                                                   >> 1170 
                                                   >> 1171 else # CONFIG_MODULES
                                                   >> 1172 
                                                   >> 1173 # Modules not configured
                                                   >> 1174 # ---------------------------------------------------------------------------
                                                   >> 1175 
                                                   >> 1176 modules modules_install: FORCE
                                                   >> 1177         @echo
                                                   >> 1178         @echo "The present kernel configuration has modules disabled."
                                                   >> 1179         @echo "Type 'make config' and enable loadable module support."
                                                   >> 1180         @echo "Then build a kernel with module support enabled."
                                                   >> 1181         @echo
                                                   >> 1182         @exit 1
1473                                                  1183 
1474 endif # CONFIG_MODULES                           1184 endif # CONFIG_MODULES
1475                                                  1185 
1476 ###                                              1186 ###
1477 # Cleaning is done on three levels.              1187 # Cleaning is done on three levels.
1478 # make clean     Delete most generated files     1188 # make clean     Delete most generated files
1479 #                Leave enough to build extern    1189 #                Leave enough to build external modules
1480 # make mrproper  Delete the current configura    1190 # make mrproper  Delete the current configuration, and all generated files
1481 # make distclean Remove editor backup files,     1191 # make distclean Remove editor backup files, patch leftover files and the like
1482                                                  1192 
1483 # Directories & files removed with 'make clea    1193 # Directories & files removed with 'make clean'
1484 CLEAN_FILES += vmlinux.symvers modules-only.s !! 1194 CLEAN_DIRS  += $(MODVERDIR)
1485                modules.builtin modules.builti !! 1195 CLEAN_FILES +=  vmlinux System.map \
1486                compile_commands.json rust/tes !! 1196                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1487                rust-project.json .vmlinux.obj << 
1488                                                  1197 
1489 # Directories & files removed with 'make mrpr    1198 # Directories & files removed with 'make mrproper'
1490 MRPROPER_FILES += include/config include/gene !! 1199 MRPROPER_DIRS  += include/config include2 usr/include include/generated
1491                   arch/$(SRCARCH)/include/gen !! 1200 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1492                   debian snap tar-install PKG !! 1201                   include/linux/autoconf.h include/linux/version.h      \
1493                   .config .config.old .versio !! 1202                   include/linux/utsrelease.h                            \
1494                   Module.symvers \            !! 1203                   include/linux/bounds.h include/asm*/asm-offsets.h     \
1495                   certs/signing_key.pem \     !! 1204                   Module.symvers Module.markers tags TAGS cscope*
1496                   certs/x509.genkey \         << 
1497                   vmlinux-gdb.py \            << 
1498                   rpmbuild \                  << 
1499                   rust/libmacros.so           << 
1500                                                  1205 
1501 # clean - Delete most, but leave enough to bu    1206 # clean - Delete most, but leave enough to build external modules
1502 #                                                1207 #
1503 clean: private rm-files := $(CLEAN_FILES)     !! 1208 clean: rm-dirs  := $(CLEAN_DIRS)
1504                                               !! 1209 clean: rm-files := $(CLEAN_FILES)
1505 PHONY += archclean vmlinuxclean               !! 1210 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1506                                                  1211 
1507 vmlinuxclean:                                 !! 1212 PHONY += $(clean-dirs) clean archclean
1508         $(Q)$(CONFIG_SHELL) $(srctree)/script !! 1213 $(clean-dirs):
1509         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f !! 1214         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1510                                                  1215 
1511 clean: archclean vmlinuxclean resolve_btfids_ !! 1216 clean: archclean $(clean-dirs)
                                                   >> 1217         $(call cmd,rmdirs)
                                                   >> 1218         $(call cmd,rmfiles)
                                                   >> 1219         @find . $(RCS_FIND_IGNORE) \
                                                   >> 1220                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
                                                   >> 1221                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
                                                   >> 1222                 -o -name '*.symtypes' -o -name 'modules.order' \
                                                   >> 1223                 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
                                                   >> 1224                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1512                                                  1225 
1513 # mrproper - Delete all generated files, incl    1226 # mrproper - Delete all generated files, including .config
1514 #                                                1227 #
1515 mrproper: private rm-files := $(MRPROPER_FILE !! 1228 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1516 mrproper-dirs      := $(addprefix _mrproper_, !! 1229 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
                                                   >> 1230 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1517                                                  1231 
1518 PHONY += $(mrproper-dirs) mrproper            !! 1232 PHONY += $(mrproper-dirs) mrproper archmrproper
1519 $(mrproper-dirs):                                1233 $(mrproper-dirs):
1520         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    1234         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1521                                                  1235 
1522 mrproper: clean $(mrproper-dirs)              !! 1236 mrproper: clean archmrproper $(mrproper-dirs)
                                                   >> 1237         $(call cmd,rmdirs)
1523         $(call cmd,rmfiles)                      1238         $(call cmd,rmfiles)
1524         @find . $(RCS_FIND_IGNORE) \          << 
1525                 \( -name '*.rmeta' \) \       << 
1526                 -type f -print | xargs rm -f  << 
1527                                                  1239 
1528 # distclean                                      1240 # distclean
1529 #                                                1241 #
1530 PHONY += distclean                               1242 PHONY += distclean
1531                                                  1243 
1532 distclean: mrproper                              1244 distclean: mrproper
1533         @find . $(RCS_FIND_IGNORE) \          !! 1245         @find $(srctree) $(RCS_FIND_IGNORE) \
1534                 \( -name '*.orig' -o -name '*    1246                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1535                 -o -name '*.bak' -o -name '#* !! 1247                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1536                 -o -name 'core' -o -name tags !! 1248                 -o -name '.*.rej' -o -size 0 \
1537                 -o -name GPATH -o -name GRTAG !! 1249                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1538                 -type f -print | xargs rm -f     1250                 -type f -print | xargs rm -f
1539                                                  1251 
1540                                                  1252 
1541 # Packaging of the kernel to various formats     1253 # Packaging of the kernel to various formats
1542 # -------------------------------------------    1254 # ---------------------------------------------------------------------------
                                                   >> 1255 # rpm target kept for backward compatibility
                                                   >> 1256 package-dir     := $(srctree)/scripts/package
1543                                                  1257 
1544 %src-pkg: FORCE                               << 
1545         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1546 %pkg: include/config/kernel.release FORCE        1258 %pkg: include/config/kernel.release FORCE
1547         $(Q)$(MAKE) -f $(srctree)/scripts/Mak !! 1259         $(Q)$(MAKE) $(build)=$(package-dir) $@
                                                   >> 1260 rpm: include/config/kernel.release FORCE
                                                   >> 1261         $(Q)$(MAKE) $(build)=$(package-dir) $@
                                                   >> 1262 
1548                                                  1263 
1549 # Brief documentation of the typical targets     1264 # Brief documentation of the typical targets used
1550 # -------------------------------------------    1265 # ---------------------------------------------------------------------------
1551                                                  1266 
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC    1267 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1553 boards := $(sort $(notdir $(boards)))         !! 1268 boards := $(notdir $(boards))
1554 board-dirs := $(dir $(wildcard $(srctree)/arc    1269 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1555 board-dirs := $(sort $(notdir $(board-dirs:/=    1270 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1556                                                  1271 
1557 PHONY += help                                 << 
1558 help:                                            1272 help:
1559         @echo  'Cleaning targets:'               1273         @echo  'Cleaning targets:'
1560         @echo  '  clean           - Remove mo    1274         @echo  '  clean           - Remove most generated files but keep the config and'
1561         @echo  '                    enough bu    1275         @echo  '                    enough build support to build external modules'
1562         @echo  '  mrproper        - Remove al    1276         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1563         @echo  '  distclean       - mrproper     1277         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1564         @echo  ''                                1278         @echo  ''
                                                   >> 1279         @echo  'Configuration targets:'
1565         @$(MAKE) -f $(srctree)/scripts/kconfi    1280         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1566         @echo  ''                                1281         @echo  ''
1567         @echo  'Other generic targets:'          1282         @echo  'Other generic targets:'
1568         @echo  '  all             - Build all    1283         @echo  '  all             - Build all targets marked with [*]'
1569         @echo  '* vmlinux         - Build the    1284         @echo  '* vmlinux         - Build the bare kernel'
1570         @echo  '* modules         - Build all    1285         @echo  '* modules         - Build all modules'
1571         @echo  '  modules_install - Install a    1286         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1572         @echo  '  vdso_install    - Install u !! 1287         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
                                                   >> 1288         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1573         @echo  '  dir/            - Build all    1289         @echo  '  dir/            - Build all files in dir and below'
1574         @echo  '  dir/file.[ois]  - Build spe    1290         @echo  '  dir/file.[ois]  - Build specified target only'
1575         @echo  '  dir/file.ll     - Build the << 
1576         @echo  '                    (requires << 
1577         @echo  '  dir/file.lst    - Build spe << 
1578         @echo  '                    (requires << 
1579         @echo  '  dir/file.ko     - Build mod    1291         @echo  '  dir/file.ko     - Build module including final link'
1580         @echo  '  modules_prepare - Set up fo    1292         @echo  '  modules_prepare - Set up for building external modules'
1581         @echo  '  tags/TAGS       - Generate     1293         @echo  '  tags/TAGS       - Generate tags file for editors'
1582         @echo  '  cscope          - Generate     1294         @echo  '  cscope          - Generate cscope index'
1583         @echo  '  gtags           - Generate  !! 1295         @echo  '  kernelrelease   - Output the release version string'
1584         @echo  '  kernelrelease   - Output th !! 1296         @echo  '  kernelversion   - Output the version stored in Makefile'
1585         @echo  '  kernelversion   - Output th << 
1586         @echo  '  image_name      - Output th << 
1587         @echo  '  headers_install - Install s    1297         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1588          echo  '                    (default:    1298          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1589          echo  ''                                1299          echo  ''
1590         @echo  'Static analysers:'            !! 1300         @echo  'Static analysers'
1591         @echo  '  checkstack      - Generate  !! 1301         @echo  '  checkstack      - Generate a list of stack hogs'
1592         @echo  '                    with a st !! 1302         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1593         @echo  '  versioncheck    - Sanity ch    1303         @echo  '  versioncheck    - Sanity check on version.h usage'
1594         @echo  '  includecheck    - Check for    1304         @echo  '  includecheck    - Check for duplicate included header files'
1595         @echo  '  export_report   - List the     1305         @echo  '  export_report   - List the usages of all exported symbols'
1596         @echo  '  headerdep       - Detect in !! 1306         @echo  '  headers_check   - Sanity check on exported headers'
1597         @echo  '  coccicheck      - Check wit !! 1307         @echo  '  headerdep       - Detect inclusion cycles in headers'; \
1598         @echo  '  clang-analyzer  - Check wit !! 1308          echo  ''
1599         @echo  '  clang-tidy      - Check wit << 
1600         @echo  ''                             << 
1601         @echo  'Tools:'                       << 
1602         @echo  '  nsdeps          - Generate  << 
1603         @echo  ''                             << 
1604         @echo  'Kernel selftest:'             << 
1605         @echo  '  kselftest         - Build a << 
1606         @echo  '                      Build,  << 
1607         @echo  '                      running << 
1608         @echo  '                      Run as  << 
1609         @echo  '  kselftest-all     - Build k << 
1610         @echo  '  kselftest-install - Build a << 
1611         @echo  '  kselftest-clean   - Remove  << 
1612         @echo  '  kselftest-merge   - Merge a << 
1613         @echo  '                      kselfte << 
1614         @echo  ''                             << 
1615         @echo  'Rust targets:'                << 
1616         @echo  '  rustavailable   - Checks wh << 
1617         @echo  '                    available << 
1618         @echo  '  rustfmt         - Reformat  << 
1619         @echo  '  rustfmtcheck    - Checks if << 
1620         @echo  '                    is format << 
1621         @echo  '  rustdoc         - Generate  << 
1622         @echo  '                    (requires << 
1623         @echo  '  rusttest        - Runs the  << 
1624         @echo  '                    (requires << 
1625         @echo  '  rust-analyzer   - Generate  << 
1626         @echo  '                    (requires << 
1627         @echo  '  dir/file.[os]   - Build spe << 
1628         @echo  '  dir/file.rsi    - Build mac << 
1629         @echo  '                    Run with  << 
1630         @echo  '                    The outpu << 
1631         @echo  '  dir/file.ll     - Build the << 
1632         @echo  ''                             << 
1633         @$(if $(dtstree), \                   << 
1634                 echo 'Devicetree:'; \         << 
1635                 echo '* dtbs               -  << 
1636                 echo '  dtbs_install       -  << 
1637                 echo '  dt_binding_check   -  << 
1638                 echo '  dt_binding_schema  -  << 
1639                 echo '  dtbs_check         -  << 
1640                 echo '')                      << 
1641                                               << 
1642         @echo 'Userspace tools targets:'      << 
1643         @echo '  use "make tools/help"'       << 
1644         @echo '  or  "cd tools; make help"'   << 
1645         @echo  ''                             << 
1646         @echo  'Kernel packaging:'               1309         @echo  'Kernel packaging:'
1647         @$(MAKE) -f $(srctree)/scripts/Makefi !! 1310         @$(MAKE) $(build)=$(package-dir) help
1648         @echo  ''                                1311         @echo  ''
1649         @echo  'Documentation targets:'          1312         @echo  'Documentation targets:'
1650         @$(MAKE) -f $(srctree)/Documentation/ !! 1313         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1651         @echo  ''                                1314         @echo  ''
1652         @echo  'Architecture-specific targets !! 1315         @echo  'Architecture specific targets ($(SRCARCH)):'
1653         @$(or $(archhelp),\                   !! 1316         @$(if $(archhelp),$(archhelp),\
1654                 echo '  No architecture-speci !! 1317                 echo '  No architecture specific help defined for $(SRCARCH)')
1655         @echo  ''                                1318         @echo  ''
1656         @$(if $(boards), \                       1319         @$(if $(boards), \
1657                 $(foreach b, $(boards), \        1320                 $(foreach b, $(boards), \
1658                 printf "  %-27s - Build for % !! 1321                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1659                 echo '')                         1322                 echo '')
1660         @$(if $(board-dirs), \                   1323         @$(if $(board-dirs), \
1661                 $(foreach b, $(board-dirs), \    1324                 $(foreach b, $(board-dirs), \
1662                 printf "  %-16s - Show %s-spe    1325                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1663                 printf "  %-16s - Show all of    1326                 printf "  %-16s - Show all of the above\\n" help-boards; \
1664                 echo '')                         1327                 echo '')
1665                                                  1328 
1666         @echo  '  make V=n   [targets] 1: ver !! 1329         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1667         @echo  '                       2: giv !! 1330         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1668         @echo  '                       V=1 an << 
1669         @echo  '  make O=dir [targets] Locate    1331         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1670         @echo  '  make C=1   [targets] Check  !! 1332         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1671         @echo  '                       (spars << 
1672         @echo  '  make C=2   [targets] Force     1333         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1673         @echo  '  make RECORDMCOUNT_WARN=1 [t << 
1674         @echo  '  make W=n   [targets] Enable << 
1675         @echo  '                1: warnings w << 
1676         @echo  '                2: warnings w << 
1677         @echo  '                3: more obscu << 
1678         @echo  '                c: extra chec << 
1679         @echo  '                e: warnings a << 
1680         @echo  '                Multiple leve << 
1681         @$(if $(dtstree), \                   << 
1682                 echo '  make CHECK_DTBS=1 [ta << 
1683                 echo '         This can be ap << 
1684                 )                             << 
1685         @echo  ''                                1334         @echo  ''
1686         @echo  'Execute "make" or "make all"     1335         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1687         @echo  'For further info see the ./RE    1336         @echo  'For further info see the ./README file'
1688                                                  1337 
1689                                                  1338 
1690 help-board-dirs := $(addprefix help-,$(board-    1339 help-board-dirs := $(addprefix help-,$(board-dirs))
1691                                                  1340 
1692 help-boards: $(help-board-dirs)                  1341 help-boards: $(help-board-dirs)
1693                                                  1342 
1694 boards-per-dir = $(sort $(notdir $(wildcard $ !! 1343 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1695                                                  1344 
1696 $(help-board-dirs): help-%:                      1345 $(help-board-dirs): help-%:
1697         @echo  'Architecture-specific targets !! 1346         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1698         @$(if $(boards-per-dir), \               1347         @$(if $(boards-per-dir), \
1699                 $(foreach b, $(boards-per-dir    1348                 $(foreach b, $(boards-per-dir), \
1700                 printf "  %-24s - Build for %    1349                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1701                 echo '')                         1350                 echo '')
1702                                                  1351 
1703                                                  1352 
1704 # Documentation targets                          1353 # Documentation targets
1705 # -------------------------------------------    1354 # ---------------------------------------------------------------------------
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html !! 1355 %docs: scripts_basic FORCE
1707                linkcheckdocs dochelp refcheck !! 1356         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1708 PHONY += $(DOC_TARGETS)                       << 
1709 $(DOC_TARGETS):                               << 
1710         $(Q)$(MAKE) $(build)=Documentation $@ << 
1711                                               << 
1712                                               << 
1713 # Rust targets                                << 
1714 # ------------------------------------------- << 
1715                                               << 
1716 # "Is Rust available?" target                 << 
1717 PHONY += rustavailable                        << 
1718 rustavailable:                                << 
1719         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1720                                               << 
1721 # Documentation target                        << 
1722 #                                             << 
1723 # Using the singular to avoid running afoul o << 
1724 PHONY += rustdoc                              << 
1725 rustdoc: prepare                              << 
1726         $(Q)$(MAKE) $(build)=rust $@          << 
1727                                               << 
1728 # Testing target                              << 
1729 PHONY += rusttest                             << 
1730 rusttest: prepare                             << 
1731         $(Q)$(MAKE) $(build)=rust $@          << 
1732                                               << 
1733 # Formatting targets                          << 
1734 PHONY += rustfmt rustfmtcheck                 << 
1735                                               << 
1736 # We skip `rust/alloc` since we want to minim << 
1737 #                                             << 
1738 # We match using absolute paths since `find`  << 
1739 # when matching, which is a problem when e.g. << 
1740 # We `grep` afterwards in order to remove the << 
1741 rustfmt:                                      << 
1742         $(Q)find $(abs_srctree) -type f -name << 
1743                 -o -path $(abs_srctree)/rust/ << 
1744                 -o -path $(abs_objtree)/rust/ << 
1745                 | grep -Fv $(abs_srctree)/rus << 
1746                 | grep -Fv $(abs_objtree)/rus << 
1747                 | grep -Fv generated \        << 
1748                 | xargs $(RUSTFMT) $(rustfmt_ << 
1749                                               << 
1750 rustfmtcheck: rustfmt_flags = --check         << 
1751 rustfmtcheck: rustfmt                         << 
1752                                               << 
1753 # Misc                                        << 
1754 # ------------------------------------------- << 
1755                                               << 
1756 PHONY += misc-check                           << 
1757 misc-check:                                   << 
1758         $(Q)$(srctree)/scripts/misc-check     << 
1759                                               << 
1760 all: misc-check                               << 
1761                                               << 
1762 PHONY += scripts_gdb                          << 
1763 scripts_gdb: prepare0                         << 
1764         $(Q)$(MAKE) $(build)=scripts/gdb      << 
1765         $(Q)ln -fsn $(abspath $(srctree)/scri << 
1766                                               << 
1767 ifdef CONFIG_GDB_SCRIPTS                      << 
1768 all: scripts_gdb                              << 
1769 endif                                         << 
1770                                                  1357 
1771 else # KBUILD_EXTMOD                             1358 else # KBUILD_EXTMOD
1772                                                  1359 
1773 filechk_kernel.release = echo $(KERNELRELEASE << 
1774                                               << 
1775 ###                                              1360 ###
1776 # External module support.                       1361 # External module support.
1777 # When building external modules the kernel u    1362 # When building external modules the kernel used as basis is considered
1778 # read-only, and no consistency checks are ma    1363 # read-only, and no consistency checks are made and the make
1779 # system is not used on the basis kernel. If     1364 # system is not used on the basis kernel. If updates are required
1780 # in the basis kernel ordinary make commands  !! 1365 # in the basis kernel ordinary make commands (without M=...) must
                                                   >> 1366 # be used.
                                                   >> 1367 #
                                                   >> 1368 # The following are the only valid targets when building external
                                                   >> 1369 # modules.
                                                   >> 1370 # make M=dir clean     Delete all automatically generated files
                                                   >> 1371 # make M=dir modules   Make all modules in specified dir
                                                   >> 1372 # make M=dir           Same as 'make M=dir modules'
                                                   >> 1373 # make M=dir modules_install
                                                   >> 1374 #                      Install the modules built in the module directory
                                                   >> 1375 #                      Assumes install directory is already created
1781                                                  1376 
1782 # We are always building only modules.        !! 1377 # We are always building modules
1783 KBUILD_BUILTIN :=                             << 
1784 KBUILD_MODULES := 1                              1378 KBUILD_MODULES := 1
                                                   >> 1379 PHONY += crmodverdir
                                                   >> 1380 crmodverdir:
                                                   >> 1381         $(cmd_crmodverdir)
                                                   >> 1382 
                                                   >> 1383 PHONY += $(objtree)/Module.symvers
                                                   >> 1384 $(objtree)/Module.symvers:
                                                   >> 1385         @test -e $(objtree)/Module.symvers || ( \
                                                   >> 1386         echo; \
                                                   >> 1387         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
                                                   >> 1388         echo "           is missing; modules will have no dependencies and modversions."; \
                                                   >> 1389         echo )
                                                   >> 1390 
                                                   >> 1391 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
                                                   >> 1392 PHONY += $(module-dirs) modules
                                                   >> 1393 $(module-dirs): crmodverdir $(objtree)/Module.symvers
                                                   >> 1394         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
                                                   >> 1395 
                                                   >> 1396 modules: $(module-dirs)
                                                   >> 1397         @$(kecho) '  Building modules, stage 2.';
                                                   >> 1398         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1785                                                  1399 
1786 build-dir := $(KBUILD_EXTMOD)                 !! 1400 PHONY += modules_install
                                                   >> 1401 modules_install: _emodinst_ _emodinst_post
1787                                                  1402 
1788 compile_commands.json: $(extmod_prefix)compil !! 1403 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1789 PHONY += compile_commands.json                !! 1404 PHONY += _emodinst_
                                                   >> 1405 _emodinst_:
                                                   >> 1406         $(Q)mkdir -p $(MODLIB)/$(install-dir)
                                                   >> 1407         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
                                                   >> 1408 
                                                   >> 1409 PHONY += _emodinst_post
                                                   >> 1410 _emodinst_post: _emodinst_
                                                   >> 1411         $(call cmd,depmod)
1790                                                  1412 
1791 clean-dirs := $(KBUILD_EXTMOD)                !! 1413 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M !! 1414 
1793         $(KBUILD_EXTMOD)/compile_commands.jso !! 1415 PHONY += $(clean-dirs) clean
1794                                               !! 1416 $(clean-dirs):
1795 PHONY += prepare                              !! 1417         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1796 # now expand this into a simple variable to r !! 1418 
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT !! 1419 clean:  rm-dirs := $(MODVERDIR)
1798 prepare:                                      !! 1420 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1799         @if [ "$(CC_VERSION_TEXT)" != "$(CONF !! 1421                    $(KBUILD_EXTMOD)/Module.markers \
1800                 echo >&2 "warning: the compil !! 1422                    $(KBUILD_EXTMOD)/modules.order
1801                 echo >&2 "  The kernel was bu !! 1423 clean: $(clean-dirs)
1802                 echo >&2 "  You are using:    !! 1424         $(call cmd,rmdirs)
1803         fi                                    !! 1425         $(call cmd,rmfiles)
                                                   >> 1426         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
                                                   >> 1427                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
                                                   >> 1428                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
                                                   >> 1429                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1804                                                  1430 
1805 PHONY += help                                 << 
1806 help:                                            1431 help:
1807         @echo  '  Building external modules.'    1432         @echo  '  Building external modules.'
1808         @echo  '  Syntax: make -C path/to/ker    1433         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1809         @echo  ''                                1434         @echo  ''
1810         @echo  '  modules         - default t    1435         @echo  '  modules         - default target, build the module(s)'
1811         @echo  '  modules_install - install t    1436         @echo  '  modules_install - install the module'
1812         @echo  '  clean           - remove ge    1437         @echo  '  clean           - remove generated files in module directory only'
1813         @echo  '  rust-analyzer   - generate  << 
1814         @echo  ''                                1438         @echo  ''
1815                                                  1439 
1816 ifndef CONFIG_MODULES                         !! 1440 # Dummies...
1817 modules modules_install: __external_modules_e !! 1441 PHONY += prepare scripts
1818 __external_modules_error:                     !! 1442 prepare: ;
1819         @echo >&2 '***'                       !! 1443 scripts: ;
1820         @echo >&2 '*** The present kernel dis << 
1821         @echo >&2 '*** You cannot build or in << 
1822         @echo >&2 '***'                       << 
1823         @false                                << 
1824 endif                                         << 
1825                                               << 
1826 endif # KBUILD_EXTMOD                            1444 endif # KBUILD_EXTMOD
1827                                                  1445 
1828 # ------------------------------------------- << 
1829 # Modules                                     << 
1830                                               << 
1831 PHONY += modules modules_install modules_sign << 
1832                                               << 
1833 modules_install:                              << 
1834         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1835         sign-only=$(if $(filter modules_insta << 
1836                                               << 
1837 ifeq ($(CONFIG_MODULE_SIG),y)                 << 
1838 # modules_sign is a subset of modules_install << 
1839 # 'make modules_install modules_sign' is equi << 
1840 modules_sign: modules_install                 << 
1841         @:                                    << 
1842 else                                          << 
1843 modules_sign:                                 << 
1844         @echo >&2 '***'                       << 
1845         @echo >&2 '*** CONFIG_MODULE_SIG is d << 
1846         @echo >&2 '***'                       << 
1847         @false                                << 
1848 endif                                         << 
1849                                               << 
1850 ifdef CONFIG_MODULES                          << 
1851                                               << 
1852 $(MODORDER): $(build-dir)                     << 
1853         @:                                    << 
1854                                               << 
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t << 
1856 # This is solely useful to speed up test comp << 
1857 modules: modpost                              << 
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1859         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1860 endif                                         << 
1861                                               << 
1862 PHONY += modules_check                        << 
1863 modules_check: $(MODORDER)                    << 
1864         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1865                                               << 
1866 else # CONFIG_MODULES                         << 
1867                                               << 
1868 modules:                                      << 
1869         @:                                    << 
1870                                               << 
1871 KBUILD_MODULES :=                             << 
1872                                               << 
1873 endif # CONFIG_MODULES                        << 
1874                                               << 
1875 PHONY += modpost                              << 
1876 modpost: $(if $(single-build),, $(if $(KBUILD << 
1877          $(if $(KBUILD_MODULES), modules_chec << 
1878         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1879                                               << 
1880 # Single targets                              << 
1881 # ------------------------------------------- << 
1882 # To build individual files in subdirectories << 
1883 #                                             << 
1884 #   make foo/bar/baz.s                        << 
1885 #                                             << 
1886 # The supported suffixes for single-target ar << 
1887 #                                             << 
1888 # To build only under specific subdirectories << 
1889 #                                             << 
1890 #   make foo/bar/baz/                         << 
1891                                               << 
1892 ifdef single-build                            << 
1893                                               << 
1894 # .ko is special because modpost is needed    << 
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG << 
1896 single-no-ko := $(filter-out $(single-ko), $( << 
1897                 $(foreach x, o mod, $(patsubs << 
1898                                               << 
1899 $(single-ko): single_modules                  << 
1900         @:                                    << 
1901 $(single-no-ko): $(build-dir)                 << 
1902         @:                                    << 
1903                                               << 
1904 # Remove MODORDER when done because it is not << 
1905 PHONY += single_modules                       << 
1906 single_modules: $(single-no-ko) modules_prepa << 
1907         $(Q){ $(foreach m, $(single-ko), echo << 
1908         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1)           << 
1910         $(Q)$(MAKE) -f $(srctree)/scripts/Mak << 
1911 endif                                         << 
1912         $(Q)rm -f $(MODORDER)                 << 
1913                                               << 
1914 single-goals := $(addprefix $(build-dir)/, $( << 
1915                                               << 
1916 KBUILD_MODULES := 1                           << 
1917                                               << 
1918 endif                                         << 
1919                                               << 
1920 # Preset locale variables to speed up the bui << 
1921 # tweaks to this spot to avoid wrong language << 
1922 # make menuconfig etc.                        << 
1923 # Error messages still appears in the origina << 
1924 PHONY += $(build-dir)                         << 
1925 $(build-dir): prepare                         << 
1926         $(Q)$(MAKE) $(build)=$@ need-builtin= << 
1927                                               << 
1928 clean-dirs := $(addprefix _clean_, $(clean-di << 
1929 PHONY += $(clean-dirs) clean                  << 
1930 $(clean-dirs):                                << 
1931         $(Q)$(MAKE) $(clean)=$(patsubst _clea << 
1932                                               << 
1933 clean: $(clean-dirs)                          << 
1934         $(call cmd,rmfiles)                   << 
1935         @find $(or $(KBUILD_EXTMOD), .) $(RCS << 
1936                 \( -name '*.[aios]' -o -name  << 
1937                 -o -name '*.ko.*' \           << 
1938                 -o -name '*.dtb' -o -name '*. << 
1939                 -o -name '*.dtb.S' -o -name ' << 
1940                 -o -name '*.dt.yaml' -o -name << 
1941                 -o -name '*.dwo' -o -name '*. << 
1942                 -o -name '*.su' -o -name '*.m << 
1943                 -o -name '.*.d' -o -name '.*. << 
1944                 -o -name '*.lex.c' -o -name ' << 
1945                 -o -name '*.asn1.[ch]' \      << 
1946                 -o -name '*.symtypes' -o -nam << 
1947                 -o -name '*.c.[012]*.*' \     << 
1948                 -o -name '*.ll' \             << 
1949                 -o -name '*.gcno' \           << 
1950                 -o -name '*.*.symversions' \) << 
1951                 -o -name '.tmp_*' -print \    << 
1952                 | xargs rm -rf                << 
1953                                               << 
1954 # Generate tags for editors                      1446 # Generate tags for editors
1955 # -------------------------------------------    1447 # ---------------------------------------------------------------------------
1956 quiet_cmd_tags = GEN     $@                      1448 quiet_cmd_tags = GEN     $@
1957       cmd_tags = $(BASH) $(srctree)/scripts/t !! 1449       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1958                                                  1450 
1959 tags TAGS cscope gtags: FORCE                 !! 1451 tags TAGS cscope: FORCE
1960         $(call cmd,tags)                         1452         $(call cmd,tags)
1961                                                  1453 
1962 # Generate rust-project.json (a file that des << 
1963 # Rust projects) for rust-analyzer (an implem << 
1964 # Protocol).                                  << 
1965 PHONY += rust-analyzer                        << 
1966 rust-analyzer:                                << 
1967         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip << 
1968         $(Q)$(MAKE) $(build)=rust $@          << 
1969                                               << 
1970 # Script to generate missing namespace depend << 
1971 # ------------------------------------------- << 
1972                                               << 
1973 PHONY += nsdeps                               << 
1974 nsdeps: export KBUILD_NSDEPS=1                << 
1975 nsdeps: modules                               << 
1976         $(Q)$(CONFIG_SHELL) $(srctree)/script << 
1977                                               << 
1978 # Clang Tooling                               << 
1979 # ------------------------------------------- << 
1980                                               << 
1981 quiet_cmd_gen_compile_commands = GEN     $@   << 
1982       cmd_gen_compile_commands = $(PYTHON3) $ << 
1983                                               << 
1984 $(extmod_prefix)compile_commands.json: $(srct << 
1985         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K << 
1986         $(if $(CONFIG_MODULES), $(MODORDER))  << 
1987         $(call if_changed,gen_compile_command << 
1988                                               << 
1989 targets += $(extmod_prefix)compile_commands.j << 
1990                                               << 
1991 PHONY += clang-tidy clang-analyzer            << 
1992                                               << 
1993 ifdef CONFIG_CC_IS_CLANG                      << 
1994 quiet_cmd_clang_tools = CHECK   $<            << 
1995       cmd_clang_tools = $(PYTHON3) $(srctree) << 
1996                                               << 
1997 clang-tidy clang-analyzer: $(extmod_prefix)co << 
1998         $(call cmd,clang_tools)               << 
1999 else                                          << 
2000 clang-tidy clang-analyzer:                    << 
2001         @echo "$@ requires CC=clang" >&2      << 
2002         @false                                << 
2003 endif                                         << 
2004                                               << 
2005 # Scripts to check various things for consist    1454 # Scripts to check various things for consistency
2006 # -------------------------------------------    1455 # ---------------------------------------------------------------------------
2007                                                  1456 
2008 PHONY += includecheck versioncheck coccicheck << 
2009                                               << 
2010 includecheck:                                    1457 includecheck:
2011         find $(srctree)/* $(RCS_FIND_IGNORE)  !! 1458         find * $(RCS_FIND_IGNORE) \
2012                 -name '*.[hcS]' -type f -prin    1459                 -name '*.[hcS]' -type f -print | sort \
2013                 | xargs $(PERL) -w $(srctree)    1460                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
2014                                                  1461 
2015 versioncheck:                                    1462 versioncheck:
2016         find $(srctree)/* $(RCS_FIND_IGNORE)  !! 1463         find * $(RCS_FIND_IGNORE) \
2017                 -name '*.[hcS]' -type f -prin    1464                 -name '*.[hcS]' -type f -print | sort \
2018                 | xargs $(PERL) -w $(srctree)    1465                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
2019                                                  1466 
2020 coccicheck:                                   !! 1467 namespacecheck:
2021         $(Q)$(BASH) $(srctree)/scripts/$@     !! 1468         $(PERL) $(srctree)/scripts/namespace.pl
2022                                                  1469 
2023 export_report:                                   1470 export_report:
2024         $(PERL) $(srctree)/scripts/export_rep    1471         $(PERL) $(srctree)/scripts/export_report.pl
2025                                                  1472 
2026 PHONY += checkstack kernelrelease kernelversi !! 1473 endif #ifeq ($(config-targets),1)
                                                   >> 1474 endif #ifeq ($(mixed-targets),1)
                                                   >> 1475 
                                                   >> 1476 PHONY += checkstack kernelrelease kernelversion
2027                                                  1477 
2028 # UML needs a little special treatment here.     1478 # UML needs a little special treatment here.  It wants to use the host
2029 # toolchain, so needs $(SUBARCH) passed to ch    1479 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2030 # else wants $(ARCH), including people doing     1480 # else wants $(ARCH), including people doing cross-builds, which means
2031 # that $(SUBARCH) doesn't work here.             1481 # that $(SUBARCH) doesn't work here.
2032 ifeq ($(ARCH), um)                               1482 ifeq ($(ARCH), um)
2033 CHECKSTACK_ARCH := $(SUBARCH)                    1483 CHECKSTACK_ARCH := $(SUBARCH)
2034 else                                             1484 else
2035 CHECKSTACK_ARCH := $(ARCH)                       1485 CHECKSTACK_ARCH := $(ARCH)
2036 endif                                            1486 endif
2037 MINSTACKSIZE    ?= 100                        << 
2038 checkstack:                                      1487 checkstack:
2039         $(OBJDUMP) -d vmlinux $$(find . -name    1488         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
2040         $(PERL) $(srctree)/scripts/checkstack !! 1489         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
2041                                                  1490 
2042 kernelrelease:                                   1491 kernelrelease:
2043         @$(filechk_kernel.release)            !! 1492         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
2044                                               !! 1493         $(error kernelrelease not valid - run 'make prepare' to update it))
2045 kernelversion:                                   1494 kernelversion:
2046         @echo $(KERNELVERSION)                   1495         @echo $(KERNELVERSION)
2047                                                  1496 
2048 image_name:                                   !! 1497 # Single targets
2049         @echo $(KBUILD_IMAGE)                 !! 1498 # ---------------------------------------------------------------------------
                                                   >> 1499 # Single targets are compatible with:
                                                   >> 1500 # - build with mixed source and output
                                                   >> 1501 # - build with separate output dir 'make O=...'
                                                   >> 1502 # - external modules
                                                   >> 1503 #
                                                   >> 1504 #  target-dir => where to store outputfile
                                                   >> 1505 #  build-dir  => directory in kernel source tree to use
                                                   >> 1506 
                                                   >> 1507 ifeq ($(KBUILD_EXTMOD),)
                                                   >> 1508         build-dir  = $(patsubst %/,%,$(dir $@))
                                                   >> 1509         target-dir = $(dir $@)
                                                   >> 1510 else
                                                   >> 1511         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
                                                   >> 1512         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
                                                   >> 1513         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
                                                   >> 1514 endif
                                                   >> 1515 
                                                   >> 1516 %.s: %.c prepare scripts FORCE
                                                   >> 1517         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1518 %.i: %.c prepare scripts FORCE
                                                   >> 1519         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1520 %.o: %.c prepare scripts FORCE
                                                   >> 1521         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1522 %.lst: %.c prepare scripts FORCE
                                                   >> 1523         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1524 %.s: %.S prepare scripts FORCE
                                                   >> 1525         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1526 %.o: %.S prepare scripts FORCE
                                                   >> 1527         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1528 %.symtypes: %.c prepare scripts FORCE
                                                   >> 1529         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
                                                   >> 1530 
                                                   >> 1531 # Modules
                                                   >> 1532 /: prepare scripts FORCE
                                                   >> 1533         $(cmd_crmodverdir)
                                                   >> 1534         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
                                                   >> 1535         $(build)=$(build-dir)
                                                   >> 1536 %/: prepare scripts FORCE
                                                   >> 1537         $(cmd_crmodverdir)
                                                   >> 1538         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
                                                   >> 1539         $(build)=$(build-dir)
                                                   >> 1540 %.ko: prepare scripts FORCE
                                                   >> 1541         $(cmd_crmodverdir)
                                                   >> 1542         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
                                                   >> 1543         $(build)=$(build-dir) $(@:.ko=.o)
                                                   >> 1544         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
                                                   >> 1545 
                                                   >> 1546 # FIXME Should go into a make.lib or something 
                                                   >> 1547 # ===========================================================================
2050                                                  1548 
2051 PHONY += run-command                          !! 1549 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
2052 run-command:                                  !! 1550       cmd_rmdirs = rm -rf $(rm-dirs)
2053         $(Q)$(KBUILD_RUN_COMMAND)             << 
2054                                                  1551 
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    1552 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
2056       cmd_rmfiles = rm -rf $(rm-files)        !! 1553       cmd_rmfiles = rm -f $(rm-files)
2057                                                  1554 
2058 # read saved command lines for existing targe !! 1555 # Run depmod only if we have System.map and depmod is executable
2059 existing-targets := $(wildcard $(sort $(targe !! 1556 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
                                                   >> 1557       cmd_depmod = \
                                                   >> 1558         if [ -r System.map -a -x $(DEPMOD) ]; then                              \
                                                   >> 1559                 $(DEPMOD) -ae -F System.map                                     \
                                                   >> 1560                 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) )     \
                                                   >> 1561                 $(KERNELRELEASE);                                               \
                                                   >> 1562         fi
                                                   >> 1563 
                                                   >> 1564 # Create temporary dir for module support files
                                                   >> 1565 # clean it up only when building all modules
                                                   >> 1566 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
                                                   >> 1567                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
                                                   >> 1568 
                                                   >> 1569 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
                                                   >> 1570           $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
                                                   >> 1571           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
                                                   >> 1572 
                                                   >> 1573 quiet_cmd_as_o_S = AS      $@
                                                   >> 1574 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
                                                   >> 1575 
                                                   >> 1576 # read all saved command lines
                                                   >> 1577 
                                                   >> 1578 targets := $(wildcard $(sort $(targets)))
                                                   >> 1579 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
                                                   >> 1580 
                                                   >> 1581 ifneq ($(cmd_files),)
                                                   >> 1582   $(cmd_files): ;       # Do not try to update included dependency files
                                                   >> 1583   include $(cmd_files)
                                                   >> 1584 endif
2060                                                  1585 
2061 -include $(foreach f,$(existing-targets),$(di !! 1586 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
                                                   >> 1587 # Usage:
                                                   >> 1588 # $(Q)$(MAKE) $(clean)=dir
                                                   >> 1589 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
2062                                                  1590 
2063 endif # config-build                          !! 1591 endif   # skip-makefile
2064 endif # mixed-build                           << 
2065 endif # need-sub-make                         << 
2066                                                  1592 
2067 PHONY += FORCE                                   1593 PHONY += FORCE
2068 FORCE:                                           1594 FORCE:
2069                                                  1595 
2070 # Declare the contents of the PHONY variable  !! 1596 # Declare the contents of the .PHONY variable as phony.  We keep that
2071 # information in a variable so we can use it     1597 # information in a variable so we can use it in if_changed and friends.
2072 .PHONY: $(PHONY)                                 1598 .PHONY: $(PHONY)
                                                      

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