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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | VERSION = 5 | |
3 | PATCHLEVEL = 3 | |
4 | SUBLEVEL = 0 | |
5 | EXTRAVERSION = -rc4 | |
6 | NAME = Bobtail Squid | |
7 | ||
8 | # *DOCUMENTATION* | |
9 | # To see a list of typical targets execute "make help" | |
10 | # More info can be located in ./README | |
11 | # Comments in this file are targeted only to the developer, do not | |
12 | # expect to learn how to build the kernel reading this file. | |
13 | ||
14 | # That's our default target when none is given on the command line | |
15 | PHONY := _all | |
16 | _all: | |
17 | ||
18 | # We are using a recursive build, so we need to do a little thinking | |
19 | # to get the ordering right. | |
20 | # | |
21 | # Most importantly: sub-Makefiles should only ever modify files in | |
22 | # their own directory. If in some directory we have a dependency on | |
23 | # a file in another dir (which doesn't happen often, but it's often | |
24 | # unavoidable when linking the built-in.a targets which finally | |
25 | # turn into vmlinux), we will call a sub make in that other dir, and | |
26 | # after that we are sure that everything which is in that other dir | |
27 | # is now up to date. | |
28 | # | |
29 | # The only cases where we need to modify files which have global | |
30 | # effects are thus separated out and done before the recursive | |
31 | # descending is started. They are now explicitly listed as the | |
32 | # prepare rule. | |
33 | ||
34 | ifneq ($(sub_make_done),1) | |
35 | ||
36 | # Do not use make's built-in rules and variables | |
37 | # (this increases performance and avoids hard-to-debug behaviour) | |
38 | MAKEFLAGS += -rR | |
39 | ||
40 | # Avoid funny character set dependencies | |
41 | unexport LC_ALL | |
42 | LC_COLLATE=C | |
43 | LC_NUMERIC=C | |
44 | export LC_COLLATE LC_NUMERIC | |
45 | ||
46 | # Avoid interference with shell env settings | |
47 | unexport GREP_OPTIONS | |
48 | ||
49 | # Beautify output | |
50 | # --------------------------------------------------------------------------- | |
51 | # | |
52 | # Normally, we echo the whole command before executing it. By making | |
53 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
54 | # $(quiet) to choose other forms of output instead, e.g. | |
55 | # | |
56 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
57 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
58 | # | |
59 | # If $(quiet) is empty, the whole command will be printed. | |
60 | # If it is set to "quiet_", only the short version will be printed. | |
61 | # If it is set to "silent_", nothing will be printed at all, since | |
62 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
63 | # | |
64 | # A simple variant is to prefix commands with $(Q) - that's useful | |
65 | # for commands that shall be hidden in non-verbose mode. | |
66 | # | |
67 | # $(Q)ln $@ :< | |
68 | # | |
69 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
70 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
71 | # | |
72 | # To put more focus on warnings, be less verbose as default | |
73 | # Use 'make V=1' to see the full commands | |
74 | ||
75 | ifeq ("$(origin V)", "command line") | |
76 | KBUILD_VERBOSE = $(V) | |
77 | endif | |
78 | ifndef KBUILD_VERBOSE | |
79 | KBUILD_VERBOSE = 0 | |
80 | endif | |
81 | ||
82 | ifeq ($(KBUILD_VERBOSE),1) | |
83 | quiet = | |
84 | Q = | |
85 | else | |
86 | quiet=quiet_ | |
87 | Q = @ | |
88 | endif | |
89 | ||
90 | # If the user is running make -s (silent mode), suppress echoing of | |
91 | # commands | |
92 | ||
93 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) | |
94 | quiet=silent_ | |
95 | endif | |
96 | ||
97 | export quiet Q KBUILD_VERBOSE | |
98 | ||
99 | # Kbuild will save output files in the current working directory. | |
100 | # This does not need to match to the root of the kernel source tree. | |
101 | # | |
102 | # For example, you can do this: | |
103 | # | |
104 | # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile | |
105 | # | |
106 | # If you want to save output files in a different location, there are | |
107 | # two syntaxes to specify it. | |
108 | # | |
109 | # 1) O= | |
110 | # Use "make O=dir/to/store/output/files/" | |
111 | # | |
112 | # 2) Set KBUILD_OUTPUT | |
113 | # Set the environment variable KBUILD_OUTPUT to point to the output directory. | |
114 | # export KBUILD_OUTPUT=dir/to/store/output/files/; make | |
115 | # | |
116 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
117 | # variable. | |
118 | ||
119 | # Do we want to change the working directory? | |
120 | ifeq ("$(origin O)", "command line") | |
121 | KBUILD_OUTPUT := $(O) | |
122 | endif | |
123 | ||
124 | ifneq ($(KBUILD_OUTPUT),) | |
125 | # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot | |
126 | # expand a shell special character '~'. We use a somewhat tedious way here. | |
127 | abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) | |
128 | $(if $(abs_objtree),, \ | |
129 | $(error failed to create output directory "$(KBUILD_OUTPUT)")) | |
130 | ||
131 | # $(realpath ...) resolves symlinks | |
132 | abs_objtree := $(realpath $(abs_objtree)) | |
133 | else | |
134 | abs_objtree := $(CURDIR) | |
135 | endif # ifneq ($(KBUILD_OUTPUT),) | |
136 | ||
137 | ifeq ($(abs_objtree),$(CURDIR)) | |
138 | # Suppress "Entering directory ..." unless we are changing the work directory. | |
139 | MAKEFLAGS += --no-print-directory | |
140 | else | |
141 | need-sub-make := 1 | |
142 | endif | |
143 | ||
144 | abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) | |
145 | ||
146 | ifneq ($(words $(subst :, ,$(abs_srctree))), 1) | |
147 | $(error source directory cannot contain spaces or colons) | |
148 | endif | |
149 | ||
150 | ifneq ($(abs_srctree),$(abs_objtree)) | |
151 | # Look for make include files relative to root of kernel src | |
152 | # | |
153 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
154 | # once after the Makefile is read. We need to invoke sub-make. | |
155 | MAKEFLAGS += --include-dir=$(abs_srctree) | |
156 | need-sub-make := 1 | |
157 | endif | |
158 | ||
159 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) | |
160 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
161 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
162 | need-sub-make := 1 | |
163 | # Cancel implicit rules for this Makefile. | |
164 | $(lastword $(MAKEFILE_LIST)): ; | |
165 | endif | |
166 | ||
167 | export abs_srctree abs_objtree | |
168 | export sub_make_done := 1 | |
169 | ||
170 | ifeq ($(need-sub-make),1) | |
171 | ||
172 | PHONY += $(MAKECMDGOALS) sub-make | |
173 | ||
174 | $(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make | |
175 | @: | |
176 | ||
177 | # Invoke a second make in the output directory, passing relevant variables | |
178 | sub-make: | |
179 | $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) | |
180 | ||
181 | endif # need-sub-make | |
182 | endif # sub_make_done | |
183 | ||
184 | # We process the rest of the Makefile if this is the final invocation of make | |
185 | ifeq ($(need-sub-make),) | |
186 | ||
187 | # Do not print "Entering directory ...", | |
188 | # but we want to display it when entering to the output directory | |
189 | # so that IDEs/editors are able to understand relative filenames. | |
190 | MAKEFLAGS += --no-print-directory | |
191 | ||
192 | # Call a source code checker (by default, "sparse") as part of the | |
193 | # C compilation. | |
194 | # | |
195 | # Use 'make C=1' to enable checking of only re-compiled files. | |
196 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
197 | # of whether they are re-compiled or not. | |
198 | # | |
199 | # See the file "Documentation/dev-tools/sparse.rst" for more details, | |
200 | # including where to get the "sparse" utility. | |
201 | ||
202 | ifeq ("$(origin C)", "command line") | |
203 | KBUILD_CHECKSRC = $(C) | |
204 | endif | |
205 | ifndef KBUILD_CHECKSRC | |
206 | KBUILD_CHECKSRC = 0 | |
207 | endif | |
208 | ||
209 | # Use make M=dir to specify directory of external module to build | |
210 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
211 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
212 | ifdef SUBDIRS | |
213 | $(warning ================= WARNING ================) | |
214 | $(warning 'SUBDIRS' will be removed after Linux 5.3) | |
215 | $(warning ) | |
216 | $(warning If you are building an individual subdirectory) | |
217 | $(warning in the kernel tree, you can do like this:) | |
218 | $(warning $$ make path/to/dir/you/want/to/build/) | |
219 | $(warning (Do not forget the trailing slash)) | |
220 | $(warning ) | |
221 | $(warning If you are building an external module,) | |
222 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) | |
223 | $(warning ==========================================) | |
224 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
225 | endif | |
226 | ||
227 | ifeq ("$(origin M)", "command line") | |
228 | KBUILD_EXTMOD := $(M) | |
229 | endif | |
230 | ||
231 | export KBUILD_CHECKSRC KBUILD_EXTMOD | |
232 | ||
233 | extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) | |
234 | ||
235 | ifeq ($(abs_srctree),$(abs_objtree)) | |
236 | # building in the source tree | |
237 | srctree := . | |
238 | building_out_of_srctree := | |
239 | else | |
240 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) | |
241 | # building in a subdirectory of the source tree | |
242 | srctree := .. | |
243 | else | |
244 | srctree := $(abs_srctree) | |
245 | endif | |
246 | building_out_of_srctree := 1 | |
247 | endif | |
248 | ||
249 | ifneq ($(KBUILD_ABS_SRCTREE),) | |
250 | srctree := $(abs_srctree) | |
251 | endif | |
252 | ||
253 | objtree := . | |
254 | VPATH := $(srctree) | |
255 | ||
256 | export building_out_of_srctree srctree objtree VPATH | |
257 | ||
258 | # To make sure we do not include .config for any of the *config targets | |
259 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
260 | # It is allowed to specify more targets when calling make, including | |
261 | # mixing *config targets and build targets. | |
262 | # For example 'make oldconfig all'. | |
263 | # Detect when mixed targets is specified, and make a second invocation | |
264 | # of make so .config is not included in this case either (for *config). | |
265 | ||
266 | version_h := include/generated/uapi/linux/version.h | |
267 | old_version_h := include/linux/version.h | |
268 | ||
269 | clean-targets := %clean mrproper cleandocs | |
270 | no-dot-config-targets := $(clean-targets) \ | |
271 | cscope gtags TAGS tags help% %docs check% coccicheck \ | |
272 | $(version_h) headers headers_% archheaders archscripts \ | |
273 | %asm-generic kernelversion %src-pkg | |
274 | no-sync-config-targets := $(no-dot-config-targets) install %install \ | |
275 | kernelrelease | |
276 | single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ | |
277 | ||
278 | config-build := | |
279 | mixed-build := | |
280 | need-config := 1 | |
281 | may-sync-config := 1 | |
282 | single-build := | |
283 | ||
284 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
285 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
286 | need-config := | |
287 | endif | |
288 | endif | |
289 | ||
290 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
291 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
292 | may-sync-config := | |
293 | endif | |
294 | endif | |
295 | ||
296 | ifneq ($(KBUILD_EXTMOD),) | |
297 | may-sync-config := | |
298 | endif | |
299 | ||
300 | ifeq ($(KBUILD_EXTMOD),) | |
301 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
302 | config-build := 1 | |
303 | ifneq ($(words $(MAKECMDGOALS)),1) | |
304 | mixed-build := 1 | |
305 | endif | |
306 | endif | |
307 | endif | |
308 | ||
309 | # We cannot build single targets and the others at the same time | |
310 | ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) | |
311 | single-build := 1 | |
312 | ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) | |
313 | mixed-build := 1 | |
314 | endif | |
315 | endif | |
316 | ||
317 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
318 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
319 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
320 | mixed-build := 1 | |
321 | endif | |
322 | endif | |
323 | ||
324 | # install and modules_install need also be processed one by one | |
325 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
326 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
327 | mixed-build := 1 | |
328 | endif | |
329 | endif | |
330 | ||
331 | ifdef mixed-build | |
332 | # =========================================================================== | |
333 | # We're called with mixed targets (*config and build targets). | |
334 | # Handle them one by one. | |
335 | ||
336 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
337 | ||
338 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
339 | @: | |
340 | ||
341 | __build_one_by_one: | |
342 | $(Q)set -e; \ | |
343 | for i in $(MAKECMDGOALS); do \ | |
344 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
345 | done | |
346 | ||
347 | else # !mixed-build | |
348 | ||
349 | include scripts/Kbuild.include | |
350 | ||
351 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
352 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
353 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
354 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
355 | ||
356 | include scripts/subarch.include | |
357 | ||
358 | # Cross compiling and selecting different set of gcc/bin-utils | |
359 | # --------------------------------------------------------------------------- | |
360 | # | |
361 | # When performing cross compilation for other architectures ARCH shall be set | |
362 | # to the target architecture. (See arch/* for the possibilities). | |
363 | # ARCH can be set during invocation of make: | |
364 | # make ARCH=ia64 | |
365 | # Another way is to have ARCH set in the environment. | |
366 | # The default ARCH is the host where make is executed. | |
367 | ||
368 | # CROSS_COMPILE specify the prefix used for all executables used | |
369 | # during compilation. Only gcc and related bin-utils executables | |
370 | # are prefixed with $(CROSS_COMPILE). | |
371 | # CROSS_COMPILE can be set on the command line | |
372 | # make CROSS_COMPILE=ia64-linux- | |
373 | # Alternatively CROSS_COMPILE can be set in the environment. | |
374 | # Default value for CROSS_COMPILE is not to prefix executables | |
375 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
376 | ARCH ?= $(SUBARCH) | |
377 | ||
378 | # Architecture as present in compile.h | |
379 | UTS_MACHINE := $(ARCH) | |
380 | SRCARCH := $(ARCH) | |
381 | ||
382 | # Additional ARCH settings for x86 | |
383 | ifeq ($(ARCH),i386) | |
384 | SRCARCH := x86 | |
385 | endif | |
386 | ifeq ($(ARCH),x86_64) | |
387 | SRCARCH := x86 | |
388 | endif | |
389 | ||
390 | # Additional ARCH settings for sparc | |
391 | ifeq ($(ARCH),sparc32) | |
392 | SRCARCH := sparc | |
393 | endif | |
394 | ifeq ($(ARCH),sparc64) | |
395 | SRCARCH := sparc | |
396 | endif | |
397 | ||
398 | # Additional ARCH settings for sh | |
399 | ifeq ($(ARCH),sh64) | |
400 | SRCARCH := sh | |
401 | endif | |
402 | ||
403 | KCONFIG_CONFIG ?= .config | |
404 | export KCONFIG_CONFIG | |
405 | ||
406 | # SHELL used by kbuild | |
407 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
408 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
409 | else echo sh; fi ; fi) | |
410 | ||
411 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) | |
412 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
413 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
414 | ||
415 | HOSTCC = gcc | |
416 | HOSTCXX = g++ | |
417 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ | |
418 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ | |
419 | $(HOSTCFLAGS) | |
420 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
421 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
422 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
423 | ||
424 | # Make variables (CC, etc...) | |
425 | AS = $(CROSS_COMPILE)as | |
426 | LD = $(CROSS_COMPILE)ld | |
427 | CC = $(CROSS_COMPILE)gcc | |
428 | CPP = $(CC) -E | |
429 | AR = $(CROSS_COMPILE)ar | |
430 | NM = $(CROSS_COMPILE)nm | |
431 | STRIP = $(CROSS_COMPILE)strip | |
432 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
433 | OBJDUMP = $(CROSS_COMPILE)objdump | |
434 | OBJSIZE = $(CROSS_COMPILE)size | |
435 | PAHOLE = pahole | |
436 | LEX = flex | |
437 | YACC = bison | |
438 | AWK = awk | |
439 | INSTALLKERNEL := installkernel | |
440 | DEPMOD = /sbin/depmod | |
441 | PERL = perl | |
442 | PYTHON = python | |
443 | PYTHON2 = python2 | |
444 | PYTHON3 = python3 | |
445 | CHECK = sparse | |
446 | ||
447 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
448 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) | |
449 | NOSTDINC_FLAGS := | |
450 | CFLAGS_MODULE = | |
451 | AFLAGS_MODULE = | |
452 | LDFLAGS_MODULE = | |
453 | CFLAGS_KERNEL = | |
454 | AFLAGS_KERNEL = | |
455 | LDFLAGS_vmlinux = | |
456 | ||
457 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
458 | USERINCLUDE := \ | |
459 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ | |
460 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
461 | -I$(srctree)/include/uapi \ | |
462 | -I$(objtree)/include/generated/uapi \ | |
463 | -include $(srctree)/include/linux/kconfig.h | |
464 | ||
465 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
466 | # Needed to be compatible with the O= option | |
467 | LINUXINCLUDE := \ | |
468 | -I$(srctree)/arch/$(SRCARCH)/include \ | |
469 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
470 | $(if $(building_out_of_srctree),-I$(srctree)/include) \ | |
471 | -I$(objtree)/include \ | |
472 | $(USERINCLUDE) | |
473 | ||
474 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE | |
475 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ | |
476 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ | |
477 | -Werror=implicit-function-declaration -Werror=implicit-int \ | |
478 | -Wno-format-security \ | |
479 | -std=gnu89 | |
480 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
481 | KBUILD_AFLAGS_KERNEL := | |
482 | KBUILD_CFLAGS_KERNEL := | |
483 | KBUILD_AFLAGS_MODULE := -DMODULE | |
484 | KBUILD_CFLAGS_MODULE := -DMODULE | |
485 | KBUILD_LDFLAGS_MODULE := | |
486 | export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds | |
487 | KBUILD_LDFLAGS := | |
488 | GCC_PLUGINS_CFLAGS := | |
489 | CLANG_FLAGS := | |
490 | ||
491 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC | |
492 | export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL | |
493 | export PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX | |
494 | export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE | |
495 | ||
496 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS | |
497 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | |
498 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
499 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
500 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
501 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL | |
502 | export KBUILD_ARFLAGS | |
503 | ||
504 | # Files to ignore in find ... statements | |
505 | ||
506 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ | |
507 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
508 | -prune -o | |
509 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ | |
510 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
511 | ||
512 | # =========================================================================== | |
513 | # Rules shared between *config targets and build targets | |
514 | ||
515 | # Basic helpers built in scripts/basic/ | |
516 | PHONY += scripts_basic | |
517 | scripts_basic: | |
518 | $(Q)$(MAKE) $(build)=scripts/basic | |
519 | $(Q)rm -f .tmp_quiet_recordmcount | |
520 | ||
521 | PHONY += outputmakefile | |
522 | # outputmakefile generates a Makefile in the output directory, if using a | |
523 | # separate output directory. This allows convenient use of make in the | |
524 | # output directory. | |
525 | # At the same time when output Makefile generated, generate .gitignore to | |
526 | # ignore whole output directory | |
527 | outputmakefile: | |
528 | ifdef building_out_of_srctree | |
529 | $(Q)ln -fsn $(srctree) source | |
530 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) | |
531 | $(Q)test -e .gitignore || \ | |
532 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
533 | endif | |
534 | ||
535 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) | |
536 | ifneq ($(CROSS_COMPILE),) | |
537 | CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) | |
538 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) | |
539 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) | |
540 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) | |
541 | endif | |
542 | ifneq ($(GCC_TOOLCHAIN),) | |
543 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) | |
544 | endif | |
545 | ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) | |
546 | CLANG_FLAGS += -no-integrated-as | |
547 | endif | |
548 | CLANG_FLAGS += -Werror=unknown-warning-option | |
549 | KBUILD_CFLAGS += $(CLANG_FLAGS) | |
550 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
551 | export CLANG_FLAGS | |
552 | endif | |
553 | ||
554 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. | |
555 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
556 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
557 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
558 | CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) | |
559 | ||
560 | ifdef config-build | |
561 | # =========================================================================== | |
562 | # *config targets only - make sure prerequisites are updated, and descend | |
563 | # in scripts/kconfig to make the *config target | |
564 | ||
565 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
566 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
567 | # used for 'make defconfig' | |
568 | include arch/$(SRCARCH)/Makefile | |
569 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT | |
570 | ||
571 | config: scripts_basic outputmakefile FORCE | |
572 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
573 | ||
574 | %config: scripts_basic outputmakefile FORCE | |
575 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
576 | ||
577 | else #!config-build | |
578 | # =========================================================================== | |
579 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
580 | # targets and others. In general all targets except *config targets. | |
581 | ||
582 | # If building an external module we do not care about the all: rule | |
583 | # but instead _all depend on modules | |
584 | PHONY += all | |
585 | ifeq ($(KBUILD_EXTMOD),) | |
586 | _all: all | |
587 | else | |
588 | _all: modules | |
589 | endif | |
590 | ||
591 | # Decide whether to build built-in, modular, or both. | |
592 | # Normally, just do built-in. | |
593 | ||
594 | KBUILD_MODULES := | |
595 | KBUILD_BUILTIN := 1 | |
596 | ||
597 | # If we have only "make modules", don't compile built-in objects. | |
598 | # When we're building modules with modversions, we need to consider | |
599 | # the built-in objects during the descend as well, in order to | |
600 | # make sure the checksums are up to date before we record them. | |
601 | ||
602 | ifeq ($(MAKECMDGOALS),modules) | |
603 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
604 | endif | |
605 | ||
606 | # If we have "make <whatever> modules", compile modules | |
607 | # in addition to whatever we do anyway. | |
608 | # Just "make" or "make all" shall build modules as well | |
609 | ||
610 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
611 | KBUILD_MODULES := 1 | |
612 | endif | |
613 | ||
614 | ifeq ($(MAKECMDGOALS),) | |
615 | KBUILD_MODULES := 1 | |
616 | endif | |
617 | ||
618 | export KBUILD_MODULES KBUILD_BUILTIN | |
619 | ||
620 | ifdef need-config | |
621 | include include/config/auto.conf | |
622 | endif | |
623 | ||
624 | ifeq ($(KBUILD_EXTMOD),) | |
625 | # Objects we will link into vmlinux / subdirs we need to visit | |
626 | init-y := init/ | |
627 | drivers-y := drivers/ sound/ | |
628 | drivers-$(CONFIG_SAMPLES) += samples/ | |
629 | drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/ | |
630 | net-y := net/ | |
631 | libs-y := lib/ | |
632 | core-y := usr/ | |
633 | virt-y := virt/ | |
634 | endif # KBUILD_EXTMOD | |
635 | ||
636 | # The all: target is the default when no target is given on the | |
637 | # command line. | |
638 | # This allow a user to issue only 'make' to build a kernel including modules | |
639 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
640 | all: vmlinux | |
641 | ||
642 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
643 | $(call cc-option,-fno-tree-loop-im) \ | |
644 | $(call cc-disable-warning,maybe-uninitialized,) | |
645 | export CFLAGS_GCOV | |
646 | ||
647 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. | |
648 | ifdef CONFIG_FUNCTION_TRACER | |
649 | CC_FLAGS_FTRACE := -pg | |
650 | endif | |
651 | ||
652 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register | |
653 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
654 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
655 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
656 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
657 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
658 | export RETPOLINE_CFLAGS | |
659 | export RETPOLINE_VDSO_CFLAGS | |
660 | ||
661 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default | |
662 | # values of the respective KBUILD_* variables | |
663 | ARCH_CPPFLAGS := | |
664 | ARCH_AFLAGS := | |
665 | ARCH_CFLAGS := | |
666 | include arch/$(SRCARCH)/Makefile | |
667 | ||
668 | ifdef need-config | |
669 | ifdef may-sync-config | |
670 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if | |
671 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
672 | # because some architectures define CROSS_COMPILE there. | |
673 | include include/config/auto.conf.cmd | |
674 | ||
675 | $(KCONFIG_CONFIG): | |
676 | @echo >&2 '***' | |
677 | @echo >&2 '*** Configuration file "$@" not found!' | |
678 | @echo >&2 '***' | |
679 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
680 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
681 | @echo >&2 '***' | |
682 | @/bin/false | |
683 | ||
684 | # The actual configuration files used during the build are stored in | |
685 | # include/generated/ and include/config/. Update them if .config is newer than | |
686 | # include/config/auto.conf (which mirrors .config). | |
687 | # | |
688 | # This exploits the 'multi-target pattern rule' trick. | |
689 | # The syncconfig should be executed only once to make all the targets. | |
690 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) | |
691 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
692 | else # !may-sync-config | |
693 | # External modules and some install targets need include/generated/autoconf.h | |
694 | # and include/config/auto.conf but do not care if they are up-to-date. | |
695 | # Use auto.conf to trigger the test | |
696 | PHONY += include/config/auto.conf | |
697 | ||
698 | include/config/auto.conf: | |
699 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ | |
700 | echo >&2; \ | |
701 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
702 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
703 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
704 | echo >&2 ; \ | |
705 | /bin/false) | |
706 | ||
707 | endif # may-sync-config | |
708 | endif # need-config | |
709 | ||
710 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) | |
711 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) | |
712 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) | |
713 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
714 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
715 | ||
716 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
717 | KBUILD_CFLAGS += -Os | |
718 | else | |
719 | KBUILD_CFLAGS += -O2 | |
720 | endif | |
721 | ||
722 | ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED | |
723 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
724 | endif | |
725 | ||
726 | # Tell gcc to never replace conditional load with a non-conditional one | |
727 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
728 | ||
729 | include scripts/Makefile.kcov | |
730 | include scripts/Makefile.gcc-plugins | |
731 | ||
732 | ifdef CONFIG_READABLE_ASM | |
733 | # Disable optimizations that make assembler listings hard to read. | |
734 | # reorder blocks reorders the control in the function | |
735 | # ipa clone creates specialized cloned functions | |
736 | # partial inlining inlines only parts of functions | |
737 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
738 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
739 | $(call cc-option,-fno-partial-inlining) | |
740 | endif | |
741 | ||
742 | ifneq ($(CONFIG_FRAME_WARN),0) | |
743 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) | |
744 | endif | |
745 | ||
746 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector | |
747 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector | |
748 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
749 | ||
750 | KBUILD_CFLAGS += $(stackp-flags-y) | |
751 | ||
752 | ifdef CONFIG_CC_IS_CLANG | |
753 | KBUILD_CPPFLAGS += -Qunused-arguments | |
754 | KBUILD_CFLAGS += -Wno-format-invalid-specifier | |
755 | KBUILD_CFLAGS += -Wno-gnu | |
756 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
757 | KBUILD_CFLAGS += -Wno-tautological-compare | |
758 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
759 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
760 | # See modpost pattern 2 | |
761 | KBUILD_CFLAGS += -mno-global-merge | |
762 | else | |
763 | ||
764 | # These warnings generated too much noise in a regular build. | |
765 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
766 | KBUILD_CFLAGS += -Wno-unused-but-set-variable | |
767 | endif | |
768 | ||
769 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) | |
770 | ifdef CONFIG_FRAME_POINTER | |
771 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
772 | else | |
773 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
774 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
775 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
776 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
777 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
778 | ifndef CONFIG_FUNCTION_TRACER | |
779 | KBUILD_CFLAGS += -fomit-frame-pointer | |
780 | endif | |
781 | endif | |
782 | ||
783 | # Initialize all stack variables with a pattern, if desired. | |
784 | ifdef CONFIG_INIT_STACK_ALL | |
785 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
786 | endif | |
787 | ||
788 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) | |
789 | ||
790 | ifdef CONFIG_DEBUG_INFO | |
791 | ifdef CONFIG_DEBUG_INFO_SPLIT | |
792 | DEBUG_CFLAGS += -gsplit-dwarf | |
793 | else | |
794 | DEBUG_CFLAGS += -g | |
795 | endif | |
796 | KBUILD_AFLAGS += -Wa,-gdwarf-2 | |
797 | endif | |
798 | ifdef CONFIG_DEBUG_INFO_DWARF4 | |
799 | DEBUG_CFLAGS += -gdwarf-4 | |
800 | endif | |
801 | ||
802 | ifdef CONFIG_DEBUG_INFO_REDUCED | |
803 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ | |
804 | $(call cc-option,-fno-var-tracking) | |
805 | endif | |
806 | ||
807 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) | |
808 | export DEBUG_CFLAGS | |
809 | ||
810 | ifdef CONFIG_FUNCTION_TRACER | |
811 | ifdef CONFIG_FTRACE_MCOUNT_RECORD | |
812 | # gcc 5 supports generating the mcount tables directly | |
813 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
814 | CC_FLAGS_FTRACE += -mrecord-mcount | |
815 | export CC_USING_RECORD_MCOUNT := 1 | |
816 | endif | |
817 | ifdef CONFIG_HAVE_NOP_MCOUNT | |
818 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
819 | CC_FLAGS_FTRACE += -mnop-mcount | |
820 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
821 | endif | |
822 | endif | |
823 | endif | |
824 | ifdef CONFIG_HAVE_FENTRY | |
825 | ifeq ($(call cc-option-yn, -mfentry),y) | |
826 | CC_FLAGS_FTRACE += -mfentry | |
827 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
828 | endif | |
829 | endif | |
830 | export CC_FLAGS_FTRACE | |
831 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
832 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
833 | ifdef CONFIG_DYNAMIC_FTRACE | |
834 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
835 | BUILD_C_RECORDMCOUNT := y | |
836 | export BUILD_C_RECORDMCOUNT | |
837 | endif | |
838 | endif | |
839 | endif | |
840 | ||
841 | # We trigger additional mismatches with less inlining | |
842 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
843 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
844 | endif | |
845 | ||
846 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
847 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections | |
848 | LDFLAGS_vmlinux += --gc-sections | |
849 | endif | |
850 | ||
851 | ifdef CONFIG_LIVEPATCH | |
852 | KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) | |
853 | endif | |
854 | ||
855 | # arch Makefile may override CC so keep this after arch Makefile is included | |
856 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | |
857 | ||
858 | # warn about C99 declaration after statement | |
859 | KBUILD_CFLAGS += -Wdeclaration-after-statement | |
860 | ||
861 | # Warn about unmarked fall-throughs in switch statement. | |
862 | KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) | |
863 | ||
864 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel | |
865 | KBUILD_CFLAGS += -Wvla | |
866 | ||
867 | # disable pointer signed / unsigned warnings in gcc 4.0 | |
868 | KBUILD_CFLAGS += -Wno-pointer-sign | |
869 | ||
870 | # disable stringop warnings in gcc 8+ | |
871 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
872 | ||
873 | # disable invalid "can't wrap" optimizations for signed / pointers | |
874 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) | |
875 | ||
876 | # clang sets -fmerge-all-constants by default as optimization, but this | |
877 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
878 | # need to disable it here generally. | |
879 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
880 | ||
881 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
882 | # to have actual conforming behavior enabled. | |
883 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
884 | ||
885 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) | |
886 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
887 | ||
888 | # conserve stack if available | |
889 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
890 | ||
891 | # Prohibit date/time macros, which would make the build non-deterministic | |
892 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
893 | ||
894 | # enforce correct pointer usage | |
895 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
896 | ||
897 | # Require designated initializers for all marked structures | |
898 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
899 | ||
900 | # change __FILE__ to the relative path from the srctree | |
901 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
902 | ||
903 | # ensure -fcf-protection is disabled when using retpoline as it is | |
904 | # incompatible with -mindirect-branch=thunk-extern | |
905 | ifdef CONFIG_RETPOLINE | |
906 | KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) | |
907 | endif | |
908 | ||
909 | # use the deterministic mode of AR if available | |
910 | KBUILD_ARFLAGS := $(call ar-option,D) | |
911 | ||
912 | include scripts/Makefile.kasan | |
913 | include scripts/Makefile.extrawarn | |
914 | include scripts/Makefile.ubsan | |
915 | ||
916 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the | |
917 | # last assignments | |
918 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
919 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
920 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
921 | ||
922 | KBUILD_LDFLAGS_MODULE += --build-id | |
923 | LDFLAGS_vmlinux += --build-id | |
924 | ||
925 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
926 | LDFLAGS_vmlinux += $(call ld-option, -X,) | |
927 | endif | |
928 | ||
929 | # insure the checker run with the right endianness | |
930 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
931 | ||
932 | # the checker needs the correct machine size | |
933 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
934 | ||
935 | # Default kernel image to build when no specific target is given. | |
936 | # KBUILD_IMAGE may be overruled on the command line or | |
937 | # set in the environment | |
938 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
939 | # this default value | |
940 | export KBUILD_IMAGE ?= vmlinux | |
941 | ||
942 | # | |
943 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
944 | # images. Default is /boot, but you can set it to other values | |
945 | export INSTALL_PATH ?= /boot | |
946 | ||
947 | # | |
948 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
949 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
950 | # an argument if needed. Otherwise it defaults to the kernel install path | |
951 | # | |
952 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
953 | ||
954 | # | |
955 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
956 | # relocations required by build roots. This is not defined in the | |
957 | # makefile but the argument can be passed to make if needed. | |
958 | # | |
959 | ||
960 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
961 | export MODLIB | |
962 | ||
963 | # | |
964 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
965 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
966 | # the default option --strip-debug will be used. Otherwise, | |
967 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
968 | ||
969 | ifdef INSTALL_MOD_STRIP | |
970 | ifeq ($(INSTALL_MOD_STRIP),1) | |
971 | mod_strip_cmd = $(STRIP) --strip-debug | |
972 | else | |
973 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
974 | endif # INSTALL_MOD_STRIP=1 | |
975 | else | |
976 | mod_strip_cmd = true | |
977 | endif # INSTALL_MOD_STRIP | |
978 | export mod_strip_cmd | |
979 | ||
980 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed | |
981 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
982 | # or CONFIG_MODULE_COMPRESS_XZ. | |
983 | ||
984 | mod_compress_cmd = true | |
985 | ifdef CONFIG_MODULE_COMPRESS | |
986 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
987 | mod_compress_cmd = gzip -n -f | |
988 | endif # CONFIG_MODULE_COMPRESS_GZIP | |
989 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
990 | mod_compress_cmd = xz -f | |
991 | endif # CONFIG_MODULE_COMPRESS_XZ | |
992 | endif # CONFIG_MODULE_COMPRESS | |
993 | export mod_compress_cmd | |
994 | ||
995 | ifdef CONFIG_MODULE_SIG_ALL | |
996 | $(eval $(call config_filename,MODULE_SIG_KEY)) | |
997 | ||
998 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
999 | else | |
1000 | mod_sign_cmd = true | |
1001 | endif | |
1002 | export mod_sign_cmd | |
1003 | ||
1004 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) | |
1005 | ||
1006 | ifdef CONFIG_STACK_VALIDATION | |
1007 | has_libelf := $(call try-run,\ | |
1008 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) | |
1009 | ifeq ($(has_libelf),1) | |
1010 | objtool_target := tools/objtool FORCE | |
1011 | else | |
1012 | SKIP_STACK_VALIDATION := 1 | |
1013 | export SKIP_STACK_VALIDATION | |
1014 | endif | |
1015 | endif | |
1016 | ||
1017 | PHONY += prepare0 | |
1018 | ||
1019 | export MODORDER := $(extmod-prefix)modules.order | |
1020 | ||
1021 | ifeq ($(KBUILD_EXTMOD),) | |
1022 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ | |
1023 | ||
1024 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
1025 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
1026 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) | |
1027 | ||
1028 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ | |
1029 | $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ | |
1030 | $(drivers-) $(net-) $(libs-) $(virt-)))) | |
1031 | ||
1032 | build-dirs := $(vmlinux-dirs) | |
1033 | clean-dirs := $(vmlinux-alldirs) | |
1034 | ||
1035 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) | |
1036 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
1037 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
1038 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1039 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
1040 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) | |
1041 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1042 | ||
1043 | # Externally visible symbols (used by link-vmlinux.sh) | |
1044 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ | |
1045 | $(drivers-y) $(net-y) $(virt-y) | |
1046 | export KBUILD_VMLINUX_LIBS := $(libs-y1) | |
1047 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
1048 | export LDFLAGS_vmlinux | |
1049 | # used by scripts/package/Makefile | |
1050 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) | |
1051 | ||
1052 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) | |
1053 | ||
1054 | # Recurse until adjust_autoksyms.sh is satisfied | |
1055 | PHONY += autoksyms_recursive | |
1056 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1057 | autoksyms_recursive: descend modules.order | |
1058 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ | |
1059 | "$(MAKE) -f $(srctree)/Makefile vmlinux" | |
1060 | endif | |
1061 | ||
1062 | # For the kernel to actually contain only the needed exported symbols, | |
1063 | # we have to build modules as well to determine what those symbols are. | |
1064 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1065 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1066 | KBUILD_MODULES := 1 | |
1067 | endif | |
1068 | ||
1069 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) | |
1070 | ||
1071 | $(autoksyms_h): | |
1072 | $(Q)mkdir -p $(dir $@) | |
1073 | $(Q)touch $@ | |
1074 | ||
1075 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) | |
1076 | ||
1077 | # Final link of vmlinux with optional arch pass after final link | |
1078 | cmd_link-vmlinux = \ | |
1079 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ | |
1080 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) | |
1081 | ||
1082 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE | |
1083 | +$(call if_changed,link-vmlinux) | |
1084 | ||
1085 | targets := vmlinux | |
1086 | ||
1087 | # The actual objects are generated when descending, | |
1088 | # make sure no implicit rule kicks in | |
1089 | $(sort $(vmlinux-deps)): descend ; | |
1090 | ||
1091 | filechk_kernel.release = \ | |
1092 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1093 | ||
1094 | # Store (new) KERNELRELEASE string in include/config/kernel.release | |
1095 | include/config/kernel.release: FORCE | |
1096 | $(call filechk,kernel.release) | |
1097 | ||
1098 | # Additional helpers built in scripts/ | |
1099 | # Carefully list dependencies so we do not try to build scripts twice | |
1100 | # in parallel | |
1101 | PHONY += scripts | |
1102 | scripts: scripts_basic scripts_dtc | |
1103 | $(Q)$(MAKE) $(build)=$(@) | |
1104 | ||
1105 | # Things we need to do before we recursively start building the kernel | |
1106 | # or the modules are listed in "prepare". | |
1107 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1108 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1109 | # version.h and scripts_basic is processed / created. | |
1110 | ||
1111 | PHONY += prepare archprepare prepare3 | |
1112 | ||
1113 | # prepare3 is used to check if we are building in a separate output directory, | |
1114 | # and if so do: | |
1115 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
1116 | prepare3: include/config/kernel.release | |
1117 | ifdef building_out_of_srctree | |
1118 | $(Q)if [ -f $(srctree)/.config -o \ | |
1119 | -d $(srctree)/include/config -o \ | |
1120 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
1121 | echo >&2 "***"; \ | |
1122 | echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \ | |
1123 | echo >&2 "*** in $(abs_srctree)";\ | |
1124 | echo >&2 "***"; \ | |
1125 | /bin/false; \ | |
1126 | fi; | |
1127 | endif | |
1128 | ||
1129 | archprepare: archheaders archscripts scripts prepare3 outputmakefile \ | |
1130 | asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h | |
1131 | ||
1132 | prepare0: archprepare | |
1133 | $(Q)$(MAKE) $(build)=scripts/mod | |
1134 | $(Q)$(MAKE) $(build)=. | |
1135 | ||
1136 | # All the preparing.. | |
1137 | prepare: prepare0 prepare-objtool | |
1138 | ||
1139 | # Support for using generic headers in asm-generic | |
1140 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj | |
1141 | ||
1142 | PHONY += asm-generic uapi-asm-generic | |
1143 | asm-generic: uapi-asm-generic | |
1144 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ | |
1145 | generic=include/asm-generic | |
1146 | uapi-asm-generic: | |
1147 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ | |
1148 | generic=include/uapi/asm-generic | |
1149 | ||
1150 | PHONY += prepare-objtool | |
1151 | prepare-objtool: $(objtool_target) | |
1152 | ifeq ($(SKIP_STACK_VALIDATION),1) | |
1153 | ifdef CONFIG_UNWINDER_ORC | |
1154 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1155 | @false | |
1156 | else | |
1157 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1158 | endif | |
1159 | endif | |
1160 | ||
1161 | # Generate some files | |
1162 | # --------------------------------------------------------------------------- | |
1163 | ||
1164 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1165 | # needs to be updated, so this check is forced on all builds | |
1166 | ||
1167 | uts_len := 64 | |
1168 | define filechk_utsrelease.h | |
1169 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1170 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1171 | exit 1; \ | |
1172 | fi; \ | |
1173 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" | |
1174 | endef | |
1175 | ||
1176 | define filechk_version.h | |
1177 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1178 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
1179 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' | |
1180 | endef | |
1181 | ||
1182 | $(version_h): FORCE | |
1183 | $(call filechk,version.h) | |
1184 | $(Q)rm -f $(old_version_h) | |
1185 | ||
1186 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1187 | $(call filechk,utsrelease.h) | |
1188 | ||
1189 | PHONY += headerdep | |
1190 | headerdep: | |
1191 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
1192 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
1193 | ||
1194 | # --------------------------------------------------------------------------- | |
1195 | # Kernel headers | |
1196 | ||
1197 | #Default location for installed headers | |
1198 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1199 | ||
1200 | quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include | |
1201 | cmd_headers_install = \ | |
1202 | mkdir -p $(INSTALL_HDR_PATH); \ | |
1203 | rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ | |
1204 | usr/include $(INSTALL_HDR_PATH) | |
1205 | ||
1206 | PHONY += headers_install | |
1207 | headers_install: headers | |
1208 | $(call cmd,headers_install) | |
1209 | ||
1210 | PHONY += archheaders archscripts | |
1211 | ||
1212 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj | |
1213 | ||
1214 | PHONY += headers | |
1215 | headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts | |
1216 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ | |
1217 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
1218 | $(Q)$(MAKE) $(hdr-inst)=include/uapi | |
1219 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi | |
1220 | ||
1221 | PHONY += headers_check | |
1222 | headers_check: headers | |
1223 | $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 | |
1224 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1 | |
1225 | ||
1226 | ifdef CONFIG_HEADERS_INSTALL | |
1227 | prepare: headers | |
1228 | endif | |
1229 | ||
1230 | ifdef CONFIG_HEADERS_CHECK | |
1231 | all: headers_check | |
1232 | endif | |
1233 | ||
1234 | PHONY += scripts_unifdef | |
1235 | scripts_unifdef: scripts_basic | |
1236 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef | |
1237 | ||
1238 | # --------------------------------------------------------------------------- | |
1239 | # Kernel selftest | |
1240 | ||
1241 | PHONY += kselftest | |
1242 | kselftest: | |
1243 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests | |
1244 | ||
1245 | PHONY += kselftest-clean | |
1246 | kselftest-clean: | |
1247 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean | |
1248 | ||
1249 | PHONY += kselftest-merge | |
1250 | kselftest-merge: | |
1251 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1252 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ | |
1253 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
1254 | $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1255 | ||
1256 | # --------------------------------------------------------------------------- | |
1257 | # Devicetree files | |
1258 | ||
1259 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1260 | dtstree := arch/$(SRCARCH)/boot/dts | |
1261 | endif | |
1262 | ||
1263 | ifneq ($(dtstree),) | |
1264 | ||
1265 | %.dtb: prepare3 scripts_dtc | |
1266 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1267 | ||
1268 | PHONY += dtbs dtbs_install dt_binding_check | |
1269 | dtbs dtbs_check: prepare3 scripts_dtc | |
1270 | $(Q)$(MAKE) $(build)=$(dtstree) | |
1271 | ||
1272 | dtbs_check: export CHECK_DTBS=1 | |
1273 | dtbs_check: dt_binding_check | |
1274 | ||
1275 | dtbs_install: | |
1276 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1277 | ||
1278 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1279 | all: dtbs | |
1280 | endif | |
1281 | ||
1282 | endif | |
1283 | ||
1284 | PHONY += scripts_dtc | |
1285 | scripts_dtc: scripts_basic | |
1286 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1287 | ||
1288 | dt_binding_check: scripts_dtc | |
1289 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1290 | ||
1291 | # --------------------------------------------------------------------------- | |
1292 | # Modules | |
1293 | ||
1294 | ifdef CONFIG_MODULES | |
1295 | ||
1296 | # By default, build modules as well | |
1297 | ||
1298 | all: modules | |
1299 | ||
1300 | # Build modules | |
1301 | # | |
1302 | # A module can be listed more than once in obj-m resulting in | |
1303 | # duplicate lines in modules.order files. Those are removed | |
1304 | # using awk while concatenating to the final file. | |
1305 | ||
1306 | PHONY += modules | |
1307 | modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin | |
1308 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1309 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh | |
1310 | ||
1311 | modules.order: descend | |
1312 | $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ | |
1313 | ||
1314 | modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs)) | |
1315 | ||
1316 | modules.builtin: $(modbuiltin-dirs) | |
1317 | $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ | |
1318 | ||
1319 | PHONY += $(modbuiltin-dirs) | |
1320 | # tristate.conf is not included from this Makefile. Add it as a prerequisite | |
1321 | # here to make it self-healing in case somebody accidentally removes it. | |
1322 | $(modbuiltin-dirs): include/config/tristate.conf | |
1323 | $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) | |
1324 | ||
1325 | # Target to prepare building external modules | |
1326 | PHONY += modules_prepare | |
1327 | modules_prepare: prepare | |
1328 | ||
1329 | # Target to install modules | |
1330 | PHONY += modules_install | |
1331 | modules_install: _modinst_ _modinst_post | |
1332 | ||
1333 | PHONY += _modinst_ | |
1334 | _modinst_: | |
1335 | @rm -rf $(MODLIB)/kernel | |
1336 | @rm -f $(MODLIB)/source | |
1337 | @mkdir -p $(MODLIB)/kernel | |
1338 | @ln -s $(abspath $(srctree)) $(MODLIB)/source | |
1339 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1340 | rm -f $(MODLIB)/build ; \ | |
1341 | ln -s $(CURDIR) $(MODLIB)/build ; \ | |
1342 | fi | |
1343 | @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order | |
1344 | @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin | |
1345 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ | |
1346 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1347 | ||
1348 | # This depmod is only for convenience to give the initial | |
1349 | # boot a modules.dep even before / is mounted read-write. However the | |
1350 | # boot script depmod is the master version. | |
1351 | PHONY += _modinst_post | |
1352 | _modinst_post: _modinst_ | |
1353 | $(call cmd,depmod) | |
1354 | ||
1355 | ifeq ($(CONFIG_MODULE_SIG), y) | |
1356 | PHONY += modules_sign | |
1357 | modules_sign: | |
1358 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1359 | endif | |
1360 | ||
1361 | else # CONFIG_MODULES | |
1362 | ||
1363 | # Modules not configured | |
1364 | # --------------------------------------------------------------------------- | |
1365 | ||
1366 | PHONY += modules modules_install | |
1367 | modules modules_install: | |
1368 | @echo >&2 | |
1369 | @echo >&2 "The present kernel configuration has modules disabled." | |
1370 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1371 | @echo >&2 "Then build a kernel with module support enabled." | |
1372 | @echo >&2 | |
1373 | @exit 1 | |
1374 | ||
1375 | endif # CONFIG_MODULES | |
1376 | ||
1377 | ### | |
1378 | # Cleaning is done on three levels. | |
1379 | # make clean Delete most generated files | |
1380 | # Leave enough to build external modules | |
1381 | # make mrproper Delete the current configuration, and all generated files | |
1382 | # make distclean Remove editor backup files, patch leftover files and the like | |
1383 | ||
1384 | # Directories & files removed with 'make clean' | |
1385 | CLEAN_DIRS += include/ksym | |
1386 | CLEAN_FILES += modules.builtin.modinfo | |
1387 | ||
1388 | # Directories & files removed with 'make mrproper' | |
1389 | MRPROPER_DIRS += include/config include/generated \ | |
1390 | arch/$(SRCARCH)/include/generated .tmp_objdiff \ | |
1391 | debian/ snap/ tar-install/ | |
1392 | MRPROPER_FILES += .config .config.old .version \ | |
1393 | Module.symvers \ | |
1394 | signing_key.pem signing_key.priv signing_key.x509 \ | |
1395 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
1396 | signing_key.x509.signer vmlinux-gdb.py \ | |
1397 | *.spec | |
1398 | ||
1399 | # Directories & files removed with 'make distclean' | |
1400 | DISTCLEAN_DIRS += | |
1401 | DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS | |
1402 | ||
1403 | # clean - Delete most, but leave enough to build external modules | |
1404 | # | |
1405 | clean: rm-dirs := $(CLEAN_DIRS) | |
1406 | clean: rm-files := $(CLEAN_FILES) | |
1407 | ||
1408 | PHONY += archclean vmlinuxclean | |
1409 | ||
1410 | vmlinuxclean: | |
1411 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1412 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) | |
1413 | ||
1414 | clean: archclean vmlinuxclean | |
1415 | ||
1416 | # mrproper - Delete all generated files, including .config | |
1417 | # | |
1418 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1419 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1420 | mrproper-dirs := $(addprefix _mrproper_,scripts) | |
1421 | ||
1422 | PHONY += $(mrproper-dirs) mrproper | |
1423 | $(mrproper-dirs): | |
1424 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1425 | ||
1426 | mrproper: clean $(mrproper-dirs) | |
1427 | $(call cmd,rmdirs) | |
1428 | $(call cmd,rmfiles) | |
1429 | ||
1430 | # distclean | |
1431 | # | |
1432 | distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) | |
1433 | distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) | |
1434 | ||
1435 | PHONY += distclean | |
1436 | ||
1437 | distclean: mrproper | |
1438 | $(call cmd,rmdirs) | |
1439 | $(call cmd,rmfiles) | |
1440 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
1441 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1442 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ | |
1443 | -o -name 'core' \) \ | |
1444 | -type f -print | xargs rm -f | |
1445 | ||
1446 | ||
1447 | # Packaging of the kernel to various formats | |
1448 | # --------------------------------------------------------------------------- | |
1449 | ||
1450 | %src-pkg: FORCE | |
1451 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1452 | %pkg: include/config/kernel.release FORCE | |
1453 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ | |
1454 | ||
1455 | # Brief documentation of the typical targets used | |
1456 | # --------------------------------------------------------------------------- | |
1457 | ||
1458 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1459 | boards := $(sort $(notdir $(boards))) | |
1460 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1461 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1462 | ||
1463 | PHONY += help | |
1464 | help: | |
1465 | @echo 'Cleaning targets:' | |
1466 | @echo ' clean - Remove most generated files but keep the config and' | |
1467 | @echo ' enough build support to build external modules' | |
1468 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1469 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1470 | @echo '' | |
1471 | @echo 'Configuration targets:' | |
1472 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1473 | @echo '' | |
1474 | @echo 'Other generic targets:' | |
1475 | @echo ' all - Build all targets marked with [*]' | |
1476 | @echo '* vmlinux - Build the bare kernel' | |
1477 | @echo '* modules - Build all modules' | |
1478 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1479 | @echo ' dir/ - Build all files in dir and below' | |
1480 | @echo ' dir/file.[ois] - Build specified target only' | |
1481 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1482 | @echo ' (requires compiler support for LLVM assembly generation)' | |
1483 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1484 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1485 | @echo ' dir/file.ko - Build module including final link' | |
1486 | @echo ' modules_prepare - Set up for building external modules' | |
1487 | @echo ' tags/TAGS - Generate tags file for editors' | |
1488 | @echo ' cscope - Generate cscope index' | |
1489 | @echo ' gtags - Generate GNU GLOBAL index' | |
1490 | @echo ' kernelrelease - Output the release version string (use with make -s)' | |
1491 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1492 | @echo ' image_name - Output the image name (use with make -s)' | |
1493 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1494 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1495 | echo '' | |
1496 | @echo 'Static analysers:' | |
1497 | @echo ' checkstack - Generate a list of stack hogs' | |
1498 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1499 | @echo ' versioncheck - Sanity check on version.h usage' | |
1500 | @echo ' includecheck - Check for duplicate included header files' | |
1501 | @echo ' export_report - List the usages of all exported symbols' | |
1502 | @echo ' headers_check - Sanity check on exported headers' | |
1503 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1504 | @echo ' coccicheck - Check with Coccinelle' | |
1505 | @echo '' | |
1506 | @echo 'Kernel selftest:' | |
1507 | @echo ' kselftest - Build and run kernel selftest (run as root)' | |
1508 | @echo ' Build, install, and boot kernel before' | |
1509 | @echo ' running kselftest on it' | |
1510 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1511 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' | |
1512 | @echo ' .config.' | |
1513 | @echo '' | |
1514 | @$(if $(dtstree), \ | |
1515 | echo 'Devicetree:'; \ | |
1516 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1517 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1518 | echo '') | |
1519 | ||
1520 | @echo 'Userspace tools targets:' | |
1521 | @echo ' use "make tools/help"' | |
1522 | @echo ' or "cd tools; make help"' | |
1523 | @echo '' | |
1524 | @echo 'Kernel packaging:' | |
1525 | @$(MAKE) -f $(srctree)/scripts/Makefile.package help | |
1526 | @echo '' | |
1527 | @echo 'Documentation targets:' | |
1528 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp | |
1529 | @echo '' | |
1530 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1531 | @$(if $(archhelp),$(archhelp),\ | |
1532 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1533 | @echo '' | |
1534 | @$(if $(boards), \ | |
1535 | $(foreach b, $(boards), \ | |
1536 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1537 | echo '') | |
1538 | @$(if $(board-dirs), \ | |
1539 | $(foreach b, $(board-dirs), \ | |
1540 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1541 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1542 | echo '') | |
1543 | ||
1544 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1545 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' | |
1546 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1547 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' | |
1548 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1549 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1550 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' | |
1551 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1552 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1553 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1554 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1555 | @echo '' | |
1556 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1557 | @echo 'For further info see the ./README file' | |
1558 | ||
1559 | ||
1560 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1561 | ||
1562 | help-boards: $(help-board-dirs) | |
1563 | ||
1564 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) | |
1565 | ||
1566 | $(help-board-dirs): help-%: | |
1567 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1568 | @$(if $(boards-per-dir), \ | |
1569 | $(foreach b, $(boards-per-dir), \ | |
1570 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1571 | echo '') | |
1572 | ||
1573 | ||
1574 | # Documentation targets | |
1575 | # --------------------------------------------------------------------------- | |
1576 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ | |
1577 | linkcheckdocs dochelp refcheckdocs | |
1578 | PHONY += $(DOC_TARGETS) | |
1579 | $(DOC_TARGETS): | |
1580 | $(Q)$(MAKE) $(build)=Documentation $@ | |
1581 | ||
1582 | # Misc | |
1583 | # --------------------------------------------------------------------------- | |
1584 | ||
1585 | PHONY += scripts_gdb | |
1586 | scripts_gdb: prepare0 | |
1587 | $(Q)$(MAKE) $(build)=scripts/gdb | |
1588 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1589 | ||
1590 | ifdef CONFIG_GDB_SCRIPTS | |
1591 | all: scripts_gdb | |
1592 | endif | |
1593 | ||
1594 | else # KBUILD_EXTMOD | |
1595 | ||
1596 | ### | |
1597 | # External module support. | |
1598 | # When building external modules the kernel used as basis is considered | |
1599 | # read-only, and no consistency checks are made and the make | |
1600 | # system is not used on the basis kernel. If updates are required | |
1601 | # in the basis kernel ordinary make commands (without M=...) must | |
1602 | # be used. | |
1603 | # | |
1604 | # The following are the only valid targets when building external | |
1605 | # modules. | |
1606 | # make M=dir clean Delete all automatically generated files | |
1607 | # make M=dir modules Make all modules in specified dir | |
1608 | # make M=dir Same as 'make M=dir modules' | |
1609 | # make M=dir modules_install | |
1610 | # Install the modules built in the module directory | |
1611 | # Assumes install directory is already created | |
1612 | ||
1613 | # We are always building modules | |
1614 | KBUILD_MODULES := 1 | |
1615 | ||
1616 | PHONY += $(objtree)/Module.symvers | |
1617 | $(objtree)/Module.symvers: | |
1618 | @test -e $(objtree)/Module.symvers || ( \ | |
1619 | echo; \ | |
1620 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1621 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1622 | echo ) | |
1623 | ||
1624 | build-dirs := $(KBUILD_EXTMOD) | |
1625 | PHONY += modules | |
1626 | modules: descend $(objtree)/Module.symvers | |
1627 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1628 | ||
1629 | PHONY += modules_install | |
1630 | modules_install: _emodinst_ _emodinst_post | |
1631 | ||
1632 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | |
1633 | PHONY += _emodinst_ | |
1634 | _emodinst_: | |
1635 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | |
1636 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1637 | ||
1638 | PHONY += _emodinst_post | |
1639 | _emodinst_post: _emodinst_ | |
1640 | $(call cmd,depmod) | |
1641 | ||
1642 | clean-dirs := $(KBUILD_EXTMOD) | |
1643 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers | |
1644 | ||
1645 | PHONY += / | |
1646 | /: | |
1647 | @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' | |
1648 | ||
1649 | PHONY += help | |
1650 | help: | |
1651 | @echo ' Building external modules.' | |
1652 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1653 | @echo '' | |
1654 | @echo ' modules - default target, build the module(s)' | |
1655 | @echo ' modules_install - install the module' | |
1656 | @echo ' clean - remove generated files in module directory only' | |
1657 | @echo '' | |
1658 | ||
1659 | PHONY += prepare | |
1660 | endif # KBUILD_EXTMOD | |
1661 | ||
1662 | # Handle descending into subdirectories listed in $(build-dirs) | |
1663 | # Preset locale variables to speed up the build process. Limit locale | |
1664 | # tweaks to this spot to avoid wrong language settings when running | |
1665 | # make menuconfig etc. | |
1666 | # Error messages still appears in the original language | |
1667 | PHONY += descend $(build-dirs) | |
1668 | descend: $(build-dirs) | |
1669 | $(build-dirs): prepare | |
1670 | $(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1 | |
1671 | ||
1672 | clean-dirs := $(addprefix _clean_, $(clean-dirs)) | |
1673 | PHONY += $(clean-dirs) clean | |
1674 | $(clean-dirs): | |
1675 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1676 | ||
1677 | clean: $(clean-dirs) | |
1678 | $(call cmd,rmdirs) | |
1679 | $(call cmd,rmfiles) | |
1680 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1681 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1682 | -o -name '*.ko.*' \ | |
1683 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
1684 | -o -name '*.dwo' -o -name '*.lst' \ | |
1685 | -o -name '*.su' -o -name '*.mod' \ | |
1686 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1687 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ | |
1688 | -o -name '*.asn1.[ch]' \ | |
1689 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1690 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
1691 | -o -name '*.c.[012]*.*' \ | |
1692 | -o -name '*.ll' \ | |
1693 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1694 | ||
1695 | # Generate tags for editors | |
1696 | # --------------------------------------------------------------------------- | |
1697 | quiet_cmd_tags = GEN $@ | |
1698 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1699 | ||
1700 | tags TAGS cscope gtags: FORCE | |
1701 | $(call cmd,tags) | |
1702 | ||
1703 | # Scripts to check various things for consistency | |
1704 | # --------------------------------------------------------------------------- | |
1705 | ||
1706 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report | |
1707 | ||
1708 | includecheck: | |
1709 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1710 | -name '*.[hcS]' -type f -print | sort \ | |
1711 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1712 | ||
1713 | versioncheck: | |
1714 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1715 | -name '*.[hcS]' -type f -print | sort \ | |
1716 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
1717 | ||
1718 | coccicheck: | |
1719 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1720 | ||
1721 | namespacecheck: | |
1722 | $(PERL) $(srctree)/scripts/namespace.pl | |
1723 | ||
1724 | export_report: | |
1725 | $(PERL) $(srctree)/scripts/export_report.pl | |
1726 | ||
1727 | PHONY += checkstack kernelrelease kernelversion image_name | |
1728 | ||
1729 | # UML needs a little special treatment here. It wants to use the host | |
1730 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1731 | # else wants $(ARCH), including people doing cross-builds, which means | |
1732 | # that $(SUBARCH) doesn't work here. | |
1733 | ifeq ($(ARCH), um) | |
1734 | CHECKSTACK_ARCH := $(SUBARCH) | |
1735 | else | |
1736 | CHECKSTACK_ARCH := $(ARCH) | |
1737 | endif | |
1738 | checkstack: | |
1739 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1740 | $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
1741 | ||
1742 | kernelrelease: | |
1743 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1744 | ||
1745 | kernelversion: | |
1746 | @echo $(KERNELVERSION) | |
1747 | ||
1748 | image_name: | |
1749 | @echo $(KBUILD_IMAGE) | |
1750 | ||
1751 | # Clear a bunch of variables before executing the submake | |
1752 | ||
1753 | ifeq ($(quiet),silent_) | |
1754 | tools_silent=s | |
1755 | endif | |
1756 | ||
1757 | tools/: FORCE | |
1758 | $(Q)mkdir -p $(objtree)/tools | |
1759 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ | |
1760 | ||
1761 | tools/%: FORCE | |
1762 | $(Q)mkdir -p $(objtree)/tools | |
1763 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* | |
1764 | ||
1765 | # Single targets | |
1766 | # --------------------------------------------------------------------------- | |
1767 | # To build individual files in subdirectories, you can do like this: | |
1768 | # | |
1769 | # make foo/bar/baz.s | |
1770 | # | |
1771 | # The supported suffixes for single-target are listed in 'single-targets' | |
1772 | # | |
1773 | # To build only under specific subdirectories, you can do like this: | |
1774 | # | |
1775 | # make foo/bar/baz/ | |
1776 | ||
1777 | ifdef single-build | |
1778 | ||
1779 | single-all := $(filter $(single-targets), $(MAKECMDGOALS)) | |
1780 | ||
1781 | # .ko is special because modpost is needed | |
1782 | single-ko := $(sort $(filter %.ko, $(single-all))) | |
1783 | single-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all))) | |
1784 | ||
1785 | $(single-ko): single_modpost | |
1786 | @: | |
1787 | $(single-no-ko): descend | |
1788 | @: | |
1789 | ||
1790 | ifeq ($(KBUILD_EXTMOD),) | |
1791 | # For the single build of in-tree modules, use a temporary file to avoid | |
1792 | # the situation of modules_install installing an invalid modules.order. | |
1793 | MODORDER := .modules.tmp | |
1794 | endif | |
1795 | ||
1796 | PHONY += single_modpost | |
1797 | single_modpost: $(single-no-ko) | |
1798 | $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) | |
1799 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1800 | ||
1801 | KBUILD_MODULES := 1 | |
1802 | ||
1803 | export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) | |
1804 | ||
1805 | single-build = $(if $(filter-out $@/, $(single-no-ko)),1) | |
1806 | ||
1807 | endif | |
1808 | ||
1809 | # FIXME Should go into a make.lib or something | |
1810 | # =========================================================================== | |
1811 | ||
1812 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1813 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1814 | ||
1815 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1816 | cmd_rmfiles = rm -f $(rm-files) | |
1817 | ||
1818 | # Run depmod only if we have System.map and depmod is executable | |
1819 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1820 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ | |
1821 | $(KERNELRELEASE) | |
1822 | ||
1823 | # read saved command lines for existing targets | |
1824 | existing-targets := $(wildcard $(sort $(targets))) | |
1825 | ||
1826 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
1827 | ||
1828 | endif # config-targets | |
1829 | endif # mixed-build | |
1830 | endif # need-sub-make | |
1831 | ||
1832 | PHONY += FORCE | |
1833 | FORCE: | |
1834 | ||
1835 | # Declare the contents of the PHONY variable as phony. We keep that | |
1836 | # information in a variable so we can use it in if_changed and friends. | |
1837 | .PHONY: $(PHONY) |