Commit | Line | Data |
---|---|---|
c517d838 LT |
1 | VERSION = 4 |
2 | PATCHLEVEL = 0 | |
55922c9d | 3 | SUBLEVEL = 0 |
e42391cd | 4 | EXTRAVERSION = -rc6 |
c517d838 | 5 | NAME = Hurr durr I'ma sheep |
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 | ||
7ff52571 MY |
13 | # Do not use make's built-in rules and variables |
14 | # (this increases performance and avoids hard-to-debug behaviour); | |
15 | MAKEFLAGS += -rR | |
1da177e4 | 16 | |
c051346b | 17 | # Avoid funny character set dependencies |
06b5dc64 | 18 | unexport LC_ALL |
c051346b PA |
19 | LC_COLLATE=C |
20 | LC_NUMERIC=C | |
07105202 | 21 | export LC_COLLATE LC_NUMERIC |
c051346b | 22 | |
ab7474ea BP |
23 | # Avoid interference with shell env settings |
24 | unexport GREP_OPTIONS | |
25 | ||
1da177e4 LT |
26 | # We are using a recursive build, so we need to do a little thinking |
27 | # to get the ordering right. | |
28 | # | |
29 | # Most importantly: sub-Makefiles should only ever modify files in | |
30 | # their own directory. If in some directory we have a dependency on | |
31 | # a file in another dir (which doesn't happen often, but it's often | |
32 | # unavoidable when linking the built-in.o targets which finally | |
33 | # turn into vmlinux), we will call a sub make in that other dir, and | |
34 | # after that we are sure that everything which is in that other dir | |
35 | # is now up to date. | |
36 | # | |
37 | # The only cases where we need to modify files which have global | |
38 | # effects are thus separated out and done before the recursive | |
39 | # descending is started. They are now explicitly listed as the | |
40 | # prepare rule. | |
41 | ||
066b7ed9 MM |
42 | # Beautify output |
43 | # --------------------------------------------------------------------------- | |
44 | # | |
45 | # Normally, we echo the whole command before executing it. By making | |
46 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
47 | # $(quiet) to choose other forms of output instead, e.g. | |
48 | # | |
49 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
50 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
51 | # | |
52 | # If $(quiet) is empty, the whole command will be printed. | |
53 | # If it is set to "quiet_", only the short version will be printed. | |
54 | # If it is set to "silent_", nothing will be printed at all, since | |
55 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
56 | # | |
57 | # A simple variant is to prefix commands with $(Q) - that's useful | |
58 | # for commands that shall be hidden in non-verbose mode. | |
59 | # | |
60 | # $(Q)ln $@ :< | |
61 | # | |
62 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
63 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
64 | # | |
1da177e4 LT |
65 | # To put more focus on warnings, be less verbose as default |
66 | # Use 'make V=1' to see the full commands | |
67 | ||
b8b0618c CR |
68 | ifeq ("$(origin V)", "command line") |
69 | KBUILD_VERBOSE = $(V) | |
1da177e4 LT |
70 | endif |
71 | ifndef KBUILD_VERBOSE | |
72 | KBUILD_VERBOSE = 0 | |
73 | endif | |
74 | ||
066b7ed9 MM |
75 | ifeq ($(KBUILD_VERBOSE),1) |
76 | quiet = | |
77 | Q = | |
78 | else | |
79 | quiet=quiet_ | |
80 | Q = @ | |
81 | endif | |
82 | ||
83 | # If the user is running make -s (silent mode), suppress echoing of | |
84 | # commands | |
85 | ||
86 | ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 | |
87 | ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) | |
88 | quiet=silent_ | |
89 | endif | |
90 | else # make-3.8x | |
91 | ifneq ($(filter s% -s%,$(MAKEFLAGS)),) | |
92 | quiet=silent_ | |
93 | endif | |
94 | endif | |
95 | ||
96 | export quiet Q KBUILD_VERBOSE | |
97 | ||
1da177e4 LT |
98 | # kbuild supports saving output files in a separate directory. |
99 | # To locate output files in a separate directory two syntaxes are supported. | |
100 | # In both cases the working directory must be the root of the kernel src. | |
101 | # 1) O= | |
102 | # Use "make O=dir/to/store/output/files/" | |
070b98bf | 103 | # |
1da177e4 LT |
104 | # 2) Set KBUILD_OUTPUT |
105 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
106 | # where the output files shall be placed. | |
107 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
108 | # make | |
109 | # | |
110 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
111 | # variable. | |
112 | ||
1da177e4 LT |
113 | # KBUILD_SRC is set on invocation of make in OBJ directory |
114 | # KBUILD_SRC is not intended to be used by the regular user (for now) | |
115 | ifeq ($(KBUILD_SRC),) | |
116 | ||
117 | # OK, Make called in directory where kernel src resides | |
118 | # Do we want to locate output files in a separate directory? | |
b8b0618c CR |
119 | ifeq ("$(origin O)", "command line") |
120 | KBUILD_OUTPUT := $(O) | |
1da177e4 LT |
121 | endif |
122 | ||
123 | # That's our default target when none is given on the command line | |
4f193362 | 124 | PHONY := _all |
1da177e4 LT |
125 | _all: |
126 | ||
1cacc9ab SR |
127 | # Cancel implicit rules on top Makefile |
128 | $(CURDIR)/Makefile Makefile: ; | |
129 | ||
1da177e4 LT |
130 | ifneq ($(KBUILD_OUTPUT),) |
131 | # Invoke a second make in the output directory, passing relevant variables | |
132 | # check that the output directory actually exists | |
133 | saved-output := $(KBUILD_OUTPUT) | |
1c9e70a5 MY |
134 | KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
135 | && /bin/pwd) | |
1da177e4 | 136 | $(if $(KBUILD_OUTPUT),, \ |
1c9e70a5 | 137 | $(error failed to create output directory "$(saved-output)")) |
1da177e4 | 138 | |
0b35786d MM |
139 | PHONY += $(MAKECMDGOALS) sub-make |
140 | ||
1cacc9ab | 141 | $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
16f89098 | 142 | @: |
0b35786d MM |
143 | |
144 | sub-make: FORCE | |
745a2543 | 145 | $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ |
aa55c8e2 | 146 | -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
1da177e4 LT |
147 | |
148 | # Leave processing to above invocation of make | |
149 | skip-makefile := 1 | |
150 | endif # ifneq ($(KBUILD_OUTPUT),) | |
151 | endif # ifeq ($(KBUILD_SRC),) | |
152 | ||
153 | # We process the rest of the Makefile if this is the final invocation of make | |
154 | ifeq ($(skip-makefile),) | |
155 | ||
7ff52571 MY |
156 | # Do not print "Entering directory ...", |
157 | # but we want to display it when entering to the output directory | |
158 | # so that IDEs/editors are able to understand relative filenames. | |
159 | MAKEFLAGS += --no-print-directory | |
160 | ||
aa55c8e2 MY |
161 | # Call a source code checker (by default, "sparse") as part of the |
162 | # C compilation. | |
163 | # | |
164 | # Use 'make C=1' to enable checking of only re-compiled files. | |
165 | # Use 'make C=2' to enable checking of *all* source files, regardless | |
166 | # of whether they are re-compiled or not. | |
167 | # | |
168 | # See the file "Documentation/sparse.txt" for more details, including | |
169 | # where to get the "sparse" utility. | |
170 | ||
171 | ifeq ("$(origin C)", "command line") | |
172 | KBUILD_CHECKSRC = $(C) | |
173 | endif | |
174 | ifndef KBUILD_CHECKSRC | |
175 | KBUILD_CHECKSRC = 0 | |
176 | endif | |
177 | ||
178 | # Use make M=dir to specify directory of external module to build | |
179 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
180 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
181 | ifdef SUBDIRS | |
182 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
183 | endif | |
184 | ||
185 | ifeq ("$(origin M)", "command line") | |
186 | KBUILD_EXTMOD := $(M) | |
187 | endif | |
188 | ||
1da177e4 LT |
189 | # If building an external module we do not care about the all: rule |
190 | # but instead _all depend on modules | |
4f193362 | 191 | PHONY += all |
1da177e4 LT |
192 | ifeq ($(KBUILD_EXTMOD),) |
193 | _all: all | |
194 | else | |
195 | _all: modules | |
196 | endif | |
197 | ||
9da0763b MM |
198 | ifeq ($(KBUILD_SRC),) |
199 | # building in the source tree | |
200 | srctree := . | |
201 | else | |
202 | ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) | |
203 | # building in a subdirectory of the source tree | |
204 | srctree := .. | |
205 | else | |
206 | srctree := $(KBUILD_SRC) | |
207 | endif | |
208 | endif | |
7e1c0477 | 209 | objtree := . |
1da177e4 LT |
210 | src := $(srctree) |
211 | obj := $(objtree) | |
212 | ||
0f558c33 | 213 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
1da177e4 | 214 | |
11294235 | 215 | export srctree objtree VPATH |
1da177e4 | 216 | |
1da177e4 LT |
217 | # SUBARCH tells the usermode build what the underlying arch is. That is set |
218 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
219 | # line overrides the setting of ARCH below. If a native build is happening, | |
38385f8f | 220 | # then ARCH is assigned, getting whatever value it gets normally, and |
1da177e4 LT |
221 | # SUBARCH is subsequently ignored. |
222 | ||
ffee0de4 DW |
223 | SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ |
224 | -e s/sun4u/sparc64/ \ | |
1da177e4 | 225 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
39990b5e | 226 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
236b1957 | 227 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
f1b99392 | 228 | -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) |
1da177e4 LT |
229 | |
230 | # Cross compiling and selecting different set of gcc/bin-utils | |
231 | # --------------------------------------------------------------------------- | |
232 | # | |
233 | # When performing cross compilation for other architectures ARCH shall be set | |
234 | # to the target architecture. (See arch/* for the possibilities). | |
235 | # ARCH can be set during invocation of make: | |
236 | # make ARCH=ia64 | |
237 | # Another way is to have ARCH set in the environment. | |
238 | # The default ARCH is the host where make is executed. | |
239 | ||
240 | # CROSS_COMPILE specify the prefix used for all executables used | |
241 | # during compilation. Only gcc and related bin-utils executables | |
242 | # are prefixed with $(CROSS_COMPILE). | |
243 | # CROSS_COMPILE can be set on the command line | |
244 | # make CROSS_COMPILE=ia64-linux- | |
245 | # Alternatively CROSS_COMPILE can be set in the environment. | |
84336466 RM |
246 | # A third alternative is to store a setting in .config so that plain |
247 | # "make" in the configured kernel build directory always uses that. | |
1da177e4 LT |
248 | # Default value for CROSS_COMPILE is not to prefix executables |
249 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
2331d1a6 | 250 | ARCH ?= $(SUBARCH) |
84336466 | 251 | CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) |
1da177e4 LT |
252 | |
253 | # Architecture as present in compile.h | |
6752ed90 TG |
254 | UTS_MACHINE := $(ARCH) |
255 | SRCARCH := $(ARCH) | |
1da177e4 | 256 | |
d746d647 SR |
257 | # Additional ARCH settings for x86 |
258 | ifeq ($(ARCH),i386) | |
259 | SRCARCH := x86 | |
260 | endif | |
261 | ifeq ($(ARCH),x86_64) | |
262 | SRCARCH := x86 | |
263 | endif | |
74b469f2 | 264 | |
5e538790 | 265 | # Additional ARCH settings for sparc |
e69f58c0 NK |
266 | ifeq ($(ARCH),sparc32) |
267 | SRCARCH := sparc | |
268 | endif | |
a439fe51 | 269 | ifeq ($(ARCH),sparc64) |
5e538790 | 270 | SRCARCH := sparc |
a439fe51 | 271 | endif |
2fb9b1bd | 272 | |
3cc000b5 PM |
273 | # Additional ARCH settings for sh |
274 | ifeq ($(ARCH),sh64) | |
275 | SRCARCH := sh | |
276 | endif | |
277 | ||
18aecc2b | 278 | # Additional ARCH settings for tile |
6738d321 CM |
279 | ifeq ($(ARCH),tilepro) |
280 | SRCARCH := tile | |
281 | endif | |
18aecc2b CM |
282 | ifeq ($(ARCH),tilegx) |
283 | SRCARCH := tile | |
284 | endif | |
285 | ||
5e538790 SR |
286 | # Where to locate arch specific headers |
287 | hdr-arch := $(SRCARCH) | |
288 | ||
14cdd3c4 | 289 | KCONFIG_CONFIG ?= .config |
41263fc6 | 290 | export KCONFIG_CONFIG |
14cdd3c4 | 291 | |
1da177e4 LT |
292 | # SHELL used by kbuild |
293 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
294 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
295 | else echo sh; fi ; fi) | |
296 | ||
070b98bf SR |
297 | HOSTCC = gcc |
298 | HOSTCXX = g++ | |
51b97e35 | 299 | HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 |
070b98bf | 300 | HOSTCXXFLAGS = -O2 |
1da177e4 | 301 | |
61163efa BW |
302 | ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) |
303 | HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ | |
304 | -Wno-missing-field-initializers -fno-delete-null-pointer-checks | |
305 | endif | |
306 | ||
070b98bf SR |
307 | # Decide whether to build built-in, modular, or both. |
308 | # Normally, just do built-in. | |
1da177e4 LT |
309 | |
310 | KBUILD_MODULES := | |
311 | KBUILD_BUILTIN := 1 | |
312 | ||
3fbb43df MY |
313 | # If we have only "make modules", don't compile built-in objects. |
314 | # When we're building modules with modversions, we need to consider | |
315 | # the built-in objects during the descend as well, in order to | |
316 | # make sure the checksums are up to date before we record them. | |
1da177e4 LT |
317 | |
318 | ifeq ($(MAKECMDGOALS),modules) | |
319 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
320 | endif | |
321 | ||
3fbb43df MY |
322 | # If we have "make <whatever> modules", compile modules |
323 | # in addition to whatever we do anyway. | |
324 | # Just "make" or "make all" shall build modules as well | |
1da177e4 LT |
325 | |
326 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
327 | KBUILD_MODULES := 1 | |
328 | endif | |
329 | ||
330 | ifeq ($(MAKECMDGOALS),) | |
331 | KBUILD_MODULES := 1 | |
332 | endif | |
333 | ||
e579d351 | 334 | export KBUILD_MODULES KBUILD_BUILTIN |
1da177e4 LT |
335 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
336 | ||
61163efa BW |
337 | ifneq ($(CC),) |
338 | ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1) | |
339 | COMPILER := clang | |
340 | else | |
341 | COMPILER := gcc | |
342 | endif | |
343 | export COMPILER | |
344 | endif | |
1da177e4 LT |
345 | |
346 | # Look for make include files relative to root of kernel src | |
347 | MAKEFLAGS += --include-dir=$(srctree) | |
348 | ||
1cacc9ab SR |
349 | # We need some generic definitions (do not try to remake the file). |
350 | $(srctree)/scripts/Kbuild.include: ; | |
15964864 | 351 | include $(srctree)/scripts/Kbuild.include |
1da177e4 LT |
352 | |
353 | # Make variables (CC, etc...) | |
1da177e4 LT |
354 | AS = $(CROSS_COMPILE)as |
355 | LD = $(CROSS_COMPILE)ld | |
356 | CC = $(CROSS_COMPILE)gcc | |
357 | CPP = $(CC) -E | |
358 | AR = $(CROSS_COMPILE)ar | |
359 | NM = $(CROSS_COMPILE)nm | |
360 | STRIP = $(CROSS_COMPILE)strip | |
361 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
362 | OBJDUMP = $(CROSS_COMPILE)objdump | |
363 | AWK = awk | |
364 | GENKSYMS = scripts/genksyms/genksyms | |
caa27b66 | 365 | INSTALLKERNEL := installkernel |
1da177e4 | 366 | DEPMOD = /sbin/depmod |
1da177e4 | 367 | PERL = perl |
011bf125 | 368 | PYTHON = python |
1da177e4 LT |
369 | CHECK = sparse |
370 | ||
80a7d1d9 HE |
371 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
372 | -Wbitwise -Wno-return-void $(CF) | |
6588169d SR |
373 | CFLAGS_MODULE = |
374 | AFLAGS_MODULE = | |
375 | LDFLAGS_MODULE = | |
1da177e4 LT |
376 | CFLAGS_KERNEL = |
377 | AFLAGS_KERNEL = | |
2521f2c2 | 378 | CFLAGS_GCOV = -fprofile-arcs -ftest-coverage |
1da177e4 LT |
379 | |
380 | ||
abbf1590 DH |
381 | # Use USERINCLUDE when you must reference the UAPI directories only. |
382 | USERINCLUDE := \ | |
383 | -I$(srctree)/arch/$(hdr-arch)/include/uapi \ | |
384 | -Iarch/$(hdr-arch)/include/generated/uapi \ | |
385 | -I$(srctree)/include/uapi \ | |
386 | -Iinclude/generated/uapi \ | |
387 | -include $(srctree)/include/linux/kconfig.h | |
388 | ||
1da177e4 LT |
389 | # Use LINUXINCLUDE when you must reference the include/ directory. |
390 | # Needed to be compatible with the O= option | |
abbf1590 DH |
391 | LINUXINCLUDE := \ |
392 | -I$(srctree)/arch/$(hdr-arch)/include \ | |
90ac086b | 393 | -Iarch/$(hdr-arch)/include/generated/uapi \ |
abbf1590 DH |
394 | -Iarch/$(hdr-arch)/include/generated \ |
395 | $(if $(KBUILD_SRC), -I$(srctree)/include) \ | |
396 | -Iinclude \ | |
397 | $(USERINCLUDE) | |
1da177e4 | 398 | |
d8672b40 | 399 | KBUILD_CPPFLAGS := -D__KERNEL__ |
1da177e4 | 400 | |
a0f97e06 | 401 | KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
94bed2a9 | 402 | -fno-strict-aliasing -fno-common \ |
a8735821 | 403 | -Werror-implicit-function-declaration \ |
51b97e35 KS |
404 | -Wno-format-security \ |
405 | -std=gnu89 | |
a1c48bb1 | 406 | |
80c00ba9 SR |
407 | KBUILD_AFLAGS_KERNEL := |
408 | KBUILD_CFLAGS_KERNEL := | |
222d394d | 409 | KBUILD_AFLAGS := -D__ASSEMBLY__ |
6588169d SR |
410 | KBUILD_AFLAGS_MODULE := -DMODULE |
411 | KBUILD_CFLAGS_MODULE := -DMODULE | |
412 | KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds | |
1da177e4 | 413 | |
f1d28fb0 RZ |
414 | # Read KERNELRELEASE from include/config/kernel.release (if it exists) |
415 | KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) | |
cacd54ef | 416 | KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
cb58455c | 417 | |
070b98bf | 418 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
80ef88d6 | 419 | export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
caa27b66 | 420 | export CPP AR NM STRIP OBJCOPY OBJDUMP |
011bf125 | 421 | export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE |
070b98bf | 422 | export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
1da177e4 | 423 | |
06c5040c | 424 | export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
0b24becc | 425 | export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KASAN |
222d394d | 426 | export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
6588169d | 427 | export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
80c00ba9 | 428 | export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
40df759e | 429 | export KBUILD_ARFLAGS |
1da177e4 LT |
430 | |
431 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
432 | # tree rather than in the kernel tree. The kernel tree might | |
433 | # even be read-only. | |
434 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
435 | ||
1da177e4 LT |
436 | # Files to ignore in find ... statements |
437 | ||
ae63b2d7 PB |
438 | export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
439 | -name CVS -o -name .pc -o -name .hg -o -name .git \) \ | |
440 | -prune -o | |
450c6076 JJ |
441 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
442 | --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
443 | |
444 | # =========================================================================== | |
445 | # Rules shared between *config targets and build targets | |
446 | ||
447 | # Basic helpers built in scripts/ | |
4f193362 | 448 | PHONY += scripts_basic |
1da177e4 LT |
449 | scripts_basic: |
450 | $(Q)$(MAKE) $(build)=scripts/basic | |
638adb05 | 451 | $(Q)rm -f .tmp_quiet_recordmcount |
1da177e4 | 452 | |
cd05e6bd JB |
453 | # To avoid any implicit rule to kick in, define an empty command. |
454 | scripts/basic/%: scripts_basic ; | |
455 | ||
4f193362 | 456 | PHONY += outputmakefile |
fd5f0cd6 JB |
457 | # outputmakefile generates a Makefile in the output directory, if using a |
458 | # separate output directory. This allows convenient use of make in the | |
459 | # output directory. | |
1da177e4 | 460 | outputmakefile: |
fd5f0cd6 | 461 | ifneq ($(KBUILD_SRC),) |
92979997 | 462 | $(Q)ln -fsn $(srctree) source |
fd5f0cd6 JB |
463 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
464 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) | |
465 | endif | |
1da177e4 | 466 | |
d8ecc5cd SR |
467 | # Support for using generic headers in asm-generic |
468 | PHONY += asm-generic | |
469 | asm-generic: | |
470 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
3c5994c8 CM |
471 | src=asm obj=arch/$(SRCARCH)/include/generated/asm |
472 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ | |
473 | src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm | |
d8ecc5cd | 474 | |
1da177e4 LT |
475 | # To make sure we do not include .config for any of the *config targets |
476 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
477 | # It is allowed to specify more targets when calling make, including | |
478 | # mixing *config targets and build targets. | |
070b98bf | 479 | # For example 'make oldconfig all'. |
1da177e4 LT |
480 | # Detect when mixed targets is specified, and make a second invocation |
481 | # of make so .config is not included in this case either (for *config). | |
482 | ||
10b63956 | 483 | version_h := include/generated/uapi/linux/version.h |
223c24a7 | 484 | old_version_h := include/linux/version.h |
d183e6f5 | 485 | |
3eb3c740 | 486 | no-dot-config-targets := clean mrproper distclean \ |
fbae4d58 | 487 | cscope gtags TAGS tags help% %docs check% coccicheck \ |
d183e6f5 | 488 | $(version_h) headers_% archheaders archscripts \ |
4aed2fd8 | 489 | kernelversion %src-pkg |
1da177e4 LT |
490 | |
491 | config-targets := 0 | |
492 | mixed-targets := 0 | |
493 | dot-config := 1 | |
494 | ||
495 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
496 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
497 | dot-config := 0 | |
498 | endif | |
499 | endif | |
500 | ||
501 | ifeq ($(KBUILD_EXTMOD),) | |
502 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
503 | config-targets := 1 | |
d0d38cd9 | 504 | ifneq ($(words $(MAKECMDGOALS)),1) |
1da177e4 LT |
505 | mixed-targets := 1 |
506 | endif | |
507 | endif | |
508 | endif | |
509 | ||
510 | ifeq ($(mixed-targets),1) | |
511 | # =========================================================================== | |
512 | # We're called with mixed targets (*config and build targets). | |
513 | # Handle them one by one. | |
514 | ||
9319f453 MY |
515 | PHONY += $(MAKECMDGOALS) __build_one_by_one |
516 | ||
517 | $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one | |
518 | @: | |
519 | ||
520 | __build_one_by_one: | |
521 | $(Q)set -e; \ | |
522 | for i in $(MAKECMDGOALS); do \ | |
523 | $(MAKE) -f $(srctree)/Makefile $$i; \ | |
524 | done | |
1da177e4 LT |
525 | |
526 | else | |
527 | ifeq ($(config-targets),1) | |
528 | # =========================================================================== | |
529 | # *config targets only - make sure prerequisites are updated, and descend | |
530 | # in scripts/kconfig to make the *config target | |
531 | ||
532 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
533 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
534 | # used for 'make defconfig' | |
74b469f2 | 535 | include $(srctree)/arch/$(SRCARCH)/Makefile |
61bee204 | 536 | export KBUILD_DEFCONFIG KBUILD_KCONFIG |
1da177e4 | 537 | |
31110ebb | 538 | config: scripts_basic outputmakefile FORCE |
31110ebb SR |
539 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
540 | ||
541 | %config: scripts_basic outputmakefile FORCE | |
1da177e4 LT |
542 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
543 | ||
544 | else | |
545 | # =========================================================================== | |
546 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
547 | # targets and others. In general all targets except *config targets. | |
548 | ||
549 | ifeq ($(KBUILD_EXTMOD),) | |
550 | # Additional helpers built in scripts/ | |
551 | # Carefully list dependencies so we do not try to build scripts twice | |
070b98bf | 552 | # in parallel |
4f193362 | 553 | PHONY += scripts |
a54292f5 AS |
554 | scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ |
555 | asm-generic | |
1da177e4 LT |
556 | $(Q)$(MAKE) $(build)=$(@) |
557 | ||
1da177e4 LT |
558 | # Objects we will link into vmlinux / subdirs we need to visit |
559 | init-y := init/ | |
4d2acfbf | 560 | drivers-y := drivers/ sound/ firmware/ |
1da177e4 LT |
561 | net-y := net/ |
562 | libs-y := lib/ | |
563 | core-y := usr/ | |
564 | endif # KBUILD_EXTMOD | |
565 | ||
566 | ifeq ($(dot-config),1) | |
9ee4e336 SR |
567 | # Read in config |
568 | -include include/config/auto.conf | |
1da177e4 | 569 | |
9ee4e336 | 570 | ifeq ($(KBUILD_EXTMOD),) |
1da177e4 LT |
571 | # Read in dependencies to all Kconfig* files, make sure to run |
572 | # oldconfig if changes are detected. | |
c955ccaf | 573 | -include include/config/auto.conf.cmd |
1da177e4 | 574 | |
1da177e4 | 575 | # To avoid any implicit rule to kick in, define an empty command |
14cdd3c4 | 576 | $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
1da177e4 | 577 | |
c955ccaf | 578 | # If .config is newer than include/config/auto.conf, someone tinkered |
752625cf | 579 | # with it and forgot to run make oldconfig. |
070b98bf | 580 | # if auto.conf.cmd is missing then we are probably in a cleaned tree so |
752625cf | 581 | # we execute the config step to be sure to catch updated Kconfig files |
bc081dd6 | 582 | include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
1da177e4 | 583 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
3041e47e | 584 | else |
264a2683 | 585 | # external modules needs include/generated/autoconf.h and include/config/auto.conf |
9ee4e336 SR |
586 | # but do not care if they are up-to-date. Use auto.conf to trigger the test |
587 | PHONY += include/config/auto.conf | |
588 | ||
589 | include/config/auto.conf: | |
264a2683 | 590 | $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
5369f550 MM |
591 | echo >&2; \ |
592 | echo >&2 " ERROR: Kernel configuration is invalid."; \ | |
593 | echo >&2 " include/generated/autoconf.h or $@ are missing.";\ | |
594 | echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ | |
595 | echo >&2 ; \ | |
9ee4e336 SR |
596 | /bin/false) |
597 | ||
598 | endif # KBUILD_EXTMOD | |
c955ccaf | 599 | |
1da177e4 LT |
600 | else |
601 | # Dummy target needed, because used as prerequisite | |
c955ccaf | 602 | include/config/auto.conf: ; |
9ee4e336 | 603 | endif # $(dot-config) |
1da177e4 LT |
604 | |
605 | # The all: target is the default when no target is given on the | |
606 | # command line. | |
607 | # This allow a user to issue only 'make' to build a kernel including modules | |
c8447161 | 608 | # Defaults to vmlinux, but the arch makefile usually adds further targets |
1da177e4 LT |
609 | all: vmlinux |
610 | ||
a1c48bb1 GU |
611 | include $(srctree)/arch/$(SRCARCH)/Makefile |
612 | ||
613 | KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) | |
614 | ||
1da177e4 | 615 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
e74fc973 | 616 | KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) |
1da177e4 | 617 | else |
a0f97e06 | 618 | KBUILD_CFLAGS += -O2 |
1da177e4 LT |
619 | endif |
620 | ||
69102311 JK |
621 | # Tell gcc to never replace conditional load with a non-conditional one |
622 | KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) | |
623 | ||
1873e870 AK |
624 | ifdef CONFIG_READABLE_ASM |
625 | # Disable optimizations that make assembler listings hard to read. | |
626 | # reorder blocks reorders the control in the function | |
627 | # ipa clone creates specialized cloned functions | |
628 | # partial inlining inlines only parts of functions | |
629 | KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ | |
630 | $(call cc-option,-fno-ipa-cp-clone,) \ | |
631 | $(call cc-option,-fno-partial-inlining) | |
632 | endif | |
633 | ||
08f67461 | 634 | ifneq ($(CONFIG_FRAME_WARN),0) |
35bb5b1e AK |
635 | KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
636 | endif | |
637 | ||
19952a92 | 638 | # Handle stack protector mode. |
1332429b KC |
639 | # |
640 | # Since kbuild can potentially perform two passes (first with the old | |
641 | # .config values and then with updated .config values), we cannot error out | |
642 | # if a desired compiler option is unsupported. If we were to error, kbuild | |
643 | # could never get to the second pass and actually notice that we changed | |
644 | # the option to something that was supported. | |
645 | # | |
646 | # Additionally, we don't want to fallback and/or silently change which compiler | |
647 | # flags will be used, since that leads to producing kernels with different | |
648 | # security feature characteristics depending on the compiler used. ("But I | |
649 | # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") | |
650 | # | |
651 | # The middle ground is to warn here so that the failed option is obvious, but | |
652 | # to let the build fail with bad compiler flags so that we can't produce a | |
653 | # kernel when there is a CONFIG and compiler mismatch. | |
654 | # | |
8779657d | 655 | ifdef CONFIG_CC_STACKPROTECTOR_REGULAR |
19952a92 KC |
656 | stackp-flag := -fstack-protector |
657 | ifeq ($(call cc-option, $(stackp-flag)),) | |
6c15b327 | 658 | $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \ |
27b2a49a | 659 | -fstack-protector not supported by compiler) |
19952a92 | 660 | endif |
6c15b327 JB |
661 | else |
662 | ifdef CONFIG_CC_STACKPROTECTOR_STRONG | |
8779657d KC |
663 | stackp-flag := -fstack-protector-strong |
664 | ifeq ($(call cc-option, $(stackp-flag)),) | |
665 | $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \ | |
666 | -fstack-protector-strong not supported by compiler) | |
667 | endif | |
19952a92 KC |
668 | else |
669 | # Force off for distro compilers that enable stack protector by default. | |
670 | stackp-flag := $(call cc-option, -fno-stack-protector) | |
5d707e9c | 671 | endif |
6c15b327 | 672 | endif |
19952a92 | 673 | KBUILD_CFLAGS += $(stackp-flag) |
e06b8b98 | 674 | |
61163efa BW |
675 | ifeq ($(COMPILER),clang) |
676 | KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) | |
677 | KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) | |
678 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) | |
679 | KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) | |
680 | KBUILD_CFLAGS += $(call cc-disable-warning, gnu) | |
681 | # Quiet clang warning: comparison of unsigned expression < 0 is always false | |
682 | KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) | |
683 | # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the | |
684 | # source of a reference will be _MergedGlobals and not on of the whitelisted names. | |
685 | # See modpost pattern 2 | |
686 | KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) | |
26ea6bb1 | 687 | KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) |
61163efa BW |
688 | else |
689 | ||
af0e5d56 DJ |
690 | # This warning generated too much noise in a regular build. |
691 | # Use make W=1 to enable this warning (see scripts/Makefile.build) | |
8417da6f | 692 | KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) |
61163efa | 693 | endif |
af0e5d56 | 694 | |
1da177e4 | 695 | ifdef CONFIG_FRAME_POINTER |
a0f97e06 | 696 | KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
1da177e4 | 697 | else |
7e9501fd RV |
698 | # Some targets (ARM with Thumb2, for example), can't be built with frame |
699 | # pointers. For those, we don't have FUNCTION_TRACER automatically | |
700 | # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is | |
701 | # incompatible with -fomit-frame-pointer with current GCC, so we don't use | |
702 | # -fomit-frame-pointer with FUNCTION_TRACER. | |
703 | ifndef CONFIG_FUNCTION_TRACER | |
a0f97e06 | 704 | KBUILD_CFLAGS += -fomit-frame-pointer |
1da177e4 | 705 | endif |
7e9501fd | 706 | endif |
1da177e4 | 707 | |
2062afb4 LT |
708 | KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) |
709 | ||
1da177e4 | 710 | ifdef CONFIG_DEBUG_INFO |
866ced95 AK |
711 | ifdef CONFIG_DEBUG_INFO_SPLIT |
712 | KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) | |
713 | else | |
a0f97e06 | 714 | KBUILD_CFLAGS += -g |
866ced95 | 715 | endif |
2288328c | 716 | KBUILD_AFLAGS += -Wa,-gdwarf-2 |
1da177e4 | 717 | endif |
bfaf2dd3 AK |
718 | ifdef CONFIG_DEBUG_INFO_DWARF4 |
719 | KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) | |
720 | endif | |
1da177e4 | 721 | |
d6f4ceb7 | 722 | ifdef CONFIG_DEBUG_INFO_REDUCED |
e82c4bb8 AK |
723 | KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
724 | $(call cc-option,-fno-var-tracking) | |
d6f4ceb7 AK |
725 | endif |
726 | ||
606576ce | 727 | ifdef CONFIG_FUNCTION_TRACER |
c0a80c0c HC |
728 | ifndef CC_FLAGS_FTRACE |
729 | CC_FLAGS_FTRACE := -pg | |
730 | endif | |
731 | export CC_FLAGS_FTRACE | |
a2546fae SR |
732 | ifdef CONFIG_HAVE_FENTRY |
733 | CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) | |
734 | endif | |
c0a80c0c | 735 | KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) |
a2546fae | 736 | KBUILD_AFLAGS += $(CC_USING_FENTRY) |
72441cb1 | 737 | ifdef CONFIG_DYNAMIC_FTRACE |
cf4db259 | 738 | ifdef CONFIG_HAVE_C_RECORDMCOUNT |
72441cb1 SR |
739 | BUILD_C_RECORDMCOUNT := y |
740 | export BUILD_C_RECORDMCOUNT | |
741 | endif | |
742 | endif | |
16444a8a ACM |
743 | endif |
744 | ||
91341d4b SR |
745 | # We trigger additional mismatches with less inlining |
746 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
747 | KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) | |
748 | endif | |
749 | ||
e8e69931 | 750 | # arch Makefile may override CC so keep this after arch Makefile is included |
e8f5bdb0 | 751 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 SR |
752 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
753 | ||
1da177e4 | 754 | # warn about C99 declaration after statement |
a0f97e06 | 755 | KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
1da177e4 | 756 | |
070b98bf | 757 | # disable pointer signed / unsigned warnings in gcc 4.0 |
8417da6f | 758 | KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) |
1da177e4 | 759 | |
fe8d0a41 | 760 | # disable invalid "can't wrap" optimizations for signed / pointers |
a137802e | 761 | KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
d0115552 | 762 | |
8f7f5c9f AK |
763 | # conserve stack if available |
764 | KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) | |
765 | ||
80970472 ST |
766 | # disallow errors like 'EXPORT_GPL(foo);' with missing header |
767 | KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) | |
768 | ||
769 | # require functions to have arguments in prototypes, not empty 'int foo()' | |
770 | KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) | |
771 | ||
fe7c36c7 JT |
772 | # Prohibit date/time macros, which would make the build non-deterministic |
773 | KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) | |
774 | ||
40df759e MM |
775 | # use the deterministic mode of AR if available |
776 | KBUILD_ARFLAGS := $(call ar-option,D) | |
777 | ||
bf5438fc JB |
778 | # check for 'asm goto' |
779 | ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) | |
780 | KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO | |
781 | endif | |
782 | ||
0b24becc | 783 | include $(srctree)/scripts/Makefile.kasan |
a86fe353 MY |
784 | include $(srctree)/scripts/Makefile.extrawarn |
785 | ||
06c5040c | 786 | # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments |
70cfe026 OÇ |
787 | KBUILD_CPPFLAGS += $(KCPPFLAGS) |
788 | KBUILD_AFLAGS += $(KAFLAGS) | |
789 | KBUILD_CFLAGS += $(KCFLAGS) | |
52bcc330 | 790 | |
18991197 RM |
791 | # Use --build-id when available. |
792 | LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ | |
f86fd306 | 793 | $(call cc-ldoption, -Wl$(comma)--build-id,)) |
6588169d | 794 | KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
18991197 RM |
795 | LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
796 | ||
5d7d18f5 | 797 | ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
d79a2719 | 798 | LDFLAGS_vmlinux += $(call ld-option, -X,) |
5d7d18f5 DH |
799 | endif |
800 | ||
1da177e4 | 801 | # Default kernel image to build when no specific target is given. |
070b98bf | 802 | # KBUILD_IMAGE may be overruled on the command line or |
1da177e4 LT |
803 | # set in the environment |
804 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
805 | # this default value | |
806 | export KBUILD_IMAGE ?= vmlinux | |
807 | ||
808 | # | |
809 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
810 | # images. Default is /boot, but you can set it to other values | |
811 | export INSTALL_PATH ?= /boot | |
812 | ||
f4d4ffc0 JC |
813 | # |
814 | # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. | |
815 | # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as | |
816 | # an argument if needed. Otherwise it defaults to the kernel install path | |
817 | # | |
818 | export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) | |
819 | ||
1da177e4 LT |
820 | # |
821 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
822 | # relocations required by build roots. This is not defined in the | |
070b98bf | 823 | # makefile but the argument can be passed to make if needed. |
1da177e4 LT |
824 | # |
825 | ||
df9df036 | 826 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
827 | export MODLIB |
828 | ||
ac031f26 | 829 | # |
3fbb43df MY |
830 | # INSTALL_MOD_STRIP, if defined, will cause modules to be |
831 | # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then | |
832 | # the default option --strip-debug will be used. Otherwise, | |
833 | # INSTALL_MOD_STRIP value will be used as the options to the strip command. | |
2ea03891 | 834 | |
ac031f26 TT |
835 | ifdef INSTALL_MOD_STRIP |
836 | ifeq ($(INSTALL_MOD_STRIP),1) | |
2ea03891 | 837 | mod_strip_cmd = $(STRIP) --strip-debug |
ac031f26 | 838 | else |
2ea03891 | 839 | mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
ac031f26 TT |
840 | endif # INSTALL_MOD_STRIP=1 |
841 | else | |
2ea03891 | 842 | mod_strip_cmd = true |
ac031f26 TT |
843 | endif # INSTALL_MOD_STRIP |
844 | export mod_strip_cmd | |
845 | ||
beb50df3 BJ |
846 | # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
847 | # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP | |
848 | # or CONFIG_MODULE_COMPRESS_XZ. | |
849 | ||
850 | mod_compress_cmd = true | |
851 | ifdef CONFIG_MODULE_COMPRESS | |
852 | ifdef CONFIG_MODULE_COMPRESS_GZIP | |
853 | mod_compress_cmd = gzip -n | |
854 | endif # CONFIG_MODULE_COMPRESS_GZIP | |
855 | ifdef CONFIG_MODULE_COMPRESS_XZ | |
856 | mod_compress_cmd = xz | |
857 | endif # CONFIG_MODULE_COMPRESS_XZ | |
858 | endif # CONFIG_MODULE_COMPRESS | |
859 | export mod_compress_cmd | |
860 | ||
1bf49dd4 | 861 | # Select initial ramdisk compression format, default is gzip(1). |
862 | # This shall be used by the dracut(8) tool while creating an initramfs image. | |
863 | # | |
7ac18156 JB |
864 | INITRD_COMPRESS-y := gzip |
865 | INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 | |
866 | INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma | |
867 | INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz | |
868 | INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo | |
869 | INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 | |
b7000ade LT |
870 | # do not export INITRD_COMPRESS, since we didn't actually |
871 | # choose a sane default compression above. | |
872 | # export INITRD_COMPRESS := $(INITRD_COMPRESS-y) | |
1da177e4 | 873 | |
d9d8d7ed | 874 | ifdef CONFIG_MODULE_SIG_ALL |
e2a666d5 RR |
875 | MODSECKEY = ./signing_key.priv |
876 | MODPUBKEY = ./signing_key.x509 | |
877 | export MODPUBKEY | |
4bc9410c | 878 | mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY) |
e2a666d5 RR |
879 | else |
880 | mod_sign_cmd = true | |
881 | endif | |
882 | export mod_sign_cmd | |
883 | ||
884 | ||
1da177e4 | 885 | ifeq ($(KBUILD_EXTMOD),) |
3a65dfe8 | 886 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
887 | |
888 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
889 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
890 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | |
891 | ||
892 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
30142230 | 893 | $(init-) $(core-) $(drivers-) $(net-) $(libs-)))) |
1da177e4 LT |
894 | |
895 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
896 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
897 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
898 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
899 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
900 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
901 | libs-y := $(libs-y1) $(libs-y2) | |
902 | ||
1f2bfbd0 | 903 | # Externally visible symbols (used by link-vmlinux.sh) |
95698570 SR |
904 | export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) |
905 | export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) | |
906 | export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds | |
1f2bfbd0 | 907 | export LDFLAGS_vmlinux |
6615d6c3 MM |
908 | # used by scripts/pacmage/Makefile |
909 | export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt) | |
9bb48247 | 910 | |
1f2bfbd0 | 911 | vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) |
1da177e4 | 912 | |
1f2bfbd0 SR |
913 | # Final link of vmlinux |
914 | cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) | |
915 | quiet_cmd_link-vmlinux = LINK $@ | |
1da177e4 | 916 | |
1f2bfbd0 SR |
917 | # Include targets which we want to |
918 | # execute if the rest of the kernel build went well. | |
919 | vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE | |
0f836e5f | 920 | ifdef CONFIG_HEADERS_CHECK |
0e7af8d0 | 921 | $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
267c4025 MD |
922 | endif |
923 | ifdef CONFIG_SAMPLES | |
924 | $(Q)$(MAKE) $(build)=samples | |
3794f3e8 RD |
925 | endif |
926 | ifdef CONFIG_BUILD_DOCSRC | |
927 | $(Q)$(MAKE) $(build)=Documentation | |
3ee7b3fa JK |
928 | endif |
929 | ifdef CONFIG_GDB_SCRIPTS | |
930 | $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py | |
0f836e5f | 931 | endif |
1f2bfbd0 | 932 | +$(call if_changed,link-vmlinux) |
741f98fe | 933 | |
38385f8f | 934 | # The actual objects are generated when descending, |
1da177e4 | 935 | # make sure no implicit rule kicks in |
1f2bfbd0 | 936 | $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
1da177e4 LT |
937 | |
938 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
939 | # Preset locale variables to speed up the build process. Limit locale | |
940 | # tweaks to this spot to avoid wrong language settings when running | |
941 | # make menuconfig etc. | |
942 | # Error messages still appears in the original language | |
943 | ||
4f193362 | 944 | PHONY += $(vmlinux-dirs) |
5bb78269 | 945 | $(vmlinux-dirs): prepare scripts |
1da177e4 LT |
946 | $(Q)$(MAKE) $(build)=$@ |
947 | ||
0d0e7718 MM |
948 | define filechk_kernel.release |
949 | echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
950 | endef | |
951 | ||
83a35e36 | 952 | # Store (new) KERNELRELEASE string in include/config/kernel.release |
f1d28fb0 | 953 | include/config/kernel.release: include/config/auto.conf FORCE |
0d0e7718 | 954 | $(call filechk,kernel.release) |
cb58455c SR |
955 | |
956 | ||
1da177e4 | 957 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
958 | # or the modules are listed in "prepare". |
959 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
960 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
961 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 962 | |
5bb78269 | 963 | # Listed in dependency order |
4f193362 | 964 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
5bb78269 | 965 | |
86feeaa8 | 966 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
967 | # and if so do: |
968 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
f1d28fb0 | 969 | prepare3: include/config/kernel.release |
1da177e4 | 970 | ifneq ($(KBUILD_SRC),) |
fd54f502 | 971 | @$(kecho) ' Using $(srctree) as source for kernel' |
c955ccaf | 972 | $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
5369f550 MM |
973 | echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
974 | echo >&2 " in the '$(srctree)' directory.";\ | |
1da177e4 LT |
975 | /bin/false; \ |
976 | fi; | |
1da177e4 LT |
977 | endif |
978 | ||
86feeaa8 | 979 | # prepare2 creates a makefile if using a separate output directory |
d8ecc5cd | 980 | prepare2: prepare3 outputmakefile asm-generic |
1da177e4 | 981 | |
d183e6f5 | 982 | prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ |
f7f16b77 | 983 | include/config/auto.conf |
7bb9d092 | 984 | $(cmd_crmodverdir) |
1da177e4 | 985 | |
6520fe55 | 986 | archprepare: archheaders archscripts prepare1 scripts_basic |
5bb78269 SR |
987 | |
988 | prepare0: archprepare FORCE | |
8d36a623 | 989 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 990 | |
1da177e4 | 991 | # All the preparing.. |
d395efb5 | 992 | prepare: prepare0 |
1da177e4 | 993 | |
1da177e4 LT |
994 | # Generate some files |
995 | # --------------------------------------------------------------------------- | |
996 | ||
997 | # KERNELRELEASE can change from a few different places, meaning version.h | |
998 | # needs to be updated, so this check is forced on all builds | |
999 | ||
1000 | uts_len := 64 | |
63104eec SR |
1001 | define filechk_utsrelease.h |
1002 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
1003 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
1004 | exit 1; \ | |
1005 | fi; \ | |
1006 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) | |
1007 | endef | |
1da177e4 LT |
1008 | |
1009 | define filechk_version.h | |
450c6076 JJ |
1010 | (echo \#define LINUX_VERSION_CODE $(shell \ |
1011 | expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ | |
63104eec | 1012 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) |
1da177e4 LT |
1013 | endef |
1014 | ||
d183e6f5 | 1015 | $(version_h): $(srctree)/Makefile FORCE |
1da177e4 | 1016 | $(call filechk,version.h) |
223c24a7 | 1017 | $(Q)rm -f $(old_version_h) |
1da177e4 | 1018 | |
273b281f | 1019 | include/generated/utsrelease.h: include/config/kernel.release FORCE |
63104eec SR |
1020 | $(call filechk,utsrelease.h) |
1021 | ||
179efcb4 VN |
1022 | PHONY += headerdep |
1023 | headerdep: | |
9663d989 PF |
1024 | $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
1025 | $(srctree)/scripts/headerdep.pl -I$(srctree)/include | |
179efcb4 | 1026 | |
1da177e4 LT |
1027 | # --------------------------------------------------------------------------- |
1028 | ||
4f193362 | 1029 | PHONY += depend dep |
1da177e4 LT |
1030 | depend dep: |
1031 | @echo '*** Warning: make $@ is unnecessary now.' | |
1032 | ||
88ecf814 DW |
1033 | # --------------------------------------------------------------------------- |
1034 | # Firmware install | |
1035 | INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware | |
1036 | export INSTALL_FW_PATH | |
1037 | ||
1038 | PHONY += firmware_install | |
1039 | firmware_install: FORCE | |
1040 | @mkdir -p $(objtree)/firmware | |
1041 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install | |
1042 | ||
8d730cfb DW |
1043 | # --------------------------------------------------------------------------- |
1044 | # Kernel headers | |
8d730cfb | 1045 | |
e6883b18 SR |
1046 | #Default location for installed headers |
1047 | export INSTALL_HDR_PATH = $(objtree)/usr | |
6d716275 | 1048 | |
2fb9b1bd SR |
1049 | # If we do an all arch process set dst to asm-$(hdr-arch) |
1050 | hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) | |
e6883b18 | 1051 | |
052ad274 PA |
1052 | PHONY += archheaders |
1053 | archheaders: | |
1054 | ||
6520fe55 PA |
1055 | PHONY += archscripts |
1056 | archscripts: | |
1057 | ||
e6883b18 | 1058 | PHONY += __headers |
d183e6f5 | 1059 | __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE |
e1b702cf | 1060 | $(Q)$(MAKE) $(build)=scripts build_unifdef |
e6883b18 SR |
1061 | |
1062 | PHONY += headers_install_all | |
2fb9b1bd SR |
1063 | headers_install_all: |
1064 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install | |
6d716275 | 1065 | |
8d730cfb | 1066 | PHONY += headers_install |
e6883b18 | 1067 | headers_install: __headers |
10b63956 DH |
1068 | $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ |
1069 | $(error Headers not exportable for the $(SRCARCH) architecture)) | |
1070 | $(Q)$(MAKE) $(hdr-inst)=include/uapi | |
1071 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) | |
8d730cfb | 1072 | |
1f85712e MF |
1073 | PHONY += headers_check_all |
1074 | headers_check_all: headers_install_all | |
2fb9b1bd | 1075 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
1f85712e | 1076 | |
68475359 DW |
1077 | PHONY += headers_check |
1078 | headers_check: headers_install | |
10b63956 DH |
1079 | $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 |
1080 | $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 | |
68475359 | 1081 | |
5a5da78b SK |
1082 | # --------------------------------------------------------------------------- |
1083 | # Kernel selftest | |
1084 | ||
1085 | PHONY += kselftest | |
1086 | kselftest: | |
1087 | $(Q)$(MAKE) -C tools/testing/selftests run_tests | |
1088 | ||
1da177e4 LT |
1089 | # --------------------------------------------------------------------------- |
1090 | # Modules | |
1091 | ||
1092 | ifdef CONFIG_MODULES | |
1093 | ||
070b98bf | 1094 | # By default, build modules as well |
1da177e4 | 1095 | |
73d1393e | 1096 | all: modules |
1da177e4 | 1097 | |
3fbb43df | 1098 | # Build modules |
551559e1 | 1099 | # |
3fbb43df MY |
1100 | # A module can be listed more than once in obj-m resulting in |
1101 | # duplicate lines in modules.order files. Those are removed | |
1102 | # using awk while concatenating to the final file. | |
1da177e4 | 1103 | |
4f193362 | 1104 | PHONY += modules |
2da30e70 | 1105 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
551559e1 | 1106 | $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
fd54f502 | 1107 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1108 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
44463f7d | 1109 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild |
1da177e4 | 1110 | |
a6c36632 MM |
1111 | modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
1112 | $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin | |
1113 | ||
73d1393e | 1114 | %/modules.builtin: include/config/auto.conf |
a6c36632 MM |
1115 | $(Q)$(MAKE) $(modbuiltin)=$* |
1116 | ||
1da177e4 LT |
1117 | |
1118 | # Target to prepare building external modules | |
4f193362 | 1119 | PHONY += modules_prepare |
5bb78269 | 1120 | modules_prepare: prepare scripts |
1da177e4 LT |
1121 | |
1122 | # Target to install modules | |
4f193362 | 1123 | PHONY += modules_install |
1da177e4 LT |
1124 | modules_install: _modinst_ _modinst_post |
1125 | ||
4f193362 | 1126 | PHONY += _modinst_ |
2da30e70 | 1127 | _modinst_: |
1da177e4 LT |
1128 | @rm -rf $(MODLIB)/kernel |
1129 | @rm -f $(MODLIB)/source | |
1130 | @mkdir -p $(MODLIB)/kernel | |
890676c6 | 1131 | @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source |
1da177e4 LT |
1132 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
1133 | rm -f $(MODLIB)/build ; \ | |
7e1c0477 | 1134 | ln -s $(CURDIR) $(MODLIB)/build ; \ |
1da177e4 | 1135 | fi |
551559e1 | 1136 | @cp -f $(objtree)/modules.order $(MODLIB)/ |
bc081dd6 | 1137 | @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
b805aa0e | 1138 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1139 | |
50a8ec31 | 1140 | # This depmod is only for convenience to give the initial |
1da177e4 LT |
1141 | # boot a modules.dep even before / is mounted read-write. However the |
1142 | # boot script depmod is the master version. | |
4f193362 | 1143 | PHONY += _modinst_post |
6d128e1e | 1144 | _modinst_post: _modinst_ |
88ecf814 | 1145 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst |
50a8ec31 | 1146 | $(call cmd,depmod) |
1da177e4 | 1147 | |
d890f510 JB |
1148 | ifeq ($(CONFIG_MODULE_SIG), y) |
1149 | PHONY += modules_sign | |
1150 | modules_sign: | |
1151 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign | |
1152 | endif | |
1153 | ||
1da177e4 LT |
1154 | else # CONFIG_MODULES |
1155 | ||
1156 | # Modules not configured | |
1157 | # --------------------------------------------------------------------------- | |
1158 | ||
1159 | modules modules_install: FORCE | |
5369f550 MM |
1160 | @echo >&2 |
1161 | @echo >&2 "The present kernel configuration has modules disabled." | |
1162 | @echo >&2 "Type 'make config' and enable loadable module support." | |
1163 | @echo >&2 "Then build a kernel with module support enabled." | |
1164 | @echo >&2 | |
1da177e4 LT |
1165 | @exit 1 |
1166 | ||
1167 | endif # CONFIG_MODULES | |
1168 | ||
1da177e4 LT |
1169 | ### |
1170 | # Cleaning is done on three levels. | |
1171 | # make clean Delete most generated files | |
1172 | # Leave enough to build external modules | |
1173 | # make mrproper Delete the current configuration, and all generated files | |
1174 | # make distclean Remove editor backup files, patch leftover files and the like | |
1175 | ||
1176 | # Directories & files removed with 'make clean' | |
1177 | CLEAN_DIRS += $(MODVERDIR) | |
1da177e4 LT |
1178 | |
1179 | # Directories & files removed with 'make mrproper' | |
d8ecc5cd | 1180 | MRPROPER_DIRS += include/config usr/include include/generated \ |
3fbb43df | 1181 | arch/*/include/generated .tmp_objdiff |
c22bd32c | 1182 | MRPROPER_FILES += .config .config.old .version .old_version \ |
d5b71936 RR |
1183 | Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
1184 | signing_key.priv signing_key.x509 x509.genkey \ | |
1185 | extra_certificates signing_key.x509.keyid \ | |
3ee7b3fa | 1186 | signing_key.x509.signer vmlinux-gdb.py |
1da177e4 LT |
1187 | |
1188 | # clean - Delete most, but leave enough to build external modules | |
1189 | # | |
1190 | clean: rm-dirs := $(CLEAN_DIRS) | |
1191 | clean: rm-files := $(CLEAN_FILES) | |
fb68d4be | 1192 | clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
1da177e4 | 1193 | |
bd1ee804 | 1194 | PHONY += $(clean-dirs) clean archclean vmlinuxclean |
1da177e4 LT |
1195 | $(clean-dirs): |
1196 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1197 | ||
bd1ee804 PM |
1198 | vmlinuxclean: |
1199 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean | |
1200 | ||
1201 | clean: archclean vmlinuxclean | |
1da177e4 LT |
1202 | |
1203 | # mrproper - Delete all generated files, including .config | |
1204 | # | |
1205 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1206 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1207 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1208 | ||
4f193362 | 1209 | PHONY += $(mrproper-dirs) mrproper archmrproper |
1da177e4 LT |
1210 | $(mrproper-dirs): |
1211 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1212 | ||
1213 | mrproper: clean archmrproper $(mrproper-dirs) | |
1214 | $(call cmd,rmdirs) | |
1215 | $(call cmd,rmfiles) | |
1216 | ||
1217 | # distclean | |
1218 | # | |
4f193362 | 1219 | PHONY += distclean |
1da177e4 LT |
1220 | |
1221 | distclean: mrproper | |
1222 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
070b98bf | 1223 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
1da177e4 | 1224 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
a03fcb50 | 1225 | -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ |
1da177e4 LT |
1226 | -type f -print | xargs rm -f |
1227 | ||
1228 | ||
1229 | # Packaging of the kernel to various formats | |
1230 | # --------------------------------------------------------------------------- | |
1231 | # rpm target kept for backward compatibility | |
c79624c1 | 1232 | package-dir := scripts/package |
1da177e4 | 1233 | |
bafb6747 ACM |
1234 | %src-pkg: FORCE |
1235 | $(Q)$(MAKE) $(build)=$(package-dir) $@ | |
031ecc6d | 1236 | %pkg: include/config/kernel.release FORCE |
6c2133e1 | 1237 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
031ecc6d | 1238 | rpm: include/config/kernel.release FORCE |
6c2133e1 | 1239 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
1da177e4 LT |
1240 | |
1241 | ||
1242 | # Brief documentation of the typical targets used | |
1243 | # --------------------------------------------------------------------------- | |
1244 | ||
5dffbe81 | 1245 | boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
a1e7b7bb | 1246 | boards := $(sort $(notdir $(boards))) |
5dffbe81 SB |
1247 | board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
1248 | board-dirs := $(sort $(notdir $(board-dirs:/=))) | |
1da177e4 LT |
1249 | |
1250 | help: | |
1251 | @echo 'Cleaning targets:' | |
5ea084ef | 1252 | @echo ' clean - Remove most generated files but keep the config and' |
5cc8d246 | 1253 | @echo ' enough build support to build external modules' |
5ea084ef | 1254 | @echo ' mrproper - Remove all generated files + config + various backup files' |
5cc8d246 | 1255 | @echo ' distclean - mrproper + remove editor backup and patch files' |
1da177e4 LT |
1256 | @echo '' |
1257 | @echo 'Configuration targets:' | |
1258 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1259 | @echo '' | |
1260 | @echo 'Other generic targets:' | |
1261 | @echo ' all - Build all targets marked with [*]' | |
1262 | @echo '* vmlinux - Build the bare kernel' | |
1263 | @echo '* modules - Build all modules' | |
9cc5d74c | 1264 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
88ecf814 DW |
1265 | @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' |
1266 | @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' | |
1da177e4 | 1267 | @echo ' dir/ - Build all files in dir and below' |
62718979 JP |
1268 | @echo ' dir/file.[oisS] - Build specified target only' |
1269 | @echo ' dir/file.lst - Build specified mixed source/assembly target only' | |
1270 | @echo ' (requires a recent binutils and recent build (System.map))' | |
155ad605 | 1271 | @echo ' dir/file.ko - Build module including final link' |
c4d5ee67 | 1272 | @echo ' modules_prepare - Set up for building external modules' |
1da177e4 LT |
1273 | @echo ' tags/TAGS - Generate tags file for editors' |
1274 | @echo ' cscope - Generate cscope index' | |
f4ed1009 | 1275 | @echo ' gtags - Generate GNU GLOBAL index' |
3f1d9a6c MM |
1276 | @echo ' kernelrelease - Output the release version string (use with make -s)' |
1277 | @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' | |
1278 | @echo ' image_name - Output the image name (use with make -s)' | |
2fb9b1bd | 1279 | @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
59df3230 | 1280 | echo ' (default: $(INSTALL_HDR_PATH))'; \ |
2fb9b1bd | 1281 | echo '' |
1da177e4 | 1282 | @echo 'Static analysers' |
1da177e4 LT |
1283 | @echo ' checkstack - Generate a list of stack hogs' |
1284 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
aa025e7d | 1285 | @echo ' versioncheck - Sanity check on version.h usage' |
ec2d987f | 1286 | @echo ' includecheck - Check for duplicate included header files' |
295ac051 | 1287 | @echo ' export_report - List the usages of all exported symbols' |
179efcb4 | 1288 | @echo ' headers_check - Sanity check on exported headers' |
74425eee NP |
1289 | @echo ' headerdep - Detect inclusion cycles in headers' |
1290 | @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help | |
1291 | @echo '' | |
5a5da78b SK |
1292 | @echo 'Kernel selftest' |
1293 | @echo ' kselftest - Build and run kernel selftest (run as root)' | |
1294 | @echo ' Build, install, and boot kernel before' | |
1295 | @echo ' running kselftest on it' | |
1296 | @echo '' | |
1da177e4 | 1297 | @echo 'Kernel packaging:' |
6c2133e1 | 1298 | @$(MAKE) $(build)=$(package-dir) help |
1da177e4 LT |
1299 | @echo '' |
1300 | @echo 'Documentation targets:' | |
1301 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1302 | @echo '' | |
01dee188 | 1303 | @echo 'Architecture specific targets ($(SRCARCH)):' |
1da177e4 | 1304 | @$(if $(archhelp),$(archhelp),\ |
01dee188 | 1305 | echo ' No architecture specific help defined for $(SRCARCH)') |
1da177e4 LT |
1306 | @echo '' |
1307 | @$(if $(boards), \ | |
1308 | $(foreach b, $(boards), \ | |
1309 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1310 | echo '') | |
5dffbe81 SB |
1311 | @$(if $(board-dirs), \ |
1312 | $(foreach b, $(board-dirs), \ | |
1313 | printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ | |
1314 | printf " %-16s - Show all of the above\\n" help-boards; \ | |
1315 | echo '') | |
1da177e4 LT |
1316 | |
1317 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
45d506bd | 1318 | @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
1da177e4 | 1319 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
701842e3 DK |
1320 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' |
1321 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK' | |
af07ce3e | 1322 | @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
28bc20dc SR |
1323 | @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
1324 | @echo ' 1: warnings which may be relevant and do not occur too often' | |
1325 | @echo ' 2: warnings which occur quite often but may still be relevant' | |
1326 | @echo ' 3: more obscure warnings, can most likely be ignored' | |
a6de553d | 1327 | @echo ' Multiple levels can be combined with W=12 or W=123' |
1da177e4 LT |
1328 | @echo '' |
1329 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1330 | @echo 'For further info see the ./README file' | |
1331 | ||
1332 | ||
5dffbe81 SB |
1333 | help-board-dirs := $(addprefix help-,$(board-dirs)) |
1334 | ||
1335 | help-boards: $(help-board-dirs) | |
1336 | ||
fbae4d58 | 1337 | boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
5dffbe81 SB |
1338 | |
1339 | $(help-board-dirs): help-%: | |
1340 | @echo 'Architecture specific targets ($(SRCARCH) $*):' | |
1341 | @$(if $(boards-per-dir), \ | |
1342 | $(foreach b, $(boards-per-dir), \ | |
1343 | printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ | |
1344 | echo '') | |
1345 | ||
1346 | ||
1da177e4 LT |
1347 | # Documentation targets |
1348 | # --------------------------------------------------------------------------- | |
1349 | %docs: scripts_basic FORCE | |
bffd2020 | 1350 | $(Q)$(MAKE) $(build)=scripts build_docproc |
1da177e4 LT |
1351 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
1352 | ||
1353 | else # KBUILD_EXTMOD | |
1354 | ||
1355 | ### | |
1356 | # External module support. | |
1357 | # When building external modules the kernel used as basis is considered | |
1358 | # read-only, and no consistency checks are made and the make | |
1359 | # system is not used on the basis kernel. If updates are required | |
1360 | # in the basis kernel ordinary make commands (without M=...) must | |
1361 | # be used. | |
1362 | # | |
1363 | # The following are the only valid targets when building external | |
1364 | # modules. | |
1365 | # make M=dir clean Delete all automatically generated files | |
1366 | # make M=dir modules Make all modules in specified dir | |
1367 | # make M=dir Same as 'make M=dir modules' | |
1368 | # make M=dir modules_install | |
070b98bf | 1369 | # Install the modules built in the module directory |
1da177e4 LT |
1370 | # Assumes install directory is already created |
1371 | ||
1372 | # We are always building modules | |
1373 | KBUILD_MODULES := 1 | |
4f193362 | 1374 | PHONY += crmodverdir |
1da177e4 | 1375 | crmodverdir: |
7bb9d092 | 1376 | $(cmd_crmodverdir) |
1da177e4 | 1377 | |
4f193362 | 1378 | PHONY += $(objtree)/Module.symvers |
1da177e4 LT |
1379 | $(objtree)/Module.symvers: |
1380 | @test -e $(objtree)/Module.symvers || ( \ | |
1381 | echo; \ | |
1382 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1383 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1384 | echo ) | |
1385 | ||
1386 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
4f193362 | 1387 | PHONY += $(module-dirs) modules |
1da177e4 LT |
1388 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
1389 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1390 | ||
1391 | modules: $(module-dirs) | |
fd54f502 | 1392 | @$(kecho) ' Building modules, stage 2.'; |
b805aa0e | 1393 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
1da177e4 | 1394 | |
4f193362 | 1395 | PHONY += modules_install |
a67dc21a | 1396 | modules_install: _emodinst_ _emodinst_post |
e6304663 | 1397 | |
4f193362 PS |
1398 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
1399 | PHONY += _emodinst_ | |
a67dc21a | 1400 | _emodinst_: |
a67dc21a | 1401 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
b805aa0e | 1402 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
1da177e4 | 1403 | |
4f193362 | 1404 | PHONY += _emodinst_post |
a67dc21a SR |
1405 | _emodinst_post: _emodinst_ |
1406 | $(call cmd,depmod) | |
1407 | ||
1da177e4 LT |
1408 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
1409 | ||
4f193362 | 1410 | PHONY += $(clean-dirs) clean |
1da177e4 LT |
1411 | $(clean-dirs): |
1412 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1413 | ||
1414 | clean: rm-dirs := $(MODVERDIR) | |
88d7be03 | 1415 | clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
1da177e4 LT |
1416 | |
1417 | help: | |
1418 | @echo ' Building external modules.' | |
1419 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1420 | @echo '' | |
1421 | @echo ' modules - default target, build the module(s)' | |
1422 | @echo ' modules_install - install the module' | |
1423 | @echo ' clean - remove generated files in module directory only' | |
1424 | @echo '' | |
06300b21 SR |
1425 | |
1426 | # Dummies... | |
4f193362 | 1427 | PHONY += prepare scripts |
06300b21 SR |
1428 | prepare: ; |
1429 | scripts: ; | |
1da177e4 LT |
1430 | endif # KBUILD_EXTMOD |
1431 | ||
88d7be03 MM |
1432 | clean: $(clean-dirs) |
1433 | $(call cmd,rmdirs) | |
1434 | $(call cmd,rmfiles) | |
43f67c98 | 1435 | @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
88d7be03 | 1436 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
addbcdbb | 1437 | -o -name '*.ko.*' \ |
866ced95 | 1438 | -o -name '*.dwo' \ |
88d7be03 MM |
1439 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
1440 | -o -name '*.symtypes' -o -name 'modules.order' \ | |
1441 | -o -name modules.builtin -o -name '.tmp_*.o.*' \ | |
1442 | -o -name '*.gcno' \) -type f -print | xargs rm -f | |
1443 | ||
1da177e4 LT |
1444 | # Generate tags for editors |
1445 | # --------------------------------------------------------------------------- | |
a680eedc SR |
1446 | quiet_cmd_tags = GEN $@ |
1447 | cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ | |
1da177e4 | 1448 | |
f4ed1009 | 1449 | tags TAGS cscope gtags: FORCE |
1da177e4 LT |
1450 | $(call cmd,tags) |
1451 | ||
1da177e4 LT |
1452 | # Scripts to check various things for consistency |
1453 | # --------------------------------------------------------------------------- | |
1454 | ||
279f3dd3 PF |
1455 | PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
1456 | ||
1da177e4 | 1457 | includecheck: |
436f876c | 1458 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1459 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1460 | | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
1da177e4 LT |
1461 | |
1462 | versioncheck: | |
2ee2d292 | 1463 | find $(srctree)/* $(RCS_FIND_IGNORE) \ |
1da177e4 | 1464 | -name '*.[hcS]' -type f -print | sort \ |
80007434 | 1465 | | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
1da177e4 | 1466 | |
74425eee NP |
1467 | coccicheck: |
1468 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ | |
1469 | ||
1da177e4 LT |
1470 | namespacecheck: |
1471 | $(PERL) $(srctree)/scripts/namespace.pl | |
1472 | ||
295ac051 AB |
1473 | export_report: |
1474 | $(PERL) $(srctree)/scripts/export_report.pl | |
1475 | ||
1da177e4 LT |
1476 | endif #ifeq ($(config-targets),1) |
1477 | endif #ifeq ($(mixed-targets),1) | |
1478 | ||
c398ff00 | 1479 | PHONY += checkstack kernelrelease kernelversion image_name |
e3ccf6e3 | 1480 | |
011e3a9a JD |
1481 | # UML needs a little special treatment here. It wants to use the host |
1482 | # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone | |
1483 | # else wants $(ARCH), including people doing cross-builds, which means | |
1484 | # that $(SUBARCH) doesn't work here. | |
1485 | ifeq ($(ARCH), um) | |
1486 | CHECKSTACK_ARCH := $(SUBARCH) | |
1487 | else | |
1488 | CHECKSTACK_ARCH := $(ARCH) | |
1489 | endif | |
1da177e4 LT |
1490 | checkstack: |
1491 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
011e3a9a | 1492 | $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
1da177e4 | 1493 | |
7b8ea53d AW |
1494 | kernelrelease: |
1495 | @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" | |
01ab1788 | 1496 | |
cb58455c | 1497 | kernelversion: |
2244cbd8 | 1498 | @echo $(KERNELVERSION) |
1da177e4 | 1499 | |
c398ff00 MM |
1500 | image_name: |
1501 | @echo $(KBUILD_IMAGE) | |
1502 | ||
ea01fa9f BP |
1503 | # Clear a bunch of variables before executing the submake |
1504 | tools/: FORCE | |
bf35182f | 1505 | $(Q)mkdir -p $(objtree)/tools |
16671c1e | 1506 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(O) subdir=tools -C $(src)/tools/ |
ea01fa9f BP |
1507 | |
1508 | tools/%: FORCE | |
bf35182f | 1509 | $(Q)mkdir -p $(objtree)/tools |
16671c1e | 1510 | $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(O) subdir=tools -C $(src)/tools/ $* |
ea01fa9f | 1511 | |
06300b21 SR |
1512 | # Single targets |
1513 | # --------------------------------------------------------------------------- | |
bc2546a6 | 1514 | # Single targets are compatible with: |
e1b8513d | 1515 | # - build with mixed source and output |
bc2546a6 SR |
1516 | # - build with separate output dir 'make O=...' |
1517 | # - external modules | |
1518 | # | |
1519 | # target-dir => where to store outputfile | |
1520 | # build-dir => directory in kernel source tree to use | |
1521 | ||
1522 | ifeq ($(KBUILD_EXTMOD),) | |
aa360879 | 1523 | build-dir = $(patsubst %/,%,$(dir $@)) |
bc2546a6 SR |
1524 | target-dir = $(dir $@) |
1525 | else | |
1526 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) | |
1527 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) | |
1528 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) | |
1529 | endif | |
1530 | ||
f6ecebd6 | 1531 | %.s: %.c prepare scripts FORCE |
bc2546a6 | 1532 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1533 | %.i: %.c prepare scripts FORCE |
bc2546a6 | 1534 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1535 | %.o: %.c prepare scripts FORCE |
bc2546a6 | 1536 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1537 | %.lst: %.c prepare scripts FORCE |
bc2546a6 | 1538 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1539 | %.s: %.S prepare scripts FORCE |
bc2546a6 | 1540 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
f6ecebd6 | 1541 | %.o: %.S prepare scripts FORCE |
bc2546a6 | 1542 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
15fde675 AG |
1543 | %.symtypes: %.c prepare scripts FORCE |
1544 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) | |
06300b21 | 1545 | |
bc2546a6 | 1546 | # Modules |
31110ebb SR |
1547 | /: prepare scripts FORCE |
1548 | $(cmd_crmodverdir) | |
1549 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ | |
1550 | $(build)=$(build-dir) | |
8e2faea8 PF |
1551 | # Make sure the latest headers are built for Documentation |
1552 | Documentation/: headers_install | |
31110ebb | 1553 | %/: prepare scripts FORCE |
7bb9d092 | 1554 | $(cmd_crmodverdir) |
06300b21 | 1555 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 SR |
1556 | $(build)=$(build-dir) |
1557 | %.ko: prepare scripts FORCE | |
7bb9d092 | 1558 | $(cmd_crmodverdir) |
06300b21 | 1559 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
bc2546a6 | 1560 | $(build)=$(build-dir) $(@:.ko=.o) |
b805aa0e | 1561 | $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
06300b21 | 1562 | |
38385f8f | 1563 | # FIXME Should go into a make.lib or something |
1da177e4 LT |
1564 | # =========================================================================== |
1565 | ||
1566 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1567 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1568 | ||
1569 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1570 | cmd_rmfiles = rm -f $(rm-files) | |
1571 | ||