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1da177e4 LT |
1 | VERSION = 2 |
2 | PATCHLEVEL = 6 | |
c5976504 | 3 | SUBLEVEL = 29 |
041b6237 | 4 | EXTRAVERSION = -rc8 |
061e41fd | 5 | NAME = Erotic Pickled Herring |
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 | |
d384e35a | 15 | # (this increases performance and avoids hard-to-debug behaviour); |
15964864 OV |
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 | 171 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
12760cb4 | 172 | -e s/sh.*/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 | |
4ce6efed | 192 | export KBUILD_BUILDHOST := $(SUBARCH) |
1da177e4 LT |
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 ($(ARCH),x86_64) | |
205 | SRCARCH := x86 | |
206 | endif | |
74b469f2 | 207 | |
5e538790 | 208 | # Additional ARCH settings for sparc |
a439fe51 | 209 | ifeq ($(ARCH),sparc64) |
5e538790 | 210 | SRCARCH := sparc |
a439fe51 | 211 | endif |
2fb9b1bd | 212 | |
5e538790 SR |
213 | # Where to locate arch specific headers |
214 | hdr-arch := $(SRCARCH) | |
215 | ||
49148020 SR |
216 | ifeq ($(ARCH),m68knommu) |
217 | hdr-arch := m68k | |
218 | endif | |
219 | ||
14cdd3c4 RZ |
220 | KCONFIG_CONFIG ?= .config |
221 | ||
1da177e4 LT |
222 | # SHELL used by kbuild |
223 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
224 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
225 | else echo sh; fi ; fi) | |
226 | ||
070b98bf SR |
227 | HOSTCC = gcc |
228 | HOSTCXX = g++ | |
229 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | |
230 | HOSTCXXFLAGS = -O2 | |
1da177e4 | 231 | |
070b98bf SR |
232 | # Decide whether to build built-in, modular, or both. |
233 | # Normally, just do built-in. | |
1da177e4 LT |
234 | |
235 | KBUILD_MODULES := | |
236 | KBUILD_BUILTIN := 1 | |
237 | ||
238 | # If we have only "make modules", don't compile built-in objects. | |
239 | # When we're building modules with modversions, we need to consider | |
240 | # the built-in objects during the descend as well, in order to | |
070b98bf | 241 | # make sure the checksums are up to date before we record them. |
1da177e4 LT |
242 | |
243 | ifeq ($(MAKECMDGOALS),modules) | |
244 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
245 | endif | |
246 | ||
247 | # If we have "make <whatever> modules", compile modules | |
248 | # in addition to whatever we do anyway. | |
249 | # Just "make" or "make all" shall build modules as well | |
250 | ||
251 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
252 | KBUILD_MODULES := 1 | |
253 | endif | |
254 | ||
255 | ifeq ($(MAKECMDGOALS),) | |
256 | KBUILD_MODULES := 1 | |
257 | endif | |
258 | ||
e579d351 | 259 | export KBUILD_MODULES KBUILD_BUILTIN |
1da177e4 LT |
260 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
261 | ||
262 | # Beautify output | |
263 | # --------------------------------------------------------------------------- | |
264 | # | |
265 | # Normally, we echo the whole command before executing it. By making | |
266 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
267 | # $(quiet) to choose other forms of output instead, e.g. | |
268 | # | |
269 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
270 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
271 | # | |
272 | # If $(quiet) is empty, the whole command will be printed. | |
273 | # If it is set to "quiet_", only the short version will be printed. | |
070b98bf | 274 | # If it is set to "silent_", nothing will be printed at all, since |
1da177e4 LT |
275 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
276 | # | |
a58a414f | 277 | # A simple variant is to prefix commands with $(Q) - that's useful |
1da177e4 LT |
278 | # for commands that shall be hidden in non-verbose mode. |
279 | # | |
280 | # $(Q)ln $@ :< | |
281 | # | |
282 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
283 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
284 | ||
285 | ifeq ($(KBUILD_VERBOSE),1) | |
286 | quiet = | |
287 | Q = | |
288 | else | |
289 | quiet=quiet_ | |
290 | Q = @ | |
291 | endif | |
292 | ||
293 | # If the user is running make -s (silent mode), suppress echoing of | |
294 | # commands | |
295 | ||
296 | ifneq ($(findstring s,$(MAKEFLAGS)),) | |
297 | quiet=silent_ | |
298 | endif | |
299 | ||
300 | export quiet Q KBUILD_VERBOSE | |
301 | ||
1da177e4 LT |
302 | |
303 | # Look for make include files relative to root of kernel src | |
304 | MAKEFLAGS += --include-dir=$(srctree) | |
305 | ||
1cacc9ab SR |
306 | # We need some generic definitions (do not try to remake the file). |
307 | $(srctree)/scripts/Kbuild.include: ; | |
15964864 | 308 | include $(srctree)/scripts/Kbuild.include |
1da177e4 LT |
309 | |
310 | # Make variables (CC, etc...) | |
311 | ||
312 | AS = $(CROSS_COMPILE)as | |
313 | LD = $(CROSS_COMPILE)ld | |
314 | CC = $(CROSS_COMPILE)gcc | |
315 | CPP = $(CC) -E | |
316 | AR = $(CROSS_COMPILE)ar | |
317 | NM = $(CROSS_COMPILE)nm | |
318 | STRIP = $(CROSS_COMPILE)strip | |
319 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
320 | OBJDUMP = $(CROSS_COMPILE)objdump | |
321 | AWK = awk | |
322 | GENKSYMS = scripts/genksyms/genksyms | |
323 | DEPMOD = /sbin/depmod | |
324 | KALLSYMS = scripts/kallsyms | |
325 | PERL = perl | |
326 | CHECK = sparse | |
327 | ||
80a7d1d9 HE |
328 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
329 | -Wbitwise -Wno-return-void $(CF) | |
1da177e4 LT |
330 | MODFLAGS = -DMODULE |
331 | CFLAGS_MODULE = $(MODFLAGS) | |
332 | AFLAGS_MODULE = $(MODFLAGS) | |
114f5157 | 333 | LDFLAGS_MODULE = |
1da177e4 LT |
334 | CFLAGS_KERNEL = |
335 | AFLAGS_KERNEL = | |
336 | ||
337 | ||
338 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
339 | # Needed to be compatible with the O= option | |
340 | LINUXINCLUDE := -Iinclude \ | |
2dd34b48 | 341 | $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ |
5e4786f7 SR |
342 | -I$(srctree)/arch/$(hdr-arch)/include \ |
343 | -include include/linux/autoconf.h | |
1da177e4 | 344 | |
d8672b40 | 345 | KBUILD_CPPFLAGS := -D__KERNEL__ |
1da177e4 | 346 | |
a0f97e06 | 347 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
94bed2a9 DJ |
348 | -fno-strict-aliasing -fno-common \ |
349 | -Werror-implicit-function-declaration | |
222d394d | 350 | KBUILD_AFLAGS := -D__ASSEMBLY__ |
1da177e4 | 351 | |
f1d28fb0 RZ |
352 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
353 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
2244cbd8 | 354 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
cb58455c | 355 | |
070b98bf | 356 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
80ef88d6 | 357 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
070b98bf SR |
358 | export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE |
359 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
1da177e4 | 360 | |
06c5040c | 361 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
a0f97e06 | 362 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
222d394d | 363 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
1da177e4 LT |
364 | |
365 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
366 | # tree rather than in the kernel tree. The kernel tree might | |
367 | # even be read-only. | |
368 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
369 | ||
1da177e4 LT |
370 | # Files to ignore in find ... statements |
371 | ||
406119f4 TM |
372 | 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 |
373 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
374 | |
375 | # =========================================================================== | |
376 | # Rules shared between *config targets and build targets | |
377 | ||
378 | # Basic helpers built in scripts/ | |
4f193362 | 379 | PHONY += scripts_basic |
1da177e4 LT |
380 | scripts_basic: |
381 | $(Q)$(MAKE) $(build)=scripts/basic | |
382 | ||
cd05e6bd JB |
383 | # To avoid any implicit rule to kick in, define an empty command. |
384 | scripts/basic/%: scripts_basic ; | |
385 | ||
4f193362 | 386 | PHONY += outputmakefile |
fd5f0cd6 JB |
387 | # outputmakefile generates a Makefile in the output directory, if using a |
388 | # separate output directory. This allows convenient use of make in the | |
389 | # output directory. | |
1da177e4 | 390 | outputmakefile: |
fd5f0cd6 | 391 | ifneq ($(KBUILD_SRC),) |
92979997 | 392 | $(Q)ln -fsn $(srctree) source |
fd5f0cd6 JB |
393 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
394 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
395 | endif | |
1da177e4 LT |
396 | |
397 | # To make sure we do not include .config for any of the *config targets | |
398 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
399 | # It is allowed to specify more targets when calling make, including | |
400 | # mixing *config targets and build targets. | |
070b98bf | 401 | # For example 'make oldconfig all'. |
1da177e4 LT |
402 | # Detect when mixed targets is specified, and make a second invocation |
403 | # of make so .config is not included in this case either (for *config). | |
404 | ||
3eb3c740 | 405 | no-dot-config-targets := clean mrproper distclean \ |
c30a02e0 | 406 | cscope TAGS tags help %docs check% \ |
3eb3c740 RZ |
407 | include/linux/version.h headers_% \ |
408 | kernelrelease kernelversion | |
1da177e4 LT |
409 | |
410 | config-targets := 0 | |
411 | mixed-targets := 0 | |
412 | dot-config := 1 | |
413 | ||
414 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
415 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
416 | dot-config := 0 | |
417 | endif | |
418 | endif | |
419 | ||
420 | ifeq ($(KBUILD_EXTMOD),) | |
421 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
422 | config-targets := 1 | |
423 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | |
424 | mixed-targets := 1 | |
425 | endif | |
426 | endif | |
427 | endif | |
428 | ||
429 | ifeq ($(mixed-targets),1) | |
430 | # =========================================================================== | |
431 | # We're called with mixed targets (*config and build targets). | |
432 | # Handle them one by one. | |
433 | ||
434 | %:: FORCE | |
435 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | |
436 | ||
437 | else | |
438 | ifeq ($(config-targets),1) | |
439 | # =========================================================================== | |
440 | # *config targets only - make sure prerequisites are updated, and descend | |
441 | # in scripts/kconfig to make the *config target | |
442 | ||
443 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
444 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
445 | # used for 'make defconfig' | |
74b469f2 | 446 | include $(srctree)/arch/$(SRCARCH)/Makefile |
61bee204 | 447 | export KBUILD_DEFCONFIG KBUILD_KCONFIG |
1da177e4 | 448 | |
31110ebb SR |
449 | config: scripts_basic outputmakefile FORCE |
450 | $(Q)mkdir -p include/linux include/config | |
451 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ | |
452 | ||
453 | %config: scripts_basic outputmakefile FORCE | |
c955ccaf | 454 | $(Q)mkdir -p include/linux include/config |
1da177e4 LT |
455 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
456 | ||
457 | else | |
458 | # =========================================================================== | |
459 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
460 | # targets and others. In general all targets except *config targets. | |
461 | ||
462 | ifeq ($(KBUILD_EXTMOD),) | |
463 | # Additional helpers built in scripts/ | |
464 | # Carefully list dependencies so we do not try to build scripts twice | |
070b98bf | 465 | # in parallel |
4f193362 | 466 | PHONY += scripts |
2e3646e5 | 467 | scripts: scripts_basic include/config/auto.conf |
1da177e4 LT |
468 | $(Q)$(MAKE) $(build)=$(@) |
469 | ||
1da177e4 LT |
470 | # Objects we will link into vmlinux / subdirs we need to visit |
471 | init-y := init/ | |
4d2acfbf | 472 | drivers-y := drivers/ sound/ firmware/ |
1da177e4 LT |
473 | net-y := net/ |
474 | libs-y := lib/ | |
475 | core-y := usr/ | |
476 | endif # KBUILD_EXTMOD | |
477 | ||
478 | ifeq ($(dot-config),1) | |
9ee4e336 SR |
479 | # Read in config |
480 | -include include/config/auto.conf | |
1da177e4 | 481 | |
9ee4e336 | 482 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
483 | # Read in dependencies to all Kconfig* files, make sure to run |
484 | # oldconfig if changes are detected. | |
c955ccaf | 485 | -include include/config/auto.conf.cmd |
1da177e4 | 486 | |
1da177e4 | 487 | # To avoid any implicit rule to kick in, define an empty command |
14cdd3c4 | 488 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
1da177e4 | 489 | |
c955ccaf | 490 | # If .config is newer than include/config/auto.conf, someone tinkered |
752625cf | 491 | # with it and forgot to run make oldconfig. |
070b98bf | 492 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so |
752625cf | 493 | # we execute the config step to be sure to catch updated Kconfig files |
14cdd3c4 | 494 | include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
1da177e4 | 495 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
3041e47e | 496 | else |
9ee4e336 SR |
497 | # external modules needs include/linux/autoconf.h and include/config/auto.conf |
498 | # but do not care if they are up-to-date. Use auto.conf to trigger the test | |
499 | PHONY += include/config/auto.conf | |
500 | ||
501 | include/config/auto.conf: | |
502 | $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ | |
503 | echo; \ | |
504 | echo " ERROR: Kernel configuration is invalid."; \ | |
505 | echo " include/linux/autoconf.h or $@ are missing."; \ | |
506 | echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
507 | echo; \ | |
508 | /bin/false) | |
509 | ||
510 | endif # KBUILD_EXTMOD | |
c955ccaf | 511 | |
1da177e4 LT |
512 | else |
513 | # Dummy target needed, because used as prerequisite | |
c955ccaf | 514 | include/config/auto.conf: ; |
9ee4e336 | 515 | endif # $(dot-config) |
1da177e4 LT |
516 | |
517 | # The all: target is the default when no target is given on the | |
518 | # command line. | |
519 | # This allow a user to issue only 'make' to build a kernel including modules | |
070b98bf | 520 | # Defaults vmlinux but it is usually overridden in the arch makefile |
1da177e4 LT |
521 | all: vmlinux |
522 | ||
523 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
a0f97e06 | 524 | KBUILD_CFLAGS += -Os |
1da177e4 | 525 | else |
a0f97e06 | 526 | KBUILD_CFLAGS += -O2 |
1da177e4 LT |
527 | endif |
528 | ||
bef5b54b RB |
529 | include $(srctree)/arch/$(SRCARCH)/Makefile |
530 | ||
35bb5b1e AK |
531 | ifneq (CONFIG_FRAME_WARN,0) |
532 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) | |
533 | endif | |
534 | ||
e06b8b98 | 535 | # Force gcc to behave correct even for buggy distributions |
5d707e9c | 536 | ifndef CONFIG_CC_STACKPROTECTOR |
e06b8b98 | 537 | KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) |
5d707e9c | 538 | endif |
e06b8b98 | 539 | |
1da177e4 | 540 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 541 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 542 | else |
a0f97e06 | 543 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 LT |
544 | endif |
545 | ||
546 | ifdef CONFIG_DEBUG_INFO | |
a0f97e06 | 547 | KBUILD_CFLAGS += -g |
222d394d | 548 | KBUILD_AFLAGS += -gdwarf-2 |
1da177e4 LT |
549 | endif |
550 | ||
606576ce | 551 | ifdef CONFIG_FUNCTION_TRACER |
16444a8a ACM |
552 | KBUILD_CFLAGS += -pg |
553 | endif | |
554 | ||
91341d4b SR |
555 | # We trigger additional mismatches with less inlining |
556 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
557 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
558 | endif | |
559 | ||
e8e69931 | 560 | # arch Makefile may override CC so keep this after arch Makefile is included |
e8f5bdb0 | 561 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 SR |
562 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
563 | ||
1da177e4 | 564 | # warn about C99 declaration after statement |
a0f97e06 | 565 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
1da177e4 | 566 | |
070b98bf | 567 | # disable pointer signed / unsigned warnings in gcc 4.0 |
a0f97e06 | 568 | KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) |
1da177e4 | 569 | |
d0115552 LT |
570 | # disable invalid "can't wrap" optimzations for signed / pointers |
571 | KBUILD_CFLAGS += $(call cc-option,-fwrapv) | |
572 | ||
06c5040c | 573 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
69ee0b35 SR |
574 | # But warn user when we do so |
575 | warn-assign = \ | |
576 | $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") | |
577 | ||
578 | ifneq ($(KCPPFLAGS),) | |
579 | $(call warn-assign,CPPFLAGS) | |
580 | KBUILD_CPPFLAGS += $(KCPPFLAGS) | |
581 | endif | |
582 | ifneq ($(KAFLAGS),) | |
583 | $(call warn-assign,AFLAGS) | |
584 | KBUILD_AFLAGS += $(KAFLAGS) | |
585 | endif | |
586 | ifneq ($(KCFLAGS),) | |
587 | $(call warn-assign,CFLAGS) | |
588 | KBUILD_CFLAGS += $(KCFLAGS) | |
589 | endif | |
52bcc330 | 590 | |
18991197 RM |
591 | # Use --build-id when available. |
592 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ | |
593 | $(call ld-option, -Wl$(comma)--build-id,)) | |
594 | LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) | |
595 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) | |
596 | ||
1da177e4 | 597 | # Default kernel image to build when no specific target is given. |
070b98bf | 598 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
599 | # set in the environment |
600 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
601 | # this default value | |
602 | export KBUILD_IMAGE ?= vmlinux | |
603 | ||
604 | # | |
605 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
606 | # images. Default is /boot, but you can set it to other values | |
607 | export INSTALL_PATH ?= /boot | |
608 | ||
609 | # | |
610 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
611 | # relocations required by build roots. This is not defined in the | |
070b98bf | 612 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
613 | # |
614 | ||
df9df036 | 615 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
616 | export MODLIB |
617 | ||
ac031f26 | 618 | # |
2ea03891 SR |
619 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
620 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
621 | # the default option --strip-debug will be used. Otherwise, | |
622 | # INSTALL_MOD_STRIP will used as the options to the strip command. | |
623 | ||
ac031f26 TT |
624 | ifdef INSTALL_MOD_STRIP |
625 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 626 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 627 | else |
2ea03891 | 628 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
629 | endif # INSTALL_MOD_STRIP=1 |
630 | else | |
2ea03891 | 631 | mod_strip_cmd = true |
ac031f26 TT |
632 | endif # INSTALL_MOD_STRIP |
633 | export mod_strip_cmd | |
634 | ||
1da177e4 LT |
635 | |
636 | ifeq ($(KBUILD_EXTMOD),) | |
3a65dfe8 | 637 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
638 | |
639 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
640 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
641 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | |
642 | ||
643 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
644 | $(init-n) $(init-) \ | |
645 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ | |
646 | $(net-n) $(net-) $(libs-n) $(libs-)))) | |
647 | ||
648 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
649 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
650 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
651 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
652 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
653 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
654 | libs-y := $(libs-y1) $(libs-y2) | |
655 | ||
656 | # Build vmlinux | |
657 | # --------------------------------------------------------------------------- | |
070b98bf | 658 | # vmlinux is built from the objects selected by $(vmlinux-init) and |
1da177e4 | 659 | # $(vmlinux-main). Most are built-in.o files from top-level directories |
2462566f | 660 | # in the kernel tree, others are specified in arch/$(ARCH)/Makefile. |
1da177e4 LT |
661 | # Ordering when linking is important, and $(vmlinux-init) must be first. |
662 | # | |
663 | # vmlinux | |
664 | # ^ | |
665 | # | | |
666 | # +-< $(vmlinux-init) | |
667 | # | +--< init/version.o + more | |
668 | # | | |
669 | # +--< $(vmlinux-main) | |
670 | # | +--< driver/built-in.o mm/built-in.o + more | |
671 | # | | |
672 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | |
673 | # | |
674 | # vmlinux version (uname -v) cannot be updated during normal | |
675 | # descending-into-subdirs phase since we do not yet know if we need to | |
676 | # update vmlinux. | |
677 | # Therefore this step is delayed until just before final link of vmlinux - | |
678 | # except in the kallsyms case where it is done just before adding the | |
679 | # symbols to the kernel. | |
680 | # | |
681 | # System.map is generated to document addresses of all kernel symbols | |
682 | ||
683 | vmlinux-init := $(head-y) $(init-y) | |
684 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) | |
685 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) | |
6752ed90 | 686 | vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds |
85bd2fdd | 687 | export KBUILD_VMLINUX_OBJS := $(vmlinux-all) |
1da177e4 LT |
688 | |
689 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS | |
690 | # May be overridden by arch/$(ARCH)/Makefile | |
691 | quiet_cmd_vmlinux__ ?= LD $@ | |
692 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ | |
693 | -T $(vmlinux-lds) $(vmlinux-init) \ | |
694 | --start-group $(vmlinux-main) --end-group \ | |
741f98fe | 695 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) |
1da177e4 LT |
696 | |
697 | # Generate new vmlinux version | |
698 | quiet_cmd_vmlinux_version = GEN .version | |
699 | cmd_vmlinux_version = set -e; \ | |
4e25d8bb JB |
700 | if [ ! -r .version ]; then \ |
701 | rm -f .version; \ | |
702 | echo 1 >.version; \ | |
703 | else \ | |
704 | mv .version .old_version; \ | |
705 | expr 0$$(cat .old_version) + 1 >.version; \ | |
706 | fi; \ | |
1da177e4 LT |
707 | $(MAKE) $(build)=init |
708 | ||
709 | # Generate System.map | |
070b98bf | 710 | quiet_cmd_sysmap = SYSMAP |
1da177e4 LT |
711 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
712 | ||
713 | # Link of vmlinux | |
714 | # If CONFIG_KALLSYMS is set .version is already updated | |
715 | # Generate System.map and verify that the content is consistent | |
39ca371c MR |
716 | # Use + in front of the vmlinux_version rule to silent warning with make -j2 |
717 | # First command is ':' to allow us to use + in front of the rule | |
1da177e4 | 718 | define rule_vmlinux__ |
39ca371c | 719 | : |
1da177e4 LT |
720 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) |
721 | ||
722 | $(call cmd,vmlinux__) | |
723 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
724 | ||
4635281c SR |
725 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
726 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ | |
727 | $(cmd_sysmap) $@ System.map; \ | |
728 | if [ $$? -ne 0 ]; then \ | |
729 | rm -f $@; \ | |
730 | /bin/false; \ | |
1da177e4 LT |
731 | fi; |
732 | $(verify_kallsyms) | |
733 | endef | |
734 | ||
735 | ||
736 | ifdef CONFIG_KALLSYMS | |
737 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) | |
738 | # It's a three stage process: | |
739 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is | |
740 | # empty | |
741 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
742 | # the right size - vmlinux version (uname -v) is updated during this step | |
743 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, | |
744 | # but due to the added section, some addresses have shifted. | |
745 | # From here, we generate a correct .tmp_kallsyms2.o | |
746 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. | |
747 | # o Verify that the System.map from vmlinux matches the map from | |
748 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. | |
749 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | |
750 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a | |
751 | # temporary bypass to allow the kernel to be built while the | |
752 | # maintainers work out what went wrong with kallsyms. | |
753 | ||
754 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | |
755 | last_kallsyms := 3 | |
756 | else | |
757 | last_kallsyms := 2 | |
758 | endif | |
759 | ||
760 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | |
761 | ||
762 | define verify_kallsyms | |
4635281c SR |
763 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
764 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | |
1da177e4 | 765 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map |
4635281c SR |
766 | $(Q)cmp -s System.map .tmp_System.map || \ |
767 | (echo Inconsistent kallsyms data; \ | |
768 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | |
1da177e4 LT |
769 | rm .tmp_kallsyms* ; /bin/false ) |
770 | endef | |
771 | ||
772 | # Update vmlinux version before link | |
773 | # Use + in front of this rule to silent warning about make -j1 | |
72ba47c1 | 774 | # First command is ':' to allow us to use + in front of this rule |
1da177e4 LT |
775 | cmd_ksym_ld = $(cmd_vmlinux__) |
776 | define rule_ksym_ld | |
72ba47c1 | 777 | : |
1da177e4 LT |
778 | +$(call cmd,vmlinux_version) |
779 | $(call cmd,vmlinux__) | |
780 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
781 | endef | |
782 | ||
783 | # Generate .S file with all kernel symbols | |
784 | quiet_cmd_kallsyms = KSYM $@ | |
2ea03891 SR |
785 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ |
786 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | |
9bb48247 | 787 | |
2ea03891 | 788 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE |
1da177e4 LT |
789 | $(call if_changed_dep,as_o_S) |
790 | ||
2ea03891 | 791 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) |
1da177e4 LT |
792 | $(call cmd,kallsyms) |
793 | ||
794 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version | |
2ea03891 SR |
795 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE |
796 | $(call if_changed_rule,ksym_ld) | |
1da177e4 | 797 | |
2ea03891 SR |
798 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE |
799 | $(call if_changed,vmlinux__) | |
1da177e4 | 800 | |
2ea03891 SR |
801 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE |
802 | $(call if_changed,vmlinux__) | |
1da177e4 LT |
803 | |
804 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | |
805 | $(KALLSYMS): scripts ; | |
806 | ||
33bc25ea SR |
807 | # Generate some data for debugging strange kallsyms problems |
808 | debug_kallsyms: .tmp_map$(last_kallsyms) | |
809 | ||
810 | .tmp_map%: .tmp_vmlinux% FORCE | |
811 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ | |
812 | ||
813 | .tmp_map3: .tmp_map2 | |
814 | ||
815 | .tmp_map2: .tmp_map1 | |
816 | ||
1da177e4 LT |
817 | endif # ifdef CONFIG_KALLSYMS |
818 | ||
741f98fe SR |
819 | # Do modpost on a prelinked vmlinux. The finally linked vmlinux has |
820 | # relevant sections renamed as per the linker script. | |
821 | quiet_cmd_vmlinux-modpost = LD $@ | |
822 | cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ | |
823 | $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ | |
90ebd878 | 824 | $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) |
741f98fe SR |
825 | define rule_vmlinux-modpost |
826 | : | |
827 | +$(call cmd,vmlinux-modpost) | |
828 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ | |
829 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd | |
830 | endef | |
831 | ||
1da177e4 | 832 | # vmlinux image - including updated kernel symbols |
310f8243 | 833 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE |
0f836e5f | 834 | ifdef CONFIG_HEADERS_CHECK |
0e7af8d0 | 835 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
267c4025 MD |
836 | endif |
837 | ifdef CONFIG_SAMPLES | |
838 | $(Q)$(MAKE) $(build)=samples | |
3794f3e8 RD |
839 | endif |
840 | ifdef CONFIG_BUILD_DOCSRC | |
841 | $(Q)$(MAKE) $(build)=Documentation | |
0f836e5f | 842 | endif |
741f98fe | 843 | $(call vmlinux-modpost) |
1da177e4 | 844 | $(call if_changed_rule,vmlinux__) |
4e25d8bb | 845 | $(Q)rm -f .old_version |
1da177e4 | 846 | |
310f8243 | 847 | # build vmlinux.o first to catch section mismatch errors early |
cf87dcd1 SR |
848 | ifdef CONFIG_KALLSYMS |
849 | .tmp_vmlinux1: vmlinux.o | |
850 | endif | |
90ebd878 SR |
851 | |
852 | modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) | |
853 | vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE | |
741f98fe SR |
854 | $(call if_changed_rule,vmlinux-modpost) |
855 | ||
1da177e4 LT |
856 | # The actual objects are generated when descending, |
857 | # make sure no implicit rule kicks in | |
858 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; | |
859 | ||
860 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
861 | # Preset locale variables to speed up the build process. Limit locale | |
862 | # tweaks to this spot to avoid wrong language settings when running | |
863 | # make menuconfig etc. | |
864 | # Error messages still appears in the original language | |
865 | ||
4f193362 | 866 | PHONY += $(vmlinux-dirs) |
5bb78269 | 867 | $(vmlinux-dirs): prepare scripts |
1da177e4 LT |
868 | $(Q)$(MAKE) $(build)=$@ |
869 | ||
cb58455c | 870 | # Build the kernel release string |
cb58455c | 871 | # |
1ef98856 RD |
872 | # The KERNELRELEASE value built here is stored in the file |
873 | # include/config/kernel.release, and is used when executing several | |
874 | # make targets, such as "make install" or "make modules_install." | |
875 | # | |
876 | # The eventual kernel release string consists of the following fields, | |
877 | # shown in a hierarchical format to show how smaller parts are concatenated | |
878 | # to form the larger and final value, with values coming from places like | |
879 | # the Makefile, kernel config options, make command line options and/or | |
880 | # SCM tag information. | |
881 | # | |
882 | # $(KERNELVERSION) | |
883 | # $(VERSION) eg, 2 | |
884 | # $(PATCHLEVEL) eg, 6 | |
885 | # $(SUBLEVEL) eg, 18 | |
886 | # $(EXTRAVERSION) eg, -rc6 | |
887 | # $(localver-full) | |
888 | # $(localver) | |
76c32956 | 889 | # localversion* (files without backups, containing '~') |
1ef98856 RD |
890 | # $(CONFIG_LOCALVERSION) (from kernel config setting) |
891 | # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) | |
892 | # ./scripts/setlocalversion (SCM tag, if one exists) | |
893 | # $(LOCALVERSION) (from make command line if provided) | |
894 | # | |
895 | # Note how the final $(localver-auto) string is included *only* if the | |
896 | # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the | |
897 | # moment, only git is supported but other SCMs can edit the script | |
898 | # scripts/setlocalversion and add the appropriate checks as needed. | |
cb58455c | 899 | |
76c32956 OV |
900 | pattern = ".*/localversion[^~]*" |
901 | string = $(shell cat /dev/null \ | |
fd19e44f | 902 | `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) |
cb58455c | 903 | |
76c32956 OV |
904 | localver = $(subst $(space),, $(string) \ |
905 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | |
070b98bf | 906 | |
cb58455c SR |
907 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
908 | # and if the SCM is know a tag from the SCM is appended. | |
070b98bf | 909 | # The appended tag is determined by the SCM used. |
cb58455c | 910 | # |
b925dbfe JH |
911 | # .scmversion is used when generating rpm packages so we do not loose |
912 | # the version information from the SCM when we do the build of the kernel | |
913 | # from the copied source | |
cb58455c | 914 | ifdef CONFIG_LOCALVERSION_AUTO |
b925dbfe JH |
915 | |
916 | ifeq ($(wildcard .scmversion),) | |
917 | _localver-auto = $(shell $(CONFIG_SHELL) \ | |
918 | $(srctree)/scripts/setlocalversion $(srctree)) | |
919 | else | |
920 | _localver-auto = $(shell cat .scmversion 2> /dev/null) | |
921 | endif | |
922 | ||
cb58455c SR |
923 | localver-auto = $(LOCALVERSION)$(_localver-auto) |
924 | endif | |
925 | ||
926 | localver-full = $(localver)$(localver-auto) | |
927 | ||
f1d28fb0 | 928 | # Store (new) KERNELRELASE string in include/config/kernel.release |
2244cbd8 | 929 | kernelrelease = $(KERNELVERSION)$(localver-full) |
f1d28fb0 | 930 | include/config/kernel.release: include/config/auto.conf FORCE |
2244cbd8 SR |
931 | $(Q)rm -f $@ |
932 | $(Q)echo $(kernelrelease) > $@ | |
cb58455c SR |
933 | |
934 | ||
1da177e4 | 935 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
936 | # or the modules are listed in "prepare". |
937 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
938 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
939 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 940 | |
5bb78269 | 941 | # Listed in dependency order |
4f193362 | 942 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
5bb78269 | 943 | |
86feeaa8 | 944 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
945 | # and if so do: |
946 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
947 | # 2) Create the include2 directory, used for the second asm symlink | |
f1d28fb0 | 948 | prepare3: include/config/kernel.release |
1da177e4 | 949 | ifneq ($(KBUILD_SRC),) |
fd54f502 | 950 | @$(kecho) ' Using $(srctree) as source for kernel' |
c955ccaf | 951 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
1da177e4 LT |
952 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
953 | echo " in the '$(srctree)' directory.";\ | |
954 | /bin/false; \ | |
955 | fi; | |
7a48bdd0 SR |
956 | $(Q)if [ ! -d include2 ]; then \ |
957 | mkdir -p include2; \ | |
2e57d051 | 958 | ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ |
7a48bdd0 | 959 | fi |
1da177e4 LT |
960 | endif |
961 | ||
86feeaa8 SR |
962 | # prepare2 creates a makefile if using a separate output directory |
963 | prepare2: prepare3 outputmakefile | |
1da177e4 | 964 | |
3eb3c740 RZ |
965 | prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ |
966 | include/asm include/config/auto.conf | |
7bb9d092 | 967 | $(cmd_crmodverdir) |
1da177e4 | 968 | |
5bb78269 SR |
969 | archprepare: prepare1 scripts_basic |
970 | ||
971 | prepare0: archprepare FORCE | |
8d36a623 | 972 | $(Q)$(MAKE) $(build)=. |
c53aeca0 | 973 | $(Q)$(MAKE) $(build)=. missing-syscalls |
86feeaa8 | 974 | |
1da177e4 | 975 | # All the preparing.. |
d395efb5 | 976 | prepare: prepare0 |
1da177e4 | 977 | |
070b98bf SR |
978 | # Leave this as default for preprocessing vmlinux.lds.S, which is now |
979 | # done in arch/$(ARCH)/kernel/Makefile | |
1da177e4 LT |
980 | |
981 | export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) | |
982 | ||
fc333b2d SR |
983 | # The asm symlink changes when $(ARCH) changes. |
984 | # Detect this and ask user to run make mrproper | |
dcc2da1a | 985 | # If asm is a stale symlink (point to dir that does not exist) remove it |
2e57d051 SR |
986 | define check-symlink |
987 | set -e; \ | |
988 | if [ -L include/asm ]; then \ | |
989 | asmlink=`readlink include/asm | cut -d '-' -f 2`; \ | |
990 | if [ "$$asmlink" != "$(SRCARCH)" ]; then \ | |
fc333b2d SR |
991 | echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ |
992 | echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ | |
2e57d051 SR |
993 | exit 1; \ |
994 | fi; \ | |
dcc2da1a SR |
995 | test -e $$asmlink || rm include/asm; \ |
996 | elif [ -d include/asm ]; then \ | |
997 | echo "ERROR: $@ is a directory but a symlink was expected";\ | |
998 | exit 1; \ | |
fc333b2d | 999 | fi |
2e57d051 SR |
1000 | endef |
1001 | ||
1002 | # We create the target directory of the symlink if it does | |
5a9e67b1 | 1003 | # not exist so the test in check-symlink works and we have a |
2e57d051 SR |
1004 | # directory for generated filesas used by some architectures. |
1005 | define create-symlink | |
1006 | if [ ! -L include/asm ]; then \ | |
fd54f502 | 1007 | $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ |
2e57d051 SR |
1008 | if [ ! -d include/asm-$(SRCARCH) ]; then \ |
1009 | mkdir -p include/asm-$(SRCARCH); \ | |
1010 | fi; \ | |
1011 | ln -fsn asm-$(SRCARCH) $@; \ | |
fc333b2d | 1012 | fi |
2e57d051 SR |
1013 | endef |
1014 | ||
1015 | include/asm: FORCE | |
1016 | $(Q)$(check-symlink) | |
1017 | $(Q)$(create-symlink) | |
1da177e4 | 1018 | |
1da177e4 LT |
1019 | # Generate some files |
1020 | # --------------------------------------------------------------------------- | |
1021 | ||
1022 | # KERNELRELEASE can change from a few different places, meaning version.h | |
1023 | # needs to be updated, so this check is forced on all builds | |
1024 | ||
1025 | uts_len := 64 | |
63104eec SR |
1026 | define filechk_utsrelease.h |
1027 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1028 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1029 | exit 1; \ | |
1030 | fi; \ | |
1031 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
1032 | endef | |
1da177e4 LT |
1033 | |
1034 | define filechk_version.h | |
63104eec SR |
1035 | (echo \#define LINUX_VERSION_CODE $(shell \ |
1036 | expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ | |
1037 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) | |
1da177e4 LT |
1038 | endef |
1039 | ||
63104eec | 1040 | include/linux/version.h: $(srctree)/Makefile FORCE |
1da177e4 LT |
1041 | $(call filechk,version.h) |
1042 | ||
63104eec SR |
1043 | include/linux/utsrelease.h: include/config/kernel.release FORCE |
1044 | $(call filechk,utsrelease.h) | |
1045 | ||
179efcb4 VN |
1046 | PHONY += headerdep |
1047 | headerdep: | |
1048 | $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl | |
1049 | ||
1da177e4 LT |
1050 | # --------------------------------------------------------------------------- |
1051 | ||
4f193362 | 1052 | PHONY += depend dep |
1da177e4 LT |
1053 | depend dep: |
1054 | @echo '*** Warning: make $@ is unnecessary now.' | |
1055 | ||
88ecf814 DW |
1056 | # --------------------------------------------------------------------------- |
1057 | # Firmware install | |
1058 | INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware | |
1059 | export INSTALL_FW_PATH | |
1060 | ||
1061 | PHONY += firmware_install | |
1062 | firmware_install: FORCE | |
1063 | @mkdir -p $(objtree)/firmware | |
1064 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install | |
1065 | ||
8d730cfb DW |
1066 | # --------------------------------------------------------------------------- |
1067 | # Kernel headers | |
8d730cfb | 1068 | |
e6883b18 SR |
1069 | #Default location for installed headers |
1070 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1071 | |
e6883b18 | 1072 | hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj |
2fb9b1bd SR |
1073 | # Find out where the Kbuild file is located to support |
1074 | # arch/$(ARCH)/include/asm | |
1075 | hdr-dir = $(strip \ | |
1076 | $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ | |
1077 | arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) | |
1078 | ||
1079 | # If we do an all arch process set dst to asm-$(hdr-arch) | |
1080 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) | |
e6883b18 SR |
1081 | |
1082 | PHONY += __headers | |
1083 | __headers: include/linux/version.h scripts_basic FORCE | |
398477d4 | 1084 | $(Q)$(MAKE) $(build)=scripts scripts/unifdef |
e6883b18 SR |
1085 | |
1086 | PHONY += headers_install_all | |
2fb9b1bd SR |
1087 | headers_install_all: |
1088 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
6d716275 | 1089 | |
8d730cfb | 1090 | PHONY += headers_install |
e6883b18 | 1091 | headers_install: __headers |
2fb9b1bd SR |
1092 | $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ |
1093 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
88181ec3 | 1094 | $(Q)$(MAKE) $(hdr-inst)=include |
2fb9b1bd | 1095 | $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) |
8d730cfb | 1096 | |
1f85712e MF |
1097 | PHONY += headers_check_all |
1098 | headers_check_all: headers_install_all | |
2fb9b1bd | 1099 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
1f85712e | 1100 | |
68475359 DW |
1101 | PHONY += headers_check |
1102 | headers_check: headers_install | |
88181ec3 | 1103 | $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 |
2fb9b1bd | 1104 | $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 |
68475359 | 1105 | |
1da177e4 LT |
1106 | # --------------------------------------------------------------------------- |
1107 | # Modules | |
1108 | ||
1109 | ifdef CONFIG_MODULES | |
1110 | ||
070b98bf | 1111 | # By default, build modules as well |
1da177e4 LT |
1112 | |
1113 | all: modules | |
1114 | ||
1115 | # Build modules | |
551559e1 TH |
1116 | # |
1117 | # A module can be listed more than once in obj-m resulting in | |
1118 | # duplicate lines in modules.order files. Those are removed | |
1119 | # using awk while concatenating to the final file. | |
1da177e4 | 1120 | |
4f193362 | 1121 | PHONY += modules |
1da177e4 | 1122 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) |
551559e1 | 1123 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
fd54f502 | 1124 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1125 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
44463f7d | 1126 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild |
1da177e4 LT |
1127 | |
1128 | ||
1129 | # Target to prepare building external modules | |
4f193362 | 1130 | PHONY += modules_prepare |
5bb78269 | 1131 | modules_prepare: prepare scripts |
1da177e4 LT |
1132 | |
1133 | # Target to install modules | |
4f193362 | 1134 | PHONY += modules_install |
1da177e4 LT |
1135 | modules_install: _modinst_ _modinst_post |
1136 | ||
4f193362 | 1137 | PHONY += _modinst_ |
1da177e4 | 1138 | _modinst_: |
ce454d4d | 1139 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
1da177e4 LT |
1140 | echo "Warning: you may need to install module-init-tools"; \ |
1141 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | |
1142 | sleep 1; \ | |
1143 | fi | |
1144 | @rm -rf $(MODLIB)/kernel | |
1145 | @rm -f $(MODLIB)/source | |
1146 | @mkdir -p $(MODLIB)/kernel | |
1147 | @ln -s $(srctree) $(MODLIB)/source | |
1148 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
1149 | rm -f $(MODLIB)/build ; \ | |
1150 | ln -s $(objtree) $(MODLIB)/build ; \ | |
1151 | fi | |
551559e1 | 1152 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
b805aa0e | 1153 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1154 | |
50a8ec31 | 1155 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1156 | # boot a modules.dep even before / is mounted read-write. However the |
1157 | # boot script depmod is the master version. | |
4f193362 | 1158 | PHONY += _modinst_post |
1da177e4 | 1159 | _modinst_post: _modinst_ |
88ecf814 | 1160 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst |
50a8ec31 | 1161 | $(call cmd,depmod) |
1da177e4 LT |
1162 | |
1163 | else # CONFIG_MODULES | |
1164 | ||
1165 | # Modules not configured | |
1166 | # --------------------------------------------------------------------------- | |
1167 | ||
1168 | modules modules_install: FORCE | |
1169 | @echo | |
1170 | @echo "The present kernel configuration has modules disabled." | |
1171 | @echo "Type 'make config' and enable loadable module support." | |
1172 | @echo "Then build a kernel with module support enabled." | |
1173 | @echo | |
1174 | @exit 1 | |
1175 | ||
1176 | endif # CONFIG_MODULES | |
1177 | ||
1da177e4 LT |
1178 | ### |
1179 | # Cleaning is done on three levels. | |
1180 | # make clean Delete most generated files | |
1181 | # Leave enough to build external modules | |
1182 | # make mrproper Delete the current configuration, and all generated files | |
1183 | # make distclean Remove editor backup files, patch leftover files and the like | |
1184 | ||
1185 | # Directories & files removed with 'make clean' | |
1186 | CLEAN_DIRS += $(MODVERDIR) | |
1187 | CLEAN_FILES += vmlinux System.map \ | |
1188 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map | |
1189 | ||
1190 | # Directories & files removed with 'make mrproper' | |
1ab7a1f3 | 1191 | MRPROPER_DIRS += include/config include2 usr/include |
50aa88e2 | 1192 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
3eb3c740 RZ |
1193 | include/linux/autoconf.h include/linux/version.h \ |
1194 | include/linux/utsrelease.h \ | |
7d3cc8b6 | 1195 | include/linux/bounds.h include/asm*/asm-offsets.h \ |
c28ca3aa | 1196 | Module.symvers Module.markers tags TAGS cscope* |
1da177e4 LT |
1197 | |
1198 | # clean - Delete most, but leave enough to build external modules | |
1199 | # | |
1200 | clean: rm-dirs := $(CLEAN_DIRS) | |
1201 | clean: rm-files := $(CLEAN_FILES) | |
3794f3e8 | 1202 | clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) |
1da177e4 | 1203 | |
4f193362 | 1204 | PHONY += $(clean-dirs) clean archclean |
1da177e4 LT |
1205 | $(clean-dirs): |
1206 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1207 | ||
1208 | clean: archclean $(clean-dirs) | |
1209 | $(call cmd,rmdirs) | |
1210 | $(call cmd,rmfiles) | |
1211 | @find . $(RCS_FIND_IGNORE) \ | |
070b98bf | 1212 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
15fde675 | 1213 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
d35cb360 | 1214 | -o -name '*.symtypes' -o -name 'modules.order' \ |
6b36ab27 | 1215 | -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ |
1da177e4 LT |
1216 | -type f -print | xargs rm -f |
1217 | ||
1218 | # mrproper - Delete all generated files, including .config | |
1219 | # | |
1220 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1221 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1222 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1223 | ||
4f193362 | 1224 | PHONY += $(mrproper-dirs) mrproper archmrproper |
1da177e4 LT |
1225 | $(mrproper-dirs): |
1226 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1227 | ||
1228 | mrproper: clean archmrproper $(mrproper-dirs) | |
1229 | $(call cmd,rmdirs) | |
1230 | $(call cmd,rmfiles) | |
1231 | ||
1232 | # distclean | |
1233 | # | |
4f193362 | 1234 | PHONY += distclean |
1da177e4 LT |
1235 | |
1236 | distclean: mrproper | |
1237 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1238 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
1da177e4 | 1239 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
070b98bf | 1240 | -o -name '.*.rej' -o -size 0 \ |
1da177e4 LT |
1241 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
1242 | -type f -print | xargs rm -f | |
1243 | ||
1244 | ||
1245 | # Packaging of the kernel to various formats | |
1246 | # --------------------------------------------------------------------------- | |
1247 | # rpm target kept for backward compatibility | |
1248 | package-dir := $(srctree)/scripts/package | |
1249 | ||
031ecc6d | 1250 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1251 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
031ecc6d | 1252 | rpm: include/config/kernel.release FORCE |
6c2133e1 | 1253 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1254 | |
1255 | ||
1256 | # Brief documentation of the typical targets used | |
1257 | # --------------------------------------------------------------------------- | |
1258 | ||
5dffbe81 | 1259 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
1da177e4 | 1260 | boards := $(notdir $(boards)) |
5dffbe81 SB |
1261 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1262 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 LT |
1263 | |
1264 | help: | |
1265 | @echo 'Cleaning targets:' | |
5ea084ef | 1266 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1267 | @echo ' enough build support to build external modules' |
5ea084ef | 1268 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1269 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1270 | @echo '' |
1271 | @echo 'Configuration targets:' | |
1272 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1273 | @echo '' | |
1274 | @echo 'Other generic targets:' | |
1275 | @echo ' all - Build all targets marked with [*]' | |
1276 | @echo '* vmlinux - Build the bare kernel' | |
1277 | @echo '* modules - Build all modules' | |
9cc5d74c | 1278 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
88ecf814 DW |
1279 | @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' |
1280 | @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' | |
1da177e4 LT |
1281 | @echo ' dir/ - Build all files in dir and below' |
1282 | @echo ' dir/file.[ois] - Build specified target only' | |
155ad605 | 1283 | @echo ' dir/file.ko - Build module including final link' |
243f40ce | 1284 | @echo ' prepare - Set up for building external modules' |
1da177e4 LT |
1285 | @echo ' tags/TAGS - Generate tags file for editors' |
1286 | @echo ' cscope - Generate cscope index' | |
6d128842 | 1287 | @echo ' kernelrelease - Output the release version string' |
cb58455c | 1288 | @echo ' kernelversion - Output the version stored in Makefile' |
2fb9b1bd | 1289 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1290 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1291 | echo '' |
1da177e4 | 1292 | @echo 'Static analysers' |
1da177e4 LT |
1293 | @echo ' checkstack - Generate a list of stack hogs' |
1294 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1295 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1296 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1297 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 VN |
1298 | @echo ' headers_check - Sanity check on exported headers' |
1299 | @echo ' headerdep - Detect inclusion cycles in headers'; \ | |
2fb9b1bd | 1300 | echo '' |
1da177e4 | 1301 | @echo 'Kernel packaging:' |
6c2133e1 | 1302 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1303 | @echo '' |
1304 | @echo 'Documentation targets:' | |
1305 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1306 | @echo '' | |
01dee188 | 1307 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1308 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1309 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1310 | @echo '' |
1311 | @$(if $(boards), \ | |
1312 | $(foreach b, $(boards), \ | |
1313 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1314 | echo '') | |
5dffbe81 SB |
1315 | @$(if $(board-dirs), \ |
1316 | $(foreach b, $(board-dirs), \ | |
1317 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1318 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1319 | echo '') | |
1da177e4 LT |
1320 | |
1321 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1322 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1323 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
701842e3 DK |
1324 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' |
1325 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
1da177e4 LT |
1326 | @echo '' |
1327 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1328 | @echo 'For further info see the ./README file' | |
1329 | ||
1330 | ||
5dffbe81 SB |
1331 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1332 | ||
1333 | help-boards: $(help-board-dirs) | |
1334 | ||
1335 | boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) | |
1336 | ||
1337 | $(help-board-dirs): help-%: | |
1338 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1339 | @$(if $(boards-per-dir), \ | |
1340 | $(foreach b, $(boards-per-dir), \ | |
1341 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1342 | echo '') | |
1343 | ||
1344 | ||
1da177e4 LT |
1345 | # Documentation targets |
1346 | # --------------------------------------------------------------------------- | |
1347 | %docs: scripts_basic FORCE | |
1348 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | |
1349 | ||
1350 | else # KBUILD_EXTMOD | |
1351 | ||
1352 | ### | |
1353 | # External module support. | |
1354 | # When building external modules the kernel used as basis is considered | |
1355 | # read-only, and no consistency checks are made and the make | |
1356 | # system is not used on the basis kernel. If updates are required | |
1357 | # in the basis kernel ordinary make commands (without M=...) must | |
1358 | # be used. | |
1359 | # | |
1360 | # The following are the only valid targets when building external | |
1361 | # modules. | |
1362 | # make M=dir clean Delete all automatically generated files | |
1363 | # make M=dir modules Make all modules in specified dir | |
1364 | # make M=dir Same as 'make M=dir modules' | |
1365 | # make M=dir modules_install | |
070b98bf | 1366 | # Install the modules built in the module directory |
1da177e4 LT |
1367 | # Assumes install directory is already created |
1368 | ||
1369 | # We are always building modules | |
1370 | KBUILD_MODULES := 1 | |
4f193362 | 1371 | PHONY += crmodverdir |
1da177e4 | 1372 | crmodverdir: |
7bb9d092 | 1373 | $(cmd_crmodverdir) |
1da177e4 | 1374 | |
4f193362 | 1375 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1376 | $(objtree)/Module.symvers: |
1377 | @test -e $(objtree)/Module.symvers || ( \ | |
1378 | echo; \ | |
1379 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1380 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1381 | echo ) | |
1382 | ||
1383 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1384 | PHONY += $(module-dirs) modules |
1da177e4 LT |
1385 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1386 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1387 | ||
1388 | modules: $(module-dirs) | |
fd54f502 | 1389 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1390 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1391 | |
4f193362 | 1392 | PHONY += modules_install |
a67dc21a | 1393 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1394 | |
4f193362 PS |
1395 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1396 | PHONY += _emodinst_ | |
a67dc21a | 1397 | _emodinst_: |
a67dc21a | 1398 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1399 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1400 | |
4f193362 | 1401 | PHONY += _emodinst_post |
a67dc21a SR |
1402 | _emodinst_post: _emodinst_ |
1403 | $(call cmd,depmod) | |
1404 | ||
1da177e4 LT |
1405 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1406 | ||
4f193362 | 1407 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1408 | $(clean-dirs): |
1409 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1410 | ||
1411 | clean: rm-dirs := $(MODVERDIR) | |
c34114f4 | 1412 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 LT |
1413 | clean: $(clean-dirs) |
1414 | $(call cmd,rmdirs) | |
c34114f4 | 1415 | $(call cmd,rmfiles) |
1da177e4 | 1416 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ |
070b98bf | 1417 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
1da177e4 LT |
1418 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
1419 | -type f -print | xargs rm -f | |
1420 | ||
1421 | help: | |
1422 | @echo ' Building external modules.' | |
1423 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1424 | @echo '' | |
1425 | @echo ' modules - default target, build the module(s)' | |
1426 | @echo ' modules_install - install the module' | |
1427 | @echo ' clean - remove generated files in module directory only' | |
1428 | @echo '' | |
06300b21 SR |
1429 | |
1430 | # Dummies... | |
4f193362 | 1431 | PHONY += prepare scripts |
06300b21 SR |
1432 | prepare: ; |
1433 | scripts: ; | |
1da177e4 LT |
1434 | endif # KBUILD_EXTMOD |
1435 | ||
1436 | # Generate tags for editors | |
1437 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1438 | quiet_cmd_tags = GEN $@ |
1439 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1440 | |
a680eedc | 1441 | tags TAGS cscope: FORCE |
1da177e4 LT |
1442 | $(call cmd,tags) |
1443 | ||
1da177e4 LT |
1444 | # Scripts to check various things for consistency |
1445 | # --------------------------------------------------------------------------- | |
1446 | ||
1da177e4 LT |
1447 | includecheck: |
1448 | find * $(RCS_FIND_IGNORE) \ | |
1449 | -name '*.[hcS]' -type f -print | sort \ | |
80007434 | 1450 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1451 | |
1452 | versioncheck: | |
1453 | find * $(RCS_FIND_IGNORE) \ | |
1454 | -name '*.[hcS]' -type f -print | sort \ | |
80007434 | 1455 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1456 | |
1da177e4 LT |
1457 | namespacecheck: |
1458 | $(PERL) $(srctree)/scripts/namespace.pl | |
1459 | ||
295ac051 AB |
1460 | export_report: |
1461 | $(PERL) $(srctree)/scripts/export_report.pl | |
1462 | ||
1da177e4 LT |
1463 | endif #ifeq ($(config-targets),1) |
1464 | endif #ifeq ($(mixed-targets),1) | |
1465 | ||
c30a02e0 | 1466 | PHONY += checkstack kernelrelease kernelversion |
e3ccf6e3 | 1467 | |
011e3a9a JD |
1468 | # UML needs a little special treatment here. It wants to use the host |
1469 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1470 | # else wants $(ARCH), including people doing cross-builds, which means | |
1471 | # that $(SUBARCH) doesn't work here. | |
1472 | ifeq ($(ARCH), um) | |
1473 | CHECKSTACK_ARCH := $(SUBARCH) | |
1474 | else | |
1475 | CHECKSTACK_ARCH := $(ARCH) | |
1476 | endif | |
1da177e4 LT |
1477 | checkstack: |
1478 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1479 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 LT |
1480 | |
1481 | kernelrelease: | |
f1d28fb0 RZ |
1482 | $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ |
1483 | $(error kernelrelease not valid - run 'make prepare' to update it)) | |
cb58455c | 1484 | kernelversion: |
2244cbd8 | 1485 | @echo $(KERNELVERSION) |
1da177e4 | 1486 | |
06300b21 SR |
1487 | # Single targets |
1488 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1489 | # Single targets are compatible with: |
e1b8513d | 1490 | # - build with mixed source and output |
bc2546a6 SR |
1491 | # - build with separate output dir 'make O=...' |
1492 | # - external modules | |
1493 | # | |
1494 | # target-dir => where to store outputfile | |
1495 | # build-dir => directory in kernel source tree to use | |
1496 | ||
1497 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1498 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1499 | target-dir = $(dir $@) |
1500 | else | |
1501 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1502 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1503 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1504 | endif | |
1505 | ||
f6ecebd6 | 1506 | %.s: %.c prepare scripts FORCE |
bc2546a6 | 1507 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1508 | %.i: %.c prepare scripts FORCE |
bc2546a6 | 1509 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1510 | %.o: %.c prepare scripts FORCE |
bc2546a6 | 1511 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1512 | %.lst: %.c prepare scripts FORCE |
bc2546a6 | 1513 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1514 | %.s: %.S prepare scripts FORCE |
bc2546a6 | 1515 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1516 | %.o: %.S prepare scripts FORCE |
bc2546a6 | 1517 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
15fde675 AG |
1518 | %.symtypes: %.c prepare scripts FORCE |
1519 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
06300b21 | 1520 | |
bc2546a6 | 1521 | # Modules |
31110ebb SR |
1522 | /: prepare scripts FORCE |
1523 | $(cmd_crmodverdir) | |
1524 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1525 | $(build)=$(build-dir) | |
1526 | %/: prepare scripts FORCE | |
7bb9d092 | 1527 | $(cmd_crmodverdir) |
06300b21 | 1528 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 SR |
1529 | $(build)=$(build-dir) |
1530 | %.ko: prepare scripts FORCE | |
7bb9d092 | 1531 | $(cmd_crmodverdir) |
06300b21 | 1532 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1533 | $(build)=$(build-dir) $(@:.ko=.o) |
b805aa0e | 1534 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
06300b21 | 1535 | |
1da177e4 LT |
1536 | # FIXME Should go into a make.lib or something |
1537 | # =========================================================================== | |
1538 | ||
1539 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1540 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1541 | ||
1542 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1543 | cmd_rmfiles = rm -f $(rm-files) | |
1544 | ||
bc3c26fe | 1545 | # Run depmod only if we have System.map and depmod is executable |
50a8ec31 SR |
1546 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
1547 | cmd_depmod = \ | |
d8d2e78a | 1548 | if [ -r System.map -a -x $(DEPMOD) ]; then \ |
50a8ec31 | 1549 | $(DEPMOD) -ae -F System.map \ |
75bccd88 | 1550 | $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ |
50a8ec31 SR |
1551 | $(KERNELRELEASE); \ |
1552 | fi | |
1553 | ||
7bb9d092 | 1554 | # Create temporary dir for module support files |
ab19f879 SR |
1555 | # clean it up only when building all modules |
1556 | cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ | |
1557 | $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) | |
1da177e4 | 1558 | |
222d394d | 1559 | a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ |
d8672b40 | 1560 | $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ |
5e8d780d | 1561 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) |
1da177e4 LT |
1562 | |
1563 | quiet_cmd_as_o_S = AS $@ | |
1564 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
1565 | ||
1566 | # read all saved command lines | |
1567 | ||
1568 | targets := $(wildcard $(sort $(targets))) | |
1569 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1570 | ||
1571 | ifneq ($(cmd_files),) | |
1572 | $(cmd_files): ; # Do not try to update included dependency files | |
1573 | include $(cmd_files) | |
1574 | endif | |
1575 | ||
1da177e4 LT |
1576 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
1577 | # Usage: | |
1578 | # $(Q)$(MAKE) $(clean)=dir | |
1579 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | |
1580 | ||
1da177e4 LT |
1581 | endif # skip-makefile |
1582 | ||
4f193362 | 1583 | PHONY += FORCE |
1da177e4 | 1584 | FORCE: |
4f193362 | 1585 | |
4f193362 PS |
1586 | # Declare the contents of the .PHONY variable as phony. We keep that |
1587 | # information in a variable se we can use it in if_changed and friends. | |
1588 | .PHONY: $(PHONY) |