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Commit | Line | Data |
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1da177e4 LT |
1 | VERSION = 2 |
2 | PATCHLEVEL = 6 | |
120bda20 | 3 | SUBLEVEL = 18 |
9f737633 | 4 | EXTRAVERSION = -rc4 |
1def630a | 5 | NAME=Crazed Snow-Weasel |
1da177e4 LT |
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 | # Do not print "Entering directory ..." | |
14 | MAKEFLAGS += --no-print-directory | |
15 | ||
16 | # We are using a recursive build, so we need to do a little thinking | |
17 | # to get the ordering right. | |
18 | # | |
19 | # Most importantly: sub-Makefiles should only ever modify files in | |
20 | # their own directory. If in some directory we have a dependency on | |
21 | # a file in another dir (which doesn't happen often, but it's often | |
22 | # unavoidable when linking the built-in.o targets which finally | |
23 | # turn into vmlinux), we will call a sub make in that other dir, and | |
24 | # after that we are sure that everything which is in that other dir | |
25 | # is now up to date. | |
26 | # | |
27 | # The only cases where we need to modify files which have global | |
28 | # effects are thus separated out and done before the recursive | |
29 | # descending is started. They are now explicitly listed as the | |
30 | # prepare rule. | |
31 | ||
32 | # To put more focus on warnings, be less verbose as default | |
33 | # Use 'make V=1' to see the full commands | |
34 | ||
35 | ifdef V | |
36 | ifeq ("$(origin V)", "command line") | |
37 | KBUILD_VERBOSE = $(V) | |
38 | endif | |
39 | endif | |
40 | ifndef KBUILD_VERBOSE | |
41 | KBUILD_VERBOSE = 0 | |
42 | endif | |
43 | ||
701842e3 DK |
44 | # Call checker as part of compilation of C files |
45 | # Use 'make C=1' to enable checking (sparse, by default) | |
46 | # Override with 'make C=1 CHECK=checker_executable CHECKFLAGS=....' | |
1da177e4 LT |
47 | |
48 | ifdef C | |
49 | ifeq ("$(origin C)", "command line") | |
50 | KBUILD_CHECKSRC = $(C) | |
51 | endif | |
52 | endif | |
53 | ifndef KBUILD_CHECKSRC | |
54 | KBUILD_CHECKSRC = 0 | |
55 | endif | |
56 | ||
57 | # Use make M=dir to specify directory of external module to build | |
58 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
59 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
60 | ifdef SUBDIRS | |
61 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
62 | endif | |
63 | ifdef M | |
64 | ifeq ("$(origin M)", "command line") | |
65 | KBUILD_EXTMOD := $(M) | |
66 | endif | |
67 | endif | |
68 | ||
69 | ||
70 | # kbuild supports saving output files in a separate directory. | |
71 | # To locate output files in a separate directory two syntaxes are supported. | |
72 | # In both cases the working directory must be the root of the kernel src. | |
73 | # 1) O= | |
74 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 75 | # |
1da177e4 LT |
76 | # 2) Set KBUILD_OUTPUT |
77 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
78 | # where the output files shall be placed. | |
79 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
80 | # make | |
81 | # | |
82 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
83 | # variable. | |
84 | ||
85 | ||
86 | # KBUILD_SRC is set on invocation of make in OBJ directory | |
87 | # KBUILD_SRC is not intended to be used by the regular user (for now) | |
88 | ifeq ($(KBUILD_SRC),) | |
89 | ||
90 | # OK, Make called in directory where kernel src resides | |
91 | # Do we want to locate output files in a separate directory? | |
92 | ifdef O | |
93 | ifeq ("$(origin O)", "command line") | |
94 | KBUILD_OUTPUT := $(O) | |
95 | endif | |
96 | endif | |
97 | ||
98 | # That's our default target when none is given on the command line | |
4f193362 | 99 | PHONY := _all |
1da177e4 LT |
100 | _all: |
101 | ||
102 | ifneq ($(KBUILD_OUTPUT),) | |
103 | # Invoke a second make in the output directory, passing relevant variables | |
104 | # check that the output directory actually exists | |
105 | saved-output := $(KBUILD_OUTPUT) | |
106 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) | |
107 | $(if $(KBUILD_OUTPUT),, \ | |
108 | $(error output directory "$(saved-output)" does not exist)) | |
109 | ||
4f193362 | 110 | PHONY += $(MAKECMDGOALS) |
1da177e4 | 111 | |
36cbbe5e | 112 | $(filter-out _all,$(MAKECMDGOALS)) _all: |
23a45e2c SR |
113 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ |
114 | KBUILD_SRC=$(CURDIR) \ | |
36cbbe5e | 115 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ |
1da177e4 LT |
116 | |
117 | # Leave processing to above invocation of make | |
118 | skip-makefile := 1 | |
119 | endif # ifneq ($(KBUILD_OUTPUT),) | |
120 | endif # ifeq ($(KBUILD_SRC),) | |
121 | ||
122 | # We process the rest of the Makefile if this is the final invocation of make | |
123 | ifeq ($(skip-makefile),) | |
124 | ||
125 | # If building an external module we do not care about the all: rule | |
126 | # but instead _all depend on modules | |
4f193362 | 127 | PHONY += all |
1da177e4 LT |
128 | ifeq ($(KBUILD_EXTMOD),) |
129 | _all: all | |
130 | else | |
131 | _all: modules | |
132 | endif | |
133 | ||
134 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) | |
135 | TOPDIR := $(srctree) | |
136 | # FIXME - TOPDIR is obsolete, use srctree/objtree | |
137 | objtree := $(CURDIR) | |
138 | src := $(srctree) | |
139 | obj := $(objtree) | |
140 | ||
0f558c33 | 141 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
1da177e4 LT |
142 | |
143 | export srctree objtree VPATH TOPDIR | |
144 | ||
1da177e4 LT |
145 | |
146 | # SUBARCH tells the usermode build what the underlying arch is. That is set | |
147 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
148 | # line overrides the setting of ARCH below. If a native build is happening, | |
149 | # then ARCH is assigned, getting whatever value it gets normally, and | |
150 | # SUBARCH is subsequently ignored. | |
151 | ||
152 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ | |
153 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | |
39990b5e | 154 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
8999257c | 155 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) |
1da177e4 LT |
156 | |
157 | # Cross compiling and selecting different set of gcc/bin-utils | |
158 | # --------------------------------------------------------------------------- | |
159 | # | |
160 | # When performing cross compilation for other architectures ARCH shall be set | |
161 | # to the target architecture. (See arch/* for the possibilities). | |
162 | # ARCH can be set during invocation of make: | |
163 | # make ARCH=ia64 | |
164 | # Another way is to have ARCH set in the environment. | |
165 | # The default ARCH is the host where make is executed. | |
166 | ||
167 | # CROSS_COMPILE specify the prefix used for all executables used | |
168 | # during compilation. Only gcc and related bin-utils executables | |
169 | # are prefixed with $(CROSS_COMPILE). | |
170 | # CROSS_COMPILE can be set on the command line | |
171 | # make CROSS_COMPILE=ia64-linux- | |
172 | # Alternatively CROSS_COMPILE can be set in the environment. | |
173 | # Default value for CROSS_COMPILE is not to prefix executables | |
174 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
175 | ||
176 | ARCH ?= $(SUBARCH) | |
177 | CROSS_COMPILE ?= | |
178 | ||
179 | # Architecture as present in compile.h | |
180 | UTS_MACHINE := $(ARCH) | |
181 | ||
14cdd3c4 RZ |
182 | KCONFIG_CONFIG ?= .config |
183 | ||
1da177e4 LT |
184 | # SHELL used by kbuild |
185 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
186 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
187 | else echo sh; fi ; fi) | |
188 | ||
070b98bf SR |
189 | HOSTCC = gcc |
190 | HOSTCXX = g++ | |
191 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | |
192 | HOSTCXXFLAGS = -O2 | |
1da177e4 | 193 | |
070b98bf SR |
194 | # Decide whether to build built-in, modular, or both. |
195 | # Normally, just do built-in. | |
1da177e4 LT |
196 | |
197 | KBUILD_MODULES := | |
198 | KBUILD_BUILTIN := 1 | |
199 | ||
200 | # If we have only "make modules", don't compile built-in objects. | |
201 | # When we're building modules with modversions, we need to consider | |
202 | # the built-in objects during the descend as well, in order to | |
070b98bf | 203 | # make sure the checksums are up to date before we record them. |
1da177e4 LT |
204 | |
205 | ifeq ($(MAKECMDGOALS),modules) | |
206 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
207 | endif | |
208 | ||
209 | # If we have "make <whatever> modules", compile modules | |
210 | # in addition to whatever we do anyway. | |
211 | # Just "make" or "make all" shall build modules as well | |
212 | ||
213 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
214 | KBUILD_MODULES := 1 | |
215 | endif | |
216 | ||
217 | ifeq ($(MAKECMDGOALS),) | |
218 | KBUILD_MODULES := 1 | |
219 | endif | |
220 | ||
e579d351 | 221 | export KBUILD_MODULES KBUILD_BUILTIN |
1da177e4 LT |
222 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
223 | ||
224 | # Beautify output | |
225 | # --------------------------------------------------------------------------- | |
226 | # | |
227 | # Normally, we echo the whole command before executing it. By making | |
228 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
229 | # $(quiet) to choose other forms of output instead, e.g. | |
230 | # | |
231 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
232 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
233 | # | |
234 | # If $(quiet) is empty, the whole command will be printed. | |
235 | # If it is set to "quiet_", only the short version will be printed. | |
070b98bf | 236 | # If it is set to "silent_", nothing will be printed at all, since |
1da177e4 LT |
237 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
238 | # | |
a58a414f | 239 | # A simple variant is to prefix commands with $(Q) - that's useful |
1da177e4 LT |
240 | # for commands that shall be hidden in non-verbose mode. |
241 | # | |
242 | # $(Q)ln $@ :< | |
243 | # | |
244 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
245 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
246 | ||
247 | ifeq ($(KBUILD_VERBOSE),1) | |
248 | quiet = | |
249 | Q = | |
250 | else | |
251 | quiet=quiet_ | |
252 | Q = @ | |
253 | endif | |
254 | ||
255 | # If the user is running make -s (silent mode), suppress echoing of | |
256 | # commands | |
257 | ||
258 | ifneq ($(findstring s,$(MAKEFLAGS)),) | |
259 | quiet=silent_ | |
260 | endif | |
261 | ||
262 | export quiet Q KBUILD_VERBOSE | |
263 | ||
1da177e4 LT |
264 | |
265 | # Look for make include files relative to root of kernel src | |
266 | MAKEFLAGS += --include-dir=$(srctree) | |
267 | ||
8ec4b4ff | 268 | # We need some generic definitions |
2a691470 | 269 | include $(srctree)/scripts/Kbuild.include |
8ec4b4ff | 270 | |
566f81ca | 271 | # Do not use make's built-in rules and variables |
070b98bf | 272 | # This increases performance and avoid hard-to-debug behavour |
566f81ca | 273 | MAKEFLAGS += -rR |
1da177e4 LT |
274 | |
275 | # Make variables (CC, etc...) | |
276 | ||
277 | AS = $(CROSS_COMPILE)as | |
278 | LD = $(CROSS_COMPILE)ld | |
279 | CC = $(CROSS_COMPILE)gcc | |
280 | CPP = $(CC) -E | |
281 | AR = $(CROSS_COMPILE)ar | |
282 | NM = $(CROSS_COMPILE)nm | |
283 | STRIP = $(CROSS_COMPILE)strip | |
284 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
285 | OBJDUMP = $(CROSS_COMPILE)objdump | |
286 | AWK = awk | |
287 | GENKSYMS = scripts/genksyms/genksyms | |
288 | DEPMOD = /sbin/depmod | |
289 | KALLSYMS = scripts/kallsyms | |
290 | PERL = perl | |
291 | CHECK = sparse | |
292 | ||
af4ca457 | 293 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
1da177e4 LT |
294 | MODFLAGS = -DMODULE |
295 | CFLAGS_MODULE = $(MODFLAGS) | |
296 | AFLAGS_MODULE = $(MODFLAGS) | |
297 | LDFLAGS_MODULE = -r | |
298 | CFLAGS_KERNEL = | |
299 | AFLAGS_KERNEL = | |
300 | ||
301 | ||
302 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
303 | # Needed to be compatible with the O= option | |
304 | LINUXINCLUDE := -Iinclude \ | |
2dd34b48 | 305 | $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ |
e623a3b8 | 306 | -include include/linux/autoconf.h |
1da177e4 LT |
307 | |
308 | CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) | |
309 | ||
070b98bf SR |
310 | CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
311 | -fno-strict-aliasing -fno-common | |
34c162f7 | 312 | # Force gcc to behave correct even for buggy distributions |
eb2cafa1 SR |
313 | CFLAGS += $(call cc-option, -fno-stack-protector) |
314 | ||
070b98bf | 315 | AFLAGS := -D__ASSEMBLY__ |
1da177e4 | 316 | |
f1d28fb0 RZ |
317 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
318 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
2244cbd8 | 319 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
cb58455c | 320 | |
070b98bf SR |
321 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
322 | export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC | |
323 | export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE | |
324 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
1da177e4 LT |
325 | |
326 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | |
070b98bf | 327 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
1da177e4 LT |
328 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
329 | ||
330 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
331 | # tree rather than in the kernel tree. The kernel tree might | |
332 | # even be read-only. | |
333 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
334 | ||
1da177e4 LT |
335 | # Files to ignore in find ... statements |
336 | ||
406119f4 TM |
337 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o |
338 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
339 | |
340 | # =========================================================================== | |
341 | # Rules shared between *config targets and build targets | |
342 | ||
343 | # Basic helpers built in scripts/ | |
4f193362 | 344 | PHONY += scripts_basic |
1da177e4 LT |
345 | scripts_basic: |
346 | $(Q)$(MAKE) $(build)=scripts/basic | |
347 | ||
cd05e6bd JB |
348 | # To avoid any implicit rule to kick in, define an empty command. |
349 | scripts/basic/%: scripts_basic ; | |
350 | ||
4f193362 | 351 | PHONY += outputmakefile |
fd5f0cd6 JB |
352 | # outputmakefile generates a Makefile in the output directory, if using a |
353 | # separate output directory. This allows convenient use of make in the | |
354 | # output directory. | |
1da177e4 | 355 | outputmakefile: |
fd5f0cd6 JB |
356 | ifneq ($(KBUILD_SRC),) |
357 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | |
358 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
359 | endif | |
1da177e4 LT |
360 | |
361 | # To make sure we do not include .config for any of the *config targets | |
362 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
363 | # It is allowed to specify more targets when calling make, including | |
364 | # mixing *config targets and build targets. | |
070b98bf | 365 | # For example 'make oldconfig all'. |
1da177e4 LT |
366 | # Detect when mixed targets is specified, and make a second invocation |
367 | # of make so .config is not included in this case either (for *config). | |
368 | ||
369 | no-dot-config-targets := clean mrproper distclean \ | |
c30a02e0 | 370 | cscope TAGS tags help %docs check% \ |
667918a4 | 371 | include/linux/version.h headers_% \ |
c30a02e0 | 372 | kernelrelease kernelversion |
1da177e4 LT |
373 | |
374 | config-targets := 0 | |
375 | mixed-targets := 0 | |
376 | dot-config := 1 | |
377 | ||
378 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
379 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
380 | dot-config := 0 | |
381 | endif | |
382 | endif | |
383 | ||
384 | ifeq ($(KBUILD_EXTMOD),) | |
385 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
386 | config-targets := 1 | |
387 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | |
388 | mixed-targets := 1 | |
389 | endif | |
390 | endif | |
391 | endif | |
392 | ||
393 | ifeq ($(mixed-targets),1) | |
394 | # =========================================================================== | |
395 | # We're called with mixed targets (*config and build targets). | |
396 | # Handle them one by one. | |
397 | ||
398 | %:: FORCE | |
399 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | |
400 | ||
401 | else | |
402 | ifeq ($(config-targets),1) | |
403 | # =========================================================================== | |
404 | # *config targets only - make sure prerequisites are updated, and descend | |
405 | # in scripts/kconfig to make the *config target | |
406 | ||
407 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
408 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
409 | # used for 'make defconfig' | |
410 | include $(srctree)/arch/$(ARCH)/Makefile | |
411 | export KBUILD_DEFCONFIG | |
412 | ||
cd05e6bd | 413 | config %config: scripts_basic outputmakefile FORCE |
c955ccaf | 414 | $(Q)mkdir -p include/linux include/config |
1da177e4 LT |
415 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
416 | ||
417 | else | |
418 | # =========================================================================== | |
419 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
420 | # targets and others. In general all targets except *config targets. | |
421 | ||
422 | ifeq ($(KBUILD_EXTMOD),) | |
423 | # Additional helpers built in scripts/ | |
424 | # Carefully list dependencies so we do not try to build scripts twice | |
070b98bf | 425 | # in parallel |
4f193362 | 426 | PHONY += scripts |
2e3646e5 | 427 | scripts: scripts_basic include/config/auto.conf |
1da177e4 LT |
428 | $(Q)$(MAKE) $(build)=$(@) |
429 | ||
1da177e4 LT |
430 | # Objects we will link into vmlinux / subdirs we need to visit |
431 | init-y := init/ | |
432 | drivers-y := drivers/ sound/ | |
433 | net-y := net/ | |
434 | libs-y := lib/ | |
435 | core-y := usr/ | |
436 | endif # KBUILD_EXTMOD | |
437 | ||
438 | ifeq ($(dot-config),1) | |
439 | # In this section, we need .config | |
440 | ||
441 | # Read in dependencies to all Kconfig* files, make sure to run | |
442 | # oldconfig if changes are detected. | |
c955ccaf RZ |
443 | -include include/config/auto.conf.cmd |
444 | -include include/config/auto.conf | |
1da177e4 | 445 | |
1da177e4 | 446 | # To avoid any implicit rule to kick in, define an empty command |
14cdd3c4 | 447 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
1da177e4 | 448 | |
c955ccaf | 449 | # If .config is newer than include/config/auto.conf, someone tinkered |
752625cf | 450 | # with it and forgot to run make oldconfig. |
070b98bf | 451 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so |
752625cf | 452 | # we execute the config step to be sure to catch updated Kconfig files |
14cdd3c4 | 453 | include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
3041e47e | 454 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 | 455 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
3041e47e RZ |
456 | else |
457 | $(error kernel configuration not valid - run 'make prepare' in $(srctree) to update it) | |
458 | endif | |
c955ccaf | 459 | |
1da177e4 LT |
460 | else |
461 | # Dummy target needed, because used as prerequisite | |
c955ccaf | 462 | include/config/auto.conf: ; |
1da177e4 LT |
463 | endif |
464 | ||
465 | # The all: target is the default when no target is given on the | |
466 | # command line. | |
467 | # This allow a user to issue only 'make' to build a kernel including modules | |
070b98bf | 468 | # Defaults vmlinux but it is usually overridden in the arch makefile |
1da177e4 LT |
469 | all: vmlinux |
470 | ||
471 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
472 | CFLAGS += -Os | |
473 | else | |
474 | CFLAGS += -O2 | |
475 | endif | |
476 | ||
1da177e4 | 477 | ifdef CONFIG_FRAME_POINTER |
0030cbf0 | 478 | CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) |
1da177e4 LT |
479 | else |
480 | CFLAGS += -fomit-frame-pointer | |
481 | endif | |
482 | ||
604bf5a2 JB |
483 | ifdef CONFIG_UNWIND_INFO |
484 | CFLAGS += -fasynchronous-unwind-tables | |
485 | endif | |
486 | ||
1da177e4 LT |
487 | ifdef CONFIG_DEBUG_INFO |
488 | CFLAGS += -g | |
489 | endif | |
490 | ||
491 | include $(srctree)/arch/$(ARCH)/Makefile | |
492 | ||
e8e69931 | 493 | # arch Makefile may override CC so keep this after arch Makefile is included |
e8f5bdb0 | 494 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 SR |
495 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
496 | ||
1da177e4 LT |
497 | # warn about C99 declaration after statement |
498 | CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | |
499 | ||
070b98bf | 500 | # disable pointer signed / unsigned warnings in gcc 4.0 |
1da177e4 LT |
501 | CFLAGS += $(call cc-option,-Wno-pointer-sign,) |
502 | ||
503 | # Default kernel image to build when no specific target is given. | |
070b98bf | 504 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
505 | # set in the environment |
506 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
507 | # this default value | |
508 | export KBUILD_IMAGE ?= vmlinux | |
509 | ||
510 | # | |
511 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
512 | # images. Default is /boot, but you can set it to other values | |
513 | export INSTALL_PATH ?= /boot | |
514 | ||
515 | # | |
516 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
517 | # relocations required by build roots. This is not defined in the | |
070b98bf | 518 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
519 | # |
520 | ||
df9df036 | 521 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
522 | export MODLIB |
523 | ||
ac031f26 TT |
524 | # |
525 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
526 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
527 | # the default option --strip-debug will be used. Otherwise, | |
528 | # INSTALL_MOD_STRIP will used as the options to the strip command. | |
529 | ||
530 | ifdef INSTALL_MOD_STRIP | |
531 | ifeq ($(INSTALL_MOD_STRIP),1) | |
e340221a | 532 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 TT |
533 | else |
534 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
535 | endif # INSTALL_MOD_STRIP=1 | |
536 | else | |
537 | mod_strip_cmd = true | |
538 | endif # INSTALL_MOD_STRIP | |
539 | export mod_strip_cmd | |
540 | ||
1da177e4 LT |
541 | |
542 | ifeq ($(KBUILD_EXTMOD),) | |
3a65dfe8 | 543 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
544 | |
545 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
546 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
547 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | |
548 | ||
549 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
550 | $(init-n) $(init-) \ | |
551 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ | |
552 | $(net-n) $(net-) $(libs-n) $(libs-)))) | |
553 | ||
554 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
555 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
556 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
557 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
558 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
559 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
560 | libs-y := $(libs-y1) $(libs-y2) | |
561 | ||
562 | # Build vmlinux | |
563 | # --------------------------------------------------------------------------- | |
070b98bf | 564 | # vmlinux is built from the objects selected by $(vmlinux-init) and |
1da177e4 LT |
565 | # $(vmlinux-main). Most are built-in.o files from top-level directories |
566 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. | |
567 | # Ordering when linking is important, and $(vmlinux-init) must be first. | |
568 | # | |
569 | # vmlinux | |
570 | # ^ | |
571 | # | | |
572 | # +-< $(vmlinux-init) | |
573 | # | +--< init/version.o + more | |
574 | # | | |
575 | # +--< $(vmlinux-main) | |
576 | # | +--< driver/built-in.o mm/built-in.o + more | |
577 | # | | |
578 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | |
579 | # | |
580 | # vmlinux version (uname -v) cannot be updated during normal | |
581 | # descending-into-subdirs phase since we do not yet know if we need to | |
582 | # update vmlinux. | |
583 | # Therefore this step is delayed until just before final link of vmlinux - | |
584 | # except in the kallsyms case where it is done just before adding the | |
585 | # symbols to the kernel. | |
586 | # | |
587 | # System.map is generated to document addresses of all kernel symbols | |
588 | ||
589 | vmlinux-init := $(head-y) $(init-y) | |
590 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) | |
591 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) | |
592 | vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds | |
593 | ||
594 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS | |
595 | # May be overridden by arch/$(ARCH)/Makefile | |
596 | quiet_cmd_vmlinux__ ?= LD $@ | |
597 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ | |
598 | -T $(vmlinux-lds) $(vmlinux-init) \ | |
599 | --start-group $(vmlinux-main) --end-group \ | |
600 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) | |
601 | ||
602 | # Generate new vmlinux version | |
603 | quiet_cmd_vmlinux_version = GEN .version | |
604 | cmd_vmlinux_version = set -e; \ | |
4e25d8bb JB |
605 | if [ ! -r .version ]; then \ |
606 | rm -f .version; \ | |
607 | echo 1 >.version; \ | |
608 | else \ | |
609 | mv .version .old_version; \ | |
610 | expr 0$$(cat .old_version) + 1 >.version; \ | |
611 | fi; \ | |
1da177e4 LT |
612 | $(MAKE) $(build)=init |
613 | ||
614 | # Generate System.map | |
070b98bf | 615 | quiet_cmd_sysmap = SYSMAP |
1da177e4 LT |
616 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
617 | ||
618 | # Link of vmlinux | |
619 | # If CONFIG_KALLSYMS is set .version is already updated | |
620 | # Generate System.map and verify that the content is consistent | |
39ca371c MR |
621 | # Use + in front of the vmlinux_version rule to silent warning with make -j2 |
622 | # First command is ':' to allow us to use + in front of the rule | |
1da177e4 | 623 | define rule_vmlinux__ |
39ca371c | 624 | : |
1da177e4 LT |
625 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) |
626 | ||
627 | $(call cmd,vmlinux__) | |
628 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
629 | ||
630 | $(Q)$(if $($(quiet)cmd_sysmap), \ | |
631 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ | |
632 | $(cmd_sysmap) $@ System.map; \ | |
633 | if [ $$? -ne 0 ]; then \ | |
634 | rm -f $@; \ | |
635 | /bin/false; \ | |
636 | fi; | |
637 | $(verify_kallsyms) | |
638 | endef | |
639 | ||
640 | ||
641 | ifdef CONFIG_KALLSYMS | |
642 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) | |
643 | # It's a three stage process: | |
644 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is | |
645 | # empty | |
646 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
647 | # the right size - vmlinux version (uname -v) is updated during this step | |
648 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, | |
649 | # but due to the added section, some addresses have shifted. | |
650 | # From here, we generate a correct .tmp_kallsyms2.o | |
651 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. | |
652 | # o Verify that the System.map from vmlinux matches the map from | |
653 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. | |
654 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | |
655 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a | |
656 | # temporary bypass to allow the kernel to be built while the | |
657 | # maintainers work out what went wrong with kallsyms. | |
658 | ||
659 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | |
660 | last_kallsyms := 3 | |
661 | else | |
662 | last_kallsyms := 2 | |
663 | endif | |
664 | ||
665 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | |
666 | ||
667 | define verify_kallsyms | |
668 | $(Q)$(if $($(quiet)cmd_sysmap), \ | |
669 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | |
670 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map | |
671 | $(Q)cmp -s System.map .tmp_System.map || \ | |
672 | (echo Inconsistent kallsyms data; \ | |
673 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | |
674 | rm .tmp_kallsyms* ; /bin/false ) | |
675 | endef | |
676 | ||
677 | # Update vmlinux version before link | |
678 | # Use + in front of this rule to silent warning about make -j1 | |
72ba47c1 | 679 | # First command is ':' to allow us to use + in front of this rule |
1da177e4 LT |
680 | cmd_ksym_ld = $(cmd_vmlinux__) |
681 | define rule_ksym_ld | |
72ba47c1 | 682 | : |
1da177e4 LT |
683 | +$(call cmd,vmlinux_version) |
684 | $(call cmd,vmlinux__) | |
685 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
686 | endef | |
687 | ||
688 | # Generate .S file with all kernel symbols | |
689 | quiet_cmd_kallsyms = KSYM $@ | |
690 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ | |
691 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | |
692 | ||
693 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE | |
694 | $(call if_changed_dep,as_o_S) | |
695 | ||
696 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) | |
697 | $(call cmd,kallsyms) | |
698 | ||
699 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version | |
700 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE | |
701 | $(call if_changed_rule,ksym_ld) | |
702 | ||
703 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE | |
704 | $(call if_changed,vmlinux__) | |
705 | ||
706 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE | |
707 | $(call if_changed,vmlinux__) | |
708 | ||
709 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | |
710 | $(KALLSYMS): scripts ; | |
711 | ||
33bc25ea SR |
712 | # Generate some data for debugging strange kallsyms problems |
713 | debug_kallsyms: .tmp_map$(last_kallsyms) | |
714 | ||
715 | .tmp_map%: .tmp_vmlinux% FORCE | |
716 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ | |
717 | ||
718 | .tmp_map3: .tmp_map2 | |
719 | ||
720 | .tmp_map2: .tmp_map1 | |
721 | ||
1da177e4 LT |
722 | endif # ifdef CONFIG_KALLSYMS |
723 | ||
724 | # vmlinux image - including updated kernel symbols | |
725 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE | |
726 | $(call if_changed_rule,vmlinux__) | |
4e25d8bb | 727 | $(Q)rm -f .old_version |
1da177e4 LT |
728 | |
729 | # The actual objects are generated when descending, | |
730 | # make sure no implicit rule kicks in | |
731 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; | |
732 | ||
733 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
734 | # Preset locale variables to speed up the build process. Limit locale | |
735 | # tweaks to this spot to avoid wrong language settings when running | |
736 | # make menuconfig etc. | |
737 | # Error messages still appears in the original language | |
738 | ||
4f193362 | 739 | PHONY += $(vmlinux-dirs) |
5bb78269 | 740 | $(vmlinux-dirs): prepare scripts |
1da177e4 LT |
741 | $(Q)$(MAKE) $(build)=$@ |
742 | ||
cb58455c | 743 | # Build the kernel release string |
f1d28fb0 | 744 | # The KERNELRELEASE is stored in a file named include/config/kernel.release |
cb58455c SR |
745 | # to be used when executing for example make install or make modules_install |
746 | # | |
747 | # Take the contents of any files called localversion* and the config | |
748 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. | |
749 | # LOCALVERSION from the command line override all of this | |
750 | ||
751 | nullstring := | |
752 | space := $(nullstring) # end of line | |
753 | ||
754 | ___localver = $(objtree)/localversion* $(srctree)/localversion* | |
755 | __localver = $(sort $(wildcard $(___localver))) | |
756 | # skip backup files (containing '~') | |
757 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) | |
758 | ||
759 | localver = $(subst $(space),, \ | |
760 | $(shell cat /dev/null $(_localver)) \ | |
761 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | |
070b98bf | 762 | |
cb58455c SR |
763 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
764 | # and if the SCM is know a tag from the SCM is appended. | |
070b98bf | 765 | # The appended tag is determined by the SCM used. |
cb58455c SR |
766 | # |
767 | # Currently, only git is supported. | |
768 | # Other SCMs can edit scripts/setlocalversion and add the appropriate | |
769 | # checks as needed. | |
770 | ifdef CONFIG_LOCALVERSION_AUTO | |
771 | _localver-auto = $(shell $(CONFIG_SHELL) \ | |
772 | $(srctree)/scripts/setlocalversion $(srctree)) | |
773 | localver-auto = $(LOCALVERSION)$(_localver-auto) | |
774 | endif | |
775 | ||
776 | localver-full = $(localver)$(localver-auto) | |
777 | ||
f1d28fb0 | 778 | # Store (new) KERNELRELASE string in include/config/kernel.release |
2244cbd8 | 779 | kernelrelease = $(KERNELVERSION)$(localver-full) |
f1d28fb0 | 780 | include/config/kernel.release: include/config/auto.conf FORCE |
2244cbd8 SR |
781 | $(Q)rm -f $@ |
782 | $(Q)echo $(kernelrelease) > $@ | |
cb58455c SR |
783 | |
784 | ||
1da177e4 | 785 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
786 | # or the modules are listed in "prepare". |
787 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
788 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
789 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 790 | |
5bb78269 | 791 | # Listed in dependency order |
4f193362 | 792 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
5bb78269 SR |
793 | |
794 | # prepare-all is deprecated, use prepare as valid replacement | |
4f193362 | 795 | PHONY += prepare-all |
1da177e4 | 796 | |
86feeaa8 | 797 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
798 | # and if so do: |
799 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
800 | # 2) Create the include2 directory, used for the second asm symlink | |
f1d28fb0 | 801 | prepare3: include/config/kernel.release |
1da177e4 LT |
802 | ifneq ($(KBUILD_SRC),) |
803 | @echo ' Using $(srctree) as source for kernel' | |
c955ccaf | 804 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
1da177e4 LT |
805 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
806 | echo " in the '$(srctree)' directory.";\ | |
807 | /bin/false; \ | |
808 | fi; | |
809 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; | |
810 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm | |
811 | endif | |
812 | ||
86feeaa8 SR |
813 | # prepare2 creates a makefile if using a separate output directory |
814 | prepare2: prepare3 outputmakefile | |
1da177e4 | 815 | |
63104eec SR |
816 | prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ |
817 | include/asm include/config/auto.conf | |
1da177e4 | 818 | ifneq ($(KBUILD_MODULES),) |
1da177e4 | 819 | $(Q)mkdir -p $(MODVERDIR) |
fca1dff2 | 820 | $(Q)rm -f $(MODVERDIR)/* |
1da177e4 LT |
821 | endif |
822 | ||
5bb78269 SR |
823 | archprepare: prepare1 scripts_basic |
824 | ||
825 | prepare0: archprepare FORCE | |
8d36a623 | 826 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 827 | |
1da177e4 | 828 | # All the preparing.. |
5bb78269 | 829 | prepare prepare-all: prepare0 |
1da177e4 | 830 | |
070b98bf SR |
831 | # Leave this as default for preprocessing vmlinux.lds.S, which is now |
832 | # done in arch/$(ARCH)/kernel/Makefile | |
1da177e4 LT |
833 | |
834 | export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) | |
835 | ||
070b98bf SR |
836 | # FIXME: The asm symlink changes when $(ARCH) changes. That's |
837 | # hard to detect, but I suppose "make mrproper" is a good idea | |
838 | # before switching between archs anyway. | |
1da177e4 LT |
839 | |
840 | include/asm: | |
841 | @echo ' SYMLINK $@ -> include/asm-$(ARCH)' | |
842 | $(Q)if [ ! -d include ]; then mkdir -p include; fi; | |
843 | @ln -fsn asm-$(ARCH) $@ | |
844 | ||
1da177e4 LT |
845 | # Generate some files |
846 | # --------------------------------------------------------------------------- | |
847 | ||
848 | # KERNELRELEASE can change from a few different places, meaning version.h | |
849 | # needs to be updated, so this check is forced on all builds | |
850 | ||
851 | uts_len := 64 | |
63104eec SR |
852 | define filechk_utsrelease.h |
853 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
854 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
855 | exit 1; \ | |
856 | fi; \ | |
857 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
858 | endef | |
1da177e4 LT |
859 | |
860 | define filechk_version.h | |
63104eec SR |
861 | (echo \#define LINUX_VERSION_CODE $(shell \ |
862 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ | |
863 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) | |
1da177e4 LT |
864 | endef |
865 | ||
63104eec | 866 | include/linux/version.h: $(srctree)/Makefile FORCE |
1da177e4 LT |
867 | $(call filechk,version.h) |
868 | ||
63104eec SR |
869 | include/linux/utsrelease.h: include/config/kernel.release FORCE |
870 | $(call filechk,utsrelease.h) | |
871 | ||
1da177e4 LT |
872 | # --------------------------------------------------------------------------- |
873 | ||
4f193362 | 874 | PHONY += depend dep |
1da177e4 LT |
875 | depend dep: |
876 | @echo '*** Warning: make $@ is unnecessary now.' | |
877 | ||
8d730cfb DW |
878 | # --------------------------------------------------------------------------- |
879 | # Kernel headers | |
880 | INSTALL_HDR_PATH=$(MODLIB)/abi | |
881 | export INSTALL_HDR_PATH | |
882 | ||
883 | PHONY += headers_install | |
884 | headers_install: include/linux/version.h | |
885 | $(Q)unifdef -Ux /dev/null | |
886 | $(Q)rm -rf $(INSTALL_HDR_PATH)/include | |
887 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include | |
888 | ||
68475359 DW |
889 | PHONY += headers_check |
890 | headers_check: headers_install | |
891 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1 | |
892 | ||
1da177e4 LT |
893 | # --------------------------------------------------------------------------- |
894 | # Modules | |
895 | ||
896 | ifdef CONFIG_MODULES | |
897 | ||
070b98bf | 898 | # By default, build modules as well |
1da177e4 LT |
899 | |
900 | all: modules | |
901 | ||
902 | # Build modules | |
903 | ||
4f193362 | 904 | PHONY += modules |
1da177e4 LT |
905 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) |
906 | @echo ' Building modules, stage 2.'; | |
907 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | |
908 | ||
909 | ||
910 | # Target to prepare building external modules | |
4f193362 | 911 | PHONY += modules_prepare |
5bb78269 | 912 | modules_prepare: prepare scripts |
1da177e4 LT |
913 | |
914 | # Target to install modules | |
4f193362 | 915 | PHONY += modules_install |
1da177e4 LT |
916 | modules_install: _modinst_ _modinst_post |
917 | ||
4f193362 | 918 | PHONY += _modinst_ |
1da177e4 | 919 | _modinst_: |
ce454d4d | 920 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
1da177e4 LT |
921 | echo "Warning: you may need to install module-init-tools"; \ |
922 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | |
923 | sleep 1; \ | |
924 | fi | |
925 | @rm -rf $(MODLIB)/kernel | |
926 | @rm -f $(MODLIB)/source | |
927 | @mkdir -p $(MODLIB)/kernel | |
928 | @ln -s $(srctree) $(MODLIB)/source | |
929 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
930 | rm -f $(MODLIB)/build ; \ | |
931 | ln -s $(objtree) $(MODLIB)/build ; \ | |
932 | fi | |
933 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | |
934 | ||
935 | # If System.map exists, run depmod. This deliberately does not have a | |
936 | # dependency on System.map since that would run the dependency tree on | |
937 | # vmlinux. This depmod is only for convenience to give the initial | |
938 | # boot a modules.dep even before / is mounted read-write. However the | |
939 | # boot script depmod is the master version. | |
940 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" | |
941 | depmod_opts := | |
942 | else | |
943 | depmod_opts := -b $(INSTALL_MOD_PATH) -r | |
944 | endif | |
4f193362 | 945 | PHONY += _modinst_post |
1da177e4 LT |
946 | _modinst_post: _modinst_ |
947 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi | |
948 | ||
949 | else # CONFIG_MODULES | |
950 | ||
951 | # Modules not configured | |
952 | # --------------------------------------------------------------------------- | |
953 | ||
954 | modules modules_install: FORCE | |
955 | @echo | |
956 | @echo "The present kernel configuration has modules disabled." | |
957 | @echo "Type 'make config' and enable loadable module support." | |
958 | @echo "Then build a kernel with module support enabled." | |
959 | @echo | |
960 | @exit 1 | |
961 | ||
962 | endif # CONFIG_MODULES | |
963 | ||
1da177e4 LT |
964 | ### |
965 | # Cleaning is done on three levels. | |
966 | # make clean Delete most generated files | |
967 | # Leave enough to build external modules | |
968 | # make mrproper Delete the current configuration, and all generated files | |
969 | # make distclean Remove editor backup files, patch leftover files and the like | |
970 | ||
971 | # Directories & files removed with 'make clean' | |
972 | CLEAN_DIRS += $(MODVERDIR) | |
973 | CLEAN_FILES += vmlinux System.map \ | |
974 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map | |
975 | ||
976 | # Directories & files removed with 'make mrproper' | |
977 | MRPROPER_DIRS += include/config include2 | |
50aa88e2 | 978 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
63104eec SR |
979 | include/linux/autoconf.h include/linux/version.h \ |
980 | include/linux/utsrelease.h \ | |
f1d28fb0 | 981 | Module.symvers tags TAGS cscope* |
1da177e4 LT |
982 | |
983 | # clean - Delete most, but leave enough to build external modules | |
984 | # | |
985 | clean: rm-dirs := $(CLEAN_DIRS) | |
986 | clean: rm-files := $(CLEAN_FILES) | |
86feeaa8 | 987 | clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) |
1da177e4 | 988 | |
4f193362 | 989 | PHONY += $(clean-dirs) clean archclean |
1da177e4 LT |
990 | $(clean-dirs): |
991 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
992 | ||
993 | clean: archclean $(clean-dirs) | |
994 | $(call cmd,rmdirs) | |
995 | $(call cmd,rmfiles) | |
996 | @find . $(RCS_FIND_IGNORE) \ | |
070b98bf | 997 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
15fde675 AG |
998 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
999 | -o -name '*.symtypes' \) \ | |
1da177e4 LT |
1000 | -type f -print | xargs rm -f |
1001 | ||
1002 | # mrproper - Delete all generated files, including .config | |
1003 | # | |
1004 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1005 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1006 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1007 | ||
4f193362 | 1008 | PHONY += $(mrproper-dirs) mrproper archmrproper |
1da177e4 LT |
1009 | $(mrproper-dirs): |
1010 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1011 | ||
1012 | mrproper: clean archmrproper $(mrproper-dirs) | |
1013 | $(call cmd,rmdirs) | |
1014 | $(call cmd,rmfiles) | |
1015 | ||
1016 | # distclean | |
1017 | # | |
4f193362 | 1018 | PHONY += distclean |
1da177e4 LT |
1019 | |
1020 | distclean: mrproper | |
1021 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1022 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
1da177e4 | 1023 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
070b98bf | 1024 | -o -name '.*.rej' -o -size 0 \ |
1da177e4 LT |
1025 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
1026 | -type f -print | xargs rm -f | |
1027 | ||
1028 | ||
1029 | # Packaging of the kernel to various formats | |
1030 | # --------------------------------------------------------------------------- | |
1031 | # rpm target kept for backward compatibility | |
1032 | package-dir := $(srctree)/scripts/package | |
1033 | ||
031ecc6d | 1034 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1035 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
031ecc6d | 1036 | rpm: include/config/kernel.release FORCE |
6c2133e1 | 1037 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1038 | |
1039 | ||
1040 | # Brief documentation of the typical targets used | |
1041 | # --------------------------------------------------------------------------- | |
1042 | ||
1043 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) | |
1044 | boards := $(notdir $(boards)) | |
1045 | ||
1046 | help: | |
1047 | @echo 'Cleaning targets:' | |
1048 | @echo ' clean - remove most generated files but keep the config' | |
1049 | @echo ' mrproper - remove all generated files + config + various backup files' | |
1050 | @echo '' | |
1051 | @echo 'Configuration targets:' | |
1052 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1053 | @echo '' | |
1054 | @echo 'Other generic targets:' | |
1055 | @echo ' all - Build all targets marked with [*]' | |
1056 | @echo '* vmlinux - Build the bare kernel' | |
1057 | @echo '* modules - Build all modules' | |
9cc5d74c | 1058 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 LT |
1059 | @echo ' dir/ - Build all files in dir and below' |
1060 | @echo ' dir/file.[ois] - Build specified target only' | |
155ad605 | 1061 | @echo ' dir/file.ko - Build module including final link' |
1da177e4 LT |
1062 | @echo ' rpm - Build a kernel as an RPM package' |
1063 | @echo ' tags/TAGS - Generate tags file for editors' | |
1064 | @echo ' cscope - Generate cscope index' | |
6d128842 | 1065 | @echo ' kernelrelease - Output the release version string' |
cb58455c | 1066 | @echo ' kernelversion - Output the version stored in Makefile' |
8d730cfb DW |
1067 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH' |
1068 | @echo ' (default: /lib/modules/$$VERSION/abi)' | |
1da177e4 LT |
1069 | @echo '' |
1070 | @echo 'Static analysers' | |
1da177e4 LT |
1071 | @echo ' checkstack - Generate a list of stack hogs' |
1072 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1073 | @echo '' | |
1074 | @echo 'Kernel packaging:' | |
6c2133e1 | 1075 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1076 | @echo '' |
1077 | @echo 'Documentation targets:' | |
1078 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1079 | @echo '' | |
1080 | @echo 'Architecture specific targets ($(ARCH)):' | |
1081 | @$(if $(archhelp),$(archhelp),\ | |
1082 | echo ' No architecture specific help defined for $(ARCH)') | |
1083 | @echo '' | |
1084 | @$(if $(boards), \ | |
1085 | $(foreach b, $(boards), \ | |
1086 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1087 | echo '') | |
1088 | ||
1089 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1090 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
701842e3 DK |
1091 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' |
1092 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1da177e4 LT |
1093 | @echo '' |
1094 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1095 | @echo 'For further info see the ./README file' | |
1096 | ||
1097 | ||
1098 | # Documentation targets | |
1099 | # --------------------------------------------------------------------------- | |
1100 | %docs: scripts_basic FORCE | |
1101 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | |
1102 | ||
1103 | else # KBUILD_EXTMOD | |
1104 | ||
1105 | ### | |
1106 | # External module support. | |
1107 | # When building external modules the kernel used as basis is considered | |
1108 | # read-only, and no consistency checks are made and the make | |
1109 | # system is not used on the basis kernel. If updates are required | |
1110 | # in the basis kernel ordinary make commands (without M=...) must | |
1111 | # be used. | |
1112 | # | |
1113 | # The following are the only valid targets when building external | |
1114 | # modules. | |
1115 | # make M=dir clean Delete all automatically generated files | |
1116 | # make M=dir modules Make all modules in specified dir | |
1117 | # make M=dir Same as 'make M=dir modules' | |
1118 | # make M=dir modules_install | |
070b98bf | 1119 | # Install the modules built in the module directory |
1da177e4 LT |
1120 | # Assumes install directory is already created |
1121 | ||
1122 | # We are always building modules | |
1123 | KBUILD_MODULES := 1 | |
4f193362 | 1124 | PHONY += crmodverdir |
1da177e4 LT |
1125 | crmodverdir: |
1126 | $(Q)mkdir -p $(MODVERDIR) | |
fca1dff2 | 1127 | $(Q)rm -f $(MODVERDIR)/* |
1da177e4 | 1128 | |
4f193362 | 1129 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1130 | $(objtree)/Module.symvers: |
1131 | @test -e $(objtree)/Module.symvers || ( \ | |
1132 | echo; \ | |
1133 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1134 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1135 | echo ) | |
1136 | ||
1137 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1138 | PHONY += $(module-dirs) modules |
1da177e4 LT |
1139 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1140 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1141 | ||
1142 | modules: $(module-dirs) | |
1143 | @echo ' Building modules, stage 2.'; | |
1144 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | |
1145 | ||
4f193362 | 1146 | PHONY += modules_install |
a67dc21a | 1147 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1148 | |
4f193362 PS |
1149 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1150 | PHONY += _emodinst_ | |
a67dc21a | 1151 | _emodinst_: |
a67dc21a | 1152 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
1da177e4 LT |
1153 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
1154 | ||
a67dc21a SR |
1155 | # Run depmod only is we have System.map and depmod is executable |
1156 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1157 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ | |
1158 | $(DEPMOD) -ae -F System.map \ | |
1159 | $(if $(strip $(INSTALL_MOD_PATH)), \ | |
1160 | -b $(INSTALL_MOD_PATH) -r) \ | |
1161 | $(KERNELRELEASE); \ | |
1162 | fi | |
1163 | ||
4f193362 | 1164 | PHONY += _emodinst_post |
a67dc21a SR |
1165 | _emodinst_post: _emodinst_ |
1166 | $(call cmd,depmod) | |
1167 | ||
1da177e4 LT |
1168 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1169 | ||
4f193362 | 1170 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1171 | $(clean-dirs): |
1172 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1173 | ||
1174 | clean: rm-dirs := $(MODVERDIR) | |
1175 | clean: $(clean-dirs) | |
1176 | $(call cmd,rmdirs) | |
1177 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1178 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
1da177e4 LT |
1179 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
1180 | -type f -print | xargs rm -f | |
1181 | ||
1182 | help: | |
1183 | @echo ' Building external modules.' | |
1184 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1185 | @echo '' | |
1186 | @echo ' modules - default target, build the module(s)' | |
1187 | @echo ' modules_install - install the module' | |
1188 | @echo ' clean - remove generated files in module directory only' | |
1189 | @echo '' | |
06300b21 SR |
1190 | |
1191 | # Dummies... | |
4f193362 | 1192 | PHONY += prepare scripts |
06300b21 SR |
1193 | prepare: ; |
1194 | scripts: ; | |
1da177e4 LT |
1195 | endif # KBUILD_EXTMOD |
1196 | ||
1197 | # Generate tags for editors | |
1198 | # --------------------------------------------------------------------------- | |
1199 | ||
1200 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set | |
1201 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. | |
1202 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! | |
1203 | ||
f182ae62 | 1204 | ifeq ($(src),$(obj)) |
1da177e4 LT |
1205 | __srctree = |
1206 | else | |
1207 | __srctree = $(srctree)/ | |
1208 | endif | |
1209 | ||
2ab23c95 PBG |
1210 | ifeq ($(ALLSOURCE_ARCHS),) |
1211 | ifeq ($(ARCH),um) | |
1212 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) | |
1213 | else | |
1214 | ALLINCLUDE_ARCHS := $(ARCH) | |
1215 | endif | |
1216 | else | |
070b98bf | 1217 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. |
2ab23c95 PBG |
1218 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) |
1219 | endif | |
1220 | ||
a0674e88 IC |
1221 | ALLSOURCE_ARCHS := $(ARCH) |
1222 | ||
e838db68 MY |
1223 | define find-sources |
1224 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ | |
1da177e4 | 1225 | \( -name include -o -name arch \) -prune -o \ |
e838db68 | 1226 | -name $1 -print; \ |
a0674e88 IC |
1227 | for ARCH in $(ALLSOURCE_ARCHS) ; do \ |
1228 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ | |
e838db68 | 1229 | -name $1 -print; \ |
a0674e88 | 1230 | done ; \ |
1da177e4 | 1231 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ |
e838db68 | 1232 | -name $1 -print; \ |
1da177e4 LT |
1233 | find $(__srctree)include $(RCS_FIND_IGNORE) \ |
1234 | \( -name config -o -name 'asm-*' \) -prune \ | |
e838db68 | 1235 | -o -name $1 -print; \ |
2ab23c95 | 1236 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \ |
a0674e88 | 1237 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ |
e838db68 | 1238 | -name $1 -print; \ |
a0674e88 | 1239 | done ; \ |
1da177e4 | 1240 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ |
e838db68 MY |
1241 | -name $1 -print ) |
1242 | endef | |
1243 | ||
1244 | define all-sources | |
1245 | $(call find-sources,'*.[chS]') | |
1246 | endef | |
1247 | define all-kconfigs | |
1248 | $(call find-sources,'Kconfig*') | |
1249 | endef | |
1250 | define all-defconfigs | |
1251 | $(call find-sources,'defconfig') | |
1da177e4 LT |
1252 | endef |
1253 | ||
1254 | quiet_cmd_cscope-file = FILELST cscope.files | |
acbef459 | 1255 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
1da177e4 LT |
1256 | |
1257 | quiet_cmd_cscope = MAKE cscope.out | |
acbef459 | 1258 | cmd_cscope = cscope -b |
1da177e4 LT |
1259 | |
1260 | cscope: FORCE | |
1261 | $(call cmd,cscope-file) | |
1262 | $(call cmd,cscope) | |
1263 | ||
1264 | quiet_cmd_TAGS = MAKE $@ | |
66d609ec SR |
1265 | define cmd_TAGS |
1266 | rm -f $@; \ | |
54e08a23 ST |
1267 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ |
1268 | echo "-I __initdata,__exitdata,__acquires,__releases \ | |
1269 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | |
1270 | --extra=+f --c-kinds=+px"`; \ | |
e838db68 MY |
1271 | $(all-sources) | xargs etags $$ETAGSF -a; \ |
1272 | if test "x$$ETAGSF" = x; then \ | |
1273 | $(all-kconfigs) | xargs etags -a \ | |
1274 | --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ | |
1275 | $(all-defconfigs) | xargs etags -a \ | |
1276 | --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ | |
1277 | fi | |
66d609ec SR |
1278 | endef |
1279 | ||
1280 | TAGS: FORCE | |
1281 | $(call cmd,TAGS) | |
1da177e4 | 1282 | |
1da177e4 LT |
1283 | |
1284 | quiet_cmd_tags = MAKE $@ | |
1285 | define cmd_tags | |
1286 | rm -f $@; \ | |
54e08a23 ST |
1287 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ |
1288 | echo "-I __initdata,__exitdata,__acquires,__releases \ | |
1289 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | |
1290 | --extra=+f --c-kinds=+px"`; \ | |
f6333eb4 | 1291 | $(all-sources) | xargs ctags $$CTAGSF -a |
1da177e4 LT |
1292 | endef |
1293 | ||
1da177e4 LT |
1294 | tags: FORCE |
1295 | $(call cmd,tags) | |
1296 | ||
1297 | ||
1298 | # Scripts to check various things for consistency | |
1299 | # --------------------------------------------------------------------------- | |
1300 | ||
1da177e4 LT |
1301 | includecheck: |
1302 | find * $(RCS_FIND_IGNORE) \ | |
1303 | -name '*.[hcS]' -type f -print | sort \ | |
1304 | | xargs $(PERL) -w scripts/checkincludes.pl | |
1305 | ||
1306 | versioncheck: | |
1307 | find * $(RCS_FIND_IGNORE) \ | |
1308 | -name '*.[hcS]' -type f -print | sort \ | |
1309 | | xargs $(PERL) -w scripts/checkversion.pl | |
1310 | ||
1da177e4 LT |
1311 | namespacecheck: |
1312 | $(PERL) $(srctree)/scripts/namespace.pl | |
1313 | ||
1314 | endif #ifeq ($(config-targets),1) | |
1315 | endif #ifeq ($(mixed-targets),1) | |
1316 | ||
c30a02e0 | 1317 | PHONY += checkstack kernelrelease kernelversion |
1da177e4 LT |
1318 | checkstack: |
1319 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1320 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) | |
1321 | ||
1322 | kernelrelease: | |
f1d28fb0 RZ |
1323 | $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ |
1324 | $(error kernelrelease not valid - run 'make prepare' to update it)) | |
cb58455c | 1325 | kernelversion: |
2244cbd8 | 1326 | @echo $(KERNELVERSION) |
1da177e4 | 1327 | |
06300b21 SR |
1328 | # Single targets |
1329 | # --------------------------------------------------------------------------- | |
bc2546a6 SR |
1330 | # Single targets are compatible with: |
1331 | # - build whith mixed source and output | |
1332 | # - build with separate output dir 'make O=...' | |
1333 | # - external modules | |
1334 | # | |
1335 | # target-dir => where to store outputfile | |
1336 | # build-dir => directory in kernel source tree to use | |
1337 | ||
1338 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1339 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1340 | target-dir = $(dir $@) |
1341 | else | |
1342 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1343 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1344 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1345 | endif | |
1346 | ||
f6ecebd6 | 1347 | %.s: %.c prepare scripts FORCE |
bc2546a6 | 1348 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1349 | %.i: %.c prepare scripts FORCE |
bc2546a6 | 1350 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1351 | %.o: %.c prepare scripts FORCE |
bc2546a6 | 1352 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1353 | %.lst: %.c prepare scripts FORCE |
bc2546a6 | 1354 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1355 | %.s: %.S prepare scripts FORCE |
bc2546a6 | 1356 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1357 | %.o: %.S prepare scripts FORCE |
bc2546a6 | 1358 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
15fde675 AG |
1359 | %.symtypes: %.c prepare scripts FORCE |
1360 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
06300b21 | 1361 | |
bc2546a6 SR |
1362 | # Modules |
1363 | / %/: prepare scripts FORCE | |
06300b21 | 1364 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 SR |
1365 | $(build)=$(build-dir) |
1366 | %.ko: prepare scripts FORCE | |
06300b21 | 1367 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1368 | $(build)=$(build-dir) $(@:.ko=.o) |
06300b21 SR |
1369 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
1370 | ||
1da177e4 LT |
1371 | # FIXME Should go into a make.lib or something |
1372 | # =========================================================================== | |
1373 | ||
1374 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1375 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1376 | ||
1377 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1378 | cmd_rmfiles = rm -f $(rm-files) | |
1379 | ||
1380 | ||
1381 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ | |
1382 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ | |
5e8d780d | 1383 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) |
1da177e4 LT |
1384 | |
1385 | quiet_cmd_as_o_S = AS $@ | |
1386 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
1387 | ||
1388 | # read all saved command lines | |
1389 | ||
1390 | targets := $(wildcard $(sort $(targets))) | |
1391 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1392 | ||
1393 | ifneq ($(cmd_files),) | |
1394 | $(cmd_files): ; # Do not try to update included dependency files | |
1395 | include $(cmd_files) | |
1396 | endif | |
1397 | ||
1da177e4 LT |
1398 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
1399 | # Usage: | |
1400 | # $(Q)$(MAKE) $(clean)=dir | |
1401 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | |
1402 | ||
1da177e4 LT |
1403 | endif # skip-makefile |
1404 | ||
4f193362 | 1405 | PHONY += FORCE |
1da177e4 | 1406 | FORCE: |
4f193362 PS |
1407 | |
1408 | ||
1409 | # Declare the contents of the .PHONY variable as phony. We keep that | |
1410 | # information in a variable se we can use it in if_changed and friends. | |
1411 | .PHONY: $(PHONY) |