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1da177e4 LT |
1 | VERSION = 2 |
2 | PATCHLEVEL = 6 | |
c9927c2b | 3 | SUBLEVEL = 24 |
ea67db4c | 4 | EXTRAVERSION = -rc6 |
81cfe79b | 5 | NAME = Arr Matey! A Hairy Bilge Rat! |
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 | ||
15964864 OV |
13 | # Do not: |
14 | # o use make's built-in rules and variables | |
15 | # (this increases performance and avoid hard-to-debug behavour); | |
16 | # o print "Entering directory ..."; | |
17 | MAKEFLAGS += -rR --no-print-directory | |
1da177e4 LT |
18 | |
19 | # We are using a recursive build, so we need to do a little thinking | |
20 | # to get the ordering right. | |
21 | # | |
22 | # Most importantly: sub-Makefiles should only ever modify files in | |
23 | # their own directory. If in some directory we have a dependency on | |
24 | # a file in another dir (which doesn't happen often, but it's often | |
25 | # unavoidable when linking the built-in.o targets which finally | |
26 | # turn into vmlinux), we will call a sub make in that other dir, and | |
27 | # after that we are sure that everything which is in that other dir | |
28 | # is now up to date. | |
29 | # | |
30 | # The only cases where we need to modify files which have global | |
31 | # effects are thus separated out and done before the recursive | |
32 | # descending is started. They are now explicitly listed as the | |
33 | # prepare rule. | |
34 | ||
35 | # To put more focus on warnings, be less verbose as default | |
36 | # Use 'make V=1' to see the full commands | |
37 | ||
38 | ifdef V | |
39 | ifeq ("$(origin V)", "command line") | |
40 | KBUILD_VERBOSE = $(V) | |
41 | endif | |
42 | endif | |
43 | ifndef KBUILD_VERBOSE | |
44 | KBUILD_VERBOSE = 0 | |
45 | endif | |
46 | ||
1c7bafe7 RD |
47 | # Call a source code checker (by default, "sparse") as part of the |
48 | # C compilation. | |
49 | # | |
50 | # Use 'make C=1' to enable checking of only re-compiled files. | |
51 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
52 | # of whether they are re-compiled or not. | |
53 | # | |
54 | # See the file "Documentation/sparse.txt" for more details, including | |
55 | # where to get the "sparse" utility. | |
1da177e4 LT |
56 | |
57 | ifdef C | |
58 | ifeq ("$(origin C)", "command line") | |
59 | KBUILD_CHECKSRC = $(C) | |
60 | endif | |
61 | endif | |
62 | ifndef KBUILD_CHECKSRC | |
63 | KBUILD_CHECKSRC = 0 | |
64 | endif | |
65 | ||
66 | # Use make M=dir to specify directory of external module to build | |
67 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
68 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
69 | ifdef SUBDIRS | |
70 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
71 | endif | |
72 | ifdef M | |
73 | ifeq ("$(origin M)", "command line") | |
74 | KBUILD_EXTMOD := $(M) | |
75 | endif | |
76 | endif | |
77 | ||
78 | ||
79 | # kbuild supports saving output files in a separate directory. | |
80 | # To locate output files in a separate directory two syntaxes are supported. | |
81 | # In both cases the working directory must be the root of the kernel src. | |
82 | # 1) O= | |
83 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 84 | # |
1da177e4 LT |
85 | # 2) Set KBUILD_OUTPUT |
86 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
87 | # where the output files shall be placed. | |
88 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
89 | # make | |
90 | # | |
91 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
92 | # variable. | |
93 | ||
94 | ||
95 | # KBUILD_SRC is set on invocation of make in OBJ directory | |
96 | # KBUILD_SRC is not intended to be used by the regular user (for now) | |
97 | ifeq ($(KBUILD_SRC),) | |
98 | ||
99 | # OK, Make called in directory where kernel src resides | |
100 | # Do we want to locate output files in a separate directory? | |
101 | ifdef O | |
102 | ifeq ("$(origin O)", "command line") | |
103 | KBUILD_OUTPUT := $(O) | |
104 | endif | |
105 | endif | |
106 | ||
107 | # That's our default target when none is given on the command line | |
4f193362 | 108 | PHONY := _all |
1da177e4 LT |
109 | _all: |
110 | ||
1cacc9ab SR |
111 | # Cancel implicit rules on top Makefile |
112 | $(CURDIR)/Makefile Makefile: ; | |
113 | ||
1da177e4 LT |
114 | ifneq ($(KBUILD_OUTPUT),) |
115 | # Invoke a second make in the output directory, passing relevant variables | |
116 | # check that the output directory actually exists | |
117 | saved-output := $(KBUILD_OUTPUT) | |
118 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) | |
119 | $(if $(KBUILD_OUTPUT),, \ | |
120 | $(error output directory "$(saved-output)" does not exist)) | |
1da177e4 | 121 | |
0b35786d MM |
122 | PHONY += $(MAKECMDGOALS) sub-make |
123 | ||
1cacc9ab | 124 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
0b35786d MM |
125 | $(Q)@: |
126 | ||
127 | sub-make: FORCE | |
23a45e2c SR |
128 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ |
129 | KBUILD_SRC=$(CURDIR) \ | |
0b35786d MM |
130 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ |
131 | $(filter-out _all sub-make,$(MAKECMDGOALS)) | |
1da177e4 LT |
132 | |
133 | # Leave processing to above invocation of make | |
134 | skip-makefile := 1 | |
135 | endif # ifneq ($(KBUILD_OUTPUT),) | |
136 | endif # ifeq ($(KBUILD_SRC),) | |
137 | ||
138 | # We process the rest of the Makefile if this is the final invocation of make | |
139 | ifeq ($(skip-makefile),) | |
140 | ||
141 | # If building an external module we do not care about the all: rule | |
142 | # but instead _all depend on modules | |
4f193362 | 143 | PHONY += all |
1da177e4 LT |
144 | ifeq ($(KBUILD_EXTMOD),) |
145 | _all: all | |
146 | else | |
147 | _all: modules | |
148 | endif | |
149 | ||
150 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) | |
151 | TOPDIR := $(srctree) | |
152 | # FIXME - TOPDIR is obsolete, use srctree/objtree | |
153 | objtree := $(CURDIR) | |
154 | src := $(srctree) | |
155 | obj := $(objtree) | |
156 | ||
0f558c33 | 157 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
1da177e4 LT |
158 | |
159 | export srctree objtree VPATH TOPDIR | |
160 | ||
1da177e4 LT |
161 | |
162 | # SUBARCH tells the usermode build what the underlying arch is. That is set | |
163 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
164 | # line overrides the setting of ARCH below. If a native build is happening, | |
165 | # then ARCH is assigned, getting whatever value it gets normally, and | |
166 | # SUBARCH is subsequently ignored. | |
167 | ||
168 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ | |
169 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | |
39990b5e | 170 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
236b1957 PM |
171 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
172 | -e s/sh[234].*/sh/ ) | |
1da177e4 LT |
173 | |
174 | # Cross compiling and selecting different set of gcc/bin-utils | |
175 | # --------------------------------------------------------------------------- | |
176 | # | |
177 | # When performing cross compilation for other architectures ARCH shall be set | |
178 | # to the target architecture. (See arch/* for the possibilities). | |
179 | # ARCH can be set during invocation of make: | |
180 | # make ARCH=ia64 | |
181 | # Another way is to have ARCH set in the environment. | |
182 | # The default ARCH is the host where make is executed. | |
183 | ||
184 | # CROSS_COMPILE specify the prefix used for all executables used | |
185 | # during compilation. Only gcc and related bin-utils executables | |
186 | # are prefixed with $(CROSS_COMPILE). | |
187 | # CROSS_COMPILE can be set on the command line | |
188 | # make CROSS_COMPILE=ia64-linux- | |
189 | # Alternatively CROSS_COMPILE can be set in the environment. | |
190 | # Default value for CROSS_COMPILE is not to prefix executables | |
191 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
192 | ||
193 | ARCH ?= $(SUBARCH) | |
194 | CROSS_COMPILE ?= | |
195 | ||
196 | # Architecture as present in compile.h | |
6752ed90 TG |
197 | UTS_MACHINE := $(ARCH) |
198 | SRCARCH := $(ARCH) | |
1da177e4 | 199 | |
d746d647 SR |
200 | # Additional ARCH settings for x86 |
201 | ifeq ($(ARCH),i386) | |
202 | SRCARCH := x86 | |
203 | endif | |
204 | ifeq ($(ARCH),x86_64) | |
205 | SRCARCH := x86 | |
206 | endif | |
74b469f2 | 207 | |
14cdd3c4 RZ |
208 | KCONFIG_CONFIG ?= .config |
209 | ||
1da177e4 LT |
210 | # SHELL used by kbuild |
211 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
212 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
213 | else echo sh; fi ; fi) | |
214 | ||
070b98bf SR |
215 | HOSTCC = gcc |
216 | HOSTCXX = g++ | |
217 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | |
218 | HOSTCXXFLAGS = -O2 | |
1da177e4 | 219 | |
070b98bf SR |
220 | # Decide whether to build built-in, modular, or both. |
221 | # Normally, just do built-in. | |
1da177e4 LT |
222 | |
223 | KBUILD_MODULES := | |
224 | KBUILD_BUILTIN := 1 | |
225 | ||
226 | # If we have only "make modules", don't compile built-in objects. | |
227 | # When we're building modules with modversions, we need to consider | |
228 | # the built-in objects during the descend as well, in order to | |
070b98bf | 229 | # make sure the checksums are up to date before we record them. |
1da177e4 LT |
230 | |
231 | ifeq ($(MAKECMDGOALS),modules) | |
232 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
233 | endif | |
234 | ||
235 | # If we have "make <whatever> modules", compile modules | |
236 | # in addition to whatever we do anyway. | |
237 | # Just "make" or "make all" shall build modules as well | |
238 | ||
239 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
240 | KBUILD_MODULES := 1 | |
241 | endif | |
242 | ||
243 | ifeq ($(MAKECMDGOALS),) | |
244 | KBUILD_MODULES := 1 | |
245 | endif | |
246 | ||
e579d351 | 247 | export KBUILD_MODULES KBUILD_BUILTIN |
1da177e4 LT |
248 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
249 | ||
250 | # Beautify output | |
251 | # --------------------------------------------------------------------------- | |
252 | # | |
253 | # Normally, we echo the whole command before executing it. By making | |
254 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
255 | # $(quiet) to choose other forms of output instead, e.g. | |
256 | # | |
257 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
258 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
259 | # | |
260 | # If $(quiet) is empty, the whole command will be printed. | |
261 | # If it is set to "quiet_", only the short version will be printed. | |
070b98bf | 262 | # If it is set to "silent_", nothing will be printed at all, since |
1da177e4 LT |
263 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
264 | # | |
a58a414f | 265 | # A simple variant is to prefix commands with $(Q) - that's useful |
1da177e4 LT |
266 | # for commands that shall be hidden in non-verbose mode. |
267 | # | |
268 | # $(Q)ln $@ :< | |
269 | # | |
270 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
271 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
272 | ||
273 | ifeq ($(KBUILD_VERBOSE),1) | |
274 | quiet = | |
275 | Q = | |
276 | else | |
277 | quiet=quiet_ | |
278 | Q = @ | |
279 | endif | |
280 | ||
281 | # If the user is running make -s (silent mode), suppress echoing of | |
282 | # commands | |
283 | ||
284 | ifneq ($(findstring s,$(MAKEFLAGS)),) | |
285 | quiet=silent_ | |
286 | endif | |
287 | ||
288 | export quiet Q KBUILD_VERBOSE | |
289 | ||
1da177e4 LT |
290 | |
291 | # Look for make include files relative to root of kernel src | |
292 | MAKEFLAGS += --include-dir=$(srctree) | |
293 | ||
1cacc9ab SR |
294 | # We need some generic definitions (do not try to remake the file). |
295 | $(srctree)/scripts/Kbuild.include: ; | |
15964864 | 296 | include $(srctree)/scripts/Kbuild.include |
1da177e4 LT |
297 | |
298 | # Make variables (CC, etc...) | |
299 | ||
300 | AS = $(CROSS_COMPILE)as | |
301 | LD = $(CROSS_COMPILE)ld | |
302 | CC = $(CROSS_COMPILE)gcc | |
303 | CPP = $(CC) -E | |
304 | AR = $(CROSS_COMPILE)ar | |
305 | NM = $(CROSS_COMPILE)nm | |
306 | STRIP = $(CROSS_COMPILE)strip | |
307 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
308 | OBJDUMP = $(CROSS_COMPILE)objdump | |
309 | AWK = awk | |
310 | GENKSYMS = scripts/genksyms/genksyms | |
311 | DEPMOD = /sbin/depmod | |
312 | KALLSYMS = scripts/kallsyms | |
313 | PERL = perl | |
314 | CHECK = sparse | |
315 | ||
af4ca457 | 316 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
1da177e4 LT |
317 | MODFLAGS = -DMODULE |
318 | CFLAGS_MODULE = $(MODFLAGS) | |
319 | AFLAGS_MODULE = $(MODFLAGS) | |
114f5157 | 320 | LDFLAGS_MODULE = |
1da177e4 LT |
321 | CFLAGS_KERNEL = |
322 | AFLAGS_KERNEL = | |
323 | ||
324 | ||
325 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
326 | # Needed to be compatible with the O= option | |
327 | LINUXINCLUDE := -Iinclude \ | |
2dd34b48 | 328 | $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ |
e623a3b8 | 329 | -include include/linux/autoconf.h |
1da177e4 | 330 | |
06c5040c | 331 | KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) |
1da177e4 | 332 | |
a0f97e06 | 333 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
94bed2a9 DJ |
334 | -fno-strict-aliasing -fno-common \ |
335 | -Werror-implicit-function-declaration | |
222d394d | 336 | KBUILD_AFLAGS := -D__ASSEMBLY__ |
1da177e4 | 337 | |
f1d28fb0 RZ |
338 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
339 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
2244cbd8 | 340 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
cb58455c | 341 | |
070b98bf | 342 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
80ef88d6 | 343 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
070b98bf SR |
344 | export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE |
345 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
1da177e4 | 346 | |
06c5040c | 347 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
a0f97e06 | 348 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
222d394d | 349 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
1da177e4 LT |
350 | |
351 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
352 | # tree rather than in the kernel tree. The kernel tree might | |
353 | # even be read-only. | |
354 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
355 | ||
1da177e4 LT |
356 | # Files to ignore in find ... statements |
357 | ||
406119f4 TM |
358 | 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 |
359 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
360 | |
361 | # =========================================================================== | |
362 | # Rules shared between *config targets and build targets | |
363 | ||
364 | # Basic helpers built in scripts/ | |
4f193362 | 365 | PHONY += scripts_basic |
1da177e4 LT |
366 | scripts_basic: |
367 | $(Q)$(MAKE) $(build)=scripts/basic | |
368 | ||
cd05e6bd JB |
369 | # To avoid any implicit rule to kick in, define an empty command. |
370 | scripts/basic/%: scripts_basic ; | |
371 | ||
4f193362 | 372 | PHONY += outputmakefile |
fd5f0cd6 JB |
373 | # outputmakefile generates a Makefile in the output directory, if using a |
374 | # separate output directory. This allows convenient use of make in the | |
375 | # output directory. | |
1da177e4 | 376 | outputmakefile: |
fd5f0cd6 JB |
377 | ifneq ($(KBUILD_SRC),) |
378 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | |
379 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
380 | endif | |
1da177e4 LT |
381 | |
382 | # To make sure we do not include .config for any of the *config targets | |
383 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
384 | # It is allowed to specify more targets when calling make, including | |
385 | # mixing *config targets and build targets. | |
070b98bf | 386 | # For example 'make oldconfig all'. |
1da177e4 LT |
387 | # Detect when mixed targets is specified, and make a second invocation |
388 | # of make so .config is not included in this case either (for *config). | |
389 | ||
3eb3c740 | 390 | no-dot-config-targets := clean mrproper distclean \ |
c30a02e0 | 391 | cscope TAGS tags help %docs check% \ |
3eb3c740 RZ |
392 | include/linux/version.h headers_% \ |
393 | kernelrelease kernelversion | |
1da177e4 LT |
394 | |
395 | config-targets := 0 | |
396 | mixed-targets := 0 | |
397 | dot-config := 1 | |
398 | ||
399 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
400 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
401 | dot-config := 0 | |
402 | endif | |
403 | endif | |
404 | ||
405 | ifeq ($(KBUILD_EXTMOD),) | |
406 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
407 | config-targets := 1 | |
408 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | |
409 | mixed-targets := 1 | |
410 | endif | |
411 | endif | |
412 | endif | |
413 | ||
414 | ifeq ($(mixed-targets),1) | |
415 | # =========================================================================== | |
416 | # We're called with mixed targets (*config and build targets). | |
417 | # Handle them one by one. | |
418 | ||
419 | %:: FORCE | |
420 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | |
421 | ||
422 | else | |
423 | ifeq ($(config-targets),1) | |
424 | # =========================================================================== | |
425 | # *config targets only - make sure prerequisites are updated, and descend | |
426 | # in scripts/kconfig to make the *config target | |
427 | ||
428 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
429 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
430 | # used for 'make defconfig' | |
74b469f2 | 431 | include $(srctree)/arch/$(SRCARCH)/Makefile |
1da177e4 LT |
432 | export KBUILD_DEFCONFIG |
433 | ||
cd05e6bd | 434 | config %config: scripts_basic outputmakefile FORCE |
c955ccaf | 435 | $(Q)mkdir -p include/linux include/config |
1da177e4 LT |
436 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
437 | ||
438 | else | |
439 | # =========================================================================== | |
440 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
441 | # targets and others. In general all targets except *config targets. | |
442 | ||
443 | ifeq ($(KBUILD_EXTMOD),) | |
444 | # Additional helpers built in scripts/ | |
445 | # Carefully list dependencies so we do not try to build scripts twice | |
070b98bf | 446 | # in parallel |
4f193362 | 447 | PHONY += scripts |
2e3646e5 | 448 | scripts: scripts_basic include/config/auto.conf |
1da177e4 LT |
449 | $(Q)$(MAKE) $(build)=$(@) |
450 | ||
1da177e4 LT |
451 | # Objects we will link into vmlinux / subdirs we need to visit |
452 | init-y := init/ | |
453 | drivers-y := drivers/ sound/ | |
454 | net-y := net/ | |
455 | libs-y := lib/ | |
456 | core-y := usr/ | |
457 | endif # KBUILD_EXTMOD | |
458 | ||
459 | ifeq ($(dot-config),1) | |
9ee4e336 SR |
460 | # Read in config |
461 | -include include/config/auto.conf | |
1da177e4 | 462 | |
9ee4e336 | 463 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
464 | # Read in dependencies to all Kconfig* files, make sure to run |
465 | # oldconfig if changes are detected. | |
c955ccaf | 466 | -include include/config/auto.conf.cmd |
1da177e4 | 467 | |
1da177e4 | 468 | # To avoid any implicit rule to kick in, define an empty command |
14cdd3c4 | 469 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
1da177e4 | 470 | |
c955ccaf | 471 | # If .config is newer than include/config/auto.conf, someone tinkered |
752625cf | 472 | # with it and forgot to run make oldconfig. |
070b98bf | 473 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so |
752625cf | 474 | # we execute the config step to be sure to catch updated Kconfig files |
14cdd3c4 | 475 | include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
1da177e4 | 476 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
3041e47e | 477 | else |
9ee4e336 SR |
478 | # external modules needs include/linux/autoconf.h and include/config/auto.conf |
479 | # but do not care if they are up-to-date. Use auto.conf to trigger the test | |
480 | PHONY += include/config/auto.conf | |
481 | ||
482 | include/config/auto.conf: | |
483 | $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ | |
484 | echo; \ | |
485 | echo " ERROR: Kernel configuration is invalid."; \ | |
486 | echo " include/linux/autoconf.h or $@ are missing."; \ | |
487 | echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
488 | echo; \ | |
489 | /bin/false) | |
490 | ||
491 | endif # KBUILD_EXTMOD | |
c955ccaf | 492 | |
1da177e4 LT |
493 | else |
494 | # Dummy target needed, because used as prerequisite | |
c955ccaf | 495 | include/config/auto.conf: ; |
9ee4e336 | 496 | endif # $(dot-config) |
1da177e4 LT |
497 | |
498 | # The all: target is the default when no target is given on the | |
499 | # command line. | |
500 | # This allow a user to issue only 'make' to build a kernel including modules | |
070b98bf | 501 | # Defaults vmlinux but it is usually overridden in the arch makefile |
1da177e4 LT |
502 | all: vmlinux |
503 | ||
504 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
a0f97e06 | 505 | KBUILD_CFLAGS += -Os |
1da177e4 | 506 | else |
a0f97e06 | 507 | KBUILD_CFLAGS += -O2 |
1da177e4 LT |
508 | endif |
509 | ||
74b469f2 | 510 | include $(srctree)/arch/$(SRCARCH)/Makefile |
c9eca0b9 | 511 | |
1da177e4 | 512 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 513 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 514 | else |
a0f97e06 | 515 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 LT |
516 | endif |
517 | ||
518 | ifdef CONFIG_DEBUG_INFO | |
a0f97e06 | 519 | KBUILD_CFLAGS += -g |
222d394d | 520 | KBUILD_AFLAGS += -gdwarf-2 |
1da177e4 LT |
521 | endif |
522 | ||
c9eca0b9 | 523 | # Force gcc to behave correct even for buggy distributions |
a0f97e06 | 524 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) |
1da177e4 | 525 | |
e8e69931 | 526 | # arch Makefile may override CC so keep this after arch Makefile is included |
e8f5bdb0 | 527 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 SR |
528 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
529 | ||
1da177e4 | 530 | # warn about C99 declaration after statement |
a0f97e06 | 531 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
1da177e4 | 532 | |
070b98bf | 533 | # disable pointer signed / unsigned warnings in gcc 4.0 |
a0f97e06 | 534 | KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) |
1da177e4 | 535 | |
06c5040c | 536 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
69ee0b35 SR |
537 | # But warn user when we do so |
538 | warn-assign = \ | |
539 | $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") | |
540 | ||
541 | ifneq ($(KCPPFLAGS),) | |
542 | $(call warn-assign,CPPFLAGS) | |
543 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
544 | endif | |
545 | ifneq ($(KAFLAGS),) | |
546 | $(call warn-assign,AFLAGS) | |
547 | KBUILD_AFLAGS += $(KAFLAGS) | |
548 | endif | |
549 | ifneq ($(KCFLAGS),) | |
550 | $(call warn-assign,CFLAGS) | |
551 | KBUILD_CFLAGS += $(KCFLAGS) | |
552 | endif | |
52bcc330 | 553 | |
18991197 RM |
554 | # Use --build-id when available. |
555 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ | |
556 | $(call ld-option, -Wl$(comma)--build-id,)) | |
557 | LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) | |
558 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) | |
559 | ||
1da177e4 | 560 | # Default kernel image to build when no specific target is given. |
070b98bf | 561 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
562 | # set in the environment |
563 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
564 | # this default value | |
565 | export KBUILD_IMAGE ?= vmlinux | |
566 | ||
567 | # | |
568 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
569 | # images. Default is /boot, but you can set it to other values | |
570 | export INSTALL_PATH ?= /boot | |
571 | ||
572 | # | |
573 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
574 | # relocations required by build roots. This is not defined in the | |
070b98bf | 575 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
576 | # |
577 | ||
df9df036 | 578 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
579 | export MODLIB |
580 | ||
ac031f26 TT |
581 | # |
582 | # INSTALL_MOD_STRIP, if defined, will cause modules to be | |
583 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
584 | # the default option --strip-debug will be used. Otherwise, | |
585 | # INSTALL_MOD_STRIP will used as the options to the strip command. | |
586 | ||
587 | ifdef INSTALL_MOD_STRIP | |
588 | ifeq ($(INSTALL_MOD_STRIP),1) | |
e340221a | 589 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 TT |
590 | else |
591 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) | |
592 | endif # INSTALL_MOD_STRIP=1 | |
593 | else | |
594 | mod_strip_cmd = true | |
595 | endif # INSTALL_MOD_STRIP | |
596 | export mod_strip_cmd | |
597 | ||
1da177e4 LT |
598 | |
599 | ifeq ($(KBUILD_EXTMOD),) | |
3a65dfe8 | 600 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
601 | |
602 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
603 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
604 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | |
605 | ||
606 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
607 | $(init-n) $(init-) \ | |
608 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ | |
609 | $(net-n) $(net-) $(libs-n) $(libs-)))) | |
610 | ||
611 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
612 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
613 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
614 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
615 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
616 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
617 | libs-y := $(libs-y1) $(libs-y2) | |
618 | ||
619 | # Build vmlinux | |
620 | # --------------------------------------------------------------------------- | |
070b98bf | 621 | # vmlinux is built from the objects selected by $(vmlinux-init) and |
1da177e4 | 622 | # $(vmlinux-main). Most are built-in.o files from top-level directories |
2462566f | 623 | # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. |
1da177e4 LT |
624 | # Ordering when linking is important, and $(vmlinux-init) must be first. |
625 | # | |
626 | # vmlinux | |
627 | # ^ | |
628 | # | | |
629 | # +-< $(vmlinux-init) | |
630 | # | +--< init/version.o + more | |
631 | # | | |
632 | # +--< $(vmlinux-main) | |
633 | # | +--< driver/built-in.o mm/built-in.o + more | |
634 | # | | |
635 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | |
636 | # | |
637 | # vmlinux version (uname -v) cannot be updated during normal | |
638 | # descending-into-subdirs phase since we do not yet know if we need to | |
639 | # update vmlinux. | |
640 | # Therefore this step is delayed until just before final link of vmlinux - | |
641 | # except in the kallsyms case where it is done just before adding the | |
642 | # symbols to the kernel. | |
643 | # | |
644 | # System.map is generated to document addresses of all kernel symbols | |
645 | ||
646 | vmlinux-init := $(head-y) $(init-y) | |
647 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) | |
648 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) | |
6752ed90 | 649 | vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds |
85bd2fdd | 650 | export KBUILD_VMLINUX_OBJS := $(vmlinux-all) |
1da177e4 LT |
651 | |
652 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS | |
653 | # May be overridden by arch/$(ARCH)/Makefile | |
654 | quiet_cmd_vmlinux__ ?= LD $@ | |
655 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ | |
656 | -T $(vmlinux-lds) $(vmlinux-init) \ | |
657 | --start-group $(vmlinux-main) --end-group \ | |
741f98fe | 658 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) |
1da177e4 LT |
659 | |
660 | # Generate new vmlinux version | |
661 | quiet_cmd_vmlinux_version = GEN .version | |
662 | cmd_vmlinux_version = set -e; \ | |
4e25d8bb JB |
663 | if [ ! -r .version ]; then \ |
664 | rm -f .version; \ | |
665 | echo 1 >.version; \ | |
666 | else \ | |
667 | mv .version .old_version; \ | |
668 | expr 0$$(cat .old_version) + 1 >.version; \ | |
669 | fi; \ | |
1da177e4 LT |
670 | $(MAKE) $(build)=init |
671 | ||
672 | # Generate System.map | |
070b98bf | 673 | quiet_cmd_sysmap = SYSMAP |
1da177e4 LT |
674 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
675 | ||
676 | # Link of vmlinux | |
677 | # If CONFIG_KALLSYMS is set .version is already updated | |
678 | # Generate System.map and verify that the content is consistent | |
39ca371c MR |
679 | # Use + in front of the vmlinux_version rule to silent warning with make -j2 |
680 | # First command is ':' to allow us to use + in front of the rule | |
1da177e4 | 681 | define rule_vmlinux__ |
39ca371c | 682 | : |
1da177e4 LT |
683 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) |
684 | ||
685 | $(call cmd,vmlinux__) | |
686 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
687 | ||
4635281c SR |
688 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
689 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ | |
690 | $(cmd_sysmap) $@ System.map; \ | |
691 | if [ $$? -ne 0 ]; then \ | |
692 | rm -f $@; \ | |
693 | /bin/false; \ | |
1da177e4 LT |
694 | fi; |
695 | $(verify_kallsyms) | |
696 | endef | |
697 | ||
698 | ||
699 | ifdef CONFIG_KALLSYMS | |
700 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) | |
701 | # It's a three stage process: | |
702 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is | |
703 | # empty | |
704 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
705 | # the right size - vmlinux version (uname -v) is updated during this step | |
706 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, | |
707 | # but due to the added section, some addresses have shifted. | |
708 | # From here, we generate a correct .tmp_kallsyms2.o | |
709 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. | |
710 | # o Verify that the System.map from vmlinux matches the map from | |
711 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. | |
712 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | |
713 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a | |
714 | # temporary bypass to allow the kernel to be built while the | |
715 | # maintainers work out what went wrong with kallsyms. | |
716 | ||
717 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | |
718 | last_kallsyms := 3 | |
719 | else | |
720 | last_kallsyms := 2 | |
721 | endif | |
722 | ||
723 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | |
724 | ||
725 | define verify_kallsyms | |
4635281c SR |
726 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
727 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | |
1da177e4 | 728 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map |
4635281c SR |
729 | $(Q)cmp -s System.map .tmp_System.map || \ |
730 | (echo Inconsistent kallsyms data; \ | |
731 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | |
1da177e4 LT |
732 | rm .tmp_kallsyms* ; /bin/false ) |
733 | endef | |
734 | ||
735 | # Update vmlinux version before link | |
736 | # Use + in front of this rule to silent warning about make -j1 | |
72ba47c1 | 737 | # First command is ':' to allow us to use + in front of this rule |
1da177e4 LT |
738 | cmd_ksym_ld = $(cmd_vmlinux__) |
739 | define rule_ksym_ld | |
72ba47c1 | 740 | : |
1da177e4 LT |
741 | +$(call cmd,vmlinux_version) |
742 | $(call cmd,vmlinux__) | |
743 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
744 | endef | |
745 | ||
746 | # Generate .S file with all kernel symbols | |
747 | quiet_cmd_kallsyms = KSYM $@ | |
748 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ | |
749 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | |
750 | ||
751 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE | |
752 | $(call if_changed_dep,as_o_S) | |
753 | ||
754 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) | |
755 | $(call cmd,kallsyms) | |
756 | ||
757 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version | |
758 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE | |
759 | $(call if_changed_rule,ksym_ld) | |
760 | ||
761 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE | |
762 | $(call if_changed,vmlinux__) | |
763 | ||
764 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE | |
765 | $(call if_changed,vmlinux__) | |
766 | ||
767 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | |
768 | $(KALLSYMS): scripts ; | |
769 | ||
33bc25ea SR |
770 | # Generate some data for debugging strange kallsyms problems |
771 | debug_kallsyms: .tmp_map$(last_kallsyms) | |
772 | ||
773 | .tmp_map%: .tmp_vmlinux% FORCE | |
774 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ | |
775 | ||
776 | .tmp_map3: .tmp_map2 | |
777 | ||
778 | .tmp_map2: .tmp_map1 | |
779 | ||
1da177e4 LT |
780 | endif # ifdef CONFIG_KALLSYMS |
781 | ||
741f98fe SR |
782 | # Do modpost on a prelinked vmlinux. The finally linked vmlinux has |
783 | # relevant sections renamed as per the linker script. | |
784 | quiet_cmd_vmlinux-modpost = LD $@ | |
785 | cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ | |
786 | $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ | |
787 | $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^) | |
788 | define rule_vmlinux-modpost | |
789 | : | |
790 | +$(call cmd,vmlinux-modpost) | |
791 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ | |
792 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd | |
793 | endef | |
794 | ||
1da177e4 | 795 | # vmlinux image - including updated kernel symbols |
741f98fe | 796 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE |
0f836e5f | 797 | ifdef CONFIG_HEADERS_CHECK |
0e7af8d0 | 798 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
267c4025 MD |
799 | endif |
800 | ifdef CONFIG_SAMPLES | |
801 | $(Q)$(MAKE) $(build)=samples | |
0f836e5f | 802 | endif |
741f98fe | 803 | $(call vmlinux-modpost) |
1da177e4 | 804 | $(call if_changed_rule,vmlinux__) |
4e25d8bb | 805 | $(Q)rm -f .old_version |
1da177e4 | 806 | |
741f98fe SR |
807 | vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE |
808 | $(call if_changed_rule,vmlinux-modpost) | |
809 | ||
1da177e4 LT |
810 | # The actual objects are generated when descending, |
811 | # make sure no implicit rule kicks in | |
812 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; | |
813 | ||
814 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
815 | # Preset locale variables to speed up the build process. Limit locale | |
816 | # tweaks to this spot to avoid wrong language settings when running | |
817 | # make menuconfig etc. | |
818 | # Error messages still appears in the original language | |
819 | ||
4f193362 | 820 | PHONY += $(vmlinux-dirs) |
5bb78269 | 821 | $(vmlinux-dirs): prepare scripts |
1da177e4 LT |
822 | $(Q)$(MAKE) $(build)=$@ |
823 | ||
cb58455c | 824 | # Build the kernel release string |
cb58455c | 825 | # |
1ef98856 RD |
826 | # The KERNELRELEASE value built here is stored in the file |
827 | # include/config/kernel.release, and is used when executing several | |
828 | # make targets, such as "make install" or "make modules_install." | |
829 | # | |
830 | # The eventual kernel release string consists of the following fields, | |
831 | # shown in a hierarchical format to show how smaller parts are concatenated | |
832 | # to form the larger and final value, with values coming from places like | |
833 | # the Makefile, kernel config options, make command line options and/or | |
834 | # SCM tag information. | |
835 | # | |
836 | # $(KERNELVERSION) | |
837 | # $(VERSION) eg, 2 | |
838 | # $(PATCHLEVEL) eg, 6 | |
839 | # $(SUBLEVEL) eg, 18 | |
840 | # $(EXTRAVERSION) eg, -rc6 | |
841 | # $(localver-full) | |
842 | # $(localver) | |
76c32956 | 843 | # localversion* (files without backups, containing '~') |
1ef98856 RD |
844 | # $(CONFIG_LOCALVERSION) (from kernel config setting) |
845 | # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) | |
846 | # ./scripts/setlocalversion (SCM tag, if one exists) | |
847 | # $(LOCALVERSION) (from make command line if provided) | |
848 | # | |
849 | # Note how the final $(localver-auto) string is included *only* if the | |
850 | # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the | |
851 | # moment, only git is supported but other SCMs can edit the script | |
852 | # scripts/setlocalversion and add the appropriate checks as needed. | |
cb58455c | 853 | |
76c32956 OV |
854 | pattern = ".*/localversion[^~]*" |
855 | string = $(shell cat /dev/null \ | |
fd19e44f | 856 | `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) |
cb58455c | 857 | |
76c32956 OV |
858 | localver = $(subst $(space),, $(string) \ |
859 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | |
070b98bf | 860 | |
cb58455c SR |
861 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
862 | # and if the SCM is know a tag from the SCM is appended. | |
070b98bf | 863 | # The appended tag is determined by the SCM used. |
cb58455c SR |
864 | # |
865 | # Currently, only git is supported. | |
866 | # Other SCMs can edit scripts/setlocalversion and add the appropriate | |
867 | # checks as needed. | |
868 | ifdef CONFIG_LOCALVERSION_AUTO | |
869 | _localver-auto = $(shell $(CONFIG_SHELL) \ | |
870 | $(srctree)/scripts/setlocalversion $(srctree)) | |
871 | localver-auto = $(LOCALVERSION)$(_localver-auto) | |
872 | endif | |
873 | ||
874 | localver-full = $(localver)$(localver-auto) | |
875 | ||
f1d28fb0 | 876 | # Store (new) KERNELRELASE string in include/config/kernel.release |
2244cbd8 | 877 | kernelrelease = $(KERNELVERSION)$(localver-full) |
f1d28fb0 | 878 | include/config/kernel.release: include/config/auto.conf FORCE |
2244cbd8 SR |
879 | $(Q)rm -f $@ |
880 | $(Q)echo $(kernelrelease) > $@ | |
cb58455c SR |
881 | |
882 | ||
1da177e4 | 883 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
884 | # or the modules are listed in "prepare". |
885 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
886 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
887 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 888 | |
5bb78269 | 889 | # Listed in dependency order |
4f193362 | 890 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
5bb78269 | 891 | |
86feeaa8 | 892 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
893 | # and if so do: |
894 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
895 | # 2) Create the include2 directory, used for the second asm symlink | |
f1d28fb0 | 896 | prepare3: include/config/kernel.release |
1da177e4 LT |
897 | ifneq ($(KBUILD_SRC),) |
898 | @echo ' Using $(srctree) as source for kernel' | |
c955ccaf | 899 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
1da177e4 LT |
900 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
901 | echo " in the '$(srctree)' directory.";\ | |
902 | /bin/false; \ | |
903 | fi; | |
904 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; | |
96a388de | 905 | $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm |
1da177e4 LT |
906 | endif |
907 | ||
86feeaa8 SR |
908 | # prepare2 creates a makefile if using a separate output directory |
909 | prepare2: prepare3 outputmakefile | |
1da177e4 | 910 | |
3eb3c740 RZ |
911 | prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ |
912 | include/asm include/config/auto.conf | |
7bb9d092 | 913 | $(cmd_crmodverdir) |
1da177e4 | 914 | |
5bb78269 SR |
915 | archprepare: prepare1 scripts_basic |
916 | ||
917 | prepare0: archprepare FORCE | |
8d36a623 | 918 | $(Q)$(MAKE) $(build)=. |
c53aeca0 | 919 | $(Q)$(MAKE) $(build)=. missing-syscalls |
86feeaa8 | 920 | |
1da177e4 | 921 | # All the preparing.. |
d395efb5 | 922 | prepare: prepare0 |
1da177e4 | 923 | |
070b98bf SR |
924 | # Leave this as default for preprocessing vmlinux.lds.S, which is now |
925 | # done in arch/$(ARCH)/kernel/Makefile | |
1da177e4 LT |
926 | |
927 | export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) | |
928 | ||
fc333b2d SR |
929 | # The asm symlink changes when $(ARCH) changes. |
930 | # Detect this and ask user to run make mrproper | |
931 | ||
932 | include/asm: FORCE | |
933 | $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \ | |
934 | if [ -L include/asm ]; then \ | |
935 | if [ "$$asmlink" != "$(SRCARCH)" ]; then \ | |
936 | echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ | |
937 | echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ | |
938 | exit 1; \ | |
939 | fi; \ | |
940 | else \ | |
941 | echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ | |
942 | if [ ! -d include ]; then \ | |
943 | mkdir -p include; \ | |
944 | fi; \ | |
945 | ln -fsn asm-$(SRCARCH) $@; \ | |
946 | fi | |
1da177e4 | 947 | |
1da177e4 LT |
948 | # Generate some files |
949 | # --------------------------------------------------------------------------- | |
950 | ||
951 | # KERNELRELEASE can change from a few different places, meaning version.h | |
952 | # needs to be updated, so this check is forced on all builds | |
953 | ||
954 | uts_len := 64 | |
63104eec SR |
955 | define filechk_utsrelease.h |
956 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
957 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
958 | exit 1; \ | |
959 | fi; \ | |
960 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
961 | endef | |
1da177e4 LT |
962 | |
963 | define filechk_version.h | |
63104eec SR |
964 | (echo \#define LINUX_VERSION_CODE $(shell \ |
965 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ | |
966 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) | |
1da177e4 LT |
967 | endef |
968 | ||
63104eec | 969 | include/linux/version.h: $(srctree)/Makefile FORCE |
1da177e4 LT |
970 | $(call filechk,version.h) |
971 | ||
63104eec SR |
972 | include/linux/utsrelease.h: include/config/kernel.release FORCE |
973 | $(call filechk,utsrelease.h) | |
974 | ||
1da177e4 LT |
975 | # --------------------------------------------------------------------------- |
976 | ||
4f193362 | 977 | PHONY += depend dep |
1da177e4 LT |
978 | depend dep: |
979 | @echo '*** Warning: make $@ is unnecessary now.' | |
980 | ||
8d730cfb DW |
981 | # --------------------------------------------------------------------------- |
982 | # Kernel headers | |
1ab7a1f3 | 983 | INSTALL_HDR_PATH=$(objtree)/usr |
8d730cfb DW |
984 | export INSTALL_HDR_PATH |
985 | ||
96a388de TG |
986 | HDRFILTER=generic i386 x86_64 |
987 | HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) | |
6d716275 DW |
988 | |
989 | PHONY += headers_install_all | |
3eb3c740 | 990 | headers_install_all: include/linux/version.h scripts_basic FORCE |
398477d4 | 991 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef |
6d716275 | 992 | $(Q)for arch in $(HDRARCHES); do \ |
398477d4 | 993 | $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ |
6d716275 DW |
994 | done |
995 | ||
8d730cfb | 996 | PHONY += headers_install |
3eb3c740 | 997 | headers_install: include/linux/version.h scripts_basic FORCE |
96a388de TG |
998 | @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ |
999 | echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \ | |
f17b7bad | 1000 | exit 1 ; fi |
07aea3a7 | 1001 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef |
96a388de | 1002 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include |
8d730cfb | 1003 | |
1f85712e MF |
1004 | PHONY += headers_check_all |
1005 | headers_check_all: headers_install_all | |
1006 | $(Q)for arch in $(HDRARCHES); do \ | |
1007 | $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\ | |
1008 | done | |
1009 | ||
68475359 DW |
1010 | PHONY += headers_check |
1011 | headers_check: headers_install | |
96a388de | 1012 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1 |
68475359 | 1013 | |
1da177e4 LT |
1014 | # --------------------------------------------------------------------------- |
1015 | # Modules | |
1016 | ||
1017 | ifdef CONFIG_MODULES | |
1018 | ||
070b98bf | 1019 | # By default, build modules as well |
1da177e4 LT |
1020 | |
1021 | all: modules | |
1022 | ||
1023 | # Build modules | |
1024 | ||
4f193362 | 1025 | PHONY += modules |
1da177e4 LT |
1026 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) |
1027 | @echo ' Building modules, stage 2.'; | |
b805aa0e | 1028 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 LT |
1029 | |
1030 | ||
1031 | # Target to prepare building external modules | |
4f193362 | 1032 | PHONY += modules_prepare |
5bb78269 | 1033 | modules_prepare: prepare scripts |
1da177e4 LT |
1034 | |
1035 | # Target to install modules | |
4f193362 | 1036 | PHONY += modules_install |
1da177e4 LT |
1037 | modules_install: _modinst_ _modinst_post |
1038 | ||
4f193362 | 1039 | PHONY += _modinst_ |
1da177e4 | 1040 | _modinst_: |
ce454d4d | 1041 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
1da177e4 LT |
1042 | echo "Warning: you may need to install module-init-tools"; \ |
1043 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | |
1044 | sleep 1; \ | |
1045 | fi | |
1046 | @rm -rf $(MODLIB)/kernel | |
1047 | @rm -f $(MODLIB)/source | |
1048 | @mkdir -p $(MODLIB)/kernel | |
1049 | @ln -s $(srctree) $(MODLIB)/source | |
1050 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1051 | rm -f $(MODLIB)/build ; \ | |
1052 | ln -s $(objtree) $(MODLIB)/build ; \ | |
1053 | fi | |
b805aa0e | 1054 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1055 | |
50a8ec31 | 1056 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1057 | # boot a modules.dep even before / is mounted read-write. However the |
1058 | # boot script depmod is the master version. | |
4f193362 | 1059 | PHONY += _modinst_post |
1da177e4 | 1060 | _modinst_post: _modinst_ |
50a8ec31 | 1061 | $(call cmd,depmod) |
1da177e4 LT |
1062 | |
1063 | else # CONFIG_MODULES | |
1064 | ||
1065 | # Modules not configured | |
1066 | # --------------------------------------------------------------------------- | |
1067 | ||
1068 | modules modules_install: FORCE | |
1069 | @echo | |
1070 | @echo "The present kernel configuration has modules disabled." | |
1071 | @echo "Type 'make config' and enable loadable module support." | |
1072 | @echo "Then build a kernel with module support enabled." | |
1073 | @echo | |
1074 | @exit 1 | |
1075 | ||
1076 | endif # CONFIG_MODULES | |
1077 | ||
1da177e4 LT |
1078 | ### |
1079 | # Cleaning is done on three levels. | |
1080 | # make clean Delete most generated files | |
1081 | # Leave enough to build external modules | |
1082 | # make mrproper Delete the current configuration, and all generated files | |
1083 | # make distclean Remove editor backup files, patch leftover files and the like | |
1084 | ||
1085 | # Directories & files removed with 'make clean' | |
1086 | CLEAN_DIRS += $(MODVERDIR) | |
1087 | CLEAN_FILES += vmlinux System.map \ | |
1088 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map | |
1089 | ||
1090 | # Directories & files removed with 'make mrproper' | |
1ab7a1f3 | 1091 | MRPROPER_DIRS += include/config include2 usr/include |
50aa88e2 | 1092 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
3eb3c740 RZ |
1093 | include/linux/autoconf.h include/linux/version.h \ |
1094 | include/linux/utsrelease.h \ | |
f1d28fb0 | 1095 | Module.symvers tags TAGS cscope* |
1da177e4 LT |
1096 | |
1097 | # clean - Delete most, but leave enough to build external modules | |
1098 | # | |
1099 | clean: rm-dirs := $(CLEAN_DIRS) | |
1100 | clean: rm-files := $(CLEAN_FILES) | |
86feeaa8 | 1101 | clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) |
1da177e4 | 1102 | |
4f193362 | 1103 | PHONY += $(clean-dirs) clean archclean |
1da177e4 LT |
1104 | $(clean-dirs): |
1105 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1106 | ||
1107 | clean: archclean $(clean-dirs) | |
1108 | $(call cmd,rmdirs) | |
1109 | $(call cmd,rmfiles) | |
1110 | @find . $(RCS_FIND_IGNORE) \ | |
070b98bf | 1111 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
15fde675 AG |
1112 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
1113 | -o -name '*.symtypes' \) \ | |
1da177e4 LT |
1114 | -type f -print | xargs rm -f |
1115 | ||
1116 | # mrproper - Delete all generated files, including .config | |
1117 | # | |
1118 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1119 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1120 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1121 | ||
4f193362 | 1122 | PHONY += $(mrproper-dirs) mrproper archmrproper |
1da177e4 LT |
1123 | $(mrproper-dirs): |
1124 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1125 | ||
1126 | mrproper: clean archmrproper $(mrproper-dirs) | |
1127 | $(call cmd,rmdirs) | |
1128 | $(call cmd,rmfiles) | |
1129 | ||
1130 | # distclean | |
1131 | # | |
4f193362 | 1132 | PHONY += distclean |
1da177e4 LT |
1133 | |
1134 | distclean: mrproper | |
1135 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1136 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
1da177e4 | 1137 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
070b98bf | 1138 | -o -name '.*.rej' -o -size 0 \ |
1da177e4 LT |
1139 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
1140 | -type f -print | xargs rm -f | |
1141 | ||
1142 | ||
1143 | # Packaging of the kernel to various formats | |
1144 | # --------------------------------------------------------------------------- | |
1145 | # rpm target kept for backward compatibility | |
1146 | package-dir := $(srctree)/scripts/package | |
1147 | ||
031ecc6d | 1148 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1149 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
031ecc6d | 1150 | rpm: include/config/kernel.release FORCE |
6c2133e1 | 1151 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1152 | |
1153 | ||
1154 | # Brief documentation of the typical targets used | |
1155 | # --------------------------------------------------------------------------- | |
1156 | ||
1157 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) | |
1158 | boards := $(notdir $(boards)) | |
1159 | ||
1160 | help: | |
1161 | @echo 'Cleaning targets:' | |
5ea084ef | 1162 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1163 | @echo ' enough build support to build external modules' |
5ea084ef | 1164 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1165 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1166 | @echo '' |
1167 | @echo 'Configuration targets:' | |
1168 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1169 | @echo '' | |
1170 | @echo 'Other generic targets:' | |
1171 | @echo ' all - Build all targets marked with [*]' | |
1172 | @echo '* vmlinux - Build the bare kernel' | |
1173 | @echo '* modules - Build all modules' | |
9cc5d74c | 1174 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 LT |
1175 | @echo ' dir/ - Build all files in dir and below' |
1176 | @echo ' dir/file.[ois] - Build specified target only' | |
155ad605 | 1177 | @echo ' dir/file.ko - Build module including final link' |
1da177e4 LT |
1178 | @echo ' rpm - Build a kernel as an RPM package' |
1179 | @echo ' tags/TAGS - Generate tags file for editors' | |
1180 | @echo ' cscope - Generate cscope index' | |
6d128842 | 1181 | @echo ' kernelrelease - Output the release version string' |
cb58455c | 1182 | @echo ' kernelversion - Output the version stored in Makefile' |
91e034ef | 1183 | @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ |
f17b7bad | 1184 | echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1185 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
f17b7bad | 1186 | fi |
1da177e4 LT |
1187 | @echo '' |
1188 | @echo 'Static analysers' | |
1da177e4 LT |
1189 | @echo ' checkstack - Generate a list of stack hogs' |
1190 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
295ac051 | 1191 | @echo ' export_report - List the usages of all exported symbols' |
91e034ef | 1192 | @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ |
f17b7bad DW |
1193 | echo ' headers_check - Sanity check on exported headers'; \ |
1194 | fi | |
1da177e4 LT |
1195 | @echo '' |
1196 | @echo 'Kernel packaging:' | |
6c2133e1 | 1197 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1198 | @echo '' |
1199 | @echo 'Documentation targets:' | |
1200 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1201 | @echo '' | |
1202 | @echo 'Architecture specific targets ($(ARCH)):' | |
1203 | @$(if $(archhelp),$(archhelp),\ | |
1204 | echo ' No architecture specific help defined for $(ARCH)') | |
1205 | @echo '' | |
1206 | @$(if $(boards), \ | |
1207 | $(foreach b, $(boards), \ | |
1208 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1209 | echo '') | |
1210 | ||
1211 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1212 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1213 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
701842e3 DK |
1214 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' |
1215 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1da177e4 LT |
1216 | @echo '' |
1217 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1218 | @echo 'For further info see the ./README file' | |
1219 | ||
1220 | ||
1221 | # Documentation targets | |
1222 | # --------------------------------------------------------------------------- | |
1223 | %docs: scripts_basic FORCE | |
1224 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | |
1225 | ||
1226 | else # KBUILD_EXTMOD | |
1227 | ||
1228 | ### | |
1229 | # External module support. | |
1230 | # When building external modules the kernel used as basis is considered | |
1231 | # read-only, and no consistency checks are made and the make | |
1232 | # system is not used on the basis kernel. If updates are required | |
1233 | # in the basis kernel ordinary make commands (without M=...) must | |
1234 | # be used. | |
1235 | # | |
1236 | # The following are the only valid targets when building external | |
1237 | # modules. | |
1238 | # make M=dir clean Delete all automatically generated files | |
1239 | # make M=dir modules Make all modules in specified dir | |
1240 | # make M=dir Same as 'make M=dir modules' | |
1241 | # make M=dir modules_install | |
070b98bf | 1242 | # Install the modules built in the module directory |
1da177e4 LT |
1243 | # Assumes install directory is already created |
1244 | ||
1245 | # We are always building modules | |
1246 | KBUILD_MODULES := 1 | |
4f193362 | 1247 | PHONY += crmodverdir |
1da177e4 | 1248 | crmodverdir: |
7bb9d092 | 1249 | $(cmd_crmodverdir) |
1da177e4 | 1250 | |
4f193362 | 1251 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1252 | $(objtree)/Module.symvers: |
1253 | @test -e $(objtree)/Module.symvers || ( \ | |
1254 | echo; \ | |
1255 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1256 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1257 | echo ) | |
1258 | ||
1259 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1260 | PHONY += $(module-dirs) modules |
1da177e4 LT |
1261 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1262 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1263 | ||
1264 | modules: $(module-dirs) | |
1265 | @echo ' Building modules, stage 2.'; | |
b805aa0e | 1266 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1267 | |
4f193362 | 1268 | PHONY += modules_install |
a67dc21a | 1269 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1270 | |
4f193362 PS |
1271 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1272 | PHONY += _emodinst_ | |
a67dc21a | 1273 | _emodinst_: |
a67dc21a | 1274 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1275 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1276 | |
4f193362 | 1277 | PHONY += _emodinst_post |
a67dc21a SR |
1278 | _emodinst_post: _emodinst_ |
1279 | $(call cmd,depmod) | |
1280 | ||
1da177e4 LT |
1281 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1282 | ||
4f193362 | 1283 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1284 | $(clean-dirs): |
1285 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1286 | ||
1287 | clean: rm-dirs := $(MODVERDIR) | |
c34114f4 | 1288 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 LT |
1289 | clean: $(clean-dirs) |
1290 | $(call cmd,rmdirs) | |
c34114f4 | 1291 | $(call cmd,rmfiles) |
1da177e4 | 1292 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ |
070b98bf | 1293 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
1da177e4 LT |
1294 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
1295 | -type f -print | xargs rm -f | |
1296 | ||
1297 | help: | |
1298 | @echo ' Building external modules.' | |
1299 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1300 | @echo '' | |
1301 | @echo ' modules - default target, build the module(s)' | |
1302 | @echo ' modules_install - install the module' | |
1303 | @echo ' clean - remove generated files in module directory only' | |
1304 | @echo '' | |
06300b21 SR |
1305 | |
1306 | # Dummies... | |
4f193362 | 1307 | PHONY += prepare scripts |
06300b21 SR |
1308 | prepare: ; |
1309 | scripts: ; | |
1da177e4 LT |
1310 | endif # KBUILD_EXTMOD |
1311 | ||
1312 | # Generate tags for editors | |
1313 | # --------------------------------------------------------------------------- | |
1314 | ||
1315 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set | |
1316 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. | |
1317 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! | |
1318 | ||
f182ae62 | 1319 | ifeq ($(src),$(obj)) |
1da177e4 LT |
1320 | __srctree = |
1321 | else | |
1322 | __srctree = $(srctree)/ | |
1323 | endif | |
1324 | ||
2ab23c95 PBG |
1325 | ifeq ($(ALLSOURCE_ARCHS),) |
1326 | ifeq ($(ARCH),um) | |
1327 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) | |
1328 | else | |
2eb4c950 | 1329 | ALLINCLUDE_ARCHS := $(SRCARCH) |
2ab23c95 PBG |
1330 | endif |
1331 | else | |
070b98bf | 1332 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. |
2ab23c95 PBG |
1333 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) |
1334 | endif | |
1335 | ||
d0974b11 | 1336 | ALLSOURCE_ARCHS := $(SRCARCH) |
a0674e88 | 1337 | |
e838db68 | 1338 | define find-sources |
f8bea58b YL |
1339 | ( for arch in $(ALLSOURCE_ARCHS) ; do \ |
1340 | find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ | |
e838db68 | 1341 | -name $1 -print; \ |
a0674e88 | 1342 | done ; \ |
1da177e4 | 1343 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ |
e838db68 | 1344 | -name $1 -print; \ |
1da177e4 LT |
1345 | find $(__srctree)include $(RCS_FIND_IGNORE) \ |
1346 | \( -name config -o -name 'asm-*' \) -prune \ | |
e838db68 | 1347 | -o -name $1 -print; \ |
f8bea58b YL |
1348 | for arch in $(ALLINCLUDE_ARCHS) ; do \ |
1349 | find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ | |
e838db68 | 1350 | -name $1 -print; \ |
a0674e88 | 1351 | done ; \ |
1da177e4 | 1352 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ |
dd7e54ad DM |
1353 | -name $1 -print; \ |
1354 | find $(__srctree) $(RCS_FIND_IGNORE) \ | |
37ab7a26 | 1355 | \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ |
dd7e54ad DM |
1356 | -name $1 -print; \ |
1357 | ) | |
e838db68 MY |
1358 | endef |
1359 | ||
1360 | define all-sources | |
1361 | $(call find-sources,'*.[chS]') | |
1362 | endef | |
1363 | define all-kconfigs | |
1364 | $(call find-sources,'Kconfig*') | |
1365 | endef | |
1366 | define all-defconfigs | |
1367 | $(call find-sources,'defconfig') | |
1da177e4 LT |
1368 | endef |
1369 | ||
da7c0408 AG |
1370 | define xtags |
1371 | if $1 --version 2>&1 | grep -iq exuberant; then \ | |
1372 | $(all-sources) | xargs $1 -a \ | |
1373 | -I __initdata,__exitdata,__acquires,__releases \ | |
1374 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | |
91b943ee | 1375 | --extra=+f --c-kinds=+px \ |
a412c172 | 1376 | --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ |
da7c0408 AG |
1377 | $(all-kconfigs) | xargs $1 -a \ |
1378 | --langdef=kconfig \ | |
1379 | --language-force=kconfig \ | |
1380 | --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \ | |
18e39913 | 1381 | $(all-defconfigs) | xargs -r $1 -a \ |
da7c0408 AG |
1382 | --langdef=dotconfig \ |
1383 | --language-force=dotconfig \ | |
1384 | --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ | |
1385 | elif $1 --version 2>&1 | grep -iq emacs; then \ | |
1386 | $(all-sources) | xargs $1 -a; \ | |
1387 | $(all-kconfigs) | xargs $1 -a \ | |
1388 | --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ | |
18e39913 | 1389 | $(all-defconfigs) | xargs -r $1 -a \ |
da7c0408 AG |
1390 | --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ |
1391 | else \ | |
1392 | $(all-sources) | xargs $1 -a; \ | |
1393 | fi | |
1394 | endef | |
1395 | ||
1da177e4 | 1396 | quiet_cmd_cscope-file = FILELST cscope.files |
acbef459 | 1397 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
1da177e4 LT |
1398 | |
1399 | quiet_cmd_cscope = MAKE cscope.out | |
acbef459 | 1400 | cmd_cscope = cscope -b |
1da177e4 LT |
1401 | |
1402 | cscope: FORCE | |
1403 | $(call cmd,cscope-file) | |
1404 | $(call cmd,cscope) | |
1405 | ||
1406 | quiet_cmd_TAGS = MAKE $@ | |
66d609ec SR |
1407 | define cmd_TAGS |
1408 | rm -f $@; \ | |
da7c0408 | 1409 | $(call xtags,etags) |
66d609ec SR |
1410 | endef |
1411 | ||
1412 | TAGS: FORCE | |
1413 | $(call cmd,TAGS) | |
1da177e4 | 1414 | |
1da177e4 LT |
1415 | quiet_cmd_tags = MAKE $@ |
1416 | define cmd_tags | |
1417 | rm -f $@; \ | |
da7c0408 | 1418 | $(call xtags,ctags) |
1da177e4 LT |
1419 | endef |
1420 | ||
1da177e4 LT |
1421 | tags: FORCE |
1422 | $(call cmd,tags) | |
1423 | ||
1424 | ||
1425 | # Scripts to check various things for consistency | |
1426 | # --------------------------------------------------------------------------- | |
1427 | ||
1da177e4 LT |
1428 | includecheck: |
1429 | find * $(RCS_FIND_IGNORE) \ | |
1430 | -name '*.[hcS]' -type f -print | sort \ | |
1431 | | xargs $(PERL) -w scripts/checkincludes.pl | |
1432 | ||
1433 | versioncheck: | |
1434 | find * $(RCS_FIND_IGNORE) \ | |
1435 | -name '*.[hcS]' -type f -print | sort \ | |
1436 | | xargs $(PERL) -w scripts/checkversion.pl | |
1437 | ||
1da177e4 LT |
1438 | namespacecheck: |
1439 | $(PERL) $(srctree)/scripts/namespace.pl | |
1440 | ||
295ac051 AB |
1441 | export_report: |
1442 | $(PERL) $(srctree)/scripts/export_report.pl | |
1443 | ||
1da177e4 LT |
1444 | endif #ifeq ($(config-targets),1) |
1445 | endif #ifeq ($(mixed-targets),1) | |
1446 | ||
c30a02e0 | 1447 | PHONY += checkstack kernelrelease kernelversion |
e3ccf6e3 | 1448 | |
011e3a9a JD |
1449 | # UML needs a little special treatment here. It wants to use the host |
1450 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1451 | # else wants $(ARCH), including people doing cross-builds, which means | |
1452 | # that $(SUBARCH) doesn't work here. | |
1453 | ifeq ($(ARCH), um) | |
1454 | CHECKSTACK_ARCH := $(SUBARCH) | |
1455 | else | |
1456 | CHECKSTACK_ARCH := $(ARCH) | |
1457 | endif | |
1da177e4 LT |
1458 | checkstack: |
1459 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1460 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 LT |
1461 | |
1462 | kernelrelease: | |
f1d28fb0 RZ |
1463 | $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ |
1464 | $(error kernelrelease not valid - run 'make prepare' to update it)) | |
cb58455c | 1465 | kernelversion: |
2244cbd8 | 1466 | @echo $(KERNELVERSION) |
1da177e4 | 1467 | |
06300b21 SR |
1468 | # Single targets |
1469 | # --------------------------------------------------------------------------- | |
bc2546a6 SR |
1470 | # Single targets are compatible with: |
1471 | # - build whith mixed source and output | |
1472 | # - build with separate output dir 'make O=...' | |
1473 | # - external modules | |
1474 | # | |
1475 | # target-dir => where to store outputfile | |
1476 | # build-dir => directory in kernel source tree to use | |
1477 | ||
1478 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1479 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1480 | target-dir = $(dir $@) |
1481 | else | |
1482 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1483 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1484 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1485 | endif | |
1486 | ||
f6ecebd6 | 1487 | %.s: %.c prepare scripts FORCE |
bc2546a6 | 1488 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1489 | %.i: %.c prepare scripts FORCE |
bc2546a6 | 1490 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1491 | %.o: %.c prepare scripts FORCE |
bc2546a6 | 1492 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1493 | %.lst: %.c prepare scripts FORCE |
bc2546a6 | 1494 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1495 | %.s: %.S prepare scripts FORCE |
bc2546a6 | 1496 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1497 | %.o: %.S prepare scripts FORCE |
bc2546a6 | 1498 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
15fde675 AG |
1499 | %.symtypes: %.c prepare scripts FORCE |
1500 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
06300b21 | 1501 | |
bc2546a6 SR |
1502 | # Modules |
1503 | / %/: prepare scripts FORCE | |
7bb9d092 | 1504 | $(cmd_crmodverdir) |
06300b21 | 1505 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 SR |
1506 | $(build)=$(build-dir) |
1507 | %.ko: prepare scripts FORCE | |
7bb9d092 | 1508 | $(cmd_crmodverdir) |
06300b21 | 1509 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1510 | $(build)=$(build-dir) $(@:.ko=.o) |
b805aa0e | 1511 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
06300b21 | 1512 | |
1da177e4 LT |
1513 | # FIXME Should go into a make.lib or something |
1514 | # =========================================================================== | |
1515 | ||
1516 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1517 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1518 | ||
1519 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1520 | cmd_rmfiles = rm -f $(rm-files) | |
1521 | ||
50a8ec31 SR |
1522 | # Run depmod only is we have System.map and depmod is executable |
1523 | # and we build for the host arch | |
1524 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) | |
1525 | cmd_depmod = \ | |
d8d2e78a | 1526 | if [ -r System.map -a -x $(DEPMOD) ]; then \ |
50a8ec31 SR |
1527 | $(DEPMOD) -ae -F System.map \ |
1528 | $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ | |
1529 | $(KERNELRELEASE); \ | |
1530 | fi | |
1531 | ||
7bb9d092 | 1532 | # Create temporary dir for module support files |
ab19f879 SR |
1533 | # clean it up only when building all modules |
1534 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1535 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1da177e4 | 1536 | |
222d394d | 1537 | a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ |
06c5040c | 1538 | $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ |
5e8d780d | 1539 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) |
1da177e4 LT |
1540 | |
1541 | quiet_cmd_as_o_S = AS $@ | |
1542 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
1543 | ||
1544 | # read all saved command lines | |
1545 | ||
1546 | targets := $(wildcard $(sort $(targets))) | |
1547 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1548 | ||
1549 | ifneq ($(cmd_files),) | |
1550 | $(cmd_files): ; # Do not try to update included dependency files | |
1551 | include $(cmd_files) | |
1552 | endif | |
1553 | ||
1da177e4 LT |
1554 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
1555 | # Usage: | |
1556 | # $(Q)$(MAKE) $(clean)=dir | |
1557 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | |
1558 | ||
1da177e4 LT |
1559 | endif # skip-makefile |
1560 | ||
4f193362 | 1561 | PHONY += FORCE |
1da177e4 | 1562 | FORCE: |
4f193362 | 1563 | |
4f193362 PS |
1564 | # Declare the contents of the .PHONY variable as phony. We keep that |
1565 | # information in a variable se we can use it in if_changed and friends. | |
1566 | .PHONY: $(PHONY) |