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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | VERSION = 5 | |
3 | PATCHLEVEL = 2 | |
4 | SUBLEVEL = 0 | |
5 | EXTRAVERSION = -rc6 | |
6 | NAME = Golden Lions | |
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 Please use 'M=' or 'KBUILD_EXTMOD' instead) | |
216 | $(warning ==========================================) | |
217 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
218 | endif | |
219 | ||
220 | ifeq ("$(origin M)", "command line") | |
221 | KBUILD_EXTMOD := $(M) | |
222 | endif | |
223 | ||
224 | ifeq ($(abs_srctree),$(abs_objtree)) | |
225 | # building in the source tree | |
226 | srctree := . | |
227 | else | |
228 | ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) | |
229 | # building in a subdirectory of the source tree | |
230 | srctree := .. | |
231 | else | |
232 | srctree := $(abs_srctree) | |
233 | endif | |
234 | ||
235 | # TODO: | |
236 | # KBUILD_SRC is only used to distinguish in-tree/out-of-tree build. | |
237 | # Replace it with $(srctree) or something. | |
238 | KBUILD_SRC := $(abs_srctree) | |
239 | endif | |
240 | ||
241 | export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC | |
242 | ||
243 | objtree := . | |
244 | src := $(srctree) | |
245 | obj := $(objtree) | |
246 | ||
247 | VPATH := $(srctree) | |
248 | ||
249 | export srctree objtree VPATH | |
250 | ||
251 | # To make sure we do not include .config for any of the *config targets | |
252 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
253 | # It is allowed to specify more targets when calling make, including | |
254 | # mixing *config targets and build targets. | |
255 | # For example 'make oldconfig all'. | |
256 | # Detect when mixed targets is specified, and make a second invocation | |
257 | # of make so .config is not included in this case either (for *config). | |
258 | ||
259 | version_h := include/generated/uapi/linux/version.h | |
260 | old_version_h := include/linux/version.h | |
261 | ||
262 | clean-targets := %clean mrproper cleandocs | |
263 | no-dot-config-targets := $(clean-targets) \ | |
264 | cscope gtags TAGS tags help% %docs check% coccicheck \ | |
265 | $(version_h) headers_% archheaders archscripts \ | |
266 | %asm-generic kernelversion %src-pkg | |
267 | no-sync-config-targets := $(no-dot-config-targets) install %install \ | |
268 | kernelrelease | |
269 | ||
270 | config-targets := 0 | |
271 | mixed-targets := 0 | |
272 | dot-config := 1 | |
273 | may-sync-config := 1 | |
274 | ||
275 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
276 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
277 | dot-config := 0 | |
278 | endif | |
279 | endif | |
280 | ||
281 | ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
282 | ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) | |
283 | may-sync-config := 0 | |
284 | endif | |
285 | endif | |
286 | ||
287 | ifneq ($(KBUILD_EXTMOD),) | |
288 | may-sync-config := 0 | |
289 | endif | |
290 | ||
291 | ifeq ($(KBUILD_EXTMOD),) | |
292 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
293 | config-targets := 1 | |
294 | ifneq ($(words $(MAKECMDGOALS)),1) | |
295 | mixed-targets := 1 | |
296 | endif | |
297 | endif | |
298 | endif | |
299 | ||
300 | # For "make -j clean all", "make -j mrproper defconfig all", etc. | |
301 | ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) | |
302 | ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) | |
303 | mixed-targets := 1 | |
304 | endif | |
305 | endif | |
306 | ||
307 | # install and modules_install need also be processed one by one | |
308 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
309 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
310 | mixed-targets := 1 | |
311 | endif | |
312 | endif | |
313 | ||
314 | ifeq ($(mixed-targets),1) | |
315 | # =========================================================================== | |
316 | # We're called with mixed targets (*config and build targets). | |
317 | # Handle them one by one. | |
318 | ||
319 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
320 | ||
321 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
322 | @: | |
323 | ||
324 | __build_one_by_one: | |
325 | $(Q)set -e; \ | |
326 | for i in $(MAKECMDGOALS); do \ | |
327 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
328 | done | |
329 | ||
330 | else | |
331 | ||
332 | include scripts/Kbuild.include | |
333 | ||
334 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
335 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
336 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
337 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
338 | ||
339 | include scripts/subarch.include | |
340 | ||
341 | # Cross compiling and selecting different set of gcc/bin-utils | |
342 | # --------------------------------------------------------------------------- | |
343 | # | |
344 | # When performing cross compilation for other architectures ARCH shall be set | |
345 | # to the target architecture. (See arch/* for the possibilities). | |
346 | # ARCH can be set during invocation of make: | |
347 | # make ARCH=ia64 | |
348 | # Another way is to have ARCH set in the environment. | |
349 | # The default ARCH is the host where make is executed. | |
350 | ||
351 | # CROSS_COMPILE specify the prefix used for all executables used | |
352 | # during compilation. Only gcc and related bin-utils executables | |
353 | # are prefixed with $(CROSS_COMPILE). | |
354 | # CROSS_COMPILE can be set on the command line | |
355 | # make CROSS_COMPILE=ia64-linux- | |
356 | # Alternatively CROSS_COMPILE can be set in the environment. | |
357 | # Default value for CROSS_COMPILE is not to prefix executables | |
358 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
359 | ARCH ?= $(SUBARCH) | |
360 | ||
361 | # Architecture as present in compile.h | |
362 | UTS_MACHINE := $(ARCH) | |
363 | SRCARCH := $(ARCH) | |
364 | ||
365 | # Additional ARCH settings for x86 | |
366 | ifeq ($(ARCH),i386) | |
367 | SRCARCH := x86 | |
368 | endif | |
369 | ifeq ($(ARCH),x86_64) | |
370 | SRCARCH := x86 | |
371 | endif | |
372 | ||
373 | # Additional ARCH settings for sparc | |
374 | ifeq ($(ARCH),sparc32) | |
375 | SRCARCH := sparc | |
376 | endif | |
377 | ifeq ($(ARCH),sparc64) | |
378 | SRCARCH := sparc | |
379 | endif | |
380 | ||
381 | # Additional ARCH settings for sh | |
382 | ifeq ($(ARCH),sh64) | |
383 | SRCARCH := sh | |
384 | endif | |
385 | ||
386 | KCONFIG_CONFIG ?= .config | |
387 | export KCONFIG_CONFIG | |
388 | ||
389 | # SHELL used by kbuild | |
390 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
391 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
392 | else echo sh; fi ; fi) | |
393 | ||
394 | HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) | |
395 | HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) | |
396 | HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) | |
397 | ||
398 | HOSTCC = gcc | |
399 | HOSTCXX = g++ | |
400 | KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ | |
401 | -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ | |
402 | $(HOSTCFLAGS) | |
403 | KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) | |
404 | KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) | |
405 | KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) | |
406 | ||
407 | # Make variables (CC, etc...) | |
408 | AS = $(CROSS_COMPILE)as | |
409 | LD = $(CROSS_COMPILE)ld | |
410 | CC = $(CROSS_COMPILE)gcc | |
411 | CPP = $(CC) -E | |
412 | AR = $(CROSS_COMPILE)ar | |
413 | NM = $(CROSS_COMPILE)nm | |
414 | STRIP = $(CROSS_COMPILE)strip | |
415 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
416 | OBJDUMP = $(CROSS_COMPILE)objdump | |
417 | PAHOLE = pahole | |
418 | LEX = flex | |
419 | YACC = bison | |
420 | AWK = awk | |
421 | INSTALLKERNEL := installkernel | |
422 | DEPMOD = /sbin/depmod | |
423 | PERL = perl | |
424 | PYTHON = python | |
425 | PYTHON2 = python2 | |
426 | PYTHON3 = python3 | |
427 | CHECK = sparse | |
428 | ||
429 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
430 | -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) | |
431 | NOSTDINC_FLAGS := | |
432 | CFLAGS_MODULE = | |
433 | AFLAGS_MODULE = | |
434 | LDFLAGS_MODULE = | |
435 | CFLAGS_KERNEL = | |
436 | AFLAGS_KERNEL = | |
437 | LDFLAGS_vmlinux = | |
438 | ||
439 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
440 | USERINCLUDE := \ | |
441 | -I$(srctree)/arch/$(SRCARCH)/include/uapi \ | |
442 | -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ | |
443 | -I$(srctree)/include/uapi \ | |
444 | -I$(objtree)/include/generated/uapi \ | |
445 | -include $(srctree)/include/linux/kconfig.h | |
446 | ||
447 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
448 | # Needed to be compatible with the O= option | |
449 | LINUXINCLUDE := \ | |
450 | -I$(srctree)/arch/$(SRCARCH)/include \ | |
451 | -I$(objtree)/arch/$(SRCARCH)/include/generated \ | |
452 | $(if $(filter .,$(srctree)),,-I$(srctree)/include) \ | |
453 | -I$(objtree)/include \ | |
454 | $(USERINCLUDE) | |
455 | ||
456 | KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE | |
457 | KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ | |
458 | -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ | |
459 | -Werror=implicit-function-declaration -Werror=implicit-int \ | |
460 | -Wno-format-security \ | |
461 | -std=gnu89 | |
462 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
463 | KBUILD_AFLAGS_KERNEL := | |
464 | KBUILD_CFLAGS_KERNEL := | |
465 | KBUILD_AFLAGS_MODULE := -DMODULE | |
466 | KBUILD_CFLAGS_MODULE := -DMODULE | |
467 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
468 | KBUILD_LDFLAGS := | |
469 | GCC_PLUGINS_CFLAGS := | |
470 | ||
471 | export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC | |
472 | export CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS | |
473 | export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE | |
474 | export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
475 | ||
476 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS | |
477 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | |
478 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN | |
479 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
480 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
481 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL | |
482 | export KBUILD_ARFLAGS | |
483 | ||
484 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
485 | # tree rather than in the kernel tree. The kernel tree might | |
486 | # even be read-only. | |
487 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
488 | ||
489 | # Files to ignore in find ... statements | |
490 | ||
491 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ | |
492 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
493 | -prune -o | |
494 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ | |
495 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
496 | ||
497 | # =========================================================================== | |
498 | # Rules shared between *config targets and build targets | |
499 | ||
500 | # Basic helpers built in scripts/basic/ | |
501 | PHONY += scripts_basic | |
502 | scripts_basic: | |
503 | $(Q)$(MAKE) $(build)=scripts/basic | |
504 | $(Q)rm -f .tmp_quiet_recordmcount | |
505 | ||
506 | PHONY += outputmakefile | |
507 | # outputmakefile generates a Makefile in the output directory, if using a | |
508 | # separate output directory. This allows convenient use of make in the | |
509 | # output directory. | |
510 | # At the same time when output Makefile generated, generate .gitignore to | |
511 | # ignore whole output directory | |
512 | outputmakefile: | |
513 | ifneq ($(srctree),.) | |
514 | $(Q)ln -fsn $(srctree) source | |
515 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) | |
516 | $(Q)test -e .gitignore || \ | |
517 | { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore | |
518 | endif | |
519 | ||
520 | ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) | |
521 | ifneq ($(CROSS_COMPILE),) | |
522 | CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) | |
523 | GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) | |
524 | CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) | |
525 | GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) | |
526 | endif | |
527 | ifneq ($(GCC_TOOLCHAIN),) | |
528 | CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) | |
529 | endif | |
530 | CLANG_FLAGS += -no-integrated-as | |
531 | KBUILD_CFLAGS += $(CLANG_FLAGS) | |
532 | KBUILD_AFLAGS += $(CLANG_FLAGS) | |
533 | export CLANG_FLAGS | |
534 | endif | |
535 | ||
536 | # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. | |
537 | # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. | |
538 | # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), | |
539 | # and from include/config/auto.conf.cmd to detect the compiler upgrade. | |
540 | CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) | |
541 | ||
542 | ifeq ($(config-targets),1) | |
543 | # =========================================================================== | |
544 | # *config targets only - make sure prerequisites are updated, and descend | |
545 | # in scripts/kconfig to make the *config target | |
546 | ||
547 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
548 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
549 | # used for 'make defconfig' | |
550 | include arch/$(SRCARCH)/Makefile | |
551 | export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT | |
552 | ||
553 | config: scripts_basic outputmakefile FORCE | |
554 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
555 | ||
556 | %config: scripts_basic outputmakefile FORCE | |
557 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
558 | ||
559 | else | |
560 | # =========================================================================== | |
561 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
562 | # targets and others. In general all targets except *config targets. | |
563 | ||
564 | # If building an external module we do not care about the all: rule | |
565 | # but instead _all depend on modules | |
566 | PHONY += all | |
567 | ifeq ($(KBUILD_EXTMOD),) | |
568 | _all: all | |
569 | else | |
570 | _all: modules | |
571 | endif | |
572 | ||
573 | # Decide whether to build built-in, modular, or both. | |
574 | # Normally, just do built-in. | |
575 | ||
576 | KBUILD_MODULES := | |
577 | KBUILD_BUILTIN := 1 | |
578 | ||
579 | # If we have only "make modules", don't compile built-in objects. | |
580 | # When we're building modules with modversions, we need to consider | |
581 | # the built-in objects during the descend as well, in order to | |
582 | # make sure the checksums are up to date before we record them. | |
583 | ||
584 | ifeq ($(MAKECMDGOALS),modules) | |
585 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
586 | endif | |
587 | ||
588 | # If we have "make <whatever> modules", compile modules | |
589 | # in addition to whatever we do anyway. | |
590 | # Just "make" or "make all" shall build modules as well | |
591 | ||
592 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
593 | KBUILD_MODULES := 1 | |
594 | endif | |
595 | ||
596 | ifeq ($(MAKECMDGOALS),) | |
597 | KBUILD_MODULES := 1 | |
598 | endif | |
599 | ||
600 | export KBUILD_MODULES KBUILD_BUILTIN | |
601 | ||
602 | ifeq ($(dot-config),1) | |
603 | include include/config/auto.conf | |
604 | endif | |
605 | ||
606 | ifeq ($(KBUILD_EXTMOD),) | |
607 | # Objects we will link into vmlinux / subdirs we need to visit | |
608 | init-y := init/ | |
609 | drivers-y := drivers/ sound/ | |
610 | drivers-$(CONFIG_SAMPLES) += samples/ | |
611 | net-y := net/ | |
612 | libs-y := lib/ | |
613 | core-y := usr/ | |
614 | virt-y := virt/ | |
615 | endif # KBUILD_EXTMOD | |
616 | ||
617 | # The all: target is the default when no target is given on the | |
618 | # command line. | |
619 | # This allow a user to issue only 'make' to build a kernel including modules | |
620 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
621 | all: vmlinux | |
622 | ||
623 | CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ | |
624 | $(call cc-option,-fno-tree-loop-im) \ | |
625 | $(call cc-disable-warning,maybe-uninitialized,) | |
626 | export CFLAGS_GCOV | |
627 | ||
628 | # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. | |
629 | ifdef CONFIG_FUNCTION_TRACER | |
630 | CC_FLAGS_FTRACE := -pg | |
631 | endif | |
632 | ||
633 | RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register | |
634 | RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register | |
635 | RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk | |
636 | RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline | |
637 | RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) | |
638 | RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) | |
639 | export RETPOLINE_CFLAGS | |
640 | export RETPOLINE_VDSO_CFLAGS | |
641 | ||
642 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default | |
643 | # values of the respective KBUILD_* variables | |
644 | ARCH_CPPFLAGS := | |
645 | ARCH_AFLAGS := | |
646 | ARCH_CFLAGS := | |
647 | include arch/$(SRCARCH)/Makefile | |
648 | ||
649 | ifeq ($(dot-config),1) | |
650 | ifeq ($(may-sync-config),1) | |
651 | # Read in dependencies to all Kconfig* files, make sure to run syncconfig if | |
652 | # changes are detected. This should be included after arch/$(SRCARCH)/Makefile | |
653 | # because some architectures define CROSS_COMPILE there. | |
654 | include include/config/auto.conf.cmd | |
655 | ||
656 | $(KCONFIG_CONFIG): | |
657 | @echo >&2 '***' | |
658 | @echo >&2 '*** Configuration file "$@" not found!' | |
659 | @echo >&2 '***' | |
660 | @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' | |
661 | @echo >&2 '*** "make menuconfig" or "make xconfig").' | |
662 | @echo >&2 '***' | |
663 | @/bin/false | |
664 | ||
665 | # The actual configuration files used during the build are stored in | |
666 | # include/generated/ and include/config/. Update them if .config is newer than | |
667 | # include/config/auto.conf (which mirrors .config). | |
668 | # | |
669 | # This exploits the 'multi-target pattern rule' trick. | |
670 | # The syncconfig should be executed only once to make all the targets. | |
671 | %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) | |
672 | $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig | |
673 | else | |
674 | # External modules and some install targets need include/generated/autoconf.h | |
675 | # and include/config/auto.conf but do not care if they are up-to-date. | |
676 | # Use auto.conf to trigger the test | |
677 | PHONY += include/config/auto.conf | |
678 | ||
679 | include/config/auto.conf: | |
680 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ | |
681 | echo >&2; \ | |
682 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
683 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
684 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
685 | echo >&2 ; \ | |
686 | /bin/false) | |
687 | ||
688 | endif # may-sync-config | |
689 | endif # $(dot-config) | |
690 | ||
691 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) | |
692 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) | |
693 | KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) | |
694 | KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) | |
695 | KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) | |
696 | ||
697 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
698 | KBUILD_CFLAGS += -Os | |
699 | else | |
700 | KBUILD_CFLAGS += -O2 | |
701 | endif | |
702 | ||
703 | ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED | |
704 | KBUILD_CFLAGS += -Wno-maybe-uninitialized | |
705 | endif | |
706 | ||
707 | # Tell gcc to never replace conditional load with a non-conditional one | |
708 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
709 | ||
710 | include scripts/Makefile.kcov | |
711 | include scripts/Makefile.gcc-plugins | |
712 | ||
713 | ifdef CONFIG_READABLE_ASM | |
714 | # Disable optimizations that make assembler listings hard to read. | |
715 | # reorder blocks reorders the control in the function | |
716 | # ipa clone creates specialized cloned functions | |
717 | # partial inlining inlines only parts of functions | |
718 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
719 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
720 | $(call cc-option,-fno-partial-inlining) | |
721 | endif | |
722 | ||
723 | ifneq ($(CONFIG_FRAME_WARN),0) | |
724 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) | |
725 | endif | |
726 | ||
727 | stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector | |
728 | stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector | |
729 | stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong | |
730 | ||
731 | KBUILD_CFLAGS += $(stackp-flags-y) | |
732 | ||
733 | ifdef CONFIG_CC_IS_CLANG | |
734 | KBUILD_CPPFLAGS += -Qunused-arguments | |
735 | KBUILD_CFLAGS += -Wno-format-invalid-specifier | |
736 | KBUILD_CFLAGS += -Wno-gnu | |
737 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
738 | KBUILD_CFLAGS += -Wno-tautological-compare | |
739 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
740 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
741 | # See modpost pattern 2 | |
742 | KBUILD_CFLAGS += -mno-global-merge | |
743 | else | |
744 | ||
745 | # These warnings generated too much noise in a regular build. | |
746 | # Use make W=1 to enable them (see scripts/Makefile.extrawarn) | |
747 | KBUILD_CFLAGS += -Wno-unused-but-set-variable | |
748 | endif | |
749 | ||
750 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) | |
751 | ifdef CONFIG_FRAME_POINTER | |
752 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
753 | else | |
754 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
755 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
756 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
757 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
758 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
759 | ifndef CONFIG_FUNCTION_TRACER | |
760 | KBUILD_CFLAGS += -fomit-frame-pointer | |
761 | endif | |
762 | endif | |
763 | ||
764 | # Initialize all stack variables with a pattern, if desired. | |
765 | ifdef CONFIG_INIT_STACK_ALL | |
766 | KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern | |
767 | endif | |
768 | ||
769 | DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) | |
770 | ||
771 | ifdef CONFIG_DEBUG_INFO | |
772 | ifdef CONFIG_DEBUG_INFO_SPLIT | |
773 | DEBUG_CFLAGS += -gsplit-dwarf | |
774 | else | |
775 | DEBUG_CFLAGS += -g | |
776 | endif | |
777 | KBUILD_AFLAGS += -Wa,-gdwarf-2 | |
778 | endif | |
779 | ifdef CONFIG_DEBUG_INFO_DWARF4 | |
780 | DEBUG_CFLAGS += -gdwarf-4 | |
781 | endif | |
782 | ||
783 | ifdef CONFIG_DEBUG_INFO_REDUCED | |
784 | DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ | |
785 | $(call cc-option,-fno-var-tracking) | |
786 | endif | |
787 | ||
788 | KBUILD_CFLAGS += $(DEBUG_CFLAGS) | |
789 | export DEBUG_CFLAGS | |
790 | ||
791 | ifdef CONFIG_FUNCTION_TRACER | |
792 | ifdef CONFIG_FTRACE_MCOUNT_RECORD | |
793 | # gcc 5 supports generating the mcount tables directly | |
794 | ifeq ($(call cc-option-yn,-mrecord-mcount),y) | |
795 | CC_FLAGS_FTRACE += -mrecord-mcount | |
796 | export CC_USING_RECORD_MCOUNT := 1 | |
797 | endif | |
798 | ifdef CONFIG_HAVE_NOP_MCOUNT | |
799 | ifeq ($(call cc-option-yn, -mnop-mcount),y) | |
800 | CC_FLAGS_FTRACE += -mnop-mcount | |
801 | CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT | |
802 | endif | |
803 | endif | |
804 | endif | |
805 | ifdef CONFIG_HAVE_FENTRY | |
806 | ifeq ($(call cc-option-yn, -mfentry),y) | |
807 | CC_FLAGS_FTRACE += -mfentry | |
808 | CC_FLAGS_USING += -DCC_USING_FENTRY | |
809 | endif | |
810 | endif | |
811 | export CC_FLAGS_FTRACE | |
812 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) | |
813 | KBUILD_AFLAGS += $(CC_FLAGS_USING) | |
814 | ifdef CONFIG_DYNAMIC_FTRACE | |
815 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
816 | BUILD_C_RECORDMCOUNT := y | |
817 | export BUILD_C_RECORDMCOUNT | |
818 | endif | |
819 | endif | |
820 | endif | |
821 | ||
822 | # We trigger additional mismatches with less inlining | |
823 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
824 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
825 | endif | |
826 | ||
827 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
828 | KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections | |
829 | LDFLAGS_vmlinux += --gc-sections | |
830 | endif | |
831 | ||
832 | ifdef CONFIG_LIVEPATCH | |
833 | KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) | |
834 | endif | |
835 | ||
836 | # arch Makefile may override CC so keep this after arch Makefile is included | |
837 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | |
838 | ||
839 | # warn about C99 declaration after statement | |
840 | KBUILD_CFLAGS += -Wdeclaration-after-statement | |
841 | ||
842 | # Variable Length Arrays (VLAs) should not be used anywhere in the kernel | |
843 | KBUILD_CFLAGS += -Wvla | |
844 | ||
845 | # disable pointer signed / unsigned warnings in gcc 4.0 | |
846 | KBUILD_CFLAGS += -Wno-pointer-sign | |
847 | ||
848 | # disable stringop warnings in gcc 8+ | |
849 | KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) | |
850 | ||
851 | # disable invalid "can't wrap" optimizations for signed / pointers | |
852 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) | |
853 | ||
854 | # clang sets -fmerge-all-constants by default as optimization, but this | |
855 | # is non-conforming behavior for C and in fact breaks the kernel, so we | |
856 | # need to disable it here generally. | |
857 | KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) | |
858 | ||
859 | # for gcc -fno-merge-all-constants disables everything, but it is fine | |
860 | # to have actual conforming behavior enabled. | |
861 | KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) | |
862 | ||
863 | # Make sure -fstack-check isn't enabled (like gentoo apparently did) | |
864 | KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) | |
865 | ||
866 | # conserve stack if available | |
867 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
868 | ||
869 | # Prohibit date/time macros, which would make the build non-deterministic | |
870 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
871 | ||
872 | # enforce correct pointer usage | |
873 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
874 | ||
875 | # Require designated initializers for all marked structures | |
876 | KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) | |
877 | ||
878 | # change __FILE__ to the relative path from the srctree | |
879 | KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) | |
880 | ||
881 | # use the deterministic mode of AR if available | |
882 | KBUILD_ARFLAGS := $(call ar-option,D) | |
883 | ||
884 | include scripts/Makefile.kasan | |
885 | include scripts/Makefile.extrawarn | |
886 | include scripts/Makefile.ubsan | |
887 | ||
888 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the | |
889 | # last assignments | |
890 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
891 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
892 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
893 | ||
894 | # Use --build-id when available. | |
895 | LDFLAGS_BUILD_ID := $(call ld-option, --build-id) | |
896 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) | |
897 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) | |
898 | ||
899 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
900 | LDFLAGS_vmlinux += $(call ld-option, -X,) | |
901 | endif | |
902 | ||
903 | # insure the checker run with the right endianness | |
904 | CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) | |
905 | ||
906 | # the checker needs the correct machine size | |
907 | CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) | |
908 | ||
909 | # Default kernel image to build when no specific target is given. | |
910 | # KBUILD_IMAGE may be overruled on the command line or | |
911 | # set in the environment | |
912 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
913 | # this default value | |
914 | export KBUILD_IMAGE ?= vmlinux | |
915 | ||
916 | # | |
917 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
918 | # images. Default is /boot, but you can set it to other values | |
919 | export INSTALL_PATH ?= /boot | |
920 | ||
921 | # | |
922 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
923 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
924 | # an argument if needed. Otherwise it defaults to the kernel install path | |
925 | # | |
926 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
927 | ||
928 | # | |
929 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
930 | # relocations required by build roots. This is not defined in the | |
931 | # makefile but the argument can be passed to make if needed. | |
932 | # | |
933 | ||
934 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
935 | export MODLIB | |
936 | ||
937 | # | |
938 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
939 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
940 | # the default option --strip-debug will be used. Otherwise, | |
941 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
942 | ||
943 | ifdef INSTALL_MOD_STRIP | |
944 | ifeq ($(INSTALL_MOD_STRIP),1) | |
945 | mod_strip_cmd = $(STRIP) --strip-debug | |
946 | else | |
947 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
948 | endif # INSTALL_MOD_STRIP=1 | |
949 | else | |
950 | mod_strip_cmd = true | |
951 | endif # INSTALL_MOD_STRIP | |
952 | export mod_strip_cmd | |
953 | ||
954 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed | |
955 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
956 | # or CONFIG_MODULE_COMPRESS_XZ. | |
957 | ||
958 | mod_compress_cmd = true | |
959 | ifdef CONFIG_MODULE_COMPRESS | |
960 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
961 | mod_compress_cmd = gzip -n -f | |
962 | endif # CONFIG_MODULE_COMPRESS_GZIP | |
963 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
964 | mod_compress_cmd = xz -f | |
965 | endif # CONFIG_MODULE_COMPRESS_XZ | |
966 | endif # CONFIG_MODULE_COMPRESS | |
967 | export mod_compress_cmd | |
968 | ||
969 | ifdef CONFIG_MODULE_SIG_ALL | |
970 | $(eval $(call config_filename,MODULE_SIG_KEY)) | |
971 | ||
972 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
973 | else | |
974 | mod_sign_cmd = true | |
975 | endif | |
976 | export mod_sign_cmd | |
977 | ||
978 | HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) | |
979 | ||
980 | ifdef CONFIG_STACK_VALIDATION | |
981 | has_libelf := $(call try-run,\ | |
982 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) | |
983 | ifeq ($(has_libelf),1) | |
984 | objtool_target := tools/objtool FORCE | |
985 | else | |
986 | SKIP_STACK_VALIDATION := 1 | |
987 | export SKIP_STACK_VALIDATION | |
988 | endif | |
989 | endif | |
990 | ||
991 | PHONY += prepare0 | |
992 | ||
993 | ifeq ($(KBUILD_EXTMOD),) | |
994 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ | |
995 | ||
996 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
997 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
998 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) | |
999 | ||
1000 | vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ | |
1001 | $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ | |
1002 | $(drivers-) $(net-) $(libs-) $(virt-)))) | |
1003 | ||
1004 | init-y := $(patsubst %/, %/built-in.a, $(init-y)) | |
1005 | core-y := $(patsubst %/, %/built-in.a, $(core-y)) | |
1006 | drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) | |
1007 | net-y := $(patsubst %/, %/built-in.a, $(net-y)) | |
1008 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
1009 | libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) | |
1010 | virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) | |
1011 | ||
1012 | # Externally visible symbols (used by link-vmlinux.sh) | |
1013 | export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ | |
1014 | $(drivers-y) $(net-y) $(virt-y) | |
1015 | export KBUILD_VMLINUX_LIBS := $(libs-y1) | |
1016 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
1017 | export LDFLAGS_vmlinux | |
1018 | # used by scripts/package/Makefile | |
1019 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) | |
1020 | ||
1021 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) | |
1022 | ||
1023 | # Recurse until adjust_autoksyms.sh is satisfied | |
1024 | PHONY += autoksyms_recursive | |
1025 | autoksyms_recursive: $(vmlinux-deps) | |
1026 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1027 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ | |
1028 | "$(MAKE) -f $(srctree)/Makefile vmlinux" | |
1029 | endif | |
1030 | ||
1031 | # For the kernel to actually contain only the needed exported symbols, | |
1032 | # we have to build modules as well to determine what those symbols are. | |
1033 | # (this can be evaluated only once include/config/auto.conf has been included) | |
1034 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1035 | KBUILD_MODULES := 1 | |
1036 | endif | |
1037 | ||
1038 | autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) | |
1039 | ||
1040 | $(autoksyms_h): | |
1041 | $(Q)mkdir -p $(dir $@) | |
1042 | $(Q)touch $@ | |
1043 | ||
1044 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) | |
1045 | ||
1046 | # Final link of vmlinux with optional arch pass after final link | |
1047 | cmd_link-vmlinux = \ | |
1048 | $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ | |
1049 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) | |
1050 | ||
1051 | vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE | |
1052 | +$(call if_changed,link-vmlinux) | |
1053 | ||
1054 | targets := vmlinux | |
1055 | ||
1056 | # Some samples need headers_install. | |
1057 | samples: headers_install | |
1058 | ||
1059 | # The actual objects are generated when descending, | |
1060 | # make sure no implicit rule kicks in | |
1061 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; | |
1062 | ||
1063 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
1064 | # Preset locale variables to speed up the build process. Limit locale | |
1065 | # tweaks to this spot to avoid wrong language settings when running | |
1066 | # make menuconfig etc. | |
1067 | # Error messages still appears in the original language | |
1068 | ||
1069 | PHONY += $(vmlinux-dirs) | |
1070 | $(vmlinux-dirs): prepare | |
1071 | $(Q)$(MAKE) $(build)=$@ need-builtin=1 | |
1072 | ||
1073 | filechk_kernel.release = \ | |
1074 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1075 | ||
1076 | # Store (new) KERNELRELEASE string in include/config/kernel.release | |
1077 | include/config/kernel.release: FORCE | |
1078 | $(call filechk,kernel.release) | |
1079 | ||
1080 | # Additional helpers built in scripts/ | |
1081 | # Carefully list dependencies so we do not try to build scripts twice | |
1082 | # in parallel | |
1083 | PHONY += scripts | |
1084 | scripts: scripts_basic scripts_dtc | |
1085 | $(Q)$(MAKE) $(build)=$(@) | |
1086 | ||
1087 | # Things we need to do before we recursively start building the kernel | |
1088 | # or the modules are listed in "prepare". | |
1089 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
1090 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
1091 | # version.h and scripts_basic is processed / created. | |
1092 | ||
1093 | PHONY += prepare archprepare prepare1 prepare3 | |
1094 | ||
1095 | # prepare3 is used to check if we are building in a separate output directory, | |
1096 | # and if so do: | |
1097 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
1098 | prepare3: include/config/kernel.release | |
1099 | ifneq ($(srctree),.) | |
1100 | @$(kecho) ' Using $(srctree) as source for kernel' | |
1101 | $(Q)if [ -f $(srctree)/.config -o \ | |
1102 | -d $(srctree)/include/config -o \ | |
1103 | -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ | |
1104 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ | |
1105 | echo >&2 " in the '$(srctree)' directory.";\ | |
1106 | /bin/false; \ | |
1107 | fi; | |
1108 | endif | |
1109 | ||
1110 | prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ | |
1111 | include/generated/utsrelease.h | |
1112 | $(cmd_crmodverdir) | |
1113 | ||
1114 | archprepare: archheaders archscripts prepare1 scripts | |
1115 | ||
1116 | prepare0: archprepare | |
1117 | $(Q)$(MAKE) $(build)=scripts/mod | |
1118 | $(Q)$(MAKE) $(build)=. | |
1119 | ||
1120 | # All the preparing.. | |
1121 | prepare: prepare0 prepare-objtool | |
1122 | ||
1123 | # Support for using generic headers in asm-generic | |
1124 | asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj | |
1125 | ||
1126 | PHONY += asm-generic uapi-asm-generic | |
1127 | asm-generic: uapi-asm-generic | |
1128 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ | |
1129 | generic=include/asm-generic | |
1130 | uapi-asm-generic: | |
1131 | $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ | |
1132 | generic=include/uapi/asm-generic | |
1133 | ||
1134 | PHONY += prepare-objtool | |
1135 | prepare-objtool: $(objtool_target) | |
1136 | ifeq ($(SKIP_STACK_VALIDATION),1) | |
1137 | ifdef CONFIG_UNWINDER_ORC | |
1138 | @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1139 | @false | |
1140 | else | |
1141 | @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 | |
1142 | endif | |
1143 | endif | |
1144 | ||
1145 | # Generate some files | |
1146 | # --------------------------------------------------------------------------- | |
1147 | ||
1148 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1149 | # needs to be updated, so this check is forced on all builds | |
1150 | ||
1151 | uts_len := 64 | |
1152 | define filechk_utsrelease.h | |
1153 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1154 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1155 | exit 1; \ | |
1156 | fi; \ | |
1157 | echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" | |
1158 | endef | |
1159 | ||
1160 | define filechk_version.h | |
1161 | echo \#define LINUX_VERSION_CODE $(shell \ | |
1162 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
1163 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' | |
1164 | endef | |
1165 | ||
1166 | $(version_h): FORCE | |
1167 | $(call filechk,version.h) | |
1168 | $(Q)rm -f $(old_version_h) | |
1169 | ||
1170 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1171 | $(call filechk,utsrelease.h) | |
1172 | ||
1173 | PHONY += headerdep | |
1174 | headerdep: | |
1175 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
1176 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
1177 | ||
1178 | # --------------------------------------------------------------------------- | |
1179 | # Kernel headers | |
1180 | ||
1181 | #Default location for installed headers | |
1182 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1183 | ||
1184 | # If we do an all arch process set dst to include/arch-$(SRCARCH) | |
1185 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) | |
1186 | ||
1187 | PHONY += archheaders archscripts | |
1188 | ||
1189 | PHONY += __headers | |
1190 | __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts | |
1191 | $(Q)$(MAKE) $(build)=scripts build_unifdef | |
1192 | ||
1193 | PHONY += headers_install_all | |
1194 | headers_install_all: | |
1195 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
1196 | ||
1197 | PHONY += headers_install | |
1198 | headers_install: __headers | |
1199 | $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ | |
1200 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
1201 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include | |
1202 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) | |
1203 | ||
1204 | PHONY += headers_check_all | |
1205 | headers_check_all: headers_install_all | |
1206 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check | |
1207 | ||
1208 | PHONY += headers_check | |
1209 | headers_check: headers_install | |
1210 | $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 | |
1211 | $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 | |
1212 | ||
1213 | ifdef CONFIG_HEADERS_CHECK | |
1214 | all: headers_check | |
1215 | endif | |
1216 | ||
1217 | # --------------------------------------------------------------------------- | |
1218 | # Kernel selftest | |
1219 | ||
1220 | PHONY += kselftest | |
1221 | kselftest: | |
1222 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests | |
1223 | ||
1224 | PHONY += kselftest-clean | |
1225 | kselftest-clean: | |
1226 | $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean | |
1227 | ||
1228 | PHONY += kselftest-merge | |
1229 | kselftest-merge: | |
1230 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1231 | $(Q)find $(srctree)/tools/testing/selftests -name config | \ | |
1232 | xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config | |
1233 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1234 | ||
1235 | # --------------------------------------------------------------------------- | |
1236 | # Devicetree files | |
1237 | ||
1238 | ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) | |
1239 | dtstree := arch/$(SRCARCH)/boot/dts | |
1240 | endif | |
1241 | ||
1242 | ifneq ($(dtstree),) | |
1243 | ||
1244 | %.dtb: prepare3 scripts_dtc | |
1245 | $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ | |
1246 | ||
1247 | PHONY += dtbs dtbs_install dt_binding_check | |
1248 | dtbs dtbs_check: prepare3 scripts_dtc | |
1249 | $(Q)$(MAKE) $(build)=$(dtstree) | |
1250 | ||
1251 | dtbs_check: export CHECK_DTBS=1 | |
1252 | dtbs_check: dt_binding_check | |
1253 | ||
1254 | dtbs_install: | |
1255 | $(Q)$(MAKE) $(dtbinst)=$(dtstree) | |
1256 | ||
1257 | ifdef CONFIG_OF_EARLY_FLATTREE | |
1258 | all: dtbs | |
1259 | endif | |
1260 | ||
1261 | endif | |
1262 | ||
1263 | PHONY += scripts_dtc | |
1264 | scripts_dtc: scripts_basic | |
1265 | $(Q)$(MAKE) $(build)=scripts/dtc | |
1266 | ||
1267 | dt_binding_check: scripts_dtc | |
1268 | $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings | |
1269 | ||
1270 | # --------------------------------------------------------------------------- | |
1271 | # Modules | |
1272 | ||
1273 | ifdef CONFIG_MODULES | |
1274 | ||
1275 | # By default, build modules as well | |
1276 | ||
1277 | all: modules | |
1278 | ||
1279 | # Build modules | |
1280 | # | |
1281 | # A module can be listed more than once in obj-m resulting in | |
1282 | # duplicate lines in modules.order files. Those are removed | |
1283 | # using awk while concatenating to the final file. | |
1284 | ||
1285 | PHONY += modules | |
1286 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin | |
1287 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order | |
1288 | @$(kecho) ' Building modules, stage 2.'; | |
1289 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1290 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh | |
1291 | ||
1292 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) | |
1293 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1294 | ||
1295 | %/modules.builtin: include/config/auto.conf include/config/tristate.conf | |
1296 | $(Q)$(MAKE) $(modbuiltin)=$* | |
1297 | ||
1298 | ||
1299 | # Target to prepare building external modules | |
1300 | PHONY += modules_prepare | |
1301 | modules_prepare: prepare | |
1302 | ||
1303 | # Target to install modules | |
1304 | PHONY += modules_install | |
1305 | modules_install: _modinst_ _modinst_post | |
1306 | ||
1307 | PHONY += _modinst_ | |
1308 | _modinst_: | |
1309 | @rm -rf $(MODLIB)/kernel | |
1310 | @rm -f $(MODLIB)/source | |
1311 | @mkdir -p $(MODLIB)/kernel | |
1312 | @ln -s $(abspath $(srctree)) $(MODLIB)/source | |
1313 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1314 | rm -f $(MODLIB)/build ; \ | |
1315 | ln -s $(CURDIR) $(MODLIB)/build ; \ | |
1316 | fi | |
1317 | @cp -f $(objtree)/modules.order $(MODLIB)/ | |
1318 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ | |
1319 | @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ | |
1320 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1321 | ||
1322 | # This depmod is only for convenience to give the initial | |
1323 | # boot a modules.dep even before / is mounted read-write. However the | |
1324 | # boot script depmod is the master version. | |
1325 | PHONY += _modinst_post | |
1326 | _modinst_post: _modinst_ | |
1327 | $(call cmd,depmod) | |
1328 | ||
1329 | ifeq ($(CONFIG_MODULE_SIG), y) | |
1330 | PHONY += modules_sign | |
1331 | modules_sign: | |
1332 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1333 | endif | |
1334 | ||
1335 | else # CONFIG_MODULES | |
1336 | ||
1337 | # Modules not configured | |
1338 | # --------------------------------------------------------------------------- | |
1339 | ||
1340 | PHONY += modules modules_install | |
1341 | modules modules_install: | |
1342 | @echo >&2 | |
1343 | @echo >&2 "The present kernel configuration has modules disabled." | |
1344 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1345 | @echo >&2 "Then build a kernel with module support enabled." | |
1346 | @echo >&2 | |
1347 | @exit 1 | |
1348 | ||
1349 | endif # CONFIG_MODULES | |
1350 | ||
1351 | ### | |
1352 | # Cleaning is done on three levels. | |
1353 | # make clean Delete most generated files | |
1354 | # Leave enough to build external modules | |
1355 | # make mrproper Delete the current configuration, and all generated files | |
1356 | # make distclean Remove editor backup files, patch leftover files and the like | |
1357 | ||
1358 | # Directories & files removed with 'make clean' | |
1359 | CLEAN_DIRS += $(MODVERDIR) include/ksym | |
1360 | CLEAN_FILES += modules.builtin.modinfo | |
1361 | ||
1362 | # Directories & files removed with 'make mrproper' | |
1363 | MRPROPER_DIRS += include/config usr/include include/generated \ | |
1364 | arch/$(SRCARCH)/include/generated .tmp_objdiff | |
1365 | MRPROPER_FILES += .config .config.old .version \ | |
1366 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ | |
1367 | signing_key.pem signing_key.priv signing_key.x509 \ | |
1368 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
1369 | signing_key.x509.signer vmlinux-gdb.py | |
1370 | ||
1371 | # clean - Delete most, but leave enough to build external modules | |
1372 | # | |
1373 | clean: rm-dirs := $(CLEAN_DIRS) | |
1374 | clean: rm-files := $(CLEAN_FILES) | |
1375 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs)) | |
1376 | ||
1377 | PHONY += $(clean-dirs) clean archclean vmlinuxclean | |
1378 | $(clean-dirs): | |
1379 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1380 | ||
1381 | vmlinuxclean: | |
1382 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1383 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) | |
1384 | ||
1385 | clean: archclean vmlinuxclean | |
1386 | ||
1387 | # mrproper - Delete all generated files, including .config | |
1388 | # | |
1389 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1390 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1391 | mrproper-dirs := $(addprefix _mrproper_,scripts) | |
1392 | ||
1393 | PHONY += $(mrproper-dirs) mrproper | |
1394 | $(mrproper-dirs): | |
1395 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1396 | ||
1397 | mrproper: clean $(mrproper-dirs) | |
1398 | $(call cmd,rmdirs) | |
1399 | $(call cmd,rmfiles) | |
1400 | ||
1401 | # distclean | |
1402 | # | |
1403 | PHONY += distclean | |
1404 | ||
1405 | distclean: mrproper | |
1406 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
1407 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1408 | -o -name '*.bak' -o -name '#*#' -o -name '*%' \ | |
1409 | -o -name 'core' \) \ | |
1410 | -type f -print | xargs rm -f | |
1411 | ||
1412 | ||
1413 | # Packaging of the kernel to various formats | |
1414 | # --------------------------------------------------------------------------- | |
1415 | package-dir := scripts/package | |
1416 | ||
1417 | %src-pkg: FORCE | |
1418 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1419 | %pkg: include/config/kernel.release FORCE | |
1420 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1421 | ||
1422 | ||
1423 | # Brief documentation of the typical targets used | |
1424 | # --------------------------------------------------------------------------- | |
1425 | ||
1426 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1427 | boards := $(sort $(notdir $(boards))) | |
1428 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1429 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1430 | ||
1431 | PHONY += help | |
1432 | help: | |
1433 | @echo 'Cleaning targets:' | |
1434 | @echo ' clean - Remove most generated files but keep the config and' | |
1435 | @echo ' enough build support to build external modules' | |
1436 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1437 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1438 | @echo '' | |
1439 | @echo 'Configuration targets:' | |
1440 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1441 | @echo '' | |
1442 | @echo 'Other generic targets:' | |
1443 | @echo ' all - Build all targets marked with [*]' | |
1444 | @echo '* vmlinux - Build the bare kernel' | |
1445 | @echo '* modules - Build all modules' | |
1446 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1447 | @echo ' dir/ - Build all files in dir and below' | |
1448 | @echo ' dir/file.[ois] - Build specified target only' | |
1449 | @echo ' dir/file.ll - Build the LLVM assembly file' | |
1450 | @echo ' (requires compiler support for LLVM assembly generation)' | |
1451 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1452 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1453 | @echo ' dir/file.ko - Build module including final link' | |
1454 | @echo ' modules_prepare - Set up for building external modules' | |
1455 | @echo ' tags/TAGS - Generate tags file for editors' | |
1456 | @echo ' cscope - Generate cscope index' | |
1457 | @echo ' gtags - Generate GNU GLOBAL index' | |
1458 | @echo ' kernelrelease - Output the release version string (use with make -s)' | |
1459 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1460 | @echo ' image_name - Output the image name (use with make -s)' | |
1461 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1462 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1463 | echo '' | |
1464 | @echo 'Static analysers:' | |
1465 | @echo ' checkstack - Generate a list of stack hogs' | |
1466 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1467 | @echo ' versioncheck - Sanity check on version.h usage' | |
1468 | @echo ' includecheck - Check for duplicate included header files' | |
1469 | @echo ' export_report - List the usages of all exported symbols' | |
1470 | @echo ' headers_check - Sanity check on exported headers' | |
1471 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1472 | @echo ' coccicheck - Check with Coccinelle' | |
1473 | @echo '' | |
1474 | @echo 'Kernel selftest:' | |
1475 | @echo ' kselftest - Build and run kernel selftest (run as root)' | |
1476 | @echo ' Build, install, and boot kernel before' | |
1477 | @echo ' running kselftest on it' | |
1478 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1479 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' | |
1480 | @echo ' .config.' | |
1481 | @echo '' | |
1482 | @$(if $(dtstree), \ | |
1483 | echo 'Devicetree:'; \ | |
1484 | echo '* dtbs - Build device tree blobs for enabled boards'; \ | |
1485 | echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ | |
1486 | echo '') | |
1487 | ||
1488 | @echo 'Userspace tools targets:' | |
1489 | @echo ' use "make tools/help"' | |
1490 | @echo ' or "cd tools; make help"' | |
1491 | @echo '' | |
1492 | @echo 'Kernel packaging:' | |
1493 | @$(MAKE) $(build)=$(package-dir) help | |
1494 | @echo '' | |
1495 | @echo 'Documentation targets:' | |
1496 | @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp | |
1497 | @echo '' | |
1498 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1499 | @$(if $(archhelp),$(archhelp),\ | |
1500 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1501 | @echo '' | |
1502 | @$(if $(boards), \ | |
1503 | $(foreach b, $(boards), \ | |
1504 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1505 | echo '') | |
1506 | @$(if $(board-dirs), \ | |
1507 | $(foreach b, $(board-dirs), \ | |
1508 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1509 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1510 | echo '') | |
1511 | ||
1512 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1513 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' | |
1514 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1515 | @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' | |
1516 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1517 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1518 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' | |
1519 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1520 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1521 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1522 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1523 | @echo '' | |
1524 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1525 | @echo 'For further info see the ./README file' | |
1526 | ||
1527 | ||
1528 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1529 | ||
1530 | help-boards: $(help-board-dirs) | |
1531 | ||
1532 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) | |
1533 | ||
1534 | $(help-board-dirs): help-%: | |
1535 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1536 | @$(if $(boards-per-dir), \ | |
1537 | $(foreach b, $(boards-per-dir), \ | |
1538 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1539 | echo '') | |
1540 | ||
1541 | ||
1542 | # Documentation targets | |
1543 | # --------------------------------------------------------------------------- | |
1544 | DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ | |
1545 | linkcheckdocs dochelp refcheckdocs | |
1546 | PHONY += $(DOC_TARGETS) | |
1547 | $(DOC_TARGETS): scripts_basic FORCE | |
1548 | $(Q)$(MAKE) $(build)=Documentation $@ | |
1549 | ||
1550 | # Misc | |
1551 | # --------------------------------------------------------------------------- | |
1552 | ||
1553 | PHONY += scripts_gdb | |
1554 | scripts_gdb: prepare | |
1555 | $(Q)$(MAKE) $(build)=scripts/gdb | |
1556 | $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) | |
1557 | ||
1558 | ifdef CONFIG_GDB_SCRIPTS | |
1559 | all: scripts_gdb | |
1560 | endif | |
1561 | ||
1562 | else # KBUILD_EXTMOD | |
1563 | ||
1564 | ### | |
1565 | # External module support. | |
1566 | # When building external modules the kernel used as basis is considered | |
1567 | # read-only, and no consistency checks are made and the make | |
1568 | # system is not used on the basis kernel. If updates are required | |
1569 | # in the basis kernel ordinary make commands (without M=...) must | |
1570 | # be used. | |
1571 | # | |
1572 | # The following are the only valid targets when building external | |
1573 | # modules. | |
1574 | # make M=dir clean Delete all automatically generated files | |
1575 | # make M=dir modules Make all modules in specified dir | |
1576 | # make M=dir Same as 'make M=dir modules' | |
1577 | # make M=dir modules_install | |
1578 | # Install the modules built in the module directory | |
1579 | # Assumes install directory is already created | |
1580 | ||
1581 | # We are always building modules | |
1582 | KBUILD_MODULES := 1 | |
1583 | ||
1584 | PHONY += $(objtree)/Module.symvers | |
1585 | $(objtree)/Module.symvers: | |
1586 | @test -e $(objtree)/Module.symvers || ( \ | |
1587 | echo; \ | |
1588 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1589 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1590 | echo ) | |
1591 | ||
1592 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
1593 | PHONY += $(module-dirs) modules | |
1594 | $(module-dirs): prepare $(objtree)/Module.symvers | |
1595 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1596 | ||
1597 | modules: $(module-dirs) | |
1598 | @$(kecho) ' Building modules, stage 2.'; | |
1599 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1600 | ||
1601 | PHONY += modules_install | |
1602 | modules_install: _emodinst_ _emodinst_post | |
1603 | ||
1604 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | |
1605 | PHONY += _emodinst_ | |
1606 | _emodinst_: | |
1607 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | |
1608 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1609 | ||
1610 | PHONY += _emodinst_post | |
1611 | _emodinst_post: _emodinst_ | |
1612 | $(call cmd,depmod) | |
1613 | ||
1614 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | |
1615 | ||
1616 | PHONY += $(clean-dirs) clean | |
1617 | $(clean-dirs): | |
1618 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1619 | ||
1620 | clean: rm-dirs := $(MODVERDIR) | |
1621 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers | |
1622 | ||
1623 | PHONY += help | |
1624 | help: | |
1625 | @echo ' Building external modules.' | |
1626 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1627 | @echo '' | |
1628 | @echo ' modules - default target, build the module(s)' | |
1629 | @echo ' modules_install - install the module' | |
1630 | @echo ' clean - remove generated files in module directory only' | |
1631 | @echo '' | |
1632 | ||
1633 | PHONY += prepare | |
1634 | prepare: | |
1635 | $(cmd_crmodverdir) | |
1636 | endif # KBUILD_EXTMOD | |
1637 | ||
1638 | clean: $(clean-dirs) | |
1639 | $(call cmd,rmdirs) | |
1640 | $(call cmd,rmfiles) | |
1641 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1642 | \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1643 | -o -name '*.ko.*' \ | |
1644 | -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ | |
1645 | -o -name '*.dwo' -o -name '*.lst' \ | |
1646 | -o -name '*.su' \ | |
1647 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1648 | -o -name '*.lex.c' -o -name '*.tab.[ch]' \ | |
1649 | -o -name '*.asn1.[ch]' \ | |
1650 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1651 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
1652 | -o -name '*.c.[012]*.*' \ | |
1653 | -o -name '*.ll' \ | |
1654 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1655 | ||
1656 | # Generate tags for editors | |
1657 | # --------------------------------------------------------------------------- | |
1658 | quiet_cmd_tags = GEN $@ | |
1659 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1660 | ||
1661 | tags TAGS cscope gtags: FORCE | |
1662 | $(call cmd,tags) | |
1663 | ||
1664 | # Scripts to check various things for consistency | |
1665 | # --------------------------------------------------------------------------- | |
1666 | ||
1667 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report | |
1668 | ||
1669 | includecheck: | |
1670 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1671 | -name '*.[hcS]' -type f -print | sort \ | |
1672 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1673 | ||
1674 | versioncheck: | |
1675 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1676 | -name '*.[hcS]' -type f -print | sort \ | |
1677 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
1678 | ||
1679 | coccicheck: | |
1680 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1681 | ||
1682 | namespacecheck: | |
1683 | $(PERL) $(srctree)/scripts/namespace.pl | |
1684 | ||
1685 | export_report: | |
1686 | $(PERL) $(srctree)/scripts/export_report.pl | |
1687 | ||
1688 | PHONY += checkstack kernelrelease kernelversion image_name | |
1689 | ||
1690 | # UML needs a little special treatment here. It wants to use the host | |
1691 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1692 | # else wants $(ARCH), including people doing cross-builds, which means | |
1693 | # that $(SUBARCH) doesn't work here. | |
1694 | ifeq ($(ARCH), um) | |
1695 | CHECKSTACK_ARCH := $(SUBARCH) | |
1696 | else | |
1697 | CHECKSTACK_ARCH := $(ARCH) | |
1698 | endif | |
1699 | checkstack: | |
1700 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1701 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
1702 | ||
1703 | kernelrelease: | |
1704 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1705 | ||
1706 | kernelversion: | |
1707 | @echo $(KERNELVERSION) | |
1708 | ||
1709 | image_name: | |
1710 | @echo $(KBUILD_IMAGE) | |
1711 | ||
1712 | # Clear a bunch of variables before executing the submake | |
1713 | ||
1714 | ifeq ($(quiet),silent_) | |
1715 | tools_silent=s | |
1716 | endif | |
1717 | ||
1718 | tools/: FORCE | |
1719 | $(Q)mkdir -p $(objtree)/tools | |
1720 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ | |
1721 | ||
1722 | tools/%: FORCE | |
1723 | $(Q)mkdir -p $(objtree)/tools | |
1724 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* | |
1725 | ||
1726 | # Single targets | |
1727 | # --------------------------------------------------------------------------- | |
1728 | # Single targets are compatible with: | |
1729 | # - build with mixed source and output | |
1730 | # - build with separate output dir 'make O=...' | |
1731 | # - external modules | |
1732 | # | |
1733 | # target-dir => where to store outputfile | |
1734 | # build-dir => directory in kernel source tree to use | |
1735 | ||
1736 | build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ | |
1737 | build-dir = $(patsubst %/,%,$(dir $(build-target))) | |
1738 | ||
1739 | %.i: prepare FORCE | |
1740 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1741 | %.ll: prepare FORCE | |
1742 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1743 | %.lst: prepare FORCE | |
1744 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1745 | %.o: prepare FORCE | |
1746 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1747 | %.s: prepare FORCE | |
1748 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1749 | %.symtypes: prepare FORCE | |
1750 | $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) | |
1751 | %.ko: %.o | |
1752 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1753 | ||
1754 | # Modules | |
1755 | PHONY += / | |
1756 | /: ./ | |
1757 | ||
1758 | # Make sure the latest headers are built for Documentation | |
1759 | Documentation/ samples/: headers_install | |
1760 | %/: prepare FORCE | |
1761 | $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) | |
1762 | ||
1763 | # FIXME Should go into a make.lib or something | |
1764 | # =========================================================================== | |
1765 | ||
1766 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1767 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1768 | ||
1769 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1770 | cmd_rmfiles = rm -f $(rm-files) | |
1771 | ||
1772 | # Run depmod only if we have System.map and depmod is executable | |
1773 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1774 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ | |
1775 | $(KERNELRELEASE) | |
1776 | ||
1777 | # Create temporary dir for module support files | |
1778 | # clean it up only when building all modules | |
1779 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1780 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1781 | ||
1782 | # read saved command lines for existing targets | |
1783 | existing-targets := $(wildcard $(sort $(targets))) | |
1784 | ||
1785 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
1786 | ||
1787 | endif # ifeq ($(config-targets),1) | |
1788 | endif # ifeq ($(mixed-targets),1) | |
1789 | endif # need-sub-make | |
1790 | ||
1791 | PHONY += FORCE | |
1792 | FORCE: | |
1793 | ||
1794 | # Declare the contents of the PHONY variable as phony. We keep that | |
1795 | # information in a variable so we can use it in if_changed and friends. | |
1796 | .PHONY: $(PHONY) |