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