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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | VERSION = 5 | |
3 | PATCHLEVEL = 1 | |
4 | SUBLEVEL = 0 | |
5 | EXTRAVERSION = -rc5 | |
6 | NAME = Shy Crocodile | |
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 --%,$(MAKEFLAGS))),) | |
94 | quiet=silent_ | |
95 | endif | |
96 | ||
97 | export quiet Q KBUILD_VERBOSE | |
98 | ||
99 | # kbuild supports saving output files in a separate directory. | |
100 | # To locate output files in a separate directory two syntaxes are supported. | |
101 | # In both cases the working directory must be the root of the kernel src. | |
102 | # 1) O= | |
103 | # Use "make O=dir/to/store/output/files/" | |
104 | # | |
105 | # 2) Set KBUILD_OUTPUT | |
106 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
107 | # where the output files shall be placed. | |
108 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
109 | # make | |
110 | # | |
111 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
112 | # variable. | |
113 | ||
114 | # KBUILD_SRC is not intended to be used by the regular user (for now), | |
115 | # it is set on invocation of make with KBUILD_OUTPUT or O= specified. | |
116 | ||
117 | # OK, Make called in directory where kernel src resides | |
118 | # Do we want to locate output files in a separate directory? | |
119 | ifeq ("$(origin O)", "command line") | |
120 | KBUILD_OUTPUT := $(O) | |
121 | endif | |
122 | ||
123 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) | |
124 | $(error main directory cannot contain spaces nor colons) | |
125 | endif | |
126 | ||
127 | ifneq ($(KBUILD_OUTPUT),) | |
128 | # check that the output directory actually exists | |
129 | saved-output := $(KBUILD_OUTPUT) | |
130 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ | |
131 | && pwd) | |
132 | $(if $(KBUILD_OUTPUT),, \ | |
133 | $(error failed to create output directory "$(saved-output)")) | |
134 | ||
135 | # Look for make include files relative to root of kernel src | |
136 | # | |
137 | # This does not become effective immediately because MAKEFLAGS is re-parsed | |
138 | # once after the Makefile is read. It is OK since we are going to invoke | |
139 | # 'sub-make' below. | |
140 | MAKEFLAGS += --include-dir=$(CURDIR) | |
141 | ||
142 | need-sub-make := 1 | |
143 | else | |
144 | ||
145 | # Do not print "Entering directory ..." at all for in-tree build. | |
146 | MAKEFLAGS += --no-print-directory | |
147 | ||
148 | endif # ifneq ($(KBUILD_OUTPUT),) | |
149 | ||
150 | ifneq ($(filter 3.%,$(MAKE_VERSION)),) | |
151 | # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x | |
152 | # We need to invoke sub-make to avoid implicit rules in the top Makefile. | |
153 | need-sub-make := 1 | |
154 | # Cancel implicit rules for this Makefile. | |
155 | $(lastword $(MAKEFILE_LIST)): ; | |
156 | endif | |
157 | ||
158 | export sub_make_done := 1 | |
159 | ||
160 | ifeq ($(need-sub-make),1) | |
161 | ||
162 | PHONY += $(MAKECMDGOALS) sub-make | |
163 | ||
164 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make | |
165 | @: | |
166 | ||
167 | # Invoke a second make in the output directory, passing relevant variables | |
168 | sub-make: | |
169 | $(Q)$(MAKE) \ | |
170 | $(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \ | |
171 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) | |
172 | ||
173 | endif # need-sub-make | |
174 | endif # sub_make_done | |
175 | ||
176 | # We process the rest of the Makefile if this is the final invocation of make | |
177 | ifeq ($(need-sub-make),) | |
178 | ||
179 | # Do not print "Entering directory ...", | |
180 | # but we want to display it when entering to the output directory | |
181 | # so that IDEs/editors are able to understand relative filenames. | |
182 | MAKEFLAGS += --no-print-directory | |
183 | ||
184 | # Call a source code checker (by default, "sparse") as part of the | |
185 | # C compilation. | |
186 | # | |
187 | # Use 'make C=1' to enable checking of only re-compiled files. | |
188 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
189 | # of whether they are re-compiled or not. | |
190 | # | |
191 | # See the file "Documentation/dev-tools/sparse.rst" for more details, | |
192 | # including where to get the "sparse" utility. | |
193 | ||
194 | ifeq ("$(origin C)", "command line") | |
195 | KBUILD_CHECKSRC = $(C) | |
196 | endif | |
197 | ifndef KBUILD_CHECKSRC | |
198 | KBUILD_CHECKSRC = 0 | |
199 | endif | |
200 | ||
201 | # Use make M=dir to specify directory of external module to build | |
202 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
203 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
204 | ifdef SUBDIRS | |
205 | $(warning ================= WARNING ================) | |
206 | $(warning 'SUBDIRS' will be removed after Linux 5.3) | |
207 | $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) | |
208 | $(warning ==========================================) | |
209 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
210 | endif | |
211 | ||
212 | ifeq ("$(origin M)", "command line") | |
213 | KBUILD_EXTMOD := $(M) | |
214 | endif | |
215 | ||
216 | ifeq ($(KBUILD_SRC),) | |
217 | # building in the source tree | |
218 | srctree := . | |
219 | else | |
220 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
221 | # building in a subdirectory of the source tree | |
222 | srctree := .. | |
223 | else | |
224 | srctree := $(KBUILD_SRC) | |
225 | endif | |
226 | endif | |
227 | ||
228 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC | |
229 | ||
230 | objtree := . | |
231 | src := $(srctree) | |
232 | obj := $(objtree) | |
233 | ||
234 | VPATH := $(srctree) | |
235 | ||
236 | export srctree objtree VPATH | |
237 | ||
238 | # To make sure we do not include .config for any of the *config targets | |
239 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
240 | # It is allowed to specify more targets when calling make, including | |
241 | # mixing *config targets and build targets. | |
242 | # For example 'make oldconfig all'. | |
243 | # Detect when mixed targets is specified, and make a second invocation | |
244 | # of make so .config is not included in this case either (for *config). | |
245 | ||
246 | version_h := include/generated/uapi/linux/version.h | |
247 | old_version_h := include/linux/version.h | |
248 | ||
249 | clean-targets := %clean mrproper cleandocs | |
250 | no-dot-config-targets := $(clean-targets) \ | |
251 | cscope gtags TAGS tags help% %docs check% coccicheck \ | |
252 | $(version_h) headers_% archheaders archscripts \ | |
253 | %asm-generic kernelversion %src-pkg | |
254 | no-sync-config-targets := $(no-dot-config-targets) install %install \ | |
255 | kernelrelease | |
256 | ||
257 | config-targets := 0 | |
258 | mixed-targets := 0 | |
259 | dot-config := 1 | |
260 | may-sync-config := 1 | |
261 | ||
262 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
263 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
264 | dot-config := 0 | |
265 | endif | |
266 | endif | |
267 | ||
268 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
269 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
270 | may-sync-config := 0 | |
271 | endif | |
272 | endif | |
273 | ||
274 | ifneq ($(KBUILD_EXTMOD),) | |
275 | may-sync-config := 0 | |
276 | endif | |
277 | ||
278 | ifeq ($(KBUILD_EXTMOD),) | |
279 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
280 | config-targets := 1 | |
281 | ifneq ($(words $(MAKECMDGOALS)),1) | |
282 | mixed-targets := 1 | |
283 | endif | |
284 | endif | |
285 | endif | |
286 | ||
287 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
288 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
289 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
290 | mixed-targets := 1 | |
291 | endif | |
292 | endif | |
293 | ||
294 | # install and modules_install need also be processed one by one | |
295 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
296 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
297 | mixed-targets := 1 | |
298 | endif | |
299 | endif | |
300 | ||
301 | ifeq ($(mixed-targets),1) | |
302 | # =========================================================================== | |
303 | # We're called with mixed targets (*config and build targets). | |
304 | # Handle them one by one. | |
305 | ||
306 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
307 | ||
308 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
309 | @: | |
310 | ||
311 | __build_one_by_one: | |
312 | $(Q)set -e; \ | |
313 | for i in $(MAKECMDGOALS); do \ | |
314 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
315 | done | |
316 | ||
317 | else | |
318 | ||
319 | include scripts/Kbuild.include | |
320 | ||
321 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
322 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
323 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
324 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
325 | ||
326 | include scripts/subarch.include | |
327 | ||
328 | # Cross compiling and selecting different set of gcc/bin-utils | |
329 | # --------------------------------------------------------------------------- | |
330 | # | |
331 | # When performing cross compilation for other architectures ARCH shall be set | |
332 | # to the target architecture. (See arch/* for the possibilities). | |
333 | # ARCH can be set during invocation of make: | |
334 | # make ARCH=ia64 | |
335 | # Another way is to have ARCH set in the environment. | |
336 | # The default ARCH is the host where make is executed. | |
337 | ||
338 | # CROSS_COMPILE specify the prefix used for all executables used | |
339 | # during compilation. Only gcc and related bin-utils executables | |
340 | # are prefixed with $(CROSS_COMPILE). | |
341 | # CROSS_COMPILE can be set on the command line | |
342 | # make CROSS_COMPILE=ia64-linux- | |
343 | # Alternatively CROSS_COMPILE can be set in the environment. | |
344 | # Default value for CROSS_COMPILE is not to prefix executables | |
345 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
346 | ARCH ?= $(SUBARCH) | |
347 | ||
348 | # Architecture as present in compile.h | |
349 | UTS_MACHINE := $(ARCH) | |
350 | SRCARCH := $(ARCH) | |
351 | ||
352 | # Additional ARCH settings for x86 | |
353 | ifeq ($(ARCH),i386) | |
354 | SRCARCH := x86 | |
355 | endif | |
356 | ifeq ($(ARCH),x86_64) | |
357 | SRCARCH := x86 | |
358 | endif | |
359 | ||
360 | # Additional ARCH settings for sparc | |
361 | ifeq ($(ARCH),sparc32) | |
362 | SRCARCH := sparc | |
363 | endif | |
364 | ifeq ($(ARCH),sparc64) | |
365 | SRCARCH := sparc | |
366 | endif | |
367 | ||
368 | # Additional ARCH settings for sh | |
369 | ifeq ($(ARCH),sh64) | |
370 | SRCARCH := sh | |
371 | endif | |
372 | ||
373 | KCONFIG_CONFIG ?= .config | |
374 | export KCONFIG_CONFIG | |
375 | ||
376 | # SHELL used by kbuild | |
377 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
378 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
379 | else echo sh; fi ; fi) | |
380 | ||
381 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) | |
382 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
383 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
384 | ||
385 | HOSTCC = gcc | |
386 | HOSTCXX = g++ | |
387 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ | |
388 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ | |
389 | $(HOSTCFLAGS) | |
390 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
391 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
392 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
393 | ||
394 | # Make variables (CC, etc...) | |
395 | AS = $(CROSS_COMPILE)as | |
396 | LD = $(CROSS_COMPILE)ld | |
397 | CC = $(CROSS_COMPILE)gcc | |
398 | CPP = $(CC) -E | |
399 | AR = $(CROSS_COMPILE)ar | |
400 | NM = $(CROSS_COMPILE)nm | |
401 | STRIP = $(CROSS_COMPILE)strip | |
402 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
403 | OBJDUMP = $(CROSS_COMPILE)objdump | |
404 | LEX = flex | |
405 | YACC = bison | |
406 | AWK = awk | |
407 | INSTALLKERNEL := installkernel | |
408 | DEPMOD = /sbin/depmod | |
409 | PERL = perl | |
410 | PYTHON = python | |
411 | PYTHON2 = python2 | |
412 | PYTHON3 = python3 | |
413 | CHECK = sparse | |
414 | ||
415 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
416 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) | |
417 | NOSTDINC_FLAGS := | |
418 | CFLAGS_MODULE = | |
419 | AFLAGS_MODULE = | |
420 | LDFLAGS_MODULE = | |
421 | CFLAGS_KERNEL = | |
422 | AFLAGS_KERNEL = | |
423 | LDFLAGS_vmlinux = | |
424 | ||
425 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
426 | USERINCLUDE := \ | |
427 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ | |
428 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
429 | -I$(srctree)/include/uapi \ | |
430 | -I$(objtree)/include/generated/uapi \ | |
431 | -include $(srctree)/include/linux/kconfig.h | |
432 | ||
433 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
434 | # Needed to be compatible with the O= option | |
435 | LINUXINCLUDE := \ | |
436 | -I$(srctree)/arch/$(SRCARCH)/include \ | |
437 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
438 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ | |
439 | -I$(objtree)/include \ | |
440 | $(USERINCLUDE) | |
441 | ||
442 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE | |
443 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ | |
444 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ | |
445 | -Werror=implicit-function-declaration -Werror=implicit-int \ | |
446 | -Wno-format-security \ | |
447 | -std=gnu89 | |
448 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
449 | KBUILD_AFLAGS_KERNEL := | |
450 | KBUILD_CFLAGS_KERNEL := | |
451 | KBUILD_AFLAGS_MODULE := -DMODULE | |
452 | KBUILD_CFLAGS_MODULE := -DMODULE | |
453 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
454 | KBUILD_LDFLAGS := | |
455 | GCC_PLUGINS_CFLAGS := | |
456 | ||
457 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC | |
458 | export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS | |
459 | export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE | |
460 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
461 | ||
462 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS | |
463 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | |
464 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
465 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
466 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
467 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL | |
468 | export KBUILD_ARFLAGS | |
469 | ||
470 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
471 | # tree rather than in the kernel tree. The kernel tree might | |
472 | # even be read-only. | |
473 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
474 | ||
475 | # Files to ignore in find ... statements | |
476 | ||
477 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ | |
478 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
479 | -prune -o | |
480 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ | |
481 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
482 | ||
483 | # =========================================================================== | |
484 | # Rules shared between *config targets and build targets | |
485 | ||
486 | # Basic helpers built in scripts/basic/ | |
487 | PHONY += scripts_basic | |
488 | scripts_basic: | |
489 | $(Q)$(MAKE) $(build)=scripts/basic | |
490 | $(Q)rm -f .tmp_quiet_recordmcount | |
491 | ||
492 | PHONY += outputmakefile | |
493 | # outputmakefile generates a Makefile in the output directory, if using a | |
494 | # separate output directory. This allows convenient use of make in the | |
495 | # output directory. | |
496 | # At the same time when output Makefile generated, generate .gitignore to | |
497 | # ignore whole output directory | |
498 | outputmakefile: | |
499 | ifneq ($(KBUILD_SRC),) | |
500 | $(Q)ln -fsn $(srctree) source | |
501 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) | |
502 | $(Q)test -e .gitignore || \ | |
503 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
504 | endif | |
505 | ||
506 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) | |
507 | ifneq ($(CROSS_COMPILE),) | |
508 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) | |
509 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) | |
510 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) | |
511 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) | |
512 | endif | |
513 | ifneq ($(GCC_TOOLCHAIN),) | |
514 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) | |
515 | endif | |
516 | CLANG_FLAGS += -no-integrated-as | |
517 | KBUILD_CFLAGS += $(CLANG_FLAGS) | |
518 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
519 | export CLANG_FLAGS | |
520 | endif | |
521 | ||
522 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register | |
523 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
524 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
525 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
526 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
527 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
528 | export RETPOLINE_CFLAGS | |
529 | export RETPOLINE_VDSO_CFLAGS | |
530 | ||
531 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. | |
532 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
533 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
534 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
535 | CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) | |
536 | ||
537 | ifeq ($(config-targets),1) | |
538 | # =========================================================================== | |
539 | # *config targets only - make sure prerequisites are updated, and descend | |
540 | # in scripts/kconfig to make the *config target | |
541 | ||
542 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
543 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
544 | # used for 'make defconfig' | |
545 | include arch/$(SRCARCH)/Makefile | |
546 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT | |
547 | ||
548 | config: scripts_basic outputmakefile FORCE | |
549 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
550 | ||
551 | %config: scripts_basic outputmakefile FORCE | |
552 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
553 | ||
554 | else | |
555 | # =========================================================================== | |
556 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
557 | # targets and others. In general all targets except *config targets. | |
558 | ||
559 | # If building an external module we do not care about the all: rule | |
560 | # but instead _all depend on modules | |
561 | PHONY += all | |
562 | ifeq ($(KBUILD_EXTMOD),) | |
563 | _all: all | |
564 | else | |
565 | _all: modules | |
566 | endif | |
567 | ||
568 | # Decide whether to build built-in, modular, or both. | |
569 | # Normally, just do built-in. | |
570 | ||
571 | KBUILD_MODULES := | |
572 | KBUILD_BUILTIN := 1 | |
573 | ||
574 | # If we have only "make modules", don't compile built-in objects. | |
575 | # When we're building modules with modversions, we need to consider | |
576 | # the built-in objects during the descend as well, in order to | |
577 | # make sure the checksums are up to date before we record them. | |
578 | ||
579 | ifeq ($(MAKECMDGOALS),modules) | |
580 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
581 | endif | |
582 | ||
583 | # If we have "make <whatever> modules", compile modules | |
584 | # in addition to whatever we do anyway. | |
585 | # Just "make" or "make all" shall build modules as well | |
586 | ||
587 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
588 | KBUILD_MODULES := 1 | |
589 | endif | |
590 | ||
591 | ifeq ($(MAKECMDGOALS),) | |
592 | KBUILD_MODULES := 1 | |
593 | endif | |
594 | ||
595 | export KBUILD_MODULES KBUILD_BUILTIN | |
596 | ||
597 | ifeq ($(KBUILD_EXTMOD),) | |
598 | # Objects we will link into vmlinux / subdirs we need to visit | |
599 | init-y := init/ | |
600 | drivers-y := drivers/ sound/ | |
601 | net-y := net/ | |
602 | libs-y := lib/ | |
603 | core-y := usr/ | |
604 | virt-y := virt/ | |
605 | endif # KBUILD_EXTMOD | |
606 | ||
607 | ifeq ($(dot-config),1) | |
608 | include include/config/auto.conf | |
609 | endif | |
610 | ||
611 | # The all: target is the default when no target is given on the | |
612 | # command line. | |
613 | # This allow a user to issue only 'make' to build a kernel including modules | |
614 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
615 | all: vmlinux | |
616 | ||
617 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
618 | $(call cc-option,-fno-tree-loop-im) \ | |
619 | $(call cc-disable-warning,maybe-uninitialized,) | |
620 | export CFLAGS_GCOV | |
621 | ||
622 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. | |
623 | ifdef CONFIG_FUNCTION_TRACER | |
624 | CC_FLAGS_FTRACE := -pg | |
625 | endif | |
626 | ||
627 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default | |
628 | # values of the respective KBUILD_* variables | |
629 | ARCH_CPPFLAGS := | |
630 | ARCH_AFLAGS := | |
631 | ARCH_CFLAGS := | |
632 | include arch/$(SRCARCH)/Makefile | |
633 | ||
634 | ifeq ($(dot-config),1) | |
635 | ifeq ($(may-sync-config),1) | |
636 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if | |
637 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
638 | # because some architectures define CROSS_COMPILE there. | |
639 | -include include/config/auto.conf.cmd | |
640 | ||
641 | $(KCONFIG_CONFIG): | |
642 | @echo >&2 '***' | |
643 | @echo >&2 '*** Configuration file "$@" not found!' | |
644 | @echo >&2 '***' | |
645 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
646 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
647 | @echo >&2 '***' | |
648 | @/bin/false | |
649 | ||
650 | # The actual configuration files used during the build are stored in | |
651 | # include/generated/ and include/config/. Update them if .config is newer than | |
652 | # include/config/auto.conf (which mirrors .config). | |
653 | # | |
654 | # This exploits the 'multi-target pattern rule' trick. | |
655 | # The syncconfig should be executed only once to make all the targets. | |
656 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) | |
657 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
658 | else | |
659 | # External modules and some install targets need include/generated/autoconf.h | |
660 | # and include/config/auto.conf but do not care if they are up-to-date. | |
661 | # Use auto.conf to trigger the test | |
662 | PHONY += include/config/auto.conf | |
663 | ||
664 | include/config/auto.conf: | |
665 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ | |
666 | echo >&2; \ | |
667 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
668 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
669 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
670 | echo >&2 ; \ | |
671 | /bin/false) | |
672 | ||
673 | endif # may-sync-config | |
674 | endif # $(dot-config) | |
675 | ||
676 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) | |
677 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) | |
678 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) | |
679 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
680 | KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) | |
681 | ||
682 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
683 | KBUILD_CFLAGS += -Os | |
684 | else | |
685 | KBUILD_CFLAGS += -O2 | |
686 | endif | |
687 | ||
688 | ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED | |
689 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
690 | endif | |
691 | ||
692 | # Tell gcc to never replace conditional load with a non-conditional one | |
693 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
694 | ||
695 | include scripts/Makefile.kcov | |
696 | include scripts/Makefile.gcc-plugins | |
697 | ||
698 | ifdef CONFIG_READABLE_ASM | |
699 | # Disable optimizations that make assembler listings hard to read. | |
700 | # reorder blocks reorders the control in the function | |
701 | # ipa clone creates specialized cloned functions | |
702 | # partial inlining inlines only parts of functions | |
703 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
704 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
705 | $(call cc-option,-fno-partial-inlining) | |
706 | endif | |
707 | ||
708 | ifneq ($(CONFIG_FRAME_WARN),0) | |
709 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) | |
710 | endif | |
711 | ||
712 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector | |
713 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector | |
714 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
715 | ||
716 | KBUILD_CFLAGS += $(stackp-flags-y) | |
717 | ||
718 | ifdef CONFIG_CC_IS_CLANG | |
719 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) | |
720 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) | |
721 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
722 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
723 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
724 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
725 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
726 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
727 | # See modpost pattern 2 | |
728 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
729 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) | |
730 | else | |
731 | ||
732 | # These warnings generated too much noise in a regular build. | |
733 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
734 | KBUILD_CFLAGS += -Wno-unused-but-set-variable | |
735 | endif | |
736 | ||
737 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) | |
738 | ifdef CONFIG_FRAME_POINTER | |
739 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
740 | else | |
741 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
742 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
743 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
744 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
745 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
746 | ifndef CONFIG_FUNCTION_TRACER | |
747 | KBUILD_CFLAGS += -fomit-frame-pointer | |
748 | endif | |
749 | endif | |
750 | ||
751 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) | |
752 | ||
753 | ifdef CONFIG_DEBUG_INFO | |
754 | ifdef CONFIG_DEBUG_INFO_SPLIT | |
755 | DEBUG_CFLAGS += -gsplit-dwarf | |
756 | else | |
757 | DEBUG_CFLAGS += -g | |
758 | endif | |
759 | KBUILD_AFLAGS += -Wa,-gdwarf-2 | |
760 | endif | |
761 | ifdef CONFIG_DEBUG_INFO_DWARF4 | |
762 | DEBUG_CFLAGS += -gdwarf-4 | |
763 | endif | |
764 | ||
765 | ifdef CONFIG_DEBUG_INFO_REDUCED | |
766 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ | |
767 | $(call cc-option,-fno-var-tracking) | |
768 | endif | |
769 | ||
770 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) | |
771 | export DEBUG_CFLAGS | |
772 | ||
773 | ifdef CONFIG_FUNCTION_TRACER | |
774 | ifdef CONFIG_FTRACE_MCOUNT_RECORD | |
775 | # gcc 5 supports generating the mcount tables directly | |
776 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
777 | CC_FLAGS_FTRACE += -mrecord-mcount | |
778 | export CC_USING_RECORD_MCOUNT := 1 | |
779 | endif | |
780 | ifdef CONFIG_HAVE_NOP_MCOUNT | |
781 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
782 | CC_FLAGS_FTRACE += -mnop-mcount | |
783 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
784 | endif | |
785 | endif | |
786 | endif | |
787 | ifdef CONFIG_HAVE_FENTRY | |
788 | ifeq ($(call cc-option-yn, -mfentry),y) | |
789 | CC_FLAGS_FTRACE += -mfentry | |
790 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
791 | endif | |
792 | endif | |
793 | export CC_FLAGS_FTRACE | |
794 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
795 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
796 | ifdef CONFIG_DYNAMIC_FTRACE | |
797 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
798 | BUILD_C_RECORDMCOUNT := y | |
799 | export BUILD_C_RECORDMCOUNT | |
800 | endif | |
801 | endif | |
802 | endif | |
803 | ||
804 | # We trigger additional mismatches with less inlining | |
805 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
806 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
807 | endif | |
808 | ||
809 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
810 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections | |
811 | LDFLAGS_vmlinux += --gc-sections | |
812 | endif | |
813 | ||
814 | # arch Makefile may override CC so keep this after arch Makefile is included | |
815 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | |
816 | ||
817 | # warn about C99 declaration after statement | |
818 | KBUILD_CFLAGS += -Wdeclaration-after-statement | |
819 | ||
820 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel | |
821 | KBUILD_CFLAGS += $(call cc-option,-Wvla) | |
822 | ||
823 | # disable pointer signed / unsigned warnings in gcc 4.0 | |
824 | KBUILD_CFLAGS += -Wno-pointer-sign | |
825 | ||
826 | # disable stringop warnings in gcc 8+ | |
827 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
828 | ||
829 | # disable invalid "can't wrap" optimizations for signed / pointers | |
830 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) | |
831 | ||
832 | # clang sets -fmerge-all-constants by default as optimization, but this | |
833 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
834 | # need to disable it here generally. | |
835 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
836 | ||
837 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
838 | # to have actual conforming behavior enabled. | |
839 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
840 | ||
841 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) | |
842 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
843 | ||
844 | # conserve stack if available | |
845 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
846 | ||
847 | # Prohibit date/time macros, which would make the build non-deterministic | |
848 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
849 | ||
850 | # enforce correct pointer usage | |
851 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
852 | ||
853 | # Require designated initializers for all marked structures | |
854 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
855 | ||
856 | # change __FILE__ to the relative path from the srctree | |
857 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
858 | ||
859 | # use the deterministic mode of AR if available | |
860 | KBUILD_ARFLAGS := $(call ar-option,D) | |
861 | ||
862 | include scripts/Makefile.kasan | |
863 | include scripts/Makefile.extrawarn | |
864 | include scripts/Makefile.ubsan | |
865 | ||
866 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the | |
867 | # last assignments | |
868 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
869 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
870 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
871 | ||
872 | # Use --build-id when available. | |
873 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) | |
874 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) | |
875 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) | |
876 | ||
877 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
878 | LDFLAGS_vmlinux += $(call ld-option, -X,) | |
879 | endif | |
880 | ||
881 | # insure the checker run with the right endianness | |
882 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
883 | ||
884 | # the checker needs the correct machine size | |
885 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
886 | ||
887 | # Default kernel image to build when no specific target is given. | |
888 | # KBUILD_IMAGE may be overruled on the command line or | |
889 | # set in the environment | |
890 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
891 | # this default value | |
892 | export KBUILD_IMAGE ?= vmlinux | |
893 | ||
894 | # | |
895 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
896 | # images. Default is /boot, but you can set it to other values | |
897 | export INSTALL_PATH ?= /boot | |
898 | ||
899 | # | |
900 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
901 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
902 | # an argument if needed. Otherwise it defaults to the kernel install path | |
903 | # | |
904 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
905 | ||
906 | # | |
907 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
908 | # relocations required by build roots. This is not defined in the | |
909 | # makefile but the argument can be passed to make if needed. | |
910 | # | |
911 | ||
912 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
913 | export MODLIB | |
914 | ||
915 | # | |
916 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
917 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
918 | # the default option --strip-debug will be used. Otherwise, | |
919 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
920 | ||
921 | ifdef INSTALL_MOD_STRIP | |
922 | ifeq ($(INSTALL_MOD_STRIP),1) | |
923 | mod_strip_cmd = $(STRIP) --strip-debug | |
924 | else | |
925 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
926 | endif # INSTALL_MOD_STRIP=1 | |
927 | else | |
928 | mod_strip_cmd = true | |
929 | endif # INSTALL_MOD_STRIP | |
930 | export mod_strip_cmd | |
931 | ||
932 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed | |
933 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
934 | # or CONFIG_MODULE_COMPRESS_XZ. | |
935 | ||
936 | mod_compress_cmd = true | |
937 | ifdef CONFIG_MODULE_COMPRESS | |
938 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
939 | mod_compress_cmd = gzip -n -f | |
940 | endif # CONFIG_MODULE_COMPRESS_GZIP | |
941 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
942 | mod_compress_cmd = xz -f | |
943 | endif # CONFIG_MODULE_COMPRESS_XZ | |
944 | endif # CONFIG_MODULE_COMPRESS | |
945 | export mod_compress_cmd | |
946 | ||
947 | ifdef CONFIG_MODULE_SIG_ALL | |
948 | $(eval $(call config_filename,MODULE_SIG_KEY)) | |
949 | ||
950 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
951 | else | |
952 | mod_sign_cmd = true | |
953 | endif | |
954 | export mod_sign_cmd | |
955 | ||
956 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) | |
957 | ||
958 | ifdef CONFIG_STACK_VALIDATION | |
959 | has_libelf := $(call try-run,\ | |
960 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) | |
961 | ifeq ($(has_libelf),1) | |
962 | objtool_target := tools/objtool FORCE | |
963 | else | |
964 | SKIP_STACK_VALIDATION := 1 | |
965 | export SKIP_STACK_VALIDATION | |
966 | endif | |
967 | endif | |
968 | ||
969 | PHONY += prepare0 | |
970 | ||
971 | ifeq ($(KBUILD_EXTMOD),) | |
972 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ | |
973 | ||
974 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
975 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
976 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) | |
977 | ||
978 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
979 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) | |
980 | ||
981 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) | |
982 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
983 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
984 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
985 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
986 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) | |
987 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
988 | ||
989 | # Externally visible symbols (used by link-vmlinux.sh) | |
990 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ | |
991 | $(drivers-y) $(net-y) $(virt-y) | |
992 | export KBUILD_VMLINUX_LIBS := $(libs-y1) | |
993 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
994 | export LDFLAGS_vmlinux | |
995 | # used by scripts/package/Makefile | |
996 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) | |
997 | ||
998 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) | |
999 | ||
1000 | # Recurse until adjust_autoksyms.sh is satisfied | |
1001 | PHONY += autoksyms_recursive | |
1002 | autoksyms_recursive: $(vmlinux-deps) | |
1003 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1004 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ | |
1005 | "$(MAKE) -f $(srctree)/Makefile vmlinux" | |
1006 | endif | |
1007 | ||
1008 | # For the kernel to actually contain only the needed exported symbols, | |
1009 | # we have to build modules as well to determine what those symbols are. | |
1010 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1011 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1012 | KBUILD_MODULES := 1 | |
1013 | endif | |
1014 | ||
1015 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) | |
1016 | ||
1017 | $(autoksyms_h): | |
1018 | $(Q)mkdir -p $(dir $@) | |
1019 | $(Q)touch $@ | |
1020 | ||
1021 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) | |
1022 | ||
1023 | # Final link of vmlinux with optional arch pass after final link | |
1024 | cmd_link-vmlinux = \ | |
1025 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ | |
1026 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) | |
1027 | ||
1028 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE | |
1029 | +$(call if_changed,link-vmlinux) | |
1030 | ||
1031 | targets := vmlinux | |
1032 | ||
1033 | # Build samples along the rest of the kernel. This needs headers_install. | |
1034 | ifdef CONFIG_SAMPLES | |
1035 | vmlinux-dirs += samples | |
1036 | samples: headers_install | |
1037 | endif | |
1038 | ||
1039 | # The actual objects are generated when descending, | |
1040 | # make sure no implicit rule kicks in | |
1041 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; | |
1042 | ||
1043 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1044 | # Preset locale variables to speed up the build process. Limit locale | |
1045 | # tweaks to this spot to avoid wrong language settings when running | |
1046 | # make menuconfig etc. | |
1047 | # Error messages still appears in the original language | |
1048 | ||
1049 | PHONY += $(vmlinux-dirs) | |
1050 | $(vmlinux-dirs): prepare | |
1051 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 | |
1052 | ||
1053 | filechk_kernel.release = \ | |
1054 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1055 | ||
1056 | # Store (new) KERNELRELEASE string in include/config/kernel.release | |
1057 | include/config/kernel.release: $(srctree)/Makefile FORCE | |
1058 | $(call filechk,kernel.release) | |
1059 | ||
1060 | # Additional helpers built in scripts/ | |
1061 | # Carefully list dependencies so we do not try to build scripts twice | |
1062 | # in parallel | |
1063 | PHONY += scripts | |
1064 | scripts: scripts_basic scripts_dtc | |
1065 | $(Q)$(MAKE) $(build)=$(@) | |
1066 | ||
1067 | # Things we need to do before we recursively start building the kernel | |
1068 | # or the modules are listed in "prepare". | |
1069 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1070 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1071 | # version.h and scripts_basic is processed / created. | |
1072 | ||
1073 | PHONY += prepare archprepare prepare1 prepare3 | |
1074 | ||
1075 | # prepare3 is used to check if we are building in a separate output directory, | |
1076 | # and if so do: | |
1077 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
1078 | prepare3: include/config/kernel.release | |
1079 | ifneq ($(KBUILD_SRC),) | |
1080 | @$(kecho) ' Using $(srctree) as source for kernel' | |
1081 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ | |
1082 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ | |
1083 | echo >&2 " in the '$(srctree)' directory.";\ | |
1084 | /bin/false; \ | |
1085 | fi; | |
1086 | endif | |
1087 | ||
1088 | prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ | |
1089 | include/generated/utsrelease.h | |
1090 | $(cmd_crmodverdir) | |
1091 | ||
1092 | archprepare: archheaders archscripts prepare1 scripts | |
1093 | ||
1094 | prepare0: archprepare | |
1095 | $(Q)$(MAKE) $(build)=scripts/mod | |
1096 | $(Q)$(MAKE) $(build)=. | |
1097 | ||
1098 | # All the preparing.. | |
1099 | prepare: prepare0 prepare-objtool | |
1100 | ||
1101 | # Support for using generic headers in asm-generic | |
1102 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj | |
1103 | ||
1104 | PHONY += asm-generic uapi-asm-generic | |
1105 | asm-generic: uapi-asm-generic | |
1106 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ | |
1107 | generic=include/asm-generic | |
1108 | uapi-asm-generic: | |
1109 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ | |
1110 | generic=include/uapi/asm-generic | |
1111 | ||
1112 | PHONY += prepare-objtool | |
1113 | prepare-objtool: $(objtool_target) | |
1114 | ifeq ($(SKIP_STACK_VALIDATION),1) | |
1115 | ifdef CONFIG_UNWINDER_ORC | |
1116 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1117 | @false | |
1118 | else | |
1119 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1120 | endif | |
1121 | endif | |
1122 | ||
1123 | # Generate some files | |
1124 | # --------------------------------------------------------------------------- | |
1125 | ||
1126 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1127 | # needs to be updated, so this check is forced on all builds | |
1128 | ||
1129 | uts_len := 64 | |
1130 | define filechk_utsrelease.h | |
1131 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1132 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1133 | exit 1; \ | |
1134 | fi; \ | |
1135 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" | |
1136 | endef | |
1137 | ||
1138 | define filechk_version.h | |
1139 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1140 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
1141 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' | |
1142 | endef | |
1143 | ||
1144 | $(version_h): FORCE | |
1145 | $(call filechk,version.h) | |
1146 | $(Q)rm -f $(old_version_h) | |
1147 | ||
1148 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1149 | $(call filechk,utsrelease.h) | |
1150 | ||
1151 | PHONY += headerdep | |
1152 | headerdep: | |
1153 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
1154 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
1155 | ||
1156 | # --------------------------------------------------------------------------- | |
1157 | # Kernel headers | |
1158 | ||
1159 | #Default location for installed headers | |
1160 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1161 | ||
1162 | # If we do an all arch process set dst to include/arch-$(SRCARCH) | |
1163 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) | |
1164 | ||
1165 | PHONY += archheaders archscripts | |
1166 | ||
1167 | PHONY += __headers | |
1168 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts | |
1169 | $(Q)$(MAKE) $(build)=scripts build_unifdef | |
1170 | ||
1171 | PHONY += headers_install_all | |
1172 | headers_install_all: | |
1173 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
1174 | ||
1175 | PHONY += headers_install | |
1176 | headers_install: __headers | |
1177 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ | |
1178 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
1179 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include | |
1180 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) | |
1181 | ||
1182 | PHONY += headers_check_all | |
1183 | headers_check_all: headers_install_all | |
1184 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check | |
1185 | ||
1186 | PHONY += headers_check | |
1187 | headers_check: headers_install | |
1188 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 | |
1189 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 | |
1190 | ||
1191 | ifdef CONFIG_HEADERS_CHECK | |
1192 | all: headers_check | |
1193 | endif | |
1194 | ||
1195 | # --------------------------------------------------------------------------- | |
1196 | # Kernel selftest | |
1197 | ||
1198 | PHONY += kselftest | |
1199 | kselftest: | |
1200 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests | |
1201 | ||
1202 | PHONY += kselftest-clean | |
1203 | kselftest-clean: | |
1204 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean | |
1205 | ||
1206 | PHONY += kselftest-merge | |
1207 | kselftest-merge: | |
1208 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1209 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ | |
1210 | -m $(objtree)/.config \ | |
1211 | $(srctree)/tools/testing/selftests/*/config | |
1212 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1213 | ||
1214 | # --------------------------------------------------------------------------- | |
1215 | # Devicetree files | |
1216 | ||
1217 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1218 | dtstree := arch/$(SRCARCH)/boot/dts | |
1219 | endif | |
1220 | ||
1221 | ifneq ($(dtstree),) | |
1222 | ||
1223 | %.dtb: prepare3 scripts_dtc | |
1224 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1225 | ||
1226 | PHONY += dtbs dtbs_install dt_binding_check | |
1227 | dtbs dtbs_check: prepare3 scripts_dtc | |
1228 | $(Q)$(MAKE) $(build)=$(dtstree) | |
1229 | ||
1230 | dtbs_check: export CHECK_DTBS=1 | |
1231 | dtbs_check: dt_binding_check | |
1232 | ||
1233 | dtbs_install: | |
1234 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1235 | ||
1236 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1237 | all: dtbs | |
1238 | endif | |
1239 | ||
1240 | endif | |
1241 | ||
1242 | PHONY += scripts_dtc | |
1243 | scripts_dtc: scripts_basic | |
1244 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1245 | ||
1246 | dt_binding_check: scripts_dtc | |
1247 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1248 | ||
1249 | # --------------------------------------------------------------------------- | |
1250 | # Modules | |
1251 | ||
1252 | ifdef CONFIG_MODULES | |
1253 | ||
1254 | # By default, build modules as well | |
1255 | ||
1256 | all: modules | |
1257 | ||
1258 | # Build modules | |
1259 | # | |
1260 | # A module can be listed more than once in obj-m resulting in | |
1261 | # duplicate lines in modules.order files. Those are removed | |
1262 | # using awk while concatenating to the final file. | |
1263 | ||
1264 | PHONY += modules | |
1265 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin | |
1266 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order | |
1267 | @$(kecho) ' Building modules, stage 2.'; | |
1268 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1269 | ||
1270 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) | |
1271 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1272 | ||
1273 | %/modules.builtin: include/config/auto.conf include/config/tristate.conf | |
1274 | $(Q)$(MAKE) $(modbuiltin)=$* | |
1275 | ||
1276 | ||
1277 | # Target to prepare building external modules | |
1278 | PHONY += modules_prepare | |
1279 | modules_prepare: prepare | |
1280 | ||
1281 | # Target to install modules | |
1282 | PHONY += modules_install | |
1283 | modules_install: _modinst_ _modinst_post | |
1284 | ||
1285 | PHONY += _modinst_ | |
1286 | _modinst_: | |
1287 | @rm -rf $(MODLIB)/kernel | |
1288 | @rm -f $(MODLIB)/source | |
1289 | @mkdir -p $(MODLIB)/kernel | |
1290 | @ln -s $(abspath $(srctree)) $(MODLIB)/source | |
1291 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1292 | rm -f $(MODLIB)/build ; \ | |
1293 | ln -s $(CURDIR) $(MODLIB)/build ; \ | |
1294 | fi | |
1295 | @cp -f $(objtree)/modules.order $(MODLIB)/ | |
1296 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ | |
1297 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1298 | ||
1299 | # This depmod is only for convenience to give the initial | |
1300 | # boot a modules.dep even before / is mounted read-write. However the | |
1301 | # boot script depmod is the master version. | |
1302 | PHONY += _modinst_post | |
1303 | _modinst_post: _modinst_ | |
1304 | $(call cmd,depmod) | |
1305 | ||
1306 | ifeq ($(CONFIG_MODULE_SIG), y) | |
1307 | PHONY += modules_sign | |
1308 | modules_sign: | |
1309 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1310 | endif | |
1311 | ||
1312 | else # CONFIG_MODULES | |
1313 | ||
1314 | # Modules not configured | |
1315 | # --------------------------------------------------------------------------- | |
1316 | ||
1317 | PHONY += modules modules_install | |
1318 | modules modules_install: | |
1319 | @echo >&2 | |
1320 | @echo >&2 "The present kernel configuration has modules disabled." | |
1321 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1322 | @echo >&2 "Then build a kernel with module support enabled." | |
1323 | @echo >&2 | |
1324 | @exit 1 | |
1325 | ||
1326 | endif # CONFIG_MODULES | |
1327 | ||
1328 | ### | |
1329 | # Cleaning is done on three levels. | |
1330 | # make clean Delete most generated files | |
1331 | # Leave enough to build external modules | |
1332 | # make mrproper Delete the current configuration, and all generated files | |
1333 | # make distclean Remove editor backup files, patch leftover files and the like | |
1334 | ||
1335 | # Directories & files removed with 'make clean' | |
1336 | CLEAN_DIRS += $(MODVERDIR) include/ksym | |
1337 | ||
1338 | # Directories & files removed with 'make mrproper' | |
1339 | MRPROPER_DIRS += include/config usr/include include/generated \ | |
1340 | arch/*/include/generated .tmp_objdiff | |
1341 | MRPROPER_FILES += .config .config.old .version \ | |
1342 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ | |
1343 | signing_key.pem signing_key.priv signing_key.x509 \ | |
1344 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
1345 | signing_key.x509.signer vmlinux-gdb.py | |
1346 | ||
1347 | # clean - Delete most, but leave enough to build external modules | |
1348 | # | |
1349 | clean: rm-dirs := $(CLEAN_DIRS) | |
1350 | clean: rm-files := $(CLEAN_FILES) | |
1351 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) | |
1352 | ||
1353 | PHONY += $(clean-dirs) clean archclean vmlinuxclean | |
1354 | $(clean-dirs): | |
1355 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1356 | ||
1357 | vmlinuxclean: | |
1358 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1359 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) | |
1360 | ||
1361 | clean: archclean vmlinuxclean | |
1362 | ||
1363 | # mrproper - Delete all generated files, including .config | |
1364 | # | |
1365 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1366 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1367 | mrproper-dirs := $(addprefix _mrproper_,scripts) | |
1368 | ||
1369 | PHONY += $(mrproper-dirs) mrproper | |
1370 | $(mrproper-dirs): | |
1371 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1372 | ||
1373 | mrproper: clean $(mrproper-dirs) | |
1374 | $(call cmd,rmdirs) | |
1375 | $(call cmd,rmfiles) | |
1376 | ||
1377 | # distclean | |
1378 | # | |
1379 | PHONY += distclean | |
1380 | ||
1381 | distclean: mrproper | |
1382 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
1383 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1384 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ | |
1385 | -o -name 'core' \) \ | |
1386 | -type f -print | xargs rm -f | |
1387 | ||
1388 | ||
1389 | # Packaging of the kernel to various formats | |
1390 | # --------------------------------------------------------------------------- | |
1391 | package-dir := scripts/package | |
1392 | ||
1393 | %src-pkg: FORCE | |
1394 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1395 | %pkg: include/config/kernel.release FORCE | |
1396 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1397 | ||
1398 | ||
1399 | # Brief documentation of the typical targets used | |
1400 | # --------------------------------------------------------------------------- | |
1401 | ||
1402 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1403 | boards := $(sort $(notdir $(boards))) | |
1404 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1405 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1406 | ||
1407 | PHONY += help | |
1408 | help: | |
1409 | @echo 'Cleaning targets:' | |
1410 | @echo ' clean - Remove most generated files but keep the config and' | |
1411 | @echo ' enough build support to build external modules' | |
1412 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1413 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1414 | @echo '' | |
1415 | @echo 'Configuration targets:' | |
1416 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1417 | @echo '' | |
1418 | @echo 'Other generic targets:' | |
1419 | @echo ' all - Build all targets marked with [*]' | |
1420 | @echo '* vmlinux - Build the bare kernel' | |
1421 | @echo '* modules - Build all modules' | |
1422 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1423 | @echo ' dir/ - Build all files in dir and below' | |
1424 | @echo ' dir/file.[ois] - Build specified target only' | |
1425 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1426 | @echo ' (requires compiler support for LLVM assembly generation)' | |
1427 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1428 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1429 | @echo ' dir/file.ko - Build module including final link' | |
1430 | @echo ' modules_prepare - Set up for building external modules' | |
1431 | @echo ' tags/TAGS - Generate tags file for editors' | |
1432 | @echo ' cscope - Generate cscope index' | |
1433 | @echo ' gtags - Generate GNU GLOBAL index' | |
1434 | @echo ' kernelrelease - Output the release version string (use with make -s)' | |
1435 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1436 | @echo ' image_name - Output the image name (use with make -s)' | |
1437 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1438 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1439 | echo '' | |
1440 | @echo 'Static analysers:' | |
1441 | @echo ' checkstack - Generate a list of stack hogs' | |
1442 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1443 | @echo ' versioncheck - Sanity check on version.h usage' | |
1444 | @echo ' includecheck - Check for duplicate included header files' | |
1445 | @echo ' export_report - List the usages of all exported symbols' | |
1446 | @echo ' headers_check - Sanity check on exported headers' | |
1447 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1448 | @echo ' coccicheck - Check with Coccinelle' | |
1449 | @echo '' | |
1450 | @echo 'Kernel selftest:' | |
1451 | @echo ' kselftest - Build and run kernel selftest (run as root)' | |
1452 | @echo ' Build, install, and boot kernel before' | |
1453 | @echo ' running kselftest on it' | |
1454 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1455 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' | |
1456 | @echo ' .config.' | |
1457 | @echo '' | |
1458 | @$(if $(dtstree), \ | |
1459 | echo 'Devicetree:'; \ | |
1460 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1461 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1462 | echo '') | |
1463 | ||
1464 | @echo 'Userspace tools targets:' | |
1465 | @echo ' use "make tools/help"' | |
1466 | @echo ' or "cd tools; make help"' | |
1467 | @echo '' | |
1468 | @echo 'Kernel packaging:' | |
1469 | @$(MAKE) $(build)=$(package-dir) help | |
1470 | @echo '' | |
1471 | @echo 'Documentation targets:' | |
1472 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp | |
1473 | @echo '' | |
1474 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1475 | @$(if $(archhelp),$(archhelp),\ | |
1476 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1477 | @echo '' | |
1478 | @$(if $(boards), \ | |
1479 | $(foreach b, $(boards), \ | |
1480 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1481 | echo '') | |
1482 | @$(if $(board-dirs), \ | |
1483 | $(foreach b, $(board-dirs), \ | |
1484 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1485 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1486 | echo '') | |
1487 | ||
1488 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1489 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' | |
1490 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1491 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' | |
1492 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1493 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1494 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' | |
1495 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1496 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1497 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1498 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1499 | @echo '' | |
1500 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1501 | @echo 'For further info see the ./README file' | |
1502 | ||
1503 | ||
1504 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1505 | ||
1506 | help-boards: $(help-board-dirs) | |
1507 | ||
1508 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) | |
1509 | ||
1510 | $(help-board-dirs): help-%: | |
1511 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1512 | @$(if $(boards-per-dir), \ | |
1513 | $(foreach b, $(boards-per-dir), \ | |
1514 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1515 | echo '') | |
1516 | ||
1517 | ||
1518 | # Documentation targets | |
1519 | # --------------------------------------------------------------------------- | |
1520 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ | |
1521 | linkcheckdocs dochelp refcheckdocs | |
1522 | PHONY += $(DOC_TARGETS) | |
1523 | $(DOC_TARGETS): scripts_basic FORCE | |
1524 | $(Q)$(MAKE) $(build)=Documentation $@ | |
1525 | ||
1526 | # Misc | |
1527 | # --------------------------------------------------------------------------- | |
1528 | ||
1529 | PHONY += scripts_gdb | |
1530 | scripts_gdb: prepare | |
1531 | $(Q)$(MAKE) $(build)=scripts/gdb | |
1532 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1533 | ||
1534 | ifdef CONFIG_GDB_SCRIPTS | |
1535 | all: scripts_gdb | |
1536 | endif | |
1537 | ||
1538 | else # KBUILD_EXTMOD | |
1539 | ||
1540 | ### | |
1541 | # External module support. | |
1542 | # When building external modules the kernel used as basis is considered | |
1543 | # read-only, and no consistency checks are made and the make | |
1544 | # system is not used on the basis kernel. If updates are required | |
1545 | # in the basis kernel ordinary make commands (without M=...) must | |
1546 | # be used. | |
1547 | # | |
1548 | # The following are the only valid targets when building external | |
1549 | # modules. | |
1550 | # make M=dir clean Delete all automatically generated files | |
1551 | # make M=dir modules Make all modules in specified dir | |
1552 | # make M=dir Same as 'make M=dir modules' | |
1553 | # make M=dir modules_install | |
1554 | # Install the modules built in the module directory | |
1555 | # Assumes install directory is already created | |
1556 | ||
1557 | # We are always building modules | |
1558 | KBUILD_MODULES := 1 | |
1559 | ||
1560 | PHONY += $(objtree)/Module.symvers | |
1561 | $(objtree)/Module.symvers: | |
1562 | @test -e $(objtree)/Module.symvers || ( \ | |
1563 | echo; \ | |
1564 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1565 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1566 | echo ) | |
1567 | ||
1568 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
1569 | PHONY += $(module-dirs) modules | |
1570 | $(module-dirs): prepare $(objtree)/Module.symvers | |
1571 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1572 | ||
1573 | modules: $(module-dirs) | |
1574 | @$(kecho) ' Building modules, stage 2.'; | |
1575 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1576 | ||
1577 | PHONY += modules_install | |
1578 | modules_install: _emodinst_ _emodinst_post | |
1579 | ||
1580 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | |
1581 | PHONY += _emodinst_ | |
1582 | _emodinst_: | |
1583 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | |
1584 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1585 | ||
1586 | PHONY += _emodinst_post | |
1587 | _emodinst_post: _emodinst_ | |
1588 | $(call cmd,depmod) | |
1589 | ||
1590 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | |
1591 | ||
1592 | PHONY += $(clean-dirs) clean | |
1593 | $(clean-dirs): | |
1594 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1595 | ||
1596 | clean: rm-dirs := $(MODVERDIR) | |
1597 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers | |
1598 | ||
1599 | PHONY += help | |
1600 | help: | |
1601 | @echo ' Building external modules.' | |
1602 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1603 | @echo '' | |
1604 | @echo ' modules - default target, build the module(s)' | |
1605 | @echo ' modules_install - install the module' | |
1606 | @echo ' clean - remove generated files in module directory only' | |
1607 | @echo '' | |
1608 | ||
1609 | PHONY += prepare | |
1610 | prepare: | |
1611 | $(cmd_crmodverdir) | |
1612 | endif # KBUILD_EXTMOD | |
1613 | ||
1614 | clean: $(clean-dirs) | |
1615 | $(call cmd,rmdirs) | |
1616 | $(call cmd,rmfiles) | |
1617 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1618 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1619 | -o -name '*.ko.*' \ | |
1620 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
1621 | -o -name '*.dwo' -o -name '*.lst' \ | |
1622 | -o -name '*.su' \ | |
1623 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1624 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ | |
1625 | -o -name '*.asn1.[ch]' \ | |
1626 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1627 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
1628 | -o -name '*.c.[012]*.*' \ | |
1629 | -o -name '*.ll' \ | |
1630 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1631 | ||
1632 | # Generate tags for editors | |
1633 | # --------------------------------------------------------------------------- | |
1634 | quiet_cmd_tags = GEN $@ | |
1635 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1636 | ||
1637 | tags TAGS cscope gtags: FORCE | |
1638 | $(call cmd,tags) | |
1639 | ||
1640 | # Scripts to check various things for consistency | |
1641 | # --------------------------------------------------------------------------- | |
1642 | ||
1643 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report | |
1644 | ||
1645 | includecheck: | |
1646 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1647 | -name '*.[hcS]' -type f -print | sort \ | |
1648 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1649 | ||
1650 | versioncheck: | |
1651 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1652 | -name '*.[hcS]' -type f -print | sort \ | |
1653 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
1654 | ||
1655 | coccicheck: | |
1656 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1657 | ||
1658 | namespacecheck: | |
1659 | $(PERL) $(srctree)/scripts/namespace.pl | |
1660 | ||
1661 | export_report: | |
1662 | $(PERL) $(srctree)/scripts/export_report.pl | |
1663 | ||
1664 | PHONY += checkstack kernelrelease kernelversion image_name | |
1665 | ||
1666 | # UML needs a little special treatment here. It wants to use the host | |
1667 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1668 | # else wants $(ARCH), including people doing cross-builds, which means | |
1669 | # that $(SUBARCH) doesn't work here. | |
1670 | ifeq ($(ARCH), um) | |
1671 | CHECKSTACK_ARCH := $(SUBARCH) | |
1672 | else | |
1673 | CHECKSTACK_ARCH := $(ARCH) | |
1674 | endif | |
1675 | checkstack: | |
1676 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1677 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
1678 | ||
1679 | kernelrelease: | |
1680 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1681 | ||
1682 | kernelversion: | |
1683 | @echo $(KERNELVERSION) | |
1684 | ||
1685 | image_name: | |
1686 | @echo $(KBUILD_IMAGE) | |
1687 | ||
1688 | # Clear a bunch of variables before executing the submake | |
1689 | ||
1690 | ifeq ($(quiet),silent_) | |
1691 | tools_silent=s | |
1692 | endif | |
1693 | ||
1694 | tools/: FORCE | |
1695 | $(Q)mkdir -p $(objtree)/tools | |
1696 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ | |
1697 | ||
1698 | tools/%: FORCE | |
1699 | $(Q)mkdir -p $(objtree)/tools | |
1700 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* | |
1701 | ||
1702 | # Single targets | |
1703 | # --------------------------------------------------------------------------- | |
1704 | # Single targets are compatible with: | |
1705 | # - build with mixed source and output | |
1706 | # - build with separate output dir 'make O=...' | |
1707 | # - external modules | |
1708 | # | |
1709 | # target-dir => where to store outputfile | |
1710 | # build-dir => directory in kernel source tree to use | |
1711 | ||
1712 | build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ | |
1713 | build-dir = $(patsubst %/,%,$(dir $(build-target))) | |
1714 | ||
1715 | %.i: prepare FORCE | |
1716 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1717 | %.ll: prepare FORCE | |
1718 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1719 | %.lst: prepare FORCE | |
1720 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1721 | %.o: prepare FORCE | |
1722 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1723 | %.s: prepare FORCE | |
1724 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1725 | %.symtypes: prepare FORCE | |
1726 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1727 | %.ko: %.o | |
1728 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1729 | ||
1730 | # Modules | |
1731 | PHONY += / | |
1732 | /: ./ | |
1733 | ||
1734 | # Make sure the latest headers are built for Documentation | |
1735 | Documentation/ samples/: headers_install | |
1736 | %/: prepare FORCE | |
1737 | $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) | |
1738 | ||
1739 | # FIXME Should go into a make.lib or something | |
1740 | # =========================================================================== | |
1741 | ||
1742 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1743 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1744 | ||
1745 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1746 | cmd_rmfiles = rm -f $(rm-files) | |
1747 | ||
1748 | # Run depmod only if we have System.map and depmod is executable | |
1749 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1750 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ | |
1751 | $(KERNELRELEASE) | |
1752 | ||
1753 | # Create temporary dir for module support files | |
1754 | # clean it up only when building all modules | |
1755 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1756 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1757 | ||
1758 | # read saved command lines for existing targets | |
1759 | existing-targets := $(wildcard $(sort $(targets))) | |
1760 | ||
1761 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
1762 | ||
1763 | endif # ifeq ($(config-targets),1) | |
1764 | endif # ifeq ($(mixed-targets),1) | |
1765 | endif # need-sub-make | |
1766 | ||
1767 | PHONY += FORCE | |
1768 | FORCE: | |
1769 | ||
1770 | # Declare the contents of the PHONY variable as phony. We keep that | |
1771 | # information in a variable so we can use it in if_changed and friends. | |
1772 | .PHONY: $(PHONY) |