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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 policy-sample)


  1 # SPDX-License-Identifier: GPL-2.0                
  2 VERSION = 6                                       
  3 PATCHLEVEL = 11                                   
  4 SUBLEVEL = 5                                      
  5 EXTRAVERSION =                                    
  6 NAME = Baby Opossum Posse                         
  7                                                   
  8 # *DOCUMENTATION*                                 
  9 # To see a list of typical targets execute "ma    
 10 # More info can be located in ./README            
 11 # Comments in this file are targeted only to t    
 12 # expect to learn how to build the kernel read    
 13                                                   
 14 ifeq ($(filter output-sync,$(.FEATURES)),)        
 15 $(error GNU Make >= 4.0 is required. Your Make    
 16 endif                                             
 17                                                   
 18 $(if $(filter __%, $(MAKECMDGOALS)), \            
 19         $(error targets prefixed with '__' are    
 20                                                   
 21 # That's our default target when none is given    
 22 PHONY := __all                                    
 23 __all:                                            
 24                                                   
 25 # We are using a recursive build, so we need t    
 26 # to get the ordering right.                      
 27 #                                                 
 28 # Most importantly: sub-Makefiles should only     
 29 # their own directory. If in some directory we    
 30 # a file in another dir (which doesn't happen     
 31 # unavoidable when linking the built-in.a targ    
 32 # turn into vmlinux), we will call a sub make     
 33 # after that we are sure that everything which    
 34 # is now up to date.                              
 35 #                                                 
 36 # The only cases where we need to modify files    
 37 # effects are thus separated out and done befo    
 38 # descending is started. They are now explicit    
 39 # prepare rule.                                   
 40                                                   
 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) $(build)=scripts/basic           
 75 #                                                 
 76 # If KBUILD_VERBOSE contains 1, the whole comm    
 77 # If KBUILD_VERBOSE contains 2, the reason for    
 78 #                                                 
 79 # To put more focus on warnings, be less verbo    
 80 # Use 'make V=1' to see the full commands         
 81                                                   
 82 ifeq ("$(origin V)", "command line")              
 83   KBUILD_VERBOSE = $(V)                           
 84 endif                                             
 85                                                   
 86 quiet = quiet_                                    
 87 Q = @                                             
 88                                                   
 89 ifneq ($(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                                             
100                                                   
101 export quiet Q KBUILD_VERBOSE                     
102                                                   
103 # Call a source code checker (by default, "spa    
104 # C compilation.                                  
105 #                                                 
106 # Use 'make C=1' to enable checking of only re    
107 # Use 'make C=2' to enable checking of *all* s    
108 # of whether they are re-compiled or not.         
109 #                                                 
110 # See the file "Documentation/dev-tools/sparse    
111 # including where to get the "sparse" utility.    
112                                                   
113 ifeq ("$(origin C)", "command line")              
114   KBUILD_CHECKSRC = $(C)                          
115 endif                                             
116 ifndef KBUILD_CHECKSRC                            
117   KBUILD_CHECKSRC = 0                             
118 endif                                             
119                                                   
120 export KBUILD_CHECKSRC                            
121                                                   
122 # Enable "clippy" (a linter) as part of the Ru    
123 #                                                 
124 # Use 'make CLIPPY=1' to enable it.               
125 ifeq ("$(origin CLIPPY)", "command line")         
126   KBUILD_CLIPPY := $(CLIPPY)                      
127 endif                                             
128                                                   
129 export KBUILD_CLIPPY                              
130                                                   
131 # Use make M=dir or set the environment variab    
132 # directory of external module to build. Setti    
133 ifeq ("$(origin M)", "command line")              
134   KBUILD_EXTMOD := $(M)                           
135 endif                                             
136                                                   
137 $(if $(word 2, $(KBUILD_EXTMOD)), \               
138         $(error building multiple external mod    
139                                                   
140 $(foreach x, % :, $(if $(findstring $x, $(KBUI    
141         $(error module directory path cannot c    
142                                                   
143 # Remove trailing slashes                         
144 ifneq ($(filter %/, $(KBUILD_EXTMOD)),)           
145 KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTM    
146 endif                                             
147                                                   
148 export KBUILD_EXTMOD                              
149                                                   
150 # backward compatibility                          
151 KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC    
152                                                   
153 ifeq ("$(origin W)", "command line")              
154   KBUILD_EXTRA_WARN := $(W)                       
155 endif                                             
156                                                   
157 export KBUILD_EXTRA_WARN                          
158                                                   
159 # Kbuild will save output files in the current    
160 # This does not need to match to the root of t    
161 #                                                 
162 # For example, you can do this:                   
163 #                                                 
164 #  cd /dir/to/store/output/files; make -f /dir    
165 #                                                 
166 # If you want to save output files in a differ    
167 # two syntaxes to specify it.                     
168 #                                                 
169 # 1) O=                                           
170 # Use "make O=dir/to/store/output/files/"         
171 #                                                 
172 # 2) Set KBUILD_OUTPUT                            
173 # Set the environment variable KBUILD_OUTPUT t    
174 # export KBUILD_OUTPUT=dir/to/store/output/fil    
175 #                                                 
176 # The O= assignment takes precedence over the     
177 # variable.                                       
178                                                   
179 # Do we want to change the working directory?     
180 ifeq ("$(origin O)", "command line")              
181   KBUILD_OUTPUT := $(O)                           
182 endif                                             
183                                                   
184 ifneq ($(KBUILD_OUTPUT),)                         
185 # $(realpath ...) gets empty if the path does     
186 $(shell mkdir -p "$(KBUILD_OUTPUT)")              
187 # $(realpath ...) resolves symlinks               
188 abs_objtree := $(realpath $(KBUILD_OUTPUT))       
189 $(if $(abs_objtree),,$(error failed to create     
190 endif # ifneq ($(KBUILD_OUTPUT),)                 
191                                                   
192 ifneq ($(words $(subst :, ,$(abs_srctree))), 1    
193 $(error source directory cannot contain spaces    
194 endif                                             
195                                                   
196 export sub_make_done := 1                         
197                                                   
198 endif # sub_make_done                             
199                                                   
200 ifeq ($(abs_objtree),$(CURDIR))                   
201 # Suppress "Entering directory ..." if we are     
202 no-print-directory := --no-print-directory        
203 else                                              
204 # Recursion to show "Entering directory ..."      
205 need-sub-make := 1                                
206 endif                                             
207                                                   
208 ifeq ($(filter --no-print-directory, $(MAKEFLA    
209 # If --no-print-directory is unset, recurse on    
210 # You may end up recursing into __sub-make twi    
211 # behavior change in GNU Make 4.4.1.              
212 need-sub-make := 1                                
213 endif                                             
214                                                   
215 ifeq ($(need-sub-make),1)                         
216                                                   
217 PHONY += $(MAKECMDGOALS) __sub-make               
218                                                   
219 $(filter-out $(this-makefile), $(MAKECMDGOALS)    
220         @:                                        
221                                                   
222 # Invoke a second make in the output directory    
223 __sub-make:                                       
224         $(Q)$(MAKE) $(no-print-directory) -C $    
225         -f $(abs_srctree)/Makefile $(MAKECMDGO    
226                                                   
227 else # need-sub-make                              
228                                                   
229 # We process the rest of the Makefile if this     
230                                                   
231 ifeq ($(abs_srctree),$(abs_objtree))              
232         # building in the source tree             
233         srctree := .                              
234         building_out_of_srctree :=                
235 else                                              
236         ifeq ($(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 ($(KBUILD_EXTMOD),)                          
306     ifneq ($(filter %config,$(MAKECMDGOALS)),)    
307         config-build := 1                         
308         ifneq ($(words $(MAKECMDGOALS)),1)        
309             mixed-build := 1                      
310         endif                                     
311     endif                                         
312 endif                                             
313                                                   
314 # We cannot build single targets and the other    
315 ifneq ($(filter $(single-targets), $(MAKECMDGO    
316     single-build := 1                             
317     ifneq ($(filter-out $(single-targets), $(M    
318         mixed-build := 1                          
319     endif                                         
320 endif                                             
321                                                   
322 # For "make -j clean all", "make -j mrproper d    
323 ifneq ($(filter $(clean-targets),$(MAKECMDGOAL    
324     ifneq ($(filter-out $(clean-targets),$(MAK    
325         mixed-build := 1                          
326     endif                                         
327 endif                                             
328                                                   
329 # install and modules_install need also be pro    
330 ifneq ($(filter install,$(MAKECMDGOALS)),)        
331     ifneq ($(filter modules_install,$(MAKECMDG    
332         mixed-build := 1                          
333     endif                                         
334 endif                                             
335                                                   
336 ifdef mixed-build                                 
337 # ============================================    
338 # We're called with mixed targets (*config and    
339 # Handle them one by one.                         
340                                                   
341 PHONY += $(MAKECMDGOALS) __build_one_by_one       
342                                                   
343 $(MAKECMDGOALS): __build_one_by_one               
344         @:                                        
345                                                   
346 __build_one_by_one:                               
347         $(Q)set -e; \                             
348         for i in $(MAKECMDGOALS); do \            
349                 $(MAKE) -f $(srctree)/Makefile    
350         done                                      
351                                                   
352 else # !mixed-build                               
353                                                   
354 include $(srctree)/scripts/Kbuild.include         
355                                                   
356 # Read KERNELRELEASE from include/config/kerne    
357 KERNELRELEASE = $(call read-file, include/conf    
358 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.    
359 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEA    
360                                                   
361 include $(srctree)/scripts/subarch.include        
362                                                   
363 # Cross compiling and selecting different set     
364 # --------------------------------------------    
365 #                                                 
366 # When performing cross compilation for other     
367 # to the target architecture. (See arch/* for     
368 # ARCH can be set during invocation of make:      
369 # make ARCH=arm64                                 
370 # Another way is to have ARCH set in the envir    
371 # The default ARCH is the host where make is e    
372                                                   
373 # CROSS_COMPILE specify the prefix used for al    
374 # during compilation. Only gcc and related bin    
375 # are prefixed with $(CROSS_COMPILE).             
376 # CROSS_COMPILE can be set on the command line    
377 # make CROSS_COMPILE=aarch64-linux-gnu-           
378 # Alternatively CROSS_COMPILE can be set in th    
379 # Default value for CROSS_COMPILE is not to pr    
380 # Note: Some architectures assign CROSS_COMPIL    
381 ARCH            ?= $(SUBARCH)                     
382                                                   
383 # Architecture as present in compile.h            
384 UTS_MACHINE     := $(ARCH)                        
385 SRCARCH         := $(ARCH)                        
386                                                   
387 # Additional ARCH settings for x86                
388 ifeq ($(ARCH),i386)                               
389         SRCARCH := x86                            
390 endif                                             
391 ifeq ($(ARCH),x86_64)                             
392         SRCARCH := x86                            
393 endif                                             
394                                                   
395 # Additional ARCH settings for sparc              
396 ifeq ($(ARCH),sparc32)                            
397        SRCARCH := sparc                           
398 endif                                             
399 ifeq ($(ARCH),sparc64)                            
400        SRCARCH := sparc                           
401 endif                                             
402                                                   
403 # Additional ARCH settings for parisc             
404 ifeq ($(ARCH),parisc64)                           
405        SRCARCH := parisc                          
406 endif                                             
407                                                   
408 export cross_compiling :=                         
409 ifneq ($(SRCARCH),$(SUBARCH))                     
410 cross_compiling := 1                              
411 endif                                             
412                                                   
413 KCONFIG_CONFIG  ?= .config                        
414 export KCONFIG_CONFIG                             
415                                                   
416 # SHELL used by kbuild                            
417 CONFIG_SHELL := sh                                
418                                                   
419 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS     
420 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAG    
421 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/d    
422                                                   
423 ifneq ($(LLVM),)                                  
424 ifneq ($(filter %/,$(LLVM)),)                     
425 LLVM_PREFIX := $(LLVM)                            
426 else ifneq ($(filter -%,$(LLVM)),)                
427 LLVM_SUFFIX := $(LLVM)                            
428 endif                                             
429                                                   
430 HOSTCC  = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)       
431 HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)     
432 else                                              
433 HOSTCC  = gcc                                     
434 HOSTCXX = g++                                     
435 endif                                             
436 HOSTRUSTC = rustc                                 
437 HOSTPKG_CONFIG  = pkg-config                      
438                                                   
439 KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-proto    
440                          -O2 -fomit-frame-poin    
441 KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS)    
442 KBUILD_USERLDFLAGS := $(USERLDFLAGS)              
443                                                   
444 # These flags apply to all Rust code in the tr    
445 # host programs.                                  
446 export rust_common_flags := --edition=2021 \      
447                             -Zbinary_dep_depin    
448                             -Astable_features     
449                             -Dunsafe_op_in_uns    
450                             -Dnon_ascii_idents    
451                             -Wrust_2018_idioms    
452                             -Wunreachable_pub     
453                             -Wmissing_docs \      
454                             -Wrustdoc::missing    
455                             -Wclippy::all \       
456                             -Wclippy::mut_mut     
457                             -Wclippy::needless    
458                             -Wclippy::needless    
459                             -Wclippy::no_mangl    
460                             -Wclippy::dbg_macr    
461                                                   
462 KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS    
463                        $(HOSTCFLAGS) -I $(srct    
464 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CF    
465                        -I $(srctree)/scripts/i    
466 KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -    
467                         -Zallow-features= $(HO    
468 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(H    
469 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOST    
470                                                   
471 # Make variables (CC, etc...)                     
472 CPP             = $(CC) -E                        
473 ifneq ($(LLVM),)                                  
474 CC              = $(LLVM_PREFIX)clang$(LLVM_SU    
475 LD              = $(LLVM_PREFIX)ld.lld$(LLVM_S    
476 AR              = $(LLVM_PREFIX)llvm-ar$(LLVM_    
477 NM              = $(LLVM_PREFIX)llvm-nm$(LLVM_    
478 OBJCOPY         = $(LLVM_PREFIX)llvm-objcopy$(    
479 OBJDUMP         = $(LLVM_PREFIX)llvm-objdump$(    
480 READELF         = $(LLVM_PREFIX)llvm-readelf$(    
481 STRIP           = $(LLVM_PREFIX)llvm-strip$(LL    
482 else                                              
483 CC              = $(CROSS_COMPILE)gcc             
484 LD              = $(CROSS_COMPILE)ld              
485 AR              = $(CROSS_COMPILE)ar              
486 NM              = $(CROSS_COMPILE)nm              
487 OBJCOPY         = $(CROSS_COMPILE)objcopy         
488 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  = $(objtree)/tools/bpf/resolve    
499 LEX             = flex                            
500 YACC            = bison                           
501 AWK             = awk                             
502 INSTALLKERNEL  := installkernel                   
503 PERL            = perl                            
504 PYTHON3         = python3                         
505 CHECK           = sparse                          
506 BASH            = bash                            
507 KGZIP           = gzip                            
508 KBZIP2          = bzip2                           
509 KLZOP           = lzop                            
510 LZMA            = lzma                            
511 LZ4             = lz4c                            
512 XZ              = xz                              
513 ZSTD            = zstd                            
514                                                   
515 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC    
516                   -Wbitwise -Wno-return-void -    
517 NOSTDINC_FLAGS :=                                 
518 CFLAGS_MODULE   =                                 
519 RUSTFLAGS_MODULE =                                
520 AFLAGS_MODULE   =                                 
521 LDFLAGS_MODULE  =                                 
522 CFLAGS_KERNEL   =                                 
523 RUSTFLAGS_KERNEL =                                
524 AFLAGS_KERNEL   =                                 
525 LDFLAGS_vmlinux =                                 
526                                                   
527 # Use USERINCLUDE when you must reference the     
528 USERINCLUDE    := \                               
529                 -I$(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 $(srctree)/include/li    
535                                                   
536 # Use LINUXINCLUDE when you must reference the    
537 # Needed to be compatible with the O= option      
538 LINUXINCLUDE    := \                              
539                 -I$(srctree)/arch/$(SRCARCH)/i    
540                 -I$(objtree)/arch/$(SRCARCH)/i    
541                 $(if $(building_out_of_srctree    
542                 -I$(objtree)/include \            
543                 $(USERINCLUDE)                    
544                                                   
545 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE        
546                                                   
547 KBUILD_CFLAGS :=                                  
548 KBUILD_CFLAGS += -std=gnu11                       
549 KBUILD_CFLAGS += -fshort-wchar                    
550 KBUILD_CFLAGS += -funsigned-char                  
551 KBUILD_CFLAGS += -fno-common                      
552 KBUILD_CFLAGS += -fno-PIE                         
553 KBUILD_CFLAGS += -fno-strict-aliasing             
554                                                   
555 KBUILD_CPPFLAGS := -D__KERNEL__                   
556 KBUILD_RUSTFLAGS := $(rust_common_flags) \        
557                     -Cpanic=abort -Cembed-bitc    
558                     -Cforce-unwind-tables=n -C    
559                     -Csymbol-mangling-version=    
560                     -Crelocation-model=static     
561                     -Zfunction-sections=n \       
562                     -Wclippy::float_arithmetic    
563                                                   
564 KBUILD_AFLAGS_KERNEL :=                           
565 KBUILD_CFLAGS_KERNEL :=                           
566 KBUILD_RUSTFLAGS_KERNEL :=                        
567 KBUILD_AFLAGS_MODULE  := -DMODULE                 
568 KBUILD_CFLAGS_MODULE  := -DMODULE                 
569 KBUILD_RUSTFLAGS_MODULE := --cfg MODULE           
570 KBUILD_LDFLAGS_MODULE :=                          
571 KBUILD_LDFLAGS :=                                 
572 CLANG_FLAGS :=                                    
573                                                   
574 ifeq ($(KBUILD_CLIPPY),1)                         
575         RUSTC_OR_CLIPPY_QUIET := CLIPPY           
576         RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)        
577 else                                              
578         RUSTC_OR_CLIPPY_QUIET := RUSTC            
579         RUSTC_OR_CLIPPY = $(RUSTC)                
580 endif                                             
581                                                   
582 ifdef RUST_LIB_SRC                                
583         export RUST_LIB_SRC                       
584 endif                                             
585                                                   
586 # Allows the usage of unstable features in sta    
587 export RUSTC_BOOTSTRAP := 1                       
588                                                   
589 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC K    
590 export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_Q    
591 export HOSTRUSTC KBUILD_HOSTRUSTFLAGS             
592 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF    
593 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_    
594 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD        
595 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS     
596 export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS       
597                                                   
598 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINC    
599 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODU    
600 export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTF    
601 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODU    
602 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODU    
603 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERN    
604                                                   
605 # Files to ignore in find ... statements          
606                                                   
607 export RCS_FIND_IGNORE := \( -name SCCS -o -na    
608                           -name CVS -o -name .    
609                           -prune -o               
610                                                   
611 # ============================================    
612 # Rules shared between *config targets and bui    
613                                                   
614 # Basic helpers built in scripts/basic/           
615 PHONY += scripts_basic                            
616 scripts_basic:                                    
617         $(Q)$(MAKE) $(build)=scripts/basic        
618                                                   
619 PHONY += outputmakefile                           
620 ifdef building_out_of_srctree                     
621 # Before starting out-of-tree build, make sure    
622 # outputmakefile generates a Makefile in the o    
623 # separate output directory. This allows conve    
624 # output directory.                               
625 # At the same time when output Makefile genera    
626 # ignore whole output directory                   
627                                                   
628 quiet_cmd_makefile = GEN     Makefile             
629       cmd_makefile = { \                          
630         echo "\# Automatically generated by $(    
631         echo "include $(srctree)/Makefile"; \     
632         } > Makefile                              
633                                                   
634 outputmakefile:                                   
635         @if [ -f $(srctree)/.config -o \          
636                  -d $(srctree)/include/config     
637                  -d $(srctree)/arch/$(SRCARCH)    
638                 echo >&2 "***"; \                 
639                 echo >&2 "*** The source tree     
640                 echo >&2 "*** in $(abs_srctree    
641                 echo >&2 "***"; \                 
642                 false; \                          
643         fi                                        
644         $(Q)ln -fsn $(srctree) source             
645         $(call cmd,makefile)                      
646         $(Q)test -e .gitignore || \               
647         { echo "# this is build directory, ign    
648 endif                                             
649                                                   
650 # The expansion should be delayed until arch/$    
651 # Some architectures define CROSS_COMPILE in a    
652 # CC_VERSION_TEXT is referenced from Kconfig (    
653 # and from include/config/auto.conf.cmd to det    
654 CC_VERSION_TEXT = $(subst $(pound),,$(shell LC    
655                                                   
656 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),    
657 include $(srctree)/scripts/Makefile.clang         
658 endif                                             
659                                                   
660 # Include this also for config targets because    
661 # cc-cross-prefix to determine CROSS_COMPILE.     
662 ifdef need-compiler                               
663 include $(srctree)/scripts/Makefile.compiler      
664 endif                                             
665                                                   
666 ifdef config-build                                
667 # ============================================    
668 # *config targets only - make sure prerequisit    
669 # in scripts/kconfig to make the *config targe    
670                                                   
671 # Read arch-specific Makefile to set KBUILD_DE    
672 # KBUILD_DEFCONFIG may point out an alternativ    
673 # used for 'make defconfig'                       
674 include $(srctree)/arch/$(SRCARCH)/Makefile       
675 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERS    
676                                                   
677 config: outputmakefile scripts_basic FORCE        
678         $(Q)$(MAKE) $(build)=scripts/kconfig $    
679                                                   
680 %config: outputmakefile scripts_basic FORCE       
681         $(Q)$(MAKE) $(build)=scripts/kconfig $    
682                                                   
683 else #!config-build                               
684 # ============================================    
685 # Build targets only - this includes vmlinux,     
686 # targets and others. In general all targets e    
687                                                   
688 # If building an external module we do not car    
689 # but instead __all depend on modules             
690 PHONY += all                                      
691 ifeq ($(KBUILD_EXTMOD),)                          
692 __all: all                                        
693 else                                              
694 __all: modules                                    
695 endif                                             
696                                                   
697 targets :=                                        
698                                                   
699 # Decide whether to build built-in, modular, o    
700 # Normally, just do built-in.                     
701                                                   
702 KBUILD_MODULES :=                                 
703 KBUILD_BUILTIN := 1                               
704                                                   
705 # If we have only "make modules", don't compil    
706 ifeq ($(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                                                   
728 ifeq ($(KBUILD_EXTMOD),)                          
729 # Objects we will link into vmlinux / subdirs     
730 core-y          :=                                
731 drivers-y       :=                                
732 libs-y          := lib/                           
733 endif # KBUILD_EXTMOD                             
734                                                   
735 # The all: target is the default when no targe    
736 # command line.                                   
737 # This allow a user to issue only 'make' to bu    
738 # Defaults to vmlinux, but the arch makefile u    
739 all: vmlinux                                      
740                                                   
741 CFLAGS_GCOV     := -fprofile-arcs -ftest-cover    
742 ifdef CONFIG_CC_IS_GCC                            
743 CFLAGS_GCOV     += -fno-tree-loop-im              
744 endif                                             
745 export CFLAGS_GCOV                                
746                                                   
747 # The arch Makefiles can override CC_FLAGS_FTR    
748 ifdef CONFIG_FUNCTION_TRACER                      
749   CC_FLAGS_FTRACE := -pg                          
750 endif                                             
751                                                   
752 include $(srctree)/arch/$(SRCARCH)/Makefile       
753                                                   
754 ifdef need-config                                 
755 ifdef may-sync-config                             
756 # Read in dependencies to all Kconfig* files,     
757 # changes are detected. This should be include    
758 # because some architectures define CROSS_COMP    
759 include include/config/auto.conf.cmd              
760                                                   
761 $(KCONFIG_CONFIG):                                
762         @echo >&2 '***'                           
763         @echo >&2 '*** Configuration file "$@"    
764         @echo >&2 '***'                           
765         @echo >&2 '*** Please run some configu    
766         @echo >&2 '*** "make menuconfig" or "m    
767         @echo >&2 '***'                           
768         @/bin/false                               
769                                                   
770 # The actual configuration files used during t    
771 # include/generated/ and include/config/. Upda    
772 # include/config/auto.conf (which mirrors .con    
773 #                                                 
774 # This exploits the 'multi-target pattern rule    
775 # The syncconfig should be executed only once     
776 # (Note: use the grouped target '&:' when we b    
777 #                                                 
778 # Do not use $(call cmd,...) here. That would     
779 # so you cannot notice that Kconfig is waiting    
780 %/config/auto.conf %/config/auto.conf.cmd %/ge    
781         $(Q)$(kecho) "  SYNC    $@"               
782         $(Q)$(MAKE) -f $(srctree)/Makefile syn    
783 else # !may-sync-config                           
784 # External modules and some install targets ne    
785 # and include/config/auto.conf but do not care    
786 # Use auto.conf to trigger the test               
787 PHONY += include/config/auto.conf                 
788                                                   
789 include/config/auto.conf:                         
790         @test -e include/generated/autoconf.h     
791         echo >&2;                                 
792         echo >&2 "  ERROR: Kernel configuratio    
793         echo >&2 "         include/generated/a    
794         echo >&2 "         Run 'make oldconfig    
795         echo >&2 ;                                
796         /bin/false)                               
797                                                   
798 endif # may-sync-config                           
799 endif # need-config                               
800                                                   
801 KBUILD_CFLAGS   += -fno-delete-null-pointer-ch    
802                                                   
803 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE          
804 KBUILD_CFLAGS += -O2                              
805 KBUILD_RUSTFLAGS += -Copt-level=2                 
806 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE            
807 KBUILD_CFLAGS += -Os                              
808 KBUILD_RUSTFLAGS += -Copt-level=s                 
809 endif                                             
810                                                   
811 # Always set `debug-assertions` and `overflow-    
812 # depends on `opt-level` and `debug-assertions    
813 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(    
814 KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(C    
815                                                   
816 # Tell gcc to never replace conditional load w    
817 ifdef CONFIG_CC_IS_GCC                            
818 # gcc-10 renamed --param=allow-store-data-race    
819 # -fno-allow-store-data-races.                    
820 KBUILD_CFLAGS   += $(call cc-option,--param=al    
821 KBUILD_CFLAGS   += $(call cc-option,-fno-allow    
822 endif                                             
823                                                   
824 ifdef CONFIG_READABLE_ASM                         
825 # Disable optimizations that make assembler li    
826 # reorder blocks reorders the control in the f    
827 # ipa clone creates specialized cloned functio    
828 # partial inlining inlines only parts of funct    
829 KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-    
830 endif                                             
831                                                   
832 stackp-flags-y                                    
833 stackp-flags-$(CONFIG_STACKPROTECTOR)             
834 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      
835                                                   
836 KBUILD_CFLAGS += $(stackp-flags-y)                
837                                                   
838 KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarning    
839 KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)         
840                                                   
841 ifdef CONFIG_FRAME_POINTER                        
842 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fn    
843 KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y      
844 else                                              
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           
854 endif                                             
855 endif                                             
856                                                   
857 # Initialize all stack variables with a 0xAA p    
858 ifdef CONFIG_INIT_STACK_ALL_PATTERN               
859 KBUILD_CFLAGS   += -ftrivial-auto-var-init=pat    
860 endif                                             
861                                                   
862 # Initialize all stack variables with a zero v    
863 ifdef CONFIG_INIT_STACK_ALL_ZERO                  
864 KBUILD_CFLAGS   += -ftrivial-auto-var-init=zer    
865 ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER    
866 # https://github.com/llvm/llvm-project/issues/    
867 CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivi    
868 export CC_AUTO_VAR_INIT_ZERO_ENABLER              
869 KBUILD_CFLAGS   += $(CC_AUTO_VAR_INIT_ZERO_ENA    
870 endif                                             
871 endif                                             
872                                                   
873 # While VLAs have been removed, GCC produces u    
874 # for the randomize_kstack_offset feature. Dis    
875 KBUILD_CFLAGS   += $(call cc-option, -fno-stac    
876                                                   
877 # Clear used registers at func exit (to reduce    
878 ifdef CONFIG_ZERO_CALL_USED_REGS                  
879 KBUILD_CFLAGS   += -fzero-call-used-regs=used-    
880 endif                                             
881                                                   
882 ifdef CONFIG_FUNCTION_TRACER                      
883 ifdef CONFIG_FTRACE_MCOUNT_USE_CC                 
884   CC_FLAGS_FTRACE       += -mrecord-mcount        
885   ifdef CONFIG_HAVE_NOP_MCOUNT                    
886     ifeq ($(call cc-option-yn, -mnop-mcount),y    
887       CC_FLAGS_FTRACE   += -mnop-mcount           
888       CC_FLAGS_USING    += -DCC_USING_NOP_MCOU    
889     endif                                         
890   endif                                           
891 endif                                             
892 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL            
893   ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT            
894     CC_FLAGS_USING      += -DCC_USING_NOP_MCOU    
895   endif                                           
896 endif                                             
897 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT       
898   ifdef CONFIG_HAVE_C_RECORDMCOUNT                
899     BUILD_C_RECORDMCOUNT := y                     
900     export BUILD_C_RECORDMCOUNT                   
901   endif                                           
902 endif                                             
903 ifdef CONFIG_HAVE_FENTRY                          
904   # s390-linux-gnu-gcc did not support -mfentr    
905   ifeq ($(call cc-option-yn, -mfentry),y)         
906     CC_FLAGS_FTRACE     += -mfentry               
907     CC_FLAGS_USING      += -DCC_USING_FENTRY      
908   endif                                           
909 endif                                             
910 export CC_FLAGS_FTRACE                            
911 KBUILD_CFLAGS   += $(CC_FLAGS_FTRACE) $(CC_FLA    
912 KBUILD_AFLAGS   += $(CC_FLAGS_USING)              
913 endif                                             
914                                                   
915 # We trigger additional mismatches with less i    
916 ifdef CONFIG_DEBUG_SECTION_MISMATCH               
917 KBUILD_CFLAGS += -fno-inline-functions-called-    
918 endif                                             
919                                                   
920 # `rustc`'s `-Zfunction-sections` applies to d    
921 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION        
922 KBUILD_CFLAGS_KERNEL += -ffunction-sections -f    
923 KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections    
924 LDFLAGS_vmlinux += --gc-sections                  
925 endif                                             
926                                                   
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                                             
974                                                   
975 # arch Makefile may override CC so keep this a    
976 NOSTDINC_FLAGS += -nostdinc                       
977                                                   
978 # To gain proper coverage for CONFIG_UBSAN_BOU    
979 # the kernel uses only C99 flexible arrays for    
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                                                   
988 # disable invalid "can't wrap" optimizations f    
989 KBUILD_CFLAGS   += -fno-strict-overflow           
990                                                   
991 # Make sure -fstack-check isn't enabled (like     
992 KBUILD_CFLAGS  += -fno-stack-check                
993                                                   
994 # conserve stack if available                     
995 ifdef CONFIG_CC_IS_GCC                            
996 KBUILD_CFLAGS   += -fconserve-stack               
997 endif                                             
998                                                   
999 # change __FILE__ to the relative path from th    
1000 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-p    
1001                                                  
1002 # include additional Makefiles when needed       
1003 include-y                       := scripts/Ma    
1004 include-$(CONFIG_DEBUG_INFO)    += scripts/Ma    
1005 include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Ma    
1006 include-$(CONFIG_KASAN)         += scripts/Ma    
1007 include-$(CONFIG_KCSAN)         += scripts/Ma    
1008 include-$(CONFIG_KMSAN)         += scripts/Ma    
1009 include-$(CONFIG_UBSAN)         += scripts/Ma    
1010 include-$(CONFIG_KCOV)          += scripts/Ma    
1011 include-$(CONFIG_RANDSTRUCT)    += scripts/Ma    
1012 include-$(CONFIG_GCC_PLUGINS)   += scripts/Ma    
1013                                                  
1014 include $(addprefix $(srctree)/, $(include-y)    
1015                                                  
1016 # scripts/Makefile.gcc-plugins is intentional    
1017 # Do not add $(call cc-option,...) below this    
1018 # from the clean source tree, the GCC plugins    
1019                                                  
1020 # Add user supplied CPPFLAGS, AFLAGS, CFLAGS     
1021 KBUILD_CPPFLAGS += $(KCPPFLAGS)                  
1022 KBUILD_AFLAGS   += $(KAFLAGS)                    
1023 KBUILD_CFLAGS   += $(KCFLAGS)                    
1024 KBUILD_RUSTFLAGS += $(KRUSTFLAGS)                
1025                                                  
1026 KBUILD_LDFLAGS_MODULE += --build-id=sha1         
1027 LDFLAGS_vmlinux += --build-id=sha1               
1028                                                  
1029 KBUILD_LDFLAGS  += -z noexecstack                
1030 ifeq ($(CONFIG_LD_IS_BFD),y)                     
1031 KBUILD_LDFLAGS  += $(call ld-option,--no-warn    
1032 endif                                            
1033                                                  
1034 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)                
1035 LDFLAGS_vmlinux += -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                                            
1048                                                  
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 $(CONFIG_64BIT),-m64,-m32)    
1061                                                  
1062 # Default kernel image to build when no speci    
1063 # KBUILD_IMAGE may be overruled on the comman    
1064 # set in the environment                         
1065 # Also any assignments in arch/$(ARCH)/Makefi    
1066 # this default value                             
1067 export KBUILD_IMAGE ?= vmlinux                   
1068                                                  
1069 #                                                
1070 # INSTALL_PATH specifies where to place the u    
1071 # images. Default is /boot, but you can set i    
1072 export  INSTALL_PATH ?= /boot                    
1073                                                  
1074 #                                                
1075 # INSTALL_DTBS_PATH specifies a prefix for re    
1076 # Like INSTALL_MOD_PATH, it isn't defined in     
1077 # an argument if needed. Otherwise it default    
1078 #                                                
1079 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/d    
1080                                                  
1081 #                                                
1082 # INSTALL_MOD_PATH specifies a prefix to MODL    
1083 # relocations required by build roots.  This     
1084 # makefile but the argument can be passed to     
1085 #                                                
1086                                                  
1087 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(K    
1088 export MODLIB                                    
1089                                                  
1090 PHONY += prepare0                                
1091                                                  
1092 export extmod_prefix = $(if $(KBUILD_EXTMOD),    
1093 export MODORDER := $(extmod_prefix)modules.or    
1094 export MODULES_NSDEPS := $(extmod_prefix)modu    
1095                                                  
1096 ifeq ($(KBUILD_EXTMOD),)                         
1097                                                  
1098 build-dir       := .                             
1099 clean-dirs      := $(sort . Documentation \      
1100                      $(patsubst %/,%,$(filter    
1101                         $(drivers-) $(libs-))    
1102                                                  
1103 export ARCH_CORE        := $(core-y)             
1104 export ARCH_LIB         := $(filter %/, $(lib    
1105 export ARCH_DRIVERS     := $(drivers-y) $(dri    
1106 # Externally visible symbols (used by link-vm    
1107                                                  
1108 KBUILD_VMLINUX_OBJS := ./built-in.a              
1109 ifdef CONFIG_MODULES                             
1110 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a    
1111 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(lib    
1112 else                                             
1113 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a,    
1114 endif                                            
1115                                                  
1116 export KBUILD_VMLINUX_LIBS                       
1117 export KBUILD_LDS          := arch/$(SRCARCH)    
1118                                                  
1119 ifdef CONFIG_TRIM_UNUSED_KSYMS                   
1120 # For the kernel to actually contain only the    
1121 # we have to build modules as well to determi    
1122 KBUILD_MODULES := 1                              
1123 endif                                            
1124                                                  
1125 # '$(AR) mPi' needs 'T' to workaround the bug    
1126 quiet_cmd_ar_vmlinux.a = AR      $@              
1127       cmd_ar_vmlinux.a = \                       
1128         rm -f $@; \                              
1129         $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS    
1130         $(AR) mPiT $$($(AR) t $@ | sed -n 1p)    
1131                                                  
1132 targets += vmlinux.a                             
1133 vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/hea    
1134         $(call if_changed,ar_vmlinux.a)          
1135                                                  
1136 PHONY += vmlinux_o                               
1137 vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)      
1138         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1139                                                  
1140 vmlinux.o modules.builtin.modinfo modules.bui    
1141         @:                                       
1142                                                  
1143 PHONY += vmlinux                                 
1144 # LDFLAGS_vmlinux in the top Makefile defines    
1145 # not for decompressors. LDFLAGS_vmlinux in a    
1146 # unrelated; the decompressors just happen to    
1147 # arch/*/boot/compressed/vmlinux.                
1148 # Export LDFLAGS_vmlinux only to scripts/Make    
1149 #                                                
1150 # _LDFLAGS_vmlinux is a workaround for the 'p    
1151 #   https://savannah.gnu.org/bugs/?61463         
1152 # For Make > 4.4, the following simple code w    
1153 #  vmlinux: private export LDFLAGS_vmlinux :=    
1154 vmlinux: private _LDFLAGS_vmlinux := $(LDFLAG    
1155 vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_    
1156 vmlinux: vmlinux.o $(KBUILD_LDS) modpost         
1157         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1158                                                  
1159 # The actual objects are generated when desce    
1160 # make sure no implicit rule kicks in            
1161 $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $    
1162                                                  
1163 ifeq ($(origin KERNELRELEASE),file)              
1164 filechk_kernel.release = $(srctree)/scripts/s    
1165 else                                             
1166 filechk_kernel.release = echo $(KERNELRELEASE    
1167 endif                                            
1168                                                  
1169 # Store (new) KERNELRELEASE string in include    
1170 include/config/kernel.release: FORCE             
1171         $(call filechk,kernel.release)           
1172                                                  
1173 # Additional helpers built in scripts/           
1174 # Carefully list dependencies so we do not tr    
1175 # in parallel                                    
1176 PHONY += scripts                                 
1177 scripts: scripts_basic scripts_dtc               
1178         $(Q)$(MAKE) $(build)=$(@)                
1179                                                  
1180 # Things we need to do before we recursively     
1181 # or the modules are listed in "prepare".        
1182 # A multi level approach is used. prepareN is    
1183 # archprepare is used in arch Makefiles and w    
1184 # version.h and scripts_basic is processed /     
1185                                                  
1186 PHONY += prepare archprepare                     
1187                                                  
1188 archprepare: outputmakefile archheaders archs    
1189         asm-generic $(version_h) include/gene    
1190         include/generated/compile.h include/g    
1191                                                  
1192 prepare0: archprepare                            
1193         $(Q)$(MAKE) $(build)=scripts/mod         
1194         $(Q)$(MAKE) $(build)=. prepare           
1195                                                  
1196 # All the preparing..                            
1197 prepare: prepare0                                
1198 ifdef CONFIG_RUST                                
1199         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip    
1200         $(Q)$(MAKE) $(build)=rust                
1201 endif                                            
1202                                                  
1203 PHONY += remove-stale-files                      
1204 remove-stale-files:                              
1205         $(Q)$(srctree)/scripts/remove-stale-f    
1206                                                  
1207 # Support for using generic headers in asm-ge    
1208 asm-generic := -f $(srctree)/scripts/Makefile    
1209                                                  
1210 PHONY += asm-generic uapi-asm-generic            
1211 asm-generic: uapi-asm-generic                    
1212         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    
1213         generic=include/asm-generic              
1214 uapi-asm-generic:                                
1215         $(Q)$(MAKE) $(asm-generic)=arch/$(SRC    
1216         generic=include/uapi/asm-generic         
1217                                                  
1218 # Generate some files                            
1219 # -------------------------------------------    
1220                                                  
1221 # KERNELRELEASE can change from a few differe    
1222 # needs to be updated, so this check is force    
1223                                                  
1224 uts_len := 64                                    
1225 define filechk_utsrelease.h                      
1226         if [ `echo -n "$(KERNELRELEASE)" | wc    
1227           echo '"$(KERNELRELEASE)" exceeds $(    
1228           exit 1;                                
1229         fi;                                      
1230         echo \#define UTS_RELEASE \"$(KERNELR    
1231 endef                                            
1232                                                  
1233 define filechk_version.h                         
1234         if [ $(SUBLEVEL) -gt 255 ]; then         
1235                 echo \#define LINUX_VERSION_C    
1236                 expr $(VERSION) \* 65536 + $(    
1237         else                                     
1238                 echo \#define LINUX_VERSION_C    
1239                 expr $(VERSION) \* 65536 + $(    
1240         fi;                                      
1241         echo '#define KERNEL_VERSION(a,b,c) (    
1242         ((c) > 255 ? 255 : (c)))';               
1243         echo \#define LINUX_VERSION_MAJOR $(V    
1244         echo \#define LINUX_VERSION_PATCHLEVE    
1245         echo \#define LINUX_VERSION_SUBLEVEL     
1246 endef                                            
1247                                                  
1248 $(version_h): private PATCHLEVEL := $(or $(PA    
1249 $(version_h): private SUBLEVEL := $(or $(SUBL    
1250 $(version_h): FORCE                              
1251         $(call filechk,version.h)                
1252                                                  
1253 include/generated/utsrelease.h: include/confi    
1254         $(call filechk,utsrelease.h)             
1255                                                  
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                               
1263 headerdep:                                       
1264         $(Q)find $(srctree)/include/ -name '*    
1265         $(srctree)/scripts/headerdep.pl -I$(s    
1266                                                  
1267 # -------------------------------------------    
1268 # Kernel headers                                 
1269                                                  
1270 #Default location for installed headers          
1271 export INSTALL_HDR_PATH = $(objtree)/usr         
1272                                                  
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                                                  
1320 # -------------------------------------------    
1321 # Tools                                          
1322                                                  
1323 ifdef CONFIG_OBJTOOL                             
1324 prepare: tools/objtool                           
1325 endif                                            
1326                                                  
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                                                  
1363 # -------------------------------------------    
1364 # Kernel selftest                                
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                                                  
1421 endif                                            
1422                                                  
1423 PHONY += scripts_dtc                             
1424 scripts_dtc: scripts_basic                       
1425         $(Q)$(MAKE) $(build)=scripts/dtc         
1426                                                  
1427 ifneq ($(filter dt_binding_check, $(MAKECMDGO    
1428 export CHECK_DTBS=y                              
1429 endif                                            
1430                                                  
1431 PHONY += dt_binding_check dt_binding_schemas     
1432 dt_binding_check: dt_binding_schemas scripts_    
1433         $(Q)$(MAKE) $(build)=Documentation/de    
1434                                                  
1435 dt_binding_schemas:                              
1436         $(Q)$(MAKE) $(build)=Documentation/de    
1437                                                  
1438 PHONY += dt_compatible_check                     
1439 dt_compatible_check: dt_binding_schemas          
1440         $(Q)$(MAKE) $(build)=Documentation/de    
1441                                                  
1442 # -------------------------------------------    
1443 # Modules                                        
1444                                                  
1445 ifdef CONFIG_MODULES                             
1446                                                  
1447 # By default, build modules as well              
1448                                                  
1449 all: modules                                     
1450                                                  
1451 # When we're building modules with modversion    
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 #                                                
1460                                                  
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                                                  
1470 # Target to prepare building external modules    
1471 modules_prepare: prepare                         
1472         $(Q)$(MAKE) $(build)=scripts scripts/    
1473                                                  
1474 endif # CONFIG_MODULES                           
1475                                                  
1476 ###                                              
1477 # Cleaning is done on three levels.              
1478 # make clean     Delete most generated files     
1479 #                Leave enough to build extern    
1480 # make mrproper  Delete the current configura    
1481 # make distclean Remove editor backup files,     
1482                                                  
1483 # Directories & files removed with 'make clea    
1484 CLEAN_FILES += vmlinux.symvers modules-only.s    
1485                modules.builtin modules.builti    
1486                compile_commands.json rust/tes    
1487                rust-project.json .vmlinux.obj    
1488                                                  
1489 # Directories & files removed with 'make mrpr    
1490 MRPROPER_FILES += include/config include/gene    
1491                   arch/$(SRCARCH)/include/gen    
1492                   debian snap tar-install PKG    
1493                   .config .config.old .versio    
1494                   Module.symvers \               
1495                   certs/signing_key.pem \        
1496                   certs/x509.genkey \            
1497                   vmlinux-gdb.py \               
1498                   rpmbuild \                     
1499                   rust/libmacros.so              
1500                                                  
1501 # clean - Delete most, but leave enough to bu    
1502 #                                                
1503 clean: private rm-files := $(CLEAN_FILES)        
1504                                                  
1505 PHONY += archclean vmlinuxclean                  
1506                                                  
1507 vmlinuxclean:                                    
1508         $(Q)$(CONFIG_SHELL) $(srctree)/script    
1509         $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f    
1510                                                  
1511 clean: archclean vmlinuxclean resolve_btfids_    
1512                                                  
1513 # mrproper - Delete all generated files, incl    
1514 #                                                
1515 mrproper: private rm-files := $(MRPROPER_FILE    
1516 mrproper-dirs      := $(addprefix _mrproper_,    
1517                                                  
1518 PHONY += $(mrproper-dirs) mrproper               
1519 $(mrproper-dirs):                                
1520         $(Q)$(MAKE) $(clean)=$(patsubst _mrpr    
1521                                                  
1522 mrproper: clean $(mrproper-dirs)                 
1523         $(call cmd,rmfiles)                      
1524         @find . $(RCS_FIND_IGNORE) \             
1525                 \( -name '*.rmeta' \) \          
1526                 -type f -print | xargs rm -f     
1527                                                  
1528 # distclean                                      
1529 #                                                
1530 PHONY += distclean                               
1531                                                  
1532 distclean: mrproper                              
1533         @find . $(RCS_FIND_IGNORE) \             
1534                 \( -name '*.orig' -o -name '*    
1535                 -o -name '*.bak' -o -name '#*    
1536                 -o -name 'core' -o -name tags    
1537                 -o -name GPATH -o -name GRTAG    
1538                 -type f -print | xargs rm -f     
1539                                                  
1540                                                  
1541 # Packaging of the kernel to various formats     
1542 # -------------------------------------------    
1543                                                  
1544 %src-pkg: FORCE                                  
1545         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1546 %pkg: include/config/kernel.release FORCE        
1547         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1548                                                  
1549 # Brief documentation of the typical targets     
1550 # -------------------------------------------    
1551                                                  
1552 boards := $(wildcard $(srctree)/arch/$(SRCARC    
1553 boards := $(sort $(notdir $(boards)))            
1554 board-dirs := $(dir $(wildcard $(srctree)/arc    
1555 board-dirs := $(sort $(notdir $(board-dirs:/=    
1556                                                  
1557 PHONY += help                                    
1558 help:                                            
1559         @echo  'Cleaning targets:'               
1560         @echo  '  clean           - Remove mo    
1561         @echo  '                    enough bu    
1562         @echo  '  mrproper        - Remove al    
1563         @echo  '  distclean       - mrproper     
1564         @echo  ''                                
1565         @$(MAKE) -f $(srctree)/scripts/kconfi    
1566         @echo  ''                                
1567         @echo  'Other generic targets:'          
1568         @echo  '  all             - Build all    
1569         @echo  '* vmlinux         - Build the    
1570         @echo  '* modules         - Build all    
1571         @echo  '  modules_install - Install a    
1572         @echo  '  vdso_install    - Install u    
1573         @echo  '  dir/            - Build all    
1574         @echo  '  dir/file.[ois]  - Build spe    
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    
1580         @echo  '  modules_prepare - Set up fo    
1581         @echo  '  tags/TAGS       - Generate     
1582         @echo  '  cscope          - Generate     
1583         @echo  '  gtags           - Generate     
1584         @echo  '  kernelrelease   - Output th    
1585         @echo  '  kernelversion   - Output th    
1586         @echo  '  image_name      - Output th    
1587         @echo  '  headers_install - Install s    
1588          echo  '                    (default:    
1589          echo  ''                                
1590         @echo  'Static analysers:'               
1591         @echo  '  checkstack      - Generate     
1592         @echo  '                    with a st    
1593         @echo  '  versioncheck    - Sanity ch    
1594         @echo  '  includecheck    - Check for    
1595         @echo  '  export_report   - List the     
1596         @echo  '  headerdep       - Detect in    
1597         @echo  '  coccicheck      - Check wit    
1598         @echo  '  clang-analyzer  - Check wit    
1599         @echo  '  clang-tidy      - Check wit    
1600         @echo  ''                                
1601         @echo  'Tools:'                          
1602         @echo  '  nsdeps          - Generate     
1603         @echo  ''                                
1604         @echo  'Kernel selftest:'                
1605         @echo  '  kselftest         - Build a    
1606         @echo  '                      Build,     
1607         @echo  '                      running    
1608         @echo  '                      Run as     
1609         @echo  '  kselftest-all     - Build k    
1610         @echo  '  kselftest-install - Build a    
1611         @echo  '  kselftest-clean   - Remove     
1612         @echo  '  kselftest-merge   - Merge a    
1613         @echo  '                      kselfte    
1614         @echo  ''                                
1615         @echo  'Rust targets:'                   
1616         @echo  '  rustavailable   - Checks wh    
1617         @echo  '                    available    
1618         @echo  '  rustfmt         - Reformat     
1619         @echo  '  rustfmtcheck    - Checks if    
1620         @echo  '                    is format    
1621         @echo  '  rustdoc         - Generate     
1622         @echo  '                    (requires    
1623         @echo  '  rusttest        - Runs the     
1624         @echo  '                    (requires    
1625         @echo  '  rust-analyzer   - Generate     
1626         @echo  '                    (requires    
1627         @echo  '  dir/file.[os]   - Build spe    
1628         @echo  '  dir/file.rsi    - Build mac    
1629         @echo  '                    Run with     
1630         @echo  '                    The outpu    
1631         @echo  '  dir/file.ll     - Build the    
1632         @echo  ''                                
1633         @$(if $(dtstree), \                      
1634                 echo 'Devicetree:'; \            
1635                 echo '* dtbs               -     
1636                 echo '  dtbs_install       -     
1637                 echo '  dt_binding_check   -     
1638                 echo '  dt_binding_schema  -     
1639                 echo '  dtbs_check         -     
1640                 echo '')                         
1641                                                  
1642         @echo 'Userspace tools targets:'         
1643         @echo '  use "make tools/help"'          
1644         @echo '  or  "cd tools; make help"'      
1645         @echo  ''                                
1646         @echo  'Kernel packaging:'               
1647         @$(MAKE) -f $(srctree)/scripts/Makefi    
1648         @echo  ''                                
1649         @echo  'Documentation targets:'          
1650         @$(MAKE) -f $(srctree)/Documentation/    
1651         @echo  ''                                
1652         @echo  'Architecture-specific targets    
1653         @$(or $(archhelp),\                      
1654                 echo '  No architecture-speci    
1655         @echo  ''                                
1656         @$(if $(boards), \                       
1657                 $(foreach b, $(boards), \        
1658                 printf "  %-27s - Build for %    
1659                 echo '')                         
1660         @$(if $(board-dirs), \                   
1661                 $(foreach b, $(board-dirs), \    
1662                 printf "  %-16s - Show %s-spe    
1663                 printf "  %-16s - Show all of    
1664                 echo '')                         
1665                                                  
1666         @echo  '  make V=n   [targets] 1: ver    
1667         @echo  '                       2: giv    
1668         @echo  '                       V=1 an    
1669         @echo  '  make O=dir [targets] Locate    
1670         @echo  '  make C=1   [targets] Check     
1671         @echo  '                       (spars    
1672         @echo  '  make C=2   [targets] Force     
1673         @echo  '  make RECORDMCOUNT_WARN=1 [t    
1674         @echo  '  make W=n   [targets] Enable    
1675         @echo  '                1: warnings w    
1676         @echo  '                2: warnings w    
1677         @echo  '                3: more obscu    
1678         @echo  '                c: extra chec    
1679         @echo  '                e: warnings a    
1680         @echo  '                Multiple leve    
1681         @$(if $(dtstree), \                      
1682                 echo '  make CHECK_DTBS=1 [ta    
1683                 echo '         This can be ap    
1684                 )                                
1685         @echo  ''                                
1686         @echo  'Execute "make" or "make all"     
1687         @echo  'For further info see the ./RE    
1688                                                  
1689                                                  
1690 help-board-dirs := $(addprefix help-,$(board-    
1691                                                  
1692 help-boards: $(help-board-dirs)                  
1693                                                  
1694 boards-per-dir = $(sort $(notdir $(wildcard $    
1695                                                  
1696 $(help-board-dirs): help-%:                      
1697         @echo  'Architecture-specific targets    
1698         @$(if $(boards-per-dir), \               
1699                 $(foreach b, $(boards-per-dir    
1700                 printf "  %-24s - Build for %    
1701                 echo '')                         
1702                                                  
1703                                                  
1704 # Documentation targets                          
1705 # -------------------------------------------    
1706 DOC_TARGETS := xmldocs latexdocs pdfdocs html    
1707                linkcheckdocs dochelp refcheck    
1708 PHONY += $(DOC_TARGETS)                          
1709 $(DOC_TARGETS):                                  
1710         $(Q)$(MAKE) $(build)=Documentation $@    
1711                                                  
1712                                                  
1713 # Rust targets                                   
1714 # -------------------------------------------    
1715                                                  
1716 # "Is Rust available?" target                    
1717 PHONY += rustavailable                           
1718 rustavailable:                                   
1719         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip    
1720                                                  
1721 # Documentation target                           
1722 #                                                
1723 # Using the singular to avoid running afoul o    
1724 PHONY += rustdoc                                 
1725 rustdoc: prepare                                 
1726         $(Q)$(MAKE) $(build)=rust $@             
1727                                                  
1728 # Testing target                                 
1729 PHONY += rusttest                                
1730 rusttest: prepare                                
1731         $(Q)$(MAKE) $(build)=rust $@             
1732                                                  
1733 # Formatting targets                             
1734 PHONY += rustfmt rustfmtcheck                    
1735                                                  
1736 # We skip `rust/alloc` since we want to minim    
1737 #                                                
1738 # We match using absolute paths since `find`     
1739 # when matching, which is a problem when e.g.    
1740 # We `grep` afterwards in order to remove the    
1741 rustfmt:                                         
1742         $(Q)find $(abs_srctree) -type f -name    
1743                 -o -path $(abs_srctree)/rust/    
1744                 -o -path $(abs_objtree)/rust/    
1745                 | grep -Fv $(abs_srctree)/rus    
1746                 | grep -Fv $(abs_objtree)/rus    
1747                 | grep -Fv generated \           
1748                 | xargs $(RUSTFMT) $(rustfmt_    
1749                                                  
1750 rustfmtcheck: rustfmt_flags = --check            
1751 rustfmtcheck: rustfmt                            
1752                                                  
1753 # Misc                                           
1754 # -------------------------------------------    
1755                                                  
1756 PHONY += misc-check                              
1757 misc-check:                                      
1758         $(Q)$(srctree)/scripts/misc-check        
1759                                                  
1760 all: misc-check                                  
1761                                                  
1762 PHONY += scripts_gdb                             
1763 scripts_gdb: prepare0                            
1764         $(Q)$(MAKE) $(build)=scripts/gdb         
1765         $(Q)ln -fsn $(abspath $(srctree)/scri    
1766                                                  
1767 ifdef CONFIG_GDB_SCRIPTS                         
1768 all: scripts_gdb                                 
1769 endif                                            
1770                                                  
1771 else # KBUILD_EXTMOD                             
1772                                                  
1773 filechk_kernel.release = echo $(KERNELRELEASE    
1774                                                  
1775 ###                                              
1776 # External module support.                       
1777 # When building external modules the kernel u    
1778 # read-only, and no consistency checks are ma    
1779 # system is not used on the basis kernel. If     
1780 # in the basis kernel ordinary make commands     
1781                                                  
1782 # We are always building only modules.           
1783 KBUILD_BUILTIN :=                                
1784 KBUILD_MODULES := 1                              
1785                                                  
1786 build-dir := $(KBUILD_EXTMOD)                    
1787                                                  
1788 compile_commands.json: $(extmod_prefix)compil    
1789 PHONY += compile_commands.json                   
1790                                                  
1791 clean-dirs := $(KBUILD_EXTMOD)                   
1792 clean: private rm-files := $(KBUILD_EXTMOD)/M    
1793         $(KBUILD_EXTMOD)/compile_commands.jso    
1794                                                  
1795 PHONY += prepare                                 
1796 # now expand this into a simple variable to r    
1797 prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT    
1798 prepare:                                         
1799         @if [ "$(CC_VERSION_TEXT)" != "$(CONF    
1800                 echo >&2 "warning: the compil    
1801                 echo >&2 "  The kernel was bu    
1802                 echo >&2 "  You are using:       
1803         fi                                       
1804                                                  
1805 PHONY += help                                    
1806 help:                                            
1807         @echo  '  Building external modules.'    
1808         @echo  '  Syntax: make -C path/to/ker    
1809         @echo  ''                                
1810         @echo  '  modules         - default t    
1811         @echo  '  modules_install - install t    
1812         @echo  '  clean           - remove ge    
1813         @echo  '  rust-analyzer   - generate     
1814         @echo  ''                                
1815                                                  
1816 ifndef CONFIG_MODULES                            
1817 modules modules_install: __external_modules_e    
1818 __external_modules_error:                        
1819         @echo >&2 '***'                          
1820         @echo >&2 '*** The present kernel dis    
1821         @echo >&2 '*** You cannot build or in    
1822         @echo >&2 '***'                          
1823         @false                                   
1824 endif                                            
1825                                                  
1826 endif # KBUILD_EXTMOD                            
1827                                                  
1828 # -------------------------------------------    
1829 # Modules                                        
1830                                                  
1831 PHONY += modules modules_install modules_sign    
1832                                                  
1833 modules_install:                                 
1834         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1835         sign-only=$(if $(filter modules_insta    
1836                                                  
1837 ifeq ($(CONFIG_MODULE_SIG),y)                    
1838 # modules_sign is a subset of modules_install    
1839 # 'make modules_install modules_sign' is equi    
1840 modules_sign: modules_install                    
1841         @:                                       
1842 else                                             
1843 modules_sign:                                    
1844         @echo >&2 '***'                          
1845         @echo >&2 '*** CONFIG_MODULE_SIG is d    
1846         @echo >&2 '***'                          
1847         @false                                   
1848 endif                                            
1849                                                  
1850 ifdef CONFIG_MODULES                             
1851                                                  
1852 $(MODORDER): $(build-dir)                        
1853         @:                                       
1854                                                  
1855 # KBUILD_MODPOST_NOFINAL can be set to skip t    
1856 # This is solely useful to speed up test comp    
1857 modules: modpost                                 
1858 ifneq ($(KBUILD_MODPOST_NOFINAL),1)              
1859         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1860 endif                                            
1861                                                  
1862 PHONY += modules_check                           
1863 modules_check: $(MODORDER)                       
1864         $(Q)$(CONFIG_SHELL) $(srctree)/script    
1865                                                  
1866 else # CONFIG_MODULES                            
1867                                                  
1868 modules:                                         
1869         @:                                       
1870                                                  
1871 KBUILD_MODULES :=                                
1872                                                  
1873 endif # CONFIG_MODULES                           
1874                                                  
1875 PHONY += modpost                                 
1876 modpost: $(if $(single-build),, $(if $(KBUILD    
1877          $(if $(KBUILD_MODULES), modules_chec    
1878         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1879                                                  
1880 # Single targets                                 
1881 # -------------------------------------------    
1882 # To build individual files in subdirectories    
1883 #                                                
1884 #   make foo/bar/baz.s                           
1885 #                                                
1886 # The supported suffixes for single-target ar    
1887 #                                                
1888 # To build only under specific subdirectories    
1889 #                                                
1890 #   make foo/bar/baz/                            
1891                                                  
1892 ifdef single-build                               
1893                                                  
1894 # .ko is special because modpost is needed       
1895 single-ko := $(sort $(filter %.ko, $(MAKECMDG    
1896 single-no-ko := $(filter-out $(single-ko), $(    
1897                 $(foreach x, o mod, $(patsubs    
1898                                                  
1899 $(single-ko): single_modules                     
1900         @:                                       
1901 $(single-no-ko): $(build-dir)                    
1902         @:                                       
1903                                                  
1904 # Remove MODORDER when done because it is not    
1905 PHONY += single_modules                          
1906 single_modules: $(single-no-ko) modules_prepa    
1907         $(Q){ $(foreach m, $(single-ko), echo    
1908         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1909 ifneq ($(KBUILD_MODPOST_NOFINAL),1)              
1910         $(Q)$(MAKE) -f $(srctree)/scripts/Mak    
1911 endif                                            
1912         $(Q)rm -f $(MODORDER)                    
1913                                                  
1914 single-goals := $(addprefix $(build-dir)/, $(    
1915                                                  
1916 KBUILD_MODULES := 1                              
1917                                                  
1918 endif                                            
1919                                                  
1920 # Preset locale variables to speed up the bui    
1921 # tweaks to this spot to avoid wrong language    
1922 # make menuconfig etc.                           
1923 # Error messages still appears in the origina    
1924 PHONY += $(build-dir)                            
1925 $(build-dir): prepare                            
1926         $(Q)$(MAKE) $(build)=$@ need-builtin=    
1927                                                  
1928 clean-dirs := $(addprefix _clean_, $(clean-di    
1929 PHONY += $(clean-dirs) clean                     
1930 $(clean-dirs):                                   
1931         $(Q)$(MAKE) $(clean)=$(patsubst _clea    
1932                                                  
1933 clean: $(clean-dirs)                             
1934         $(call cmd,rmfiles)                      
1935         @find $(or $(KBUILD_EXTMOD), .) $(RCS    
1936                 \( -name '*.[aios]' -o -name     
1937                 -o -name '*.ko.*' \              
1938                 -o -name '*.dtb' -o -name '*.    
1939                 -o -name '*.dtb.S' -o -name '    
1940                 -o -name '*.dt.yaml' -o -name    
1941                 -o -name '*.dwo' -o -name '*.    
1942                 -o -name '*.su' -o -name '*.m    
1943                 -o -name '.*.d' -o -name '.*.    
1944                 -o -name '*.lex.c' -o -name '    
1945                 -o -name '*.asn1.[ch]' \         
1946                 -o -name '*.symtypes' -o -nam    
1947                 -o -name '*.c.[012]*.*' \        
1948                 -o -name '*.ll' \                
1949                 -o -name '*.gcno' \              
1950                 -o -name '*.*.symversions' \)    
1951                 -o -name '.tmp_*' -print \       
1952                 | xargs rm -rf                   
1953                                                  
1954 # Generate tags for editors                      
1955 # -------------------------------------------    
1956 quiet_cmd_tags = GEN     $@                      
1957       cmd_tags = $(BASH) $(srctree)/scripts/t    
1958                                                  
1959 tags TAGS cscope gtags: FORCE                    
1960         $(call cmd,tags)                         
1961                                                  
1962 # Generate rust-project.json (a file that des    
1963 # Rust projects) for rust-analyzer (an implem    
1964 # Protocol).                                     
1965 PHONY += rust-analyzer                           
1966 rust-analyzer:                                   
1967         +$(Q)$(CONFIG_SHELL) $(srctree)/scrip    
1968         $(Q)$(MAKE) $(build)=rust $@             
1969                                                  
1970 # Script to generate missing namespace depend    
1971 # -------------------------------------------    
1972                                                  
1973 PHONY += nsdeps                                  
1974 nsdeps: export KBUILD_NSDEPS=1                   
1975 nsdeps: modules                                  
1976         $(Q)$(CONFIG_SHELL) $(srctree)/script    
1977                                                  
1978 # Clang Tooling                                  
1979 # -------------------------------------------    
1980                                                  
1981 quiet_cmd_gen_compile_commands = GEN     $@      
1982       cmd_gen_compile_commands = $(PYTHON3) $    
1983                                                  
1984 $(extmod_prefix)compile_commands.json: $(srct    
1985         $(if $(KBUILD_EXTMOD),, vmlinux.a $(K    
1986         $(if $(CONFIG_MODULES), $(MODORDER))     
1987         $(call if_changed,gen_compile_command    
1988                                                  
1989 targets += $(extmod_prefix)compile_commands.j    
1990                                                  
1991 PHONY += clang-tidy clang-analyzer               
1992                                                  
1993 ifdef CONFIG_CC_IS_CLANG                         
1994 quiet_cmd_clang_tools = CHECK   $<               
1995       cmd_clang_tools = $(PYTHON3) $(srctree)    
1996                                                  
1997 clang-tidy clang-analyzer: $(extmod_prefix)co    
1998         $(call cmd,clang_tools)                  
1999 else                                             
2000 clang-tidy clang-analyzer:                       
2001         @echo "$@ requires CC=clang" >&2         
2002         @false                                   
2003 endif                                            
2004                                                  
2005 # Scripts to check various things for consist    
2006 # -------------------------------------------    
2007                                                  
2008 PHONY += includecheck versioncheck coccicheck    
2009                                                  
2010 includecheck:                                    
2011         find $(srctree)/* $(RCS_FIND_IGNORE)     
2012                 -name '*.[hcS]' -type f -prin    
2013                 | xargs $(PERL) -w $(srctree)    
2014                                                  
2015 versioncheck:                                    
2016         find $(srctree)/* $(RCS_FIND_IGNORE)     
2017                 -name '*.[hcS]' -type f -prin    
2018                 | xargs $(PERL) -w $(srctree)    
2019                                                  
2020 coccicheck:                                      
2021         $(Q)$(BASH) $(srctree)/scripts/$@        
2022                                                  
2023 export_report:                                   
2024         $(PERL) $(srctree)/scripts/export_rep    
2025                                                  
2026 PHONY += checkstack kernelrelease kernelversi    
2027                                                  
2028 # UML needs a little special treatment here.     
2029 # toolchain, so needs $(SUBARCH) passed to ch    
2030 # else wants $(ARCH), including people doing     
2031 # that $(SUBARCH) doesn't work here.             
2032 ifeq ($(ARCH), um)                               
2033 CHECKSTACK_ARCH := $(SUBARCH)                    
2034 else                                             
2035 CHECKSTACK_ARCH := $(ARCH)                       
2036 endif                                            
2037 MINSTACKSIZE    ?= 100                           
2038 checkstack:                                      
2039         $(OBJDUMP) -d vmlinux $$(find . -name    
2040         $(PERL) $(srctree)/scripts/checkstack    
2041                                                  
2042 kernelrelease:                                   
2043         @$(filechk_kernel.release)               
2044                                                  
2045 kernelversion:                                   
2046         @echo $(KERNELVERSION)                   
2047                                                  
2048 image_name:                                      
2049         @echo $(KBUILD_IMAGE)                    
2050                                                  
2051 PHONY += run-command                             
2052 run-command:                                     
2053         $(Q)$(KBUILD_RUN_COMMAND)                
2054                                                  
2055 quiet_cmd_rmfiles = $(if $(wildcard $(rm-file    
2056       cmd_rmfiles = rm -rf $(rm-files)           
2057                                                  
2058 # read saved command lines for existing targe    
2059 existing-targets := $(wildcard $(sort $(targe    
2060                                                  
2061 -include $(foreach f,$(existing-targets),$(di    
2062                                                  
2063 endif # config-build                             
2064 endif # mixed-build                              
2065 endif # need-sub-make                            
2066                                                  
2067 PHONY += FORCE                                   
2068 FORCE:                                           
2069                                                  
2070 # Declare the contents of the PHONY variable     
2071 # information in a variable so we can use it     
2072 .PHONY: $(PHONY)                                 
                                                      

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