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1 | VERSION = 4 | |
2 | PATCHLEVEL = 9 | |
3 | SUBLEVEL = 0 | |
4 | EXTRAVERSION = -rc1 | |
5 | NAME = Psychotic Stoned Sheep | |
6 | ||
7 | # *DOCUMENTATION* | |
8 | # To see a list of typical targets execute "make help" | |
9 | # More info can be located in ./README | |
10 | # Comments in this file are targeted only to the developer, do not | |
11 | # expect to learn how to build the kernel reading this file. | |
12 | ||
13 | # o Do not use make's built-in rules and variables | |
14 | # (this increases performance and avoids hard-to-debug behaviour); | |
15 | # o Look for make include files relative to root of kernel src | |
16 | MAKEFLAGS += -rR --include-dir=$(CURDIR) | |
17 | ||
18 | # Avoid funny character set dependencies | |
19 | unexport LC_ALL | |
20 | LC_COLLATE=C | |
21 | LC_NUMERIC=C | |
22 | export LC_COLLATE LC_NUMERIC | |
23 | ||
24 | # Avoid interference with shell env settings | |
25 | unexport GREP_OPTIONS | |
26 | ||
27 | # We are using a recursive build, so we need to do a little thinking | |
28 | # to get the ordering right. | |
29 | # | |
30 | # Most importantly: sub-Makefiles should only ever modify files in | |
31 | # their own directory. If in some directory we have a dependency on | |
32 | # a file in another dir (which doesn't happen often, but it's often | |
33 | # unavoidable when linking the built-in.o targets which finally | |
34 | # turn into vmlinux), we will call a sub make in that other dir, and | |
35 | # after that we are sure that everything which is in that other dir | |
36 | # is now up to date. | |
37 | # | |
38 | # The only cases where we need to modify files which have global | |
39 | # effects are thus separated out and done before the recursive | |
40 | # descending is started. They are now explicitly listed as the | |
41 | # prepare rule. | |
42 | ||
43 | # Beautify output | |
44 | # --------------------------------------------------------------------------- | |
45 | # | |
46 | # Normally, we echo the whole command before executing it. By making | |
47 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
48 | # $(quiet) to choose other forms of output instead, e.g. | |
49 | # | |
50 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
51 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
52 | # | |
53 | # If $(quiet) is empty, the whole command will be printed. | |
54 | # If it is set to "quiet_", only the short version will be printed. | |
55 | # If it is set to "silent_", nothing will be printed at all, since | |
56 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
57 | # | |
58 | # A simple variant is to prefix commands with $(Q) - that's useful | |
59 | # for commands that shall be hidden in non-verbose mode. | |
60 | # | |
61 | # $(Q)ln $@ :< | |
62 | # | |
63 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
64 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
65 | # | |
66 | # To put more focus on warnings, be less verbose as default | |
67 | # Use 'make V=1' to see the full commands | |
68 | ||
69 | ifeq ("$(origin V)", "command line") | |
70 | KBUILD_VERBOSE = $(V) | |
71 | endif | |
72 | ifndef KBUILD_VERBOSE | |
73 | KBUILD_VERBOSE = 0 | |
74 | endif | |
75 | ||
76 | ifeq ($(KBUILD_VERBOSE),1) | |
77 | quiet = | |
78 | Q = | |
79 | else | |
80 | quiet=quiet_ | |
81 | Q = @ | |
82 | endif | |
83 | ||
84 | # If the user is running make -s (silent mode), suppress echoing of | |
85 | # commands | |
86 | ||
87 | ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 | |
88 | ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) | |
89 | quiet=silent_ | |
90 | endif | |
91 | else # make-3.8x | |
92 | ifneq ($(filter s% -s%,$(MAKEFLAGS)),) | |
93 | quiet=silent_ | |
94 | endif | |
95 | endif | |
96 | ||
97 | export quiet Q KBUILD_VERBOSE | |
98 | ||
99 | # kbuild supports saving output files in a separate directory. | |
100 | # To locate output files in a separate directory two syntaxes are supported. | |
101 | # In both cases the working directory must be the root of the kernel src. | |
102 | # 1) O= | |
103 | # Use "make O=dir/to/store/output/files/" | |
104 | # | |
105 | # 2) Set KBUILD_OUTPUT | |
106 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
107 | # where the output files shall be placed. | |
108 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
109 | # make | |
110 | # | |
111 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
112 | # variable. | |
113 | ||
114 | # KBUILD_SRC is set on invocation of make in OBJ directory | |
115 | # KBUILD_SRC is not intended to be used by the regular user (for now) | |
116 | ifeq ($(KBUILD_SRC),) | |
117 | ||
118 | # OK, Make called in directory where kernel src resides | |
119 | # Do we want to locate output files in a separate directory? | |
120 | ifeq ("$(origin O)", "command line") | |
121 | KBUILD_OUTPUT := $(O) | |
122 | endif | |
123 | ||
124 | # That's our default target when none is given on the command line | |
125 | PHONY := _all | |
126 | _all: | |
127 | ||
128 | # Cancel implicit rules on top Makefile | |
129 | $(CURDIR)/Makefile Makefile: ; | |
130 | ||
131 | ifneq ($(words $(subst :, ,$(CURDIR))), 1) | |
132 | $(error main directory cannot contain spaces nor colons) | |
133 | endif | |
134 | ||
135 | ifneq ($(KBUILD_OUTPUT),) | |
136 | # Invoke a second make in the output directory, passing relevant variables | |
137 | # check that the output directory actually exists | |
138 | saved-output := $(KBUILD_OUTPUT) | |
139 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ | |
140 | && /bin/pwd) | |
141 | $(if $(KBUILD_OUTPUT),, \ | |
142 | $(error failed to create output directory "$(saved-output)")) | |
143 | ||
144 | PHONY += $(MAKECMDGOALS) sub-make | |
145 | ||
146 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make | |
147 | @: | |
148 | ||
149 | sub-make: | |
150 | $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ | |
151 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) | |
152 | ||
153 | # Leave processing to above invocation of make | |
154 | skip-makefile := 1 | |
155 | endif # ifneq ($(KBUILD_OUTPUT),) | |
156 | endif # ifeq ($(KBUILD_SRC),) | |
157 | ||
158 | # We process the rest of the Makefile if this is the final invocation of make | |
159 | ifeq ($(skip-makefile),) | |
160 | ||
161 | # Do not print "Entering directory ...", | |
162 | # but we want to display it when entering to the output directory | |
163 | # so that IDEs/editors are able to understand relative filenames. | |
164 | MAKEFLAGS += --no-print-directory | |
165 | ||
166 | # Call a source code checker (by default, "sparse") as part of the | |
167 | # C compilation. | |
168 | # | |
169 | # Use 'make C=1' to enable checking of only re-compiled files. | |
170 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
171 | # of whether they are re-compiled or not. | |
172 | # | |
173 | # See the file "Documentation/sparse.txt" for more details, including | |
174 | # where to get the "sparse" utility. | |
175 | ||
176 | ifeq ("$(origin C)", "command line") | |
177 | KBUILD_CHECKSRC = $(C) | |
178 | endif | |
179 | ifndef KBUILD_CHECKSRC | |
180 | KBUILD_CHECKSRC = 0 | |
181 | endif | |
182 | ||
183 | # Use make M=dir to specify directory of external module to build | |
184 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
185 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
186 | ifdef SUBDIRS | |
187 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
188 | endif | |
189 | ||
190 | ifeq ("$(origin M)", "command line") | |
191 | KBUILD_EXTMOD := $(M) | |
192 | endif | |
193 | ||
194 | # If building an external module we do not care about the all: rule | |
195 | # but instead _all depend on modules | |
196 | PHONY += all | |
197 | ifeq ($(KBUILD_EXTMOD),) | |
198 | _all: all | |
199 | else | |
200 | _all: modules | |
201 | endif | |
202 | ||
203 | ifeq ($(KBUILD_SRC),) | |
204 | # building in the source tree | |
205 | srctree := . | |
206 | else | |
207 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
208 | # building in a subdirectory of the source tree | |
209 | srctree := .. | |
210 | else | |
211 | srctree := $(KBUILD_SRC) | |
212 | endif | |
213 | endif | |
214 | objtree := . | |
215 | src := $(srctree) | |
216 | obj := $(objtree) | |
217 | ||
218 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) | |
219 | ||
220 | export srctree objtree VPATH | |
221 | ||
222 | # SUBARCH tells the usermode build what the underlying arch is. That is set | |
223 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
224 | # line overrides the setting of ARCH below. If a native build is happening, | |
225 | # then ARCH is assigned, getting whatever value it gets normally, and | |
226 | # SUBARCH is subsequently ignored. | |
227 | ||
228 | SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ | |
229 | -e s/sun4u/sparc64/ \ | |
230 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | |
231 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ | |
232 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ | |
233 | -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) | |
234 | ||
235 | # Cross compiling and selecting different set of gcc/bin-utils | |
236 | # --------------------------------------------------------------------------- | |
237 | # | |
238 | # When performing cross compilation for other architectures ARCH shall be set | |
239 | # to the target architecture. (See arch/* for the possibilities). | |
240 | # ARCH can be set during invocation of make: | |
241 | # make ARCH=ia64 | |
242 | # Another way is to have ARCH set in the environment. | |
243 | # The default ARCH is the host where make is executed. | |
244 | ||
245 | # CROSS_COMPILE specify the prefix used for all executables used | |
246 | # during compilation. Only gcc and related bin-utils executables | |
247 | # are prefixed with $(CROSS_COMPILE). | |
248 | # CROSS_COMPILE can be set on the command line | |
249 | # make CROSS_COMPILE=ia64-linux- | |
250 | # Alternatively CROSS_COMPILE can be set in the environment. | |
251 | # A third alternative is to store a setting in .config so that plain | |
252 | # "make" in the configured kernel build directory always uses that. | |
253 | # Default value for CROSS_COMPILE is not to prefix executables | |
254 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
255 | ARCH ?= $(SUBARCH) | |
256 | CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) | |
257 | ||
258 | # Architecture as present in compile.h | |
259 | UTS_MACHINE := $(ARCH) | |
260 | SRCARCH := $(ARCH) | |
261 | ||
262 | # Additional ARCH settings for x86 | |
263 | ifeq ($(ARCH),i386) | |
264 | SRCARCH := x86 | |
265 | endif | |
266 | ifeq ($(ARCH),x86_64) | |
267 | SRCARCH := x86 | |
268 | endif | |
269 | ||
270 | # Additional ARCH settings for sparc | |
271 | ifeq ($(ARCH),sparc32) | |
272 | SRCARCH := sparc | |
273 | endif | |
274 | ifeq ($(ARCH),sparc64) | |
275 | SRCARCH := sparc | |
276 | endif | |
277 | ||
278 | # Additional ARCH settings for sh | |
279 | ifeq ($(ARCH),sh64) | |
280 | SRCARCH := sh | |
281 | endif | |
282 | ||
283 | # Additional ARCH settings for tile | |
284 | ifeq ($(ARCH),tilepro) | |
285 | SRCARCH := tile | |
286 | endif | |
287 | ifeq ($(ARCH),tilegx) | |
288 | SRCARCH := tile | |
289 | endif | |
290 | ||
291 | # Where to locate arch specific headers | |
292 | hdr-arch := $(SRCARCH) | |
293 | ||
294 | KCONFIG_CONFIG ?= .config | |
295 | export KCONFIG_CONFIG | |
296 | ||
297 | # SHELL used by kbuild | |
298 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
299 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
300 | else echo sh; fi ; fi) | |
301 | ||
302 | HOSTCC = gcc | |
303 | HOSTCXX = g++ | |
304 | HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 | |
305 | HOSTCXXFLAGS = -O2 | |
306 | ||
307 | ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) | |
308 | HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ | |
309 | -Wno-missing-field-initializers -fno-delete-null-pointer-checks | |
310 | endif | |
311 | ||
312 | # Decide whether to build built-in, modular, or both. | |
313 | # Normally, just do built-in. | |
314 | ||
315 | KBUILD_MODULES := | |
316 | KBUILD_BUILTIN := 1 | |
317 | ||
318 | # If we have only "make modules", don't compile built-in objects. | |
319 | # When we're building modules with modversions, we need to consider | |
320 | # the built-in objects during the descend as well, in order to | |
321 | # make sure the checksums are up to date before we record them. | |
322 | ||
323 | ifeq ($(MAKECMDGOALS),modules) | |
324 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
325 | endif | |
326 | ||
327 | # If we have "make <whatever> modules", compile modules | |
328 | # in addition to whatever we do anyway. | |
329 | # Just "make" or "make all" shall build modules as well | |
330 | ||
331 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
332 | KBUILD_MODULES := 1 | |
333 | endif | |
334 | ||
335 | ifeq ($(MAKECMDGOALS),) | |
336 | KBUILD_MODULES := 1 | |
337 | endif | |
338 | ||
339 | export KBUILD_MODULES KBUILD_BUILTIN | |
340 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD | |
341 | ||
342 | # We need some generic definitions (do not try to remake the file). | |
343 | scripts/Kbuild.include: ; | |
344 | include scripts/Kbuild.include | |
345 | ||
346 | # Make variables (CC, etc...) | |
347 | AS = $(CROSS_COMPILE)as | |
348 | LD = $(CROSS_COMPILE)ld | |
349 | CC = $(CROSS_COMPILE)gcc | |
350 | CPP = $(CC) -E | |
351 | AR = $(CROSS_COMPILE)ar | |
352 | NM = $(CROSS_COMPILE)nm | |
353 | STRIP = $(CROSS_COMPILE)strip | |
354 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
355 | OBJDUMP = $(CROSS_COMPILE)objdump | |
356 | AWK = awk | |
357 | GENKSYMS = scripts/genksyms/genksyms | |
358 | INSTALLKERNEL := installkernel | |
359 | DEPMOD = /sbin/depmod | |
360 | PERL = perl | |
361 | PYTHON = python | |
362 | CHECK = sparse | |
363 | ||
364 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
365 | -Wbitwise -Wno-return-void $(CF) | |
366 | NOSTDINC_FLAGS = | |
367 | CFLAGS_MODULE = | |
368 | AFLAGS_MODULE = | |
369 | LDFLAGS_MODULE = | |
370 | CFLAGS_KERNEL = | |
371 | AFLAGS_KERNEL = | |
372 | LDFLAGS_vmlinux = | |
373 | CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im | |
374 | CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) | |
375 | ||
376 | ||
377 | # Use USERINCLUDE when you must reference the UAPI directories only. | |
378 | USERINCLUDE := \ | |
379 | -I$(srctree)/arch/$(hdr-arch)/include/uapi \ | |
380 | -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ | |
381 | -I$(srctree)/include/uapi \ | |
382 | -I$(objtree)/include/generated/uapi \ | |
383 | -include $(srctree)/include/linux/kconfig.h | |
384 | ||
385 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
386 | # Needed to be compatible with the O= option | |
387 | LINUXINCLUDE := \ | |
388 | -I$(srctree)/arch/$(hdr-arch)/include \ | |
389 | -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ | |
390 | -I$(objtree)/arch/$(hdr-arch)/include/generated \ | |
391 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ | |
392 | -I$(objtree)/include | |
393 | ||
394 | LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE)) | |
395 | ||
396 | KBUILD_CPPFLAGS := -D__KERNEL__ | |
397 | ||
398 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ | |
399 | -fno-strict-aliasing -fno-common \ | |
400 | -Werror-implicit-function-declaration \ | |
401 | -Wno-format-security \ | |
402 | -std=gnu89 | |
403 | ||
404 | KBUILD_AFLAGS_KERNEL := | |
405 | KBUILD_CFLAGS_KERNEL := | |
406 | KBUILD_AFLAGS := -D__ASSEMBLY__ | |
407 | KBUILD_AFLAGS_MODULE := -DMODULE | |
408 | KBUILD_CFLAGS_MODULE := -DMODULE | |
409 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
410 | ||
411 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) | |
412 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
413 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) | |
414 | ||
415 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION | |
416 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC | |
417 | export CPP AR NM STRIP OBJCOPY OBJDUMP | |
418 | export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE | |
419 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
420 | ||
421 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | |
422 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN | |
423 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
424 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE | |
425 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL | |
426 | export KBUILD_ARFLAGS | |
427 | ||
428 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
429 | # tree rather than in the kernel tree. The kernel tree might | |
430 | # even be read-only. | |
431 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
432 | ||
433 | # Files to ignore in find ... statements | |
434 | ||
435 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ | |
436 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
437 | -prune -o | |
438 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ | |
439 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
440 | ||
441 | # =========================================================================== | |
442 | # Rules shared between *config targets and build targets | |
443 | ||
444 | # Basic helpers built in scripts/ | |
445 | PHONY += scripts_basic | |
446 | scripts_basic: | |
447 | $(Q)$(MAKE) $(build)=scripts/basic | |
448 | $(Q)rm -f .tmp_quiet_recordmcount | |
449 | ||
450 | # To avoid any implicit rule to kick in, define an empty command. | |
451 | scripts/basic/%: scripts_basic ; | |
452 | ||
453 | PHONY += outputmakefile | |
454 | # outputmakefile generates a Makefile in the output directory, if using a | |
455 | # separate output directory. This allows convenient use of make in the | |
456 | # output directory. | |
457 | outputmakefile: | |
458 | ifneq ($(KBUILD_SRC),) | |
459 | $(Q)ln -fsn $(srctree) source | |
460 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | |
461 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
462 | endif | |
463 | ||
464 | # Support for using generic headers in asm-generic | |
465 | PHONY += asm-generic | |
466 | asm-generic: | |
467 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
468 | src=asm obj=arch/$(SRCARCH)/include/generated/asm | |
469 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
470 | src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm | |
471 | ||
472 | # To make sure we do not include .config for any of the *config targets | |
473 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
474 | # It is allowed to specify more targets when calling make, including | |
475 | # mixing *config targets and build targets. | |
476 | # For example 'make oldconfig all'. | |
477 | # Detect when mixed targets is specified, and make a second invocation | |
478 | # of make so .config is not included in this case either (for *config). | |
479 | ||
480 | version_h := include/generated/uapi/linux/version.h | |
481 | old_version_h := include/linux/version.h | |
482 | ||
483 | no-dot-config-targets := clean mrproper distclean \ | |
484 | cscope gtags TAGS tags help% %docs check% coccicheck \ | |
485 | $(version_h) headers_% archheaders archscripts \ | |
486 | kernelversion %src-pkg | |
487 | ||
488 | config-targets := 0 | |
489 | mixed-targets := 0 | |
490 | dot-config := 1 | |
491 | ||
492 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
493 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
494 | dot-config := 0 | |
495 | endif | |
496 | endif | |
497 | ||
498 | ifeq ($(KBUILD_EXTMOD),) | |
499 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
500 | config-targets := 1 | |
501 | ifneq ($(words $(MAKECMDGOALS)),1) | |
502 | mixed-targets := 1 | |
503 | endif | |
504 | endif | |
505 | endif | |
506 | # install and module_install need also be processed one by one | |
507 | ifneq ($(filter install,$(MAKECMDGOALS)),) | |
508 | ifneq ($(filter modules_install,$(MAKECMDGOALS)),) | |
509 | mixed-targets := 1 | |
510 | endif | |
511 | endif | |
512 | ||
513 | ifeq ($(mixed-targets),1) | |
514 | # =========================================================================== | |
515 | # We're called with mixed targets (*config and build targets). | |
516 | # Handle them one by one. | |
517 | ||
518 | PHONY += $(MAKECMDGOALS) __build_one_by_one | |
519 | ||
520 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
521 | @: | |
522 | ||
523 | __build_one_by_one: | |
524 | $(Q)set -e; \ | |
525 | for i in $(MAKECMDGOALS); do \ | |
526 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
527 | done | |
528 | ||
529 | else | |
530 | ifeq ($(config-targets),1) | |
531 | # =========================================================================== | |
532 | # *config targets only - make sure prerequisites are updated, and descend | |
533 | # in scripts/kconfig to make the *config target | |
534 | ||
535 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
536 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
537 | # used for 'make defconfig' | |
538 | include arch/$(SRCARCH)/Makefile | |
539 | export KBUILD_DEFCONFIG KBUILD_KCONFIG | |
540 | ||
541 | config: scripts_basic outputmakefile FORCE | |
542 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
543 | ||
544 | %config: scripts_basic outputmakefile FORCE | |
545 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
546 | ||
547 | else | |
548 | # =========================================================================== | |
549 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
550 | # targets and others. In general all targets except *config targets. | |
551 | ||
552 | ifeq ($(KBUILD_EXTMOD),) | |
553 | # Additional helpers built in scripts/ | |
554 | # Carefully list dependencies so we do not try to build scripts twice | |
555 | # in parallel | |
556 | PHONY += scripts | |
557 | scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ | |
558 | asm-generic gcc-plugins | |
559 | $(Q)$(MAKE) $(build)=$(@) | |
560 | ||
561 | # Objects we will link into vmlinux / subdirs we need to visit | |
562 | init-y := init/ | |
563 | drivers-y := drivers/ sound/ firmware/ | |
564 | net-y := net/ | |
565 | libs-y := lib/ | |
566 | core-y := usr/ | |
567 | virt-y := virt/ | |
568 | endif # KBUILD_EXTMOD | |
569 | ||
570 | ifeq ($(dot-config),1) | |
571 | # Read in config | |
572 | -include include/config/auto.conf | |
573 | ||
574 | ifeq ($(KBUILD_EXTMOD),) | |
575 | # Read in dependencies to all Kconfig* files, make sure to run | |
576 | # oldconfig if changes are detected. | |
577 | -include include/config/auto.conf.cmd | |
578 | ||
579 | # To avoid any implicit rule to kick in, define an empty command | |
580 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; | |
581 | ||
582 | # If .config is newer than include/config/auto.conf, someone tinkered | |
583 | # with it and forgot to run make oldconfig. | |
584 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so | |
585 | # we execute the config step to be sure to catch updated Kconfig files | |
586 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd | |
587 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig | |
588 | else | |
589 | # external modules needs include/generated/autoconf.h and include/config/auto.conf | |
590 | # but do not care if they are up-to-date. Use auto.conf to trigger the test | |
591 | PHONY += include/config/auto.conf | |
592 | ||
593 | include/config/auto.conf: | |
594 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ | |
595 | echo >&2; \ | |
596 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
597 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
598 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
599 | echo >&2 ; \ | |
600 | /bin/false) | |
601 | ||
602 | endif # KBUILD_EXTMOD | |
603 | ||
604 | else | |
605 | # Dummy target needed, because used as prerequisite | |
606 | include/config/auto.conf: ; | |
607 | endif # $(dot-config) | |
608 | ||
609 | # The all: target is the default when no target is given on the | |
610 | # command line. | |
611 | # This allow a user to issue only 'make' to build a kernel including modules | |
612 | # Defaults to vmlinux, but the arch makefile usually adds further targets | |
613 | all: vmlinux | |
614 | ||
615 | # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default | |
616 | # values of the respective KBUILD_* variables | |
617 | ARCH_CPPFLAGS := | |
618 | ARCH_AFLAGS := | |
619 | ARCH_CFLAGS := | |
620 | include arch/$(SRCARCH)/Makefile | |
621 | ||
622 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) | |
623 | KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) | |
624 | KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) | |
625 | ||
626 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
627 | KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) | |
628 | KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) | |
629 | endif | |
630 | ||
631 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
632 | KBUILD_CFLAGS += -Os | |
633 | else | |
634 | ifdef CONFIG_PROFILE_ALL_BRANCHES | |
635 | KBUILD_CFLAGS += -O2 | |
636 | else | |
637 | KBUILD_CFLAGS += -O2 | |
638 | endif | |
639 | endif | |
640 | ||
641 | # Tell gcc to never replace conditional load with a non-conditional one | |
642 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
643 | ||
644 | include scripts/Makefile.gcc-plugins | |
645 | ||
646 | ifdef CONFIG_READABLE_ASM | |
647 | # Disable optimizations that make assembler listings hard to read. | |
648 | # reorder blocks reorders the control in the function | |
649 | # ipa clone creates specialized cloned functions | |
650 | # partial inlining inlines only parts of functions | |
651 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
652 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
653 | $(call cc-option,-fno-partial-inlining) | |
654 | endif | |
655 | ||
656 | ifneq ($(CONFIG_FRAME_WARN),0) | |
657 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) | |
658 | endif | |
659 | ||
660 | # This selects the stack protector compiler flag. Testing it is delayed | |
661 | # until after .config has been reprocessed, in the prepare-compiler-check | |
662 | # target. | |
663 | ifdef CONFIG_CC_STACKPROTECTOR_REGULAR | |
664 | stackp-flag := -fstack-protector | |
665 | stackp-name := REGULAR | |
666 | else | |
667 | ifdef CONFIG_CC_STACKPROTECTOR_STRONG | |
668 | stackp-flag := -fstack-protector-strong | |
669 | stackp-name := STRONG | |
670 | else | |
671 | # Force off for distro compilers that enable stack protector by default. | |
672 | stackp-flag := $(call cc-option, -fno-stack-protector) | |
673 | endif | |
674 | endif | |
675 | # Find arch-specific stack protector compiler sanity-checking script. | |
676 | ifdef CONFIG_CC_STACKPROTECTOR | |
677 | stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh | |
678 | stackp-check := $(wildcard $(stackp-path)) | |
679 | endif | |
680 | KBUILD_CFLAGS += $(stackp-flag) | |
681 | ||
682 | ifeq ($(cc-name),clang) | |
683 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) | |
684 | KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) | |
685 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) | |
686 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) | |
687 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
688 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
689 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
690 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
691 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
692 | # See modpost pattern 2 | |
693 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
694 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) | |
695 | else | |
696 | ||
697 | # These warnings generated too much noise in a regular build. | |
698 | # Use make W=1 to enable them (see scripts/Makefile.build) | |
699 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) | |
700 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) | |
701 | endif | |
702 | ||
703 | ifdef CONFIG_FRAME_POINTER | |
704 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls | |
705 | else | |
706 | # Some targets (ARM with Thumb2, for example), can't be built with frame | |
707 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
708 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
709 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
710 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
711 | ifndef CONFIG_FUNCTION_TRACER | |
712 | KBUILD_CFLAGS += -fomit-frame-pointer | |
713 | endif | |
714 | endif | |
715 | ||
716 | KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) | |
717 | ||
718 | ifdef CONFIG_DEBUG_INFO | |
719 | ifdef CONFIG_DEBUG_INFO_SPLIT | |
720 | KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) | |
721 | else | |
722 | KBUILD_CFLAGS += -g | |
723 | endif | |
724 | KBUILD_AFLAGS += -Wa,-gdwarf-2 | |
725 | endif | |
726 | ifdef CONFIG_DEBUG_INFO_DWARF4 | |
727 | KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) | |
728 | endif | |
729 | ||
730 | ifdef CONFIG_DEBUG_INFO_REDUCED | |
731 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ | |
732 | $(call cc-option,-fno-var-tracking) | |
733 | endif | |
734 | ||
735 | ifdef CONFIG_FUNCTION_TRACER | |
736 | ifndef CC_FLAGS_FTRACE | |
737 | CC_FLAGS_FTRACE := -pg | |
738 | endif | |
739 | export CC_FLAGS_FTRACE | |
740 | ifdef CONFIG_HAVE_FENTRY | |
741 | CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) | |
742 | endif | |
743 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) | |
744 | KBUILD_AFLAGS += $(CC_USING_FENTRY) | |
745 | ifdef CONFIG_DYNAMIC_FTRACE | |
746 | ifdef CONFIG_HAVE_C_RECORDMCOUNT | |
747 | BUILD_C_RECORDMCOUNT := y | |
748 | export BUILD_C_RECORDMCOUNT | |
749 | endif | |
750 | endif | |
751 | endif | |
752 | ||
753 | # We trigger additional mismatches with less inlining | |
754 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
755 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
756 | endif | |
757 | ||
758 | # arch Makefile may override CC so keep this after arch Makefile is included | |
759 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) | |
760 | CHECKFLAGS += $(NOSTDINC_FLAGS) | |
761 | ||
762 | # warn about C99 declaration after statement | |
763 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | |
764 | ||
765 | # disable pointer signed / unsigned warnings in gcc 4.0 | |
766 | KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) | |
767 | ||
768 | # disable invalid "can't wrap" optimizations for signed / pointers | |
769 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) | |
770 | ||
771 | # conserve stack if available | |
772 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
773 | ||
774 | # disallow errors like 'EXPORT_GPL(foo);' with missing header | |
775 | KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) | |
776 | ||
777 | # require functions to have arguments in prototypes, not empty 'int foo()' | |
778 | KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) | |
779 | ||
780 | # Prohibit date/time macros, which would make the build non-deterministic | |
781 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
782 | ||
783 | # enforce correct pointer usage | |
784 | KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) | |
785 | ||
786 | # use the deterministic mode of AR if available | |
787 | KBUILD_ARFLAGS := $(call ar-option,D) | |
788 | ||
789 | # check for 'asm goto' | |
790 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) | |
791 | KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO | |
792 | KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO | |
793 | endif | |
794 | ||
795 | include scripts/Makefile.kasan | |
796 | include scripts/Makefile.extrawarn | |
797 | include scripts/Makefile.ubsan | |
798 | ||
799 | # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the | |
800 | # last assignments | |
801 | KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) | |
802 | KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) | |
803 | KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) | |
804 | ||
805 | # Use --build-id when available. | |
806 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ | |
807 | $(call cc-ldoption, -Wl$(comma)--build-id,)) | |
808 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) | |
809 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) | |
810 | ||
811 | ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
812 | LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) | |
813 | endif | |
814 | ||
815 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) | |
816 | LDFLAGS_vmlinux += $(call ld-option, -X,) | |
817 | endif | |
818 | ||
819 | # Default kernel image to build when no specific target is given. | |
820 | # KBUILD_IMAGE may be overruled on the command line or | |
821 | # set in the environment | |
822 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
823 | # this default value | |
824 | export KBUILD_IMAGE ?= vmlinux | |
825 | ||
826 | # | |
827 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
828 | # images. Default is /boot, but you can set it to other values | |
829 | export INSTALL_PATH ?= /boot | |
830 | ||
831 | # | |
832 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
833 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
834 | # an argument if needed. Otherwise it defaults to the kernel install path | |
835 | # | |
836 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
837 | ||
838 | # | |
839 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
840 | # relocations required by build roots. This is not defined in the | |
841 | # makefile but the argument can be passed to make if needed. | |
842 | # | |
843 | ||
844 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) | |
845 | export MODLIB | |
846 | ||
847 | # | |
848 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
849 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
850 | # the default option --strip-debug will be used. Otherwise, | |
851 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
852 | ||
853 | ifdef INSTALL_MOD_STRIP | |
854 | ifeq ($(INSTALL_MOD_STRIP),1) | |
855 | mod_strip_cmd = $(STRIP) --strip-debug | |
856 | else | |
857 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
858 | endif # INSTALL_MOD_STRIP=1 | |
859 | else | |
860 | mod_strip_cmd = true | |
861 | endif # INSTALL_MOD_STRIP | |
862 | export mod_strip_cmd | |
863 | ||
864 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed | |
865 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
866 | # or CONFIG_MODULE_COMPRESS_XZ. | |
867 | ||
868 | mod_compress_cmd = true | |
869 | ifdef CONFIG_MODULE_COMPRESS | |
870 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
871 | mod_compress_cmd = gzip -n -f | |
872 | endif # CONFIG_MODULE_COMPRESS_GZIP | |
873 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
874 | mod_compress_cmd = xz -f | |
875 | endif # CONFIG_MODULE_COMPRESS_XZ | |
876 | endif # CONFIG_MODULE_COMPRESS | |
877 | export mod_compress_cmd | |
878 | ||
879 | # Select initial ramdisk compression format, default is gzip(1). | |
880 | # This shall be used by the dracut(8) tool while creating an initramfs image. | |
881 | # | |
882 | INITRD_COMPRESS-y := gzip | |
883 | INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 | |
884 | INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma | |
885 | INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz | |
886 | INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo | |
887 | INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 | |
888 | # do not export INITRD_COMPRESS, since we didn't actually | |
889 | # choose a sane default compression above. | |
890 | # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) | |
891 | ||
892 | ifdef CONFIG_MODULE_SIG_ALL | |
893 | $(eval $(call config_filename,MODULE_SIG_KEY)) | |
894 | ||
895 | mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 | |
896 | else | |
897 | mod_sign_cmd = true | |
898 | endif | |
899 | export mod_sign_cmd | |
900 | ||
901 | ||
902 | ifeq ($(KBUILD_EXTMOD),) | |
903 | core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ | |
904 | ||
905 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
906 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
907 | $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) | |
908 | ||
909 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
910 | $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) | |
911 | ||
912 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
913 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
914 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
915 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
916 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
917 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
918 | libs-y := $(libs-y1) $(libs-y2) | |
919 | virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) | |
920 | ||
921 | # Externally visible symbols (used by link-vmlinux.sh) | |
922 | export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) | |
923 | export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y) | |
924 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
925 | export LDFLAGS_vmlinux | |
926 | # used by scripts/pacmage/Makefile | |
927 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) | |
928 | ||
929 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) | |
930 | ||
931 | # Include targets which we want to execute sequentially if the rest of the | |
932 | # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be | |
933 | # evaluated more than once. | |
934 | PHONY += vmlinux_prereq | |
935 | vmlinux_prereq: $(vmlinux-deps) FORCE | |
936 | ifdef CONFIG_HEADERS_CHECK | |
937 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check | |
938 | endif | |
939 | ifdef CONFIG_GDB_SCRIPTS | |
940 | $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py | |
941 | endif | |
942 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
943 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ | |
944 | "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq" | |
945 | endif | |
946 | ||
947 | # standalone target for easier testing | |
948 | include/generated/autoksyms.h: FORCE | |
949 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true | |
950 | ||
951 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) | |
952 | ||
953 | # Final link of vmlinux with optional arch pass after final link | |
954 | cmd_link-vmlinux = \ | |
955 | $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ | |
956 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) | |
957 | ||
958 | vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE | |
959 | +$(call if_changed,link-vmlinux) | |
960 | ||
961 | # Build samples along the rest of the kernel | |
962 | ifdef CONFIG_SAMPLES | |
963 | vmlinux-dirs += samples | |
964 | endif | |
965 | ||
966 | # The actual objects are generated when descending, | |
967 | # make sure no implicit rule kicks in | |
968 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; | |
969 | ||
970 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
971 | # Preset locale variables to speed up the build process. Limit locale | |
972 | # tweaks to this spot to avoid wrong language settings when running | |
973 | # make menuconfig etc. | |
974 | # Error messages still appears in the original language | |
975 | ||
976 | PHONY += $(vmlinux-dirs) | |
977 | $(vmlinux-dirs): prepare scripts | |
978 | $(Q)$(MAKE) $(build)=$@ | |
979 | ||
980 | define filechk_kernel.release | |
981 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
982 | endef | |
983 | ||
984 | # Store (new) KERNELRELEASE string in include/config/kernel.release | |
985 | include/config/kernel.release: include/config/auto.conf FORCE | |
986 | $(call filechk,kernel.release) | |
987 | ||
988 | ||
989 | # Things we need to do before we recursively start building the kernel | |
990 | # or the modules are listed in "prepare". | |
991 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
992 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
993 | # version.h and scripts_basic is processed / created. | |
994 | ||
995 | # Listed in dependency order | |
996 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 | |
997 | ||
998 | # prepare3 is used to check if we are building in a separate output directory, | |
999 | # and if so do: | |
1000 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
1001 | prepare3: include/config/kernel.release | |
1002 | ifneq ($(KBUILD_SRC),) | |
1003 | @$(kecho) ' Using $(srctree) as source for kernel' | |
1004 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ | |
1005 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ | |
1006 | echo >&2 " in the '$(srctree)' directory.";\ | |
1007 | /bin/false; \ | |
1008 | fi; | |
1009 | endif | |
1010 | ||
1011 | # prepare2 creates a makefile if using a separate output directory. | |
1012 | # From this point forward, .config has been reprocessed, so any rules | |
1013 | # that need to depend on updated CONFIG_* values can be checked here. | |
1014 | prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic | |
1015 | ||
1016 | prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ | |
1017 | include/config/auto.conf | |
1018 | $(cmd_crmodverdir) | |
1019 | $(Q)test -e include/generated/autoksyms.h || \ | |
1020 | touch include/generated/autoksyms.h | |
1021 | ||
1022 | archprepare: archheaders archscripts prepare1 scripts_basic | |
1023 | ||
1024 | prepare0: archprepare gcc-plugins | |
1025 | $(Q)$(MAKE) $(build)=. | |
1026 | ||
1027 | # All the preparing.. | |
1028 | prepare: prepare0 prepare-objtool | |
1029 | ||
1030 | ifdef CONFIG_STACK_VALIDATION | |
1031 | has_libelf := $(call try-run,\ | |
1032 | echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) | |
1033 | ifeq ($(has_libelf),1) | |
1034 | objtool_target := tools/objtool FORCE | |
1035 | else | |
1036 | $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") | |
1037 | SKIP_STACK_VALIDATION := 1 | |
1038 | export SKIP_STACK_VALIDATION | |
1039 | endif | |
1040 | endif | |
1041 | ||
1042 | PHONY += prepare-objtool | |
1043 | prepare-objtool: $(objtool_target) | |
1044 | ||
1045 | # Check for CONFIG flags that require compiler support. Abort the build | |
1046 | # after .config has been processed, but before the kernel build starts. | |
1047 | # | |
1048 | # For security-sensitive CONFIG options, we don't want to fallback and/or | |
1049 | # silently change which compiler flags will be used, since that leads to | |
1050 | # producing kernels with different security feature characteristics | |
1051 | # depending on the compiler used. (For example, "But I selected | |
1052 | # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") | |
1053 | PHONY += prepare-compiler-check | |
1054 | prepare-compiler-check: FORCE | |
1055 | # Make sure compiler supports requested stack protector flag. | |
1056 | ifdef stackp-name | |
1057 | ifeq ($(call cc-option, $(stackp-flag)),) | |
1058 | @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ | |
1059 | $(stackp-flag) not supported by compiler >&2 && exit 1 | |
1060 | endif | |
1061 | endif | |
1062 | # Make sure compiler does not have buggy stack-protector support. | |
1063 | ifdef stackp-check | |
1064 | ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) | |
1065 | @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ | |
1066 | $(stackp-flag) available but compiler is broken >&2 && exit 1 | |
1067 | endif | |
1068 | endif | |
1069 | @: | |
1070 | ||
1071 | # Generate some files | |
1072 | # --------------------------------------------------------------------------- | |
1073 | ||
1074 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1075 | # needs to be updated, so this check is forced on all builds | |
1076 | ||
1077 | uts_len := 64 | |
1078 | define filechk_utsrelease.h | |
1079 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1080 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1081 | exit 1; \ | |
1082 | fi; \ | |
1083 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
1084 | endef | |
1085 | ||
1086 | define filechk_version.h | |
1087 | (echo \#define LINUX_VERSION_CODE $(shell \ | |
1088 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
1089 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) | |
1090 | endef | |
1091 | ||
1092 | $(version_h): $(srctree)/Makefile FORCE | |
1093 | $(call filechk,version.h) | |
1094 | $(Q)rm -f $(old_version_h) | |
1095 | ||
1096 | include/generated/utsrelease.h: include/config/kernel.release FORCE | |
1097 | $(call filechk,utsrelease.h) | |
1098 | ||
1099 | PHONY += headerdep | |
1100 | headerdep: | |
1101 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ | |
1102 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
1103 | ||
1104 | # --------------------------------------------------------------------------- | |
1105 | # Firmware install | |
1106 | INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware | |
1107 | export INSTALL_FW_PATH | |
1108 | ||
1109 | PHONY += firmware_install | |
1110 | firmware_install: | |
1111 | @mkdir -p $(objtree)/firmware | |
1112 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install | |
1113 | ||
1114 | # --------------------------------------------------------------------------- | |
1115 | # Kernel headers | |
1116 | ||
1117 | #Default location for installed headers | |
1118 | export INSTALL_HDR_PATH = $(objtree)/usr | |
1119 | ||
1120 | # If we do an all arch process set dst to asm-$(hdr-arch) | |
1121 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) | |
1122 | ||
1123 | PHONY += archheaders | |
1124 | archheaders: | |
1125 | ||
1126 | PHONY += archscripts | |
1127 | archscripts: | |
1128 | ||
1129 | PHONY += __headers | |
1130 | __headers: $(version_h) scripts_basic asm-generic archheaders archscripts | |
1131 | $(Q)$(MAKE) $(build)=scripts build_unifdef | |
1132 | ||
1133 | PHONY += headers_install_all | |
1134 | headers_install_all: | |
1135 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
1136 | ||
1137 | PHONY += headers_install | |
1138 | headers_install: __headers | |
1139 | $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ | |
1140 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
1141 | $(Q)$(MAKE) $(hdr-inst)=include/uapi | |
1142 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) | |
1143 | ||
1144 | PHONY += headers_check_all | |
1145 | headers_check_all: headers_install_all | |
1146 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check | |
1147 | ||
1148 | PHONY += headers_check | |
1149 | headers_check: headers_install | |
1150 | $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 | |
1151 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 | |
1152 | ||
1153 | # --------------------------------------------------------------------------- | |
1154 | # Kernel selftest | |
1155 | ||
1156 | PHONY += kselftest | |
1157 | kselftest: | |
1158 | $(Q)$(MAKE) -C tools/testing/selftests run_tests | |
1159 | ||
1160 | kselftest-clean: | |
1161 | $(Q)$(MAKE) -C tools/testing/selftests clean | |
1162 | ||
1163 | PHONY += kselftest-merge | |
1164 | kselftest-merge: | |
1165 | $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) | |
1166 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ | |
1167 | -m $(objtree)/.config \ | |
1168 | $(srctree)/tools/testing/selftests/*/config | |
1169 | +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig | |
1170 | ||
1171 | # --------------------------------------------------------------------------- | |
1172 | # Modules | |
1173 | ||
1174 | ifdef CONFIG_MODULES | |
1175 | ||
1176 | # By default, build modules as well | |
1177 | ||
1178 | all: modules | |
1179 | ||
1180 | # Build modules | |
1181 | # | |
1182 | # A module can be listed more than once in obj-m resulting in | |
1183 | # duplicate lines in modules.order files. Those are removed | |
1184 | # using awk while concatenating to the final file. | |
1185 | ||
1186 | PHONY += modules | |
1187 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin | |
1188 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order | |
1189 | @$(kecho) ' Building modules, stage 2.'; | |
1190 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1191 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild | |
1192 | ||
1193 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) | |
1194 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1195 | ||
1196 | %/modules.builtin: include/config/auto.conf | |
1197 | $(Q)$(MAKE) $(modbuiltin)=$* | |
1198 | ||
1199 | ||
1200 | # Target to prepare building external modules | |
1201 | PHONY += modules_prepare | |
1202 | modules_prepare: prepare scripts | |
1203 | ||
1204 | # Target to install modules | |
1205 | PHONY += modules_install | |
1206 | modules_install: _modinst_ _modinst_post | |
1207 | ||
1208 | PHONY += _modinst_ | |
1209 | _modinst_: | |
1210 | @rm -rf $(MODLIB)/kernel | |
1211 | @rm -f $(MODLIB)/source | |
1212 | @mkdir -p $(MODLIB)/kernel | |
1213 | @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source | |
1214 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1215 | rm -f $(MODLIB)/build ; \ | |
1216 | ln -s $(CURDIR) $(MODLIB)/build ; \ | |
1217 | fi | |
1218 | @cp -f $(objtree)/modules.order $(MODLIB)/ | |
1219 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ | |
1220 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1221 | ||
1222 | # This depmod is only for convenience to give the initial | |
1223 | # boot a modules.dep even before / is mounted read-write. However the | |
1224 | # boot script depmod is the master version. | |
1225 | PHONY += _modinst_post | |
1226 | _modinst_post: _modinst_ | |
1227 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst | |
1228 | $(call cmd,depmod) | |
1229 | ||
1230 | ifeq ($(CONFIG_MODULE_SIG), y) | |
1231 | PHONY += modules_sign | |
1232 | modules_sign: | |
1233 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1234 | endif | |
1235 | ||
1236 | else # CONFIG_MODULES | |
1237 | ||
1238 | # Modules not configured | |
1239 | # --------------------------------------------------------------------------- | |
1240 | ||
1241 | PHONY += modules modules_install | |
1242 | modules modules_install: | |
1243 | @echo >&2 | |
1244 | @echo >&2 "The present kernel configuration has modules disabled." | |
1245 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1246 | @echo >&2 "Then build a kernel with module support enabled." | |
1247 | @echo >&2 | |
1248 | @exit 1 | |
1249 | ||
1250 | endif # CONFIG_MODULES | |
1251 | ||
1252 | ### | |
1253 | # Cleaning is done on three levels. | |
1254 | # make clean Delete most generated files | |
1255 | # Leave enough to build external modules | |
1256 | # make mrproper Delete the current configuration, and all generated files | |
1257 | # make distclean Remove editor backup files, patch leftover files and the like | |
1258 | ||
1259 | # Directories & files removed with 'make clean' | |
1260 | CLEAN_DIRS += $(MODVERDIR) | |
1261 | ||
1262 | # Directories & files removed with 'make mrproper' | |
1263 | MRPROPER_DIRS += include/config usr/include include/generated \ | |
1264 | arch/*/include/generated .tmp_objdiff | |
1265 | MRPROPER_FILES += .config .config.old .version .old_version \ | |
1266 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ | |
1267 | signing_key.pem signing_key.priv signing_key.x509 \ | |
1268 | x509.genkey extra_certificates signing_key.x509.keyid \ | |
1269 | signing_key.x509.signer vmlinux-gdb.py | |
1270 | ||
1271 | # clean - Delete most, but leave enough to build external modules | |
1272 | # | |
1273 | clean: rm-dirs := $(CLEAN_DIRS) | |
1274 | clean: rm-files := $(CLEAN_FILES) | |
1275 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) | |
1276 | ||
1277 | PHONY += $(clean-dirs) clean archclean vmlinuxclean | |
1278 | $(clean-dirs): | |
1279 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1280 | ||
1281 | vmlinuxclean: | |
1282 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1283 | $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) | |
1284 | ||
1285 | clean: archclean vmlinuxclean | |
1286 | ||
1287 | # mrproper - Delete all generated files, including .config | |
1288 | # | |
1289 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1290 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1291 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1292 | ||
1293 | PHONY += $(mrproper-dirs) mrproper archmrproper | |
1294 | $(mrproper-dirs): | |
1295 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1296 | ||
1297 | mrproper: clean archmrproper $(mrproper-dirs) | |
1298 | $(call cmd,rmdirs) | |
1299 | $(call cmd,rmfiles) | |
1300 | ||
1301 | # distclean | |
1302 | # | |
1303 | PHONY += distclean | |
1304 | ||
1305 | distclean: mrproper | |
1306 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
1307 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1308 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | |
1309 | -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ | |
1310 | -type f -print | xargs rm -f | |
1311 | ||
1312 | ||
1313 | # Packaging of the kernel to various formats | |
1314 | # --------------------------------------------------------------------------- | |
1315 | # rpm target kept for backward compatibility | |
1316 | package-dir := scripts/package | |
1317 | ||
1318 | %src-pkg: FORCE | |
1319 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1320 | %pkg: include/config/kernel.release FORCE | |
1321 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1322 | rpm: include/config/kernel.release FORCE | |
1323 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
1324 | ||
1325 | ||
1326 | # Brief documentation of the typical targets used | |
1327 | # --------------------------------------------------------------------------- | |
1328 | ||
1329 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) | |
1330 | boards := $(sort $(notdir $(boards))) | |
1331 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) | |
1332 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1333 | ||
1334 | PHONY += help | |
1335 | help: | |
1336 | @echo 'Cleaning targets:' | |
1337 | @echo ' clean - Remove most generated files but keep the config and' | |
1338 | @echo ' enough build support to build external modules' | |
1339 | @echo ' mrproper - Remove all generated files + config + various backup files' | |
1340 | @echo ' distclean - mrproper + remove editor backup and patch files' | |
1341 | @echo '' | |
1342 | @echo 'Configuration targets:' | |
1343 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1344 | @echo '' | |
1345 | @echo 'Other generic targets:' | |
1346 | @echo ' all - Build all targets marked with [*]' | |
1347 | @echo '* vmlinux - Build the bare kernel' | |
1348 | @echo '* modules - Build all modules' | |
1349 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' | |
1350 | @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' | |
1351 | @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' | |
1352 | @echo ' dir/ - Build all files in dir and below' | |
1353 | @echo ' dir/file.[ois] - Build specified target only' | |
1354 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1355 | @echo ' (requires a recent binutils and recent build (System.map))' | |
1356 | @echo ' dir/file.ko - Build module including final link' | |
1357 | @echo ' modules_prepare - Set up for building external modules' | |
1358 | @echo ' tags/TAGS - Generate tags file for editors' | |
1359 | @echo ' cscope - Generate cscope index' | |
1360 | @echo ' gtags - Generate GNU GLOBAL index' | |
1361 | @echo ' kernelrelease - Output the release version string (use with make -s)' | |
1362 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1363 | @echo ' image_name - Output the image name (use with make -s)' | |
1364 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ | |
1365 | echo ' (default: $(INSTALL_HDR_PATH))'; \ | |
1366 | echo '' | |
1367 | @echo 'Static analysers' | |
1368 | @echo ' checkstack - Generate a list of stack hogs' | |
1369 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1370 | @echo ' versioncheck - Sanity check on version.h usage' | |
1371 | @echo ' includecheck - Check for duplicate included header files' | |
1372 | @echo ' export_report - List the usages of all exported symbols' | |
1373 | @echo ' headers_check - Sanity check on exported headers' | |
1374 | @echo ' headerdep - Detect inclusion cycles in headers' | |
1375 | @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help | |
1376 | @echo '' | |
1377 | @echo 'Kernel selftest' | |
1378 | @echo ' kselftest - Build and run kernel selftest (run as root)' | |
1379 | @echo ' Build, install, and boot kernel before' | |
1380 | @echo ' running kselftest on it' | |
1381 | @echo ' kselftest-clean - Remove all generated kselftest files' | |
1382 | @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' | |
1383 | @echo ' .config.' | |
1384 | @echo '' | |
1385 | @echo 'Kernel packaging:' | |
1386 | @$(MAKE) $(build)=$(package-dir) help | |
1387 | @echo '' | |
1388 | @echo 'Documentation targets:' | |
1389 | @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp | |
1390 | @echo '' | |
1391 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1392 | @echo '' | |
1393 | @echo 'Architecture specific targets ($(SRCARCH)):' | |
1394 | @$(if $(archhelp),$(archhelp),\ | |
1395 | echo ' No architecture specific help defined for $(SRCARCH)') | |
1396 | @echo '' | |
1397 | @$(if $(boards), \ | |
1398 | $(foreach b, $(boards), \ | |
1399 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1400 | echo '') | |
1401 | @$(if $(board-dirs), \ | |
1402 | $(foreach b, $(board-dirs), \ | |
1403 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1404 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1405 | echo '') | |
1406 | ||
1407 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1408 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' | |
1409 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1410 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' | |
1411 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1412 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' | |
1413 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' | |
1414 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1415 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1416 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
1417 | @echo ' Multiple levels can be combined with W=12 or W=123' | |
1418 | @echo '' | |
1419 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1420 | @echo 'For further info see the ./README file' | |
1421 | ||
1422 | ||
1423 | help-board-dirs := $(addprefix help-,$(board-dirs)) | |
1424 | ||
1425 | help-boards: $(help-board-dirs) | |
1426 | ||
1427 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) | |
1428 | ||
1429 | $(help-board-dirs): help-%: | |
1430 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1431 | @$(if $(boards-per-dir), \ | |
1432 | $(foreach b, $(boards-per-dir), \ | |
1433 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1434 | echo '') | |
1435 | ||
1436 | ||
1437 | # Documentation targets | |
1438 | # --------------------------------------------------------------------------- | |
1439 | DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs | |
1440 | PHONY += $(DOC_TARGETS) | |
1441 | $(DOC_TARGETS): scripts_basic FORCE | |
1442 | $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype | |
1443 | $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ | |
1444 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | |
1445 | ||
1446 | else # KBUILD_EXTMOD | |
1447 | ||
1448 | ### | |
1449 | # External module support. | |
1450 | # When building external modules the kernel used as basis is considered | |
1451 | # read-only, and no consistency checks are made and the make | |
1452 | # system is not used on the basis kernel. If updates are required | |
1453 | # in the basis kernel ordinary make commands (without M=...) must | |
1454 | # be used. | |
1455 | # | |
1456 | # The following are the only valid targets when building external | |
1457 | # modules. | |
1458 | # make M=dir clean Delete all automatically generated files | |
1459 | # make M=dir modules Make all modules in specified dir | |
1460 | # make M=dir Same as 'make M=dir modules' | |
1461 | # make M=dir modules_install | |
1462 | # Install the modules built in the module directory | |
1463 | # Assumes install directory is already created | |
1464 | ||
1465 | # We are always building modules | |
1466 | KBUILD_MODULES := 1 | |
1467 | PHONY += crmodverdir | |
1468 | crmodverdir: | |
1469 | $(cmd_crmodverdir) | |
1470 | ||
1471 | PHONY += $(objtree)/Module.symvers | |
1472 | $(objtree)/Module.symvers: | |
1473 | @test -e $(objtree)/Module.symvers || ( \ | |
1474 | echo; \ | |
1475 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1476 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1477 | echo ) | |
1478 | ||
1479 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
1480 | PHONY += $(module-dirs) modules | |
1481 | $(module-dirs): crmodverdir $(objtree)/Module.symvers | |
1482 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1483 | ||
1484 | modules: $(module-dirs) | |
1485 | @$(kecho) ' Building modules, stage 2.'; | |
1486 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1487 | ||
1488 | PHONY += modules_install | |
1489 | modules_install: _emodinst_ _emodinst_post | |
1490 | ||
1491 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) | |
1492 | PHONY += _emodinst_ | |
1493 | _emodinst_: | |
1494 | $(Q)mkdir -p $(MODLIB)/$(install-dir) | |
1495 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst | |
1496 | ||
1497 | PHONY += _emodinst_post | |
1498 | _emodinst_post: _emodinst_ | |
1499 | $(call cmd,depmod) | |
1500 | ||
1501 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | |
1502 | ||
1503 | PHONY += $(clean-dirs) clean | |
1504 | $(clean-dirs): | |
1505 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1506 | ||
1507 | clean: rm-dirs := $(MODVERDIR) | |
1508 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers | |
1509 | ||
1510 | PHONY += help | |
1511 | help: | |
1512 | @echo ' Building external modules.' | |
1513 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1514 | @echo '' | |
1515 | @echo ' modules - default target, build the module(s)' | |
1516 | @echo ' modules_install - install the module' | |
1517 | @echo ' clean - remove generated files in module directory only' | |
1518 | @echo '' | |
1519 | ||
1520 | # Dummies... | |
1521 | PHONY += prepare scripts | |
1522 | prepare: ; | |
1523 | scripts: ; | |
1524 | endif # KBUILD_EXTMOD | |
1525 | ||
1526 | clean: $(clean-dirs) | |
1527 | $(call cmd,rmdirs) | |
1528 | $(call cmd,rmfiles) | |
1529 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ | |
1530 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1531 | -o -name '*.ko.*' \ | |
1532 | -o -name '*.dwo' \ | |
1533 | -o -name '*.su' \ | |
1534 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ | |
1535 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1536 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
1537 | -o -name '*.c.[012]*.*' \ | |
1538 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1539 | ||
1540 | # Generate tags for editors | |
1541 | # --------------------------------------------------------------------------- | |
1542 | quiet_cmd_tags = GEN $@ | |
1543 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1544 | ||
1545 | tags TAGS cscope gtags: FORCE | |
1546 | $(call cmd,tags) | |
1547 | ||
1548 | # Scripts to check various things for consistency | |
1549 | # --------------------------------------------------------------------------- | |
1550 | ||
1551 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report | |
1552 | ||
1553 | includecheck: | |
1554 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1555 | -name '*.[hcS]' -type f -print | sort \ | |
1556 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl | |
1557 | ||
1558 | versioncheck: | |
1559 | find $(srctree)/* $(RCS_FIND_IGNORE) \ | |
1560 | -name '*.[hcS]' -type f -print | sort \ | |
1561 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl | |
1562 | ||
1563 | coccicheck: | |
1564 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1565 | ||
1566 | namespacecheck: | |
1567 | $(PERL) $(srctree)/scripts/namespace.pl | |
1568 | ||
1569 | export_report: | |
1570 | $(PERL) $(srctree)/scripts/export_report.pl | |
1571 | ||
1572 | endif #ifeq ($(config-targets),1) | |
1573 | endif #ifeq ($(mixed-targets),1) | |
1574 | ||
1575 | PHONY += checkstack kernelrelease kernelversion image_name | |
1576 | ||
1577 | # UML needs a little special treatment here. It wants to use the host | |
1578 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1579 | # else wants $(ARCH), including people doing cross-builds, which means | |
1580 | # that $(SUBARCH) doesn't work here. | |
1581 | ifeq ($(ARCH), um) | |
1582 | CHECKSTACK_ARCH := $(SUBARCH) | |
1583 | else | |
1584 | CHECKSTACK_ARCH := $(ARCH) | |
1585 | endif | |
1586 | checkstack: | |
1587 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1588 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) | |
1589 | ||
1590 | kernelrelease: | |
1591 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
1592 | ||
1593 | kernelversion: | |
1594 | @echo $(KERNELVERSION) | |
1595 | ||
1596 | image_name: | |
1597 | @echo $(KBUILD_IMAGE) | |
1598 | ||
1599 | # Clear a bunch of variables before executing the submake | |
1600 | tools/: FORCE | |
1601 | $(Q)mkdir -p $(objtree)/tools | |
1602 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ | |
1603 | ||
1604 | tools/%: FORCE | |
1605 | $(Q)mkdir -p $(objtree)/tools | |
1606 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* | |
1607 | ||
1608 | # Single targets | |
1609 | # --------------------------------------------------------------------------- | |
1610 | # Single targets are compatible with: | |
1611 | # - build with mixed source and output | |
1612 | # - build with separate output dir 'make O=...' | |
1613 | # - external modules | |
1614 | # | |
1615 | # target-dir => where to store outputfile | |
1616 | # build-dir => directory in kernel source tree to use | |
1617 | ||
1618 | ifeq ($(KBUILD_EXTMOD),) | |
1619 | build-dir = $(patsubst %/,%,$(dir $@)) | |
1620 | target-dir = $(dir $@) | |
1621 | else | |
1622 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1623 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1624 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1625 | endif | |
1626 | ||
1627 | %.s: %.c prepare scripts FORCE | |
1628 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1629 | %.i: %.c prepare scripts FORCE | |
1630 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1631 | %.o: %.c prepare scripts FORCE | |
1632 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1633 | %.lst: %.c prepare scripts FORCE | |
1634 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1635 | %.s: %.S prepare scripts FORCE | |
1636 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1637 | %.o: %.S prepare scripts FORCE | |
1638 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1639 | %.symtypes: %.c prepare scripts FORCE | |
1640 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
1641 | ||
1642 | # Modules | |
1643 | /: prepare scripts FORCE | |
1644 | $(cmd_crmodverdir) | |
1645 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1646 | $(build)=$(build-dir) | |
1647 | # Make sure the latest headers are built for Documentation | |
1648 | Documentation/ samples/: headers_install | |
1649 | %/: prepare scripts FORCE | |
1650 | $(cmd_crmodverdir) | |
1651 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1652 | $(build)=$(build-dir) | |
1653 | %.ko: prepare scripts FORCE | |
1654 | $(cmd_crmodverdir) | |
1655 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1656 | $(build)=$(build-dir) $(@:.ko=.o) | |
1657 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
1658 | ||
1659 | # FIXME Should go into a make.lib or something | |
1660 | # =========================================================================== | |
1661 | ||
1662 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1663 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1664 | ||
1665 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1666 | cmd_rmfiles = rm -f $(rm-files) | |
1667 | ||
1668 | # Run depmod only if we have System.map and depmod is executable | |
1669 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1670 | cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ | |
1671 | $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" | |
1672 | ||
1673 | # Create temporary dir for module support files | |
1674 | # clean it up only when building all modules | |
1675 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1676 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1677 | ||
1678 | # read all saved command lines | |
1679 | ||
1680 | targets := $(wildcard $(sort $(targets))) | |
1681 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1682 | ||
1683 | ifneq ($(cmd_files),) | |
1684 | $(cmd_files): ; # Do not try to update included dependency files | |
1685 | include $(cmd_files) | |
1686 | endif | |
1687 | ||
1688 | endif # skip-makefile | |
1689 | ||
1690 | PHONY += FORCE | |
1691 | FORCE: | |
1692 | ||
1693 | # Declare the contents of the .PHONY variable as phony. We keep that | |
1694 | # information in a variable so we can use it in if_changed and friends. | |
1695 | .PHONY: $(PHONY) |